Roller synchro mechanism

摘要

A retainer (13a) retaining a plurality of rollers (12a) therein for slight movement in a radial direction is disposed between cam grooves (10a1) in the outer periphery of an inner cam (10a) secured to a rotary shaft (1) and a roller abutment surface (3a2) around an inner periphery of a gear (3a) relatively rotatably carried on the rotary shaft (1). A dowel-admission groove (13a2) is defined in a side of the retainer (13a), so that a dowel (8a) of a sleeve (8) can enter the dowel-admission groove (13a2). The dowel admission groove (13a2) is defined between the adjacent rollers (12a) retained in the retainer (13a), or at least portions of the inner cam (10a), the rollers (12a) and the retainer (12a) are disposed in a recess made in the gear, thereby permitting a reduction in axial dimension of a roller synchro mechanism.