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Resin-made cage and bearing

A resin-made cage technology, applied to shafts and bearings, bearings, ball bearings, etc., to achieve the effect of improving production efficiency

Inactive Publication Date: 2009-04-01
NTN CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The present invention has been completed in view of the above problems, and its purpose is to provide a cage that can be used in an extremely low temperature environment or in a vacuum without forming a complicated structure of the cage and without performing special processing. Resin cages and bearings using them

Method used

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  • Resin-made cage and bearing
  • Resin-made cage and bearing
  • Resin-made cage and bearing

Examples

Experimental program
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Embodiment 1

[0072] figure 1 It is a group diagram (part of a cross-sectional view) showing a resin-made cage. figure 1 (a) represents a plan view, figure 1 (b) means figure 1 (a) Front view of section A-A, figure 1 (c) means figure 1 (a) side view of the B-B section, figure 1 (d) indicates figure 1 (c) Enlarged view of the circle-marked portion. like figure 1 (a)~ figure 1 As shown in (d), the resin cage 5 has a plurality of pockets 5a penetrating in the radial direction in the annular member, and pockets for accommodating rolling elements are attached to the pockets 5a from the inner ring side. Component 6. like figure 1 As shown in (d), a structure in which the pocket member 6 is bonded to the pocket portion 5a via the adhesive layer 7 is formed. For the pocket member 6, an enlarged view is shown in figure 2 .

[0073] The resin-made retainer 5 main body is a molded body of the first resin composition containing PEEK and PTFE.

[0074] The method of mixing and ...

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Abstract

A resin-made cage that without having any complex structure and without undergoing any special treatment, can be employed in an extremely low temperature environment or in vacuum. There is provided a resin-made cage comprising a circular ring frame with multiple radially through pocket portions and pocket members fitted to the circular ring frame and adapted to retain rollers of rolling bearing, wherein the frame is a molding of first resin composition having a solid lubricant mixed therein, and wherein the pocket members at least at their roller retaining surface for retention of the rollers consist of a second resin composition composed mainly of a fluororesin, and wherein the molding of the first resin composition has a tensile strength of 30 MPa or greater and an upper temperature limit of 200 DEG C or higher, and wherein the second resin composition is a fluororesin composition. This resin-made cage together with an inner ring, an outer ring and rollers interposed therebetween constructs a rolling bearing for use in a turbo pump for liquid fuel of rocket engine.

Description

technical field [0001] The present invention relates to a resin-made cage, and in particular, to a resin-made cage suitable for bearings used in an extremely low temperature environment using liquid hydrogen, liquid oxygen, liquid nitrogen, LNG, or the like, or in a vacuum. Background technique [0002] In rolling bearings, rolling elements such as balls or cylindrical rollers are arranged in the orbital space between the inner and outer rings, and these rolling elements are held by cages. The retainer is mostly guided on either side of the inner wheel or the outer wheel side. In addition, rolling bearings are sometimes used in low temperature environments. [0003] A typical example of a bearing used in a low temperature environment is an angular contact ball bearing used in a rotation support part of a turbopump for liquid fuel of a rocket engine. image 3 A configuration example of the angular contact ball bearing 1 used in the turbo pump is shown. This bearing is const...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/44F02K9/60F04D29/046F16C19/06F16C33/66
CPCF02K9/60F04D29/026F16C33/6696F16C33/44F16C2360/42F16C2300/52F04D29/023F16C19/14F16C33/3831F04D29/059F04D29/049F05D2300/43F05D2300/432F05D2300/509F16C19/163F16C2208/32F16C2208/36
Inventor 伊藤崇中村昌平野崎昌之江上正树石井卓哉太田丰彦冈安彰三原礼
Owner NTN CORP
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