Stepless speed variator of a belt type

Details Stepless speed variator of a belt type Stepless speed variator of a belt type

1988-11-29

1989-11-21

Bui, Thuy M.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

And pulley shiftable laterally of its axis of rotation

474 13, 474 28, F16H 912

Patent

active

048819263

ABSTRACT:
Rotation speed of automotive auxiliary machines is controlled by a drive pulley provided on a crank shaft and a driven pulley communicating with the drive pulley through a V-belt. The drive pulley comprises a rigid pulley secured on a drive shaft, a guide holder to be rotated together with the drive shaft by a mount bolt, and a slide pulley axially-movably located between the guide holder and the rigid pulley. The slide pulley provides a power piston to be moved along a guide holder shaft. The power piston, the guide holder flange, and the slide pulley define a power piston chamber.
Inside of the power piston chamber are located a flyweight to be moved by centrifugal force and a servo valve to be axially moved by the flyweight. The servo valve is fitted on the outer peripheral surface of the power piston. The engine oil, supplied from an oil pan to the drive shaft, is conducted from a mount bolt into a power piston chamber through a power piston and a servo valve and conversely is returned from the power piston chamber to the oil pan through the passage on the outer peripheral surface of the mount bolt depending upon the action of the servo valve.

REFERENCES:
patent: 4406644 (1983-09-01), Kinbara et al.
patent: 4583423 (1986-04-01), Hahne
patent: 4608032 (1986-08-01), Stockton et al.
patent: 4673379 (1987-06-01), Ohzono et al.

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