Work vehicles

Abstract

To provide a work vehicle which enables easy arrangement of a harness.SOLUTION: A hood part 5 formed with a predetermined space is provided at a front side on an upper surface of a travelling vehicle body 1, and a driving part 6 on which an operator gets is provided rearward of the hood part 5. An electric motor 30 for driving the rear wheels 3 is provided, and a battery 50 for storing electric power to be supplied to the electric motor 30 is provided at the hood part 5. A shooter 46 for transporting grass mown by a work machine 4 to a grass collection container 7 is provided. An inverter device 80 which converts a direct current voltage of the battery 50 into an alternating current voltage and a battery monitoring device 81 which monitors a charging state etc. of the battery 50 are provided between the shooter 46 and a driving seat 60. The battery monitoring device 81 is provided at an upper side of an area behind the inverter device 80. A lower wall of a first housing 80A of the inverter device 80 is provided spaced apart from an upper wall of the shooter 46 in an upward direction by a predetermined distance.SELECTED DRAWING: Figure 17

Description

[Technical field]

[0001] The present invention relates to a work vehicle that travels through a park or the like to cut grass or the like planted therein. [Background technology]

[0002] Conventionally, there has been known a means for providing a work machine electric motor for driving a work machine between rear wheel electric motors for driving the rear wheels of a work vehicle, and providing a battery in the bonnet section of the work vehicle for supplying power to these electric motors (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-218951 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the solution described in Patent Document 1, the arrangement of electrical components such as a battery monitoring device mounted in the bonnet that monitors the charging state of the battery and an inverter device that increases or decreases the output rotation of the electric motor becomes complicated, and there is a risk that it may not be easy to route the harness connecting the battery and battery monitoring device and the harness connecting the inverter device and the electric motor.

[0005] Therefore, the present invention provides a work vehicle in which electrical components such as a battery monitoring device and an inverter device are provided between the driver's seat in the control section and the chute of the work machine, making it easy to arrange the harnesses connecting the battery and battery monitoring device and the harnesses connecting the inverter device and the electric motor. [Means for solving the problem]

[0006] The present invention which has solved the above problems is as follows.

[0007] That is, the invention described in claim 1 is a work vehicle having 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 work machine (4) for cutting weeds such as grass on the underside of the traveling body (1), in which a bonnet section (5) having a predetermined space formed on the front side of the upper surface of the traveling body (1), a control section (6) on which a driver sits is provided behind the bonnet section (5), and a work machine (4) for driving the rear wheels (3) is provided. Install the motor (30) hair, The electric motor (30) a battery (50) for storing the power to be supplied is provided in the bonnet portion (5); A chute (46) is provided for transporting the grass cut by the working machine (4) to a grass collection container (7), and the chute (46) and Between the cockpit (60), an inverter device (80) for converting the DC voltage of the battery (50) into AC voltage and a battery monitoring device (81) for monitoring the charging state of the battery (50) are provided. The battery monitoring device (81) is provided on the rear upper side of the inverter device (80). No. 1 The work vehicle is characterized in that the lower wall of the housing (80A) is provided at a predetermined distance above the upper wall of the chute (46).

[0008] The invention described in claim 2 is No. 1 The housing (80A) is made of an elastic material. No. 1 A vibration-isolating member (86) is disposed above the chute (46) of the traveling vehicle body (1) and extends in the left-right direction. No. 1 The work vehicle according to claim 1, wherein the left and right frames (16) are connected to support members (16A) extending in the front-rear direction and provided on both sides of the frames (16).

[0009] The invention described in claim 3 is No. 1 The vibration isolating member (86) No. 1 A pair of left vibration isolating members (86L) are provided on the left side of the housing (80A), No. 1 The work vehicle according to claim 2, further comprising a pair of right vibration isolating members (86R) provided on the right side of the housing (80A), the right vibration isolating member (86R) being provided forward of the left vibration isolating member (86L).

[0010] The invention described in claim 4 is 4. The battery monitoring device according to claim 2 or 3, wherein a second housing (81A) of the battery monitoring device (81) is connected to a support frame (18) connected to a second left / right frame (17) provided on the rear side of the first left / right frame (16) via a second vibration isolating member (87) made of an elastic material. It is a work vehicle. Effect of the Invention

[0011] According to the invention described in claim 1, the inverter device (80) and the battery monitoring device (81) can be provided in the space formed under the cockpit (60), No. 1 A harness and an inverter device (80) for connecting the battery (50) and the battery monitoring device (81) in the space formed between the bottom wall of the housing (80A) and the top wall of the chute (46) and an electric motor (30) By inserting the harnesses to be connected, the wiring work of these harnesses can be easily performed.

[0012] According to the invention of claim 2, in addition to the effect of the invention of claim 1, , run This can prevent the inverter device (80) from malfunctioning due to vibrations generated in the traveling vehicle body (1) during traveling.

[0013] According to the invention of claim 3, in addition to the effect of the invention of claim 2, ,stomach This can prevent the inverter device (80) from being attached upside down.

[0014] According to the invention described in claim 4, In addition to the effects of the invention as recited in claim 2 or 3, it is possible to prevent the battery monitoring device (81) from malfunctioning due to vibrations generated in the traveling vehicle body (1) during traveling. [Brief description of the drawings]

[0015] [Figure 1] FIG. [Diagram 2] FIG. 2 is a left side view of the work vehicle with the bonnet cover in an open position. [Diagram 3] 1 is a perspective view of a main portion of a work vehicle with a part cut away. [Figure 4] FIG. [Diagram 5] FIG. 2 is a plan view of the rear wheels and essential parts of the working machine. [Figure 6] FIG. 4 is a left side view of the rear wheel and essential parts of the work machine. [Figure 7] FIG. 2 is a left side view of the electric motor for the rear wheels and the electric motor for the work machine. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 2 is a perspective view of a battery and a battery bracket. [Figure 11] FIG. [Figure 12] FIG. 2 is a front view of the front wheel, the battery, and the battery bracket. [Figure 13] FIG. 2 is a perspective view of a protective frame of the battery. [Figure 14] FIG. 2 is an explanatory diagram of a protective space formed by a protective frame and a safety frame. [Figure 15] FIG. 2 is a plan view of a main portion of the work vehicle with a part cut away. [Figure 16] FIG. [Figure 17] FIG. 2 is a perspective view of electrical components provided below the cockpit. [Figure 18] FIG. 2 is a front perspective view of a housing of the inverter device. [Figure 19] FIG. 2 is a rear perspective view of a housing of the inverter device. [Figure 20] 13 is an explanatory diagram showing a biasing means for raising and lowering a work machine provided below an upper housing of the inverter device housing. FIG. [Figure 21] FIG. 2 is a left side view of the housing of the inverter device. [Figure 22] FIG. 11 is an explanatory diagram showing a harness routed between a chute of a work machine and a housing of an inverter device. [Figure 23] FIG. 2 is a bottom view of the housing of the inverter device. [Figure 24] FIG. 2 is a perspective view of a housing of the battery monitoring device. [Diagram 25] FIG. 2 is a perspective view of a forward accelerator pedal and a reverse accelerator pedal of the steering section. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] As shown in Fig. 1, a work vehicle such as a riding lawnmower has a traveling body 1, a pair of left and right front wheels 2 provided at the front of the traveling body 1, a pair of left and right rear wheels 3 provided at the rear of the traveling body 1, and a working machine 4 for cutting grass or the like provided between the front wheels 2 and the rear wheels 3 on the underside of the traveling body 1. In addition, a bonnet section 5 is provided at the front of the upper side of the traveling body 1, a control section 6 on which a driver sits is provided behind the bonnet section 5, a safety frame (ROPS) 8 for protecting the driver is provided behind the control section 6, and a grass collection container 7 for storing grass cut by the work machine 4 is provided below the safety frame 8.

[0017] 2 and 3, a battery 50 that stores electricity to be supplied to the electric motor 30 that drives the rear wheels 3 and the like are provided in the bonnet section 5, and the battery 50 is covered by a bonnet cover 51. The bonnet cover 51 is supported by a support shaft (not shown) that is provided at the front of the traveling body 1 and extends in the left-right direction. This makes it possible to effectively utilize the space formed in the bonnet section 5, and also makes it possible to suppress differences in the weight balance in the front-rear direction of the work vehicle.

[0018] Electrical components 61 are provided below the pilot's seat 60 of the control section 6. This allows the space formed below the pilot's seat 60 to be utilized effectively.

[0019] 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 connecting portion that connects the upper portions of the left support portion 8L and the right support portion 8R. Part 8 It is formed from A.

[0020] As shown in FIGS. 4 to 7, below the electrical components 61, there is provided an electric motor such as a synchronous motor or an induction motor operated by a three-phase AC voltage waveform for driving the rear wheels 3. machine 3 An output shaft 30A extending in the left-right direction of the electric motor 30 is connected to an upper portion of a gear box 31 that reduces the speed of the output rotation transmitted from the output shaft 30A to increase the output torque or reverse the direction of rotation. The electric motor 30 is disposed at a position offset to the left of the center in the left-right direction.

[0021] The output rotation accelerated or decelerated by the gear box 31 is transmitted to a drive shaft 33 extending in the left-right direction via a differential gear 32 formed by a differential gear or the like, which is provided at the bottom of the gear box 31. 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.

[0022] Below the motor 30, a motor such as a synchronous motor or an induction motor operated with a three-phase AC voltage waveform for driving the work machine 4 is provided. machine 4 0 is provided. An output shaft 40A extending in the front-rear direction of the electric motor 40 is connected to the rear of a universal joint 41 extending in the front-rear direction. The output shaft 40A is provided above the drive shaft 33 and perpendicular to the drive shaft 33. This allows the space formed below the electric motor 30 to 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. The electric motor 40 is provided at a position offset to the left of the center in the left-right direction.

[0023] A front portion of the universal joint 41 is connected to a gear box 42 which reduces the speed of the output rotation transmitted from the universal joint 41 to increase 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 work machine 4 via an output shaft formed to extend in the vertical direction of the gear box 42.

[0024] A connecting member 43 extending in the left-right direction is connected to the left part of the gearbox 42, and a right part of the connecting member 43 is connected to the gearbox 44. The output rotation transmitted to the gearbox 44 is transmitted to a right cutting blade (not shown) provided in a right discharge passage 45R of the work machine 4 via an output shaft formed to extend in the up-down direction of the gearbox 44. The output rotation speeds of the output shafts of the gearbox 42 and gearbox 44 are the same but the rotation directions are opposite; that is, in a plan view, the output shaft of the gearbox 42 rotates clockwise and the output shaft of the gearbox 44 rotates counterclockwise.

[0025] The discharge outlets of the left discharge passage 45L and the right discharge passage 45R are connected to the inlet of a chute 46 that transports cut grass, etc. to the grass collection container 7. The discharge outlet of the chute 46 is connected to the inlet of the grass collection container 7.

[0026] In a plan view, the front part of the chute 46 is provided to the right of the universal joint 41, and the rear part of the chute 46 is provided to the right of the gear box 31, and in a rear view, the chute 46 and the grass collection container 7 are provided between the gear box 31 and the right rear wheel 3. This makes it possible to provide a large chute 46 in the space formed to the right of the universal joint 41 and the gear box 31, and allows grass and the like cut by the work machine 4 to be efficiently transported to the grass collection container 7.

[0027] In a side view, the upper wall of the chute 46 is formed with a rearward upward inclination, and the rear portion of the chute 46 is provided extending downward below the electrical components 61. This makes it possible to enlarge the rear portion of the chute 46 and prevent the inside of the chute 46 from becoming clogged with grass or the like.

[0028] As shown in FIGS. 8 and 9, the vehicle body 1 is formed of a vehicle body main body 10 that supports the front wheels 2 and the rear wheels 3, and a steering post 11 that supports the steering shaft 63.

[0029] The vehicle body 10 is formed with a left front-rear frame 10L and a right front-rear frame 10R extending in the front-rear direction, and the lower part of the steering post 11 is formed with a left connecting portion 11L and a right connecting portion 11R extending forward.

[0030] The left connecting portion 11L is fixed to the left front and rear frame 10L by fastening means such as bolts, and the right connecting portion 11R is fixed to the right front and rear frame 10R by fastening means such as bolts, thereby forming the traveling body 1 as one body.

[0031] A left support member 12L is provided at the front of the left front-rear frame 10L, and the connecting portion of the left support member 12L is formed with an upward incline to the left. A right support member 12R is provided at the front of the right front-rear frame 10R, and the connecting portion of the right support member 12R is formed with an upward incline to the right. The left support member 12L and the right support member 12R are made of channel steel.

[0032] A left support member 13L is provided in front of the left connecting portion 11L, and the connecting portion of the left support member 13L is formed with an upward incline to the left. A right support member 13R is provided in front of the right connecting portion 11R, and the connecting portion of the right support member 12R is formed with an upward incline to the right. The left support member 13L and the right support member 13R are made of channel steel.

[0033] A protrusion 14 is formed at the bottom of the steering post 11 so as to protrude forward at a predetermined interval in the left-right direction, and a buffer member 15 made of a rubber material or the like is provided at the tip of the protrusion 14.

[0034] 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, and 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.

[0035] A left connecting portion 22L is provided on the left part of the left-right frame 21, to which the lower part of the left support portion 8L of the safety frame 8 is connected, and a right connecting portion 22R is provided on the right part of the left-right frame 21, to which the lower part of the right support portion 8R of the safety frame 8 is connected.

[0036] As shown in Fig. 10, the lower part of the battery 50 provided inside the bonnet section 5 is fitted inside the inner periphery of the battery bracket 52. The battery 50 is formed by connecting multiple lithium ion batteries with high energy density in series and in parallel. This makes it possible to effectively utilize the space formed in the bonnet section 5. In addition, because the lithium ion battery has a high energy density, the work vehicle can travel long distances on a single full charge.

[0037] 11, the battery bracket 52 is formed of a left front-rear frame 52L and a right front-rear frame 52R extending in the front-rear direction, a front left-right frame 52A connecting the front portions of the left front-rear frame 52L and the right front-rear frame 52R, and a rear left-right frame 52B connecting the rear portions of the left front-rear frame 52L and the right front-rear frame 52R. The left front-rear frame 52L and the right front-rear frame 52R are formed of angle steel, and the front left-right frame 52A and the rear left-right frame 52B are formed of channel steel.

[0038] The connecting portion of the left front and rear frame 52L is inclined upward to the left, and the connecting portion of the right front and rear frame 52R is inclined upward to the left. In rear view, 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 inclined upward to the left at the same inclination angle, and 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 inclined upward to the right at the same inclination angle.

[0039] A circular left vibration-isolating member 53L is provided on the underside of the connecting portion of the left front-rear frame 52L at a predetermined interval in the front-rear direction, and a circular right vibration-isolating member 53R is provided on the underside of the connecting portion of the right front-rear frame 52R at a predetermined interval in the front-rear direction.

[0040] 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 isolating member 53L, and 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 isolating member 53R. This makes it possible to suppress the vibration of the traveling vehicle body 10 that occurs when the work vehicle is traveling from being transmitted to the battery 50, thereby preventing damage to the battery 50, etc.

[0041] As shown in FIG. 12, the connecting portion of the left front and rear frame 52L is provided perpendicular to a left imaginary line 55L connecting the center of the left vibration isolator 53L and the center of the left front wheel 2L on the left side. Also, the connecting portion of the right front and rear frame 52R is provided perpendicular to a right imaginary line 55R connecting the center of the right vibration isolator 53R and the center of the right front wheel 2R on the right side. This makes it possible to suppress large vibrations caused by unevenness of the running surface via the front wheels 2 and the rear wheels 3, and to prevent damage to the battery 50. Reference numeral 57 denotes a front wheel support frame that supports the left and right front wheels 2, and reference numeral 56 denotes a connecting portion between the front wheel support frame and the running vehicle body 10, and denotes a swing axis of the front wheel support frame.

[0042] Additionally, the tip of the buffer member 15 of the steering post 11 is pressed against the rear surfaces of the left and right rear frames 52B of the battery bracket 52. This makes it possible to restrict rearward movement of the battery 50 when the work vehicle starts moving, thereby preventing damage to the battery 50, etc.

[0043] 13 and 14, a protective frame 58 is provided at the middle of the battery 50 in the front-rear direction, extending along the outer periphery of the battery 50. This makes it possible to prevent the battery 50 from being damaged when the work vehicle rolls over.

[0044] 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 connecting member that connects the upper portions of the left support portion 58L and the right support portion 58R. Part 5 It is made up of 8A.

[0045] In a side view, an imaginary 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. This forms a large protective space below the imaginary line 59, preventing the operator from colliding with external tree branches, etc. while the work vehicle is traveling, thereby improving work safety.

[0046] As shown in FIGS. 2 and 3, a steering wheel 62 is provided in front of a pilot's seat 60 of the pilot's section 6, and the steering wheel 62 is supported on an upper portion of a steering shaft 63 that extends in the vertical direction.

[0047] A cleaner lever 65 for controlling the transport of grass clippings remaining inside the chute 46 to the grass collection container 7 at the rear is provided on the left fender 64L on the left side of the operator's seat 60, and an operation lever 66 for controlling the raising and lowering of the work implement 4 is provided on the right fender 64R of the operator's seat 60. A brake pedal 68 is provided on the left front part of a floor 67 on which the operator places his / her feet when operating the vehicle, and a forward accelerator pedal 70 and a reverse accelerator pedal 71 are provided side by side on the right front part.

[0048] As shown in Figures 15 to 17, the electrical components 61 provided in the space formed between the chute 46 of the work machine 4 and the cockpit 60 are composed of an inverter device 80 that converts the DC voltage supplied from the battery 50 into AC voltage and generates a three-phase AC voltage waveform for operating the electric motor 30, etc., a battery monitoring device 81 that monitors the temperature, charging 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 to be supplied to a meter panel (not shown) that displays the driving speed, etc., provided in front of the cockpit 60, and a converter device 83 that converts the DC voltage supplied from the battery 50 into a DC voltage to be supplied to a sensor that detects the operating position of the cleaner lever 65, etc.

[0049] The inverter device 80 is formed of an inverter device 84 that operates the electric motor 30 and an inverter device 85 that operates the electric motor 40. The inverter device 84 also functions as a charging device that charges the battery 50 with the power supplied from the electric motor 30 to the inverter device 80 when regenerative braking 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, causing the electric motor 30 to operate as a generator.

[0050] In a plan view, an inverter device 80 is provided in the front below the driver's seat 60, and a battery monitoring device 81 is provided behind the inverter device 80. An auxiliary battery 82 is provided to the left of the inverter device 80, and a converter device 83 is provided to the left of the battery monitoring device 81 and behind the auxiliary battery 82. This makes it possible to effectively utilize the space formed below the driver's seat 60. Also, by providing the heavy battery monitoring device 81 at the rear, the difference in weight applied to the front and rear of the traveling vehicle body 10 can be suppressed, thereby improving traveling stability.

[0051] As shown in FIGS. 18 and 19, the housing of the inverter device 80 ("First housing" in the claims) 80A is formed from a box-shaped upper housing 90 with an opening at the bottom, and a box-shaped lower housing 91, and the front and rear walls of upper housing 90 are fixed to the front and rear walls of lower housing 91 with fastening members such as bolts to form an integrated unit. Inverter device 84 and inverter device 85 are provided in upper housing 90, and a junction for connecting a harness, a charging relay, and the like are provided in lower housing 91.

[0052] 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 is formed extending further to the right than the right wall of the lower housing 91. As a result, 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, and as shown in Fig. 20, a biasing means 47 such as a spring that lifts up the working machine 4 provided on the right part of the working machine 4 can be provided.

[0053] An opening 90A is formed in the upper right portion of the rear wall of the upper housing 90, through which a harness connecting the inverter device 84 and the electric motor 30 and a harness connecting the inverter device 85 and the electric motor 40 can be inserted. In addition, an opening 91A is formed in the lower left portion of the rear wall of the lower housing 91, through which a harness connecting the battery monitoring device 81 and a charging relay, etc. can be inserted.

[0054] 21, the front wall of the upper housing 90 is formed so as to incline downward from the front end of the upper wall and then extend downward. This makes it possible to prevent the legs of a pilot seated in the pilot's seat 60 from coming into contact with the front wall of the upper housing 90.

[0055] The lower wall of the lower housing 91 extends rearward from the lower end of the front wall, and then is formed with an upward rearward inclination in parallel with the upper wall of the chute 46 of the work machine 4. This prevents the portion of the harness 89 connecting the battery 50 and the battery monitoring device 81, which faces the lower rear part of the lower housing 91, from being excessively bent, as shown in Fig. 22, and makes it possible to prevent breakage of the harness 89.

[0056] At the corners of the bottom wall of the lower housing 91, a round grommet ( No. 1 The lower housing 91 is connected to left and right frames extending in the left and right direction provided at the rear of the vehicle body 10 via grommets 86. ("First left and right frames" in the claims) 22, a predetermined space is formed between the bottom wall of the lower housing 91 and the top wall of the chute 46 of the work machine 4, and the harness 89 connecting the battery 50 and the battery monitoring device 81 can be easily routed by utilizing this space.

[0057] 23, a pair of front and rear right grommets ("right vibration-isolating members" in the claims) 86R provided on the right part of the bottom wall of the lower housing 91 is provided rearward of a pair of front and rear left grommets ("left vibration-isolating members" in the claims) 86L provided on the left part of the bottom wall of the lower housing 91. This makes it possible to prevent the fixing pin 88, which passes through the right grommet 86R and extends downward from the support member 16A, from contacting the upper wall of the chute 46 of the work machine 4.

[0058] The fixing pin 88 inserted into the front left grommet 86L is formed thinner than the fixing pin 88 inserted into the rear left grommet 86L, ​​and the fixing pin 88 inserted into the rear right grommet 86R is formed thinner than the fixing pin 88 inserted into the front left grommet 86L. This makes it possible to easily attach the lower housing 91 to the pair of left and right support members 16A via the fixing pins 88.

[0059] As shown in FIG. 24, the housing of the battery monitoring device 81 ("Second housing" in the claims) The bottom wall of 81A is fitted with round grommets at regular intervals in the front-to-back and left-to-right directions. ("Second vibration-isolating member" in the claims) The housing 81A is connected to the left and right frames 16 at the rear side thereof through the grommets 87. ("Second left and right frames" in the claims) The battery monitoring device 81 is connected to a support frame 18 connected to a support frame 17. This makes it possible to suppress the vibration of the traveling vehicle body 10 that occurs when the work vehicle is traveling from being transmitted to the battery monitoring device 81, thereby preventing damage to the battery monitoring device 81. Also, electric wires connecting the battery monitoring device 81 and the battery 50 can be inserted into the hollow portion formed in the grommet 87, making it easy to arrange the electric wires.

[0060] 25, the base of forward accelerator pedal 70 is rotatably supported on a spindle extending in the left-right direction provided at the rear of support member 72 erected at the front right part of floor 67, and the base of reverse accelerator pedal 71 is rotatably supported on a spindle extending in the left-right direction provided at the middle part in the front-rear direction of support member 72. The rotation angle of forward accelerator pedal 70, which corresponds to the amount of depression of forward accelerator pedal 70, and the rotation angle of reverse accelerator pedal 71, which corresponds to the amount of depression of reverse accelerator pedal 71, are measured by angle sensor 73, such as a potentiometer, provided at the front of support member 72.

[0061] The rotation angle measured by the angle sensor 73 is transmitted to the inverter device 80. As a result, the inverter device 80 increases or decreases the frequency and amplitude of the three-phase AC voltage waveform according to the transmitted rotation angle, thereby enabling the output rotation of the output shaft 30A of the electric motor 30 to be increased or decreased. [Explanation of symbols]

[0062] 1 Running vehicle 2 Front wheels 3 Rear wheel 4 Work equipment 5 Bonnet 6. Control Unit 8 Safety Frame 8A connection Department 16 Left and right frames (First left and right frames) 16A Support member 17 Left and right frames (Second left and right frames) 18 Support frame 30 Electric motor 46 Shooter 50 Battery 58 Protective Frame 58A Connection part 59 Virtual Line 60 Cockpit 62 Steering Wheel 80 Inverter device 80A housing (First unit) 81 Battery monitoring device 81A Housing (Second housing) 86 Grommet ( No. 1 Anti-vibration material) 86L Left grommet (left vibration-proof member) 86R Right grommet (right vibration-proof part) 87 Grommet (second vibration-proof member) 90 Upper case 91 Lower case

Claims

1. A work vehicle having 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 work machine (4) for cutting weeds such as grass on the underside of the traveling body (1), A bonnet section (5) having a predetermined space formed in the front side of the upper surface of the traveling vehicle body (1) is provided, and a control section (6) in which a driver sits is provided behind the bonnet section (5), An electric motor (30) is provided to drive the rear wheel (3); a battery (50) for storing power to be supplied to the electric motor (30) is provided in the bonnet portion (5); A chute (46) is provided for transporting the grass cut by the working machine (4) to a grass collection container (7), Between the chute (46) and the cockpit (60), an inverter device (80) for converting the DC voltage of the battery (50) into an AC voltage and a battery monitoring device (81) for monitoring the charging state of the battery (50), etc. are provided; A battery monitoring device (81) is provided on the rear upper side of the inverter device (80), A work vehicle characterized in that a lower wall of a first housing (80A) of the inverter device (80) is provided above an upper wall of the chute (46) at a predetermined distance.

2. 2. A work vehicle as described in claim 1, wherein the first housing (80A) is connected via a first vibration-isolating member (86) formed of an elastic material to support members (16A) extending in the front-rear direction and provided on both sides of a first left-right frame (16) extending in the left-right direction and located above a chute (46) in the traveling body (1).

3. A work vehicle as described in claim 2, wherein the first vibration-damping member (86) is formed of a pair of front and rear left vibration-damping members (86L) provided on the left portion of the first housing (80A) and a pair of front and rear right vibration-damping members (86R) provided on the right portion of the first housing (80A), and the right vibration-damping member (86R) is provided forward of the left vibration-damping member (86L).

4. A work vehicle as described in claim 2 or 3, wherein a second housing (81A) of the battery monitoring device (81) is connected to a support frame (18) connected to a second left and right frame (17) provided on the rear side of the first left and right frame (16) via a second vibration-damping member (87) formed of an elastic material.

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