Speed change gear for automatic transmission

Details Speed change gear for automatic transmission Speed change gear for automatic transmission

2005-07-19

2005-07-19

Ho, Ha (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S275000

Reexamination Certificate

active

06918852

ABSTRACT:
A speed change gear for an automatic transmission includes: an input portion; an output portion; and a plurality of planetary gear sets including a compound planetary gear set. The plurality of the planetary gear sets has a clutch and a brake. The clutch includes a first clutch and a second clutch for connecting and disconnecting the reduced rotation from a speed reduction planetary gear set to the compound planetary gear set, and a third clutch which is a direct clutch for outputting the input rotation at a constant speed to the compound planetary gear set. The third clutch is disposed radially outward relative to a first ring gear of the speed reduction planetary gear set. The first ring gear has an outer periphery which is provided with a clutch hub. The clutch hub constitutes the direct clutch and is an input member to the third clutch.

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