SHEAVE FOR V-BELT VARIATOR Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: conical disk 2 is secured to shaft 1. Disk 3 id mounted for axial and periphery movement with respect to shaft 1 and coupled with additional cam bushing 9 through key 10. The bushing engage with main cam bushing 7 through the cams. Bushing 7 is coupled with shaft 1 through key 8. Main pressing spring 5 is interposed between disk 3 and bushing 7. Additional spring 6 is interposed between bushing 9 and thrust washer 11. At overloading, bushing 9 moves to the left under the action of axial reaction on the cams and is set in friction contact with thrust washer 11. As the result a portion of the torque which is transmitted to disk 3 through bushing 7 decreases and hence the overloading also decreases. EFFECT: enhanced longevity. 1 dwg