Hybrid power transmission mechanism

Abstract

The utility model relates to a hybrid power transmission mechanism, which comprises a first planet carrier input shaft, a second planet carrier input shaft, a third planet carrier input shaft, a fourth planet carrier input shaft and a fifth planet carrier output shaft, the first planetary gear set comprises a first sun gear, a first planet carrier and a first gear ring, the first planet carrier is fixedly connected with the first planet carrier input shaft, and the first sun gear is connected with the generator; the second planetary gear set comprises a second sun gear, a second planet carrier and a second gear ring, the second planet carrier is fixedly connected with the first gear ring, and the second sun gear is connected with the driving motor; the first brake is connected with the first gear ring; and the second brake is connected with the second gear ring. According to the hybrid power transmission mechanism, the power of the engine and the characteristics of low speed and large torque of the motor are utilized to the maximum extent, mechanical mechanisms of a gearbox are reduced, the fault occurrence rate is reduced, the working efficiency is improved, the fuel consumption is reduced, and the workload of operators is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hybrid power tractors, in particular to a hybrid power transmission mechanism. Background Art

[0002] Because tractors operate under extremely complex conditions, with high demands on speed, hydraulic output, and power output, transmissions require numerous gears to accommodate diverse operating requirements, making operation complex. Furthermore, conventional hybrid systems cannot operate under heavy loads for extended periods during high-speed forward and reverse operations, resulting in high failure rates and low efficiency. After years of experimentation and exploration, a hybrid powertrain mechanism was developed to address these challenges. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a hybrid power transmission mechanism, which makes maximum use of the power of the engine and the low-speed and high-torque characteristics of the motor, reduces the mechanical structure of the gearbox, reduces the failure rate, improves work efficiency, reduces fuel consumption, and reduces the workload of operators.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is:

[0005] A hybrid power transmission mechanism comprising:

[0006] A first planetary carrier input shaft, one end of which is connected to the flywheel of the engine, and the other end is connected to the power output shaft of the engine;

[0007] a first planetary gear set comprising a first sun gear, a first planet carrier and a first ring gear, wherein the first planet carrier is fixedly connected to the first planet carrier input shaft, and the first sun gear is connected to the generator;

[0008] a second planetary gear set comprising a second sun gear, a second planet carrier and a second ring gear, wherein the second planet carrier is fixedly connected to the first ring gear, and the second sun gear is connected to the drive motor;

[0009] a first brake connected to the first ring gear;

[0010] The second brake is connected to the second ring gear.

[0011] As an embodiment of the present invention, the generator shaft of the generator is rotatably and coaxially sleeved outside the first planetary carrier input shaft, and the first sun gear is fixedly connected to the generator shaft.

[0012] As an embodiment of the present invention, the drive motor shaft of the drive motor is rotatably coaxially sleeved outside the engine power output shaft, and the second sun gear is fixedly connected to the drive motor shaft.

[0013] As an embodiment of the present invention, the first sun gear is fixed to the generator shaft through a spline, the second sun gear is fixed to the drive motor shaft through a spline, the first planetary carrier is fixed to the first planetary carrier input shaft through a spline, and the second planetary carrier is rotatably sleeved on the outside of the engine power output shaft.

[0014] As an embodiment of the present invention, the middle portion of the first ring gear is a hollow shaft coaxially sleeved outside the first planetary carrier input shaft, and the second planetary carrier is connected to the hollow shaft via a spline.

[0015] As an implementation manner of the present utility model, a support bearing is provided between the first ring gear and the second planetary carrier; and an intermediate sleeve is provided between the hollow shaft and the input shaft of the first planetary carrier.

[0016] As an embodiment of the present invention, the flywheel of the engine is fixedly connected to the torsional vibration damper, the first planetary carrier input shaft is connected to the torsional vibration damper through a spline, and the engine power output shaft is connected to the first planetary carrier input shaft through a spline.

[0017] As an embodiment of the present invention, the first planetary gear set is arranged between the engine and the second planetary gear set, the drive motor shaft of the second planetary gear set is connected to the gearbox to drive the vehicle; the engine power output shaft is connected to the PTO gearbox to output power to the agricultural implement.

[0018] As an implementation manner of the present utility model, the first planetary gear set and the second planetary gear set are arranged in a housing.

[0019] As an implementation mode of the present invention, the generator and the drive motor both include a DC motor or an AC motor.

[0020] The beneficial effects of adopting the above technical solution are:

[0021] The hybrid power transmission mechanism fully ensures the speed required for the generator to generate electricity normally when the vehicle is working at high speed, avoids the problem of insufficient power generation when the general hybrid power system is working at high speed, and also solves the problem that the general hybrid power system cannot work under heavy load for a long time when the vehicle is reversing. It maximizes the use of the power of the engine and the low-speed and high-torque characteristics of the motor, reduces the mechanical structure of the gearbox, minimizes the failure rate of the transmission system, improves work efficiency, reduces fuel consumption, and reduces the workload of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of embodiment 1 of the present utility model.

[0023] Figure 2 It is a structural diagram of embodiment 2 of the present utility model.

[0024] Figure 3 yes Figure 2 A partial enlarged schematic diagram of point A in the middle.

[0025] Among them: 1 engine, 2 torsional vibration damper, 3 generator, 4 generator shaft, 5 first brake, 6 first sun gear, 7 first planetary carrier, 8 first ring gear, 9 drive motor, 10 drive motor shaft, 11 second brake, 12 second sun gear, 13 second planetary carrier, 14 second ring gear, 15 first planetary carrier input shaft, 16 engine power output shaft, 17 hollow shaft, 18 intermediate shaft sleeve, 19 support bearing. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described clearly and completely below in conjunction with specific embodiments.

[0027] Example 1:

[0028] like Figure 1 A hybrid power transmission mechanism is shown, comprising:

[0029] A first planetary carrier input shaft 15, one end of which is connected to the flywheel of the engine 1, and the other end is connected to the engine power output shaft 16;

[0030] A first planetary gear set includes a first sun gear 6, a first planet carrier 7, and a first ring gear 8. The first planet carrier 7 is fixedly connected to the first planet carrier input shaft 15. The first sun gear 6 is connected to the generator 3.

[0031] a second planetary gear set, comprising a second sun gear 12, a second planet carrier 13, and a second ring gear 14; wherein the second planet carrier 13 is fixedly connected to the first ring gear 8; and the second sun gear 12 is connected to the drive motor 9; both the generator 3 and the drive motor 9 are permanent magnet motors, and the permanent magnet motors are permanent magnet DC motors or permanent magnet AC motors;

[0032] a first brake 5 connected to a first ring gear 8;

[0033] The second brake 11 is connected to the second ring gear 14 .

[0034] In this embodiment, the generator shaft 4 of the generator 3 is rotatably coaxially sleeved outside the first planetary carrier input shaft 15, and the first sun gear 6 is fixedly connected to the generator shaft 4. The drive motor shaft 10 of the drive motor 9 is rotatably coaxially sleeved outside the engine power output shaft 16, and the second sun gear 12 is fixedly connected to the drive motor shaft 10.

[0035] Specifically, the first sun gear 6 is fixed to the generator shaft 4 through a spline, the second sun gear 12 is fixed to the drive motor shaft 10 through a spline, the first planetary carrier 7 is fixed to the first planetary carrier input shaft 15 through a spline, and the second planetary carrier is rotatably sleeved on the outside of the engine power output shaft 16.

[0036] The flywheel of the engine 1 is fixedly connected to the torsional vibration damper 2. The first planetary carrier input shaft 15 is splined to the torsional vibration damper 2. The engine power output shaft 16 is splined to the first planetary carrier input shaft 15. The first planetary gear set is disposed between the engine 1 and the second planetary gear set. The drive motor shaft 10 of the second planetary gear set is connected to the gearbox to drive the vehicle. The engine power output shaft 16 is connected to the PTO gearbox to output power to agricultural implements.

[0037] The first planetary gear set and the second planetary gear set are arranged in a housing, which reduces transmission components and reduces production costs.

[0038] Example 2:

[0039] like Figure 2 and Figure 3As shown, this embodiment differs from Example 1 in that the central portion of the first ring gear 8 is a hollow shaft 17 coaxially sleeved outside the first planetary carrier input shaft 15, and the second planetary carrier 13 is splined to the hollow shaft 17. A support bearing 19 is provided between the first ring gear 8 and the second planetary carrier 13, and an intermediate sleeve 18 is provided between the hollow shaft 17 and the first planetary carrier input shaft 15. Splitting the first ring gear 8 and the second planetary carrier 13 into two parts connected by a spline, and adding the support bearing 19 between them, facilitates production and assembly, and better ensures the positioning and stability of the transmission system.

[0040] Specific working process:

[0041] The power of the engine 1 is transmitted to the first planetary carrier input shaft 15 and the engine power output shaft 16 through the torsional vibration damper 2. The first planetary carrier input shaft 15 drives the first planetary carrier 7 to rotate, and the first planetary carrier 7 drives the generator shaft 4 to make the generator 3 generate electricity. When the first brake 5 brakes the first ring gear 8, the power of the engine 1 is only transmitted to the generator 3 for power generation; when the first brake 5 does not brake the first ring gear 8, the power is transmitted to the second sun gear 12 and the second ring gear 14 through the first ring gear 8 and the second planetary carrier 13. When the second brake 11 brakes the second ring gear 14, the power is transmitted to the drive motor shaft 10 through the second sun gear 12, so that power can be output to the wheels.

[0042] When the drive motor 9 needs to work alone and reverse (the vehicle moves backward), the first brake 5 brakes the first ring gear 8, and the second brake 11 cancels the brake on the second ring gear 14. At this time, the engine 1 only transmits power to the generator shaft 4 through the first planetary carrier 7 and the first sun gear 6, which is used for the generator 3 to generate electricity and store it, thereby ensuring the power consumption of the drive motor 9.

[0043] When the drive motor 9 rotates forward (the vehicle moves forward), as the power consumption of the drive motor 9 increases or decreases, the output power of the generator 3 will change accordingly, and the reverse resistance of the first sun gear 6 of the first planetary gear assembly will also change accordingly. At this time, the second brake 11 brakes the second ring gear 14, and the torque of the engine 1 will be transmitted to the drive motor shaft 10 through the first planetary carrier 7, the first ring gear 8, the second planetary carrier 13 and the second sun gear 12, providing auxiliary force for the power output of the drive motor 9, and the input speed will change with the speed of the drive motor 9.

[0044] When the vehicle needs to stop or needs to shift gears through the transmission, the first brake 5 brakes the first ring gear 8, cutting off the power transmission from the engine 1 to the drive motor 9, and the power of the engine 1 is only transmitted to the generator 3 for power generation.

[0045] When the motor fails, the first brake 5 cancels the braking of the first ring gear 8, and the second brake 11 brakes the second ring gear 14, transmitting the power of the engine 1 to the drive motor shaft 10 to drive the vehicle.

[0046] Through the aforementioned operating process, the hybrid power transmission mechanism fully ensures the required speed for generator 3 to generate electricity during high-speed operation, thus avoiding the problem of insufficient power generation at high speeds encountered by conventional hybrid power systems and resolving the problem of conventional hybrid power systems being unable to operate under heavy loads for extended periods during reverse. Furthermore, the hybrid power transmission mechanism maximizes the utilization of the engine's power and the motor's low-speed, high-torque characteristics, reduces the number of mechanical elements in the transmission, minimizes the occurrence of transmission system failures, improves operating efficiency, reduces fuel consumption, and alleviates the operator's workload.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid power transmission mechanism, characterized in that: It includes: A first planetary carrier input shaft, one end of which is connected to the flywheel of the engine, and the other end is connected to the power output shaft of the engine; a first planetary gear set comprising a first sun gear, a first planet carrier and a first ring gear, wherein the first planet carrier is fixedly connected to the first planet carrier input shaft, and the first sun gear is connected to the generator; a second planetary gear set comprising a second sun gear, a second planet carrier and a second ring gear, wherein the second planet carrier is fixedly connected to the first ring gear, and the second sun gear is connected to the drive motor; a first brake connected to the first ring gear; The second brake is connected to the second ring gear.

2. A hybrid power transmission mechanism according to claim 1, characterized in that: The generator shaft of the generator is rotatably and coaxially sleeved outside the first planetary carrier input shaft, and the first sun gear is fixedly connected to the generator shaft.

3. A hybrid power transmission mechanism according to claim 2, characterized in that: The drive motor shaft of the drive motor is rotatably and coaxially sleeved outside the engine power output shaft, and the second sun gear is fixedly connected to the drive motor shaft.

4. A hybrid power transmission mechanism according to claim 3, characterized in that: The first sun gear is fixed on the generator shaft through a spline, the second sun gear is fixed on the drive motor shaft through a spline, the first planet carrier is fixed on the first planet carrier input shaft through a spline, and the second planet carrier is rotatably sleeved on the outside of the engine power output shaft.

5. The hybrid power transmission mechanism according to claim 1, characterized in that: The middle part of the first gear ring is a hollow shaft coaxially sleeved outside the first planet carrier input shaft, and the second planet carrier is connected to the hollow shaft through a spline.

6. The hybrid power transmission mechanism according to claim 5, characterized in that: A support bearing is provided between the first ring gear and the second planet carrier; and an intermediate sleeve is provided between the hollow shaft and the input shaft of the first planet carrier.

7. A hybrid power transmission mechanism according to any one of claims 1 to 6, characterized in that: The flywheel of the engine is fixedly connected to the torsional vibration damper, the first planetary carrier input shaft is connected to the torsional vibration damper through a spline, and the engine power output shaft is connected to the first planetary carrier input shaft through a spline.

8. A hybrid power transmission mechanism according to any one of claims 1 to 6, characterized in that: The first planetary gear set is arranged between the engine and the second planetary gear set. The drive motor shaft of the second planetary gear set is connected to the gearbox to drive the vehicle. The engine power output shaft is connected to the PTO gearbox to output power to the agricultural implement.

9. The hybrid power transmission mechanism according to claim 8, characterized in that: The first planetary gear set and the second planetary gear set are arranged in a housing.

10. A hybrid power transmission mechanism according to any one of claims 1 to 6, characterized in that: The generator and the drive motor both include a DC motor or an AC motor.

Images