| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the excess rotation even when a torque is applied from a rotary member side. SOLUTION: A snap ring mount device comprises a snap ring 73 having an aperture 73a formed by notching a part of an annular main body, and an annular engagement groove 16h formed on a rear cover 16, the snap ring is mounted in the engagement groove, and a friction board 72 on which the pressing force is acted, is prevented from slip-off and held by the snap ring. The annular engagement groove 16h comprises a spline groove (a) formed by notching a side wall which carries the pressure force acting on the snap ring. A projection 73c is integrally formed on the main body of the snap ring, and the projection 73c is engaged with the spline groove (a) so that an end part of the main body 73b on which the aperture 73a is formed, is located on a position of a side wall of the engagement groove 16h.</p> |
