CN214564583U

CN214564583U - Rear-drive electric drive transmission device

Info

Publication number: CN214564583U
Application number: CN202120763602.8U
Authority: CN
Inventors: 韩兵; 张天锷
Original assignee: Shanghai Synetec Power System Co ltd
Current assignee: Shanghai Synetec Power System Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2021-11-02
Anticipated expiration: 2031-04-15

Abstract

The utility model discloses a rear-guard electric drive transmission, including planetary gear power split mechanism, the primary shaft, first rotor shaft and second rotor shaft, planetary gear power split mechanism include the first sun gear with the primary shaft is connected, the second sun gear, the planet carrier with first rotor shaft is connected, rotatable set up on the planet carrier and with first sun gear engaged with first planetary gear and with second sun gear engaged with and with first planetary gear synchronous revolution's second planetary gear, the second sun gear is connected with the secondary shaft, second rotor shaft sleeve locates on the secondary shaft. The utility model discloses a back-drive electric drive transmission adopts planetary gear mechanism as power coupling mechanism, realizes energy-efficient power split operating mode, and the rational arrangement through motor and planetary gear mechanism realizes carrying on the use of back-drive vehicle, and the effect of economizing on fuel is obvious, can reduce the whole car oil consumption of back-drive vehicle.

Description

Rear-drive electric drive transmission device

Technical Field

The utility model belongs to the technical field of vehicle power transmission, specifically speaking, the utility model relates to a rear-guard electric drive transmission.

Background

The motorization of the automobile power system becomes a development trend, and the hybrid power system has the advantages of mature technology, low product cost and the like, is produced in large scale and becomes an important energy-saving technical route at the present stage. The power split hybrid power system with double motors can realize the optimization of the working range of the engine and reduce the oil consumption of the whole vehicle; the technical route is represented by THS hybrid power products of Toyota automobile company and is successful in the market.

The conventional hybrid power transmission device on the rear-drive vehicle is a planetary power coupling mechanism containing a planetary row inner gear ring, and cannot realize a power split driving mode, so that the fuel consumption of the whole vehicle is high, the product cost is high, and the production and manufacturing difficulty is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a rear-guard electric drive transmission, the whole car oil consumption of rear-guard vehicle is reduced to the purpose.

In order to realize the purpose, the utility model discloses the technical scheme who takes does: a rear-drive electric drive transmission device comprises a planetary gear power splitting mechanism, a first shaft, a first rotor shaft and a second rotor shaft, wherein the first shaft is used for receiving power from an engine, the first rotor shaft is connected with a rotor of a generator, the second rotor shaft is connected with the rotor of the drive motor, the planetary gear power splitting mechanism is located between the drive motor and the generator, the planetary gear power splitting mechanism comprises a first sun gear, a second sun gear, a planet carrier, a first planet gear and a second planet gear, the first sun gear is connected with the first rotor shaft, the first planet gear is rotatably arranged on the planet carrier and meshed with the first sun gear, the second planet gear is meshed with the second sun gear and rotates synchronously with the first planet gear, the second sun gear is connected with a second shaft, and the second rotor shaft is sleeved on the second shaft.

The second shaft is provided with a first reduction gear, the second rotor shaft is provided with a second reduction gear, the first reduction gear is meshed with a third reduction gear, the second reduction gear is meshed with a fourth reduction gear, and the third reduction gear and the fourth reduction gear are fixedly installed on the connecting shaft.

The drive motor is located between the second reduction gear and the planet carrier.

The first reduction gear and the second reduction gear are located between the carrier and the drive motor.

The utility model discloses a rear-guard electric drive transmission adopts planetary gear mechanism as power coupling mechanism, realizes the power split mode of high-efficient energy-conserving, realizes carrying the use of rear-guard vehicle through the rational arrangement of motor and planetary gear mechanism, and the effect of economizing on fuel is obvious, can reduce the whole car oil consumption of rear-guard vehicle; and the transmission device adopts a planetary power coupling mechanism, all gear elements adopt cylindrical outer gears, the use of inner gear rings is avoided, and the transmission device has the characteristics of novel structure, easiness in processing and manufacturing and the like.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a schematic structural view of a rear drive electric drive transmission of an embodiment;

FIG. 2 is a schematic structural view of a rear drive electric drive transmission according to a second embodiment;

labeled as: 1. a first shaft; 2. a second shaft; 3. a first sun gear; 4. a second sun gear; 5. a first planetary gear; 6. a second planetary gear; 7. a planet carrier; 8. a first rotor shaft; 10. a fourth reduction gear; 11. a third reduction gear; 12. a first reduction gear; 13. a connecting shaft; 14. a second reduction gear; 16. a rotor of a generator; 17. a stator of the generator; 18. a rotor of the drive motor; 19. a stator of the driving motor; 22. a second rotor shaft.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation.

It should be noted that, in the following embodiments, the terms "first", "second", "third" and "fourth" do not represent absolute differences in structure and/or function, nor represent a sequential execution order, but merely for convenience of description.

Example one

As shown in fig. 1, the present embodiment provides a rear drive electric drive transmission comprising a planetary gear power split mechanism, a first shaft 1 for receiving power from an engine, a first rotor shaft 8 connected to a rotor 16 of a generator, and a second rotor shaft 22 connected to a rotor 18 of a drive motor, the planetary gear power split mechanism being located between the drive motor and the generator, the planetary gear power split mechanism comprising a first sun gear 3 connected to the first shaft 1, the second sun gear 4, the planet carrier 7 connected with the first rotor shaft 8, the first planetary gear 5 which is rotatably arranged on the planet carrier 7 and is meshed with the first sun gear 3, and the second planetary gear 6 which is meshed with the second sun gear 4 and synchronously rotates with the first planetary gear 5, the second sun gear 4 is connected with the second shaft 2, and the second rotor shaft 22 is sleeved on the second shaft 2.

Specifically, as shown in fig. 1, the first planetary gear 5 and the second planetary gear 6 are cylindrical gears, and the first planetary gear 5 and the second planetary gear 6 are fixedly connected together to constitute a stepped planetary gear set that is provided in plurality and all of which are arranged in the circumferential direction on the carrier 7 and can rotate on the carrier 7 and revolve around the first sun gear 3 and the second sun gear 4. The first sun gear 3 is directly connected with the first shaft 1, a rotor 16 of the generator is fixedly connected with the first rotor shaft 8, the planet carrier 7 is fixedly connected with the first rotor shaft 8, the second sun gear 4 is fixedly connected with the second shaft 2, the first shaft 1 serves as an input shaft of the transmission device, the second shaft 2 serves as an output shaft of the transmission device, the first shaft 1 is connected with the engine, the first rotor shaft 8 is a hollow shaft, the first shaft 1 penetrates through the first rotor shaft 8, the first shaft 1 and the first rotor shaft 8 are coaxially arranged, and the length of the first rotor shaft 8 is smaller than that of the first shaft 1. The second shaft 2 is used as an output shaft of the planetary gear power splitting mechanism, the second rotor shaft 22 is a hollow shaft, the second shaft 2 penetrates through the second rotor shaft 22, the second shaft 2 and the second rotor shaft 22 are coaxially arranged, the first shaft 1 and the second shaft 2 are coaxially arranged, and the length of the second shaft 2 is larger than that of the second rotor shaft 22.

As shown in fig. 1, a first reduction gear 12 is disposed on the second shaft 2, a second reduction gear 14 is disposed on the second rotor shaft 22, the first reduction gear 12 is engaged with a third reduction gear 11, the second reduction gear 14 is engaged with a fourth reduction gear 10, the third reduction gear 11 and the fourth reduction gear 10 are fixedly mounted on a connecting shaft 13, the connecting shaft 13 is parallel to the second shaft 2, and the third reduction gear 11 and the fourth reduction gear 10 rotate synchronously. The drive motor is located between the second reduction gear 14 and the planet carrier 7. The second reduction gear 14 is located between the drive motor and the first reduction gear 12. The planet carrier 7 is located between the drive motor and the generator, which is located between the engine and the planet carrier 7.

The torque output by the driving motor is transmitted to the second shaft 2 through the second reduction gear 14, the fourth reduction gear 10, the third reduction gear 11 and the first reduction gear 12 in sequence, and then the vehicle is driven to run through a main speed reducer of a vehicle chassis. The stator 17 of the generator and the stator 19 of the drive motor are fixed to the housing of the transmission. When the parts are arranged, a second reduction gear 14, a fourth reduction gear 10, a third reduction gear 11 and a first reduction gear 12 of the driving motor are arranged between the driving motor and the output end of the second shaft 2, and the output end of the second shaft 2 is provided with a flange plate connected with a main reducer.

When the pure electric drive is carried out, the driving motor is adopted to drive the vehicle independently, and the vehicle is driven in a fixed speed ratio mode. The power transmission path generated by the driving motor is from the second reduction gear 14, the fourth reduction gear 10, the third reduction gear 11, the first reduction gear 12 to the second shaft 2.

During hybrid power driving, the first shaft 1 is directly connected with an engine, the engine is directly started by adopting a generator, and at the moment, a power system runs in a power splitting mode. According to the rotating speed characteristic of the planetary gear train mechanism, the rotating speed of the engine can be kept unchanged, the vehicle speed of the whole vehicle is changed through the rotating speed control of the generator and the driving motor, namely the rotating speed of the engine can work in a low-oil-consumption interval without being influenced by the vehicle speed, and the energy-saving purpose is achieved. The function of realizing the stepless speed regulation of the whole vehicle by controlling the rotating speed of the motor is called as an electronic stepless speed change function, namely an E-CVT function, and the function is also an obvious scheme advantage of a power splitting system.

When the pure electric vehicle enters a hybrid power mode, the engine is directly dragged to an ignition rotating speed by the generator, and the ignition process of the engine is completed. The first shaft 1, the first rotor shaft 8 and the second shaft 2 form a three-shaft transmission system, and the speed characteristic relation of a typical planet row is satisfied, namely the speed of the third element can be determined by the speeds of two elements. Therefore, the planetary gear mechanism can be used as a power coupling mechanism to realize power coupling among the engine, the generator and the power output. The generator operates in a positive rotational speed negative torque state, obtains power from the engine and converts the power into electrical energy for use by the drive motor or for storage in the battery. The generator enables the engine to work in a low oil consumption region through self rotating speed adjustment, so that the engine is prevented from being influenced by the running working condition.

Example two

As shown in fig. 2, the present embodiment provides a rear drive electric drive transmission device, which operates on the same principle and is connected in the same manner as the first embodiment. The present embodiment is different from the first embodiment in that the arrangement of the drive motor and the reduction gear is different from that of the first embodiment.

As shown in fig. 2, in the present embodiment, the first reduction gear 12 and the second reduction gear 14 are located between the carrier 7 and the drive motor, and the first reduction gear 12 is located between the carrier 7 and the second reduction gear 14. The carrier 7 is located between the first reduction gear 12 and the generator, which is located between the engine and the carrier 7.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.

Claims

1. A rear drive electric drive transmission comprising a planetary gear power split mechanism, a first shaft for receiving power from an engine, a first rotor shaft connected to a rotor of a generator, and a second rotor shaft connected to a rotor of a drive motor, the planetary gear power split mechanism being located between the drive motor and the generator, characterized in that: planetary gear power split mechanism include with first sun gear, second sun gear of primary shaft connection, with planet carrier, rotatable setting on the planet carrier and with first sun gear engaged with first planetary gear and with second sun gear engaged with and with first planetary gear synchronous revolution's second planetary gear, the second sun gear is connected with the secondary shaft, the second rotor shaft sleeve is located on the secondary shaft.

2. A rear drive electric drive transmission as set forth in claim 1, wherein: the second shaft is provided with a first reduction gear, the second rotor shaft is provided with a second reduction gear, the first reduction gear is meshed with a third reduction gear, the second reduction gear is meshed with a fourth reduction gear, and the third reduction gear and the fourth reduction gear are fixedly installed on the connecting shaft.

3. A rear drive electric drive transmission as set forth in claim 2, wherein: the drive motor is located between the second reduction gear and the planet carrier.

4. A rear drive electric drive transmission as set forth in claim 2, wherein: the first reduction gear and the second reduction gear are located between the carrier and the drive motor.