Electrical actuation mechanism suitable for a disc brake assembly

US5931268A · kind A · utility

Assignee

• KELSEY-HAYES-COMPANY · US

Inventors

• Andrew W. Kingston · Rhens, DE
• Robert L. Ferger · Homburg, DE
• Thomas Weigert · Pocking, DE
• Salvatore Oliveri · Filsen, DE
• Leonard T. Tribe · Ann Arbor, US
• Herbert L. Linkner, Jr. · Dexter, US

Key dates

• Filing date: Feb 14, 1997
• Grant date: Aug 3, 1999
• Expiry date: Feb 14, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2127/06
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An improved structure for an electrical actuation mechanism adapted for use in a disc brake assembly includes an electrical actuation mechanism adapted to be secured to an inboard leg of the caliper of the disc brake assembly. The electrical actuation mechanism includes a housing, an electrical motor disposed in the housing, and a spindle disposed in the housing and operatively coupled to the motor by a conversion gear assembly which is effective to convert rotary motion generated by the motor into axial movement of the piston. The spindle includes a shaft and a piston which can be coupled to the shaft by a dampening structure. The shaft is operatively connected to the motor for axial motion thereof, and the piston is operatively connected to a friction pad for engaging a rotor attached to a wheel of a vehicle in which the disc brake assembly is installed. The dampening structure can be comprised of elastomeric material or a fluid filled chamber defined between the piston and the shaft. The dampening structure reduces the radial loads acted upon the piston from being transmitted to the shaft. The electrical actuation mechanism may also be equipped with sensors for sensing the axial…