Spreader unit for a motor vehicle drum brake

US12234875B2 · kind B2 · utility

Assignee

• Continental Automotive Technologies GmbH · DE

Inventors

• Martin Gädke · Hofheim, DE
• Holger von Hayn · Bad Vilbel, DE
• Matthias Schulitz · Frankfurt am Main, DE
• Ahmed Sefo · Frankfurt, DE
• Uwe Bach · Niedernhausen, DE
• Adrian Messner · Darmstadt, DE
• Wolfgang Ritter · Düsseldorf, DE
• Jens Hoffmann · Darmstadt, DE
• Christian Vey · Frankfurt am Main, DE

Key dates

• Filing date: May 27, 2020
• Grant date: Feb 25, 2025
• Expiry date: Dec 2, 2041

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2200/0004
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A spreader unit for a drum brake is provided with a readjustment device which ensures that the clearance remains substantially constant even in the case of wear on the brake linings. The readjustment device is arranged between actuating pistons and changes the spacing of the actuating pistons in at least one readjustment step when an actuating travel of the first and second brake shoe holders has exceeded a travel setpoint value. A thermally actuable blocking device mechanically prevents the execution of the readjustment step by the readjustment device at a temperature above a temperature setpoint value.