| 摘要 |
PURPOSE: To carry out certain gear speed change by actuating an interock during shift motion of an auxiliary speed change part and prohibiting shift motion of a main speed change part until its range shift is completed. CONSTITUTION: A shift bar housing assembly 56 of a transmission carries out shift motion of a main speed change part by engaging tub members 118, 120 with a shift block member 122 or 130 by right or left revolution of a control shaft 100 and moving a shift bar 96 or 98. At this time, simultaneous movement of the shift bars 96, 98 is prevented by an interlock mechanism 108. In the meantime, at the time of carrying out range change at an auxiliary speed change part, the control shaft 100 is positioned at a revolution neutral position, the shift tub members 118, 120 are conformed to grooves in the circumferential direction of the shift block members 122, 130, an interlock plunger 180 is pressed and elastically-locked by a range interlock lateral shaft 182 at that position, and shift of the main speed change part is prohibited. Consequently, it is possible to carry out certain gear speed change. |
