Work vehicle

Abstract

To provide an electric work vehicle configured so that electrical components can be efficiently arranged to secure a space for a driver sufficiently.SOLUTION: In a work vehicle, in which a pair of left and right front wheels 2 is arranged at a front part of a running vehicle body 1, a pair of left and right rear wheels 3 is arranged at a rear part of the running vehicle body 1 and a work machine 4 is mounted on the running vehicle body 1, a hood part 5 having a predetermined space formed therein is arranged at a front side of the running vehicle body 1, a driving part 6 on which a driver boards and an electric motor 30 for driving the rear wheels 3 are arranged at a rear side of the hood part 5, a battery 50 for storing electric power to be supplied to the electric motor 30 is arranged at the hood part 5, an inverter device 80 for converting DC voltages of the battery 50 into AC voltages is arranged below a driver seat 60, and an enclosure 80A of the inverter device 80 is formed of an upper enclosure 90 and a lower enclosure 91, where a front wall of the upper enclosure 90 is formed to incline downward from a front end part of the upper wall and then extend downward.SELECTED DRAWING: Figure 19

Description

Technical Field

[0001] The present invention relates to a work vehicle that travels in a park or the like and mows turf or the like planted in the park.

Background Art

[0002] Conventionally, a means is known in which a work machine motor for driving a work machine is provided between rear wheels motors for driving the rear wheels of a work vehicle, and a battery for supplying power to these motors is provided in the bonnet portion of the work vehicle. (Patent Document 1)

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the means of Patent Document 1, the arrangement positions of electrical components such as a battery monitoring device for monitoring the charging state of the battery provided in the bonnet portion and an inverter device for increasing or decreasing the output rotation of the motor are complicated. This would result in a compact work vehicle that might compress the space where the driver is located.

[0005] Therefore, An object of the present invention is to provide an electric work vehicle that can efficiently arrange electrical components and secure the driver's space.

Means for Solving the Problems

[0006] The present invention that solves the above problems is as follows.

[0007] That is, the invention according to claim 1 provides a pair of left and right front wheels (2) at the front of a traveling vehicle body (1), a pair of left and right rear wheels (3) at the rear of the traveling vehicle body (1), and a working vehicle in which a working machine (4) is mounted on the traveling vehicle body (1). A bonnet portion (5) having a predetermined space formed on the front side of the traveling vehicle body (1) is provided, and a driver's cab (6) on which an operator rides is provided on the rear side of the bonnet portion (5). An electric motor (30) for driving the rear wheels (3) is provided, and a battery (50) for storing electric power supplied to the electric motor (30) is provided in the bonnet portion (5). Provided in the control unit (6) An inverter device (80) for converting the DC voltage of the battery (50) into an AC voltage is provided below the driver's seat (60). The housing (80A) of the inverter device (80) is formed by an upper housing (90) and a lower housing (91), and the front wall of the upper housing (90) is formed by inclining downward and forward from the front end of the upper wall and then extending downward. A working vehicle characterized by this is provided.

[0008] The invention according to claim 2 is The right part of the upper housing (90) is extended to the right side beyond the right part of the lower housing (91). A working vehicle according to claim 1, characterized by this.

[0009] The invention according to claim 3 is that the working machine (4) is provided between the front wheels (2) and the rear wheels (3) on the lower side of the traveling vehicle body (1), and the lower side of the right part of the upper housing (90) is the lower housing ( 91 ) A working vehicle according to claim 2, characterized in that a biasing means (47) for pulling up the working machine (4) provided on the right part of the working machine (4) is provided in a space formed on the right side of the working machine (4).

[0010] The invention according to claim 4 is that the electric motor (30) is provided on the rear lower side of the driver's seat (60) of the driver's cab (6), and an opening (90A) for inserting a harness connecting the inverter device (80) and the electric motor (30) is provided in the rear wall of the upper housing ( 90 ) A working vehicle according to any one of claims 1 to 3, characterized in that it is formed.

Advantages of the Invention

[0011] According to the present invention, electrical components can be efficiently arranged to secure the driver's space.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Figure 24

Figure 25

Embodiments for Carrying Out the Invention

[0013] As shown in FIG. 1, a work vehicle such as a riding lawn mower includes a traveling vehicle body 1, a pair of left and right front wheels 2 provided at the front of the traveling vehicle body 1, a pair of left and right rear wheels 3 provided at the rear of the traveling vehicle body 1, and a working machine 4 for mowing grass and the like is provided between the front wheels 2 and the rear wheels 3 on the lower side of the traveling vehicle body 1. Further, a bonnet portion 5 is provided at the front upper side of the traveling vehicle body 1, a control unit 6 on which an operator boards is provided at the rear side of the bonnet portion 5, a safety frame (ROPS) 8 for protecting the operator is provided at the rear side of the control unit 6, and a grass collecting container 7 for storing grass and the like cut by the working machine 4 is provided at the lower part of the safety frame 8.

[0014] As shown in FIGS. 2 and 3, a battery 50 for storing electric power supplied to an electric motor 30 or the like for driving the rear wheels 3 is provided in the bonnet portion 5, and the battery 50 is covered with a bonnet cover 51. The bonnet cover 51 is supported by a support shaft (not shown) extending in the left-right direction provided at the front of the traveling vehicle body 1. Thereby, the space formed in the bonnet portion 5 can be effectively utilized, and the difference in the weight balance in the front-rear direction of the work vehicle can be suppressed.

[0015] Electrical components 61 are provided below the driver's seat 60 of the control unit 6. Thereby, the space formed below the driver's seat 60 can be effectively utilized.

[0016] The safety frame 8 includes a left support portion 8L extending in the vertical direction, a right support portion 8R extending in the vertical direction, and an inverted U-shaped connection that connects the upper portions of the left support portion 8L and the right support portion 8R. Part 8 It is formed from A.

[0017] As shown in FIGS. 4 to 7, below the electrical component 61, there is provided an electric motor such as a synchronous motor or an induction motor that is operated by a three-phase AC voltage waveform for driving the rear wheel 3. Machine 3 0 is provided. The output shaft 30A formed to extend in the left-right direction is connected to the upper portion of a gear box 31 that decelerates the output rotation transmitted from the output shaft 30A to increase the output torque or reverse the rotation direction. Note that the electric motor 30 is provided at a position offset to the left of the center in the left-right direction.

[0018] The output rotation increased or decreased in speed by the gear box 31 is transmitted to a drive shaft 33 extending in the left-right direction via a differential gear 32 provided at the lower portion of the gear box 31 and formed by a differential gear or the like. The output rotation transmitted to the drive shaft 33 is transmitted to the rear wheels 3 supported at both ends of the drive shaft 33.

[0019] Below the electric motor 30, there is provided an electric motor such as a synchronous motor or an induction motor that is operated by a three-phase AC voltage waveform for driving the working machine 4. Machine 4 0 is provided. The output shaft 40A formed to extend in the front-rear direction is connected to the rear portion of a universal joint 41 provided to extend in the front-rear direction. Further, the output shaft 40A is provided above the drive shaft 33 and orthogonal to the drive shaft 33. Thereby, the space formed below the electric motor 30 can be effectively utilized. Also, the transmission path between the electric motor 40 and the working machine 4 can be shortened, so that the output rotation of the electric motor 40 can be efficiently transmitted to the working machine 4. Note that the electric motor 40 is provided at a position offset to the left of the center in the left-right direction.

[0020] The front part of the universal joint 41 is connected to a gear box 42 that decelerates the output rotation transmitted from the universal joint 41 and increases the output torque. The output rotation transmitted to the gear box 42 is transmitted to a left cutting blade (not shown) provided in the left discharge passage 45L of the working machine 4 via an output shaft formed to extend in the vertical direction of the gear box 42.

[0021] A connecting member 43 extending in the left - right direction is connected to the left part of the gear box 42, and the right part of the connecting member 43 is connected to a gear box 44. The output rotation transmitted to the gear box 44 is transmitted to a right cutting blade (not shown) provided in the right discharge passage 45R of the working machine 4 via an output shaft formed to extend in the vertical direction of the gear box 44. The rotational speeds of the output rotations of the output shafts of the gear box 42 and the gear box 44 are the same, and the rotation directions are opposite. That is, in a plan view, the output shaft of the gear box 42 rotates clockwise, and the output shaft of the gear box 44 rotates counterclockwise.

[0022] The discharge ports of the left discharge passage 45L and the right discharge passage 45R are connected to the inlet of a chute 46 that conveys the mown grass, etc. to the grass collecting container 7. The discharge port of the chute 46 is connected to the inlet of the grass collecting container 7.

[0023] In a plan view, the front part of the chute 46 is provided on the right side of the universal joint 41, the rear part of the chute 46 is provided on the right side of the gear box 31, and in a rear view, the chute 46 and the grass collecting container 7 are provided between the gear box 31 and the right rear wheel 3. Thereby, a large chute 46 can be provided in the space formed on the right side of the universal joint 41 and the gear box 31, and the grass, etc. mown by the working machine 4 can be efficiently conveyed to the grass collecting container 7.

[0024] In a side view, the upper wall of the chute 46 is formed with a rear - rising slope, and the rear part of the chute 46 is provided to extend downward below the electrical components 61. Thereby, the rear part of the chute 46 can be enlarged to prevent clogging of the grass, etc. inside the chute 46.

[0025] As shown in FIGS. 8 and 9, the traveling vehicle body 1 is formed by a traveling vehicle body main body 10 that supports front wheels 2 and rear wheels 3, and a steering post 11 that supports a steering shaft 63.

[0026] In the traveling vehicle body main body 10, a left front-rear frame 10L and a right front-rear frame 10R extending in the front-rear direction are formed. At the lower part of the steering post 11, a left connecting portion 11L and a right connecting portion 11R extending forward are formed.

[0027] The left connecting portion 11L is fixed to the left front-rear frame 10L by fastening means such as bolts, and the right connecting portion 11R is fixed to the right front-rear frame 10R by fastening means such as bolts to be integrated and form the traveling vehicle body 1.

[0028] A left support member 12L is provided at the front portion of the left front-rear frame 10L, and the connecting portion of the left support member 12L is formed to have an upward slope to the left. Also, a right support member 12R is provided at the front portion of the right front-rear frame 10R, and the connecting portion of the right support member 12R is formed to have an upward slope to the right. Note that the left support member 12L and the right support member 12R are formed of channel steel materials.

[0029] A left support member 13L is provided at the front portion of the left connecting portion 11L, and the connecting portion of the left support member 13L is formed to have an upward slope to the left. Also, a right support member 13R is provided at the front portion of the right connecting portion 11R, and the connecting portion of the right support member 12R is formed to have an upward slope to the right. Note that the left support member 13L and the right support member 13R are formed of channel steel materials.

[0030] At the lower part of the steering post 11, a protruding portion 14 protruding forward is formed at a predetermined interval in the left-right direction, and a buffer member 15 formed of a rubber member or the like is provided at the tip of the protruding portion 14.

[0031] A left upper and lower frame 20L extending upward is provided at the rear of the left front and rear frame 10L, and a right upper and lower frame 20R extending upward is provided at the rear of the right front and rear frame 10R. The upper parts of the left upper and lower frame 20L and the right upper and lower frame 20R are connected to a left and right frame 21 extending in the left and right direction.

[0032] A left connecting portion 22L to which the lower part of the left support column portion 8L of the safety frame 8 is connected is provided at the left part of the left and right frame 21, and a right connecting portion 22R to which the lower part of the right support column portion 8R of the safety frame 8 is connected is provided at the right part of the left and right frame 21.

[0033] As shown in FIG. 10, the lower part of the battery 50 provided in the bonnet portion 5 is fitted inside the inner peripheral portion of the battery bracket 52. The battery 50 is formed by connecting a plurality of high energy density lithium ion batteries in series and in parallel. Thereby, the space formed in the bonnet portion 5 can be utilized. Further, since the lithium ion battery has a high energy density, the work vehicle can travel a long distance by one full charge.

[0034] As shown in FIG. 11, the battery bracket 52 is formed by a left front and rear frame 52L and a right front and rear frame 52R extending in the front and rear direction, a front left and right frame 52A connecting the front parts of the left front and rear frame 52L and the right front and rear frame 52R, and a rear left and right frame 52B connecting the rear parts of the left front and rear frame 52L and the right front and rear frame 52R. The left front and rear frame 52L and the right front and rear frame 52R are formed of angle steel materials, and the front left and right frame 52A and the rear left and right frame 52B are formed of channel steel materials.

[0035] The connecting portion of the left front and rear frame 52L is formed with an upward left inclination, and the connecting portion of the right front and rear frame 52R is formed with an upward left inclination. In a rear view, the upward left inclinations of the connecting portion of the left support member 13L, the connecting portion of the left support member 12L, and the connecting portion of the left front and rear frame 52L are formed at the same inclination angle, and the upward right inclinations of the connecting portion of the right support member 12R, the connecting portion of the right support member 12R, and the connecting portion of the right front and rear frame 52R are formed at the same inclination angle.

[0036] On the lower surface of the connecting portion of the left front and rear frame 52L, round left vibration damping members 53L are provided at predetermined intervals in the front-rear direction. On the lower surface of the connecting portion of the right front and rear frame 52R, round right vibration damping members 53R are provided at predetermined intervals in the front-rear direction.

[0037] The left front and rear frame 52L is connected to the left support member 12L of the left front and rear frame 10L and the left support member 13L of the left connecting portion 11L via the left vibration damping member 53L. The right front and rear frame 52R is connected to the right support member 12R of the right front and rear frame 10R and the right support member 13R of the right connecting portion 11R via the right vibration damping member 53R. Thereby, it is possible to suppress the vibration of the traveling vehicle body main body 10 generated during the traveling of the work vehicle from being transmitted to the battery 50, and prevent damage to the battery 50 and the like.

[0038] As shown in FIG. 12, the connecting portion of the left front and rear frame 52L is provided orthogonally to a left virtual line 55L connecting the center of the left vibration damping member 53L and the center of the left front wheel 2L on the left side. Further, the connecting portion of the right front and rear frame 52R is provided orthogonally to a right virtual line 55R connecting the center of the right vibration damping member 53R and the center of the right front wheel 2R on the right side. Thereby, it is possible to suppress large vibrations caused by the unevenness of the traveling surface via the front wheels 2 and the rear wheels 3, and prevent damage to the battery 50 and the like. Note that reference numeral 57 indicates a front wheel support frame that supports the left and right front wheels 2, and reference numeral 56 indicates a connecting portion between the front wheel support frame and the traveling vehicle body main body 10, and indicates a swing axis of the front wheel support frame.

[0039] Also, the tip of the buffer member 15 of the steering post 11 is pressed against the rear surface of the rear left and right frame 52B of the battery bracket 52. Thereby, it is possible to suppress the backward movement of the battery 50 when the work vehicle starts, and prevent damage to the battery 50 and the like.

[0040] As shown in FIGS. 13 and 14, a protective frame 58 extending along the outer peripheral portion of the battery 50 is provided at the middle portion in the front-rear direction of the battery 50. Thereby, it is possible to suppress the battery 50 from being damaged when the work vehicle overturns.

[0041] The protective frame 58 includes a left support portion 58L extending upward from the left front-rear frame 10L, a right support portion 58R extending upward from the right front-rear frame 10R, and an inverted U-shaped connection connecting the upper portions of the left support portion 58L and the right support portion 58R Part 5 formed from 8A.

[0042] In a side view, a virtual line 59 connecting the base of the connecting portion 58A of the protective frame 58 and the top of the connecting portion 8A of the safety frame 8 is formed to be located above the steering wheel 62. Thereby, a large protective space is formed below the virtual line 59, and it is possible to suppress the operator from colliding with external tree branches or the like during the travel of the work vehicle, thereby improving work safety.

[0043] As shown in FIGS. 2 and 3, a steering wheel 62 is provided on the front side of the driver's seat 60 of the control unit 6, and the steering wheel 62 is supported on the upper portion of a steering shaft 63 extending in the vertical direction.

[0044] A cleaner lever 65 for operating the conveyance of the mowed grass remaining inside the shooter 4 to the rear grass collection container 7 or the like is provided on the left fender 64L on the left side of the driver's seat 60, and an operation lever 66 for operating the lift layer of the work machine 4 is provided on the fender 64R on the right side of the driver's seat 60. Further, a brake pedal 68 is provided at the left front portion of the floor 67 on which the operator places his / her feet during operation, and a forward accelerator pedal 70 and a reverse accelerator pedal 71 are provided side by side at the right front portion.

[0045] As shown in FIGS. 15 to 17, the electrical components 61 provided in the space formed between the shooter 46 of the work machine 4 and the driver's seat 60 include an inverter device 80 that converts the DC voltage supplied from the battery 50 into an AC voltage to generate a three-phase AC voltage waveform for operating the motor 30 etc., a battery monitoring device 81 that monitors the temperature, charge state, voltage protection, and short-circuit state of each cell of the battery 50, an auxiliary battery 82 such as a lead-acid battery that stores electricity for supplying a battery to a meter panel (not shown) that displays the traveling speed etc. provided on the front side of the driver's seat 60, and a converter device 83 that changes the DC voltage supplied from the battery 50 to a DC voltage for supplying to sensors that detect the operation positions of the cleaner lever 65 etc.

[0046] The inverter device 80 is composed of an inverter device 84 that operates the motor 30 and an inverter device 85 that operates the motor 40. Further, when the regenerative brake is activated, that is, when the forward accelerator pedal 75 or the reverse accelerator pedal 76 is released and the output shaft 30A rotates due to the inertial force of the traveling vehicle body 1 and the motor 30 operates as a generator, the inverter device 80 also has a function as a charging device that charges the battery 50 with the power supplied from the motor 30.

[0047] In plan view, the inverter device 80 is provided at the front part below the driver's seat 60, and the battery monitoring device 81 is provided at the rear side of the inverter device 80. Further, the auxiliary battery 82 is provided on the left side of the inverter device 80, and the converter device 83 is provided on the rear side of the auxiliary battery 82 and on the left side of the battery monitoring device 81. Thereby, the space formed below the driver's seat 60 can be effectively utilized. Also, by providing the heavy battery monitoring device 81 at the rear side, the difference in weight applied to the front and rear parts of the traveling vehicle body main body 10 can be suppressed, and the traveling stability performance can be improved.

[0048] As shown in FIGS. 18 and 19, the housing 80A of the inverter device 80 is formed by a box-shaped upper housing 90 with an open lower part and a box-shaped lower housing 91. The front and rear walls of the upper housing 90 are fixed to the front and rear walls of the lower housing 91 with fastening members such as bolts to be integrated. In the upper housing 90, an inverter device 84 and an inverter device 85 are provided. In the lower housing 91, a junction for connecting a harness, a charging relay, etc. are provided.

[0049] In the left-right direction, the left walls of the upper housing 90 and the lower housing 91 are formed at the same position, and the right wall of the upper housing 90 extends to the right side beyond the right wall of the lower housing 91. Thereby, a space is formed below the right part of the upper housing 90 and to the right of the right part of the lower housing 91. As shown in FIG. 20, biasing means 47 such as a spring for pulling up the working machine 4 provided on the right part of the working machine 4 can be provided.

[0050] An opening 90A is formed at the upper right part of the rear wall of the upper housing 90 for inserting a harness connecting the inverter device 84 and the motor 30 and a harness connecting the inverter device 85 and the motor 40. Also, an opening 91A is formed at the lower left part of the rear wall of the lower housing 91 for inserting a harness connecting the battery monitoring device 81 and the charging relay, etc.

[0051] As shown in FIG. 21, the front wall of the upper housing 90 is formed to extend downward after inclining forward and downward from the front end of the upper wall. Thereby, it is possible to prevent the legs of the operator sitting on the operator's seat 60 from contacting the front wall of the upper housing 90.

[0052] The lower wall of the lower housing 91 is formed to be inclined upward and backward in parallel with the upper wall of the shooter 46 of the working machine 4 after extending rearward from the lower end of the front wall. Thereby, as shown in FIG. 22, it is possible to prevent the portion of the harness 89 connecting the battery 50 and the battery monitoring device 81 facing the lower rear part of the lower housing 91 from being excessively bent and prevent breakage of the harness 89, etc.

[0053] At the corner of the lower wall of the lower housing 91, a round grommet Truck 8 6 is provided. Further, the lower housing 91 is connected to support members 16A extending in the front-rear direction provided on both sides of left and right frames 16 extending in the left-right direction provided at the rear part of the traveling vehicle body main body 10 via grommets 86. Thereby, it is possible to suppress the vibration of the traveling vehicle body main body 10 generated during the traveling of the work vehicle from being transmitted to the inverter device 84 or the like, and prevent damage to the inverter device 84 or the like. Further, as shown in FIG. 22, a predetermined space is formed between the lower wall of the lower housing 91 and the upper wall of the shooter 46 of the work implement 4, and the harness 89 connecting the battery 50 and the battery monitoring device 81 can be easily routed using this space.

[0054] As shown in FIG. 23, a pair of front and rear right grommets Truck 8 6R provided at the right part of the lower wall of the lower housing 91 is provided behind a pair of front and rear left grommets Truck 8 6L provided at the left part of the lower wall of the lower housing 91. Thereby, it is possible to prevent the fixing pin 88 that extends downward of the support member 16A through the right grommet 86R from contacting the upper wall of the shooter 46 of the work implement 4.

[0055] The fixing pin 88 inserted through the front left grommet 86L is formed thinner than the fixing pin 88 inserted through the rear left grommet 86L, and the fixing pin 88 inserted through the rear right grommet 86R is formed thinner than the fixing pin 88 inserted through the front left grommet 86L. Thereby, the lower housing 91 can be easily attached to the pair of left and right support members 16A via the fixing pins 88.

[0056] As shown in FIG. 24, round grommets 87 are provided on the lower wall of the housing 81A of the battery monitoring device 81 at a predetermined interval in the front-rear direction and the left-right direction. Further, the housing 81A is connected to a support frame 18 that is connected to left and right frames 17 provided on the rear side of the left and right frames 16 via the grommets 87. Thereby, it is possible to suppress the vibration of the traveling vehicle body main body 10 generated during the traveling of the work vehicle from being transmitted to the battery monitoring device 81 and prevent damage to the battery monitoring device 81. Further, wires and the like connecting the battery monitoring device 81 and the battery 50 can be inserted into the hollow portion formed in the grommet 87, and the routing of the wires and the like can be easily performed.

[0057] As shown in FIG. 25, the base of the forward accelerator pedal 70 is rotatably supported by a support shaft extending in the left-right direction provided at the rear of a support member 72 standing upright at the right front portion of the floor 67, and the base of the reverse accelerator pedal 71 is rotatably supported by a support shaft extending in the left-right direction provided at the middle portion in the front-rear direction of the support member 72. Further, the rotation angle of the forward accelerator pedal 70 corresponding to the depression amount of the forward accelerator pedal 70 and the rotation angle of the reverse accelerator pedal 71 corresponding to the depression amount of the reverse accelerator pedal 71 are measured by an angle sensor 73 such as a potentiometer provided at the front portion of the support member 72.

[0058] The rotation angle measured by the angle sensor 73 is transmitted to the inverter device 80. Thereby, in the inverter device 80, the frequency and amplitude of the three-phase AC voltage waveform are increased or decreased according to the transmitted rotation angle, and the output rotation of the output shaft 30A of the electric motor 30 can be increased or decreased.

Explanation of Reference Numerals

[0059] 1 Traveling vehicle body 2 Front wheel 3 Rear wheel 4 Working machine 5 Bonnet part 6 Control part 8 Safety frame 8A Connecting part (first connecting part) 16 Left and right frames 16A support member 30 Electric motor (first electric motor) 40 Electric motor (second electric motor) 46 Shooter 50 Battery 58 Protection frame 58A Connecting part (second connecting part) 59 Virtual line 60 Cockpit 62 Steering wheel 80 Inverter device 80A Housing 81 Battery monitoring device 86 Grommet (vibration-proof member) 86L Left grommet (left vibration-proof member) 86R Right grommet (right vibration-proof member) 90 Upper housing 91 Lower housing

Claims

1. In a work vehicle provided with a pair of left and right front wheels (2) at the front of a traveling body (1), a pair of left and right rear wheels (3) at the rear of the traveling body (1), and a working machine (4) mounted on the traveling body (1), a bonnet portion (5) having a predetermined space formed on the front side of the traveling body (1) is provided, and a cab portion (6) for a driver to board is provided on the rear side of the bonnet portion (5), an electric motor (30) for driving the rear wheels (3) is provided, a battery (50) for storing electric power supplied to the electric motor (30) is provided in the bonnet portion (5), an inverter device (80) for converting the DC voltage of the battery (50) into an AC voltage is provided below the driver's seat (60) provided in the cab portion (6), A work vehicle, characterized in that a housing (80A) of the inverter device (80) is formed by an upper housing (90) and a lower housing (91), and a front wall of the upper housing (90) is formed to extend downward after inclining forward and downward from the front end portion of the upper wall.

2. The work vehicle according to claim 1, characterized in that a right portion of the upper housing (90) extends to the right side beyond a right portion of the lower housing (91).

3. The working machine (4) is provided between the front wheels (2) and the rear wheels (3) on the lower side of the traveling body (1), The work vehicle according to claim 2, characterized in that a biasing means (47) for pulling up the working machine (4) provided on the right portion of the working machine (4) is provided in a space formed below the right portion of the upper housing (90) and on the right side of the lower housing (91).

4. The electric motor (30) is provided at the rear side below the driver's seat (60) of the cab portion (6), The work vehicle according to any one of claims 1 to 3, characterized in that an opening (90A) for inserting a harness connecting the inverter device (80) and the electric motor (30) is formed in a rear wall of the upper housing (90).

Images