| 摘要 |
The disclosure relates to a rotary drag/damper device for controlling rotation of one rotary member (10) with respect to another (11; 13) about a first axis of rotation. The device includes a rotary viscous coupling (40) which slips when subjected to a torque with a resistance to slippage which rises progressively with respect to speed of rotation and a rotary friction coupling (61, 70, 43) arranged in series with the viscous coupling and which transmits torque without slippage in a torque transmitting direction up to a certain level at above which the friction coupling slips with the resistance which does not change significantly with speed. The coupling includes an arrangement (40, 47, 50) to generate slippage in the friction coupling in a direction transverse to the torque transmitting direction with slippage in the viscous coupling to provide a smooth transition when the torque rises above said certain level which causes slip of the friction coupling in the torque transmitting direction. |
