US 6,325,182 B1Granted

Motor-driven brake system

AssigneeTokico Ltd.

InventorsTohma Yamaguchi, Youichi Kumemura, Yukio Ohtani, Takuya Usui

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Abstract

The present invention provides a motor driven brake system for generating and releasing braking forces by reciprocal movement of a pair of pads disposed at opposite sides of a disk having an axis. The system comprises a single electric motor, an output portion adapted to be rotated by the electric motor, a first pad pressing member for pressing a first pad against the disk a second pad pressing member for pressing a second pad against the disk, a first converting mechanism and second converting mechanism. The first converting mechanism converts rotation of the output portion to a linear motion so as to move the first pad pressing member reciprocally along the axis of the disk. The second converting mechanism converts rotation of the output portion to a linear motion so as to move the second pad pressing member reciprocally along the axis of the disk.

Claims25

Dependent claims

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;
and
a 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;
wherein
said 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.

7 more elements

A motor-driven brake system for generating and releasing braking forces by reciprocal movement of a pair of pads disposed at opposite sides of a disk having an axis, wherein the pads are arranged to move toward and away from the disk along the axis, said motor-driven brake system comprising:

a motor;
a caliper for housing said motor;
an output portion adapted to be rotatably driven by said motor;
a first pad pressing member for pressing the first pad against the disk;
a second pad pressing member for pressing the second pad against the disk;
a first converting device for converting rotation of said output portion to linear motion such that said first pad pressing member moves reciprocally along the axis of the disk;
and
a second converting device for converting rotation of said output portion to linear motion such that said second pad pressing member moves reciprocally along the axis of the disk;
wherein
said first pad pressing member and said second pad pressing member are separate from said caliper such that said first and second pad pressing members are each reciprocable relative to said caliper.

7 more elements

Dependencies are inferred from the claim text.