| 摘要 |
PURPOSE:To restrain sobbing vibration upon stopping from running, by absoring rotational vibration in the vicinity of the neutral position of a stepless speed change gear unit with the use of a double-acting fluid pressure cylinder for shifting the stepless speed change gear unit. CONSTITUTION:A foot padal 12 is associatingly coupled to a control arm 8 of a stepless speed change unit 7 through the intermediary of a push-pull link 12, a swingable associating member 10 and a pedeal rotary shaft 11, and is operated to swing the above-mentioned control arm 8 between its forward side F and its backward side B, A passage 17 provided therein with a constriction and communicating a pair of cylinder side ports with each other is formed in the neutral position (n) of an electromagnetically operated control valve 16 for controlling a double-acting fluid pressure cylinder 15 which is associated with the control arm 8. The above-mentioned control valve 16 is automatically turned to its neutral position (n) when the stepless speed change gear unit 7 comes around its neutral position, so that vibration induced by the internal pressure of the stepless speed change gear unit 7 is retrained. |
