US 9,039,562 B2Granted

Multi-speed gearbox

AssigneeZF Friedrichshafen AG

InventorsStefan Beck, Christian Sibla, Wolfgang Rieger

Life of this patent

Estimating the term…

Loading patent…

Abstract

Multi-stage transmission comprising four gear sets, shafts and shift elements. Sun of first set is connected to eighth shaft connected to sun of second set and is connectable, via third clutch, to drive shaft. Drive shaft is connectable, via first clutch, to fourth shaft connected to ring of first set and is couplable, via first brake, to the housing. Drive shaft is connectable, via second clutch, to seventh shaft connected to carrier of second set and being connectable, via fourth clutch, to third shaft which is connectable to ring of third set. Sixth shaft is connected to ring of second set and carrier of fourth set. Sun of third set is coupled to housing. Fifth shaft is connected to carrier of first set and sun of fourth set and is couplable, via second brake, to housing. Output shaft is connected to carrier of third set and ring of fourth set.

Claims16

Dependent claims

A multi-stage transmission of a planetary design comprising:

a drive shaft (1),
an output shaft (2),
first, second, third and fourth planetary gear sets each having a sun gear, a carrier and a ring gear (P1, P2, P3, P4) which are disposed in a housing (G),
third, fourth, fifth, six, seventh and eighth rotatable shafts (3, 4, 5, 6, 7, 8),
six shift elements (03, 04, 05, 14, 17, 18), comprising brakes (04, 05) and clutches (14, 17, 18, 37), whose selective engagement produces different transmission ratios between the drive shaft (1) and the output shaft (2) so that nine forward gears and one reverse gear are implementable,
wherein the eighth shaft (8) is connected to both the sun gear of the first planetary gear set (P1) and the sun gear of the second planetary gear set (P2), and the eighth shaft (8) which can be detachably connected, via a third clutch (18), to the drive shaft (1),
the drive shaft (1) can be detachably connected, via a first clutch (14), to the fourth shaft (4), the fourth shaft (4) which is connected to the ring gear of the first planetary gear set (P1), and the fourth shaft (4) can be coupled, via a first brake (04), to the housing (G),
the drive shaft (1) can be detachably connected, via a second clutch (17), to the seventh shaft (7), the seventh shaft (7) is connected to the carrier of the second planetary gear set (P2), and the seventh shaft (7) can be detachably connected, via a fourth clutch (37), to the third shaft (3), the third shaft (3) is connected to the ring gear of the third planetary gear set (P3),
the sixth shaft (6) is connected to both the ring gear of the second planetary gear set (P2) and the carrier of the fourth planetary gear set (P4),
the sun gear of the third planetary gear set (P3) is coupled to the housing (G),
the fifth shaft (5) is connected to both the carrier of the first planetary gear set (P1) and the sun gear of the fourth planetary gear set (P4) and the fifth shaft (5) can be coupled, via a second brake (05), to the housing (G), and
the output shaft (2) is connected to both the carrier of the third planetary gear set (P3) and the ring gear of the fourth planetary gear set (P4).

9 more elements

A multi-stage transmission of a planetary design comprising:

a drive shaft,
an output shaft,
first, second, third and fourth planetary gear sets which are disposed in a housing, and each of the first, the second, the third and the fourth planetary gear sets comprises a ring gear, a carrier and a sun gear,
third, fourth, fifth, six, seventh and eighth rotatable shafts,
six shift elements, comprising brakes and clutches, whose selective engagement produces different transmission ratios between the drive shaft and the output shaft so that nine forward gears and one reverse gear are implementable,
wherein the eighth shaft is connected to both the sun gear of the first planetary gear set and the sun gear of the second planetary gear set, and the eighth shaft which can be detachably connected, via a third clutch, to the drive shaft,
the drive shaft can be detachably connected, via a first clutch, to the fourth shaft, the fourth shaft which is connected to the ring gear of the first planetary gear set, and the fourth shaft can be coupled, via a first brake, to the housing,
the drive shaft can be detachably connected, via a second clutch, to the seventh shaft, the seventh shaft is connected to the carrier of the second planetary gear set, and the seventh shaft can be detachably connected, via a fourth clutch, to the third shaft, the third shaft is connected to the ring gear of the third planetary gear set,
the sixth shaft is connected to both the ring gear of the second planetary gear set and the carrier of the fourth planetary gear set,
the sun gear of the third planetary gear set is coupled to the housing,
the fifth shaft is connected to both the carrier of the first planetary gear set and the sun gear of the fourth planetary gear set and the fifth shaft can be coupled, via a second brake, to the housing, and
the output shaft is directly connected to both the carrier of the third planetary gear set and the ring gear of the fourth planetary gear set.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/396,074Filed 13 Mar 2013
Priority: DE 10 2012 206 78225 Apr 2012
Published: US 2015/0087468 A126 Mar 2015
Granted: 26 May 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16H 3/66
Gearings having three or more central gears: composed of a number of gear trains without drive passing from one train to another
F16H 2003/445
Using gears having orbital motion: without permanent connection between the input and the set of orbital gears
F16H 2200/0065
Characterised by the number of forward speeds: the gear ratios comprising nine forward speeds
F16H 2200/2012
Characterised by the number of sets of orbital gears: with four sets of orbital gears

Family

US 2015/0087468 A1Pre-grant publication · published 26 Mar 2015
US 9,039,562 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key