Patent ID: 8292054
Filing Date: 2012-10-23
Classification: F16D

Abstract:
1. A double clutch comprising: an input shaft; a first output shaft, one end portion of which is disposed in the input shaft and aligned coaxially with the input shaft; a second output shaft enclosing an outer circumference of the other end portion of the first output shaft and aligned coaxially with the first output shaft; a first clutch pack disposed between the first output shaft and the input shaft so as to selectively engage the first output shaft and the input shaft; a second clutch pack disposed between the second output shaft and the input shaft so as to selectively engage the second output shaft and the input shaft; an electromagnetic actuator disposed between the first clutch pack and the second clutch pack; a first permanent magnet slidably disposed between the first clutch pack and the electromagnetic actuator and a second permanent magnet slidably disposed between the second clutch pack and the electromagnetic actuator, wherein the same poles of the first and second permanent magnets face the electromagnetic actuator at both sides of the electromagnetic actuator; a first ball ramp operating the first clutch pack to engage the input shaft and the first output shaft as the first permanent magnet is magnetically coupled with the electromagnetic actuator; and a second ball ramp operating the second clutch pack to engage the input shaft and the second output shaft as the second permanent magnet is magnetically coupled with the electromagnetic actuator.