Continuously variable belt drive system

Details Continuously variable belt drive system Continuously variable belt drive system

2005-11-08

2005-11-08

Charles, Marcus (Department: 3682)

Endless belt power transmission systems or components

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

By manual actuator for one or both confronting members

C474S014000, C474S026000, C474S037000

Reexamination Certificate

active

06962543

ABSTRACT:
A continuously variable belt drive system includes a driving pulley assembly, a driven pulley assembly and a V-shaped belt engaged to transfer rotary power therebetween. The driven pulley assembly includes a ratio adjustment mechanism that adjusts the position of a rear sheave relative to a forward sheave. The adjustment mechanism includes a motor and a worm gear mechanism that rotates an actuation screw. Rotation of the actuation screw is reacted by a split nut that translates the screw rotates along the axis of the driven pulley assembly. In one feature, the driven pulley assembly includes a fail-safe mechanism that operates when power is supplied to the motor to hold the split nut together. In another aspect of the invention, the driving pulley assembly includes a belt tensioning mechanism that maintains proper belt tension at all speeds and drive ratios.

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