Electric device with torque vectoring function

Patent metadata

Field	Value
Publication number	US-10655719-B2
Application number	US-201815959220-A
Country	US
Kind code	B2
Filing date	Apr 21, 2018
Priority date	Apr 21, 2017
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

Disclosed is an electric differential with a torque vectoring function. The electric differential includes: a main drive mechanism; a bevel gear differential; a TV control drive mechanism used for outputting control power; a first single-row planetary gear train, of which a first sun gear is coaxially and fixedly connected with a first half shaft and a first gear ring is connected with a control output end; a second single-row planetary gear train, of which a second gear ring is fixed to a drive axle housing, a second planet carrier is fixedly connected with a first planet carrier and a second sun gear is supported on the first half shaft through a bearing.

First claim

We claim:

1. An electric differential with a torque vectoring function, comprising:
a main drive mechanism arranged on one side of a differential, wherein an output end of the main drive mechanism is connected with a differential housing for transferring rotating power to the differential housing to drive a vehicle to run;
a TV control drive mechanism arranged on the other side of the differential for outputting torque vectoring control power;
a first single-row planetary gear train including a first sun gear, a first planetary gear, a first planet carrier and a first gear ring, wherein the first sun gear is coaxially and fixedly connected with a first half shaft, and the first gear ring is connected with an output end of the TV control drive mechanism;
a second single-row planetary gear train including a second sun gear, a second planetary gear, a second planet carrier and a second gear ring, wherein the second gear ring is fixed to a drive axle housing, the second planet carrier is fixedly connected with the first planet carrier, and the second sun gear is rotatably supported on the first half shaft; and
a third single-row planetary gear train including a third sun gear, a third planetary gear, a third planet carrier and a third gear ring, wherein the third sun gear is coaxially and fixedly connected with the first half shaft, the third gear ring is fixedly connected with the second sun gear, and the third planet carrier is fixedly connected with the differential housing, wherein
the second single-row planetary gear train and the first single-row planetary gear train have a same diameter.

2. The electric differential with a torque vectoring function according to claim 1 , wherein the TV control drive mechanism comprises a TV control motor and a TV reducing mechanism.

3. The electric differential with a torque vectoring function according to claim 2 , wherein the TV control motor comprises a hollow output shaft; and the first half shaft is rotatably supported on the hollow output shaft and penetrates out of the hollow output shaft.

4. The electric differential with a torque vectoring function according to claim 2 , wherein TV reducing mechanism comprises:
a fourth single-row planetary gear train including a fourth sun gear, a fourth planetary gear, a fourth planet carrier and a fourth gear ring, wherein the fourth sun gear is fixedly connected with the hollow output shaft, and the fourth gear ring is fixed to the drive axle housing; and
a fifth single-row planetary gear train including a fifth sun gear, a fifth planetary gear, a fifth planet carrier and a fifth gear ring, wherein the fifth sun gear is fixedly connected with the fourth planet carrier, the fifth gear ring is fixed to the drive axle housing, and the fifth planet carrier is a control output end that is connected with the first gear ring.

5. The electric differential with a torque vectoring function according to claim 1 , wherein the main drive mechanism comprises a main drive motor and a main reducing mechanism.

6. The electric differential with a torque vectoring function according to claim 5 , wherein the main drive motor comprises a hollow output shaft; and a second half shaft is rotatably supported on the hollow output shaft and penetrates out of the hollow output shaft.

7. The electric differential with a torque vectoring function according to claim 5 , wherein the main reducing mechanism comprises:
a seventh single-row planetary gear train including a seventh sun gear, a seventh planetary gear, a seventh planet carrier and a seventh gear ring, wherein the seventh sun gear is fixedly connected with an output shaft of the main drive motor, and the seventh gear ring is fixed to the drive axle housing; and
a sixth single-row planetary gear train including a sixth sun gear, a sixth planetary gear, a sixth planet carrier and a sixth gear ring, wherein the sixth sun gear is fixedly connected with the seventh planet carrier, the sixth gear ring is fixed to the drive axle housing, and the sixth planet carrier is fixedly connected with the differential housing.

8. An electric differential with a torque vectoring function, comprising:
a main drive mechanism arranged on one side of a differential, wherein an output end of the main drive mechanism is connected with a differential housing for transferring rotating power to the differential housing to drive a vehicle to run;
a TV control drive mechanism arranged on the other side of the differential for outputting torque vectoring control power;
a first single-row two-stage planetary gear train including a first sun gear, a first two-stage planetary gear, a first planet carrier and a first gear ring, wherein the first sun gear is coaxially and fixedly connected with a first half shaft, and the first gear ring is connected with an output end of the TV control drive mechanism;
a second single-row two-stage planetary gear train including a second sun gear, a second two-stage planetary gear, a second planet carrier and a second gear ring, wherein the second gear ring is fixed to a drive axle housing, the second planet carrier is fixedly connected with the first planet carrier, and the second sun gear is rotatably supported on the first half shaft; and
a third single-row planetary gear train including a third sun gear, a third planetary gear, a third planet carrier and a third gear ring, wherein the third sun gear is coaxially and fixedly connected with the first half shaft, the third gear ring is fixedly connected with the second sun gear, and the third planet carrier is fixedly connected with the differential housing, wherein
the second single-row two-stage planetary gear train and the first single-row two-stage planetary gear train have a same diameter.

9. An electric differential with a torque vectoring function, comprising:
a main drive mechanism arranged on one side of a differential, wherein an output end of the main drive mechanism is connected with a differential housing for transferring rotating power to the differential housing to drive a vehicle to run;
a TV control drive mechanism arranged on the other side of the differential for outputting torque vectoring control power;
a first single-row planetary gear train including a first sun gear, a first planetary gear, a first planet carrier and a first gear ring, wherein the first sun gear is coaxially and fixedly connected with a first half shaft, and the first gear ring is connected with an output end of the TV control drive mechanism;
a second single-row planetary gear train including a second sun gear, a second planetary gear, a second planet carrier and a second gear ring, wherein the second gear ring is fixed to a drive axle housing, the second planet carrier is fixedly connected with the first planet carrier, and the second sun gear is rotatably supported on the first half shaft; and
a third single-row two-stage planetary gear train including a third sun gear, a third two-stage planetary gear, a third planet carrier and a third gear ring, wherein the third sun gear is coaxially and fixedly connected with the first half shaft, the third gear ring is fixedly connected with the second sun gear, and the third planet carrier is fixedly connected with the differential housing, wherein
the second single-row planetary gear train and the first single-row planetary gear train have a same diameter.

Assignees

• Univ Jilin

Inventors

• Wang Junnian
• Yang Bin

Classifications

• F16H2048/364

  using electric or hydraulic motors · CPC title

• F16H2200/2017

  with six sets of orbital gears · CPC title

• F16H48/08 Primary

  comprising bevel gears · CPC title

• B60K2023/043

  Control means for varying left-right torque distribution, e.g. torque vectoring · CPC title

• B60K17/165

  provided between independent half axles (B60K17/18, B60K17/20 take precedence) · CPC title