Patent ID: 6773367
Filing Date: 2004-08-10
Classification: A01D,A01F,F16H

Abstract:
A shift mechanism for a belt drive, comprising:a shaft rotatable about an axis therethrough including a first pulley mounted on the shaft for rotation therewith; a tube concentric with the shaft and rotatable around the shaft and the axis, the tube including a shift hub mounted around a portion thereof for rotation therewith, the shift hub supporting a second pulley in axially spaced relation to the first pulley for concentric rotation about the shift hub; and a collar mounted in telescopic relation to the shift hub in the space between the first pulley and the second pulley for rotation with the shift hub and for axial movement relative thereto between a first position adjacent the first pulley and a second position adjacent the second pulley, the collar and the first pulley including elements cooperatively engageable when the collar is in the first position for connecting the collar to the first pulley for rotation of the collar, the shift hub and the tube therewith, and the collar and the second pulley including elements cooperatively engageable when the collar is in the second position for connecting the collar to the second pulley for rotation of the collar, the shift hub, and the tube therewith.