JP2012047248A5

JP2012047248A5 - Seal member and rolling bearing provided with the same

Info

Publication number: JP2012047248A5
Application number: JP2010189244A
Authority: JP
Filing date: 2010-08-26
Publication date: 2013-08-29
Anticipated expiration: 2030-08-26

Description

上記の課題を解決するために、本発明の請求項１に係る発明は、芯金と弾性体とからなり、軸受の内輪と外輪の間を封止する環状のシール部材であって、
前記弾性体は、前記芯金より径方向に沿って延出し、
前記シール部材の内周部の先端に形成されたリップ部が、軸受内部に向かって折り曲げられていることを特徴とする。
また、本発明の請求項２に係る発明は、請求項１に記載のシール部材を備え、前記シール部材の外周部に形成した取付け嵌合部が、前記外輪内周面の軸線方向両端部近傍に形成したシール嵌合溝に嵌合されると共に、前記シール部材の内周部の先端に形成したリップ部が、前記内輪外周面の軸線方向両端部近傍に形成した内輪溝部と接触せず、内輪内径が１０ｍｍ以下の転がり軸受において、
前記内輪溝部には前記内輪の軸線方向両端面から軸線方向に沿って凸設された内側壁が形成され、前記リップ部は、前記内輪溝部及び前記内側壁と対向していることを特徴とする。
また、本発明の請求項３に係る発明は、シール部材のリップ部と該内側壁との軸方向隙間Δａ１若しくは最小隙間Δａ２が０．１４ｍｍ〜０．２６ｍｍであることを特徴とする。 In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention is an annular seal member that includes a cored bar and an elastic body and seals between an inner ring and an outer ring of a bearing,
The elastic body extends along a radial direction from the cored bar,
The lip portion formed at the tip of the inner peripheral portion of the seal member is bent toward the inside of the bearing.
In addition, the invention according to claim 2 of the present invention includes the seal member according to claim 1, and the mounting fitting portion formed on the outer peripheral portion of the seal member is in the vicinity of both axial ends of the inner peripheral surface of the outer ring. The lip portion formed at the tip of the inner peripheral portion of the seal member is not in contact with the inner ring groove portion formed in the vicinity of both ends in the axial direction of the outer peripheral surface of the inner ring, In rolling bearings with an inner ring inner diameter of 10 mm or less,
The inner ring groove portion is formed with an inner wall projecting along the axial direction from both axial end surfaces of the inner ring, and the lip portion faces the inner ring groove portion and the inner wall. .
The invention according to claim 3 of the present invention is characterized in that the axial gap Δa1 or the minimum gap Δa2 between the lip portion of the seal member and the inner wall is 0.14 mm to 0.26 mm.

本発明の請求項４に係る転がり軸受は、内輪溝部には底壁が形成され、前記シール部材のリップ部と前記内輪との径方向隙間Δｒが０．０５ｍｍ〜０．１５ｍｍであることを特徴とする。 In the rolling bearing according to claim 4 of the present invention, a bottom wall is formed in the inner ring groove portion, and a radial clearance Δr between the lip portion of the seal member and the inner ring is 0.05 mm to 0.15 mm. And

本発明の請求項５に係る転がり軸受は、転がり軸受はファンモータ用玉軸受であることを特徴とする。 The rolling bearing according to claim 5 of the present invention is characterized in that the rolling bearing is a ball bearing for a fan motor.

１外輪
２内輪
２１１内側壁
２１２底壁
３転動体
４保持器
５シールリング
５０芯金
５１弾性体
５２外周縁部
５３シールリップ部
Δｒ径方向隙間
Δａ１軸方向隙間
Δａ２最小隙間 1 outer ring 2 inner ring 211 inner wall 212 bottom wall 3 rolling element 4 cage 5 seal ring
50 cored bar
51 Elastic body 52 Outer peripheral edge 53 Seal lip part Δr Radial gap Δa1 Axial gap Δa2 Minimum gap

Claims

  An annular seal member comprising a cored bar and an elastic body, sealing between the inner ring and the outer ring of the bearing,
  The elastic body extends along the radial direction from the cored bar,
  A seal member, wherein a lip portion formed at a tip of an inner peripheral portion of the seal member is bent toward the inside of the bearing.

An attachment fitting portion provided on the outer peripheral portion of the seal member, including the seal member according to claim 1, is fitted in seal fitting grooves formed in the vicinity of both end portions in the axial direction of the inner peripheral surface of the outer ring. In the rolling bearing in which the lip portion formed at the tip of the inner peripheral portion of the seal member does not contact the inner ring groove portion formed in the vicinity of both axial end portions of the outer peripheral surface of the inner ring, and the inner ring inner diameter is 10 mm or less,
The inner ring groove portion is formed with an inner wall projecting along the axial direction from both axial end surfaces of the inner ring, and the lip portion faces the inner ring groove portion and the inner wall. Rolling bearing.

The rolling bearing according to claim 2, wherein an axial gap Δa1 or a minimum gap Δa2 between the lip portion of the seal member and the inner wall is 0.14 mm to 0.26 mm.

The rolling according to claim 2 or 3 , wherein a bottom wall is formed in the inner ring groove portion, and a radial clearance Δr between the lip portion of the seal member and the inner ring is 0.05 mm to 0.15 mm. bearing.

The rolling bearing according to any one of claims 2 to 4, wherein the rolling bearing is a ball bearing for a fan motor.