Autotensioner

Details Autotensioner Autotensioner

1993-05-28

1994-07-12

Britts, Ramon S.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Pulley or guide roll has eccentric mount for shifting or...

474135, F16H 710

Patent

active

053284151

ABSTRACT:
An autotensioner having a fixed shaft, a pulley support pivotally supported on the fixed shaft, a pulley rotatably supported on the pulley support and a spring for biasing the pulley support in such a direction as to apply tension to a belt. The pulley support has a cylindrical portion arranged coaxially with the fixed shaft. The fixed shaft is formed with cam surfaces at such a position that wedge-shaped spaces are defined between the cam surfaces and the cylindrical portion. The wedge-shaped spaces narrow in a direction in which the pulley support pivots to slacken the belt. Friction members are each mounted in the respective wedge-shaped spaces. They have a shape substantially complementary to the shape of the wedge-shaped spaces. A spring member is also mounted in each wedge-shaped space to bias the friction members into the narrow area of each wedge-shaped space.

REFERENCES:
patent: 4634407 (1987-01-01), Holtz
patent: 4808148 (1989-02-01), Holtz
patent: 4886482 (1989-12-01), Koschmieder et al.
patent: 4917655 (1990-04-01), Martin
patent: 5186689 (1993-02-01), Yamamoto et al.
patent: 5186690 (1993-02-01), Yamamoto
patent: 5266067 (1993-11-01), Gapco

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