Transmission

Patent metadata

Field	Value
Publication number	US-2016017960-A1
Application number	US-201514799812-A
Country	US
Kind code	A1
Filing date	Jul 15, 2015
Priority date	Jul 15, 2014
Publication date	Jan 21, 2016
Grant date	—

Abstract

A transmission (G) is provided with four planetary gear sets (P 1 , P 2 , P 3 , P 4 ), several shafts (W 1 -W 7 ) and a first, second, third, fourth and fifth shift element (B 1 , B 2 , K 1 , K 2 , K 3 ), the selective meshing of which brings about different transmission ratio relationships between a transmission input shaft (GW 1 ) and a transmission output shaft (GW 2 ). The transmission (G) includes a sixth shift element (K 4 ), through which the fifth shaft (W 5 ) is connectable to the sun gear (So-P 4 ) of the fourth planetary gear set (P 4 ), either directly or through the second shift element (B 2 ), and whereas the fourth shaft (W 4 ) is connectable through the fourth shift element (K 2 ) with the sun gear (So-P 4 ) of the fourth planetary gear set (P 4 ), either directly or through the second shift element (B 2 ).

First claim

1 - 14 . (canceled)

15 . A transmission (G), comprising:
four planetary gear sets (P 1 , P 2 , P 3 , P 4 ), a plurality of shafts (W 1 -W 7 ), and a first, second, third, fourth and fifth shift element (B 1 , B 2 , K 1 , K 2 , K 3 ), wherein selective meshing of the shift elements brings about different transmission ratio relationships between a transmission input shaft (GW 1 ) and a transmission output shaft (GW 2 ); a first one of the shafts (W 1 ) constantly connected to the transmission input shaft (GW 1 ) and to a bar (St-P 3 ) of the third planetary gear set (P 3 ); a second one of the shafts (W 2 ) constantly connected to the transmission output shaft (GW 2 ) and to a bar (St-P 1 ) of the first planetary gear set (P 1 ); a third one of the shafts (W 3 ) constantly connected to a sun gear (So-P 3 ) of the third planetary gear set (P 3 ) and fixable in a torque-proof manner through the first shift element (B 1 ); a fourth one of the shafts (W 4 ) constantly connected to a bar (St-P 2 ) of the second planetary gear set (P 2 ); a fifth one of the shafts (W 5 ) constantly connected to a ring gear (Ho-P 2 ) of the second planetary gear set (P 2 ); a sixth one of the shafts (W 6 ) constantly connected to a ring gear (Ho-P 1 ) of the first planetary gear set (P 1 ); a ring gear (Ho-P 3 ) of the third planetary gear set (P 3 ) constantly connected to a sun gear (So-P 2 ) of the second planetary gear set (P 2 ) and forming a component of a seventh shaft (W 7 ); the first shaft (W 1 ) connectable through the third shift element (K 1 ) with the fifth shaft (W 5 ); the second shaft (W 2 ) connectable through the fifth shift element (K 3 ) with the fourth shaft (W 4 ); through locking of the second shift element (B 2 ), turning moment is transferable between the elements of sun gear (So-P 4 ), bar (St-P 4 ) and ring gear (Ho-P 4 ) of the fourth planetary gear set (P 4 ); a sixth shift element (K 4 ), through which the fifth shaft (W 5 ) is connectable to the sun gear (So-P 4 ) of the fourth planetary gear set (P 4 ), either directly or through the second shift element (B 2 ); and the fourth shaft (W 4 ) connectable through the fourth shift element (K 2 ) with the sun gear (So-P 4 ) of the fourth planetary gear set (P 4 ), either directly or through the second shift element (B 2 ).

16 . The transmission (G) according to claim 15 , wherein the fourth planetary gear set (P 4 ) is one of a negative gear set or a positive gear set, such that
when the fourth planetary gear set (P 4 ) is a negative gear set, the bar (St-P 4 ) of the fourth planetary gear set (P 4 ) is constantly connected to a sixth shaft (W 6 ), and the ring gear (Ho-P 4 ) of the fourth planetary gear set (P 4 ) is fixable in a torque-proof manner through the second shift element (B 2 ); when the fourth planetary gear set (P 4 ) is a positive gear set, the ring gear (Ho-P 4 ) of the fourth planetary gear set (P 4 ) is constantly connected to the sixth shaft (W 6 ), and the bar (St-P 4 ) is fixable in a torque-proof manner through the second shift element (B 2 ); a sun gear (So-P 1 ) of the first planetary gear set (P 1 ) is constantly connected to the third shaft (W 3 ); and through a sixth shift element (K 4 ) and the fourth shaft (W 4 ), the fifth shaft (W 5 ) is directly connectable to the sun gear (So-P 4 ) of the fourth planetary gear set (P 4 ) through the fourth shift element (K 2 ).

17 . The transmission (G) according to claim 15 , wherein the fourth planetary gear set (P 4 ) is one of a negative gear set or a positive gear set, such that
when the fourth planetary gear set (P 4 ) is a negative gear set, the bar (St-P 4 ) of the fourth planetary gear set (P 4 ) is connectable through the second shift element (B 2 ) with a sixth shaft (W 6 ), and the ring gear (Ho-P 4 ) of the fourth planetary gear set (P 4 ) is constantly fixed in a torque-proof manner; when the fourth planetary gear set (P 4 ) is a positive gear set, the ring gear (Ho-P 4 ) is connectable through the second shift element (B 2 ) with the sixth shaft (W 6 ), and the bar (St-P 4 ) of the fourth planetary gear set (P 4 ) is constantly fixed in a torque-proof manner; a sun gear (So-P 1 ) of the first planetary gear set (P 1 ) is constantly connected to the third shaft (W 3 ); and through a sixth shift element (K 4 ) and the fourth shaft (W 4 ), the fifth shaft (W 5 ) is connectable directly to the sun gear (So-P 4 ) of the fourth planetary gear set (P 4 ) through the fourth shift element (K 2 ).

18 . The transmission (G) according to claim 15 , wherein:
the fifth shaft (W 5 ) is connectable to the sun gear (So-P 4 ) of the fourth planetary gear set (P 4 ) through locking of the second shift element (B 2 ) and a sixth shift element (K 4 ); the fourth shaft (W 4 ) is connectable to the sun gear (So-P 4 ) of the fourth planetary gear set through locking of the fourth shift element (K 2 ) and the second shift element (B 2 ); a sun gear (So-P 1 ) of the first planetary gear set (P 1 ) is constantly connected to the third shaft (W 3 ); the fourth planetary gear set (P 4 ) is one of a negative gear set or a positive gear set, such that
when the fourth planetary gear set (P 4 ) is a negative gear set, the bar (St-P 4 ) of the fourth planetary gear set (P 4 ) is constantly connected to a sixth shaft (W 6 ), and the ring gear (Ho-P 4 ) of the fourth planetary gear set (P 4 ) is constantly fixed in a torque-proof manner; and
when the fourth planetary gear set (P 4 ) is a positive gear set, the ring gear (Ho-P 4 ) of the fourth planetary gear set (P 4 ) is constantly connected to the sixth shaft (W 6 ), and the bar (St-P 4 ) of the fourth planetary gear set (P 4 ) is constantly fixed in a torque-proof manner.

19 . The transmission (G) according to claim 15 , wherein:
a sun gear (So-P 1 ) of the first planetary gear set (P 1 ) is connectable to the third shaft (W 3 ) through the second shift element (B 2 ); through a sixth shift element (K 4 ) and the fourth shaft (W 4 ), the fifth shaft (W 5 ) is connectable directly to the sun gear (So-P 4 ) of the fourth planetary gear set (P 4 ) through the fourth shift element (K 2 ); the fourth planetary gear set (P 4 ) is one of a negative gear set or a positive gear set, such that
when the fourth planetary gear set (P 4 ) is a negative gear set, the bar (St-P 4 ) of the fourth planetary gear set (P 4 ) is constantly connected to a sixth shaft (W 6 ), and the ring gear (Ho-P 4 ) of the fourth planetary gear set (P 4 ) is constantly fixed in a torque-proof manner; and
when the fourth planetary gear set (P 4 ) is a positive gear set, the ring gear (Ho-P 4 ) of the fourth planetary gear set (P 4 ) is constantly connected to the sixth shaft (W 6 ), and the bar (St-P 4 ) of the fourth planetary gear set (P 4 ) is constantly fixed in a torque-proof manner.

20 . The transmission (G) according to claim 15 , wherein the transmission (G) features ten forward gears ( 1 - 10 ), and:
the first forward gear ( 1 ) arises through locking of the first shift element (B 1 ), the second shift element (B 2 ), the third shift element (K 1 ) and a sixth shift element (K 4 ); the second forward gear ( 2 ) arises through locking of the first shift element (B 1 ), the second shift element ( 82 ), the third shift element (K 1 ) and the fourth shift element (K 2 ); the third forward gear ( 3 ) arises through locking of the first shift element (B 1 ), the second shift element (B 2 ), the fourth shift element (K 2 ) and the sixth shift element (K 4 ); the fourth forward gear ( 4 ) arises through locking of the second shift element (B 2 ), the third shift element (K 1 ), the fourth shift element (K 2 ) and the sixth shift element (K 4 ); the fifth forward gear ( 5 ) arises through locking of the second shift elemen

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Beck Stefan
• Sibla Christian
• Brehmer Martin
• Haupt Josef

Classifications

• F16H2200/2097

  comprising an orbital gear set member permanently connected to the housing, e.g. a sun wheel permanently connected to the housing · CPC title

• F16H2200/2048

  with seven engaging means · CPC title

• F16H3/666

  with intermeshing orbital gears (F16H3/663 takes precedence) · CPC title

• F16H2200/0073

  the gear ratios comprising eleven forward speeds · CPC title

• F16H2003/442

  comprising two or more sets of orbital gears arranged in a single plane · CPC title