Bearings – Rotary bearing – Plain bearing
Patent
1992-08-12
1993-12-07
Footland, Lenard A.
Bearings
Rotary bearing
Plain bearing
384273, 384294, 384295, F16C 1710
Patent
active
052677974
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase of PCT/DE91/01011 filed 19 Dec. 1991 and based, in turn, on German national applications P40 41 556.2 of 22 Dec. 1990 and P41 40 277.4 of 6 Dec. 1991.
FIELD OF THE INVENTION
My present invention relates to a compound journal and thrust plain bearing comprising a half-liner-shaped or bush-shaped journal bearing part and a part-ring-shaped thrust bearing part or a set of part-ring-shaped thrust bearing parts attached at one or both ends thereof. More particularly, the invention relates to bearings of this type in which each thrust bearing part comprises on its inner peripheral rim a plurality of inwardly extending retaining projections which are angularly spaced from each other and which are inserted into a recess provided in the region of the arcuate or circular margin of the journal bearing part.
The invention also relates to a method for the manufacture of such compound journal and thrust plain bearings.
BACKGROUND OF THE INVENTION
Compound journal and thrust bearings are known from a number of prior publications. They have, in comparison with journal and thrust plain bearings made in one piece (flange bearings), the advantage that for the journal bearing part a different material may be used than for the thrust bearing part so that optimum adaptation of material to the specific loading conditions is possible.
To keep the wear of the bearing parts of a journal and thrust plain bearing as low as possible, the centering and fixing of the bearing parts with respect to each other is of great importance because a certain movability of the thrust bearing part relative to the journal bearing part is desired for the assembly of the plain bearing alone.
DE-OS 26 38 996 describes divided journal and thrust plain bearings in which the thrust bearing parts have noses functioning as retaining projections, which must be bent towards the bearing axis and engage into corresponding recesses made in the journal bearing part and open at the outer edge. Because the bent retaining projections should be supported on the bearing hole of the bearing housing, these retaining projections must be bent with high precision. The peripherally large extent of these retaining projections also requires an expensive bending process.
Finally the arrangement of the recesses does not offer the necessary safe fixing of the bearing parts in axial direction.
EP 298 953 describes a journal and thrust plain bearing composed of a bearing half-liner and a separate thrust flange in which, for the fixing of the flange on the bearing half-liner, the latter is provided with insertion openings which are open towards the outer edge and form a dovetail undercut acting in axial direction.
Corresponding to these insertion openings, fixing attachments are provided on the thrust flange which consist of tongues extending at an angle in axial direction. For this reason, even in the journal and thrust plain bearings known from EP 298 953, the retaining projections must be very long and be bent with high precision.
In order to connect the thrust flange with the bearing inlet, the thrust flange is seated on the bearing half-liner in radial direction. If all fixing attachments have a dovetail shape corresponding to the insertion openings, it is necessary to compress the bearing half-liner to insert the fixing attachments in the insertion openings. This compression eliminates not only the free speed of the bearing half-liner but also deforms the bearing half-liner in addition. This may damage the bearing half-liner.
If only the outer fixing attachments have a dovetail shape and may be inserted in the insertion recesses made for them by the use of the clearance desired between the journal bearing part and the thrust flange, a central fixing attachment must first be rectangularly made and after the seating of the thrust flange on the bearing half-liner widened in dovetail form. This widening in a dovetail form of the bent fixing attachments is difficult and there is a danger that the jo
REFERENCES:
patent: 4702624 (1987-10-01), Fontana
patent: 5114246 (1992-05-01), Gowan
patent: 5145264 (1992-09-01), Bryden et al.
Dubno Herbert
Footland Lenard A.
Glyco Metall-Werke Glyco B.V. & Co. KG
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