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Thin-walled antifriction bearings

A rolling bearing and needle bearing technology, applied in rolling contact bearings, roller bearings, needle roller bearings, etc., can solve the problems of inaccurate functions, achieve the effect of small design space, high rigidity, and reduce hardening temperature

Inactive Publication Date: 2006-09-06
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The consequence of this fatigue phenomenon is that the function of the entire system becomes imprecise due to the increased play after a defined load duration

Method used

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  • Thin-walled antifriction bearings
  • Thin-walled antifriction bearings
  • Thin-walled antifriction bearings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] exist figure 1 The drawn-cup-only needle roller bearing shown in and denoted by 1 has a radial section 2 with an annular profile, which transforms at one end into a radially inward rib 3 and is closed at the other end by a base plate 4 . The needle rollers 7 guided in the cage 6 roll between the rib 3 and the base 4 provided with the projection 5 . This type of needle roller bearing with only a drawn cup is closed at the bearing position at the shaft end.

[0052] If such a needle roller bearing 1 with only a drawn outer ring is produced in one pass according to the prior art with the same outer diameter from steel designated DC04M and according to the claims from the cold-formable and hardenable according to the invention steel made in one go, then there are the following potential savings through the new design according to the invention:

[0053] - Only needle roller bearings with drawn outer rings can have their wall thickness reduced to 50%;

[0054] - The diamete...

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Abstract

The invention relates to thin-walled rolling bearings, such as needle bearings, which are produced without the removal of material and the outer rings of which form a structural unit and are produced from a cold-rolled strip. According to the invention, the outer rings are produced from a cold-formable, fully hardenable steel, a ratio of from 1:20 to 1:5 being set between their wall thickness and the diameter of the bearing needles, and the fully hardened wall having a core hardness of >=600 HV and a surface hardness of >=680 HV. The invention makes it possible for bearings to withstand higher static bearings than bearings made from conventional steels while taking up the same installation space.

Description

technical field [0001] The invention relates to a non-cutting thin-walled rolling bearing, such as a needle bearing, whose outer ring is made of cold-rolled strip. Furthermore, the invention relates to a universal joint crosshead sleeve for accommodating a bearing neck of a rolling bearing, which is likewise produced from cold-rolled strip material. Background technique [0002] Cold-rolled steel strip is often used to manufacture cold-formed products. Increased requirements in terms of application and use properties require better mechanical, especially deformation properties. Good deformability is characterized by as high as possible r values ​​for deep drawability, high n values ​​for drawability and high strain values ​​for plane strain behavior. In this case it has proven to be advantageous if the deformation behavior is as equal as possible in the different directions, in particular in the longitudinal, transverse and oblique directions, ie substantially isotropic. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/46F16D3/38C21D9/40F16C19/26F16C21/00F16C33/62F16C33/64
CPCC22C38/04C21D9/40F16C21/005F16D3/385F16C33/588F16C19/466F16C33/64F16C33/62F16C2361/41F16C2202/04
Inventor 卡尔-路德维格·格雷尔列奥·明特尼奇京特·格鲁贝斯特凡·格斯特纳诺贝特·拉丁格
Owner SCHAEFFLER TECH AG & CO KG