Sliding bearing

Abstract

A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is superposed on the upper casing (3) so as to be rotatable about an axis (O), and has an synthetic resin-made annular surface (4) opposed to the annular surface (2); and a synthetic resin-made annular sheet (6) which is interposed between the annular surfaces (2) and (4) and slidably abuts against at least one of the upper casing (3) and the bearing body (5).

Description

technical field [0001] The present invention relates to a sliding bearing, and more particularly to a sliding bearing made of synthetic resin suitable to be incorporated in a four-wheeled vehicle as a thrust sliding bearing of a strut type overhang structure (Macpherson type). Background technique [0002] Generally, a strut-type overhang structure is mainly used in front wheels of four-wheeled vehicles, and is configured to combine a strut assembly with a coil spring mounted with a hydraulic shock absorber located at the same The main shaft is integrally formed in the outer cylinder body. Among these overhang structures, there is a type in which the axis of the coil spring is flexibly deflected with respect to the axis of the strut so as to allow the piston rod of the shock absorber installed in the strut to slide smoothly. In another configuration, the helical spring is provided by aligning the axis of the helical spring with the axis of the strut. In either of these two...

AI Technical Summary

Problems solved by technology

However, rolling bearings have the possibility of fatigue failure in the balls or needles due to minute vibrations and vibration loads, and there is a problem that it is difficult to maintain smooth steering operation

The problem with the plain bearing is that its frictional moment is higher than that of the rolling bearing, so an increase in the thrust load causes an increase in the frictional moment, which in turn causes a phenomenon that the steering operation is heavier; and depending on various combinations of synthetic resins, it will Creates a stick-slip phenomenon that frequently produces friction noise

However, there may be cases where, after long-term use, friction noise may be generated due to lubricant disappearance or the like

[0005] In addition, since a sliding bearing is generally constituted by two bearing bodies stacked on each other, there is a problem that when the required frictional characteristics cannot be obtained between the two bearing bodies, the friction between the two bearing bodies must be redone. design and manufacture

Images