Work machine

Abstract

To properly arrange various members in a limited space below a driver's seat in a small working machine.SOLUTION: The hydraulic excavator 1 as the work machine includes the first body part 211 as the first support part and the body part 221 as the third support part that are connected to the laterally central portion of the vehicle body frame 11 and extend upward, and the second body part 212 as the second support part that connects the upper end portions of the first body part 211 as the first support part and the body part 221 as the third support part, and the first body part 211 as the first support part is connected to the vehicle body frame 11 behind the pivot shaft AX1 as the pivot center. The main body portion 221, which is the third support portion, is connected to the vehicle body frame 11 at the rear of the vehicle body.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present disclosure relates to work machines. [Background technology]

[0002] BACKGROUND ART There is known a work machine in which a battery stand on which a battery is attached is provided on a machine body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-004668 Summary of the Invention [Problem to be solved by the invention]

[0004] Work machines such as battery-powered hydraulic excavators, known as micro excavators, which have smaller bodies than the work vehicle disclosed in Patent Document 1, have limited space inside their bodies. For this reason, there is room for improvement in the appropriate placement of the battery and various components in small work machines.

[0005] An object of an aspect of the present invention is to appropriately arrange various components in a limited space below the driver's seat in a small work machine. [Means for solving the problem]

[0006] According to the present disclosure, there is provided a work machine comprising: a first member extending upward behind the center of rotation of a body frame; a third member extending upward behind the body of the body frame; a second member connecting the upper ends of the first member and the third member; and a battery, wherein the battery is arranged to one side in the left-right direction of the second member when viewed from above. [Effects of the Invention]

[0007] According to the present disclosure, in a small work machine, various components can be appropriately arranged in the limited space below the driver's seat. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a hydraulic excavator according to an embodiment, as viewed from the left front. [Figure 2] FIG. 2 is a perspective view of the hydraulic excavator according to the embodiment, as viewed from the right rear. [Figure 3] FIG. 3 is a rear view of the state in which the rear cover is open. [Figure 4] FIG. 4 is a perspective view of the rear cover when viewed from the left rear. [Figure 5] FIG. 5 is a diagram showing the arrangement of the components arranged behind the exterior cover. [Figure 6] FIG. 6 is a partial enlarged view of the seal member. [Figure 7] FIG. 7 is a perspective view of the hinge seen from the upper right with the rear cover closed. [Figure 8] FIG. 8 is a perspective view of the hinge as seen from the right rear. [Figure 9] FIG. 9 is a plan view of the hinge as seen from above. [Figure 10] FIG. 10 is a side view showing the arrangement of the members arranged below the driver's seat. [Figure 11] FIG. 11 is a perspective view showing the arrangement of the members arranged below the driver's seat. [Figure 12] FIG. 12 is a perspective view of the support member, the bracket for piping and electric wires, and the bracket for a filter. [Figure 13] FIG. 13 is a front view of the water-stopping member. [Figure 14] FIG. 14 is a perspective view showing the opening at the upper end of the exterior cover. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. The components of the embodiments described below can be combined as appropriate. In addition, some components may not be used.

[0010] (Embodiment) <Work machinery> Fig. 1 is a perspective view of the hydraulic excavator according to the embodiment, as seen from the front left. Fig. 2 is a perspective view of the hydraulic excavator according to the embodiment, as seen from the rear right. In this embodiment, the work machine is a battery-powered hydraulic excavator (hereinafter referred to as "hydraulic excavator") 1. The hydraulic excavator 1 is an electrically driven hydraulic excavator powered by a battery (not shown) housed in a battery case 30 (see Fig. 11), which is an electricity storage device.

[0011] In the following description, the side of the hydraulic excavator 1 on which the work implement 12 is arranged is the front, and the side opposite the front is the rear. In the embodiment, left and right refer to left and right relative to the front. The left and right direction is the width direction of the vehicle body 10 of the hydraulic excavator 1. The upper side is the side that faces the vehicle body 10 and is perpendicular to the plane (ground plane) that contacts the pair of left and right tracks 18. The lower side is the side opposite the upper side. An axis that faces the fore-and-aft direction of the vehicle body 10 and passes through the center of the vehicle body 10 in the width direction is called the fore-and-aft axis (central axis), and an axis that is perpendicular to the central axis, parallel to the installation plane, and faces the vehicle width direction of the vehicle body 10 is called the lateral axis. An axis that faces the up-and-down direction of the vehicle body 10 is called the vertical axis. The vertical axis is perpendicular to both the central axis and the lateral axis. The central axis is the X-axis, the vertical axis is the Y-axis, and the lateral axis is the Z-axis.

[0012] The hydraulic excavator 1 of the embodiment is a so-called micro excavator, which is a small hydraulic excavator with a working machine mass of less than 1 ton.

[0013] The hydraulic excavator 1 includes a vehicle body 10, a work implement 12, a blade 121, an operating unit 13, a driver's seat 14, an exterior cover 15, a floor plate 17, and a pair of left and right tracks 18. The vehicle body 10 has a vehicle body frame 11 (see FIG. 10). The vehicle body frame 11 supports the work implement 12, the blade 121, the operating unit 13, the driver's seat 14, the exterior cover 15, the components inside the exterior cover 15, and the floor plate 17. The tracks 18 are disposed at the left and right ends of the vehicle body 10, respectively.

[0014] The operating unit 13 is disposed in front of the driver's seat 14. The operating unit 13 is made up of various operating levers and the like that the operator uses to operate the hydraulic excavator 1. More specifically, the operating unit 13 is made up of various operating levers and the like that the operator uses to operate the travel of the hydraulic excavator 1 and the work performed by the work implement 12.

[0015] The driver's seat 14 is an operator's seat on which the operator of the hydraulic excavator 1 sits. The driver's seat 14 is disposed in the vehicle body 10 of the hydraulic excavator 1. The driver's seat 14 is supported by a support member 20, which will be described later. The driver's seat 14 is attached above the exterior cover 15. The entire driver's seat 14 is detachable from the exterior cover 15. When the driver's seat 14 is to be removed, the driver's seat 14 is lifted upward relative to the exterior cover 15, with the engagement between a locking portion 233, which will be described later, and a hook member provided below the driver's seat 14 released. When the entire driver's seat 14 is removed in this way, the components below the driver's seat 14 are exposed from an opening S1 in the upper end portion 15a of the exterior cover 15.

[0016] The exterior cover 15 has a box shape with openings at the bottom, top, and rear. The exterior cover 15 is disposed to cover the components disposed below the operator's seat 14. The exterior cover 15 houses the battery case 30 and the like inside. The exterior cover 15 is disposed on the vehicle body 10 of the hydraulic excavator 1. The exterior cover 15 is disposed above the body frame 11 of the hydraulic excavator 1. The lower opening of the exterior cover 15 is covered by the vehicle body frame 11. The operator's seat 14 is detachably attached to an opening S1 above the exterior cover 15. A rear cover 16 is openably and closably attached to an opening S2 at the rear of the exterior cover 15. The exterior cover 15 has a rectangular outer shape that is approximately 10 cm or less larger than the perimeter of the operator's seat 14 when viewed in the vertical direction. In the embodiment, the exterior cover 15 has, for example, a length in the left-right direction and a length in the front-rear direction of approximately several tens of centimeters and a height in the vertical direction of approximately several tens of centimeters.

[0017] The sealing member 150 will be described with reference to Figures 3 and 4. Figure 3 is a view from the rear with the rear cover open. Figure 4 is a perspective view from the left rear with the rear cover open. A sealing member 150 is arranged on the periphery of the rear opening S2 of the exterior cover 15, in a portion that comes into contact with the periphery of the rear cover 16 when the rear cover 16 is closed. The sealing member 150 is a sealing member that prevents water from entering between the rear opening S2 of the exterior cover 15 and the rear cover 16. The sealing member 150 is made of an elastically deformable material such as rubber. The sealing member 150 is arranged on the periphery of the opening S2 except for the position where the hinge 160 is arranged.

[0018] The seal member 150 will be described in more detail using Figures 5 and 6. Figure 5 is a diagram showing the arrangement of each component arranged behind the exterior cover. Figure 6 is a partially enlarged view of the seal member. The seal member 150 includes a first seal member 150a and a second seal member 150b.

[0019] The first seal member 150a is disposed so as to sandwich the peripheral edge of the opening S2 of the exterior cover 15 from the inside and outside.

[0020] The second seal member 150b is disposed on the outward surface of the first seal member 150a. When the rear cover 16 is open, the second seal member 150b is exposed at the peripheral edge of the opening S2 of the exterior cover 15. When the rear cover 16 is closed, the second seal member 150b is pressed by the inner peripheral surface of the rear cover 16. When the rear cover 16 is closed, the second seal member 150b is pressed by the rear cover 16, thereby achieving watertightness.

[0021] The peripheral edge of the opening S2 of the exterior cover 15 is slightly inclined downward from the center toward the sides at the top of the opening S2. The first seal member 150a and the second seal member 150b arranged on the peripheral edge of the opening S2 are also slightly inclined downward from the center toward the sides at the top of the opening S2.

[0022] The rear cover 16 will be described with reference to Figures 3 and 4. The rear cover 16 can be opened and closed relative to the exterior cover 15 by rotating about an opening / closing axis AX9. The opening / closing axis AX9 of the rear cover 16 is disposed at the rear right of the vehicle body 10, in a direction slightly inclined with respect to the up-down and left-right directions. When the rear cover 16 is in the closed state, it closes the rear opening S2 of the exterior cover 15. When the rear cover 16 is in the open state, the handle portion of the battery housed in the battery case 30 is exposed, allowing the battery housed in the battery case 30 to be attached and detached. The lower end of the rear cover 16 is located at approximately the same height as the floor plate 17.

[0023] The rear cover 16 includes a main body 161, a hinge 160, and a key 162. The rear cover 16 is disposed rearward of the rear end of the hydraulic oil tank 31 and the rear end of the battery case 30.

[0024] The main body 161 is a plate member that closes the opening at the rear of the exterior cover 15. The main body 161 opens from left to right about an opening / closing axis AX9 located on the rear right side of the exterior cover 15 to enter an open state. The main body 161 rotates approximately 90° about the opening / closing axis AX9. Rotation of the main body 161 in the open direction is restricted by a hinge 160.

[0025] The hinge 160 is attached to the exterior cover 15 and the rear cover 16, allowing them to be opened and closed. The hinge 160 is arranged on one of the left and right sides of the vehicle body 10. The hinge 160 connects one of the left and right sides at the rear of the exterior cover 15 to one of the left and right sides at the rear of the main body 161 so that the exterior cover 15 can be opened and closed. In the embodiment, the hinge 160 connects the right rear side of the exterior cover 15 to the right side of the main body 161 so that the exterior cover 15 can be opened and closed. The hinge 160 is arranged in a state where the inside of the exterior cover 15 is connected to the inside of the rear cover 16. The hinge 160 is arranged rearward of the rear end of the hydraulic oil tank 31 and the rear end of the battery case 30.

[0026] The hinge 160 will be described in more detail using Figures 7 to 9. Figure 7 is a perspective view of the hinge seen from the upper right when the rear cover is closed. Figure 8 is a perspective view of the hinge seen from the right rear. Figure 9 is a plan view of the hinge seen from above. The hinge 160 includes an exterior cover side hinge 160a disposed on the right rear of the exterior cover 15, and a rear cover side hinge 160b disposed to the right of the main body 161 when the rear cover 16 is closed. The exterior cover side hinge 160a and the rear cover side hinge 160b are connected via an opening / closing axis AX9.

[0027] The exterior cover side hinge 160a is a plate member that is long in the vertical direction. The exterior cover side hinge 160a is arranged facing left. The exterior cover side hinge 160a is arranged rearward of the rear end of the hydraulic oil tank 31 and the rear end of the battery case 30. The hydraulic oil tank 31 and the tank cover 24 are arranged to the right of the vehicle body 10 where the exterior cover side hinge 160a is arranged. The battery case 30, which houses a battery inside, is arranged to the left of the vehicle body 10, opposite the right side where the exterior cover side hinge 160a is arranged.

[0028] An opening / closing axis AX9 is disposed along the rear end of the exterior cover side hinge 160a.

[0029] The rear cover side hinge 160b is arranged to be rotatable around the opening / closing axis AX9 relative to the exterior cover side hinge 160a. The rear cover side hinge 160b includes a wall portion 160b1, a wall portion 160b2, and a wall portion 160b3. The wall portions 160b1, 160b2, and 160b3 are made of plate materials that are long in the vertical direction. The wall portions 160b1, 160b2, and 160b3 are integrally formed. The wall portion 160b1 is arranged to face forward when the rear cover 16 is closed. The opening / closing axis AX9 is arranged along the right end of the wall portion 160b1. The left end of the wall portion 160b3 is connected to the front end of the wall portion 160b2. The wall portion 160b2 is arranged to face left when the rear cover 16 is closed. The right end of the wall portion 160b1 is connected to the rear end of the wall portion 160b2. The wall portion 160b3 is disposed facing rearward when the rear cover 16 is closed. The wall portion 160b1 is disposed to the right of the main body portion 161 when the rear cover 16 is closed.

[0030] The key 162 is arranged on the other side in the left-right direction. The key 162 is arranged on the main body 161 on the opposite side in the left-right direction from the hinge 160. In the embodiment, the key 162 is arranged on the left side of the main body 161 when the rear cover 16 is closed. When the rear cover 16 is closed, the key 162 engages with an engaging portion of the reinforcing member 160L arranged on the rear left inside of the exterior cover 15. When the rear cover 16 is closed, the key 162 restricts the main body 161 from rotating in the opening direction.

[0031] The rear cover 16 includes a restricting member 166, a restricting member 167, a restricting member 168, and a fastener 169 for restricting the rotation of the main body 161 when the rear cover 16 is open, and for maintaining the open state.

[0032] The restricting members 166 and 167 are disposed on the exterior cover side hinge 160a of the hinge 160. The restricting members 166 and 167 are disposed spaced apart in the vertical direction. When the rear cover 16 is opened, the restricting members 166 and 167 restrict further rotation of the main body 161 in the opening direction. Because the restricting members 166 and 167 have the same configuration, only the configuration of the restricting member 166 will be described, and a description of the configuration of the restricting member 167 will be omitted.

[0033] The restricting member 166 includes a wall portion 166a and a wall portion 166b. The wall portion 166a and the wall portion 166b are integrally formed plate material. The wall portion 166a is disposed facing leftward. The wall portion 166a is disposed along the surface of the exterior cover side hinge 160a. In the embodiment, the wall portion 166a is disposed on the surface of the exterior cover side hinge 160a that faces the inner circumferential surface of the exterior cover 15. The rear end portion of the wall portion 166a protrudes rearward from the exterior cover side hinge 160a and the opening / closing axis AX9. The rear end portion of the wall portion 166a is connected to the right end portion of the wall portion 166b. The wall portion 166b is disposed facing rearward. The wall portion 166b is located rearward from the exterior cover side hinge 160a and the opening / closing axis AX9.

[0034] When the rear cover 16 is opened, the wall portion 160b3 of the rear cover side hinge 160b abuts against the left end portion of the wall portion 166b of the restricting member 166. This restricts the rotation of the rear cover side hinge 160b relative to the exterior cover side hinge 160a, and restricts the rotation of the main body portion 161 of the hinge 160 in the closing direction.

[0035] The restricting member 168 is disposed on the exterior cover side hinge 160a of the hinge 160. The restricting member 168 restricts the rotation of the main body 161 in the closing direction when the rear cover 16 is opened. More specifically, when the rear cover 16 is opened, the restricting member 168 engages with the notch 169a of the fastener 169, thereby fixing the position of the restricting member 168 relative to the exterior cover side hinge 160a and restricting the main body 161 of the hinge 160 from rotating in the closing direction.

[0036] Returning to FIG. 1 , the floor plate 17 is a flat surface on which the operator places his or her feet. The floor plate 17 is disposed on the vehicle body 10 of the hydraulic excavator 1. The floor plate 17 is located in front of and below the driver's seat 14 and behind and below the operating unit 13. The floor plate 17 is disposed above the vehicle body frame 11. The height of the floor plate 17 from the ground is, for example, about 50 cm.

[0037] <Supporting member> The support member 20 will be described using FIGS. 10 to 12. FIG. 10 is a side view showing the arrangement of the components arranged below the driver's seat. For the sake of explanation, FIG. 10 illustrates a state in which the battery case 30 located at the front of the drawing has been removed. FIG. 11 is a perspective view showing the arrangement of the components arranged below the driver's seat. FIG. 12 is a perspective view of the support member, the piping / electrical wire bracket, and the filter bracket. In FIGS. 10 and 11, the driver's seat 14 is shown in a state in which the exterior cover 15 has been removed. The support member 20 supports the exterior cover 15 of the hydraulic excavator 1. The support member 20 supports the rear lower part of the driver's seat 14. The support member 20 supports a piping / electrical wire bracket 45 that supports hydraulic piping and electrical wiring such as electrical harnesses, a filter bracket 41 that supports the filter 36, and the like, as shown in FIG. 12. The piping / electrical wire bracket 45, the filter bracket 41, and the like are attached to the first main body portion 211 or the second main body portion 212 of the pipe member 21. The support member 20 is fixed onto the body frame 11, and is located below the upper end portion 15a of the exterior cover 15. The support member 20 includes a pipe member 21, a plate member (third member) 22, and a bracket support member .

[0038] The pipe member 21, together with the plate member 22, constitutes the support member 20. The pipe member 21 has a first main body portion (first member) 211 extending upward from the vehicle body 10 of the hydraulic excavator 1, and a second main body portion (second member) 212 extending rearward from the upper end of the first main body portion 211 via a bent portion 213. When viewed in the left-right direction, the pipe member 21 is an L-shaped pipe material in which the first main body portion 211, the second main body portion 212, and the bent portion 213 are integrally formed. The bent portion 213 connects the upper end of the first main body portion 211 and the front end of the second main body portion 212.

[0039] The first main body portion 211 is connected to the vehicle body frame 11 at the left-right center of the vehicle body 10, rearward of the swing center (swing axis AX1) of the hydraulic excavator 1. The first main body portion 211 extends upward from behind the swing center (swing axis AX1) of the hydraulic excavator 1 at the left-right center of the vehicle body frame 11 of the vehicle body 10. In this embodiment, the first main body portion 211 extends vertically. The first main body portion 211 is located forward of the battery case 30, the hydraulic oil tank 31, the hydraulic pump 32, and the electric motor 33. A lower end of the first main body portion 211 is fixed to the left-right center of the vehicle body frame 11 by a fixing portion 214.

[0040] The second main body portion 212 extends rearward from the center of the vehicle body 10 in the left-right direction. The second main body portion 212 has an upward slope toward the rear to match the slope of the underside of the driver's seat 14 attached to the exterior cover 15. The second main body portion 212 slopes upward from the front to the rear. The second main body portion 212 is located below the upper end portion 15a of the exterior cover 15. The second main body portion 212 connects the upper end portion of the first main body portion 211 and the upper end portion of the main body portion 221 of the plate material 22. The second main body portion 212 is located above the battery case 30, the hydraulic oil tank 31, the hydraulic pump 32, and the electric motor 33.

[0041] The angle between the first body portion 211 and the second body portion 212 is greater than 90°.

[0042] The plate material 22 constitutes the support member 20 together with the pipe member 21. The plate material 22 has a main body portion 221 extending upward from the rear of the vehicle body 10. The main body portion 221 is a plate material. The main body portion 221 is connected to the body frame 11 at the rear of the vehicle body 10, at the center in the left-right direction of the vehicle body 10. The upper end of the main body portion 221 is connected to the rear end of the second main body portion 212 of the pipe material 21. The main body portion 221 is inclined forward above its middle portion in the up-down direction to match the shape of the rear portion of the exterior cover 15. The tank cover 24 is fixed to the main body portion 221. The lower end of the main body portion 221 is fixed to the center in the left-right direction of the vehicle body frame 11 by a fixing portion 222.

[0043] When viewed from the up-down direction, the battery case 30 is disposed to the left of the first main body portion 211 and the second main body portion 212 of the pipe member 21 and the main body portion 221 of the plate material 22, and the hydraulic oil tank 31 (see FIG. 3), the hydraulic pump 32, and the electric motor 33 are located to the right. The hydraulic oil tank 31, the hydraulic pump 32, and the electric motor 33 are located on the opposite side of the battery case 30, sandwiched between the first main body portion 211 and the second main body portion 212 of the pipe member 21 and the main body portion 221 of the plate material 22.

[0044] When viewed from the left and right, the assembled pipe member 21 and plate member 22 form a U-shape that is open downward.

[0045] The upper end of the main body 221 of the plate material 22 is provided with a driver's seat support part 23 that supports the rear lower part of the driver's seat 14. The driver's seat support part 23 is fixed by a fastening member to an attachment part 223 that is provided at the upper end of the main body 221 of the plate material 22 and is parallel to the horizontal direction.

[0046] The bracket support member 26 is a support member for attaching various brackets to the pipe member 21. The bracket support member 26 is fixed to the first main body portion 211 of the pipe member 21.

[0047] The driver's seat support portion 23 will be described using Figures 5 and 11. The driver's seat support portion 23 includes a wall portion 231, a wall portion 232, and a locking portion 233. When viewed in the left-right direction, the wall portion 231 and the wall portion 232 are integrally formed to form an L-shape. The wall portion 231 is a plate member arranged at a slight incline with respect to the horizontal direction. The wall portion 232 is a plate member parallel to the vertical direction. The locking portion 233 is arranged to protrude forward from the wall portion 232. When viewed in the up-down direction, the locking portion 233 is a U-shaped rod member. Ends on both sides of the locking portion 233 are fixed to the wall portion 232. The upper rear portion of the exterior cover 15 is fixed to the wall portion 232. The wall portion 231 is fixed to the mounting portion 223 of the plate member 22 by a fastening member.

[0048] A hook member (not shown) provided on the lower rear side of the driver's seat 14 is engaged with the engaging portion 233. When removing the driver's seat 14, a maintenance worker inserts his / her hand between the driver's seat 14 and the engaging portion 233 through a cutout portion 15s (see FIG. 14) provided on the upper rear side of the exterior cover 15, releases the engagement of the hook member with the engaging portion 233, and lifts the driver's seat 14 upward to remove it.

[0049] As described above, a cutout 15s is provided in the rear center of the upper end 15a of the exterior cover 15. To prevent water from entering the exterior cover 15 from anywhere other than the cutout 15s, a wall 15b is provided around the cutout 15s of the exterior cover 15, and a water-stopping member 25 is provided to prevent water that has entered through the cutout 15s from splashing onto the battery.

[0050] 13 and 14, the wall portion 15b arranged around the cutout portion 15s of the exterior cover 15 will be described. FIG. 13 is a front view of the water-stopping member. FIG. 14 is a perspective view showing the opening at the upper end of the exterior cover. The wall portion 15b is arranged at the rear of the upper end portion 15a. The wall portions 15b are arranged on the left and right sides of the cutout portion 15s. The wall portions 15b are inclined downward from the inside to the outside of the opening S1.

[0051] The rear upper portion 15c of the exterior cover 15, which is connected to the wall portion 15b, has a sloped surface that slopes downward from the connection portion with the wall portion 15b toward the outside. Furthermore, a wall portion 15d is connected to the rear end of the rear upper portion 15c. The wall portion 15d has a sloped surface that slopes downward from the connection portion with the rear upper portion 15c toward the rear. The wall portion 15d is composed of a wall portion 15d1, a wall portion 15d2, and a wall portion 15d3. The wall portions 15d1, 15d2, and 15d3 have sloped surfaces with different slopes. The upper end of the wall portion 15d1 is connected to the rear end of the rear upper portion 15c. The lower end of the wall portion 15d1 is connected to the upper end of the wall portion 15d2. The lower end of the wall portion 15d2 is connected to the upper end of the wall portion 15d3. The inclination of the wall portion 15d2 is gentler than the inclination of the wall portion 15d1 and the wall portion 15d3.

[0052] At the upper rear of the exterior cover 15, the wall portion 15b and the upper rear portion 15c prevent water from flowing down toward the outside of the exterior cover 15. Furthermore, the first seal member 150a and the second seal member 150b, which are disposed on the periphery of the opening S2, are slightly inclined downward from the center toward the sides at the top of the opening S2. As a result, water flowing down from the upper rear portion 15c along the wall portion 15d toward the opening S2 flows toward the sides along the inclination of the first seal member 150a and the second seal member 150b. In this way, water is prevented from entering the inside of the exterior cover 15 through the opening S2.

[0053] The water-stopping member 25 will be described using Figures 5 and 13. The water-stopping member 25 is attached to the exterior cover 15 while contacting the driver's seat support portion 23. The water-stopping member 25 is arranged inside the exterior cover 15. The water-stopping member 25 is a member that prevents water from entering through a gap between the inner circumferential surface of the exterior cover 15 and the battery case 30 around the driver's seat support portion 23. The water-stopping member 25 prevents water from entering from the outside of the exterior cover 15 toward the battery case 30 through a gap between the inner circumferential surface of the exterior cover 15 and the battery case 30. The water-stopping member 25 is made of an elastically deformable material such as rubber that can fill the gap between the inner circumferential surface of the exterior cover 15 and the battery case 30.

[0054] <Other parts inside the exterior cover> In addition to the support member 20, the exterior cover 15 accommodates a battery case 30, a hydraulic oil tank 31, a hydraulic pump 32, an electric motor 33, and a swing motor (not shown).

[0055] The battery stored in the battery case 30 is the power source for the hydraulic excavator 1. The battery case 30 is a case that detachably houses a rechargeable battery that is detachable from the vehicle body 10. The battery is charged by an AC power source while removed from the vehicle body 10. The battery is, for example, a nickel-metal hydride battery or a lithium-ion battery. The weight of the battery case 30 including the battery stored therein is, for example, approximately 10 kg to 20 kg.

[0056] The battery case 30 is disposed below the driver's seat 14 of the hydraulic excavator 1. The battery case 30 is disposed on the other left-right side of the vehicle body 10. In the embodiment, the battery case 30 is disposed to the rear left of the vehicle body 10. In a top view, the battery case 30 is disposed on one left-right side of the second member. In the embodiment, the battery case 30 is disposed to the left of the pipe member 21 of the support member 20. The battery housed in the battery case 30 can be attached and detached with the rear cover 16 open. The battery housed in the battery case 30 can be attached and detached to and from the vehicle body 10.

[0057] When assembling the hydraulic excavator 1, such a battery case 30 is assembled onto the vehicle body frame 11 in a state where it is tilted obliquely from the upper left so as not to interfere with the support member 20, with the support member 20 assembled to the vehicle body frame 11.

[0058] The hydraulic oil tank 31 is a tank for hydraulic oil for the hydraulic excavator 1. A hydraulic pump 32 is disposed inside the hydraulic oil tank 31. The hydraulic oil tank 31 is disposed next to the rear of the battery case 30 in the left-right direction of the vehicle body 10. The hydraulic oil tank 31 is disposed on the vehicle body frame 11. In this embodiment, the hydraulic oil tank 31 is disposed on the right side of the vehicle body 10 in the left-right direction. In this embodiment, the hydraulic oil tank 31 is disposed to the rear right of the vehicle body 10. The hydraulic oil tank 31 is disposed to the right of the support member 20. A tank cover 24 is disposed to the rear left of the hydraulic oil tank 31.

[0059] The tank cover 24 is disposed inside the exterior cover between the rear end of the hydraulic oil tank 31 and the rear end of the battery. The hydraulic oil tank 31 and the tank cover 24 are disposed on the side of the vehicle body 10 where the hinge 160 is disposed, that is, at the rear end of the interior of the right exterior cover in this embodiment.

[0060] The hydraulic pump 32 supplies hydraulic oil for operating the work equipment 12 of the hydraulic excavator 1. The hydraulic pump 32 is connected to a hydraulic oil tank 31 and an electric motor 33. The hydraulic oil discharged from the hydraulic pump 32 is supplied to an actuator (not shown) that drives the work equipment 12 and the like via hydraulic piping (not shown). The hydraulic pump 32 is disposed on the right side of the vehicle body 10, inside the hydraulic oil tank 31. The hydraulic pump 32 is disposed on the right side of the vehicle body 10 in the left-right direction. The hydraulic pump 32 is disposed on the vehicle body frame 11.

[0061] The electric motor 33 is a power source for the hydraulic excavator 1. The electric motor 33 supplies power for driving the hydraulic excavator 1. The electric motor 33 is driven by electricity supplied from a battery housed in the battery case 30. The electric motor 33 drives the hydraulic pump 32 and the like. The electric motor 33 is disposed on the right side of the vehicle body 10, in front of the hydraulic oil tank 31. The electric motor 33 is disposed to the right of the support member 20. The electric motor 33 is disposed on the vehicle body frame 11.

[0062] The swing motor is a motor for swinging that generates a driving force for swinging the swing body of the hydraulic excavator 1. The swing motor is driven by hydraulic oil discharged from the hydraulic pump 32.

[0063] <Effects> As described above, in the embodiment, the exterior cover 15 can be supported at the left-right central portion of the vehicle body 10 by the pipe member 21 including the first main body portion 211 extending upward from behind the center of rotation and the second main body portion 212 extending rearward from the upper end of the first main body portion 211, and the plate member 22 extending upward from the rear of the vehicle body. According to the embodiment, in the small hydraulic excavator 1, various components can be appropriately arranged in the limited space below the operator's seat 14.

[0064] In the embodiment, the angle between the first main body portion 211 and the second main body portion 212 of the pipe member 21 is greater than 90°. According to the embodiment, various components can be appropriately arranged in the limited space below the driver's seat 14 without wasting space.

[0065] In the embodiment, the upper end of the plate member 22 is provided with a driver's seat support portion 23 that supports the rear lower portion of the driver's seat 14. According to the embodiment, the support member 20 can support the exterior cover 15 as well as the driver's seat 14.

[0066] In the embodiment, the battery case 30 is disposed on the rear left side of the vehicle body 10. In the embodiment, the water blocking member 25 can prevent water from entering through a gap between the inner circumferential surface of the upper rear part of the exterior cover 15 and the battery case 30.

[0067] Moreover, in the embodiment, the wall portion 15b and the upper rear portion 15c at the upper rear of the exterior cover 15 allow water to flow down toward the outside of the exterior cover 15. Furthermore, in the embodiment, the first seal member 150a and the second seal member 150b arranged on the periphery of the opening S2 are slightly inclined downward from the center toward the sides at the top of the opening S2. This allows water flowing down from the upper rear portion 15c along the wall portion 15d toward the opening S2 to flow toward the sides along the inclination of the first seal member 150a and the second seal member 150b. In this way, the embodiment can prevent water from entering the inside of the exterior cover 15 through the opening S2. According to the embodiment, water can be prevented from entering the inside of the exterior cover 15.

[0068] <Modification> In the above description, the pipe member 21 has been described as having an L-shape in left-right view, with the first main body portion 211, which is the first member, and the second main body portion 212, which is the second member, being integrally formed, but is not limited thereto. The first member and the second member may be separate members. In this case, the upper end of the first member and the front end of the second member are connected. [Explanation of symbols]

[0069] 1...hydraulic excavator, 10...body, 11...body frame, 12...working equipment, 121...blade, 13...operating unit, 14...driver's seat, 15...exterior cover, 150...sealing member, 16...rear cover, 160...hinge, 17...floor plate, 18...track, 20...support member, 21...pipe member, 211...first main body portion (first member), 212...second main body portion (second member), 213...bent portion, 214...fixing portion, 2 2...plate material (third member), 221...main body portion, 222...fixing portion, 223...mounting portion, 23...driver's seat support portion, 231...wall portion, 232...wall portion, 233...locking portion, 24...tank cover, 25...waterstop member, 30...battery case, 31...hydraulic oil tank, 32...hydraulic pump, 33...electric motor, 41...filter bracket, 45...piping / electric wire bracket, AX1...swivel axis (swivel center), AX9...opening / closing axis.

Claims

1. a first member extending upward and rearward of a turning center of the body frame; a third member extending upward from the rear of the vehicle body frame; a second member connecting upper ends of the first member and the third member; a battery; The battery is disposed on one side of the second member in the left-right direction when viewed from above. Work machinery.

2. The first member and the second member are integrally formed pipe members.

2. The work machine according to claim 1.

3. The third member is a plate material.

2. The work machine according to claim 1.

4. a piping bracket attached to the first member or the second member; a filter bracket attached to the first member or the second member; Equipped with The piping bracket supports hydraulic piping and an electrical harness, The filter bracket supports the filter.

2. The work machine according to claim 1.

5. the angle between the first and second parts of the pipe member is greater than 90°; 3. The work machine according to claim 2.

6. a driver's seat support portion at an upper end of the third member, the driver's seat support portion supporting a rear lower portion of the driver's seat; The work machine of claim 1 , comprising:

7. an exterior cover disposed above the body frame; a battery disposed inside the exterior cover; The work machine of claim 1 , comprising:

8. the work machine is a battery-powered hydraulic excavator, 2. The work machine according to claim 1.

9. a waterproof member interposed between a battery case accommodating the battery and an exterior cover; 8. The work machine of claim 7, comprising:

10. The battery is a removable battery.

8. The work machine according to claim 7.

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