Patent ID: 8348038
Filing Date: 2013-01-08
Classification: F16D

Abstract:
1. A disk friction clutch apparatus using a self-energizing effect comprising: a drive friction disk connected to a drive shaft and rotated by the drive shaft; a driven friction disk connected to a driven shaft to axially move with respect to the driven shaft and configured to receive torque from the drive friction disk to transmit the torque to the driven shaft at an engagement position of the clutch; a push member connected to the driven shaft to be rotated about the driven shaft and move in an axial direction thereof, and configured to press the driven friction disk against the drive friction disk at the engagement position of the clutch; and a self-energizing operation unit configured to rotate the push member at a release position of the clutch in a first rotation direction and move the push member toward the driven friction disk in the axial direction to return the push member to the engagement position of the clutch, and to increase a force of the push member against the driven friction disk when the push member at the engagement position of the clutch is pressed to rotate in the first rotation direction from the driven friction disk, wherein the self-energizing operation unit includes: an operation disk configured to restrain axial movement with respect to the driven shaft and to allow rotation thereof; a plurality of first rack gears provided on a circumference having a predetermined radius from a center of the operation disk to form a surface inclined with respect to a surface of the operation disk facing the push member; a plurality of pinions engaged with the first rack gears to move along the inclined surface of the first rack gears; a plurality of second rack gears provided on a circumference having a predetermined radius from a center of the push member to form a surface to inclined with respect to a surface of the push member facing the operation disk, which is parallel to the inclined surface of the first rack gears, and engaged with the pinions, respectively; and a driver configured to rotate the operation disk.