Electric disk brake

A disc brake, electric technology, applied in the direction of brake type, brake components, brake actuators, etc., can solve the problems of large-scale deceleration mechanism, can not meet the increase of output, etc., to achieve the effect of large thrust
CN101592199AActive Publication Date: 2009-12-02HITACHI LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HITACHI LTD
Publication Date
2009-12-02

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Abstract

There is provided with an electric disk brake which is a small sized and is able to obtain large braking block pressure and run stably. The electric disk brake drives a sun gear of a reducing mechanism (10)(satellite gear mechanism) by an output shaft (22) of an electric motor / control unit (9), drives a ball screw mechanism (11) through a first output gear (23) by the rotation of a satellite gearrack (20), drives a ball screw mechanism (12) through a second output gear (24) by the rotation of a gear ring (21), and generates braking force by pressing braking blocks (4, 5) to a disk rotor. Theelectric disk brack can obtain double output by leading both the satellite gear rack (20) and the gear ring (21) of the satellite gear mechanism comparing with the condition that one of the satellitegear rack (20) and the gear ring (21) is fixed and the other is output, in addition, using differential rotation, even if one of driving ball screw mechanisms (11, 12) is stuck caused by fault, whichcan generate braking force.
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Description

technical field

[0001] The invention relates to an electric disc brake, which generates a braking force by pressing a brake block to a disc rotor through an electric motor. Background technique

[0002] As an electric disc brake, it is known to convert the rotary motion of the motor rotor into the linear motion of the piston by using a rotary / direct motion conversion mechanism such as a ball screw mechanism and a ball slide mechanism, so that the brake pad moves in a circular motion. The disc rotor presses to generate braking force. The electric disc brake can generate a desired braking force by detecting the driver's brake pedal force (or displacement) and the like by a sensor, and controlling the rotation of an electric motor by a control device based on the detected value.

[0003] In such an electric disc brake, as disclosed in Patent Document 1, a reduction mechanism using a spur gear is interposed between the rotation / linear conversion mechanism and the electric motor...

Claims

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