JP2012197867A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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Publication number
JP2012197867A
JP2012197867A JP2011062349A JP2011062349A JP2012197867A JP 2012197867 A JP2012197867 A JP 2012197867A JP 2011062349 A JP2011062349 A JP 2011062349A JP 2011062349 A JP2011062349 A JP 2011062349A JP 2012197867 A JP2012197867 A JP 2012197867A
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Prior art keywords
resin film
ring
inner ring
rotating wheel
state
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Seiji Fujisaki
政治 藤崎
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JTEKT Corp
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JTEKT Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/78Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784Sealings 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
    • F16C33/7843Sealings 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
    • F16C33/7846Sealings 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 a gap between the annular disc and the inner race
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/78Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782Details of the sealing or parts thereof, e.g. geometry, material of the sealing region

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing into which foreign matter can surely be prevented from intruding until the rolling bearing begins to be used.SOLUTION: A deep groove ball bearing 10 includes an inner ring 12, an outer ring 11, and a sealing device 30 comprising a circular sealing member 15 for forming a labyrinth gap 17. The sealing device 30 has: a circular resin film 20 which is welded to the sealing member 15 and is extended toward the inner ring; and a circular adhesive layer 18 for fast sticking the resin film 20 to the outer periphery of the inner ring 12. A plurality of notches 21, each of which is extended from the middle of the radial direction to the side end of the inner ring, which are formed at almost equal intervals in the peripheral direction and each of which does not penetrate the resin film from the front surface to the back surface, are arranged on the resin film 20 so that the resin film acquires such a first state that the notches 21 are kept as they are and such a second state that the notches 21 are cut and the resin film is curled. When the deep groove ball bearing 10 is rotated relatively, the adhesive layer between the resin film and the inner ring is separated from the stuck state and the resin film acquires the second state to form the labyrinth gap.

Description

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

従来、転がり軸受は、固定側の外輪と、回転側の内輪と、この内輪と外輪との間に配置された転動体と、転動体を所定間隔で保持する保持器と、軸受内部に封入したグリース等の潤滑剤の外部への漏洩や、外部から軸受内部への異物の侵入を防止するために、転がり軸受の軸方向端部の周面(内輪と外輪との間の開口部)をシール部材で密封する密封装置とからなる。シール部材は、外輪の内径面の軸方向端部に嵌合装着され、内輪の外径面の軸方向端部に向けて延出し、延出した先端部は内輪との間にラビリンス隙間を形成している。
また、転がり軸受は、省エネルギーの観点から軸受を低トルクで回転させるニーズがあり、シール部材と軸受の内輪との間にラビリンス隙間を形成して非接触とすることによりトルク低減を実現しているものがある。(特許文献1)
Conventionally, a rolling bearing is sealed inside a fixed outer ring, a rotating inner ring, a rolling element disposed between the inner ring and the outer ring, a cage for holding the rolling element at a predetermined interval, and the inside of the bearing. Seal the peripheral surface (opening between the inner ring and outer ring) of the axial end of the rolling bearing in order to prevent grease and other lubricants from leaking to the outside and foreign materials from entering the bearing from the outside. And a sealing device for sealing with a member. The seal member is fitted and attached to the axial end of the inner ring surface of the outer ring, extends toward the axial end of the outer ring surface of the inner ring, and the extended tip forms a labyrinth gap between the inner ring and the inner ring. is doing.
In addition, rolling bearings have a need to rotate the bearing with low torque from the viewpoint of energy saving, and a torque reduction is realized by forming a labyrinth gap between the seal member and the inner ring of the bearing so as to be non-contacting. There is something. (Patent Document 1)

特開2010−43693号公報JP 2010-43693 A

しかしながら、上述の転がり軸受は、例えば、車両に組み込んで使用される場合、車両に組み込む準備として、軸受製造者からの調達時に防塵袋に入れられ数個単位で箱に梱包された軸受を取り出して上部が開放した組立品収納箱に移し替え、軸受が収められた組立品収納箱が車両組立場所の傍に段積みして置かれる。そして、車両組立場所では、作業者が組立品収納箱から転がり軸受を取り出して車両に組み込む。
転がり軸受は、組立品収納箱に収納されているときに、軸受の外周が露出するため周囲の環境によりシール部材と内輪との間のラビリンス隙間から異物が軸受内部へ侵入することがある。そこで、保管時や転がり軸受を使用する装置に組み込み後に初めて固定輪と回転輪とを相対回転させて使用開始(以下、単に「使用開始」という)するまでの間は軸受内部への異物の侵入を防止することが課題となっていた。
However, when the rolling bearing described above is used by being incorporated in a vehicle, for example, as a preparation for incorporation in the vehicle, take out the bearing packed in a box in several dust-proof bags when procured from the bearing manufacturer. It is transferred to an assembly storage box whose upper part is open, and the assembly storage boxes containing the bearings are stacked and placed near the vehicle assembly place. At the vehicle assembly location, an operator takes out the rolling bearing from the assembly storage box and incorporates it into the vehicle.
When the rolling bearing is housed in the assembly storage box, the outer periphery of the bearing is exposed, so that foreign matter may enter the bearing from the labyrinth gap between the seal member and the inner ring due to the surrounding environment. Therefore, foreign matter intrudes into the bearing during storage or until it is used for the first time after it is installed in a device that uses a rolling bearing and the fixed ring and rotating wheel are relatively rotated (hereinafter simply referred to as “use start”). It has been a problem to prevent the problem.

本発明は、このような課題を解決するためになされたものであって、保管時や転がり軸受を使用開始するまでの間、軸受内部への異物の侵入を確実に防止できる転がり軸受を提供することを目的とする。   The present invention has been made to solve such problems, and provides a rolling bearing capable of reliably preventing foreign matter from entering the bearing during storage or until the rolling bearing is started to be used. For the purpose.

請求項1に係る転がり軸受の構成上の特徴は、外径面に軌道面が形成された内輪と、
内径面に軌道面が形成された外輪と、
前記内輪と前記外輪との間の環状空間を密封する密封装置と、を備え、
前記内輪及び前記外輪は、いずれか一方が回転輪となり他方が固定輪となり、
前記密封装置は、前記回転輪と前記固定輪との間に配置され、前記固定輪の軌道面側外周の軸方向端部の周面に嵌合装着され、前記嵌合装着側に対向する前記回転輪の軸方向端部に向けて延出し、前記延出側の先端部と前記回転輪の軸方向端部近傍の外周との間にラビリンス隙間が形成される環状のシール部材を有する転がり軸受において、
前記密封装置は、
前記シール部材の前記延出側先端近傍の軸方向外側に溶着され、前記回転輪方向且つ軸方向外側に向けて延出する環状の樹脂フィルムと、
前記樹脂フィルムの径方向先端近傍且つ軸方向内側と、前記回転輪の軌道面側外周の軸方向端部の頂点が環状となる線から側面までの外周とを密着する環状の粘着層と、を有し、
前記樹脂フィルムは、
径方向途中から径方向に前記回転輪側端部まで且つ周方向に略等配に形成され、前記樹脂フィルムの表裏を貫通しない複数の切れ目が軸方向内側に設けられ、
前記切れ目が形成される第1状態と、
前記切れ目が切断され、前記回転輪側端部が軸方向外側に渦巻き状に巻き上げられる第2状態と、をとり、
前記転がり軸受の前記固定輪と前記回転輪との相対回転時に、前記樹脂フィルムと前記回転輪との間の前記粘着層が粘着状態から離反し、前記樹脂フィルムが前記第2状態をとり、前記ラビリンス隙間を形成することである。
The structural features of the rolling bearing according to claim 1 include an inner ring having a raceway surface formed on an outer diameter surface,
An outer ring having a raceway surface on the inner diameter surface;
A sealing device for sealing an annular space between the inner ring and the outer ring,
One of the inner ring and the outer ring is a rotating wheel and the other is a fixed ring,
The sealing device is disposed between the rotating wheel and the fixed wheel, and is fitted and mounted on a peripheral surface of an axial end of the fixed ring on the raceway surface side, and faces the fitting and mounting side. A rolling bearing having an annular seal member extending toward the axial end of the rotating wheel and having a labyrinth gap formed between the extending end and the outer periphery in the vicinity of the axial end of the rotating wheel In
The sealing device includes:
An annular resin film that is welded to the outside in the axial direction in the vicinity of the extending end of the seal member, and extends toward the rotating wheel and the outside in the axial direction;
An annular adhesive layer that closely contacts the outer periphery from the line to the side surface in the vicinity of the radial tip of the resin film and the axially inner side, and the apex of the axial end of the raceway surface side outer periphery of the rotating wheel is an annular shape. Have
The resin film is
From the middle in the radial direction to the end portion on the rotating wheel side in the radial direction and in the circumferential direction, is formed substantially equally, a plurality of cuts that do not penetrate the front and back of the resin film is provided on the inner side in the axial direction,
A first state in which the cut is formed;
Taking the second state in which the cut is cut and the rotating wheel side end is spirally wound outward in the axial direction;
At the time of relative rotation between the fixed ring and the rotating ring of the rolling bearing, the adhesive layer between the resin film and the rotating ring is separated from the adhesive state, the resin film takes the second state, It is to form a labyrinth gap.

請求項1の転がり軸受によれば、固定輪に嵌合装着されるシール部材と回転輪との間のラビリンス隙間が、シール部材に溶着された樹脂フィルムと回転輪の外周とが粘着層により密着して密封できる。また、転がり軸受は、固定輪と回転輪との相対回転時に、密着していた樹脂フィルムと回転輪とが離反し、樹脂フィルムは切れ目が切断され渦巻き状に巻き上げられることにより、ラビリンス隙間を確保できる。これにより、転がり軸受は、相対回転時までの間、軸受内部への異物の侵入を確実に防止できる。   According to the rolling bearing of claim 1, the labyrinth gap between the seal member fitted and attached to the fixed ring and the rotating ring is such that the resin film welded to the seal member and the outer periphery of the rotating ring are in close contact with the adhesive layer. And can be sealed. In addition, the rolling bearing ensures a labyrinth clearance by the resin film and the rotating ring that are in close contact with each other when the fixed ring and the rotating ring are rotated relative to each other, and the resin film is wound and wound up in a spiral shape. it can. Thereby, the rolling bearing can reliably prevent foreign matter from entering the bearing until the relative rotation.

本発明によれば、保管時や転がり軸受を使用開始するまでの間、軸受内部への異物の侵入を確実に防止できる転がり軸受を提供することができる。   According to the present invention, it is possible to provide a rolling bearing capable of reliably preventing foreign matter from entering the bearing during storage or until the rolling bearing is started to be used.

本発明の実施形態の転がり軸受の要部断面図である。It is principal part sectional drawing of the rolling bearing of embodiment of this invention. 図1における樹脂フィルム周辺の部分拡大断面図である。It is a partial expanded sectional view of the resin film periphery in FIG. 図2における樹脂フィルムのA矢視図である。It is A arrow line view of the resin film in FIG. 図1における樹脂フィルム周辺の部分拡大断面図である。It is a partial expanded sectional view of the resin film periphery in FIG. 図4における樹脂フィルムのB矢視図である。It is a B arrow line view of the resin film in FIG.

以下、本発明の転がり軸受を具体化した実施形態を、図面を参照しつつ説明する。
図1は、本発明の実施形態の深溝玉軸受10(転がり軸受)の要部断面図である。深溝玉軸受10は、内径面に深溝の軌道面11aが形成された固定側の外輪11(固定輪)と、外径面に深溝の軌道面12aが形成された回転側の内輪12(回転輪)と、この内外輪11,12の間に配置された複数の玉13とを備える。
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which a rolling bearing of the present invention is embodied will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a main part of a deep groove ball bearing 10 (rolling bearing) according to an embodiment of the present invention. The deep groove ball bearing 10 includes a fixed-side outer ring 11 (fixed ring) having a deep groove raceway surface 11a formed on an inner diameter surface and a rotation-side inner ring 12 (rotating wheel) having a deep groove raceway surface 12a formed on an outer diameter surface. ) And a plurality of balls 13 arranged between the inner and outer rings 11 and 12.

この玉13は、内輪12の回転にともなって、内外輪11,12の軌道面11a,12a上を転動するようになっている。
また、玉13は、隣接する玉間に所定間隔が保持されるように公知の保持器14で保持され、転送面11a,12a上を片寄ったり位置ずれしたりすること無くスムーズに転動できるようになっている。
さらに、深溝玉軸受10内には、潤滑剤としてグリース等が封入されている。
The ball 13 rolls on the raceway surfaces 11 a and 12 a of the inner and outer rings 11 and 12 as the inner ring 12 rotates.
Further, the balls 13 are held by a known cage 14 so that a predetermined interval is held between adjacent balls, so that the balls 13 can roll smoothly without being shifted or displaced on the transfer surfaces 11a and 12a. It has become.
Furthermore, grease or the like is sealed in the deep groove ball bearing 10 as a lubricant.

さらに、外輪11の内径面の軸方向の両端部であって転送面11aの傍らには、外輪シール溝11bが形成され、外輪シール溝11bに環状の密封装置30の基部が嵌合装着されている。密封装置30は、金属製の芯金16に合成ゴムからなり弾性を有するシール部材15を固着して形成される。
密封装置30は、深溝玉軸受10の径方向の内側、即ち内輪12の外径面の軸方向端部に向けて延出し、その先端部はシール部材15のみからなり内輪12との間にラビリンス隙間17を構成している。密封装置30の内面にはシール部材15から突出するシール凸部15aが形成され、シール凸部15aは内輪12との間にラビリンス隙間17の入口を狭めて構成している。
密封装置30は、シール部材15の先端部の軸方向外側に樹脂フィルム20が溶着され、樹脂フィルム20は 内輪12方向且つ軸方向外側に向けて延出して内輪12の外周に密着させて深溝玉軸受10の内部を密封している。
Further, an outer ring seal groove 11b is formed at both ends in the axial direction of the inner diameter surface of the outer ring 11 and beside the transfer surface 11a, and the base of the annular sealing device 30 is fitted and attached to the outer ring seal groove 11b. Yes. The sealing device 30 is formed by fixing a sealing member 15 made of synthetic rubber and having elasticity to a metal core 16.
The sealing device 30 extends toward the inside in the radial direction of the deep groove ball bearing 10, that is, toward the axial end of the outer diameter surface of the inner ring 12, and the tip end thereof is composed only of the seal member 15 and is a labyrinth between the inner ring 12. A gap 17 is formed. A seal projection 15 a protruding from the seal member 15 is formed on the inner surface of the sealing device 30, and the seal projection 15 a is configured by narrowing the entrance of the labyrinth gap 17 between the inner ring 12.
In the sealing device 30, the resin film 20 is welded to the outer side in the axial direction of the front end portion of the seal member 15, and the resin film 20 extends toward the inner ring 12 and toward the outer side in the axial direction and is brought into close contact with the outer periphery of the inner ring 12. The inside of the bearing 10 is sealed.

これにより、深溝玉軸受10は、シール部材15と内輪12との間にラビリンス隙間17を構成することで、外部からの異物の侵入を抑制し、シール凸部15aによってラビリンス隙間17の入口が狭められているため潤滑剤の漏洩を抑制している。
また、深溝玉軸受10は、深溝玉軸受10を使用開始するまでの間は、樹脂フィルム20が内輪12に密着されて深溝玉軸受10の内部を密封している。
As a result, the deep groove ball bearing 10 forms a labyrinth gap 17 between the seal member 15 and the inner ring 12, thereby suppressing the entry of foreign matter from the outside, and the entrance of the labyrinth gap 17 is narrowed by the seal convex portion 15a. Therefore, leakage of lubricant is suppressed.
Further, in the deep groove ball bearing 10, the resin film 20 is in close contact with the inner ring 12 until the deep groove ball bearing 10 starts to be used to seal the inside of the deep groove ball bearing 10.

図2は、本発明の実施形態の図1における樹脂フィルム20周辺の部分拡大断面図であり、深溝玉軸受10を使用開始するまでの間の状態を表した図である。深溝玉軸受10は、シール部材15の先端部の軸方向外側のシール溶着部15bと薄膜の樹脂フィルム20の樹脂フィルム溶着部20aとが溶着され、樹脂フィルム20は内輪12方向且つ軸方向外側に向けて延出し、径方向先端近傍且つ軸方向内側の樹脂フィルム先端部20bに粘着剤(粘着層)18が塗布されている。深溝玉軸受10は、樹脂フィルム先端部20bと、内輪12の軌道面外周の軸方向端部の頂点P1が環状となる線から外側の外周の粘着部12bとが粘着剤18により密着されて深溝玉軸受10の内部を密封している。   FIG. 2 is a partially enlarged cross-sectional view around the resin film 20 in FIG. 1 according to the embodiment of the present invention, and shows a state until the deep groove ball bearing 10 is started to be used. In the deep groove ball bearing 10, a seal weld portion 15 b on the outer side in the axial direction of the front end portion of the seal member 15 and a resin film weld portion 20 a of the thin resin film 20 are welded, and the resin film 20 is directed in the inner ring 12 direction and the axially outer side. The pressure-sensitive adhesive (adhesive layer) 18 is applied to the resin film tip 20b in the vicinity of the radial tip and inside in the axial direction. In the deep groove ball bearing 10, the resin film front end portion 20b and the adhesive portion 12b on the outer periphery from the line in which the apex P1 of the axial end of the raceway surface outer periphery of the inner ring 12 is annular are in close contact with the adhesive 18 to the deep groove. The inside of the ball bearing 10 is sealed.

これにより、深溝玉軸受10は、深溝玉軸受10を使用開始するまでの間、深溝玉軸受10の内部を密封し確実に異物の侵入を防止することができる。   Thereby, until the deep groove ball bearing 10 starts use, the deep groove ball bearing 10 can seal the inside of the deep groove ball bearing 10 and reliably prevent foreign matter from entering.

図3は、本発明の実施形態の図2における樹脂フィルム20のA矢視図であり、深溝玉軸受10を使用開始するまでの間の状態を表した図である。樹脂フィルム20は、樹脂フィルム溶着部20aと図2に示すシール部材15のシール溶着部15bとが溶着され、樹脂フィルム先端部20bと図2に示す内輪12の粘着部12bとが粘着剤18により密着されて深溝玉軸受10の内部を密封している。樹脂フィルム20は、切れ目21が径方向途中の途中位置20dから径方向に回転輪側端部の樹脂フィルム端部20eまで、且つ樹脂フィルム20の表裏を貫通しないで軸方向内側に、且つ、周方向に略等配に12個形成される(第1状態)。   FIG. 3 is a view taken along the arrow A of the resin film 20 in FIG. 2 according to the embodiment of the present invention, and shows a state until the deep groove ball bearing 10 is started to be used. The resin film 20 has a resin film welded portion 20a and a seal welded portion 15b of the seal member 15 shown in FIG. 2 welded, and the resin film tip 20b and the adhesive portion 12b of the inner ring 12 shown in FIG. The inside of the deep groove ball bearing 10 is tightly sealed. The resin film 20 has an incision 21 from the midway position 20d in the radial direction to the resin film end 20e at the end of the rotating wheel in the radial direction, axially inward without penetrating the front and back of the resin film 20, and Twelve are formed in the direction substantially equally (first state).

図4は、本発明の実施形態の図1における樹脂フィルム20周辺の部分拡大断面図であり、深溝玉軸受10の使用開始時の状態を表した図である。深溝玉軸受10は、図1に示す外輪11に対して内輪12が相対回転した際に、樹脂フィルム先端部20bと、内輪12の外周の粘着部12bとが粘着剤18により密着されていた状態から、離反し、樹脂フィルム20は切れ目21が切断され、樹脂フィルム先端部20bが軸方向外側に渦巻き状に巻き上げられて巻上げ部20cが形成されて離反した状態を維持する。   FIG. 4 is a partially enlarged cross-sectional view around the resin film 20 in FIG. 1 according to the embodiment of the present invention, and shows a state at the start of use of the deep groove ball bearing 10. In the deep groove ball bearing 10, when the inner ring 12 rotates relative to the outer ring 11 shown in FIG. 1, the resin film tip 20 b and the adhesive portion 12 b on the outer periphery of the inner ring 12 are in close contact with the adhesive 18. Then, the cut 21 is cut in the resin film 20, and the resin film tip 20b is spirally wound outward in the axial direction to form a wound-up portion 20c to maintain the separated state.

これにより、深溝玉軸受10は、使用開始以降、シール部材15と内輪12との間にラビリンス隙間17を確保できる。
また、深溝玉軸受10は、使用開始以降、樹脂フィルム先端部20bに塗布されている粘着剤18が渦巻き状内に移るので、深溝玉軸受10の内部への粘着剤18の侵入を防止できる。
Thereby, the deep groove ball bearing 10 can ensure the labyrinth gap 17 between the seal member 15 and the inner ring 12 after the start of use.
Moreover, since the adhesive 18 applied to the resin film tip 20b moves into the spiral shape after the start of use, the deep groove ball bearing 10 can prevent the adhesive 18 from entering the deep groove ball bearing 10.

図5は、本発明の実施形態の図4における樹脂フィルム20のB矢視図であり、深溝玉軸受10の使用開始時の状態を表した図である。樹脂フィルム20は、樹脂フィルム溶着部20aと図4に示すシール部材15のシール溶着部15bとが溶着されている。樹脂フィルム20は、切れ目21が切断され、樹脂フィルム20が外部から力が加わらない状態に復元する、即ち樹脂フィルム端部20eから途中位置20dまで渦巻き状に巻き上げられて巻上げ部20cが形成される(第2状態)。   FIG. 5 is a B arrow view of the resin film 20 in FIG. 4 according to the embodiment of the present invention, and shows a state when the deep groove ball bearing 10 is started to be used. The resin film 20 has a resin film welded portion 20a and a seal welded portion 15b of the seal member 15 shown in FIG. The resin film 20 is cut in the cut line 21 and restored to a state in which no force is applied from the outside. That is, the resin film 20 is wound up spirally from the resin film end 20e to the middle position 20d to form a wound-up portion 20c. (Second state).

以上のように、本実施の形態に係る深溝玉軸受10によれば、深溝玉軸受10を使用開始するまでの間は、シール部材15に溶着された樹脂フィルム20の樹脂フィルム先端部20bと、内輪12の外周の粘着部12bとが粘着剤18により密着されて深溝玉軸受10の内部を密封しているので、深溝玉軸受10の内部への異物の侵入を確実に防止できる。
また、深溝玉軸受10は、深溝玉軸受10を使用開始時、即ち外輪11に対して内輪12が相対回転した際に、樹脂フィルム先端部20bと、内輪12の外周の粘着部12bとが粘着剤18により密着されていた状態から、離反し、樹脂フィルム20は切れ目21が切断され、樹脂フィルム先端部20bが軸方向外側に渦巻き状に巻き上げられて巻上げ部20cが形成されて離反した状態を維持する。これにより、深溝玉軸受10は、使用開始以降、シール部材15と内輪12との間にラビリンス隙間17を確保できる。
さらに、深溝玉軸受10は、深溝玉軸受10を使用開始以降、樹脂フィルム先端部20bに塗布されている粘着剤18が渦巻き状内に移るので、深溝玉軸受10の内部への粘着剤18の侵入を防止できる。
これらにより、深溝玉軸受10の軌道面の損傷を低減できる。
As described above, according to the deep groove ball bearing 10 according to the present embodiment, until the deep groove ball bearing 10 starts to be used, the resin film tip 20b of the resin film 20 welded to the seal member 15; Since the adhesive portion 12b on the outer periphery of the inner ring 12 is brought into close contact with the adhesive 18 to seal the inside of the deep groove ball bearing 10, entry of foreign matter into the deep groove ball bearing 10 can be reliably prevented.
Further, when the deep groove ball bearing 10 starts use, that is, when the inner ring 12 rotates relative to the outer ring 11, the deep groove ball bearing 10 adheres to the resin film tip 20b and the adhesive part 12b on the outer periphery of the inner ring 12. The resin film 20 is separated from the state in which it is in close contact with the agent 18, and the cut 21 is cut in the resin film 20, and the resin film tip 20b is spirally wound outward in the axial direction to form a wound-up portion 20c. maintain. Thereby, the deep groove ball bearing 10 can ensure the labyrinth gap 17 between the seal member 15 and the inner ring 12 after the start of use.
Furthermore, since the adhesive 18 applied to the resin film tip 20b moves into a spiral shape after the deep groove ball bearing 10 starts to be used, the deep groove ball bearing 10 moves the adhesive 18 into the deep groove ball bearing 10 inside. Intrusion can be prevented.
As a result, damage to the raceway surface of the deep groove ball bearing 10 can be reduced.

また、深溝玉軸受10は、使用開始以降、樹脂フィルム20が深溝玉軸受10の側面から突き出さないため、深溝玉軸受10を使用する装置への組み込み時に突き出しの影響を考慮する必要がなく、組み込み時の自由度を高めることができる。   In addition, since the deep groove ball bearing 10 does not protrude from the side surface of the deep groove ball bearing 10 after the start of use, it is not necessary to consider the influence of the protrusion when the deep groove ball bearing 10 is incorporated into a device that uses the deep groove ball bearing 10. The degree of freedom during installation can be increased.

なお、上記実施形態では、転がり軸受として深溝玉軸受10を例示したが、しかし、これに限らず、円錐ころ軸受などのころ軸受にも適用可能である。   In the above-described embodiment, the deep groove ball bearing 10 is exemplified as the rolling bearing. However, the present invention is not limited to this and can be applied to a roller bearing such as a tapered roller bearing.

また、上記実施形態では、転動体としての玉が単列の軸受を例示したが、しかし、これに限らず、転動体が複列の軸受にも適用可能である。   Moreover, in the said embodiment, the ball | bowl as a rolling element illustrated the single row bearing, However, It is applicable not only to this but a rolling element to a double row bearing.

さらに、上記実施形態では、転がり軸受として内輪が回転輪、外輪が固定輪となる構成を例示したが、しかし、これに限らず、外輪が回転輪、内輪が固定輪となる構成の軸受にも適用可能である。   Furthermore, in the above-described embodiment, the configuration in which the inner ring is a rotating ring and the outer ring is a fixed ring is illustrated as a rolling bearing, but the present invention is not limited to this, and the bearing is also configured to have an outer ring as a rotating ring and an inner ring as a fixed ring. Applicable.

また、上記実施形態では、粘着剤18が樹脂フィルム20の樹脂フィルム先端部20bに塗布される構成を例示したが、しかし、これに限らず、内輪12の粘着部12bに塗布される構成、及び樹脂フィルム先端部20bと粘着部12bとのいずれにも塗布される構成にも適用可能である。   Moreover, in the said embodiment, although the structure in which the adhesive 18 was apply | coated to the resin film front-end | tip part 20b of the resin film 20, not only this but the structure apply | coated to the adhesive part 12b of the inner ring 12, and The present invention can also be applied to a configuration in which the resin film tip 20b and the adhesive part 12b are applied.

さらに、上記実施形態では、内輪12の粘着部12bがシール部材15に対向する位置となる構成を例示したが、しかし、これに限らず、内輪12の側面に粘着部を設ける構成にも適用可能である。   Furthermore, in the said embodiment, although the structure which the adhesion part 12b of the inner ring | wheel 12 becomes a position which opposes the sealing member 15 was illustrated, it is applicable not only to this but the structure which provides an adhesion part in the side surface of the inner ring | wheel 12 It is.

また、上記実施形態では、樹脂フィルム20の切れ目21は周方向に略等配に12個形成される構成を例示したが、しかし、これに限らず、例えば周方向に略等配に16個形成される構成にも適用可能であり、適宜決定すればよい。   Moreover, in the said embodiment, although the structure which formed 12 cut | interruptions 21 of the resin film 20 at substantially equal distribution in the circumferential direction was illustrated, it is not restricted to this, for example, 16 is formed at substantially equal distribution in the circumferential direction. The present invention can also be applied to the configuration to be determined, and may be determined as appropriate.

10:深溝玉軸受(転がり軸受)、 11:外輪(固定輪)、 11b:外輪シール溝、 12:内輪(回転輪)、 12b:粘着部、 13:玉、 14:保持器、 15:シール部材、 15a:シール凸部、 15b:シール溶着部、 16:芯金、 17:ラビリンス隙間、 18:粘着剤(粘着層)、 20:樹脂フィルム、 20a:樹脂フィルム溶着部、 20b:樹脂フィルム先端部、 20c:巻上げ部、 20d:途中位置、 20e:樹脂フィルム端部、 21:切れ目、 30:密封装置、 P1:頂点 10: Deep groove ball bearing (rolling bearing), 11: Outer ring (fixed ring), 11b: Outer ring seal groove, 12: Inner ring (rotating ring), 12b: Adhesive part, 13: Ball, 14: Cage, 15: Seal member 15a: seal convex part, 15b: seal welded part, 16: cored bar, 17: labyrinth gap, 18: adhesive (adhesive layer), 20: resin film, 20a: resin film welded part, 20b: resin film tip part 20c: winding part, 20d: halfway position, 20e: resin film edge, 21: cut, 30: sealing device, P1: apex

Claims (1)

外径面に軌道面が形成された内輪と、
内径面に軌道面が形成された外輪と、
前記内輪と前記外輪との間の環状空間を密封する密封装置と、を備え、
前記内輪及び前記外輪は、いずれか一方が回転輪となり他方が固定輪となり、
前記密封装置は、前記回転輪と前記固定輪との間に配置され、前記固定輪の軌道面側外周の軸方向端部の周面に嵌合装着され、前記嵌合装着側に対向する前記回転輪の軸方向端部に向けて延出し、前記延出側の先端部と前記回転輪の軸方向端部近傍の外周との間にラビリンス隙間が形成される環状のシール部材を有する転がり軸受において、
前記密封装置は、
前記シール部材の前記延出側先端近傍の軸方向外側に溶着され、前記回転輪方向且つ軸方向外側に向けて延出する環状の樹脂フィルムと、
前記樹脂フィルムの径方向先端近傍且つ軸方向内側と、前記回転輪の軌道面側外周の軸方向端部の頂点が環状となる線から側面までの外周とを密着する環状の粘着層と、を有し、
前記樹脂フィルムは、
径方向途中から径方向に前記回転輪側端部まで且つ周方向に略等配に形成され、前記樹脂フィルムの表裏を貫通しない複数の切れ目が軸方向内側に設けられ、
前記切れ目が形成される第1状態と、
前記切れ目が切断され、前記回転輪側端部が軸方向外側に渦巻き状に巻き上げられる第2状態と、をとり、
前記転がり軸受の前記固定輪と前記回転輪との相対回転時に、前記樹脂フィルムと前記回転輪との間の前記粘着層が粘着状態から離反し、前記樹脂フィルムが前記第2状態をとり、前記ラビリンス隙間を形成することを特徴とする転がり軸受。
An inner ring with a raceway surface formed on the outer diameter surface;
An outer ring having a raceway surface on the inner diameter surface;
A sealing device for sealing an annular space between the inner ring and the outer ring,
One of the inner ring and the outer ring is a rotating wheel and the other is a fixed ring,
The sealing device is disposed between the rotating wheel and the fixed wheel, and is fitted and mounted on a peripheral surface of an axial end of the fixed ring on the raceway surface side, and faces the fitting and mounting side. A rolling bearing having an annular seal member extending toward the axial end of the rotating wheel and having a labyrinth gap formed between the extending end and the outer periphery in the vicinity of the axial end of the rotating wheel In
The sealing device includes:
An annular resin film that is welded to the outside in the axial direction in the vicinity of the extending end of the seal member, and extends toward the rotating wheel and the outside in the axial direction;
An annular adhesive layer that closely contacts the outer periphery from the line to the side surface in the vicinity of the radial tip of the resin film and the axially inner side, and the apex of the axial end of the raceway surface side outer periphery of the rotating wheel is an annular shape. Have
The resin film is
From the middle in the radial direction to the end portion on the rotating wheel side in the radial direction and in the circumferential direction, is formed substantially equally, a plurality of cuts that do not penetrate the front and back of the resin film is provided on the inner side in the axial direction,
A first state in which the cut is formed;
Taking the second state in which the cut is cut and the rotating wheel side end is spirally wound outward in the axial direction;
At the time of relative rotation between the fixed ring and the rotating ring of the rolling bearing, the adhesive layer between the resin film and the rotating ring is separated from the adhesive state, the resin film takes the second state, A rolling bearing characterized by forming a labyrinth gap.
JP2011062349A 2011-03-22 2011-03-22 Rolling bearing Withdrawn JP2012197867A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2538042A (en) * 2014-11-28 2016-11-09 Skf Ab Sealed bearing
CN108317175A (en) * 2017-12-20 2018-07-24 安徽日飞轴承有限公司 Bearing outer ring, dustproof cover and its application in deep groove ball bearing
US11300158B2 (en) * 2019-07-12 2022-04-12 Aktiebolaget Skf Small cross-section bearing unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2538042A (en) * 2014-11-28 2016-11-09 Skf Ab Sealed bearing
CN108317175A (en) * 2017-12-20 2018-07-24 安徽日飞轴承有限公司 Bearing outer ring, dustproof cover and its application in deep groove ball bearing
US11300158B2 (en) * 2019-07-12 2022-04-12 Aktiebolaget Skf Small cross-section bearing unit

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