Patent ID: 8240445
Filing Date: 2012-08-14
Classification: F16D

Abstract:
1. A multiplate clutch comprising: a driving portion configured to be rotated by a driving force applied by a driving force generator; a driven portion configured to rotate an output shaft having an axial direction; at least one driving friction plate configured to be rotated by the driving portion; at least one driven friction plate provided to face the at least one driving friction plate and configured to rotate the driven portion; a pressure applying unit configured to apply a pressing force to the at least one driving friction plate and the at least one driven friction plate to transmit the driving force from the driving portion to the driven portion via the at least one driving friction plate and the at least one driven friction plate; a first cam unit comprising first concave-convex cams having spherically shaped portions and configured to increase the pressing force in accordance with an increase of the driving force; and a second cam unit configured to function as a back torque limiter mechanism and comprising second concave-convex cams which are different from the first concave-convex cams, the second concave-convex cams having spherically shaped portions, wherein the first and second cam units comprise: wherein the first concave-convex cams are integrally formed on each of opposing surfaces of the first cam plate and the second cam plate, respectively, and wherein the second concave-convex cams are integrally formed on each of opposing surfaces of the first cam plate and the third cam plate, respectively.