Balanced force anti-spin friction drive

Details Balanced force anti-spin friction drive Balanced force anti-spin friction drive

1994-12-05

1996-05-28

Herrmann, Allan D.

Friction gear transmission systems or components

Stepless ratio change

Intermediate idler between driving and driven gears

476 55, F16H 1544

Patent

active

055205925

ABSTRACT:
This invention relates to a friction drive that uses two straight sided cones, the apexes of which are located at a common point. A driving or driven roller is located between the two cones so that rotation of this roller causes (or is caused by) the rotation of the cones. The rotary axis of the roller passes through the point at the apexes of the cones. In this manner the roller element in contact with the surfaces of the cones becomes an element of a cone rolling correctly on the two cones without experiencing any spin. The use of two cones balances the forces on the roller and doubles the torque that can be transmitted between the roller and the cones. A different embodiment of the invention uses two or more rollers contacting the two cones. By changing the position of the rollers it is possible to obtain a very large speed ratio between the rollers.

REFERENCES:
patent: 1247732 (1917-11-01), Shelton
patent: 3158041 (1964-11-01), Rae
patent: 5014565 (1991-05-01), Stephenson
patent: 5407399 (1995-04-01), Rabiniow
Loewenthal, S. H. "Advances in Traction Drive Technology" NASA Technical--Prior Sep. 21, 1983 Memorandum No. 83397, Sep.1983.
Lubomyr O. Hewko "Automotive Traction Drive CVTs--An Overview" Sep. 1986.

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