Patent ID: 6279691
Filing Date: 2001-08-28
Classification: F16D

Abstract:
An electric braking device comprising a force transmitting and converting mechanism for pushing a rotating member by a drive force generated by an electric motor, said force transmitting and converting mechanism including:a gear rotated by the electric motor;a nut disposed being opposed to the gear;a rotating body disposed between the gear and the nut;a ramp mechanism operated so that the gear and the nut can be separated from each other by a relative rotation of the gear with the nut;a screw member screwed to the nut and not rotated; anda brake element being capable of coming into contact with the screw member,wherein the ramp mechanism integrally rotates the gear and the nut when the brake element comes into contact with the rotating member by a pushing force less than a predetermined value, and the ramp mechanism allows the gear and the nut to rotate relatively with each other when the brake element comes into contact with the rotating member by a pushing force not less than the predetermined value, so that the nut can be moved in a direction of the rotating member.