Clutch switching device and twin-clutch type transmission comprising clutch switching device

A clutch switching device for selectively engaging a first clutch of a first input shaft, which is rotatably supported by a case, and a second clutch of a second input shaft that is disposed coaxially with an outside peripheral side of the first input shaft, and is rotatably supported by the case, the clutch switching device comprising:

• a fixed sleeve having a hollow shaft portion with a first male thread on an outside peripheral surface, the fixed sleeve being configured to be fixedly mounted on the case such that the hollow shaft portion is coaxially arranged on the outside periphery of the second input shaft;
• a first slider having a first female thread on an inside peripheral surface and a second male thread on an outside peripheral surface, the first female thread being threadedly engaged with the first male thread, the first slider being threadedly engaged with the fixed sleeve, being rotatable with respect to the fixed sleeve and being movable in the axial direction;
• a second slider having a second female thread on an inside peripheral surface, the second female thread being threadedly engaged with the second male thread, the second slider being threadedly engaged with the first slider, being rotatable with respect to the first slider and being movable in the axial direction;
• a first release bearing member interposed between the second slider and a first clutch member constituting a part of the first clutch;
• a second release bearing member interposed between the first slider and a second clutch member constituting a part of the second clutch;
• and
• an actuator arranged to rotate the first slider and the second slider.