Seal arrangement for disengageable reduction drive unit

Details Seal arrangement for disengageable reduction drive unit Seal arrangement for disengageable reduction drive unit

1983-02-10

1985-01-01

Krizmanich, George H.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74405, 384130, F16H 344, F16H 5710, F16H 5700

Patent

active

044910371

ABSTRACT:
In a planetary gear type reduction drive unit having a sleeve shiftable between an extended torque transmitting position wherein both ends are supported and centered on an axis of rotation and a retracted non-torque transmitting position wherein one end is substantially unsupported and susceptible to unbalance oscillation when reverse torque is applied to the planetary gear set, an improved seal arrangement including a flexible lip seal which seals between a stationary portion of the unit and the sleeve in the extended and retracted positions of the latter and a pilot bearing adjacent the seal and engageable on the unsupported end of the sleeve in the retracted position of the latter to control runout and avoid oscillatory deflection of the lip seal.

REFERENCES:
patent: 2939346 (1960-06-01), McCarthy et al.
patent: 3504563 (1970-04-01), Polak
patent: 3504564 (1970-04-01), Kell
patent: 4186626 (1980-02-01), Chamberlain

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