Device for testing trailer couplings under loading conditions resembling those occurring in use, preferably with inclusion of the construction for fixing the trailer coupling

US5024102A · kind A · utility

Assignee

• FRAUNHOFER-GESELSCHAFT · DE

Inventors

• Jurgen Klock · Otzberg, DE
• Gerhard Fischer · Darmstadt, DE
• Vatroslav Grubisic · Reinheim, DE

Key dates

• Filing date: Nov 3, 1989
• Grant date: Jun 18, 1991
• Expiry date: Nov 3, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M99/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention provides a device for testing trailer couplings which transmit a traction to a trailer by way of a trailer coupling ring on the drawbar of the trailer, the test being carried out under loading conditions similar to those occurring in practice, preferably with inclusion of the construction for fixing the trailer coupling, in particular the tail cross-member to which the trailer coupling is attached and optionally frame parts adjoining the tail cross-member. A longitudinal force generating device which produces a longitudinal force acting in the direction of traction of the connection between the trailer coupling and the trailer coupling ring and a vertical force generating device which produces a vertical force extending perpendicularly or approximately perpendicularly to the direction of action of the traction are coupled to a force transmitting connecting member to which can be attached the trailer coupling ring which is connected to the trailer coupling. The parts are coupled together in such a manner that the direction of action of the vertical force exerted on the force transmitting connecting member by the vertical force generating device and the direction of act…