Four-wheel drive pure electric tractor

Abstract

The utility model relates to the field of electric tractors, in particular to a four-wheel drive pure electric tractor, which is characterized in that two traction driving motors are fixed in the middle of a frame side by side, a PTO driving motor is positioned above the two traction driving motors, and the two traction driving motors and the PTO driving motor are all connected and in transmission with a gearbox; and the hydraulic power motor is fixed on one side of the frame. The pure electric tractor has the advantages that the pure electric tractor adopts the scheme of four motors, complete decoupling of whole vehicle driving power and PTO output power is achieved, power is sufficient, and control is convenient. The two traction driving motors and the PTO driving motor are integrally arranged and rigidly connected with the gearbox, no transmission shaft exists, the structure is compact, the positioning precision is high, and the transmission system is simple in structure and high in transmission efficiency.

Description

Technical Field

[0001] The utility model relates to the field of electric tractors, in particular to a four-wheel drive pure electric tractor. Background Art

[0002] For the existing electric tractors, the spatial layout of the power system (including motors, battery packs, controllers, etc.) is unreasonable, the pipeline layout is unreasonable, the pipeline length is long, the pipeline routing is chaotic and easy to bend, the tractor structure is not compact, and the transmission efficiency is low. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is how to optimize the layout of the power system of the electric tractor.

[0004] The technical solution of the utility model to solve the above technical problem is as follows: A four-wheel drive pure electric tractor, including a frame, a hydraulic power motor, a traction drive motor, a PTO drive motor and a gearbox. There are two traction drive motors, and the two traction drive motors are fixedly arranged side by side in the middle of the frame. The PTO drive motor is located above the two traction drive motors. The two traction drive motors and the PTO drive motor are both connected to and drive the gearbox. The hydraulic power motor is fixed on one side of the frame.

[0005] The beneficial effects of the utility model are as follows: The hydraulic power motor provides power for the hydraulic mechanism on the tractor. The two traction drive motors provide the driving power for the whole vehicle. The PTO drive motor provides power for the PTO shaft. The pure electric tractor of the utility model adopts a four-motor solution to realize the complete decoupling of the driving power of the whole vehicle and the PTO output power, with sufficient power and convenient control. The two traction drive motors and the PTO drive motor are integrally arranged with the gearbox, rigidly connected, without a drive shaft, with a compact structure, high positioning accuracy, a simple transmission system structure, and high transmission efficiency. Compared with traditional fuel models, the pure electric tractor is more environmentally friendly, has lower operating costs, lower ear-piercing noise, and more abundant vehicle power.

[0006] On the basis of the above technical solution, the utility model can also be improved as follows.

[0007] Further, the gearbox is located at the rear side of the traction drive motor.

[0008] Further, it further includes a motor controller, a battery pack control component and a battery pack. The battery pack, the battery pack control component and the motor controller are sequentially communicatively connected. The motor controller is communicatively connected to the hydraulic power motor, the two traction drive motors and the PTO drive motor respectively. The battery pack control component is fixed on the other side of the frame.

[0009] The beneficial effect of adopting the above further scheme is that the battery pack is managed and controlled by the battery pack control component and the motor controller, and supplies power to the hydraulic power motor, two traction drive motors and the PTO drive motor. The battery pack control component is fixed to the other side of the frame. The battery pack control component is located on one side of the two traction drive motors and the PTO drive motor. The arrangement position is centralized, the length and direction of the pipeline are simplified, the structure is compact, and the pipeline bending damage can be avoided. The battery pack control component is arranged on the other side of the frame, the vibration is small, the sealing can be guaranteed, there is enough space for installation and disassembly, and there is enough space for connector plugging and unplugging, ensuring the convenience of secondary installation.

[0010] Furthermore, the battery pack control component includes a PDU and a BDU, and the battery pack, the BDU, the PDU and the motor controller are communicatively connected in sequence.

[0011] Furthermore, the PDU and the BDU are stacked up and down.

[0012] The beneficial effect of adopting the above further solution is that the PDU and the BDU are stacked up and down, the structure is compact, and the connection is convenient.

[0013] Furthermore, it also includes a side bracket, which is fixedly connected to the other side of the frame, and the side bracket has two partitions spaced apart from each other, the PDU is fixed on the upper partition, and the BDU is fixed on the lower partition.

[0014] The beneficial effect of adopting the above further solution is that the PDU and the BDU are installed by supporting the side brackets so that there is enough gap between them to meet the heat dissipation requirements.

[0015] Furthermore, the battery pack is fixed to the front portion of the vehicle frame, and the motor controller is located at the front side of the traction drive motor.

[0016] The beneficial effects of adopting the above further solution are: the layout of the battery pack can meet the requirements of heat dissipation, collision, vehicle passability, configuration, battery pack protection, etc. The motor controller, battery pack control components and each motor are centrally arranged, which simplifies the length and direction of the pipeline, has a compact structure, and avoids pipeline bending and damage.

[0017] Furthermore, it also includes a rear axle, and the gearbox is drivingly connected to the rear axle.

[0018] The beneficial effect of adopting the above further solution is that the gearbox outputs power to the rear axle, driving the rear wheels to rotate.

[0019] Furthermore, it also includes a universal shaft and a front axle, and the rear axle is drivingly connected to the front axle via the universal shaft.

[0020] The beneficial effects of adopting the above further solution are as follows: The rear axle outputs power to the front axle through a universal shaft, driving the front wheels to rotate.

[0021] Furthermore, the gearbox is a two-speed AMT shift gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view of a four-wheel drive pure electric tractor of the present invention;

[0023] Figure 2 is the bottom view of a four-wheel drive pure electric tractor of the present invention;

[0024] Figure 3 is the schematic diagram of a four-wheel drive pure electric tractor of the present invention. In the figure, the thin lines represent communication connection relationships, and the thick lines represent transmission connection relationships.

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] 1. Hydraulic power motor; 2. Traction drive motor; 3. PTO drive motor; 4. Gearbox; 5. Battery pack control component; 6. Battery pack; 7. Rear axle; 8. Front axle; 9. Motor controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0028] As Figures 1-3 shown, this embodiment provides a four-wheel drive pure electric tractor, including a frame, a hydraulic power motor 1, a traction drive motor 2, a PTO drive motor 3, and a gearbox 4. There are two traction drive motors 2, and the two traction drive motors 2 are fixedly arranged side by side in the middle of the frame. The PTO drive motor 3 is located above the two traction drive motors 2. The two traction drive motors 2 and the PTO drive motor 3 are both connected to and drive the gearbox 4. The hydraulic power motor 1 is fixedly arranged on one side of the frame.

[0029] In this embodiment, the hydraulic power motor 1 provides power for the hydraulic mechanism on the tractor, two traction drive motors 2 provide the driving power for the whole vehicle, and the PTO drive motor 3 provides power for the PTO shaft. The pure electric tractor adopts a four-motor solution to achieve complete decoupling of the driving power of the whole vehicle and the PTO output power, with sufficient power and easy control. The two traction drive motors 2 and the PTO drive motor 3 are integrally arranged with the gearbox 4, rigidly connected, without a transmission shaft, with a compact structure, high positioning accuracy, a simple transmission system structure, and high transmission efficiency. Compared with traditional fuel models, the pure electric tractor is more environmentally friendly, has lower operating costs, lower ear-side noise, and more abundant power for the whole vehicle.

[0030] Specifically, the housings of the two traction drive motors 2 and one PTO drive motor 3 are fixed to the housing of the gearbox 4 by bolts or other connecting parts. The hydraulic power motor 1 is used for driving connection with the hydraulic mechanism, the two traction drive motors 2 are in driving connection with the power input shaft of the gearbox 4, and the PTO drive motor 3 is in driving connection with the PTO power input shaft of the gearbox 4. For the gearbox 4, the two traction drive motors 2 serve as the power input of one transmission route, and through the power output shaft in the gearbox 4, the power is output to the rear axle 7; the PTO drive motor 3 serves as the PTO power input of the other transmission route, and the PTO power is output through the PTO power output shaft. The two transmission routes do not affect each other.

[0031] As Figure 2 shown, in one specific example, the hydraulic power motor 1 is fixed to the left side of the vehicle frame. Alternatively, the hydraulic power motor 1 is fixed to the right side of the vehicle frame.

[0032] Based on any of the above solutions, the gearbox 4 is located at the rear side of the traction drive motor 2.

[0033] Based on any of the above solutions, it further includes a motor controller 9, a battery pack control component 5, and a battery pack 6. The battery pack 6, the battery pack control component 5, and the motor controller 9 are communicatively connected in sequence. The motor controller 9 is communicatively connected to the hydraulic power motor 1, the two traction drive motors 2, and the PTO drive motor 3 respectively. The battery pack control component 5 is fixed to the other side of the vehicle frame.

[0034] The battery pack 6 is managed and controlled through the battery pack control component 5 and the motor controller 9, and supplies power to the hydraulic power motor 1, the two traction drive motors 2, and the PTO drive motor 3. The battery pack control component 5 is fixed on the other side of the vehicle frame. The battery pack control component 5 is located on one side of the two traction drive motors 2 and the PTO drive motor 3. The layout position is centralized, the pipeline length and routing are simplified, the structure is compact, and pipeline bending and damage can be avoided. The battery pack control component 5 is arranged on the other side of the vehicle frame, with less vibration and guaranteed sealing performance. There is sufficient installation and disassembly space, and sufficient space for connector plugging and unplugging to ensure the convenience of secondary installation.

[0035] Based on any of the above solutions, the battery pack control component 5 includes a PDU and a BDU, and the battery pack 6, the BDU, the PDU, and the motor controller 9 are sequentially communicatively connected.

[0036] Specifically, the PDU (Power Distribution Unit) is a high-voltage power distribution unit, and its function is to be responsible for power distribution and management in the high-voltage system of the tram, providing functions such as charge and discharge control for the whole vehicle, power-on control of high-voltage components, circuit overload and short-circuit protection, high-voltage sampling, and low-voltage control, to protect and monitor the operation of the high-voltage system. The BDU (Battery Disconnect Unit) is a battery pack disconnection unit. According to the position of the BDU in the battery pack, it can be divided into in-battery-box installation type and out-of-battery-box installation type.

[0037] Based on any of the above solutions, the PDU and the BDU are arranged in a stacked manner up and down.

[0038] The PDU and the BDU are stacked up and down, with a compact structure and convenient connection.

[0039] Optionally, the up-and-down positions of the PDU and the BDU can be interchanged.

[0040] Based on any of the above solutions, it further includes side brackets. The side brackets are fixedly connected to the other side of the vehicle frame. The side brackets have two partitions arranged at intervals up and down. The PDU is fixed on the upper partition, and the BDU is fixed on the lower partition.

[0041] The PDU and the BDU are supported and installed through the side brackets, so that there is sufficient clearance between the two to meet the heat dissipation requirements.

[0042] Based on any of the above solutions, the battery pack 6 is fixed to the front of the vehicle frame, and the motor controller 9 is located on the front side of the traction drive motor 2.

[0043] The arrangement position of the battery pack 6 can meet the requirements of heat dissipation, collision, vehicle passability, configuration, battery pack protection, etc. The motor controller 9, the battery pack control assembly 5 and each motor are arranged in a centralized manner, which simplifies the length and direction of the pipeline, has a compact structure, and avoids pipeline bending and damage.

[0044] On the basis of any of the above solutions, a rear axle 7 is further included, and the gearbox 4 is drivingly connected to the rear axle 7 .

[0045] The gearbox 4 outputs power to the rear axle 7, driving the rear wheels to rotate.

[0046] On the basis of any of the above solutions, it further includes a cardan shaft and a front axle 8, and the rear axle 7 is drivingly connected to the front axle 8 via the cardan shaft.

[0047] The rear axle 7 outputs power to the front axle 8 through the cardan shaft, driving the front wheels to rotate.

[0048] Based on any of the above solutions, the gearbox 4 is a two-speed AMT shift gearbox.

[0049] Alternatively, the gearbox 4 may also be a gearbox with other transmission routes.

[0050] In one specific example, a pure electric four-wheel drive tractor has a rated power of 200 horsepower. The battery pack 6 uses a high-energy power battery pack and adopts a four-motor solution, including a PTO drive motor 3, two traction drive motors 2 and a hydraulic power motor 1, to achieve complete decoupling of the vehicle's drive power and PTO output power. It adopts an AMT transmission route and automatic PTO: the speed is steplessly adjustable from 540 to 1000, and 4 sets of hydraulic outputs are set.

[0051] One PTO drive motor 3 and two traction drive motors 2 are integrated with the gearbox, rigidly connected, without a transmission shaft, compact in structure, and with high positioning accuracy; the motor controller 9, the battery pack control assembly 5, and the battery pack 6 are split and centrally arranged to reduce the length of the high-voltage wire and have a compact structure. The transmission system is a two-speed AMT shift gearbox. When the shift mechanism is a meshing sleeve, the hydraulic pressure provides power for the shift mechanism to push the meshing sleeve to move, and the hydraulic power motor 1 performs active shift synchronization. The front and rear axles transmit power through a universal drive shaft.

[0052] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0053] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0054] In the description of this specification, the descriptions with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0055] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A four-wheel drive pure electric tractor, characterized in that, It includes a vehicle frame, a hydraulic power motor (1), traction drive motors (2), a PTO drive motor (3) and a gearbox (4). There are two traction drive motors (2), and the two traction drive motors (2) are fixedly arranged side by side in the middle of the vehicle frame. The PTO drive motor (3) is located above the two traction drive motors (2). The two traction drive motors (2) and the PTO drive motor (3) are both connected to and drive the gearbox (4). The hydraulic power motor (1) is fixed on one side of the vehicle frame.

2. The four-wheel drive pure electric tractor according to claim 1, characterized in that, The gearbox (4) is located at the rear side of the traction drive motors (2).

3. The four-wheel drive pure electric tractor according to claim 1, wherein, It further includes a motor controller (9), a battery pack control component (5) and a battery pack (6). The battery pack (6), the battery pack control component (5) and the motor controller (9) are communicatively connected in sequence. The motor controller (9) is communicatively connected to the hydraulic power motor (1), the two traction drive motors (2) and the PTO drive motor (3) respectively. The battery pack control component (5) is fixed on the other side of the vehicle frame.

4. The four-wheel drive pure electric tractor according to claim 3, characterized in that, The battery pack control component (5) includes a PDU and a BDU. The battery pack (6), the BDU, the PDU and the motor controller (9) are communicatively connected in sequence.

5. A four-wheel drive pure electric tractor according to claim 4, characterized in that, The PDU and the BDU are arranged in an up-and-down stacked manner.

6. The four-wheel drive pure electric tractor according to claim 5, characterized in that, It further includes a side bracket. The side bracket is fixedly connected to the other side of the vehicle frame. The side bracket has two partitions arranged at an interval up and down. The PDU is fixed on the upper partition, and the BDU is fixed on the lower partition.

7. A four-wheel drive pure electric tractor according to claim 3, characterized in that, The battery pack (6) is fixed at the front part of the vehicle frame. The motor controller (9) is located at the front side of the traction drive motors (2).

8. A four-wheel drive pure electric tractor according to any one of claims 1-7, characterized in that, It further includes a rear axle (7). The gearbox (4) is drivingly connected to the rear axle (7).

9. A four-wheel drive pure electric tractor according to claim 8, characterized in that It further includes a universal shaft and a front axle (8). The rear axle (7) is drivingly connected to the front axle (8) through the universal shaft.

10. A four-wheel drive pure electric tractor according to any one of claims 1-7, characterized in that The gearbox (4) is a two-speed AMT shift gearbox.

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