CN211525449U

CN211525449U - Parallel shaft type two-gear electric driving system

Info

Publication number: CN211525449U
Application number: CN201922205493.3U
Authority: CN
Inventors: 金辉辉
Original assignee: Getrag Jiangxi Transmission Co Ltd
Current assignee: Magna PT Powertrain Jiangxi Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-09-18
Anticipated expiration: 2029-12-11

Abstract

The utility model provides a parallel shaft type two keep off electric drive system, including driving motor, output shaft, single planetary mechanism, clutch, stopper, driving gear and differential mechanism, the one end of output shaft is connected and the other end is connected with single planetary mechanism's sun gear, the driving disc and the driven disc of stopper respectively with derailleur casing and single planetary mechanism's ring gear fixed connection, the driving disc and the driven disc of clutch respectively with single planetary mechanism's planet carrier and ring gear fixed connection, differential mechanism's main reducing gear can with install the transmission of the driving gear meshing on the planet carrier output shaft, differential mechanism and output shaft parallel arrangement. The utility model can realize two gears by controlling the closing of the clutch and the brake according to the working condition; meanwhile, the switching between the low-speed gear and the high-speed gear does not need power interruption and does not have gear shifting impact, and the driving comfort performance is better.

Description

Parallel shaft type two-gear electric driving system

Technical Field

The utility model relates to a pure electric vehicles electric drive technical field specifically is to relate to a parallel shaft type two keep off electric drive system.

Background

Electric vehicles on the market at present basically adopt a single-stage speed reducer with a fixed speed ratio, and although the single-stage speed reducer can basically meet the general driving requirements, the single-stage speed reducer cannot meet the requirements of low speed, large torque and high vehicle speed at the same time. To solve this problem, a driving motor with larger power or torque is usually used to satisfy both the high speed performance and the acceleration performance of the vehicle, such as a high performance model s P85D of a tesla electric vehicle, but the high efficiency region of the driving motor is often farther away from the operation region corresponding to the daily driving, i.e. the economical efficiency of the vehicle is reduced.

Although the two-gear speed reducer can simultaneously meet the high-speed performance and the acceleration performance of a vehicle in the market at present, the two-gear speed reducer has the problem of power interruption, so that the driving comfort is seriously influenced, and the two-gear speed reducer can only be matched with a pure electric commercial vehicle or a passenger car of a hybrid vehicle type and with low requirements on the driving comfort.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned prior art, the to-be-solved technical problem of the utility model lies in providing a shift power uninterrupted and the stronger parallel shaft type two keep off electric drive system of suitability.

For solving the technical problem, the utility model provides a parallel shaft type two keep off electric drive system, including driving motor, output shaft, single planetary mechanism, clutch, stopper, driving gear and differential mechanism, the one end and the driving motor of output shaft are connected and the other end is connected with single planetary mechanism's sun gear, the driving disk and the driven disk of stopper respectively with derailleur casing and single planetary mechanism's ring gear fixed connection, the driving disk and the driven disk of clutch respectively with single planetary mechanism's planet carrier and ring gear fixed connection, differential mechanism's owner subtracts the gear can with install the driving gear meshing transmission on planet carrier output shaft, differential mechanism and output shaft parallel arrangement.

Preferably, the gear transmission device further comprises an intermediate shaft and a duplicate gear arranged on the intermediate shaft, wherein a large gear and a small gear of the duplicate gear can be respectively meshed with the driving gear and the main reducing gear for transmission.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the single-row planetary mechanism is connected with the brake and the clutch simultaneously, so that two gears can be realized by controlling the closing of the clutch and the brake according to working conditions, namely, the starting gear and the low gear adopt a large speed ratio to realize large torque output and enable the starting performance and the acceleration performance to be better, and the high gear adopts a small speed ratio to generate a higher maximum speed; meanwhile, the switching between the low-speed gear and the high-speed gear does not need power interruption and does not have gear shifting impact, and the driving comfort performance is better.

2. Through setting up single planetary mechanism, can make the speed ratio control range of low-speed gear and high-speed gear bigger like this to can satisfy different customers' demand, if can match pure electric passenger car and pure electric commercial car.

3. By arranging the duplicate gear between the single-row planetary mechanism and the differential mechanism, the speed ratio adjusting range of a low gear and a high gear can be enlarged, and larger torque can be output, so that the output torque of the driving motor and the size, weight and cost of the driving motor can be reduced.

Drawings

Fig. 1 is a schematic structural diagram of a parallel shaft type two-gear electric drive system according to the present invention.

Fig. 2 is a power transmission path diagram of the present invention.

Fig. 3 is a diagram of the second-gear power transmission path of the present invention.

Illustration of the drawings: 1-driving motor, 2-output shaft, 3-sun gear, 4-planet gear, 5-planet carrier, 6-gear ring, 7-brake driving disc, 8-clutch driving disc, 9-driving gear, 10-duplicate gear, 11-intermediate shaft, 12-main reduction gear, 13-right half shaft and 14-left half shaft.

Detailed Description

The invention will be further described with reference to the drawings and preferred embodiments.

Fig. 1 shows a schematic structural diagram of a parallel shaft type two-gear electric drive system of the present invention, which includes a driving motor 1, an output shaft 2, a single-row planetary mechanism, a clutch, a brake, a driving gear 9, a duplicate gear 10, an intermediate shaft 11 and a differential mechanism.

One end of the output shaft 2 is connected with the driving motor 1, and the other end is connected with the sun gear 3 of the single-row planetary mechanism through a spline. A plurality of planet wheels 4 are evenly distributed on a planet carrier 5 of the single-row planetary mechanism in the circumferential direction, and the planet wheels 4 can be in external meshing transmission with the sun wheel 3. One end of a ring gear 6 of the single-row planetary mechanism can be in internal gearing with the plurality of planetary wheels 4, and the other end of the ring gear 6 is respectively welded with a clutch driven disc (not shown in the figure) and a brake driven disc (not shown in the figure). A brake driving disk 7 is fixedly mounted at a corresponding position on the transmission housing, which brake driving disk 7 can be engaged with a brake driven disk to block the ring gear 6. A clutch driving disk 8 is welded at a corresponding position of the planet carrier 5, and the clutch driving disk 8 can be engaged with a clutch driven disk to lock the planet carrier 5 and the ring gear 6. A driving gear 9 is arranged on one end of the planet carrier 5 far away from the driving motor 1 through a spline, the driving gear 9 can be meshed with a large gear of a duplicate gear 10 arranged on an intermediate shaft 11 for transmission, a small gear of the duplicate gear 10 can be meshed with a main reduction gear 12 in a differential for transmission, and the differential is arranged in parallel with the output shaft 2.

The working principle of the utility model is as follows:

low-speed gear: the power transmission path is shown in fig. 2. When the whole vehicle starts, the vehicle is started by using a low-speed gear, and after the vehicle starts, the vehicle is driven by using the low-speed gear until a certain set vehicle speed (the set vehicle speed is assumed to be 80 km/h). At the moment, the clutch driving disc 8 is separated from the clutch driven disc, the brake driving disc 7 is connected with the brake driven disc, the gear ring 6 is locked, the power of the driving motor 1 is transmitted to the planet carrier 5 through the output shaft 2, the sun gear 3 and the planet gear 4, then the power is transmitted to the differential through the driving gear 9, the duplicate gear 10 and the main reduction gear 12, and finally the power is transmitted to the wheels through the left half shaft 13 and the right half shaft 14 which are connected with the differential.

High-speed gear: the power transmission path is shown in fig. 3. When the vehicle speed reaches the set high-speed working condition, the system is switched from the low-speed working condition to the high-speed working condition (the set gear-shifting vehicle speed is assumed to be 80 km/h). At this time, the clutch driving disc 8 is engaged with the clutch driven disc, the brake driving disc 7 is disengaged from the brake driven disc, the ring gear 6 and the planet carrier 5 are locked, the single-row planetary mechanism integrally rotates, the power of the driving motor 1 is integrally output through the single-row planetary mechanism, then the power is transmitted to the differential through the driving gear 9, the duplicate gear 10 and the main reduction gear 12, and finally the power is transmitted to the wheels through the left half shaft 13 and the right half shaft 14 connected with the differential.

Reversing gear: the power transmission path is like a low gear, and only the motor 1 needs to be driven to rotate reversely.

The foregoing merely illustrates preferred embodiments of the present invention, which are described in considerable detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, modifications and substitutions can be made, which are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A parallel shaft type two-gear electric drive system is characterized in that: including driving motor (1), output shaft (2), single planetary mechanism, clutch, stopper, driving gear (9) and differential mechanism, the one end and the driving motor (1) of output shaft (2) are connected and the other end is connected with sun gear (3) of single planetary mechanism, the driving disk and the driven disk of stopper respectively with derailleur casing and single planetary mechanism's ring gear (7) fixed connection, the driving disk and the driven disk of clutch respectively with single planetary mechanism's planet carrier (5) and ring gear (7) fixed connection, differential mechanism's owner subtracts gear (12) can with install driving gear (9) meshing transmission on planet carrier (5) output shaft, differential mechanism and output shaft (2) parallel arrangement.

2. A parallel shaft two speed electric drive system according to claim 1 wherein: the transmission mechanism further comprises an intermediate shaft (11) and a duplicate gear (10) arranged on the intermediate shaft (11), wherein a large gear and a small gear of the duplicate gear (10) can be respectively in meshing transmission with the driving gear (9) and the main reduction gear (12).