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Resin coated holder for roller bearings

A technology for rolling bearings and cages, applied in the direction of roller bearings, bearing components, shafts and bearings, etc., can solve the problems of not being able to fully improve the mechanical strength of cages, and cannot use resin cages, so as to improve mechanical strength and durability , Strong tensile capacity, strong impact resistance

Pending Publication Date: 2021-03-26
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in the surface treatment of the above-mentioned conventional cages, the treatment of the resin coating is used, and the lubricity and wear resistance required for the pockets of the cage can be improved by including a liquid lubricant or a solid lubricant in the resin. However, the resin coating However, the mechanical strength of the retainer cannot be sufficiently improved
[0013] In addition, taffy salt bath carbonitriding treatment for metal cannot be used for resin cages.

Method used

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  • Resin coated holder for roller bearings
  • Resin coated holder for roller bearings
  • Resin coated holder for roller bearings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Using polyamide resin (PA) cages (hereinafter referred to as standard cages) for tapered roller bearings (inner diameter 130mm, outer diameter 240mm, width 80mm) as the base material, on the surface, two-liquid collision mixing Type spray gun (manufactured by American Gasmer Corporation: GX) will "polyurea resin composed of components containing aliphatic polyisocyanate, polyoxyalkylene polyols with amino groups as terminal groups and chain extenders" (US Line Made by Company X: LINE-X) is sprayed on the entire surface of the base material of the cage and reacted and cured to form a polyurea resin film with an average film thickness of 1.0mm, and to manufacture cages with a resin film for roller bearings ( figure 1 form shown).

Embodiment 2

[0051] A resin-coated cage for a roller bearing was produced in exactly the same manner as in Example 1 except that a polyurea resin film having an average film thickness of 0.5 mm was formed.

Embodiment 3

[0053] A resin-coated cage for a roller bearing was manufactured in exactly the same manner as in Example 1 except that a polyurea resin film having an average film thickness of 1.8 mm was formed.

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Abstract

This resin coated holder is provided with a polyurea resin coat (7) over a portion or the whole of the surface of a synthetic resin base material of a holder (1). The combination of the polyurea resincoat and the base material causes a coat to be formed having abrasion resistance, impact resistance, and adequate elongation characteristics which are resistant to tensile force. This allows the mechanical strength and durability of the holder to be improved sufficiently.

Description

technical field [0001] The present invention relates to a resin-coated cage for a rolling bearing in which a resin coating is provided on the surface of the rolling bearing cage to improve strength and the like. Background technique [0002] In general, the cage of a rolling bearing is a member that holds the rolling elements interposed between the inner ring and the outer ring in a freely rotatable manner in pockets. The cage is made of metal such as steel or synthetic resin, and its form is also known. There are crown-shaped or iron plate corrugated cages for ball bearings, basket-shaped cages for roller bearings, and comb-shaped cages for double-row roller bearings. [0003] Cages of such rolling bearings require wear resistance, self-lubricating properties, or lubricating oil retention properties in order to withstand contact with rolling elements such as balls or rollers, and therefore surface treatment may be performed. [0004] For example, taffeta salt bath carbonit...

Claims

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Application Information

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IPC IPC(8): F16C33/46F16C19/36F16C33/56
CPCF16C33/56F16C19/36F16C33/46
Inventor 木村大碁
Owner NTN CORP
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