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Sintered bearing

A technology for sintering bearings and bearings, applied in the direction of bearings, bearing assembly, shafts and bearings, etc., can solve the problems of high manufacturing cost, peeling off of sealing parts, complex structure, etc., and achieve the effect of low cost and simple structure

Active Publication Date: 2019-07-05
DIAMET CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, for example, in a structure that incorporates a seal holding member that holds the seal member independently of the bearing member as in Patent Document 3, in order to maintain the seal, the seal holding member needs to be formed separately from the bearing member, resulting in a complicated structure and manufacturing costs. high problem
In addition, in a structure in which a resin seal member is insert-molded at the end of the bearing member, the seal member is easily peeled off from the bearing member, and it is difficult to integrate the resin seal member into the bearing member formed of a sintered body.

Method used

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Experimental program
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Effect test

no. 1 approach

[0028] figure 1 It is a partially cutaway perspective view showing the sintered bearing according to the first embodiment of the present invention. in addition, figure 2 is expressed by figure 1 The sintered bearing maintains the state of the shaft, figure 1 A cross-sectional view along the line A-A'.

[0029] The sintered bearing 10 is used, for example, as a structural part of an EGR valve provided in an EGR passage of an EGR device. A valve shaft S is provided on the housing of the EGR valve through a sintered bearing 10 , and the valve shaft S is reciprocated (stroked) by an actuator to open and close the valve body relative to the valve seat. The sintered bearing 10 is a component that integrates a function as a seal that hermetically seals between the valve shaft S and the housing and a function as a bearing.

[0030] The sintered bearing 10 is constructed of a substantially cylindrical bearing sleeve 11 , a ring-shaped seal member 12 , and a spacer member (fasteni...

no. 2 approach

[0046] image 3 It is a cross-sectional view showing a sintered bearing according to a second embodiment of the present invention. Additionally, for figure 1 and figure 2 Components that are the same as those of the first embodiment shown are assigned the same reference numerals, and descriptions thereof will be omitted.

[0047] The sintered bearing 30 of the second embodiment uses a washer member (fastening member) 33 as a press-fit cap instead of the fastening between the bearing sleeve and the fastening member by caulking as in the first embodiment. The spacer member 33 has an L-shaped cross section parallel to the axial direction, has an outer peripheral portion 33a extending cylindrically in the axial direction, and extends inwardly from the outer peripheral portion 33a in a direction at right angles to the axial direction. The ring portion 33b. The outer diameter of the outer peripheral portion 33 a is formed slightly larger than the inner diameter surrounded by th...

no. 3 approach

[0050] Figure 4 It is a cross-sectional view showing a sintered bearing according to a third embodiment of the present invention. Additionally, for figure 1 and figure 2 Components that are the same as those of the first embodiment shown are assigned the same reference numerals, and descriptions thereof will be omitted.

[0051] The sintered bearing 40 of the third embodiment uses a washer member (fastening member) 43 as a press-fit cap instead of the fastening between the bearing sleeve and the fastening member by caulking as in the first embodiment. The spacer member 43 has an L-shaped cross section parallel to the axial direction, has an outer peripheral portion 43a extending in a cylindrical shape in the axial direction, and extends inwardly from the outer peripheral portion 43a in a direction at right angles to the axial direction. The spacer member 43 is disposed so as to cover the axial one end surface 41a of the bearing sleeve 41 .

[0052] In addition, the beari...

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PUM

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Abstract

The present invention is characterized by being provided with: a bearing sleeve (11) composed of a sintered material and having a shaft hole; an annular seal member (12) disposed such that one surfacethereof contacts the bearing sleeve; and a washer member (13) which is in contact with the other surface opposite to the one surface of the seal member and engages the seal member with the bearing sleeve, wherein the washer member (13) is fixed relative to the bearing sleeve (11).

Description

technical field [0001] The present invention relates to a sintered bearing that uses a sintered material and is used to support a shaft member. [0002] This application claims priority based on Patent Application No. 2016-228111 filed in Japan on November 24, 2016, and uses the content thereof here. Background technique [0003] The sintered material has many advantages that not only the quality is stable and can be produced by mass production, but also a composition that is difficult for a sintered material can be used, and a porous body and the like can be produced. Utilizing this property, sintered products suitable for bearings, such as oil-impregnated bearings and dry bearings (dry friction bearings), which can be placed in places where there is little work to replenish lubricating oil and oil supply is difficult, etc., have been realized, and have been This sintered product is widely used as a sintered bearing (for example, refer to Patent Document 1 and Patent Docum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C33/74B22F5/00F16J15/18
CPCB22F5/00F16C33/74F16J15/18F16C33/128F16C2226/52
Inventor 丸山恒夫石井义成藤井伸和末永贵之
Owner DIAMET CORP