Cooling equipment unit and working machine

Abstract

To provide a work machine which can easily replace a plurality of cooling devices while securing mounting strength of the plurality of cooling devices.SOLUTION: A cooling device unit comprises: a first and second cooling devices which are arrayed in a first direction on a support bracket extending in the first direction; a fitting bracket which is removably fitted at a top of the first cooling device and a top of the second cooling device; and a frame member which connects a middle part of the support bracket in the first direction with a middle part of the fitting bracket in the first direction. The support bracket, the first and second cooling devices, the fitting bracket, and the frame member can be integrally suspended in a condition that the first and second cooling devices are sandwiched between the fitting bracket and the support bracket and the middle part of the fitting bracket is connected with the middle part of the support bracket by the frame member. Each of the first cooling device and the second cooling device is individually taken out by removing the fitting bracket.SELECTED DRAWING: Figure 61

Description

[Technical field]

[0001] The present invention relates to a cooling equipment unit mounted on a work machine such as a backhoe, and the work machine. [Background technology]

[0002] 2. Description of the Related Art A working machine disclosed in Patent Document 1 is known in the art.

[0003] The work machine disclosed in Patent Document 1 has a first cooler (radiator) and a second cooler (oil cooler) arranged in series in the width direction of the machine body. An oil cooler bracket for mounting the oil cooler is attached to a radiator bracket for mounting the radiator. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-65569 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the working machine disclosed in Patent Document 1, when replacing the radiator, the oil cooler must also be removed, making it difficult to replace the radiator.

[0006] In view of the above-mentioned problems, the present invention has an object to provide a work machine that allows multiple coolers to be easily replaced while ensuring the mounting strength of the multiple coolers. [Means for solving the problem]

[0007] A cooling equipment unit according to one embodiment of the present invention comprises a support bracket extending in a first direction, a first cooler and a second cooler arranged in parallel along the first direction on the support bracket, a mating bracket provided across an upper portion of the first cooler and an upper portion of the second cooler and removably fitted to the upper portions of the first cooler and the second cooler, and a frame member connecting a midway portion of the support bracket in the first direction to a midway portion of the mating bracket in the first direction, wherein the support bracket, the first cooler, the second cooler, the mating bracket, and the frame member can be suspended together with the first cooler and the second cooler sandwiched between the mating bracket and the support bracket and the midway portion of the mating bracket and the midway portion of the support bracket connected by the frame member, and the first cooler and the second cooler are each independently supported by the support bracket and the mating bracket and can be individually removed by removing the mating bracket. Effect of the Invention

[0008] According to the above configuration, the first cooler and the second cooler can be removed individually by removing the fitting bracket, and the coolers can be easily replaced. In addition, the first cooler and the second cooler are mounted via elastic members, thereby improving the mounting strength. [Brief description of the drawings]

[0009] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 4 is a perspective view of a mounting portion of a swivel joint. [Figure 7]FIG. 4 is a side cross-sectional view of a mounting portion of the swivel joint. [Figure 8] FIG. 2 is a perspective view of the upper part of the swivel joint. [Figure 9] FIG. 2 is a side cross-sectional view of the upper part of the swivel joint. [Figure 10] FIG. 4 is a plan view showing the cover structure at the top of the swivel joint. [Figure 11] FIG. [Figure 12] FIG. 4 is a plan view of the rear end portion of the revolving frame. [Figure 13] 13 is a cross-sectional view taken along line Z1-Z1 in FIG. 12. [Figure 14] 13 is a cross-sectional view taken along line Z2-Z2 in FIG. 12. [Figure 15] 13 is a cross-sectional view taken along line Z3-Z3 in FIG. 12. [Figure 16] 13 is a cross-sectional view taken along line Z4-Z4 in FIG. 12. [Figure 17] FIG. [Figure 18] FIG. 2 is a side view of the aircraft with the driver's seat and engine attached. [Figure 19] FIG. [Figure 20] FIG. [Figure 21] FIG. [Figure 22] FIG. [Diagram 23] FIG. 2 is a perspective view of a first slide rail. [Figure 24] FIG. 2 is a rear view of the first slide rail and the second slide rail. [Diagram 25] FIG. 4 is a side cross-sectional view of the first slide rail. [Figure 26] FIG. [Figure 27] FIG. 4 is a perspective view of a second slide rail. [Figure 28] FIG. [Figure 29] FIG. [Diagram 30] FIG. [Diagram 31] 11 is a perspective view of the partition member with the inspection opening open. FIG. [Diagram 32] FIG. [Diagram 33] FIG. [Diagram 34] 33 is a cross-sectional view taken along line Z5-Z5 in FIG. 32. [Diagram 35] 33 is a cross-sectional view taken along line Z6-Z6 in FIG. 32. [Diagram 36] FIG. 4 is a side cross-sectional view of the partition member. [Figure 37] FIG. 4 is a plan cross-sectional view of a hydraulic hose routing portion. [Figure 38] FIG. [Figure 39] FIG. 2 is a plan view showing the arrangement of equipment in the engine room. [Diagram 40] FIG. 2 is a perspective view showing the arrangement of fuel system devices. [Diagram 41] FIG. 4 is a side view of the portion where the sedimenter is arranged. [Diagram 42] FIG. 4 is a perspective view showing the installation of a sedimenter and a sedimenter cover. [Diagram 43] FIG. 4 is a rear perspective view showing the installation of the fuel pump, the reflux valve, and the check valve. [Diagram 44] FIG. 2 is an exploded perspective view showing the installation of a fuel pump, a reflux valve, and a check valve. [Diagram 45] FIG. 2 is a system diagram showing a fuel distribution path. [Figure 46] FIG. 4 is a side view of the portion where the sub-tank is disposed. [Figure 47] FIG. 2 is a side view of the fuel tank and the sub-tank. [Figure 48] 4 is a side cross-sectional view of a connecting portion between the fuel tank and the fuel supply unit. FIG. [Figure 49] FIG. 4 is an exploded perspective view showing the attachment of the storage box. [Figure 50] 13 is a rear cross-sectional view of the mounting portion of the storage box. FIG. [Figure 51] FIG. 4 is a plan cross-sectional view of the mounting portion of the storage box. [Figure 52] FIG. 2 is a perspective view of the front side of the storage box. [Figure 53] FIG. 2 is a perspective view of the rear side of the storage box. [Figure 54] FIG. [Figure 55] FIG. 2 is a perspective view of a portion in which a cooling system equipment unit and the like are arranged. [Figure 56] FIG. [Figure 57] FIG. 2 is a perspective view of a portion where a base member is provided. [Figure 58] FIG. 2 is an exploded perspective view of the mounting portion of the support and the support. [Figure 59] FIG. 4 is a perspective view of the mounting portion of the base member. [Figure 60] 13 is a perspective view of the mounting portion of the base member with the support plate removed. FIG. [Figure 61] FIG. [Figure 62] FIG. 2 is a front perspective view of the portion in which the cooling system equipment unit is arranged. [Figure 63A] FIG. 4 is an exploded perspective view showing the assembly of a radiator and an oil cooler. [Figure 63B] FIG. 2 is a perspective view of the upper part of the shroud as viewed from the left side. [Figure 64] FIG. 4 is a side view of the portion in which the cooling system equipment unit is arranged. [Figure 65] This is a cross-sectional view taken along line Z7-Z7 in Figure 64. [Figure 66] FIG. 4 is a perspective view showing a state in which a frame member has been removed. [Figure 67] FIG. 2 is an exploded perspective view of a frame member, a condenser, a fuel cooler, and a receiver. [Figure 68] FIG. 2 is a plan view of the portion in which the cooling system equipment unit is arranged. [Figure 69] FIG. 11 is a rear view showing the operation of the restricting piece. [Figure 70A] 1 is a perspective view of a mounting portion of a partition structure. FIG. [Figure 70B] FIG. 4 is a perspective view of the support bracket as viewed from the left. [Figure 71] FIG. [Figure 72] FIG. 4 is an exploded perspective view showing the installation of the partition structure. [Figure 73] FIG. [Figure 74] 1 is a perspective view showing a state in which harnesses, hoses, etc. are inserted into the partition structure. FIG. [Figure 75] FIG. [Figure 76A] FIG. [Figure 76B] FIG. 2 is a perspective view of the shroud as viewed from the upper rear right side. [Figure 76C] FIG. [Figure 77] FIG. 4 is an exploded perspective view showing a seal structure at an upper front portion of the shroud. [Figure 78] FIG. 4 is an exploded perspective view showing a seal structure at a front lower portion of the shroud. [Figure 79] FIG. 4 is an exploded perspective view showing a seal structure at an upper rear portion of the shroud. [Figure 80] FIG. 4 is an exploded perspective view showing a seal structure at a rear lower portion of the shroud. [Figure 81] 65 is a cross-sectional view taken along line Z8-Z8 in FIG. 64. [Figure 82] 65 is a cross-sectional view taken along line Z9-Z9 in FIG. 64. [Figure 83] FIG. [Figure 84] FIG. [Figure 85] FIG. [Figure 86] FIG. 4 is a perspective view of the frame member as viewed from the left side. [Figure 87] FIG. 4 is a perspective view showing a supporting portion of the first cover member. [Figure 88] FIG. 2 is a rear cross-sectional view of the right side of the fuselage. [Figure 89] 4 is a perspective view showing a state in which a harness is routed around a frame member. FIG. [Figure 90]FIG. 2 is a perspective view showing the arrangement of the battery. [Figure 91] FIG. 2 is a perspective view of the first battery as viewed from the front side. [Figure 92] FIG. 2 is a perspective view of the first battery as viewed from the rear side. [Figure 93] FIG. [Figure 94] 2 is a front perspective view of the battery stand seen from below. FIG. [Figure 95] FIG. [Figure 96] FIG. 4 is a side cross-sectional view of a lower part of the first battery. [Figure 97] FIG. 4 is a perspective view of the second battery as viewed from the front side. [Figure 98] FIG. 4 is a perspective view of the second battery as viewed from the rear side. [Figure 99] FIG. 4 is a side cross-sectional view of a lower part of the second battery. [Figure 100] FIG. 2 is a perspective view of a portion where a hydraulic oil tank is disposed. [Figure 101] FIG. 4 is a perspective view of the mounting portion of the hydraulic oil tank as viewed from the rear side. [Figure 102] FIG. 4 is a front side perspective view of the mounting portion of the hydraulic oil tank. [Figure 103] FIG. [Figure 104] FIG. [Figure 105] FIG. 4 is a side view showing a structure for mounting the cooling system equipment unit. [Fig. 106] FIG. 2 is a perspective view of the support bracket, the fitting bracket, and the connector. [Figure 107] FIG. 4 is an exploded perspective view of a first connecting member. [Figure 108] FIG. 4 is an exploded perspective view of a second connecting member. [Fig. 109] FIG. 2 is a perspective view of the fuel cooler and the mounting frame. [Figure 110] FIG. 4 is a perspective view of a mounting portion of the fan cover. [Figure 111] FIG. 4 is a rear view of the mounting portion of the fan cover. [Figure 112] FIG. 1 is a side view of a mounting portion of a fan cover; [Figure 113] FIG. [Fig. 114] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] Fig. 1 is a schematic side view showing the overall configuration of a working machine 1 according to this embodiment. Fig. 2 is a schematic plan view omitting a working device of the working machine 1. In this embodiment, a backhoe, which is a rotating working machine, is exemplified as the working machine 1.

[0012] As shown in Figures 1 and 2, the work machine 1 includes a machine body (swivel base) 2, a traveling device 3, and a work device 4. A cabin 5 is mounted on the machine body 2. The cabin 5 is mounted on the left side and toward the front of the machine body 2. A driver's seat (seat) 6 for an operator (driver) is provided inside the cabin 5. The driver's seat 6 is surrounded by the cabin 5.

[0013] In an embodiment of the present invention, the front side of an operator seated in the driver's seat 6 of the work machine 1 (the direction of arrow A1 in Figures 1 and 2) will be described as the front, the rear side of the operator (the direction of arrow A2 in Figures 1 and 2) will be described as the rear, the left side of the operator (the front side in Figure 1, the direction of arrow B1 in Figure 2) will be described as the left side, and the right side of the operator (the back side in Figure 1, the direction of arrow B2 in Figure 2) will be described as the right side.

[0014] Additionally, the horizontal direction perpendicular to the front-rear direction K1 will be described as the body width direction K2 (see FIG. 2). The direction from the center of the width direction of the body 2 toward the right or left will be described as the body outside. In other words, the body outside is the body width direction K2 direction that moves away from the width direction center of the body 2. The direction opposite to the body outside is described as the body inside. In other words, the body inside is the body width direction K2 direction that moves closer to the width direction center of the body 2.

[0015] As shown in FIG. 1, the traveling device 3 has a traveling frame 9 and a traveling mechanism 10. The traveling mechanism 10 is configured by a crawler type traveling mechanism driven by a hydraulic motor. In this embodiment, the traveling device 3 is a crawler type traveling device. The traveling mechanisms 10 are provided on the left and right sides of the traveling frame 9. A dozer device 7 is attached to the front of the traveling device 3. The dozer device 7 can be raised and lowered by a hydraulic cylinder.

[0016] As shown in FIG. 1, the working device 4 is provided at the front of the machine body 2, and has a boom 15, an arm 16, and a bucket (working tool) 17. The base of the boom 15 is pivotally attached to a swing bracket 14 so as to be rotatable (swingable up and down) around a horizontal axis (axis extending in the machine body width direction K2). The swing bracket 14 is supported by a support bracket 18 provided at the front of the machine body 2 so as to be rotatable around a vertical axis (axis extending in the up and down direction). The arm 16 is pivotally attached to the tip of the boom 15 so as to be rotatable (swingable back and forth or up and down) around the horizontal axis. The bucket 17 is provided at the tip of the arm 16 so as to be capable of scooping and dumping operations. Instead of or in addition to the bucket 17, the working machine 1 can be equipped with another working tool (hydraulic attachment) that can be driven by a hydraulic actuator. Other examples of working tools include hydraulic breakers, hydraulic crushers, angle brooms, earth augers, pallet forks, sweepers, mowers, snow blowers, etc.

[0017] The swing bracket 14 swings around the vertical axis by the extension and retraction of a hydraulic cylinder. The boom 15 swings by the extension and retraction of a boom cylinder C3. The arm 16 swings by the extension and retraction of an arm cylinder C4. The bucket 17 performs scooping and dumping operations by the extension and retraction of a bucket cylinder (work tool cylinder) C5. The boom cylinder C3, arm cylinder C4, and bucket cylinder C5 are composed of hydraulic cylinders (hydraulic actuators).

[0018] 1, the machine body 2 is supported on a traveling frame 9 so as to be rotatable (rotatable left and right) about a vertical axis via a swivel bearing 8. A weight 46 is provided at the rear of the machine body 2.

[0019] As shown in Fig. 2, a prime mover E1 is mounted on the rear of the aircraft body 2. The prime mover E1 is a diesel engine. The prime mover E1 may be a gasoline engine, an LPG engine, or an electric motor, or may be a hybrid type having an engine and an electric motor. The prime mover E1 is disposed on the rear side of the cabin 5.

[0020] A hydraulic pump P1 and an exhaust gas purification device D1 are provided on the left side of the prime mover E1. The hydraulic pump P1 is driven by the power of the prime mover E1. This hydraulic pump P1 discharges hydraulic oil (pressurized oil) that drives hydraulic actuators such as hydraulic motors and hydraulic cylinders equipped on the work machine 1. The hydraulic pump P1 also discharges pilot pressure that operates hydraulic valves and hydraulic pressure for signals. The hydraulic pump P1 is composed of, for example, multiple pumps.

[0021] The exhaust gas purification device D1 is a device that purifies the exhaust gas discharged from the prime mover E1, and is, for example, a DPF (Diesel particulate filter).

[0022] As shown in FIG. 2, a cooling fan F1 and a compressor G1 are provided on the right side of the prime mover E1. Therefore, the exhaust gas purification device D1 is disposed on the side of the prime mover E1, opposite to the cooling fan F1. The cooling fan F1 and the compressor G1 are driven by the power of the prime mover E1. The cooling fan F1 is a suction type fan that draws in air (outside air) from the right side of the machine body 2 and flows it toward the prime mover E1 and the exhaust gas purification device D1, thereby cooling the prime mover E1, the exhaust gas purification device D1, etc. The direction of the arrow K3 in FIG. 2 indicates the flow direction of the cooling air by the cooling fan F1. The compressor G1 is a device that constitutes a part of the air conditioning device equipped on the work machine 1, and compresses the refrigerant (air conditioning gas) to make it semi-liquid.

[0023] As shown in FIG. 2, a radiator (first cooler) R1 and an oil cooler (second cooler) O1 are disposed on the right side of the cooling fan F1. The oil cooler O1 is disposed in front of the radiator R1. The radiator R1 and the oil cooler O1 are disposed so that their core parts face the aircraft width direction K2 (so that the thickness direction of the core coincides with the aircraft width direction K2). That is, the radiator R1 and the oil cooler O1 are disposed side by side in parallel in the front-rear direction. In other words, the radiator R1 and the oil cooler O1 are disposed in parallel in the front-rear direction in the aircraft width direction K2 (the flow direction K3 of the cooling air). The radiator R1 is a cooler (heat exchanger) that cools the coolant of the prime mover E1. The oil cooler O1 is a cooler that cools the hydraulic oil returning to the hydraulic oil tank T2. The radiator R1 and the oil cooler O1 are cooled by the cooling air sucked in by the cooling fan F1.

[0024] A condenser G3 (third cooler) and a receiver (cooling system device) G2, which are cooling system devices of the air conditioner, and a fuel cooler (fourth cooler) N1 are arranged on the right side of the radiator R1. The condenser G3 is arranged facing the right side of the radiator R1. The fuel cooler N1 is also arranged on the right side of the rear of the condenser G3. Therefore, the condenser G3, the radiator R1, and the fuel cooler N1 (multiple coolers) are arranged in series in the aircraft width direction K2 (cooling air flow direction K3). The receiver G2 is arranged on the right side of the front part of the condenser G3 and in front of the fuel cooler N1.

[0025] The condenser G3 is a cooler that cools the refrigerant that has been semi-liquidized by the compressor G1 to promote liquefaction. The receiver G2 is a device that separates the refrigerant that could not be liquefied by the condenser G3 from the liquefied refrigerant and removes moisture and impurities. The fuel cooler N1 is a cooler that cools the return fuel from the prime mover E1 before it is returned to the fuel tank T1. The fuel tank T1 is a tank that stores fuel for the prime mover E1. The fuel tank T1 is mounted on the left front part of the aircraft 2.

[0026] The radiator R1, the oil cooler O1, the condenser G3, and the fuel cooler N1 are collectively referred to as a cooler. The radiator R1, the oil cooler O1, the condenser G3, the fuel cooler N1, and the receiver G2 are collectively referred to as a cooling system equipment unit U2.

[0027] A hydraulic oil tank T2 and a control valve V1 are disposed in front of the cooling system equipment unit U2. The control valve V1 is attached to the front side of the hydraulic oil tank T2. The hydraulic oil tank T2 is a tank that stores hydraulic oil to be supplied to the hydraulic pump P1. The control valve V1 is a valve unit that aggregates each control valve that controls each hydraulic actuator equipped in the work machine 1. A battery BT1 is disposed in front of the control valve V1 and the hydraulic oil tank T2. The battery BT1 is a storage battery that supplies power to electrical equipment equipped in the work machine 1.

[0028] A controller 24B is disposed to the left of the control valve V1. This controller 24B is an electronic control unit called a prime mover ECU (engine ECU) that controls the prime mover E1. For example, the controller 24B controls the rotation speed of the prime mover E1 by controlling the operation of a supply pump, each injector, etc. to adjust the fuel injection amount. The controller 24B is configured using a microcomputer equipped with a CPU, EEPROM, etc.

[0029] The work machine 1 has an electronic control unit (controller) called a main ECU, which constitutes a control device together with the controller 24B and controls the overall operation of the work machine 1 (controls electrical equipment mounted on the work machine 1). For example, the main ECU controls a solenoid valve provided in a hydraulic circuit to control the flow rate of hydraulic oil and controls filter regeneration of the exhaust gas purification device D1.

[0030] As shown in Fig. 1, an air conditioner main body 136 is provided below the driver's seat 6 inside the cabin 5. The air conditioner main body 136 constitutes the main body of the air conditioner (air conditioner). The air conditioner main body 136 has a case and a blower, an evaporator, etc. housed in the case. The cooling system of the air conditioner has a compressor G1, a receiver G2, and a condenser G3. The heating system of the air conditioner uses heat from a prime mover E1.

[0031] 1 and 2, a weight 46 is provided at the rear of the fuselage 2. The weight 46 is disposed at the rear of the lower part of the prime mover E1 and covers the rear part of the lower part of the prime mover E1.

[0032] 2, the prime mover E1, the exhaust gas purification device D1, the hydraulic pump P1, the cooling fan F1, the compressor G1, etc. are covered by a bonnet 22. As shown in FIG.

[0033] 2, the battery BT1, control valve V1, hydraulic oil tank T2, controller 24B, radiator R1, oil cooler O1, receiver G2, and condenser G3 are covered by a side cover (cover body) 21. The side cover 21 is provided from the front to the rear of the right part of the fuselage 2, and covers the upper part of a revolving frame 41 described later. The side cover 21 is disposed to the side (right side) of the cabin 5.

[0034] 2 and 17, the right side of the bonnet 22 is connected to the rear part of the side cover 21. An opening is formed on the right side surface of the rear part of the side cover 21 to take in air into the rear part of the side cover 21 and the inside of the bonnet 22. The side cover 21 has a first cover member 26 and a second cover member 27.

[0035] As shown in Fig. 2, the first cover member 26 has an outer wall portion 26A and an upper wall portion 26B. A battery BT1, a control valve V1, a hydraulic oil tank T2, a radiator R1, an oil cooler O1, a receiver G2, and a condenser G3 are housed inside the first cover member 26. As shown in Figs. 2 and 17, the first cover member 26 has a side portion 26A and an upper portion 26B.

[0036] As shown in Fig. 2, the second cover member 27 is disposed between the first cover member 26 and the cabin 5. The controller 24B is housed in the second cover member 27. As shown in Fig. 17, the second cover member 27 has a peripheral wall portion 27a and a side wall portion 27b covering the side on the cabin 5 side. The second cover member 27 communicates with the inside of the first cover member 26.

[0037] As shown in FIG. 3 and FIG. 4, the machine body 2 has a revolving frame 41 that serves as a skeleton. The revolving frame 41 has a revolving base plate 42 that constitutes the bottom of the machine body 2, a reinforcing rib 43 that reinforces the revolving base plate 42, and a support bracket 18. The revolving frame 41 also has brackets, stays, and the like for mounting equipment, tanks, and other parts mounted on the machine body 2. The revolving base plate 42 is formed of a thick steel plate or the like. The brackets, stays, and the like provided on the revolving frame 41 are fixed to the revolving base plate 42 by welding. The revolving base plate 42 is supported on the traveling device 3 via a revolving bearing 8 so as to be rotatable about a vertical axis (revolving axis X1) (see FIG. 1). The rear end of the revolving base plate 42 is formed in a flat surface shape along the machine body width direction K2. In detail, the rear end of the revolving base plate 42 protrudes slightly rearward from the left and right sides at the center side in the machine body width direction K2.

[0038] The reinforcing rib 43 is provided on the swivel base plate 42 from the front (one end) to the rear (the other end). The reinforcing rib 43 is fixed to the swivel base plate 42 by welding, and reinforces the swivel base plate 42. The reinforcing rib 43 includes a first rib 43L provided on the left side of the swivel base plate 42 and a second rib 43R provided on the right side of the swivel base plate 42.

[0039] The first rib 43L has a front rib 232L and a rear rib 233L. The front rib 232L is a sheet metal rib (a rib made of sheet metal), and the rear rib 233L is a cast steel rib (a rib made of cast steel). The front rib 232L is vertically oriented (with the plate thickness direction aligned with the horizontal direction) and stands on the swivel base plate 42. The rear part of the front rib 232L and the front part of the rear rib 233L overlap in a side view and are fixed (connected) to each other by welding.

[0040] The second rib 43R has a front rib 232R and a rear rib (reinforcing member) 233R. The front rib 232R is a sheet metal rib, and the rear rib 233R is a cast steel rib. The front rib 232R is vertically oriented and stands on the swivel base plate 42. The rear part of the front rib 232R and the front part of the rear rib 233R overlap in a side view and are fixed (connected) to each other by welding. The rear end of the rear rib 233R is located rearward of the rear end of the rear rib 233L.

[0041] The support bracket 18 is fixed to the front part of the swivel base plate 42 by welding or the like, and is connected to the front parts of the reinforcing ribs 43 (the front parts of the front ribs 232L and 232R).

[0042] As shown in Figs. 3 and 4, a partition plate 47 is provided along the width direction K2 of the vehicle body near the rear of the center of the front-rear direction K1 of the rotating base plate 42. The partition plate 47 has a main partition plate 48 and a sub-partition plate 49. The main partition plate 48 extends in the width direction K2 of the vehicle body from the left side surface of the second rib 43R across the first rib 43L to the left end of the rotating base plate 42. The main partition plate 48 is fixed to the rotating base plate 42 by welding and erected. The sub-partition plate 49 is attached to the left part of the rotating base plate 42 by overlapping the back surface of the main partition plate 48. A prime mover E1 is mounted on the rotating base plate 42 behind the partition plate 47 (see Fig. 18).

[0043] At the rear of the swivel base plate 42, a first opening 31 and a second opening 32 are formed, each of which is formed by a substantially rectangular edge portion penetrating the swivel base plate 42. The first opening 31 and the second opening 32 exhaust the cooling air after cooling the prime mover E1. The first opening 31 is formed behind the main partition plate 48 and between the first rib 43L and the second rib 43R. A first cover plate 33 formed of a perforated plate having a large number of holes is disposed at the first opening 31 so as to cover the opening. The second opening 32 is formed to the left of the first opening 31 and to the left of the first rib 43L. A second cover plate 34 formed of a perforated plate having a large number of holes is disposed at the second opening 32 so as to cover the opening.

[0044] The swivel base plate 42 has a first opening hole (opening hole) 321 formed in a vertical penetrating manner at a front portion of the center portion in the front-rear direction K1 between the first rib 43L and the second rib 43R. The first opening hole 321 is formed in front of the main partition plate 48. The swivel base plate 42 also has a positioning hole 323L located on the left side of the first opening hole 321 and a positioning hole 323R located on the right side of the first opening hole 321. The positioning hole 323L and the positioning hole 323R are holes through which a jig (pin) for positioning the swivel base plate 42 is inserted when fixing a member on the swivel base plate 42 by welding. Furthermore, the swivel base plate 42 has a second opening hole 322 formed in a vertical penetrating manner at a front portion of the first opening hole 321. The second opening hole 322 is formed in a circular shape, and a motor mounting portion 324 is provided around the periphery. A swing motor M1 made of a hydraulic motor (see FIG. 3) is attached to the motor attachment portion 324. The swing motor M1 is a motor that drives the machine body 2 to rotate about the swing axis X1.

[0045] As shown in Figure 17, a weight 46 is provided below the rear of the bonnet 22. The rear of the revolving frame 41 is covered by this weight 46. A revolving cover (exterior member) 51 is provided on the left and right sides and front of the fuselage 2. The left and right sides and front of the revolving frame 41 are covered by this revolving cover 51. A step 52 is provided on the left side of the front part of the fuselage 2. The left side of the front part of the revolving frame 41 is covered by this step 52. The step 52 is attached to the revolving frame 41 and forms the floor surface of the cabin 5.

[0046] 5, the traveling frame 9 has a center frame 325, a first side frame 326L provided on the left side of the center frame 325, and a second side frame 326R provided on the right side of the center frame 325. The machine body 2 (revolving frame 41) is rotatably supported by the center frame 325 via a revolving bearing 8. The traveling mechanism 10 is mounted on the first side frame 326L and the second side frame 326R.

[0047] The center frame 325 has a central frame portion 327 and four support legs 328A to 328D extending from the central frame portion 327. The central frame portion 327 has a top plate 329 forming an upper surface of the central frame portion 327. The support legs 328A and 328B connect the central frame portion 327 to the first side frame 326L. The support legs 328C and 328D connect the central frame portion 327 to the second side frame 326R.

[0048] As shown in Fig. 5 and Fig. 7, the swivel bearing 8 has an outer race (outer ring) 8A, an inner race (inner ring) 8B provided on the inner periphery of the outer race 8A so as to be rotatable around the swivel axis X1 via balls, and an internally toothed gear 332 formed on the inner periphery of the inner race 8B. The outer race 8A is fixed to the swivel base plate 42 with bolts or the like. That is, the outer race 8A is attached to the machine body 2. The inner race 8B is fixed to a top plate 329 (center frame 325) with bolts or the like. That is, the inner race 8B is attached to the traveling device 3.

[0049] As shown in Fig. 7, a swivel pinion 333 is attached to the swivel motor M1. The swivel pinion 333 is disposed on the lower surface side of the swivel base plate 42 through the second opening hole 322 and meshes with the internal gear 332. The swivel pinion 333 is driven by the swivel motor M1 to rotate around the vertical axis. Therefore, when the swivel pinion 333 is rotationally driven by the swivel motor M1, the swivel pinion 333 moves in the circumferential direction of the swivel bearing 8 while meshing with the internal gear 332. This causes the machine body 2 to rotate around the swivel axis X1.

[0050] 6, a swivel joint 334 is disposed on the center side of the swivel bearing 8, i.e., at the position of the swivel axis X1. The swivel joint 334 is a rotary joint that enables the supply and discharge of hydraulic oil between the hydraulic actuator on the traveling device 3 side and the control valve V1 on the machine body 2 side.

[0051] As shown in FIG. 7, the swivel joint 334 has an outer sleeve 335 attached to the traveling device 3, an inner shaft 336 inserted into the outer sleeve 335 so as to be rotatable about the vertical axis, and a mounting wall 337.

[0052] The outer sleeve 335 is formed in a cylindrical shape and is disposed below the swivel base plate 42. The upper end of the outer sleeve 335 serves as a receiving portion 335a that supports the inner shaft 336. The lower end of the outer sleeve 335 is closed by a cover member 334A.

[0053] As shown in Fig. 9, the inner shaft 336 has an upper portion 336A located above the outer sleeve 335 and a lower portion 336B inserted into the outer sleeve 335. The upper portion 336A and the lower portion 336B are both formed in a cylindrical shape, and the upper portion 336A is formed to have a larger diameter than the lower portion 336B. The lower end (placement portion 336a) of the upper portion 336A abuts against a collar 346 that abuts on the receiving portion 335a. Thus, the inner shaft 336 has the placement portion 336a supported by the receiving portion 335a. The collar 346 is a member for allowing the inner shaft 336 to rotate smoothly relative to the outer sleeve 335.

[0054] As shown in FIG. 7, the rotation axis of the inner shaft 336 coincides with the pivot axis X1. An upper portion 336A of the inner shaft 336 is inserted through the first opening hole 321 and protrudes above the swivel base plate 42. A rod-shaped engagement member 338 is provided on the upper portion 336A of the inner shaft 336 so as to protrude radially outward (see FIG. 11). The engagement member 338 engages with the swivel base plate 42 (a locking member 344 described later) and rotates integrally with the swivel base plate 42. The engagement member 338 also restricts the rotation of the inner shaft 336 relative to the swivel frame 41. Therefore, the inner shaft 336 rotates integrally with the swivel base plate 42.

[0055] The mounting wall 337 includes a first mounting wall 337A and a second mounting wall 337B. The first mounting wall 337A and the second mounting wall 337B are integrally formed on the upper part of the outer sleeve 335. The first mounting wall 337A protrudes in one horizontal direction (forward) from the outer sleeve 335. The second mounting wall 337B protrudes in the other horizontal direction (rearward) from the outer sleeve 335, which is the opposite direction to the one horizontal direction. Note that at least one mounting wall 337 is sufficient.

[0056] 6, an inner race attachment portion 339 to which the inner race 8B of the swivel bearing 8 is attached is provided on the upper surface of the top plate 329. A plurality of bolt insertion holes 340, through which bolts for fixing the inner race 8B are inserted, are formed at intervals in the circumferential direction in the inner race attachment portion 339. The bolt insertion holes 340 are defined by an annular edge portion formed penetrating the top plate 329.

[0057] As shown in FIG. 6 and FIG. 7, the top plate 329 (traveling device 3) has a joint mounting portion 341 to which the swivel joint 334 is attached. The joint mounting portion 341 protrudes from the inner peripheral side of the swivel bearing 8 toward the swivel joint 334. More specifically, the joint mounting portion 341 extends horizontally from an inner peripheral edge 339a of the inner wheel mounting portion 339 toward the swivel axis X1. The joint mounting portion 341 includes a first wall portion 341A and a second wall portion 341B. The first wall portion 341A extends rearward from a front portion of the inner peripheral edge 339a of the inner wheel mounting portion 339. The second wall portion 341B extends forward from a rear portion of the inner peripheral edge 339a of the inner wheel mounting portion 339.

[0058] The inner peripheral side of the inner ring attachment portion 339 is open. More specifically, the top plate 329 has an opening 342 defined by an inner peripheral edge 339a of the inner ring attachment portion 339, an outer extension (an edge portion forming an outer shape) of the first wall portion 341A, and an outer extension of the second wall portion 341B.

[0059] 6 and 7, a first mounting wall 337A is placed on the extending end side 341a (the side of the rotation axis X1) of the first wall portion 341A. A second mounting wall 337B is placed on the extending end side 341a of the second wall portion 341B. The first mounting wall 337A is attached to the first wall portion 341A from below with bolts. The second mounting wall 337B is attached to the second wall portion 341B from below with bolts.

[0060] As shown in Fig. 8, the base 341b of the second wall 341B is formed so that its horizontal width (width in the aircraft body width direction K2) gradually becomes wider from the tip end (the end on the swivel joint 334 side) of the joint mounting part 341 toward the base end (the end on the inner wheel mounting part 339 side). The left and right edges of the base 341b are formed in a curved shape that is recessed toward the inside of the aircraft body. Similarly, the base 341b of the first wall 341A is also formed so that its width gradually becomes wider from the tip end toward the base end, and the left and right outer edges of the base 341b are formed in a curved shape that is recessed toward the inside of the aircraft body.

[0061] As shown in FIG. 10, a locking member 344 that engages with the engaging member 338 is provided on the upper surface of the swivel base plate 42. The locking member 344 is provided near the first opening hole 321 and has a fixed portion 344a that is fixed to the swivel base plate 42 by bolts 345A and 345B, and a locking portion 344b that protrudes from the fixed portion 344a toward the swivel joint 334 and locks the engaging member 338. The locking portion 344b has a locking groove 344c that is formed from the end portion on the swivel joint 334 side toward the radially outward direction of the swivel joint 334. The locking portion 334b ​​is formed in a bifurcated shape having a first portion 344d that forms one side of the locking groove 344c and a second portion 344e that forms the other side of the locking groove 344c.

[0062] 11, the first portion 344d and the second portion 344e protrude from the first opening hole 321 toward the swivel joint 334. The first opening hole 321 also has a portion 321b that protrudes in a curved shape toward the swivel joint 334 at the attachment position of the locking member 344.

[0063] The engaging member 338 is inserted into the engaging groove 344c (between the first portion 334d and the second portion 334e) and thereby engages with the engaging member 344. When the engaging member 338 engages with the engaging member 344, the inner shaft 336 rotates integrally with the swivel base plate .

[0064] As shown in Figs. 8 to 10, the work machine 1 has a blocking cover 343 that covers the gap between the first opening hole 321 and the swivel joint 334. The blocking cover 343 is formed separately from the swivel joint 334 and attached to the revolving frame 41. In this embodiment, the blocking cover 343 covers (blocks) the gap between the inner shaft 336 and the first opening hole 321. This blocking cover 343 can prevent foreign objects from falling between the swivel joint 334 (the inner shaft 336) and the revolving frame 41 (the edge portion 321a of the first opening hole 321). Furthermore, it is possible to prevent foreign objects such as soil, pebbles, and dirt that have fallen from the gap between the first opening hole 321 and the swivel joint 334 from moving (rolling) along the joint mounting portion 341 to the internal gear 332 and from being caught between the internal gear 332 and the revolving pinion 333.

[0065] As shown in Fig. 10, the blocking cover 343 has a main cover 347 and a seal member 348. The main cover 347 has a cover plate 349 and an auxiliary cover 350. The cover plate 349 is attached to the swivel base plate 42 by a plurality of bolts 351A to 351D. As shown in Fig. 11, the cover plate 349 has a notched edge portion 352 that faces an outer circumferential surface 336b of the inner shaft 336 (swivel joint 334) with a gap therebetween, and covers the first opening hole 321. The notched edge portion 352 is formed in a curved shape that follows the outer circumferential surface 336b of the inner shaft 336.

[0066] As shown in FIG. 11 , the inner shaft 336 has a connection portion 364 to which a pipe fitting 353 selectively attached to the inner shaft 336 can be connected. The cover plate 349 has a notch groove 354 for avoiding interference with the pipe fitting 353 when the pipe fitting 353 is connected. The notch groove 354 is formed from the notch edge portion 352 toward the radially outward direction of the swivel joint 334, and is formed continuously with the notch edge portion 352. The notch groove 354 is covered by an auxiliary cover 350. The auxiliary cover 350 is formed of a plate material having a thickness greater than that of the cover plate 349. In the case of a standard specification working machine 1, the auxiliary cover 350 is fixed to the cover plate 349 by welding or the like, and is not attached to the cover plate 349 when a hydraulic actuator other than the hydraulic actuator that is equipped as standard on the working machine 1 is provided as an option.

[0067] As shown in FIG. 10 and FIG. 11, the cover plate 349 has a first plate material 355 and a second plate material 356, and is formed in a divided shape. The first plate material 355 and the second plate material 356 are arranged to sandwich the inner shaft 336 (swivel joint 334). The first plate material 355 is attached by bolts 351A and 351B. The second plate material 356 is attached by bolts 351C and 351D. The cutout edge portion 352 is composed of a first cutout edge portion 352A formed in the first plate material 355 and a second cutout edge portion 352A formed in the second plate material 356. The cutout groove 354 is formed in the first plate material 355.

[0068] As shown in FIG. 11, the first plate material 355 has an edge portion (first edge portion) 355a on one end side in a circumferential direction (referred to as the circumferential direction) C6 about the rotation axis X1, and an edge portion 355b on the other end side in the circumferential direction C6. The second plate material 356 also has an edge portion (second edge portion) 356a on one end side in the circumferential direction C6, and an edge portion 356b on the other end side in the circumferential direction C6. The edge portion 355a faces the locking member 344 closely in the circumferential direction C6. The edge portion 356a also faces the locking member 344 closely in the circumferential direction C6. The locking member 344 is sandwiched between the edge portion 355a and the edge portion 356a. Therefore, the second plate material 356 has a second edge portion 356a that sandwiches the locking member 344 with the first edge portion 355a in the circumferential direction C6. The edge portion 355b and the edge portion 356b abut against each other in the circumferential direction C6.

[0069] 11, the first plate material 355 has a first extension portion 355c that covers the first positioning hole 357A, and the second plate material 356 has a second extension portion 356c that covers the second positioning hole 357B.

[0070] As shown in FIG. 9, the seal member 348 protrudes from the notch edge portion 352 toward the outer peripheral surface 336b of the inner shaft 336 and abuts against the outer peripheral surface 336b. The seal member 348 is provided in the notch edge portion 352 in the circumferential direction C6 from the edge portion 355a through the edge portion 355b and the edge portion 356b to the edge portion 356a. Therefore, the seal member 348 covers the gap between the notch edge portion 352 and the swivel joint 334. The seal member 348 has a base portion 348a fitted in the notch edge portion 352 and a hollow abutment portion 348b abutting against the outer peripheral surface 336b. The seal member 348 has a first seal member 348A attached to the first plate member 355 and a second seal member 348B attached to the second plate member 356, and is formed in a divided shape.

[0071] As described above, the blocking cover 343 is divided into a member including the first plate material 355 and the first seal material 348A, and a member including the second plate material 356 and the second seal material 348B. By configuring the blocking cover 343 in a divided form, the blocking cover 343 can be attached to the turning base plate 42 in a state in which the swivel joint 334 is assembled to the traveling device 3 and the turning frame 41 is assembled to the traveling device 3, and therefore, assembling is easy.

[0072] 9, the swivel joint 334 includes a seal cover 358 that covers the gap between the receiving portion 335a and the mounting portion 336a. The seal cover 358 is formed in an annular shape that generally surrounds the inner shaft 336 in the circumferential direction.

[0073] As shown in FIG. 9, the seal cover 358 is provided at the lower end of the upper portion 336A of the inner shaft 336. The seal cover 358 has a base portion 358a, an extension portion 358b, and a protrusion portion 358c. The base portion 358a is located above the collar 346 and covers the upper portion of the collar 346. The base portion 358a surrounds the outer periphery of the upper portion 336A and abuts (closely contacts) the outer periphery. The upper surface of the base portion 358a is formed in an inclined shape that transitions downward as it goes radially outward. The extension portion 358b extends downward from the outer periphery end portion of the base portion 358a and covers the outer periphery of the collar 346 and the receiving portion 355a. These base portion 358a and extension portion 358b prevent foreign matter such as dirt, water, oil, etc. from entering into the swivel joint 334 through the joint between the inner shaft 336 and the outer sleeve 335 (between the receiving portion 335a and the mounting portion 336a).

[0074] The protrusion 358c protrudes from the inner circumferential surface of the base 358a and fits into a circumferential groove 359 formed in the outer circumferential surface 336b of the inner shaft 336. This prevents the seal cover 358 from coming off and attaches it to the inner shaft 336.

[0075] As shown in Figures 3 and 4, a weight mounting body 360 to which the weight 46 is attached and supported is provided at the rear of the swivel base plate 42. The weight mounting body 360 is formed from general structural rolled steel (SS material). The weight mounting body 360 has a first weight mounting portion (also called a weight support) 44 and a second weight mounting portion (also called a weight support member) 45.

[0076] The weight support 44 is formed of a thick plate material having a thickness greater than that of the swivel base plate 42. A thick plate material having a thickness greater than that of the swivel base plate 42 means that the maximum plate thickness of the weight support 44 is greater than the maximum plate thickness of the swivel base plate 42. In this embodiment, the plate thickness (dimension in the vertical direction) of the weight support 44 is formed to be approximately four times that of the swivel base plate 42. Furthermore, the plate thickness of the weight support 44 is not limited, but is preferably 2.5 times or more that of the swivel base plate 42.

[0077] As shown in FIG. 12, the weight support 44 is formed in the shape of a block of a thick plate that is long in the width direction K2 of the machine body. The weight support 44 is formed to a length that extends from one side to the other side of the rear of the rotating base plate 42 in the width direction K2 of the machine body. The back surface and the upper surface of the weight support 44 are formed in a flat surface shape along the width direction K2 of the machine body and in a uniform flat surface in the width direction K2 of the machine body. The plate width (dimension in the front-rear direction) of the weight support 44 is formed such that the left part 44a and the central part 44c are wide, and the right part 44b is narrower than the left part 44a and the central part 44c. The front surface of the weight support 44, between the central part 44c and the right part 44b, is formed as an inclined surface 44d that transitions rearward as it goes rightward. The front part of the weight support 44 except for the inclined surface 44d is formed as a flat surface along the width direction K2 of the machine body. The weight support 44 is fixed to the pivot base plate 42 by welding.

[0078] The rear rib 233L of the first rib 43L is connected to the left portion 44a of the weight support 44. The rear rib 233R of the second rib 43R is connected to the right portion 44b of the weight support 44.

[0079] In addition, since the right portion 44b of the weight support 44 is formed in a straight shape, there is a good yield when forming the weight support 44. That is, when forming two weight supports 44 from a single plate material, by cutting out the plate material so that the right portions 44b face each other, there is a good yield.

[0080] As shown in FIG. 13, the weight support 44 has a weight support surface 361 on which the weight 46 is placed and supported, and a mounting hole (referred to as a first mounting hole) 362 for mounting the weight 46. The weight support surface 361 includes a first support surface 361L provided on one side (left side) of the weight support 44 in the body width direction K2, and a second support surface 361R provided on the other side (right side) in the body width direction K2. The first mounting portion 46L on the left side of the weight 46 is placed on the first support surface 361L. The second mounting portion 46R on the right side of the weight 46 is placed on the second support surface 361R. The weight 46 is placed on the weight support 44 in a state where it is lifted from the swivel base plate 42.

[0081] The first mounting hole 362 is a screw hole into which a bolt (referred to as a first mounting bolt) 363 for mounting the weight 46 is screwed (horizontally) penetrating the weight 46 from the rear side. The screw hole is a cylindrical hole with a female screw formed on the inner peripheral surface.

[0082] As shown in FIG. 13, the first mounting hole 362 includes a first screw hole 362A provided on one side (left side) of the weight support 44 in the body width direction K2, and a second screw hole 362B provided on the other side in the body width direction K2.

[0083] The first mounting bolt 363 includes a first bolt 363A (see Figure 15) that penetrates the weight 46 from the rear in the fore-and-aft direction K1 and is screwed into the first screw hole 362A, and a second bolt 363B (see Figure 16) that penetrates the weight 46 from the rear in the fore-and-aft direction K1 and is screwed into the second screw hole 362B.

[0084] As shown in Fig. 3, the weight support member 45 is formed in a rectangular column shape, and is arranged substantially in the center in the machine body width direction K2 at the rear of the swivel base plate 42, and stands on the weight support 44. The weight support member 45 is fixed to the weight support 44 by welding. As shown in Fig. 13, the weight support member 45 has an attachment hole (referred to as a second attachment hole) 366 in the upper part of the back surface.

[0085] 4, the second mounting hole 366 is a screw hole into which a bolt (referred to as a second mounting bolt) 365 is screwed. The second mounting bolt 365 penetrates the weight 46 from the rear in the front-rear direction K1 (horizontal direction) and is screwed into the third mounting hole 366.

[0086] As described above, weight 46 is mounted on weight support 44, which is a thick plate having a greater thickness than swivel base plate 42, and is attached to weight mounting body 360 by first bolt 363A, second bolt 363B, and second mounting bolt 365. By supporting the load of weight 46 by first support surface 361L and second support surface 361R of thick plate weight support 44, it is possible to suppress shear stress from being applied to first mounting bolt 363 (first bolt 363A, second bolt 363B) and second mounting bolt 365, compared to the case where the load of weight 46 is supported by swivel base plate 42.

[0087] In addition, since the weight support surface 361 for supporting the weight 46 can be formed on the weight support 44 made of a thick plate without distortion, it is possible to improve the accuracy of the height of the weight 46. Also, the assembly accuracy of the weight 46 in the width direction K2 of the aircraft is improved (tilt of the weight 46 in the width direction K2 of the aircraft can be prevented), the fitting of the bonnet rear portion 22B described later is improved, and fitting adjustment of the bonnet rear portion 22B can be omitted.

[0088] Furthermore, by providing the weight support 44 made of a thick steel plate, since steel has a greater specific gravity than cast iron, the weight support 44 can function as a part of the counterweight, and the weight 46 can be made smaller.

[0089] The thickness of the weight support 44 is not particularly limited, but in order to adequately obtain the above-mentioned effects, it is preferable that the thickness is 50 mm or more, and more preferably 70 mm or more.

[0090] 3, a first support base 50A and a second support base 50B are provided on the swivel base plate 42 and behind the partition plate, and a third support base 50C and a fourth support base 50D are provided on the weight support 44. These first support base 50A to fourth support base 50D are support bases that support the prime mover E1. The prime mover E1 is supported on these support bases via vibration-proof members.

[0091] 4, the revolving frame 41 is provided with a first frame mounting portion 55A, a second frame mounting portion 55B, a third frame mounting portion 55C, and a fourth frame mounting portion 55D. The first frame mounting portion 55A to the fourth frame mounting portion 55D are frame mounting portions to which a support frame 11, which will be described later, is attached.

[0092] The first frame mounting portion 55A is fixed to the left portion of the upper end of the main partition plate 48. The second frame mounting portion 55B is fixed to the right portion of the upper end of the main partition plate 48. The third frame mounting portion 55C is disposed on the left side of the weight support 44 and stands on the swivel base plate 42. The fourth frame mounting portion 55D stands on the right portion of the weight support 44.

[0093] As shown in Fig. 18, the prime mover E1 is covered by a bonnet 22. The bonnet 22 forms a prime mover chamber E2 that houses the prime mover E1. The prime mover chamber E2 is formed on a rotating base plate 42. An exhaust gas purification device D1 is provided in the prime mover chamber E2.

[0094] The bonnet 22 has a partition member (partition plate) 22A that covers the front (upper front) of the prime mover E1, and a bonnet rear part 22B that covers the rear of the prime mover E1. A support frame 11 that supports the bonnet 22 is provided inside the bonnet 22. This support frame 11 is erected on the aircraft body 2 (swivel frame 41). The partition member 22A is a member that separates the prime mover chamber E2 from the side where the driver's seat 6 is arranged (the area on the driver's seat 6 side from the prime mover chamber E2). In other words, the partition member 22A is a member that separates the prime mover chamber E2 from the interior of the cabin 5. The partition member 22A is made of, for example, sheet metal. By forming the partition member 22A from sheet metal, sound insulation is improved compared to a partition member made of resin. In addition, a support bracket that supports wiring parts such as a harness can be easily attached to the partition member 22A by welding, screwing, or the like. In addition, the partition member 22A can improve the strength of the airframe 2. The partition member 22A is fixed to the support frame 11. A partition plate 47 is provided below the partition member 22A. The partition plate 47 separates the lower front part of the engine room E2. The bonnet rear part 22B is supported by the support frame 11 so as to be swingable up and down, and swings up and down to open and close the engine room E2. In detail, the bonnet rear part 22B has an upper front part supported by the support frame 11 so as to be rotatable around an axis extending in the width direction K2 of the airframe, and swings upward to open the engine room E2, so that the upper rear side of the engine room E2 becomes open. The weight 46 is disposed below the bonnet rear part 22B, and the rear part of the lower part of the engine E1 is covered by the weight 46.

[0095] As shown in FIG. 17, the space between the left end portions of the partition member 22A and the rear bonnet portion 22B is open toward the outside of the aircraft, and this open portion is blocked by the rear lower portion of the left side of the cabin 5, as shown in FIG.

[0096] The right end portion between the partition member 22A and the bonnet rear portion 22B is also open. As described above, the right side of the bonnet 22 is connected to the rear portion of the side cover 21, and the cooling fan F1 draws outside air into the motor chamber E2.

[0097] The support frame 11 is attached to a plurality of frame attachment portions (first frame attachment portion 55A to fourth frame attachment portion 55D) shown in FIG.

[0098] 19, the support frame 11 has a plurality of legs (first front leg 57L, second front leg 57R, first rear leg 58L, second rear leg 58R) and an upper plate 59. The plurality of legs and the upper plate 59 are formed of plate material.

[0099] The first front leg 57L and the second front leg 57R are disposed on the front side of the prime mover E1. The first front leg 57L and the second front leg 57R are disposed at an interval in the width direction K2 of the aircraft. In addition, the first front leg 57L and the second front leg 57R are disposed so that the plate thickness direction coincides with the width direction K2 of the aircraft.

[0100] 19, a first front mounting plate 60L is fixed to the lower end of the first front leg 57L with a bolt to the first frame mounting part 55A. A second front mounting plate 60R is fixed to the lower end of the second front leg 57R with a bolt to the second frame mounting part 55B. The first front mounting plate 60L and the second front mounting plate 60R are connected by a connecting plate 64.

[0101] As shown in Fig. 19, upper plate 59 is fixed to upper portion 62b of first front leg 57L and upper portion 63b of second front leg 57R. As shown in Fig. 18, the upper space between partition member 22A and bonnet rear portion 22B is blocked by upper plate 59 and cover plate 20 provided on the rear end side of upper plate 59 so as to protrude upward.

[0102] The first rear leg 58L and the second rear leg 58R are disposed on the rear side of the prime mover E1. As shown in FIG. 19, the first rear leg 58L and the second rear leg 58R are disposed at an interval in the vehicle width direction K2. The first rear leg 58L and the second rear leg 57R are disposed with their plate width directions aligned with the vehicle width direction K2. The upper part of the first rear leg 58L is attached to a mounting member 65 fixed to the left side of the upper plate 59. A first rear mounting plate 61L is fixed to the lower end of the first rear leg 58L by bolts to the third frame mounting portion 55C. The upper part of the second rear leg 58R is fixed to the lower surface of the upper plate 59. A second rear mounting plate 61R is fixed to the lower end of the second rear leg 58R by bolts to the fourth frame mounting portion 55D.

[0103] In addition, the number of rear legs may be one. That is, the support frame 11 has two front legs and at least one rear leg.

[0104] The weight of the support frame 11 can be reduced by fixing a sheet metal partition member 22A across the first front leg 57L and the second front leg 57R to increase the strength of the support frame 11 in the aircraft width direction K2, and by aligning the plate thickness direction of the first front leg 57L and the second front leg 57R with the aircraft width direction K2 to increase the strength in the fore-and-aft direction K1.

[0105] 18, the driver's seat 6 is disposed in front of the partition member 22A. That is, the driver's seat 6 is mounted in front of the prime mover E1 and at the rear of the step 52.

[0106] As shown in Fig. 20, a left console 79L is provided on the left side of the driver's seat 6. An unload lever 76, a left operating lever 77L, a left armrest 78L, etc. are provided on the console 79L. A right console 79R is provided on the right side of the driver's seat 6. A right operating lever 77R, a right armrest 78R, and a dozer lever (lever) 80 are provided on the console 79R.

[0107] The operator's seat 6 has a seat portion 6A for supporting the buttocks of the operator, and a backrest portion 6B for supporting the back of the operator.

[0108] The unload lever 76 is a lever that switches between a state in which the supply of hydraulic oil to hydraulic equipment (for example, a hydraulic cylinder that drives the working device 4 and a swing motor M1 that swings the machine body 2) is permitted and a state in which the supply of hydraulic oil to the hydraulic equipment is not permitted. When the unload lever 76 is in the state shown in FIG. 20, the supply of hydraulic oil to the hydraulic equipment is permitted, and when the unload lever 76 is swung upward from this state, the supply of hydraulic oil to the hydraulic equipment is not permitted. When the unload lever 76 is swung upward, the console 79L swings upward with the lower part of the rear part as a fulcrum. This makes it easier for the operator to get on and off the vehicle without the operation lever 77L and the console 79L interfering with the operator getting on and off the vehicle. As shown in FIG. 1, the cabin 5 has an entrance 29 on the left side for the operator to get on and off the vehicle, and the entrance 29 can be opened and closed by a door 28.

[0109] The operating lever 77L can operate two operation targets, for example, the rotation operation of the machine body 2 and the swing operation of the arm 16. The operating lever 77R can also operate two operation targets, for example, the swing operation of the boom 15 and the swing operation of the bucket 17. The operating lever 77L operates a pilot valve arranged in front of the console 79L to operate the machine body 2 and the arm 16. The operating lever 77R operates a pilot valve arranged in front of the console 79R to operate the boom 15 and the bucket 17.

[0110] The dozer lever 80 is a lever that operates the dozer device 7. The dozer lever 80 operates the dozer device 7 by operating a pilot valve that is disposed in the middle of the console 79R.

[0111] The pilot valves operated by the operating levers 77L, 77R and the dozer lever 80 are connected to the control valve V1 via hydraulic hoses, hydraulic joints and the like.

[0112] As shown in Figures 21 and 22, a support base 83 is provided below the driver's seat 6. The support base 83 is attached to the step 52 (machine body 2). A movable body 85 is supported on the support base 83 via a first rail device (rail device) 84 so that its front-rear position can be adjusted. The first rail device 84 includes a left first slide rail 84L and a right first slide rail 84R.

[0113] The driver's seat 6 is supported on the movable body 85 so that its front-rear position can be adjusted via a second rail device (another rail device) 86. The second rail device 86 includes a left second slide rail 86L and a right second slide rail 86R.

[0114] The movable body 85 has a slide frame 87 attached to the support base 83 via first slide rails 84L, 84R, and a suspension 88 attached to the slide frame 87. The slide frame 87 has a first attachment portion 87A to which the suspension 88 is attached, a second attachment portion 87L extending leftward from the first attachment portion 87A, and a third attachment portion 87R extending rightward from the first attachment portion 87A. A console 79L is attached to the second attachment portion 87L, and a console 79R is attached to the third attachment portion 87R.

[0115] The operator's seat 6 is attached to the suspension 88 via second slide rails 86L, ​​86R. The suspension 88 is a shock-absorbing device that supports the load of the operator acting on the operator's seat 6 and reduces the transmission of vibrations and shocks from below to the operator's seat 6. The suspension 88 may also have a height adjustment mechanism that adjusts the height of the operator's seat 6.

[0116] As shown in Fig. 23, the first slide rails 84L, 84R are formed to be long in the front-rear direction K1, and have a lower rail 89 and an upper rail 90. As shown in Fig. 24, the lower rail 89 is attached to the support base 83. The upper rail 90 is fitted into the lower rail 89 so as to be movable in the front-rear direction K1, and is also attached to the slide frame 87. This allows the movable body 85 to move in the front-rear direction K1 relative to the support base 83.

[0117] As shown in FIG. 25, a restricting member 93 is attached to the front portion of the upper rail 90, which restricts rearward movement of the upper rail 90 relative to the lower rail 89 by abutting against the front end of the lower rail 89.

[0118] As shown in Fig. 26, the lower rail 89 has multiple engagement portions 91A spaced apart in the front-rear direction K1 and formed from the front to the rear. As shown in Fig. 24, an engagement member 92A that engages with the engagement portions 91A is provided in the upper rail 90. When the engagement member 92A is engaged with the engagement portion 91A, forward and rearward movement of the upper rail 90 relative to the lower rail 89 is restricted (the first slide rails 84L, 84R are locked).

[0119] As shown in Fig. 23, an operating rod 94 is attached to the upper rail 90. One end 94a of the operating rod 94 is attached to the upper rail 90 of the left first slide rail 84L, and the other end 94b is attached to the upper rail 90 of the right first slide rail 84L. The operating rod 94 is linked to an engaging member 92A, and by pulling up the operating rod 94, the engaging member 92A moves away from the engaging portion 91A. This allows the upper rail 90 to move forward and backward relative to the lower rail 89. When the operating force of the operating rod 94 is released, the operating rod 94 is pulled downward by the biasing force of the spring, and the engaging member 92A engages with the engaging portion 91A.

[0120] As shown in Fig. 27, the second slide rails 86L, ​​86R are formed to be long in the front-rear direction K1, and have a lower rail 95 and an upper rail 96. As shown in Fig. 24, the lower rail 95 is attached to a suspension 88. The upper rail 96 is fitted into the lower rail 95 so as to be movable in the front-rear direction K1, and is also attached to the driver's seat 6. This allows the driver's seat 6 to move in the front-rear direction K1 relative to the movable body 85.

[0121] As shown in Fig. 26, the lower rail 95 has multiple engagement portions 91B spaced apart in the front-rear direction K1 and formed from the front to the rear. As shown in Fig. 24, an engagement member 92B that engages with the engagement portions 91B is provided in the upper rail 96. When the engagement member 92B is engaged with the engagement portion 91B, forward / rear movement of the upper rail 96 relative to the lower rail 95 is restricted (the second slide rails 86L, ​​86R are locked).

[0122] As shown in Fig. 27, an operating rod 97 is attached to the upper rail 96. One end 97a of the operating rod 97 is attached to the upper rail 96 of the left first slide rail 84L, and the other end 97b is attached to the upper rail 96 of the right first slide rail 84L. The operating rod 97 is linked to an engaging member 92B, and by pulling up the operating rod 97, the engaging member 92B moves away from the engaging portion 91B. This allows the upper rail 96 to move forward and backward relative to the lower rail 95. When the operating force of the operating rod 97 is released, the operating rod 97 is pulled downward by the biasing force of the spring, and the engaging member 92B engages with the engaging portion 91B.

[0123] By adjusting the position of the driver's seat 6 in the front-rear direction K1 relative to the movable body 85, the positional relationship in the front-rear direction K1 between the operator and the operation levers 77L, 77R can be adjusted. This allows the position of the driver's seat 6 to be set in a state where the operator can operate the operation levers 77L, 77R in a position that allows comfortable bending of the elbows. In addition, by adjusting the position of the movable body 85 in the front-rear direction, the front-rear position of the driver's seat 6 can be adjusted while maintaining the positional relationship in the front-rear direction K1 between the operator and the operation levers 77L, 77R.

[0124] As shown in Fig. 21, a stopper 98 is provided at the rear of the driver's seat 6. A contact member 99 with which the stopper 98 can come into contact is provided behind the stopper 98. The stopper 98 comes into contact with the contact member 99, thereby restricting the rearward movement of the driver's seat 6. In addition, the stopper 98 comes into contact with the contact member 99 before the driver's seat 6 interferes with the partition member 22A. This makes it possible to prevent the driver's seat 6 from interfering with the partition member 22A.

[0125] As shown in Fig. 28, the stopper 98 is attached to a support bracket 100 attached to a seat frame 6C forming the framework of the driver's seat 6 so that its position can be adjusted in the front-rear direction K1. The stopper 98 has a contact portion 98a that contacts the contact member 99 and a screw shaft 98b that protrudes forward from the contact portion 98a. The screw shaft 98b is a rod member having a male screw formed on the outer circumferential surface thereof. Specifically, the screw shaft 98b is formed of a bolt, and the head of the bolt is embedded in the contact portion 98a.

[0126] The support bracket 100 has a first portion 100a attached to the seat frame 6C and a second portion 100b extending upward from the rear end of the first portion 100a. The second portion 100b has a screw hole 102 having an axis in the front-rear direction K1. The screw hole 102 is a through hole formed by penetrating the support bracket 100, and a female screw is formed on the inner peripheral surface of the through hole. A screw shaft 98b is screwed into the screw hole 102. The position of the stopper 98 can be adjusted in the front-rear direction K1 with respect to the abutment member 99 by screwing the screw shaft 98b forward (threading) or backward (loosening). A lock nut 101 that fixes the position of the stopper 98 is screwed into the screw shaft 98b.

[0127] As shown in FIG. 22, in this embodiment, the stopper 98 includes a first stopper 98L provided on the left rear of the seat portion 6A, and a second stopper 98R provided on the right rear of the seat portion 6A.

[0128] When the movable body 85 is moved to the rear end of the movement region and the stopper 98 is not in contact with the abutment member 99, the restricting member 93 restricts the rearward movement of the movable body 85 and the driver's seat 6. When the movable body 85 is moved to the rear end of the movement region and the stopper 98 is in contact with the abutment member 99, the stopper 98 restricts the rearward movement of the movable body 85 and the driver's seat 6. When only the driver's seat 6 is moved rearward, the stopper 98 restricts the rearward movement of the driver's seat 6. That is, the stopper 98 performs position restriction both when the movable body 85 is moved rearward and when only the driver's seat 6 is moved rearward.

[0129] When the movable body 85 is moved to the rear end side of the movement range and the rearward movement of the stopper 98 is restricted by the abutment member 99, the driver's seat 6 has a margin that allows it to be adjusted rearward with respect to the movable body 85. Therefore, when the movable body 85 is moved forward from this state, the driver's seat 6 can be moved rearward. By moving the driver's seat 6 rearward, the distance in the front-rear direction between the operation levers 77L, 77R and the driver's seat 6 can be increased. This allows the operator to assume a comfortable posture (with arms moderately extended and elbows not bent too much) that makes it easy to operate the operation levers 77L, 77R when driving.

[0130] Furthermore, when the operator gets on or off, the driver's seat 6 and the movable body 85 can be brought close to the partition member 22A by adjusting the front-to-rear position of the driver's seat 6 relative to the movable body 85 so that the stopper 98 comes into contact with the abutment member 99 with the movable body 85 moved to the rear end side of the movement region. In other words, when getting on or off, the driver's seat 6 and the operating lever 77L can be slid close to the partition member 22A so that the operating lever 77L does not get in the way.

[0131] Furthermore, after the movable body 85 is moved rearward and the stopper 98 abuts against the abutment member 99, the first slide rails 84L, 84R are locked so as to be unable to move forward or backward in a state in which a gap is formed between the stopper 98 and the abutment member 99. That is, when the stopper 98 abuts against the abutment member 99, the engaging member 92A does not engage with the engaging portion 91A, and when the movable body 85 is moved slightly forward from the state in which the stopper 98 abuts against the abutment member 99, the engaging member 92A engages with the engaging portion 91A, and the first slide rails 84L, 84R are locked.

[0132] Since the driver's seat 6 is supported by the suspension 88, when an operator sits in the driver's seat 6 or when the machine body 2 vibrates up and down, the machine body 2 and the driver's seat 6 move vertically relative to each other. When the first slide rails 84L, 84R are locked with the stopper 98 in abutment with the abutment member 99, the stopper 98 and the abutment member 99 rub against each other. Therefore, by providing a gap between the stopper 98 and the abutment member 99, it is possible to prevent the stopper 98 and the abutment member 99 from rubbing against each other.

[0133] Furthermore, for the same reason as above, after the stopper 98 abuts against the abutment member 99, the second slide rails 86L, ​​86R are locked so as to be unable to move forward or backward with a gap being created between the stopper 98 and the abutment member 99.

[0134] 29, a plurality of hydraulic hoses 368 are arranged on the back side of the movable body 85. The plurality of hydraulic hoses 368 include a hydraulic hose arranged from a pilot valve operated by an operating lever 77L to a control valve V1, a hydraulic hose connecting the pilot valve and the hydraulic pump side, a hydraulic hose connecting the pilot valve and the hydraulic oil tank side, etc. The plurality of hydraulic hoses 368 are arranged on the back side of the lower part of the suspension 88 and across the upper part of the second rail device 86 from left to right.

[0135] As shown in Fig. 18, the front surface of the first front leg 57L is in face-to-face contact with the rear surface of the left part of the partition member 22A and is fixed thereto by welding or the like. As shown in Fig. 30, the second front leg 57R is disposed on the right side of the partition member 22A. The second front leg 57R is disposed closer to the front than the first front leg 57L, and the right end of the partition member 22A is fixed to the left side surface of the second front leg 57R by welding.

[0136] As shown in FIG. 30 and FIG. 33, the partition member 22A has a partition body 67 that essentially separates the interior of the cabin 5 from the motor room E2, an upper extension portion 68 that extends rearward from the upper end of the partition body 67, and a lower extension portion 69 that extends forward from the lower end of the partition body 67. The partition body 67 has a first portion 67A on the upper side and a second portion 67B on the lower side. The first portion 67A and the second portion 67B are formed in an inclined shape that transitions rearward as it goes upward. The first portion 67A is inclined relative to the second portion 67B in an inclined shape that transitions rearward as it goes upward from the upper end of the second portion 67B. That is, the inclination angle of the first portion 67A and the second portion 67B with respect to the vertical direction is larger than that of the second portion 67B. Therefore, the partition member 22A is bent at a midpoint in the vertical direction. The left portion of the upper extension 68 is fixed onto the upper portion 62b of the first front leg 57L by welding.

[0137] As shown in Figures 30, 31 and 32, the partition member 22A has an inspection opening 71 for accessing parts and the like in the motor compartment E2, and a blocking plate 72 that blocks the inspection opening 71 from the front side. The inspection opening 71 is formed in the partition main body 67. More specifically, the inspection opening 71 is formed penetrating the first portion 67A. The inspection opening 71 is also formed from one side to the other side of the first portion 67A in the aircraft width direction K2. The blocking plate 72 is fixed to the first portion 67A from the front side with bolts.

[0138] 31, a plurality of plate attachment portions 371 and a seal material (called edge seal) 372 are provided around the inspection opening 71 in the first portion 67A (partition wall main body 67). The edge seal 372 is provided in a range excluding the plate attachment portion 371.

[0139] 34, the outer periphery of the closure plate 72 abuts against the edge seal 372. The edge seal 372 provides a seal between the seal abutment surface 22a around the inspection opening 71 in the partition body 67 and the outer periphery of the closure plate 72 that corresponds to the seal abutment surface 22a.

[0140] As shown in Fig. 35, the plate mounting portion 371 is pushed forward and formed in a stepped shape when the partition member 22A is formed by press molding. That is, the plate mounting portion 371 is integrally formed with the partition main body 67 (partition member 22A) such that a plate contact surface 371a with which the closing plate 72 abuts is located forward of the seal contact surface 22a. A nut member 373 is fixed to the back side of the plate mounting portion 371. The closing plate 72 is attached to the partition main body 67 by a fixing bolt 374 that penetrates the closing plate 72 and the plate mounting portion 371 and is screwed (screwed) into the nut member 373.

[0141] As shown in Figures 30 and 32, the closing plate 72 is provided with an abutment member 99 against which a stopper 98 of the driver's seat 6 abuts. The abutment member 99 is attached to the front side of the closing plate 72 by welding or the like. The abutment member 99 includes a first abutment member 99L provided on the left part of the upper part of the partition member 22A and a second abutment member 99R provided on the right part of the upper part of the partition member 22A. The first stopper 98L abuts against the first abutment member 99L, and the second stopper 98R abuts against the second abutment member 99R.

[0142] As shown in FIG. 33, the abutment member 99 has an abutment plate 99a and an attachment piece 99b fixed to the back surface of the abutment plate 99a. The attachment piece 99b is fixed to the closure plate 72 by welding. The abutment plate 99a is formed vertically long from the top to the bottom. Being vertically long means that the length in the up-down direction is longer than the width in the fuselage width direction K2. The front surface of the abutment plate 99a is the abutment surface with which the stopper 98 abuts, and is a vertical surface (surface along the vertical direction). By forming the abutment plate 99a (abutment member 99) vertically long, it is possible to accommodate the sinking of the driver's seat 6 and the height adjustment of the driver's seat 6.

[0143] As shown in Fig. 32, the left edge of the inspection opening 71 in the width direction K2 of the aircraft is located outside the aircraft from the first contact member 99L, and the right edge of the inspection opening 71 in the width direction K2 of the aircraft is located outside the aircraft from the second contact member 99L. That is, the opening width W3 of the inspection opening 71 in the width direction K2 of the aircraft is wider than the width W4 of the first contact member 99L and the second contact member 99R in the width direction K2 of the aircraft, and the inspection opening 71 has a large opening area. In this embodiment, the width W4 is the dimension between the end of the contact plate 99a of the first contact member 99L on the outer side of the aircraft and the end of the contact plate 99a of the second contact member 99R on the outer side of the aircraft.

[0144] As shown in Figures 30 and 32, the partition member 22A has an avoidance recess 108 on its upper portion to avoid interference with the second rail device 86. The avoidance recess 108 is provided in the closing plate 72. The avoidance recess 108 is disposed between the first contact member 99L and the second contact member 99R. In detail, the avoidance recess 108 includes a left recess 108L provided in the vicinity of the first contact member 99L on the inside of the machine body, and a right recess 108R provided in the vicinity of the second contact member 99R on the inside of the machine body.

[0145] As shown in FIG. 36, the recess 108L is formed in the cover plate 106L that closes the insertion hole 105L formed by penetrating the partition body 67. The recess 108R is formed in the cover plate 106R that closes the insertion hole 105R formed by penetrating the partition body 67. The recess 108L is provided in a portion corresponding to the second slide rail 86L, ​​and the recess 108R is provided in a portion corresponding to the second slide rail 86R. Therefore, when the driver's seat 6 is moved rearward and the stopper 98 abuts against the abutment member 99, the rear end of the upper rail 90 of the second slide rail 86L enters the recess 108L and the rear end of the upper rail 90 of the second slide rail 86R enters the recess 108R, thereby preventing interference between the partition member 22A and the second rail device 86, and thus the driver's seat 6 can be brought closer to the partition member 22A. In addition, the space in front of the driver's seat 6 can be made wider.

[0146] On the other hand, because the driver's seat 6 is supported by the suspension 88, when the operator sits on the driver's seat 6, the driver's seat 6 sinks due to the operator's weight. Taking this into consideration, when the operator is not seated on the driver's seat 6, the second slide rails 86L, ​​86R are located above the recesses 108L, 108R, as shown by the solid lines in Fig. 36. The avoidance recess 108 may be formed integrally with the closing plate 72 by recessing the closing plate 72 by press working.

[0147] The closing plate 72 is provided with a handle member 73. The handle member 73 is provided at a midway portion in the machine body width direction K2 of an upper portion of the closing plate 72, and protrudes upward from the closing plate 72.

[0148] As shown in Figs. 30 and 32, the partition member 22A has an escape recess 376 that prevents interference with a plurality of hydraulic hoses 368 arranged on the back side of the movable body 85 (driver's seat 6). The escape recess 376 is provided in the lower part of the partition member 22A. More specifically, the escape recess 376 is provided in the upper part of the second portion 67B of the partition main body 67, and is located below the first contact member 99A and the second contact member 99B. The escape recess 376 is formed in a cover plate 378 that closes an insertion hole 377 formed penetrating the partition main body 67. The escape recess 376 may be integrally formed with the partition member 22A by recessing the partition member 22A rearward by press working.

[0149] 36, the multiple hydraulic hoses 368 are provided at a position corresponding to the upper part of the relief recess 376. A hose guide 379 that guides and bundles the multiple hydraulic hoses 368 is provided at a position corresponding to the relief recess 376. The hose guide 379 is fixed to a stay member 380 that is erected on the first mounting portion 87A of the slide frame 87.

[0150] When the movable body 85 is moved rearward, the hydraulic hose 368 and the hose guide 379 enter the relief recess 376, thereby preventing interference between the partition member 22A and the hydraulic hose 368 and the hose guide 379. As a result, the driver's seat 6 can be brought closer to the partition member 22A and the space in front of the driver's seat 6 can be made larger.

[0151] The length (width) W5 of the relief recess 376 in the machine body width direction K2 is formed to be a length extending from the first contact member 99A side to the second contact member 99B side (a length slightly shorter than the width W4). The left end of the relief recess 376 is located to the left of the left end of the recess 108L, and the right end of the relief recess 376 is located to the right of the right end of the recess 108L. That is, the length W5 of the relief recess 376 is longer than the dimension W6 from the end of the recess 108L on the machine body outer side to the end of the recess 108R on the machine body outer side.

[0152] 37, the left end of the relief recess 376 is located to the left of the left end of the suspension 88, and the right end of the relief recess 376 is located to the right of the right end of the suspension 88. In other words, the length W5 of the relief recess 376 in the body width direction K2 is longer than the width W7 of the suspension 88 in the body width direction K2.

[0153] As shown in FIG. 36, the relief recess 376 also serves as an avoidance recess for preventing interference with the first rail device 84. More specifically, the left part of the relief recess 376 is located at a position corresponding to the rear of the first slide rail 84L, and the right part of the relief recess 376 is located at a position corresponding to the rear of the first slide rail 84R. The first rail device 84 also enters the lower part of the relief recess 376. That is, the relief recess 376 constitutes (serves) as a recess for avoiding interference with the first rail device 84. This makes it possible to prevent interference between the partition member 22A and the first rail device 84. As a result, the driver's seat 6 can be brought closer to the partition member 22A, and the space in front of the driver's seat 6 can be made wider. The left part of the relief recess 376 is located below the recess 108L, and the right part is located below the recess 108R (see FIG. 32).

[0154] As shown in FIG. 38, a sedimenter 381 is provided in the motor room E2. The sedimenter 381 is a device that separates and removes moisture and fine foreign matter mixed in the fuel (diesel). The sedimenter 381 is disposed on the opposite side of the cooling fan F1 in the motor room E2 and to the left of the exhaust gas purification device D1. That is, the sedimenter 381 is disposed on the downwind side of the cooling air generated by the cooling fan F1. The sedimenter 381 is provided at approximately the same height as the exhaust gas purification device D1 and disposed at a position overlapping the exhaust gas purification device D1 in the aircraft width direction K2 (flow direction K3 of the cooling air) (in this embodiment, the position overlapping in a side view). This makes it possible to prevent the cooling air from directly hitting the sedimenter 381. In turn, it is possible to prevent the fuel temperature from dropping too low and causing waxing.

[0155] As shown in FIG. 39, the sedimenter 381 is disposed at a position corresponding to approximately the center of the exhaust gas purification device D1 in the front-rear direction K1.

[0156] As shown in Figures 41, 42, and 43, the sedimenter 381 is disposed in front of the first rear leg 58L and is attached to a sedimenter bracket 382 fixed to the first rear leg 58L. The sedimenter bracket 382 has a first piece 381a fixed to the right surface of the first rear leg 58L and protruding forward, and a second piece 381b extending leftward from the protruding end of the first piece 381a. The sedimenter 381 is located between the first rear leg 58L and the second piece 381b and is attached to the second piece 381b. The sedimenter 381 is disposed near the inside of the bonnet rear portion 22B, and can be accessed by opening the bonnet rear portion 22B.

[0157] As shown in Fig. 38, a sedimenter cover 383 is provided between the sedimenter 381 and the exhaust gas purification device D1 to cover the sedimenter 381 relative to the exhaust gas purification device D1. In other words, the sedimenter cover 383 provides insulation between the sedimenter 381 and the exhaust gas purification device D1. Sedimenter Cover. The sedimenter cover 383 is disposed closer to the sedimenter 381 between the sedimenter 381 and the exhaust gas purification device D1. In other words, the sedimenter cover 383 is disposed away from the exhaust gas purification device D1 to make it less susceptible to the effects of heat from the exhaust gas purification device D1.

[0158] As shown in Fig. 42, the rear part of the sedimenter cover 383 is bolted to a mounting block 388 fixed to the rear surface of the first rear leg 58L. The sedimenter cover 383 is detachable separately from the sedimenter 381. This allows the sedimenter 381 to be covered or not covered depending on the situation.

[0159] As shown in Figures 38 and 39, a fuel pump 385, a recirculation valve 386, and a check valve 387 are provided behind the prime mover E1. These are provided on the lower side of the prime mover E1 and at a midway point in the aircraft width direction K2. The fuel pump 385 is a pump that draws in fuel and sends it to the prime mover E1. The recirculation valve 386 is a valve that switches between a state in which fuel returning from the prime mover E1 (return fuel) is sent to the fuel cooler N1 and a state in which the return fuel is sent to the sedimenter 381 without being sent to the fuel cooler N1. The check valve 387 is a valve that prevents the fuel from flowing back from the recirculation valve 386.

[0160] As shown in Figs. 43 and 44, the fuel pump 385, the recirculation valve 386, and the check valve 387 are attached to one bracket member 389. This allows the fuel pump 385, the recirculation valve 386, and the check valve 387 to be sub-assembled to the bracket member 389 and then attached to the aircraft body 2. The bracket member 389 has a first attachment portion 389a, a second attachment portion 389b extending leftward from the first attachment portion 389a, a third attachment portion 389c extending downward from the first attachment portion 389a, and a fourth attachment portion 389 extending forward from a middle portion of the third attachment portion 389c. The first attachment portion 389a is bolted to a stay member 390 fixed to the weight support member 45. The fuel pump 385 is attached to the second attachment portion 389b. The recirculation valve 386 is attached to the third attachment portion 389c. A check valve 387 is attached to the fourth mounting portion 389 .

[0161] As shown in Figures 38, 39 and 40, a fuel filter F2 is disposed at the rear of the prime mover E1 and above a fuel pump 385, a reflux valve 386 and a check valve 387. Therefore, a bracket member 389 is disposed below the fuel filter F2. The fuel filter F2 is a filter for removing foreign matter such as dirt from the fuel before it enters the prime mover E1. The fuel filter F2 is attached to the rear of a filter bracket 391 that protrudes rearward from the upper plate 59 side of the support frame 11.

[0162] The sedimenter 381, fuel pump 385, reflux valve 386, check valve 387 and fuel filter F2 are disposed near the inside of the bonnet rear portion 22B and can be accessed by opening the bonnet rear portion 22B (one-side maintenance is possible).

[0163] As shown in FIG. 38, FIG. 40, and FIG. 45, the sedimenter 381 is connected to the fuel tank T1 via a fuel hose 304 or the like (fuel line). The suction side of the fuel pump 385 is connected to the sedimenter 381 via a fuel hose 387A or the like, and the discharge side is connected to the fuel filter F2 via a fuel hose 387B or the like. The fuel filter F2 is connected to the prime mover E1 via a fuel hose 392. Therefore, the fuel is sucked from the fuel tank T1 through the sedimenter 381 into the fuel pump 385, and is discharged from the fuel pump 385 and supplied to the prime mover E1 via the fuel filter F2. In addition, a return line 393A through which the return fuel from the prime mover E1 flows is connected to a branching member 394. The branching member 394 is connected to the fuel cooler N1 via a return line 393B, and is connected to the check valve 387 via a return line 393C. The fuel cooler N1 is connected to the sub tank 300 via a return line 393D. Meanwhile, the check valve 387 is connected to a reflux valve 386 via a reflux line 395A, and the reflux valve 386 is connected to the fuel hose 304 via a reflux line 395B. Therefore, when the temperature of the return fuel is low, the reflux valve 386 is opened to return the return fuel to the sedimenter 381, and when the temperature of the return fuel is high, the reflux valve 386 is closed to return the return fuel to the fuel tank T1 via the fuel cooler N1 and the sub-tank 300.

[0164] 46 and 47, the fuel tank T1 is disposed below the step 52 and in front of the partition plate 47. A fuel supply unit 291 for injecting fuel to be replenished to the fuel tank T1 is provided in the motor chamber E2. Therefore, the partition plate 47 separates the motor chamber E2, which is the side where the motor E1 and the fuel supply unit 291 are disposed, from the side where the fuel tank T1 is disposed.

[0165] 40, fuel supply unit 291 is disposed rearward of the left part of partition member 22A. Furthermore, fuel supply unit 291 is disposed rearward and above fuel tank T1.

[0166] As shown in FIG. 46, fuel tank T1 and fuel supply unit 291 are connected by a connecting pipe 292 that penetrates partition plate 47. One end of connecting pipe 292 is connected to the side surface of fuel tank T1. The side surface of fuel tank T1 refers to the vertical wall surface between the upper surface and the lower surface, and includes the front surface, left surface, right surface, and rear surface. By connecting connecting pipe 292 to the side surface of fuel tank T1, connecting pipe 292 can be disposed at a low position, and connecting pipe 292 can be inserted through partition plate 47. By inserting connecting pipe 292 through partition plate 47, the partition structure between the side where prime mover E1 and fuel supply unit 291 are arranged and the side where fuel tank T1 is arranged can be simplified.

[0167] 48, the partition plate 47 has a through hole 294 formed at a rear position of the fuel tank T1. The through hole 294 is a hole through which a connecting pipe 292 is inserted. The fuel tank T1 has an inflow pipe section 293 for allowing fuel to flow in, on the rear surface, which is the side surface corresponding to the through hole 294. The axial direction of the inflow pipe section 293 is approximately parallel to the normal direction to the plate surface of the partition plate 47.

[0168] The fuel supply unit 291 has a supply pipe 295 for supplying fuel at its lower part. The inflow pipe 293 and the supply pipe 295 are connected by a connection pipe 292.

[0169] The connecting pipe 292 has a first portion 292a and a second portion 292b. The first portion 292a is connected to the inflow pipe portion 293. The first portion 292a extends from the inflow pipe portion 293 toward the through hole 294 and passes through the through hole 294. The second portion 292b extends upward from the first portion 292a and is connected to the supply pipe portion 295. The gap between the through hole 294 and the connecting pipe 292 is sealed by a sealant 296. Since the connecting pipe 292 simply passes through the partition plate 47 perpendicularly, the partition structure between the side where the prime mover E1 is arranged and the side where the fuel tank T1 is arranged can be simplified.

[0170] When the connecting pipe 292 for introducing fuel into the fuel tank T1 is connected to the side of the fuel tank T1, the fuel tank T1 will not be filled with fuel unless the air above the inflow pipe section 293 is vented. Therefore, as shown in FIG. 47, the upper part of the fuel tank T1 and the fuel supply section 291 are connected by an air vent pipe 297 for venting the air in the fuel tank T1. During refueling, the air in the fuel tank T1 is vented by the air vent pipe 297, so that the fuel can be filled up to the upper part of the inflow pipe section 293 in the fuel tank T1. The air vent pipe 297 connects the upper part of the fuel tank T1 and the lower part of the supply pipe section 295. The air vent pipe 297 is provided in an inclined shape that transitions upward as it moves from the fuel tank T1 toward the fuel supply section 291 (toward the rear). This allows air to be vented well even when the fuselage 2 is inclined.

[0171] As shown in Fig. 47, fuel supply section 291 has subtank 300 capable of storing fuel, and fuel filler port 301 for injecting fuel into subtank 300. By providing subtank 300, the fuel storage capacity is increased. Supply pipe section 295 extends downward from subtank 300. Fuel injected into subtank 300 flows from supply pipe section 295 through connecting pipe 292 and inflow pipe section 293 into fuel tank T1. Subtank 300 is located inside the aircraft, at the rear of exterior member (outer layer member) 163 that constitutes the exterior of cabin 5.

[0172] 1, the exterior member 163 constitutes the exterior of the rear lower part of the cabin 5 and covers the left side of the engine room E2. An opening 169 is formed in the rear part of the exterior member 163. This opening 169 is closed by an opening / closing lid 170 in an openable / closable manner.

[0173] 47, a fuel filler opening 301 is located inside the opening / closing lid 170. Therefore, when the opening / closing lid 170 is opened, the fuel filler opening 301 can be accessed and fuel can be filled.

[0174] As shown in Fig. 46, a storage box 401 that stores fuel supply unit 291 is provided behind partition member 22A. Storage box 401 forms a fuel supply unit storage chamber 291A that stores fuel supply unit 291. Sedimenter 381 is provided adjacent to the rear of storage box 401. Also, as shown in Fig. 39, storage box 401 is disposed adjacent to the left side of the front part of exhaust gas purification device D1.

[0175] As shown in Fig. 49, one side surface (left side surface) of the storage box 401 is open. That is, the storage box 401 has a box opening 402 that opens to the left on one side surface. As shown in Figs. 50 and 51, the box opening 402 is closed by the exterior member 163.

[0176] As shown in Fig. 49, a plurality of seal materials 403A to 403E are provided on the periphery of the box opening 402. As shown in Figs. 50 and 51, the seal materials 403A to 403C and the seal material 403D are in contact with the exterior member 163. As shown in Fig. 50, the seal material 403E is in contact with the upper surface of the auxiliary cover 54, which is an exterior member on the fuselage 2 side. As shown in Figs. 1 and 17, the auxiliary cover 54 is located above the rear of the left side of the swivel cover 51, and covers the motor chamber E2. The seal materials 403A to 403E seal the periphery of the box opening 402.

[0177] 52 and 53, fuel supply unit accommodating chamber 291A is closed by right side surface portion (other side surface) 401A, front side surface portion 401B, rear side surface portion 401C, upper side surface portion 401D, and lower side surface portion 401E of accommodation box 401. That is, fuel supply unit accommodating chamber 291A is partitioned from motor chamber E2 within motor chamber E2 by right side surface portion 401A, front side surface portion 401B, rear side surface portion 401C, upper side surface portion 401D, and lower side surface portion 401E.

[0178] 53, the lower side surface portion 401E has an insertion portion 404 through which the supply pipe portion 295 is inserted. The gap between the insertion portion 404 and the supply pipe portion 295 is sealed by a sealant. The lower side surface portion 401E is formed in a shape that conforms to the shape of the lower surface of the subtank 300, and supports the subtank 300. The storage box 401 has a recessed portion 407 formed at a corner between the right side surface portion 401A, the rear side surface portion 401C, and the lower side surface portion 401E. The recessed portion 407 is provided with an insertion portion 409 through which a connection portion 408 to which the return pipe line 393D is connected is inserted.

[0179] As shown in Fig. 52, the right side surface portion 401A has a recessed portion 406 on the front side to avoid interference with the first front leg 57L of the support frame 11. As shown in Fig. 51, the subtank 300 is attached to the storage box 401 via stays 413A and 413B. Note that a heat insulating material is attached to the outer surface of the storage box 401 as appropriate.

[0180] 54, the storage box 401 has a main member 411 attached to the support frame 11 (first front leg 57L) and a sub-member 412 detachably attached to the main member 411. The sub-member 412 constitutes the left side of the lower part of the rear side surface portion 401C and the left side of the lower side surface portion 401E. The main member 411 constitutes the parts of the storage box 401 other than the sub-member 412.

[0181] As shown in FIG. 49, the main member 411 has a box mounting portion 414 that is attached to the support frame 11. The box mounting portion 414 includes a first member 414A and a second member 414B. The first member 414A is attached to a first mounting portion 415A fixed to the first front leg 57L by a bolt 416A. The second member 414B is attached to a second mounting portion 415B fixed to the first front leg 57L by a bolt 416B. In this way, by limiting the fixing point of the storage box 401 to the support frame 11 only, position adjustment is facilitated and assembly and removal can be easily performed.

[0182] 54, the sub-component 412 has a sub-component attachment portion 417 attached to the main component 411. The sub-component attachment portion 417 has a first portion 417A, a second portion 417B, and a third portion 417C. The first portion 417A is attached to a first fixing portion 418A provided on the main component 411 by a bolt 419A. The second portion 417B is attached to a second fixing portion 418B provided on the main component 411 by a bolt 419B. The third portion 417C is attached to a third fixing portion 418C provided on the main component 411 by a bolt (not shown).

[0183] As shown in Fig. 54, the main member 411 is provided with a sensor member 420, a switch box 421, and a buzzer 422. The sensor member 420 is, for example, a sensor that detects when fuel is full when it is being poured. The switch box 421 is, for example, a switch box that operates a fueling device that is a device that pours fuel into the subtank 300. The buzzer 422 is, for example, a buzzer that notifies that the fuel is full. By removing the submember 412, the members and devices in the storage box 401 can be easily accessed.

[0184] In addition, the rear of the storage box 401 and the cabin 5 are attached to the support frame 11. That is, by attaching the storage box 401 and the exterior member 163 that closes the box opening 402 of the storage box 401 to the same member, it is possible to achieve precision in the positional relationship of these parts.

[0185] As shown in Fig. 55, the radiator R1, oil cooler O1, condenser G3, fuel cooler N1, and receiver G2 are disposed on the right side of the rear of the revolving frame 41, to the right of the motor compartment E2. As shown in Fig. 56, the radiator R1 and oil cooler O1 are disposed side by side in the front-rear direction as described above, and are placed and supported on a support body 426 provided on the revolving frame 41 (revolving base plate 42).

[0186] As shown in Fig. 55, a tank stand 424 supporting the hydraulic oil tank T2 is provided in front of the oil cooler O1. The tank stand 424 is fixed onto the swivel base 42. As shown in Fig. 55, the tank stand 424 has a tank mounting plate 424A on which the hydraulic oil tank T2 is placed and attached, and a support plate 424B erected on the swivel base 42 to support the rear part of the tank mounting plate 424A. A shroud 425 covering the cooling fan F1 is provided to the left of the radiator R1 and the oil cooler O1.

[0187] As shown in Fig. 57, the support 426 is disposed on the right side of the portion where the front rib 232R and the rear rib 233R of the second rib 43R overlap. As shown in Fig. 60, the rear rib 233R has a reinforcing portion (contact portion) 233a at its front portion, which is in surface contact with the rear surface of the support plate 424B and fixed by welding. In this embodiment, the front surface of the rear rib 233R is formed into a flat surface (see Fig. 86), and the front portion of the rear rib 233R is in surface contact with the rear surface of the support plate 424B and fixed by welding.

[0188] 57 and 58, the support 426 has a through-portion (opening) 428 through which a plurality of hydraulic lines 427 arranged on the rotating frame 41 (rotating base plate 42) pass. The hydraulic lines 427 passing through the through-portions 428 are composed of hydraulic piping (including hydraulic hoses and steel pipes), hydraulic joints, etc., and are, for example, lines that send hydraulic oil from the hydraulic pump P1 to the control valve V1.

[0189] 58, the hydraulic line (hydraulic hose) 427 is routed through a pipe through hole 238 formed in the area where the front rib 232R and the rear rib 233R overlap. The support body 426 covers the right side of the portion where the pipe through hole 238 is formed.

[0190] 57, a holding member 429 that holds the hydraulic line 427 is provided on the side (right side) of the through-portion 428. The holding member 429 has a mounting base 430 fixed on the revolving frame 41, a clamp member 431 that holds the hydraulic line 427 in the up-down direction, and a pressing member 432 that holds the clamp member 431 between the mounting base 430 and the clamp member 431.

[0191] As shown in FIG. 58, the holding member 429 is disposed on the right side of the rear rib 233R (pipe through hole 238). The mounting base 430 is formed of a rectangular plate material that is long in the front-rear direction K1, and is fixed to the swivel base plate 42 by welding. The clamp member 431 has a lower member 431A and an upper member 431B made of an elastic member. The lower member 431A is disposed below the hydraulic line (hydraulic hose) 427 and placed on the mounting base 430. The upper member 431B is disposed above the hydraulic line 427. The pressing member 432 is formed of a rectangular plate material that is long in the front-rear direction K1, and is placed on the upper member 431B. The holding member 429 is fixed to the swivel base plate 42 by a front bolt 433A and a rear bolt 433B that penetrate the pressing member 432 and the clamp member 431 and are screwed into the mounting base 430.

[0192] As shown in Figures 56 and 58, the support body 426 has a passage member 434 and a seal member 437 which constitute the through portion 428, a base member 450 which is attached to the swivel base 42 by bolts 438A and 438B, and a support bracket (support base) 445 which is attached to the base member 450 (airframe 2).

[0193] 60, the passage member 434 has a front wall (first vertical wall portion) 434a, a rear wall (second vertical wall portion) 434b, and an upper wall (connecting wall portion) 434c. The front wall 434a and the rear wall 434b are disposed to face each other in the front-rear direction K1 (a horizontal direction intersecting with the routing direction of the hydraulic pipe 427) and sandwich the hydraulic pipe 427. The upper wall 434c connects upper portions of the front wall 434a and the rear wall 434b to each other.

[0194] As shown in FIG. 57, the seal member 437 is attached to an edge of the passage member 434 corresponding to the holding member 429, and abuts against the holding member 429 to seal between the passage member 434 and the holding member 429. More specifically, as shown in FIG. 60, the seal member 437 has a front portion 437a, a rear portion 437b, and an upper portion 437c. These portions 437a to 437c are formed continuously and abut against the left side surface of the holding member 429. The front portion 437a is attached to the edge of the front wall 434a, and the rear portion 437b is attached to the edge of the rear wall 434b, and is attached to the edge of the upper wall 434c. The seal member 437 is a trim seal with an abutment portion made of a cushioned tube attached to a base that fits into the mounting portion.

[0195] With the above configuration, the lower member 431A and the upper member 431B made of elastic members are sandwiched between the mounting base 430 and the pressing member 432 and tightly adhere to the periphery of the hydraulic line 427 without any gaps, and further, the holding member 429 abuts against the sealing member 437 attached to the passage member 434, thereby sealing the periphery of the hydraulic line 427 and improving the sealing performance of the motor chamber E2. As a result, it is possible to prevent the heat in the motor chamber E2 from being transmitted to the cooler (the radiator R1, the oil cooler O1, etc.) and causing a decrease in cooling performance. In addition, it is possible to prevent the sound in the motor chamber E2 from leaking to the outside of the motor chamber E2, thereby achieving low noise.

[0196] As shown in FIG. 59, the base member 450 has a mounting plate 435 and a support plate 444 .

[0197] As shown in Fig. 60, the mounting plate 435 is disposed on the left side of the passage member 434. The left side of the passage member 434 penetrates the middle part of the mounting plate 435 in the front-rear direction K1. The passage member 434 is fixed to the mounting plate 435 by welding. The mounting plate 435 has a vertical plate portion 439 whose plate surface faces the aircraft width direction K2, and a mounting plate portion 440 extending rightward from the lower end of the vertical plate portion 439. The vertical plate portion 439 protrudes forward and backward from the passage member 434 to close the gaps on both sides of the holding member 429 in the front-rear direction K1. In detail, the vertical plate portion 439 has a front portion 439a that protrudes forward from the passage member 434, a rear portion 439b that protrudes rearward from the passage member 434, an upper portion 439c that is located above the passage member 434 and connects the upper portions of the front portion 439a and the rear portion 439b, and an extension portion 439d that extends rearward from the upper portion of the rear portion 439b.

[0198] As shown in FIG. 60, a seal material 441 (second seal material) is fixed to the front end of the front portion 439a, and the seal material 441 abuts against the reinforcement portion 233a. A blocking plate 442 is provided between the rear portion 439b and the weight support 44 to block the gap between them. The blocking plate 442 is fixed to the swivel base plate 42 with bolts. The blocking plate 442 is provided with a through portion 442a formed by fitting a trim to the edge of a U-shaped cutout that opens upward. This through portion 442a is a portion through which a wiring member such as a pipe or a harness passes. An extension portion 439d is located at the upper end of this through portion 442a.

[0199] 59, the support plate 444 has an upper wall portion 444a and an attachment wall portion 444b extending downward from the right end portion of the upper wall portion 444a. The left portion of the upper wall portion 444a is overlapped with the upper end of the vertical plate portion 439 and fixed by welding. A first hole 447A, a second hole 447B, and a third hole 447C are formed penetrating the upper wall portion 444a in this order from the front.

[0200] 55, the support bracket 445 supports and places an object to be mounted on the revolving frame 41. Specifically, the support bracket 445 supports a radiator R1 and an oil cooler O1.

[0201] As shown in FIG. 57, the support bracket 445 has an upper wall 445a, a first extending wall 445b extending downward from the right end of the upper wall 445a, and a second extending wall 445c extending upward from the left end of the upper wall 445a. The upper wall 445a is overlapped with an upper wall portion 444a of the support plate 444. A plurality of first mount members (first elastic member J1, second elastic member J2, third elastic member J3, fourth elastic member J4; lower elastic member) made of an elastic member such as rubber are provided on the upper wall 445a at intervals in the front-rear direction K1. The first elastic member J1 and the second elastic member J2 are provided at the rear of the support bracket 445 at intervals in the front-rear direction. The third elastic member J3 and the fourth elastic member J4 are provided at the front of the support bracket 445 at intervals in the front-rear direction. The first elastic member J1 to the fourth elastic member J4 have holes through which pins can be inserted. The first elastic member J1 corresponds to the third hole 447C shown in Fig. 59, the second elastic member J2 corresponds to the second hole 447B, and the third elastic member J3 corresponds to the first hole 447A. The fourth elastic member J4 corresponds to a notched portion in the front part of the support plate 444.

[0202] The first extension wall 445b is fixed to the mounting wall portion 444b by bolts 449. A lower protruding wall 425c of the shroud 425 shown in FIG. 59 is attached to the second extension wall 445c from the left side by bolts.

[0203] For example, when a bracket supporting the radiator R1 and the oil cooler O1 is welded and fixed on the swivel base plate 42, a gap is required around the holding member 429 to avoid interference with a welding torch. In this embodiment, by fixing the support 426 supporting the radiator R1 and the oil cooler O1 to the swivel frame 41 with bolts, it is not necessary to provide a gap around the holding member 429 for welding the bracket supporting the radiator R1 and the oil cooler O1 to the swivel base plate 42, and the gap (opening) between the motor chamber E2 and the arrangement space of the radiator R1, etc. can be reduced. This makes it possible to reduce leakage of the cooling air taken into the motor chamber E2 to the arrangement side of the radiator R1, etc. As a result, it is possible to improve the cooling performance of the hydraulic oil and the cooling water of the motor E1 and reduce the leakage of noise from the motor chamber E2.

[0204] In this embodiment, the support body 426, the closing plate 442, etc. close the space below the shroud 425 between the reinforcement portion 233a of the rear rib 233R and the weight support 44. That is, the support body 426, the closing plate 442, etc. configure a partition structure (first partition structure) below the shroud 425 that partitions the motor chamber E2 while minimizing gaps through which cooling air leaks.

[0205] The base member 450 is fixed to the swivel base plate 42 with bolts after the hydraulic pipeline 427 is routed on the swivel base plate 42. Thereafter, the hydraulic pipeline (hydraulic hose) 427 is held by the holding member 429 while the clamp member 431 and the pressing member 432 of the holding member 429 are abutted against the seal member 437. The base member 450 may be attached to the swivel base plate 42 with the support bracket 445 assembled to the base member 450.

[0206] As shown in Fig. 63A, a plurality of pins (first plug-in pin b1, second plug-in pin b2; first lower protrusion) protruding downward are provided on the lower part of the radiator R1. The first plug-in pin b1 is inserted into the first elastic member J1 from above. The second plug-in pin b2 is inserted into the second elastic member J2 from above. As a result, the radiator R1 is placed on the support bracket 445 via the first elastic member J1 and the second elastic member J2 (first mounting member) and supported in a vibration-proof manner.

[0207] As shown in FIG. 63A, the oil cooler O1 is attached to a support frame 452. The support frame 452 has an upper frame member 452A located above the oil cooler O1, a lower frame member 452B located below, a front frame member 452C located at the front side, and a rear frame member 452D located at the rear side. The upper frame member 452A connects the upper portions of the front frame member 452C and the rear frame member 452D to each other. The lower frame member 452B connects the lower portions of the front frame member 452C and the rear frame member 452D to each other. The lower frame member 452B is provided with a plurality of pins (third plug pin b3, fourth plug pin b4; second lower protrusion) that protrude downward. The third plug pin b3 is inserted from above into the third elastic member J3. The fourth plug pin b4 is inserted from above into the fourth elastic member J4. As a result, the oil cooler O1 is placed on the support bracket 445 via the third elastic member J3 and the fourth elastic member J4 (first mounting member) and supported in a vibration-proof manner.

[0208] 61 and 62, a fitting bracket 453 that is detachably fitted to the upper parts of the radiator R1 and the oil cooler O1 is provided on the upper parts of these coolers R1 and O1. The fitting bracket 453 has an upper wall 453a, a first extending wall 453b extending downward from the right end of the upper wall 453a, and a second extending wall 453c (see FIG. 63B) extending downward from the left end of the upper wall 453a.

[0209] The upper wall 453a is located above the coolers R1 and O1. On the upper wall 453a, a plurality of second mount members (fifth elastic member J5, sixth elastic member J6, seventh elastic member J7, eighth elastic member J8; upper elastic members) made of an elastic member such as rubber are provided at intervals in the front-rear direction K1. The fifth elastic member J5 and the sixth elastic member J6 are provided at an interval in the front-rear direction on the rear part of the fitting bracket 453. The seventh elastic member J7 and the eighth elastic member J8 are provided at an interval in the front-rear direction on the front part of the fitting bracket 453. The fifth elastic member J5 to the eighth elastic member J8 have holes through which a pin can be inserted. The second mount members are interposed between the fitting bracket 453 and the radiator R1 and the oil cooler O1, and the radiator R1 and the oil cooler O1 are supported on the fitting bracket 453 in a vibration-proof manner via the second mount members.

[0210] 63A, one end of a front support stay 455A is attached to the front portion of the first extending wall 453b by a bolt 456A. ​​The other end of the support stay 455A is attached to the support frame 11 by a bolt 457A.

[0211] 63A, one end of a rear support stay 455B is attached to the rear portion of the first extending wall 453b by a bolt 456B. The other end of the support stay 455B is attached to the support frame 11 by a bolt 457B.

[0212] 63B, second extending wall 453c is divided into front and rear parts. A front stay part 425d provided on a front upper part of shroud 425 is attached to the front side of second extending wall 453c by bolt 454A. A rear stay part 425e provided on a rear upper part of shroud 425 is attached to the rear side of second extending wall 453c by bolt 454B.

[0213] As shown in Fig. 63A, the upper portion of the radiator R1 is provided with a plurality of pins (a fifth plug-in pin b5, a sixth plug-in pin b6; a first upper protrusion) that protrude upward. The fifth plug-in pin b5 can be inserted into the fifth elastic member J5. The sixth plug-in pin b6 can be inserted into the sixth elastic member J6.

[0214] Additionally, the upper frame member 452A of the support frame 452 is provided with a plurality of pins (a seventh plug pin b7, an eighth plug pin b8; a second upper protrusion) that protrude upward. The seventh plug pin b7 can be inserted into the seventh elastic member J7. The eighth plug pin b8 can be inserted into the eighth elastic member J8.

[0215] According to the above configuration, the radiator R1 and the oil cooler O1 can be lifted up by removing the fitting bracket 453. This allows them to be removed individually from the support bracket 445, and the radiator R1 and the oil cooler O1 can be replaced individually. This in turn improves maintainability. In addition, the radiator R1 and the oil cooler O1 are arranged side by side and supported in an anti-vibration manner by upper and lower mounting members, thereby improving the mount strength.

[0216] 56 and 61, fitting bracket 453 and support bracket 445 are connected by a connecting frame (frame member) 459. Furthermore, a plurality of inverted U-shaped hangers 460A, 460B are fixed to fitting bracket 453. The plurality of hangers 460A, 460B include a front hanger 460A provided at the front of fitting bracket 453 and a rear hanger 460B provided at the rear. Note that the number of hangers may be one.

[0217] According to the above configuration, the cooling system equipment unit U2 including the radiator R1 and the oil cooler O1 can be suspended as a whole in a state in which the radiator R1 and the oil cooler O1 are sandwiched between the fitting bracket 453 and the support bracket 445 and the fitting bracket 453 and the support bracket 445 are connected by the connecting frame 459. Therefore, the radiator R1 and the oil cooler O1 can be integrally assembled or removed from the airframe 2, improving the ease of assembly and maintenance of the cooler.

[0218] 56, the connecting frame 459 is a frame member on which the condenser G3 is supported (attached). Therefore, in this embodiment, the cooling system equipment unit U2 including the radiator R1, the oil cooler O1, and the condenser G3 can be integrally assembled to or detached from the airframe 2.

[0219] In addition, the fuel cooler N1 and the receiver G2 are attached to the connecting frame 459. Therefore, in this embodiment, the cooling system equipment unit U2 including the radiator R1, the oil cooler O1, the condenser G3, the fuel cooler N1, and the receiver G2 can be integrally assembled to or detached from the airframe 2.

[0220] As shown in Fig. 61, the condenser G3 is disposed on the right side of the radiator R1. The front part of the condenser G3 is disposed between the front part of the radiator R1 and the rear part of the oil cooler O1 (see Figs. 81 and 82). The fuel cooler N1 is located to the right and rear of the condenser G3. The receiver G2 is located to the right and front of the condenser G3.

[0221] 61, the connecting frame 459 has an upper frame member 459A located above the capacitor G3, a lower frame member 459B located below, a front frame member (one end frame member) 459C located at the front side (one end side), and a rear frame member (other end frame member) 459D located at the rear side (the other end side opposite to the one end side). The upper frame member 459A connects the upper parts of the front frame member 459C and the rear frame member 459D. The lower frame member 459B connects the lower parts of the front frame member 459C and the rear frame member 459D.

[0222] As shown in Figures 61 and 66, the front part of the upper frame member 459A is supported by a pivot pin (referred to as a first pivot pin) 461 on the fitting bracket 453 so as to be rotatable about the vertical axis. The first pivot pin 461 is provided on a support stay 462 which is detachably attached to the middle part of the fitting bracket 453 by a bolt 463. The front frame member 459C is located in front of the first pivot pin 461. An attachment stay 464 is fixed to the rear part of the upper frame member 459A. The attachment stay 464 is detachably attached to a boss 465 provided on the rear part of the fitting bracket 453 by a bolt 466. In this way, the upper part of the connecting frame 459 is connected to the fitting bracket 453.

[0223] As shown in FIG. 66, the lower part of the rear frame member 459D is shorter than the lower part of the front frame member 459C. The lower frame member 459B has a first part 467a extending forward from the lower end of the rear frame member 459D, a second part 467b extending downward from the front end of the first part 467a, and a third part 467c extending forward from the lower end of the second part 467b and connected to the lower end side of the front frame member 459C. The first part 467a is longer than the third part 467c, and the second part 467b is disposed close to the front frame member 459C. The front part (third part 467c) of the lower frame member 459B is supported by a pivot pin (referred to as a second pivot pin) 469 on the support bracket 445 so as to be rotatable around the vertical axis. The second pivot pin 469 is provided on a support stay 468 provided in the middle of the support bracket 445.

[0224] As shown in Fig. 66, the axis of the second pivot pin 469 is concentric with the axis of the first pivot pin 461. That is, one end side of the connecting frame 459 in the horizontal direction is supported rotatably about a vertical axis (rotation axis X2), and supports the condenser G3 (the cooler farther from the prime mover E1) so that it can approach and move away from the radiator R1 (the cooler arranged closer to the prime mover E1). Also, the connecting frame 459 opens and closes by rotating about the rotation axis X2, and the condenser G3 approaches and moves away from the radiator R1. In detail, the condenser G3 is supported at a front end side (one end side) rotatably about the rotation axis X2, and at a rear end side (the other end side) it approaches and moves away from the radiator R1.

[0225] The direction in which the connecting frame 459 moves away from the radiator R1 (moving away direction) is the opening direction, and the direction in which the connecting frame 459 approaches the radiator R1 is the closing direction. In this embodiment, the front side of the connecting frame 459 is the pivot side, and the rear side is the opening side. In addition, the rotation axis X2 of the connecting frame 459 is located closer to the rear side (closer to the rear frame member 459D) than the front frame member 459C.

[0226] 66, an attachment stay 470 is fixed to the second portion 467b. The attachment stay 470 is detachably attached to the support stay 468 by a bolt 471. In this way, the lower part of the connection frame 459 is connected to the support bracket 445.

[0227] As shown in Fig. 63A, fitting bracket 453 has a restricting pin (first restricting portion) 481. Restricting pin 481 is provided in the middle of fitting bracket 453 so as to protrude downward. As shown in Fig. 68, restricting pin 481 is a restricting member that abuts against the front upper part of connecting frame 459 to restrict the opening angle of connecting frame 459 when connecting frame 459 rotates in the opening direction. This state in which the opening angle of connecting frame 459 is restricted is called an open state.

[0228] As shown in FIG. 62, the fitting bracket 453 has a restricting piece (second restricting portion) 482 and a support piece 483. The restricting piece 482 is provided at the rear of the fitting bracket 453. As shown in FIG. 69, the left part of the restricting piece 482 is pivotally supported by the support piece 483 via a pivot 484. This allows the restricting piece 482 to swing up and down. The support piece 483 is fixed to the first extending wall 453b of the fitting bracket 453. The restricting piece 482 has a lower edge portion 482a that abuts against the upper surface 459a of the connecting frame 459. The lower edge portion 482a is relatively slidable on the upper surface 459a of the connecting frame 459. The restricting piece 482 also has a recess 482b at the lower right side. The recess 482b has an upper edge portion 482c and a side edge portion 482d, and is open to the right and downward. The restriction piece 482 also has a knob 482e at the upper right side.

[0229] As shown by solid lines in Fig. 69, when the connecting frame 459 is in a closed state, the base of the restricting piece 482 is placed on the upper surface 459a of the connecting frame 459. When the connecting frame 459 is moved in the opening direction from this state, the connecting frame 459 moves with the upper surface 459a in contact with the lower edge 482a of the restricting piece 482, and when the connecting frame 459 reaches the open state shown by virtual lines in Fig. 69, the restricting piece 482 swings downward and the recess 482b engages with the connecting frame 459. Then, the upper edge 482c abuts against the upper surface 459a of the connecting frame 459 to restrict the downward swing of the restricting piece 482, and the side edge 482d faces the upper left side surface of the connecting frame 459 to restrict the movement of the connecting frame 459 in the closing direction. In other words, the restricting piece 482 is a restricting member that restricts the movement of the condenser G3 in the separating direction when the condenser G3 is rotated in the separating direction away from the radiator R1.

[0230] When closing the connecting frame 459, the knob 482e is grasped and the restricting piece 482 is lifted up. This releases the restriction on the movement of the connecting frame 459 in the closing direction, allowing the connecting frame 459 to be closed.

[0231] As shown in Fig. 67, the front frame member 459C and the rear frame member 459D have a plurality of mounting portions (mounting portions 459a to 459d) to which the condenser G3 is attached. The condenser G3 is attached to the mounting portions 459a to 459d with bolts. The fuel cooler N1 is attached to a mounting frame 472 fixed to the rear frame member 459D. The receiver G2 is attached to a mounting stay 473 fixed to the front frame member 459C with bolts.

[0232] As shown in FIG. 64, the condenser G3 has a first connection joint 475 to which a refrigerant hose (referred to as a first refrigerant hose) 474 is connected at the upper part of the front end side. The semi-liquid refrigerant compressed by the compressor G1 is sent to the condenser G3 via the first refrigerant hose 474 and the first connection joint 475, etc. The lower part of the front part of the condenser G3 and the upper part of the receiver G2 are connected by a connection hose 476, etc. The refrigerant that has progressed in liquefaction in the condenser G3 is sent to the receiver G2 via the connection hose 476, etc. The receiver G2 has a second connection joint 478 to which a refrigerant hose (referred to as a second refrigerant hose) 477 is connected at the upper part. The refrigerant from which moisture and impurities have been removed in the receiver G2 is sent to the air conditioner main body 136 via the second connection joint 478 and the second refrigerant hose 477, etc.

[0233] The first connection joint 475 and the second connection joint 478 are located near the rotation axis X2. This makes it possible to suppress expansion of the first refrigerant hose 474 and the second refrigerant hose 477 when the connection frame 459 (the condenser G3 and the receiver G2) rotates toward the opening side about the rotation axis X2, and to prevent interference with surrounding members. In addition, it is possible to prevent the first refrigerant hose 474 and the second refrigerant hose 477 from kinking (bending excessively and breaking).

[0234] Further, the first refrigerant hose 474 and the second refrigerant hose 477 are arranged in a diagonal direction that transitions downward as it approaches the front. As shown in Fig. 64, the first refrigerant hose 474 and the second refrigerant hose 477 pass through an insertion portion 480 provided in the shroud 425 and are arranged on the motor chamber E2 side.

[0235] As shown in Fig. 59, the insertion portion 480 is formed by forming a recess 480a in the lower front surface of the shroud 425 and adhering a sealant 480b to the inner surface of the recess 480a. As shown in Fig. 62, a hose guide 548 that guides the first refrigerant hose 474 and the second refrigerant hose 477 is disposed near the insertion portion 480. A sealant 549 is provided on the hose guide 548. The sealant 549 abuts against the hydraulic oil tank T2 (see Fig. 82).

[0236] 56, a gas check member (sight glass) 479 for checking the amount of refrigerant is provided at the second connection joint 478. The viewing surface for checking the state of the refrigerant faces upward. More specifically, the viewing surface is an inclined surface that shifts leftward as it goes upward.

[0237] 64 and 65, when the first cover member 26 is open, the right side of the cooling system equipment unit U2 is open (exposed). Therefore, when the first cover member 26 is open, the gas check member 479 can be easily seen from the right side of the body 2, making it easy to check the refrigerant.

[0238] In the above configuration, by removing the bolts 466 and 471, the connecting frame 459 can be rotated around the rotation axis X2 (the axis of the first pivot pin 461 and the second pivot pin 469) as shown by imaginary lines in Figures 61 and 68. This allows the condenser G3, the fuel cooler N1, and the receiver G2 to be moved rightward away from the radiator R1, making it possible to clean the core surface (right side surface) of the radiator R1 or the back side (left side surface) of the condenser G3. At this time, the connecting frame 459 opens sideways, so that the radiator R1 and the condenser G3 can be cleaned from the horizontal direction (sideways), making cleaning easy.

[0239] In addition, because the rotation axis X2 is located toward the rear of the front frame member 459C, when the connecting frame 459 is rotated to the opening side, the front frame member 459C swings to the left about the rotation axis X2, as shown in Fig. 68. This allows the left side of the front frame member 459C to be cleaned when the connecting frame 459 is opened.

[0240] 62, 64, and 68, a part 46a of the weight 46 is present on the opening side of the connecting frame 459. This part of the weight 46 is the seal contact portion 46a with which the edge of the first cover member 26 comes into contact via a seal material. As shown in FIG. 66, an interference avoidance portion recessed upward is formed in the lower portion of the connecting frame 459 so that the lower portion of the connecting frame 459 does not interfere with the seal contact portion 46a when the connecting frame 459 is rotated in the opening direction. More specifically, the interference avoidance portion is composed of a first portion 467a and a second portion 467b of the lower frame member 459B.

[0241] The connecting frame 459 can be removed by removing the bolts 466 and 471 and by removing the support stay 462. In addition, with the connecting frame 459 removed, the fitting bracket 453 can be removed from the radiator R1 and the oil cooler O1 by removing the bolts 457A, 457B (see FIG. 61) and the bolts 454A, 454B (see FIG. 63B).

[0242] As shown in FIG. 55, the swivel base plate 42 is formed with a discharge hole 486 through which foreign matter such as dust (hereinafter referred to as dust, etc.) on the swivel base plate 42 can be discharged. As shown in FIG. 57, the discharge hole 486 is formed behind the holding member 429 and to the right of the rear of the base member 450. As shown in FIG. 55 and FIG. 62, the discharge hole 486 is formed at the rear (other end side) and to the right of the capacitor G3. As shown in FIG. 68, the discharge hole 486 is formed at a position overlapping the capacitor G3 and the connecting frame 459 (lower frame member 459B) in a plan view in a state in which the movement of the capacitor G3 in the opening direction is restricted by the restricting pin 481. More specifically, the first portion 467a of the lower frame member 459B is located above the discharge hole 486 in a state in which the movement of the capacitor G3 in the opening direction is restricted by the restricting pin 481.

[0243] Dust and the like that falls when cleaning the radiator R1 and the condenser G3 falls from the discharge hole 486. Dust and the like that does not fall from the discharge hole 486 accumulates around the discharge hole 486 of the swivel base plate 42, and can be easily discharged from the discharge hole 486. Although it is preferable to remove dust and the like that accumulates around the discharge hole 486 with the connecting frame 459 closed, the lower part of the connecting frame 459 has a shape that is recessed upward from the first portion 467a and the second portion 467b, so that even when the connecting frame 459 is open, the space above the discharge hole 486 is wide, and the work of removing dust and the like can be easily performed.

[0244] As shown in Fig. 57, discharge hole 486 is closed by cover plate 487 provided on the upper surface side of swivel base plate 42. As shown in Fig. 58, cover plate 487 is detachably attached to the upper surface of swivel base plate 42 from above by bolts 489A and 489B. This allows cover plate 487 to be attached and detached from above, making the attachment and detachment operation easy.

[0245] As shown in FIG. 58 and FIG. 59, a guide member 488 is fixed to the cover plate 487. The guide member 488 is a member that guides wiring members such as a hose and a harness that are wired above the swivel base plate 42. The wiring members are, for example, fuel hoses that allow fuel to flow, and in this embodiment, the guide member 488 is a hose guide that guides the return pipes 393B and 393D that are fuel hoses. By fixing the guide member 488 to the cover plate 487, the guide member 488 can be used as a gripping member (handle). That is, by holding the guide member 488 and lifting the cover plate 487, the operation of opening the discharge hole 486 can be easily performed. Conversely, when closing the discharge hole 486, the cover plate 487 can be easily fixed.

[0246] As shown in Fig. 55, a partition structure (second partition structure) 458 is provided above the radiator R1 and the oil cooler O1. As shown in Fig. 70A, the partition structure 458 is a structure that separates the motor chamber E2 from the side where the coolers (the radiator R1, the oil cooler O1, etc.) are arranged above the shroud 425. The shroud 425 and the partition structure 458 are side members arranged on the sides of the motor E1.

[0247] 30 and 70B, the support frame 11 has a partition cover 491 that partitions the motor chamber E2 to the right of the partition member 22A. The partition cover 491 is provided on the front right side of the support frame 11. More specifically, the partition cover 491 is provided on the side of the second front leg 57R, opposite the partition member 22A.

[0248] The partition cover 491 has a side wall portion 491a, an upper wall portion 491b, a front wall portion 491c, a contact wall 491d, and a lower wall portion 491e. The side wall portion 491a contacts the right side surface of the second front leg 57R and is fixed by welding. The side wall portion 491a protrudes forward from the second front leg 57R. The upper wall portion 491b extends rightward (laterally) from the upper end of the side wall portion 491a. The front wall portion 491c extends downward from the front end of the upper wall portion 491b and is connected to the front end of the side wall portion 491a. The contact wall 491d extends forward from the right end (lateral end) of the front wall portion 491c. A seal block 539 is attached to the upper portion of the contact wall 491d (see FIG. 72). The lower wall portion 491e extends leftward from the lower end of the contact wall 491d and is connected to the lower end of the front wall portion 491c.

[0249] The shroud 425 is disposed on the right side of the prime mover E1, the partition structure 458 is disposed above the shroud 425, and the partition cover 491 is disposed between the partition structure 458 and the shroud 425 and the second front leg 57R. Therefore, the upper wall portion 491b of the partition cover 491 covers the upper portion between the prime mover E1 and the shroud 425 and the partition structure 458 (side member). Also, the front wall portion 491c covers the front portion between the prime mover E1 and the shroud 425 and the partition structure 458.

[0250] As shown in FIG. 70B, the second rear leg 58R has an upper portion 58a whose front portion is fixed to the underside of the upper plate 59 and protrudes rearward from the upper plate 59, an intermediate portion 58b which slopes downward as it extends rearward from the upper portion 58a, and a lower portion 58c which extends downward from the lower end of the intermediate portion 58b and has its lower end fixed to the second rear mounting plate 61R.

[0251] As shown in FIG. 70B, a plurality of attachment members (first attachment member 492A to fourth attachment member 492D) for attaching the partition structure 458 are provided on the upper right side of the partition cover 491 and on the upper part of the second rear leg 58R.

[0252] The first mounting member 492A has a first portion 493a fixed to the right front end of the upper wall portion 491b of the partition cover 491, a second portion 493b extending downward from the front portion of the first portion 493a and fixed to the upper right end of the front wall portion 491c, and a third portion 493c extending downward from the rear end of the first portion 493a. A plurality of (three) insertion holes 495a, 495b, 495c are formed in the first portion 493a at intervals in the front-rear direction. Nuts are fixed to portions of the left side surface of the first mounting member 492A corresponding to the insertion holes 495a, 495b, 495c. The abutting wall 491d is formed below the second portion 493b.

[0253] The second mounting member 492B has a first portion 494a extending from the rear right end of the upper wall portion 491b to the upper plate 59, and a second portion 494b extending downward from the front portion of the first portion 494a and fixed to the third portion 493c of the first mounting member 492A. An insertion hole 495d is formed in the front portion of the first portion 494a, and an insertion hole 495e is formed in the lower portion of the second portion 494b. Nuts are fixed to the left side surface of the second mounting member 492B at portions corresponding to the insertion holes 495d, 495e.

[0254] The third mounting member 492C is fixed to the front underside of the upper portion 58a of the second rear leg 58R. An insertion hole 495g is formed in the third mounting member 492C. A nut is fixed to a portion of the left side surface of the third mounting member 492C that corresponds to the insertion hole 495g.

[0255] The fourth mounting member 492D is fixed to the middle portion 58b of the second rear leg 58R. The fourth mounting member 492D has a plurality of (two) insertion holes 495h, 495k formed therein. Nuts are fixed to the left side surface of the fourth mounting member 492D at positions corresponding to the insertion holes 495h, 495k.

[0256] 70A , the partition structure 458 closes the space surrounded by the upper end of the shroud 425, the upper portion 58a and the middle portion 58b of the second rear leg 58R, and the upper portion of the partition cover 491. The partition structure 458 has a main plate 496, a first sub-plate 497, a second sub-plate 498, and a piping bracket 499.

[0257] As shown in FIG. 70A, the main plate 496 is provided above the shroud 425 and across from the contact wall 491d of the partition cover 491 to the intermediate region 58b of the second rear leg 58R.

[0258] As shown in FIG. 71, the main plate 496 has a first cutout portion 500 that opens downward, a second cutout portion 501 that opens upward, and a third cutout portion 502 that opens upward.

[0259] As shown in Fig. 71, the first cutout portion 500 has an upper portion 500a formed at the rear and upper portion of the main plate 496, and a lower portion 500b formed at the rear and lower portion of the main plate 496. The front lower end of the upper portion 500a communicates with the upper end of the lower portion 500b. The lower portion 500b has a first opening 515a that opens downward, and opens downward. As shown in Fig. 73, a grommet 506A (referred to as a first grommet) and a grommet 506B (referred to as a second grommet) are arranged in a front-to-rear arrangement in the upper portion 500a.

[0260] 74, a harness 507A (routing member) bundling a plurality of electric wires is inserted through the first grommet 506A. A harness 507B (routing member) is also inserted through the second grommet 506B. That is, the harness 507A and the harness 507B are routed through the first cutout portion 500 from the cooler arrangement side to the motor chamber E2, and connected to the motor E1 side.

[0261] As shown in Fig. 71, a plurality of (four) insertion holes 496a to 496d are formed in the rear of the main plate 496. The insertion holes 496a and 496b are formed at a distance in the vertical direction behind the upper portion 500a. The insertion holes 496c and 496d are formed at a distance in the vertical direction behind the insertion holes 496a and 496b. A nut is fixed to a portion of the left side surface of the main plate 496 corresponding to the insertion holes 496a and 496b.

[0262] As shown in Fig. 71, the second cutout portion 501 is provided in a midway portion (approximately the center portion) in the front-rear direction K1 of the main plate 496. The second cutout portion 501 has a second opening portion 515b that opens upward. An insertion hole 496e is formed in a wall portion 496A between an upper portion 500a of the main plate 496 and the second cutout portion 501. An insertion hole 496g is formed on the rear lower side of the second cutout portion 501 of the main plate 496. A nut is fixed to a portion of the left side surface of the main plate 496 that corresponds to the insertion hole 496g.

[0263] The third cutout portion 502 is formed in the front portion of the main plate 496. The third cutout portion 502 has a third opening portion 515c that opens upward. A wall portion 496B between the second cutout portion 501 and the third cutout portion 502 in the main plate 496 has a plurality of (two) insertion holes 496h, 496k formed at intervals in the up-down direction. A wall portion 496C forming the front portion of the third cutout portion 502 in the main plate 496 has an insertion hole 496n formed therein.

[0264] 71, sealing material 503A and sealing material 503B are fitted to the lower edge of main plate 496. Sealing material 503A is located behind first cutout portion 500, and sealing material 503B is located in front of first cutout portion 500. As shown in FIG 70A, main plate 496 abuts against the upper surface of upper wall 542a of shroud 425 via sealing material 503A and sealing material 503B.

[0265] As shown in Fig. 70A and Fig. 72, the main plate 496 is detachably attached to the mounting members 492A to 492D by bolts 504A to 504C. The bolt 504A passes through the insertion hole 496c and the insertion hole 495h, and is screwed into a nut fixed to the left surface of the fourth mounting member 492D. The bolt 504B passes through the insertion hole 496e and the insertion hole 495g, and is screwed into a nut fixed to the left surface of the third mounting member 492C. The bolt 504C passes through the insertion hole 496n and the insertion hole 495a, and is screwed into a nut fixed to the left surface of the first mounting member 492A.

[0266] 72, bolt 457A (bolt for attaching the other end of support stay 455A) is inserted through insertion holes 496k, 495e and screwed into a nut fixed to the left surface of second attachment member 492B. Bolt 457B (bolt for attaching the other end of support stay 455B) is inserted through insertion holes 496d, 495k and screwed into a nut fixed to the left surface of fourth attachment member 492D.

[0267] As shown in FIG. 73, the first subplate 497 has a first portion 497a, a second portion 497b, a third portion 497c, and a fourth portion 497d. The first portion 497a is a portion forming the upper portion of the first subplate 497, and extends in the front-rear direction K1. The second portion 497b extends downward from the rear of the first portion 497a. The third portion 497c extends forward from the lower portion of the second portion 497b. The fourth portion 497d extends forward and downward from the third portion 497c. The first subplate 497 has a front-opening notched opening 508 formed by the first portion 497a, the third portion 497c, and the fourth portion 497d. The notched opening 508 has a first opening 508a on the front side and a second opening 508b on the rear side. The first opening 508a and the second opening 508b are in communication with each other. Behind the notched opening 508 in the first sub-plate 497, an insertion hole 512a and an insertion hole 512b are formed.

[0268] As shown in Fig. 70A, the first sub-plate 497 is disposed such that the notched opening 508 corresponds to the upper portion 500a of the first notched portion 500, and is fixed to the main plate 496 by bolts 513A and 513B. In detail, the bolt 513A is inserted through the insertion hole 512a and the insertion hole 496a and screwed into a nut fixed to the left surface of the main plate 496. The bolt 513B is inserted through the insertion hole 512b and the insertion hole 496b and screwed into a nut fixed to the left surface of the main plate 496. The first grommet 506A is held by the upper and lower edges of the first opening 508a, and the second grommet 506B is held by the upper, lower and rear edges of the second opening 508b. More specifically, a fitting groove is formed around the entire circumference of the outer peripheral end faces of first grommet 506A and second grommet 506B, and first grommet 506A and second grommet 506B are held by fitting the edge of notched opening 508 into this groove. First sub-plate 497 engages with first grommet 506A and second grommet 506B by moving forward from the rear side of first cutout portion 500.

[0269] As shown in FIG. 73, a U-shaped insertion portion 509 that opens rearward is provided at the upper rear portion of the fourth portion 497d. The insertion portion 509 is configured by fitting a U-shaped trim to the edge of a U-shaped cutout that opens rearward. As shown in FIG. 74, the insertion portion 509 is a portion through which a reservoir hose (first hose) 510 passes. The reservoir hose 510 is a hose that connects a reservoir tank 517 arranged in the engine room E2 to the radiator R1, and is routed through the first cutout portion 500. The reservoir tank 517 is a tank that temporarily stores excess coolant that is generated when the temperature of the coolant that cools the engine E1 increases and the volume expands. The fourth portion 497d is a cover portion that covers the first cutout portion 500 around the reservoir hose 510.

[0270] As shown in FIG. 73, an L-shaped cutout 511 with a curved corner is formed in the front lower portion of the third portion 497c. An upper hose (second hose) 514 of the radiator R1 is inserted into an insertion space formed by this L-shaped cutout 511 and a lower portion 500b of the first cutout portion 500 (see FIG. 70A and FIG. 74). The upper hose 514 is a hose that circulates a coolant that cools the prime mover E1, and is routed through the first cutout portion 500 between the prime mover chamber E2 and the side where the radiator R1 is arranged. As shown in FIG. 70A, a seal material 516 that abuts against the upper hose 514 is fitted to the edge of the L-shaped cutout 511. The fourth portion 497d is a cover portion that covers the first cutout portion 500 around the upper hose 514.

[0271] In the partition structure 458 having the above configuration, the main plate 496 is attached to the support frame 11 before the support frame 11 is assembled to the revolving frame 41. The reservoir tank 517 is attached to the support frame 11 before the support frame 11 is assembled to the main plate 496. The reservoir hose 510 is connected to the reservoir tank 517 before the main plate 496 is attached. The support frame 11 is assembled to the revolving frame 41 after the prime mover E1 is mounted. Therefore, the harnesses 507A, 507B and the upper hose 514 are assembled before the support frame 11 is assembled to the revolving frame 41. The harness 507A is inserted first through the first grommet 506A before the support frame 11 is assembled to the revolving frame 41, and the harness 507B is inserted first through the second grommet 507B.

[0272] To assemble the support frame 11 to the revolving frame 41, the support frame 11 is lifted and lowered onto the revolving frame 41 from above. At this time, the first sub-plate 497 is removed from the main plate 496. This allows the harnesses 507A and 507B, the reservoir hose 510, and the upper hose 514 to be inserted into the first cutout portion 500 from below through the first opening 515a. After assembling the support frame 11 to the revolving frame 41, the first sub-plate 497 is attached to the main plate 496. First, the first sub-plate 497 is fitted into the first grommet 506A and the second grommet 507B, the reservoir hose 510 is inserted into the insertion portion 509, and the seal material 516 is pressed against the upper hose 514. Then, the first sub-plate 497 is fixed to the main plate 496 with bolts. This allows the first grommet 506A and the second grommet 507B to be held, as well as the harnesses 507A, 507B, the upper hose 514 and the reservoir hose 510, and covers the first cutout portion 500 around the upper hose 514 and the reservoir hose 510.

[0273] As described above, the support frame 11 and the partition structure 458 can be assembled in a state in which the harnesses 507A, 507B, the upper hose 514, and the reservoir hose 510 are preassembled.

[0274] Furthermore, when replacing the harnesses 507A, 507B, etc., the harnesses 507A, 507B can be removed simply by removing the first sub-plate 497, improving ease of maintenance.

[0275] As shown in Fig. 74, an air cleaner 519 is provided on the side where the cooler is arranged. The air cleaner 519 is supported by a bracket member 521 attached to the support frame 11. An intake duct 520 connecting the air cleaner 519 and the prime mover E1 is arranged through the second cutout portion 501 to span the side where the cooler is arranged and the prime mover chamber E2. The intake duct 520 is also attached to the support frame 11.

[0276] As shown in FIG. 70A, a duct seal 518 that covers the periphery of the intake duct 520 is provided in the second cutout portion 501. The duct seal 518 is divided into a first seal member 518A and a second seal member 518B. The first seal member 518A is held by the edge portion of the second cutout portion 501. In detail, fitting grooves are formed on the front and bottom surfaces of the first seal member 518A, and the first seal member 518A is held by fitting the front edge (edge ​​portion) and bottom edge (edge ​​portion) of the second cutout portion 501 into these grooves.

[0277] The second seal member 518B is held by the second sub-plate 498. The second sub-plate 498 has a first portion 498a and a second portion 498b. The first portion 498a constitutes the upper portion of the second sub-plate 498 and extends in the front-rear direction K1. The second portion 498b extends downward from the rear portion of the first portion 498a. Fitting grooves are formed at the upper and rear ends of the second seal member 518B, and the second seal member 518B is held by fitting the lower edge of the first portion 498a of the second sub-plate 498 into the groove at the upper end and fitting the front edge of the second portion 498b of the second sub-plate 498 into the groove at the rear edge.

[0278] An insertion hole 522a is formed in the front of the first portion 498a. An insertion hole 522b is formed in the lower portion of the second portion 498b. The second sub-plate 498 is detachably attached to the main plate 496 by bolts 523A and 523B. In detail, as shown in FIG. 72, the bolt 523A is inserted through the insertion hole 522a and the insertion hole 495d and screwed into a nut fixed to the left surface of the second mounting member 492B. The bolt 523B is inserted through the insertion hole 496g and screwed into a nut fixed to the left surface of the main plate 496.

[0279] In the above configuration, the partition structure 458 is assembled to the support frame 11 with the air cleaner 519 and the intake duct 520 supported by the support frame 11. When assembling the partition structure 458, the main plate 496 is attached to the support frame 11 with the second sub-plate removed. Since the second cutout portion 501 opens upward, the intake duct 520 can be inserted into the second cutout portion 501 through the second opening 515b by moving the main plate 496 upward from the lower side of the intake duct 520. The first seal member 518A of the duct seal 518 is held by the main plate 496 before the intake duct 520 is inserted into the second cutout portion 501. The second seal member 518B of the duct seal 518 is disposed in the second cutout portion 501 after the intake duct 520 is inserted into the second cutout portion 501. Thereafter, the second sub-plate 498 is attached to the main plate 496 .

[0280] As described above, the partition structure 458 can be assembled to the support frame 11 with the air cleaner 519 and the intake duct 520 preassembled to the support frame 11.

[0281] 73 and 75, piping bracket 499 is a member that holds piping member 524 for an air conditioner. Piping member 524 has a charge port 524a to which a charge hose for injecting refrigerant is connected. Piping member 524 is bifurcated, with one pipe connected to compressor G1 and the other pipe connected to the air conditioner main body 136 side.

[0282] As shown in FIG. 73, the piping bracket 499 includes a bracket body 525, a mounting bracket 526, and a piping clamp 527. The bracket body 525 is made of a plate material and includes a vertical wall 525a whose plate surface faces the width direction K2 of the machine body, a lower wall 525b extending rightward from the lower end of the vertical wall 525a, and a rear wall 525c extending rightward from the rear end of the vertical wall 525a. A plurality of (two) insertion holes 528a, 528b are formed at an upper portion of the vertical wall 525a at intervals in the front-rear direction K1. A through hole 538 long in the front-rear direction K1 is formed at a middle portion of the vertical wall 525a in the up-down direction. A seal material 531 that abuts against the lower edge of the third cutout portion 502 is fixed to the lower surface of the lower wall 525b. A sealant 532 is fixed to the rear surface of the rear wall 525c, and comes into contact with the third portion 493c of the first mounting member 492A.

[0283] 70A and 72, the vertical wall 525a is attached to the first mounting member 492A by bolts 529A and 529B. More specifically, the bolt 529A is inserted through the insertion holes 528a and 495b and screwed into a nut fixed to the left surface of the first mounting member 492A. The bolt 529B is inserted through the insertion holes 528b and 495c and screwed into a nut fixed to the left surface of the first mounting member 492A.

[0284] 75, the mounting bracket 526 is made of a plate material and has a fixed wall 526a fixed in surface contact with the lower right surface of the vertical wall 525a, and a support wall 526b extending rightward from the upper end of the fixed wall 526a. Nuts 530A and 530B are provided on the lower surface of the support wall 526b at an interval in the front-rear direction K1.

[0285] As shown in FIG. 75 and FIG. 73, the piping clamp 527 has a lower clamp member 527A, an upper clamp member 527B, and a pressing plate 527C. The lower clamp member 527A is placed on the support wall 526b. The lower clamp member 527A is provided with an insertion tube 533A and an insertion tube 533B spaced apart in the front-rear direction K1 (see FIG. 73). The upper clamp member 527B is stacked on the lower clamp member 527A with the piping member 524 sandwiched therebetween. The upper clamp member 527B is formed with an insertion hole 536a and an insertion hole 536b spaced apart in the front-rear direction K1. The piping member 524 is interposed between the lower clamp member 527A and the upper clamp member 527B so that the charge port 524a faces rightward (the side where the cooler is disposed). The press plate 527C is placed on the upper clamp member 527B. The press plate 527C has an insertion hole 537a and an insertion hole 537b formed at intervals in the front-rear direction K1. The piping clamp 527 is fixed to the mounting bracket 526 by a bolt 534A and a bolt 534B.

[0286] As shown in Fig. 73, the bolt 534A is inserted through the insertion hole 537a and the insertion hole 536a and through the insertion tube 533A, and is screwed into the nut 530A (see Fig. 75). The bolt 534B is inserted through the insertion hole 537b and the insertion hole 536b and through the insertion tube 533B, and is screwed into the nut 530B (see Fig. 75).

[0287] In the partition structure 458 having the above configuration, the piping member 524 is pre-assembled and then assembled to the support frame 11. When assembling, first, the bracket body 525 is attached to the support frame 11 with the piping clamp 527 removed. Then, the main plate 496 is attached to the support frame 11. At this time, since the third cutout portion 502 opens upward, by moving the main plate 496 upward from below the bracket body 525, the third cutout portion 502 fits into the bracket body 525 from below, and the bracket body 525 can be inserted into the third cutout portion 502. Next, the support frame 11 is assembled to the revolving frame 41. Then, the bifurcated portion of the piping member 524 is arranged from the motor chamber E2 side through the through hole 538 to the side where the cooler is arranged. Next, the bifurcated portion of the piping member 524 is fixed to the mounting bracket 526 by the piping clamp 527.

[0288] As described above, the support frame 11 and the partition structure 458 can be assembled with the piping member 524 pre-assembled.

[0289] As shown in Fig. 76A, the shroud 425 has a shroud main body (main body portion of the shroud 425) 541. The shroud main body 541 is a portion that houses the cooling fan F1, as shown in Figs.

[0290] As shown in FIGS. 76A and 76B, the shroud body 541 has a peripheral wall portion 542 that covers the periphery (outer periphery) of the cooling fan F1, and a side wall portion 543 that covers the left side surface of the peripheral wall portion 542. As shown in FIGS. 81 and 82, the right side surface of the shroud body 541 is open. The radiator R1 and the oil cooler O1 are disposed on the right side of the shroud body 541. As shown in FIG. 82, the width in the front-rear direction of the shroud body 541 is formed to a front-rear width W8 corresponding to the radiator R1 and the oil cooler O1. The front-rear width W8 of the shroud body 541 is wider in a width W10 on the front side from the rotation axis X3 than in a width W9 on the rear side from the rotation axis X3 of the cooling fan F1. The front end side of the partition cover 491 is provided at a position corresponding to the front end side of the shroud 425.

[0291] 76A to 76C, the peripheral wall portion 542 has an upper wall 542a that covers the upper side of the cooling fan F1, a lower wall 542b that covers the lower side of the cooling fan F1, a front wall 542c that covers the front of the cooling fan F1, and a rear wall 542d that covers the rear of the cooling fan F1. An air blowing opening 544 that corresponds to the outer circumferential circle of the cooling fan F1 is formed in the side wall portion 543. The cooling air generated by the cooling fan F1 is blown toward the prime mover E1 through the air blowing opening 544.

[0292] 82, the air outlet 544 and the cooling fan F1 are provided offset toward the radiator R1 from the center (the center in the front-rear direction K1) of the shroud 425. The condenser G3 and the cooling fan F1 are disposed closer to the radiator R1 than the boundary between the radiator R1 and the oil cooler O1.

[0293] As shown in FIG. 70A, a partition structure 458 is provided above the shroud 425, and sealing material 503A and sealing material 503B at the lower end of this partition structure 458 abut against an upper wall 542a of the shroud main body 541, thereby sealing between the partition structure 458 and the shroud 425.

[0294] As shown in FIGS. 76A and 76C, the shroud 425 has an upper overhanging wall 425a extending upward from the upper wall 542a. A stay portion 425d is provided at the front of the upper overhanging wall 425a, and a stay portion 425e is provided at the rear of the upper overhanging wall 425a. The shroud 425 has a front overhanging wall 425b extending forward from the front wall 542c. An upper portion of the front overhanging wall 425b is connected to the front portion of the upper overhanging wall 425a. A seal mounting wall 425g is provided from the upper portion to the lower portion of the front overhanging wall 425b. The seal mounting wall 425g extends leftward from the front overhanging wall 425b. An upper portion of the seal mounting wall 425g is bent rearward and connected to the upper wall 542a of the shroud body 541. A trim seal (first seal material) 545 is attached to the protruding end (left end) of the seal mounting wall 425g.

[0295] As shown in Figures 77, 81 and 82, the trim seal 545 comes into contact with the right surface of the abutment wall 491d of the partition cover 491 when the shroud 425 is assembled. Therefore, the trim seal 545 seals between the front part of the shroud 425 and the abutment wall 491d. More specifically, as shown in Figures 70A and 77, the seal block 539 seals between the upper part of the abutment wall 491d and the front part of the main plate 496. Therefore, the trim seal 545 seals below the seal block 539. Specifically, the trim seal 545 seals from the seal block 539 to the insertion part 480 described above.

[0296] As shown in Figs. 76A and 76C, a recess 480a forming the insertion portion 480 is formed in the lower portion of the front overhang wall 425b. The recess 480a is provided below the lower end of the seal mounting wall 425g. A lower portion 480c of the seal material 480b bonded to the inner surface (front surface) of the recess 480a is formed by extending downward from the lower end of the recess 480a. A trim seal 546 is provided between the lower end of the trim seal 545 and the upper end of the seal material 480b. As shown in Fig. 78, the trim seal 546 and the lower portion 480c of the seal material 480b abut against the rear surface of the hydraulic oil tank T2.

[0297] As shown in Fig. 78, a seal mounting wall 425h extending to the right is provided at the lower part of the front overhang wall 425b and below the recess 480a. The lower wall of the seal mounting wall 425h extends rearward and is connected to a lower overhang wall 425c extending downward from the lower wall 542b. The front part of the lower overhang wall 425c is connected to the lower part of the front overhang wall 425b. As shown in Fig. 76C, a seal material 547 is bonded from the upper end of the front surface of the seal mounting wall 425h to the lower surface. The upper part of this seal material 547 abuts against the hydraulic oil tank T2.

[0298] As shown in FIG. 59, the middle part of the seal material 547 abuts from the upper surface of the tank mounting plate 424A through the rear end of the tank mounting plate 424A and the rear surface of the support plate 424B to the reinforcement part 233a. The lower part of the seal material 547 abuts against the upper wall part 444a. The seal mounting wall 425h and the seal material 547 are formed in a stepped shape corresponding to the shapes of the tank mounting plate 424A, the support plate 424B and the reinforcement part 233a. The lower part of the front part of the shroud 425 is sealed by the trim seal 546, the seal material 480b and the seal material 547. The trim seal 546, the seal material 480b and the seal material 547 are provided in the lower part of the shroud 425 and below the trim seal 545, and constitute a seal structure 602 (see FIG. 80) that abuts against the hydraulic oil tank T2 and the tank stand 424.

[0299] As described above, the sealing performance of the front part of the shroud 425 can be improved by the trim seal 545, the trim seal 546, the sealing material 480b, and the sealing material 547. In detail, by directly contacting the sealing members (trim seal) 545, the trim seal 546, the sealing material 480b, and the sealing material 547) provided on the shroud 425 with the members on the front side around the shroud 425, the sealing performance of the front part around the shroud 425 can be improved.

[0300] As shown in FIG. 76A and FIG. 76B, a rear overhang wall 425k extending rearward is provided at the upper part of the rear wall 542d. A seal mounting wall 551 is provided at the lower part of the rear wall 542d. A seal material (second seal material) 550 is bonded to the rear surface of the seal mounting wall 551. The seal material 550 is formed in the up-down direction from the upper part to the lower part. The lower end of the seal material 550 is bent forward. As shown in FIG. 79 and FIG. 82, the rear surface of the seal material 550 abuts against a seal abutment surface 552 of the weight 46. The seal material 550 seals between the shroud main body 541 and the weight 46 and from the approximately center part to the lower end of the shroud main body 541 in the up-down direction. The lower end of the seal material 550 abuts against the front part of the right end side of the weight support 44.

[0301] As shown in FIG. 80 and FIG. 81, a cover panel 553 constituting a part of the bonnet 22 is provided on the inside (motor chamber E2 side) of the joint between the bonnet rear part 22B and the first cover member 26. The bonnet rear part 22B and the first cover member 26 abut against the cover panel 553 via a trim seal. The cover panel 553 has a seal mounting wall 553a formed in the front right part (one end part) close to the rear wall 542d of the shroud main body 541. This seal mounting wall 553a is provided at a position corresponding to the rear upper part of the shroud 425. A seal material (third seal material) 554 is provided in the vertical direction on this seal mounting wall 553a. When the shroud 425 is assembled, the seal material 554 abuts against the upper part of the rear wall 542d (rear part of the shroud 425) of the shroud main body 541. The seal material 554 provides a seal between the shroud body 541 and the cover panel 553 and above the seal material 550 (weight 46).

[0302] As described above, the rear portion of shroud 425 can be well sealed by sealant 550 and sealant 554. In particular, by directly abutting sealants 550 and 554 provided on shroud 425 against the rear side members around shroud 425, the sealing performance around shroud 425 at the rear portion can be improved.

[0303] As shown in FIG. 83, a frame member 206 is disposed inside the second cover member 27 (inside the side cover 21). This frame member 206 is attached to the airframe 2. More specifically, as shown in FIG. 84, the frame member 206 is connected to the support frame 11 and extends from the support frame 11 to the front of the airframe 2 (the revolving frame 41), and its front part is erected on the airframe 2. The frame member 206 also supports the side cover 21 (the first cover member 26, the second cover member 27). Since the frame member 206 connects the support frame 11 and the airframe 2, the support strength for the side cover 21 is strong. The frame member 206 can also function as a reinforcing member for the support frame 11.

[0304] As shown in Figs. 84 to 86, the frame member 206 has a first frame component member 208 and a second frame component member 207. The first frame component member 208 is formed of a rectangular thick plate material that is long in the front-rear direction K1, is attached to the upper part of the support frame 11, and protrudes forward from the support frame 11. More specifically, the first frame component member 208 is disposed so that its plate surface faces up and down, and its rear part is placed on the left part of the upper plate 59 and fixed with bolts, and protrudes forward from the upper plate 59. Also, as shown in Fig. 83, the first frame component member 208 is disposed on the rear side and underside of the upper part of the peripheral wall portion 27a.

[0305] As shown in Figures 85 and 86, the second frame component 207 extends forward from the first frame component 208 and is bent so that its front portion extends downward and is fixed to the fuselage 2. To explain in detail, the second frame component 207 includes a first frame portion 556 and a second frame portion 557. The first frame portion 556 and the second frame portion 557 are formed of a rod material such as a pipe material. The first frame portion 556 has a first portion 556a, a second portion 556b, and a third portion 556c. The rear portion of the first portion 556a is fixed to the lower surface of the first frame component 208 and protrudes forward from the first frame component 208. The second portion 556b extends in an inclined direction that transitions downward as it moves forward from the first portion 556a. The third portion 556c extends downward from the front end of the second portion 556b.

[0306] As shown in Fig. 88, the third portion 556c has an inclined shape in which the upper portion transitions toward the inside of the fuselage as it goes downward, and the lower portion extends vertically downward. As shown in Fig. 83, the second portion 556b is disposed on the front side and underside of the upper portion of the peripheral wall portion 27a. The third portion 556c is disposed rearward of the front portion of the peripheral wall portion 27a.

[0307] The second frame portion 557 is disposed below and behind the third portion 556c in the side view shown in Fig. 85. The second frame portion 557 is erected on the swivel frame 41 (swivel base plate 42) at a position behind the support bracket 18. The second frame portion 557 is flange-coupled to the first frame portion 556 (third portion 556c). More specifically, a flange 558A is fixed to the lower end of the third portion 556c, a flange 558B is fixed to the upper end of the second frame portion 557, and the flanges 558A and 558B are coupled to each other by bolts.

[0308] 85 and 86, a hinge support plate 559 is provided on the first frame component member 208. The hinge support plate 559 has a side plate portion 559a whose plate surface faces the aircraft width direction K2, a front plate portion 559b extending leftward from a front end of the side plate portion 559a, and a rear plate portion 559c extending leftward from a rear end of the side plate portion 559a.

[0309] 87 and 88, a hinge mechanism 226 is provided on the right side of side plate portion 559a of hinge support plate 559. A frame 225 supporting first cover member 26 is provided on the inner side of first cover member 26.

[0310] The frame body 225 is connected to the first frame component 208 via a hinge mechanism 226 and a hinge support plate 559. The lower part of the frame body 225 can be locked to the machine body 2 via a locking mechanism 227. By releasing the lock by the locking mechanism 227, the first cover member 26 can be swung up and down (opened and closed) by the hinge mechanism 226. A damper device (e.g., a gas damper) 555 is provided across a support piece 565A provided on the hinge mechanism 226 and a support piece 565B provided on the frame body 225. The damper device 555 can hold the first cover member 26 in an open state.

[0311] As shown in Figures 85 and 86, frame member 206 has a cover attachment portion including a plurality of attachment pieces (attachment piece 560A to attachment piece 560C). Second cover 27 is attached to this cover attachment portion. Attachment piece 560A is fixed to the rear part of first frame component member 208. Attachment piece 560B is fixed to the front part of hinge support plate 559. Attachment piece 560C is fixed to third portion 556C of first frame part 556.

[0312] 83, fixing portions 561A to 561C fixed to mounting pieces 560A to 560C are provided on the inner surface of second cover member 27. Fixing portion 561A is provided at a position corresponding to mounting piece 560A and is fixed to mounting piece 560A with a bolt. Fixing portion 561B is provided at a position corresponding to mounting piece 560B and is fixed to mounting piece 560B with a bolt. Fixing portion 561C is provided at a position corresponding to mounting piece 560C and is fixed to mounting piece 560C with a bolt.

[0313] As described above, the second cover member 27 is attached to the frame member 206 so as to be detachable from the inside of the second cover member 27. By configuring the second cover member 27 so as to be detachable from the inside, the gap Y1 between the second cover member 27 and the cabin 5 can be narrowed, thereby making it possible to enlarge the interior of the cabin 5 or the internal space of the side cover 21, or to improve the sealing performance between the second cover member 27 and the cabin 5.

[0314] As shown in Fig. 83, the controller 24B and the isolator 562 (devices) are attached to the third portion 556c of the first frame portion 556 (second frame constituent member 207). The controller 24B is the prime mover ECU as described above. The isolator 562 is a device that appropriately charges the sub-battery with surplus power from the battery BT1 during driving based on a voltage safety monitoring system.

[0315] By removing the second cover member 27, it is easy to access the controller 24B and the isolator 562. That is, by removing the second cover member 27, the controller 24B and the isolator 562 can be easily visually confirmed, and can be easily removed from or attached to the frame member 206. In addition, the frame member 206 serves both to attach the side cover 21 and to attach the controller 24B and the isolator 562, enabling the use of multiple members.

[0316] By attaching the first cover member 26 and the second cover member 27 to the frame member 206, the positional deviation between these cover members 26, 27 is reduced, and adjustment for aligning the cover members 26, 27 with each other can be omitted.

[0317] Furthermore, for example, if a frame member is formed by bending a single strip of plate material, the overall plate thickness must be adjusted to match the plate thickness of the portion requiring strength, resulting in increased weight. In contrast, in this embodiment, the frame member 206 is formed from a first frame component member 208 and a second frame component member 207, thereby achieving weight reduction. That is, the frame member 206 is formed from the first frame component member 208, which is made of a thick plate material, in the portions requiring strength, and the other portions are formed from the second frame component member 207, which is made of a bar material. This allows the frame member 206 to be made lighter.

[0318] 89, a harness 563 is attached to the frame member 206 and routed around the frame member 206. The harness 563 is connected to the controller 24B and the isolator 562. Therefore, the frame member 206 also serves as a member for supporting the harness 563.

[0319] 84, an attachment stay 564 is fixed to the second frame portion 557 in a protruding manner to the right. A battery stand 566, which will be described later, is attached to this attachment stay 564. Therefore, the frame member 206 also serves as a member for attaching the battery stand 566.

[0320] It should be noted that other devices such as a fuse box (slow-blow fuse box) may be attached to the frame member 206.

[0321] As shown in FIG. 90, a battery stand 566 on which a battery BT1 is attached is provided at the front of the right part of the revolving frame 41. The battery stand 566 can selectively attach a plurality of types of batteries BT1 with different attachment methods. In this embodiment, two types of batteries BT1, a first battery BT1a and a second battery BT1b, can be selectively attached. As shown in FIG. 91, the first battery BT1a has a rectangular three-dimensional shape and has a terminal 568A and a terminal 568B on the front surface 567a side of the upper surface 567c. As shown in FIG. 97, the second battery BT1b has a rectangular three-dimensional shape and has a terminal 570A and a terminal 570B on the front surface 569a side of the upper surface 569c.

[0322] In addition, in this embodiment, the first battery BT1a and the second battery BT1b are attached to the battery stand 566 with the front faces 567a, 569a facing toward the front of the aircraft and the back faces 567b, 569b facing toward the rear of the aircraft, but this is not limited to this, and the first battery BT1a and the second battery BT1b may be attached with the front faces 567a, 569a facing toward the right or left of the aircraft, or toward the rear of the aircraft, or diagonally relative to the front-to-rear direction K1.

[0323] As shown in FIG. 91, the first battery BT1a has a front surface 567a and a back surface 567b formed in a flat shape.

[0324] 99, the second battery BT1b has a first recessed portion 569e recessed toward the rear in the lower part of the front surface 569a, and a first engagement protrusion 569g provided to protrude forward from the lower part of the first recessed portion 569e. The second battery BT1b also has a second recessed portion 569h recessed toward the front in the lower part of the back surface 569b, and a second engagement protrusion 569k provided to protrude backward from the lower part of the second recessed portion 569h.

[0325] The first engagement protrusion 569g and the second engagement protrusion 569k are formed in the center of the second battery BT1b in the body width direction K2 and are formed as long protrusions along the body width direction K2.

[0326] As shown in Fig. 93, the battery stand 566 has a mounting base 571 and a regulating plate (regulating member) 572 fixed to the front part of the mounting base 571. The mounting base 571 is formed by bending a single plate material, and has a mounting wall 571a, a vertical support wall 571b, and an attachment wall 571c. As shown in Figs. 96 and 99, the battery BT1 (first battery BT1a and second battery BT1b) is mounted on the mounting wall 571a with a cushion material 574 interposed therebetween.

[0327] 93, the mounting wall 571a has a left fastener insertion hole 583a formed through the left part and a right fastener insertion hole 583b formed through the right part. The fastener insertion holes 583a and 583b are formed as elongated holes that are long in the front-rear direction. The mounting wall 571a also has a fastener attachment part 584 at the rear and in the center in the machine body width direction K2.

[0328] 93, the fixture attachment portion 584 has a first insertion hole 585a and a second insertion hole 585b. The first insertion hole 585a and the second insertion hole 585b are formed by vertically penetrating the mounting wall 571a. The first insertion hole 585a and the second insertion hole 585b are formed side by side in the body width direction K2.

[0329] 94, the fastener attachment portion 584 has a first nut 586A and a second nut 586B. The first nut 586A corresponds to the first insertion hole 585a, and the second nut 586B corresponds to the second insertion hole 585b.

[0330] As shown in Fig. 94, the left side (one end side) of the mounting wall 571a is attached to a mounting wall mounting portion 573 provided on the body 2. The mounting wall mounting portion 573 includes a receiving wall 18a to which the front part of the mounting wall 571a is attached, and a mounting stay 564 to which the rear part of the mounting wall 571a is attached. The receiving wall 18a is integrally formed on the right side of the support bracket 18. The mounting stay 564 is fixed to the second frame portion 557 of the frame member 206, as described above.

[0331] 93, the vertical support wall 571b extends downward from the right end (other end) of the mounting wall 571a. The mounting wall 571c extends outward from the lower end of the vertical support wall 571b and is fixed with bolts to the vertical support wall mounting portion 42a of the swivel base plate 42 (machine body 2).

[0332] As shown in FIG. 93, the regulating plate 572 is made of a plate material, is disposed on the front side of the upper surface of the mounting wall 571a, and is fixed to the mounting wall 571a by welding or the like.

[0333] As shown in FIG. 95, the regulating plate 572 has a main plate portion 576 that is erected on the mounting wall 571a and extends in the body width direction K2, a first side plate portion 577 that extends rearward from one end (left end) of the main plate portion 576, and a second side plate portion 578 that extends rearward from the other end (right end) of the main plate portion 576.

[0334] As shown in Fig. 95, the main plate portion 576 has a first restricting portion (restricting portion) 579, a second restricting portion (restricting portion) 580, and an inclined portion 581. The first restricting portion 579 has one end portion 579a, the other end portion 579b, and a connecting portion 579c arranged with the plate surface facing the front-rear direction K1. The one end portion 579a forms a left portion of the main plate portion 576. The other end portion 579b forms a right portion of the main plate portion 576. The connecting portion 579c connects upper portions of the one end portion 579a and the other end portion 579b.

[0335] The second restricting portion 580 is formed between one end portion 579a and the other end portion 579b. The second restricting portion 580 is formed by cutting and raising the plate material constituting the main plate portion 576. More specifically, the second restricting portion 580 is formed by cutting and raising the main plate portion between a left notch 582a formed in the main plate portion 576 from the lower end toward the upper side and a right notch 582b formed similarly to the notch 582a. The second restricting portion 580 has an upper portion 580a whose upper end is connected to the connecting portion 579c and which moves forward as it goes downward, and a lower portion 580b which extends downward from the lower end of the upper portion 580a.

[0336] The inclined portion 581 is formed in an inclined shape that transitions forward as it extends upward from the one end portion 579a, a part of the other end portion 579b, and the connecting portion 579c.

[0337] Next, the installation of the first battery BT1a will be described.

[0338] 91 and 96, the main plate portion 576 corresponds to the front surface of the first battery BT1a, and the lower portion of the front surface 567a of the first battery BT1a engages (abuts) with the cushion material 575. This restricts the forward movement (movement toward the front surface) of the first battery BT1a.

[0339] The first side plate 577 engages with the lower part of the left side surface of the first battery BT1a via a cushioning material, and the second side plate 578 engages with the lower part of the right side surface of the first battery BT1a via a cushioning material, thereby restricting movement of the first battery BT1a in the body width direction K2.

[0340] As shown in FIG. 91, the first battery BT1a is held down from the upper surface side by the first fixing tool 587 and fixed to the battery stand 566 (mounting wall 571a). To explain in detail, the first fixing tool 587 has an attachment stay 587, a first rod member 589A, and a second rod member 589B. The attachment stay 587 is formed in an angle shape and abuts against a corner portion between the upper surface 567c and the back surface 567b of the first battery BT1a. The upper part of the first rod member 589A penetrates the left part of the attachment stay 587, and the lower part of the first rod member 589A penetrates the fixing tool insertion hole 577 and engages with the lower surface of the mounting wall 571a. The upper part of the second rod member 589B penetrates the right part of the attachment stay 587, and the lower part of the second rod member 589B penetrates the fixing tool insertion hole 578 and engages with the lower surface of the mounting wall 571a. Fixing nuts 590 are screwed onto male threads formed on the upper portions of the first rod member 589A and the second rod member 589B. By tightening the fixing nuts 590, the first battery BT1a is pressed from the upper surface side against the first restricting portion 579 and the mounting wall 571a and fixed (attached) to the battery stand 566.

[0341] Next, the installation of the second battery BT1b will be described.

[0342] As shown in Figs. 97 and 99, the main plate portion 576 corresponds to the front surface 569a of the second battery BT1b. The first engagement protrusion 569g of the second battery BT1b fits into the rear side of the second restriction portion 580. The lower portion of the front surface 569a of the second battery BT1b engages (abuts) with the connection portion 579c and the second restriction portion 580 via the cushion material 575. This restricts the second battery BT1b from moving forward (toward the front surface). Additionally, the upper portion 580a of the second restriction portion 580 restricts the second battery BT1b from moving upward.

[0343] The first side plate 577 engages with the lower part of the left side surface of the second battery BT1b via a cushioning material, and the second side plate 578 engages with the lower part of the right side surface of the second battery BT1b via a cushioning material, thereby restricting movement of the second battery BT1b in the body width direction K2.

[0344] 98, the fixture attachment portion 584 is located behind the second engagement protrusion 569k when the second battery BT1b is placed on the mounting wall 571a and the first engagement protrusion 569g is inserted into the rear surface side of the second restriction portion 580. A second fixture 591 is attached to the fixture attachment portion 584.

[0345] 99, the second fixture 591 has a base 591a and a pressing portion 591b. The base 591a is placed on the fixture mounting portion 584 (mounting wall 571a) and attached to the fixture mounting portion 584 by a first bolt 592A and a second bolt 592B. Specifically, the first bolt 592A is inserted through the base 591a and the first insertion hole 585a and screwed into the first nut 586A. The second bolt 592B is inserted through the base 591a and the second insertion hole 585b and screwed into the second nut 586B.

[0346] 99, the pressing portion 591b is formed in an inclined shape that transitions upward as it moves forward from the front end of the base portion 591a, and abuts against the upper surface of the second engagement protrusion 569k. As a result, the second fixing device 591 presses the second engagement protrusion 569k, restricting the rearward movement (movement toward the back side) and upward movement of the second battery BT1b.

[0347] The second battery BT1b is fixed (attached) to the battery stand 566 by having its forward movement restricted by the main plate portion 576, its forward and upward movement restricted by the second restricting portion 580, and its rearward and upward movement restricted by the second fixing device 591.

[0348] As described above, the first battery BT1a and the second battery BT1b can be selectively attached to the battery stand 566 (machine body 2). That is, the work machine 1 can be used as both a work machine with a first battery attachment specification and a work machine with a second battery attachment specification.

[0349] Since the inclined portion 581 is inclined so as to move forward as it goes upward, it is possible to guide the lower front end of the battery BT1 to the rear side of the main plate portion 576 when placing the battery BT1 on the mounting wall 571a from above.

[0350] As shown in Fig. 100, the tank stand 424 is fixed to the midway point in the front-rear direction on the right side of the revolving frame 41 (machine body 2). As shown in Fig. 101, a flange plate 596 is provided at the bottom of the hydraulic oil tank T2. The flange plate 596 is fixed to the lower surface of the hydraulic oil tank T2 by welding. The flange plate 596 is also provided so as to protrude from the bottom of the hydraulic oil tank T2.

[0351] As shown in Fig. 101, a fixing portion 596a is provided at the rear of the flange plate 596. A fixing portion 596b and a fixing portion 596c are provided at the right side of the flange plate 596. The fixing portion 596b is provided at the right front side of the flange plate 596, and the fixing portion 596c is provided at the right rear side of the flange plate 596. As shown in Fig. 102, a fixing portion 596d is provided at the front side of the left side of the flange plate 596. As shown in Fig. 101, a fixing portion 596e is provided at the rear side of the left side of the flange plate 596.

[0352] As shown in Figs. 101 to 103, the tank stand 424 has a plurality of support legs (first support leg 424C, second support leg 424D, third support leg 424E) that support the tank mounting plate 424A, in addition to the tank mounting plate 424A and the support plate 424B described above. The first support leg 424C to the third support leg 424E are disposed below the tank mounting plate 424A and welded to the rotating frame 41 (rotating base plate 42) and the tank mounting plate 424A. The first support leg 424 is disposed in the front part of the left end side of the tank mounting plate 424A and to the right of the front rib 232R of the second rib 43R. The second support leg 424D is disposed in the right front part of the tank mounting plate 424A. The third support leg 424E is disposed in the right rear part of the tank mounting plate 424A and behind the support plate 424B.

[0353] 104, the support plate 424B is formed of a thick plate material that is thicker than the tank mounting plate 424A. The support plate 424B is disposed so that the plate surface faces the front-rear direction K1 (horizontal direction) and is fixed by welding to the revolving frame 41. In other words, the support plate 424B is erected on the revolving frame 41 with the plate thickness direction coinciding with the front-rear direction K1.

[0354] As shown in FIG. 103, the tank mounting plate 424A is disposed so that the plate surface faces the up-down direction, and is fixed in contact with the upper ends of the support plate 424B and the plurality of support legs 424C-424E. The tank mounting plate 424A has a joint surface 424a formed along the length direction (body width direction K2) of the upper end surface 424b of the support plate 424B at the rear end side (one end in the direction along the plate surface). This joint surface 424a is located in the middle (center) of the plate thickness direction of the upper end surface 424b of the support plate 424B. In this embodiment, the joint surface 424a is located in the center of the plate thickness direction of the upper end surface 424b, and the rear end side of the tank mounting plate 424A is placed on the front side of the upper end surface 424b of the support plate 424B.

[0355] 104, the joint surface 424a is joined to an upper end surface 424b of the support plate 424B by welding 598. In this way, the tank mounting plate 424A and the support plate 424B are connected to each other.

[0356] As shown in Fig. 103, the tank mounting plate 424A has a mounting piece 424c that protrudes rearward from the joint surface 424a on the left side of the rear part. The mounting piece 424c protrudes rearward beyond the support plate 424B. As shown in Fig. 101, a fixing portion 596a of a flange plate 596 is overlapped with the mounting piece 424c, and the mounting piece 424c and the fixing portion 596a are fixed by a bolt 599A.

[0357] 103, the tank mounting plate 424A has a mounting portion 424d at the front of the right part and a mounting portion 424e at the rear of the right part. The mounting portion 424d and the mounting portion 424e protrude rightward from the support plate 424B. The rear part of the mounting portion 424e protrudes rearward from the joint surface 424a.

[0358] 101, fixing portion 596b of flange plate 596 is placed on mounting portion 424d, and mounting portion 424d and fixing portion 596b are fixed by bolts 599B. Furthermore, fixing portion 596c of flange plate 596 is placed on mounting portion 424e, and mounting portion 424e and fixing portion 596c are fixed by bolts 599C and 599D.

[0359] As shown in FIG. 103, the tank mounting plate 424A has a mounting portion 424g at the front left portion and a mounting portion 424h at the rear left portion.

[0360] 102, fixing portion 596d of flange plate 596 is placed on mounting portion 424g, and mounting portion 424g and fixing portion 596d are fixed by bolts 599E. Moreover, fixing portion 596e of flange plate 596 is placed on mounting portion 424h, and mounting portion 424h and fixing portion 596e are fixed by bolts 599F.

[0361] According to the above configuration, by disposing the joint surface 424a of the tank mounting plate 424A on the upper end surface 424b of the support plate 424B and joining the joint surface 424a and the upper end surface 424b by welding, welding distortion in a downward direction does not act on the rear part of the tank mounting plate 424A, and welding distortion of the tank mounting plate 424A can be reduced. Also, the tank mounting plate 424A and the support plate 424B can be joined by welding from above, which makes welding easy, thereby improving production efficiency.

[0362] 101, the rear rib 233R of the second rib 43R is fixed to the left part of the rear surface of the support plate 424B. Further, a through hole 601 for passing a wiring member 600 such as a harness is formed in the left part of the rear surface of the support plate 424B.

[0363] 105 to 113 show other embodiments of the work machine 1. FIG.

[0364] As shown in FIG. 105, the work machine 1 according to the other embodiment includes a connector 605 that connects one end side (front end side) and the other end side (rear end side) of the fitting bracket 453 and the support bracket 445. In detail, as shown in FIG. 105 and FIG. 106, the connector 605 includes a connector (first connector) 605A that connects the front end sides of the fitting bracket 453 and the support bracket 445, and a connector (second connector) 605B that connects the rear end sides of the support bracket 445 and the fitting bracket 453. The first connector 605A connects the support bracket 445 and the fitting bracket 453 at the front end side of the oil cooler O1. The second connector 605B connects the support bracket 445 and the fitting bracket 453 at the rear end side of the radiator R1.

[0365] As shown in FIG. 106, the fitting bracket 453 has a first connecting piece 606 provided on the front end side and the rear end side. More specifically, the first connecting piece 606 includes a front-side first connecting piece 606A integrally formed on the front end side of the fitting bracket 453, and a rear-side first connecting piece 606B integrally formed on the rear end side of the fitting bracket 453. The support bracket 445 has a second connecting piece 607 provided on the front end side and the rear end side. More specifically, the second connecting piece 607 includes a front-side second connecting piece 607A integrally formed on the front end side of the support bracket 445, and a rear-side second connecting piece 607B integrally formed on the rear end side of the support bracket 445.

[0366] As shown in FIG. 107 and FIG. 108, the first connecting piece 606 and the second connecting piece 607 are formed in a plate shape with the plate surface facing the up-down direction. The first connecting piece 606 has a first groove 608. More specifically, the first groove 608 includes a front-side first groove 608A formed in the first connecting piece 606A and having a forward opening, and a rear-end side first groove 608B formed in the first connecting piece 606B and having a right-side opening. The second connecting piece 607 has a second groove 609. More specifically, the second groove 609 includes a front-side second groove 609A formed in the second connecting piece 607A and having a forward opening, and a rear-end side second groove 609B formed in the second connecting piece 607B and having a right-side opening. In addition, the first connecting piece 606A and the first connecting piece 606B have an insertion hole 610 formed in a penetrating shape in the up-down direction. Further, the second connecting piece 607A and the second connecting piece 607B have an insertion hole 611 formed to penetrate therethrough in the up-down direction.

[0367] As shown in FIG. 107 and FIG. 108, the connecting body 605 has a vertical member 612, a first contact portion 613, a second contact portion 614, a first fastener 615, and a second fastener 616. The vertical member 612 is formed of a plate material and is provided across the first connecting piece 606 and the second connecting piece 607. The vertical member 612 is formed into an L-shaped planar section by a first wall 617 and a second wall 618 extending from the first wall 617. In the first connecting body 605A, the plate surface of the first wall 617 faces the aircraft width direction K2, and the second wall 618 extends rightward from the rear end of the first wall 617. In the second connecting body 605B, the plate surface of the first wall 617 faces the front-rear direction K1, and the second wall 618 extends rearward from the left end of the first wall 617.

[0368] The vertical member 612 has a first protrusion 619 at its upper portion that fits into the first groove 608, and a second protrusion 620 at its lower portion that fits into the second groove 609. In detail, the first protrusion 619 includes a first protrusion 619A provided on the vertical member 612A of the first connecting body 605A and fitting into the first groove 608A, and a first protrusion 619B provided on the vertical member 612B of the second connecting body 605B and fitting into the first groove 608B. The second protrusion 620 includes a second protrusion 620A provided on the vertical member 612A and fitting into the second groove 609A, and a second protrusion 620B provided on the vertical member 612B and fitting into the second groove 609B.

[0369] The first contact portion 613 and the second contact portion 614 are formed in a disk ring shape. The first contact portion 613 is fixed to the upper portion of the vertical member 612. More specifically, the first contact portion 613 is fixed to the upper surface of the second wall 618 and the upper surface of the first wall 617 continuous with the upper surface. The first contact portion 613 is formed with a first notch 621 for avoiding interference with the first protruding piece 619. The first contact portion 613 contacts the lower surface of the first connecting piece 606.

[0370] The second abutment portion 614 is fixed to the lower part of the vertical member 612. More specifically, the second abutment portion 614 is fixed to the lower surface of the second wall 618 and the lower surface of the first wall 617 continuous with the lower surface. A second notch 622 is formed in the second abutment portion 614 to avoid interference with the second protruding piece 620. In addition, the second abutment portion 614 abuts against the upper surface of the second connecting piece 607.

[0371] The first contact portion may be configured at the upper end of the vertical member 612, and the second contact portion may be configured at the upper end of the vertical member 612.

[0372] The first fastener 615 is a member that attaches the vertical member 612 to the first connecting piece 606. The first fastener 615 has a first bolt member 623 and a first nut member 624. The first bolt member 623 is formed in a rod shape and has a male thread portion 625 at the upper portion. The first bolt member 623 is inserted through the first abutment portion 613, and the lower portion is fixed to the upper portion of the vertical member 612. More specifically, the first bolt member 623 is fixed to the corner portion of the first wall 617 and the second wall 618. The male thread portion 625 of the first bolt member 623 protrudes upward from the first abutment portion 613 and passes through the insertion hole 610 of the first connecting piece 606. The upper portion of the vertical member 612 is attached to the first connecting piece 606 by screwing the first nut member 624 into the male thread portion 625 of the first bolt member 623.

[0373] The second fastener 616 is a member that attaches the vertical member 612 to the second connecting piece 607. The second fastener 616 has a second bolt member 626 and a second nut member 627. The second bolt member 626 is formed in a rod shape and has a male thread portion 628 at the lower portion. The second bolt member 626 is inserted through the second abutting portion 614, and the upper portion is fixed to the lower portion of the vertical member 612. In detail, the second bolt member 626 is fixed to the second wall 618 and the corner portion of the second wall 618. The male thread portion 628 of the second bolt member 626 protrudes downward from the second abutting portion 614 and passes through the insertion hole 611 of the second connecting piece 607. The lower portion of the vertical member 612 is attached to the second connecting piece 607 by screwing the second nut member 627 into the male thread portion 628 of the second bolt member 626.

[0374] 106, a rectangular structure is formed by the support bracket 445, the fitting bracket 453, the first connector 605A, and the second connector 605B. As a result, the first connector 605A and the second connector 605B can reinforce the support bracket 445 and the fitting bracket 453, improving their strength.

[0375] Furthermore, by disposing the vertical member 612 between the first connecting piece 606 and the second connecting piece 607, and by abutting the first abutting portion 613 against the lower surface of the first connecting piece 606 and the second abutting portion 614 against the upper surface of the second connecting piece 607, it is possible to regulate the vertical distance between the fitting bracket 453 and the support bracket 445. The shroud 425 is attached to the fitting bracket 453 and the support bracket 445, and since the distance between the fitting bracket 453 and the support bracket 445 can be regulated by the first connecting body 605A and the second connecting body 605B, it is possible to improve the dimensional accuracy of the attachment of the fitting bracket 453 and the support bracket 445 to the shroud 425.

[0376] 105, in another embodiment, the fuel cooler N1 is arranged sideways at the lower front part of the shroud 425. This improves the ventilation of the cooling air to the condenser G3, and improves the heat balance of the condenser G3.

[0377] 109, a mounting frame 472 for mounting the fuel cooler N1 is provided on the lower part of the connecting frame 459. The mounting frame 472 has a support rod 629 and a mounting stay 630.

[0378] The support rod 629 has a first portion 629a fixed to the lower part of the front frame material 459C, a second portion 629b extending downward from the right end of the first portion 629a, a third portion 629c extending rearward from the lower end of the second portion 629b, a fourth portion 629d extending upward from the rear end of the third portion 629c, and a fifth portion 629e extending leftward from the upper end of the fourth portion 629d and fixed to the first portion 467a of the lower frame material 459B.

[0379] The mounting stay 630 has a first mounting stay 630A fixed to the second portion 629b and a second mounting stay 630B fixed to the fourth portion 629d.

[0380] The fuel cooler N1 is attached to a first mounting stay 630A and a second mounting stay 630B by means of a bolt 631 and a nut screwed onto the bolt 631.

[0381] 110 to 112 show an arrangement portion of fan cover 632 disposed on the rear side of cooling fan F1. Fan cover 632 is disposed near the left side and on the rear side of shroud 425. Fan cover 632 is formed from a plate material, and has a first plate portion 632a, a second plate portion 632b, a third plate portion 632c, a fourth plate portion 632d, and a fifth plate portion 632e.

[0382] The first plate portion 632a is disposed to the side (right) of the lower portion 58c of the second rear leg 58R with the plate surface facing the front-rear direction, and is attached to a stay 634 fixed to the lower portion 58c by a bolt 633 or the like. The second plate portion 632b extends in an inclined direction that changes forward as it goes upward from the upper end of the first plate portion 632a, and then extends forward. The upper portion of the second plate portion 632b is located above the upper end of the shroud main body 541. The third plate portion 632c extends in an inclined direction that changes forward as it goes downward from the lower end of the first plate portion 632a. The fourth plate portion 632d is formed so that the plate surface faces the aircraft width direction K2, and its rear end is connected to the right end of the first plate portion 632a, and its upper end is connected to the right end of the second plate portion 632b. The fourth plate portion 632d is disposed at a distance from the left side of the upper rear portion of the shroud 425, and is disposed at a position that does not obstruct the air passage of the cooling air. The fourth plate portion 632d has a number of ventilation holes 639. The fifth plate portion 632e extends in an inclined direction that transitions to the right as it goes downward from the lower end of the fourth plate portion 632d, and then extends downward. The fifth plate portion 632e is fixed to the front surface of the third plate portion 632c, and reinforces the third plate portion 632c. The fan cover 632 functions as a guard for the cooling fan F1 and also functions as a guide member for the cooling air.

[0383] Fig. 113 shows a right side view of the arrangement portion of the closure plate 442. Fig. 114 shows a plan view of the arrangement portion of the closure plate 442. The closure plate 442 has a base portion 442b bolted to the swivel base plate 42, a closure portion 442c extending upward from the right end of the base portion 442b, a rear wall portion 442d extending outward (to the right) from the rear end of the closure portion 442c, and a rear upper wall portion 442e extending outward from the aircraft body from the rear side of the through portion 442a in the closure portion 442c.

[0384] A guide member 636 that guides a fuel hose 635 routed through the through-portion 442a is fixed to the base portion 442b. A front end portion 442f of the blocking portion 442c is disposed on the inside of the aircraft of a rear portion 439b of the vertical plate portion 439. A rear surface of the rear wall portion 442d serves as a seal contact surface that contacts a seal material (sound absorbing material) 637 provided between the rear wall portion 442d and the weight support 44. An upper surface of the rear upper wall portion 442e serves as a seal contact surface that contacts a trim seal 638 provided on the lower edge of the extension portion 439d of the vertical plate portion 439 and a seal material 550 (see FIG. 56) attached to a seal mounting wall 551 of the shroud 425.

[0385] When replacing the fuel hose 635, it is necessary to remove the blocking plate 442. However, since the front end 442f of the blocking portion 442c is located on the inside side of the aircraft body of the rear portion 439b of the vertical plate portion 439, the blocking plate 442 cannot be removed to the outside of the aircraft body in this state. Therefore, in order to remove the blocking plate 442, first, the fixing of the base portion 442b to the rotating base plate 42 is released, and the blocking plate 442 is moved in the direction of the arrow S1 (rearward) in FIG. 114. Then, the sealing material 637 is elastically deformed, so that the front end 442f of the blocking portion 442c comes off rearward from the rear portion 439b of the vertical plate portion 439. This allows the blocking plate 442 to be removed to the outside of the aircraft body.

[0386] The other configurations of the other embodiment are configured similarly to the above-described first embodiment.

[0387] The working machine of this embodiment has the following advantages.

[0388] The work machine 1 comprises a swivel frame 41 supported on the traveling device 3 so as to be rotatable around a vertical axis (swivel axis X1), a swivel joint 334 arranged at the vertical axis position and inserted through an opening hole (first opening hole 321) formed in the swivel frame 41, and a blocking cover 343 attached to the swivel frame 41 and abutting against the swivel joint via a sealing member 348 to cover the gap between the opening hole and the swivel joint 334.

[0389] According to this configuration, the blocking cover 343 can prevent foreign matter from falling between the swivel joint 334 and the opening of the revolving frame 41.

[0390] In addition, the blocking cover 343 has a cover plate 349 which has a cutout edge portion 352 which faces the outer peripheral surface 336b of the swivel joint 334 at a distance and covers the opening hole, and the sealing member 348 protrudes from the cutout edge portion 352 towards the outer peripheral surface 336b of the swivel joint 334 and abuts against the outer peripheral surface 336b.

[0391] According to this configuration, the gap between the opening hole and the swivel joint 334 can be covered satisfactorily.

[0392] In addition, the cover plate 349 has a first plate material 355 and a second plate material 356 arranged to sandwich the swivel joint 334 between the first plate material 355, and the sealing member 348 has a first sealing material 348A attached to the first plate material 355 and a second sealing material 348B attached to the second plate material 356.

[0393] According to this configuration, with the swivel joint 334 in place, the blocking cover 343 can be attached later.

[0394] In addition, the cover plate 349 has a notch groove 354 to avoid interference with a pipe fitting 353 that is selectively attached to the swivel joint 334, and the blocking cover 343 has an auxiliary cover 350 that can cover the notch groove 354 when the pipe fitting 353 is not attached.

[0395] This configuration makes it possible to accommodate the case where a hydraulic actuator is attached as an option.

[0396] The swivel joint 334 also has an outer sleeve 335 attached to the traveling device 3, and an inner shaft 336 that is inserted through an opening hole and rotatably inserted into the outer sleeve 335 around the vertical axis and whose rotation relative to the swivel frame 41 is restricted, and the blocking cover 343 covers the gap between the opening hole and the inner shaft 336.

[0397] According to this configuration, the blocking cover 343 can prevent foreign matter from falling between the inner shaft 336 and the opening hole of the revolving frame 41.

[0398] The swivel joint 334 also has a locking member 344 attached to the swivel frame 41, and an engaging member 338 provided on the inner shaft 336 which engages with the locking member 344 to regulate the rotation of the inner shaft 336 relative to the swivel frame 41. The first plate material 355 has a first edge portion 355a facing the locking member 344 in a circumferential direction C6 centered on the vertical axis, and the second plate material 356 has a second edge portion 356a which sandwiches the locking member 344 between itself and the first edge portion 355a in the circumferential direction C6.

[0399] According to this configuration, the gap between the opening hole and the swivel joint 334 at the attachment portion of the locking member 344 can be covered satisfactorily.

[0400] Additionally, the outer sleeve 335 has a receiving portion 335a at its upper portion, the inner shaft 336 has a mounting portion 336a supported by the receiving portion 335a, and the swivel joint 334 is provided with a seal cover 358 that covers the space between the receiving portion 335a and the mounting portion 336a.

[0401] According to this configuration, it is possible to prevent foreign matter such as dust, water, oil, etc. from entering into the swivel joint 334 through the joint between the inner shaft 336 and the outer sleeve 335 .

[0402] The working machine 1 also includes a swivel base 42 supported on the traveling device 3 so as to be rotatable around a vertical axis (swivel axis X1), a weight 46 provided at the rear of the swivel base 42, and a weight support 44 to which the weight 46 is attached. The weight support 44 is formed from a thick plate material that is thicker than the swivel base 42 and is fixed onto the swivel base 42, and has a weight support surface 361 on which the weight 46 is placed and supported.

[0403] According to this configuration, by placing the weights 46 on the weight supports 44 made of thick plate material provided on the swivel base plate 42, the assembly accuracy of the weights 46 can be improved with a simple configuration.

[0404] Furthermore, the weight support 44 has a mounting hole (first mounting hole 362) into which a bolt (first mounting bolt 363) for mounting the weight 46 is screwed so as to pass horizontally through the weight 46.

[0405] According to this configuration, since the weights 46 are placed on the weight supports 44 made of thick plate material, it is possible to effectively suppress shear stress acting on the bolts that attach the weights 46. Also, since there is no distortion in the surface on which the weights 46 are placed, it is possible to achieve high precision in the height of the weights 46.

[0406] In addition, the weight support 44 is formed from one side to the other side of the swivel base 42 in the body width direction K2, and the weight support surface 361 includes a first support surface 361L provided on one side of the weight support 44 in the body width direction K2 and a second support surface 361R provided on the other side of the body width direction K2, and the mounting holes include a first screw hole 362A provided on one side of the weight support 44 in the body width direction K2 and a second screw hole 362B provided on the other side of the body width direction K2.

[0407] According to this configuration, the weight 46 can be supported in a well-balanced manner by the first support surface 361L and the second support surface 361R in the body width direction K2.

[0408] It also has a weight support member 45 erected on the weight support 44, and the weight support member 45 has another mounting hole (second mounting hole 366) at the upper back surface, into which another bolt (second mounting bolt 365) penetrates horizontally through the weight 46 and is screwed.

[0409] According to this configuration, it is possible to effectively suppress the shear stress acting on the other bolts that attach the weight 46.

[0410] It also includes a prime mover E1 mounted on the rear of the swivel base 42, and support bases (third support base 50C, fourth support base 50D) fixed onto the weight support 44 and supporting the prime mover E1.

[0411] According to this configuration, the support base can be fixed to the swivel base plate 42 together with the weight support 44, thereby improving ease of assembly.

[0412] It also includes a prime mover E1 mounted on the rear of the swivel base 42, a bonnet 22 covering the prime mover E1, a support frame 11 supporting the bonnet 22, and a frame mounting portion (fourth frame mounting portion 55D) fixed onto the weight support 44 and to which the support frame 11 is attached.

[0413] According to this configuration, the frame mounting portion can be fixed to the swivel base plate 42 together with the weight support 44, thereby improving ease of assembly.

[0414] The work machine 1 comprises a body 2, a prime mover E1 mounted on the body 2, a driver's seat 6 arranged in front of the prime mover E1 and supported on the body 2 so as to be movable back and forth, a first stopper 98L and a second stopper 98R provided on the driver's seat 6 at a distance in the body width direction K2, a first abutment member 99L with which the first stopper 98L abuts when the driver's seat 6 is moved rearward, and a second abutment member 99R with which the second stopper 98R abuts, and a partition member 22A separating the prime mover chamber E2 that accommodates the prime mover E1 from the area on the driver's seat 6 side, the partition member 22A having an inspection opening 71 for accessing the prime mover chamber E2 and a blocking plate 72 that blocks the inspection opening 71, and the first abutment member 99L and the second abutment member 99R are provided on the blocking plate 72.

[0415] According to this configuration, the inspection opening 71 can be formed without being restricted by the first contact member 99L and the second contact member 99R, and the opening area of ​​the inspection opening 71 can be made large.

[0416] Further, an opening width W3 of the inspection opening 71 in the aircraft width direction K2 is wider than a width W4 between the first contact member 99L and the second contact member 99R in the aircraft width direction K2.

[0417] According to this configuration, the engine compartment E2 can be easily inspected through the inspection opening 71 having a wide opening width W3.

[0418] Also, a rail device (second rail device 86) is provided to support the driver's seat 6 so that it can move back and forth, and the closing plate 72 has an avoidance recess 108 to avoid interference with the rail device.

[0419] According to this configuration, the driver's seat 6 can be brought closer to the partition member 22A, and thus the space in front of the driver's seat 6 can be made larger.

[0420] In addition, the partition member 22A has a partition body 67 including a first portion 67A which is an upper portion and a second portion 67B which is a lower portion, and the first portion 67A has an inspection opening 71 and is formed in an inclined shape that transitions rearward as it moves upward from the upper end of the second portion 67B.

[0421] According to this configuration, the inside of the motor chamber E2 can be inspected from diagonally above, which facilitates maintenance.

[0422] The partition member 22A also has a partition main body 67 having an inspection opening 71 and a plate mounting portion 371 to which a blocking plate 72 is attached by a fixing bolt, and an edge seal 372 that seals between the seal contact surface 22a around the inspection opening 71 in the partition main body 67 and the outer periphery of the blocking plate 72 corresponding to the seal contact surface 22a, and the plate mounting portion 371 is integrally formed with the partition main body 67 so that the plate contact surface 371a against which the blocking plate 72 abuts is positioned forward of the seal contact surface 22a.

[0423] According to this configuration, the partition member 22A can be easily formed.

[0424] The work machine 1 also includes a body 2, a driver's seat 6 arranged in front of the prime mover E1, a movable body 85 which supports the driver's seat 6 and is supported on the body 2 so that its fore-aft position can be adjusted, the hydraulic hose 368 arranged on the rear side of the movable body 85, and a partition member 22A which separates the prime mover chamber E2 which houses the prime mover E1 from the area on the driver's seat 6 side, and the partition member 22A has an escape recess 376 which is recessed toward the rear and which accommodates the hydraulic hose 368.

[0425] According to this configuration, it is possible to prevent the hydraulic hose 368 from being pinched between the partition member 22A and the movable body 85 without increasing the size of the interior space of the cabin.

[0426] Also, a rail device (first rail device 84) is provided that supports movable body 85 so that it can move back and forth, and escape recess 376 constitutes a recess that avoids interference with the rail device.

[0427] According to this configuration, the structure of the partition member 22A can be simplified, and the space in front of the driver's seat 6 can be made larger.

[0428] In addition, the driver's seat 6 is provided with a first stopper 98L and a second stopper 98R spaced apart in the aircraft width direction K2, and the partition member 22A has a first abutment member 99L with which the first stopper 98L abuts and a second abutment member 99R with which the second stopper 98R abuts when the movable body 85 is moved rearward, and the escape recess 376 is located below the first abutment member 99L and the second abutment member 99R and is formed with a length extending from the first abutment member 99L side to the second abutment member 99R side.

[0429] With this configuration, interference with the hydraulic hose can be sufficiently prevented.

[0430] In addition, the movable body 85 is provided with another rail device (second rail device 86) that supports the driver's seat 6 so that it can move back and forth, and the partition member 22A has an avoidance recess 108 provided between the first abutment member 99L and the second abutment member 99R to prevent interference with the other rail device.

[0431] Also, an operating lever 77L may be provided on the movable body, and the hydraulic hose 368 may be connected to the operating lever 77L.

[0432] The working machine 1 also includes a prime mover E1, a cooling fan F1 that generates cooling air to cool the prime mover E1, an exhaust gas purification device D1 that purifies the exhaust gas discharged from the prime mover E1, and a sedimenter 381 that separates and removes moisture mixed in the fuel of the prime mover E1, and the sedimenter 381 is disposed on the downwind side of the cooling air from the exhaust gas purification device D1 and in a position overlapping with the exhaust gas purification device D1 in the machine width direction K2.

[0433] According to this configuration, the cooling air is prevented from directly hitting the sedimenter 381, and waxing of the fuel can be prevented.

[0434] Also, a sedimenter cover 383 is provided to provide a shield between the sedimenter 381 and the exhaust gas purification device D1.

[0435] According to this configuration, the sedimenter cover 383 can prevent the fuel temperature from rising too high, and the sedimenter 381 can be disposed compactly close to the exhaust gas purification device D1.

[0436] In addition, the sedimenter cover 383 can be attached and detached separately from the sedimenter 381.

[0437] This configuration allows the sedimenter cover 383 to be installed or removed depending on the situation.

[0438] The vehicle also includes an aircraft body 2 on which a prime mover E1 is mounted, and a fuel tank T1 for storing fuel for the prime mover E1. An exhaust gas purification device D1 and a sedimenter 381 are provided on one side of the prime mover E1, a cooling fan F1 is provided on the other side of the prime mover E1, and the fuel tank T1 is disposed on one side and forward of the prime mover E1.

[0439] This configuration makes it easy to arrange the fuel pipe from the fuel tank T1 to the sedimenter 381. In addition, the fuel pipe can be shortened.

[0440] The vehicle also includes a bonnet rear portion 22B that covers the rear of the prime mover E1 in an openable and closable manner, and a fuel filter F2 that is arranged behind the prime mover E1, and a sedimenter 381 is arranged to the side of the exhaust gas purification device D1 at a midpoint in the fore-and-aft direction.

[0441] According to this configuration, by opening the bonnet rear portion 22B, maintenance of the sedimenter 381 and the fuel filter F2 can be performed from one side from the rear.

[0442] It also includes a fuel cooler N1 for cooling the fuel, a reflux valve 386 for switching the return fuel from the prime mover E1 between a state in which it is sent to the sedimenter 381 and a state in which it is sent to the fuel cooler N1, a check valve 387 for preventing the backflow of fuel from the reflux valve 386, and a bracket member 389 for mounting the reflux valve 386 and the check valve 387, and the bracket member 389 is disposed below the fuel filter F2.

[0443] According to this configuration, the recycle valve 386 and the check valve 387 can be sub-assembled to the bracket member 389 and attached to the aircraft body 2, and by opening the rear bonnet portion 22B, the recycle valve 386 and the check valve 387, together with the sedimenter 381 and the fuel filter F2, can be maintained from one side from the rear.

[0444] The work machine 1 also includes a prime mover E1, a fuel tank T1 for storing fuel for the prime mover E1, a fuel supply unit 291 connected to the fuel tank T1 and into which fuel to be replenished to the fuel tank T1 is injected and which is capable of storing the fuel, and a storage box 401 provided within the prime mover chamber E2 that accommodates the prime mover E1 and which forms a fuel supply unit accommodation chamber 291A that accommodates the fuel supply unit 291.

[0445] According to this configuration, the storage box 401 can isolate the arrangement space in which the fuel supply unit 291 is arranged from the motor chamber E2, thereby preventing the heat from the motor chamber E2 from affecting the fuel supply unit 291.

[0446] It also includes an aircraft body 2 equipped with a prime mover E1, a cabin 5 mounted on the aircraft body 2, and an exterior member 163 covering part of the cabin 5 and part of the prime mover room E2, and the storage box 401 has a box opening 402 blocked by the exterior member 163.

[0447] According to this configuration, a part of the storage box 401 can be formed by the exterior member 163 of the cabin 5, and the structure can be simplified.

[0448] In addition, the fuel supply section 291 has a sub-tank 300 capable of storing fuel, and a fuel filler port 301 for injecting fuel into the sub-tank 300, and the exterior member 163 has an opening 169 through which the fuel filler port 301 can be accessed via a box opening 402, and an opening / closing lid 170 that closes the opening 169 so that it can be opened and closed.

[0449] According to this configuration, it is possible to increase the fuel storage capacity by using the sub-tank 300. Also, the fuel filler opening 301 in the storage box 401 can be accessed.

[0450] The engine E1 also includes an exhaust gas purification device D1 that purifies the exhaust gas discharged from the engine E1, and the housing box 401 is provided adjacent to the exhaust gas purification device D1.

[0451] According to this configuration, the fuel supply unit 291 can be provided close to the exhaust gas purification device D1, and the fuel supply unit 291 can be arranged compactly.

[0452] The housing box 401 also includes a bonnet 22 that defines a motor chamber E2, and a support frame 11 that supports the bonnet 22 within the motor chamber E2. The housing box 401 has a box mounting portion 414 that is mounted to the support frame 11.

[0453] According to this configuration, the mounting position of the storage box 401 can be determined with high accuracy.

[0454] Moreover, the storage box 401 has a main member 411 attached to the support frame 11 and a sub-member 412 detachably attached to the main member 411 .

[0455] According to this configuration, the members installed inside the storage box 401 can be easily accessed.

[0456] Also provided are a connecting pipe 292 that connects the side surface of fuel tank T1 to fuel supply section 291, and a partition plate 47 that separates motor chamber E2 from the side where fuel tank T1 is arranged and has a through hole 294 through which connecting pipe 292 passes.

[0457] According to this configuration, by connecting the connecting pipe 292 to the side surface of the fuel tank T1, the connecting pipe 292 can be inserted into the through hole 294 of the partition plate. This makes it possible to simplify the partition structure between the side where the prime mover E1 is arranged and the side where the fuel tank T1 is arranged.

[0458] The working machine 1 also includes a swivel frame 41 supported on the traveling device 3 so as to be rotatable about a vertical axis (swivel axis X1), a passage member 434 which partitions a space above the swivel frame 41 and has an opening through which a hydraulic line 427 arranged on the swivel frame 41 passes, a holding member 429 which is arranged in the vicinity of the passage member 434 and covers the periphery of the hydraulic line 427 to hold the hydraulic line 427, and a sealing member 437 which seals between the passage member 434 and the holding member 429.

[0459] According to this configuration, the sealing performance around the hydraulic line 427 routed through the passage member 434 can be improved.

[0460] In addition, the passage member 434 has a first vertical wall portion (front wall 434a) and a second vertical wall portion (rear wall 434b) arranged opposite each other so as to sandwich the hydraulic pipeline 427, and a connecting wall portion (upper wall 434c) that connects the upper portions of the first vertical wall portion (front wall 434a) and the second vertical wall portion (rear wall 434b), and the sealing member 437 is provided across the first vertical wall portion (front wall 434a), the second vertical wall portion (rear wall 434b) and the connecting wall portion 434b (upper wall 434c).

[0461] According to this configuration, the sealing performance between the holding member 429 and the hydraulic line 427 can be improved with a simple structure.

[0462] In addition, there is provided a mounting plate 435 to which the passage member 434 is fixed and which is attached to the swivel frame 41 by bolts 438A and 438B, and the mounting plate 435 has vertical plate portions 439 which extend from the passage member 434 on both sides in a horizontal direction which intersects with the routing direction of the hydraulic pipeline 427.

[0463] According to this configuration, the periphery of the passage member 434 can be covered, and for example, leakage of the cooling air taken into the motor chamber E2 and leakage of noise from the motor chamber E2 can be reduced.

[0464] Also, a support base (support bracket 445) is provided on which mounted objects (radiator R1, oil cooler O1) that are attached to the mounting plate 435 and mounted on the revolving frame 41 are placed.

[0465] According to this configuration, the mounting plate 435 functions as a mounting member for the support base, and the member can be used for a dual purpose.

[0466] The vehicle also includes a prime mover E1 mounted on the rear of the revolving frame 41, and the mounted components are coolers (radiator R1, oil cooler O1) disposed on the sides of the prime mover E1.

[0467] According to this configuration, the mounting plate 435 functions as a mounting member for the support base that supports the cooler, and the member can be used for both purposes.

[0468] Further, the mounting plate 435 separates the side where the prime mover E1 is arranged from the side where the mounted object is arranged below the mounted object.

[0469] According to this configuration, the sealing performance below the load can be improved.

[0470] In addition, the rotating frame 41 has a reinforcing rib (second rib 43R) that is provided from the front to the rear and reinforces the rotating frame 41, and the reinforcing rib has an abutment portion (reinforcement portion 233a) that abuts against a sealing material (second sealing material) 441 attached to the mounting plate 435.

[0471] According to this configuration, it is possible to use the same components and simplify the structure.

[0472] The work machine 1 also includes a support bracket 445 attached to the body 2, a first mounting member (first elastic member J1 to fourth elastic member J4) formed of an elastic member and provided on the support bracket 445, a first cooler (radiator R1) and a second cooler (oil cooler O1) arranged in parallel in a direction perpendicular to the horizontal direction and placed on the support bracket 445 via the first mounting member, a fitting bracket 453 that is removably fitted to the upper parts of the first cooler and the second cooler, and second mounting members (fifth elastic member J5 to eighth elastic member J8) formed of an elastic member and interposed between the fitting bracket 453 and the first cooler and the second cooler.

[0473] According to this configuration, the first cooler and the second cooler can be removed individually by removing the fitting bracket 453. This makes it easy to replace the coolers. In addition, by mounting each of the first cooler and the second cooler via an elastic member, the mounting strength can be improved.

[0474] The first cooler has a plurality of first lower protrusions protruding downward, and the second cooler is attached to a support frame having a plurality of second lower protrusions protruding downward, and the first mounting member has a plurality of lower elastic members arranged corresponding to each of the first lower protrusions and each of the second lower protrusions and having holes through which the first lower protrusions or the second lower protrusions are inserted, and the first cooler and the second cooler are supported in a vibration-proof manner on the support bracket by inserting each of the first lower protrusions and each of the second lower protrusions into the holes of the lower elastic members.

[0475] According to this configuration, the lower parts of the first cooler and the second cooler can be positioned by the first mount member.

[0476] In addition, the first cooler has a plurality of first upper protrusions protruding upward, the support frame has a plurality of second upper protrusions protruding upward, and the second mounting member has a plurality of upper elastic members arranged corresponding to each of the first upper protrusions and each of the second upper protrusions and having holes through which the first upper protrusions or the second upper protrusions are inserted, and engaging brackets are fitted to the tops of the first cooler and the second cooler with each of the first upper protrusions and each of the second upper protrusions inserted into the holes of the upper elastic members.

[0477] According to this configuration, the upper portions of the first cooler and the second cooler can be positioned by the second mount member.

[0478] Also included are a frame member (connecting frame 459) that connects support bracket 445 and fitting bracket 453, and hangers 460A and 460B fixed to fitting bracket 453.

[0479] According to this configuration, the first cooler and the second cooler can be easily removed and attached.

[0480] The frame member also has mounting portions 459a to 459d for mounting the third cooler (condenser G3).

[0481] According to this configuration, the first cooler, the second cooler and the third cooler can be easily removed and attached.

[0482] The frame member also has a mounting frame 472 for mounting the fourth cooler (fuel cooler N1).

[0483] According to this configuration, the first cooler, the second cooler, the third cooler and the fourth cooler can be easily removed and assembled.

[0484] The cooling system further includes a prime mover E1 provided to the side of the first cooler and the second cooler, a shroud 425 provided between the prime mover E1 and the first and second coolers, and a cooling fan F1 disposed within the shroud 425 and driven by the power of the prime mover E1, the first cooler being a radiator R1 that cools the cooling water of the prime mover E1, and the second cooler being an oil cooler that cools the hydraulic oil of the hydraulic equipment, the shroud 425 having an air blowing opening 544 that opens to blow the cooling air generated by the cooling fan F1 to the prime mover E1 side, and the air blowing opening 544 and the cooling fan F1 are biased from the center of the shroud 425 to the radiator R1 side.

[0485] According to this configuration, in a structure in which the radiator R1 and the oil cooler O1 are arranged in parallel in the width direction K2 of the aircraft to the side of the prime mover E1, the prime mover E1 can be efficiently cooled.

[0486] Also, connectors 605 are provided which connect one ends of the fitting bracket 453 and the support bracket 445 together and the other ends of the fitting bracket 453 and the support bracket 445 together.

[0487] According to this configuration, by connecting one end side and the other end side of the fitting bracket 453 and the support bracket 445 with the connector 605, a rectangular structure is formed, thereby improving the strength of the fitting bracket 453 and the support bracket 445.

[0488] In addition, the mating bracket 453 has a first connecting piece 606 provided on one end side and the other end side, the support bracket 445 has a second connecting piece 607 provided on one end side and the other end side, and the connector 605 has a vertical member 612 provided across the first connecting piece 606 and the second connecting piece 607, a first fastener 615 attaching the vertical member 612 to the first connecting piece 606, and a second fastener 616 attaching the vertical member 612 to the second connecting piece 607.

[0489] According to this configuration, since the connector 605 can be removed from the fitting bracket 453 and the support bracket 445, the first cooler and the second cooler can be easily attached to and removed from the fitting bracket 453 and the support bracket 445.

[0490] In addition, the connecting body 605 has a first abutment portion 613 fixed to the upper part of the vertical member 612 and abutting the lower surface of the first connecting piece 606, and a second abutment portion 614 fixed to the lower part of the vertical member 612 and abutting the upper surface of the second connecting piece 607, the first fastener 615 has a first bolt member 623 that passes through the first abutment portion 613 and the first connecting piece 606 and is fixed to the upper part of the first vertical member 612, and a first nut member 624 that is screwed into the first bolt member 623, and the second fastener 616 has a second bolt member 626 that passes through the second abutment portion 614 and the second connecting piece 607 and is fixed to the lower part of the vertical member 612, and a second nut member 627 that is screwed into the second bolt member 626.

[0491] According to this configuration, the distance between the fitting bracket 453 and the support bracket 445 can be regulated by the connector 605. It is possible to improve the dimensional accuracy of attachment between the fitting bracket 453 and the support bracket 445 and the members attached thereto.

[0492] In addition, the first connecting piece 606 has a first groove portion 608, the second connecting piece 607 has a second groove portion 609, and the vertical member 612 has a first protrusion 619 at its upper portion that fits into the first groove portion 608, and a second protrusion 620 at its lower portion that fits into the second groove portion 609.

[0493] According to this configuration, the connector 605 can be prevented from rotating relative to the fitting bracket 453 and the support bracket 445, and the connector 605 can be easily attached.

[0494] The work machine 1 also includes a plurality of coolers (radiator R1, condenser G3) arranged in series in the horizontal direction, and a frame member (connecting frame 459) that supports one cooler so that the other cooler can move closer to or away from the other cooler. One end side of the frame member in the horizontal direction is supported so as to be rotatable about a vertical axis (rotation axis X2). The work machine 1 also includes a cooling system device (receiver G2) that is attached to one end side of the frame member and connected to the other cooler via a connection hose. The other cooler has a first connection joint 475 to which a first refrigerant hose 474 is connected in a position adjacent to the vertical axis (rotation axis X2), and the cooling system device has a second connection joint 478 to which a second refrigerant hose 478 different from the first refrigerant hose is connected in a position adjacent to the vertical axis (rotation axis X2).

[0495] According to this configuration, one cooler opens sideways relative to the other cooler, so that removed foreign objects such as dust can be easily dropped down, and cleaning of the coolers can be easily performed because the cleaning work is performed from the side. In addition, when the frame member is rotated, the expansion of the first refrigerant hose 474 and the second refrigerant hose 477 can be suppressed, and interference with surrounding members can be prevented. Furthermore, kinking of the first refrigerant hose 474 and the second refrigerant hose 477 can be prevented.

[0496] Further, the first connection joint 475 and the second connection joint 478 are arranged in an oblique direction that becomes more downward as it goes away from the vertical axis (rotation axis X2).

[0497] According to this configuration, expansion of the first refrigerant hose 474 and the second refrigerant hose 477 when the frame member is rotated can be suppressed, and kinking of the first refrigerant hose 474 and the second refrigerant hose 477 can be effectively prevented.

[0498] Further, the second connection joint 478 is provided with a gas check member 479 for checking the amount of refrigerant in the second connection joint 478, and the gas check member 479 is arranged so that the normal direction of the viewing surface faces diagonally upward.

[0499] This configuration makes it easy to check the refrigerant.

[0500] In addition, the engine may further include a third cooler (oil cooler O1) arranged in parallel with one of the coolers in the horizontal direction.

[0501] It also includes a support bracket 445 for supporting the first cooler and the third cooler, and a fitting bracket 453 that is removably fitted to the upper part of the first cooler and the third cooler, and the frame member connects the support bracket 445 and the fitting bracket 453.

[0502] According to this configuration, the first and second coolers and the third cooler can be attached and detached in a state where they are assembled to the support bracket 445, the fitting bracket 453 and the frame member, thereby improving ease of assembly and maintenance.

[0503] In addition, the fitting bracket 453 has a first regulating part (regulating pin 481) that regulates the opening angle when the frame member rotates in a direction away from one of the coolers, a second regulating part (regulating piece 482) that regulates the rotation of the frame member in a direction approaching one of the coolers in the open state in which the opening angle is regulated, and a support piece 483 that supports the second regulating part so that it can swing up and down, and the second regulating part is placed on the frame member when the frame member is closed, and swings downward to engage with the frame member when the frame member is positioned in the open state.

[0504] According to this configuration, when the frame members are opened, the frame members are automatically restricted to the open state, so that it is possible to prevent the frame members from interfering with surrounding areas and to improve the efficiency of cleaning work.

[0505] The frame member also has an upper frame material 459A located above the other cooler, a lower frame material 459B located below, a one-end side frame material (front frame material 459C) located on one end side, and an other-end side frame material (rear frame material 459D) located on the other end side opposite the one-end side frame material, and the vertical axis (rotation axis X2) is located closer to the other-end side frame material than the one-end side frame material.

[0506] With this configuration, when the frame members are opened, the rear side of the one end frame member can be cleaned.

[0507] In addition, the lower part of the other end side frame material is formed shorter than the lower part of the one end side frame material, and the lower frame material 459B has a first portion 467a extending from the lower end of the other end side frame material toward the one end side, a second portion 467b extending downward from one end side of the first portion 467a, and a third portion 467c extending from the lower end of the second portion 467b toward the one end side and connected to the lower end side of the one end side frame material.

[0508] With this configuration, the first part 467a and the second part 467b form an upwardly recessed recess in the lower part of the frame member, which prevents the lower part of the frame member from interfering with surrounding parts when the frame member is opened.

[0509] It also has a cooling fan F1 that generates cooling air, one of the coolers is a radiator R1 that cools the cooling water of the prime mover E1, the other cooler is a condenser G3 that cools the refrigerant of the air conditioner, and the third cooler is an oil cooler O1 that cools the hydraulic oil of the hydraulic equipment, and the condenser G3 and the cooling fan F1 are positioned closer to the radiator R1 than the boundary between the radiator R1 and the oil cooler O1.

[0510] According to this configuration, in a structure in which the radiator R1 and the oil cooler O1 are arranged in parallel with each other in the width direction K2 of the aircraft body, the prime mover E1 can be cooled efficiently.

[0511] The work machine 1 also has a swivel base 42 that can rotate around a vertical axis (swivel axis X1) and a cooler (radiator R1) mounted on the swivel base 42, and the swivel base 42 has a discharge hole 486 that is formed through the swivel base 42 near the cooler and can discharge foreign matter on the swivel base 42, and a cover plate 487 that covers the discharge hole 486 and can be attached and detached from above.

[0512] According to this configuration, when cleaning the cooler, dust that falls onto the swivel base plate 42 can be discharged from the discharge hole 486, facilitating the work of cleaning up the dust. In addition, since the discharge hole 486 can be blocked with the cover plate 487, it is possible to prevent mud and the like from entering from below the swivel base plate 42, and since the cover plate 487 can be attached and detached from above the swivel base plate 42, the work of attaching and detaching the cover plate can be easily performed.

[0513] Also, a guide member 488 that guides the wiring members (return pipes 393B, 393D) that are wired above the swivel base plate 42 is provided, and the guide member 488 is fixed to a cover plate 487.

[0514] According to this configuration, the guide member 488 can be used as a gripping member when attaching and detaching the cover plate 487.

[0515] In addition, there is another cooler (condenser G3) that is arranged in series with the cooler in the width direction K2 of the body and has one end side in the horizontal direction pivoted around a vertical axis (rotation axis X2) so as to be rotatable in a direction away from the cooler, and the discharge hole 486 is provided on the other end side opposite to the one end side of the other cooler.

[0516] According to this configuration, foreign matter such as dust that falls from the cooler can be efficiently removed when the cooler is cleaned.

[0517] In addition, a regulating member (regulating piece 482) is provided which regulates the movement of the other cooler in the separating direction when the other cooler is rotated in the separating direction, and the discharge hole 486 is formed at a position which overlaps with the other cooler in a planar view when in an open state in which the movement of the other cooler is regulated by the regulating member.

[0518] With this configuration, foreign matter such as dust can be efficiently removed when cleaning the cooler.

[0519] Also, a frame member (connecting frame 459) is provided which supports the other coolers and is rotatable about a vertical axis (rotation axis X2). The frame member has an upper frame member 459A located above the other coolers, a lower frame member 459B located below, a one end frame member (front frame member 459C) located on one end side, and an other end frame member (rear frame member 459D) located on the other end side, and the lower part of the other end frame member is formed shorter than the lower part of the one end frame member. The lower frame material 459B has a first portion 467a extending from the lower end of the other end side frame material toward one end, a second portion 467b extending downward from one end side of the first portion 467a, and a third portion 467c extending from the lower end of the second portion 467b toward one end side and connected to the lower end side of the one end side frame material, and the discharge hole 486 is formed in a position which overlaps with the lower frame material 459B in a planar view when the other cooler is in an open state.

[0520] According to this configuration, foreign matter such as dust can be easily discharged even when the frame member is rotated.

[0521] The work machine 1 also includes a prime mover E1, a cooler disposed on the side of the prime mover E1, a shroud 425 provided between the cooler and the prime mover E1, and a partition structure 458 above the shroud 425, which separates a prime mover chamber E2 that houses the prime mover E1 from the arrangement side of the cooler. The partition structure 458 is a partition structure through which wiring members (harnesses 507A, 507B) that are arranged between the prime mover chamber E2 and the arrangement side of the cooler pass. The connector has a main plate 496 having a first cutout portion 500, and a first sub-plate 497 that holds grommets 506A, 506B that cover the periphery of the wiring member in the first cutout portion 500, the first cutout portion 500 having a first opening 515a that opens downward and allows the wiring member to pass through, and the first sub-plate 497 can be attached to the main plate 496 with the wiring member inserted into the first cutout portion 500.

[0522] According to this configuration, when replacing the wiring member, the wiring member can be removed simply by removing the first sub-plate 497, improving ease of assembly and maintenance.

[0523] In addition, by lowering the main plate 496 from above onto the wiring members arranged between the engine chamber E2 and the cooler arrangement side, the wiring members can be inserted into the first cutout portion 500 through the first opening 515a, and then the first sub-plate 497 is attached to the main plate 496 to hold the grommets 506A, 506B that cover the periphery of the wiring members, so that the partition structure 458 can be assembled with the wiring members pre-assembled.

[0524] It also has a first hose (reservoir hose 510) that connects a tank (reservoir tank 517) arranged in the prime mover chamber E2 and the cooler through the first cutout portion 500, and the first sub-plate 497 is attached to the main plate 496 with the first hose inserted into the first cutout portion 500, and has a cover portion (fourth portion 497d) that covers the first cutout portion 500 around the first hose.

[0525] According to this configuration, it is possible to assemble the partition structure 458 in a state in which the first hose is preassembled. Furthermore, when replacing the first hose, it is only necessary to remove the first sub-plate 497, which improves maintainability.

[0526] Also, a second hose (upper hose 514) is provided which passes through the first cutout portion 500 and connects the prime mover E1 to the cooler, and the cover portion covers the first cutout portion 500 around the second hose.

[0527] According to this configuration, it is possible to assemble the partition structure 458 in a state in which the second hose is pre-assembled. Furthermore, when replacing the second hose, it is only necessary to remove the first sub-plate 497, which improves maintainability.

[0528] It also includes a bonnet 22 that forms the prime mover compartment E2, a support frame 11 that supports the bonnet 22, an air cleaner 519 provided on the side where the cooler is arranged, and an intake duct 520 that connects the air cleaner 519 and the prime mover E1, and the main plate 496 has a second cutout portion 501 through which the intake duct 520 passes, and the second cutout portion 501 has a second opening 515c that opens upward so that the intake duct 520 can be inserted into the second cutout portion 501 while the intake duct 520 is supported on the support frame 11.

[0529] According to this configuration, the partition structure 458 can be assembled with the air cleaner 519 and the intake duct 520 preassembled.

[0530] It also has a duct seal 518 that covers the periphery of the intake duct 520 in the second cutout portion 501, and the duct seal 518 has a first seal member 518A that is held at the edge of the second cutout portion 501 and a second seal member 518B that sandwiches the intake duct 520 between the first seal member 518A, and the partition structure 458 has a second sub-plate 498 that is attached to the main plate 496 and holds the second seal member 518B.

[0531] According to this configuration, the periphery of intake duct 520 can be partitioned off in a state in which intake duct 520 is pre-assembled. Furthermore, when replacing intake duct 520, it is only necessary to remove second sub-plate 498, improving maintainability.

[0532] The partition structure 458 also comprises a bonnet 22 which forms a motor chamber E2, a support frame 11 which supports the bonnet 22, and a piping member 524 arranged in the motor chamber E2, and has a piping bracket 499 which is attached to the support frame 11 and which supports the piping member 524, and the main plate 496 has a third notch portion 502 which opens upward and fits into the piping bracket 499 from below.

[0533] According to this configuration, the partition structure 458 can be assembled with the piping member 524 pre-assembled.

[0534] The work machine 1 also includes a body 2, a prime mover E1 mounted on the body 2, a bonnet 22 forming a prime mover compartment E2 that houses the prime mover E1, a support frame 11 erected on the body 2 and supporting the bonnet 22, and side members (shroud 425 and partition structure 458) arranged on the side of the prime mover E1, and the support frame 11 has an abutment wall 491d that abuts against a sealing material (trim seal 545) provided on the side member.

[0535] According to this configuration, by abutting a seal material (trim seal 545) provided on a side member disposed on the side of the motor E1 against a contact wall 491d provided on the support frame 11, the partitioning property of the motor chamber E2 can be improved.

[0536] Further, the support frame 11 has a partition cover 491 disposed on the side member side and partitioning the motor chamber E2, and the partition cover 491 has an abutment wall 491d.

[0537] According to this configuration, the partitioning effect of the motor chamber E2 can be further improved.

[0538] The support frame 11 also has a partition member 22A that separates the front of the engine compartment E2, and has two front legs 57L, 57R arranged at a distance in the aircraft width direction K2, and at least one rear leg 58L, 58R arranged rearward of the front legs 57L, 57R, the partition member 22A being provided between the two front legs 57L, 57R, and the partition cover 491 being fixed to the side opposite the partition member 22A of the front leg 57R closer to the side member.

[0539] According to this configuration, the partitioning effect between the support frame 11 and the side members can be further improved.

[0540] The partition cover 491 also has a side wall portion 491a fixed to one of the front legs, an upper wall portion 491b extending laterally from the upper end of the side wall portion 491a and covering the upper part between the prime mover E1 and the side member, and a front wall portion 491c extending downward from the front end of the upper wall portion 491b and connected to the side wall portion 491a, covering the front part between the prime mover E1 and the side member.

[0541] According to this configuration, the partitioning effect between the prime mover E1 and the side member can be further improved.

[0542] The contact wall 491d extends forward from the end of the front wall portion 491c on the side member side.

[0543] According to this configuration, the sealing performance between the side member and the partition cover 491 can be improved.

[0544] The cooling fan F1 is driven by the power of the prime mover E1, and a shroud 425 covers the cooling fan F1. The side members have the shroud 425, and the seal material (trim seal 545) is provided on the shroud 425.

[0545] According to this configuration, the sealing performance between the shroud 425 and the partition cover 491 can be improved.

[0546] The shroud 425 also has a first cooler (radiator R1) and a second cooler (oil cooler O1) arranged on the side opposite the prime mover E1, and the first cooler and the second cooler are arranged in parallel and lined up front and back in the aircraft width direction K2, the width of the shroud 425 in the front-to-back direction K1 is formed to a front-to-back width W8 corresponding to the first cooler and the second cooler, and the front end side of the partition cover 491 is provided at a position corresponding to the front end side of the shroud 425.

[0547] According to this configuration, in a structure in which the first cooler and the second cooler are arranged in parallel in a front-rear direction on the side of the motor E1, it is possible to improve the partitioning properties of the motor chamber E2.

[0548] The front-rear width W8 of the main body (shroud main body 541) of the shroud 425 is greater in width W10 from the rotation axis X3 of the cooling fan F1 than in width W9 from the rotation axis X3 to the rear.

[0549] According to this configuration, the partitioning effect of the motor chamber E2 can be improved.

[0550] The work machine 1 also includes a body 2, a prime mover E1 mounted on the rear of the body 2, a cooling fan F1 driven by the power of the prime mover E1, a shroud 425 covering the cooling fan F1, a bonnet 22 forming a prime mover chamber E2 that houses the prime mover E1, a support frame 11 erected on the body 2 and supporting the bonnet 22, a weight 46 covering the lower rear of the prime mover E1, a first partition structure that divides the prime mover chamber E2 below the shroud 425, a second partition structure that divides the prime mover chamber above the shroud 425, a first seal material (trim seal 545) provided at the front of the shroud 425 and abutting against an abutment wall 491d provided on the support frame 11 side, and a second seal material (seal material 550) provided at the rear of the shroud 425 and abutting against the weight 46.

[0551] According to this configuration, the sealing performance around the shroud 425 can be improved.

[0552] Further, a partition cover 491 is provided between the shroud 425 and the support frame 11 to partition the motor chamber E2, and the partition cover 491 has an abutment wall 491d.

[0553] According to this configuration, the sealing performance of the motor chamber E2 can be improved.

[0554] It also includes a tank stand 424 arranged in front of the shroud 425 and fixed to the aircraft body 2, a tank (hydraulic oil tank T2) attached to the tank stand 424, and a seal structure 602 provided below the lower part of the shroud 425 and below the first sealing material, and abutting the tank and the tank stand 424.

[0555] According to this configuration, the sealing performance at the front portion of the shroud 425 can be improved.

[0556] The bonnet 22 also has a seal mounting wall 553a provided at a position corresponding to the upper rear portion of the shroud 425, and a third seal material (seal material 554) attached to the seal mounting wall 553a, and the third seal material abuts against the rear portion of the shroud 425 above the second seal material.

[0557] According to this configuration, the sealing performance at the rear portion of the shroud 425 can be improved.

[0558] The first partition structure also includes a passage member 434 having an opening through which the hydraulic pipeline 427 passes, a holding member 429 arranged in the vicinity of the passage member 434 and covering the hydraulic pipeline 427 to hold the hydraulic pipeline 427, and a sealing member 437 that seals between the passage member 434 and the holding member 429.

[0559] According to this configuration, the sealing performance around the hydraulic line 427 routed through the passage member 434 can be improved.

[0560] The main plate 496 also has a first cutout 500 through which the wiring members (harnesses 507A, 507B) routed inside and outside the motor compartment E2 pass, and a first sub-plate 497 which holds grommets 506A, 506B which cover the surrounding area of ​​the wiring members in the first cutout 500, the first cutout 500 having a first opening 515a which opens downward and through which the wiring members can pass, and the first sub-plate 497 can be attached to the main plate 496 with the wiring members inserted into the first cutout 500.

[0561] According to this configuration, when replacing the wiring member, the wiring member can be removed simply by removing the first sub-plate 497, improving ease of assembly and maintenance.

[0562] The work machine 1 also comprises a body 2, a prime mover E1 mounted on the rear of the body 2, a bonnet 22 covering the prime mover E1, a support frame 11 erected on the body 2 and supporting the bonnet 22, and a frame member 206 supporting members arranged on the side of the body 2, the rear of the frame member 206 being connected to the support frame 11 and extending from the support frame 11 to the front of the body 2, with the front part erected on the front of the body.

[0563] According to this configuration, the frame member 206 is connected to the support frame 11 and the fuselage 2, thereby improving the support strength.

[0564] Also, a cover body (side cover 21) is provided to cover the devices arranged on the side of the body 2, and the frame member 206 is housed inside the cover body and supports the cover body.

[0565] According to this configuration, the cover body can be firmly supported.

[0566] The frame member 206 also has a first frame component member 208 that is fixed to the support frame 11 and protrudes forward from the support frame 11, and a second frame component member 207 that extends forward from the first frame component member 208, has a front portion bent downward, and is fixed to the front portion of the aircraft.

[0567] According to this configuration, the weight of the frame member 206 can be reduced.

[0568] It also includes a cover body (side cover 21) that covers the equipment arranged on the side of the body 2 and houses a frame member 206 inside, and the cover body has a first cover member 26 that is supported on the first frame component member 208 so as to be able to be opened and closed.

[0569] According to this configuration, the first cover member 26 can be firmly supported.

[0570] The cover body has a second cover member 27 which covers the frame member and houses the devices supported by the second frame component member 207, and the second cover member 27 is detachably attached to the frame member.

[0571] According to this configuration, it is possible to inspect the devices supported by the second frame component member by removing the second cover member 27. By attaching the first cover member 26 and the second cover member 27 to the frame member 206, it is possible to minimize misalignment between these cover members 26, 27.

[0572] The aircraft also includes a cabin 5 mounted on the aircraft body, and the second cover member 27 is provided between the cabin 5 and the first cover member 26 and is removably attached to the frame member 206 from inside the second cover member 27.

[0573] According to this configuration, the gap between the cabin 5 and the first cover member 26 can be narrowed.

[0574] The battery stand 566 also has a mounting wall 571a on which a first battery BT1a and a second battery BT1b having different mounting formats can be selectively mounted, and a regulating member (regulating plate 572) provided on the mounting wall 571a to regulate the movement of the first battery BT1a and the second battery BT1b toward the front side, and the regulating member has a regulating portion (first regulating portion 579) that engages with a first engagement protrusion 569g provided on the lower front side of the second battery BT1b to regulate the upward movement of the second battery BT1b.

[0575] This configuration allows batteries of different mounting styles to be attached.

[0576] In addition, the regulating member (regulating plate 572) has a main plate portion 576 that corresponds to the front surface of the first battery BT1a and the front surface of the second battery BT1b, and the regulating portion is provided between one end portion and the other end portion of the main plate portion 576 and is formed by cutting out a portion of the main plate portion 576.

[0577] According to this configuration, the structure of the regulating member (regulating plate 572) can be simplified.

[0578] In addition, the regulating member (regulating plate 572) has a first side plate portion 577 extending from one end portion of the main plate portion 576 and a second side plate portion 578 extending from the other end portion, and the first side plate portion 577 abuts against one side surface of the first battery BT1a and the second battery BT1b to regulate the movement of the first battery and the second battery toward the one side surface, and the second side plate portion 578 abuts against the other side surface of the first battery BT1a and the second battery BT1b to regulate the movement of the first battery and the second battery toward the other side surface.

[0579] According to this configuration, the first side plate portion 577 and the second side plate portion 578 provided on the regulating member (regulating plate 572) can regulate the movement of the first battery BT1a and the second battery BT1b toward the side, thereby simplifying the structure.

[0580] The mounting wall 571a has a fastener insertion hole 583b and a fastener attachment portion 584. The fastener insertion hole 583b can receive a part of a first fastener 587 that presses and fixes the first battery BT1a from above against the mounting wall 571a. The fastener attachment portion 584 can receive a second fastener 591 that engages with a second engagement protrusion 569k provided on the back surface of the second battery BT1b to restrict movement of the second battery BT1b toward the back surface and upward movement. According to this configuration, a first fastener 587 for fastening the first battery BT1a and a second fastener 591 for fastening the second battery BT1b can be attached.

[0581] Furthermore, the work machine 1 may include the machine body 2 and the battery stand 566 described above.

[0582] In this work machine 1, the battery stand 566 has a vertical support wall extending downward from the other end of the mounting wall, and the body 2 may be provided with a mounting wall mounting portion 573 on which one end side of the mounting wall 571a is placed and attached, and a vertical support wall mounting portion 42a on which the lower end portion of the vertical support wall 571a is placed and attached.

[0583] According to this configuration, the structure of the battery stand 566 can be simplified.

[0584] The work machine 1 also comprises a body 2, a tank stand 424 fixed to the body 2, and a tank (hydraulic oil tank T2) attached to the tank stand 424, and the tank stand 424 has a support plate 424B erected on the body 2, and a tank mounting plate 424A whose plate surface is arranged along the horizontal direction and to which the tank is bolted, and the tank mounting plate 424A has a joint surface 424a formed in the longitudinal direction of an upper end surface 424b of the support plate 424B at one end in the direction along the plate surface, and the joint surface 424a is located midway in the plate thickness direction of the upper end surface 424b of the support plate 424B and is joined to the upper end surface 424b by welding.

[0585] According to this configuration, welding distortion of the tank mounting plate 424A can be reduced, and a decrease in the strength of the tank can be prevented. Also, welding can be performed from above, which improves production efficiency.

[0586] The tank mounting plate 424A also has a mounting piece 424c that protrudes from the joint surface 424a and to which the tank is fixed with a bolt.

[0587] This configuration can prevent a downward stress from acting on the mounting piece 424c.

[0588] The body 2 also has a swivel base 42 supported on the running gear 3 so as to be rotatable around a vertical axis (swivel axis X1), and a reinforcing rib (second rib 43R) arranged and fixed on the swivel base 42 from the front to the rear, and the reinforcing rib has a reinforcing portion 233a fixed in face contact with the plate surface of the support plate 424B.

[0589] This configuration can improve the strength of the support plate 424B.

[0590] The support plate 424B is formed in the vicinity of the reinforcing portion 233a and has a through hole 601 through which the wiring member 600 passes.

[0591] According to this configuration, it is possible to prevent a decrease in strength of support plate 424B caused by forming through-hole 601.

[0592] The reinforcing rib includes a sheet metal rib 232R made of sheet metal and a cast steel rib 233R made of cast steel, and the reinforcing portion 233a is provided in the cast steel rib 233R.

[0593] According to this configuration, the support plate 424B can be easily reinforced.

[0594] Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0595] 2. Aircraft 425 Shroud 445 Support bracket 453 Mating bracket 459 Frame members 459a Mounting part 459b Mounting part 459c Mounting part 459d Mounting part 460A Lifting equipment 460B Lifting equipment 472 Mounting Frame 544 Ventilation opening 605 Concatenation 606 1st connection piece 607 Second connection piece 608 First Groove 609 Second Groove 612 Vertical members 613 1st contact part 614 Second contact part 615 First Fastener 616 Second Fastener 619 First piece 620 Second protrusion 623 First bolt member 624 First nut member 626 Second bolt member 627 Second nut member E1 Prime Mover F1 Cooling Fan J1 First mounting member (first elastic member) J2 First mounting member (second elastic member) J3 First mounting member (third elastic member) J4 1st mounting member (4th elastic member) J5 Second mounting member (fifth elastic member) J6 Second mounting member (sixth elastic member) J7 Second mounting member (seventh elastic member) J8 Second mounting member (eighth elastic member) K2 Machine width direction N1 4th cooler (fuel cooler) O1 Second cooler (oil cooler) R1 First cooler (radiator) G3 3rd Cooler (Condenser) b1 First lower protrusion (first plug pin) b2 First lower protrusion (second plug pin) b3 Second lower protrusion (third plug pin) b4 2nd lower protrusion (4th insertion pin) b5 First upper protrusion (fifth plug pin) b6 First upper protrusion (sixth plug pin) b7 Second upper protrusion (7th plug pin) b8 Second upper protrusion (8th plug pin)

Claims

1. A support bracket extending in a first direction; a first cooler and a second cooler arranged in parallel along the first direction on the support bracket; a fitting bracket provided across an upper portion of the first cooler and an upper portion of the second cooler and removably fitted to the upper portions of the first cooler and the second cooler; a frame member connecting a middle portion of the support bracket in the first direction and a middle portion of the fitting bracket in the first direction; Equipped with the support bracket, the first cooler, the second cooler, the fitting bracket, and the frame member can be suspended integrally in a state in which the first cooler and the second cooler are sandwiched between the fitting bracket and the support bracket and the midway portion of the fitting bracket and the midway portion of the support bracket are connected by the frame member, The first cooler and the second cooler are each independently supported by the support bracket and the fitting bracket, and are individually removable by removing the fitting bracket.

2. The cooling equipment unit according to claim 1 , further comprising a hanger fixed to the mating bracket for suspending the cooling equipment unit as a whole.

3. The cooling equipment unit according to claim 1 , wherein the frame member connects the fitting bracket and the support bracket at a position offset in a direction perpendicular to the first direction with respect to the first cooler and the second cooler.

4. The cooling equipment unit according to claim 3 , wherein the frame member has a mounting portion for mounting a third cooler, the third cooler being disposed at a position offset in a direction perpendicular to the first direction with respect to the first cooler and the second cooler.

5. The cooling equipment unit according to claim 4 , wherein the frame member has a mounting frame for mounting a fourth cooler disposed at a position offset in a direction perpendicular to the first direction with respect to the first cooler and the second cooler.

6. The frame member includes a front frame member and a rear frame member arranged at an interval in the first direction, an upper frame member connecting upper portions of the front frame member and the rear frame member, and a lower frame member connecting lower portions of the front frame member and the rear frame member, The upper frame member is supported by the fitting bracket near one end in the first direction so as to be rotatable about a vertical axis, The lower frame member is supported by the support bracket near one end in the first direction so as to be rotatable around the vertical axis, The vicinity of the other end of the upper frame member in the first direction is removably fixed to the fitting bracket by a bolt, The cooling equipment unit according to claim 4 or 5, wherein the vicinity of the other end of the lower frame member in the first direction is removably fixed to the support bracket by a bolt.

7. A work machine comprising the cooling equipment unit according to claim 1.

Images