Heat treatment method for rolling bearing device for wheel and cooling device for inner shaft

A heat treatment method and rolling bearing technology, applied in heat treatment furnaces, bearing components, heat treatment equipment, etc., can solve problems such as irregular discoloration of the outer peripheral surface, achieve uniform thickness and diffusion, suppress hardening irregularities, and omit the effect of turning steps

Active Publication Date: 2011-04-13
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, in the outer ring 2, the hardened layer may reach the outer peripheral surface of the tube, and in some cases, the outer peripheral surface may be irregularly discolored

Method used

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  • Heat treatment method for rolling bearing device for wheel and cooling device for inner shaft
  • Heat treatment method for rolling bearing device for wheel and cooling device for inner shaft
  • Heat treatment method for rolling bearing device for wheel and cooling device for inner shaft

Examples

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Embodiment Construction

[0038] Embodiments of the present invention will be specifically described below with reference to the drawings.

[0039] As mentioned above, figure 1 It is a sectional view showing an example of the rolling bearing device 1 for a wheel. refer to figure 1 , a rolling bearing device 1 for a wheel includes an outer ring 2 having the shape of a tube, an inner shaft 3 and a plurality of rolling elements 4, the inner shaft 3 being inserted into the tube and cooperating with the outer ring 2 around an axis A Arranged axially, said rolling elements 4 are interposed between the outer ring 2 and the inner shaft 3 .

[0040] Double rows (two rows in the figure) raceway surfaces 5 , 6 for supporting the rolling elements 4 for rolling are formed on the inner circumference of the tube of the outer ring 2 . Also, on the outer periphery of the tube, flanges 8 are integrally formed with the tube to protrude outward in the radial direction of the tube from a plurality of positions (only one...

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PUM

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Abstract

A heat treatment method applies heat treatment to a raceway surface of an outer ring while ejecting water to and cooling the entire outer peripheral surface of the outer ring. Also, the heat treatment method applies heat treatment to a raceway surface of an inner shaft while cooling a flange of the inner shaft by causing the flange to make contact with water. A cooling device has a holding section for holding the flange while causing the flange to make contact with the water.

Description

technical field [0001] The present invention relates to a heat treatment method of a raceway surface of a rolling bearing device for a wheel for rotatably held on a suspension device of an automobile or the like and a cooling unit for an inner shaft used in the heat treatment method wheel. Background technique [0002] figure 1 It is a sectional view showing an example of a rolling bearing device 1 for a wheel that has been widely used in recent years. refer to figure 1 , the rolling bearing device 1 for a wheel in this example includes an outer ring 2 having a tube shape; an inner shaft 3 inserted into the tube and arranged coaxially with the outer ring 2; rolling elements 4, and the plurality of rolling elements 4 are placed between the outer ring 2 and the inner shaft 3. [0003] Double-row (two rows in the figure) raceway surfaces 5 , 6 for holding the rolling elements 4 for rolling are formed on the inner circumference of the tube of the outer ring 2 . Also, on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/40C21D1/10C21D1/62F16C33/64
CPCC21D1/63F16C33/64C21D2211/008F16C2326/02C21D9/40C21D1/62
Inventor 中村久信立龟正平稻田充宏长绳邦宏小栗正彦南义之白川直人
Owner JTEKT CORP
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