| 摘要 |
<p>A bias mechanism (65) includes a plunger (226) secured within a bore (220) extending in a generally tangential direction through a shift fork hub and intersecting a transverse aperture for mounting the hub on a shift shaft (204), the plunger having a portion (228) protruding through the bore to selectively contact either the shift shaft or a shifting key or pin during rotation of the shift shaft, and a spring (250) to provide resistance to movement of the plunger within the bore thereby causing rotational resistance to the shift shaft while eliminating axial resistance or drag during translation of the shift shaft. In one embodiment, the plunger contacts a shifting element fixed to the shift shaft, such as a shifting key or pin (214). In another embodiment, the plunger contacts the shift shaft directly but only during selection of the biased shift yoke for translation to engage a particular gear. The plunger preferably includes flats or conical portions which exert a force which tends to return the shift shaft to a neutral position within a first range of rotation, but maintains the position of the shift shaft within a second range of rotation. <IMAGE></p> |
