Working machinery

Abstract

To provide a work machine improved in maintenance workability.SOLUTION: An excavation work machine 1 has a first frame part 91 provided in the longitudinal direction of a revolving frame in a supporting and opening / closing structure of an upper face cover 11 covering an upper side of a side part engine room 11a of the right side of the revolving frame and a right external cover 14 covering the right side, and a second frame part 92 provided orthogonally to the first frame part 91, with a base end connected to the first frame part 91 and the other end connected to the right external cover 14.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a work machine and relates to a support and opening / closing structure of an exterior cover that covers an engine room in which a prime mover and equipment are arranged.

Background Art

[0002] Conventionally, in a work machine, an engine room that houses a prime mover is covered with an exterior cover. In the engine room, in addition to the prime mover, tanks, a heat exchanger that cools fluids such as engine cooling water, and equipment such as a battery are arranged, and these tanks and equipment require regular maintenance. For this reason, the exterior cover is opened as needed so that maintenance technicians can perform maintenance.

[0003] Patent Document 1 discloses an example in a work machine provided with a cabin in which a driver's seat is arranged on the left side of the mounting position of a front work machine and an engine room on the right side, and provided with an opening / closing cover in which a front surface portion, an upper surface portion, and a right surface portion that respectively cover the front side, the upper side, and the right side of the engine room are integrally formed. Such an opening / closing cover is configured to open and swing with the left edge portion of the upper surface portion as a fulcrum.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the opening and closing cover for a work machine disclosed in Patent Document 1, opening the cover exposes the front, top, and right side of the engine room to the outside. On the other hand, the timing of maintenance for equipment located in the engine room varies depending on the use and specifications of each piece of equipment. For example, the frequency of battery replacement is lower than the frequency of refueling the fuel tank, and if only refueling the fuel tank is performed, it is sufficient to open only the surface covering the fuel tank's filler neck, and it is not necessary to open all surfaces of the engine room, including the front, top, and right side. Opening the cover allows foreign matter such as water, insects, and dirt to enter the engine room, which may shorten the lifespan of the equipment. Furthermore, an opening and closing cover that integrates the surfaces covering three sides of the engine room, as in Patent Document 1, becomes heavy, which poses a significant burden on maintenance technicians when opening and closing the cover.

[0006] This invention has been made in view of the above-mentioned problems, and aims to provide a work machine that improves workability during maintenance. [Means for solving the problem]

[0007] The work machine according to the present invention comprises a vehicle body frame, an engine room provided on the vehicle body frame and housing a prime mover and equipment, and a plurality of exterior covers covering the engine room, and is characterized by comprising a first frame portion provided along the front-rear direction of the vehicle body frame in a plan view, and a second frame portion whose base end is connected to the first frame portion and whose other end is connected to a side cover of the exterior cover that covers the side of the engine room.

[0008] In another aspect of the present invention, the working machine is such that the second frame portion is rotatably supported by the first frame portion via the first hinge portion.

[0009] In another aspect of the present invention, the work machine is such that the upper cover, which covers the upper surface of the engine room, is rotatably supported on the first frame via a second hinge.

[0010] Another aspect of the present invention relates to a work machine comprising a first hinge portion having a first pivot that pivotally supports the base end of the second frame portion, a cover mounting portion that connects the upper cover, and a second hinge portion having a second pivot that pivotally supports the cover mounting portion.

[0011] In another aspect of the present invention, the working machine is provided with the first pivot on the first frame portion and the second pivot on the base end side of the second frame portion.

[0012] In another aspect of the present invention, the working machine is such that the first and second pivots are provided on the first frame.

[0013] In another aspect of the present invention, the working machine is such that the first pivot and the second pivot are located on the same axis.

[0014] In another aspect of the present invention, the working machine is characterized in that the second frame portion has a first holding portion that maintains the rotation angle of the second frame portion at a predetermined angle.

[0015] In another aspect of the present invention, the working machine is characterized in that the second frame portion has a second holding portion that holds the rotation angle of the upper cover at a predetermined angle.

[0016] In another aspect of the present invention, the working machine is characterized in that the second frame portion has a biasing portion that biases the rotation of the second frame portion.

[0017] In another aspect of the present invention, the working machine has a second frame portion having a first link portion and a second link portion arranged spaced apart from each other with respect to the first frame portion, and each of the first link portion and the second link portion connects the first frame portion and the side cover.

[0018] The work machine according to another aspect of the present invention is such that the first frame portion is connected to the vehicle body frame via a support column.

[0019] The work machine according to another aspect of the present invention is such that the support column has a first support column and a second support column. The first support column has a linear shape and supports the first frame portion from below, and the second support column has a bent shape and supports the first frame portion from the side.

[0020] The work machine according to another aspect of the present invention is such that a partitioning portion for partitioning the space in the engine room is provided between the first support column and the second support column.

[0021] The work machine according to another aspect of the present invention is such that the first frame portion is formed by bending one end, and while connecting this one end to the vehicle body frame, the other end is connected to the vehicle body frame via the first support column.

[0022] The work machine according to another embodiment of the present invention is such that a storage tank capable of storing liquid is arranged in the engine room, and the first frame portion has a mounting portion for mounting the storage tank. クが配置され、前記第1フレーム部は、前記貯留タンクを取り付ける取付部を有する、も のである。 Another embodiment of the present invention provides a work machine comprising a slewing frame, a cabin located on the upper left side of the slewing frame, and an engine room located on the upper right side of the slewing frame, wherein the work machine further comprises a right exterior cover covering the right side of the engine room and an upper cover covering the upper part of the engine room, the upper cover being rotatable above the right exterior cover with the left edge of the upper cover as a pivot point, and the right exterior cover being rotatable integrally with the upper cover with the left edge of the upper cover as a pivot point. In another embodiment of the present invention, the working machine comprises an engine room having a first frame portion provided along the front-rear direction on the cabin side, and a second frame portion whose base end is rotatably supported by the first frame portion, wherein the tip of the second frame portion is attached to the inner wall of the right exterior cover. In another embodiment of the present invention, the work machine is such that the top cover is rotatably mounted on the upper part of the second frame.

Effect of the Invention

[0023] According to the present invention, in the support and opening / closing structure of the exterior cover that covers the engine room in which the prime mover and equipment are arranged, it becomes possible to improve the workability during maintenance.

Brief Explanation of the Drawings

[0024] [Figure 1] It is a perspective view of an excavation work machine according to an embodiment of the present invention. [Figure 2] It is a right side view of an excavation work machine according to an embodiment of the present invention. [Figure 3] This is a schematic plan view illustrating the arrangement of the slewing frame 7 in an excavation machine according to one embodiment of the present invention. [Figure 4] This is a perspective view showing the side engine room portion of the swing frame 7 in an excavation work machine according to one embodiment of the present invention. [Figure 5] This is a perspective view showing the side engine room with its top cover open. [Figure 6] This is a perspective view showing the right exterior cover that encloses the engine room, along with the top cover, in an open state. [Figure 7] This is a perspective view illustrating the support structure of the outer cover that surrounds the side engine room. [Figure 8] This is a plan view illustrating the support structure of the exterior cover that surrounds the side engine compartment. [Figure 9] This is a schematic cross-sectional view illustrating the first link section with the outer cover covering the side engine compartment closed. [Figure 10] This is a schematic cross-sectional view illustrating the state in which the outer cover covering the side engine room is opened by rotating the first link section. [Figure 11] This is a schematic cross-sectional view illustrating the second link section with the outer cover covering the side engine compartment closed. [Figure 12] This is a schematic cross-sectional view illustrating the state in which the upper cover that covers the upper part of the side engine room is opened by rotating the second link section. [Figure 13] This is an enlarged perspective view illustrating the hinge mechanism. [Figure 14] This is an enlarged perspective view illustrating a variation of the hinge mechanism. [Figure 15] This is an enlarged perspective view illustrating other variations of the hinge mechanism. [Modes for carrying out the invention]

[0025] The present invention aims to improve workability during maintenance by improving the support and opening / closing structure of an exterior cover that is installed to be openable and closable for the engine room. Embodiments of the present invention will be described below with reference to the drawings.

[0026] In the embodiments of the present invention, a slewing work vehicle, specifically an excavating work machine (shovel), will be used as an example of the work machine according to the present invention. However, the work machine according to the present invention is not limited to excavating work machines, but can be broadly applied to other construction machinery such as bulldozers, crane work machines, compact track loaders, skid steer loaders, and wheel loaders, or to agricultural machinery such as tractors and combine harvesters.

[0027] The overall configuration of the excavation work machine 1 according to this embodiment will be explained with reference to Figures 1 and 2. In the following, unless otherwise specified, the terms "front side," "rear side," "left and right sides," "planar side," or "upper side," "bottom side," or "lower side" will be used with reference to the position of the operator seated in the driver's seat of the excavation work machine 1.

[0028] As shown in Figures 1 and 2, the excavation work machine 1 comprises a self-propelled vehicle body (machine) 2 and an excavation device 3 and a soil removal device 4, which are attached to the vehicle body 2 as work machines.

[0029] The vehicle body 2 has a pair of left and right crawler-type running sections 5, 5 and a machine frame 6 which serves as a base interposed between the left and right running sections 5, 5.

[0030] The running gear 5 has a configuration in which tracks are wrapped around a sprocket, idler, and multiple rollers supported by the machine frame 6. The running gear 5 has a drive sprocket 5a, which is a drive wheel, at its rear end.

[0031] A soil removal device 4 is attached to the front of the aircraft frame 6. The soil removal device 4 comprises a support frame 40 and a blade 41, which is a soil removal plate, supported by the support frame 40. The soil removal device 4, including these components, is configured to be approximately symmetrical overall.

[0032] The support frame 40 is supported so as to be vertically rotatable relative to the vehicle body 2 and includes left and right arms 43 that extend in the front-rear direction between the left and right running sections 5, 5. The base ends of the left and right arms 43 are supported by support brackets 42 provided on the front of the machine frame 6, with the left-right direction as the axis of rotation. The support frame 40 rotates vertically as the blade cylinder 44 extends and retracts. In other words, as the blade cylinder 44 extends and retracts, the blade 41 rotates vertically via the support frame 40.

[0033] The running vehicle body 2 has a swivel frame 7 that is mounted on the running section 5 so as to be rotatable. The swivel frame 7 is connected to the machine frame 6 via a swivel bearing 8 and is provided so as to be able to swivel in either the left or right direction around an axis in the vertical direction relative to the machine frame 6 by the drive of a swivel motor (not shown).

[0034] An excavation device 3 is attached to the front of the slewing frame 7. The excavation device 3 has a boom 32 that forms the base part, an arm 33 connected to the tip of the boom 32, and a bucket 34 attached to the tip of the arm 33. The excavation device 3 also has a boom cylinder 35 that rotates the boom 32, an arm cylinder 36 that rotates the arm 33, and a bucket cylinder 37 that rotates the bucket 34.

[0035] The base end of the boom 32 is supported by a boom support bracket 31. The boom support bracket 31 is supported by a bracket mounting portion 28 protruding from the slewing frame 7 via a swing axis with the vertical direction as the rotation axis.

[0036] The boom support bracket 31 includes a boom support portion 22 that rotatably supports the base end of the boom 32 with the left-right direction as the axis of rotation, a boom cylinder support portion 23 that supports the lower end of the boom cylinder 35, and a swing cylinder connecting portion 25 that connects the tip of the rod of the swing cylinder 38. The operation of the swing cylinder 38 causes the boom support bracket 31 to rotate around the swing axis, thereby causing the excavation device 3 to rotate from side to side.

[0037] The boom cylinder 35, arm cylinder 36, bucket cylinder 37, and swing cylinder 38 are all hydraulic cylinders operated by pressurized oil discharged by a hydraulic pump (not shown). In the excavation device 3, the bucket 34 is detachably mounted as a work attachment, and other attachments such as a clamping machine (fork) or a crusher (breaker) can be attached in place of the bucket 34 depending on the work to be done.

[0038] The slewing frame 7 is provided with a cabin 10 that houses the driver's compartment from which the operator operates the travel unit 5 and the work equipment, and an engine room 11 that houses the engine 53, battery 54, fuel tank 51 for the engine, and hydraulic oil tank 52 for the hydraulic cylinder.

[0039] The upper part of the engine compartment 11 on the right side of the slewing frame 7 is covered by an upper cover 12. The rear of the engine compartment 11 is covered by a rear cover 13 and a counterweight 9 for balancing the weight with the excavator 3. The right side of the engine compartment 11 of the slewing frame 7 is covered by a right exterior cover 14. The lower right side of the engine compartment 11 is covered by a lower right exterior cover 15. The front of the engine compartment 11 is covered by a right front cover 16. The lower left side of the cabin 10 is covered by a lower left exterior cover 17. The lower front of the cabin 10 is covered by a left front cover 18.

[0040] The cabin 10 is equipped with a driver's seat, and around the driver's seat are a travel lever for moving the travel unit 5, multiple operating pedals for rotating the slewing frame 7 and operating the work equipment, a work operation lever, and an operation panel.

[0041] In the excavation machine 1 having the above configuration, the desired operation and work are performed by an operator seated in the cabin 10 who appropriately operates the travel lever and / or work operation levers. For example, by operating the travel lever, the travel unit 5 moves forward and backward in a straight line or turns left and right, and by operating the work operation lever, excavation work is performed by the excavation device 3, or soil removal work and / or leveling work is performed by the soil removal device 4.

[0042] In the excavation work machine 1 according to this embodiment, the arrangement of the components on the slewing frame 7 will be described with reference to Figure 3. Note that in the plan view shown in Figure 3, the main components arranged on the slewing frame 7 are shown in a simplified manner.

[0043] The swivel frame 7 comprises a base plate 71 and reinforcing members fixed to the base plate 71, namely a right longitudinal rib 72, a left longitudinal rib 73, a front transverse rib 74, and a rear transverse rib 75. Each rib is made of a thick steel plate of a predetermined thickness and is erected on the base plate 71 with the plate thickness direction as the horizontal direction. A bracket mounting portion 28 is fixed to the front end of the base plate 71.

[0044] The substrate 71 has a shape in which the left and right ends and the rear end are formed in a substantially arc shape when viewed from above. The term "substantially arc shape" here includes not only simple arcs, but also shapes in which multiple arcs with different central angles are continuous, as well as shapes that include some straight lines.

[0045] The right longitudinal rib 72 is provided in a straight line extending from front to back on the right side of the substrate 71. That is, in a plan view, the right longitudinal rib 72 extends in the front-to-back direction from the right rear end of the bracket mounting portion 28. The right longitudinal rib 72 is formed such that the front is taller than the rear, and the height gradually decreases towards the rear in the middle section between the rear and front.

[0046] The left longitudinal rib 73 has a rear left longitudinal rib 73a, which is provided parallel to the right longitudinal rib 72 at the left side of the substrate 71, and a front left longitudinal rib 73b, which is provided at an angle so that its front end is slightly to the right. In a plan view, the front left longitudinal rib 73b extends from the left rear end of the bracket mounting portion 28 toward the rear in an oblique direction to the left, and its rear end is connected to the front end of the rear left longitudinal rib 73a.

[0047] The front transverse rib 74 is formed by bending a plate at an angle of approximately 90 degrees in a side view, with its lower end fixed to the substrate 71 and its front-facing end in contact with the rear end of the bracket mounting portion 28. The left end of the front transverse rib 74 is fixed to the side surface of the front left longitudinal rib 73b, and the right end is fixed to the side surface of the right longitudinal rib 72.

[0048] The rear transverse rib 75 is located at the rear side of the substrate 71, with its left end fixed to the side of the rear left longitudinal rib 73a and its right end fixed to the side of the right longitudinal rib 72.

[0049] The engine room 11 is located on the slewing frame 7, extending from the right side to the rear of the cabin 10. The area below the driver's seat on the rear side of the cabin 10, located on the left front of the slewing frame 7, is also part of the engine room 11. In addition, in the left-right direction of the slewing frame 7, a space is provided between the cabin 10 and the engine room 11 that allows the boom 32 of the excavation device 3, which is attached to the bracket mounting section 28, to move forward and backward.

[0050] The engine room 11 is formed as a space with the base plate 71 of the slewing frame 7 as the floor, the right side covered by the right exterior cover 14, the top covered by the top cover 12, and the rear covered by the rear cover 13. Of the engine room 11, the right side engine room 11a of the slewing frame 7 houses the fuel tank 51, hydraulic oil tank 52, battery 54, and heat exchange unit 60. The rear engine room 11b of the slewing frame 7 houses the engine 53 and cooling fan 66.

[0051] Engine 53 is a diesel engine that receives fuel from the fuel tank 51 and is mounted transversely in the rear engine compartment 11b. Combustion gases generated in the combustion chamber of engine 53 are discharged outside the engine compartment 11 via an exhaust system and muffler (not shown).

[0052] The heat exchange unit 60 and cooling fan 66 are located to the right of the engine 53 and behind the side engine compartment 11a. The engine 53, cooling fan 66, and heat exchange unit 60 are arranged in this order from the inside of the engine compartment 11 toward the right side on the slewing frame 7. That is, the heat exchange unit 60 is located on the air intake side of the cooling fan 66, and the engine 53 is located on the air discharge side of the cooling fan 66.

[0053] The battery 54, which stores the power supplied to the electrical equipment mounted on the excavating machine 1, is located to the right of the heat exchange unit 60 in the side engine compartment 11a and is fixed to the circuit board 71.

[0054] Furthermore, above the battery 54 and to the right of the heat exchange unit 60, an air cleaner 55 is located for purifying the air supplied to the engine 53. The air cleaner 55 and the engine 53 are connected via an air intake pipe (not shown).

[0055] The heat exchange unit 60 consists of a radiator 61, an oil cooler 62, and a condenser 63.

[0056] The radiator 61 is a heat exchanger for cooling engine coolant and includes a flow passage through which coolant flows and a heat dissipation section. The radiator 61 is connected to a reserve tank 64 that stores coolant that temporarily overflows from the flow passage within the radiator 61. The oil cooler 62 is a heat exchanger for cooling the hydraulic fluid that operates hydraulic cylinders and the like and includes a flow passage through which hydraulic fluid flows and a heat dissipation section. The oil cooler 62 cools the hydraulic fluid returning to the hydraulic fluid tank 52 by dissipating the heat from the return oil from each hydraulic cylinder in the heat dissipation section. The condenser 63 is a heat exchanger for cooling the high-pressure refrigerant of an air conditioning system (not shown) that harmonizes the air inside the cabin 10 and is connected to a compressor (not shown).

[0057] The radiator 61 and the oil cooler 62 are arranged in a row in approximately the front-to-back direction. The condenser 63 is located to the right of the radiator 61 and the oil cooler 62, and is positioned opposite the radiator 61 and the oil cooler 62.

[0058] The cooling fan 66 is positioned facing the heat exchange unit 60 and supplies cooling air to the heat exchanger that constitutes the heat exchange unit 60. The cooling fan 66 is an axial-flow fan and rotates in conjunction with the rotation of the crankshaft, for example, by being connected to one end of the crankshaft of the engine 53.

[0059] The right exterior cover 14 is provided with several vents (not shown), and by rotating the cooling fan 66, cooling outside air is drawn into the engine room 11 through these vents. In other words, the rotation of the cooling fan 66 causes air to flow from right to left inside the engine room 11.

[0060] The exterior cover that covers the side engine compartment 11a of the slewing frame 7 will be explained with reference to Figures 4 to 6. In these figures, only the right-side portion of the slewing frame 7 is shown, and the equipment and other items located in the side engine compartment 11a are not shown.

[0061] As explained with reference to Figure 3, the side engine compartment 11a houses a fuel tank 51, a hydraulic oil tank 52, a battery 54, and a heat exchange unit 60, among other things. Of the exterior covers that cover these components, the top cover 12 is designed to be opened and closed independently (see Figure 5), while the right exterior cover 14 is designed to be opened and closed together with the top cover 12 (see Figure 6).

[0062] The top cover 12 has a roughly rectangular shape in plan view, with its right edge being an arc shape that follows the outer shape of the slewing frame 7 and its left edge being a straight line. The left edge of the top cover 12 is rotatably supported by a hinge mechanism 140, which will be described later. The right exterior cover 14 has a roughly rectangular shape in side view and an arc shape that follows the outer shape of the slewing frame 7 in plan view. The upper edge of the right exterior cover 14 is formed to fit into the right edge of the top cover 12. That is, the right edge, which is one end edge of the top cover 12, is supported by the right exterior cover 14, which is a side cover that covers the engine room 11. In addition, the lower edge of the right exterior cover 14 is formed to fit into the lower right exterior cover 15 and is configured to be able to move toward and away from the lower right exterior cover 15.

[0063] A locking mechanism 80a for the right exterior cover is provided between the lower edge of the right exterior cover 14 and the upper edge of the lower right exterior cover 15. The locking mechanism 80a for the right exterior cover secures the right exterior cover 14 to the lower right exterior cover 15. Furthermore, a locking mechanism 80b for the top cover is provided between the upper edge of the right exterior cover 14 and the right edge of the top cover 12. The locking mechanism 80b for the top cover secures the top cover 12 to the lower right exterior cover 15. The locking mechanism 80a for the right exterior cover and the locking mechanism 80b for the top cover are similar, and hereinafter, they will be collectively referred to as locking mechanism 80.

[0064] The locking mechanism 80 consists of a locking device 81 having a keyhole 82 and an engaging device 83 having a handle 84. The locking device 81 is, for example, a cylinder lock type, and by inserting a key into the keyhole 82 and rotating it, the locking member connected to the cylinder lock engages with and disengages from the locking member, thereby switching between a locked state and an unlocked state. The engaging device 83 engages with and disengages from the locking member by operating the handle 84. In the case of the locking mechanism 80a for the right exterior cover, the locking member is provided on the right lower exterior cover 15 side. In the case of the locking mechanism 80b for the top cover, the locking member is provided on the right exterior cover 14 side. With this locking mechanism 80, when the locking device 81 is in the unlocked state, the desired exterior cover can be opened by operating the handle 84. The handle 84 may be a flap-type handle 84a, as in the locking mechanism 80a for the right exterior cover, or a lever-type handle 84b, as in the locking mechanism 80b for the top cover.

[0065] A maintenance technician can separate the right exterior cover 14 from the lower right exterior cover 15 by unlocking the locking device 81 of the locking mechanism 80a for the right exterior cover and operating the handle 84a on the right exterior cover 14 side, and then open the right exterior cover 14 and the top cover 12 together by a rotational movement with the left edge of the top cover 12 as the pivot point. Alternatively, a maintenance technician can separate the top cover 12 from the right exterior cover 14 and open only the top cover 12 by unlocking the locking device 81 of the locking mechanism 80b for the top cover and operating the handle 84b on the top cover 12 side.

[0066] The support structure and opening / closing structure of the exterior cover that covers the right-side engine compartment 11a of the slewing frame 7 will be explained with reference to Figures 7 to 13. Figures 7 and 8 show the side engine compartment 11a with the top cover 12, right exterior cover 14, and right front cover 16 removed. Figure 9 is a cross-sectional view AA in Figure 8, and Figure 10 shows the state in which the top cover 12 and right exterior cover 14 are opened by rotating the first link section 101 from the state in Figure 9. Figure 11 is a cross-sectional view BB in Figure 8, and Figure 12 shows the state in which only the top cover 12 is opened by rotating the second link section 102 from the state in Figure 11. In Figures 9 to 12, the top cover 12 and right exterior cover 14 are shown by dashed lines. Figure 13 is an enlarged perspective view illustrating the hinge mechanism. Note that, for the sake of explanation, the internal structure of the side engine compartment 11a is not shown in these figures.

[0067] The side engine compartment 11a is provided with a first frame section 91 and a second frame section 92 that connects the first frame section 91 and the right exterior cover 14, as a frame that supports the right exterior cover 14 and the top cover 12.

[0068] The first frame section 91 is a beam section that is provided along the front-rear direction of the slewing frame 7 in a plan view and supports the structure that surrounds the upper part of the side engine room 11a. The first frame section 91 is made of a long steel material with a roughly C-shaped cross-section in the front-rear direction. The front side of the first frame section 91 is bent at an obtuse angle downwards and attached to the right longitudinal rib 72. The rear side of the first frame section 91 is supported by a main support column 93. The lower end of the main support column 93 is fixed to the upper rear edge of the right longitudinal rib 72. The first frame section 91 is provided such that the height of the front is lower than the height of the rear, and the height gradually decreases as it moves forward. In this embodiment, the front end of the first frame section 91 and the lower end of the main support column 93 are fixed to the right longitudinal rib 72, but they may be fixed directly to the base plate 71.

[0069] The first frame section 91 is supported on its right side by an auxiliary support column 94. The auxiliary support column 94 is formed by bending a rod at an angle of approximately 90 degrees. One end of the auxiliary support column 94 is fixed to the side surface of the first frame section 91, and the other end is fixed to the base plate 71 by screw fastening.

[0070] Within the frame enclosed by the main support column 93 and the auxiliary support column 94, a partition plate 95 is provided in the side engine room 11a, which divides the area where tanks are arranged from the area where equipment such as the heat exchange unit 60 and batteries are arranged. The auxiliary support column 94 and the partition plate 95 also function as support members for supporting the air cleaner 55 at a predetermined height, or as holding members for holding cables connecting the battery 54 to the equipment. The partition plate 95 does not have to cover the entire area within the frame enclosed by the main support column 93 and the auxiliary support column 94, but may partially cover it with openings at the bottom or top.

[0071] The upper part of the first frame section 91 is a flat surface, and a pair of hinge mechanisms 140, which will be described later, are provided on this flat surface at predetermined intervals.

[0072] A tank mounting section 96 for attaching a hydraulic oil tank 52 is provided on the lower side of the first frame section 91. The tank mounting section 96 is a so-called L-shaped bracket and has a tank connecting section 98 made of a plate surface and provided parallel to the base plate 71, and a frame connecting section 99 made of a plate surface and provided perpendicular to the base plate 71. The tank connecting section 98 is connected to the upper part of the hydraulic oil tank 52 by screw fastening, and the frame connecting section 99 is fixed to the first frame section 91 by welding or screw fastening. The hydraulic oil tank 52 is fixed to the first frame section 91 via the tank mounting section 96 configured in this way. The hydraulic oil tank 52 is made of sheet metal, and its bottom is fixed to the base plate 71. Since the upper part of a liquid storage tank such as the hydraulic oil tank 52 placed on the base plate 71 can be fixed to the first frame section 91, the stability when arranging a liquid storage tank on the slewing frame 7 can be improved. Furthermore, by providing a tank mounting portion 96 at an intermediate position in the front-rear direction of the first frame portion 91, the first frame portion 91 is connected to the base plate 71 via the hydraulic oil tank 52. Since the first frame portion 91 is supported from below by the hydraulic oil tank 52 and the tank mounting portion 96, the rigidity of the first frame portion 91 can be increased.

[0073] The second frame section 92 has a first link section 101 located on the rear side and a second link section 102 located on the front side. The first link section 101 and the second link section 102 are provided extending to the right from the first frame section 91 and connect the right exterior cover 14 to the first frame section 91. That is, in a plan view, if the extension direction of the first frame section 91 is the vertical direction and the extension direction of the first link section 101 and the second link section 102 of the second frame section 92 is the horizontal direction, then the first frame section 91 and the second frame section 92 are in a substantially orthogonal positional relationship. The left ends (base ends) of the first link section 101 and the second link section 102 are connected to the first frame section 91 via a hinge mechanism 140. The left ends of the first link section 101 and the second link section 102 are pivotally supported on each of a pair of hinge mechanisms 140 provided spaced apart on the first frame section 91.

[0074] The first link section 101 is formed of sheet metal with the top and bottom being the thickness direction and the front and back being the width direction. The first link section 101 includes a horizontal section 103, an inclined section 104, and a connecting section 105. In the first link section 101, the connecting section 105, which is provided at an angle of approximately 90 degrees to the horizontal section 103, is connected to the right end side of the horizontal section 103 via the inclined section 104, thereby facilitating connection to the inner wall of the right exterior cover 14.

[0075] Furthermore, the connecting portion 105 is provided with a mounting portion 88 for attaching the first link portion 101 to the right exterior cover 14. The mounting portion 88 is fixed to the connecting portion 105 by screw fastening. The first link portion 101 is attached to a bracket protruding from the inner wall of the right exterior cover 14 via the mounting portion 88. In addition, the left end of the first link portion 101 (the left end of the horizontal portion 103), which is the base end, is provided with a cylindrical boss portion 106 through which the first pivot 141 (see Figure 13) of the hinge mechanism 140 is inserted.

[0076] A gas spring 111 and a stay plate 114 are provided on the lower side of the first link portion 101.

[0077] The gas spring 111 is provided with its left-right direction of expansion and contraction. The gas spring 111 is a biasing part that biases the rotation of the first link section 101, and expands and contracts by moving the rod 113 relative to the cylinder 112 using the reaction force of the high-pressure gas sealed inside the cylinder 112. The left end of the gas spring 111, which is on the rod side, is supported by a rod-side bracket 97 that protrudes from below the first frame section 91 so as to be rotatable around the shaft 119a. The left end of the gas spring 111, which is on the cylinder side, is supported by a cylinder-side bracket 107 that protrudes downward from the lower surface of the horizontal section of the first link section 101 so as to be rotatable around the shaft 119b. The gas spring 111 expands when the right outer cover 14 is rotated in the opening direction together with the top cover 12, and contracts when it is rotated in the closing direction. Alternatively, an oil cylinder with a viscous liquid such as silicone oil sealed inside may be used instead of the gas spring 111.

[0078] The stay plate 114 is a first holding part that maintains the rotation angle of the first link portion 101 at a predetermined angle. When the right exterior cover 14 is opened together with the top cover 12, the stay plate 114 supports the top cover 12 and the right exterior cover 14, and also maintains the extended state of the gas spring 111. The stay plate 114 is arranged along the extension and contraction direction of the gas spring 111, with the front-rear direction being the plate thickness direction. On the right side of the stay plate 114, there is an elongated hole 115 into which a pin 108 provided on the cylinder-side bracket 107 is slidably inserted. The length of the elongated hole 115 corresponds to the extension and contraction length of the rod 113 of the gas spring 111. The right end of the elongated hole 115 is bent in a roughly V-shape, forming a fitting portion 116 into which the pin 108 is fitted. The left end of the stay plate 114 is supported by the rod-side bracket 97 so as to be rotatable around the axis 119b, similar to the gas spring 111. When the right exterior cover 14 is closed, the upper right end of the stay plate 114 protrudes upward from the elongated hole 109 provided in the inclined portion 104 of the first link portion 101.

[0079] When the right exterior cover 14 is rotated in the opening direction together with the top cover 12, both the gas spring 111 and the stay plate 114 are tilted at a predetermined angle (for example, 45 to 85 degrees) from a horizontal position, with the axis 119b of the rod-side bracket 97 as the pivot point. At this time, the pin 108 of the extended gas spring 111 fits into the fitting portion 116 of the stay plate 114, and the load of the right exterior cover 14 and the top cover 12 is supported by the stay plate 114. The stay plate 114 restricts the contraction of the gas spring 111 due to the weight of the right exterior cover 14 and the top cover 12, and the open state of the side engine compartment 11a is maintained.

[0080] The second link section 102 is formed of sheet metal with the top and bottom being the thickness direction and the front and back being the width direction. Like the first link section 101, the second link section 102 includes a horizontal section 123, an inclined section 124, and a connecting section 125. On the other hand, unlike the first link section 101, the horizontal section 123 has a shape that curves forward in a plan view. As shown in Figure 8, a fuel tank 51 is provided below the second link section 102. Therefore, in order to secure working space above the fuel tank 51 for the fuel filler port 51a and the tank liquid level gauge mounting section 51b, the horizontal section 123 of the second link section 102 is bent.

[0081] Furthermore, the connecting portion 125 is provided with a mounting portion 89 for attaching the second link portion 102 to the right exterior cover 14. The mounting portion 89 is fixed to the connecting portion 125 by screw fastening. The second link portion 102 is attached via the mounting portion 89 to a bracket that protrudes from the inner wall of the right exterior cover 14 by welding or the like. The left end of the second link portion 102 (the left end of the horizontal portion 123) is provided with a cylindrical boss portion 126 through which the second pivot 151 (see Figure 13) of the hinge mechanism 140 is inserted.

[0082] A guide portion 134 is provided on the upper surface of the horizontal portion 123, with an elongated hole 135 formed therein, which is oriented with the front-to-back direction as the plate thickness direction and is elongated in the left-to-right direction. The guide portion 134 guides the stay 131 when opening and closing the top cover. The stay 131 is for maintaining the open state when the top cover 12 is rotated in the opening direction. The stay 131 is made of a round bar, and one end of the stay 131 is bent forward at an angle of approximately 90 degrees, and its tip is rotatably connected to a bracket 137 provided on the back surface of the top cover 12. The other end of the stay 131 is also bent forward at an angle of approximately 90 degrees, and its tip is slidably inserted into the elongated hole 135 of the guide portion 134. The left end of the elongated hole 135 is bent in an approximately inverted V shape, forming a fitting portion 136 into which the tip 132 of the stay 131 is fitted. When the top cover 12 is rotated in the opening direction by a predetermined angle (for example, 45 to 85 degrees), the right tip of the stay 131 fits into the fitting portion 136, thereby supporting the load of the top cover 12 with the stay 131 and maintaining the open state. The guide portion 134 and the stay 131 are a second holding portion that maintains the rotation angle of the top cover 12 at a predetermined angle.

[0083] When closing the open top cover 12, the maintenance worker manually releases the engagement between one end of the stay 131 and the fitting portion 136. The first frame portion 91 is lower in height at the front than at the rear, and the second link portion 102 is positioned lower than the first link portion 101. The guide portion 134 and the stay 131, which serve as the second holding portion, are positioned on the upper surface of the horizontal portion of the second link portion 102, but are positioned lower than the first link portion 101. In other words, in the case of an excavating machine with a machine mass of about 5 to 11 tons, as in this embodiment, the second holding portion can be positioned at a height that does not require the maintenance worker to stand on some kind of platform or track to work on it. This makes it easier for the maintenance worker to access the stay 131.

[0084] Next, the hinge mechanism 140 will be described. The hinge mechanism for the first link and the hinge mechanism for the second link are the same. Here, the hinge mechanism 140 for the first link will be used as an example.

[0085] As shown in Figure 13, the hinge mechanism 140 includes a first hinge portion 142 that rotatably supports the first link portion 101 with respect to the first frame portion 91, and a second hinge portion 152 that rotatably supports the upper cover 12 with respect to the first frame portion 91.

[0086] The first hinge portion 142 has a fixed plate portion 143 attached to the first frame portion 91 and a shaft support portion 144 that supports the first pivot 141. The fixed plate portion 143 has a substantially rectangular shape in plan view and has holes for inserting bolts 145 at two locations symmetrically in the front-rear direction. The bolts 145 inserted through the holes are fastened with nuts 146 to fix the fixed plate portion 143 to the upper surface of the first frame portion 91. The shaft support portion 144 supports both ends of the first pivot 141 along the length of the longer side of the rectangle of the fixed plate portion 143 and has holes through which the first pivot 141 is inserted. Two shaft support portions 144 are provided on the right side of the fixed plate portion 143, facing each other in the front-rear direction. The front and rear shaft support portions 144 are fixed to the fixed plate portion 143 by welding or the like.

[0087] Furthermore, a restricting portion 147 is provided between the front and rear shaft support portions 144, at a distance from one of the shaft support portions 144 corresponding to the width of the first link portion 101, to restrict the axial movement of the first link portion 101. The restricting portion 147 has the same shape as the front and rear shaft support portions 144. The first pivot 141 is supported by the front and rear shaft support portions 144 and the restricting portion 147, with the direction of rotation being approximately the front-rear direction. Retaining members 148 are attached to both ends of the first pivot 141, which protrudes from the front and rear shaft support portions 144 by passing through the boss portion 106 of the first link portion 101. As a result, the first link portion 101 is connected to the first frame portion 91 via the first pivot 141.

[0088] The second hinge portion 152 has a cover mounting portion 153 for attaching the top cover 12 and a shaft support portion 154 for supporting the second pivot 151. The cover mounting portion 153 has a substantially rectangular shape in plan view and has a cylindrical boss portion 155 at its left end, which is the base end, through which the second pivot 151 is inserted. The cover mounting portion 153 also has holes for inserting bolts 156 at positions symmetrically in the front-rear direction on the left end. The bolts 156 inserted through the holes are fastened with nuts 157 via connecting portions (not shown) on the back surface of the top cover 12. The shaft support portion 154 has holes through which the second pivot 151 is inserted and is provided at two positions on the upper surface of the horizontal portion 103 adjacent to the boss portion 106 of the first link portion 101, spaced apart in the front-rear direction by a distance equivalent to the width of the cover mounting portion 153. The second pivot 151 is supported by front and rear pivot support sections 154 with its rotation axis approximately in the front-rear direction. The cover mounting section 152 is connected to the first link section 101 via the second pivot 151. When the first link section 101 and the second link section 102 rotate, the cover mounting section 153 also rotates around the second pivot 151.

[0089] With this hinge mechanism 140, the right exterior cover 14 can rotate around the first pivot 141 together with the first link portion 101 and the second link portion 102. When the right exterior cover 14 rotates upward, the top cover 12 is pushed up, and both the right exterior cover 14 and the top cover 12 open. This opens up a large portion of the upper and left side of the side engine compartment 11a. The top cover 12 can rotate around the second pivot 151 together with the cover mounting portion 153. The top cover 12 rotates upward and opens on its own. This opens up only the upper part of the side engine compartment 11a.

[0090] The excavation work machine 1 of this embodiment, having the configuration described above, can be said to have the following configuration. That is, the excavation work machine 1 comprises a vehicle frame (slewing frame 7), an engine room 11 provided on the vehicle frame (slewing frame 7) and housing the prime mover and equipment, and a plurality of exterior covers covering the engine room 11, and comprises a first frame portion 91 provided along the front-rear direction (longitudinal direction) of the vehicle frame (slewing frame 7) in a plan view, and a second frame portion 92 provided laterally from the first frame portion 91, with its base end connected to the first frame portion 91 and its other end connected to a side cover (right exterior cover 14) that covers the side of the engine room 11 among the exterior covers.

[0091] According to the excavation machine 1 of this embodiment, which has the above configuration, a structural frame having a first frame section 91 and a second frame section 92 is provided in the engine room 11. As a result, the right exterior cover 14 is supported by the first frame section 91 and the second frame section 92, and the top cover 12 is supported by the first frame section 91. Therefore, even if the top cover 12 is not permanently attached to the right exterior cover 14, each exterior cover is independently supported by the structural frame. Consequently, maintenance technicians can choose to open only the top cover 12 from among the multiple exterior covers, or open both the top cover 12 and the right exterior cover 14, depending on the arrangement of equipment in the engine room 11 and the nature of the maintenance work. For example, when a user of the excavation machine 1 refuels the fuel tank, the exterior cover (top cover 12) can be opened to the minimum necessary width limited to the top surface where the fuel filler is located. This reduces the intrusion of foreign objects into the engine room. Furthermore, when maintenance technicians inspect equipment or replace parts, they can open the outer covers (right outer cover 14 and top cover 12) to their maximum extent. This improves work efficiency during maintenance.

[0092] Furthermore, in the excavation work machine 1 according to the above embodiment, the second frame portion is rotatably supported by the first frame portion via the first hinge portion. Also, the top cover 12 is rotatably supported by the first frame portion 91 via the second hinge portion.

[0093] With the excavation work machine 1 according to this embodiment, which has the above configuration, the base end (left end) of the second frame section 92 rotates by the hinge mechanism 140, making it possible for maintenance technicians to easily open and close the right exterior cover 14 and the top cover 12 simultaneously.

[0094] Furthermore, in the excavation work machine 1 according to the above embodiment, the first hinge portion has a first pivot that pivotally supports the base end of the second frame portion, and the second hinge portion has a cover mounting portion that connects the upper cover and a second pivot that pivotally supports the cover mounting portion.

[0095] According to the excavation work machine 1 of this embodiment, which has the above configuration, the base end of the second frame portion 92 and the cover mounting portion 153 are pivotally supported by separate pivots, thereby enabling the integrated opening and closing of the right exterior cover 14 and the top cover 12 by simultaneously rotating the second frame portion 92 and the cover mounting portion 153, and the opening and closing of only the top cover 12 by rotating only the cover mounting portion 153. In this way, by providing an opening and closing structure for the exterior cover covering the side engine room 11a that allows for the opening and closing of only the top cover, and the opening and closing of the top cover and the right side cover as a single unit, the workability during maintenance can be improved.

[0096] Furthermore, in the excavation work machine 1 according to the above embodiment, the second hinge portion is provided on the upper part of the second frame portion, so that the first hinge portion and the second hinge portion are aligned vertically with respect to the first frame portion 91. As a result, the first pivot 141 and the second pivot 151 are provided parallel to each other in the vertical direction.

[0097] According to the excavation work machine 1 of this embodiment, which has the above configuration, the hinge mechanism 140, which includes two axes, a first pivot 141 that rotatably supports the right outer cover 14 and a second pivot 151 that rotatably supports the upper cover 12, can be configured compactly.

[0098] A modified version of the hinge mechanism will now be described. Figure 14 is an explanatory diagram of the hinge mechanism 160 according to Modification 1. Components similar to those in the hinge mechanism 140 described with reference to Figure 13 are given the same reference numerals, and detailed explanations are omitted. Also, as with the hinge mechanism 140, the hinge mechanism for the first link and the hinge mechanism for the second link are the same, so the hinge mechanism 160 for the first link will be used as an example for explanation.

[0099] The hinge mechanism 160 according to Modification 1 differs from the hinge mechanism 140 described earlier in that the pivot supporting the first link portion 101 of the first hinge portion 142 and the pivot supporting the cover mounting portion 173 of the second hinge portion 172 are configured as a single pivot 161.

[0100] Furthermore, a pair of arms 165 are formed on the left end of the first link portion 101, and a cylindrical boss portion 166 having a hole for inserting the pivot 161 is provided at the tip of each arm portion 165. The left end of the second link portion 102 is similarly modified.

[0101] The cover mounting portion 173 of the second hinge portion 172 to which the top cover 12 is attached has a substantially L-shaped cross-section, and a cylindrical boss portion 175 having a hole through which the pivot 161 is inserted is provided at its downward end. The boss portion 175 of the cover mounting portion 173 is positioned between a pair of boss portions 166 of the first link portion 101. As a result, the first link portion 101 and the cover mounting portion 173 are connected to the first frame portion 91 via a common pivot 161. When the first link portion 101 and the second link portion 102 rotate, the cover mounting portion 173 also rotates around the pivot 161.

[0102] The right exterior cover 14 is rotatable around the pivot 161 together with the first link section 101 and the second link section 102. When the right exterior cover 14 rotates upward, the top cover 12 is pushed up, and both the right exterior cover 14 and the top cover 12 open. This opens up a large portion of the upper and left side of the side engine compartment 11a. The top cover 12 is rotatable around the pivot 161 together with the cover mounting section 173, and only the top cover 12 rotates upward to open. This opens up only the upper part of the side engine compartment 11a.

[0103] In the excavation machine 1 according to the modified example 1 described above, the shape of the left end of the first link portion 101 and the shape of the left end of the cover mounting portion 173 are modified so that the cover mounting portion 173 is located above the first link portion 101, and the first hinge portion 142 and the second hinge portion 172 are arranged vertically in alignment. This makes the hinge mechanism 160 compact. Furthermore, by configuring the first and second pivots with a single pivot 161, the configuration of the hinge mechanism is simplified, and the efficiency of assembly work can be improved.

[0104] Other variations of the hinge mechanism will now be described. Figure 15 is an explanatory diagram of the hinge mechanism 180 according to variation 2. Components similar to those described with reference to Figure 13 for the hinge mechanism 140 and the hinge mechanism 160 according to variation 2 are given the same reference numerals, and detailed explanations are omitted. Also, as with the hinge mechanism 140, the hinge mechanism for the first link and the hinge mechanism for the second link are the same, so the hinge mechanism 180 for the first link will be used as an example for explanation.

[0105] In the hinge mechanism 180 according to Modification 2, similar to Modification 1, the pivot supporting the first link portion 101 of the first hinge portion 182 and the pivot supporting the cover mounting portion 173 of the second hinge portion 172 are configured as a single pivot 181. Furthermore, it differs from Modification 1 in that the boss portion 106 of the first link portion 101 and the boss portion 175 of the cover mounting portion 173 are arranged in parallel in the front-rear direction with respect to the pivot whose rotation axis direction is approximately in the front-rear direction. Therefore, the fixing plate portion 183 to which the shaft support portion 144 is fixed and the pivot 181 have a longer length in the front-rear direction than those of Modification 1.

[0106] The right exterior cover 14 is rotatable around the pivot 181 together with the first link section 101 and the second link section 102. When the right exterior cover 14 rotates upward, the top cover 12 is pushed up, and both the right exterior cover 14 and the top cover 12 open. This opens up a large portion of the upper and left side of the side engine compartment 11a. The top cover 12 is rotatable around the pivot 181 together with the cover mounting section 173, and only the top cover 12 rotates upward to open. This opens up only the upper part of the side engine compartment 11a.

[0107] In the hinge mechanism 160 according to Modification 1 and the hinge mechanism 180 according to Modification 2 described above, a single pivot 161 and 181 were used, respectively, but the invention is not limited to this. That is, the pivot supporting the first link portion 101 and the pivot supporting the cover mounting portion 173 may be separate components and arranged on the same axis.

[0108] The above-described embodiments and modifications are examples of the present invention, and the work machines according to the present invention are not limited to the above-described embodiments. Therefore, even in embodiments other than those described above, various modifications are possible depending on the design, etc., as long as they do not depart from the technical idea of ​​the present invention. Furthermore, the effects described in this disclosure are merely examples and are not limiting, and other effects may also exist.

[0109] Furthermore, the present invention can take the following forms. (Note 1) The vehicle frame and An engine room, which is provided on the vehicle body frame and houses the prime mover and equipment, Multiple exterior covers covering the engine room, Equipped with, A first frame portion provided along the front-rear direction of the vehicle body frame in a plan view, The base end is connected to the first frame portion and the other end is connected to the side of the engine room within the exterior cover. The second frame section is connected to the side cover that encloses it, A work machine characterized by being equipped with the following features. (Note 2) The second frame portion is rotatably supported by the first frame portion via the first hinge portion. It is being The work machines described in (Note 1). (Note 3) Of the aforementioned multiple exterior covers, the upper cover that covers the upper surface of the engine room is connected via a second hinge portion. The first frame portion is supported so as to be rotatable, The work machines described in (Appendix 2). (Note 4) A first hinge portion having a first pivot that pivotally supports the base end of the second frame portion, A cover mounting portion that connects the upper cover, and a second pivot that pivotally supports the cover mounting portion, A second hinge portion having, A work machine as described in (Appendix 3) that includes the following: (Note 5) The first pivot is provided on the first frame portion, The second pivot is provided on the base end side of the second frame portion, The work machines described in (Appendix 4). (Note 6) The first pivot and the second pivot are provided on the first frame portion. The work machines described in (Appendix 4). (Note 7) The first pivot and the second pivot are located on the same axis. The work machines described in (Appendix 6). (Note 8) The second frame portion has a first retaining mechanism that maintains the rotation angle of the second frame portion at a predetermined angle. Having a share, A work machine as described in any of (Appendix 2) to (Appendix 7). (Note 9) The second frame portion is a second holding portion that holds the rotation angle of the upper cover at a predetermined angle. Having, A work machine as described in any of (Appendix 3) to (Appendix 7). (Note 10) The second frame portion has a biasing portion that biases the rotation of the second frame portion. A work machine as described in any of (Appendix 2) to (Appendix 9). (Note 11) The second frame portion is arranged spaced apart from the first frame portion. It has a link portion and a second link portion, and each of the first link portion and the second link portion The first frame portion and the side cover are connected. A work machine as described in any of the notes (1) through (10). (Note 12) The first frame section is connected to the vehicle body frame via a support column. A work machine as described in any of (Appendix 1) to (Appendix 11). (Note 13) The aforementioned support column has a first support column and a second support column, The first support column has a linear shape and supports the first frame section from below. The second support column has a bent shape and supports the first frame from the side. The work machines described in (Appendix 12). (Note 14) A partition is provided between the first support column and the second support column to divide the space in the engine room. It is being kicked. (Appendix 13) The work machines described therein. (Note 15) The first frame portion is formed by bending one end and connecting that end to the vehicle body frame. The other end is connected to the vehicle frame via the first support column. The work machines described in (Appendix 13) or (Appendix 14). (Note 16) The engine room is equipped with a storage tank capable of storing liquids. The first frame portion has a mounting portion for attaching the storage tank, A work machine as described in any of (Appendix 1) to (Appendix 15). (Note 17) A work machine comprising a slewing frame, a cabin located on the upper left side of the slewing frame, and an engine room located on the upper right side of the slewing frame, The engine room comprises a right exterior cover that covers the right side of the engine room and a top cover that covers the top of the engine room. The upper cover is provided above the right outer cover so as to be rotatable with the left edge of the upper cover as the pivot point. The aforementioned right exterior cover is provided so as to be rotatable together with the upper cover, with the left edge of the upper cover as the pivot point, in a working machine. (Note 18) The engine room comprises a first frame portion provided along the front-rear direction on the cabin side, and a second frame portion whose base end is rotatably supported by the first frame portion. The tip of the second frame portion is attached to the inner wall of the right exterior cover. The work machines described in (Appendix 17). (Note 19) The aforementioned top cover is rotatably mounted on the upper part of the second frame portion. The work machines described in (Appendix 18). [Explanation of Symbols]

[0110] 1. Excavation equipment (working machinery) 2. Running vehicle 5. Running section 7. Swivel frame (vehicle frame) 11. Engine Room 12 Top cover 14. Right exterior cover (side cover) 15. Lower right exterior cover 51 Fuel tank 52 Hydraulic oil tank 53 Engine (prime mover) 60 Heat exchange unit (heat exchanger) 71 circuit boards 72 Right vertical rib 80 Locking mechanism 91 First frame section 92 Second Frame Section 93 Main pillar (1st pillar) 94 Auxiliary pillar (second pillar) 95 Partition plate (compartment section) 96 Tank mounting section 101 First Link Section 102 Second Link Section 111 Gas spring (biasing part) 114 Stay plate (first retaining part) 131 Stay (Second retaining part) 140 Hinge Mechanism 160 Hinge Mechanism 180 Hinge Mechanism 142 First hinge section 152 Second hinge section 172 Second hinge section 182 First hinge section

Claims

1. The vehicle frame and An engine room, which is provided on the vehicle body frame and houses the prime mover and equipment, Multiple exterior covers covering the engine room, Equipped with, A first frame portion provided along the front-rear direction of the vehicle body frame in a plan view, A second frame portion, the base end of which is connected to the first frame portion and the other end of which is connected to the side cover of the exterior cover that covers the side of the engine room, Equipped with, The second frame portion is rotatably supported by the first frame portion, Of the aforementioned multiple exterior covers, the upper cover that covers the upper surface of the engine room is rotatably supported on the first frame portion. A work machine characterized by the following features.

2. A first hinge portion having a first pivot that pivotally supports the base end of the second frame portion, A cover mounting portion that connects the upper cover, and a second pivot that pivotally supports the cover mounting portion, A second hinge portion having, The work machine according to claim 1, comprising:

3. The first pivot is provided on the first frame portion, The second pivot is provided on the base end side of the second frame portion. The working machine according to claim 2.

4. The first pivot and the second pivot are provided on the first frame portion. The working machine according to claim 2.

5. The first pivot and the second pivot are located on the same axis. The work machine according to claim 4.

6. The second frame portion has a first holding portion that holds the rotation angle of the second frame portion at a predetermined angle. The work machine according to claim 1.

7. The second frame portion has a second holding portion that holds the rotation angle of the upper cover at a predetermined angle. The work machine according to claim 1.

8. The second frame portion has a biasing portion that biases the rotation of the second frame portion. The work machine according to claim 1.

9. The second frame portion has a first link portion and a second link portion arranged spaced apart from the first frame portion, and each of the first link portion and the second link portion connects the first frame portion and the side cover. The work machine according to claim 1.

10. The first frame section is connected to the vehicle body frame via a support column. The work machine according to claim 1.

11. The support column comprises a first support column and a second support column, The first support column has a linear shape and supports the first frame section from below. The second support column has a bent shape and supports the first frame from the side. The work machine according to claim 10.

12. A partition is provided between the first support and the second support to divide the space in the engine room. The work machine according to claim 11.

13. The first frame portion is formed by bending one end, and this end is connected to the vehicle body frame, while the other end is connected to the vehicle body frame via the first support column. The working machine according to claim 12.

14. The engine room is equipped with a storage tank capable of storing liquids. The first frame portion has a mounting portion for attaching the storage tank, A working machine according to any one of claims 1 to 13.

15. A work machine comprising a slewing frame, a cabin located on the upper left side of the slewing frame, and an engine room located on the upper right side of the slewing frame, The engine room comprises a right exterior cover that covers the right side of the engine room and a top cover that covers the top of the engine room. The upper cover is provided above the right outer cover so as to be rotatable with the left edge of the upper cover as the pivot point. The aforementioned right exterior cover is provided so as to be rotatable together with the upper cover, with the left edge of the upper cover as the pivot point, in a working machine.

16. The engine room comprises a first frame portion provided along the front-rear direction on the cabin side, and a second frame portion whose base end is rotatably supported by the first frame portion. The tip of the second frame portion is attached to the inner wall of the right exterior cover. The working machine according to claim 15.

17. The upper cover is rotatably mounted on the upper part of the second frame portion. The work machine according to claim 16.

Images