Intelligent control transmission system for combined motor of tractor

Abstract

The invention belongs to the technical field of tractors, and particularly relates to a tractor combined motor intelligent control transmission system which comprises an engine, the crankshaft output end of the engine is in transmission connection with an input shaft of a generator, and the generator is electrically connected with a driving motor and a power battery through a high-voltage power distribution assembly. The output shaft of the driving motor is in transmission connection with the input end of the gearbox assembly, when the generating capacity of the generator is larger than the electric quantity needed by the driving motor, one part of the generating capacity of the generator is transmitted to the driving motor, and the other part of the generating capacity is transmitted to the power battery; when the generating capacity of the generator is smaller than the electric quantity required by the driving motor, the generating capacity of the generator and the electric quantity of the power battery are transmitted to the driving motor. The engine provides power for the generator, the output torque of the gearbox assembly is controlled through the driving motor, redundant electric quantity is stored through the power battery, the power battery and the generator supply power to the power battery together when the driving motor outputs high power, and the electric quantity is reasonably distributed.

Description

Technical field:

[0001] The invention belongs to the technical field of tractors, and in particular relates to an intelligent control transmission system of a tractor combined motor. Background technology:

[0002] At present, most tractors on the market still use diesel engines as their power source. This traditional diesel engine tractor + manual transmission as a power transmission chain is not only noisy, has a large gear shift shock, low efficiency, but also seriously pollutes the environment and requires high driver operation intensity. Electric tractors use electricity to drive the tractor to move, and can achieve the function of stepless speed change. Compared with traditional diesel tractors, electric tractors have the advantages of simple operation, stepless speed change, low emissions, low noise, and high energy utilization. However, the existing electric technology is still immature, and one of its technical difficulties is insufficient endurance. Summary of the invention:

[0003] The purpose of the present invention is to provide a tractor combined motor intelligent control transmission system, wherein the engine provides power for the generator, converts mechanical energy into electrical energy, controls the output power of the drive motor to control the output torque of the gearbox assembly, stores excess electricity with the help of a power battery, and supplies power to the drive motor together with the generator when the drive motor outputs high power, so that the engine can work within a high-efficiency range, has good fuel consumption, works stably and efficiently, and has a high comprehensive energy utilization rate.

[0004] The present invention is achieved in that:

[0005] A tractor combined motor intelligent control transmission system, characterized in that: it includes an engine, the crankshaft output end of the engine is drivingly connected to the input shaft of a generator, the generator is electrically connected to a drive motor and a power battery for charging and discharging energy through a high-voltage power distribution assembly, the output shaft of the drive motor is drivingly connected to the input end of a gearbox assembly,

[0006] When the amount of electricity generated by the generator is greater than the amount of electricity required for the output power of the drive motor, the VCU controller controls the high-voltage power distribution assembly to transmit part of the amount of electricity generated by the generator to the drive motor and the other part to the power battery;

[0007] When the generator's power generation is less than the power required for the drive motor's output power, the VCU controller controls the generator's power generation and the power of the power battery to be transmitted to the drive motor through the high-voltage power distribution assembly.

[0008] In the above-mentioned tractor combined motor intelligent control transmission system, the VCU controller is electrically connected to the range extender generator controller and the drive motor controller, and the range extender generator controller controls the output power of the engine according to the signal of the VCU controller to adjust the power generation of the generator, and the drive motor controller controls the output power of the drive motor according to the signal of the VCU controller.

[0009] In the above-mentioned tractor combined motor intelligent control transmission system, the generator and the drive motor are axially arranged between the engine and the gearbox assembly, the PTO shaft of the gearbox assembly axially penetrates the output shaft of the drive motor and is splined to the inner end of the input shaft of the generator, and the PTO shaft, the output shaft of the drive motor, the input shaft of the generator and the crankshaft output end of the engine are all located on the same axis.

[0010] In the above-mentioned tractor combined motor intelligent control transmission system, the generator and the drive motor are both disc-type permanent magnet synchronous motors.

[0011] In the above-mentioned tractor combined motor intelligent control transmission system, the input end of the generator and the crankshaft output end of the engine are connected through a torsional vibration damper transmission, the input shaft of the generator is spline-connected to the torsional vibration damper, and the torque vibration damper is connected to the flywheel of the engine.

[0012] In the above-mentioned tractor combined motor intelligent control transmission system, the gearbox assembly includes a gearbox housing, the PTO shaft is rotatably connected to the gearbox housing, an input shaft is supported on the gearbox housing, the input shaft is a hollow shaft, the other end of the PTO shaft is supported on the inner hole of the input shaft through a bushing, the input shaft is connected to the output shaft of the driving motor with a spline sleeve, the gearbox housing supports the output shaft, and a gear transmission component is arranged between the input shaft and the output shaft.

[0013] In the above-mentioned tractor combined motor intelligent control transmission system, the gear transmission component includes a first gear driving gear, a second gear driving gear and a third gear meshing sleeve or synchronizer fixedly sleeved on the input shaft, the input shaft is rotatably sleeved with the third gear driving gear, and the third gear driving gear can be combined with the third gear meshing sleeve or synchronizer to achieve synchronous rotation of the third gear driving gear and the input shaft, the output shaft is rotatably sleeved with a first gear driven gear meshing with the first gear driving gear, and a second gear driven gear meshing with the second gear driving gear, the output shaft is fixedly sleeved with a first and second gear meshing sleeve or synchronizer located between the first gear driven gear and the second gear driven gear, and a third gear driven gear meshing with the third gear driving gear, the first gear driven gear or the second gear driven gear can be combined with the first and second gear meshing sleeve or synchronizer to achieve synchronous rotation of the first gear driven gear or the second gear driven gear and the output shaft.

[0014] In the above-mentioned tractor combined motor intelligent control transmission system, a four-wheel drive intermediate shaft and a four-wheel drive output shaft are rotatably connected on the gearbox housing, a four-wheel drive driving gear is fixedly sleeved on the output shaft, an intermediate gear meshing with the four-wheel drive driving gear is fixedly sleeved on the four-wheel drive intermediate shaft, a four-wheel drive driven gear is rotatably sleeved on the four-wheel drive output shaft, and the four-wheel drive driven gear rotates synchronously or relatively with the four-wheel drive output shaft through a four-wheel drive clutch, and one end of the four-wheel drive output shaft extends out of the gearbox housing and is connected to the front drive axle through a universal drive shaft.

[0015] The outstanding advantages of the present invention compared with the prior art are:

[0016] The present invention has a reasonable design, high energy transmission efficiency and long cruising range. The engine provides power to the generator to convert mechanical energy into electrical energy. The output power of the drive motor is controlled to control the output torque of the gearbox assembly. The power battery is used to store excess electricity. When the drive motor outputs high power, the power battery and the generator are used together to supply power to it. The electricity is reasonably distributed, so that the engine can work within a high-efficiency range, has good fuel consumption, works stably and efficiently, and has a high comprehensive energy utilization rate. Description of the drawings:

[0017] Figure 1 is a diagram of the electronic control structure of the transmission system of the present invention;

[0018] Figure 2 It is a transmission diagram of the transmission system of the present invention.

[0019] In the figure: 1. Engine; 2. Generator; 3. High-voltage power distribution assembly; 4. Drive motor; 5. Power battery; 6. Gearbox assembly; 7. VCU controller; 8. Range extender generator controller; 9. Drive motor controller; 10. PTO shaft; 11. Torsional vibration damper; 12. Gearbox housing; 13. Input shaft; 14. Output shaft; 15. First gear driving gear; 16. Second gear driving gear; 17. Third gear meshing sleeve or synchronizer; 18. Third gear driving gear; 19. First gear driven gear; 20. Second gear driven gear; 21. First and second gear meshing sleeves or synchronizer; 22. Third gear driven gear; 23. Four-wheel drive intermediate shaft; 24. Four-wheel drive output shaft; 25. Four-wheel drive driving gear; 26. Intermediate gear; 27. Four-wheel drive driven gear; 28. Four-wheel drive clutch. Specific implementation method:

[0020] The present invention is further described below with reference to specific embodiments. Figure 1 —2:

[0021] A tractor combined motor intelligent control transmission system, characterized in that: it includes an engine 1, the crankshaft output end of the engine 1 is drivingly connected to the input shaft of a generator 2, the generator 2 is electrically connected to a drive motor 4 and a power battery 5 for charging and discharging energy through a high-voltage power distribution assembly 3, the output shaft of the drive motor 4 is drivingly connected to the input end of a gearbox assembly 6,

[0022] When the power generation of the generator 2 is greater than the power required by the drive motor 4 to output power, the VCU controller 7 controls the high-voltage power distribution assembly 3 to transmit part of the power generation of the generator 2 to the drive motor 4 and the other part to the power battery 5;

[0023] When the power generated by the generator 2 is less than the power required by the drive motor 4 to output power, the VCU controller 7 controls the power generated by the generator 2 and the power of the power battery 5 to be transmitted to the drive motor 4 through the high-voltage power distribution assembly 3.

[0024] Furthermore, in the present embodiment, the VCU controller 7 is electrically connected to the range extender generator controller 8 and the drive motor controller 9. The range extender generator controller 8 controls the output power of the engine 1 according to the signal of the VCU controller 7 to adjust the power generation of the generator 2, and the drive motor controller 9 controls the output power of the drive motor 4 according to the signal of the VCU controller 7.

[0025] Among them, the engine 1 and the generator 2 are mechanically driven to drive the generator 2 to generate electricity, and the electricity is transmitted to the power battery 5 or the drive motor 4 through the cable in the high-voltage distribution assembly 3 according to the signal of the VCU controller 7. It should be noted that since the output power of the drive motor 4 is positively correlated with the required power consumption, and the ratio of the output power to the power consumption of each specification and model of the drive motor 4 is different, similarly, the power generated by each specification and model of the generator 2 is positively correlated with the output power of the engine 1 driving the generator 2, but the ratio is different, so the corresponding energy conversion method should be set in combination with the actual generator 2 and the drive motor 4 used. That is, the VCU controller 7 calculates the power required for the output power of the drive motor 4 according to the power required by the gearbox assembly 6, and controls the high-voltage distribution assembly 3 to reasonably distribute the power in combination with the power generation of the generator 2 at this time. The output power of the engine 1 is separated from the output power of the actual gearbox assembly 6, so the engine 1 can continue to work in the high-efficiency range, thereby showing good fuel consumption. The power battery 5 serves as a storage container for electric energy. When the drive motor 4 outputs high power, it can supply power to the drive motor 4 together with the generator 2. As a result, the engine 1 does not need to work at an overload, thereby effectively extending the service life of the engine 1.

[0026] The present invention has a reasonable design, high energy transmission efficiency and long cruising range. The engine 1 provides power for the generator 2, converts mechanical energy into electrical energy, controls the output torque of the gearbox assembly 6 through the drive motor 4, stores excess electricity with the help of the power battery 5, and supplies power to the drive motor 4 together with the generator 2 when the drive motor 4 outputs high power, reasonably distributes electricity, and enables the engine 1 to work within a high-efficiency range, has good fuel consumption, works stably and efficiently, and has a high comprehensive energy utilization rate.

[0027] Furthermore, considering that the PTO shaft 10 of the tractor needs to be directly connected to the engine 1, on the basis of the above-mentioned structure of the generator 2 and the drive motor 4, the generator 2 and the drive motor 4 are axially arranged between the engine 1 and the gearbox assembly 6, and the PTO shaft 10 of the gearbox assembly 6 axially penetrates the output shaft of the drive motor 4 and is splined to the inner end of the input shaft of the generator 2, that is, the PTO shaft 10, the output shaft of the drive motor 4, the input shaft of the generator 2 and the crankshaft output end of the engine 1 are all located on the same axis, which effectively improves the transmission stability of the generator 2 and the drive motor 4 between the engine 1 and the gearbox assembly 6. In addition, in the present embodiment, the generator 2 and the drive motor 4 are both compact disc permanent magnet synchronous motors, which makes the transmission system of the tractor of the present invention compact and effectively controls the wheelbase size of the tractor.

[0028] In addition, in order to reduce the vibration amount generated by the power transmission between the engine 1 and the generator 2, the input end of the generator 2 and the crankshaft output end of the engine 1 are connected through a torsional vibration damper 11, the input shaft of the generator 2 is spline-connected to the torsional vibration damper 11, and the torque vibration damper 11 is connected to the flywheel of the engine 1.

[0029] Furthermore, the specific structure adopted by the gearbox assembly 6 is as follows: the gearbox assembly 6 includes a gearbox housing 12, the PTO shaft 10 is rotatably connected to the gearbox housing 12, an input shaft 13 is supported on the gearbox housing 12, the input shaft 13 is a hollow shaft, the other end of the PTO shaft 10 is supported in the inner hole of the input shaft 13 through a bushing, the input shaft 13 is connected to the output shaft of the drive motor 4 with a spline sleeve, the gearbox housing 12 supports an output shaft 14, and a gear transmission component for field operations is arranged between the input shaft 13 and the output shaft 14.

[0030] The gear transmission assembly can be designed according to the actual operation requirements of the tractor. In this embodiment, the gear transmission assembly includes a first gear driving gear 15, a second gear driving gear 16 and a third gear meshing sleeve or synchronizer 17 fixedly sleeved on the input shaft 13. The input shaft 13 is rotatably sleeved with a third gear driving gear 18, and the third gear driving gear 18 can be combined with the third gear meshing sleeve or synchronizer 17 to achieve synchronous rotation of the third gear driving gear 18 and the input shaft 13. The output shaft 14 is rotatably sleeved with a first gear driving gear 15, a second gear driving gear 16 and a third gear meshing sleeve or synchronizer 17. The first gear driven gear 19 meshes with the first gear driven gear 15, and the second gear driven gear 20 meshes with the second gear driving gear 16, the output shaft 14 is fixed with a first and second gear meshing sleeve or synchronizer 21 located between the first gear driven gear 19 and the second gear driven gear 20, and a third gear driven gear 22 meshed with the third gear driving gear 18, and the first gear driven gear 19 or the second gear driven gear 20 can be combined with the first and second gear meshing sleeve or synchronizer 21 to achieve the synchronous rotation of the first gear driven gear 19 or the second gear driven gear 20 and the output shaft 14. That is, this embodiment has a speed gear adjustment with three gears, which can meet the operation requirements of various working conditions of the tractor.

[0031] At the same time, in order to enable the tractor to have two modes of power travel, rear-wheel drive and four-wheel drive, so as to meet the ability of the tractor to travel under various working conditions, improve the performance of the tractor and increase the traction efficiency, the gearbox housing 12 is rotatably connected with a four-wheel drive intermediate shaft 23 and a four-wheel drive output shaft 24, the output shaft 14 is fixedly sleeved with a four-wheel drive driving gear 25, the four-wheel drive intermediate shaft 23 is fixedly sleeved with an intermediate gear 26 meshing with the four-wheel drive driving gear 25, and the four-wheel drive output shaft 24 is rotatably sleeved with a four-wheel drive driven gear 27, and the four-wheel drive driven gear 27 rotates synchronously or relatively with the four-wheel drive output shaft 24 through a four-wheel drive clutch 28, one end of the four-wheel drive output shaft 24 extends out of the gearbox housing 12 and is connected to the front drive axle through a universal drive shaft, that is, the four-wheel drive clutch 28 controls the power connection and separation between the four-wheel drive output shaft 24 and the output shaft 14.

[0032] The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tractor combined motor intelligent control transmission system, characterized in that: The invention comprises an engine (1), wherein the crankshaft output end of the engine (1) is drivingly connected to the input shaft of a generator (2), the generator (2) is electrically connected to a drive motor (4) and a power battery (5) for charging and discharging energy through a high-voltage power distribution assembly (3), the output shaft of the drive motor (4) is drivingly connected to the input end of a gearbox assembly (6), When the power generated by the generator (2) is greater than the power required by the drive motor (4) to output power, the VCU controller (7) controls the high-voltage power distribution assembly (3) to transmit part of the power generated by the generator (2) to the drive motor (4) and the other part to the power battery (5); When the power generation of the generator (2) is less than the power required for the output power of the drive motor (4), the VCU controller (7) controls the power generation of the generator (2) and the power of the power battery (5) to be transmitted to the drive motor (4) through the high-voltage power distribution assembly (3).

2. The tractor combined motor intelligent control transmission system according to claim 1, characterized in that: The VCU controller (7) is electrically connected to the range-extending generator controller (8) and the drive motor controller (9); the range-extending generator controller (8) controls the output power of the engine (1) according to the signal of the VCU controller (7) to adjust the power generation of the generator (2); and the drive motor controller (9) controls the output power of the drive motor (4) according to the signal of the VCU controller (7).

3. The tractor combined motor intelligent control transmission system according to claim 1, characterized in that: The generator (2) and the drive motor (4) are axially arranged between the engine (1) and the gearbox assembly (6); one end of the PTO shaft (10) of the gearbox assembly (6) axially penetrates the output shaft of the drive motor (4) and is spline-connected to the inner end of the input shaft of the generator (2); and the PTO shaft (10), the output shaft of the drive motor (4), the input shaft of the generator (2) and the crankshaft output end of the engine (1) are all located on the same axis.

4. A tractor combined motor intelligent control transmission system according to claim 1 or 3, characterized in that: The generator (2) and the drive motor (4) are both disc-type permanent magnet synchronous motors.

5. A tractor combined motor intelligent control transmission system according to claim 1 or 3, characterized in that: The input end of the generator (2) is connected to the crankshaft output end of the engine (1) through a torsional vibration damper (11), the input shaft of the generator (2) is spline-connected to the torsional vibration damper (11), and the torque vibration damper (11) is connected to the flywheel of the engine (1).

6. The tractor combined motor intelligent control transmission system according to claim 3, characterized in that: The gearbox assembly (6) comprises a gearbox housing (12), the PTO shaft (10) is rotatably connected to the gearbox housing (12), an input shaft (13) is supported on the gearbox housing (12), the input shaft (13) is a hollow shaft, the other end of the PTO shaft (10) is supported in the inner hole of the input shaft (13) through a bushing, the input shaft (13) and the output shaft of the drive motor (4) are connected by a spline sleeve, the gearbox housing (12) supports an output shaft (14), and a gear transmission assembly is arranged between the input shaft (13) and the output shaft (14).

7. The tractor combined motor intelligent control transmission system according to claim 6, characterized in that: The gear transmission assembly comprises a first gear driving gear (15), a second gear driving gear (16) and a third gear meshing sleeve or synchronizer (17) which are fixedly sleeved on an input shaft (13); a third gear driving gear (18) is rotatably sleeved on the input shaft (13), and the third gear driving gear (18) can be combined with the third gear meshing sleeve or synchronizer (17) to achieve synchronous rotation of the third gear driving gear (18) and the input shaft (13); a first gear driven gear (19) meshing with the first gear driving gear (15) is rotatably sleeved on the output shaft (14); A second gear driven gear (20) meshed with the second gear driving gear (16); a first and second gear meshing sleeve or a synchronizer (21) located between the first gear driven gear (19) and the second gear driven gear (20); and a third gear driven gear (22) meshed with the third gear driving gear (18) are fixedly sleeved on the output shaft (14); the first gear driven gear (19) or the second gear driven gear (20) can be combined with the first and second gear meshing sleeve or the synchronizer (21) to realize the synchronous rotation of the first gear driven gear (19) or the second gear driven gear (20) and the output shaft (14).

8. The tractor combined motor intelligent control transmission system according to claim 6, characterized in that: A four-wheel drive intermediate shaft (23) and a four-wheel drive output shaft (24) are rotatably connected on the gearbox housing (12); a four-wheel drive driving gear (25) is fixedly sleeved on the output shaft (14); an intermediate gear (26) meshing with the four-wheel drive driving gear (25) is fixedly sleeved on the four-wheel drive intermediate shaft (23); a four-wheel drive driven gear (27) is rotatably sleeved on the four-wheel drive output shaft (24); and the four-wheel drive driven gear (27) rotates synchronously or relatively with the four-wheel drive output shaft (24) through a four-wheel drive clutch (28); one end of the four-wheel drive output shaft (24) extends out of the gearbox housing (12) and is connected to the front drive axle through a universal transmission shaft.

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