| 摘要 |
<p>A hub clutch in which when an axle shaft commences to be driven, protruding cam portions of a first cam which is axially movably splined to the outside circumference of a driving gear formed integrally with the axle shaft is displaced from the inside of respective grooved cam portions of a second cam and a cam ring to the outside along an axial direction. Thereafter, the first cam is further displaced to the outside in the axial direction along a second cam portion of the cam ring, and a clutch ring is displaced in the direction of clutched engagement through a shift spring, at which a casing is engaged integrally with the driving gear. As a mechanism for maintaining the clutched engagement (locked up state), such members as described above receive a return spring load and are provided for maintaining braking the cam ring which is in contact with the second cam and its stationary system, and at the same time the locked up state derived from the above members is effectively utilized, so that there is no need of an individual mechanism for maintaining on load on the cam ring.</p> |
