摘要:
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.
摘要:
The invention provides a process and an apparatus for testing commercial icle axles and/or springs and/or components adjacent thereto under load conditions resembling those occurring in practice. An entire commercial vehicle axle with two commercial vehicle springs and original attachment parts are tested by the introduction of low frequency deformations of vertical forces into a supporting assembly and of lateral forces, longitudinal forces and high frequency vertical wheel forces in each case into a wheel substitute or wheel or a brake force transmitting lever. In the course of this test, the supporting assembly is tilted about a pivot shaft or pivot axis which is displaceable in the vertical direction so that the axle of the commercial vehicle remains parallel to the horizontal. Vertical spring excursions and tilting of the supporting assembly are brought about by two vertical force generators which act on the supporting assembly and produce forces of reaction at the point of contact of the wheel tread with the vertical support. For testing the springs of the commercial vehicle alone, only one lateral force generator is used instead of two; and for the introduction of braking and driving forces and/or longitudinal forces, only one braking and driving force generator is used instead of two and, respectively, only one longitudinal force generator instead of two. The single force generator then acts at the center of the axle by way of a force transmitting means which is fixed to the right and the left wheel substitute or the right and left brake force transmitting lever.