Two-wheel drive pure electric tractor

Abstract

The utility model relates to the technical field of electric tractors, in particular to a two-wheel drive pure electric tractor which comprises a frame, front wheels are arranged on the two sides of the front portion of the frame respectively, and rear wheels are arranged on the two sides of the rear portion of the frame respectively. A gearbox is fixedly arranged on the rear portion of the frame, the output end of the gearbox is in transmission connection with the two rear wheels, a traction driving motor and a PTO driving motor are fixedly arranged on the gearbox, and the traction driving motor and the PTO driving motor are in transmission connection with the gearbox. A battery pack is fixedly arranged on the front portion of the frame, a battery control assembly is fixedly arranged on one side edge of the middle of the frame, and a hydraulic power motor is fixedly arranged on the other side edge of the middle of the frame. The transmission device has the advantages that the traction driving motor and the PTO driving motor are rigidly connected to the gearbox, no transmission shaft exists, the structure is compact, the positioning precision is high, and a transmission system is simple in structure and high in transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electric tractor technology, and in particular to a two-wheel drive pure electric tractor. Background Technology

[0002] Currently, most tractors in my country are powered by diesel engines, which result in high noise levels, complex transmission systems, and low efficiency. With social development and technological advancements, energy depletion and environmental pollution are increasingly attracting societal attention. Therefore, how to conserve energy and reduce environmental pollution has become a key issue for the sustainable development of agricultural mechanization.

[0003] Because electric tractors and traditional diesel tractors have significant differences in overall structure, their structural layouts can no longer be copied. When faced with electric tractors, a new technology, industry technicians often lack specific experience in structural layout, which can easily lead to a series of problems due to unreasonable layouts, such as failing to meet requirements for compactness and ensuring transmission efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a two-wheel drive pure electric tractor that meets the requirements of compact layout of electric tractors and ensures high transmission efficiency.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A two-wheel drive pure electric tractor includes a frame, front wheels are respectively provided on both sides of the front part of the frame, and rear wheels are respectively provided on both sides of the rear part of the frame; a gearbox is fixedly provided on the rear part of the frame, the output end of the gearbox is drivenly connected to the two rear wheels, a traction drive motor and a PTO drive motor are fixedly provided on the gearbox, and the traction drive motor and the PTO drive motor are respectively drivenly connected to the gearbox; a battery pack is fixedly provided on the front part of the frame, a battery control component is fixedly provided on one side of the middle part of the frame, and a hydraulic power motor is fixedly provided on the other side of the middle part of the frame, the battery pack is electrically connected to the battery control component, and the battery control component is electrically connected to the traction drive motor, the PTO drive motor and the hydraulic power motor respectively.

[0006] The beneficial effects of this utility model are: compared with traditional fuel tractors, it has low noise and sufficient power, and the operating cost is lower under normal load conditions. It can better match the development of new energy and meet the needs of users in major ranches across the country. The traction drive motor and PTO drive motor are rigidly connected to the gearbox, with no drive shaft, resulting in a compact structure, high positioning accuracy, simple transmission system structure, and high transmission efficiency.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, it also includes a motor controller, which is fixedly installed inside the vehicle frame. The motor controller is electrically connected to the battery control component and is communicatively connected to the traction drive motor, the PTO drive motor, and the hydraulic power motor.

[0009] The beneficial effect of adopting the above-mentioned further solution is that the motor controller can manage and control each motor separately and supply power to each motor as needed.

[0010] Furthermore, the motor controller includes a traction motor controller, a PTO motor controller, and a hydraulic motor controller. The traction motor controller, the PTO motor controller, and the hydraulic motor controller are all electrically connected to the battery control component. The traction motor controller is located inside the housing of the traction drive motor, the PTO motor controller is located inside the housing of the PTO drive motor, and the hydraulic motor controller is located inside the housing of the hydraulic power motor.

[0011] The advantages of adopting the above-mentioned further solution are: setting up traction motor controller, PTO motor controller and hydraulic motor controller separately, and setting each motor controller in the housing of the corresponding motor, realizing centralized layout, simplifying pipeline layout and routing, making the structure more compact, and avoiding pipeline bending damage.

[0012] Furthermore, it also includes a hydraulic oil tank, which is connected to the hydraulic power motor.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the hydraulic oil tank can provide hydraulic oil to the hydraulic power motor.

[0014] Furthermore, the hydraulic oil tank is located inside the gearbox.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the hydraulic oil tank is located inside the gearbox, which further improves the compactness of the structural layout.

[0016] Furthermore, the hydraulic oil tank is fixedly mounted on the outer wall of the gearbox, and the hydraulic oil tank is located on the front side of the gearbox.

[0017] The beneficial effects of adopting the above-mentioned further solution are: the hydraulic oil tank is set on the outer wall of the gearbox, realizing independent oil supply for the gearbox and the hydraulic power motor, and improving the oil replacement interval.

[0018] Furthermore, the battery control component includes a PDU and a BDU, the battery pack is electrically connected to the BDU, the BDU is electrically connected to the PDU, and the PDU is electrically connected to the traction drive motor, the PTO drive motor, and the hydraulic power motor, respectively.

[0019] The beneficial effects of adopting the above-mentioned further solutions are: the battery control components, including PDU and BDU, realize charge and discharge control, high and low voltage control, and circuit overload protection, thereby improving the safety of electricity use.

[0020] Furthermore, a control component mounting bracket is fixedly provided on one side of the middle part of the vehicle frame. Two support plates are arranged vertically on the control component mounting bracket, and the PDU and the BDU are detachably fixed on the two support plates respectively.

[0021] The advantages of adopting the above-mentioned further solutions are: it facilitates the spacing of PDU and BDU, improves the compactness of the structure, facilitates circuit connection, and ensures the heat dissipation effect of both.

[0022] Furthermore, the traction drive motor and the PTO drive motor are arranged side by side on the front side of the gearbox. A hub box is fixedly provided on the gearbox. The hub box is fixedly located below the traction drive motor or the PTO drive motor. The hub box is provided with multiple connection joints for electrical connection. The battery control component is electrically connected to the connection joints. The connection joints are electrically connected to the traction drive motor, the PTO drive motor and the hydraulic power motor respectively.

[0023] The advantages of adopting the above-mentioned further solutions are: the installation of the junction box can make the pipeline layout more compact, avoid the pipeline layout chaos caused by irregular pipeline layout, and facilitate the circuit connection between various devices.

[0024] Furthermore, the transmission is a two-speed AMT (Automated Manual Transmission).

[0025] The beneficial effect of adopting the above-mentioned further solution is that the shifting mechanism uses a meshing sleeve, and the shifting power is provided by a hydraulic power motor to achieve active shifting synchronization. Attached Figure Description

[0026] Figure 1 This is a bottom view of the present invention;

[0027] Figure 2 This is the front view of the present invention;

[0028] Figure 3 This is a schematic diagram of the installation of the battery control component in this utility model;

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Chassis; 2. Front wheel; 3. Rear wheel; 4. Gearbox; 5. Traction drive motor; 6. PTO drive motor; 7. Battery pack; 8. Battery control unit; 801. PDU; 802. BDU; 9. Hydraulic power motor; 10. Traction motor controller; 11. PTO motor controller; 12. Hydraulic motor controller; 13. Hydraulic oil tank; 14. Control component mounting bracket; 15. Support plate; 16. Junction box. Detailed Implementation

[0031] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0032] like Figures 1 to 3 As shown, this embodiment provides a two-wheel drive pure electric tractor, including a frame 1. Front wheels 2 are respectively provided on both sides of the front part of the frame 1, and rear wheels 3 are respectively provided on both sides of the rear part of the frame 1. A gearbox 4 is fixedly provided on the rear part of the frame 1. The gearbox 4 is a two-speed AMT shift gearbox. The shift mechanism adopts a meshing sleeve and the shift power is provided by a hydraulic power motor 9 to realize active shifting synchronously.

[0033] The output end of the gearbox 4 is connected to the two rear wheels 3 for transmission. The output of the gearbox 4 provides driving force for the rotation of the rear wheels 3, thereby driving the rear wheels 3 of the tractor. A traction drive motor 5 and a PTO drive motor 6 are fixedly mounted on the gearbox 4. The traction drive motor 5 and the PTO drive motor 6 are respectively connected to the gearbox 4 for transmission. Specifically, the traction drive motor 5 and the PTO drive motor 6 are detachably mounted on the gearbox 4 by bolts. A battery pack 7 is fixedly mounted on the front of the frame 1. A battery control component 8 is fixedly mounted on one side of the middle of the frame 1. A hydraulic power motor 9 is fixedly mounted on the other side of the middle of the frame 1. The battery pack 7 is electrically connected to the battery control component 8. The battery control component 8 is electrically connected to the traction drive motor 5, the PTO drive motor 6, and the hydraulic power motor 9.

[0034] This embodiment adopts a three-motor scheme: a PTO drive motor 6, a traction drive motor 5, and a hydraulic power motor 9, which realizes complete decoupling of the vehicle's driving power and the PTO output power. It adopts an AMT transmission route, and the automatic PTO speed is infinitely adjustable from 0-540 or 540-1000.

[0035] The middle part of the frame 1 is fixedly connected by a crossbeam to ensure the overall strength of the frame 1. In this embodiment, in order to ensure the reasonable arrangement of pipelines, a wire bracket is provided on the frame 1. The pipelines are fixed to the wire bracket by existing common pipeline fixing mechanisms such as wire clamps to ensure the stability of pipeline fixing.

[0036] In this embodiment, a motor controller is also included. The motor controller is fixedly installed inside the vehicle frame 1. The motor controller is electrically connected to the battery control component 8. The motor controller is communicatively connected to the traction drive motor 5, the PTO drive motor 6, and the hydraulic power motor 9. The motor controller can manage and control each motor separately and supply power to each motor as needed.

[0037] Specifically, the motor controller includes a traction motor controller 10, a PTO motor controller 11, and a hydraulic motor controller 12. The traction motor controller 10, the PTO motor controller 11, and the hydraulic motor controller 12 are all electrically connected to the battery control component 8. The traction motor controller 10 is located inside the housing of the traction drive motor 5, the PTO motor controller 11 is located inside the housing of the PTO drive motor 6, and the hydraulic motor controller 12 is located inside the housing of the hydraulic power motor 9. By setting up the traction motor controller 10, the PTO motor controller 11, and the hydraulic motor controller 12 respectively, and placing each motor controller in the housing of its corresponding motor, the arrangement is centralized, simplifying the installation and routing of pipelines, making the structure more compact, and avoiding pipeline bending damage.

[0038] It also includes a hydraulic oil tank 13, which is connected to the hydraulic power motor 9. In this embodiment, the hydraulic oil tank 13 is fixedly installed on the outer wall of the gearbox 4. The hydraulic oil tank 13 is located on the front side of the gearbox 4. The hydraulic oil tank 13 is installed on the outer wall of the gearbox 4 to realize independent oil use for the gearbox 4 and the hydraulic power motor 9, thereby improving the oil replacement interval.

[0039] In other embodiments of this utility model, the hydraulic oil tank 13 is located inside the gearbox 4, which enables centralized oil supply and further improves the compactness of the structural layout.

[0040] like Figure 3As shown, in this embodiment, the battery control component 8 includes a PDU801 (PDU801 (Power Distribution Unit) is a high-voltage power distribution unit, whose function is to be responsible for the power distribution and management of the electric vehicle's high-voltage system, providing the whole vehicle with functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short circuit protection, high-voltage sampling, and low-voltage control, protecting and monitoring the operation of the high-voltage system) and a BDU802 (BDU802 (Battery Disconnect)). Unit 7 is a circuit breaker unit for battery pack 7. The battery pack 7 is electrically connected to BDU802, and BDU802 is electrically connected to PDU801. PDU801 is electrically connected to the traction drive motor 5, the PTO drive motor 6, and the hydraulic power motor 9, respectively. Specifically, a control component mounting bracket 14 is fixedly provided on one side of the middle part of the frame 1. Two support plates 15 are arranged vertically on the control component mounting bracket 14. PDU801 and BDU802 are detachably fixed to the two support plates 15 by bolts. After PDU801 and BDU802 are installed, there is sufficient installation gap between them to facilitate the spacing of PDU801 and BDU802, improve the compactness of the structure, facilitate circuit connection, and ensure the heat dissipation effect of both.

[0041] The traction drive motor 5 and the PTO drive motor 6 are arranged side by side on the front side of the gearbox 4. A hub box 16 is fixedly installed on the gearbox 4. The hub box 16 is fixedly installed below the traction drive motor 5 or the PTO drive motor 6. The hub box 16 is provided with multiple connection joints for electrical connection. The battery control component 8 is electrically connected to the connection joints. The connection joints are electrically connected to the traction drive motor 5, the PTO drive motor 6 and the hydraulic power motor 9 respectively. The hub box 16 can make the pipeline layout more compact, avoid the pipeline layout chaos caused by irregular pipeline layout, and facilitate the circuit connection between various components.

[0042] In the embodiments of this utility model, the frame 1 is also provided with conventional components on a tractor such as a cab, steering system, and braking system. The specific installation structure and connection relationship are conventional technologies in the field and will not be described in detail here.

[0043] The battery pack 7 is sequentially connected to the BDU802 and the PDU801. The PDU801 is connected to the traction motor controller 10, the PTO motor controller 11, and the hydraulic motor controller 12 respectively, so as to realize the power supply control of the traction drive motor 5, the PTO drive motor 6, and the hydraulic power motor 9 respectively. The output end of the hydraulic power motor 9 is connected to the hydraulic mechanism to realize the hydraulic control of the hydraulic mechanism. The traction drive motor 5 and the PTO drive motor 6 are connected to the gearbox 4 for transmission. The gearbox 4 outputs the power of the traction drive motor 5 and the PTO drive motor 6 to the PTO and the rear wheel 3.

[0044] This utility model utilizes a split-type layout, taking into account factors such as high-voltage characteristics, movement space, process, and safety clearance. Specifically, when arranged with electrical components, the distance between component wiring ports is shortened, and the length and routing of pipelines are simplified. The motor and motor controller are arranged together to avoid pipeline bends. The power battery layout must meet requirements for heat dissipation, collision resistance, vehicle passability, configuration, and battery pack protection. The hardware layout of each controller in the vehicle is designed for locations with minimal vibration and good sealing, ensuring sufficient space for installation and disassembly, adequate space for connector insertion and removal, and ease of secondary installation. The transmission system design is simple and has high transmission efficiency.

[0045] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A two-wheel drive pure electric tractor, characterized in that, The vehicle includes a frame (1), with front wheels (2) on both sides of the front part of the frame (1) and rear wheels (3) on both sides of the rear part of the frame (1); a gearbox (4) is fixedly mounted on the rear part of the frame (1), the output end of the gearbox (4) is connected to the two rear wheels (3) for transmission, a traction drive motor (5) and a PTO drive motor (6) are fixedly mounted on the gearbox (4), the traction drive motor (5) and the PTO drive motor (6) are respectively connected to the gearbox (4); a battery pack (7) is fixedly mounted on the front part of the frame (1), a battery control component (8) is fixedly mounted on one side of the middle part of the frame (1), a hydraulic power motor (9) is fixedly mounted on the other side of the middle part of the frame (1), the battery pack (7) is electrically connected to the battery control component (8), and the battery control component (8) is electrically connected to the traction drive motor (5), the PTO drive motor (6) and the hydraulic power motor (9) respectively.

2. The two-wheel drive pure electric tractor according to claim 1, characterized in that, It also includes a motor controller, which is fixedly installed in the frame (1). The motor controller is electrically connected to the battery control component (8) and is communicatively connected to the traction drive motor (5), the PTO drive motor (6) and the hydraulic power motor (9).

3. A two-wheel drive pure electric tractor according to claim 2, characterized in that, The motor controller includes a traction motor controller (10), a PTO motor controller (11), and a hydraulic motor controller (12). The traction motor controller (10), the PTO motor controller (11), and the hydraulic motor controller (12) are all electrically connected to the battery control assembly (8). The traction motor controller (10) is located inside the housing of the traction drive motor (5), the PTO motor controller (11) is located inside the housing of the PTO drive motor (6), and the hydraulic motor controller (12) is located inside the housing of the hydraulic power motor (9).

4. A two-wheel drive pure electric tractor according to claim 1, characterized in that, It also includes a hydraulic oil tank (13), which is connected to the hydraulic power motor (9).

5. A two-wheel drive pure electric tractor according to claim 4, characterized in that, The hydraulic oil tank (13) is located inside the gearbox (4).

6. A two-wheel drive pure electric tractor according to claim 4, characterized in that, The hydraulic oil tank (13) is fixedly installed on the outer wall of the gearbox (4), and the hydraulic oil tank (13) is located on the front side of the gearbox (4).

7. A two-wheel drive pure electric tractor according to any one of claims 1 to 6, characterized in that, The battery control assembly (8) includes a PDU (801) and a BDU (802). The battery pack (7) is electrically connected to the BDU (802), and the BDU (802) is electrically connected to the PDU (801). The PDU (801) is electrically connected to the traction drive motor (5), the PTO drive motor (6), and the hydraulic power motor (9), respectively.

8. A two-wheel drive pure electric tractor according to claim 7, characterized in that, A control component mounting bracket (14) is fixedly provided on one side of the middle part of the vehicle frame (1). Two support plates (15) are arranged vertically on the control component mounting bracket (14). The PDU (801) and the BDU (802) are respectively detachably fixed on the two support plates (15).

9. A two-wheel drive pure electric tractor according to any one of claims 1 to 6, characterized in that, The traction drive motor (5) and the PTO drive motor (6) are arranged side by side on the front side of the gearbox (4). A hub box (16) is fixedly provided on the gearbox (4). The hub box (16) is fixedly located below the traction drive motor (5) or the PTO drive motor (6). The hub box (16) is provided with multiple connectors for electrical connection. The battery control component (8) is electrically connected to the connectors. The connectors are electrically connected to the traction drive motor (5), the PTO drive motor (6) and the hydraulic power motor (9) respectively.

10. A two-wheel drive pure electric tractor according to any one of claims 1 to 6, characterized in that, The gearbox (4) is a two-speed AMT gearbox.

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