TOROIDAL TYPE VARIABLE-SPEED DRIVE

摘要

PROBLEM TO BE SOLVED: To reduce the bending stress generating in a trunnion and increase the allowable transmission capacity by enlarging the arc radius of the connection part for the outer peripheral face of the trunnion shaft and the outside end face of the main part. SOLUTION: The outer ring 11 of a needle bearing 10 fitted in the shaft 4 of a trunnion 1 has integrally a collar 11a holding a needle 12 only at the opposite end of the opposite side end to the outer side end face of the main part 3 of the trunnion 1, and a washer 15 is inserted between the needle bearing 10 and the outside end face of the main part 3 of the trunnion 1. The outer peripheral face of the shaft 4 of the trunnion 1 and outside end face of the main part 3 are positioned oppositely to each other apart from the arc face of the connection part A where they cross mutually and a chamfering process 16 avoiding the contact with the arc face is executed, and a guide part 17 coming into sliding contact with the shift 4 of the trunnion 1 is formed.