JPH073057Y2 - Ultra high molecular weight polyethylene bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an ultra-high molecular weight polyethylene bearing having a self-lubricating, low friction coefficient and slidable bearing material.

[Prior Art] Conventionally, as a bearing material having self-lubricity, a low friction coefficient, and slidability, there is one in which wood pieces called lignum biters are arranged in parallel in an axial direction and bonded to an inner peripheral surface of a metal shell.

[Problems to be solved by the invention] Although the above-mentioned lignum biter has excellent characteristics as a bearing material, since it is a natural wood, it lacks stability in material quality and supply, and recently, young wood with low wear resistance is used. It has been pointed out that when the bearing is subjected to a concentrated load, it cannot be sufficiently dispersed, and therefore, if the elasticity is about the same as that of a lignum bitter, the bearing will be broken and the like.

An object of the present invention is to provide an ultra high molecular weight polyethylene bearing that solves the above problems.

[Means for Solving the Problems] Description will be made with reference to the drawings. In the ultra high molecular weight polyethylene bearing according to the present invention which has solved the above-mentioned problems, the bearing material piece 2 where the rubber elastic layer 2a is sandwiched between the ultra high molecular weight polyethylene layers 2b and 2b and adhered is provided on the inner circumference of the metal shell 1. A metal strip 3 for positioning is attached to the inner surface of the metal shell 1 aligned in parallel in the axial direction so that the bearing material 2 is fixed thereby, and the shaft abutting surface of the ultra high molecular weight polyethylene layers 2b, 2b is attached to the shaft outer circumference. And a contact surface with the metal shell 1 is formed in an arcuate convex shape that is in close contact with the metal shell 1.

[Operation] Since the present invention uses ultra-high molecular weight polyethylene as a bearing material, it has excellent self-lubricating properties, has a friction coefficient significantly lower than that of lignum biter, and has excellent sliding properties. The supply is stable and the rubber elastic layer 2a is sandwiched between the ultra-high molecular weight polyethylenes 2b and 2b, so that the stress can be dispersed and relaxed even if a concentrated load is applied.

Example 1 1 is a metal shell, 2 is a bearing material, and the rubber elastic layer 2a is sandwiched between the ultrahigh molecular weight polyethylene layers 2b, 2b and bonded. The bearing material 2 is arranged in parallel with the inner circumference of the metal shell 1 in the axial direction so as to be adhered thereto, and a positioning metal strip 3 is attached to the inner surface of the metal shell 1 to fix the bearing material 2 and the ultra high molecular weight polyethylene layer. The shaft contact surfaces of 2b and 2b are formed in an arcuate concave shape substantially parallel to the shaft outer circumference, and the contact surface with the metal shell 1 is formed in an arcuate convex shape in close contact with the metal shell 1.

Ultra high molecular weight polyethylene has a molecular weight of several million and a melting point of 100 ° C.
The above-mentioned materials are pointed out. This material has high adhesiveness to both metal and rubber, has excellent self-lubricating property, has a low wear coefficient, and can slide.

In addition, as described above, the present invention is constructed by sandwiching the rubber elastic layer 2a between the ultra-high molecular weight polyethylene layers 2b and 2b and adhering the elastic layer 2a. Dispersion can be relaxed.

A metal strip 3 for positioning is fixed to the inner surface of the metal shell 1 by a screw 4, and the thickness of the strip 3 is smaller than that of the bearing material 2.

[Advantages of the Invention] Since the present invention is configured as described above, it is better in self-lubricating property, slidability, and concentrated stress relieving ability than a bearing using a conventional lignum biter as a bearing material. It is excellent, and the quality and supply of materials are stable, and it can be widely used as an excellent bearing.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical cut plan view, and FIG. 2 is a partially cutaway side view. 1 …… Metal shell 2 …… Bearing material 2a …… Rubber elastic layer 2b …… Ultra high molecular weight polyethylene 3 …… Strips 4 …… Bis

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 59-194841 (JP, A) JP 59-91053 (JP, A) JP 61-197812 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A bearing material piece (2) in which a rubber elastic body layer (2a) is sandwiched between ultra-high molecular weight polyethylene layers (2b, 2b) and bonded to the inner circumference of a metal shell (1) in the axial direction. The metal strips (3) for positioning are attached to the inner surface of the metal shell (1) so as to be aligned in parallel with each other, and thereby the bearing material (2) is fixed, and the polyethylene layer (2b, 2b)
The shaft contact surface of b) is formed in an arcuate concave shape substantially parallel to the shaft outer periphery, and the contact surface with the metal shell (1) is formed in an arcuate convex shape that is in close contact with the metal shell (1). Ultra high molecular weight polyethylene bearings.