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Sintered oil-impregnated bearing and manufacturing method thereof

A bearing and bearing hole technology, applied in the direction of bearings, shafts, bearings, bearing components, etc., can solve the problems of sand sticking and supply, and achieve the effect of lowering the friction coefficient and improving the sliding characteristics.

Active Publication Date: 2019-11-08
DIAMET CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Patent Document 1 does not describe the specific air permeability of the surface formed by the rough part and other surfaces. However, if the air permeability of Patent Document 2 is at the level described in Patent Document 2, it is difficult to use it as a bearing in high-speed rotation or the like. Sufficient oil is supplied during work and oil leakage from the sliding surface is suppressed, and there is a possibility of sand sticking, etc.

Method used

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  • Sintered oil-impregnated bearing and manufacturing method thereof
  • Sintered oil-impregnated bearing and manufacturing method thereof
  • Sintered oil-impregnated bearing and manufacturing method thereof

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Experimental program
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Effect test

Embodiment

[0054] The test results conducted to verify the effects of the present invention will be described. As the raw material powder used in the test, iron-copper-based powder in which iron, copper, tin (low melting point alloy), graphite, etc. were mixed in a predetermined ratio was used. As its mixing ratio, copper powder was adjusted to 50% by mass, tin powder to 2% by mass, copper-phosphorus powder to 5% by mass, copper-zinc powder to 10% by mass, solid lubricants such as graphite to 0.5% by mass, and the remaining Part of it is iron powder. This raw material powder was compression-molded and sintered at a temperature of 950° C., followed by a straightening process, and a concave portion was formed on the inner peripheral surface of the bearing hole by cutting. Both assume that the length of the bearing is 8 mm, and the inner diameter of the bearing hole (of the sliding surface) is 8 mm.

[0055] For the obtained bearing, the inner peripheral surface of the bearing hole was ob...

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Abstract

The invention relates to a sintered oil-impregnated bearing, on the inner peripheral surface of a bearing hole (2) into which a shaft (11) is inserted, a sliding surface (3) supporting the outer peripheral surface of the shaft (11) and a bearing The shaft center of the hole (2) is a spiral oil supply surface (4), and the surface opening ratio on the sliding surface (3) is 10% or less, and the surface opening ratio of the oil supply surface (4) exceeds 10%. Thus, the present invention supplies a sufficient amount of oil to the sliding surface (3) and suppresses the supplied oil from moving inside from the sliding surface (3), thereby achieving a low coefficient of friction and improving the sliding characteristics of the bearing.

Description

technical field [0001] The present invention relates to a sintered oil-impregnated bearing capable of smooth lubrication by impregnating lubricating oil inside and its manufacturing method. [0002] This application claims priority based on Japanese Patent Application No. 2015-254810 for which it applied on December 25, 2015, and uses the content here. Background technique [0003] The sintered oil-impregnated bearing is used in the state where the lubricating oil is impregnated in the pores. When the shaft is started, the lubricating oil seeps from the inside between the shaft and the sliding surface of the bearing, and along with the rotation of the shaft, on the lubricating oil Creates pressure to support the shaft. Due to this lubricating property, it can be used for a long time without oil supply, so it is widely used as bearings such as bearings for motors used in vehicles. [0004] In such sintered oil-impregnated bearings, in order to properly generate pressure on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C33/10F16C17/02F16C33/14
CPCF16C2240/44F16C2220/60F16C2360/22F16C2202/50F16C2202/10F16C33/1065F16C17/026F16C33/104F16C33/145F16C2220/20F16C2202/52F16C2204/10
Inventor 河野肇石井义成加藤纯
Owner DIAMET CORP
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