Patent ID: 8678153
Filing Date: 2014-03-25
Classification: F16D,Y10T

Abstract:
1. A twin-clutch device comprising: a first rotating member, a second rotating member, and a third rotating member, wherein the twin-clutch device selectively transmits torque from the first rotating member to any one of or both of the second rotating member and the third rotating member, the second rotating member and the third rotating member are arranged respectively on both sides of the first rotating member, a functional fluid fills gaps between the first rotating member and the second rotating member and third rotating member, wherein the functional fluid decreases flowability of the functional fluid as a stimulus applied to the functional fluid is increased, and increases flowability of the functional fluid as the applied stimulus is reduced, a stimulus generating member is provided for the first rotating member, and is electrically controlled to generate the stimulus, and flowability of the functional fluid between the first rotating member and one of the second rotating member and the third rotating member is decreased with an increase in stimulus applied to the functional fluid by the stimulus generating member to couple the first rotating member to the one of the second rotating member and the third rotating member via the functional fluid of which the flowability is decreased, whereby allowing torque to be transmitted between the first rotating member and the one of the second rotating member and the third rotating member, the functional fluid includes a magnetic fluid that increases shearing coefficient of the magnetic fluid or shearing force of the magnetic fluid as the magnetic fluid is magnetized, the stimulus generating member includes an electromagnet, and a permanent magnet is provided for one of the second rotating member and the third rotating member at a portion facing the electromagnet, and a magnetic material is provided for the other one of the second rotating member and the third rotating member at a portion facing the electromagnet.