Friction gear transmission systems or components – Friction transmission or element
Patent
1993-04-12
1996-09-03
Braun, Leslie A.
Friction gear transmission systems or components
Friction transmission or element
476 39, 476 50, 475183, F16H 1306
Patent
active
055519296
ABSTRACT:
A traction-type transmission which uses a differential reduction principle whereby the present transmission can generate an extremely high output shaft torque, while maintaining a relatively low tangential force through the traction contact. The traction elements of the present invention operate at a relatively high surface speed whereby a finite tangential force, transmitted through the traction contacts, represents more power through the transmission. The geometry of the mating traction elements produces a traction contact shape which is very long, in the rolling direction, and narrow in width. This traction contact geometry greatly increases the coefficient of traction, since traction is directly related to the buildup of lubricant strain in the rolling direction. In addition, this narrow traction contact shape virtually eliminates fluid shear. Thus, this traction contact shape not only increases the power capacity of the present invention, but also greatly increases its efficiency. The present invention has a very short power path consisting of only two traction contacts, however it can attain a very high input/output ratio in a single stage.
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Braun Leslie A.
Laub David W.
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