electric work vehicle

Abstract

This makes it possible to improve driver comfort in electric work vehicles. [Solution] The electric work vehicle 10 comprises a vehicle body 11, a driver's seat 31 mounted on the vehicle body 11, running wheels 12B positioned on the left and right sides of the driver's seat 31 in a top view and supporting the vehicle body 31 so that it can move, a battery 26 mounted on the vehicle body 11, and an electric motor 42 supplied with power from the battery 26, the electric motor 42 being positioned above the running wheels 12B.

Description

Technical Field

[0001] The present disclosure relates to an electric work vehicle.

Background Art

[0002] Patent Document 1 discloses an electric work vehicle (electric tractor) that travels and performs predetermined work by driving an electric motor. This electric work vehicle includes a battery and an electric motor supplied with electric power from the battery. The electric motor includes a traveling electric motor that drives traveling wheels and a working electric motor that drives a hydraulic pump for supplying hydraulic oil to a working device that operates hydraulically. In Patent Document 1, the traveling electric motor is mounted at the front of the electric work vehicle or below the driver's seat on the electric work vehicle. On the other hand, the working electric motor is arranged below the driver's seat.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When an electric motor is arranged below the driver's seat as in the electric work vehicle described in Patent Document 1, noise and vibration generated from the electric motor are transmitted to the driver, deteriorating comfort. An object of the present disclosure is to improve the comfort of the driver in an electric work vehicle.

Means for Solving the Problems

[0005] The electric work vehicle of the present disclosure is a vehicle body, a driver's seat mounted on the vehicle body, traveling wheels arranged on the left and right sides of the driver's seat in a top view and supporting the vehicle body so as to be able to travel, The battery mounted on the vehicle body, The system comprises an electric motor powered by the aforementioned battery, The electric motor is positioned above the wheels. [Effects of the Invention]

[0006] According to this disclosure, driver comfort can be improved in electric work vehicles. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a side view of an electric work vehicle according to the first embodiment. [Figure 2] Figure 2 is a plan view of the rear of the electric work vehicle. [Figure 3] Figure 3 is a rear view (partially a cross-sectional view) of the electric work vehicle. [Figure 4] Figure 4 is a side view (partially a cross-sectional view) of the rear of the electric work vehicle. [Figure 5] Figure 5 is a side view showing an electric motor. [Figure 6] Figure 6 is a block diagram showing an example of the configuration of an electric work vehicle. [Figure 7] Figure 7 is a rear side view (partial cross-sectional view) of the electric work vehicle according to the second embodiment. [Modes for carrying out the invention]

[0008] <Summary of the embodiments of this disclosure> The embodiments of this disclosure are outlined below. (1) The electric work vehicle according to this embodiment is The vehicle body and The driver's seat mounted on the vehicle body, In a top view, the running wheels are positioned to the left and right sides of the driver's seat and support the vehicle body so that it can move, The battery mounted on the vehicle body, The system comprises an electric motor powered by the aforementioned battery, The electric motor is disposed above the traveling wheels.

[0009] According to the above configuration, by disposing the electric motor above the traveling wheels on the left and right sides of the driver's seat, it is possible to suppress the transmission of vibrations and noises from the electric motor to the driver. In the above, "the electric motor is disposed above the traveling wheels" includes not only the case where the entire electric motor is disposed above the traveling wheels but also the case where at least a part thereof is disposed above the traveling wheels.

[0010] (2) The electric working vehicle according to (1) above includes a fender that covers above the traveling wheels. The electric motor is disposed between the traveling wheels and the fender in the vertical direction.

[0011] According to the above configuration, the electric motor can be disposed by effectively using the space between the traveling wheels and the fender in the vertical direction, contributing to the miniaturization of the electric working vehicle. Also, the noise of the electric motor can be blocked by the fender.

[0012] (3) The electric working vehicle according to (1) above further includes a hydraulic pump that is driven by the electric motor and supplies pressure oil to a hydraulic device. The hydraulic pump is disposed above the traveling wheels.

[0013] According to the above configuration, by disposing the hydraulic pump above the traveling wheels on the left and right sides of the driver's seat, it is possible to suppress the transmission of vibrations and noises from the hydraulic pump to the driver. In the above, "the hydraulic pump is disposed above the traveling wheels" includes not only the case where the entire hydraulic pump is disposed above the traveling wheels but also the case where at least a part thereof is disposed above the traveling wheels.

[0014] (4) In the electric working vehicle according to (3) above, the electric motor and the hydraulic pump are arranged side by side in the front-rear direction in a top view.

[0015] This configuration allows the electric motor and hydraulic pump to be compactly arranged in the left-right direction, preventing them from protruding from above the wheels in the left-right direction.

[0016] (5) The electric work vehicle described in (3) or (4) above is equipped with a fender that covers the above of the running wheels, The electric motor and the hydraulic pump are positioned between the running wheel and the fender in the vertical direction.

[0017] This configuration allows for the effective use of the vertical space between the wheels and the fender to accommodate the electric motor and hydraulic pump, contributing to the miniaturization of the electric work vehicle. Furthermore, the fender can block the noise from the electric motor and hydraulic pump.

[0018] (6) The electric work vehicle described in (1) above is further equipped with an inverter for operating the electric motor, The inverter is positioned above the running wheels.

[0019] With this configuration, the inverter can be placed on the left and right sides of the driver's seat and above the driving wheels, allowing the inverter to be placed close to the electric motor, thus simplifying the electrical wiring, such as shortening the electrical wiring between the two. In the above, "the inverter is placed above the driving wheels" does not only mean that the entire inverter is placed above the driving wheels, but also that at least a part of it is placed above the driving wheels.

[0020] (7) In the electric work vehicle described in (6) above, the electric motor and the inverter are arranged side by side in the front-to-back direction when viewed from above.

[0021] This configuration allows the electric motor and inverter to be compactly arranged in the left-right direction, preventing them from protruding from above the wheels in the left-right direction.

[0022] (8) The electric work vehicle described in (6) or (7) above is equipped with a fender that covers the above of the running wheels, The electric motor and the inverter are positioned between the running wheel and the fender in the vertical direction.

[0023] This configuration allows for the effective use of the vertical space between the running wheels and the fender to position the electric motor and inverter, contributing to the miniaturization of the electric work vehicle. Furthermore, the fender can block the noise from the electric motor.

[0024] (9) The electric work vehicle described in (1) above is driven by the electric motor and includes a hydraulic pump that supplies pressurized oil to the hydraulic system, The system further comprises an inverter for operating the aforementioned electric motor, The hydraulic pump and the inverter are positioned above the wheels.

[0025] With this configuration, by positioning the hydraulic pump and inverter on the left and right sides of the driver's seat and above the wheels, vibrations and noise from the hydraulic pump are suppressed from being transmitted to the driver. Furthermore, because the inverter can be placed closer to the electric motor, the electrical wiring can be simplified, such as by shortening the electrical wiring between the two.

[0026] (10) In the electric work vehicle described in (9) above, the electric motor, the hydraulic pump, and the inverter are arranged in a front-to-back direction when viewed from above.

[0027] This configuration allows the electric motor, hydraulic pump, and inverter to be compactly arranged in the left-right direction, preventing them from protruding from above the wheels in the left-right direction.

[0028] (11) The electric work vehicle described in (9) or (10) above is equipped with a fender that covers the above the running wheels, The electric motor, the hydraulic pump, and the inverter are arranged between the running wheel and the fender in the vertical direction.

[0029] This configuration allows for the effective use of the vertical space between the wheels and the fender to accommodate the electric motor, hydraulic pump, and inverter, contributing to the miniaturization of the electric work vehicle. Furthermore, the fender can block the noise from the electric motor and hydraulic pump.

[0030] (12) In the electric work vehicle described in any one of (1) to (11) above, the battery is located in front of the driver's seat.

[0031] This configuration allows for weight balance in the front-to-back direction by distributing the electric motor and battery to the left and right sides of the driver's seat and in front of the driver's seat.

[0032] (13) The electric work vehicle described in any one of (1) to (12) above further comprises a second electric motor that drives the running wheels, The second electric motor is positioned in front of the driver's seat.

[0033] This configuration allows for weight balance in the front-to-back direction by distributing two electric motors to the left and right sides of the driver's seat and in front of the driver's seat.

[0034] (14) The electric work vehicle described in any one of (1) to (13) above further comprises a second battery located below the driver's seat.

[0035] In the electric work vehicle described in Patent Document 1, the electric motor was located below the driver's seat. However, in this disclosure, a second battery is located in the space below the driver's seat instead of the electric motor. Therefore, the space below the driver's seat can be used effectively, and the inconvenience of vibration and noise being transmitted to the driver does not occur.

[0036] <Details of the embodiments of this disclosure> The embodiments of this disclosure will be described in detail below with reference to the drawings. [First Embodiment] [Overall configuration of an electric work vehicle] Figure 1 is a side view of the electric work vehicle according to the first embodiment. Figure 2 is a plan view of the rear side of the electric work vehicle. Figure 3 is a rear view (partial cross-sectional view) of the electric work vehicle. Figure 4 is a side view (partial cross-sectional view) of the rear side of the electric work vehicle. In this specification, the direction in which the electric work vehicle 10 moves forward is defined as front, the direction in which the electric work vehicle 10 moves backward is defined as rear, the left side when the electric work vehicle 10 is facing forward is defined as left, and the right side when the electric work vehicle 10 is facing forward is defined as right.

[0037] As shown in Figure 1, the electric work vehicle 10 in this embodiment is a vehicle used for agricultural work, specifically a tractor. However, the electric work vehicle 10 is not limited to a tractor, and may be a mobile vehicle such as agricultural machinery, construction machinery, or utility vehicle.

[0038] As shown in Figure 1, the electric work vehicle 10 includes a vehicle body 11, a running gear 12, an operating unit 13, and work devices 14 and 15. The vehicle body 11 includes a body frame 21 and a transmission case 22. The body frame 21 is formed to be long in the longitudinal direction so as to extend substantially over the entire longitudinal direction of the vehicle body 11. As shown in Figures 2 to 4, the body frame 21 has a main frame member 21A that extends in the longitudinal direction and a rear frame member 21B located at the rear end of the main frame member 21A.

[0039] As shown in Figures 2 and 3, the main frame member 21A has a pair of left and right plate members formed to be elongated in the front-rear direction. As shown in Figure 3, the rear frame member 21B is composed of plate members formed in a substantially U-shape when viewed from the rear. The mission case 22 is located at the rear of the machine frame 21, particularly between the pair of plate members that make up the main frame member 21A. The rear frame member 21B has a mounting section for attaching the work device 15 (see Figure 1) which is located at the rear of the vehicle body 11.

[0040] The vehicle body 11 includes a bonnet 24 and left and right rear wheel fenders 25. The bonnet 24 covers equipment located at the front of the vehicle frame 21, as shown in Figure 1. This equipment includes, for example, a battery 26, an inverter 27, and an electric motor 28. The rear wheel fenders 25 are mudguards that cover the outer circumference of the left and right rear wheels 12B, mainly above the rear wheels 12B, which will be described later.

[0041] The running gear 12 supports the vehicle body 11 so that it can move. The running gear 12 includes left and right front wheels 12A and left and right rear wheels 12B, which are the running wheels. The front wheels 12A and rear wheels 12B consist of annular tires. The left and right front wheels 12A are mounted on a front axle case supported at the front of the machine frame 21. The left and right rear wheels 12B are mounted on a rear axle case that protrudes from both the left and right sides of the transmission case 22.

[0042] The front wheels 12A and rear wheels 12B are driven by electric motors 28. The front wheels 12A and rear wheels 12B are not limited to tires and may be in other forms such as crawlers. As shown in Figure 2, the rear wheels 12B protrude outward from the rear wheel fenders 25 in the left-right direction when viewed from above. However, the rear wheels 12B may be positioned within a left-right length L3 from the rear wheel fenders 25 when viewed from above.

[0043] As shown in Figures 1 and 2, the driver's unit 13 is located on the vehicle body 11. The driver's unit 13 includes a driver's seat 31, a driver's floor 32, a locomotive frame 33, an instrument panel 34, and control devices 35, etc. The driver's seat 31 is located above the transmission case 22. The driver's seat 31 is the area where the driver sits to operate and run the electric work vehicle 10. The driver's seat 31 is located between the left and right rear wheel fenders 25.

[0044] The driver's floor 32 is located in front of the driver's seat 31 and is situated on the aircraft frame 21. The driver's floor 32 is the area where the driver, seated in the driver's seat 31, rests their feet. The driver's floor 32 is equipped with control pedals (not shown) and the like that can be operated by the driver's feet while seated in the driver's seat 31.

[0045] The lops frame 33 extends upward from the rear end of the aircraft frame 21. The lops frame 33 is formed in a gate shape (downward U-shape) when viewed from the front, and its lower end is connected to the aircraft frame 21. The lops frame 33 is located behind the driver's seat 31 and protects the driver seated in the driver's seat 31. The driver's compartment 13 may have a cabin covering the driver's seat 31, driver's floor 32, etc., instead of the lops frame 33.

[0046] The steering system 35 includes a steering wheel 37 and a power steering system 38. The steering wheel 37 is located in front of the driver's seat 31 and above the driver's floor 32. The steering wheel 37 is annular in shape and rotates around its central axis to control the left-right direction of the front wheels 12A. The steering wheel 37 is connected to the upper end of the power steering system 38. The power steering system 38 in this embodiment is a hydraulic control unit for controlling a hydraulic cylinder 39 for steering that assists the steering force of the front wheels 12A, and switches the flow path of pressurized oil to the hydraulic cylinder 39 by operating the steering wheel 37. The instrument panel 34 is located in front of the steering wheel 37. The instrument panel 34 includes a speedometer, a battery charge meter, and the like.

[0047] Figure 6 is a block diagram showing an example of the configuration of an electric work vehicle. In Figure 6, solid arrows indicate the power supply system, dashed-dotted arrows indicate the power transmission system, and dotted arrows indicate the hydraulic supply system. The electric work vehicle 10 includes a battery 26, inverters 27 and 41, and electric motors 28 and 42. The battery 26 is a rechargeable battery and is configured to be rechargeable by charging equipment such as a charging station. The inverters 27 and 41 convert the DC power discharged from the battery 26 into AC power. The electric motors 28 and 42 are operated by the power supplied from the inverters 27 and 41.

[0048] The electric work vehicle 10 of this embodiment is equipped with two inverters 27, 41 and two electric motors 28, 42. One of the electric motors, 28, is part of the drive system and is powered by electricity supplied from one of the inverters, 27. It transmits power to a continuously variable transmission (CVT) 46 located in the transmission case 22. The CVT 46 is, for example, a hydrostatic transmission (HST). The CVT 46 can shift gears indefinitely in both forward and reverse directions and is operated by a gear shift pedal (not shown) located on the driver's floor 32.

[0049] The output of the continuously variable transmission 46 is transmitted to the rear differential 48 via the auxiliary transmission 47, which rotates the rear wheels 12B. In addition, the output of the continuously variable transmission 46 is transmitted to the front differential 50 via the auxiliary transmission 47 and the front transmission 49, which rotates the front wheels 12A. The power from the electric motor 28, transmitted via the continuously variable transmission 46, is transmitted to the PTO shaft 52 via the PTO transmission 51. The PTO shaft 52 transmits power to working equipment such as tillers and seeders, which are connected to a three-point linkage mechanism located at the rear of the vehicle body 11. Therefore, the electric motor 28 is also an electric motor of the PTO system.

[0050] The other electric motor 42 is an electric motor for the hydraulic work system and is operated by power supplied from the other inverter 41. The electric motor 42 drives the hydraulic pump 43. As shown in Figure 1, these electric motors 42, inverter 41, and hydraulic pump 43 are located above one of the rear wheels 12B (left side) and are covered from above by the rear wheel fender 25.

[0051] The hydraulic pump 43 compresses the hydraulic fluid and supplies it to the hydraulic equipment 14a and 15a via the control valve 44. The electric work vehicle 10 of this embodiment constitutes a so-called tractor loader backhoe (TLB), with a front loader 14 mounted on the front of the vehicle body 11 and a backhoe 15 mounted on the rear of the vehicle body 11. The front loader 14 has a plurality of hydraulic cylinders (hydraulic equipment) 14a for rotating the bucket and swinging the boom. The backhoe 15 has a plurality of hydraulic cylinders (hydraulic equipment) 15a for rotating the bucket and swinging the boom and arm. The hydraulic equipment also includes a lifting device for raising and lowering the three-point linkage mechanism and a hydraulic cylinder 39 for power steering that assists in steering the front wheels 12A.

[0052] As shown in Figures 2 to 4, the electric motor 42, hydraulic pump 43, and inverter 41 are all positioned above one of the left or right rear wheels 12B. In this embodiment, the electric motor 42, hydraulic pump 43, and inverter 41 are positioned above the left rear wheel 12B.

[0053] As shown in Figure 2, the electric motor 42, hydraulic pump 43, and inverter 41 are positioned within a length L1 in the lateral direction of the rear wheel 12B when viewed from above. The electric motor 42 and hydraulic pump 43 are positioned within a length L2 in the longitudinal direction of the rear wheel 12B when viewed from above. In other words, the electric motor 42 and hydraulic pump 43 are positioned in the upper projection area of ​​the rear wheel 12B. The inverter 41 is positioned with its rear end within a length L2 in the longitudinal direction of the rear wheel 12B when viewed from above, and its front end protrudes slightly forward of the rear wheel 12B.

[0054] The electric motor 42, hydraulic pump 43, and inverter 41 are arranged in a front-to-back direction. Specifically, the electric motor 42, hydraulic pump 43, and inverter 41 are arranged in this order from rear to front.

[0055] The electric motor 42 is mounted on a mounting base 54. The mounting base 54 is attached to the rear frame member 21B of the aircraft frame 21. More specifically, the rear frame member 21B has a mounting bracket 55 on its upper part to which the lower end of the lop frame 33 is attached, and the mounting base 54 is fixed to the mounting bracket 55. The upper surface of the mounting base 54 is positioned approximately horizontally. The electric motor 42 is positioned on the mounting base 54 in an approximately horizontal position. The electric motor 42 is positioned slightly behind the axis of the rear wheel 12B. The electric motor 42 is covered from below by the mounting base 54.

[0056] Figure 5 is a side view showing an electric motor. As shown in Figures 3 and 5, the electric motor 42 is equipped with mounting plates 42a that protrude laterally from the front and rear of both the left and right sides. These mounting plates 42a and the mounting base 54 are connected by connectors 57 such as bolts and nuts, with horizontal movement restricted and vertical movement permitted. A cushioning member 56 made of an elastic material such as rubber or synthetic resin is interposed between the mounting plates 42a and the mounting base 54. The cushioning member 56 is compressed when the mounting plates 42a and the electric motor 42 approach each other in the vertical direction. Therefore, the cushioning member 56 can absorb vibrations caused by the movement of the electric work vehicle 10 and suppress their transmission to the electric motor 42.

[0057] As shown in Figures 2 to 4, the hydraulic pump 43 is connected to the front end of the electric motor 42. The hydraulic pump 43 is supported by the electric motor 42. The hydraulic pump 43 is positioned in a nearly horizontal position. The hydraulic pump 43 is located above or in front of the axis of the rear wheel 12B. The rotational power of the electric motor 42 is transmitted to the hydraulic pump 43, which compresses the hydraulic fluid. The hydraulic fluid is contained within the transmission case 22.

[0058] The inverter 41 is mounted on a mounting platform 61 in front of the hydraulic pump 43. The mounting platform 61 is attached to the main frame member 21A of the machine frame 21. Specifically, one end (front end) of the mounting platform 61 is fixed to the left and right outer surfaces of the main frame member 21A, and it extends diagonally upward and rearward. The front end of the mounting platform 61 is located below the operating floor 32.

[0059] The inverter 41 is mounted and fixed on the upper surface of the mounting base 61, which is angled diagonally upward and forward. Therefore, the inverter 41 is positioned in a forward-sloping inclination. The inverter 41 is positioned in front of the axis of the rear wheel 12B. The inverter 41 is positioned above the axis of the rear wheel 12B and is inclined to substantially follow the outer circumferential surface (arc surface) of the rear wheel 12B on the front side. The inverter 41 is covered from the rear wheel 12B side by a mounting base 61 interposed between it and the rear wheel 12B.

[0060] As shown in Figures 1, 3, and 4, the electric motor 42, hydraulic pump 43, and inverter 41 are positioned between the rear wheel 12B and the rear wheel fender 25 in the vertical direction. The electric motor 42, hydraulic pump 43, and inverter 41 are covered from above by the rear wheel fender 25. In a top view, the electric motor 42, hydraulic pump 43, and inverter 41 are positioned within a length L3 in the lateral direction and a length L4 in the longitudinal direction of the rear wheel fender 25. The mounting platforms 54 and 61 are also positioned within a length L3 in the lateral direction and a length L4 in the longitudinal direction of the rear wheel fender 25 in a top view. In other words, the electric motor 42, hydraulic pump 43, inverter 41, and mounting platforms 54 and 61 are positioned in the downward projection area of ​​the rear wheel fender 25.

[0061] As shown in Figures 1 and 4, the electric motor 42, hydraulic pump 43, and inverter 41 are also covered from the front by the rear wheel fender 25. The electric motor 42, hydraulic pump 43, and inverter 41 are positioned within the lateral length of the rear wheel fender 25 in a front view.

[0062] Furthermore, the electric motor 42, hydraulic pump 43, and inverter 41 may have portions that extend beyond the lateral length L3 and longitudinal length L4 of the rear wheel fender 25. The mounting platforms 54 and 61 may also have portions that extend beyond the lateral length L3 and longitudinal length L4 of the rear wheel fender 25.

[0063] As shown in Figure 1, the electric motor 42, hydraulic pump 43, and inverter 41 are covered from the side (left side) by the rear fender 25. More specifically, as shown in Figure 4, the electric motor 42, hydraulic pump 43, and inverter 41 are positioned within the longitudinal length L4 of the rear fender 25 in a side view. Also, the electric motor 42, hydraulic pump 43, and inverter 41 are positioned slightly below the vertical length of the rear fender 25 in a side view. However, the electric motor 42, hydraulic pump 43, and inverter 41 may be positioned entirely within the vertical length of the rear fender 25 in a side view.

[0064] As described above, in the electric work vehicle 10 of this embodiment, the electric motor 42 is positioned on the left and right sides of the driver's seat 31 and above the rear wheels 12B, which are the driving wheels. Therefore, vibrations and noise from the electric motor 42 can be suppressed from being transmitted to the driver sitting in the driver's seat 31. Similarly, the hydraulic pump 43 is also positioned above the rear wheels 12B. Therefore, vibrations and noise from the hydraulic pump 43 can be suppressed from being transmitted to the driver.

[0065] In this embodiment, the electric motor 42, the hydraulic pump 43, and the inverter 41 are arranged side by side in the front-to-back direction. Therefore, these components 42, 43, and 41 can be arranged compactly in the left-to-right direction. In addition, these components 42, 43, and 41 can be positioned above the rear wheel 12B.

[0066] The inverter 41 is positioned above the rear wheel 12B together with the electric motor 42. Therefore, the inverter 41 and the electric motor 42 can be placed close to each other, shortening and simplifying the electrical wiring between them.

[0067] In this embodiment, the electric motor 42, hydraulic pump 43, and inverter 41 are positioned in the vertical space between the rear wheel 12B and the rear wheel fender 25. Therefore, the space formed in the vertical space between the rear wheel 12B and the rear wheel fender 25 can be effectively utilized to position the electric motor 42, hydraulic pump 43, and inverter 41, contributing to the miniaturization of the electric work vehicle 10. In addition, the noise from the electric motor 42 and hydraulic pump 43 can be blocked by the rear wheel fender 25, suppressing the transmission of noise to the driver seated in the driver's seat 31.

[0068] In this embodiment, the electric motor 42 is covered from below by the mounting base 54. Therefore, it is possible to prevent mud splashed up by the rotation of the rear wheel 12B from adhering to the electric motor 42. Similarly, the inverter 41 is covered from the rear wheel 12B side by the mounting base 61. Therefore, it is possible to prevent mud splashed up by the rotation of the rear wheel 12B from adhering to the electric motor 42. Thus, the mounting bases 54 and 61 also function as fenders.

[0069] The electric work vehicle 10 of this embodiment is equipped with two electric motors 28 and 42. One electric motor 28, which controls the travel / PTO system, is positioned in front of the driver's seat 31, while the other electric motor 42, which controls the hydraulic work system, is positioned to the side of the driver's seat 31. By distributing the two electric motors 28 and 42 in the front-rear direction in this way, the weight balance of the electric work vehicle 10 in the front-rear direction can be improved.

[0070] As shown in Figures 2 and 3, a battery 58 is located below the driver's seat 31 and above the transmission case 22. Unlike the battery 26 mounted at the front of the vehicle body 11, which drives the electric motors 28 and 42, this battery 58 is an accessory electric motor that supplies power to lighting, air conditioning equipment, and information equipment.

[0071] Therefore, the electric work vehicle 10 of this embodiment is equipped with two batteries 26 and 58, with one battery 26 positioned in front of the driver's seat 31 and the other battery 58 positioned below the driver's seat 31. By distributing the two batteries 26 and 58 in the front-rear direction in this way, the weight balance of the electric work vehicle 10 in the front-rear direction can be achieved.

[0072] The battery 58 may be located on the left or right side of the driver's seat 31 (for example, on the right side), or it may be located behind the driver's seat 31.

[0073] [Second Embodiment] Figure 7 is a rear side view (partial cross-sectional view) of the electric work vehicle according to the second embodiment. In this embodiment, the electric work vehicle 10 has a rear wheel fender 25 that covers the outer circumference of the rear wheel 12B, which has a space S inside. The electric motor 42, hydraulic pump 43, and inverter 41 are arranged within this space S. Therefore, similar to the first embodiment, the electric motor 42, hydraulic pump 43, and inverter 41 are positioned above the rear wheel 12B. Furthermore, the electric motor 42, hydraulic pump 43, and inverter 41 are arranged in this order from rear to front in the front-to-back direction.

[0074] In this embodiment, the electric motor 42, hydraulic pump 43, and inverter 41 may be supported by the rear wheel fender 12B, or, as in the first embodiment, by a mounting platform attached to the machine frame 21.

[0075] In this embodiment, the rear wheel fender 25 can prevent mud splashed up by the rotation of the rear wheel 12B from adhering to the electric motor 42, hydraulic pump 43, and inverter 41. Other effects are substantially the same as in the first embodiment.

[0076] [Other embodiments] The embodiments disclosed herein are illustrative in all respects and not restrictive. The scope of the present invention is not limited to the embodiments described above, and includes all modifications within the scope equivalent to the configurations described in the claims.

[0077] For example, the front-to-back arrangement of the electric motor 42, hydraulic pump 43, and inverter 41 can be changed as appropriate without being limited to the above embodiment. Also, the electric motor 42, hydraulic pump 43, and inverter 41 do not all need to be arranged in a front-to-back direction; it is sufficient if any two of them are arranged in a front-to-back direction. The hydraulic pump 43 and inverter 41 do not necessarily have to be positioned above the rear wheel 12B or between the rear wheel 12B and the rear wheel fender 25 in the vertical direction. The vehicle body 11 does not necessarily have to be equipped with a rear fender 25. In the above embodiment, the electric motor 42 of the hydraulic work system was positioned above the rear wheel 12B, but the electric motor 28 of the drive system may also be positioned above the rear wheel 12B. [Explanation of Symbols]

[0078] 10: Electric work vehicle 11: Vehicle body 12B: Rear wheels (running wheels) 25: Rear fender 26: Battery 27: Inverter 28: Electric motor 31: Driver's seat 41: Inverter 42: Electric motor 43: Hydraulic pump 58: Battery

Claims

1. The vehicle body and The driver's seat mounted on the vehicle body, In a top view, the running wheels are positioned to the left and right sides of the driver's seat and support the vehicle body so that it can move, The battery mounted on the vehicle body, The system comprises an electric motor powered by the aforementioned battery, An electric work vehicle in which the electric motor is positioned above the wheels.

2. It is equipped with a fender that covers the above the aforementioned running wheel, The electric work vehicle according to claim 1, wherein the electric motor is positioned between the running wheel and the fender in the vertical direction.

3. The system further comprises a hydraulic pump driven by the aforementioned electric motor, which supplies pressurized oil to the hydraulic system, The electric work vehicle according to claim 1, wherein the hydraulic pump is positioned above the travel wheels.

4. The electric work vehicle according to claim 3, wherein the electric motor and the hydraulic pump are arranged side by side in the front-to-back direction when viewed from above.

5. It is equipped with a fender that covers the above the aforementioned running wheel, The electric work vehicle according to claim 3 or 4, wherein the electric motor and the hydraulic pump are arranged between the running wheels and the fender in the vertical direction.

6. The system further includes an inverter for operating the aforementioned electric motor, The electric work vehicle according to claim 1, wherein the inverter is positioned above the running wheels.

7. The electric work vehicle according to claim 6, wherein the electric motor and the inverter are arranged side by side in the front-to-back direction when viewed from above.

8. It is equipped with a fender that covers the above the aforementioned running wheel, The electric work vehicle according to claim 6 or 7, wherein the electric motor and the inverter are arranged between the running wheels and the fender in the vertical direction.

9. A hydraulic pump driven by the aforementioned electric motor supplies pressurized oil to the hydraulic system, The system further comprises an inverter for operating the aforementioned electric motor, The electric work vehicle according to claim 1, wherein the hydraulic pump and the inverter are positioned above the wheels.

10. The electric work vehicle according to claim 9, wherein the electric motor, the hydraulic pump, and the inverter are arranged in a front-to-back direction when viewed from above.

11. It is equipped with a fender that covers the above the aforementioned running wheel, The electric work vehicle according to claim 9 or 10, wherein the electric motor, the hydraulic pump, and the inverter are arranged between the running wheels and the fender in the vertical direction.

12. The electric work vehicle according to any one of claims 1 to 4, 6, 7, 9, and 10, wherein the battery is located in front of the driver's seat.

13. The vehicle further comprises a second electric motor that drives the aforementioned wheels, The electric work vehicle according to any one of claims 1 to 4, 6, 7, 9, and 10, wherein the second electric motor is located in front of the driver's seat.

14. The electric work vehicle according to any one of claims 1 to 4, 6, 7, 9, and 10, further comprising a second battery located below the driver's seat.

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