Work vehicle

Abstract

To provide a work vehicle high in energy efficiency and excellent in steering performance by suppressing variations in the position of the gravity center in a right-left direction.SOLUTION: Provided is a work vehicle in which: a first electric motor (30) for driving a work device (4) and a motor chamber (8) for storing a second electric motor (40) for driving front wheels (2) are provided on a rear lower side of a steering part (5); a grass collecting container (7) for storing reaped turf grass is provided on an upper side of the motor chamber (8); a longitudinal direction of the first electric motor (30) is provided along a front-back direction on the left side of the center in a right-left direction of a machine body frame (1) in a plane view; and a longitudinal direction of the second electric motor (40) is provided along a front-back direction on the right side of the center of a right-left direction of the machine body frame (1).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a work vehicle for cutting lawn grass. [Background technology]

[0002] Conventionally, there is known a work vehicle in which a working device for cutting grass is disposed in front of a control section, an engine for driving the front wheels and the working device is disposed below and behind the control section, and a grass collection container for storing cut grass is disposed above the engine (Patent Document 1).

[0003] There is also known a work vehicle in which a grass-cutting implement is disposed between the front and rear wheels, a battery is disposed in the bonnet in front of the steering unit, an electric motor that drives the rear wheels and an electric motor that drives the implement are disposed below and behind the steering unit, and a grass collection container that stores cut grass is provided to the right of these motors (Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2022-176759 A [Patent Document 2] JP 2023-27497 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the solution of Patent Document 1 has a problem in that the energy efficiency is low because the transmission device that transmits the output rotation of the engine to the rear wheels and the working device has a complex configuration and a large number of parts.

[0006] Furthermore, with the solution described in Patent Document 2, the position of the center of gravity in the left-right direction varies depending on the amount of grass stored in the grass collection container, which can cause the operator to feel uncomfortable when steering. There is also the problem that the battery and motor are positioned far apart in the fore-aft direction, making it difficult to arrange them.

[0007] SUMMARY OF THE PRESENT EMBODIMENTS The present invention provides a work vehicle that is highly energy efficient and has good maneuverability by suppressing fluctuations in the center of gravity position in the lateral direction. [Means for solving the problem]

[0008] The present invention which has solved the above problems is as follows. That is, the invention described in claim 1 is a work vehicle having a pair of left and right front wheels (2) and rear wheels (3) on the lower side of a machine frame (1), a working device (4) for cutting grass on the front side of the machine frame (1), and a control unit (5) on which an operator rides on the upper side of the machine frame (1), This work vehicle is characterized in that an electric motor room (8) housing a first electric motor (30) that drives the work device (4) and a second electric motor (40) that drives the front wheels (2) is provided below and behind the control section (5), a grass collection container (7) for collecting cut grass is provided above the electric motor room (8), and in plan view, the first electric motor (30) is arranged to the left of the left-right center of the body frame (1) so that its longitudinal direction runs along the front-to-rear direction, and the second electric motor (40) is arranged to the right of the left-to-right center of the body frame (1) so that its longitudinal direction runs along the front-to-rear direction.

[0009] A second aspect of the present invention is the work vehicle according to the first aspect, wherein the vertical center of the first electric motor (30) and the vertical center of the second electric motor (40) are located at the same position in rear view.

[0010] The invention recited in claim 3 is the work vehicle recited in claim 1 or 2, wherein the first electric motor (30) is a larger electric motor than the second electric motor (40).

[0011] The invention described in claim 4 is the work vehicle described in claim 1 or 2, in which a first output shaft (31A) of a first reduction gear (31) attached to the first electric motor (30) and a second output shaft (41A) of a second reduction gear (41) attached to the second electric motor (40) extend in the fore-and-aft direction.

[0012] The invention recited in claim 5 is the work vehicle recited in claim 4, wherein a rotating shaft of a work PTO that transmits the output rotation of the first output shaft (31A) to the work implement (4) extends in the front-rear direction.

[0013] The invention according to claim 6 is the work vehicle according to claim 1 or 2, further comprising a fan (61) provided on a left wall of the motor chamber (8) for blowing outside air into the motor chamber (8).

[0014] The invention recited in claim 7 is the work vehicle recited in claim 6, further comprising a radiator (60) for cooling water circulating through the first electric motor (30) and the second electric motor (40), provided on the left side of the fan (61).

[0015] The invention of claim 8 is the work vehicle of claim 1 or 2, further comprising: a battery (50) for storing electric power to be supplied to the first electric motor (30) and the second electric motor (40) provided at the rear of the electric motor compartment (8); a first inverter device (35) for driving the first electric motor (30) provided between the first electric motor (30) and the battery (50); and a second inverter device (45) for driving the second electric motor (40) provided between the second electric motor (40) and the battery (50).

[0016] The invention recited in claim 9 is the work vehicle recited in claim 8, wherein a rear portion of the battery (50) is provided above and overlaps with a drive shaft (46) extending in the left-right direction of the rear wheels (3) in a plan view. Effect of the Invention

[0017] According to the invention described in claim 1, the motor room (8) housing the first electric motor (30) for driving the working device (4) and the second electric motor (40) for driving the front wheels (2) is provided below and behind the steering section (5), the grass collection container (7) for collecting cut grass is provided above the motor room (8), and the first electric motor (30) is provided on the left side of the center in the left-right direction of the machine frame (1) so that the longitudinal direction of the first electric motor (30) is aligned along the front-rear direction, and the second electric motor (40) is provided on the right side of the center in the left-right direction of the machine frame (1) so that the energy loss in the transmission path between the first electric motor (30) and the working device (4) and the transmission path between the second electric motor (40) and the front wheels (2) can be suppressed to improve energy efficiency. Also, the weight difference between the weights applied to the left and right sides of the center in the left-right direction of the machine frame (1) can be suppressed to improve maneuverability.

[0018] According to the invention recited in claim 2, in addition to the effect of the invention recited in claim 1, the vertical center of the first electric motor (30) and the vertical center of the second electric motor (40) are located at the same position in rear view, so that the difference in the vertical center of gravity can be suppressed, thereby further improving steering performance.

[0019] According to the invention recited in claim 3, in addition to the effects of the invention recited in claim 1 or 2, the first electric motor (30) is a larger electric motor than the second electric motor (40), so that the working device (4), which is constantly driven and to which a large load is applied, can be smoothly driven.

[0020] According to the invention recited in claim 4, in addition to the effects of the invention recited in claim 1 or 2, the first output shaft (31A) of the first reduction gear (31) attached to the first electric motor (30) and the second output shaft (41A) of the second reduction gear (41) attached to the second electric motor (40) extend in the front-to-rear direction. This makes it possible to reduce the number of transmission parts, such as bevel gears, between the first electric motor (30) and the working device (4) and between the second electric motor (40) and the front wheels (2).

[0021] According to the invention recited in claim 5, in addition to the effect of the invention recited in claim 4, the rotating shaft of the work PTO, which transmits the output rotation of the first output shaft (31A) to the working device (4), extends in the front-rear direction, so that the number of transmission parts of the first electric motor (30) and the working device (4) can be further reduced.

[0022] According to the invention recited in claim 6, in addition to the effects of the invention recited in claim 1 or 2, a fan (61) for blowing outside air into the motor chamber (8) is provided on the left wall of the motor chamber (8). This makes it possible to cool the first electric motor (30) and the second electric motor (40) and to prevent malfunctions in the bearings, etc., of the first electric motor (30) and the second electric motor (40).

[0023] According to the seventh aspect of the invention, in addition to the effect of the sixth aspect, the radiator (60) for cooling the water circulating through the first electric motor (30) and the second electric motor (40) is provided to the left of the fan (61), so that the first electric motor (30) and the second electric motor (40) can be further cooled.

[0024] According to the invention of claim 8, in addition to the effects of the invention of claim 1 or 2, a battery (50) for storing electric power to be supplied to the first electric motor (30) and the second electric motor (40) is provided at the rear of the motor chamber (8), a first inverter device (35) for driving the first electric motor (30) is provided between the first electric motor (30) and the battery (50), and a second inverter device (45) for driving the second electric motor (40) is provided between the second electric motor (40) and the battery (50). This makes it easy to arrange cables connecting the first electric motor (30) and the first inverter device (35), etc. Also, the space formed between the first electric motor (30), etc., and the battery (50) can be effectively utilized.

[0025] According to the invention recited in claim 9, in addition to the effects of the invention recited in claim 8, the rear portion of the battery (50) is arranged to overlap the upper side of the drive shaft (46) extending in the left-right direction of the rear wheel (3) in a plan view, thereby making it possible to suppress deformation of the vehicle frame (1). [Brief description of the drawings]

[0026] [Figure 1] FIG. 2 is a perspective view of the work vehicle as viewed from the front left side. [Diagram 2] FIG. 2 is a perspective view of the front part of the motor compartment as viewed from the rear left side. [Diagram 3] FIG. 4 is a perspective view of the rear part of the motor compartment as viewed from the rear left side. [Figure 4] FIG. [Diagram 5] FIG. 2 is a perspective view of the electric motor as viewed from the rear left side. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 2 is a perspective view of the battery as viewed from the rear left side. [Figure 9] FIG. 4 is a plan view of the motor compartment with the battery mounted therein. [Figure 10] FIG. 2 is a plan view of the electric motor and the inverter device. [Figure 11] FIG. 2 is a left side view of the electric motor and the inverter device. [Figure 12] 3 is a transmission diagram of the output rotation of the electric motor. [Figure 13] FIG. [Figure 14] FIG. 2 is a perspective view of the motor chamber as viewed from the rear right side. [Figure 15] FIG. 4 is an explanatory diagram of a flow path for water circulating through an electrical unit, etc. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] As shown in FIG. 1, the work vehicle is provided with a pair of left and right front wheels 2 at the front portion below the machine frame 1, and a pair of left and right rear wheels 3 at the rear portion below the machine frame 1.

[0028] A working device 4 for cutting grass growing in the field is provided at the front of the body frame 1, and a control unit 5 on which the operator sits is provided at the rear of the working device 4, and a safety frame (ROPS) 6 for protecting the operator is provided at the rear of the control unit 5. A grass collection container 7 for storing the cut grass is provided at the rear of the safety frame 6, and an electric motor room 8 is provided below the grass collection container 7 in which the electric motor 40 for driving the rear wheels 3, a battery 50, etc. are arranged.

[0029] A steering column 10 that supports a steering wheel is provided in front of the cockpit of the control section 5. A monitor that displays the output speed of the electric motor 40 and the like is provided on the upper part of the steering column 10, and the lower part is fixed to the front part of the floor.

[0030] A brake pedal 11 for reducing the rotation speed of the front wheels 2 is provided on the left side of a steering column 10 on the floor, and a speed change pedal 12 for increasing or decreasing the output rotation speed of the electric motor 40 is provided on the right side.

[0031] The upper part of the front wheel 2 is covered with a fender 13, and the fender 13 located to the right of the cockpit is provided with a gear shift lever 14 for operating an inverter device 45 that increases or decreases the speed of the output rotation of the electric motor 40.

[0032] The rear of the working device 4 and the front of the grass collection container 7 are connected by a chute 16 extending in the front-to-rear direction, and a blower 17 for exhausting air into the chute 16 is provided in the middle of the chute 16 in the front-to-rear direction.

[0033] A pair of left and right link arms 18 are provided at the front parts of the left and right walls of the grass collection container 7. The front parts of the link arms 18 are fixed to the left and right parts of the safety frame 6 so as to be able to swing freely, the safety frame 6 and the link arms 18 are connected by lifting parts 19 such as hydraulic cylinders, and the rear part of the bottom wall of the grass collection container 7 is placed on a horizontal frame 21A of a support frame 21, which will be described later. This allows the grass collection container 7 to be raised and lowered by driving the lifting parts 19.

[0034] As shown in Figures 2 and 3, a work motor (the "first electric motor" in the claims) 30 that drives the working device 4 and a driving motor (the "second electric motor" in the claims) 40 that drives the front wheels 2 are provided in the front electric motor chamber 8A of the electric motor chamber 8, and a battery 50 that stores electricity to be supplied to the electric motor 30 etc. is provided in the rear electric motor chamber 8B.

[0035] In a plan view, the electric motor 30 is provided on the left side of the center line of the vehicle frame 1 in the left-right direction, and the electric motor 40 is provided on the right side of the center line of the vehicle frame 1 in the left-right direction. By suppressing the weight difference between the weight applied to the left side of the center line in the left-right direction of the body frame 1 and the weight applied to the right side of the center line in the left-right direction of the body frame 1, maneuverability can be improved.

[0036] When viewed from the side, a support frame 20 extending upward from the body frame 1 is provided in the partition between the front electric chamber 8A and the rear electric chamber 8B, and a support frame 21 extending upward from the body frame 1 is provided at the rear end of the rear electric chamber 8B.

[0037] The support frame 20 is formed of a left vertical frame 20L extending upward from the middle of the left side of the body frame 1, a right vertical frame 20R extending upward from the middle of the right side of the body frame 1, and a horizontal frame 20A extending in the left-right direction connecting the upper parts of the left vertical frame 20L and the right vertical frame 20R.

[0038] The support frame 21 is formed of a left vertical frame 21L extending upward from the rear end of the left side of the body frame 1, a right vertical frame 21R extending upward from the rear end of the right side of the body frame 1, a horizontal frame 21A extending in the left-right direction connecting the upper parts of the left vertical frame 21L and the right vertical frame 21R, and a horizontal frame 21B extending in the left-right direction connecting the middle parts of the left vertical frame 21L and the right vertical frame 21R. The left part of the horizontal frame 21B extends leftward beyond the left vertical frame 21L, and the right part extends rightward beyond the right vertical frame 21R.

[0039] The middle part of the left vertical frame 20L and the left end part of the horizontal frame 21B are connected by the left front-rear frame 22L extending in the front-rear direction, and the middle part of the right vertical frame 20R and the right end part of the horizontal frame 21B are connected by the right front-rear frame 22R extending in the front-rear direction. This allows the rear part of the battery 50 to be located above the drive shaft 46 of the rear wheel 3, preventing the vehicle frame 1 from being significantly deformed.

[0040] The upper part of the left vertical frame 20L and the middle part of the left vertical frame 23L provided at the rear of the steering unit 5 are connected by a left front-rear frame 24L extending in the fore-and-aft direction, and the upper part of the right vertical frame 20R of the support frame 20 and the middle part of the right vertical frame 23R provided at the rear of the steering unit 5 are connected by a right front-rear frame 24R extending in the fore-and-aft direction.

[0041] 4, the longitudinal direction of electric motor 30 is aligned along the front-rear direction. Electric motor 40 is aligned adjacent to the left side of electric motor 30, and the longitudinal direction of electric motor 40 is aligned along the front-rear direction.

[0042] A radiator 60 for cooling water for cooling the electric motor 30 and the like is provided on the outside of the left wall of the electric motor chamber 8, and a fan 61 for blowing outside air toward the electric motor chamber 8 is provided between the radiator 60 and the electric motor 30. A circular opening (not shown) is formed in a portion of the left wall of the electric motor chamber 8 facing the fan 61. This makes it possible to suppress a rise in temperature of the electric motor 30 and the like, and to prevent the electric motor 30 and the like from malfunctioning. The fan 61 can also be provided on the left side of the radiator 60.

[0043] An auxiliary battery 65 that stores power to be supplied to the monitor of the control unit 5 is provided on the outside of the portion of the right wall of the motor compartment 8 facing the radiator 60. This makes it possible to reduce the weight difference between the left and right parts of the work vehicle.

[0044] 5 to 7, an output shaft 30A of the electric motor 30 is connected to a reducer (a "first reducer" in the claims) 31 provided below the electric motor 30. An output shaft (a "first output shaft" in the claims) 31A of the reducer 31 extends forward and is connected to a work clutch 32 provided between the reducer 31 and the transmission path of the working device 4.

[0045] An output shaft 40A of the electric motor 40 is connected to a reducer (a "second reducer" in the claims) 41 provided in front of the electric motor 40. An output shaft (a "second output shaft" in the claims) 41A of the reducer 41 extends forward, and an output shaft 41B extends rearward and is connected to a 4WD clutch 43 provided between the transmission path of the reducer 41 and the rear wheels 3 for switching between front-wheel drive and four-wheel drive.

[0046] In rear view, the electric motors 30 and 40 are disposed at the same height in the vertical direction. This makes it possible to provide the electric motors 30 and 40 in the lower part of the front motor chamber 8A and to ensure a space for providing a monitoring unit 72 for monitoring the state of the battery 50 above the electric motors 30 and 40.

[0047] 5 to 7 and the like show the electric motors 30 and 40 of the same size, the electric motor 30 can be changed to an electric motor larger than the electric motor 40. This makes it possible to smoothly drive the working device 4 which is constantly driven and subjected to a large load.

[0048] 8, the battery 50 is formed of four battery modules 50A. The upper parts of the four battery modules 50A are connected by a pair of left and right angle-shaped mounting frames 51 that are spaced a predetermined distance apart in the left and right direction and extend in the front-rear direction, and the lower parts are connected by a pair of left and right square pipe-shaped mounting frames 52 that are spaced a predetermined distance apart in the left and right direction and extend in the front-rear direction.

[0049] The front part of the mounting frame 51 extends forward beyond the battery 50, and the rear part extends rearward beyond the battery 50. The mounting frame 52 is formed to extend from the front end to the rear end of the battery 50.

[0050] As shown in Figures 3 and 9, the front part of the mounting frame 51 is removably fixed to the horizontal frame 20A of the support frame 20 by fastening members such as bolts, and the rear part is removably fixed to the horizontal frame 21A of the support frame 21 by fastening members such as bolts.

[0051] The left mounting frame 52 is placed on the left front-rear frame 22L, and the right mounting frame 52 is placed on the right front-rear frame 22R.

[0052] Openings 51A are formed at the front and rear of the mounting frame 51, through which hanging hooks can be inserted when replacing the battery 50. This allows the battery 50 to be easily attached to and detached from the support frames 20 and 21, and the battery 50 can be easily replaced.

[0053] As shown in Figs. 10 and 11, an inverter device (a "first inverter device" in the claims) 35 for driving the electric motor 30 is provided at a predetermined interval in the front-rear direction behind the electric motor 30, and an inverter device 45 for driving the electric motor 40 is provided at a predetermined interval in the front-rear direction behind the electric motor 40. The inverter devices 35, 45 are provided at a predetermined interval in the front-rear direction in front of the battery 50. This allows the electric motors 30, 40 and the inverter devices 35, 45 to be easily arranged. In addition, air blown from a fan 61 passes through the gap between the electric motors 30, 40 and the inverter devices 35, 45, allowing the electric motors 30, 40 and the inverter devices 35, 45 to be efficiently cooled.

[0054] As shown in FIG. 12, the output rotation of an output shaft 30A of an electric motor 30 is reduced in speed reducer 31 and then output from output shafts 31A and 31B of the speed reducer 31.

[0055] The output rotation of the output shaft 31A is transmitted to a work PTO 33 via a work clutch 32 to drive the work device 4. In addition, the output rotation of the output shaft 31B is transmitted to a hydraulic pump 34 that pumps oil to be supplied to the lifting component 19 and the like.

[0056] The output rotation of the output shaft 30A of the electric motor 30 is transmitted to a blower PTO 37 via a blower clutch 36 to drive the blower 17.

[0057] The output rotation of the output shaft 40A of the electric motor 40 is reduced in speed by the reducer 41 and then output from the output shaft 41A of the reducer 31.

[0058] The output rotation of the output shaft 41A is transmitted to a front wheel differential gear 42 to drive the front wheels 2, and is also transmitted to a rear wheel differential gear 44 via a 4WD clutch 43, and the output rotation of the differential gear 44 is transmitted to a drive shaft 46 to drive the rear wheels 3.

[0059] As shown in FIGS. 13 and 14, a power receiving port 70 for receiving power from a household power source is provided on the upper rear side of the radiator 60.

[0060] Provided below the battery 50 is an electrical equipment unit 71 that includes a charger 71A that converts the power supplied to the power receiving port 70 from AC to DC and supplies the power to the battery 50, and a converter 71B that steps down the DC voltage supplied via a power distribution unit 73 or the like to the rated voltage of the auxiliary battery 65. The electrical equipment unit 71 is detachably fixed to the lower sides of the left front-rear frame 22L and the right front-rear frame 22R.

[0061] A monitoring unit 72 incorporating a monitoring device for monitoring the temperature and voltage of the battery 50 is provided in front of the battery 50. The monitoring unit 72 is detachably fixed to the upper sides of the left front-rear frame 24L and the right front-rear frame 24R.

[0062] In a side view, it is preferable that the upper wall of the monitoring unit 72 is positioned lower than the mounting frame 51. This prevents the monitoring unit 72 from protruding above the mounting frame 51 and allows the motor chamber 8 to be formed low in the vertical direction, so that the center of gravity of the grass collection container 7 arranged above the motor chamber 8 can be set at a low position, allowing the work vehicle to travel stably.

[0063] A power distribution unit 73 having a built-in terminal block for distributing the power supplied from the monitoring unit 72 to the inverter devices 35, 45 and the converter 71B of the electrical equipment unit 71 is provided below the monitoring unit 72. The power distribution unit 73 is detachably fixed to the lower sides of the left front-rear frame 24L and the right front-rear frame 24R.

[0064] A pressure valve 60A is provided at the top of the radiator 60, a cooling pump 63 that pressurizes the water cooled by the radiator 60 is provided at the lower rear of the radiator 60, and a reserve tank 64 that stores reserve water circulating through the radiator 60 is provided at the rear of the radiator 60.

[0065] 15, water pumped from cooling pump 63 flows into flow path 66A, which circulates through the cooling member attached to motor 30 and the cooling member attached to inverter device 35, and returns to radiator 60, and flow path 66B, which circulates through the cooling member attached to electrical unit 71, the cooling member attached to motor 40, and the cooling member attached to inverter device ("second inverter device" in claims) 45, and returns to radiator 60. This makes it possible to efficiently cool electric motor 30, which generates more heat by rotating at a higher torque to drive working device 4 than electric motor 40.

[0066] The cooling member attached to the electrical unit 71 is provided above the cooling pump 63. In a side view, the liquid level of the cooling member attached to the electrical unit 71, the liquid level of the cooling member attached to the inverter devices 35 and 45, and the liquid level of the cooling member attached to the electric motors 30 and 40 are provided in this order from the bottom, and the liquid level of the cooling member attached to the electric motors 30 and 40 is provided at the highest position. In addition, in a side view, the pressure valve 60A of the radiator 60 is provided at a position higher than the liquid level of the cooling member attached to the electric motors 30 and 40. As a result, the air in the cooling pump 63 is exhausted to the outside from the pressure valve 60A of the radiator 60 via the cooling member attached to the electrical unit 71 together with the water, so that the air entrapment in the cooling pump 63 can be suppressed and the breakdown of the cooling pump 63 can be prevented. Note that the liquid level in this specification refers to the upper surface of the water that flows into the cooling member attached to the electrical unit 71 when the work vehicle is stopped in a horizontal position in a side view. [Explanation of symbols]

[0067] 1 Aircraft frame 2 Front wheels 3 Rear wheel 4 Work equipment 5. Control Unit 7 Grass collection container 8 Electric room 30 Electric motor (1st electric motor) 31 Reducer (1st reducer) 31A Output shaft (first output shaft) 35 Inverter device (first inverter device) 40 Electric motor (second electric motor) 41 Reducer (2nd reducer) 41A Output shaft (2nd output shaft) 45 Inverter device (second inverter device) 46 Drive shaft 50 Battery 60 Radiator 61 Fans

Claims

1. A work vehicle having a pair of left and right front wheels (2) and rear wheels (3) provided below a body frame (1), a working device (4) for cutting grass provided in front of the body frame (1), and a control section (5) for an operator to ride on provided above the body frame (1), a motor room (8) for accommodating a first motor (30) for driving the working device (4) and a second motor (40) for driving the front wheel (2) is provided below and behind the steering section (5); A grass collection container (7) for collecting cut grass is provided above the motor chamber (8), A work vehicle characterized in that, in a plan view, a first electric motor (30) is provided to the left of the left-right center of the body frame (1) with its longitudinal direction aligned along the fore-and-aft direction, and a second electric motor (40) is provided to the right of the left-right center of the body frame (1) with its longitudinal direction aligned along the fore-and-aft direction.

2. 2. The work vehicle according to claim 1, wherein a vertical center of the first electric motor (30) and a vertical center of the second electric motor (40) are located at the same position in rear view.

3. 3. A work vehicle according to claim 1, wherein the first electric motor (30) is larger than the second electric motor (40).

4. 3. The work vehicle according to claim 1 or 2, wherein a first output shaft (31A) of a first reduction gear (31) attached to the first electric motor (30) and a second output shaft (41A) of a second reduction gear (41) attached to the second electric motor (40) extend in a front-rear direction.

5. 5. The work vehicle according to claim 4, wherein a rotary shaft of a work PTO for transmitting the output rotation of the first output shaft (31A) to a work device (4) extends in the front-rear direction.

6. 3. The work vehicle according to claim 1, further comprising a fan (61) provided on a left wall of the motor compartment (8) for blowing outside air into the motor compartment (8).

7. 7. The work vehicle according to claim 6, further comprising a radiator (60) for cooling water circulating through the first electric motor (30) and the second electric motor (40) provided on the left side of the fan (61).

8. a battery (50) for storing electric power to be supplied to the first electric motor (30) and the second electric motor (40) is provided at the rear of the electric motor chamber (8); a first inverter device (35) for driving the first electric motor (30) is provided between the first electric motor (30) and a battery (50); 3. The work vehicle according to claim 1, further comprising a second inverter device (45) for driving the second electric motor (40) provided between the second electric motor (40) and a battery (50).

9. 9. A work vehicle according to claim 8, wherein a rear portion of a battery (50) is provided above and overlaps a drive shaft (46) extending in the left-right direction of the rear wheels (3) in a plan view.

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