Electromechanically actuable expanding device for a drum brake

US10151365B2 · kind B2 · utility

Assignee

• Continental Teves AG & Co. OHG · DE

Inventors

• Uwe Bach · Niedernhausen, DE
• Jens Hoffmann · Darmstadt, DE
• Martin Gädke · Hofheim, DE
• Holger von Hayn · Bad Vilbel, DE
• Ahmed Sefo · Frankfurt, DE
• Thorsten Lahr · Wiesbaden, DE
• Wolfgang Ritter · Düsseldorf, DE

Key dates

• Filing date: Dec 14, 2015
• Grant date: Dec 11, 2018
• Expiry date: Dec 14, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2125/40
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An expanding device for actuating one of the brake shoes of a drum brake includes a body of revolution and transmission bodies actuated by the body of revolution via ball track ramps. A spacer body is located between two partial bodies of the body of revolution, the spacer body guided by an adjustment spring keeping the partial bodies at the respectively reached distance. The spacer body is screwed onto a pin on the first partial body. A readjustment nut ensures that, when the two partial bodies are pushed apart, the spacer body rotates on the pin and moves away from a supporting surface on a partition of the second partial body. Upon renewed actuation of the brakes, the readjustment nut is guided such that the spacer body bears against the second partial body, but takes up a different position on the pin, the position corresponding to the air clearance readjustment.