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JP2016070314A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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Publication number
JP2016070314A
JP2016070314A JP2014197961A JP2014197961A JP2016070314A JP 2016070314 A JP2016070314 A JP 2016070314A JP 2014197961 A JP2014197961 A JP 2014197961A JP 2014197961 A JP2014197961 A JP 2014197961A JP 2016070314 A JP2016070314 A JP 2016070314A
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Japan
Prior art keywords
seal
inner ring
outer ring
ring
rolling bearing
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Pending
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JP2014197961A
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Japanese (ja)
Inventor
貴光 戸室
Takamitsu Tomuro
貴光 戸室
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NSK Ltd
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NSK Ltd
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Priority to JP2014197961A priority Critical patent/JP2016070314A/en
Publication of JP2016070314A publication Critical patent/JP2016070314A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
    • F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To manufacture a bearing with seal at a low cost by preventing leakage and scattering of grease of the bearing.SOLUTION: A rolling bearing includes an outer ring, an inner ring, a plurality of rolling elements rollably disposed between the outer ring and the inner ring, and a seal member disposed on axial end portions of the outer ring and the inner ring for closing a radial clearance between the outer ring and the inner ring. The seal member is fixed to the inner ring or the outer ring at radial one end portion, and slidably kept into contact with a seal groove formed on the other of the inner ring and the outer ring at the other radial end portion, and has an annular core metal, and an elastic member covering the core metal. The elastic member has a waist portion, a seal lip portion extending from the waist portion and slidably kept into contact with a side wall surface of a raceway ring end face of the seal groove, and a projecting portion extending in the axial direction from the core metal at the other radial end portion of the seal member, and a surface layer of a fluorine compound is formed on at least the seal lip portion.SELECTED DRAWING: Figure 1

Description

本発明は、転がり軸受に関する。   The present invention relates to a rolling bearing.

ロータリーエンコーダや、冷却ファン等の用途に適用されるシール付きの転がり軸受では、軸受内部のグリース成分が軸受外部に漏れ・飛散する可能性があり、漏れ・飛散されたグリース成分は軸受を取り付ける装置に付着してしまい、重大な品質問題になることがある。   In rolling bearings with seals that are used for applications such as rotary encoders and cooling fans, grease components inside the bearings may leak and scatter outside the bearings, and the grease components that leak and scatter are installed on the bearings. May cause serious quality problems.

グリース飛散の予防対策としてシールの材質を選定した軸受が、例えば特許文献１に知られている。特許文献１に記載された転がり軸受は、フッ素樹脂を主成分とする環状弾性シール部材である。   For example, Patent Document 1 discloses a bearing in which a seal material is selected as a countermeasure against grease scattering. The rolling bearing described in Patent Document 1 is an annular elastic seal member mainly composed of a fluororesin.

特開２００４−３０１２５４号公報JP 2004-301254 A

しかしながら、フッ素樹脂を主成分とするシール材は、汎用のシール材（例えば、ニトリルゴム）と比べて、原料コストが高い為、用途によって不向きの場合がある。   However, a sealing material containing a fluororesin as a main component has a higher raw material cost than a general-purpose sealing material (for example, nitrile rubber), and thus may not be suitable for some applications.

そこで、本発明は、シール付け軸受のグリース漏れ・飛散を抑えつつ、低価格で作られる転がり軸受を提供することを目的とする。   Therefore, an object of the present invention is to provide a rolling bearing that is made at a low cost while suppressing grease leakage and scattering of the sealed bearing.

本発明は上記の課題を解決する為に、（１）外輪と、内輪と、外輪と内輪との間に転動自在に配置された複数の転動体と、外輪及び内輪の軸方向端部に配置され、外輪と内輪との間の径方向隙間を塞ぐシール部材と、を備える転がり軸受であって、シール部材は、径方向一端部が内外輪のいずれかに固定され、径方向他端部が内外輪のいずれか他方に設けられるシール溝と摺接し、円環形状の芯金と、芯金を被覆する弾性部材と、を有し、弾性部材は、シール部材の径方向他端部に、腰部と、該腰部から延出して形成され、且つシール溝の軌道輪端面側壁面と摺接するシールリップ部と、芯金から軸方向へ延出する突出部とを有し、少なくともシールリップ部にフッ素化合物の表面層が形成されることを特徴とする転がり軸受を提供している。
（２）シールリップ部が摺接される外輪又は内輪は、シール溝にフッ素化合物の表面層が形成されることを特徴とする上記の（１）に記載の転がり軸受。 In order to solve the above-described problems, the present invention provides (1) an outer ring, an inner ring, a plurality of rolling elements that are freely rollable between the outer ring and the inner ring, and axial ends of the outer ring and the inner ring. And a seal member that closes a radial gap between the outer ring and the inner ring, wherein the seal member has one end in the radial direction fixed to one of the inner and outer rings, and the other end in the radial direction. Is in sliding contact with the seal groove provided on the other of the inner and outer rings, and has an annular cored bar and an elastic member that covers the cored bar, and the elastic member is disposed at the other radial end of the seal member. A waist part, a seal lip part extending from the waist part and in sliding contact with the side wall surface of the raceway ring end surface of the seal groove, and a protrusion part extending in the axial direction from the core metal, and at least the seal lip part Provides a rolling bearing characterized in that a surface layer of a fluorine compound is formed on
(2) The rolling bearing according to (1) above, wherein the outer ring or inner ring with which the seal lip portion is slidably contacted is formed with a surface layer of a fluorine compound in the seal groove.

本発明の転がり軸受は、少なくともシールリップ部にフッ素化合物の表面層が形成されているので、軸受の回転により、グリースから浸み出された基油がシール溝付近に移動された場合、該表面層が有するシールは、基油を弾き、軸受内部へ押し戻することができるので、グリース成分が軸受外部へ漏れることを抑制できる。更に、本発明に採用するシールは、材質を特定しないため、安価なシール材料を使用することができる。   In the rolling bearing of the present invention, since the surface layer of the fluorine compound is formed at least on the seal lip portion, when the base oil leached out of the grease is moved to the vicinity of the seal groove by the rotation of the bearing, Since the seal of the layer can repel the base oil and push it back into the bearing, the grease component can be prevented from leaking outside the bearing. Furthermore, since the seal employed in the present invention does not specify the material, an inexpensive seal material can be used.

本発明に係る第１実施形態の転がり軸受断面図である。It is rolling bearing sectional drawing of 1st Embodiment which concerns on this invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 本発明に係る第２実施形態の転がり軸受の要部拡大図である。It is a principal part enlarged view of the rolling bearing of 2nd Embodiment which concerns on this invention. 本発明に係る第３実施形態の転がり軸受の要部拡大図である。It is a principal part enlarged view of the rolling bearing of 3rd Embodiment which concerns on this invention.

＜第１の実施形態＞
本実施形態の転がり軸受１００は、深溝玉軸受であり、外輪１１と、内輪１２と、複数の玉（転動体）１３と、円環状のシール部材１４と、を有する。 <First Embodiment>
The rolling bearing 100 of this embodiment is a deep groove ball bearing, and includes an outer ring 11, an inner ring 12, a plurality of balls (rolling elements) 13, and an annular seal member 14.

外輪１１の内周面の外輪軌道面１９と、内輪１２の外周面の内輪軌道面２１との間には、複数の玉１３が転動自在に各軌道面１９，２１に沿った円周方向に配置される。複数の玉１３は、保持器２３によって円周方向に等間隔でそれぞれ保持される。   Between the outer ring raceway surface 19 on the inner circumferential surface of the outer ring 11 and the inner ring raceway surface 21 on the outer circumferential surface of the inner ring 12, a plurality of balls 13 can roll in a circumferential direction along the raceway surfaces 19 and 21. Placed in. The plurality of balls 13 are held by the cage 23 at equal intervals in the circumferential direction.

シール部材１４は、外輪１１及び内輪１２の軸方向端部に配置され、径方向一端部が外輪１１に固定されている。本実施形態では、外輪１１及び内輪１２の軸方向両端にシール部材１４が配置され、一対のシール部材１４は、外輪１１及び内輪１２を軸方向両側から挟み込む。これにより、シール部材１４は、外輪１１と内輪１２との間の径方向隙間を塞いで軸受空間２５を密封する。なお、シール部材１４は、外輪１１及び内輪１２の片側の側面にのみ設けた構成としてもよい。   The seal member 14 is disposed at axial ends of the outer ring 11 and the inner ring 12, and one radial end is fixed to the outer ring 11. In the present embodiment, seal members 14 are disposed at both axial ends of the outer ring 11 and the inner ring 12, and the pair of seal members 14 sandwich the outer ring 11 and the inner ring 12 from both sides in the axial direction. As a result, the seal member 14 closes the radial space between the outer ring 11 and the inner ring 12 and seals the bearing space 25. The seal member 14 may be provided only on one side surface of the outer ring 11 and the inner ring 12.

外輪１１の内周面における軸方向端部には、シール部材１４の基端側となる径方向一端部を固定する内周溝（シール溝）２７が形成され、内輪１２の外周面における軸方向端部にはシール部材１４の先端側である径方向他端部を収容する外周溝（シール取り付け溝）２９が形成されている。   An inner circumferential groove (seal groove) 27 that fixes one end in the radial direction on the proximal end side of the seal member 14 is formed at an axial end portion on the inner circumferential surface of the outer ring 11, and an axial direction on the outer circumferential surface of the inner ring 12 is formed. An outer peripheral groove (seal mounting groove) 29 that accommodates the other end in the radial direction, which is the tip side of the seal member 14, is formed at the end.

シール部材１４は、円環形状の芯金３１と、芯金３１の表面を被覆する弾性部材３３とを有する。芯金３１は、金属材料からなり、内周側の折曲部３５、外周側のクランク折曲部３７、折曲部３５とクランク折曲部３７との間の平坦な芯金基部３９を有する。   The seal member 14 includes an annular cored bar 31 and an elastic member 33 that covers the surface of the cored bar 31. The metal core 31 is made of a metal material, and has an inner peripheral bent portion 35, an outer peripheral crank bent portion 37, and a flat core metal base 39 between the bent portion 35 and the crank bent portion 37. .

弾性部材３３は、芯金３１の折曲部３５と、芯金基部３９と、クランク折曲部３７との全体を覆って芯金３１と一体に形成されている。弾性部材３３の材質としては、ニトリルゴム（ＮＢＲ）、シリコンゴム、アクリルゴム、フッ素ゴム等が挙げられる。   The elastic member 33 is formed integrally with the core metal 31 so as to cover the entire bent portion 35, the core metal base portion 39, and the crank bent portion 37 of the core metal 31. Examples of the material of the elastic member 33 include nitrile rubber (NBR), silicon rubber, acrylic rubber, and fluorine rubber.

シール部材１４は、基端側のクランク折曲部３７が弾性部材３３を介して、外輪１１のシール溝２７に固定されている。   In the seal member 14, the crank bent portion 37 on the base end side is fixed to the seal groove 27 of the outer ring 11 via the elastic member 33.

一方、シール部材１４の先端側は、図２に示すように、芯金３１から径方向に延出する腰部４１と、腰部４１の延出先端に形成される先端部４２とを有する。該先端部４２が軸方向外側に向けて延出され、内輪１２に形成されたシール溝２９における軌道輪端面側の壁面と摺接するすることで、シール部材１４はいわゆる「外当たりシール」となっている。なお、シール部材１４は、軸受内方に向けて略軸方向へ突出する突出部４３が形成されている。   On the other hand, as shown in FIG. 2, the distal end side of the seal member 14 has a waist portion 41 extending in the radial direction from the core metal 31, and a distal end portion 42 formed at the distal end of the waist portion 41. The distal end portion 42 extends outward in the axial direction, and comes into sliding contact with the wall surface on the end surface side of the raceway ring in the seal groove 29 formed in the inner ring 12, so that the seal member 14 becomes a so-called "outside contact seal". ing. The seal member 14 is formed with a protrusion 43 that protrudes substantially in the axial direction toward the inside of the bearing.

さらに、本実施形態のシール部材１４は、図１に示すように、芯金基部３９が外輪１１及び内輪１２の側面と平行に配置され、腰部４１は、芯金基部３９から軸受空間２５内で軸方向内側に向かって傾斜して延出されている。   Further, as shown in FIG. 1, the seal member 14 of the present embodiment has a core metal base portion 39 arranged in parallel with the side surfaces of the outer ring 11 and the inner ring 12, and the waist portion 41 is disposed in the bearing space 25 from the core metal base portion 39. It is inclined and extended toward the inner side in the axial direction.

図２に示す先端部４２は、内輪１２のシール溝２９より内側にオーバーラップして描かれている。これは先端部４２がシール溝２９との当接による変形前の状態を示すものである。実際のシール部材１４は、外輪１１に固定されると、先端部４２がシール溝２９に当接して、腰部４１が軸受空間２５の内側に向けて変形する。   The tip portion 42 shown in FIG. 2 is drawn so as to overlap the inside of the seal groove 29 of the inner ring 12. This shows a state before the tip portion 42 is deformed due to contact with the seal groove 29. When the actual seal member 14 is fixed to the outer ring 11, the distal end portion 42 abuts on the seal groove 29, and the waist portion 41 is deformed toward the inside of the bearing space 25.

このようにして腰部４１が軸受の内部に向けて曲げられたシール部材１４は、先端部４２がシール溝２９の軌道輪端面側壁面に押し付けられる。この先端部４２のシール溝２９への押し付け圧力（接触圧力）は、腰部４１の弾性復元力により定まり、軸受内外の気密性を確保できるように設定される。   The seal member 14 with the waist portion 41 bent toward the inside of the bearing in this way is pressed against the side wall surface of the raceway ring end surface of the seal groove 29. The pressure (contact pressure) at which the tip 42 is pressed against the seal groove 29 is determined by the elastic restoring force of the waist 41 and is set so as to ensure airtightness inside and outside the bearing.

なお、上述の突出部４３は、軸受回転時に、軸受空間２５内のグリースを攪拌することで、グリースを玉１５へ供給することを促進する。   In addition, the above-mentioned protrusion part 43 accelerates | stimulates supplying the grease to the ball | bowl 15 by stirring the grease in the bearing space 25 at the time of bearing rotation.

更に、シール部材１４が、シール部材１４の先端部４２の各表面にフッ素化合物を塗布又はコーティングした表面層５７を有する。   Further, the seal member 14 has a surface layer 57 in which a fluorine compound is applied or coated on each surface of the tip portion 42 of the seal member 14.

フッ素化合物は、撥油性が良く、グリースから分離した離油がシール溝２９付近に流れ込んできた場合でも、油を弾き、軸受内部に押し戻す作用がある。そのため、先端部４２にフッ素化合物の表面層５７が形成されることで、軸受内部からのグリースの漏れをより確実に防止できる。フッ素化合物の塗布量としては、漏れ防止が図れる範囲で僅少とすることが好ましい。また、シール部材１４の弾性部材３３を耐油性の高いニトリルゴムで形成することで、グリースによって変質変形を起こすことなく、グリース漏洩を生じにくくすることができる。本実施形態によれば、安価で且つ密封性の良好な転がり軸受にすることができる。   The fluorine compound has good oil repellency, and even when the oil separation separated from the grease flows into the vicinity of the seal groove 29, it acts to repel the oil and push it back into the bearing. Therefore, the surface layer 57 of the fluorine compound is formed at the tip end portion 42, so that leakage of grease from the inside of the bearing can be prevented more reliably. The coating amount of the fluorine compound is preferably very small as long as leakage can be prevented. Further, by forming the elastic member 33 of the seal member 14 with nitrile rubber having high oil resistance, it is possible to make it difficult to cause grease leakage without causing alteration due to grease. According to this embodiment, it is possible to provide a rolling bearing that is inexpensive and has good sealing performance.

なお、フッ素化合物の表面層５７は、先端部４２に対してのみ形成してもよいが、シール部材１４の全体に形成してもよい。   The surface layer 57 of the fluorine compound may be formed only on the tip portion 42, but may be formed on the entire seal member 14.

＜第２の実施形態＞
図３は本実施形態の転がり軸受１１０の要部拡大図である。本実施形態の転がり軸受１１０は、内輪１２が、シール溝２９の表面にフッ素化合物を塗布又はコーティングした表面層５９を有する。本実施形態では内輪１２のシール溝２９に表面層５９を形成した場合を示しているが、内輪１２にシール部材１４を固定する場合は、外輪１１のシール溝に表面層５９を設けるものとする。他の構成は、上述の第１実施形態の転がり軸受１００と同様なので、説明を省略する。 <Second Embodiment>
FIG. 3 is an enlarged view of a main part of the rolling bearing 110 of the present embodiment. In the rolling bearing 110 of this embodiment, the inner ring 12 has a surface layer 59 in which a fluorine compound is applied or coated on the surface of the seal groove 29. In this embodiment, the surface layer 59 is formed in the seal groove 29 of the inner ring 12. However, when the seal member 14 is fixed to the inner ring 12, the surface layer 59 is provided in the seal groove of the outer ring 11. . Other configurations are the same as those of the rolling bearing 100 according to the first embodiment described above, and thus the description thereof is omitted.

本実施形態によれば、シールリップ部４３が接触するシール溝２９にフッ素化合物の表面層５９が形成されることで、軸受内部からのグリースの漏れをより確実に防止できる。   According to the present embodiment, the surface layer 59 of the fluorine compound is formed in the seal groove 29 with which the seal lip portion 43 comes into contact, so that leakage of grease from the inside of the bearing can be prevented more reliably.

＜第３の実施形態＞
図４は本実施形態の転がり軸受１２０の要部拡大図である。
本実施形態の転がり軸受１２０は、シール部材１４の先端部４２の表面にフッ素化合物を塗布又はコーティングした表面層５７を有する。また、内輪１２は、シール溝２９の表面にフッ素化合物を塗布又はコーティングした表面層５９を有する。 <Third Embodiment>
FIG. 4 is an enlarged view of a main part of the rolling bearing 120 of the present embodiment.
The rolling bearing 120 of the present embodiment has a surface layer 57 in which a fluorine compound is applied or coated on the surface of the distal end portion 42 of the seal member 14. The inner ring 12 has a surface layer 59 in which a fluorine compound is applied or coated on the surface of the seal groove 29.

なお、本実施形態では内輪１２のシール溝２９に表面層５９を形成した場合を示しているが、内輪１２にシール部材１４を固定する場合は、外輪１１のシール溝に表面層５９を設けるものとする。他の構成は、上述の第１実施形態の転がり軸受１００と同様なので、説明を省略する。   In this embodiment, the surface layer 59 is formed in the seal groove 29 of the inner ring 12, but when the seal member 14 is fixed to the inner ring 12, the surface layer 59 is provided in the seal groove of the outer ring 11. And Other configurations are the same as those of the rolling bearing 100 according to the first embodiment described above, and thus the description thereof is omitted.

本実施形態によれば、先端部４２と、内輪１２のシール溝２９の表面にそれぞれフッ素化合物の表面層５７，５９が形成されることで、軸受内部からのグリースの漏れ防止効果が相乗的に発揮され、より確実なグリース漏れを防止できる。   According to the present embodiment, the surface layers 57 and 59 of the fluorine compound are formed on the front end portion 42 and the surface of the seal groove 29 of the inner ring 12, respectively, thereby synergistically preventing the leakage of grease from the inside of the bearing. Demonstrated and can prevent grease leakage more reliably.

本発明は上記の実施形態に限定されるものではなく、明細書の記載、並びに周知の技術に基づいて、当業者が変更、応用することも本発明の予定するところであり、保護を求める範囲に含まれる。   The present invention is not limited to the above-described embodiments, and those skilled in the art can change or apply the present invention based on the description of the specification and well-known techniques. included.

１１ 外輪
１２ 内輪
１３ 玉
１４ シール部材
２７ 内周溝（シール溝）
２９ 外周溝（シール取り付け溝）
４１ 腰部
４２ 先端部
４３ 突出部
５７，５９ 表面層
１００，１１０，１２０ 転がり軸受 11 outer ring 12 inner ring 13 ball 14 seal member 27 inner circumferential groove (seal groove)
29 Peripheral groove (seal mounting groove)
41 Lumbar part 42 Tip part 43 Projection part 57, 59 Surface layer 100, 110, 120 Rolling bearing

Claims (2)

外輪と、内輪と、前記外輪と前記内輪との間に転動自在に配置された複数の転動体と、前記外輪及び前記内輪の軸方向端部に配置され、前記外輪と前記内輪との間の径方向隙間を塞ぐシール部材と、を備える転がり軸受であって、
前記シール部材は、径方向一端部が前記内外輪のいずれかに固定され、径方向他端部が前記内外輪のいずれか他方に設けられるシール溝と摺接し、円環形状の芯金と、前記芯金を被覆する弾性部材と、を有し、
前記弾性部材は、前記シール部材の径方向他端部に、腰部と、該腰部から延出して形成され、且つ前記シール溝の軌道輪端面側壁面と摺接するシールリップ部と、前記芯金から軸方向へ延出する突出部とを有し、
少なくとも前記シールリップ部にフッ素化合物の表面層が形成されることを特徴とする転がり軸受。 An outer ring, an inner ring, a plurality of rolling elements that are freely rollable between the outer ring and the inner ring, an axial end of the outer ring and the inner ring, and between the outer ring and the inner ring A rolling bearing comprising a sealing member that closes the radial clearance of
The sealing member has one end in the radial direction fixed to one of the inner and outer rings, the other end in the radial direction is in sliding contact with a seal groove provided in the other of the inner and outer rings, and a ring-shaped cored bar, An elastic member that covers the core metal,
The elastic member is formed at the other end in the radial direction of the seal member from a waist, a seal lip formed extending from the waist, and slidably in contact with a raceway end face side wall surface of the seal groove, and the core metal A projecting portion extending in the axial direction,
A rolling bearing, wherein a surface layer of a fluorine compound is formed at least on the seal lip portion. 前記シールリップ部が摺接される前記外輪又は前記内輪は、前記シール溝にフッ素化合物の表面層が形成されることを特徴とする請求項１に記載の転がり軸受。   The rolling bearing according to claim 1, wherein the outer ring or the inner ring to which the seal lip portion is slidably contacted is formed with a surface layer of a fluorine compound in the seal groove.
JP2014197961A 2014-09-29 2014-09-29 Rolling bearing Pending JP2016070314A (en)

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