VARIABLE SPEED ACCESSORY DRIVE

摘要

A variable speed drive mechanism includes a fixed disk concentric with, attached to, and rotatable with a shaft about a central axis. A plurality of pulley segments are supported by the fixed disk, and are moveable relative to the fixed disk in a radial direction relative to the central axis. A moveable disk is concentric with the shaft, and is rotatably moveable about the shaft relative to the fixed disk. The moveable disk defines a spiral groove having a center concentric with the shaft. The pulley segments include a guided groove portion engaged with and moveable along the spiral groove. Rotation of the moveable disk relative to the fixed disk rotates the spiral groove about the central axis relative to the pulley segments, thereby moving the guided groove portions along the spiral groove to move the pulley segments radially relative to the central axis.

主权项

1. A variable speed drive mechanism comprising:
a shaft extending along a central axis; a fixed disk concentric with and attached to the shaft, and rotatable with the shaft about the central axis; a plurality of pulley segments supported by the fixed disk and moveable relative to the fixed disk in a radial direction relative to the central axis; a moveable disk concentric with the shaft and rotatably moveable about the shaft relative to the fixed disk, wherein the moveable disk defines a spiral groove having a center concentric with the shaft on the central axis; wherein each of the plurality of pulley segments includes a guided groove portion engaged with and moveable along the spiral groove, such that rotation of the moveable disk about the shaft and relative to the fixed disk rotates the spiral groove about the central axis relative to the plurality of pulley segments, thereby moving the guided groove portion of each of the plurality of pulley segments along the spiral groove to move each of the plurality of pulley segments radially relative to the central axis.