Continuously variable transmission employing cable wound around

Details Continuously variable transmission employing cable wound around Continuously variable transmission employing cable wound around

1997-09-08

1998-11-03

Hannon, Thomas R.

Endless belt power transmission systems or components

Pulley with expansible rim means or pulleys with alternately...

Structure for variably adjusting radius of rim section

474 64, F16H 902, F16H 700

Patent

active

058300937

ABSTRACT:
A continuously variable transmission system for coupling between a rotating drive shaft and an output shaft employs a first drum rotated by the drive shaft and a second drum connected to the output shaft. At least one, and typically both, of the drums have a region of adjustable effective diameter. A closed cable encircling the first and the second drums is wrapped around each of the first and the second drums a plurality of times so as to provide effective tractional locking even at low clamping forces. In preferred embodiments, a mechanism is provided for preventing creep of the cable along the drum. The mechanism typically includes a number of elements each having a helical groove and deployed such that the cable engages a part of the groove, and a mechanism for rotating the elements so as to change the portion of the groove with which the cable engages.

REFERENCES:
patent: 4810234 (1989-03-01), Kumm

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