Ball ramp assembly with variable pitch of the ball grooves

Details Ball ramp assembly with variable pitch of the ball grooves Ball ramp assembly with variable pitch of the ball grooves

2006-10-24

2010-10-05

Le, David D (Department: 3655)

Planetary gear transmission systems or components

Differential planetary gearing

C475S249000, C475S328000, C192S054520, C192S084700

Reexamination Certificate

active

07806797

ABSTRACT:
An axial setting device includes two discs which are centered on a common axis. One is axially supported and the other one is axially displaceable, and at least one is rotatingly drivable. The two discs on their end faces, each have a plurality of circumferential ball grooves. The ball grooves each comprise a depth which decreases in the same direction, and each pair of opposed ball grooves accommodates a ball. At least the ball grooves of one of the two discs, starting from the region of the greatest groove depth, comprise a first groove portion with a greater pitch and an adjoining second groove portion with a smaller pitch, wherein the first groove portion extends over a smaller circular-arch-shaped portion than the second groove portion.

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