| 摘要 |
A mainshaft assembly for a gearbox is disclosed. The mainshaft (44) comprises several gears (30, 32, 34, 36) all arranged coaxially on the mainshaft. The assembly comprises first and second hubs (50, 52), each being associated with a respective drive gear. The hubs having dog rings (54, 56) operable to selectively couple with the drive gear. A drive connection comprising a cage (42) and rollers (60) is associated with each hub and operative to connect or disconnect the hub to the mainshaft. Upon connection of first and second hub by their dog rings, the drive connection connects one of the hubs the mainshaft when torque is applied to the mainshaft in a first direction. When torque is applied in opposite direction the second hub engages the mainshaft. This enables selection of gear without delay during engagement and disengagement of drive gears. |
