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Ready-to-install needle bearing comprising an inner and outer ring

A technology of needle roller bearings and outer ring raceways, which is applied in the field of manufacturing needle roller bearings of the present invention, can solve the problems of difficult bearing assembly, cost hardening and grinding, etc., and achieve the effect of improving bearing capacity and small distortion

Inactive Publication Date: 2009-03-25
SCHAEFFLER KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, it has the disadvantage that in this case, as mentioned above, the shaft to be supported which provides the inner ring raceway also has to be hardened and ground again in a complex manner due to the missing inner ring
Although an increased load capacity is possible due to the missing needle roller cage, the support of the needle rollers with their tapered projections by the flanges of the retaining flanges significantly increases the difficulty of assembling such a bearing

Method used

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  • Ready-to-install needle bearing comprising an inner and outer ring
  • Ready-to-install needle bearing comprising an inner and outer ring

Examples

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Embodiment Construction

[0015] figure 1 The assembled needle roller bearing constructed according to the invention shown in and 2 comprises an outer ring 1 and an inner ring 3 which are arranged concentrically and nested within each other. Both the outer ring 1 and the inner ring 3 are provided on both sides at their axial ends with ribs 2 , 4 which are oriented radially inwardly and radially outwardly and at the same time form a surrounding annular gap 5 between them . Its radial extent can be varied by the length of the collars 2 , 4 , an advantageous sealing of the bearing being achieved with an as small as possible extent of the annular gap 5 . For this purpose, the radial extent of the collars 2, 4 is usually 25%-40% of the diameter of the needle roller 7, so that a secure axial stop is achieved. In the free space not described in more detail formed between the two rings 1, 3, a plurality of needle rollers 7 are mounted, which rotate about their own axis 6 when the bearing rotates about the ax...

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PUM

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Abstract

A ready-to-install needle bearing including a thin-walled outer ring (1) that is shaped without cutting and is provided with radially inwardly-facing stop rims (2) on both sides. Needle rollers (7) roll between the stop rims (2) on an associated external raceway (9). The inventive needle bearing is characterized in that an associated internal raceway (10) is formed by a thin-walled inner ring (3) which is shaped without cutting and is fitted with radially outwardly-facing stop rims (4) on both sides. The needle rollers (7) roll in a cageless manner or are disposed in a cage such that a captive ready-to-install needle bearing unit is created by using a positive gripping action, thus dispensing with the need for a part that is to be mounted having to act as a raceway.

Description

technical field [0001] The invention relates to a mounted needle roller bearing comprising a chip-free formed thin-walled outer ring provided on both sides with radially inwardly oriented ribs between which a plurality of needle rollers are arranged in a Rolling on the outer ring raceway. The invention also relates to an associated method for producing the needle bearing according to the invention. Background technique [0002] Needle roller bearings are a variant of cylindrical roller bearings consisting of thin, long rolling elements and are radially load-bearing only. Needle roller bearings have multiple needle rollers with a diameter-to-length ratio between 1:2.5 and 1:10. The radial and axial sliding surfaces of the cage or the ribs of the individual bearing races provide the axial guidance of the needle rollers. Needle roller bearings have a low overall height and are therefore particularly suitable for lightweight construction and constructions where the installati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/46F16C33/58F16C43/08
CPCF16C19/46Y10T29/49636F16C33/588
Inventor E·卢茨
Owner SCHAEFFLER KG
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