CLUTCH APPARATUS

摘要

A clutch apparatus includes a clutch outer, a clutch inner, driving friction plates, driven friction plates, a pressure receiving plate, a pressing plate, a movable cam member, a fixed cam member, clutch springs, and a swollen portion. The clutch outer is connected to an input power member. The clutch inner has a first ring plate portion extending along a plane perpendicular to an axial direction of an output power shaft and boss portions extending in the axial direction from the first ring plate portion. The clutch inner is connected to the output power shaft to rotate with the output power shaft. The driving friction plates are connected to the clutch outer. The swollen portion is provided at a base portion of each of the boss portions and swollen from opposite sides of each of the boss portions along a circumferential direction of the clutch inner.

主权项

1. A clutch apparatus, comprising:
a clutch outer connected to an input power member; a clutch inner having a first ring plate portion extending along a plane perpendicular to an axial line of an output power shaft and a plurality of boss portions extending in an axial direction from the first ring plate portion and connected in an interlocking relationship to the output power shaft; a plurality of driving friction plates configured to be engaged by the clutch outer; a plurality of driven friction plates disposed alternately with the driving friction plates and configured to be engaged by the clutch inner; a pressure receiving plate disposed in an opposing relationship to that one of the driving friction plates and the driven friction plates which is disposed at one end of the clutch inner along the axial direction and coupled to the clutch inner; a pressing plate cooperating with the pressure receiving plate to sandwich the driving friction plates and the driven friction plates therebetween; a movable cam member spline-coupled to the clutch inner against relative rotation but for axial movement; a fixed cam member fixed to the output power shaft so as to cooperate with the movable cam member to configure a cam mechanism and having a second ring plate portion which is opposed to the first ring plate portion and has a plurality of openings which are provided therein so as to allow the boss portions to penetrate the second ring plate portion therethrough; and a plurality of clutch springs provided between a spring receiving plate fixed to an end portion of the boss portions and the pressing plate and configured to bias the pressing plate so as to cooperate with the pressure receiving plate to contact the driving friction plates and the driven friction plates under pressure with each other therebetween; a swollen portion being provided integrally at a base portion of each of the boss portions in such a manner as to be swollen to opposite sides from the boss portion along a circumferential direction of the clutch inner such that, in a state in which a phase between the fixed cam member and the movable cam member is displaced from a correct phase, the swollen portion abuts with an end edge of the associated opening along a circumferential direction of the fixed cam member thereby to prevent insertion of the associated boss portion into the opening.