Work vehicle

Abstract

To provide a work vehicle provided with electric equipment in which harness connecting work for the electric equipment is easily performed and furthermore a trouble due to water leakage from a terminal in the electric equipment is easily avoided.SOLUTION: A terminal part 36 is formed on the outer periphery of electric equipment 12. The terminal part 36 is located in an inclined posture on an upper portion of the outer periphery of the electric equipment 12 in the vehicle body upward direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a work vehicle. [Background technology]

[0002] As shown in Patent Document 1, there is a work vehicle (multipurpose vehicle) equipped with an electric device (assist motor). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7050421 Summary of the Invention [Problem to be solved by the invention]

[0004] Some of the above-mentioned work vehicles are equipped with electrical equipment having terminals formed on the outer periphery. In this type of work vehicle, it is necessary to connect a harness to the electrical equipment. There is a demand for a work vehicle that makes it easy to connect the harness.

[0005] The present invention provides a work vehicle that makes it easy to connect harnesses to electrical equipment and that makes it easy to avoid problems caused by the terminals of the electrical equipment getting wet. [Means for solving the problem]

[0006] The work vehicle according to the present invention comprises: The vehicle body has an electric device having a terminal portion formed on an outer periphery, and the terminal portion is positioned in an inclined position at a portion of the outer periphery facing upward toward the vehicle body.

[0007] According to this configuration, the harness can be connected to the terminal portion from above the electrical device, making it easy to connect the harness to the electrical device. Even if rainwater or car wash water falls on the terminal portion, the inclination of the terminal portion causes the water to flow out of the terminal portion and water is less likely to accumulate on the terminal portion, making it easy to avoid problems caused by the terminals of the electrical device getting wet.

[0008] In the present invention, It is preferable that a dumpable loading platform is provided, and the electrical equipment is located below the loading platform.

[0009] According to this configuration, by putting the loading platform into the dump position, a large working space can be secured above the terminals to perform maintenance work such as inspection of the terminals, making it easy to perform maintenance work on the terminals.

[0010] The electric device is preferably an electric motor.

[0011] According to this configuration, the cable connection work for the electric motor can be easily performed, and problems caused by the terminals of the electric motor getting wet can be easily avoided.

[0012] In the present invention, It is preferable that a transmission case is provided to which the power of the electric motor is input and which outputs the input power to the running device, and that an endless rotating body is provided which is wound around an output pulley of the electric motor and an input pulley of the transmission case to transmit the power of the output pulley to the input pulley, and that the terminal block portion is in the inclined posture when viewed in a direction along the rotation axis of the output pulley.

[0013] According to this configuration, by rotating the electric motor around the rotation axis of the output pulley, the terminal portion can be positioned in an inclined position on the upper portion of the outer periphery of the electric motor toward the vehicle body without changing the gap between the output pulley and the input pulley or the relative position between the input pulley and the output pulley. The power of the electric motor can be input to the transmission case by a simple transmission structure that only has an endless rotating body, while making it easy to avoid problems caused by the terminal getting wet.

[0014] In the present invention, It is preferable that an inverter connected to the electric motor is provided, the inverter has an inverter terminal portion formed on an outer periphery, and the inverter terminal portion is located in a portion of the outer periphery facing downwardly of the vehicle body.

[0015] According to this configuration, even if rainwater or car wash water falls on the inverter from above, it is difficult for the water to reach the inverter terminals, making it easier to avoid problems caused by the inverter terminals getting wet.

[0016] In the present invention, It is preferable that a cooling fan be provided above the inverter to supply cooling air toward the inverter.

[0017] According to this configuration, even if rainwater or the like enters the cooling fan and flows down to the inverter below, it is difficult for the rainwater to reach the inverter terminals of the inverter, and the inverter can be cooled by the cooling fan. [Brief description of the drawings]

[0018] [Figure 1] FIG. 2 is a side view of the utility vehicle as seen from the left side. [Diagram 2] FIG. 2 is a side view of the utility vehicle as seen from the right side. [Diagram 3] FIG. 2 is a plan view showing a transmission case, an electric motor, an inverter, a first battery, etc. [Figure 4] 4 is a side view of the transmission case, the electric motor, the inverter, and the first battery as viewed from the left side. FIG. [Diagram 5] FIG. [Figure 6] FIG. 2 is a rear view of the inverter and the on-board charging device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, with regard to the traveling body of a multi-purpose vehicle (an example of a "work vehicle"), the direction of arrow F shown in Figures 1 and 2 etc. is the "front side of the body", the direction of arrow B is the "rear side of the body", the direction of arrow U is the "upper side of the body", the direction of arrow D is the "lower side of the body", the direction towards the front of the page in Figure 1, the direction towards the back of the page in Figure 2, and the direction of arrow L shown in Figures 3 and 5 etc. is the "left side of the body", and the direction towards the back of the page in Figure 1, the front of the page in Figure 2, and the direction of arrow R shown in Figures 3 and 5 etc. is the "right side of the body". The left-right direction of the body is the width direction of the body.

[0020] [Overall configuration of multi-purpose vehicle] A utility vehicle shown in Figs. 1 and 2 is used for multiple purposes such as transporting luggage and recreation. The utility vehicle has a traveling body 3 on which a pair of left and right traveling devices, front wheels 1, are provided so as to be steerable and drivable, and a pair of left and right traveling devices, rear wheels 2, are provided so as to be drivable. A driving section 4 on which a driver sits is provided at the front of the traveling body 3. The driving section 4 is provided with a driver's seat 5, a passenger seat 5b aligned with the driver's seat 5, a steering wheel 6 for steering the front wheels 1, a steering wheel 7 surrounding a riding space, and the like. The driver's seat 5 and the passenger seat 5b are located between the front wheels 1 and the rear wheels 2 in a plan view. A cargo bed 8 is provided behind the driving section 4. The loading platform 8 is held on the vehicle body frame 9 in a state in which it can swing up and down around the connecting axis P between the loading platform 8 and the vehicle body frame 9 as a swing axis, and its position can be changed between an upwardly swung dump position and a downwardly swung traveling position by raising and lowering operations using handles 8a provided on both sides of the loading platform 8.

[0021] [Regarding front and rear wheel drive] As shown in Figs. 1, 2 and 3, a transmission case 11, an electric motor 12, an inverter 13 and a first battery 14 are provided on a traveling vehicle body 3, and a front wheel 1 and a rear wheel 2 can be driven. An endless rotating body 17 is wound around an output pulley 15 provided on the electric motor 12 and an input pulley 16 provided on the transmission case 11. The output pulley 15 is provided on the right side of the vehicle body of the electric motor 12. The output pulley 15 is provided rotatably with an output shaft core of the electric motor 12 along the vehicle body width direction as a rotation shaft core 15a. The input pulley 16 is provided on the transmission case 11 on the rear side of the vehicle body from the output pulley 15. The input pulley 16 is provided rotatably with an input shaft core of the transmission case 11 as a rotation shaft core 16a. The rotation shaft core 15a of the output pulley 15 and the rotation shaft core 16a of the input pulley 16 are set parallel to each other. The output pulley 15, the input pulley 16 and the endless rotating body 17 are covered by a cover 19. The cover 19 is omitted in Fig. 3. In this embodiment, the endless rotating body 17 is an endless rotating belt. As the endless rotating body 17, an endless rotating chain can be adopted.

[0022] DC power stored in a first battery 14 is supplied to an inverter 13 and converted into AC power, and the AC power is supplied from the inverter 13 to an electric motor 12 to drive the electric motor 12. The power of the electric motor 12 is transmitted from an output pulley 15 to an input pulley 16 by an endless rotating body 17 and input to the transmission case 11, and the speed is changed by a transmission (not shown) provided inside the transmission case 11. The speed-changed power is output to the left and right rear wheels 2 from a rear wheel differential mechanism (not shown) provided in the transmission case 11. The speed-changed power is output to the left and right front wheels 1 from a front output shaft 18 (see FIGS. 1 and 4) provided in the front part of the transmission case 11.

[0023] 1, 2 and 3, the transmission case 11 is provided below the bed 8 between the left and right rear wheels 2. The transmission case 11 is supported by the body frame 9 via suspension mechanisms 20 (see FIGS. 4 and 5) provided between the left and right side portions of the transmission case 11 and the body frame 9.

[0024] As shown in Figs. 1, 2, 4, and 5, the left and right suspension mechanisms 20 include an upper arm 22 and a lower arm 23 that extend rearwardly from a front holding portion 9a provided on the body frame 9 below the rear portion of the driver's section 4 so as to be able to swing up and down, and a shock absorber 24 whose upper end is connected to the body frame 9 below the loading platform 8. The shock absorber 24 includes a shock absorber and a coil spring. As shown in Fig. 5, the transmission case 11 has rear axle cases 11a that extend from the left and right lateral sides toward the rear wheels 2, and the left and right rear axle cases 11a are connected to the rear wheel support member 26 by connecting members 25, thereby being held by the rear wheel support member 26. The rear end of the upper arm 22 and the rear end of the lower arm 23 are connected to the rear holding portion 26a provided on the rear wheel support member 26, and are connected to the transmission case 11 via the rear holding portion 26a and the rear wheel support member 26. A lower end of the shock absorber 24 is connected to a rear axle case 11 a of the transmission case 11 .

[0025] 1, 2, and 3, first battery 14 is provided across the space below driver's seat 5 and the space below passenger seat 5a aligned alongside driver's seat 5. First battery 14 is provided in a mounting position such that length L1 in the vehicle width direction is longer than length L2 in the vehicle front-rear direction.

[0026] As shown in Figures 1, 2 and 3, the electric motor 12 is provided below the cargo bed 8. As shown in Figures 1, 3 and 4, the electric motor 12 is provided in a space between a pair of left and right rear wheels 2, rearward of the first battery 14 and forward of the transmission case 11. As shown in Figures 3, 4 and 5, one end of the electric motor 12 in the vehicle width direction is attached to a first stay 27 extending from the transmission case 11, and the other end of the electric motor 12 in the vehicle width direction is attached to a second stay 28 rising from the rear wheel support member 26. The electric motor 12 is held by the rear wheel support member 26 via the first stay 27, the transmission case 11 and the second stay 28.

[0027] 1, 3 and 4, the inverter 13 is provided in a space located rearward of the first battery 14 and forward of the electric motor 12, within the lateral width of the first battery 14. As shown in FIG. 6, the inverter 13 is attached to an inverter holder 29 extending rearward from the partition plate 10. The partition plate 10 is configured to separate the passenger space of the driver's section 4 from the space below the cargo bed 8, and is held by the vehicle frame 9. The inverter 13 is held by the vehicle frame 9 via the inverter holder 29 and the partition plate 10.

[0028] As shown in FIGS. 4 and 6, a cooling fan 30 is provided above the inverter 13. The cooling fan 30 is rotatably held inside a fan case 31 held by a top plate portion 29a of the inverter holder 29. The cooling fan 30 is configured to draw air from the outside to the inside of the fan case 31 through an air intake port 31a opened in the fan case 31 to generate cooling air, and to supply the generated cooling air from a through hole 29b provided in the top plate portion 29a to a heat dissipation fin portion 13a provided on an upper portion of the inverter 13 to cool the heat dissipation fin portion 13a. The cooling fan 30 cools the inverter 13 by cooling the heat dissipation fin portion 13a.

[0029] As shown in Fig. 3, an on-vehicle charging device 32 is provided in a space located rearward of the first battery 14 and forward of the electric motor 12 within the width of the first battery 14. As shown in Figs. 3 and 6, the on-vehicle charging device 32 is arranged to be aligned with the inverter 13 in the width direction of the vehicle. The on-vehicle charging device 32 includes an on-vehicle charger 32a, a DCDC converter 32b, and a charging case 32c that houses the on-vehicle charger 32a and the DCDC converter 32b. The charging case 32c includes a cooling fan unit 32d that supplies cooling air to the on-vehicle charger 32a and the DCDC converter 32b.

[0030] 3, charging port 33 is provided on the opposite side of on-board charging device 32 from the side where inverter 13 is located in the vehicle width direction, and on the vehicle body forward side of rear wheel 2 and outboard of on-board charging device 32. As shown in FIG. 1, charging port 33 is provided on rear wheel fender 34 and held by holder portion 34a.

[0031] A charging cord from a power source such as a charging stand outside the vehicle is connected to the charging port 33. Then, power from the power source outside the vehicle is supplied to the on-board charger 32a through the charging port 33, and is then supplied from the on-board charger 32a to the first battery 14 for charging. The power supplied to the on-board charger 32a is supplied to the DCDC converter 32b for voltage adjustment, and the voltage-adjusted power is supplied from the DCDC converter 32b to the second battery 35 described below for charging.

[0032] 2 and 3, a second battery 35 is provided on the opposite side of the inverter 13 in the vehicle width direction from the side where the on-board charging device 32 is located, and further forward than the rear wheels 2 and laterally outboard of the inverter 13. The second battery 35 outputs power with a lower voltage than the power output by the first battery 14 for control purposes, etc.

[0033] [Electric motors and inverters] 3, 4, 5, and 6, a terminal portion 36 is formed on the outer periphery of the electric motor 12, and an inverter terminal portion 37 is formed on the outer periphery of the inverter 13. A harness 38 connects a plurality of motor terminals 36a provided on the terminal portion 36 to a predetermined inverter terminal 37a among a plurality of inverter terminals 37a provided on the inverter terminal portion 37, thereby connecting the electric motor 12 to the inverter 13. In the present embodiment, an example has been shown in which the terminal portion 36 of the electric motor 12 is configured with a base having a terminal block on which the motor terminals 36a are arranged, but the terminal block may not be provided.

[0034] As shown in Figures 3 and 4, the electric motor 12 is held by the rear wheel support member 26 in a mounting position in which the terminal portion 36 provided on the outer periphery is positioned in an inclined position toward the upper part of the outer periphery facing the vehicle body.

[0035] In more detail, when the electric motor 12 is rotated around the rotation axis 15a of the output pulley 15, which is the output shaft of the electric motor 12, and the electric motor 12 is rotated in a rotational position in which the terminal portion 36 is inclined downward toward the rear at a portion of the outer periphery of the electric motor 12 facing upward toward the vehicle body, the electric motor 12 is attached to the first stay 27 and the second stay 28 so that this rotational position becomes the mounting position, and the electric motor 12 is held by the rear wheel support member 26 in a state in which the terminal portion 36 is inclined downward toward the rear at a portion of the outer periphery facing upward toward the vehicle body. The terminal portion 36 is inclined downward toward the rear when viewed in a direction along the rotation axis 15a of the output pulley 15. In this embodiment, the rotation axis 15a of the output pulley 15 is aligned with the vehicle body width direction. In this embodiment, the terminal portion 36 is inclined downward toward the rear, but it is possible to make it inclined downward toward the front by changing the direction in which the electric motor 12 is rotated.

[0036] 1 and 2, the electric motor 12 is provided below the loading platform 8. By putting the loading platform 8 in the dump position, a large working space that can be used for maintenance work is created above the terminals 36, making it easy to perform the work. Even if rainwater or car wash water gets on the terminals 36, it is easy for the water to flow down from the terminals 36 due to the inclined position of the terminals 36.

[0037] 4 and 6, the inverter 13 is attached to the inverter holder 29 in a mounting position in which the inverter terminal portion 37 is located at a portion of the outer periphery facing downwards of the vehicle body. The inverter 13 is held by the vehicle body frame 9 in a mounting position in which the inverter terminal portion 37 is located at a portion of the outer periphery facing downwards of the vehicle body. Even if rainwater or car wash water falls on the inverter 13 from above, it is unlikely to reach the inverter terminal portion 37, and therefore the inverter terminal portion 37 is unlikely to get wet.

[0038] [Another embodiment] (1) In the above embodiment, an example was shown in which the terminal portion 36 of the electric motor 12 is positioned in an inclined position at a portion of the outer periphery of the electric motor 12 facing upward toward the vehicle body. However, the object on which the terminal portion is positioned in this manner is not limited to the electric motor 12, and may be various types of electrical equipment such as an inverter, a converter, or an on-board charger.

[0039] (2) In the above embodiment, the terminal portion 36 is inclined downward toward the rear. However, the present invention is not limited to this and may be inclined downward toward the front, left, or right.

[0040] (3) In the above embodiment, the rotational axis 15a of the output pulley 15 and the rotational axis 16a of the input pulley 16 are aligned along the width direction of the vehicle body, but they may be aligned along the fore-aft direction of the vehicle body.

[0041] (4) In the above embodiment, an example was shown in which the loading platform 8 can be dumped. However, the loading platform 8 may not be dumpable.

[0042] (5) In the above embodiment, an example was shown in which the inverter terminal portion 37 of the inverter 13 is located in a portion of the outer periphery of the inverter 13 facing downward on the vehicle body. However, this is not limited to this, and the inverter terminal portion 37 may be located in any portion of the outer periphery, such as a portion facing upward on the vehicle body behind the outer periphery, or a portion facing backward or forward on the vehicle body. [Industrial Applicability]

[0043] The present invention can be applied to a work vehicle equipped with an electric motor for driving a traveling device, such as a multi-purpose vehicle or a tractor. [Explanation of symbols]

[0044] 1 Front wheels (running gear) 2 Rear wheels (running gear) 8 Cargo Bed 11 Mission case 12 Electric motors (electrical equipment) 13 Inverter 15 Output pulley 16 Input pulley 17 Endless rotating body 30 Cooling fan 36 Terminal section 37 Inverter terminal section

Claims

1. The terminal portion is formed on an outer periphery of an electric device. The terminal portion is located in an inclined position at a portion of the outer periphery facing upward toward the vehicle body.

2. It is equipped with a dumpable loading platform, 2. The work vehicle according to claim 1, wherein the electrical equipment is located under the loading platform.

3. 3. The work vehicle according to claim 1, wherein the electric device is an electric motor.

4. a transmission case is provided to which the power of the electric motor is input and which outputs the input power to a traveling device; an endless rotating body is provided which is wound around an output pulley of the electric motor and an input pulley of the transmission case and transmits the power of the output pulley to the input pulley; The work vehicle according to claim 3 , wherein the terminal portion is inclined when viewed in a direction along the rotation axis of the output pulley.

5. an inverter connected to the electric motor; the inverter has an inverter terminal portion formed on an outer periphery, 4. The work vehicle according to claim 3, wherein the inverter terminal portion is located at a portion of the outer periphery that faces downwardly of the vehicle body.

6. 6. The work vehicle according to claim 5, further comprising a cooling fan disposed above the inverter for supplying cooling air toward the inverter.

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