Work machine

Abstract

To provide a work machine which can efficiently arrange a plurality of electric equipment (electric components) with a small number of parts, in a limited space in an engine room.SOLUTION: A hydraulic shovel as a work machine includes: an engine room; an electric component mounting plate that is arranged in the engine room, where electric components are mounted; a turning frame arranged in the bottom of the engine room; and a seat mount which is arranged above the turning frame, and acts as a part of an external wall of the engine room. The electric component mounting plate is arranged above the turning frame and arranged below the seat mount, and is arranged so as to face a bonnet arranged on the side of the engine room and behind the work machine.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a work machine having an engine room. [Background technology]

[0002] Conventionally, techniques for arranging multiple controllers in the engine room of a hydraulic excavator have been proposed. For example, in Patent Document 1, multiple controllers are fixed to a mounting plate, and the mounting plate is fixed to a housing to form a controller accommodating device, which is then arranged in the engine room. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-101660 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology of Patent Document 1 requires the use of mounting plates and housings to arrange multiple controllers, which are electrical equipment, in the engine room, resulting in a large number of parts. For this reason, when the engine room is particularly narrow, such as in a small hydraulic excavator, it is not possible to efficiently arrange multiple electrical equipment in that narrow, limited space.

[0005] The present invention has been made to solve the above problems, and its object is to provide a work machine in which a plurality of electrical equipment (electrical components) can be efficiently arranged with a small number of components in the limited space inside the engine room. [Means for solving the problem]

[0006] A work machine according to one aspect of the present invention is a work machine equipped with an engine room, and comprising: an electrical component mounting plate that is disposed in the engine room and on which electrical components are attached; a revolving frame that is disposed at the bottom of the engine room; and a seat mount that is disposed above the revolving frame and is part of the outer wall of the engine room, wherein the electrical component mounting plate is disposed above the revolving frame and below the seat mount, and is disposed so as to face a hood that is disposed to the side of the engine room and at the rear of the work machine. Moreover, a work machine according to another aspect of the present invention is a work machine equipped with an engine room, and comprising an electric component mounting plate that is disposed in the engine room and on which at least first and second electric components are mounted, the first electric component being mounted on either the front or back surface of the electric component mounting plate and the second electric component being mounted on the other of the front or back surface of the electric component mounting plate, the work machine further comprising a hood located on the side of the engine room, a revolving frame located at the bottom of the engine room, and a seat mount that is located above the revolving frame and forms part of the outer wall of the engine room, the electric component mounting plate being supported from above and from the front by the seat mount and being disposed facing the hood. [Effects of the Invention]

[0007] According to the above configuration, a plurality of electrical equipment (electrical components) can be efficiently arranged in the limited space in the engine room with a small number of components. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a side view showing a schematic configuration of a hydraulic excavator, which is an example of a work machine according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of the hydraulic excavator from the rear. [Figure 3] FIG. 2 is a perspective view showing the inside of an engine room of the hydraulic excavator. [Figure 4] 4 is a perspective view of the electrical equipment mounting board arranged in the engine room as viewed from the mounting side of the first electrical equipment. FIG. [Figure 5] FIG. 2 is a perspective view of the electrical equipment mounting board alone. [Figure 6] 4 is a perspective view of the electrical equipment mounting board as viewed from the mounting side of a second electrical equipment. FIG. [Figure 7] FIG. 2 is a perspective view of the hydraulic excavator from the rear with the left hood removed. [Figure 8] FIG. 2 is a perspective view of the hydraulic excavator from the rear with a cover member removed from the electrical equipment mounting board. [Figure 9] FIG. 4 is an enlarged perspective view showing the inside of the engine room with the electrical equipment mounting board installed. [Figure 10] FIG. 4 is an enlarged perspective view showing the inside of the engine room with the electrical equipment mounting board removed. [Figure 11] 4 is a side view of the electrical component mounting board with the first electrical component and the second electrical component mounted thereon. FIG. [Figure 12] FIG. 4 is a perspective view of the cover member attached to the electrical equipment mounting board. [Figure 13] FIG. 4 is a perspective view of the cover member in a state where it is separated from the electrical equipment mounting board. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following describes an embodiment of the present invention with reference to the drawings.

[0010] [1. Work Machinery] 1 is a side view showing a schematic configuration of a hydraulic excavator 1, which is an example of a work machine according to this embodiment. The hydraulic excavator 1 includes a lower traveling structure 2, a work implement 3, and an upper rotating structure 4.

[0011] Here, directions in FIG. 1 are defined as follows. First, the direction in which the lower traveling body 2 moves straight is the fore-and-aft direction, with one side of this being the "front" and the other side being the "rear." In FIG. 1, as an example, the side of the blade 23 relative to the traveling motor 22 is shown as the "front." Also, the lateral direction perpendicular to the fore-and-aft direction is the left-and-right direction. In this case, the left side as seen from the operator (operator) sitting in the cockpit 41a is defined as the "left," and the right side is defined as the "right." Furthermore, the direction of gravity perpendicular to the fore-and-aft direction and the left-and-right direction is defined as the up-and-down direction, with the upstream side of the direction of gravity being defined as the "up" and the downstream side being defined as the "down."

[0012] The lower traveling body 2 is driven by power from the engine 40 and causes the hydraulic excavator 1 to travel. The lower traveling body 2 is equipped with a pair of left and right crawlers 21 and a pair of left and right traveling motors 22. Each traveling motor 22 is a hydraulic motor. The left and right traveling motors 22 drive the left and right crawlers 21, respectively, thereby moving the hydraulic excavator 1 forward and backward. The lower traveling body 2 is provided with a blade 23 for performing ground leveling work. The blade 23 is driven by a blade cylinder (not shown). The blade cylinder is a hydraulic cylinder that rotates the blade 23 up and down.

[0013] The work machine 3 is driven by power from the engine 40 and performs excavation work to dig up earth and sand, etc. The work machine 3 includes a boom 31, an arm 32, and a bucket 33. Excavation work can be performed by independently driving the boom 31, the arm 32, and the bucket 33.

[0014] The boom 31 is rotated by a boom cylinder 31a. The base end of the boom cylinder 31a is supported at the front of the upper rotating body 4 and is movable so as to be telescopic. The arm 32 is rotated by an arm cylinder 32a. The base end of the arm cylinder 32a is supported at the tip of the boom 31 and is movable so as to be telescopic. The bucket 33 is rotated by a bucket cylinder 33a. The base end of the bucket cylinder 33a is supported at the tip of the arm 32 and is movable so as to be telescopic. The boom cylinder 31a, arm cylinder 32a, and bucket cylinder 33a are constituted by hydraulic cylinders.

[0015] The upper rotating body 4 is configured to be able to rotate relative to the lower traveling body 2 via a rotation bearing (not shown). A control unit 41, a rotation frame 42, a rotation motor 43, an engine room 44, etc. are arranged on the upper rotating body 4. In other words, the hydraulic excavator 1 is equipped with at least the engine room 44. The upper rotating body 4 rotates via the rotation bearing by being driven by the rotation motor 43, which is a hydraulic motor. In addition to an engine 40 that provides power to each part, multiple hydraulic pumps (not shown) driven by the engine 40 are arranged at the rear of the upper rotating body 4.

[0016] Each hydraulic pump supplies hydraulic oil (pressurized oil) to a hydraulic motor (for example, the left and right travel motors 22, the swing motor 43) and a hydraulic cylinder (for example, the blade cylinder 23a, the boom cylinder 31a, the arm cylinder 32a, and the bucket cylinder 33a). The hydraulic motors and hydraulic cylinders that are driven by the supply of hydraulic oil from any hydraulic pump are collectively called hydraulic actuators.

[0017] A cockpit 41a is arranged in the control section 41 where the operator sits. Operating sections 41b are arranged around the cockpit 41a (particularly in front, on the left and right).

[0018] The operating unit 41b is composed of an operating lever, switch, button, etc. for driving the hydraulic actuator. The operator sits in the operator's seat 41a and operates the operating unit 41b to drive the hydraulic actuator. This allows the lower traveling body 2 to travel, the blade 23 to perform ground leveling work, the work implement 3 to perform excavation work, crane work, the upper rotating body 4 to rotate, etc.

[0019] FIG. 2 is a perspective view of the hydraulic excavator 1, seen from the rear. A counterweight 45 is provided at the rear lower part of the upper rotating body 4. The counterweight 45 is located adjacent to the side frames 46 in the direction of rotation. The side frames 46 are located rising from the left and right sides of the rotating frame 42 (see FIG. 1). A hood 47 is located above the counterweight 45 and the side frames 46. The hoods 47 include a left hood 47L and a right hood 47R located on the left and right sides of the upper rotating body 4, and a rear hood 47B located at the rear of the upper rotating body 4. In other words, the hydraulic excavator 1 has (at least) a hood 47 (e.g., the left hood 47L) located on the side of the engine room 44. Each hood 47 is detachably provided with respect to the frame of the upper rotating body 4.

[0020] Figure 3 is a perspective view showing the inside of the engine room 44 of the upper rotating body 4. The engine room 44 is made up of a space surrounded by the rotating frame 42, the seat mount 48, and the counterweight 45, side frames 46, and hood 47 shown in Figure 2. The rotating frame 42 is located at the bottom of the engine room 44. The seat mount 48 is a base on which the seat of the operator's seat 41a (see Figure 1) is installed, and is located above the rotating frame 42. In other words, the hydraulic excavator 1 is equipped with the rotating frame 42 located at the bottom of the engine room 44, and the seat mount 48 located above the rotating frame 42 and forming part of the outer wall of the engine room 44.

[0021] The engine 40 described above is installed in the engine room 44 as a prime mover. That is, the hydraulic excavator 1 is equipped with a prime mover (engine 40) installed in the engine room 44. Note that the prime mover is not limited to the engine 40 and may be, for example, an electric motor. Furthermore, the prime mover may be composed of both the engine 40 and an electric motor.

[0022] [2. Electrical equipment mounting board] As shown in FIG. 3, an electrical equipment mounting board 100 is disposed in the engine room 44. In particular, in this embodiment, the electrical equipment mounting board 100 is disposed opposite the left hood 47L (see FIG. 2) located on the side of the engine room 44. Electrical equipment is mounted on the electrical equipment mounting board 100. Examples of the electrical equipment include an integrated controller (integrated ECU) that controls the entire hydraulic excavator 1, a controller (engine ECU) that controls the engine 40, and electrical equipment such as relays. The ECU is a controller known as an electronic control unit (Electronic Control Unit).

[0023] Here, for the purpose of distinguishing between the electrical components, the integrated ECU will be referred to as the first electrical component 101 (see FIG. 3) and the engine ECU will be referred to as the second electrical component 102 (see FIG. 6). In this case, it can be said that the hydraulic excavator 1 is equipped with an electrical component mounting board 100 on which at least the first electrical component 101 and the second electrical component 102 are mounted.

[0024] Fig. 4 is a perspective view of the electrical equipment mounting board 100 as viewed from the mounting side of the first electrical equipment 101. Fig. 5 is a perspective view of the electrical equipment mounting board 100 alone. Fig. 6 is a perspective view of the electrical equipment mounting board 100 as viewed from the mounting side of the second electrical equipment 102. As shown in these figures, the first electrical equipment 101 is mounted to a front surface 100a, which is one surface of the electrical equipment mounting board 100, using a bolt 101a and a nut (not shown). The bolt 101a is inserted from the front surface 100a side into a mounting hole 100c1 (see Fig. 5) provided in the electrical equipment mounting board 100, and is screwed into the inner peripheral surface of the nut located on the back surface 100b side.

[0025] The second electrical component 102 is mounted on the back surface 100b, which is the other surface of the electrical component mounting board 100, using bolts 102a and nuts (not shown). The bolts 102a are inserted into mounting holes 100c2 (see FIG. 5) provided in the electrical component mounting board 100 from the back surface 100b side and screwed into the inner peripheral surface of the nuts located on the front surface 100a side. Although not shown, the first electrical component 101 may be mounted on the back surface 100b of the electrical component mounting board 100 using bolts, and the second electrical component 102 may be mounted on the front surface 100a of the electrical component mounting board 100 using bolts.

[0026] Therefore, in this embodiment, it can be said that the first electrical component 101 is mounted on either the front surface 100a or the back surface 100b of the electrical component mounting board 100, and the second electrical component 102 is mounted on the other of the front surface 100a or the back surface 100b of the electrical component mounting board 100.

[0027] In this configuration, multiple electrical components (first electrical component 101, second electrical component 102) are mounted together on a single electrical component mounting board 100. Therefore, even if the engine room 44 is a small space, multiple electrical components can be efficiently arranged in that small, limited space using a single electrical component mounting board 100 and a small number of parts. Therefore, the configuration using the above-described electrical component mounting board 100 is extremely effective when arranging multiple electrical components in the engine room 44, particularly in a hydraulic excavator 1, which is a small work machine with a small internal space in the engine room 44.

[0028] 3, the first electrical component 101 mounted on the electrical component mounting board 100 is located in the engine room 44 between the left hood 47L (see FIG. 2) located on the side of the engine room 44 and the electrical component mounting board 100. Although not shown, the second electrical component 102 mounted on the electrical component mounting board 100 may be located in the engine room 44 between the left hood 47L and the electrical component mounting board 100.

[0029] Therefore, in this embodiment, it can be said that either the first electrical equipment 101 or the second electrical equipment 102 is located within the engine room 44, between the left hood 47L located on the side of the engine room 44 and the electrical equipment mounting board 100.

[0030] FIG. 7 is a perspective view of the hydraulic excavator 1 from the rear with the left hood 47L removed. FIG. 8 is a perspective view of the hydraulic excavator 1 from the rear with a cover member 104 (details of which will be described later) removed from the electrical equipment mounting board 100. For example, if the first electrical component 101 is located between the left hood 47L and the electrical equipment mounting board 100 in the engine room 44, a worker (maintenance technician) can easily access the first electrical component 101 by removing the left hood 47L (see FIG. 7) and then removing the exposed cover member 104 (see FIG. 8). Note that even if the second electrical component 102 is located between the left hood 47L and the electrical equipment mounting board 100 in the engine room 44, the worker can easily access the second electrical component 102 by following the same steps as above.

[0031] Therefore, an operator can inspect and check the electrical equipment located on the left hood 47L side simply by removing the left hood 47L, that is, without removing the electrical equipment mounting board 100 from the engine room 44 (with the electrical equipment mounting board 100 installed in the engine room 44). As a result, maintenance of the electrical equipment can be easily performed.

[0032] Furthermore, in a configuration in which the electrical equipment mounting board 100 is disposed opposite the left hood 47L in the engine room 44, the electrical equipment mounting board 100 is disposed vertically in the engine room 44. That is, the front surface 100a and the back surface 100b of the electrical equipment mounting board 100 are parallel to each other in the vertical direction. By disposing the electrical equipment mounting board 100 vertically in this manner, it is possible to effectively utilize the narrow, vertically elongated space near the left hood 47L in the engine room 44. That is, the first electrical component 101 and the second electrical component 102 can be efficiently disposed in the narrow space in the engine room 44 together with the electrical equipment mounting board 100.

[0033] In this embodiment, as described above, the first electrical component 101 is an integrated ECU, and the second electrical component 102 is an engine ECU. The first electrical component 101 is located on the left hood 47L side of the electrical component mounting board 100, and the second electrical component 102 is located on the opposite side of the left hood 47L from the electrical component mounting board 100. In other words, of the first electrical component 101 and the second electrical component 102, the electrical component located on the opposite side of the left hood 47L from the electrical component mounting board 100 is a controller (engine ECU) that controls the engine 40 as a prime mover.

[0034] In this arrangement, the distance between the engine 40 as a prime mover located inside the engine room 44 and the second electrical component 102 as a controller that controls the engine 40 is shorter than, for example, a configuration in which the second electrical component 102 is located on the left hood 47L side of the electrical component mounting board 100. This allows the wiring (harness) drawn from the second electrical component 102 toward the engine 40 to be shorter, thereby facilitating the routing of the wiring.

[0035] [3. How to install the electrical equipment mounting board] 4 to 6, through holes 100h are formed in the peripheral portion of the electrical equipment mounting board 100. In these figures, three through holes 100h are formed along the edge of the electrical equipment mounting board 100, but the number of through holes 100h is not particularly limited.

[0036] 9 is an enlarged perspective view showing the inside of the engine room 44 with the electrical equipment mounting board 100 installed. FIG. 10 is an enlarged perspective view showing the inside of the engine room 44 with the electrical equipment mounting board 100 removed. As shown in FIG. 10, a bracket 49 is fixed by welding or the like to the engine room 44 side of the seat mount 48. The bracket 49 is formed in a shape (for example, an L-shape) that follows the unevenness of the seat mount 48 that forms the upper wall and front wall of the engine room 44, and is fixed to the back side of the seat mount 48 (the side opposite the seat mounting side). An insertion hole 49a is formed in the bracket 49 at a position corresponding to the through hole 100h of the electrical equipment mounting board 100.

[0037] The through-hole 100h of the electrical equipment mounting board 100, on which the first electrical component 101 and the second electrical component 102 are mounted on the front and rear sides, is aligned with the insertion hole 49a of the bracket 49, and a bolt 50 (see FIG. 9) serving as a fastening member is inserted sequentially into the through-hole 100h and the insertion hole 49a and screwed into the inner peripheral surface of a nut (not shown) located at the exit of the insertion hole 49a. This fixes the electrical equipment mounting board 100 to the back side of the seat mount 48 via the bracket 49. As a result, the electrical equipment mounting board 100 is positioned closer to the seat mount 48 than between the revolving frame 42 (see FIG. 3) and the seat mount 48. In other words, the electrical equipment mounting board 100 is positioned at an upper position within the engine room 44. To remove the electrical equipment mounting board 100, the bolt 50 is loosened to release the connection with the nut, allowing the electrical equipment mounting board 100 to be easily removed from the seat mount 48 (bracket 49).

[0038] Incidentally, when rainwater during rainy weather or washing water during a car wash (hereinafter referred to as rainwater, etc.) seeps into the engine room 44 through gaps in the outer walls of the engine room 44 (for example, the gap between the left hood 47L and the rear hood 47B), the rainwater, etc. flows downward inside the engine room 44. As described above, in a configuration in which the electrical equipment mounting board 100 is located closer to the seat mount 48 in the engine room 44, that is, in a configuration in which the electrical equipment mounting board 100 is located at an upper part in the engine room 44, it is possible to reduce the risk that rainwater, etc. that seeps into the engine room 44 (for example, from the side) at a position below the electrical equipment mounting board 100 will adversely affect the multiple electrical components mounted on the electrical equipment mounting board 100. For example, it is possible to reduce the risk that the multiple electrical components will be damaged (broken down) by the rainwater, etc.

[0039] The fixing location of the electrical equipment mounting board 100 on the seat mount 48 may be only the portion of the seat mount 48 that forms the upper wall of the engine room 44, or only the portion that forms the front wall of the engine room 44. In other words, the electrical equipment mounting board 100 may be supported from above, from the front (side), or both above and from the front within the engine room 44.

[0040] In any case, it is desirable that the electrical equipment mounting board 100 is disposed in the seat mount 48 in a direction perpendicular to a horizontal portion 48a (see FIGS. 9 and 10) that forms part of the ceiling of the engine room 44. In this configuration, even if rainwater or the like enters the engine room 44 and comes into contact with the electrical equipment mounting board 100, the rainwater or the like falls along the electrical equipment mounting board 100. This prevents rainwater or the like from accumulating on the electrical equipment mounting board 100, and reliably reduces the risk of damage to multiple electrical components due to rainwater or the like.

[0041] The hydraulic excavator 1 also includes a bracket 49 that is fixed to the seat mount 48. The electrical component mounting board 100 is detachably fixed to the bracket 49 (using bolts 50 and nuts).

[0042] Because the electrical equipment mounting board 100 is fixed to the seat mount 48 via the bracket 49, it is easy to fix the electrical equipment mounting board 100 to the back side (engine room 44 side) of the seat mount 48 regardless of the uneven shape of the seat mount 48. Furthermore, by removing the left hood 47L, an operator can release the electrical equipment mounting board 100 from the bracket 49 and remove the electrical equipment mounting board 100 from the engine room 44. This allows the operator to access the electrical equipment (e.g., the second electrical equipment 102) that is located farther from the left hood 47L than the electrical equipment mounting board 100, out of the first electrical equipment 101 and the second electrical equipment 102, and perform maintenance on that electrical equipment. Of course, after removing the electrical equipment mounting board 100 from the engine room 44, the operator can also perform maintenance on the other electrical equipment (the first electrical equipment 101).

[0043] [4. Configuration that takes into account the cooling efficiency of electrical components] 4 to 6, the electrical equipment mounting board 100 has a board opening 100p. The board opening 100p is an opening formed by penetrating the electrical equipment mounting board 100 in the thickness direction. The board opening 100p is formed, for example, in a rectangular shape in a plan view, but may be formed in a polygonal shape other than a rectangular shape, or may be formed in a circular shape, oval shape, or the like.

[0044] The first electrical component 101 and the second electrical component 102 are mounted on the electrical component mounting board 100 so as to cover a portion of the board opening 100p. In other words, a portion of the board opening 100p is located between the first electrical component 101 and the second electrical component 102.

[0045] In this configuration, air (e.g., cooling air) from within the engine room 44 can be applied to both the first electrical component 101 and the second electrical component 102 mounted on the electrical component mounting board 100 from the mounting side of the electrical components (the electrical component mounting board 100 side) through the board opening 100p. Also, heat generated by both the first electrical component 101 and the second electrical component 102 can be released to the outside through the board opening 100p. As a result, the cooling efficiency (heat dissipation efficiency) of both the first electrical component 101 and the second electrical component 102 can be improved.

[0046] 11 is a side view of the electrical equipment mounting board 100 with the first electrical equipment 101 and the second electrical equipment 102 mounted thereon. In this embodiment, the second electrical equipment 102 is mounted to the electrical equipment mounting board 100 via a pillar 103. The pillar 103 is formed, for example, with a nut. A bolt 102a for mounting the second electrical equipment 102 is inserted into the pillar 103, inserted into a mounting hole 100c2 (see FIG. 5) of the electrical equipment mounting board 100, and screwed into the inner circumferential surface of a nut (not shown) located on the first electrical equipment 101 side of the electrical equipment mounting board 100, thereby fixing the second electrical equipment 102 to the electrical equipment mounting board 100 via the pillar 103.

[0047] The first electrical component 101 may be mounted on the electrical component mounting board 100 via a pillar (not shown). In this case, a bolt 101a (see FIG. 4) for mounting the first electrical component 101 is inserted into the pillar, inserted into a mounting hole 100c1 (see FIG. 5) of the electrical component mounting board 100, and screwed into an inner peripheral surface of a nut (not shown) located on the second electrical component 102 side of the electrical component mounting board 100, thereby fixing the first electrical component 101 to the electrical component mounting board 100 via the pillar.

[0048] Therefore, in this embodiment, it can be said that at least one of the first electrical component 101 and the second electrical component 102 may be mounted on the electrical component mounting board 100 via a pillar (for example, the pillar 103).

[0049] In this configuration, a gap equal to the height of a pillar (for example, pillar 103) can be secured between the electrical component mounting board 100 and an electrical component (for example, second electrical component 102). Cooling air can be applied to the electrical component through this gap. Heat generated by the electrical component can also be released to the outside through this gap. As a result, the cooling efficiency of the electrical component can be improved.

[0050] The height of the pillar determines the gap between the electrical equipment mounting board 100 and the electrical equipment, and the higher the pillar, the larger the gap, resulting in improved cooling efficiency. Nuts of any height can be used as nuts that make up the pillar, but from the perspective of improving the cooling efficiency described above, it is desirable to use tall nuts (tall nuts).

[0051] It is desirable to provide a vibration-isolating member such as a rubber vibration-isolating member between the pillar 103 and the electrical equipment (for example, the second electrical equipment 102). In this case, the vibration-isolating member can absorb vibrations that are generated in the hydraulic excavator 1 and transmitted to the electrical equipment via the electrical equipment mounting member 100 and the pillar 103. This can reduce damage to the electrical equipment caused by the vibrations.

[0052] [5. Cover material] Fig. 12 is a perspective view of the cover member 104 attached to the electrical equipment mounting board 100. Fig. 13 is a perspective view of the cover member 104 separated from the electrical equipment mounting board 100. The cover member 104 protects the first electrical equipment 101 by covering the first electrical equipment 101 with respect to the electrical equipment mounting board 100.

[0053] The cover member 104 is attached to the electrical equipment mounting board 100 using a spacer 105. The spacer 105 is, for example, a hollow member. The cover member 104 has holes 104a formed at predetermined positions into which bolts (not shown) are inserted. The electrical equipment mounting board 100 also has holes (not shown) formed in positions corresponding to the holes 104a of the cover member 104. The bolts are inserted sequentially into the holes 104a of the cover member 104, the spacer 105, and the holes of the electrical equipment mounting board 100, and then screwed into the inner peripheral surfaces of nuts (not shown) located on the second electrical equipment 102 side of the electrical equipment mounting board 100, thereby attaching the cover member 104 to the electrical equipment mounting board 100.

[0054] Note that the electrical component mounting board 100 may be provided with another cover member that covers the second electrical component 102. Therefore, it can be said that the hydraulic excavator 1 of this embodiment may be provided with a cover member (e.g., cover member 104) that individually covers at least one of the first electrical component 101 and the second electrical component 102 on the electrical component mounting board 100. Details of the cover member 104 that covers the first electrical component 101 will be described below, but the configuration of the cover member 104 can also be applied to the cover member that covers the second electrical component 102.

[0055] The cover member 104 has a first flat plate portion 111 and a second flat plate portion 112. The first flat plate portion 111 and the second flat plate portion 112 are located on the same plane and are connected in the vertical direction. The first flat plate portion 111 is located higher than the second flat plate portion 112. The first flat plate portion 111 and the second flat plate portion 112 are located opposite the electrical equipment mounting board 100.

[0056] The first flat plate portion 111 has an upper end portion 111a and a side end portion 111b. The upper end portion 111a and the side end portion 111b are connected to a side wall 113. An end portion of the side wall 113 opposite to the first flat plate portion 111 can come into contact with the electrical equipment mounting board 100.

[0057] The second flat plate portion 112 has a lower end portion 112a and a side end portion 112b. However, the lower end portion 112a and the side end portion 112b are not connected to side walls corresponding to the side walls 113 of the first flat plate portion 111. Therefore, when the cover member 104 is attached to the electrical equipment mounting board 101, a gap S (see FIG. 12 ) corresponding to the height of the side walls 113 of the first flat plate portion 111 (the height in the opposing direction between the first flat plate portion 111 and the electrical equipment mounting board 100) is formed between the lower end portion 112a and the side end portion 112b of the second flat plate portion 112 and the electrical equipment mounting board 100.

[0058] Note that a side wall corresponding to the side wall 113 of the first flat plate portion 111 may be formed at the side end portion 112b of the second flat plate portion 112 and connected to the side wall 113. In this case, when the cover member 104 is attached to the electrical equipment mounting board 101, a gap S corresponding to the height of the side wall 113 of the first flat plate portion 111 is formed between the lower end portion 112a of the second flat plate portion 112 and the electrical equipment mounting board 100.

[0059] In either case, it can be said that the cover member 104 has a lower end portion 112a that faces the electrical equipment mounting board 100 with the gap S therebetween.

[0060] With the above-described configuration of the cover member 104, even if rainwater or the like seeps into the engine room 44, the rainwater or the like flows downward through the gap S between the lower end portion 112a of the cover member 104 and the electrical component mounting board 100. This makes it possible to prevent rainwater or the like from accumulating inside the cover member 104 and damaging the electrical components (e.g., the first electrical component 101). In other words, the electrical components can be protected from rainwater or the like. Furthermore, cooling air can be applied to the electrical components covered by the cover member 104 through the gap S, and heat generated by the electrical components can be released to the outside through the gap S. This also makes it possible to improve the cooling efficiency of the electrical components.

[0061] [6. Other] In this embodiment, an example has been described in which the electrical equipment mounting board 100 is arranged vertically in the engine room 44, but it may also be arranged horizontally. Even in this case, the fact remains that multiple electrical equipment can be mounted together on a single electrical equipment mounting board 100 and arranged in the engine room 44. Therefore, the same effect as in this embodiment can be obtained, that is, multiple electrical equipment can be efficiently arranged in the engine room 44 using a single electrical equipment mounting board 100 with a small number of parts.

[0062] In this embodiment, a hydraulic excavator 1, which is a construction machine, has been used as an example of a work machine, but the work machine is not limited to the hydraulic excavator 1 and may be other construction machines such as a wheel loader, or agricultural machines such as a combine harvester or a tractor.

[0063] Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these, and the invention can be expanded or modified without departing from the spirit of the invention. [Industrial Applicability]

[0064] The present invention can be used in work machines such as construction machines and agricultural machines. [Explanation of symbols]

[0065] 1. Hydraulic excavator (work machine) 40 Engine (prime mover) 42 Swivel frame 44 Engine Room 48 Seat Mount 48a Horizontal section 49 Bracket 74L Left bonnet (bonnet) 100 Electrical equipment mounting board 100a surface 100b back side 100p board opening 101 First Electrical Equipment 102 Second Electrical Equipment 103 Pillar 104 Cover member 112a Lower end S Gap

Claims

1. A work machine equipped with an engine room, an electrical component mounting plate disposed in the engine room and on which electrical components are mounted; a rotating frame disposed at the bottom of the engine room; a seat mount disposed above the revolving frame and forming part of an outer wall of the engine room; a work machine, wherein the electrical component mounting plate is disposed above the revolving frame and below the seat mount, and is disposed so as to face a hood that is disposed to the side of the engine room and at the rear of the work machine.

2. The work machine according to claim 1 , wherein the electrical component mounting plate is disposed along an outer edge of a notched side of the seat mount that is covered by the hood.

3. 3. The work machine according to claim 1, wherein the electrical component mounting plate is disposed on the rear side of the upper wall of the engine room via a bracket fixed to the rear side of the seat mount.

4. 4. A work machine according to claim 1, wherein the electrical component mounting plate is disposed at the seat mount in a direction perpendicular to a horizontal portion that forms part of the ceiling of the engine room.

5. an operating lever disposed on the side of the pilot's seat above the seat mount; 5. The work machine according to claim 1, wherein the electrical component mounting plate is disposed facing rearward of the operating lever.

6. A work machine equipped with an engine room, an electric component mounting plate disposed in the engine room and on which at least a first electric component and a second electric component are mounted; the first electrical component is attached to either the front or rear surface of the electrical component mounting plate, the second electrical component is attached to the other of the front surface and the back surface of the electrical component mounting plate, The work machine includes: a hood located on the side of the engine room; a revolving frame located at the bottom of the engine room; a seat mount located above the rotating frame and forming part of an outer wall of the engine room; The electrical component mounting plate is supported from above and from the front by the seat mount and is disposed facing the hood.

7. The work machine of claim 6 , wherein an edge of the electrical component mounting plate is secured to the seat mount via a bracket.

8. The work machine according to claim 7 , wherein the bracket is formed in a shape that follows the irregularities on the back side of the seat mount and is fixed to the back side of the seat mount.

9. 9. The work machine according to claim 6, wherein, at a position of the seat mount below a horizontal portion that forms part of a ceiling of the engine room, the electrical component mounting plate is disposed rearward of the seat mount and faces the hood.

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