Transmission for a motor vehicle

Patent metadata

Field	Value
Publication number	US-9267577-B2
Application number	US-201414260855-A
Country	US
Kind code	B2
Filing date	Apr 24, 2014
Priority date	Jun 5, 2013
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A motor vehicle transmission having a housing, input and output shafts, shifting elements, a first planetary gearset having sun, ring and planet gears and a carrier and a second planetary gearset having planet gears and carriers that are rigidly coupled. The carriers of the first and the second gearsets are fixed, respectively, to the output and input shafts. A sun gear of the second gearset can be connected by a first shifting element to the housing and by a second shifting element to the input shaft. The ring gear of the first gearset can be connected by a third shifting element to the housing and by a fourth shifting element to the carrier of the first planetary gearset. The sun gear of the first gearset and ring gear of the second gearset are rigidly coupled, and the shifting elements are arranged in the housing and are accessible from the outside.

First claim

The invention claimed is:

1. A transmission ( 1 , 10 ) for a motor vehicle, the transmission ( 1 , 10 ) comprising:
a housing (G),
a drive input shaft (ANW),
a drive output shaft (AW),
at least first and second planetary gearsets (PG 1 , PG 4 ), the first planetary gearset (PG 4 ) comprising a sun gear ( 104 ), at least one planetary gearwheel ( 114 ), a planetary carrier ( 124 ) and a ring gear ( 134 ), as well as a plurality of shifting elements (A to F, H, J, K, L, V, R, X, Y), and the second planetary gearset (PG 1 ) comprising at least two planetary gearwheels ( 111 . 1 , 111 . 2 ) and two planetary carriers ( 121 . 1 , 121 . 2 ) on which the respective planetary gearwheels ( 111 . 1 , 111 . 2 ) are mounted to rotate,
the two carriers ( 121 . 1 , 121 . 2 ) of the second planetary gearset (PG 1 ) being connected, in a rotationally fixed manner, to one another and to the drive input shaft (ANW),
the carrier ( 124 ) of the first planetary gearset (PG 4 ) being connected, in a rotationally fixed manner, to the drive output shaft (AW),
a sun gear ( 101 ) of the second planetary gearset (PG 1 ) being connectable, by at least one first shifting element (K 1 , B), to the housing (G) and the sun gear ( 101 ) of the second planetary gearset (PG 1 ) being connectable, by at least one second shifting element (A), to the drive input shaft (ANW),
the ring gear ( 134 ) of the first planetary gearset (PG 4 ) being connectable, by a third shifting element (E), to the housing (G), and, by a fourth shifting element (F), to the carrier ( 124 ) of the first planetary gearset (PG 4 ),
the sun gear ( 104 ) of the first planetary gearset (PG 4 ) and a ring gear ( 131 ) of the second planetary gearset (PG 1 ) being connected, in a rotationally fixed manner, to one another, and
all of the shifting elements (A, B, E, F, K 1 ) being arranged in the housing (G) and being accessible from an outside.

2. The transmission according to claim 1 , wherein the transmission further comprises at least one of third, fourth, fifth and sixth planetary gearsets (PG 2 , PG 3 , PG 5 , PG 6 ) such that at least one of:
at least two of the first, the second, the third, the fourth, the fifth and the sixth planetary gearsets (PG 1 , PG 2 , PG 3 , PG 4 , PG 5 , PG 6 ) are geometrically arranged, one behind another, in the transmission ( 1 , 10 ); and
at least two of the first, the third, the fifth and the sixth planetary gearsets (PG 3 , PG 4 ; PG 5 , PG 6 ) are arranged, in a nested manner, such that at least one of the first planetary gearset (PG 4 ) is nested inside the fourth planetary gearset (PG 3 ) and the fifth planetary gearset (PG 5 ) is nested inside the sixth planetary gearset (PG 6 ).

3. The transmission according to claim 2 , wherein
the third planetary gearset (PG 2 ) is arranged either between the second and the fourth planetary gearsets (PG 1 , PG 3 ), or between the first and the second planetary gearsets (PG 4 , PG 1 ), or between the second and the fifth planetary gearsets (PG 1 , PG 5 ), and
a sun gear ( 102 ) of the third planetary gearset (PG 2 ) is one of fixedly connected to the housing (G) or is connectable to the housing (G) by a fifth shifting element (B 2 , C).

4. The transmission according to claim 2 , wherein a carrier ( 122 ) of the third planetary gearset (PG 2 ) is at least one of:
rotationally fixed to a ring gear ( 133 ) of the fourth planetary gearset (PG 3 ), connected to a sun gear ( 105 ) of the fifth planetary gearset (PG 5 ),
connectable by a sixth shifting element (C) to the sun gear ( 104 ) of the first planetary gearset (PG 4 ), and
connectable by a seventh shifting element (D) to the ring gear ( 133 ) of the fourth planetary gearset (PG 3 ).

5. The transmission according to claim 2 , wherein the carriers ( 111 . 1 , 111 . 2 ) of the second planetary gearset (PG 1 ) are either rotationally fixedly connected to a ring gear ( 132 ) of the third planetary gearset (PG 2 ) or are connectable, by an eighth shifting element (X, K 2 ), to the ring gear ( 132 ) of the third planetary gearset (PG 2 ).

6. The transmission according to claim 1 , wherein an electric machine (EM) is provided to enable obtaining at least one reversing gears of the transmission ( 1 , 10 ).

7. The transmission according to claim 2 , wherein a sun gear ( 103 ) of the fourth planetary gearset (PG 3 ) is one of connected to the housing (G) or is connectable to the housing (G) by a ninth shifting element (K, Y).

8. The transmission according to claim 2 , wherein a sun gear ( 103 ) of the fourth planetary gearset (PG 3 ) is connectable, by a tenth shifting element (J), to a ring gear ( 133 ) of the fourth planetary gearset (PG 3 ).

9. The transmission according to claim 1 , wherein the ring gear ( 134 ) of the first planetary gearset (PG 4 ) is at least one of:
rotationally fixedly connected to the sun gear ( 104 ) of the first planetary gearset (PG 4 ),
connectable by the third shifting element (E) to the housing (G), and
connectable by the fourth shifting element (F) to the drive output shaft (AW).

10. The transmission according to claim 2 , wherein the fifth planetary gearset (PG 5 ) and the sixth planetary gearset (PG 6 ) are arranged in a nested manner and form a reversing gear group, the reversing gear group is arranged on an output side of the transmission ( 1 ) and a sun gear ( 105 ) of the fifth planetary gearset (PG 5 ) is rotationally fixedly connected to the carrier ( 124 ) of the first planetary gearset (PG 4 ),
a carrier ( 125 ) of the fifth planetary gearset (PG 5 ) is connectable to the housing (G), by an eleventh shifting element (R), for obtaining at least one reversing gear (R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 ), and
a sun gear ( 106 ) of the sixth planetary gearset (PG 6 ) is connectable, by a twelfth shifting element (L), to the housing (G) and the sun gear ( 106 ) of the sixth planetary gearSet (PG 6 ) is connectable, by a thirteenth shifting element (H), to the carrier ( 125 ) of the fifth planetary gearset (PG 5 ).

11. The transmission according to claim 2 , wherein the fifth planetary gearset (PG 5 ) is arranged on an input side of the transmission ( 1 ) and a sun gear ( 105 ) of the fifth planetary gearset (PG 5 ) is rotationally fixedly connected to the drive input shaft (ANW), and
a carrier ( 125 ) of the fifth planetary gearset (PG 5 ) is either:
connectable to the housing (G), by an eleventh shifting element (R), in order to produce at least one reversing gear (R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 ), or
connectable, by a further shifting element (V), to the drive input shaft (ANW) in order to implement at least one forward gear (V 1 , V 2 , V 3 , V 4 , V 5 , V 6 , V 7 , V 8 , V 9 , V 10 , V 11 , V 12 , V 13 , V 14 ).

12. The transmission according to claim 1 , wherein the first planetary gearset (PG 4 ) and the second planetary gearset (PG 1 ) form a first partial transmission (TG 1 ), and the first planetary gearset (PG 4 ) together with a third planetary gearset (PG 2 ) and a fourth planetary gearset (PG 3 ) form a second partial transmission (TG 2 ).

13. The transmission according to claim 1 , wherein an intermediate gear system (VG 3 ) is provided such that the intermediate gear system (VG 3 ) comprises at least one countershaft (VW 1 ) and at least two gearwheel planes (I, II) of which a first gearwheel plane (I) is connectable, by a shifting element (D), to a carrier ( 122 ) of a third planetary gearset (PG 3 ) and a second gearwheel plane (II) is in driving connection with the carrier ( 124 ) of the first planetary gearset (PG 4 ).

14. The transmission according to claim 1 , wherein a separator

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Kaltenbach Johannes

Classifications

• F16H2200/2017

  with six sets of orbital gears · CPC title

• F16H2200/0078

  the gear ratio comprising twelve or more forward speeds · CPC title

• F16H2200/006

  the gear ratios comprising eight forward speeds · CPC title

• F16H2200/2046

  with six engaging means · CPC title

• F16H2200/2012

  with four sets of orbital gears · CPC title