Bearing bush and method of manufacturing the bearing bush

DETAILED DESCRIPTION It is accordingly an object of the invention to provide a bearing bush and a method of manufacturing the bearing bush, which overcome the hereinafore-mentioned disadvantages of the heretofore-known devices and methods of this general type, which provide an outer tube that is rotatable relative to an inner tube in the event of torsional stress and which provide for easy manufacture.
With the foregoing and other objects in view there is provided, in accordance with the invention, a bearing bush, in particular for motor vehicles, comprising an inner tube of metal having an outer contour; an intermediate tube of synthetic material resting against the inner tube so as to be slideable at least in a circumferential direction, the intermediate tube having an inner surface being shaped in accordance with the outer contour of the inner tube, and the intermediate tube having an outer surface; and a vulcanized layer being applied onto the outer surface of the intermediate tube.
Therefore, in the event of torsional stress, the inner tube may be twisted relative to the intermediate tube and to the vulcanized layer bonded to the intermediate tube.
Such a bearing bush is of a particularly simple construction and is therefore easy to manufacture.
Since the intermediate tube is made of plastic or synthetic material, it may already be inserted during vulcanization into the vulcanizing mold so that an adaptation of the intermediate tube to the external contour of the inner tube is effected as early as during the vulcanizing process.
Advantageously, plastic or synthetic materials with low coefficients of friction, e.
g.
polyamide, are used for the intermediate tube.
In accordance with another feature of the invention, an axial locking of the intermediate tube and the parts connected thereto is achieved in a simple manner by providing the inner tube with an external contour which locks the intermediate tube in an axial direction.
In accordance with a further feature of the invention, the inner tube has at least one end bevel, against which the intermediate tube rests