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 hydraulic pipes through which the hydraulic oil flows, the hydraulic pipes include the discharge pipe 51 and the discharge pipe 52 that discharge the hydraulic oil from the hydraulic oil tank 31 to the hydraulic valve disposed in front of the operator's seat 14, and the return pipe 53 that returns the hydraulic oil from the hydraulic valve to the hydraulic oil tank 31, and the discharge pipe 51, the discharge pipe 52, and the return pipe 53 are disposed below the operator's seat 14 in the vertical direction and above the battery, the hydraulic oil tank 31, and the electric motor 33 in the vertical direction.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] In a work vehicle, a technique is known in which hydraulic piping is arranged to avoid the travel transmission mechanism, the electric mechanism for driving the work machine, the work machine, etc. by effectively utilizing the space within the vehicle frame (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-315655 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 hydraulic piping through which hydraulic oil flows, the hydraulic piping comprising a discharge piping that discharges the hydraulic oil from a hydraulic oil tank to a hydraulic valve located in front of a driver's seat, and a return piping that returns the hydraulic oil from the hydraulic valve to the hydraulic oil tank, the discharge piping and the return piping being located below the driver's seat in the vertical direction and above a battery, a hydraulic oil tank, and an electric motor in the vertical direction. [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 perspective view showing the arrangement of the members arranged below the driver's seat. [Figure 4] FIG. 4 is a perspective view of the piping / electric wire bracket and the support member as viewed from the left front. [Figure 5] FIG. 5 is a plan view showing the arrangement of the members arranged below the driver's seat. [Figure 6] FIG. 6 is a perspective view of the hydraulic piping and the support member as viewed from the left front. 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. 3), 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. 3). 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 rear cover 16 can be opened and closed 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 vertical and horizontal directions. In the closed state, the rear cover 16 closes the rear opening S2 of the exterior cover 15. The lower end of the rear cover 16 is located at approximately the same height as the floor plate 17.

[0018] The rear cover 16 opens from left to right about an opening / closing axis AX9 located on the rear right side of the exterior cover 15. The rear cover 16 rotates approximately 90 degrees about the opening / closing axis AX9. When the rear cover 16 is in the open state, the handle of the battery housed in the battery case 30 is exposed, making it possible to attach and detach the battery housed in the battery case 30.

[0019] The floor plate 17 is a flat surface on which the operator places his / 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.

[0020] <Supporting member> The support member 20 will be described with reference to Figures 3 and 4. Figure 3 is a perspective view showing the arrangement of the various members arranged below the operator's seat. Figure 4 is a perspective view of the piping / electrical wire bracket and the support member as seen from the left front. Figure 3 shows the operator's seat 14 removed from the exterior cover 15. 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 operator's seat 14. The support member 20 is fixed with components such as a piping / electrical wire bracket 45 that supports hydraulic piping and electrical wiring 61 such as an electrical harness. The support member 20 is fixed onto the body frame 11 and is located below the upper end 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 26.

[0021] 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 member 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.

[0022] The first main body portion 211 extends upward from behind the rotation axis AX1 (see FIG. 5 ), which is the rotation center of the hydraulic excavator 1, in the center of the vehicle body 10 in the left-right direction. 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 portion of the first main body portion 211 is fixed to the vehicle body frame 11 by a fixing portion 214.

[0023] 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 is located above the battery case 30, the hydraulic oil tank 31, the hydraulic pump 32, and the electric motor 33.

[0024] The angle between the first body portion 211 and the second body portion 212 is greater than 90°.

[0025] 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 upper end of the main body portion 221 is connected to the rear end of the second main body portion 212 of the pipe member 21. The main body portion 221 is inclined forward above the middle portion in the vertical direction to match the shape of the rear portion of the exterior cover 15. A tank cover (not shown) is fixed to the main body portion 221. The lower end of the main body portion 221 is fixed to the vehicle body frame 11 by a fixing portion 222.

[0026] 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. 5), 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.

[0027] When viewed from the left and right, the assembled pipe member 21 and plate member 22 form a U-shape that is open downward.

[0028] 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.

[0029] The bracket support member 26 is a support member for attaching various brackets to the pipe member 21. In this embodiment, the bracket support member 26 attaches a filter bracket 41 and a piping / electric wire bracket 45 (described later) to the pipe member 21. The bracket support member 26 is fixed to the first main body portion 211 of the pipe member 21.

[0030] <Inside the exterior cover> Other members inside the exterior cover 15 will be described using Figures 3 and 5. Figure 5 is a plan view showing the arrangement of the members arranged below the driver's seat. In addition to the support member 20, the interior of the exterior cover 15 accommodates a battery case 30, a hydraulic oil tank 31, a hydraulic pump 32, an electric motor 33, a swing motor 35, a filter 36, and the like.

[0031] 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.

[0032] 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.

[0033] 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 is disposed to the rear left of the hydraulic oil tank 31.

[0034] 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.

[0035] 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.

[0036] The swing motor 35 is a motor for swinging that generates a driving force for swinging the swing body of the hydraulic excavator 1. The swing motor 35 is driven by hydraulic oil discharged from the hydraulic pump 32. The swing motor 35 is disposed on the front left of the vehicle body 10. The swing motor 35 is disposed on the front left of the support member 20. The swing motor 35 is disposed below the filter 36.

[0037] The filter 36 filters the hydraulic oil returning to the hydraulic oil tank 31. The filter 36 is provided on a return pipe 53, which is a pipe for returning hydraulic oil from a hydraulic valve (not shown) located in front of the operator's seat 14 of the hydraulic excavator 1 to the hydraulic oil tank 31. The hydraulic valve is located in front of the filter 36.

[0038] The filter 36 is disposed forward of the support member 20 that supports the exterior cover 15. The filter 36 is disposed forward and left of the bent portion 213 of the pipe member 21. The filter 36 is disposed rearward of the rotation axis AX1, which is the center of rotation of the hydraulic excavator 1. The filter 36 is disposed forward of the battery case 30, the hydraulic oil tank 31, and the electric motor 33. The filter 36 is disposed front and left of the vehicle body 10. The filter 36 is disposed above the rotation motor 35. The filter 36 is disposed below the operator's seat 14 and below the upper end portion 15a of the exterior cover 15. No other members are disposed above the filter 36 within the exterior cover 15. When the operator's seat 14 is removed from the exterior cover 15 as shown in FIG. 5 , the filter 36 is entirely exposed from the opening S1 of the exterior cover 15.

[0039] The axis AX2 (see FIG. 5) of the filter 36 is disposed in a horizontal plane. The axis AX2 of the filter 36 is inclined with respect to the left-right direction. The axis AX2 of the filter 36 is inclined rearward as it moves from right to left. Because the axis AX2 is disposed in a horizontal plane, when replacing the filter 36, the filter 36 can be lifted and removed from inside the exterior cover 15 with the driver's seat 14 removed from the exterior cover 15.

[0040] The filter 36 is disposed on the pipe member 21 of the support member 20 via a filter bracket 41. The filter 36 is disposed on the front left side of the bent portion 213 via the filter bracket 41.

[0041] The filter bracket 41 is a bracket for attaching the filter 36 to the support member 20. The filter bracket 41 is fixed to the first main body portion 211 of the pipe member 21 of the support member 20 via the bracket support member 26.

[0042] <Hydraulic piping> The hydraulic piping will be described with reference to Figures 4 and 6. Figure 6 is a perspective view of the hydraulic piping and support member as viewed from the left front. The hydraulic piping is piping through which hydraulic oil of the hydraulic excavator 1 flows. In this embodiment, the hydraulic piping refers to two discharge pipes, discharge pipe 51 and discharge pipe 52, and return pipe 53 for return.

[0043] The discharge pipes 51 and 52 are pipes that discharge the hydraulic oil from the hydraulic oil tank 31 (see FIG. 5) to a hydraulic valve (not shown) that is disposed in front of the driver's seat 14.

[0044] The return pipe 53 is a pipe that returns hydraulic oil from the hydraulic valve to the hydraulic oil tank 31 (see FIG. 5). The return pipe 53 is arranged along the second main body portion 212 of the pipe member 21 of the support member 20 that supports the exterior cover 15, via a bracket 45 for piping and electric wires.

[0045] The discharge pipe 51, the discharge pipe 52, and the return pipe 53 are arranged below the driver's seat 14 and above the battery case 30, the hydraulic oil tank 31, the hydraulic pump 32, and the electric motor 33. The discharge pipe 51, the discharge pipe 52, and the return pipe 53 are arranged below the upper end of the exterior cover 15. The discharge pipe 51, the discharge pipe 52, and the return pipe 53 are attached to the pipe member 21 of the support member 20 that supports the exterior cover 15 via a bracket 45 for piping and electric wires.

[0046] <Piping and wire brackets> 4 and 6, the piping and electric wire bracket 45 will be described. The piping and electric wire bracket 45 is a bracket for hydraulic piping and electric wiring 61 such as an electrical harness. The piping and electric wire bracket 45 is a bracket for fixing the discharge piping 51, the discharge piping 52, and the return piping 53. The piping and electric wire bracket 45 is formed in a stepped shape. The piping and electric wire bracket 45 includes an upper step portion 451a, a middle step portion 451c, a lower step portion 451e, a connecting portion 451b connecting the upper step portion 451a and the middle step portion 451c, and a connecting portion 451d connecting the middle step portion 451c and the lower step portion 451e.

[0047] The upper stage portion 451a, the middle stage portion 451c, and the lower stage portion 451e are arranged in a staggered plane with an upward-facing surface. The upper stage portion 451a, the middle stage portion 451c, and the lower stage portion 451e are arranged in a stepped manner that increases in height from the front to the rear in the front-to-rear direction along the pipe member 21 of the support member 20. The upper stage portion 451a, the middle stage portion 451c, and the lower stage portion 451e are arranged on opposite sides in the left-right direction of the filter 36 that filters the hydraulic oil, with the pipe member 21 of the support member 20 sandwiched therebetween.

[0048] The upper step portion 451a is arranged along the second main body portion 212 to the right of the second main body portion 212 of the pipe member 21. The upper step portion 451a is fixed along the second main body portion 212 via a bracket support member (not shown) fixed to the right of the second main body portion 212 of the pipe member 21. The middle step portion 451c is located forward and below the upper step portion 451a. The middle step portion 451c is located to the right of the bent portion 213 of the pipe member 21. The lower step portion 451e is fixed to the first main body portion 211 of the pipe member 21 of the support member 20 via a bracket support member 26. The lower step portion 451e is located forward and below the middle step portion 451c. The lower step portion 451e is arranged in front of the first main body portion 211 of the pipe member 21. The connecting portions 451b and 451d have surfaces facing forward.

[0049] The upper stage portion 451a is provided with a return pipe holding portion 452 that holds the return pipe 53 of the hydraulic pipes.

[0050] The return pipe holding portion 452 holds the return pipe 53 on the second main body portion 212 of the pipe member 21. When viewed in the vertical direction, the return pipe holding portion 452 is located on the second main body portion 212 of the pipe member 21. When viewed in the vertical direction, the return pipe holding portion 452 is located to the left of the discharge pipe holding portion 453.

[0051] The middle section 451c is provided with a discharge pipe holding section 453 that holds the discharge pipes 51 and 52 of the hydraulic pipes, and an electrical wiring holding section 454 that holds various electrical wiring 61 that is connected to various electrical components of the hydraulic excavator 1.

[0052] The discharge pipe holding portion 453 and the electrical wiring holding portion 454 are arranged on the middle stage portion 451c, spaced apart in the left-right direction. The discharge pipe holding portion 453 holds the discharge pipe 51 and the discharge pipe 52 to the right of the bent portion 213 of the pipe member 21. The electrical wiring holding portion 454 holds the electrical wiring 61 to the right of the bent portion 213 of the pipe member 21, to the right of the discharge pipe holding portion 453. In the embodiment, on the middle stage portion 451c, the discharge pipe holding portion 453 is arranged on the left, and the electrical wiring holding portion 454 is arranged on the right. The discharge pipe 51 and the discharge pipe 52 are held by the discharge pipe holding portion 453, and the electrical wiring 61 is held by the electrical wiring holding portion 454.

[0053] In this way, the discharge pipes 51 and 52 are held in the discharge pipe holding portion 453, the return pipe 53 is held in the return pipe holding portion 452, and the various electrical wiring 61 is held in the electrical wiring holding portion 454. The hydraulic pipes, which are the discharge pipes 51 and 52 and the return pipes 53, are arranged on the piping / electrical wire bracket 45, separated in the left-right direction from the electrical wiring 61 connected to the various electrical components. The hydraulic pipes and the electrical wiring 61 are routed separated in the left-right direction in the space below the driver's seat 14.

[0054] The discharge pipe 51 and the discharge pipe 52 are held in the discharge pipe holding portion 453, and the return pipe 53 is held in the return pipe holding portion 452. As a result, the discharge pipe 51 and the discharge pipe 52 and the return pipe 53 are arranged separately in the left and right direction on the pipe / electric wire bracket 45. The discharge pipe 51 and the discharge pipe 52 and the return pipe 53 are routed separately to the left and right in the space below the driver's seat 14.

[0055] <Effects> As described above, in the embodiment, the discharge pipe 51, the discharge pipe 52, and the return pipe 53 can be arranged below the operator's seat 14 and above the battery case 30, the hydraulic oil tank 31, the hydraulic pump 32, and the electric motor 33. 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.

[0056] In the embodiment, the discharge pipe 51, the discharge pipe 52, and the return pipe 53 can be attached to the pipe member 21 of the support member 20 that supports the exterior cover 15 via a stepped bracket 45 for piping and electric wires. According to the embodiment, it is possible to prevent the positions of the discharge pipe 51, the discharge pipe 52, and the return pipe 53 from shifting. According to the embodiment, in the small hydraulic excavator 1, it is possible to appropriately arrange various components in the limited space below the operator's seat 14.

[0057] In the embodiment, the return pipe 53 can be arranged along the second body portion 212 extending rearward from the upper end portion of the first body portion 211 via the bent portion 213. 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.

[0058] According to the embodiment, the discharge pipes 51 and 52 are held in the discharge pipe holding portion 453, and the electric wiring 61 is held in the electric wiring holding portion 454, so that the hydraulic pipes and the electric wiring 61 can be routed separately to the left and right in the space below the driver's seat 14. According to the embodiment, it is possible to prevent the hydraulic pipes and the electric wiring 61 from being mixed in the limited space below the driver's seat 14.

[0059] According to the embodiment, the discharge pipe 51 and the discharge pipe 52 are held in the discharge pipe holding portion 453, and the return pipe 53 is held in the return pipe holding portion 452, so that the discharge pipe 51 and the discharge pipe 52 and the return pipe 53 can be routed separately to the left and right in the space below the driver's seat 14. According to the embodiment, it is possible to prevent the discharge pipe 51 and the discharge pipe 52 and the return pipe 53 from being mixed in the limited space below the driver's seat 14. [Explanation of symbols]

[0060] 1...hydraulic excavator, 10...body, 11...body frame, 12...working machine, 121...blade, 13...operating unit, 14...driver's seat, 15...exterior cover, 17...floor plate, 18...track, 20...support member, 21...pipe member, 211...first main body portion, 212...second main body portion, 213...bent portion, 214...fixing portion, 22...plate material, 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, 30... Battery case, 31... hydraulic oil tank, 32... hydraulic pump, 33... electric motor, 35... swing motor, 36... filter, 45... bracket for piping and electric wires, 451a... upper section, 451b... connection section, 451c... middle section, 451d... connection section, 451e... lower section, 452... return pipe holding section, 453... discharge pipe holding section, 454... electric wiring holding section, 51... discharge pipe (hydraulic pipe), 52... discharge pipe (hydraulic pipe), 53... return pipe (hydraulic pipe), 61... electric wiring.

Claims

1. Hydraulic piping through which hydraulic oil flows; The hydraulic piping includes: a discharge pipe for discharging hydraulic oil from the hydraulic oil tank to a hydraulic valve disposed in front of the driver's seat; a return pipe for returning hydraulic oil from the hydraulic valve to the hydraulic oil tank; Equipped with The discharge pipe and the return pipe are arranged below the driver's seat in the vertical direction and above the battery, the hydraulic oil tank, and the electric motor in the vertical direction. Work machinery.

2. the discharge pipe and the return pipe are attached to a support member that supports an exterior cover of the work machine via a piping / electric wire bracket that fixes the discharge pipe and the return pipe to electrical wiring, 2. The work machine according to claim 1.

3. The return pipe is arranged along the support member via the pipe / electric wire bracket.

3. The work machine according to claim 2.

4. The discharge pipe and the return pipe are arranged on the pipe / electric wire bracket separately in the left and right direction from the electrical wiring connected to various electrical components.

3. The work machine according to claim 2.

5. The discharge pipe and the return pipe are arranged separately in the left and right direction on the piping / electric wire bracket.

4. The work machine according to claim 3.

6. The piping and electric wire bracket is an upper stage portion in which a return pipe holding portion for holding a return pipe of the hydraulic pipe is disposed; a middle section located below the upper section and including a discharge pipe holding section for holding a discharge pipe of the hydraulic pipes; a lower section located below the middle section; Equipped with 4. The work machine according to claim 3.

7. an exterior cover disposed above the body frame; a support member disposed inside the exterior cover; a removable battery disposed inside the exterior cover; a hydraulic oil tank disposed inside the exterior cover; a hydraulic pump disposed inside the exterior cover; an electric motor 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.

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