| 摘要 |
PROBLEM TO BE SOLVED: To suppress sliding of a coned disc spring and an input disk for preventing abrasion by arranging an energizing means coaxially with input/ output disks, interposing an elastic member between a back surface of the other disk and a fastening member, and restricting a displacement toward the elastic member side at a predetermined position. SOLUTION: A spacer 50 is arranged between an input disc 1b as a restricting member and a flange part 30a of a nut 30, and is engaged with an outer periphery of a collar 40 at an inner circumference to insert a pair of coned disc springs 9 in an outer periphery. In the pair of coned disc springs 9, an inner circumferential side of the coned disc spring 9a faced to the input disc 1b abuts on a back surface of the input disc 1b at the outer periphery from a counterbore part 15, and the abutting position is set as an A point. An axial direction size L of the spacer 50 is set so as to execute restriction by making an end surface 50a of the spacer 50 abut on an end surface of the counterbore part 15 before a space S between the coned disc springs 9a, 9b is set to 0 and they are tightly fitted to each other by change of a tilting rotation angle of a power roller.
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