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Shell type needle roller bearing, support structure of compressor spindle, and support structure of piston pump drive part

A technology for needle roller bearings and compressors, applied in needle roller bearings, roller bearings, rolling contact bearings, etc., can solve the problems of heat treatment interruption and unqualified, and achieve the effect of reducing manufacturing costs

Inactive Publication Date: 2007-01-31
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] ・If the heat treatment is interrupted due to a sudden power failure, etc., a large number of defective products will be produced

Method used

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  • Shell type needle roller bearing, support structure of compressor spindle, and support structure of piston pump drive part
  • Shell type needle roller bearing, support structure of compressor spindle, and support structure of piston pump drive part
  • Shell type needle roller bearing, support structure of compressor spindle, and support structure of piston pump drive part

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Embodiment Construction

[0070] Hereinafter, embodiments of the present invention will be described based on the drawings. The shell type needle roller bearing A of the present invention, such as figure 1 As shown, a plurality of needle rollers 3 are arranged along the inner diameter surface 2 that is the raceway surface of the shell-shaped outer ring 1 formed by the press working of the steel plate. The outer ring 1 is of an open-end type, and flanges 4a and 4b are formed at both ends. In addition, the needle roller 3 is a retainer ring assembled to the retainer 5.

[0071]As the raw material for the steel plate forming the outer ring 1 in the press process, the following pairs were used: carbon structural steel S40C (Example 1) with a C content of 0.4% by mass; and a tool with a C content of 0.85% by mass Steel SK5 spheroidizing annealing is a steel with a spheroidization rate of 50% or more of carbides (Example 2); carbon structural steel S55C with a C content of 0.55 mass% and a Si content of 0.15 to...

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Abstract

To further reduce the manufacturing cost of a shell type needle roller bearing, and to ensure high quality of the shell type outer ring by subjecting the outer ring to a heat treatment that needs no adjustment of the atmosphere. The steel sheet to be formed into the shell type outer ring 1 by pressing is made of a medium to high carbon steel containing carbon by not less than 0.3 mass percent. With this arrangement, the material cost and thus the manufacturing cost are lower than when using a conventional low-carbon structural alloy steel sheet or a steel sheet for cold rolling and pressing. Also, it is possible to ensure high quality of the outer ring by subjecting the outer ring to simple heat treatment without the need for carburizing or carbonitriding, which needs adjustment of the atmosphere.

Description

Technical field [0001] The present invention relates to a shell-type needle roller bearing, a support structure of a compressor main shaft using the shell-type needle roller bearing, and a support structure of a piston pump driving part. Background technique [0002] The needle roller bearing in which a plurality of needle rollers are arranged along the raceway surface of the outer ring, that is, the inner diameter surface, includes a shell-type needle roller bearing using a shell-shaped outer ring formed by press processing including a deep drawing process. For the steel material of the shell-shaped outer ring that is press-processed, low-carbon alloy structural steel plates such as SCM415 or cold-rolled steel plates such as SPC are used. In order to ensure product quality such as strength and surface hardness of the track surface, infiltration is carried out after press processing. Heat treatment such as carbon quenching or carburizing and nitriding treatment (for example, refe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/62F16C33/64F16C19/46C21D9/40F16C21/00
CPCC22C38/00F16C21/005C21D9/40F16C33/64F16C33/588F16C19/46F16C19/527Y10T29/49684
Inventor 大石真司松永浩司渡边靖之平冈恒哲
Owner NTN CORP
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