Four-wheel drive tractor
The four-wheel drive tractor, with its four-wheel drive structure and electric power, solves the problems of difficulty in turning around and high fuel consumption of existing tractors when working in complex terrain, and achieves efficient operation and low cost.
Patent Information
- Application Number
- CN202520560951.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-26
AI Technical Summary
Existing small wheeled tractors cannot turn on the spot, making it difficult to turn around when working in hilly, mountainous, or narrow terrain, resulting in low work efficiency. In addition, internal combustion engine drives have high fuel consumption and high costs.
It adopts a four-wheel drive structure, which drives the left front and rear wheels and the right front and rear wheels to rotate in the same or opposite directions through the first and second drive units respectively. Combined with the motor controller and angle sensor, it can achieve on-the-spot steering and uses electric power to replace the internal combustion engine. It is equipped with a generator and battery power supply.
It enables tractors to turn on the spot in complex terrain, improving work efficiency, reducing fuel consumption and operating costs, and the engine also has a power generation function, further saving energy.
Smart Images
Figure CN223864674U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to agricultural machinery technical field, concretely relates to a four-wheel drive tractor. BACKGROUND
[0002] The existing small wheeled tractor usually relies on internal combustion engine to drive, adopts front drive, rear drive or four-wheel drive mode. The existing small wheeled tractor cannot realize in-situ steering, and when the tractor is working in hilly, mountainous or narrow land, it is difficult to turn around, resulting in low working efficiency of the tractor. Meanwhile, the existing tractor relies on internal combustion engine to drive, which is high in fuel consumption and working cost. SUMMARY
[0003] The utility model discloses a four-wheel drive tractor, which can realize in-situ steering, and when the tractor is working in hilly, mountainous or narrow land, it is convenient to turn around, and the working efficiency is higher.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:
[0005] A four-wheel drive tractor comprises a frame, left and right front wheels rotatably connected to the front end of the frame, and left and right rear wheels rotatably connected to the rear end of the frame. The diameters of the left and right front wheels and the left and right rear wheels are equal. The frame is further provided with first and second driving devices. The first driving device is connected to the left front wheel and the left rear wheel through chain transmission, and can drive the left front wheel and the left rear wheel to rotate in the same direction and at the same speed. The second driving device is connected to the right front wheel and the right rear wheel through chain transmission, and can drive the right front wheel and the right rear wheel to rotate in the same direction and at the same speed.
[0006] The utility model can drive the left front wheel and the left rear wheel to rotate forward through the first driving device, and drive the right front wheel and the right rear wheel to rotate reversely through the second driving device. By controlling the rotation speed of the left front wheel, the left rear wheel, the right front wheel and the right rear wheel to be equal, the in-situ steering of the tractor can be realized. Compared with the existing small wheeled tractor, which cannot realize in-situ steering and is difficult to turn around when working in hilly, mountainous or narrow land, the utility model can realize in-situ steering and is convenient to turn around when working in hilly, mountainous or narrow land, and the working efficiency is higher.
[0007] Furthermore, the first drive unit includes a first reduction gearbox connected to the left front wheel and the left rear wheel via chain drive, a first motor connected to the first reduction gearbox, and a first motor controller electrically connected to the first motor; the second drive unit includes a second reduction gearbox connected to the right front wheel and the right rear wheel via chain drive, a second motor connected to the second reduction gearbox, and a second motor controller electrically connected to the second motor; the motor controller is used to control the rotation direction and speed of the motor, and the reduction gearbox is used to adjust the high speed of the motor to a suitable lower speed; and the tractor travels by electric power, which saves fuel consumption and reduces operating costs compared to traditional internal combustion engine drive.
[0008] Furthermore, it also includes a steering wheel, on the center stalk of which an angle sensor is mounted; the first motor controller and the second motor controller are both electrically connected to the angle sensor, and the first motor controller and the second motor controller can respectively receive signals transmitted by the angle sensor, and control the first motor and the second motor based on the signals; the first motor controller and the second motor controller receive signals transmitted by the angle sensor, and control the rotation direction and speed of the first motor and the second motor respectively according to the signals, thereby controlling the rotation direction and speed of the left front wheel, left rear wheel, right front wheel, and right rear wheel to realize the steering function; for example, when the steering wheel is turned to the left at a small angle, such as 0-45°, the left front wheel and the left rear wheel rotate in the same direction as the right front wheel and the right rear wheel, but the speed of the left front wheel and the left rear wheel is less than that of the right front wheel and the right rear wheel, thereby realizing the tractor turning to the left; when the steering wheel is turned to the left at a larger angle, such as 90°, the left front wheel and the left rear wheel rotate in the opposite direction to the right front wheel and the right rear wheel, and the speed is the same, realizing the tractor turning around on the spot.
[0009] Furthermore, the left front wheel and left rear wheel are rotatably connected to the frame via a first shaft and a second shaft, respectively. The first shaft and the second shaft are respectively equipped with a first sprocket and a second sprocket. The output shaft of the first drive device is equipped with a third sprocket and a fourth sprocket. The first sprocket and the third sprocket are connected by a first chain, and the second sprocket and the fourth sprocket are connected by a second chain. The right front wheel and right rear wheel are rotatably connected to the frame via a third shaft and a fourth shaft, respectively. The third shaft and the fourth shaft are respectively equipped with a fifth sprocket and a sixth sprocket. The output shaft of the second drive device is equipped with a seventh sprocket and an eighth sprocket. The fifth sprocket and the seventh sprocket are connected by a third chain, and the sixth sprocket and the eighth sprocket are connected by a fourth chain. The above chain drive structure is simple and reliable, ensuring that the first drive device can drive the left front wheel and the left rear wheel to rotate in the same direction and at the same speed, and that the second drive device can drive the right front wheel and the right rear wheel to rotate in the same direction and at the same speed.
[0010] Furthermore, a first protective cover and a second protective cover are fixedly connected to the frame. The first protective cover covers the outside of the first sprocket, the second sprocket, the third sprocket, the fourth sprocket, the first chain, and the second chain; the second protective cover covers the outside of the fifth sprocket, the sixth sprocket, the seventh sprocket, the eighth sprocket, the third chain, and the fourth chain. The first and second protective covers protect the sprockets and chains, preventing them from coming into contact with external objects and damaging the chain drive structure.
[0011] Furthermore, the frame is also equipped with an engine and a PTO gearbox, with the engine's output shaft connected to the PTO gearbox; the engine's output shaft is connected to the agricultural implements via the PTO gearbox.
[0012] Furthermore, the frame is also equipped with an electrically connected generator and battery, and the output shaft of the engine is connected in series with the generator; the electrical energy output by the generator is stored in the battery; the battery is electrically connected to the first drive device and the second drive device respectively to supply power to the first drive device and the second drive device respectively; with this configuration, when the engine is running, in addition to providing power to the agricultural machinery, it can also generate electricity through the series-connected generator, which is more energy-efficient.
[0013] Furthermore, the engine is a diesel engine or a gasoline engine.
[0014] Compared with the existing technology, the beneficial effects of this utility model are as follows: it can turn on the spot, making it convenient for the tractor to turn around when working in hilly, mountainous, or narrow terrain, thus improving work efficiency; the tractor travels by relying on electric power, which saves fuel consumption and reduces operating costs compared to traditional internal combustion engine drive; when the engine is running, in addition to providing power to agricultural implements, it can also generate electricity through a series-connected generator, making it more energy-efficient. Attached image description:
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 A schematic diagram of the partial structure at the left front wheel and left rear wheel;
[0017] Figure 3 A schematic diagram of the chain drive structure at the left front wheel and left rear wheel;
[0018] Figure 4 This is a schematic diagram showing the connection relationship of the various components of this utility model.
[0019] The markings in the diagram are: 01-Chassis, 1-Left front wheel, 2-Right front wheel, 3-Left rear wheel, 4-Right rear wheel, 5-First gearbox, 6-First motor, 7-First motor controller, 8-Second gearbox, 9-Second motor, 10-Second motor controller, 11-Steering wheel, 12-Angle sensor, 13-First shaft, 14-Second shaft, 15-Output shaft, 16-First sprocket, 17-Second sprocket, 18-Third sprocket, 19-Fourth sprocket, 20-First chain, 21-Second chain, 22-First protective cover, 23-Engine, 24-PTO gearbox, 25-Generator, 26-Battery. Detailed Implementation
[0020] The present invention will now be described in detail with reference to the accompanying drawings.
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0022] This embodiment provides a four-wheel drive tractor, including a frame 01. A left front wheel 1 and a right front wheel 2 are rotatably connected to the front two sides of the frame 01, and a left rear wheel 3 and a right rear wheel 4 are rotatably connected to the rear two sides of the frame 01. The left front wheel 1, right front wheel 2, left rear wheel 3, and right rear wheel 4 have the same diameter. The frame 01 is also provided with a first drive device and a second drive device. The first drive device is connected to the left front wheel 1 and the left rear wheel 3 via chain drive, and the first drive device can drive the left front wheel 1 and the left rear wheel 3 to rotate in the same direction and at the same speed. The second drive device is connected to the right front wheel 2 and the right rear wheel 4 via chain drive, and the second drive device can drive the right front wheel 2 and the right rear wheel 4 to rotate in the same direction and at the same speed.
[0023] The first drive unit includes a first gearbox 5 connected to the left front wheel 1 and the left rear wheel 3 via chain drive, a first motor 6 connected to the first gearbox 5, and a first motor controller 7 electrically connected to the first motor 6; the second drive unit includes a second gearbox 8 connected to the right front wheel 2 and the right rear wheel 4 via chain drive, a second motor 9 connected to the second gearbox 8, and a second motor controller 10 electrically connected to the second motor 9.
[0024] It also includes a steering wheel 11, on which an angle sensor 12 is mounted; the first motor controller 7 and the second motor controller 10 are both electrically connected to the angle sensor 12. The first motor controller 7 and the second motor controller 10 can respectively receive the signals transmitted by the angle sensor 12, and control the first motor 6 and the second motor 9 based on the signals.
[0025] The left front wheel 1 and the left rear wheel 3 are rotatably connected to the frame 01 via a first shaft 13 and a second shaft 14, respectively. A first sprocket 16 and a second sprocket 17 are respectively mounted on the first shaft 13 and the second shaft 14. A third sprocket 18 and a fourth sprocket 19 are mounted on the output shaft 15 of the first drive unit (in this embodiment, the output shaft 15 of the first reduction gearbox 5). The first sprocket 16 and the third sprocket 18 are connected by a first chain 20, and the second sprocket 17 and the fourth sprocket 19 are connected by a second chain 21. The right front wheel 2 and the right rear wheel 4 are connected to the second drive unit via chain drives. The connection structure is the same as the chain drive connection structure between the left front wheel 1 and the left rear wheel 3 and the first drive device, except for the difference in the numbering of the shaft, sprocket, and chain. Specifically: the right front wheel 2 and the right rear wheel 4 are rotatably connected to the frame 01 through the third shaft and the fourth shaft, respectively. The third shaft and the fourth shaft are respectively provided with the fifth sprocket and the sixth sprocket. The output shaft of the second drive device (in this embodiment, the output shaft of the second reduction gearbox 8) is provided with the seventh sprocket and the eighth sprocket. The fifth sprocket and the seventh sprocket are connected by the third chain, and the sixth sprocket and the eighth sprocket are connected by the fourth chain.
[0026] A first protective cover 22 and a second protective cover are fixedly connected to the frame 01. The first protective cover 22 covers the outside of the first sprocket 16, the second sprocket 17, the third sprocket 18, the fourth sprocket 19, the first chain 20 and the second chain 21; the second protective cover covers the outside of the fifth sprocket, the sixth sprocket, the seventh sprocket, the eighth sprocket, the third chain and the fourth chain.
[0027] The frame 01 is also equipped with an engine 23 and a PTO gearbox 24, with the output shaft of the engine 23 connected to the PTO gearbox 24;
[0028] The frame 01 is also equipped with an electric generator 25 and a battery 26 connected to each other. The output shaft of the engine 23 is connected in series with the generator 25. The electrical energy output by the generator 25 is stored in the battery 26. The battery 26 is electrically connected to the first drive device and the second drive device respectively to supply power to the first drive device and the second drive device respectively.
[0029] Engine 23 is either a diesel engine or a gasoline engine.
[0030] The present invention, employing the aforementioned technical solution, can drive the left front wheel 1 and left rear wheel 3 to rotate forward via the first drive device, while simultaneously driving the right front wheel 2 and right rear wheel 4 to rotate in reverse via the second drive device. By controlling the rotational speeds of the left front wheel 1 and left rear wheel 3 to be equal to those of the right front wheel 2 and right rear wheel 4, the tractor can achieve on-the-spot turning. Compared to existing small wheeled tractors that cannot achieve on-the-spot turning, and which face difficulties turning around in hilly, mountainous, or narrow terrain, resulting in low tractor operating efficiency, the present invention can achieve on-the-spot turning. This facilitates turning around in hilly, mountainous, or narrow terrain, leading to higher operating efficiency. Furthermore, the tractor's movement relies on electric power, saving fuel compared to traditional internal combustion engine drives, resulting in lower operating costs. When the engine is running, in addition to providing power to agricultural implements, it can also generate electricity through a series-connected generator, further enhancing energy efficiency.
[0031] 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 and improvements 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 four-wheel drive tractor, characterized in that: The vehicle includes a frame (01), with a left front wheel (1) and a right front wheel (2) rotatably connected to the front two sides of the frame (01), and a left rear wheel (3) and a right rear wheel (4) rotatably connected to the rear two sides of the frame (01); the left front wheel (1), right front wheel (2), left rear wheel (3), and right rear wheel (4) have the same diameter; the frame (01) is also provided with a first drive device and a second drive device; the first drive device is connected to the left front wheel (1) and the left rear wheel (3) respectively through chain drive, and the first drive device can drive the left front wheel (1) and the left rear wheel (3) to rotate in the same direction and at the same speed; the second drive device is connected to the right front wheel (2) and the right rear wheel (4) respectively through chain drive, and the second drive device can drive the right front wheel (2) and the right rear wheel (4) to rotate in the same direction and at the same speed.
2. The four-wheel drive tractor according to claim 1, characterized in that: The first drive unit includes a first gearbox (5) connected to the left front wheel (1) and the left rear wheel (3) via chain drive, a first motor (6) connected to the first gearbox (5), and a first motor controller (7) electrically connected to the first motor (6); the second drive unit includes a second gearbox (8) connected to the right front wheel (2) and the right rear wheel (4) via chain drive, a second motor (9) connected to the second gearbox (8), and a second motor controller (10) electrically connected to the second motor (9).
3. The four-wheel drive tractor according to claim 2, characterized in that: It also includes a steering wheel (11), on which an angle sensor (12) is installed; the first motor controller (7) and the second motor controller (10) are both electrically connected to the angle sensor (12). The first motor controller (7) and the second motor controller (10) can respectively receive the signal transmitted by the angle sensor (12) and control the first motor (6) and the second motor (9) based on the signal.
4. The four-wheel drive tractor according to any one of claims 1-3, characterized in that: The left front wheel (1) and left rear wheel (3) are rotatably connected to the frame (01) via a first shaft (13) and a second shaft (14), respectively. A first sprocket (16) and a second sprocket (17) are respectively mounted on the first shaft (13) and the second shaft (14). A third sprocket (18) and a fourth sprocket (19) are mounted on the output shaft (15) of the first drive device. The first sprocket (16) and the third sprocket (18) are connected by a first chain (20). The sprocket (17) and the fourth sprocket (19) are connected by a second chain (21); the right front wheel (2) and the right rear wheel (4) are rotatably connected to the frame (01) by a third shaft and a fourth shaft respectively. The third shaft and the fourth shaft are respectively provided with a fifth sprocket and a sixth sprocket. The output shaft of the second drive device is provided with a seventh sprocket and an eighth sprocket. The fifth sprocket and the seventh sprocket are connected by a third chain, and the sixth sprocket and the eighth sprocket are connected by a fourth chain.
5. The four-wheel drive tractor according to claim 4, characterized in that: The frame (01) is fixedly connected to a first protective cover (22) and a second protective cover. The first protective cover (22) covers the outside of the first sprocket (16), the second sprocket (17), the third sprocket (18), the fourth sprocket (19), the first chain (20), and the second chain (21). The second protective cover covers the outside of the fifth sprocket, the sixth sprocket, the seventh sprocket, the eighth sprocket, the third chain, and the fourth chain.
6. The four-wheel drive tractor according to any one of claims 1-3, characterized in that: The frame (01) is also equipped with an engine (23) and a PTO gearbox (24), the output shaft of which is connected to the PTO gearbox (24).
7. The four-wheel drive tractor according to claim 6, characterized in that: The frame (01) is also equipped with an electric generator (25) and a battery (26) connected to each other. The output shaft of the engine (23) is connected in series with the generator (25). The electrical energy output by the generator (25) is stored in the battery (26). The battery (26) is electrically connected to the first drive device and the second drive device respectively to supply power to the first drive device and the second drive device respectively.
8. The four-wheel drive tractor according to claim 6, characterized in that: The engine (23) is a diesel engine or a gasoline engine.