| 摘要 |
<p>A gearbox comprises an input shaft 9 having first and second helical input gears 1, 2 of opposite hand fixed axially relative to each other and axially moveable in tandem, an output shaft 10 and first and second lay shafts 7, 8 offset from an axis of the input shaft 9. Each lay shaft 7, 8 comprise an input gear 3, 4 such that the first lay shaft 7 engages with the first input gear 1 but not the second input gear 2 and the second lay shaft 8 engages with the second input gear 2 but not the first input gear 1. One or more output gears 26 are rotatably mounted on, and selectively engageable with via synchronizer 19, the output shaft 10, the output gears 26 being in continuous mesh with corresponding output gears 5, 6 on the first and second lay shafts 7, 8. The gearbox is configured such that an imbalance in load sharing between the input shaft 9 and the first and second lay shafts 7, 8 when the output shaft is engaged with the first and second lay shafts results in axial movement of the first and second input gears 1, 2 tending to reduce the unbalance.</p> |
