Frictional resistance coupling

US5156480A · kind A · utility

Assignee

• J.M. Voith GmbH · DE

Inventor

• Ernst Elsner · Herbrechtingen, DE

Key dates

• Filing date: Jun 17, 1991
• Grant date: Oct 20, 1992
• Expiry date: Jun 17, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T403/20
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a frictional resistance coupling for transmitting torque between two coaxial components, for example a shaft with an articulated shaft, the coupling comprises an outer part and an inner part, which enclose an inner chamber with a conical wall. Inserted to move axially in the inner chamber is an annular piston of the same conicity, so that when the annular piston moves axially by means of a pressure medium, a radial clamping force and thus frictional resistance for transmitting torque is produced. The pressure chambers located on both sides of the annular piston in each case comprise a further connection to a low pressure source. The pressure chamber respectively not supplied with high pressure is supplied with pressure medium from a low pressure source during the displacement process and when the piston reaches the end position within the inner chamber, the opening of the low pressure passage is closed by the end face of the piston. Thereupon a higher pressure builds up in the low pressure supply line and a sensor apparatus emits a signal at the time of a corresponding pressure, which is an indication that the annular piston has definitively reached its end…