Planetary traction drive with multiple inputs

Details Planetary traction drive with multiple inputs Planetary traction drive with multiple inputs

2006-03-28

2006-03-28

Lewis, Tisha (Department: 3681)

Planetary gear transmission systems or components

Planet pinion is friction gear

C475S337000

Reexamination Certificate

active

07018316

ABSTRACT:
A traction drive has inner and outer rings and drive and idler rollers organized in two rows between the rings, with the drive rollers being in an inner row and the idler rollers being in an outer row. The drive rollers contact the inner ring and the idler rollers contact the outer ring. At least one idler roller exists for every drive roller, with the idler roller and its drive roller being in contact between the two rings. Moreover, each idler roller is offset slightly circumferentially with respect to its drive roller such that the idler roller occupies a convergent space between its drive roller and the outer ring. The drive rollers rotate within an inner carrier, while the idler rollers rotate within an outer carrier and one of the carriers can rotate slightly relative to the other carrier. Each drive roller may be coupled with an electric motor. In one direction of rotation for the drive rollers, the idler rollers that are offset slightly behind the drive rollers are drawn into the convergent spaces between the drive rollers and the outer ring and this increases the contact forces between the rollers and their respective rings and between the rollers themselves. An actuator may be used to effect rotation between the carriers.

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