Working machine

Abstract

To provide a working machine capable of suppressing thermal influence of a prime mover during driving on an electronic control unit for controlling the prime mover even if the electronic control unit is arranged near the prime mover.SOLUTION: The present invention includes a machine body including a frame, an operator's seat supported by the frame, a prime mover room arranged in a first direction with respect to the operator's seat and accommodating a prime mover supported by the frame, a unit room arranged in a second direction intersecting the first direction with respect to the prime mover room and accommodating an electronic control unit for controlling the prime mover, a first partition wall partitioning a space on the frame into the prime mover room and a space on an operator's seat side of the prime mover room in the first direction, and a second partition wall having an end edge portion in close contact with the first partition wall and partitioning the prime mover room and the unit room.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a work machine equipped with a driving motor. [Background technology]

[0002] Conventionally, a work machine such as a backhoe includes a driver's seat, a driving motor (for example, an internal combustion engine or an electric motor), an electronic control unit that controls the motor, a partition wall disposed between the driver's seat and the motor, and a bonnet that covers the motor. In this type of work machine, the partition wall and the bonnet form a machinery room that houses the motor, and the partition wall separates the driver's cab including the driver's seat from the machinery room. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-175890 Summary of the Invention [Problem to be solved by the invention]

[0004] The electronic control unit is connected to the engine via wiring such as a harness to control the engine, and is therefore preferably located near the engine to improve the ease of wiring and prevent disconnection.

[0005] However, if the electronic control unit is located near the prime mover, it may be affected by the heat generated by the prime mover and its associated devices during operation, which may result in damage or malfunction. Therefore, currently, electronic control units are located in locations that are less susceptible to the heat of the prime mover, etc., i.e., away from the machine room, in order to prevent damage or malfunction.

[0006] Therefore, the present invention provides a work machine that can suppress the thermal effect of the driving prime mover on the electronic control unit that controls the prime mover, even if the electronic control unit is disposed near the prime mover. [Means for solving the problem]

[0007] The present invention comprises an aircraft body including a frame, a driver's seat supported by the frame, a prime mover compartment aligned in a first direction relative to the driver's seat and accommodating a prime mover supported by the frame, a unit compartment aligned in a second direction intersecting the first direction relative to the prime mover compartment and accommodating an electronic control unit that controls the prime mover, a first partition wall that separates the prime mover compartment from the space on the driver's seat side of the prime mover compartment in the first direction on the frame, and a second partition wall that has an edge portion that is in close contact with the first partition and separates the prime mover compartment from the unit compartment. [Effects of the Invention]

[0008] The present invention can suppress the thermal effect of the driving prime mover on the electronic control unit that controls the prime mover, even if the electronic control unit is disposed near the prime mover. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an overall perspective view of a work machine according to an embodiment of the present invention, as viewed obliquely from the front. [Figure 2] FIG. 2 is an overall perspective view of the work machine according to the embodiment, as seen obliquely from behind. [Figure 3] FIG. 3 is an overall perspective view of the working machine according to the embodiment, in a partially disassembled state, as viewed obliquely from the front. [Figure 4] FIG. 4 is a cross-sectional view of the first partition wall of the work machine according to the embodiment, including the arrangement of the driver's seat and the prime mover. [Figure 5] FIG. 5 is a partially enlarged cross-sectional view of a machine room (first machine room) of the work machine according to the embodiment. [Figure 6]FIG. 6 is a perspective view of the working machine according to the embodiment, in a state where the first partition wall and the second partition wall are assembled to the support frame. [Figure 7] FIG. 7 is a side view of the working machine according to the embodiment, showing a state in which the first partition wall and the second partition wall are assembled to the support frame. [Figure 8] FIG. 8 is an exploded perspective view of the working machine according to the embodiment, with the first partition wall and the second partition wall disassembled. [Figure 9] FIG. 9 is a plan view of a swivel base which is a frame of the work machine according to the embodiment. [Figure 10] FIG. 10 is an enlarged view of the X portion of FIG. [Figure 11] FIG. 11 is a schematic perspective view of a support frame of the work machine according to the embodiment. [Figure 12] FIG. 12 is an exploded perspective view of a main part including a partition member (second partition) of the work machine according to the embodiment. [Figure 13] FIG. 13 is a schematic partial cross-sectional view showing how wires are inserted into the wiring hole of the first partition wall (wall main body) of the work machine according to the embodiment. [Figure 14] FIG. 14 is an enlarged perspective view of a main part of the working machine according to the embodiment with the first exterior part removed. DETAILED DESCRIPTION OF THE INVENTION

[0010] A work machine according to one embodiment of the present invention will be described below with reference to the drawings. Since the work machine of this embodiment is capable of traveling, as will be described in detail later, in the following description, the direction in which the work implement moves straight (forward and backward directions) is referred to as the front-to-rear direction, and the direction perpendicular to the front-to-rear direction is referred to as the lateral direction. The front-to-rear direction may also be referred to as the first direction, and the lateral direction as the second direction. Furthermore, the standard position of the work machine is when the work implement, described later, is positioned forward in the forward direction, and the following description will be based on the standard position.

[0011] As shown in FIGS. 1 to 3, the work machine 1 includes a body 2 including a frame 21. The work machine 1 also includes a traveling device 3 that supports the body 2 so that it can travel. The work machine 1 includes a work device 4 for performing a predetermined task, the work device 4 being supported by the body 2. The work machine 1 of this embodiment is a ride-on vehicle and includes a driver's seat 10 supported by the frame 21. The work machine 1 also includes a prime mover 5 that directly or indirectly drives the traveling device 3, the prime mover 5 being aligned in the fore-and-aft direction (first direction) with respect to the driver's seat 10 and supported by the frame 21. Accordingly, the work machine 1 also includes an electronic control unit 6 that controls the prime mover 5, and wiring PL that connects the prime mover 5 and the electronic control unit 6. The work machine 1 also includes an exterior body 7 that covers the prime mover 5 and other devices 50, 51, 52, 53, 54, and T mounted on the frame 21.

[0012] As shown in FIG. 4, the work machine 1 is provided with a first partition wall 8 arranged between the driver's seat 10 and the prime mover 5. The first partition wall 8 divides the frame 21 in a first direction into a driver's cab DR (a space on the driver's seat 10 side) including the driver's seat 10 and a machine room MR (a space on the side of a prime mover room MR1a described below, opposite the driver's seat 10) including the prime mover 5. In this embodiment, as shown in FIG. 5, the work machine 1 is provided with a second partition wall 90 having an edge portion in close contact with the first partition wall 8, which divides the machine room MR in a second direction perpendicular to the first direction into a prime mover room MR1a including the prime mover 5 and a unit room MR1b including the electronic control unit 6. Accordingly, the work machine 1 is provided with a support frame 22 that supports the first partition wall 8 and the second partition wall 90, as shown in FIGS. 6 to 8. The edge of the second partition wall 90 may be welded to the first partition wall 8 to make the gap between the first partition wall 8 and the second partition wall 90 airtight. Alternatively, a sealant (not shown) may be provided between the edge of the second partition wall 90 and the first partition wall 8. The gap between the first partition wall 8 and the second partition wall 90 may be made airtight by interposing a gap (omitted).

[0013] Prior to describing the machine body 2, the traveling devices 3, working devices 4, and motor 5 will be described. As shown in Figures 1 to 3, the working machine 1 of this embodiment is equipped with a pair of traveling devices 3. The pair of traveling devices 3, 3 are disposed on both lateral sides of the machine body 2.

[0014] In this embodiment, a crawler-type traveling device is employed for each of the pair of traveling devices 3, 3, but the traveling device 3 may also be a tire-type traveling device. The traveling device 3 is equipped with a traveling motor as a drive source. In this embodiment, the traveling motor is a hydraulic motor that receives a supply of hydraulic oil from a hydraulic system that includes a hydraulic pump P that is driven by a prime mover 5.

[0015] The work machine 1 according to this embodiment is a backhoe, and is equipped with a shovel unit 4a (excavation unit) and a dozer unit 4b as work implements 4. The work implements 4 (shovel unit 4a, dozer unit 4b) are equipped with hydraulic actuators, and the hydraulic actuators are connected to a hydraulic system including a hydraulic pump P, similar to the travel motor.

[0016] In this embodiment, the prime mover 5 is a diesel engine. Although a diesel engine is used as the prime mover 5 in this embodiment, the present invention is not limited to this and other internal combustion engines, such as a gasoline engine, an LPG engine, or a hydrogen engine, may also be used. Furthermore, the prime mover 5 is not limited to an internal combustion engine and may also be an electric motor. The electronic control unit 6 is generally called an ECU (Electronic Control Unit).

[0017] In this embodiment, the work machine 1 is equipped with, as equipment associated with the prime mover 5, a DPF 50 (Diesel Particulate Filter) that captures PM (Particulate Matter) contained in the exhaust gas and automatically burns the PM (DPF regeneration), a radiator 51 that cools the diesel engine, a fuel tank 54, etc. (see FIG. 2).

[0018] The machine body 2 comprises a running base 20 to which the running device 3 is connected, a swivel base 21 which is a frame 21 arranged above the running base 20, an annular swivel bearing B (see Figure 9) interposed between the running base 20 and the swivel base 21, and a driver's seat protection device 23 arranged on the swivel base 21 and defining a driver's cab DR (riding space).

[0019] The traveling device 3 is connected to each of both lateral ends of the traveling base 20, and the dozer device 4b of the working device 4 is connected to the front end of the traveling base 20 in the front-rear direction.

[0020] As shown in FIG. 9, the swivel base 21 includes a base plate 210 and an apparatus support 211 that supports the working apparatus 4 and is attached to the base plate 210.

[0021] The base plate 210 supports at least the driver's seat 10 and the engine 5. The base plate 210 is a metal plate that extends in the front-rear and lateral directions. The base plate 210 has a support surface on its underside that is placed on the slewing bearing B. In the base plate 210 of this embodiment, both lateral edge edges (side ends) extend linearly in the front-rear direction, the front edge (front end) in the front-rear direction extends linearly in the lateral direction generally, and the rear edge (rear end) in the front-rear direction extends linearly in the lateral direction generally.

[0022] Of the entire region A (the entire upper surface region A as viewed from above) of the base plate 210 according to this embodiment, the region on the front side in the front-rear direction and the other (left) side in the lateral direction is the driver's seat 10 and the driver's seat 11. The first area A1 is set as the area where the protective device 23 is placed, the area rearward in the fore-and-aft direction from the first area A1 is set as the second area A2 where the prime mover 5 is placed, and the area on one side (right side) of the first area A1 and the second area A2 in the lateral direction is set as the third area A3 where a fuel tank 54 for storing fuel for the prime mover 5 (internal combustion engine) 4, a hydraulic oil tank T for storing hydraulic oil for the hydraulic system, etc. are placed.

[0023] Specifically, the first region A1 is set to a rectangular region in a plan view. That is, the first region A1 is set to extend from a front edge (front end) of the base plate 210 in the front-rear direction to a position a predetermined distance rearward in the front-rear direction (in this embodiment, a position beyond the center line extending in the lateral direction of the base plate 210 rearward in the front-rear direction), and a first boundary line L1, which is a boundary between the first region A1 and the second region A2, extends linearly in the lateral direction at this position. Furthermore, the first region A1 is set to extend from a front edge on the other (left) side of the base plate 210 in the lateral direction to a position a predetermined distance to one (right) side in the lateral direction (in this embodiment, a position beyond the center line extending in the front-rear direction of the base plate 210 to one (right) side in the lateral direction), and a second boundary line L2, which is a boundary between the first region A1, the second region A2, and the third region A3, extends linearly in the front-rear direction at this position.

[0024] The size of the second area A2 in the front-rear direction (the distance from the rear end of the base plate 210 in the front-rear direction to the first boundary line L1) is set to a size in which the devices 5, 50, 51, 52, and 53 to be placed can be arranged, and the size of the third area A3 in the lateral direction (the distance from one edge of the base plate 210 in the lateral direction to the second boundary line L2) is set to a size in which the devices to be placed can be arranged. In other words, the first area A1 is set so as to leave spaces (the second area A2 and the third area A3) in which the devices 5, 50, 51, 52, and 53 to be placed on the base plate 210 can be placed.

[0025] The second region A2 of the base plate 210 is provided with an opening 210a penetrating vertically. In this embodiment, a perforated metal 212 having a plurality of holes (slots) 212a aligned in the front-rear and lateral directions is disposed in the opening 210a of the second region A2. The opening 210a of the second region A2 (the plurality of holes (slots) 212a of the perforated metal 212 in this embodiment) constitutes an exhaust hole that discharges (exhausts) heat generated from the devices 5, 50, 51, and 52, such as the prime mover 5, disposed in the second region A2. That is, the base plate 210 is provided with the exhaust hole 210a (212a) that discharges air from the prime mover chamber MR1a to the outside.

[0026] The swivel base 21 has a partition wall 213 erected on the first boundary line L1 of the base plate 210. That is, the partition wall 213 divides the swivel base 21 into a first area A1 and a second area A2 in the front-to-rear direction. The swivel base 21 also has frame receiving portions 214, 215 that receive a support frame 22 that assembles (supports) the first partition wall 8 and the second partition wall 90. In this embodiment, the frame receiving portions 214, 215 are disposed at two locations on the first boundary line L1 and at two locations on the rear edge (rear end) of the base plate 210 in the front-to-rear direction.

[0027] The two frame receiving portions 214, 214 on the front side (front side) in the front-to-rear direction (hereinafter referred to as front frame receiving portions) are arranged with a gap between them in the horizontal direction, and the two frame receiving portions 215, 215 on the rear side (rear side) in the front-to-rear direction (hereinafter referred to as rear frame receiving portions) are arranged with a gap between them in the horizontal direction. The two front frame receiving portions 214, 214 on the first boundary line L1 are attached to the upper end of the partition wall 213 and are arranged at a predetermined distance above the top surface of the base plate 210 in the vertical direction. The two rear frame receiving portions 215, 215 on the rear end of the base plate 210 are attached to the upper ends of support members 216 that are erected on the base plate 210. In this embodiment, the vertical distance from the upper surface of the base plate 210 to the upper surfaces (receiving surfaces) of the front frame receiving portions 214, 214 and the vertical distance from the upper surface of the base plate 210 to the upper surfaces (receiving surfaces) of the rear frame receiving portions 215, 215 are set to be the same or approximately the same. In other words, the vertical height of the support member 216 corresponds to the vertical height of the partition wall 213.

[0028] In addition, a step 24 constituting the floor (floor plate) of the driver's cab DR defined by the driver's seat protection device 23 is disposed in the first area A1 (see FIG. 3). The step 24 is disposed at an upper position a predetermined distance above the upper surface of the base plate 210. In this embodiment, the rear end of the step 24 in the front-rear direction is supported by front frame receiving portions 214, 214. That is, the front frame receiving portions 214, 214 support the step 24 in addition to the support frame 22. Accordingly, a step support member 217 is attached to the front end of the base plate 210 in the front-rear direction, supporting the front end of the step 24 in the front-rear direction at a height position that is the same as or approximately the same as the rear end side.

[0029] The device support body 211 has a device coupling part 211a to which the working device 4 is coupled. The device support body 211 is coupled to the front end part (front end part) of the base plate 210 in the front-to-rear direction, and the device coupling part 211a is positioned forward of the front end of the base plate 210. In this embodiment, a shovel device 4a of the working device 4 is coupled to the device coupling part 211a. In the standard posture, the shovel device 4a extends further forward than the dozer device 4b (see FIG. 1, etc.).

[0030] 3, the driver's seat 10 (seat for sitting), operating devices, etc. are arranged on the step 24 (first region A1 of the base plate 210), and the driver's seat protection device 23 covers the periphery of the driver's seat 10, etc. In other words, the driver's seat protection device 23, together with the step 24, defines the driver's cab DR inside which the driver's seat 10, etc. are arranged.

[0031] The driver's seat 10 is disposed forward of the engine 5 and fixed to the step 24. As shown in FIG. 9, the driver's seat 10 is disposed on the first area A1 (step 24). In this embodiment, the driver's seat 10 is disposed in a manner that it protrudes into the second area A2 when viewed from above (in a plan view), on the premise that it is disposed forward of the engine 5. In other words, the driver's seat 10 is disposed across the first area A1 and the second area A2.

[0032] The prime mover 5 and devices associated with the prime mover 5 (such as the DPF 50 and the radiator 51) are disposed in the second area A2 of the base plate 210 (the prime mover room MR1a of the machine room MR (first machine room MR1)). Specifically, in the second area A2 of the base plate 210, the prime mover 5 is disposed above the exhaust port 212a of the base plate 210, and the DPF 50 is disposed above the prime mover 5. In this embodiment, the radiator 51 receives air blown by a fan 53 driven by the prime mover 5 and forcibly cools the coolant. Accordingly, the radiator 51 is disposed on one side (right) of the prime mover 5 in the lateral direction. An oil cooler 52 that cools the hydraulic oil flowing through the hydraulic system is also disposed next to the radiator 51 in the lateral direction. A hydraulic pump P driven by the prime mover 5 is disposed on the other side (left) of the prime mover 5 in the lateral direction. That is, in the second area A2, the oil cooler 52, the radiator 51, the fan 53, the motor 5, and the hydraulic pump P are arranged in this order from one side to the other in the lateral direction. In this embodiment, the fan 53 is configured to draw in outside air from one side (right side) in the lateral direction and send it out to the other side (left side) (motor chamber MR1a) and downward.

[0033] In contrast, the fuel tank 54 and the hydraulic oil tank T are arranged in an area of ​​the third area A3 that is less susceptible to the heat of the prime mover 5 and the like (in this embodiment, the area on the front side in the front-rear direction).

[0034] 1 to 3, the driver's seat protection device 23 may be a canopy including a roof arranged above the driver's seat 10 and pillars (frames) supporting the roof, but the driver's seat protection device 23 according to this embodiment is a so-called cabin, and has a roof 230 that forms the upper part of the driver's cab DR, and wall portions 231, 232, 233, and 234 that cover the front, rear, left, and right sides of the driver's seat 10. That is, the driver's seat protection device 23 has wall portions 231, 232, 233, and 234 that separate the inside and outside of the driver's cab DR.

[0035] The driver's seat protection device 23 (cabin) of this embodiment has, as walls, a front wall portion 231 arranged on the front side in the longitudinal direction and including a front window 231a, a rear wall portion 232 arranged on the rear side in the longitudinal direction and including a rear window 232a, a right wall portion 233 arranged on one (right) side in the lateral direction and including a side window 233a and a side wall 233b (see Figure 2), and a left wall portion 234 arranged on the other (left) side in the lateral direction and including a side window 234a and an entry / exit door 234b (see Figures 1 and 3).

[0036] In this embodiment, as shown in Fig. 9, the driver's seat 10 is disposed across the first area A1 and the second area A2 in a plan view (viewed from above), and therefore the rear wall portion 232 of the driver's seat protection device 23 is disposed so as to protrude into the second area A2 when viewed in the up-down direction. In the driver's seat protection device 23 of this embodiment, as shown in Fig. 3, the lower end portion of the rear wall portion 232 is supported by the support frame 22 that supports the first partition wall 8 and the second partition wall 90 via the vibration isolation mechanism 225.

[0037] 1 to 3, the exterior body 7 covers the entire machine room MR. The exterior body 7 includes multiple exterior members 700, 701, 702, 710, 711, and 712, and by combining these multiple exterior members 700, 701, 702, 710, 711, and 712, the devices 5, 50, 51, 52, 53, 54, and T on the base plate 210 (second area A2 and third area A3) are covered and protected from above and sides.

[0038] The exterior body 7 covers the equipment 5, 50, 51, 52, 53, 54, and T on the swivel base 21 (base plate 210) which is the frame 21 from above in the vertical direction and from the sides perpendicular to the vertical direction, and defines a machine room MR that houses the equipment 5, 50, 51, 52, 53, 54, and T.

[0039] More specifically, in the work machine 1 of this embodiment, the machine room MR includes a first machine room MR1 located rearward of the driver's seat protection device 23 (driver's cab DR) in the front-to-rear direction, and a second machine room MR2 located on one side (right) in the lateral direction of the driver's seat protection device 23 (driver's cab DR). That is, the machine room MR includes the first machine room MR1 corresponding to the second area A2 of the base plate 210, and the second machine room MR2 corresponding to the third area A3 of the base plate 210.

[0040] 5, the first machine chamber MR1 includes a motor chamber MR1a in which the motor 5 is disposed, and a unit chamber MR1b in which the electronic control unit 6 is disposed. That is, the first machine chamber MR1 is partitioned in the lateral direction (second direction) by the second partition wall 90 into the motor chamber MR1a and the unit chamber MR1b.

[0041] 1 to 3, the exterior body 7 of this embodiment includes a first exterior portion 70 that defines the first machine room MR1 and a second exterior portion 71 that defines the second machine room MR2. That is, the exterior body 7 includes the first exterior portion 70 that covers the devices 5, 6, 50, 51, 52, and 53 that are arranged in the second area A2 of the base plate 210, and the second exterior portion 71 that covers the devices 54 and T that are arranged in the third area A3 of the base plate 210.

[0042] Both the first exterior portion 70 and the second exterior portion 71 are made of a plurality of exterior members 700, 701, 70 2, 710, 711, 712, and a machine room MR (first machine room MR1, second machine room MR2) is defined by a combination of the multiple exterior members 700, 701, 702, 710, 711, 712. In this embodiment, the first exterior part 70 and the second exterior part 71 each include an exterior cover 701, 710, 711 that is rotatably provided around an axis extending in a predetermined direction and that can be opened and closed.

[0043] 1 and 3, the first exterior part 70 (exterior body 7) includes a first exterior cover 700 that can open and close the unit chamber MR1b among a plurality of exterior members 700, 701. Also, the first exterior part 70 includes a first bonnet 701 that is rotatable about an axis extending in the horizontal direction and that can be opened and closed among a plurality of exterior members 700, 701, 702, as shown in FIG.

[0044] More specifically, the first exterior section 70 includes, as multiple exterior members 700, 701, 702, a first exterior cover 700 (see FIGS. 1 and 3) that can open and close the unit compartment MR1b, an exterior member (hereinafter referred to as a rear exterior member) 702 that is arranged along the rear wall portion 232 of the driver's seat protection device 23, and a hood (hereinafter referred to as a first hood) 701 that is an exterior cover connected to the rear exterior member 702 so as to be able to open and close around a horizontal axis that extends laterally relative to the rear exterior member 702. In the work machine 1 of this embodiment, a balance weight 73 is attached along the rear end of the base plate 210 of the swivel base 21. As a result, the balance weight 73 is located below the first hood 701 in the closed state.

[0045] The first exterior cover 700 faces the second partition wall 90 at a distance on the other side (left: unit chamber MR1b) in the lateral direction (second direction) and covers the electronic control unit 6 in the unit chamber MR1b from the other side in the second direction. The first exterior cover 700 is configured to be able to come into close contact with a second portion 705 (see FIG. 10) of the rear exterior member 702, which is located on at least one side in the lateral direction (second direction), via a seal member, as described below.

[0046] The first bonnet 701 is disposed in the horizontal direction between the first exterior cover 700 and a second exterior cover 710 (described later). In this embodiment, the first bonnet 701 is disposed between the second portion 705 of the rear exterior member 702 and the second exterior cover 710, and in the closed state, closes the gap between the second portion 705 of the rear exterior member 702 and the second exterior cover 710.

[0047] First bonnet 701 is the rearmost exterior cover and has an upper end and a lower end in the up-down direction. In this embodiment, first bonnet 701 includes a top portion 701a extending in the front-to-rear direction, having a front end on the front side and another end on the rear side, and a rear hanging wall portion 701b extending downward from the rear end of top portion 701a. In this embodiment, the other end of rear hanging wall portion 701b in the lateral direction is curved forward. Accordingly, the front end of top portion 701a is the upper end of first bonnet 701, and the lower end of rear hanging wall portion 701b is the lower end of first bonnet 701.

[0048] Accordingly, the front end of a top portion 701a, which is the upper end of the first bonnet 701, is connected to a first portion 704 (described later) of the rear exterior member 702 via a hinge having a horizontal axis extending laterally. The position of the upper end of the balance weight 73 is set corresponding to the height of the lower end of the first bonnet 701 in the closed state. The lower end of the first bonnet 701 in the closed state is set to match the position of the upper end of the balance weight 73. In other words, the lower end of the first bonnet 701 in the closed state overlaps with the upper end of the balance weight 73 from the rear side in the front-to-rear direction.

[0049] As shown in FIG. 10, the rear exterior member 702 extends laterally and is positioned behind the driver's seat protection device 23. It includes a first portion 704 disposed along the outer surface of the wall portion 232 and a second portion 705 extending downward from the other lateral end of the first portion 704.

[0050] In the rear exterior member 702, the first portion 704 closes the gap between the driver's seat protection device 23 and the first hood 701 disposed behind the driver's seat protection device 23. The first portion 704 is disposed at a position higher than the highest position (highest position) of the devices 5, 50, 51, 52, 53, and P disposed in the second area A2 of the base plate 210, based on the upper surface of the base plate 210. In this embodiment, the first portion 704 is formed in a curved shape that is convex upward so that its apex is located in the center in the lateral direction.

[0051] The second portion 705 includes a band-shaped hanging wall portion 705a that hangs down from the other lateral end (edge) of the first portion 704. The hanging wall portion 705a has a longitudinal direction in the hanging direction and an outer surface facing the other lateral side. The second portion 705 also includes a partition wall portion 705b that is connected to the entire front-to-rear edge of the hanging wall portion 705a and has a surface facing forward in the front-to-rear direction. The front-facing surface of the partition wall portion 705b extends in the vertical and horizontal directions. Specifically, the partition wall portion 705b is formed in a band-shaped shape, has a longitudinal direction in the vertical direction, and a short side (width) in the horizontal direction. The short side (width direction) of the partition wall portion 705b coincides or approximately coincides with the width direction of the bottom wall 91 of the partition member 9. The front-facing surface of the partition wall portion 705b or one lateral edge of the partition wall portion 705b is in close contact with a rising end E4 (described later) of the second partition wall 90 (wall main body 90a). That is, the space between the front-facing surface of the partition wall portion 705b and the second partition wall 90 (wall main body 90a) is airtight. In this embodiment, a sealant 83 (not shown) is interposed between the partition wall portion 705b and the rising end E4 of the second partition wall 90 to enhance airtightness. Note that the partition wall portion 705b and the rising end E4 of the second partition wall 90 may be welded together to achieve airtightness. Furthermore, in this embodiment, the partition wall portion 705b is included as part (second portion 705) of the rear exterior member 702 that constitutes the exterior body 7, but the partition wall portion 705b may be a member independent of the exterior body 7 (rear exterior member 702) as long as it has a configuration in which it is in close contact with the edge portion of the second partition 90 that is in close contact with the first partition 8 and an edge portion other than the lower end of the second partition 90, and extends in the same direction as the bottom wall 91.

[0052] As shown in FIG. 2, the second exterior part 71, like the first exterior part 70, includes multiple exterior members 710, 711, 712, and 713. The second exterior part 71 (exterior body 7) includes, among the multiple exterior members 710, 711, 712, and 713, a second exterior cover 710 that can be opened and closed around a first axis extending in the up-down direction. The second exterior part 71 also includes, among the multiple exterior members 710, 711, 712, and 713, a hood (hereinafter referred to as the second hood) 711 that is an exterior cover that can be opened and closed around a second axis extending in the front-rear direction and perpendicular to the first axis. The second exterior cover 710 and the second hood 711 are adjacent to each other in the up-down direction. The second hood 711 is disposed above the second exterior cover 710 and is adjacent to the second exterior cover 710 in the up-down direction.

[0053] In this embodiment, the second exterior part 71 includes, among the multiple exterior members 710, 711, 712, and 713, a second bonnet 711 and an exterior fixed cover 712 that is adjacent to the second exterior cover 710 and the second bonnet 711 and cannot be opened or closed, as exterior members adjacent to the second exterior cover 710. The second exterior part 71 also includes, among the multiple exterior members 710, 711, 712, and 713, a side exterior member 713 that is adjacent to the second bonnet 711. That is, the second exterior part 71 of this embodiment includes, as the multiple exterior members, the second exterior cover 710, the second bonnet 711, the exterior fixed cover 712, and the side exterior member 713.

[0054] The second exterior cover 710 covers the devices arranged in the third area A3 of the base plate 210 from the side (one (right) side in the lateral direction). In this embodiment, the second exterior cover 710 has an intake hole 710 for taking in outside air into the machine room MR (the motor room MR1a of the first machine room MR1). A mesh (netting material) is arranged in intake hole 710a to prevent foreign matter from entering.

[0055] In this embodiment, the second exterior cover 710 covers the devices in the third area A3 from the sides, but the outside air taken in through the intake holes 710a flows into the motor chamber MR1a of the first machine chamber MR1 through the third area A3 (second machine chamber MR2). The second hood 711 is adjacent to the second exterior cover 710 in the vertical direction, and covers the devices (fuel tank 54, hydraulic oil tank T, etc.) arranged in the third area A3 of the base plate 210 from above.

[0056] In this embodiment, the second exterior cover 710 and the exterior fixed cover 712 are disposed adjacent to each other in the front-rear direction. Accordingly, the second bonnet 711 is formed so as to straddle both the second exterior cover 710 and the exterior fixed cover 712. Note that in this embodiment, the exterior fixed cover 712 faces the fuel tank 54 and the hydraulic oil tank T from the side (one (right) side in the lateral direction), but other devices are also disposed in the third area A3.

[0057] For this reason, in this embodiment, the second exterior cover 710 covers the devices on the third area A3 from the lateral direction, and also indirectly covers the radiator 51 and the oil cooler 52 on the second area A2 from one lateral side. Accordingly, in this embodiment, the second exterior cover 710 and the exterior fixing cover 712 cover the devices arranged in the second area A2 and the third area A3 of the base plate 210 from the lateral direction, and the second bonnet 711 covers the devices arranged in the third area A3 of the base plate 210 from above.

[0058] In this embodiment, the exterior fixed cover 712 is disposed on the front side in the front-to-rear direction relative to the second exterior cover 710. The second exterior cover 710 is disposed on the rear side of the exterior fixed cover 712. In this embodiment, the second exterior cover 710 and the exterior fixed cover 712 are disposed along a portion of one lateral side of the front edge (front end) of the base plate 210 in the front-to-rear direction, an edge (side edge) on one lateral side of the base plate 210, and a portion of one side of the rear edge (rear end) of the base plate 210 in the front-to-rear direction (the edge on one lateral side that defines the third area A3). In this embodiment, the balance weight 73 is provided across the entire width of the base plate 210 in the lateral direction, and therefore a lower portion of the rear end side of the second exterior cover 710 is cut out so as to avoid the balance weight 73.

[0059] The exterior fixed cover 712 is supported (fixed) at a fixed position by a support frame (not shown) fixed to the base plate 210. In contrast, the second exterior cover 710 is supported so as to be rotatable about a first axis. In this embodiment, the front end portion in the front-rear direction of the second exterior cover 710 is connected to a support (not shown) that supports the rear end portion in the front-rear direction of the exterior fixed cover 712 via a hinge including a first axis extending in the up-down direction (a predetermined direction). As a result, the second exterior cover 710 opens and closes with the front end side in the front-rear direction set as the rotation center. In other words, the second exterior cover 710 is a side-opening cover.

[0060] In the closed state, the second exterior cover 710 closes the gap between the exterior fixed cover 712 and the rear hanging wall portion 701b of the first bonnet 701 of the first exterior part 70 in the closed state. The second exterior cover 710 and the exterior fixed cover 712 form an exterior surface that is continuous in the front-to-rear direction. In this embodiment, the second exterior cover 710 and the exterior fixed cover 712 are formed in a curved shape that bulges (protrudes) on one side in the lateral direction, and these outer surfaces continuously form the side surfaces of the second exterior part 71.

[0061] The second hood 711 is curved in the longitudinal and lateral directions and has a peak (top) at the center in each of the longitudinal and lateral directions. The second hood 711 is provided so as to be openable and closable about a second axis that extends in a direction (longitudinal direction) perpendicular to the first axis that serves as the rotation center of the second exterior cover 710. In this embodiment, the second axis extends in the longitudinal direction. In this embodiment, the second hood 711 closes the area surrounded by the right wall portion 233 of the driver's seat protection device 23, the second exterior cover 710, and the exterior fixed cover 712. In this embodiment, since the second exterior portion 71 includes a side exterior member 713, the second hood 711 closes the area (opening 210a) surrounded by the side exterior member 713, the second exterior cover 710, and the exterior fixed cover 712. Although not mentioned in the above explanation, in the exterior body 7 of this embodiment, sealing members are arranged between the multiple exterior members 700, 701, 702, 710, 711, 712, and 713, keeping the machine room MR airtight and liquid-tight and preventing hot air from leaking from the machine room MR and rainwater from entering the machine room MR.

[0062] The first partition wall 8 and the second partition wall 90 are integrally assembled to the support frame 22. Prior to describing the first partition wall 8 and the second partition wall 90, the support frame 22 will be described.

[0063] As shown in FIG. 11, the support frame 22 includes a pair of support legs 220, 220 spaced apart in the horizontal direction, and a leg connecting portion 221 connecting the pair of support legs 220, 220.

[0064] Each of the pair of support legs 220, 220 includes a front leg portion 222 arranged on the front side, a rear leg portion 223 arranged on the rear side of the front leg portion 222, and a beam portion 224 extending in the front-to-rear direction and connecting the front leg portion 222 and the rear leg portion 223.

[0065] The lower ends of the front leg portions 222 of the pair of support legs 220 are connected to and supported by two front frame receiving portions 214 that support the left and right rear corners of the step 24. The front leg portion 222 has a lower end connected to the front frame receiving portions 214 on the base plate 210 and includes a first inclined portion 222a that is slightly inclined rearward as it extends upward, and a second inclined portion 222b that is connected to the upper end of the first inclined portion 222a and is inclined rearward as it extends upward at a larger inclination angle than the first inclined portion 222a.

[0066] The rear legs 223 extend in the vertical direction (substantially perpendicular to the swivel base 21 (base plate 210)). The lower ends of the rear legs 223 of the pair of support legs 220 are connected to and supported by rear frame receiving portions 215 on a support member 216 erected at the rear end of the base plate 210.

[0067] The front end of the beam portion 224 is connected to the upper end of the second inclined portion 222b, extends rearward in a substantially horizontal direction, and has its rear end connected to the upper end of the rear leg portion 223. The vertical heights of the pair of support legs 220, 220 are set so that the heights of the beam portions 224 are substantially the same.

[0068] The leg connecting portion 221 extends horizontally (laterally), and one end of the leg connecting portion 221 is connected to the beam portion 224 of one of the support legs 220, and the other end of the leg connecting portion 221 is connected to the beam portion 224 of the other support leg 220. The lower end of the rear wall portion 232 of the driver's seat protection device 23 is connected to the leg connecting portion 221 of the support frame 22 via a vibration-isolating mechanism 225 (see FIG. 3).

[0069] The first partition wall 8 is a sound-absorbing wall (soundproof wall) for suppressing propagation of sound (such as driving sound of the prime mover 5) from inside the motor compartment MR1a into the driver's cab DR. As shown in FIG. 4, the first partition wall 8 separates the driver's cab DR from the machinery compartment MR. In this embodiment, the first partition wall 8 is continuous with a partition wall 213 on a base plate 210 in the vertical direction. As a result, the partition wall 213 separates the machinery compartment MR from the lower area of ​​the driver's cab DR. In this embodiment, the first partition wall 8 is attached to a pair of support legs 220 (front legs 222) of the support frame 22 (see FIG. 8). The first partition wall 8 is a double wall in which a pair of metal plates 80, 81 face each other at an interval in a direction perpendicular to the lateral direction (from the motor compartment MR1a side toward the driver's cab DR side).

[0070] Specifically, the first partition 8 includes a first wall 80 arranged on the driver's cab DR side, a second wall 81 arranged on the motor compartment MR1a side, and a sound-absorbing material 82 arranged between the first wall 80 and the second wall 81. In the present embodiment, the first partition 8 includes an elastic sealing material 83 that is sandwiched between the first wall 80 and the second wall 81 (a second main wall 81a described later) and surrounds the periphery of the sound-absorbing material 82 arranged between the first wall 80 and the second wall 81 (the second main wall 81a described later).

[0071] The first wall 80 is made up of one metal plate, whereas the second wall 81 is made up of two metal plates arranged side by side in the horizontal direction.

[0072] 6, the first wall 80 (a single metal plate) is disposed across the front leg portions 222 of the pair of support legs 220, 220. In this embodiment, the width of the first wall 80 in the lateral direction is set wider than the distance between the pair of support legs 220, 220, and one of the lateral ends of the first wall 80 is positioned laterally outward of the front leg portions 222 of the support legs 220, 220. Specifically, the first wall 80 straddles the pair of support legs 220, 220 with the edge on one lateral side (right side) abutting against the surface of the support leg 220 on one lateral side (right side) that faces the other lateral side, and protrudes from the other support leg 220 on the other lateral side (left side).

[0073] That is, the distance between the front leg portions 222 of the pair of support legs 220, 220 is set narrower than the range to be blocked by the first partition wall 8, and the first wall 80 arranged within the range to be blocked protrudes laterally outward from the front leg portion 222 of the other support leg 220 on the other (left) side in the lateral direction in relation to the pair of support legs 220, 220. Note that in the first wall 80, the portion corresponding to the space between the front leg portions 222 of the pair of support legs 220, 220 is referred to as a first main wall region 80a, and the portion protruding outward from the front leg portion 222 is referred to as a first sub-wall region 80b.

[0074] In contrast, as shown in Figure 8, the second wall 81 includes a second main wall 81a arranged between the front leg portions 222, 222 of the pair of support legs 220, 220, the second main wall 81a facing the first main wall region 80a with a gap therebetween, and a second sub-wall 81b aligned laterally with the second main wall 81a across the front leg portion 222 of the other support leg 220, the second sub-wall 81b facing the first sub-wall region 80b with a gap therebetween.

[0075] The first wall 80 is made of a single metal plate, and in the second wall 81, the second main wall 81a and the second sub-wall 81b are each made of a single metal plate.

[0076] Returning to Figure 4, in this embodiment, the first partition 8 has a first inclined partition portion 8a that is inclined along the first inclined portion 222a of the support legs 220, 220, a second inclined partition portion 8b that is inclined along the second inclined portion 222b of the support legs 220, 220, and a ceiling partition portion 8c that extends horizontally along the beam portion 224 of the support legs 220, 220.

[0077] 6, the ceiling partition portion 8c is disposed in the area forward of the leg connecting portion 221. The second inclined partition portion 8b of the first partition 8 includes an inspection hatch 800 that allows access to the engine 5 side from the driver's seat 10 side, and a blocking body 84 that can block the inspection hatch 800.

[0078] In this embodiment, the first wall 80, the second main wall 81a, and the second sub-wall 81b are each made of a single metal plate, and therefore, as shown in Figure 8, the metal plates constituting the first wall 80, the second main wall 81a, and the second sub-wall 81b are bent according to the shape (inclination) of the first inclined partition wall portion 8a, the second inclined partition wall portion 8b, and the ceiling partition wall portion 8c.

[0079] In this embodiment, the second sub-wall 81b of the second wall 81 is a partition wall including the second partition wall 90, which will be described later. The second sub-wall 81b is incorporated into the wall member 9. That is, the second sub-wall 81b is integrated with the second partition wall 90.

[0080] The first wall 80 and the second wall 81 are attached to the support frame 22 (support legs 220, 220) by welding or screw fastening. The first wall 80 and the second wall 81 may be integrated by welding or bolting, or may be fixed to the support frame 22 separately.

[0081] The sound absorbing material 82 is a foamed resin (urethane foam). In this embodiment, the sound absorbing material 82 is in close contact with either the first wall 80 or the second wall 81 (second main wall 81a). In this embodiment, the sound absorbing material 82 is in close contact with the first wall 80. Note that the material of the sound absorbing material 82 is not limited to this, and it may be another foamed resin, or a material other than foamed resin that has sound absorbing or sound insulating properties. Furthermore, it is preferable that the sound absorbing material 82 has heat insulating properties that reduce the transmission of heat from the engine compartment MR1a to the driver's cab DR.

[0082] Inspection hatch 800 has a first opening 800a formed in first wall 80 on the driver's seat 10 side, and a second opening 800b formed in second wall 81 (second main wall 81a) on the motor 5 side at a position corresponding to first opening 800a. In this embodiment, the opening area of ​​second opening 800b is formed slightly smaller than that of first opening 800a.

[0083] The blocking body 84 includes a first metal blocking plate 84a that blocks the inspection hatch 800 while overlapping the surface of the periphery of the first opening 800a in the first wall 80 on the driver's seat 10 side, and a second metal blocking plate 84b that blocks the inspection hatch 800 while overlapping the surface of the periphery of the second opening 800b in the second wall 81 (second main wall 81a) on the driver's seat 10 side. The blocking body 84 includes a sound-absorbing material 85 interposed between the first blocking plate 84a and the second blocking plate 84b, and in this embodiment, the sound-absorbing material 85 is in close contact with the first blocking plate 84a.

[0084] A grippable handle 840 is attached to the first closing plate 84a. The first closing plate 84a is screwed to the first wall 80 via a male screw member. The second closing plate 84b is screwed to the second wall 81 (second main wall 81a) via a male screw member.

[0085] In this embodiment, a sealing member 87 that fills the gap is interposed between the opposing portion of the first closing plate 84a and the first wall 80. The sealing member 87 may be made of, for example, foamed resin or rubber. Note that a sealing member 87 may also be interposed between the opposing portion of the second closing plate 84b and the second wall 81 (second main wall 81a).

[0086] The sound-absorbing material 85 of the blocking body 84 can be fitted into the second wall 81 (second main wall 81a) side from the first opening 800a. The sound-absorbing material 82 of the first partition wall 8 (the sound-absorbing material 82 between the first wall 80 (first main wall region 80a) and the second wall 81 (second main wall 81a)) has an opening having a shape corresponding to the sound-absorbing material 85 of the blocking body 84, and the sound-absorbing material 85 of the blocking body 84 fits into this opening, thereby disposing the sound-absorbing materials 82, 85 over substantially the entire surface of the partition wall.

[0087] The second main wall 81a of the second wall 81 may be formed in the same shape and size as the first main wall region 80a of the first wall 80, but in this embodiment, it has a different shape. Specifically, a notch cut out on one side in the horizontal direction is formed at the other end of the second wall 81 (second main wall 81a) 91 in the horizontal direction. Therefore, the first main wall region 80a of the first wall 80 and the second main wall 81a of the second wall 81 do not entirely face each other, and the first main wall region 80a of the first wall 80 includes a non-facing region that does not face the second main wall 81a of the second wall 81. In other words, the outline of the first main wall region 80a and the outer contour (outer periphery) of the second main wall 81a of the second wall 81 are aligned in the direction in which they are arranged. From the perspective, it is inconsistent.

[0088] As shown in FIG. 4, the second wall 81 (second main wall 81a and second sub-wall 81b) is a metal plate thinner than the first wall 80. That is, the plate thickness of the first wall 80 is thicker than the plate thickness of the second wall 81 (second main wall 81a). Specifically, the plate thickness of the first wall 80 is set to be 1.5 times or more that of the second wall 81 (second main wall 81a). In this embodiment, the plate thickness of the first wall 80 is 3.2 mm, and the plate thickness of the second wall 81 (second main wall 81a) is 2 mm. Therefore, the plate thickness of the first wall 80 is set to be 1.6 times that of the second wall 81 (second main wall 81a).

[0089] The sound absorbing materials 82, 85 are disposed between the first wall 80 and the second wall 81 (second main wall 81a), and face the first wall 80 and the second wall 81 (second main wall 81a) with a gap formed between them and at least one of the first wall 80 and the second wall 81 (second main wall 81a). The sound absorbing material 82 is in close contact with the first wall 80 and is spaced apart from the second wall 81 (second main wall 81a) to form a gap G between it and the second wall 81 (second main wall 81a).

[0090] More specifically, the sound-absorbing materials 82, 85 are foamed resin (urethane foam) and formed in a plate shape. The thickness of the sound-absorbing material 82 is set to be thinner than the distance between the first wall 80 and the second wall 81 (the distance between the pair of metal plates 80, 81). In other words, the sound-absorbing material 82 has a thickness necessary for sound absorption, and is set to a thickness that allows a gap G to be formed between the first wall 80 and the second main wall 81a of the second wall 81 when the sound-absorbing material 82 is placed between the first wall 80 and the second main wall 81a of the second wall 81.

[0091] As described above, the partition wall of this embodiment includes a plurality of regions (first inclined partition wall portion 8a, second inclined partition wall portion 8b, and ceiling partition wall portion 8c), and therefore, sound-absorbing material 82 is divided into a plurality of parts and arranged in the corresponding regions. That is, first partition wall 8 includes, as sound-absorbing material 82, a plurality of divided sound-absorbing materials 82a, 82b, and 82c according to the regions in which they are arranged.

[0092] 8, the sound-absorbing material 82 includes a plurality of divided sound-absorbing materials 82a, 82b, and 82c, namely, a first sound-absorbing material 82a for the first inclined partition wall portion 8a, a second sound-absorbing material 82b for the second inclined partition wall portion 8b, and a third sound-absorbing material 82c for the ceiling partition wall portion 8c. Furthermore, because the first partition wall 8 has an inspection hatch 800 and a blocking body 84 that closes the inspection hatch 800, the sound-absorbing material 82 further includes a fourth sound-absorbing material 85 for the blocking body 84.

[0093] Each of the first sound-absorbing material 82a, the second sound-absorbing material 82b, the third sound-absorbing material 82c, and the fourth sound-absorbing material 85 is formed in a plate shape and has a thickness necessary for absorbing sound. Furthermore, each of the first sound-absorbing material 82a, the second sound-absorbing material 82b, the third sound-absorbing material 82c, and the fourth sound-absorbing material 85 is set to a thickness that allows a gap G to be formed between the opposing first wall 80 and the second main wall 81a of the second wall 81 when they are arranged between the first wall 80 and the second main wall 81a of the second wall 81.

[0094] The first sound-absorbing material 82a and the third sound-absorbing material 82c are formed in a generally rectangular shape in a plan view. That is, the first sound-absorbing material 82a is formed in a rectangular shape in a plan view that is slightly smaller than the size of the first inclined partition wall portion 8a, and the second sound-absorbing material 82b is formed in a rectangular shape in a plan view that is slightly smaller than the ceiling partition wall portion 8c. That is, the first sound-absorbing material 82a is set to a size that allows it to be placed within the first inclined partition wall portion 8a while ensuring sufficient space for the sealing material 83, and the third sound-absorbing material 82c is set to a size that allows it to be placed within the ceiling partition wall portion 8c while ensuring sufficient space for the sealing material 83.

[0095] In this embodiment, the inspection hatch 800 and the blocking body 84 are provided in the second inclined partition wall portion 8b, so the second sound absorbing material 82b is positioned to bypass the inspection hatch 800, and the fourth sound absorbing material 85 is formed according to the size and shape of the opening 210a of the inspection hatch 800. In this embodiment, the second sound absorbing material 82b is positioned on the other lateral side of the inspection hatch 800. Therefore, the second sound absorbing material 82b is set to a shape that avoids the notch portion of the second wall 81 (second main wall 81a).

[0096] In this embodiment, the first sound-absorbing material 82a is adhered to the first wall 80 of the first inclined partition portion 8a, the second sound-absorbing material 82b is adhered to the first wall 80 of the second inclined partition portion 8b, and the third sound-absorbing material 82c is adhered to the first wall 80 of the ceiling partition portion 8c. In addition, the fourth sound-absorbing material 85 is adhered to a first closing plate 84a that constitutes the closing body 84. That is, in the partition of this embodiment, the sound-absorbing materials 82 (the first sound-absorbing material 82a, the second sound-absorbing material 82b, the third sound-absorbing material 82c, and the fourth sound-absorbing material 85) are attached to a metal plate on the driver's cab DR side.

[0097] The sealing material 83 is an elongated body made of urethane rubber. The sealing material 83 can be bent in a direction perpendicular to or intersecting with the long (lengthwise) direction. In this embodiment, the sealing material 83 is formed with a rectangular cross section. The outer dimension of the sealing material 83 in a direction perpendicular to the long (lengthwise) direction is set to be larger than the distance between the first wall 80 and the second main wall 81a of the second wall 81. In other words, the sealing material 83 is set to a size such that it is sandwiched and compressed between the first wall 80 and the second main wall 81a of the second wall 81 when disposed between the first wall 80 and the second main wall 81a of the second wall 81.

[0098] In this embodiment, the cross-sectional shape of the sealing material 83 as viewed in the longitudinal (longitudinal) direction is a rectangle whose outer contour (outer shape) includes four sides. Accordingly, of the four sides constituting the outer contour of the sealing material 83, the lengths of at least two sides extending in the same direction are set to be longer than the distance between the first wall 80 and the second main wall 81a of the second wall 81. In this embodiment, the cross-sectional shape of the sealing material 83 is a square, and the lengths of all four sides are set to be longer than the distance between the first wall 80 and the second main wall 81a of the second wall 81.

[0099] The sealing material 83 surrounds the sound-absorbing material 82. In the present embodiment, the partition wall includes a plurality of divided sound-absorbing materials 82a, 82b, and 82c (first sound-absorbing material 82a, second sound-absorbing material 82b, third sound-absorbing material 82c, and fourth sound-absorbing material 85) as the sound-absorbing material 82, and therefore the sealing material 83 collectively surrounds all of the plurality of divided sound-absorbing materials 82a, 82b, and 82c (first sound-absorbing material 82a, second sound-absorbing material 82b, third sound-absorbing material 82c, and fourth sound-absorbing material 85) between the first wall 80 and the second main wall 81a of the second wall 81. That is, the sealing material 83 is arranged across multiple areas of the partition wall, thereby surrounding multiple divided sound-absorbing materials 82a, 82b, 82c (first sound-absorbing material 82a, second sound-absorbing material 82b, third sound-absorbing material 82c, and fourth sound-absorbing material 85).

[0100] The sealing material 83 is disposed along the outer peripheral edge of the first wall 80 or the second wall 81. In the present embodiment, as described above, the outer contours (outer peripheries) of the first wall 80 and the second wall 81 do not match, and the planar area of ​​the second wall 81 (second main wall 81a) is smaller than the planar area of ​​the first wall 80. That is, the second wall 81 (second main wall 81a) is entirely opposed to the first wall 80 (first main wall region 80a), whereas the first wall 80 has a portion that protrudes from the second wall 81 (second main wall 81a).

[0101] Accordingly, in the partition wall of this embodiment, the sealing material 83 is arranged along the outer peripheral edge of the second wall 81 (second main wall 81a) and is sandwiched between the first wall 80 and the second main wall 81a of the second wall 81 and is in close contact with the first wall 80. As a result, the sealing material 83 is arranged in an annular shape. In other words, the sealing material 83 is arranged in an annular shape between the first wall 80 and the second main wall 81a of the second wall 81, and the sound-absorbing material 82 (more specifically, a plurality of divided sound-absorbing materials 82a, 82b, 82c) is arranged within the area surrounded by this sealing material 83.

[0102] 5, the second partition wall 90 divides the machine room MR (in this embodiment, the first machine room MR1) into two areas in the second direction. That is, the second partition wall 90 divides the machine room MR (in this embodiment, the first machine room MR1) into a prime mover room MR1a where the prime mover 5 is disposed and an electric motor room MR2a where the electric motor 5 is disposed. and a unit room MR1b in which the slave control unit 6 is placed.

[0103] In this embodiment, the second partition wall 90 is a plate that extends in the front-rear and up-down directions, and is disposed along the surface facing the other (left) side in the lateral direction of the other (left) support legs 220, 220. As a result, with the second partition wall 90 as the boundary, one (right) side in the lateral direction is a motor chamber MR1a, and the other (left) side in the lateral direction is a unit chamber MR1b.

[0104] 12, the second partition wall 90 includes a wall main body 90a made of a single metal plate and a bracket 90b attached to the surface of the wall main body 90a facing the unit chamber MR1b, to which the electronic control unit 6 is fixed. The second partition wall 90 (wall main body 90a) has a wiring hole 900 through which the wiring PL is arranged across the motor chamber MR1a and the unit chamber MR1b. Accordingly, the second partition wall 90 includes a sealing member 93 that seals the gap between the outer periphery of the wiring PL and the inner periphery of the wiring hole 900.

[0105] The work machine 1 of this embodiment is provided with a partition member 9 that includes a second partition wall 90. In addition to the second partition wall 90, the partition member 9 also includes a second sub-wall 81b.

[0106] 12, the second partition 90 of this embodiment has a wall main body 90a that extends in the front-rear and up-down directions. In the partition member 9, an edge of the second partition 90 on the driver's seat 10 side is connected to one lateral edge of the second sub-wall 81b. That is, the edge of the second partition 90 on the driver's seat 10 side is formed to follow the surface of the second sub-wall 81b on the machinery compartment MR side. Specifically, the edge of the second partition 90 on the driver's seat 10 side includes: a first inclined end E1 that follows the second sub-wall 81b of the first inclined partition portion 8a; a second inclined end E2 that continues from the first inclined end E1 and follows the second sub-wall 81b of the second inclined partition portion 8b; and a horizontal end E3 that continues from the second inclined end E2 and follows the second sub-wall 81b of the ceiling partition portion 8c.

[0107] Accordingly, the first inclined end E1 is connected to one lateral edge of the second sub-wall 81b of the first inclined partition portion 8a, the second inclined end E2 is connected to one lateral edge of the second sub-wall 81b of the second inclined partition portion 8b, and the horizontal end E3 is connected to one lateral edge of the second sub-wall 81b of the ceiling partition portion 8c. As a result, the second partition 90 is in close contact with the second sub-wall 81b of the second wall 81 on the driver's seat 10 side.

[0108] Furthermore, the second partition wall 90 includes, as its edge on the machine room MR side, an upright edge E4 that is continuous with the rear end (rear end) of the horizontal edge E3 in the front-to-rear direction and extends in the vertical direction, and a lower edge E5 that connects the lower end of the second inclined edge E2 with the lower end of the upright edge E4 and extends in the front-to-rear direction. In this embodiment, the lower edge E5 of the second partition wall 90 (wall main body 90a) includes a linear edge E5a that extends straight from the lower end of the first inclined edge E1 to the rear side in the front-to-rear direction, and an inclined edge E5b that extends rearward from the rear end of the linear edge E5a and angles upward as it extends rearward, and is connected to the lower end of the upright edge E4.

[0109] The partition member 9 has a bottom wall 91 extending laterally from the lower end E5 of the second partition wall 90. That is, the partition member 9 includes the bottom wall 91 extending from the lower end E5 (straight edge E5a and inclined edge E5b) of the second partition wall 90 toward the unit chamber MR1b and in close contact with the first partition wall 8 on the machine chamber MR side. The front edge of the bottom wall 91 in the front-to-rear direction is connected to the lower end of the second sub-wall 81b (the second sub-wall 81b of the first inclined partition portion 8a). As described above, because the lower end E5 of the second partition wall 90 includes the straight edge E5a and the inclined edge E5b, the bottom wall 91 is bent at a midpoint in the front-to-rear direction (a position corresponding to the connection position of the straight edge E5a and the inclined edge E5b).

[0110] The partition member 9 is fixed to the support leg 220 on the other (left) side in the horizontal direction. Specifically, because the second partition wall 90 is part of the partition member 9, the partition member 9 is overlapped with the support leg 220 on the other (left) side in the horizontal direction from the other side in the horizontal direction, with the first inclined end E1, the second inclined end E2, and the horizontal end E3 of the second partition wall 90 aligned with the support legs 220 on the other side, and then fixed to the support leg 220. In the present embodiment, in the above-described manner, the second sub-wall 81b faces the first sub-wall region 80b of the first wall 80 with a gap therebetween. In the present embodiment, as shown in FIGS. 7 and 8 , a vibration damping member 86 is arranged between the first sub-wall region 80b of the first wall 80 and the second sub-wall 81b. The vibration damping member 86 is a plate-shaped elastic material, and is sandwiched between the second sub-wall 81b and the first sub-wall region 80b of the first wall 80.

[0111] Furthermore, as described above, when the second partition wall 90 (partition wall member 9) is fixed to the support leg 220 on the other (left) side in the lateral direction, as shown in FIG. 10 , the upright end E4 of the second partition wall 90 comes into tight contact with the surface of the second region 705 (partition wall portion 705b) of the rear exterior member 702 facing forward in the front-to-rear direction via a seal member. The first exterior cover 700 closes the unit chamber MR1b from the other side in the lateral direction. That is, when the unit chamber MR1b is closed, the first exterior cover 700 comes into tight contact with the second sub-wall 81b of the second wall 81, the bottom wall 91, and the second region 705 (partition wall portion 705b) of the rear exterior member 702, thereby sealing the unit chamber MR1b.

[0112] That is, the second sub-wall 81b of the second wall 81, the bottom wall 91, and the second portion 705 (partition wall portion 705b) of the rear exterior member 702 define an opening that opens the unit chamber MR1b to the other lateral (left) side, and therefore the first exterior cover 700 comes into close contact with these members directly or indirectly when closing the unit chamber MR1b. In this embodiment, a seal member is disposed between the second sub-wall 81b of the second wall 81, the bottom wall 91, and the second portion 705 (partition wall portion 705b) of the rear exterior member 702 and the first exterior cover 700. This isolates the unit chamber MR1b from the motor chamber MR1a, preventing hot air from entering the unit chamber MR1b from the motor chamber MR1a.

[0113] As shown in FIGS. 5 and 12, the work machine 1 is provided with a heat insulating member 92 that provides thermal insulation from the motor compartment MR1a side to the unit compartment MR1b side. In this embodiment, the heat insulating member 92 is glass wool. The heat insulating member 92 is laminated on the surface of the second partition wall 90 (wall main body 90a) facing the motor compartment MR1a side. More specifically, the electronic control unit 6 is fixed to the second partition wall 90. That is, the electronic control unit 6 is fixed to the surface of the second partition wall 90 facing the other (left) side in the lateral direction. In this embodiment, the electronic control unit 6 is screwed to the second partition wall 90 (bracket 90b in this embodiment). Accordingly, the heat insulating member 92 is arranged at least in the area of ​​the second partition wall 90 that overlaps with the electronic control unit 6.

[0114] 5 to 7, the electronic control unit 6 of this embodiment is configured so that the connected wiring PL is routed downward. That is, the wiring PL connected to the electronic control unit 6 hangs downward from the electronic control unit 6. Accordingly, the wiring hole 900 is provided on the lower side of the electronic control unit 6. In this embodiment, the electronic control unit 6 is a control device (ECU) that controls the internal combustion engine (diesel engine) that is the prime mover 5, and therefore the wiring PL connected to the electronic control unit 6 has a large diameter. Therefore, when the wiring PL is bent and routed, it is difficult to bend it with a small radius of curvature compared to a small-diameter wiring PL.

[0115] In consideration of this, the wiring hole 900 is disposed below the electronic control unit 6 attached to the second partition wall 90 (wall main body 90a). That is, the wiring hole 900 is disposed at a position overlapping with the wiring PL that is connected to and hangs down from the electronic control unit 6. The wiring hole 900 is also set to a size that allows the wiring PL that hangs down in the vertical direction to be bent and the wiring PL to be inserted obliquely. That is, the size W (see FIG. 12) of the wiring hole 900 in the front-rear direction is set to a size that allows the wiring PL to be bent and passed through at an angle. 13, the vertical size H of the wiring hole 900 is set to be larger than the diameter d of the wiring PL. On the other hand, as shown in FIG. 13, the vertical size H of the wiring hole 900 is set to be larger than d / sinθ, where d is the diameter of the wiring PL and θ is the inclination angle (acute angle with respect to the center line of the second partition wall 90 (wall main body 90a) extending in the vertical direction) of the wiring PL (center line of the wiring PL) that passes through the wiring hole 900 in the second partition wall 90 after the vertically hanging wiring PL is curved inside the unit chamber MR1b.

[0116] Taking into consideration the increase in the size of the wiring hole 900, in this embodiment, as shown in Figure 12, the sealing member 93 includes a cover member 94 that covers the wiring hole 900 from the unit chamber MR1b side, and has a wiring insertion portion 940 that allows the wiring PL to be taken out in a direction perpendicular to the lateral direction (second direction), and a grommet 95 that is fitted into the wiring insertion portion 940 and through which the wiring PL can be inserted.

[0117] The cover member 94 includes a cover main body 941 that covers the wiring hole 900 and the wiring PL inserted into the wiring hole 900 from the other lateral side, and a flange 942 that extends outward from the periphery of the cover main body 941 and is configured to be overlapped on the second partition wall 90 around the periphery of the wiring hole 900.

[0118] In this embodiment, the cover main body 941 includes an outer peripheral wall portion 941a formed in accordance with the hole shape of the wiring hole 900, and includes an outer peripheral wall portion 941a extending from one side to the other in the horizontal direction, and a closing portion 941b that closes the area surrounded by the edge on the other side of the outer peripheral wall portion 941a in the horizontal direction.

[0119] The wiring insertion portion 940 is disposed at a position corresponding to the wiring PL (hanging wiring PL) connected to the electronic control unit 6. The wiring insertion portion 940 is configured as a notch or hole provided in the outer peripheral wall portion 941a. In the present embodiment, the wiring insertion portion 940 is configured as a rectangular notch formed by cutting out a portion of the outer peripheral wall portion 941a from one side to the other in the horizontal direction. The outer peripheral wall portion 941a is formed so that, when the cover member 94 is attached to the second partition wall 90 (wall main body 90a), the wiring insertion portion 940 (notch) faces obliquely upward and rearward, creating a space between the blocking portion 941b and the second partition wall 90 (wall main body 90a) in which the wiring PL that has passed through the wiring insertion portion 940 can be placed.

[0120] Accordingly, in the circumferential direction of the outer peripheral wall portion 941a, the horizontal size of at least the portion where the wire insertion portion 940 is formed is set to be larger than the diameter d of the wire PL. More specifically, in the circumferential direction of the outer peripheral wall portion 941a, the horizontal size of at least the portion where the wire insertion portion 940 is formed is set to be larger than the maximum dimension in the second direction of an attachment portion 950 (described later) of the grommet 95 through which the wire PL is inserted.

[0121] More specifically, in this embodiment, in a predetermined upper range extending downward from the top end of the outer peripheral wall portion 941a in the vertical direction, which upper range includes the wire insertion portion 940 of the outer peripheral wall portion 941a, the lateral size is set to a constant size larger than the diameter d of the wire PL, and in a lower range below the upper range of the outer peripheral wall portion 941a, the lateral size is formed to become smaller toward the lower end of the outer peripheral wall portion 941a. Accordingly, the blocking portion 941b includes an upper region 943a that is spaced a constant distance from the second partition wall 90 (wall main body 90a), and a lower region 943b that is inclined downward from the upper region 943a toward the second partition wall 90 (wall main body 90a).

[0122] As a result, of the space formed between the cover body 941 and the second partition 90, the upper space area facing downward from the wiring insertion portion 940 becomes a space through which the wiring PL extending in the vertical direction is interposed, and the lower space area below the upper space area becomes a space in which the wiring PL can be guided into the wiring hole 900.

[0123] The flange 942 extends outward from one lateral edge of the outer peripheral wall portion 941a in a direction perpendicular to the plane of the outer peripheral wall portion 941a. The flange 942 is overlapped and fixed to the second partition wall 90 (wall main body 90a) with the outer peripheral wall portion 941a aligned along the outer periphery of the wiring hole 900. In this embodiment, the cover member 94 (flange 942) is fixed to the second partition wall 90 (wall main body 90a) by screws.

[0124] The grommet 95 is molded from a rubber material or an elastic resin material. In the present embodiment, the grommet 95 has an attachment portion 950 that can be attached to the wire insertion portion 940 of the cover member 94, and has an insertion hole 950a formed therein through which the wire PL is inserted. The grommet 95 of the present embodiment has an inner hole formed therein through which the wire PL can be inserted, and a cylindrical bellows portion 951 that is connected to the attachment portion 950 with the inner hole communicating with the insertion hole 950a, and the bellows portion 951 through which the wire PL can be inserted.

[0125] The mounting portion 950 is formed in accordance with the shape of the wiring insertion portion 940. In this embodiment, since the wiring insertion portion 940 is formed in a rectangular shape, the mounting portion 950 is plate-shaped and formed in a rectangular shape in a plan view. Also, a groove into which the peripheral edge of the wiring insertion portion 940 of the outer peripheral wall portion 941a is fitted is formed along the entire periphery at a midpoint in the thickness direction of the mounting portion 950.

[0126] In grommet 95 configured as described above, mounting portion 950 is attached to wire insertion portion 940 with bellows portion 951 extending into the upper space region. As described above, wire insertion portion 940 is disposed at a position corresponding to the wiring PL (hanging wiring PL) connected to electronic control unit 6, and therefore insertion hole 950a of grommet 95 (mounting portion 950) is also disposed at a position corresponding to the wiring PL (hanging wiring PL) connected to electronic control unit 6. The diameter of bellows portion 951 decreases from the mounting portion 950 side toward the tip, and the inner peripheral surface of at least the tip portion is adapted to be in close contact with the outer peripheral surface of the wiring PL inserted into the inner hole.

[0127] As described above, in the work machine 1 of this embodiment, as shown in Fig. 5, the machine room MR (first machine room MR1) separated from the driver's cab DR by the first partition wall 8 is separated by the second partition wall 90 into a motor room MR1a in which the motor 5 is disposed and a unit room MR1b in which the electronic control unit 6 that controls the motor 5 is disposed. As a result, although the electronic control unit 6 is disposed in the unit room MR1b adjacent (close to) the motor room MR1a (area) in which the motor 5 is disposed, the second partition wall 90 places the electronic control unit 6 in an environment that is less susceptible to the effects of heat generated by the motor 5.

[0128] Furthermore, since the second partition wall 90 (wall main body 90a in this embodiment) has a wiring hole 900, the wiring PL is inserted through the wiring hole 900 to connect the prime mover 5 and the electronic control unit 6. As a result, the wiring PL connects the prime mover 5 and the electronic control unit 6 over the shortest distance. Furthermore, since the sealing member 93 seals (blocks) the gap between the inner periphery of the wiring hole 900 and the outer periphery of the wiring PL, hot air from the prime mover chamber MR1a is prevented from flowing into the unit chamber MR1b, preventing a rise in temperature inside the unit chamber MR1b. This prevents the electronic control unit 6 from malfunctioning due to thermal effects. In other words, the work machine 1 of this embodiment not only facilitates the routing of the wiring PL connecting the prime mover 5 and the electronic control unit 6, but also suppresses the thermal effects of the prime mover 5, while it is running, on the electronic control unit 6 that controls the prime mover 5.

[0129] In particular, the second partition wall 90 includes a wall body 90a and a bracket 90b, and the electronic control unit 6 is fixed to the bracket 90b, so that the electronic control unit 6 is separated from the wall body 90a (floating), and therefore the electronic control unit 6 does not come into surface contact with the wall body 90a. This also reduces the thermal effect (heat transfer) of the second partition wall 90 (wall body 90a) on the electronic control unit 6.

[0130] In addition, the work machine 1 is provided with a partition member 9 including a second partition 90, and the partition member 9 includes a bottom wall 91 extending from the lower end of the second partition 90 toward the unit chamber MR1b and closely contacting the first partition 8 on the machine chamber MR side.Therefore, the bottom wall 91 separates the work machine MR from the machine chamber MR even below the unit chamber MR1b, and the thermal impact from the machine chamber MR on the electronic control unit 6 in the unit chamber MR1b is more reliably suppressed.

[0131] Furthermore, since the hood includes an exterior member including the partition wall portion 705b and the first exterior cover 700, the rear side of the unit chamber MR1b is also separated from the machinery chamber MR, and the unit chamber MR1b is closed by the first exterior cover 700. This ensures that the electronic control unit 6 is protected not only from the thermal influence of the machinery chamber MR, but also from external influences (rain, wind, etc.).

[0132] Furthermore, since the hood includes second exterior cover 710 provided with intake holes 710a that draw outside air into motor compartment MR1a, fresh outside air is drawn into motor compartment MR1a through intake holes 710a, thereby preventing an excessive temperature rise inside motor compartment MR1a.

[0133] Furthermore, the bonnet includes a first bonnet 701 that covers the prime mover 5 between the first exterior cover 700 and the second exterior cover 710, and the first bonnet 701 and the exterior member define the prime mover chamber MR1a, so that the prime mover 5 and other equipment within the prime mover chamber MR1a are reliably protected.

[0134] Furthermore, the swivel base 21 (frame 21) includes a base plate 210 that supports the driver's seat 10 and the prime mover 5, and the base plate 210 has, in an area corresponding to the prime mover chamber MR1a, exhaust holes 210a (212a) that discharge the air in the prime mover chamber MR1a to the outside, the exhaust holes 210a (212a) that penetrate in the vertical direction, so that the hot air in the prime mover chamber MR1a is released to the outside, suppressing a rise in the temperature of the prime mover chamber MR1a. Accordingly, the thermal influence from the prime mover chamber MR1a onto the inside of the unit chamber MR1b through the second partition wall 90 is further reduced.

[0135] 14, in the motor chamber MR1a, the fan 53 is disposed closer to the second exterior cover 710 than the motor 5, and therefore, by driving the fan 53, outside air is taken into the motor chamber MR1a and hot air inside the motor chamber MR1a is forcibly discharged to the outside, minimizing the temperature rise inside the motor chamber MR1a. This further reduces the thermal influence from the motor chamber MR1a onto the unit chamber MR1b through the second partition wall 90.

[0136] In particular, because the openings 210a (the numerous holes 212a in the perforated metal 212) in the base plate 210 of the swivel base 21 serve as exhaust ports, the drive (intake) of the fan 53 causes the outside air to flow laterally from one side (right) to the other side (left), and then flows (exhaust) from top to bottom. As a result, the air (hot air) in the upper space of the motor chamber MR1a flows toward the exhaust port without stagnating. As a result, even if the DPF 50, which becomes hot, is disposed above the motor 5, the temperature rise in the upper space of the motor chamber MR1a (the area corresponding to the second partition wall 90) is minimized. Therefore, because the temperature rise in the second partition wall 90 is minimized, the thermal effect on the electronic control unit 6 fixed to the second partition wall 90 is also minimized, and the occurrence of failure or malfunction of the electronic control unit 6 is also minimized.

[0137] Furthermore, since the heat insulating member 92 is laminated on the surface of the second partition wall 90 facing the motor chamber MR1a, the heat from the motor chamber MR1a is less likely to be transmitted to the second partition wall 90 (wall main body 90a). This reduces or eliminates the thermal impact on the unit chamber MR1b. In particular, since glass wool is used for the heat insulating member 92, the heat insulating effect on the second partition wall 90 is extremely high.

[0138] In particular, since the electronic control unit 6 is fixed to the second partition 90 and the insulating member 92 is positioned at least in the area of ​​the second partition 90 that overlaps with the electronic control unit 6, even when the electronic control unit 6 is fixed to the second partition 90, insulation is achieved by the insulating member 92 on the back side (corresponding position).

[0139] Furthermore, since sealing member 93 includes cover member 94 and grommet 95 through which wiring PL can be inserted, cover member 94 covers wiring hole 900 and wiring PL inserted through wiring hole 900, and grommet 95 closes the gap between cover member 94 and wiring PL. As a result, even if wiring hole 900 is formed with a large size that makes it easy to insert wiring PL, the gap between wiring PL and the insertion portion is closed, and unit chamber MR1b and motor chamber MR1a are airtightly separated.

[0140] The above-described embodiment has been described above, and the present invention (preferable embodiments thereof) provides a work machine 1 described in the following items (items 1 to 11).

[0141] (Item 1) a first partition wall 8 that divides the frame 21 into the engine room MR1a and a space on the engine room MR1a on the side of the engine room MR1a facing the driver's seat 10; a second partition wall 90 that has an edge that is in close contact with the first partition wall 8 and that divides the engine room MR1a and the unit room MR1b.

[0142] According to the work machine 1 of item 1, although the electronic control unit 6 is disposed in the unit chamber MR1b adjacent (close to) the motor chamber MR1a (area) in which the motor 5 is disposed, the second partition wall 90 places the electronic control unit 6 in an environment that is less susceptible to the effects of heat generated by the motor 5. Therefore, even if the work machine 1 of item 1 places the electronic control unit 6 close to the motor 5, it is possible to suppress the effect of heat from the driving motor 5 on the electronic control unit 6 that controls the motor 5.

[0143] (Item 2) The work machine 1 described in item 1 is provided with a partition member 9 including the second partition 90, and the partition member 9 includes a bottom wall 91 extending from the lower end of the second partition 90 toward the unit chamber MR1b, and including a bottom wall 91 that is in close contact with the first partition 8 on the driver's seat 10 side.

[0144] According to the work implement 1 of item 2, the partition member 9 including the second partition 90 has a bottom wall 91, and the lower part of the unit chamber MR1b is separated from the motor chamber MR1a by the bottom wall 91, so that the thermal effect of the motor chamber MR1a on the electronic control unit 6 in the unit chamber MR1b is more reliably suppressed. Also, because the partition member 9 has the second partition 90 and the bottom wall 91, both the second partition 90 and the bottom wall 91 can be appropriately positioned by appropriately positioning a single member.

[0145] (Item 3) Item 2. The work machine 1 described in item 2, comprising: an exterior body 7 that covers a machine room MR including the motor room MR1a and the unit room MR1b; and a partition wall portion 705b that is in close contact with an edge portion of the second partition wall 90 that is in close contact with the first partition wall 8 and an edge portion different from the lower end and that extends in the same direction as the bottom wall, wherein the exterior body 7 faces the second partition wall 90 at an interval on one side in the second direction and includes a first exterior cover 700 that covers the electronic control unit 6 in the unit room MR1b on the one side in the second direction, the first exterior cover 700 being able to come into close contact with the partition wall portion 705b.

[0146] According to the work machine 1 of item 3, the unit room MR1b is separated from the engine room MR1a by the partition wall portion 705b, and the unit room MR1b is closed by the first exterior cover 700, so the electronic control unit 6 is reliably protected not only from the thermal influence from the machine room MR but also from external influences (rain, wind, etc.).

[0147] (Item 4) The work machine according to any one of items 1 to 3, wherein the electronic control unit 6 is fixed to the second partition wall 90.

[0148] According to the work machine 1 of item 4, the electronic control unit 6 is fixed to the second partition wall 90, which is a structural body, and therefore the arrangement of the electronic control unit 6 is stable.

[0149] (Item 5) The work machine 1 according to any one of items 1 to 4, wherein the second partition wall 90 is formed of a metal plate.

[0150] According to the work machine 1 of item 5, the second partition 90 is made of a rigid metal plate, which allows for high strength, and furthermore, a highly rigid structure is formed through the synergistic effect of the first partition 8 and the like.

[0151] (Item 6) The exterior body 7 includes a second exterior cover 710 that covers the equipment on the frame 21 from the other side in the second direction on the opposite side from the first exterior cover 700 in the second direction, and the second exterior cover 710 is provided with an intake hole 710a that takes in outside air into the motor compartment MR1a.The work machine 1 described in item 3, or item 4 or item 5 that cites item 3.

[0152] According to the work machine 1 of item 6, fresh outside air is taken into the motor compartment MR1a through the intake holes 710a of the second exterior cover 710, so that an excessive temperature rise inside the motor compartment MR1a is prevented.

[0153] (Item 7) The work machine described in any one of items 1 to 6, wherein the frame 21 includes a base plate 210 that supports the driver's seat 10 and the prime mover 5, and the base plate 210 is provided with an exhaust hole 210a (212a) that discharges air from the prime mover chamber MR1a to the outside.

[0154] According to the work machine 1 of item 7, the hot air in the engine room MR1a is released downward from the exhaust hole 210a (212a) of the base plate 210, thereby suppressing the temperature rise in the engine room MR1a and further reducing the thermal impact from the engine room MR1a into the unit room MR1b through the second partition wall 90.

[0155] (Item 8) The work implement 1 described in item 6 includes a forced air-cooled radiator 51 that cools the engine 5 and is arranged in the engine compartment MR1a, and the forced air-cooled radiator 51 is arranged closer to the second exterior cover 710 than the engine 5.

[0156] According to the work machine 1 of item 8, the forced air-cooling radiator 51 is driven (the fan 53 that cools the radiator 51 is driven), so that the outside air is taken into the engine room MR1a and the hot air in the engine room MR1a is forcibly discharged to the outside. As a result, the thermal influence from the motor chamber MR1a into the unit chamber MR1b through the second partition wall 90 is further reduced.

[0157] (Item 9) A work machine 1 described in any one of items 1 to 8, which is provided with an insulating member 92 on the surface of the second partition 90 facing the motor chamber MR1a, which suppresses heat conduction from the motor chamber MR1a side to the unit chamber MR1b side.

[0158] According to the work machine 1 of item 9, the heat in the motor chamber MR1a is less likely to be transferred to the second partition wall 90 (the wall itself) due to the presence of the heat insulating member 92, so the thermal effect on the unit chamber MR1b is also reduced or eliminated.

[0159] (Item 10) The work machine 1 described in item 9, wherein the electronic control unit 6 is fixed to the second partition wall 90, and the heat insulating member 92 is arranged at least in the area of ​​the second partition wall 90 that overlaps with the electronic control unit 6.

[0160] According to the work machine 1 of item 10, even if the electronic control unit 6 is fixed to the second partition wall 90, thermal insulation is achieved by the heat insulating member 92 on the back side (corresponding position) of the second partition wall 90 relative to the electronic control unit 6.

[0161] (Item 11) The work machine 1 described in any one of items 1 to 10, wherein the second partition 90 has a wiring hole 900 through which wiring PL connecting the prime mover 5 and the electronic control unit 6 is arranged across the prime mover chamber MR1a and the unit chamber MR1b, and is provided with a sealing member 93 that seals the gap between the outer periphery of the wiring PL and the inner periphery of the wiring hole 900.

[0162] According to the work machine 1 of item 11, the wiring PL connects the prime mover 5 and the electronic control unit 6 via the wiring hole 900 over the shortest distance, and the sealing member 93 seals (blocks) the gap between the inner periphery of the wiring hole 900 and the outer periphery of the wiring PL. This prevents hot air from the prime mover chamber MR1a from flowing into the unit chamber MR1b, which in turn prevents the temperature inside the unit chamber MR1b from rising, thereby preventing the electronic control unit 6 from malfunctioning due to the effects of heat.

[0163] (Item 12) The work machine 1 described in item 11, wherein the sealing member 93 includes a cover member 94 that covers the wiring hole 900 on the unit chamber MR1b side, the cover member 94 having a wiring insertion portion 940 through which the wiring PL can be taken out in a direction perpendicular to the second direction, and a grommet 95 that is fitted into the wiring insertion portion 940 and through which the wiring PL can be inserted.

[0164] According to the work machine 1 of item 12, even if the wiring hole 900 is formed to a large size that makes it easy to insert the wiring PL, the space between the wiring PL and the insertion portion is closed, and the unit chamber MR1b and the motor chamber MR1a are airtightly separated.

[0165] The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.

[0166] In the above embodiment, a backhoe has been described as an example of the work machine 1, but the work machine 1 is not limited to a backhoe. For example, the work machine 1 may be a construction machine other than a backhoe, or may be an agricultural machine such as a tractor.

[0167] In the above embodiment, the work machine 1 includes the partition member 9, and the partition member 9 includes the second partition wall 90, the bottom wall 91, and the second wall 81 portion (second sub-wall 81b), which are integrated together, but this is not limiting. For example, the second partition wall 90, the second wall 81 portion (second sub-wall 81b), and the bottom wall 91 may each be configured as separate, independent components.

[0168] In the above embodiment, the second wall 81 is divided into the second main wall 81a and the second sub-wall 81b, but this is not limiting. When the first partition wall 8 is a double wall, the first wall 80 and the second wall 81 may each be formed from a single metal plate. That is, the second wall 81 may be a single wall formed by combining the second main wall 81a and the second sub-wall 81b, and may be a single wall that faces the first wall 80 in its entirety.

[0169] In the above embodiment, the second partition wall 90 (wall main body 90a) remains at a midpoint in the fore-and-aft direction of the machine chamber MR (first machine chamber MR1), and accordingly, the bottom wall 91 and exterior member are provided, which define a portion of the first machine chamber MR1 as the unit chamber MR1b. However, this is not limiting. For example, the rear end of the second partition wall 90 in the fore-and-aft direction may be extended to the rear end of the second area A2, and the lower end of the second partition wall 90 may be extended to the base plate 210. In this way, the first machine chamber MR1 is partitioned laterally into the prime mover chamber MR1a and the unit chamber MR1b, and hot air from inside the prime mover chamber is prevented from flowing into the unit chamber MR1b.

[0170] In the above embodiment, the second partition wall 90 is a single wall, but is not limited to this. For example, like the first partition wall 8, the second partition wall 90 may also be a double wall or a wall with more overlapping layers. [Explanation of symbols]

[0171] 1: Work equipment 2: Aircraft 3: Running gear 5: Prime mover 6: Electronic control unit 8 :1st bulkhead 9: Partition member 10: Driver's seat 21: Frame (swivel base) 51: Radiator 90:Second bulkhead 92: Heat insulating material 93: Sealing member 94: Cover member 95: Grommet 210: Base plate 213: Partition wall 700: Exterior member (exterior cover, first exterior cover) 701: Exterior parts (exterior cover, first bonnet) 705b: Partition wall 710: Exterior member (second exterior cover) 710a: Air intake 711: Exterior parts (exterior cover, second hood) 900: Wiring hole 940: Wiring insertion part DR: Driver's cab MR: Machine room MR1: 1st machine room MR1a: Engine room MR1b: Unit room MR2: 2nd machine room PL:Wiring

Claims

1. an airframe including a frame; a driver's seat supported by the frame; a motor chamber accommodating a motor aligned in a first direction with respect to the driver's seat and supported by the frame; a unit chamber arranged in a second direction intersecting the first direction with respect to the engine chamber and accommodating an electronic control unit for controlling the engine; a first partition wall that divides the frame in the first direction into the engine compartment and a space on the driver's seat side of the engine compartment; A work machine comprising: a second partition having an edge portion in close contact with the first partition, the second partition separating the motor chamber and the unit chamber.

2. a partition member including the second partition, The work machine according to claim 1 , wherein the partition member includes a bottom wall that extends from a lower end of the second partition wall toward the unit compartment and that is in close contact with the first partition wall on the driver's seat side.

3. an exterior body covering a machine room including the engine room and the unit room; a partition wall portion that is in close contact with an edge portion of the second partition wall that is in close contact with the first partition wall and an edge portion that is different from the lower end portion, and that extends in the same direction as the bottom wall, The exterior body is 3. The work machine according to claim 2, further comprising: a first exterior cover that faces the second partition wall at a distance on one side in the second direction and covers the electronic control unit in the unit chamber on the one side in the second direction, the first exterior cover being capable of being in close contact with the partition wall portion.

4. The work machine according to claim 1 , wherein the electronic control unit is fixed to the second partition wall.

5. The work machine according to claim 1 , wherein the second partition wall is formed of a metal plate.

6. The exterior body is a second exterior cover that covers the device on the frame from the other side in the second direction on the opposite side to the first exterior cover in the second direction, The work machine according to claim 3, wherein the second exterior cover is provided with an intake hole for taking outside air into the motor chamber.

7. The frame is a base plate supporting the driver's seat and the prime mover; 2. The work machine according to claim 1, wherein the base plate is provided with an exhaust hole for discharging air from inside the engine chamber to the outside.

8. a forced air-cooled radiator for cooling the engine, the forced air-cooled radiator being disposed in the engine compartment; The work machine according to claim 6, wherein the forced air-cooled radiator is disposed closer to the second exterior cover than the prime mover.

9. The work machine according to claim 1, further comprising a heat insulating member on a surface of the second partition wall facing the engine compartment to suppress heat conduction from the engine compartment to the unit compartment.

10. the electronic control unit is fixed to the second bulkhead; The heat insulating member is disposed at least in a region of the second partition wall that overlaps with the electronic control unit.

10. The work machine according to claim 9, wherein

11. The work machine according to claim 1, wherein the second partition has a wiring hole through which wiring connecting the prime mover and the electronic control unit is arranged across the prime mover chamber and the unit chamber, and is provided with a sealing member that seals the gap between the outer periphery of the wiring and the inner periphery of the wiring hole.

12. The sealing member is a cover member that covers the wiring hole on the unit chamber side, the cover member having a wiring insertion portion through which the wiring can be taken out in a direction perpendicular to the second direction; The work machine according to claim 11, further comprising a grommet fitted to the wire insertion portion, the grommet through which the wire can be inserted.

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