Patent ID: 6571921
Filing Date: 2003-06-03
Classification: B60T,F16D,H02K

Abstract:
A motor-driven disk brake comprising:a pair of brake pads disposed at both sides, respectively, of a disk rotor; a piston provided in a caliper body to face one of said pair of brake pads; a claw portion provided on said caliper body to extend over said disk rotor so as to face the other of said pair of brake pads; an electric motor for rotating a rotor; and a rotary-to-rectilinear motion converting mechanism for converting rotational motion of said rotor into rectilinear motion to move said piston forward or backward, wherein a torque generated on the rotor by an operation of said electric motor is converted into thrust for said piston through said rotary-to-rectilinear motion converting mechanism to press said brake pads against said disk rotor, thereby generating braking force; said motor-driven disk brake further comprising: rotation assisting means for transmitting an external input directly to said rotor to rotate said rotor through a predetermined angle in a direction such that said piston is propelled, said rotation assisting means allowing said rotor to rotate in excess of said predetermined angle.