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, which is a work machine, includes a filter that is disposed in front of the support member 20, which supports the exterior cover 15 of the hydraulic excavator 1, in the front-rear direction, behind the swing AX1 (swing shaft center) of the hydraulic excavator 1 in the front-rear direction, in front of the battery, the hydraulic pressure pump 32, and the electric motor 33 in the front-rear direction, and below the operator's seat in the up-down direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] BACKGROUND ART In a work vehicle, a technique is known for simplifying and shortening the hydraulic system from a hydraulic source to each hydraulic device as much as possible (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-077959 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 including a filter that is arranged forward in the longitudinal direction of a support member that supports an exterior cover of the work machine, rearward in the longitudinal direction of the center of rotation of the work machine, forward in the longitudinal direction of the battery, hydraulic pump, and electric motor, and vertically below the driver's seat. [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 plan view showing the arrangement of the members arranged below the driver's seat. [Figure 5] FIG. 5 is a perspective view of the filter and the filter bracket. [Figure 6] FIG. 6 is a plan view of the filter bracket. [Figure 7] FIG. 7 is a perspective view of the filter bracket. 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. 4), 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] 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.

[0020] <Supporting member> The support member 20 will be described with reference to Figures 3 and 7. Figure 3 is a perspective view showing the arrangement of the various components arranged below the driver's seat. Figure 7 is a perspective view of the filter bracket. In Figure 3, the driver's seat 14 is removed from the exterior cover 15. For the sake of explanation, Figure 7 shows the filter 36 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 an electrical harness, a filter bracket 41 that supports the filter 36, and the like. 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 center of rotation (rotation axis AX1) of the hydraulic excavator 1 in the left-right center 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 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. 4), 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 the filter bracket 41 and the piping / electric wire bracket 45 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] <Other parts inside the exterior cover> Other members inside the exterior cover will be described using Figures 3 and 4. Figure 4 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 in a hydraulic pipe 53 (see FIG. 3 ) that 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 swing axis AX1 (see FIG. 4), which is the swing center of the hydraulic excavator 1. The filter 36 is disposed forward of the battery case 30, the hydraulic pump 32, 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 swing 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. 4, the filter 36 is entirely exposed from the opening S1 of the exterior cover 15.

[0039] Within the filter 36, the center axis AX2 of the filter 36 is disposed in a horizontal plane. The center axis AX2 of the filter 36 is inclined with respect to the left-right direction. The center axis AX2 of the filter 36 is inclined rearward as it moves from right to left. Because the center 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 will be described using Figures 5 to 7. Figure 5 is a perspective view of the filter and the filter bracket. Figure 6 is a plan view of the filter bracket. For the sake of explanation, Figure 6 shows a state in which the filter 36 has been removed. The filter bracket 41 is a bracket for attaching the filter 36 to the support member 20. The filter bracket 41 is attached to the first main body portion 211 of the pipe member 21 of the support member 20 via the bracket support member 26. The filter bracket 41 has a hydraulic oil receiving portion 411 located below the filter 36.

[0042] The hydraulic oil receiving portion 411 is a tray that receives hydraulic oil dripping from the filter 36 when, for example, replacing the filter 36. The hydraulic oil receiving portion 411 is a rectangular plate that is slightly inclined by several degrees relative to the horizontal plane.

[0043] The hydraulic oil receiving portion 411 is provided with a hydraulic oil drain hole 415 for draining hydraulic oil that has dripped from the filter 36, and an oil drain pipe 419 for discharging the hydraulic oil from the hole 415 to the outside of the hydraulic excavator 1. The surface of the hydraulic oil receiving portion 411 is inclined downward toward the hole 415 to make it easier to drain the hydraulic oil.

[0044] Walls 412, 413, 414, and 417 extend upward from the four peripheral edges of the hydraulic oil receiving portion 411. In other words, the lower ends of walls 412, 413, 414, and 417 are connected to the four peripheral edges of the hydraulic oil receiving portion 411. Walls 412 and 413 face each other, and walls 414 and 417 face each other. Wall 418 is disposed at the lower end of wall 417, extending toward the opposite side from the hydraulic oil receiving portion 411. Walls 417 and 418 are integrally formed to form an L-shape. Wall 418 is attached to the first main body portion 211 of pipe member 21 via bracket support member 26.

[0045] <Effects> As described above, in the embodiment, the filter 36 can be disposed forward of the support member 20 that supports the exterior cover 15, rearward of the rotation center (rotation axis AX1), forward of the battery case 30, the hydraulic pump 32, and the electric motor 33, below the driver's seat 14, and below the upper end portion 15a of the exterior cover 15. According to the embodiment, the filter 36 can be disposed in the limited space below the driver's seat 14. In this way, according to the embodiment, various components can be appropriately disposed in the limited space below the driver's seat 14.

[0046] In the embodiment, the central axis AX2 of the filter 36 is disposed in a horizontal plane. According to the embodiment, the filter 36 is exposed when the driver's seat 14 is removed from the exterior cover 15, and therefore the filter 36 can be lifted and removed from inside the exterior cover 15. According to the embodiment, the replacement work of the filter 36 can be simplified.

[0047] In the embodiment, the hydraulic oil receiving portion 411 can receive the hydraulic oil that drips when replacing the filter 36. According to the embodiment, the dirt on the inside of the vehicle body 10 due to the hydraulic oil that drips when replacing the filter 36 can be reduced.

[0048] In the embodiment, the hydraulic oil dripping into the hydraulic oil receiving portion 411 can be discharged from the hole 415 to the outside of the vehicle through the oil drain pipe 419. In the embodiment, the work of recovering the hydraulic oil accumulated in the hydraulic oil receiving portion 411 can be reduced.

[0049] In the embodiment, the filter 36 can be fixed to the support member 20 that supports the exterior cover 15 via the filter bracket 41. According to the embodiment, the filter 36 can be appropriately positioned in the limited space under the driver's seat 14 using the support member 20. [Explanation of symbols]

[0050] 1...hydraulic excavator, 10...body, 11...body frame, 12...working equipment, 121...blade, 13...operating unit, 14...driver's seat, 15...exterior cover, 16...rear cover, 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, 22...plate material (third member), 221...main body portion, 222...fixing part, 223...mounting part, 23...driver's seat support part, 30...battery case, 31...hydraulic oil tank, 32...hydraulic pump, 33...electric motor, 35...swing motor, 36...filter, 41...filter bracket, 411...hydraulic oil receiving part, 412...wall part, 413...wall part, 414...wall part, 415...hole, 419...oil drain piping, 45...bracket for piping and electric wires, AX1...swing axis (swing center), AX2...central axis, AX9...opening / closing axis.

Claims

1. a filter that is disposed forward in the longitudinal direction of a support member that supports an exterior cover of the work machine, rearward in the longitudinal direction of the center of rotation of the work machine, forward in the longitudinal direction of the battery, hydraulic pump, and electric motor, and vertically below the driver's seat; A work machine comprising:

2. The central axis of the filter is disposed in a horizontal plane.

2. The work machine according to claim 1.

3. a filter bracket for attaching the filter to the support member; Equipped with The filter bracket includes a hydraulic oil receiving portion located below the filter in the up-down direction; The work machine of claim 1 , comprising:

4. The hydraulic oil receiving portion includes a hole for draining hydraulic oil, and an oil drain pipe for draining hydraulic oil from the hole to the outside of the work machine.

4. The work machine according to claim 3.

5. an exterior cover disposed above the body frame; a removable battery 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:

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

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