Dump truck

Abstract

This dump truck comprises: a battery for a drive source; a first radiator disposed on one side in the vehicle width direction; and a second radiator disposed on the other side in the vehicle width direction having a gap from the first radiator. The battery is disposed in a state of not overlapping at least one of the first radiator and the second radiator when viewed from the front of the vehicle.

Description

Dump truck

[0001] The present invention relates to a dump truck. The present invention claims priority based on Japanese Patent Application No. 2024-169329 filed in Japan on September 27, 2024, and incorporates its content herein by reference.

[0002] Conventionally, a dump truck with an engine mounted on the vehicle body frame as a drive source is known. In this dump truck, a radiator is provided in front of the engine. On the other hand, there is a dump truck (battery-driven dump) with a battery mounted on the vehicle body frame as a drive source (see Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2024-036819

[0004] In a battery-driven dump, in order to secure the capacity of the battery, it is necessary to allocate a mounting space for the battery. However, since the mounting space for cooling (cooling components, etc.) of the battery-driven dump is limited, there is room for improvement in securing the mounting space for the battery.

[0005] Therefore, an object of the present invention is to provide a dump truck capable of securing a mounting space for a battery.

[0006] A dump truck according to an aspect of the present invention includes a battery as a drive source, a first radiator disposed on one side in the vehicle width direction, and a second radiator disposed on the other side in the vehicle width direction at an interval from the first radiator, and the battery is disposed so as not to overlap at least one of the first radiator and the second radiator when viewed from the front of the vehicle.

[0007] According to the above aspect, a mounting space for the battery can be secured.

[0008] Side view of the dump truck according to the embodiment. Front view of the dump truck according to the embodiment. Side view of the dump truck showing the arrangement of the battery and BTMS according to the embodiment. Block diagram of the cooling circuit to which the radiator according to the embodiment is connected. Top view of the dump truck showing the arrangement of the cooling circuit according to the embodiment. Diagram showing the flow of cooling water in the cooling circuit according to the embodiment.

[0009] Embodiments of the present invention will be described below with reference to the drawings. In these embodiments, a dump truck, which is a transport vehicle used to transport cargo while traveling through work sites such as mines, will be used as the work vehicle.

[0010] <Dump Truck> Figure 1 is a side view of a dump truck 1 according to an embodiment. Figure 2 is a front view of a dump truck 1 according to an embodiment. Figure 3 is a side view of a dump truck 1 showing the arrangement of a battery 2 and a BTMS 50 according to an embodiment. Note that in Figure 3, components on the left side of the vehicle relative to the battery 2 are omitted from the illustration. Referring together to Figures 1 to 3, the dump truck 1 comprises a vehicle frame 10 on which a battery 2 is mounted as a drive source, a dump body 12 (corresponding to a vessel) that is rotatably connected to the vehicle frame 10 by a rotating part 11 and carries cargo, and a running device 13 that supports the vehicle frame 10. For example, the dump truck 1 may be an unmanned dump truck that is driven without driver operation, or a manned dump truck that is driven based on driver operation.

[0011] Hereinafter, the forward direction (front of the vehicle), reverse direction (rear of the vehicle), and vehicle width direction (left and right direction of the vehicle) of the dump truck 1 will be referred to as "vehicle front (one side in the vehicle's front-rear direction)," "vehicle rear (the other side in the vehicle's front-rear direction)," and "vehicle width direction," respectively. The vehicle width direction may also be referred to as "left side (one side in the vehicle width direction)" or "right side (the other side in the vehicle width direction)." The right side is referred to as the right side with respect to the direction in which the dump truck 1 moves forward, and the left side is referred to as the left side with respect to the direction in which the dump truck 1 moves forward. The vertical direction, above the vehicle, and below the vehicle of the dump truck 1 may also be simply referred to as "vertical direction," "up," and "down." In the example shown in the figure, the dump truck 1 is positioned on a horizontal plane (horizontal ground). The vertical direction, above the vehicle, and below the vehicle of the dump truck 1 coincide with the vertical direction (vertical direction), vertically upward, and vertically downward, respectively, when the dump truck 1 is positioned on a horizontal plane.

[0012] The vehicle frame 10 extends in the longitudinal direction of the vehicle. The vehicle frame 10 rotatably supports the dump body 12 via a pivot portion 11. The pivot portion 11 is a part of the vehicle frame 10 that includes a shaft portion (corresponding to the pivot axis of the dump body 12) that extends in the vehicle width direction. The vehicle frame 10 is supported by the running gear 13.

[0013] The dump body 12 is rotatably connected to the vehicle frame 10 by a pivot part 11. The dump body 12 is the component on which the cargo is loaded (corresponding to the cargo bed). At least a portion of the dump body 12 is positioned above the vehicle frame 10. The dump body 12 is capable of dumping and lowering operations.

[0014] The dumping operation refers to the movement of separating the dump body 12 from the vehicle frame 10 and tilting it in the dumping direction. The dumping direction is towards the rear of the vehicle frame 10. The dumping operation includes raising the front end of the dump body 12 and tilting the dump body 12 backward. Due to the dumping operation, the loading surface of the dump body 12 tilts downward toward the rear.

[0015] The lowering motion refers to the movement of bringing the dump body 12 closer to the vehicle frame 10. The lowering motion is the opposite of the dumping motion. The lowering motion includes lowering the front end of the dump body 12.

[0016] The dump body 12 is adjusted to a dumping position and a loading position by the dumping and lowering operations. The dumping position refers to the position in which the dump body 12 is raised. The loading position refers to the position in which the dump body 12 is lowered. In the example in Figure 1, the dump body 12 in the loading position is shown by a solid line, and the dump body 12 in the dumping position is shown by a dashed line.

[0017] For example, when performing soil removal work, the dump body 12 performs a dumping operation so as to change from a loading position to a dumping position. If there is cargo loaded on the dump body 12, the cargo is discharged backward from the rear end of the dump body 12 by the dumping operation. On the other hand, when performing loading work, the dump body 12 is adjusted to a loading position.

[0018] The dump body 12 is equipped with a protector 16 that protects the driver's cab 15 from above. The protector 16 is positioned to cover the driver's cab 15 from above when the dump body 12 is in a loaded position. The protector 16 is located on the front end side of the dump body 12. The protector 16 is positioned above the driver's cab 15. The protector 16 extends in the vehicle width direction. For example, the driver's cab 15 is positioned to the left of the vehicle, relative to the center in the vehicle width direction.

[0019] The driver's cab 15 is supported by the platform 17. The platform 17 is provided to provide a foothold for the operator when getting in and out of the driver's cab 15. The platform 17 is provided to provide a foothold when servicing the equipment mounted on the dump truck 2. The platform 17 is positioned below the protector 16. The platform 17 is positioned above the wheels 21 and 22. The platform 17 extends in the vehicle width direction. The platform 17 is formed in a plate shape parallel to the vehicle's longitudinal direction and vehicle width direction.

[0020] The running gear 13 supports the vehicle frame 10. The running gear 13 moves the dump truck 2. The running gear 13 moves the dump truck 2 forward or backward. At least a portion of the running gear 13 is positioned below the vehicle frame 10. The running gear 13 comprises a plurality of wheels 21, 22. The plurality of wheels 21, 22 include front wheels 21 and rear wheels 22 positioned behind the front wheels 21.

[0021] The front wheels 21 are steering wheels that are steered to change the direction of travel of the dump truck 2. The front wheels 21 are arranged in pairs, one on the left and one on the right. The pair of front wheels 21 are spaced apart in the vehicle width direction via the front of the vehicle frame 10. There is one front wheel 21 on each side (two in total).

[0022] The rear wheels 22 are drive wheels driven by the motor 31. The rear wheels 22 are arranged in pairs, left and right. The pair of rear wheels 22 are spaced apart in the vehicle width direction via the rear of the vehicle frame 10. There are two rear wheels 22 on each side (four in total).

[0023] <Radiator> Figure 4 is a block diagram of the cooling circuits 30 and 40 to which the radiators 3 and 4 according to the embodiment are connected. Figure 5 is a top view of the dump truck 1 showing the arrangement of the cooling circuits 30 and 40 according to the embodiment. Figure 6 is a diagram showing the flow of coolant in the cooling circuits 30 and 40 according to the embodiment. Referring together to Figures 4 to 6, the dump truck 1 includes a first radiator 3 arranged on one side in the vehicle width direction, and a second radiator 4 arranged on the other side in the vehicle width direction at a distance from the first radiator 3. For example, the radiators 3 and 4 are connected to the front end side of the vehicle frame 10 via connecting members (not shown) such as brackets and bolts.

[0024] In this embodiment, the first radiator 3 is located on the left side of the vehicle. On the other hand, the second radiator 4 is located on the right side of the vehicle, spaced apart from the first radiator 3. The radiators 3 and 4 have a rectangular parallelepiped shape. One of each radiator 3 and 4 is provided. The radiators 3 and 4 are arranged with their longitudinal sides aligned along the vehicle width direction so that the main surface of the core faces forward.

[0025] The shape, number, and arrangement of radiators 3 and 4 are not limited to those described above. For example, radiators 3 and 4 may have a flattened shape. For example, there may be two or more radiators 3 and 4. For example, two or more radiators 3 and 4 may be stacked front to back. For example, radiators 3 and 4 may be arranged with their longitudinal sides aligned in a direction that intersects the vehicle width direction diagonally, such that the main surface of the core intersects the front to back direction diagonally. The shape, number, and arrangement of radiators 3 and 4 can be changed according to the design specifications.

[0026] <Cooling Circuit> The cooling circuits 30 and 40, to which radiators 3 and 4 are connected, are mounted on the vehicle frame 10. The first radiator 3 is connected to the drivetrain cooling circuit 30, which cools the drivetrain components 31 to 34. The second radiator 4 is connected to the control system cooling circuit 40, which cools the control system components 41 to 46. For example, the components of the drivetrain components 31 to 34, the control system components 41 to 46, and the cooling circuits 30 and 40 are connected on the vehicle frame 10 via connecting members (not shown) such as brackets and bolts.

[0027] In this embodiment, the drive system cooling circuit 30 is located on the left side of the vehicle. On the other hand, the control system cooling circuit 40 is located on the right side of the vehicle. However, the arrangement of the cooling circuits 30 and 40 is not limited to the above. For example, the drive system cooling circuit 30 may be located on the right side of the vehicle. For example, the control system cooling circuit 40 may be located on the left side of the vehicle. The arrangement of the cooling circuits 30 and 40 can be changed according to the design specifications.

[0028] In this embodiment, the drive system components 31 to 34 include a motor 31 that drives the rear axle (hereinafter referred to as the "driving motor 31"), a motor 32 that drives a pump that pressurizes the hydraulic fluid for steering / hoisting operations (hereinafter referred to as the "ST / HT pump motor 32"), a motor 33 that drives the brake pump (hereinafter referred to as the "brake pump motor 33"), and a motor 34 that drives the air conditioning equipment (air conditioner) (hereinafter referred to as the "air conditioning motor 34"). The configuration of the drive system components 31 to 34 is not limited to the above and can be changed according to the design specifications.

[0029] In this embodiment, control system components 41 to 46 include, for example, two converters 41 for controlling the travel motor 31, an inverter 42 for controlling the ST / HT pump motor 32, an inverter 43 for controlling the brake pump motor 33, an inverter 44 for controlling the air conditioner motor 34, two DC-DC converters 45 for converting DC voltage to another DC voltage, and two oil cooler fans 46 for cooling the oil cooler (a heat exchanger for cooling the hydraulic fluid of the vehicle). Note that the configuration of control system components 41 to 46 is not limited to the above and can be changed according to the design specifications.

[0030] The dump truck 1 includes a first fan 5 for cooling the first radiator 3, a first pump 7 for pressurizing and supplying coolant to the drive system cooling circuit 30, a second fan 6 for cooling the second radiator 4, and a second pump 8 for pressurizing and supplying coolant to the control system cooling circuit 40. In this embodiment, the drive system cooling circuit 30 and the control system cooling circuit 40 are configured such that the coolant flow paths are separate paths (independent circuits).

[0031] The first fan 5 is positioned so as to overlap with the first radiator 3 when viewed from the front of the vehicle. For example, the first fan 5 may be positioned so as to face the main surface of the core of the first radiator 3. The first pump 7 pumps coolant to the drive system cooling circuit 30 to which the first radiator 3 is connected. For example, the first pump 7 may be positioned upstream of the piping constituting the drive system cooling circuit 30 and downstream of the first radiator 3 in the direction of coolant flow. For example, a sub-tank 39 for storing coolant may be connected to the first radiator 3.

[0032] In this embodiment, the coolant pumped by the first pump 7 flows through the piping that constitutes the drive system cooling circuit 30, circulating through each drive system component 31-34 (air conditioner motor 34, brake pump motor 33, ST / HT pump motor 32, travel motor 31) and the first radiator 3. The drive system components 31-34 are cooled by the circulation of the coolant in the drive system cooling circuit 30.

[0033] The second fan 6 is positioned so as to overlap with the second radiator 4 when viewed from the front of the vehicle. For example, the second fan 6 may be positioned so as to face the main surface of the core of the second radiator 4. The second pump 8 pumps coolant to the control system cooling circuit 40 to which the second radiator 4 is connected. For example, the second pump 8 may be positioned upstream of the piping constituting the control system cooling circuit 40 and downstream of the second radiator 4 in the direction of coolant flow. For example, a sub-tank 49 for storing coolant may be connected to the second radiator 4.

[0034] In this embodiment, the cooling water pumped by the second pump 8 flows through the piping that constitutes the control system cooling circuit 40, circulating through each control system component 41-46 (DC-DC converter 45, converter 41 that controls the travel motor 31, oil cooler fan 46, each inverter 42-44) and the second radiator 4. The control system components 41-46 are cooled by the circulation of the cooling water in the control system cooling circuit 40.

[0035] The dump truck 1 includes a controller 9. For example, the controller 9 has a processing unit, which is a processor such as a CPU; a storage unit, which is a RAM, ROM, or a combination thereof; and an input / output unit. The processing unit controls the operation of the components of the dump truck 1. The storage unit stores computer programs for realizing the functions of the processing unit and information necessary for the processing of the processing unit. The input / output unit is an interface circuit between the controller 9 and other devices.

[0036] The drive system cooling circuit 30 is a circuit with a larger heat output, higher flow rate, and higher pressure compared to the control system cooling circuit 40. For example, the controller 9 may control the first fan 5 and / or the first pump 7 so that the heat dissipation in the drive system cooling circuit 30 is 1 to 55 kW, the temperature is 65 to 80°C or lower, the flow rate is 4 to 30 L / min or higher, and the pressure is 350 to 500 kPa or lower.

[0037] The control system cooling circuit 40 is a circuit with less heat, less flow rate, and lower pressure compared to the drive system cooling circuit 30. For example, the controller 9 may control the second fan 6 and / or the second pump 8 so that the heat dissipation in the control system cooling circuit 40 is 1 to 10 kW, the temperature is 60 to 75°C or lower, the flow rate is 3 to 15 L / min or more and 20 L / min or less, and the pressure is 170 to 500 kPa or lower.

[0038] <Battery> Battery 2 serves as the power source for the dump truck 1. For example, Battery 2 (corresponding to the drive battery) may include a fuel cell (FC) that generates electricity by chemically reacting hydrogen, which is a fuel gas, with oxygen, which is an oxidizing gas. For example, a fuel cell has a stack structure in which multiple unit cells are stacked. For example, a fuel cell generates electricity using oxygen contained in the outside air. The fuel cell may be supplied with oxygen-containing air by an oxidizing gas supply device (not shown).

[0039] The dump truck 1 may also be equipped with a sub-battery 20 (for example, a secondary battery such as a lithium-ion battery). For example, the sub-battery 20 stores electricity generated in the fuel cell. For example, the sub-battery 20 may function as a power source for the dump truck 1.

[0040] The battery 2 is disposed at the center in the vehicle width direction. The battery 2 has a rectangular parallelepiped shape. The battery 2 is disposed with its longitudinal direction along the vehicle front-rear direction. For example, the battery 2 is connected to the vehicle body frame 10 via connecting members (not shown) such as brackets and bolts.

[0041] The battery 2 is disposed so as to avoid at least one of the first radiator 3 and the second radiator 4 when viewed from the front of the vehicle. In the present embodiment, the battery 2 is disposed so as to avoid each of the first radiator 3 and the second radiator 4 (in other words, at a position not overlapping with each radiator 3, 4) when viewed from the front of the vehicle.

[0042] The battery 2 is disposed so as to avoid at least one of the first radiator 3 and the second radiator 4 when viewed from above the vehicle. In the present embodiment, the battery 2 is disposed so as to avoid each of the first radiator 3 and the second radiator 4 (in other words, at a position not overlapping with each radiator 3, 4) when viewed from above the vehicle.

[0043] <BTMS> The dump truck 1 includes a BTMS 50 (Battery Thermal Management System) for controlling the temperature of the battery 2. Since the battery 2 generates heat during charging and discharging and the charge-discharge efficiency varies depending on the operating temperature range, it is necessary to perform temperature adjustment.

[0044] In the present embodiment, a plurality (for example, two) of BTMSs 50 are provided for one battery 2. The two BTMSs 50 are arranged at intervals in the front-rear direction. The BTMS 50 is provided on the upper surface of the platform 17 on the right side of the vehicle. Note that the installation mode of the BTMS 50 is not limited to the above and can be changed according to the design specifications.

[0045] The BTMS 50 is disposed so as to avoid at least one of the first radiator 3 and the second radiator 4 when viewed from the front of the vehicle. In the present embodiment, the BTMS 50 is disposed so as to avoid each of the first radiator 3 and the second radiator 4 (in other words, at a position not overlapping with each radiator 3, 4) when viewed from the front of the vehicle.

[0046] At least one of the plurality of BTMSs 50 is arranged so as to avoid at least one of the first radiator and the second radiator when viewed from the front of the vehicle. In the present embodiment, each of the two BTMSs 50 is arranged so as to avoid each of the first radiator 3 and the second radiator 4 (in other words, at a position not overlapping with each radiator 3, 4) when viewed from the front of the vehicle.

[0047] <Component Arrangement> Referring to FIGS. 5 and 6 together, a circuit 3A including the first radiator 3 (hereinafter referred to as the "first radiator circuit 3A") is arranged on the left side of the vehicle. Specifically, the first radiator 3, the first fan 5, and the first pump 7, and drive system components 31 to 34 other than the traveling motor 31 (the air conditioner motor 34, the brake pump motor 33, the ST / HT pump motor 32) are arranged on the left side of the battery 2 in a top view. The traveling motor 31 is arranged behind the battery 2. Note that since the traveling motor 31 needs to be mechanically connected to the rear wheel axle, it is preferably arranged on the rear side of the vehicle in the case of rear-wheel drive.

[0048] A circuit 4A including the second radiator 4 (hereinafter referred to as the "second radiator circuit 4A") is arranged on the right side of the vehicle. Specifically, the second radiator 4, the second fan 6, and the second pump 8, and control system components 41 to 46 (the DC-DC converter 45, the converter 41 that controls the traveling motor 31, the oil cooler fan 46, and each inverter 42 to 44) are arranged on the right side of the battery 2 in a top view. The battery 2 is arranged at the center in the vehicle width direction so as to be sandwiched between the first radiator circuit 3A on the left side and the second radiator circuit 4A on the right side in a top view. Note that the sub-battery 20 may be arranged at a position overlapping each of the inverters 42 to 44 in a top view.

[0049] <Effects> As described above, the dump truck 1 of this embodiment includes a battery 2 as a power source, a first radiator 3 arranged on one side in the vehicle width direction, and a second radiator 4 arranged on the other side in the vehicle width direction at a distance from the first radiator 3. The battery 2 is located in the center in the vehicle width direction. With this configuration, compared to the case where the first radiator 3 and the second radiator 4 are located in the center in the vehicle width direction, space for mounting the battery 2 can be allocated in the center in the vehicle width direction to secure the battery 2's capacity. Therefore, space for mounting the battery 2 can be secured.

[0050] In this embodiment, the battery 2 is positioned so as to avoid at least one of the first radiator 3 and the second radiator 4 when viewed from the front of the vehicle. With this configuration, it is easier to avoid the hot air discharged from the first radiator 3 and the second radiator 4 hitting the battery 2 compared to the case where the battery 2 overlaps with the first radiator 3 and the second radiator 4 when viewed from the front of the vehicle. Therefore, the ambient temperature of the battery 2 can be kept low.

[0051] In this embodiment, the battery 2 is positioned so as to avoid at least one of the first radiator 3 and the second radiator 4 when viewed from above the vehicle. With this configuration, compared to the case where the battery 2 overlaps with the first radiator 3 and the second radiator 4 when viewed from above the vehicle, space for mounting the battery 2 can be allocated in the vertical direction of the vehicle to secure the battery 2's capacity. Therefore, the mounting space for the battery 2 can be secured more effectively.

[0052] In this embodiment, the first radiator 3 is connected to a drive system cooling circuit 30 that cools drive system components 31 to 34. The second radiator 4 is connected to a control system cooling circuit 40 that cools control system components 41 to 46. With this configuration, it is possible to easily achieve heat balance by grouping components with similar cooling requirements into the same circuit.

[0053] In this embodiment, the dump truck 1 further includes a first fan 5 for cooling the first radiator 3, a first pump 7 for pressurizing and supplying coolant to the drive system cooling circuit 30, a second fan 6 for cooling the second radiator 4, and a second pump 8 for pressurizing and supplying coolant to the control system cooling circuit 40. With this configuration, fans 5, 6 and pumps 7, 8 can be installed for each of the radiators 3, 4, creating independent cooling circuits 30, 40. For example, by independently controlling the fans 5, 6 and pumps 7, 8 for each of the circuits 30, 40, it is possible to control each circuit 30, 40 to achieve an optimal heat balance.

[0054] In this embodiment, the dump truck 1 further includes a BTMS 50 for controlling the temperature of the battery 2. With this configuration, the temperature of the battery 2 can be controlled by the BTMS 50 (dedicated to the battery 2), separate from the cooling circuits 30 and 40. Therefore, the ambient temperature of the battery 2 can be kept low.

[0055] In this embodiment, the BTMS 50 is positioned to avoid at least one of the first radiator 3 and the second radiator 4 when viewed from the front of the vehicle. With this configuration, it is easier to avoid the hot air discharged from the first radiator 3 and the second radiator 4 hitting the BTMS 50 compared to the case where the BTMS 50 overlaps with the first radiator 3 and the second radiator 4 when viewed from the front of the vehicle. Therefore, the ambient temperature of the BTMS 50 can be kept low.

[0056] In this embodiment, multiple BTMS 50 are provided. At least one of the multiple BTMS 50 is positioned to avoid at least one of the first radiator and the second radiator when viewed from the front of the vehicle. With this configuration, when there are multiple BTMS 50, it is easier to avoid the hot air discharged from the first radiator 3 and the second radiator 4 hitting the BTMS 50 compared to the case where each BTMS 50 overlaps with the first radiator 3 and the second radiator 4 when viewed from the front of the vehicle. Therefore, the ambient temperature of the BTMS 50 can be kept low.

[0057] <Modification> In the embodiments described above, the battery was described as being positioned to avoid at least one of the first radiator and the second radiator when viewed from the front of the vehicle, but it is not limited to this. For example, the battery may be positioned so as to overlap the first radiator and the second radiator when viewed from the front of the vehicle. The arrangement of the battery as viewed from the front of the vehicle can be changed according to the design specifications.

[0058] In the embodiments described above, the battery was described as being positioned to avoid at least one of the first radiator and the second radiator when viewed from above the vehicle, but it is not limited to this. For example, the battery may be positioned so as to overlap the first radiator and the second radiator when viewed from above the vehicle. The arrangement of the battery as viewed from above the vehicle can be changed according to the design specifications.

[0059] In the embodiments described above, the first radiator is connected to a drive system cooling circuit for cooling drive system components, and the second radiator is connected to a control system cooling circuit for cooling control system components. However, the invention is not limited to this example. For example, the first and second radiators may be connected to both the drive system cooling circuit and the control system cooling circuit. The connection configuration of each radiator to each cooling circuit can be changed according to the design specifications.

[0060] In the embodiments described above, the dump truck was described with an example that further includes a first fan for cooling the first radiator, a first pump for pressurizing and supplying coolant to the drive system cooling circuit, a second fan for cooling the second radiator, and a second pump for pressurizing and supplying coolant to the control system cooling circuit, but it is not limited to this. For example, a common fan may be provided for each radiator. For example, a common pump may be provided for each cooling circuit. The installation configuration of the fans for each radiator and / or the pumps for each cooling circuit can be changed according to the design specifications.

[0061] In the embodiments described above, the dump truck was described with an example that further included a BTMS for controlling the battery temperature, but it is not limited to this. For example, the battery temperature may be controlled by the above-mentioned cooling circuit (a circuit common to the control system cooling circuit and / or the drive system cooling circuit). For example, a BTMS may not be provided. The installation method of the BTMS can be changed according to the design specifications.

[0062] In the embodiments described above, the BTMS was described as being positioned to avoid at least one of the first radiator and the second radiator when viewed from the front of the vehicle, but it is not limited to this. For example, the BTMS may be positioned so as to overlap the first radiator and the second radiator when viewed from the front of the vehicle. The arrangement of the BTMS as viewed from the front of the vehicle can be changed according to the design specifications.

[0063] In the embodiments described above, a plurality of BTMS are provided, and at least one of the plurality of BTMS is positioned to avoid at least one of the first radiator and the second radiator when viewed from the front of the vehicle. However, the invention is not limited to this. For example, each of the plurality of BTMS may be positioned to overlap with the first radiator and the second radiator when viewed from the front of the vehicle. The arrangement of the plurality of BTMS as viewed from the front of the vehicle can be changed according to the design specifications.

[0064] Although embodiments of the present invention have been described above, the present invention is not limited thereto, and additions, omissions, substitutions, and other modifications to the configuration are possible without departing from the spirit of the invention, and the above embodiments can be combined as appropriate.

[0065] (Note 1) A dump truck comprising a battery as a power source, a first radiator positioned on one side in the vehicle width direction, and a second radiator positioned on the other side in the vehicle width direction at a distance from the first radiator, wherein the battery is positioned so as viewed from the front of the vehicle, it does not overlap with at least one of the first radiator and the second radiator.

[0066] (Note 2) The battery is located in the center in the vehicle width direction, as described in Note 1 for the dump truck.

[0067] (Note 3) The dump truck according to Note 1 or 2, wherein the battery is offset in the vehicle width direction relative to at least one of the first radiator and the second radiator.

[0068] (Note 4) The dump truck according to any one of Notes 1 to 3, wherein the battery is positioned so as to not overlap with at least one of the first radiator and the second radiator when viewed from above the vehicle.

[0069] (Note 5) The dump truck as described in any of Notes 1 to 4, wherein the first radiator is connected to a drive system cooling circuit for cooling drive system components, and the second radiator is connected to a control system cooling circuit for cooling control system components.

[0070] (Note 6) The dump truck as described in Note 5, further comprising: a first fan for cooling the first radiator; a first pump for pressurizing and supplying coolant to the drive system cooling circuit; a second fan for cooling the second radiator; and a second pump for pressurizing and supplying coolant to the control system cooling circuit.

[0071] (Note 7) A dump truck according to any one of Notes 1 to 6, further comprising a BTMS for controlling the temperature of the battery.

[0072] (Note 8) The dump truck as described in Note 7, wherein the BTMS is positioned so as not to overlap with at least one of the first radiator and the second radiator when viewed from the front of the vehicle.

[0073] (Note 9) The dump truck according to Note 8, wherein a plurality of BTMS are provided, and at least one of the plurality of BTMS is arranged so as to be viewed from the front of the vehicle, it does not overlap with at least one of the first radiator and the second radiator.

[0074] 1...Dump truck, 2...Battery, 3...First radiator, 4...Second radiator, 5...First fan, 6...Second fan, 7...First pump, 8...Second pump, 10...Vehicle frame, 11...Rotating parts, 12...Dump body, 30...Drive system cooling circuit, 31-34...Drive system components, 40...Control system cooling circuit, 41-46...Control system components, 50...BTMS

Claims

1. A dump truck comprising: a battery as a power source; a first radiator located on one side in the vehicle width direction; and a second radiator located on the other side in the vehicle width direction at a distance from the first radiator, wherein the battery is positioned so as viewed from the front of the vehicle, it does not overlap with at least one of the first radiator and the second radiator.

2. The dump truck according to claim 1, wherein the battery is located in the center in the vehicle width direction.

3. The dump truck according to claim 1 or 2, wherein the battery is offset in the vehicle width direction relative to at least one of the first radiator and the second radiator.

4. The dump truck according to claim 1 or 2, wherein the battery is positioned so as to not overlap with at least one of the first radiator and the second radiator when viewed from above the vehicle.

5. The dump truck according to claim 1 or 2, wherein the first radiator is connected to a drive system cooling circuit for cooling drive system components, and the second radiator is connected to a control system cooling circuit for cooling control system components.

6. The dump truck according to claim 5, further comprising: a first fan for cooling the first radiator; a first pump for pressurizing and supplying coolant to the drive system cooling circuit; a second fan for cooling the second radiator; and a second pump for pressurizing and supplying coolant to the control system cooling circuit.

7. The dump truck according to claim 1 or 2, further comprising a BTMS for controlling the temperature of the battery.

8. The dump truck according to claim 7, wherein the BTMS is positioned so as to not overlap with at least one of the first radiator and the second radiator when viewed from the front of the vehicle.

9. The dump truck according to claim 8, wherein a plurality of BTMS are provided, and at least one of the plurality of BTMS is arranged so as to be viewed from the front of the vehicle, it does not overlap with at least one of the first radiator and the second radiator.

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