Multi-stage power-shift transmission

Patent metadata

Field	Value
Publication number	US-9810299-B2
Application number	US-201314396090-A
Country	US
Kind code	B2
Filing date	Mar 13, 2013
Priority date	Apr 27, 2012
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A power shiftable multi-stage transmission of a planetary design and disposed between an input drive shaft and an output shaft for a vehicle. The multi-stage transmission has two parallel shaft trains, six shift elements, at least two spur gear stages and three planetary gear sets. Each of the planetary gear sets has a sun gear, a ring gear and a planet carrier combined in a carrier having multiple planetary gears. The two shaft trains may be connected to one another via the at least two spur gear stages. Different transmission ratios, between the input drive shaft and the output shaft, may be achieved by selective engagement of the six shift elements such that a plurality of forward gears, at least nine forward gears, and at least one reverse gear, may be implemented.

First claim

The invention claimed is:

1. A power shiftable multi-stage transmission ( 120 ), of a planetary design, being disposed between an input drive shaft (AN) and an output shaft (AB) for a vehicle ( 100 ), the multi-stage transmission comprising:
two parallel shaft trains (WS 1 , WS 2 ),
first, second, third, fourth, fifth and sixth shift elements (K 1 , K 2 , K 3 , K 4 , B 1 , B 2 ), wherein the first, the second, the third, and the fourth shift elements (K 1 , K 2 , K 3 , K 4 ) are clutches and the fifth and the sixth shift elements are brakes (B 1 ,B 2 ),
at least first and second spur gear stages (STS 1 , STS 2 ),
first, second and third planetary gear sets (PS 1 , PS 2 , PS 3 ), and each of the first, the second and the third planetary gear sets (PS 1 , PS 2 , PS 3 ) comprising a sun gear (SO 1 , SO 2 , SO 3 ), a ring gear (HO 1 , HO 2 , HO 3 ) and a planet carrier (ST 1 , ST 2 , ST 3 ) having multiple planetary gears,
the two shaft trains (WS 1 , WS 2 ) being connectable with one another via the at least first and the second spur gear stages (STS 1 , STS 2 ), and
different transmission ratios, between the input drive shaft (AN) and the output shaft (AB), being achieved by selective engagement of at least three of the first, the second, the third, the fourth, the fifth and the sixth shift elements (K 1 , K 2 , K 3 , K 4 , B 1 , B 2 ) such that at least nine forward gears and at least one reverse gear can be implemented.

2. The power shiftable multi-stage transmission ( 120 ) according to claim 1 , wherein
the first, the second and the third planetary gear sets (PS 1 , PS 2 , PS 3 ) and the input drive shaft (AN) are disposed on a first shaft train (WS 1 ) of the two parallel shaft trains (WS 1 , WS 2 ),
the output shaft (AB) is disposed on a second shaft train (WS 2 ) of the two parallel shaft trains (WS 1 , WS 2 ),
the two parallel shaft trains (WS 1 , WS 2 ) are connectable to one another via at least the first and the second spur gear stages (STS 1 , STS 2 ),
the sun gear (SO 2 ) of the second planetary gear set (PS 2 ) of the three planetary gear sets (PS 1 , PS 2 , PS 3 ) and the input drive shaft (AN) are connected or connectable with one another in a rotationally fixed manner and form a first connecting element ( 1 ),
the sun gear (SO 1 ) of the first planetary gear set (PS 1 ) of the three planetary gear sets (PS 1 , PS 2 , PS 3 ), a first spur gear (ST 1 a ) of the first spur gear stage (STS 1 ) of at least the first and the second spur gear stages (STS 1 , STS 2 ) and the ring gear (HO 3 ) of the third planetary gear set (PS 3 ) of the three planetary gear sets (PS 1 , PS 2 , PS 3 ) are connected or connectable to one another, via second, third and fourth connecting elements ( 2 , 3 , 4 ), the second, the third and the fourth connecting elements ( 2 , 3 , 4 ) have a shared connection point, and the second connecting element ( 2 ) is also connected to the sun gear (SO 1 ) of the first planetary gear set (PS 1 ), the third connecting element ( 3 ) is also connected to the first spur gear (ST 1 a ) of the first spur gear stage (STS 1 ) and the fourth connecting element ( 4 ) is also connected to the ring gear (HO 3 ) of the third planetary gear set (PS 3 ),
a first spur gear (ST 2 a ) of the second spur gear stage (STS 2 ) of at least the first and the second spur gear stages (STS 1 , STS 2 ) and the ring gear (HO 1 ) of the first planetary gear set (PS 1 ) are connected or connectable with one another and form a fifth connecting element ( 5 ),
a second spur gear (ST 2 b ) of the second spur gear stage (STS 2 ) and the output shaft (AB) are connected or connectable with one another and form a sixth connecting element ( 6 ),
the carrier (ST 1 ) of the first planetary gear set (PS 1 ) and the input drive shaft (AN) are connected or connectable with one another and form a seventh connecting element ( 7 ),
a second spur gear (ST 1 b ) of the first spur gear stage (STS 1 ) and the output shaft (AB) are connected or connectable with one another and form an eighth connecting element ( 8 ),
the ring gear (HO 2 ) of the second planetary gear set (PS 2 ) and a carrier (ST 3 ) of the third planetary gear set (PS 3 ) are connected or connectable with one another and form a ninth connecting element ( 9 ),
the second shift element (K 2 ) is disposed in a flow of power between the fourth connecting element ( 4 ) and the carrier (ST 2 ) of the second planetary gear set (PS 2 ),
the fifth shift element (B 1 ) is disposed in the flow of power between the sun gear (SO 3 ) of the third planetary gear set (PS 3 ) and a transmission housing (GG), and
a sixth shift element (B 2 ) is disposed in the flow of power between the carrier (ST 2 ) of the second planetary gear set (PS 2 ) and the transmission housing (GG).

3. The power shiftable multi-stage transmission ( 120 ) according to claim 2 , wherein the seventh connecting element ( 7 ) supports a first portion of the first shift element (K 1 ), and, when the first shift element (K 1 ) is engaged, the input drive shaft (AN) is connected to the carrier (ST 1 ) of the first planetary gear set (PS 1 ).

4. The power shiftable multi-stage transmission ( 120 ) according to claim 2 , wherein one of:
the second connecting element ( 2 ) supports a first portion of the second shift element (K 2 ), or
the fifth connecting element ( 5 ) is connected to a second portion of the first shift element (K 1 ).

5. The power shiftable multi-stage transmission ( 120 ) according to claim 2 , wherein the sixth connecting element ( 6 ) is connected to the fifth connecting element ( 5 ), and the first shift element (K 1 ) is disposed to supply power to the second spur gear (ST 1 b ) of the first spur gear stage (STS 1 ) and the output shaft (AB).

6. The power shiftable multi-stage transmission ( 120 ) according to claim 2 , wherein one of:
the third shift element (K 3 ) is disposed in the flow of power between the input drive shaft (AN) and the carrier (ST 2 ) of the second planetary gear set (PS 2 ), or
the third shift element (K 3 ) is disposed in the flow of power between the carrier (ST 2 ) of the second planetary gear set (PS 2 ) and the ninth connecting element ( 9 ).

7. The power shiftable multi-stage transmission ( 120 ) according to claim 2 , wherein the fourth shift element (K 4 ) is disposed in the flow of power between the shared connection point of the third, the fourth and the tenth connecting elements ( 3 , 4 , 10 ) and the output shaft (AB).

8. The power shiftable multi-stage transmission ( 120 ) according to claim 1 , wherein two planetary gear sets (PS 2 , PS 3 ) of the first, the second and the third planetary gear sets and the input drive shaft (AN) are disposed on a first shaft train (WS 1 ) of the two parallel shaft trains (WS 1 , WS 2 ),
the first planetary gear set (PS 1 ) of the three planetary gear sets (PS 1 , PS 2 , PS 3 ) and the output shaft (AB) are disposed on a second shaft train (WS 2 ) of the two parallel shaft trains (WS 1 , WS 2 ),
the two parallel shaft trains (WS 1 , WS 2 ) are connectable to one another via the first spur gear stage, the second spur gear stage and a third spur gear stage (ST 2 , ST 3 , ST 4 ),
the sun gear (SO 2 ) of the second planetary gear set (PS 2 ) of the three planetary gear sets (PS 1 , PS 2 , PS 3 ) and the input drive shaft (AN) are connected in a rotationally fixed manner to one another and form a first connecting element ( 1 ),
the ring gear (HO 3 ) of the third planetary gear set (PS 3 ), a first spur gear (ST 3 a ) of the third spur gear stage (STS 3 ) and a first spur gear (ST 1 a ) of the first spur gear stage (STS 1 ) of the first, the second and the third spur gear stages (STS 2 , STS 3 , STS 4 ) are connected or connectable via th

Assignees

• Zahnradfabrik Friedrichshafen
• Friedrichshafen Ag

Inventors

• Beck Stefan

Classifications

• F16H2200/2046

  with six engaging means · CPC title

• F16H2200/201

  with three sets of orbital gears · CPC title

• F16H2003/445

  without permanent connection between the input and the set of orbital gears · CPC title

• B60K6/48 Primary

  Parallel type · CPC title

• F16H3/66

  composed of a number of gear trains without drive passing from one train to another · CPC title