Hydraulically actuatable device for disengaging a gearshift clutch of an automotive vehicle

US5547058A · kind A · utility

Assignee

• INA-WALZLAGER SCHAEFFLER KG · DE

Inventors

• Walter Parzefall · Bubenreuth, DE
• Herbert Folk · Burghaslach, DE

Key dates

• Filing date: Mar 17, 1995
• Grant date: Aug 20, 1996
• Expiry date: Mar 17, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D23/14
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulically actuatable device (1) for disengaging a gearshift clutch of an automotive vehicle, having an annular piston (4) arranged for sliding displacement with its inner peripheral surface (9) on a guide sleeve (6) and its outer peripheral surface (13) in a clutch output cylinder (2), a release bearing (5) positionally fixed by a disc spring (20) being lodged in an end of the annular piston (4) away from a pressure chamber (8), characterized in that, there is arranged on end of the annular piston (4) a fixing ring (12) comprising a cylindrical portion (14) which engages around a part of the outer peripheral surface (13) of the annular piston (4) to which it is fixed by positive engagement, and a radially inwards oriented arm (17) of an inner ring (16) of the release bearing (5) engages into a portion (15,45) of the fixing ring (12) having a U- or L-shaped cross-section and extending beyond end of the annular piston (4), arm (17) of the inner ring (16) being urged by the disc spring (20) supported on a first annular radial portion (21) of the fixing ring (12) against a second annular radial portion (22) thereof which bears against an end face of the annular piston (4).