Coaxial dual-motor power dividing hybrid power system with dual power output

Abstract

The utility model relates to a coaxial dual-motor power dividing hybrid power system with dual power output. The power generation motor planet carrier is in hard connection with an engine input shaft, the power generation motor sun gear and the power generation motor inner gear ring are in meshed connection with gears on the two sides of the power generation motor planet carrier respectively, the gear ring is in hard connection with the power generation motor inner gear ring, and the driving motor inner gear ring is in hard connection with the gear ring. The driving motor planet carrier is in gear meshing connection with the driving motor inner gear ring, the driving motor sun gear is in gear meshing connection with the driving motor planet carrier, a first power output shaft is further arranged on the gear ring, and a second power output shaft coaxial with the engine input shaft is arranged on the power generation motor planet carrier. The power generation motor sun gear is in hard connection with the power generation motor, the driving motor sun gear is in hard connection with the driving motor, the power generation motor, the driving motor, the two planet carriers and the engine are coaxially arranged, and the planetary gear set and the power output shaft are reasonably arranged, so that the working mode of dual-power output is increased.

Description

Technical Field

[0001] The utility model relates to a vehicle transmission, in particular to a coaxial dual-motor power split hybrid system with dual power output. Background Art

[0002] Chinese Patent CN202422704399.3, Name: A coaxial dual-motor power split hybrid system structure, whose main structure includes: a wheel power output shaft, an engine input shaft, a GM motor, a TM drive motor, a GM motor sun gear, a GM motor planetary gear, a TM motor sun gear, a TM motor planetary gear and a ring gear; the engine input shaft is connected to the GM motor planetary gear through a planet carrier, one end of the GM motor planetary gear is meshed with the ring gear, the other end of the GM motor planetary gear is meshed with the GM motor sun gear, and the GM motor sun gear is connected to the GM motor through the GM motor shaft; the TM drive motor is connected to the TM motor sun gear through the TM motor shaft, the TM motor sun gear is meshed with one end of the TM motor planetary gear, and the other end of the TM motor planetary gear is meshed with the ring gear; the ring gear is connected to the wheel power output shaft. Although this structure can achieve continuously variable speed, it only has a single power output shaft. For some special-purpose vehicles that require dual power output (such as tractors), the power system needs to have two independent power output sources. The existing technology is not applicable and cannot meet the usage requirements. Utility Model Content

[0003] The purpose of the utility model is to solve the defects of the prior art and design a coaxial dual-motor power split hybrid system with dual power output. By reasonably arranging the planetary gear set and setting a second power output shaft, the vehicle adds a dual power output working mode of the engine and the drive motor, thereby improving the output power.

[0004] The utility model is implemented as follows: a coaxial dual-motor power split hybrid system with dual power output, characterized in that: it includes, in sequence, a generator motor planetary carrier hard-linked to the engine input shaft, a generator motor sun gear and a generator motor inner ring gear respectively meshed with gears on both sides of the generator motor planetary carrier, a ring gear hard-connected to the generator motor inner ring gear, a drive motor inner ring gear hard-connected to the ring gear, a drive motor planetary carrier meshed with the drive motor inner ring gear gear, and a drive motor sun gear meshed with the drive motor planetary carrier gear, a first power output shaft is hard-connected to the ring gear, a second power output shaft coaxially arranged with the engine input shaft is hard-connected to the generator motor planetary carrier, wherein the generator motor sun gear is hard-connected to the generator motor, and the drive motor sun gear is hard-connected to the drive motor.

[0005] The inner gear ring of the driving motor is arranged on the same side of the inner gear ring of the generator motor and is rigidly connected to the gear ring. The generator motor, the driving motor, the two planet carriers and the engine are arranged coaxially.

[0006] The first power output shaft and the second power output shaft are respectively rigidly connected to the gearbox of the whole vehicle, and the planetary carrier of the driving motor is fixedly connected to the housing of the gearbox of the whole vehicle.

[0007] The power output path of the power-split hybrid system in the pure electric working mode is as follows: the drive motor works and transmits power to the drive motor planetary carrier, the drive motor inner gear ring, the gear ring and the first power output shaft in sequence through the drive motor sun gear.

[0008] The power output path of the power-split hybrid system in the in-situ range-extending mode is as follows: the engine power drives the planetary carrier and the sun gear of the generator motor in sequence through the engine input shaft, and then drives the generator motor to generate electricity.

[0009] The power output path of the power-split hybrid system in hybrid mode is as follows: the engine power drives the generator motor planetary carrier, the generator motor sun gear, the generator motor inner gear ring, the gear ring and the first power output shaft in sequence through the engine input shaft; at the same time, the drive motor works and transmits power to the drive motor planetary carrier, the drive motor inner gear ring, the gear ring and the first power output shaft in sequence through the drive motor sun gear; in this state, the generator motor is in a power generation state.

[0010] The power output path of the power-split hybrid system in the energy recovery mode is as follows: during braking, the kinetic energy of the entire vehicle is transmitted to the ring gear, the inner ring gear of the drive motor, the planetary carrier of the drive motor and the sun gear of the drive motor in sequence through the first power output shaft.

[0011] Dual power output mode: When the power split hybrid system is in the working mode of in-situ range extension, hybrid, and energy recovery, the second power output shaft can also output power at the same time. When the second power output shaft needs to adjust the speed, the control system can control the engine speed alone. The output speed and torque of the second power output shaft will not change due to the changes in the output speed and torque of the first power output shaft.

[0012] The beneficial effect of the present invention is as follows: for vehicle models that require dual power output, the present invention adds a second power output shaft coaxial with the engine input shaft for power output, so that the power-split hybrid system has a dual power output mode. When the power-split hybrid system is in the in-situ range extension, hybrid, and energy recovery working modes, the second power output shaft can also output power, and the engine speed can be independently controlled by the control system to adjust the speed of the second power output shaft. Therefore, the second power output shaft has the performance of independent output speed adjustment, which is convenient for matching and connecting the corresponding power of the whole vehicle, meets the power characteristics requirements of special vehicle operations, and meets market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] In the figure: 1. engine input shaft; 2. generator motor; 3. generator motor sun gear; 4. generator motor planetary carrier; 5. generator motor inner ring gear; 6. ring gear; 7. drive motor inner ring gear; 8. drive motor planetary carrier; 9. drive motor sun gear; 10. drive motor; 11. first power output shaft; 12. second power output shaft. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] According to the attached Figure 1 The utility model is a coaxial dual-motor power split hybrid system with dual power output, which sequentially comprises a generator motor planetary carrier 4 hard-linked to an engine input shaft 1, a generator motor sun gear 3 and a generator motor inner gear ring 5 respectively meshing with gears on both sides of the generator motor planetary carrier 4, a gear ring 6 hard-connected to the generator motor inner gear ring 5, a drive motor inner gear ring 7 provided on the same side of the generator motor inner gear ring 5 and hard-connected to the gear ring 6, a drive motor planetary carrier 8 meshing with gears of the drive motor inner gear ring 7, and a drive motor sun gear 9 meshing with gears of the drive motor planetary carrier 8. A first power output shaft 11 is rigidly connected to the ring gear 6, a second power output shaft 12 coaxially arranged with the engine input shaft 1 is rigidly connected to the generator motor planetary carrier 4, and the first power output shaft 11 and the second power output shaft 12 are rigidly connected to the vehicle gearbox respectively, and the drive motor planetary carrier 8 is fixedly connected to the vehicle gearbox housing, wherein the generator motor sun gear 3 is rigidly connected to the generator motor 2 (GM motor), and the drive motor sun gear 9 is rigidly connected to the drive motor 10 (TM motor), and the generator motor, the drive motor, the two planetary carriers and the engine are coaxially arranged.

[0017] The working modes of the utility model are divided into: pure electric, on-site range extension, hybrid, energy recovery and dual power output working modes.

[0018] Pure electric working mode: the drive motor 10 works and transmits power to the drive motor planetary carrier 8, the drive motor inner ring gear 7, the ring gear 6, and the first power output shaft 11 in sequence through the drive motor sun gear 9.

[0019] In-situ range extension mode: The engine power drives the generator motor planetary carrier 4 and the generator motor sun gear 3 in sequence through the engine input shaft 1, thereby driving the generator motor 2 to generate electricity.

[0020] Hybrid mode: the engine power drives the generator motor planetary carrier 4 through the engine input shaft 1, and the generator motor planetary carrier 4 is simultaneously transmitted to the generator motor sun gear 3 and the generator motor inner ring gear 5, and then the generator motor inner ring gear 5 is sequentially transmitted to the ring gear 6 and the first power output shaft 11; at the same time, the drive motor 10 works and transmits power to the drive motor planetary carrier 8, the drive motor inner ring gear 7, the ring gear 6, and the first power output shaft 11 in sequence through the drive motor sun gear 9; in this state, the generator motor 2 is in power generation, and the generated electric energy is consumed by the drive motor 10 to balance the power of the high-voltage battery of the whole vehicle. When the power is high, the drive motor 10 can consume more power, and when the power is low, the drive motor 10 can consume less power.

[0021] Energy recovery mode: When the vehicle needs to brake during operation, the kinetic energy of the vehicle is transmitted to the ring gear 6, the inner ring gear 7 of the drive motor, the planetary carrier 8 of the drive motor, and the sun gear 9 of the drive motor in sequence through the first power output shaft 11. At this time, the drive motor converts the kinetic energy of the vehicle into electrical energy and stores it in the high-voltage battery pack of the vehicle. At this time, the engine and the generator motor 2 can determine whether to generate electricity according to the power of the high-voltage battery pack of the vehicle. When the power is high, no power will be generated, and when the power is low, power can be generated.

[0022] Dual power output mode: When the above-mentioned in-situ range extension, hybrid and energy recovery are working, the second power output shaft 12 can also output power. When the second power output shaft 12 needs to adjust the speed, the engine speed can be controlled independently by the vehicle control system. The output speed and torque of the second power output shaft 12 will not change due to changes in the output speed and torque of the first power output shaft 11.

[0023] The hybrid working principle of the utility model is as follows: part of the energy of the engine is directly output to the wheels through the planetary gears, and part of the energy is generated by the generator motor. The energy generated by the generator motor is output to the wheels through the drive motor, thereby realizing power transmission.

Claims

1. A coaxial dual-motor power split hybrid system with dual power output, characterized in that: It includes, in sequence, a generator motor planetary carrier hard-linked to the engine input shaft, a generator motor sun gear and a generator motor inner ring gear respectively meshed with gears on both sides of the generator motor planetary carrier, a ring gear hard-linked to the generator motor inner ring gear, a drive motor inner ring gear hard-linked to the ring gear, a drive motor planetary carrier meshed with the drive motor inner ring gear gear, and a drive motor sun gear meshed with the drive motor planetary carrier gear, wherein a first power output shaft is hard-linked to the ring gear, and a second power output shaft coaxially arranged with the engine input shaft is hard-linked to the generator motor planetary carrier, wherein the generator motor sun gear is hard-linked to the generator motor, the drive motor sun gear is hard-linked to the drive motor, and the drive motor planetary carrier is fixedly connected to the gearbox housing of the vehicle.

2. The coaxial dual-motor power split hybrid system with dual power output according to claim 1, characterized in that: The inner gear ring of the driving motor is arranged on the same side of the inner gear ring of the generator motor and is rigidly connected to the gear ring. The generator motor, the driving motor, the two planet carriers and the engine are arranged coaxially.

3. The coaxial dual-motor power split hybrid system with dual power output according to claim 1, characterized in that: The first power output shaft and the second power output shaft are respectively hard-connected to the gearbox of the vehicle.

4. A coaxial dual-motor power split hybrid system with dual power output according to any one of claims 1 to 3, characterized in that The power output path of the power-split hybrid system in the pure electric working mode is as follows: the drive motor works and transmits power to the drive motor planetary carrier, the drive motor inner gear ring, the gear ring and the first power output shaft in sequence through the drive motor sun gear.

5. A coaxial dual-motor power split hybrid system with dual power output according to any one of claims 1 to 3, characterized in that The power output path of the power-split hybrid system in the in-situ range-extending mode is as follows: the engine power drives the planetary carrier and the sun gear of the generator motor in sequence through the engine input shaft, and then drives the generator motor to generate electricity.

6. A coaxial dual-motor power split hybrid system with dual power output according to any one of claims 1 to 3, characterized in that The power output path of the power-split hybrid system in the hybrid mode is as follows: the engine power is transmitted to the generator motor planetary carrier through the engine input shaft, and is simultaneously transmitted from the generator motor planetary carrier to the generator motor sun gear and the generator motor inner ring gear, and then is transmitted from the generator motor inner ring gear to the ring gear and the first power output shaft in sequence. At the same time, the drive motor works and transmits power to the drive motor planetary carrier, the drive motor inner ring gear, the ring gear and the first power output shaft in sequence through the drive motor sun gear. In this state, the generator motor is in a power generation state.

7. A coaxial dual-motor power split hybrid system with dual power output according to any one of claims 1 to 3, characterized in that The power output path of the power-split hybrid system in the energy recovery mode is as follows: during braking, the kinetic energy of the entire vehicle is transmitted to the ring gear, the inner ring gear of the drive motor, the planetary carrier of the drive motor and the sun gear of the drive motor in sequence through the first power output shaft.

8. A coaxial dual-motor power split hybrid system with dual power output according to claim 1 or 3, characterized in that: The working power of the second power output shaft comes from the engine, and the vehicle control system independently controls the engine speed to adjust the working state of the second power output shaft.

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