Transmission unit, power transmission system and vehicle comprising the same

Patent metadata

Field	Value
Publication number	US-2016207392-A1
Application number	US-201514755775-A
Country	US
Kind code	A1
Filing date	Jun 30, 2015
Priority date	Jan 16, 2015
Publication date	Jul 21, 2016
Grant date	—

Abstract

A transmission unit includes: input shafts; output shafts configured to transmit with a corresponding input shaft via gears; a reverse output gear fitted over one output shaft; a reverse synchronizer; a reverse shaft configured to rotate together with a input shaft and a reverse output gear; a motor power shaft; a first and a second motor gears fitted over the motor power shaft; the second motor gear configured to rotate together with a shift driven gear; and a motor synchronizer. A power transmission system including the transmission unit and a vehicle including the power transmission system are also provided.

First claim

What is claimed is:

1 . A transmission unit for a vehicle, comprising:
a plurality of input shafts, each of the input shafts having a shift driving gear thereon; a plurality of output shafts, each of the output shafts having a shift driven gear configured to mesh with a corresponding shift driving gear; a reverse output gear fitted over one of the output shafts; a reverse synchronizer configured to engage with the reverse output gear; a reverse shaft configured to rotate together with one of the input shafts and to rotate together with the reserve output gear; a motor power shaft; a first motor gear fitted over the motor power shaft; a second motor gear fitted over the motor power shaft and configured to rotate together with one of the shift driven gears; and a motor synchronizer disposed on the motor power shaft and between the first and second motor gears.

2 . The transmission unit according to claim 1 , further comprising:
an idler shaft; a first idler gear fixed on the idler shaft and configured to mesh with one of the shift driven gears; and a second idler gear fixed on the idler shaft and configured to mesh with the second motor gear.

3 . The transmission unit according to claim 1 , further comprising:
an idler shaft; and
a third idler gear fixed on the idler shaft, wherein power of the second motor gear is transmitted to one of the shift driven gears by the third idler gear.

4 . The transmission unit according to claim 1 , wherein the second motor gear is configured to mesh with one of the shift driven gears directly.

5 . The transmission unit according to claim 1 , wherein the reverse output gear includes one or two reverse output gears; wherein one or two reverse idler gears are disposed on the reverse shaft; and wherein the reverse idler gears are configured to mesh with the corresponding reverse output gears.

6 . The transmission unit according to claim 5 , wherein each of the reverse output gears is configured to share a shift synchronizer with an adjacent shift driven gear; wherein the shift synchronizer is configured as the reverse synchronizer.

7 . The transmission unit according to claim 6 , wherein the plurality of input shafts comprise a first input shaft and a second input shaft coaxially fitted over the first input shaft; wherein the plurality of output shafts comprise a first and a second output shaft.

8 . The transmission unit according to claim 4 , wherein the plurality of shift driving gears comprise: a first-gear driving gear fixed on the first input shaft, a second-gear driving gear fixed on the second input shaft, a third-gear driving gear fixed on the first input shaft, a fourth-gear driving gear fixed on the second input shaft, a fifth-gear driving gear fixed on the first input shaft, and a fourth-sixth-gear driving gear fixed on the second input shaft;
wherein the plurality of shift driven gears comprise: first-gear to fourth-gear driven gears fitted over the first output shaft, a fifth-gear driven gear and a sixth-gear driven gear fitted over the second output shaft; and wherein the power transmission system further comprises a first-third gear synchronizer disposed between the first-gear driven gear and the third-gear driven gear, a second-fourth gear synchronizer disposed between the second-gear driven gear and the fourth-gear driven gear, a fifth gear synchronizer disposed on a side of the fifth-gear driven gear, and a sixth gear synchronizer disposed on a side of the sixth-gear driven gear.

9 . The transmission unit according to claim 7 , wherein the plurality of shift driving gears comprise: a first-gear driving gear fixed on the first input shaft, a second-gear driving gear fixed on the second input shaft, a third-gear driving gear fixed on the first input shaft, a fourth-gear driving gear fixed on the second input shaft, a fifth-gear driving gear fixed on the first input shaft, and a fourth-sixth-gear driving gear fixed on the second input shaft;
wherein the plurality of shift driven gears comprise: a first-gear driven gear fitted over the first output shaft, a second-gear driven gear fitted over the first output shaft, a third-gear driven gear fitted over the second output shaft, a fourth-gear driven gear fitted over the first output shaft, a fifth-gear driven gear fitted over the first output shaft, and a sixth-gear driven gear fitted over the second output shaft; and wherein the power transmission system further comprises a first-fifth gear synchronizer disposed between the first-gear driven gear and the fifth-gear driven gear, a second-fourth gear synchronizer disposed between the second-gear driven gear and the fourth-gear driven gear, a third gear synchronizer disposed on a side of the third-gear driven gear, and a sixth gear synchronizer disposed on a side of the sixth-gear driven gear.

10 . The transmission unit according to claim 9 , wherein the distance between the fifth-gear shift driving gear and the engine, the distance between the first-gear shift driving gear and the engine, and the distance between the third-gear shift driving gear and the engine are in order from large to small;
wherein the distance between the third-gear shift driving gear and the engine, the distance between the first-gear shift driving gear and the engine, and the distance between the fifth-gear shift driving gear and the engine are in order from large to small; and wherein the distance between the first-gear shift driving gear and the engine, the distance between the fifth-gear shift driving gear and the engine, and the distance between the third-gear shift driving gear and the engine are in order from large to small.

11 . The transmission unit according to claim 7 , further comprising a first output gear fixed on the first output shaft and a second output gear fixed on the second output shaft, wherein the first output gear, the second output gear and the first motor gear are configured to mesh with the driven gear of a main reducer.

12 . A power transmission system for a vehicle, comprising:
a transmission unit according to claim 1 ; and a first motor generator configured to rotate together with the motor power shaft of the transmission unit.

13 . The power transmission system according to claim 12 , wherein:
the reverse output gear includes one or two reverse output gears; one or two reverse idler gears are disposed on the reverse shaft; the reverse idler gears are configured to mesh with the corresponding reverse output gears, and each of the reverse output gears is configured to share a shift synchronizer with an adjacent shift driven gear; the shift synchronizer is configured as the reverse synchronizer; the plurality of input shafts comprise a first input shaft and a second input shaft coaxially fitted over the first input shaft; the plurality of output shafts comprise a first and a second output shaft; and wherein the power transmission system further comprises:
an engine; and
a dual clutch, wherein the dual clutch comprises: an input terminal connected with the engine, a first output terminal connected with the first input shaft, and a second output terminal connected with the second input shaft.

14 . The transmission unit according to claim 12 , further comprising a third motor gear fixed on the motor power shaft;
wherein the first motor generator is configured to mesh with the third motor gear directly.

15 . The transmission unit according to claim 14 , further comprising a first generator gear disposed on the motor shaft of the first motor generator, and to perform a transmission with the third motor ge

Assignees

• Byd Co Ltd

Inventors

• Zhang Jintao
• Hua Yu
• Chai Lingdao
• Mu Jinhui
• Liu Jing

Classifications

• B60K6/36 Primary

  characterised by the transmission gearings · CPC title

• F16H37/0806

  with a plurality of driving or driven shafts · CPC title

• F16H2003/0822

  characterised by the arrangement of at least one reverse gear · CPC title

• F16H3/085

  with more than one output shaft · CPC title

• B60K6/365

  with the gears having orbital motion · CPC title