ACIONAMENTO POSITIVO

摘要

A positive drive having a housing (10) retaining a pair of spaced drive clutches (54) and (56) used to lock axles (18) and (20) respectively to housing (10) for one-to-one rotation. The clutches move from the engaged to the disengaged mode via axial movement of drive couplings (30) and (32) which are forced to the respective engaged positions by a shaft (48) secured for rotation with the housing. The shaft acts on cams (38) and (40) on the drive couplings to cause rotational and axial movement of the couplings. Rotational movement of one drive coupling relative to the other drive coupling is prevented by a balking clamp (76). The clutches (54) and (56) are inserted within the housing through a window (14). The axles are retained by <> clips (80) contacting spline couplings (26) and (28).