Work vehicle

Abstract

To prevent air that has cooled an object to be cooled from being supplied again to the object to be cooled, when a cooling fan is provided for the object to be cooled in a work vehicle.SOLUTION: A work vehicle includes: a frame 15 that is formed in a pipe shape and is provided on a fuselage along a right and left direction, and is provided with a vent 15e on at least one of a right portion and a left portion; and a communication port 15f that opens in a middle part of the frame 15 in the right and left direction, and communicates between a cooling fan 36 and an object 32 to be cooled with an inside of the frame 15. The cooling fan 36 supplies or discharges air to / from the object 32 to be cooled through the vent 15e, an interior of the frame 15 and the communication port 15f.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a configuration for cooling an object to be cooled in a work vehicle. [Background technology]

[0002] Some work vehicles are provided with a cooling fan for an object to be cooled (such as a radiator, an oil cooler, a battery, or an inverter) as disclosed in Patent Document 1. This allows the cooling fan to supply outside air to the object to be cooled, and exhaust the air that has cooled the object from the object to be cooled. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-95634 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the air that has cooled the object is exhausted from the object, the air that has cooled the object may enter the path through which the outside air is supplied to the object and may be supplied to the object again. When this situation occurs, the cooling efficiency of the object decreases, and there is room for improvement.

[0005] The present invention aims to prevent a situation in which, when a cooling fan is provided for an object to be cooled in a work vehicle, air that has cooled the object to be cooled is supplied again to the object to be cooled. [Means for solving the problem]

[0006] The work vehicle of the present invention comprises a body having a running gear, a riding section provided on the body, an object to be cooled, a cooling fan, a frame formed in a pipe shape and provided on the body along the left-right direction with an air vent provided on at least one of the right and left sides, and a communication port opened in the middle part of the frame in the left-right direction and connecting the cooling fan and the object to be cooled with the inside of the frame, and air is supplied to or exhausted from the object to be cooled by the cooling fan through the air vent, the inside of the frame, and the communication port.

[0007] According to the present invention, when outside air enters the interior of the frame through the frame's ventilation hole by a cooling fan, passes from the interior of the frame through the frame's communication hole, is supplied to the object to be cooled, and is then exhausted from the object to be cooled, in order for the air that has cooled the object to be supplied back to the object to be cooled, the air that has cooled the object to be cooled needs to travel from the object to be cooled to the ventilation hole in the frame.

[0008] When external air is supplied to an object to be cooled by a cooling fan, passes from the object to the inside of the frame through the frame's ventilation holes, passes through the inside of the frame and is exhausted out of the frame's ventilation holes, in order for the air that has cooled the object to be supplied back to the object to be cooled, the air that has cooled the object must travel from the frame's ventilation holes to the object to be cooled.

[0009] According to the present invention, the frame is provided on the fuselage along the left-right direction, and the ventilation opening is provided on the right (left) part of the frame, so that the ventilation opening of the frame and the object to be cooled are sufficiently separated from each other.

[0010] This makes it difficult for the air that has cooled the object to move from the object to be cooled to the vent in the frame (from the vent in the frame to the object to be cooled). Even if the air that has cooled the object to be cooled does move from the object to the vent in the frame (from the vent in the frame to the object to be cooled), it takes time to move, and during that time the temperature of the air that has cooled the object to be cooled drops and becomes the same as the outside air. In this case, from among the many existing frames provided on the aircraft, a frame provided on the aircraft along the left-right direction can be selected and used.

[0011] As described above, it is possible to prevent the air that has cooled the object to be cooled from being supplied to the object to be cooled again, thereby improving the cooling efficiency of the object to be cooled. By selecting and using a frame that is provided on the aircraft along the left-right direction from among the many existing frames provided on the aircraft, a configuration can be obtained that prevents the air that has cooled the object to be cooled from being supplied back to the object to be cooled, thereby simplifying the structure.

[0012] In the present invention, the aircraft has right and left aircraft frames arranged along the fore-and-aft direction, and a plurality of horizontal frames connected along the left-right direction across the right and left aircraft frames, and it is preferable that the frame is one of the horizontal frames.

[0013] According to the present invention, the right and left fuselage frames and the multiple horizontal frames are part of the fuselage. Since the frame is one of the horizontal frames and the frame can be obtained by using a part of the fuselage, it is advantageous in terms of simplifying the structure.

[0014] In the present invention, it is preferable that the body frame has a first frame portion located below the riding section, a second frame portion extending upward from the rear of the first frame portion, and a third frame portion extending rearward from an upper portion of the second frame portion, and that the running gear is provided rearward of the second frame portion and lower than the third frame portion in a side view, and that the frame is connected to the upper portion of the second frame portion and the front portion of the third frame portion.

[0015] In some work vehicles, the vehicle frame is provided with a first frame portion, a second frame portion extending upward from the rear of the first frame portion, and a third frame portion extending rearward from an upper portion of the second frame portion. In some work vehicles, the traveling gear is disposed rearward of the second frame portion of the vehicle frame and below the third frame portion of the vehicle frame.

[0016] According to the present invention, in the above-mentioned configuration, the frame is connected to the upper part of the second frame portion and the front part of the third frame portion of the aircraft frame, and is provided at a relatively high part of the aircraft. This means that when air enters the frame's ventilation holes (when air is exhausted from the frame's ventilation holes), it is less likely to be obstructed by obstacles on the ground, etc., which is advantageous in terms of promoting heat dissipation from the object to be cooled and improving the cooling efficiency of the object to be cooled.

[0017] In the present invention, it is preferable that a seat frame is provided with upper and lower portions along the vertical direction and front and rear portions extending rearward from the upper portions of the upper and lower portions, a seat is attached to the seat frame, and in the seat frame, the lower portions of the upper and lower portions are attached to the first frame portion and the rear portions of the front and rear portions are attached to the frame.

[0018] According to the invention, when a seat frame to which a seat is attached is provided, the upper and lower portions of the seat frame are attached to a first frame portion of the aircraft frame, and the front and rear portions of the seat frame are attached to the frame. This has the advantage of simplifying the structure, since the frame is part of the aircraft body and also serves as a member supporting the seat frame to which the seat is attached.

[0019] In the present invention, it is preferable that a part of the frame extends upward, and the backrest of the seat is attached to the upwardly extending part of the frame.

[0020] According to the present invention, the frame is located at the rear of the upper part of the seat frame, so that the frame is located behind the bottom part of the seat and below the backrest part of the seat. This has the advantage of simplifying the structure, since by extending part of the frame upward, the backrest of the seat can be easily attached to the part of the frame that extends upward.

[0021] In the present invention, it is preferable that the cooling fan is provided rearward of the frame, the object to be cooled is provided rearward of the frame adjacent to the communication opening, and air enters the interior of the frame through the ventilation opening, is supplied from the interior of the frame through the communication opening to the object to be cooled, and is exhausted from the object to be cooled through the cooling fan.

[0022] According to the present invention, the cooling fan allows outside air to enter the interior of the frame through the vent in the frame, pass from the interior of the frame through the communication opening in the frame, and is supplied to the object to be cooled, and is then exhausted from the cooling fan to the rear of the seat. This makes it difficult for the air that has cooled the object to flow toward the worker in the seat, improving the comfort of the worker.

[0023] In the present invention, it is preferable that a heat dissipation fin is provided which is attached to the object to be cooled, and the heat dissipation fin is disposed in a position facing the communication port.

[0024] According to the present invention, when the heat dissipation fins for promoting heat dissipation are attached to the object to be cooled, the heat dissipation fins are arranged at a position facing the communication opening of the frame, so that when the outside air passes through the ventilation opening of the frame and the communication opening from the inside, the outside air is directly supplied to the heat dissipation fins, which is advantageous in promoting heat dissipation of the object to be cooled and improving the cooling efficiency of the object to be cooled.

[0025] In the present invention, it is preferable that the heat dissipation fins are attached to the upper part of the object to be cooled, the cooling fan is provided above the heat dissipation fins, and a guide plate is provided to guide the exhaust air of the cooling fan rearward.

[0026] According to the present invention, when the heat dissipation fins are attached to the top of the object to be cooled, the cooling fan is provided above the heat dissipation fins, so that the air near the heat dissipation fins (air that has cooled the object to be cooled) can be smoothly exhausted by the cooling fan. This is advantageous in terms of promoting heat dissipation from the object to be cooled and improving the cooling efficiency of the object to be cooled. The exhaust air from the cooling fan (air that has cooled the object to be cooled) is guided rearward by the guide plate and is less likely to flow toward the worker in the seat in front of the object to be cooled, which is advantageous in terms of improving the comfort of the worker.

[0027] In the present invention, it is preferable that a luggage rack is provided behind the seat, and the guide plate guides the exhaust air of the cooling fan to a position below the luggage rack.

[0028] According to the present invention, when the loading platform is provided behind the seats, the exhaust air of the cooling fan (the air that has cooled the object to be cooled) is guided below the loading platform by the guide plate, and the upward flow of the exhaust air of the cooling fan (the air that has cooled the object to be cooled) is suppressed by the loading platform, which is advantageous in terms of improving comfort for the worker.

[0029] In the present invention, it is preferable that the vehicle includes a battery located below the seat and in front of the object to be cooled, a motor that drives the running device using power from the battery, and a heat-shielding member located between the object to be cooled and the battery, and that an opening that communicates with the communication port is provided in the heat-shielding member.

[0030] Since the area below the seat in a work vehicle is relatively large, it is easy to provide a relatively large battery in an electric work vehicle equipped with a battery and a motor. If the battery is provided below the seat, the battery is provided in front of the object to be cooled.

[0031] According to the present invention, the heat shielding member is provided between the object to be cooled and the battery, making it difficult for heat from the battery to reach the object to be cooled, which is advantageous in terms of improving the cooling efficiency of the object to be cooled. Since the heat shielding member has an opening which communicates with the communication opening of the frame, outside air enters the interior of the frame through the ventilation opening of the frame, and from inside the frame, passes through the communication opening of the frame and the opening of the heat shielding member, and is smoothly supplied to the object to be cooled, which is advantageous in terms of improving the cooling efficiency of the object to be cooled.

[0032] In the present invention, it is preferable that the cooling fan is provided rearward of the frame, the object to be cooled is provided rearward of the frame adjacent to the communication opening, and air is supplied from the cooling fan to the object to be cooled, passes from the object to be cooled through the communication opening into the interior of the frame, and is exhausted from the air vent through the interior of the frame.

[0033] According to the present invention, the cooling fan supplies relatively low-temperature external air behind the seat to the object to be cooled, which enters the interior of the frame through the communication opening in the frame, passes through the interior of the frame, and is exhausted through the ventilation opening in the frame, which is advantageous in terms of improving the cooling efficiency of the object to be cooled.

[0034] In the present invention, it is preferable that a heat dissipation fin is provided which is attached to the object to be cooled, and the heat dissipation fin is disposed in a position facing the communication port.

[0035] According to the present invention, when the heat dissipation fins for promoting heat dissipation are attached to the object to be cooled, the heat dissipation fins are arranged at a position facing the communication opening of the frame, so that when the outside air passes through the communication opening of the frame from the cooling fan, the outside air is directly supplied to the heat dissipation fins, which is advantageous in promoting heat dissipation of the object to be cooled and improving the cooling efficiency of the object to be cooled.

[0036] In the present invention, it is preferable that the heat dissipation fins are attached to an upper portion of the object to be cooled, the cooling fan is provided above the heat dissipation fins, and a cover is provided to cover the upper portion of the cooling fan.

[0037] According to the present invention, when the heat dissipation fins are attached to the top of the object to be cooled, the cooling fan is provided above the heat dissipation fins, so that the air near the heat dissipation fins (air that has cooled the object to be cooled) is smoothly supplied by the cooling fan to the inside of the frame through the communication opening of the frame, which is advantageous in terms of promoting heat dissipation from the object to be cooled and improving the cooling efficiency of the object to be cooled. By providing a cover that covers the upper part of the cooling fan, it is difficult for dirt, water, etc. from above to get on the cooling fan, which is advantageous in terms of protecting the cooling fan.

[0038] In the present invention, it is preferable that the vehicle includes a battery located below the seat and in front of the object to be cooled, a motor that drives the running device using power from the battery, and a heat-shielding member located between the object to be cooled and the battery, and that an opening that communicates with the communication port is provided in the heat-shielding member.

[0039] Since the area below the seat in a work vehicle is relatively large, it is easy to provide a relatively large battery in an electric work vehicle equipped with a battery and a motor. If the battery is provided below the seat, the battery is provided in front of the object to be cooled.

[0040] According to the present invention, the heat shielding member is provided between the object to be cooled and the battery, making it difficult for heat from the battery to reach the object to be cooled, which is advantageous in terms of improving the cooling efficiency of the object to be cooled. Since the heat shield has an opening which communicates with the communication opening of the frame, outside air is supplied to the object to be cooled, enters the inside of the frame through the communication opening of the frame and the opening of the heat shield, passes through the inside of the frame and is easily exhausted through the air vent of the frame, which is advantageous in terms of improving the cooling efficiency of the object to be cooled. [Brief description of the drawings]

[0041] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 2 is a vertical sectional left side view of the vicinity of the inverter. [Figure 6] FIG. [Figure 7] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0042] Figures 1 to 7 show an electric multi-purpose work vehicle, which is an example of a work vehicle, and in Figures 1 to 7, F indicates the forward direction, B indicates the rearward direction, U indicates the upward direction, D indicates the downward direction, R indicates the rightward direction, and L indicates the leftward direction.

[0043] (Overall configuration of the work vehicle) As shown in Figures 1 and 2, right and left front wheels 1 (corresponding to running devices) for running are provided at the front of the body 4, and right and left rear wheels 2 (corresponding to running devices) for running are provided at the rear of the body 4.

[0044] The boarding section 5, where the operator boards, is provided in the section between the front wheel 1 and the rear wheel 2 in the machine body 4, and the boarding section 5 is surrounded by a ROPS frame 6. The boarding section 5 is provided with a driver's seat 7 (corresponding to a seat), a passenger seat 8 (corresponding to a seat), a floor 9, a steering wheel 10 for steering the front wheel 1, etc.

[0045] The bonnet 11 is provided in front of the passenger compartment 5, and the loading platform 12 is provided behind the passenger compartment 5. The loading platform 12 can be raised and lowered between a usage position shown by the solid lines in Fig. 1 and a dump position (see dotted lines in Fig. 2) in which the front part of the loading platform 12 is lifted up with the rear lower part of the loading platform 12 as a fulcrum.

[0046] (Aircraft configuration) As shown in Figures 2 and 3, in the aircraft 4, right and left aircraft frames 3 are arranged along the fore-and-aft direction, and multiple horizontal frames 13, 14, 15 along the left-right direction are connected across the right and left aircraft frames 3, and the aircraft frames 3 and the horizontal frames 13, 14, 15 form part of the aircraft 4.

[0047] The aircraft frame 3 has a first frame portion 21, a second frame portion 22, a third frame portion 23, etc. The first frame portion 21 is located below the boarding section 5 (floor 9) and is provided along the front-rear direction. The second frame portion 22 is connected to the rear of the first frame portion 21 and extends upward from the rear of the first frame portion 21. The third frame portion 23 is connected to the upper portion of the second frame portion 22 and extends rearward from the upper portion of the second frame portion 22.

[0048] The horizontal frame 13 is connected across the rear portions of the right and left first frame portions 21 and is provided along the left-right direction. The horizontal frame 14 is connected across the front portions of the right and left third frame portions 23 and is provided along the left-right direction.

[0049] The horizontal frame 15 (corresponding to a frame) is disposed along the left-right direction and is connected to the upper parts of the right and left second frame portions 22. The horizontal frame 15 is connected to the front parts of the right and left third frame portions 23, and the second frame portions 22 and the third frame portions 23 are connected via the horizontal frame 15.

[0050] (Front and rear wheel transmission structure) 1, 2 and 3, upper and lower links 16 are attached to the rear of the right and left first frame portions 21 so as to be able to swing up and down, and extend rearward. A transmission case 38 and a rear axle case 17 are connected to the upper and lower links 16, and rear wheels 2 are attached to the right and left parts of the rear axle case 17.

[0051] A lateral link (not shown) is attached between the left third frame portion 23 and the rear axle case 17. Suspension springs 18 are attached between the right and left third frame portions 23 and the rear axle case 17. As a result, the rear wheel 2 is attached to the vehicle body 4 via the link 16 and the suspension springs 18, disposed behind the second frame portion 22 and below the third frame portion 23.

[0052] The motor 19 and the continuously variable transmission 39 are attached to the upper part of the transmission case 38. The power of the motor 19 is transmitted to the rear wheels 2 via the continuously variable transmission 39, an auxiliary transmission (not shown) inside the transmission case 38, and a rear wheel differential (not shown).

[0053] The front wheels 1 are attached to the front of the vehicle body 4 via a suspension mechanism (not shown). Power branched off between an auxiliary transmission (not shown) and a rear wheel differential (not shown) is transmitted to the front wheels 1 via a transmission shaft 20 extending forward from a transmission case 38.

[0054] (Configuration of the seat frame to which the driver's seat and passenger seat are attached) As shown in Figures 1 to 4, there are provided right and left seat frames 24. The seat frame 24 is formed by bending a square pipe into an L shape (angle shape), and has upper and lower parts 24a along the vertical direction, and front and rear parts 24b extending rearward from the upper parts of the upper and lower parts 24a.

[0055] The lower portions of the upper and lower portions 24a of the seat frame 24 are connected to the first frame portion 21 with bolts, and the rear portions of the front and rear portions 24b of the seat frame 24 are connected to the horizontal frames 15 with bolts. A seat frame 25 extending in the left-right direction is connected across the front and rear portions 24b of the right and left seat frames 24. The upper and lower portions 24a of the seat frame 24 are removable from the first frame portion 21, and the front and rear portions 24b of the seat frame 24 are removable from the horizontal frames 15.

[0056] A single common seat portion 26 is provided for the driver's seat 7 and the passenger seat 8, and a backrest portion 27 is provided for the driver's seat 7 and a backrest portion 27 is provided for the passenger seat 8. The seat portion 26 is attached to the seat frames 24, 25, and the backrest portion 27 is attached to the horizontal frame 15 as described later.

[0057] (Horizontal frame configuration) As shown in Figures 3, 4, and 5, horizontal frame 15 is made up of a combination of multiple bent plate materials, and has a lower portion 15a, a front portion 15b, a rear portion 15c, and an upper portion 15d, and is formed into a triangular pipe shape when viewed in cross section.

[0058] In the aircraft frame 3, upper portions of the right and left second frame portions 22 are connected to the right and left portions of the lower portion 15a of the horizontal frame 15, and front portions of the right and left third frame portions 23 are connected to the right and left portions of the rear portion 15c of the horizontal frame 15. Rear portions of the front-rear portions 24b of the right and left seat frames 24 are connected to the right and left portions of the front portion 15b of the horizontal frame 14.

[0059] The rear side portion 15c of the horizontal frame 15 extends upward beyond the front side portion 15b of the horizontal frame 15. The upper side portion 15d of the horizontal frame 15 extends upward and is connected to the upper end portion of the rear side portion 15c of the horizontal frame 15, and extends further upward, and the upper right and left parts of the upper part of the upper side portion 15d of the horizontal frame 15 are connected to the right and left parts of the ROPS frame 6. The backrest portion 27 of the driver's seat 7 and the backrest portion 27 of the passenger seat 8 are attached to the upper side portion 15d of the horizontal frame 15.

[0060] (Correspondence to claims regarding aircraft frames) With the above-mentioned configuration, the vehicle is provided with a body 4 on which a traveling device (front wheel 1 and rear wheel 2) is provided, and a riding section 5 provided on the body 4.

[0061] The fuselage 4 has right and left fuselage frames 3 arranged along the front-rear direction, and a plurality of horizontal frames 13, 14, 15 connected along the left-right direction across the right and left fuselage frames 3. The frame (horizontal frame 15) is one of the horizontal frames 13, 14, 15.

[0062] The aircraft frame 3 has a first frame portion 21 located below the passenger section 5, a second frame portion 22 extending upward from the rear of the first frame portion 21, and a third frame portion 23 extending rearward from the upper part of the second frame portion 22. The traveling device (rear wheel 2) is provided rearward of the second frame portion 22 and below the third frame portion 23 in a side view.

[0063] The frame (horizontal frame 15) is connected to an upper portion of the second frame portion 22 and a front portion of the third frame portion 23. A part (upper part 15d) of the frame (horizontal frame 15) extends upward, and the backrest parts 27 of the seats (driver's seat 7 and passenger seat 8) are attached to the part (upper part 15d) of the frame (horizontal frame 15) that extends upward.

[0064] The vehicle is provided with a seat frame 24 having upper and lower portions 24a aligned in the vertical direction and front and rear portions 24b extending rearward from the upper portions of the upper and lower portions 24a, and seats (driver's seat 7 and passenger seat 8) attached to the seat frame 24. In the seat frame 24, the lower parts of the upper and lower parts 24a are attached to the first frame part 21, and the rear parts of the front and rear parts 24b are attached to the frame (the horizontal frame 15).

[0065] (Battery Configuration) As shown in FIGS. 1 to 4, a battery 28 is attached to the rear of the first frame portion 21 of the vehicle frame 3 and to the lateral frame 13.

[0066] The battery 28 is provided between the upper and lower portions 24a of the seat frame 24 and the second frame portion 22, and is provided between the front and rear portions 24b of the seat frame 24 and the seat frame 25 and the first frame portion 21. The right end portion of the battery 28 is located laterally outward to the right of the right seat frame 24, and the left end portion of the battery 28 is located laterally outward to the left of the left seat frame 24.

[0067] A 12V battery 34 is provided behind the right part of the battery 28 and laterally outward to the right of the right third frame portion 23. A synthetic resin cover 29 is attached to the seat frame 24, and covers the front, right and left parts of the battery 28.

[0068] (Configuration of heat shielding member) 4 to 7, the heat shield 30 is attached to the horizontal frame 14, and is provided rearward of the horizontal frame 15 and the battery 28. The heat shield 30 is formed by bending a plate material, and has a front side portion 30a, right and left side portions 30b, and an upper side portion 30c.

[0069] The front portion 30a of the heat shield 30 is formed in a large rectangular shape when viewed from the front. The upper end of the front portion 30a of the heat shield 30 is located at approximately the same height as the upper end of the rear portion 15c of the horizontal frame 15, and the lower end of the front portion 30a of the heat shield 30 is located at approximately the same height as the first frame portion 21. The right and left ends of the front portion 30a of the heat shield 30 are located near the right and left second frame portions 22.

[0070] The upper portion 30c of the heat shield 30 has the same width as the front portion 30a of the heat shield 30, and extends rearward from the upper end of the front portion 30a of the heat shield 30. A long gap is formed between the upper portion 30c of the heat shield 30 and the horizontal frame 14 in the left-right direction. The right and left lateral sides 30b of the heat shield 30 are provided across the right end (left end) of the front part 30a of the heat shield 30 and the right end (left end) of the upper part 30c.

[0071] (Inverter configuration) 4 to 7, a channel-shaped support member 31 is connected to the right part of the rear surface of the front part 30a of the heat shield 30. An inverter 32 (corresponding to an object to be cooled) is attached to the support member 31 and disposed behind the seat part 26 of the passenger seat 8. The converter 33 is attached to the left part of the rear surface of the front part 30 a of the heat shield 30 , and is disposed behind the seat portion 26 of the driver's seat 7 .

[0072] The power of the battery 28 is supplied to the inverter 32, and the DC power of the battery 28 is converted into AC power in the inverter 32 and supplied to the motor 19, causing the motor 19 to operate. AC power from an external charger (not shown) is converted to DC power in the converter 33 and supplied to the battery 28.

[0073] The power of battery 28 is supplied to a DC-DC converter (not shown) where it is reduced to 12 V. The power reduced to 12 V is supplied to battery 34, and various devices (not shown) equipped on the work vehicle are operated by the 12 V power from battery 34.

[0074] (Inverter cooling configuration) 4 to 7, the right and left ends of the horizontal frame 15 are open, and serve as right and left air vents 15e. A communication port 15f is opened in a portion behind the seat portion 26 of the passenger seat 8 in the rear side portion 15c of the horizontal frame 15. The right and left lateral sides of the cover 29 are located slightly away from the right and left lateral air vents 15e of the horizontal frame 15 on the lateral side.

[0075] An opening 30d of the same size as the communication opening 15f of the horizontal frame 15 is formed in the front portion 30a of the heat shield 30, at a portion facing the communication opening 15f of the horizontal frame 15. A heat dissipation fin 35 is attached to the upper portion of the inverter 32, and is disposed at a position facing rearward of the opening 30d of the heat shield 30 (the communication opening 15f of the horizontal frame 15).

[0076] The cooling fan 36 is attached to the support member 31. The cooling fan 36 is disposed above the heat dissipation fins 35 and below the gap between the upper portion 30c of the heat shield member 30 and the horizontal frame 14. When the cooling fan 36 is rotationally driven, the cooling fan 36 sucks in air near the heat dissipation fins 35 and exhausts the air upward from the cooling fan 36.

[0077] 3, a flat guide plate 37 (corresponding to a cover) is attached to the rear surface of the upper part of the upper part 15d of the horizontal frame 15. The guide plate 37 has approximately the same width as the horizontal frame 15, extends diagonally downward and rearward from the upper part 15d of the horizontal frame 15, and covers the upper part of the cooling fan 36.

[0078] (Correspondence to claims regarding the configuration of inverters, cooling fans, etc.) With the above configuration, the heat dissipating fins 35 are provided on the object to be cooled (the inverter 32), and the heat dissipating fins 35 are disposed at positions facing the communication openings 15f.

[0079] Heat dissipation fins 35 are attached to the top of the object to be cooled (inverter 32), a cooling fan 36 is provided above the heat dissipation fins 35, and a guide plate 37 is provided to guide the exhaust air of the cooling fan 36 rearward. A cover (guide plate 37) is provided to cover the upper part of the cooling fan 36. The vehicle is provided with a loading platform 12 provided behind the seats (driver's seat 7 and passenger seat 8), and a guide plate 37 guides the exhaust air of a cooling fan 36 below the loading platform 12.

[0080] The vehicle is equipped with a battery 28 located below the seats (driver's seat 7 and passenger seat 8) and forward of the object to be cooled (inverter 32), and a motor 19 that drives the running gear (front wheels 1 and rear wheels 2) using power from the battery 28. A heat shield 30 is provided between the object to be cooled (inverter 32) and the battery 28, and the heat shield 30 is provided with an opening 30d communicating with the communication port 15f.

[0081] (Air flow for cooling the inverter) 4 to 7, air enters the interior of the horizontal frame 15 through the right and left ventilation holes 15e of the horizontal frame 15 by the action of the cooling fan 36. In this case, since the lateral side portions of the cover 29 are positioned laterally outward of the ventilation holes 15e of the horizontal frame 15, mainly air below and behind the ventilation holes 15e of the horizontal frame 15 enters the ventilation holes 15e of the horizontal frame 15.

[0082] The air that enters the inside of the horizontal frame 15 from the ventilation opening 15e of the horizontal frame 15 passes through the inside of the horizontal frame 15 to reach the communication opening 15f of the horizontal frame 15, and then passes through the communication opening 15f of the horizontal frame 15 and the opening 30d of the heat shield 30 to reach the heat dissipation fins 35. The air that reaches the heat dissipation fins 36 removes heat from the heat dissipation fins 35, thereby cooling the inverter 32.

[0083] The air that has cooled the inverter 32 is sucked in by the cooling fan 36 and exhausted upward from the cooling fan 36 through the gap between the upper portion 30c of the heat shield 30 and the horizontal frame 14.

[0084] The air exhausted upward from the cooling fan 36 is guided diagonally downward and rearward by the guide plate 37, and is guided to the bottom of the cargo bed 12. Alternatively, the air exhausted upward from the cooling fan 36 flows to the right and left along the guide plate 37, and is exhausted to the right and left from between the ROPS frame 6 and the front part of the cargo bed 12.

[0085] (Correspondence to claims regarding inverter cooling) With the above configuration, an object to be cooled (the inverter 32) and a cooling fan 36 are provided.

[0086] The frame (horizontal frame 15) is formed in a pipe shape and is provided on the body 4 along the left-right direction, with an air vent 15e provided in at least one of the right and left parts, and a communication port 15f that opens into the middle part of the frame (horizontal frame 15) in the left-right direction and connects the cooling fan 36 and the object to be cooled (inverter 32) to the inside of the frame (horizontal frame 15).

[0087] The cooling fan 36 supplies air to the object to be cooled (the inverter 32) or exhausts air from the object to be cooled (the inverter 32) through the ventilation opening 15e, the inside of the frame (the horizontal frame 15), and the communication opening 15f.

[0088] A cooling fan 36 is provided rearward of the frame (horizontal frame 15). An object to be cooled (inverter 32) is provided adjacent to the communication opening 15f and behind the frame (horizontal frame 15). Air enters the interior of the frame (horizontal frame 15) through ventilation opening 15e, passes from the interior of the frame (horizontal frame 15) through communication opening 15f, is supplied to the object to be cooled (inverter 32), and is exhausted from the object to be cooled (inverter 32) through cooling fan 36.

[0089] (First Alternative Embodiment of the Invention) The left end of the horizontal frame 15 may be blocked, and only the right ventilation hole 15e of the horizontal frame 15 may be provided. The right end of the horizontal frame 15 may be blocked, and only the left ventilation hole 15e of the horizontal frame 15 may be provided.

[0090] (Second Alternative Embodiment of the Invention) The cooling fan 36 may be configured such that, when the cooling fan 36 is rotationally driven, air above the cooling fan 36 is sucked into the cooling fan 36 and is then supplied from the cooling fan 36 to the heat dissipation fins 35 below.

[0091] According to the above-described configuration, the air that has cooled the inverter 32 (heat dissipation fins 35) enters the interior of the horizontal frame 15 through the opening 30d of the heat shield 30 and the communication opening 15f of the horizontal frame 15, passes through the interior of the horizontal frame 15, and is exhausted through the ventilation opening 15e of the horizontal frame 15.

[0092] (Correspondence to claims regarding inverters) With the above configuration, the cooling fan 36 is provided rearward of the frame (horizontal frame 15). An object to be cooled (inverter 32) is provided adjacent to the communication opening 15f and behind the frame (horizontal frame 15). Air is supplied to the object to be cooled (inverter 32) from the cooling fan 36, passes from the object to be cooled (inverter 32) through the communication port 15f into the interior of the frame (horizontal frame 15), passes through the interior of the frame (horizontal frame 15) and is exhausted from the ventilation port 15e.

[0093] (Third Alternative Embodiment of the Invention) The guide plate 37 may be eliminated. According to this configuration, the air that has cooled the inverter 32 is exhausted upward from the cooling fan 36, passes between the upper portion 15d of the horizontal frame 15 and the front portion of the loading platform 12, and flows upward.

[0094] (Fourth Alternative Embodiment of the Invention) A rear wall portion (not shown) may be provided at the rear end portion of the support member 31 so that the inverter 32 and heat dissipation fins 35 inside the support member 31 are isolated from the area of ​​the motor 19 behind the support member 31.

[0095] (Fifth Alternative Embodiment of the Invention) In the case of an electric work vehicle, the battery 28 may be set as the object to be cooled instead of the inverter 32, or the motor 19 or a control device (not shown) may be set.

[0096] In the case of a work vehicle equipped with an engine (not shown) or a hybrid type work vehicle equipped with an engine and a motor (not shown), a radiator (not shown) or an oil cooler (not shown) may be set as the object to be cooled.

[0097] (Sixth Alternative Embodiment of the Invention) In the aircraft frame 3, the upper part of the second frame part 22 and the front part of the third frame part 23 may be directly connected, and the cross frame 15 may be connected to the connecting part between the upper part of the second frame part 22 and the front part of the third frame part 23.

[0098] (Seventh Alternative Embodiment of the Invention) Instead of the horizontal frame 15, the configuration of the horizontal frame 15, the configuration of the heat shielding member 30, the configuration of the inverter 32 and the heat dissipation fins 35, and the configuration of the cooling fan 36 may be adopted for the horizontal frame 13 or the horizontal frame 14.

[0099] (Eighth Alternative Embodiment of the Invention) A driver's seat 7 and a passenger seat 8 in the front and a seat in the rear (not shown) may be provided in the body 4 (passenger section 5) to configure a four-seater work vehicle with two rows of seats.

[0100] In the above-described configuration, it is preferable to provide the battery 28 under the rear seats, and to adopt the configuration of the horizontal frame 15, the configuration of the heat shielding member 30, the configuration of the inverter 32 and the heat dissipation fins 35, and the configuration of the cooling fan 36 for the rear seats. If the capacity of the battery 28 is insufficient when the battery 28 is provided only under the rear seats, the battery 28 may be provided also under the driver's seat 7 and the passenger seat 8.

[0101] (Ninth Alternative Embodiment of the Invention) The working vehicle may be configured as a rear two-wheel drive type in which the driving power of the motor 19 is supplied to the rear wheels 2 and not to the front wheels 1.

[0102] A crawler type traveling device (not shown) may be provided as a front traveling device instead of the front wheels 1. A crawler type traveling device (not shown) may be provided as a rear traveling device instead of the rear wheels 2. The front wheels 1 and the rear wheels 2 may be configured by one crawler type traveling device (not shown). [Industrial Applicability]

[0103] The present invention can be applied not only to electric work vehicles in which the running gear is driven by a motor, but also to work vehicles in which the running gear is driven by an engine (not shown), and hybrid work vehicles in which the running gear is driven by both an engine and a motor. [Explanation of symbols]

[0104] 1 Front wheel (running gear) 2 Rear wheels (running gear) 3 Aircraft frame 4. Aircraft 5. Boarding Section 7 Driver's seat (seat) 8 Passenger seat (seat) 12 Cargo Bed 13 Horizontal frame 14 Horizontal Frame 15 Horizontal frame (frame) 15e Ventilation hole 15f communication port 19 Motor 21 First frame part 22 Second frame part 23 Third frame part 24 Seat Frame 24a Upper and lower parts 24b Front and rear parts 27 Backrest 28 Battery 30 Heat shielding material 30d opening 32 Inverter (object to be cooled) 35 Heat dissipation fin 36 Cooling fan 37 Guide Board (Cover)

Claims

1. An aircraft having a running gear; A boarding section provided on the aircraft; An object to be cooled; A cooling fan, a frame formed in a pipe shape, provided on the aircraft body along a left-right direction, and having a vent hole provided in at least one of a right part and a left part; a communication port that is opened in a middle portion of the frame in a left-right direction and that communicates the cooling fan and the object to be cooled with an inside of the frame; A work vehicle in which air is supplied to or exhausted from the object to be cooled by the cooling fan through the vent hole, the inside of the frame, and the communication hole.

2. the aircraft body includes right and left aircraft frames provided along a front-rear direction, and a plurality of lateral frames connected along a left-right direction across the right and left aircraft frames, 2. The work vehicle according to claim 1, wherein the frame is one of the lateral frames.

3. the aircraft frame has a first frame portion located below the riding section, a second frame portion extending upward from a rear portion of the first frame portion, and a third frame portion extending rearward from an upper portion of the second frame portion, The traveling device is provided rearward of the second frame portion and below the third frame portion in a side view, 3. The work vehicle according to claim 2, wherein the frame is connected to an upper portion of the second frame portion and a front portion of the third frame portion.

4. A seat frame having upper and lower portions along a vertical direction and front and rear portions extending rearward from upper portions of the upper and lower portions; a seat attached to the seat frame; and 4. The work vehicle according to claim 3, wherein in said seat frame, lower portions of said upper and lower portions are attached to said first frame portion, and rear portions of said front and rear portions are attached to said frame.

5. A portion of the frame extends upward, 5. A work vehicle according to claim 4, wherein the seat back is attached to an upwardly extending portion of the frame.

6. The cooling fan is provided rearward of the frame, the object to be cooled is provided adjacent to the communication port and rearward of the frame, 6. A work vehicle as described in claim 4 or 5, wherein air enters the interior of the frame through the ventilation hole, passes from the interior of the frame through the communication hole, is supplied to the object to be cooled, and is exhausted from the object to be cooled through the cooling fan.

7. A heat dissipation fin is provided which is attached to the object to be cooled, 7. A work vehicle according to claim 6, wherein the heat dissipation fin is disposed in a position facing the communication opening.

8. The heat dissipation fin is attached to an upper portion of the object to be cooled, The cooling fan is provided above the heat dissipation fins, 8. The work vehicle according to claim 7, further comprising a guide plate for guiding the exhaust air of the cooling fan rearward.

9. A luggage rack is provided behind the seat, 9. The work vehicle according to claim 8, wherein the guide plate guides the exhaust air of the cooling fan to a position below the loading platform.

10. A battery is provided below the seat and in front of the object to be cooled; a motor that drives the traveling device using power from the battery; a heat shielding member provided between the object to be cooled and the battery, 5. The work vehicle according to claim 4, wherein an opening communicating with the communication port is provided in the heat insulating member.

11. The cooling fan is provided rearward of the frame, the object to be cooled is provided adjacent to the communication port and rearward of the frame, 6. A work vehicle as described in claim 4 or 5, wherein air is supplied from the cooling fan to the object to be cooled, passes from the object to be cooled through the communication opening into the frame, passes through the inside of the frame and is exhausted from the ventilation opening.

12. A heat dissipation fin is provided which is attached to the object to be cooled, The work vehicle according to claim 11, wherein the heat dissipation fin is disposed in a position facing the communication opening.

13. The heat dissipation fin is attached to an upper portion of the object to be cooled, The cooling fan is provided above the heat dissipation fins, The work vehicle according to claim 12, further comprising a cover for covering the cooling fan.

14. A battery is provided below the seat and in front of the object to be cooled; a motor that drives the traveling device using power from the battery; a heat shielding member provided between the object to be cooled and the battery, The work vehicle according to claim 11, wherein an opening communicating with the communication port is provided in the heat insulating member.

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