ROLLING BEARING

To provide a rolling bearing capable of reducing the amount of dust generated from the inside of the bearing even if an internal pressure of the bearing increases in rotation of the rolling bearing.SOLUTION: In a rolling bearing 1, a plurality of balls 4 interposed between inner and outer rings 2, 3...

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Bibliographic Details
Main Authors TSUJI NAOAKI, TANAKA SHINKI, ITO CHIHARU
Format Patent
LanguageEnglish
Japanese
Published 07.07.2022
Subjects
BEARINGS
BLASTING
CYLINDERS
ELEMENTS OR CRANKSHAFT MECHANISMS
ENGINEERING ELEMENTS AND UNITS
FLEXIBLE SHAFTS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
LUBRICATING
MECHANICAL ENGINEERING
PISTONS
ROTARY BODIES OTHER THAN GEARING ELEMENTS
SEALINGS
SHAFTS
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:To provide a rolling bearing capable of reducing the amount of dust generated from the inside of the bearing even if an internal pressure of the bearing increases in rotation of the rolling bearing.SOLUTION: In a rolling bearing 1, a plurality of balls 4 interposed between inner and outer rings 2, 3 are held by a retainer 5, and a sealing member 6 for blocking a bearing space between the inner ring 2 and the outer ring 3 is mounted to the outer ring 2. A seal groove 7 is formed in a circumferential direction on an outer peripheral surface 2b of the inner ring 2, and the sealing member 6 includes a metallic core 10, a main lip 15 abutting on an outer groove wall surface 7c in the seal groove 7 and a noncontact sub-lip 16 in the seal groove 7. The sub-lip 16 projects to the inside in an axial direction from a base end part, and a labyrinth seal Rs is formed between a tip part of the sub-lip 16 and an inner groove wall surface 7a of the seal groove 7. When the maximum distance in an axial direction from a bearing inner side position of the metallic core 10 to a tip of the sub-lip 16 is set as D and the plate thickness of the metallic core 10 is set as (d), 1.90≤D/d≤2.50 is satisfied.SELECTED DRAWING: Figure 1 【課題】転がり軸受の回転時に軸受内圧が上昇した場合においても、軸受内部からの発塵量を低減することができる転がり軸受を提供する。【解決手段】転がり軸受１は、内外輪２，３間に介在する複数の玉４が保持器５に保持され、内輪２および外輪３間の軸受空間を塞ぐシール部材６が外輪２に取付られる。内輪２の外周面２ｂにシール溝７が周方向に形成され、シール部材６は、芯金１０と、シール溝７における外側溝壁面７ｃに接触する主リップ１５と、シール溝７に非接触の副リップ１６とを備える。副リップ１６は、基端部から軸方向内側に突出し、副リップ１６の先端部とシール溝７の内側溝壁面７ａとの間でラビリンスシールＲｓが形成される。芯金１０の軸受内部側位置から副リップ１６の先端部までの軸方向における最大の距離をＤとし、芯金１０の板厚をｄとしたとき、１．９０≦Ｄ／ｄ≦２．５０である。【選択図】図１
Bibliography:Application Number: JP20200217398