| 摘要 |
A coupling device for coupling rotatable bodies together that includes first and second rotatable bodies (1, 3 or 1, 5), a plurality of coupling members (19, 21, 28, 30) for selectively coupling the first and second rotatable bodies together to transfer drive between the rotatable bodies, and electro- magnetic actuator means (26) for controlling engagement of the coupling members. The invention also relates to a transmission system including the coupling device. The transmission system includes first and second drive shafts (1, 7), first and second gear sets (15, 17) mounted on the shafts for transferring drive between the shafts, each gear set including a first gear wheel (3, 5) mounted on the first shaft (1) for rotation relative to the fir st shaft said first gear wheel having a plurality of drive formations (19, 21), and a second. gear (9, 11) mounted on the second shaft (7) for rotation with the second shaft, selector means (13) for selectively transferring drive between the first shaft and either the first or second gear set including a plurality of engagement members (28, 30) for engaging the drive formations (19, 21), and electro -magnetic actuator means (26) for controlling engageme nt of the engagement members and the drive formations. |
