Patent ID: 7845480
Filing Date: 2010-12-07
Classification: F16D

Abstract:
1. A frictional coupling device support structure, comprising: a snap ring that fits in a groove extending in a circle about a predetermined axis; a friction plate, the position of which is restricted by the snap ring in a direction in which the predetermined axis extends and which is pressed against the snap ring in the direction in which the predetermined axis extends; and a plate member that is provided between the friction plate and the snap ring and that is pressed against the snap ring, wherein the snap ring has a first end face that faces the plate member and a second end face that face the opposite side from the first end face in the direction in which the predetermined axis extends and is in contact with a sidewall of the groove, the plate member includes a third end face that is in contact with the first end face, a static friction coefficient between the first end face and the third end face is smaller than a static friction coefficient between the second end face and the sidewall of the groove and the second end face is rougher than the first end face.