Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Speed responsive
Patent
1991-01-17
1992-04-28
Bui, Thuy M.
Endless belt power transmission systems or components
Pulley with belt-receiving groove formed by drive faces on...
Speed responsive
F16H 6100
Patent
active
051083477
ABSTRACT:
A driving pulley of a variable speed transmission having a drive shaft and two coaxial cheeks facing one another and defining a v-shaped groove which receives a trapezoidal belt. One of the cheeks is axially movable relative to the other cheek and has two housings distributed around its axis. The housings have a linear oblique ramp secured thereto and side wings which act as radial translation guides for inertia blocks which bear against the ramps and against a reaction cup attached to a hub of the driving pulley. The movable cheek is made solid in rotation with the drive shaft by a rubber membrane having a bow shape which is connected to the reaction cup. As the drive shaft rotates, the inertia blocks are subject to centrifugal forces which cause the movable cheek to move toward the other cheek. A return spring provides a force opposing the movement of the movable cheek.
REFERENCES:
patent: 3230787 (1966-01-01), Siegal
patent: 3659470 (1972-05-01), Beaudoin
patent: 4515575 (1985-05-01), Kinbara et al.
patent: 4608030 (1986-08-01), deBriel
Bui Thuy M.
Powerbloc IBC Canada Inc.
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