Patent ID: 6325182
Filing Date: 2001-12-04
Classification: B60T,F16D

Abstract:
A motor-driven brake system comprising:a first pad and a second pad disposable at axially opposite sides of a disk, wherein each of said first and second pads has two opposite facing surfaces, with one of said two opposite facing surfaces of each of said first and second pads being adapted to abut against the disk;a caliper for applying a force to the other of said two opposite facing surfaces of each of said first and second pads such that said one of said two opposite facing surfaces of each of said first and second pads abuts against the disk, with said caliper including a housing that is capable of being mounted on a non-rotatable portion of a vehicle body;a motor contained in said housing;an output portion adapted to be rotatably driven by said motor;a converting device for converting rotation of said output portion to linear motion, with said converting device including a first threaded portion and a second threaded portion which have a directionally reverse relationship with one another;a first pad pressing member to be disposed at one of the axially opposite sides of the disk and having a first end engaged with said first threaded portion, and also having a second end capable of applying a force to the other of said two opposite facing surfaces of said first pad; anda second pad pressing member to be extended across an outer periphery of the disk and having a first end engaged with said second threaded portion, and also having a second end capable of applying a force to the other of said two opposite facing surfaces of said second pad; whereinsaid first pad pressing member and said second pad pressing member are separate from said caliper such that said first pad pressing member and said second pad pressing member are linearly reciprocable along the axis of the disk relative to said housing, so that one of said first and second pad pressing members is movable in a direction that is opposite to the direction in which the other of said first and second pad pressing member is movable.