Device for testing trailer couplings under loading conditions re

Details Device for testing trailer couplings under loading conditions re Device for testing trailer couplings under loading conditions re

1989-11-03

1991-06-18

Ruehl, Charles A.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

738659, G01N 310

Patent

active

050241028

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 action of the longitudinal force exerted on the force transmitting connecting member by the longitudinal force generating device intersect at the point at which the trailer coupling ring is attached to the trailer coupling.

REFERENCES:
patent: 3696663 (1972-10-01), Klinger
patent: 3713330 (1973-01-01), Lentz
patent: 4133201 (1979-01-01), Klinger

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