| 摘要 |
<p>An apparatus for selection and engagement of selectable gear ratios in a change speed transmission is disclosed. The apparatus comprises a housing (H), a shaft (106) mounted for relative axial and rotational movement in the housing, a plurality of shift forks (60A, 62A, 64A), and a plurality of snap rings (135, 136, 137, 144, 145, 146). Each of the shift forks includes a hub portion (118, 120, 122, 147, 148, 149) having a bore (124, 126, 128) through which the shaft is received. Each of the snap rings is disposed about the shaft and abuts a corresponding shift fork. Each of the snap rings has a tooth (138, 139, 140, 150, 151, 152) which projects radially from the shaft. Each of the hub portions has a groove (176, 180, 182, 186) which is formed to receive a corresponding tooth such that when one of the grooves is not aligned with a corresponding tooth in response to rotation of the shaft, the other grooves are aligned with a corresponding tooth. Thus, only one shift fork is movable at any time. <IMAGE> <IMAGE></p> |
