US 5,660,251 A · Vibration damping device for disc brake

Abstract

A vibration damping mechanism for use in a disc brake which can effectively suppress squeaks of the disc brake during braking. Vibrations of the rotor are detected by a piezoelectric element pressed against the back of an inner pad. The detection signal is inputted in a control circuit. The control circuit applies a control signal to another piezoelectric element which produces oscillations having a frequency that can reduce the detection signal to zero. The oscillations produced by the piezoelectric element are transmitted to the rotor to cancel the vibrations of the rotor. With this arrangement, signal components other than the rotor vibrations are scarcely contained in the detection signal, so that it is possible to produce oscillations that can cancel vibrations of the rotor with high accuracy. As a result, the rotor vibrations and thus squeaks of the disc brake are effectively suppressed.

Claims4

Dependent claims

A vibration damping device for a disc brake, said vibration damping device comprising:

a non-contact type vibration detecting means for directly detecting vibrations of a disc rotor without contacting the disc rotor and outputting a signal which is indicative of the detected vibrations;
a non-contact type oscillating means for generating oscillations to directly oscillate the disc rotor without contacting the disc rotor;
and
an oscillation control means for controlling said oscillating means based on an output signal received from said vibration detecting means so that oscillations generated by said oscillating means will cancel out vibrations of the disc rotor.

1 more element

Dependencies are inferred from the claim text.

Vibration damping device for disc brake

Life of this patent

Vibration damping device for disc brake

Life of this patent

Abstract

Claims4