Torque transmission device.

摘要

A torque transmission device 10 coaxially arranged between a pair of rotary shafts 25,26 transmits rotational torque in response to relative rotation therebetween. This device 10 includes an outer cylindrical housing 11 coupled to one of the rotary shafts 25 for rotation therewith, wherein the outer cylindrical housing 11 receives an inner sleeve shaft 13 coupled to the other of the rotary shafts 26 for rotation therewith, and multiple friction disc clutch 10b which transmits rotational torque between the inner sleeve shaft 13 and the outer cylindrical housing 11. In the torque transmission device 10, there are also an actuation piston 14 making the multiple friction disc 10b clutch be in engagement and a pressure generating mechanism generating a pressure according to the relative rotation between the outer cylindrical housing 11 and the inner sleeve shaft 13 to make the actuation piston 14 move toward the clutch. Further, the torque transmission device 10 has a pressure controlling mechanism which controls the pressure in the clutch chamber R1 receiving the clutch so that the characteristic of the torque transmission device 10 is changed. <IMAGE>