A hybrid power tractor power system and tractor

Abstract

This invention discloses a hybrid power system for a tractor and a tractor. The system includes: an engine, a first generator, a second generator, a first drive motor, a second drive motor, an AMT (Automated Manual Transmission) device, a power output device, a rear axle, and a rear wheel set. The engine, the first generator, and the second generator are sequentially connected in transmission. The second generator is connected in transmission to the first input shaft of the AMT device, and the first output shaft of the AMT device is connected in transmission to the power output device. The first drive motor and the second drive motor are respectively connected in transmission to the second and third input shafts of the AMT device. The second output shaft of the AMT device is connected in transmission to the rear wheel set via the rear axle. This invention uses dual drive motors to provide power to the entire machine and dual generators to provide electrical energy, which can simultaneously meet the requirements of high horsepower and long range of the tractor. The dual-motor system reduces the design and manufacturing difficulty of the motors. Furthermore, the transmission system of this invention has high integration, a compact structure, and is easy to arrange in the overall machine layout.

Description

Technical Field

[0001] This invention relates to the field of tractor technology, and more particularly to a hybrid power system for a tractor and a tractor. Background Technology

[0002] High-horsepower traditional fuel-powered tractors are inefficient, energy-intensive, and cause serious environmental pollution. Therefore, high-horsepower tractors using traditional fuel engines as their power source can no longer meet increasingly stringent environmental and market requirements. While high-horsepower pure electric tractors offer advantages such as zero emissions and simple transmission, they are limited by battery range and charging efficiency, failing to meet the demands of extended operation. Hybrid tractors, on the other hand, allow their engines to operate consistently in their high-efficiency range, effectively reducing emissions and pollution. Furthermore, the engine drives a generator to provide electricity, eliminating concerns about tractor range. Simultaneously, the drive motor eliminates the need for a complex gearbox, simplifying the transmission system. Therefore, hybrid high-horsepower tractors possess significant technological advantages.

[0003] Currently, most hybrid tractor research uses a single motor as the power source, which is more suitable for small and medium-power tractors. Due to limitations in motor technology and overall machine layout space, the single-drive motor hybrid systems currently under research are not suitable for high-horsepower tractors. A single motor would be difficult to design and manufacture, resulting in large size and weight, and challenging placement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hybrid power system for a tractor and a tractor, addressing the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides a hybrid power system for a tractor, comprising: an engine, a first generator, a second generator, a first drive motor, a second drive motor, an AMT device, a power output device, a rear axle, a rear wheel set, a high-voltage power distribution device, and a power battery;

[0006] The engine, the first generator, and the second generator are sequentially connected by transmission. The second generator is connected to the first input shaft of the AMT device, and the first output shaft of the AMT device is connected to the power output device. The first input shaft is connected to the first output shaft. The first drive motor is connected to the second input shaft of the AMT device, and the second drive motor is connected to the third input shaft of the AMT device. The second output shaft of the AMT device is connected to the rear axle, and the rear axle is connected to the rear wheel assembly. Both the second and third input shafts are connected to the second output shaft. The first, second, and third input shafts, as well as the first and second output shafts, are arranged parallel to each other. The first generator, the second generator, the first drive motor, and the second drive motor are all electrically connected to the high-voltage power distribution device, which is electrically connected to the power battery.

[0007] The beneficial effects of this invention are as follows: The AMT device has three input ports and two output ports. The first input shaft of the AMT device is driven by the first output shaft, realizing the output of engine driving power; the second and third input shafts are driven by the second output shaft, realizing the power coupling of the dual-motor driven driving system; this invention uses dual drive motors to provide the power of the whole machine and dual generators to provide electrical energy, which can simultaneously meet the needs of tractors for high horsepower and long range; compared with the single-motor high-horsepower hybrid system, the dual-motor system reduces the design and manufacturing difficulty of the motors; moreover, this invention has a compact structure, which is convenient for the overall layout; it is economical, environmentally friendly, energy-saving and efficient.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, a first driving gear is fixed on the first input shaft, and a first driven gear is fixed on the first output shaft, with the first driving gear meshing with the first driven gear.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by meshing the first driving gear set on the first input shaft with the first driven gear set on the first output shaft, the transmission connection between the first input shaft and the first output shaft is realized, and the engine speed is transmitted to the power output device through the gear set composed of the first driving gear and the first driven gear, thus realizing the speed change function of power output.

[0011] Furthermore, a second drive gear is fixed on the second input shaft, and a third drive gear is fixed on the third input shaft. Both the second and third drive gears mesh with the power coupling transmission device; the power coupling transmission device is connected to the second output shaft for transmission.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by connecting the second input shaft, the third input shaft, and the second output shaft through the power coupling speed change device, the power coupling and speed adjustment of the dual drive motors are realized. Moreover, the integration is high, the structure is compact, and it is convenient for the overall layout of the machine.

[0013] Furthermore, the power coupling transmission device includes a first intermediate shaft and a second intermediate shaft arranged parallel to the second input shaft; a second driven gear, a first low-gear transmission gear, and a first high-gear transmission gear are fixed on the first intermediate shaft, and the second driven gear meshes with the second driving gear; a low-gear idler gear and a high-gear idler gear are fixed on the second output shaft, and the low-gear idler gear and the high-gear idler gear are connected by a synchronizer; the first low-gear transmission gear meshes with the low-gear idler gear, and the first high-gear transmission gear meshes with the high-gear idler gear; a third driven gear, a second low-gear transmission gear, and a second high-gear transmission gear are fixed on the second intermediate shaft; the third driven gear meshes with the third driving gear, the second low-gear transmission gear meshes with the low-gear idler gear, and the second high-gear transmission gear meshes with the high-gear idler gear.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the second input shaft drives the first intermediate shaft to rotate through the second driving gear and the second driven gear. The rotation of the first intermediate shaft drives the first low-gear transmission gear and the first high-gear transmission gear on the shaft. The first low-gear transmission gear drives the low-gear idle gear to rotate, and the first high-gear transmission gear drives the high-gear idle gear to rotate. If the synchronizer shift fork is moved to the low-gear idle gear side, the low-gear idle gear drives the second output shaft to rotate. If the synchronizer shift fork is moved to the high-gear idle gear side, the high-gear idle gear drives the second output shaft to rotate. Similarly, the third input shaft drives the output shaft to rotate in the same way. That is, the power coupling and speed adjustment of the dual drive motors are realized through the above-mentioned power coupling speed change device in the AMT device. It has a high degree of integration, compact structure, and is easy to arrange in the whole machine.

[0015] Furthermore, the above technical solution also includes a vehicle controller and an engine controller, a first generator controller, a second generator controller, a first drive motor controller, and a second drive motor controller connected to the vehicle controller; the vehicle controller controls the engine through the engine controller, controls the first generator through the first generator controller, controls the second generator through the second generator controller, controls the first drive motor through the first drive motor controller, and controls the second drive motor through the second drive motor controller.

[0016] Furthermore, the above technical solution also includes a battery management system, which is connected to the vehicle controller and the power battery.

[0017] To solve the above-mentioned technical problems, the present invention provides a tractor, including a hybrid power system for a tractor with the above-mentioned technical solution.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 A block diagram of a hybrid tractor power system provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the AMT device structure provided in an embodiment of the present invention. Detailed Implementation

[0021] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0022] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0023] Figure 1 This is a block diagram of a hybrid tractor power system provided in an embodiment of the present invention. Figure 1 As shown, the system includes: engine 1, first generator 2, second generator 3, first drive motor 4, second drive motor 5, AMT device 6, power output device 7, rear axle 8, rear wheel set 9, high voltage power distribution device 16, and power battery 18.

[0024] Engine 1, first generator 2, and second generator 3 are sequentially connected by transmission. Second generator 3 is connected by transmission to the first input shaft of AMT device 6. First output shaft of AMT device 6 is connected by transmission to power output device 7. First input shaft is connected by transmission to first output shaft. First drive motor 4 is connected by transmission to second input shaft of AMT device 6. Second drive motor 5 is connected by transmission to third input shaft of AMT device 6. Second output shaft of AMT device 6 is connected by transmission to rear axle 8. Rear axle 8 is connected by transmission to rear wheel set 9. Second input shaft and third input shaft are both connected by transmission to second output shaft. First input shaft, second input shaft, third input shaft, first output shaft, and second output shaft are arranged parallel to each other. First generator 2, second generator 3, first drive motor 4, and second drive motor 5 are all electrically connected to high-voltage power distribution device 16. High-voltage power distribution device 16 is electrically connected to power battery 18.

[0025] In the above embodiments of the present invention, two generators are arranged coaxially, and two drive motors are arranged coaxially. The AMT device has three input ports and two output ports. The first input shaft of the AMT device is driven by the first output shaft, realizing the output of engine drive power; the second input shaft and the third input shaft are driven by the second output shaft, realizing the power coupling of the dual-motor drive system. The present invention uses dual drive motors to provide the power of the whole machine and dual generators to provide electrical energy, which can simultaneously meet the needs of tractors for high horsepower and long range. Compared with the single-motor high-horsepower hybrid system, the dual-motor system reduces the design and manufacturing difficulty of the motors. Moreover, the hybrid tractor power system provided by the embodiments of the present invention has a compact structure, which is convenient for the overall layout; it is economical, environmentally friendly, energy-saving and efficient.

[0026] Optionally, in one embodiment, a first driving gear is fixed on the first input shaft of the AMT device 6, and a first driven gear is fixed on the first output shaft, with the first driving gear meshing with the first driven gear. This embodiment of the invention achieves a transmission connection between the first input shaft and the first output shaft by meshing the first driving gear on the first input shaft with the first driven gear on the first output shaft. The engine speed is transmitted to the power output device through a gear set composed of the first driving gear and the first driven gear, thus realizing the speed change function of power output.

[0027] Optionally, in one embodiment, a second drive gear is fixed on the second input shaft of the AMT device 6, and a third drive gear is fixed on the third input shaft. Both the second and third drive gears mesh with a power coupling transmission device; the power coupling transmission device is connected to the second output shaft. This embodiment of the invention achieves power coupling and speed adjustment of the dual drive motors by connecting the second input shaft, third input shaft, and second output shaft via a power coupling transmission device. Furthermore, this AMT transmission component has a high degree of integration, a compact structure, and is easy to arrange in the overall machine layout.

[0028] Optionally, in one embodiment, the power coupling transmission device includes a first intermediate shaft and a second intermediate shaft arranged parallel to the second input shaft; a second driven gear, a first low-gear transmission gear, and a first high-gear transmission gear are fixed on the first intermediate shaft, and the second driven gear meshes with the second driving gear; a low-gear idler gear and a high-gear idler gear are fixed on the second output shaft, and the low-gear idler gear and the high-gear idler gear are connected by a synchronizer; the first low-gear transmission gear meshes with the low-gear idler gear, and the first high-gear transmission gear meshes with the high-gear idler gear; a third driven gear, a second low-gear transmission gear, and a second high-gear transmission gear are fixed on the second intermediate shaft; the third driven gear meshes with the third driving gear, the second low-gear transmission gear meshes with the low-gear idler gear, and the second high-gear transmission gear meshes with the high-gear idler gear.

[0029] In the above embodiment, the second input shaft drives the first intermediate shaft to rotate via the second driving gear and the second driven gear. The rotation of the first intermediate shaft drives the first low-gear transmission gear and the first high-gear transmission gear on the shaft. The first low-gear transmission gear drives the low-gear idle gear to rotate, and the first high-gear transmission gear drives the high-gear idle gear to rotate. If the synchronizer shift fork is shifted to the low-gear idle gear side, the low-gear idle gear drives the second output shaft to rotate. If the synchronizer shift fork is shifted to the high-gear idle gear side, the high-gear idle gear drives the second output shaft to rotate. Similarly, the third input shaft drives the output shaft to rotate in the same way. That is, the power coupling and speed adjustment of the dual drive motors are realized through the above-mentioned power coupling speed change device in the AMT device. Moreover, the AMT transmission component has a high degree of integration, a compact structure, and is easy to arrange in the whole machine.

[0030] The present invention will now be described in detail with reference to a specific embodiment.

[0031] The hybrid tractor power system includes: engine 1, first generator 2, second generator 3, first drive motor 4, second drive motor 5, AMT device 6, power output device 7, rear axle 8, rear wheel set 9, engine controller 10, first generator controller 11, second generator controller 12, vehicle controller 13, first drive motor controller 14, second drive motor controller 15, high voltage distribution box 16, battery management system 17, and power battery 18.

[0032] Engine 1, first generator 2, and second generator 3 are sequentially connected by transmission. Second generator 3 is connected to the first input shaft of AMT device 6. The first output shaft of AMT device 6 is connected to power output device 7. The first input shaft is connected to the first output shaft. First drive motor 4 is connected to the second input shaft of AMT device 6. Second drive motor 5 is connected to the third input shaft of AMT device 6. The second output shaft of AMT device 6 is connected to rear axle 8. Rear axle 8 is connected to rear wheel assembly 9. Both the second and third input shafts are connected to the second output shaft. The first, second, and third input shafts, as well as the first and second output shafts, are arranged parallel to each other.

[0033] The first generator 2 is connected to the high-voltage power distribution device 16 through the first generator controller 11, the second generator 3 is connected to the high-voltage power distribution device 16 through the second generator controller 12, the first drive motor 4 is connected to the high-voltage power distribution device 16 through the first motor controller 14, the second drive motor 5 is connected to the high-voltage power distribution device 16 through the second drive motor controller 15, and the high-voltage power distribution device 16 is connected to the power battery 18.

[0034] The first generator controller 11, the second generator controller 12, the first drive motor controller 14, and the second drive motor controller 15 are all connected to the vehicle controller 13; the vehicle controller 13 is connected to the engine controller 10, the engine controller 10 is connected to the engine 1, the vehicle controller 13 is connected to the battery management system 17, and the battery management system 17 is connected to the power battery 18.

[0035] The vehicle controller 13 collects information from the first generator controller 11, the second generator controller 12, the first drive motor controller 14, the second drive motor controller 15, the engine controller 10, and the battery management system 17 to control the first generator 2 and the second generator 3 to generate electricity, which is then directly supplied to the first drive motor 4 and the second drive motor 5 through the high-voltage distribution box 16. The power battery 18 mainly serves as an energy buffer.

[0036] Specifically, the AMT device 6 includes a first input shaft 6-1, a first output shaft 6-20, a second input shaft 6-4, a first intermediate shaft 6-7, a second output shaft 6-18, a second intermediate shaft 6-15, and a third input shaft 6-12 arranged in parallel with each other.

[0037] A first driving gear 6-2 is fixed on the first input shaft 6-1, and a first driven gear 6-3 is fixed on the first output shaft 6-20. The first driving gear 6-2 meshes with the first driven gear 6-3. A second driving gear 6-5 is fixed on the second input shaft 6-4, and a second driven gear 6-6, a first low-gear transmission gear 6-8, and a first high-gear transmission gear 6-19 are fixed on the first intermediate shaft 6-7. The second driving gear 6-5 meshes with the second driven gear 6-6. A low-gear idler gear 6-9 and a high-gear idler gear 6-17 are fixed on the second output shaft 6-18. The low-gear idler gear 6-9 and the high-gear idler gear 6-17 are connected by a synchronizer 6-16. The first low-gear transmission gear 6-8 meshes with the low-gear idler gear 6-9, and the first high-gear transmission gear 6-19 meshes with the high-gear idler gear 6-17. The third driven gear 6-10, the second low-gear transmission gear 6-11, and the second high-gear transmission gear 6-14 are fixed on the second intermediate shaft. The second low-gear transmission gear 6-11 meshes with the low-gear unloaded gear 6-9, and the second high-gear transmission gear 6-14 meshes with the high-gear unloaded gear 6-17. The third driving gear 6-13 is fixed on the third input shaft 6-12, and the third driving gear 6-13 meshes with the third driven gear 6-10.

[0038] When the hybrid tractor power system provided in this embodiment of the invention is working, the engine 1 drives the first generator 2 and the second generator 3 to work. The first generator 2 and the second generator 3 supply electrical energy to the first drive motor 4 and the second drive motor 5 through the high-voltage distribution box 16, while the power battery buffers energy fluctuations. The generator 1 provides power to the power output device 7 through the first input shaft and the first output shaft of the AMT device, and can realize the speed change function.

[0039] The first drive motor 4 drives the second input shaft of the AMT device 6 to rotate, and the second drive motor 5 drives the third input shaft of the AMT device 6 to rotate. The second and third input shafts achieve power coupling and speed change functions through the first intermediate shaft, the second intermediate shaft and related gears, and output power to the rear axle through the second output shaft. The rear axle drives the rear wheel set to rotate.

[0040] In the hybrid tractor power system provided in this embodiment of the invention, the power generated by the first drive motor 4 and the second drive motor 5 is coupled through the AMT device 6 and transmitted to the wheels via the rear axle, thereby driving the vehicle. The power generated by the engine 1 can be used to generate electricity for the first generator 2 and the second generator 3, and can also be transmitted to the power output device 7 via the AMT device 6. The two power transmission routes are independent within the AMT device 6. The hybrid tractor power system provided in this embodiment of the invention has a compact structure, a high degree of integration of the AMT device, and is easy to arrange in the overall machine; it is economical, environmentally friendly, energy-saving, and efficient.

[0041] This invention also provides a tractor, including the hybrid power system of the tractor described above.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hybrid power system for a tractor, characterized in that, include: Engine, first generator, second generator, first drive motor, second drive motor, AMT device, power output device, rear axle, rear wheel set, high-voltage power distribution device and power battery; The engine, the first generator, and the second generator are sequentially connected by transmission. The second generator is connected by transmission to the first input shaft of the AMT device, and the first output shaft of the AMT device is connected by transmission to the power output device. The first input shaft is connected by transmission to the first output shaft. A first driving gear is fixed on the first input shaft, and a first driven gear is fixed on the first output shaft. The first driving gear meshes with the first driven gear. The first drive motor is driven by the second input shaft of the AMT device, the second drive motor is driven by the third input shaft of the AMT device, the second output shaft of the AMT device is driven by the rear axle, and the rear axle is driven by the rear wheel assembly; both the second input shaft and the third input shaft are driven by the second output shaft; the first input shaft, the second input shaft, the third input shaft, the first output shaft, and the second output shaft are arranged parallel to each other; A second driving gear is fixed on the second input shaft, and a third driving gear is fixed on the third input shaft. Both the second and third driving gears mesh with the power coupling transmission device; the power coupling transmission device is connected to the second output shaft. The power coupling transmission device includes a first intermediate shaft and a second intermediate shaft arranged parallel to the second input shaft. A second driven gear, a first low-gear transmission gear, and a first high-gear transmission gear are fixed on the first intermediate shaft, and the second driven gear meshes with the second driving gear. A low-gear and a high-gear are fixed on the second output shaft. The low-gear and the high-gear are connected by a synchronizer. The first low-gear drive gear meshes with the low-gear and the first high-gear drive gear meshes with the high-gear. A third driven gear, a second low-gear transmission gear, and a second high-gear transmission gear are fixed on the second intermediate shaft; the third driven gear meshes with the third driving gear, the second low-gear transmission gear meshes with the low-gear unloaded gear, and the second high-gear transmission gear meshes with the high-gear unloaded gear. The first generator, the second generator, the first drive motor, and the second drive motor are all electrically connected to the high-voltage power distribution device, which is electrically connected to the power battery.

2. The hybrid tractor power system according to claim 1, characterized in that, It also includes a vehicle controller and an engine controller, a first generator controller, a second generator controller, a first drive motor controller, and a second drive motor controller connected to the vehicle controller; The vehicle controller controls the engine through the engine controller, the first generator through the first generator controller, the second generator through the second generator controller, the first drive motor through the first drive motor controller, and the second drive motor through the second drive motor controller.

3. The hybrid tractor power system according to claim 2, characterized in that, It also includes a battery management system, which is connected to the vehicle controller and the power battery.

4. A tractor, characterized in that, Includes the hybrid tractor power system as described in any one of claims 1 to 3.

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