ONE-WAY SYNCHRONIZER

摘要

ONE-WAY SYNCHRONIZER A gear transmission has a one-way synchronizer comprising a guide hub that is an integral part of a geared input member, and a shift sleeve that slides axially on the guide hub from a central neutral position either to an extended engaged position or to a retracted disengaged position. The synchronizer further comprises a plurality of circumferentially spaced struts that are disposed between the guide hub and the shift sleeve so that the struts slide axially with respect to the guide hub and the shift sleeve, and detents operatively connecting the struts to the shift sleeve when the shift sleeve is in the central neutral position so that struts follow the shift sleeve when it slides axially with respect to the guide hub until forces applied to the struts exceed a predetermined limit. The synchronizer further includes an output member and a blocker ring that is disposed between the guide hub and clutch teeth of the output member. The blocker ring has axial drive slots for indexing the blocker ring circumferentially with respect to the output member. The struts have depending tabs at one end that are disposed in the drive slots. The depending tabs have a dual function acting as drive lugs for indexing the blocker ring circumferentially with respect to the output member and also as stops that engage the input member to limit axial translation of the struts with respect to the guide hub when the shift sleeve is retracted from the extended engaged position.