Combined motor gearbox assembly of tractor

Abstract

The utility model belongs to the technical field of tractors, and particularly relates to a tractor combined motor gearbox assembly which comprises a gearbox body, a generator and a driving motor are coaxially arranged on the side wall of the gearbox body, the outer end of an input shaft of the generator is in transmission connection with the crankshaft output end of an engine, and an input shaft is supported on the gearbox body. The input shaft is a hollow shaft, one end of the PTO shaft axially penetrates through the output shaft of the driving motor and is connected with a spline at the inner end of the input shaft of the generator, the other end of the PTO shaft is supported in an inner hole of the input shaft through a lining, the input shaft is connected with the inner end of the output shaft of the driving motor through a spline sleeve, and the gearbox body supports the output shaft. A gear transmission assembly is arranged between the input shaft and the output shaft. The PTO shaft is directly connected with the output shaft of the engine, the engine provides power for the generator to provide electric energy for the driving motor, then the driving motor provides power for the gearbox assembly, the operation requirement of the tractor is met, and stepless speed change can be achieved.

Description

Technical field:

[0001] The utility model belongs to the technical field of tractors, in particular to a tractor combined motor and gearbox assembly. Background technology:

[0002] Currently, most tractors on the market are still powered by diesel engines. This traditional diesel tractor coupled with a manual transmission is not only noisy, has significant shift shock, and is inefficient, but also severely pollutes the environment and requires heavy driver effort. Electric tractors, on the other hand, use electricity to propel the tractor, enabling infinitely variable speeds. Compared to traditional diesel tractors, electric tractors offer advantages such as simple operation, continuously variable speeds, low emissions, low noise, and high energy efficiency. However, existing electric technology remains immature, and one of the technical challenges is insufficient battery life. Summary of the invention:

[0003] The purpose of the utility model is to provide a tractor combined motor-gearbox assembly, wherein the PTO shaft is directly connected to the output shaft of the engine, the generator is powered by the engine to provide electrical energy to the drive motor, and the drive motor then provides power to the gearbox assembly, which not only meets the operating requirements of the tractor and can achieve stepless speed change, but also allows the engine to operate within a high-efficiency range, with good fuel consumption and good comprehensive energy utilization.

[0004] The utility model is achieved in this way:

[0005] A tractor combined motor and gearbox assembly includes a gearbox housing, a generator and a drive motor are coaxially arranged on the side wall of the gearbox housing, and the generator provides power to the drive motor. The outer end of the generator's input shaft is connected to the crankshaft output end of the engine. The gearbox housing supports an input shaft, which is a hollow shaft. One end of the PTO shaft axially penetrates the output shaft of the drive motor and is spline-connected to the inner end of the generator's input shaft. 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. The other end of the PTO shaft is supported on the inner hole of the input shaft through a bushing. The input shaft and the inner end of the output shaft of the drive motor are connected with a spline sleeve. The gearbox housing supports the output shaft, and a gear transmission assembly is provided between the input shaft and the output shaft. Output shaft

[0006] In the above-mentioned tractor combined motor-gearbox assembly, the generator and the drive motor are both disc-type permanent magnet motors.

[0007] In the above-mentioned tractor combined motor-gearbox assembly, the input end of the generator and the output end of the engine are connected through a torsional vibration damper, the input shaft of the generator is spline-connected to the torsional vibration damper, and the torque damper is connected to the flywheel of the engine.

[0008] In the above-mentioned tractor combined motor gearbox assembly, the gear transmission component includes a first-gear driving gear, a second-gear driving gear and a third-gear meshing sleeve or a third-gear synchronizer fixedly sleeved on the input shaft; the third-gear driving gear is rotatably sleeved on the input shaft, and the third-gear driving gear can be combined with the third-gear meshing sleeve or the third-gear synchronizer to achieve synchronous rotation of the third-gear driving gear and the input shaft; the first-gear driven gear meshing with the first-gear driving gear and the second-gear driven gear meshing with the second-gear driving gear are rotatably sleeved on the output shaft; the first-gear meshing sleeve or the first-gear synchronizer located between the first-gear driven gear and the second-gear driven gear, and the 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-gear meshing sleeve or the first-gear synchronizer to achieve synchronous rotation of the first-gear driven gear or the second-gear driven gear and the output shaft.

[0009] In the above-mentioned tractor combined motor gearbox assembly, a four-wheel drive intermediate shaft and a four-wheel drive output shaft are rotatably connected to 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 joint.

[0010] The outstanding advantages of the utility model compared with the prior art are:

[0011] The utility model has a reasonable design, compact structure and stable transmission, adopts a serial combination structure of a generator and a drive motor, and its PTO shaft passes through the output shaft of the drive motor to be linked with the input shaft of the generator. The generator is powered by the engine to provide electrical energy to the drive motor, and the drive motor then provides power to the gearbox assembly. Not only can the tractor achieve stepless speed change, but the engine operation can also be maintained in the high-efficiency range, with good fuel consumption and good comprehensive energy utilization. Description of the drawings:

[0012] Figure 1 It is a schematic diagram of the overall transmission of the utility model.

[0013] In the figure: 1. gearbox housing; 2. generator; 3. drive motor; 4. engine; 5. PTO shaft; 6. input shaft; 7. output shaft; 8. torsional vibration damper; 9. first gear driving gear; 10. second gear driving gear; 11. third gear meshing sleeve or third gear synchronizer; 12. third gear driving gear; 13. first gear driven gear; 14. second gear driven gear; 15. first and second gear meshing sleeve or first and second gear synchronizer; 16. third gear driven gear; 17. four-wheel drive intermediate shaft; 18. four-wheel drive output shaft; 19. four-wheel drive driving gear; 20. intermediate gear; 21. four-wheel drive driven gear; 22. four-wheel drive clutch. Specific implementation method:

[0014] The present invention is further described below with reference to specific embodiments. Figure 1 :

[0015] A tractor combined motor gearbox assembly includes a gearbox case 1, on the side wall of which a generator 2 and a drive motor 3 are coaxially arranged in parallel, and the generator 2 provides electricity to the drive motor 3. The input shaft of the generator 2 is spline-connected to the inner side of a torsional vibration damper 8, and the torque vibration damper 8 is connected to the flywheel of the engine 2. The gearbox case 1 supports an input shaft 6, which is a hollow shaft. One end of a PTO shaft 5 axially penetrates the output shaft of the drive motor 3 and is spline-connected to the inner end of the input shaft of the generator 2. The PTO shaft 5, the output shaft of the drive motor 3, the input shaft of the generator 2 and the crankshaft output end of the engine 4 are all located on the same axis. The other end of the PTO shaft 5 is supported by a bushing in the inner hole of the input shaft 6, and the input shaft 6 is connected to the output shaft of the drive motor 3 by a spline sleeve. The gearbox case 1 supports an output shaft 7, and a gear transmission assembly for field operations is provided between the input shaft 6 and the output shaft 7.

[0016] The output shaft of the utility model is reasonably designed, compact in structure and has stable transmission. It adopts a serial combination structure of the generator 2 and the drive motor 3. Its PTO shaft 5 passes through the output shaft of the drive motor 3 to be linked with the input shaft of the generator 2. The generator 2 is powered by the engine 4 to provide electrical energy to the drive motor 3, and the drive motor 3 then provides power to the gearbox assembly. Not only can the tractor achieve stepless speed change, but the engine 4 can also operate within the high-efficiency range, with good fuel consumption and good comprehensive energy utilization.

[0017] In this embodiment, the generator 2 and the drive motor 3 are both compact disc-type permanent magnet synchronous motors, which can effectively shorten the axial size.

[0018] Furthermore, in order to reduce the torsional vibration generated by the power transmission between the engine 4 and the generator 2 , the input end of the generator 2 and the output end of the engine 4 are connected via a torsional vibration damper 8 .

[0019] 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 9, a second gear driving gear 10 and a third gear meshing sleeve or a third gear synchronizer 11 fixed on the input shaft 6. The input shaft 6 is rotatably sleeved with a third gear driving gear 12, and the third gear driving gear 12 can be combined with the third gear meshing sleeve or the third gear synchronizer 11 to achieve synchronous rotation of the third gear driving gear 12 and the input shaft 6. The output shaft 7 is rotatably sleeved with the first gear driving gear 9. The first gear driven gear 13 is meshed with the second gear driven gear 14, and the second gear driven gear 14 is meshed with the second gear driving gear 10. A first and second gear meshing sleeve or a first and second gear synchronizer 15 is fixedly sleeved on the output shaft 7 and is located between the first gear driven gear 13 and the second gear driven gear 14, and a third gear driven gear 16 is meshed with the third gear driving gear 12. The first gear driven gear 13 or the second gear driven gear 14 can be combined with the first and second gear meshing sleeve or the first and second gear synchronizer 15 to achieve synchronous rotation of the first gear driven gear 13 or the second gear driven gear 14 and the output shaft 7. That is, this embodiment has three gear speed range adjustments, which can meet the operating requirements of various working conditions of the tractor.

[0020] At the same time, in order to enable the tractor to have both rear-wheel drive and four-wheel drive power travel modes, so as to meet the tractor's ability to travel under various working conditions, improve the tractor's performance and increase traction efficiency, the gearbox housing 1 is rotatably connected with a four-wheel drive intermediate shaft 17 and a four-wheel drive output shaft 18, the output shaft 7 is fixedly sleeved with a four-wheel drive driving gear 19, the four-wheel drive intermediate shaft 17 is fixedly sleeved with an intermediate gear 20 that meshes with the four-wheel drive driving gear 19, and the four-wheel drive output shaft 18 is rotatably sleeved with a four-wheel drive driven gear 21, and the four-wheel drive driven gear 21 rotates synchronously or relatively with the four-wheel drive output shaft 18 through a four-wheel drive clutch 22, one end of the four-wheel drive output shaft 18 extends out of the gearbox housing 1 and is connected to the front drive axle through a universal joint, that is, the four-wheel drive clutch 22 controls the power connection and separation between the four-wheel drive output shaft 18 and the output shaft 7.

[0021] 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 scope of protection of the present invention.

Claims

1. A tractor combined motor and gearbox assembly, characterized by: The invention comprises a gearbox housing (1), wherein a generator (2) and a drive motor (3) are coaxially arranged on a side wall of the gearbox housing (1), and the generator (2) provides electricity to the drive motor (3), and the outer end of the input shaft of the generator (2) is transmission-connected to the output end of the crankshaft of the engine (4); an input shaft (6) is supported on the gearbox housing (1), and the input shaft (6) is a hollow shaft; one end of a PTO shaft (5) axially penetrates the output shaft of the drive motor (3) and is spline-connected to the inner end of the input shaft of the generator (2); and the PTO shaft (5), the output shaft of the drive motor (3), the input shaft of the generator (2) and the output end of the crankshaft of the engine (4) are all located on the same axis; the other end of the PTO shaft (5) is supported on the inner hole of the input shaft (6) through a bushing; the input shaft (6) and the output shaft of the drive motor (3) are connected by a spline sleeve; the gearbox housing (1) supports an output shaft (7), and a gear transmission assembly is provided between the input shaft (6) and the output shaft (7).

2. The tractor motor-gearbox assembly according to claim 1, characterized in that: The generator (2) and the drive motor (3) are both disc-type permanent magnet motors.

3. The tractor combined motor and gearbox assembly according to claim 1, characterized in that: The input end of the generator (2) and the output end of the engine (4) are connected through a torsional vibration damper (8). The input shaft of the generator (2) is spline-connected to the torsional vibration damper (8), and the torque vibration damper (8) is connected to the flywheel of the engine (4).

4. The tractor combined motor and gearbox assembly according to claim 1, characterized in that: The gear transmission assembly comprises a first gear driving gear (9), a second gear driving gear (10) and a third gear meshing sleeve or a third gear synchronizer (11) fixedly sleeved on the input shaft (6); a third gear driving gear (12) is rotatably sleeved on the input shaft (6), and the third gear driving gear (12) can be combined with the third gear meshing sleeve or the third gear synchronizer (11) to achieve synchronous rotation of the third gear driving gear (12) and the input shaft (6); a first gear driven gear (13) meshing with the first gear driving gear (9) and a second gear driven gear (14) are rotatably sleeved on the output shaft (7). A second-gear driven gear (14) meshed with the driving gear (10) is fixedly sleeved on the output shaft (7) with a first- and second-gear meshing sleeve or a first- and second-gear synchronizer (15) located between the first-gear driven gear (13) and the second-gear driven gear (14), and a third-gear driven gear (16) meshed with the third-gear driving gear (12). The first-gear driven gear (13) or the second-gear driven gear (14) can be combined with the first- and second-gear meshing sleeve or the first- and second-gear synchronizer (15) to achieve synchronous rotation of the first-gear driven gear (13) or the second-gear driven gear (14) and the output shaft (7).

5. The tractor combined motor and gearbox assembly according to claim 1, characterized in that: The gearbox housing (1) is rotatably connected with a four-wheel drive intermediate shaft (17) and a four-wheel drive output shaft (18); a four-wheel drive driving gear (19) is fixedly sleeved on the output shaft (7); an intermediate gear (20) meshing with the four-wheel drive driving gear (19) is fixedly sleeved on the four-wheel drive intermediate shaft (17); a four-wheel drive driven gear (21) is rotatably sleeved on the four-wheel drive output shaft (18); and the four-wheel drive driven gear (21) rotates synchronously or relatively with the four-wheel drive output shaft (18) through a four-wheel drive clutch (22); one end of the four-wheel drive output shaft (18) extends out of the gearbox housing (1) and is connected to the front drive axle through a universal joint transmission shaft.

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