Electric Tractor

Abstract

To provide a motor-driven tractor which can facilitate charging of a battery.SOLUTION: A motor-driven tractor includes a vehicle body equipped with a driver seat and a steering part, a travel device, an engine hood, an electric motor, a battery and a charging connector. The steering part has a cover body that covers a lower part side of an operation member including a steering handle. The cover body is positioned at the rear side of the engine hood so as to protrude above a floor where the operator's feet are placed. The steering handle is located at the back surface upper part of the cover body. The charging connector includes: a connector body that is located on the front side with respect to the center of the steering handle and has a connection terminal part; a cap that covers the connection terminal part side of the connector body in an openable / closable manner; and a wiring terminal part. The cap has a pivoting part and is attached to the connector body such that the pivoting part rotates around the axis. The wiring terminal part is connected to connection wiring that connects between the charging connector and the battery, and is arranged in the cover body so as to protrude to the back surface of the connector body.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an electric tractor. [Background technology]

[0002] 2. Description of the Related Art Conventionally, an electric tractor disclosed in Patent Document 1 is known.

[0003] The electric tractor disclosed in Patent Document 1 is a tractor in which a traveling device that supports a vehicle body so that it can travel is driven by an electric motor. The electric tractor is provided with a battery that supplies power to the electric motor and a charging connector for charging the battery. The battery can be charged by connecting a power supply connector provided on an external power supply facility to the charging connector. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-68177 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the electric tractor disclosed in Patent Document 1, the charging connector is provided at the back of a cylinder holder having a key cylinder into which a starter key is inserted, making it cumbersome to charge the battery.

[0006] In view of the above problems, the present invention has an object to provide an electric tractor having a charging connector provided in a driving section, which allows easy charging of the battery. [Means for solving the problem]

[0007] An electric tractor according to one aspect of the present invention comprises a driving section including a driver's seat and a control section provided around the driver's seat, a vehicle body on which the driving section is mounted, a traveling device that supports the vehicle body so that it can travel, an electric motor that drives the traveling device, a battery that supplies power to the electric motor, a charging connector for charging the battery, a floor provided in front of and below the driver's seat on which an operator places his / her feet, and a bonnet that is located in front of the driver's seat and forward of the floor, wherein the vehicle body has a body frame located below the bonnet, the battery is located above the body frame and below the bonnet, and the control section comprises an operating member including a steering handle, and a cover body that covers a lower side of the operating member. the cover body protruding above the floor and positioned behind the bonnet, the steering handle being positioned on the upper back surface of the cover body, the charging connector being positioned forward of the center of the steering handle, and the charging connector having a connector main body having a connection terminal portion, a cap that opens and closes and covers the connection terminal portion side of the connector main body, and a wiring terminal portion, the connector main body being positioned outward in the vehicle width direction from the steering handle, the cap having a pivot portion and attached to the connector main body so that the pivot portion rotates about an axis, and the wiring terminal portion is connected to a connection wiring that connects the charging connector and the battery, and protrudes from the back surface of the connector main body and is positioned within the cover body.

[0008] The side of the cover body may be open so that a foot can be placed on the floor below the charging connector during charging.

[0009] The charging connector may be disposed on an outer surface side of the cover body and exposed outwardly of the control unit.

[0010] The driving unit has, as the control unit, a front control unit arranged in front of the driver's seat and a side control unit arranged to the side of the driver's seat, and the charging connector may be arranged in the same direction in the vehicle width direction as the side control unit, based on the steering handle.

[0011] The vehicle may include a pedal disposed on the floor for shifting the gears of the traveling device, and the charging connector may be disposed above the pedal and further inward than the outermost part of the floor in the vehicle width direction.

[0012] The charging connector may be arranged on a side surface of the cover body so as to face outward in a vehicle width direction.

[0013] The charging connector may be disposed on an upper portion of an outer surface of the cover body.

[0014] The charging connector may be disposed on the outer surface of the cover body at approximately the same height as a seat portion of the driver's seat.

[0015] An electric tractor according to another aspect of the present invention comprises a driving section including a driver's seat and a control section provided around the driver's seat, a vehicle body on which the driving section is mounted, a traveling device that supports the vehicle body so that it can travel, an electric motor that drives the traveling device, a battery that supplies power to the electric motor, a charging connector for charging the battery, a connector bracket to which the charging connector is attached, a floor provided in front of and below the driver's seat on which an operator places his / her feet, and a bonnet that is located in front of the driver's seat and in front of the floor, wherein the vehicle body has a body frame located below the bonnet, the battery is located above the body frame and below the bonnet, and the control section comprises a steering operation member that is located in front of the driver's seat, and a steering operation member that is connected to the steering operation member. and a front cover covering the lower side of the bonnet material, the front cover protruding above the floor and being positioned behind the bonnet, the steering operating member including a steering handle positioned at the upper back surface of the front cover, the charging connector being positioned forward of the center of the steering handle and having a connector body having a connection terminal portion, a cap that closes and closes the connection terminal portion side of the connector body, and a wiring terminal portion, the connector body being positioned outward in the vehicle width direction from the steering handle, the cap having a pivot portion and being attached to the connector body so that the pivot portion rotates about an axis, and the wiring terminal portion is connected to a connection wiring that connects the charging connector and the battery, and protrudes from the back surface of the connector body and is positioned within the front cover. Effect of the Invention

[0016] According to the electric tractor described above, the charging connector for charging the battery that supplies power to the electric motor for traveling is positioned on the outer surface of the cover body of the control unit and exposed to the outside of the control unit, making it easy to charge the battery. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic side view of an electric tractor. [Diagram 2] FIG. 1 is a schematic plan view of an electric tractor. [Diagram 3] 4 is a side view showing the configuration of a battery support portion and an inverter support portion. FIG. [Figure 4] FIG. 2 is a perspective view showing the configuration of a battery support portion and an inverter support portion. [Diagram 5] FIG. 2 is a perspective view of a vehicle body frame and a support frame. [Figure 6] FIG. 2 is a perspective view of a vehicle body frame and a rear frame portion. [Figure 7] FIG. [Figure 8] FIG. 4 is a perspective view of the battery support portion as viewed from above. [Figure 9] 4 is a perspective view of the battery support portion as viewed from below. FIG. [Figure 10] FIG. 4 is a perspective view of the inverter support portion as viewed from above. [Figure 11] 4 is a perspective view of the inverter support portion as viewed from below. FIG. [Figure 12] FIG. 2 is a side view showing the positional relationship between the electric motor and the inverter. [Figure 13] FIG. 2 is a perspective view showing a structure for transmitting power from an electric motor to a hydraulic pump. [Figure 14] 2 is a perspective view of mounted components mounted on a front portion of a vehicle body frame, as viewed from diagonally forward right. FIG. [Figure 15] 2 is a perspective view of mounted components mounted on the front part of the vehicle body frame, as viewed from diagonally rear left. FIG. [Figure 16] 1 is a perspective view of the front part of the driver's section as seen from diagonally rear right. [Figure 17] FIG. [Figure 18] FIG. [Figure 19] FIG. [Figure 20] FIG. 2 is an exploded perspective view showing the mounting structure of the charging connector. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] Fig. 1 is a schematic side view showing the overall configuration of an electric tractor 1 according to this embodiment. Fig. 2 is a schematic plan view of the electric tractor 1. The electric tractor 1 is a tractor in which a traveling device 3 that supports a vehicle body 2 so that the vehicle can travel is driven by an electric motor 4.

[0020] In this embodiment, the direction of the arrow A1 in Fig. 1 and Fig. 2 (the forward direction of the electric tractor 1) is the front, the direction of the arrow A2 in Fig. 1 and Fig. 2 (the backward direction of the electric tractor 1) is the rear, and the direction of the arrow A3 in Fig. 1 and Fig. 2 is the front-rear direction. Therefore, the back side in Fig. 1 (the direction of the arrow B1 in Fig. 2) is the left side, and the front side in Fig. 1 (the direction of the arrow B2 in Fig. 2) is the right side. Also, the direction of the arrow B3 in Fig. 2 is the vehicle width direction (the width direction of the electric tractor 1). The direction from the center of the vehicle width direction of the electric tractor 1 to the left or right is described as the vehicle width direction outward. In other words, the vehicle width direction outward is the direction away from the center of the electric tractor 1 in the vehicle width direction. Also, the opposite direction to the vehicle width direction outward is described as the vehicle width direction inward. In other words, the vehicle width direction inward is the direction approaching the center of the electric tractor 1 in the vehicle width direction.

[0021] 1 and 2, the electric tractor 1 has a driver protection device, a ROPS 5. In other words, the electric tractor 1 is a type of electric tractor 1 that does not have a cabin surrounding the driver's seat 6.

[0022] As shown in Figs. 1 and 2, the electric tractor 1 has a vehicle body 2 supported by a traveling device 3 so as to be capable of traveling. The traveling device 3 is configured with left and right front wheels 3A disposed at the front of the electric tractor 1, and left and right rear wheels 3B disposed at the rear of the electric tractor 1. The front wheels 3A are steered wheels. The rear wheels 3B are covered by a fender 7. The traveling device 3 is not limited to a wheel type traveling device 3, and may be a crawler type traveling device 3.

[0023] As shown in FIG. 1, the vehicle body 2 has an electric motor 4, a vehicle body frame 8, and a transmission case 9. The electric motor 4 is a power source that drives the traveling device 3. The electric motor 4 is disposed in front of the driver's seat 6 and a front steering unit 11A described later, in the center of the vehicle width direction of the electric tractor 1. The vehicle body frame 8 protrudes forward from the electric motor 4 and is supported by the left and right front wheels 3A. The transmission case 9 is disposed behind the electric motor 4 with a gap therebetween, and is supported by the left and right rear wheels 3B. The transmission case 9 is configured to have, for example, a transmission case, a differential case, and the like. The transmission case 9 accommodates a speed change device that changes the speed of the rotational power transmitted from the electric motor 4 via the transmission shaft 15, a transmission mechanism that transmits the power changed in speed by the speed change device to the rear wheels 3B, and a power take-off mechanism that takes out the changed power to be transmitted to the front wheels 3A. The electric motor 4, the vehicle body frame 8 and the transmission case 9 are interconnected by a connecting frame (not shown).

[0024] The rear of the transmission case 9 is equipped with a mounting mechanism (not shown) such as a three-point link mechanism for detachably connecting a working machine, and a hydraulic mechanism for raising and lowering the mounting mechanism (working machine).

[0025] The vehicle body 2 is equipped with a driver's seat 6 and a driver's section 10 including the area surrounding the driver's seat 6. The area surrounding the driver's section 10 is open. The driver's seat 6 is disposed above a transmission case 9 and is supported by the transmission case 9. The driver's seat 6 has a seat section 6A on which an operator sits and a backrest section 6B that protrudes upward from the rear of the seat section 6A and supports the back of the operator. The driver's section 10 has a control section (front control section) 11A disposed in front of the driver's seat 6 and control sections (side control sections) 11B disposed to the left and right of the driver's seat 6.

[0026] The front control section 11A includes a steering handle 12 for steering the left and right front wheels 3A. The side control section 11B has an operating lever (operating member) 13 and a cover body 14 for covering the lower side of the operating lever 13. The operating lever 13 can be, for example, a sub-speed change lever for changing the speed of a sub-speed change mechanism of the transmission, a PTO lever for operating a PTO shaft for transmitting power to a working machine mounted at the rear of the electric tractor 1, a position lever for setting the vertical position of the working machine, a steering control lever for operating the working machine, etc.

[0027] A floor 16 on which the operator places his / her feet is provided in front of and below the driver's seat 6. A speed change pedal 17 for changing the speed of the traveling device 3 is disposed on the right side of the floor 16.

[0028] 1 and 2, the electric tractor 1 includes a battery 18 that supplies power to the electric motor 4, and an inverter 19 that converts DC power from the battery 18 into AC power and supplies it to the electric motor 4. The battery 18 is a battery 18 for traveling.

[0029] 1 to 4, the battery 18 is disposed above the electric motor 4 and above the vehicle body frame 8. More specifically, the battery 18 is disposed above the electric motor 4 and the vehicle body frame 8 so as to overlap with the electric motor 4 and the vehicle body frame 8 in the up-down direction (in a plan view). The battery 18 is covered by an openable and closable bonnet 20 disposed in front of the driver's seat 6. The vehicle body frame 8 is disposed below the bonnet 20.

[0030] As shown in Fig. 2, the electric motor 4 is disposed below the rear side of the battery 18, with its rear part protruding rearward beyond the battery 18. As shown in Fig. 3, a connector (motor side connector) 4A is provided on the front side of the electric motor 4. In this embodiment, the motor side connector 4A is a three-phase connector. The motor side connector 4A is provided on the front lower part of the electric motor 4 (lower part on the front side).

[0031] As shown in FIG. 3, the inverter 19 is disposed between the battery 18 (a battery support portion 24 described later) and the body frame 8 and in front of the electric motor 4. The inverter 19 is disposed so as to overlap the electric motor 4 in the front-rear direction. More specifically, the inverter 19 is disposed so that an inverter body 19A overlaps with an upper portion of the electric motor 4 in the front-rear direction. The inverter 19 is also disposed below the front portion of the battery 18 so as to overlap with the battery 18 in the up-down direction. A connector (inverter side connector) 19B is provided on the lower side of the inverter 19, which is connected to the motor side connector 4A by wiring (three-phase wiring, see FIG. 12) 21. In this embodiment, the inverter side connector 19B is a three-phase connector. The inverter side connector 19B is provided on the lower surface side of the rear portion of the inverter 19, and protrudes downward from the inverter body 19A.

[0032] 3, 4 and 5, the electric tractor 1 has a support frame 22 attached to the vehicle body frame 8. The battery 18 and the inverter 19 are attached to and supported by this support frame 22.

[0033] 6, the body frame 8 is mainly composed of a first side plate 8A, a second side plate 8B, and a front plate 8C. The first side plate 8A and the second side plate 8B are arranged so that their plate surfaces face the vehicle width direction, and are arranged side by side with a gap between them in the vehicle width direction.

[0034] 4, the first side plate 8A protrudes forward from one side in the vehicle width direction of the electric motor 4. The second side plate 8B extends forward from the other side in the vehicle width direction of the electric motor 4 and faces the first side plate 8A in the vehicle width direction.

[0035] The front plate 8C is disposed so that its plate surface faces the front-rear direction, and is fixed to the front portions of the first side plate 8A and the second side plate 8B. More specifically, the front plate 8C is provided across from the front end of the first side plate 8A to the front end of the second side plate 8B, and connects the front ends of the first side plate 8A and the second side plate 8B together.

[0036] The vehicle body frame 8 also has connecting plates 8D, 8E and reinforcing plates 8F, 8G. A plurality of connecting plates 8D, 8E are provided, and the plurality of connecting plates include a front connecting plate 8D and a rear connecting plate 8E. The front connecting plate 8D is arranged so that its plate surface faces the vertical direction, and connects the lower ends of the front parts of the first side plate 8A and the second side plate 8B to each other behind the front plate 8C. The rear connecting plate 8E is arranged so that its plate surface faces the vertical direction, and connects the vertical middle parts of the first side plate 8A and the second side plate 8B to each other behind the front connecting plate 8D. A rear cutout portion 8Ea that is open to the rear is formed at the rear part of the rear connecting plate 8E to prevent interference with the motor side connector 4A of the electric motor 4. The reinforcing plate 8F is arranged on one end side of the rear connecting plate 8E and above the rear connecting plate 8E, and is fixed to the inside of the first side plate 8A. The reinforcing plate 8G is disposed on the other end side of the rear connecting plate 8E and above the rear connecting plate 8E, and is fixed to the inner side of the second side plate 8B.

[0037] As shown in FIG. 5, the support frame 22 has a rear frame portion (frame member) 23, a battery support portion 24, and an inverter support portion 25.

[0038] As shown in FIGS. 6 and 7, the rear frame portion 23 has a main frame 26, an upper frame 27, and a support portion .

[0039] The main frame 26 has a first support member 29, a second support member 30, and a connecting frame body 31. The first support member 29 constitutes one side of the main frame 26 in the vehicle width direction. The second support member 30 constitutes the other side of the main frame 26 in the vehicle width direction. The connecting frame body 31 connects the first support member 29 and the second support member 30. The connecting frame body 31 has a first vertical member 31A fixed to the front side of the first support member 29, a second vertical member 31B fixed to the front side of the second support member 30, a first horizontal member 31C connecting the upper parts of the first vertical member 31A and the second vertical member 31B, and a second horizontal member 31D connecting the middle parts of the first vertical member 31A and the second vertical member 31B. As shown in FIG. 5, a restricting plate 32 including a restricting portion 32a protruding forward from the second support member 30 is fixed to the upper portion of the second support member 30.

[0040] 7, a mounting plate 33 is fixed to the upper rear surface of the first support member 29 and the upper rear surface of the second support member 30 in a rearward protruding manner. The mounting plate 33 has a vertical plate portion 33a arranged with its plate surface facing the vehicle width direction, and an extending plate portion 33b extending inward in the vehicle width direction from the upper end of the vertical plate portion 33a.

[0041] 6 and 7, the upper frame 27 is attached onto the first horizontal member 31C. The upper frame 27 is provided with a support pin 34 that supports the upper part of the rear side of the bonnet 20 so as to be rotatable about an axis extending in the vehicle width direction.

[0042] The support portion 28 has a support plate 35 protruding forward from the lower portion of the main frame 26, and a support leg 36 provided on the lower surface side of the support plate 35. The support plate 35 has a main plate portion 35a arranged so that the plate surface faces the up-down direction, and an extension plate portion 35b extending downward from the front end of the main plate portion 35a. As shown in FIG. 3, the support plate 35 is disposed above the electric motor 4. Reinforcing plates 37 are fixed to the left and right of the lower surface of the main plate portion 35a. The support legs 36 are provided on the left and right of the lower surface side of the front part of the support plate 35, respectively. The support legs 36 are fixed to the vehicle body frame 8. More specifically, the left support leg 36L is fixed to the rear upper end side of the first side plate 8A, and the right support leg 36R is fixed to the rear upper end side of the second side plate 8B.

[0043] The rear portion of the support portion 28 (support plate 35) is supported on the vehicle body 2 via a support member.

[0044] 8 and 9, the battery support section 24 has a mounting plate 38 on which the battery 18 is placed, and an attachment bracket 39 protruding downward from the mounting plate 38. As shown in Fig. 3, the mounting plate 38 has a plate surface facing up and down and is disposed above the electric motor 4 and the body frame 8, with its rear portion placed on and overlapping the support plate 35. Therefore, the rear portion of the mounting plate 38 (the rear portion of the battery support section 24) is supported by the support section 28. The rear end side of the mounting plate 38 is attached to the support plate 35 by bolts or the like.

[0045] As shown in Fig. 8 and Fig. 9, a first side plate 41 extending in the front-rear direction is fixed to one side of the mounting plate 38 in the vehicle width direction, a second side plate 42 extending in the front-rear direction is fixed to the other side of the mounting plate 38 in the vehicle width direction, a front plate 43 extending in the vehicle width direction is fixed to the front of the mounting plate 38, and a rear plate 44 extending in the vehicle width direction is fixed to the rear of the mounting plate 38. The first side plate 41, the second side plate 42, and the front plate 43 have their plate surfaces fixed at their vertical midpoints to the ends of the mounting plate 38 and protrude vertically from the mounting plate 38. The rear plate 44 is fixed to the upper surface of the mounting plate 38. The rear movement of the battery 18 mounted on the mounting plate 38 is restricted by the rear plate 44, and the battery 18 is detachably attached to the first side plate 41, the second side plate 42, and the front plate 43 by bolts or the like. The battery 18 is also fixed to a restricting portion 32a of a restricting plate 32 on the upper portion of the second support member 30 by means of bolts or the like (see FIG. 3).

[0046] As shown in Figs. 8 and 9, in this embodiment, a plurality of mounting brackets 39 are provided and arranged on the lower side of the mounting plate 38. Specifically, the plurality of mounting brackets 39 include a first bracket 39A arranged in a middle part in the front-rear direction on the inside of the first side plate 41, a second bracket 39B arranged in a middle part in the front-rear direction on the inside of the second side plate 42, a third bracket 39C arranged in a left part on the inside of the front plate 43, and a fourth bracket 39D arranged in a right part on the inside of the front plate 43. In this embodiment, the first bracket 39A and the second bracket 39B are formed of channel steel, and the third bracket 39C and the fourth bracket 39D are formed of angle steel. However, this is not limited to this.

[0047] The first bracket 39A to the fourth bracket 39D are attached to the first side plate 41, the second side plate 42, and the front plate 43 via a mounting frame 45. The mounting frame 45 has a first plate member 45A attached to the inside of the first side plate 41 by bolts or the like, a second plate member 45B attached to the inside of the second side plate 42 by bolts or the like, and a third plate member 45C attached to the inside of the front plate 43 by bolts or the like. The first bracket 39A is fixed to the rear of the first plate member 45A, the second bracket 39B is fixed to the rear of the second plate member 45B, the third bracket 39C is fixed to the left part of the third plate member 45C, and the fourth bracket 39D is fixed to the right part of the third plate member 45C.

[0048] As shown in FIGS. 3 and 5, the inverter support portion 25 is disposed below the front portion of the mounting plate and fixed to the vehicle body frame 8, and supports the front portion of the mounting plate .

[0049] As shown in Figs. 10 and 11, the inverter support 25 has a support plate 46 and a support stay 47 protruding upward from the support plate 46. The support plate 46 is disposed below the mounting plate 38 with a gap therebetween (see Fig. 3). The support plate 46 is disposed so that its plate surface faces the up-down direction, and is provided across the upper end of the first side plate 8A and the upper end of the second side plate 8B. A notch 46a that is open forward is formed in the front part of the support plate 46. A notch 46b that is open backward is formed in the rear part of the support plate 46. The left part of the support plate 46 protrudes leftward from the first side plate 8A. The right part of the support plate 46 protrudes rightward from the second side plate 8B. A fixture 48 is fixed to the front and rear parts of the lower surface side of the protruding part of the right part of the support plate 46. A similar fixture 48 is fixed to the lower surface side of the protruding part of the left part of the support plate 46. The mounting fixture 48 on the left side of the support plate 46 is attached to the first side plate 8A with a bolt or the like, and the mounting fixture 48 on the right side of the support plate 46 is attached to the second side plate 8B with a bolt or the like. In this way, the inverter support part 25 is attached to the vehicle body frame 8.

[0050] A plurality of support stays 47 are provided. The plurality of support stays 47 include a first stay 47A, a second stay 47B, a third stay 47C, and a fourth stay 47D. In this embodiment, the first stay 47A and the second stay 47B are formed by channel steel, and the third stay 47C and the fourth stay 47D are formed by angle steel. This is not limited to this. The first stay 47A is fixed to a position corresponding to the mounting fixture 48 at the rear of the left part of the support plate 46. The second stay 47B is fixed to a position corresponding to the mounting fixture 48 at the rear of the right part of the support plate 46. The third stay 47C is fixed to a position corresponding to the mounting fixture 48 at the front of the left part of the support plate 46. The fourth stay 47D is fixed to a position corresponding to the mounting fixture 48 at the front of the right part of the support plate 46.

[0051] The first bracket 39A is attached to the first stay 47A, the second bracket 39B is attached to the second stay 47B, the third bracket 39C is attached to the third stay 47C, and the fourth bracket 39D is attached to the fourth stay 47D (see FIGS. 3, 4, and 5). As a result, the battery support part 24 is attached to the inverter support part 25 so that a space in which the inverter 19 can be disposed is formed between the mounting plate 38 and the support plate 46.

[0052] The inverter main body 19A is placed on the support plate 46 and is attached to the support plate 46 so that its position in the front-rear direction can be adjusted. The inverter-side connector 19B is provided on the underside of the front part of the inverter 19, protruding downward from the inverter main body 19A and also protruding downward from the support plate 46 (inverter support portion 25) via a cutout portion 46a.

[0053] 3 and 12, the motor side connector 4A and the inverter side connector 19B are disposed between the first side plate 8A and the second side plate 8B. With this configuration, the motor side connector 4A, the inverter side connector 19B, and the wiring 21 can be protected by the first side plate 8A and the second side plate 8B. In addition, the motor side connector 4A, the inverter side connector 19B, and the wiring 21 can be prevented from being damaged, and reliability can be improved.

[0054] As shown in FIG. 12, the wiring connection port of the motor side connector 4A faces forward, and the wiring connection port of the inverter side connector 19B faces backward. That is, the motor side connector 4A and the inverter side connector 19B face each other in the front-rear direction. Also, the motor side connector 4A and the inverter side connector 19B are arranged so as to overlap in the front-rear direction. Therefore, the motor side connector 4A and the inverter side connector 19B can be connected via a short path, which can suppress heat generation in the wiring 21 and improve the efficiency of the system. Also, by shortening the wiring 21, costs can be reduced. Also, since the wiring 21 is short and bending can be minimized, the possibility of the wiring 21 being damaged by external factors can be reduced, and reliability can be improved.

[0055] 12, a water pump 94 is attached to the front connecting plates 8D, 8E of the body frame 8. The water pump 94 is a pump that circulates cooling water that cools the electric motor 4, the inverter 19, a voltage converter (described later), and the like.

[0056] As shown in Figures 3 and 4, a hydraulic pump P1 driven by the electric motor 4 is disposed to the side of the electric motor 4. The hydraulic pump P1, for example, sucks in oil in a transmission case 9 and supplies the oil as hydraulic oil to each hydraulic drive unit. As shown in Figure 13, a power transmission mechanism 49 is provided on the rear side of the electric motor 4 and the hydraulic pump P1, and power is transmitted from the electric motor 4 to the hydraulic pump P1 by this power transmission mechanism 49. As shown in Figure 4, the power transmission mechanism 49 is covered by a cover case 61. The cover case 61 is formed in a forward open shape.

[0057] As shown in FIG. 13, the power transmission mechanism 49 is configured by a gear transmission mechanism. The power transmission mechanism 49 has an output gear 51 that is connected to the output shaft of the electric motor 4 and rotates, an input gear 52 that is connected to the input shaft of the hydraulic pump P1, and one or more transmission gears 53 that are arranged between the output gear 51 and the input gear 52 and transmit power from the output gear 51 to the input gear 52. The output gear 51, the input gear 52, and the transmission gear 53 are formed by spur gears and rotate around an axis extending in the front-rear direction. However, the present invention is not limited to this. In this embodiment, a plurality of transmission gears 53 are provided, and the plurality of transmission gears 53 are configured to have three gears: a first gear 53A that meshes with the output gear 51, a second gear 53B that meshes with the first gear 53A, and a third gear 53C that meshes with the second gear 53B and the input gear 52.

[0058] As shown in Figures 14 and 15, in front of the battery support portion 24, at the front of the body frame 8, a radiator R1, a voltage converter (DCDC converter) C1, an auxiliary battery BT, a reserve tank R2, a cooling fan unit F1, an oil cooler O1, etc. are attached and supported.

[0059] As shown in Fig. 14, the radiator R1, the voltage converter C1, and the auxiliary battery BT are arranged in the vehicle width direction from the left. The reserve tank R2 is arranged above the auxiliary battery BT. As shown in Fig. 15, the cooling fan device F1 is arranged behind the radiator R1, and the oil cooler O1 is arranged behind the cooling fan device F1.

[0060] The radiator R1 is a heat sink that cools the cooling water circulated by the water pump 94 with cooling air generated by the cooling fan device F1. The voltage converter C1 is a device that steps down the power sent from the battery 18 and supplies it to the auxiliary battery BT. The auxiliary battery B1 is a storage battery that supplies power to the cooling fan device F1, a control device that controls electrical equipment such as the inverter 19 and the electric motor 4, and various electrical equipment such as lamps. The reserve tank R2 is a tank that stores the cooling water that escapes from the radiator R1 when the temperature is high. The oil cooler O1 is a heat sink that cools the hydraulic oil that operates hydraulic equipment and the like with cooling air generated by the cooling fan device F1.

[0061] As shown in Figs. 16 to 19, a charging connector 90 for charging the battery 18 is provided on the front control section 11A of the driver's section 10. As shown in Fig. 17, the front control section 11A has a steering operation device 91 including a steering wheel 12, and a front cover (cover body) 92 that covers the lower side of the steering operation device 91. The front cover (front control section 11A) 92 is disposed above the vehicle body 2 and is mounted on the vehicle body. That is, the front cover 92 is erected on the vehicle body 2. The front cover 92 is also provided so as to protrude upward from the floor 16. The steering wheel 12 is disposed on the upper back surface of the front cover 92. An instrument panel 54 having a monitor, various meters, various switches, etc. is provided on the upper part of the front cover 92. A battery remaining gauge that displays the charge level of the battery 18 is provided on the instrument panel 54. The front cover 92 is disposed behind the bonnet 20 and close to the bonnet 20, and is formed in an open shape toward the front. The rear end of the bonnet 20 is open toward the rear. Therefore, the front cover 92 and the bonnet 20 are in communication with each other. The rear frame portion 23 (main frame 26) of the support frame 22 is disposed on the rear end side of the bonnet 20, and the mounting plate 33 provided on the rear frame portion 23 is inserted into the front cover 92.

[0062] 17, the steering operation device 91 includes a steering operation member (operation member) 86 including the steering wheel 12 and the steering shaft 56, a steering post 57 supporting the steering shaft 56, a steering valve 58 connected to the steering shaft 56 via a universal joint 62, and a frame member 59 supporting the steering post 57, the steering valve 58, etc. Therefore, the front cover 92 covers the lower side of the steering operation member 86. The frame member 59 is attached to and supported by a member attached to the vehicle body 2 side, such as the rear frame portion 23.

[0063] In the above-mentioned steering operation device 91, when the steering handle 12 is rotated, the steering valve 58 is operated via the steering shaft 56 and the universal joint 62, and the steering valve 58 supplies hydraulic oil supplied from the hydraulic pump P1 to a steering cylinder (not shown) that steers the front wheels 3A.

[0064] As shown in Figs. 16 to 19, the charging connector 90 is disposed on the outer surface side of the front cover 92 (cover body) and is provided exposed to the outside of the front cover 92 (front steering section 11A). The charging connector 90 is disposed on the side surface side (right side surface side) of the front cover 92 so as to face outward (rightward) in the vehicle width direction. As shown in Fig. 17, the charging connector 90 is disposed forward and below the steering handle 12. As shown in Fig. 1, the charging connector 90 is disposed on the upper part of the outer surface of the front cover 92, at a position approximately the same height as the seat portion 6A of the driver's seat 6. The right side of the front cover 92 is open, and a foot can be placed on the floor 16 below the charging connector 90 when charging. A space for passage is formed between the front cover 92 and the fender 7.

[0065] As shown in FIG. 18, the charging connector 90 includes a connector body 96 having a connection terminal portion 96a, a cap 97 that opens and closes the connection terminal portion 96a side of the connector body 96, and a wiring terminal portion 96b.

[0066] The connection terminal portion 96a is a portion to which a power supply connector 64 provided in an external power source facility such as a charging facility called a charging stand or a charging station, or a charging facility installed in a house, is connected.

[0067] The connector body 96 is disposed outward (to the right) of the steering wheel 12 in the vehicle width direction and outward of the driver's seat 6 in the vehicle width direction.

[0068] As shown in Fig. 17, the cap 97 is attached to the connector body 96 so that a pivot portion 97a provided at the front portion can rotate about a vertical axis (an axis extending in the up-down direction). A locking device 98 is provided at the rear of the cap 97 to releasably engage with the cap 97 and regulate the opening movement of the cap 97. The locking device 98 is pivotally supported on the connector body 96, and can be released from the regulation of the opening movement of the cap 97 by rotating the locking device 98 about the vertical axis. By opening the cap 97 forward about the vertical axis, the connection terminal portion 96a of the connector body 96 can be exposed outward in the vehicle width direction.

[0069] 18, the wiring terminal portion 96b protrudes from the rear surface of the connector body 96 and is inserted into the front cover 92. The wiring terminal portion 96b is a portion to which a connection wire that connects the charging connector 90 and the battery 18 is connected. When the power supply connector 64 on the external power source side is connected to the connection terminal portion 96a, electricity is charged from the wiring terminal portion 96b through the connection wire to the battery 18.

[0070] As shown in Figs. 16 and 17, an indicator lamp 101 and a side mirror 100 are disposed in front of the charging connector 90. The indicator lamp 101 is, for example, a combination lamp formed by combining a plurality of lamps. Lamps constituting the combination lamp include a position lamp, a turn signal lamp, a hazard lamp, etc. The side mirror 100 is a mirror for visually recognizing the rear side of the vehicle body 2. The indicator lamp 101 and a mirror body 100a of the side mirror 100 are located in front of the charging connector 90 and outward of the charging connector 90 in the vehicle width direction.

[0071] As shown in FIG. 20, the charging connector 90 is attached to a connector bracket 93. The connector bracket 93 has a first bracket member 66 and a second bracket member 67. The first bracket member 66 has a mounting wall portion 66a that is attached by overlapping with a vertical plate portion 33a of a mounting plate (mounting portion) 33 provided on the rear frame portion 23, an extending wall portion 66b that extends outward in the vehicle width direction from a front end of the mounting wall portion 66a, a lamp mounting portion 66c that extends rearward from an extending end (an end portion on the outer side in the vehicle width direction) of the extending wall portion 66b, and a reinforcing member 69 made of a pipe material or the like that connects the mounting wall portion 66a and the lamp mounting portion 66c. The extending wall portion 66b protrudes outward in the vehicle width direction from the inside side of the front cover 92, and a mounting hole 68 is formed in the protruding portion of the extending wall portion 66b.

[0072] The second bracket member 67 has a first member 71 attached to the first bracket member 66 and a second member 72 fixed to the first member 71. The first member 71 has a first wall portion 71a formed so that a plate surface faces the vehicle width direction, and a second wall portion 71b extending outward in the vehicle width direction from a lower front end of the first wall portion 71a and attached to a portion of the extending wall portion 66b where the mounting hole 68 is formed. The second member 72 is fixed so as to protrude rearward from the first wall portion 71a of the first member 71. In this embodiment, the second member 72 extends in an inclined direction that transitions inward (leftward) in the vehicle width direction as it approaches rearward. The charging connector 90 is attached to the second member 72 from the outer side in the vehicle width direction. In other words, the second member 72 is a connector attachment portion to which the charging connector 90 is attached.

[0073] As described above, the connector bracket 93 has a connector mounting portion (second member 72) to which the charging connector 90 is attached outside the front cover 92, and a mounting wall portion 66a that is attached to a mounting portion (mounting plate 33) provided on the inside side of the front cover 92.

[0074] 20, a support member 73 of the side mirror 100 is attached to an upper portion of a first member 71 of the second bracket member 67 via a mounting fixture 74. Therefore, the upper portion of the first member 71 serves as a mirror mounting portion 75 to which the side mirror 100 is attached. In addition, a lamp stay 76 of an indicator lamp 101 is attached to the lamp mounting portion 66c of the first bracket member 66.

[0075] As described above, the connector bracket 93 has the mirror mounting portion 75 to which the side mirror 100 is attached, and the lamp mounting portion 66c to which the indicator lamp 101 is attached.

[0076] The charging connector 90 can also be disposed on the outer surface side of the cover body 14 of the side control unit 11B. In other words, the charging connector 90 is provided on a cover body provided around the driver's seat 6, which covers the lower side of the operating member.

[0077] The above electric tractor 1 comprises an electric motor 4 that drives the traveling device 3, a battery 18, an inverter 19 that supplies power from the battery 18 to the electric motor 4, a body frame 8 that is positioned in front of the driver's seat 6 and below a bonnet 20 that covers the battery 18, and a support frame 22 attached to the body frame 8, and the support frame 22 has a battery support portion 24 that supports the battery 18 that is positioned above the electric motor 4 and above the body frame 8, and an inverter support portion 25 that supports the inverter 19 that is positioned between the battery support portion 24 and the body frame 8 and in front of the electric motor 4.

[0078] According to this configuration, by providing a battery support portion 24 that supports the battery 18 arranged above the electric motor 4 and above the body frame 8, and an inverter support portion 25 that supports the inverter 19 arranged between the battery support portion 24 and the body frame 8 and in front of the electric motor 4, the electric motor 4 and the inverter 19 can be arranged in close positions and the electric motor 4 and the inverter 19 can be connected by a short path.

[0079] In addition, the battery support portion 24 has a mounting plate 38 on which the battery 18 is placed, and a mounting bracket 39 protruding downward from the mounting plate 38, and the inverter support portion 25 has a support plate 46 on which the inverter 19 is placed, which is arranged below the mounting plate 38 with a gap and is attached to the body frame 8, and a support stay 47 which protrudes upward from the support plate 46 and to which the mounting bracket 39 is attached.

[0080] According to this configuration, a space for disposing the inverter 19 below the battery 18 and in front of the electric motor 4 can be provided.

[0081] Further, the inverter support portion 25 supports the inverter 19 so that the inverter 19 is disposed so as to overlap with the electric motor 4 in the front-rear direction.

[0082] According to this configuration, the electric motor 4 and the inverter 19 can be arranged in a compact manner.

[0083] In addition, the support frame 22 has a support portion 28 arranged below the rear of the mounting plate 38 and fixed to the vehicle frame 8 to support the rear of the mounting plate 38, and the inverter support portion 25 supports the front of the mounting plate 38.

[0084] According to this configuration, the support portion 28 and the inverter support portion 25 can adequately support the battery 18.

[0085] The support portion 28 also has a support plate 35 on which the rear portion of the mounting plate 38 is placed and which is positioned above the electric motor 4, and a support leg 36 which is provided on the underside of the support plate 35 and fixed to the vehicle frame 8.

[0086] By arranging the support plate 35 above the electric motor 4, the support portion 28 and the electric motor 4 can be arranged compactly.

[0087] In addition, the electric motor 4 has a motor side connector 4A provided on the front side of the electric motor 4, and the inverter 19 has an inverter side connector 19B connected to the motor side connector 4A and arranged in front of the motor side connector 4A.

[0088] According to this configuration, the motor side connector 4A and the inverter side connector 19B can be connected via a short path.

[0089] In addition, the motor side connector 4A is provided at the front lower part of the electric motor 4, and the inverter 19 is arranged so that the inverter main body 19A, which is placed and supported on the inverter support part 25, overlaps in the front-to-rear direction behind the upper part of the electric motor 4, and the inverter side connector 19B is provided on the lower side of the inverter main body 19A and protrudes downward from the inverter support part 25.

[0090] This configuration also enables the motor side connector 4A and the inverter side connector 19B to be connected via an even shorter path.

[0091] Further, the inverter support portion 25 has a cutout portion 46a that allows the inverter side connector 19B to protrude downward from the inverter support portion 25.

[0092] According to this configuration, the inverter 19 can be well supported by the inverter support portion 25 while the inverter side connector 19B can protrude downward from the inverter support portion 25.

[0093] In addition, the body frame 8 has a first side plate 8A and a second side plate 8B arranged side by side with a gap in the vehicle width direction, and the motor side connector 4A and the inverter side connector 19B are arranged between the first side plate 8A and the second side plate 8B.

[0094] According to this configuration, the motor side connector 4A and the inverter side connector 19B can be protected.

[0095] The electric tractor 1 also includes a driving section 10 including a driver's seat 6 and a control section (front control section 11A) provided around the driver's seat 6, a body 2 on which the driving section 10 is mounted, a traveling device 3 that supports the body 2 so that it can travel, an electric motor 4 that drives the traveling device 3, a battery 18 that supplies power to the electric motor 4, and a charging connector 90 for charging the battery 18, and the control section 11A includes an operating member (steering operating member 86) and a cover body (front cover 92) that covers the lower side of the operating member 86, and the charging connector 90 is arranged on the outer surface side of the cover body 92, exposed outside the control section.

[0096] According to this configuration, the battery 18 can be easily charged.

[0097] The charging connector 90 is disposed on the side surface of the cover body 92 so as to face outward in the vehicle width direction.

[0098] This configuration also makes it possible to easily charge the battery 18.

[0099] The control unit 11A also includes a steering operation member 86 as an operating member arranged in front of the driver's seat 6, and a front cover 92 as a cover body covering the lower side of the steering operation member 86, and the charging connector 90 is arranged on the upper part of the outer surface of the front cover 92.

[0100] According to this configuration, charging connector 90 can be disposed at a position where the power supply connector on the external power supply side can be easily connected.

[0101] The steering operation member 86 includes the steering handle 12, and the charging connector 90 is disposed forward of the steering handle 12.

[0102] According to this configuration, it is possible to prevent the steering handle 12 from getting in the way when connecting the connector on the external power source side to the charging connector 90.

[0103] The charging connector 90 is disposed on the outer surface of the front cover 92 at approximately the same height as the seat portion 6A of the driver's seat 6.

[0104] This configuration also enables charging connector 90 to be disposed at a position where the power supply connector on the external power source side can be easily connected.

[0105] It also includes a connector bracket 93 to which the charging connector 90 is attached, and the connector bracket 93 has a connector mounting portion (second member 72) to which the charging connector 90 is attached outside the front cover 92, and a mounting wall portion 66a that is attached to a mounting portion (mounting plate 33) provided on the inside side of the front cover 92.

[0106] According to this configuration, the connector bracket 93 can be adequately supported, and the charging connector 90 can be easily attached.

[0107] The connector bracket 93 also has a mirror mounting portion 75 to which a side mirror 100 is attached.

[0108] According to this configuration, costs can be reduced by using the same components.

[0109] The connector bracket 93 also has a lamp mounting portion 66c to which an indicator lamp 101 is attached.

[0110] This configuration also makes it possible to reduce costs by using the same components.

[0111] Although one embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0112] 2. Body 3 Running gear 4 Electric motor 6 Driver's seat 6A seat 10 Driving section 11A Control Unit (Front Control Unit) 12 Steering handle 18 Battery 33 Mounting part (mounting plate) 66a Mounting wall 66c Lamp mounting part 72 Connector mounting portion (second member) 75 Mirror mounting part 86 Operation member (steering operation member) 90 Charging connector 92 Cover body (front cover) 93 Connector bracket 100 Side Mirror 101 Indicator lamp

Claims

1. A driving section including a driver's seat and a control section provided around the driver's seat; A vehicle body on which the driving unit is mounted; A traveling device that supports the vehicle body so that it can travel; An electric motor that drives the traveling device; a battery for supplying power to the electric motor; a charging connector for charging the battery; a floor provided in front of and below the driver's seat for an operator to place his / her feet; a bonnet disposed in front of the driver's seat and forward of the floor; Equipped with the vehicle body has a vehicle body frame located below the bonnet, the battery is disposed above the vehicle body frame and below the hood, The operation unit has an operation member including a steering handle and a cover body that covers a lower side of the operation member, the cover body is disposed behind the bonnet so as to protrude above the floor, The steering handle is disposed at an upper portion of the rear surface of the cover body, the charging connector is disposed forward of a center of the steering wheel, and the charging connector further includes a connector body having a connection terminal portion, a cap that opens and closes the connection terminal portion side of the connector body, and a wiring terminal portion; The connector body is disposed outward in a vehicle width direction from the steering handle, the cap has a pivot portion and is attached to the connector body so that the pivot portion rotates about an axis, The wiring terminal portion is connected to a connection wiring that connects the charging connector and the battery, and protrudes from a rear surface of the connector body and is disposed within the cover body.

2. 2. The electric tractor according to claim 1, wherein a side of the cover body is open so that a foot can be placed on the floor below the charging connector during charging.

3. The electric tractor according to claim 1 or 2, wherein the charging connector is disposed on an outer surface side of the cover body so as to be exposed outwardly of the control unit.

4. The driving section has, as the control section, a front control section arranged in front of the driver's seat and a side control section arranged on a side of the driver's seat, The electric tractor according to any one of claims 1 to 3, wherein the charging connector is disposed in the same direction as the side operation unit in the vehicle width direction with respect to the steering handle.

5. a pedal arranged on the floor for shifting the speed of the traveling device; The electric tractor according to any one of claims 1 to 4, wherein the charging connector is disposed above the pedal and disposed inwardly of an outermost portion of the floor in a vehicle width direction.

6. The electric tractor according to any one of claims 1 to 5, wherein the charging connector is disposed on a side surface of the cover body so as to face outward in a vehicle width direction.

7. The electric tractor according to any one of claims 1 to 6, wherein the charging connector is disposed on an upper portion of an outer surface of the cover body.

8. The electric tractor according to any one of claims 1 to 7, wherein the charging connector is disposed on the outer surface of the cover body at approximately the same height as a seat portion of the driver's seat.

9. A driving section including a driver's seat and a control section provided around the driver's seat; A vehicle body on which the driving unit is mounted; A traveling device that supports the vehicle body so that it can travel; An electric motor that drives the traveling device; a battery for supplying power to the electric motor; a charging connector for charging the battery; a connector bracket to which the charging connector is attached; a floor provided in front of and below the driver's seat for an operator to place his / her feet; a bonnet disposed in front of the driver's seat and in front of the floor; Equipped with the vehicle body has a vehicle body frame located below the bonnet, the battery is disposed above the vehicle body frame and below the hood, The operation section includes a steering operation member disposed in front of the driver's seat and a front cover that covers a lower side of the steering operation member, the front cover is disposed behind the bonnet so as to protrude above the floor, The steering operation member includes a steering handle disposed on an upper part of a rear surface of the front cover, the charging connector is disposed forward of a center of the steering wheel and includes a connector body having a connection terminal portion, a cap that opens and closes the connection terminal portion side of the connector body, and a wiring terminal portion; The connector body is disposed outward in a vehicle width direction from the steering handle, the cap has a pivot portion and is attached to the connector body so that the pivot portion rotates about an axis, The wiring terminal portion is connected to a connection wiring that connects the charging connector and the battery, and protrudes from a rear surface of the connector body and is disposed within the front cover.

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