Pressure-medium actuated friction disk clutch or brake

US5090539A · kind A · utility

Assignee

• Zahnradfabrik Friedrichshafen AG · DE

Inventors

• Andreas Wolf · Munich, DE
• Harald Breisch

Key dates

• Filing date: Aug 22, 1989
• Grant date: Feb 25, 1992
• Expiry date: Aug 22, 2009

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D13/583
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pressure-medium actuated friction disk clutch or -brake is provided having a piston/cylinder actuation unit (1,2) and a disk spring (3) arranged between the piston (1) and a pressure plate (4) of the friction disk clutch, whereby the binding surfaces (11, 41) for the disk spring (3) are generally perpendicular to the axis (A) of the friction disk clutch. In order to influence a characteristic force curve (K1, K2) at the closing of the friction disk clutch (4, 5, 6, 7), at least one of the binding surfaces (11, 41), has a definitely shaped, radially extending contour (R1, R2, R4, 13) deviating from the right angle. Due to the modified angle of attack and the rolling off of the contact point of the disk spring on the binding surface and the therewith connected shortening of the lever arm (H), any desired pressure characteristic can be achieved with a normally built disk spring. Placing a contour at the binding surface of the piston (1) and/or the pressure plate (4) is simple and cost-effective.