Patent ID: 8220594
Filing Date: 2012-07-17
Classification: F16D

Abstract:
1. An electric brake device comprising: a braking member for being pressed against a brake rotor; a caliper holding the braking member; a pressing member connected to the braking member; an electric motor attached to the caliper; a reduction mechanism having one input element and first and second output elements for receiving an input rotation from the electric motor at the one input element and for transmitting the input rotation to the first and second output elements at reduced speeds; a rotation-linear motion converting mechanism connected to the first output element of the reduction mechanism for converting the rotation of the first output element into a linear motion of the pressing member when the electric motor is rotated in a positive-going direction; and a thrust force support member connected to the second output element of the reduction mechanism and screw-engaged with the caliper; wherein the rotation-linear motion converting mechanism is supported by the thrust force support member to be movable together in a thrust direction and is provided with rotation limiting means that limits the rotation of the first output element to a predetermined range to transmit the rotation of the one input element to the second output element when the electric motor is reversely rotated in a direction opposite to the positive-going direction; and wherein the thrust force support member is set to be greater in resistance to operation than the rotation-linear motion converting mechanism.