JPH08177870A - Sealing structure of resin-make roller bearing - Google Patents

Sealing structure of resin-make roller bearing

Info

Publication number
JPH08177870A
JPH08177870A JP6324131A JP32413194A JPH08177870A JP H08177870 A JPH08177870 A JP H08177870A JP 6324131 A JP6324131 A JP 6324131A JP 32413194 A JP32413194 A JP 32413194A JP H08177870 A JPH08177870 A JP H08177870A
Authority
JP
Japan
Prior art keywords
resin
shield plate
bearing
ring
shoulder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP6324131A
Other languages
Japanese (ja)
Inventor
Hiromitsu Kondo
博光 近藤
Michiyoshi Ishimaru
路芳 石丸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP6324131A priority Critical patent/JPH08177870A/en
Publication of JPH08177870A publication Critical patent/JPH08177870A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16C33/767—Sealings of ball or roller bearings integral with the race
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • 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
    • 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
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/40—Imides, e.g. polyimide [PI], polyetherimide [PEI]
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/80—Thermosetting resins

Landscapes

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

Abstract

PURPOSE: To eliminate a problem such as breakage of bearing ring in installing a shield plate on a resin bearing. CONSTITUTION: A resin-make roller bearing is provided with an inner ring 1 and an outer ring 2 formed of a synthetic resin with self-lubricity such as polyimid or COPNA resin(condensed polynuclear aromatic resin), multiple balls 3 provided between the inner and outer rings 1 and 2, and a resin shield plate 4 fitted closely into one shoulder part 2a of the outer ring 2.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、内輪および外輪のうち
少なくとも一方を、自己潤滑性を有する合成樹脂で形成
した樹脂製転がり軸受の密封構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing structure for a resin rolling bearing in which at least one of an inner ring and an outer ring is made of a synthetic resin having a self-lubricating property.

【０００２】[0002]

【従来の技術】潤滑剤としてグリースを使用する転がり
軸受では、グリースの飛散防止等のため、図５に示すよ
うに、両端部に金属製のシールド板１５を設ける場合が
ある。例えば、クリーンルーム等の高清浄環境下で運転
される軸受では、軸受からの発塵を抑えるために、密封
構造としてシールド板を配置するのが一般的になってい
る。特に、半導体製造用の真空機器等に装備される軸受
では、発塵の抑制だけでなく、取扱い上の都合（ドライ
バー等の治工具を軸受内部に誤って差し込む事態を防止
する等）からシールド板を用いた軸受が主流になってい
る。2. Description of the Related Art In a rolling bearing using grease as a lubricant, metal shield plates 15 may be provided at both ends as shown in FIG. 5 in order to prevent the grease from scattering. For example, in a bearing that is operated in a highly clean environment such as a clean room, a shield plate is generally arranged as a sealed structure in order to suppress dust generation from the bearing. Especially for bearings installed in vacuum equipment for semiconductor manufacturing, in addition to suppressing dust generation, the shield plate is used not only for handling convenience (to prevent accidental insertion of a jig or tool such as a screwdriver into the bearing). Bearings that use are becoming mainstream.

【０００３】[0003]

【発明が解決しようとする課題】ところで、シールド板
１５を設置するためには、内・外輪１６、１７の肩部１
８ａ、１８ｂにシール溝１９やシール取付溝２０等の環
状溝を設ける必要がある。一般の鋼製軸受では、このよ
うな環状溝等を設けても特に問題は生じないが、軌道輪
を合成樹脂で形成した樹脂製軸受では、溝加工による薄
肉化によって軌道輪に欠け等が発生し易くなる問題があ
る。By the way, in order to install the shield plate 15, the shoulder portions 1 of the inner and outer rings 16 and 17 are to be installed.
It is necessary to provide annular grooves such as the seal groove 19 and the seal mounting groove 20 in 8a and 18b. With ordinary steel bearings, there is no particular problem even if such an annular groove is provided, but with resin bearings in which the bearing ring is made of synthetic resin, chipping etc. occurs in the bearing ring due to thinning due to groove processing. There is a problem that it is easy to do.

【０００４】本発明は、樹脂製軸受にシールド板を設け
るにあたって、上記のような軌道輪の欠け等の問題を解
消することにある。The present invention is to eliminate the above-mentioned problems such as the loss of the bearing ring when the resin bearing is provided with the shield plate.

【０００５】[0005]

【課題を解決するための手段】上記目的の達成のため、
本発明では、自己潤滑性を有する合成樹脂からなる軌道
輪の肩部に、合成樹脂からなる環状のシールド板を嵌合
固定した。[Means for Solving the Problems] To achieve the above object,
In the present invention, the annular shield plate made of synthetic resin is fitted and fixed to the shoulder portion of the bearing ring made of synthetic resin having self-lubricating property.

【０００６】また、自己潤滑性を有する合成樹脂からな
る軌道輪の一方の肩部に、合成樹脂からなる環状のシー
ルド板を嵌合固定すると共に、上記軌道輪の他方の肩部
およびこれに対向する他方の軌道輪の肩部のうち少なく
とも一方を相手側に延在させて、両者の間にシール隙間
を設けた。Further, an annular shield plate made of synthetic resin is fitted and fixed to one shoulder portion of the bearing ring made of a synthetic resin having self-lubricating property, and the other shoulder portion of the bearing ring and the opposite face thereof are opposed to the shoulder portion. At least one of the shoulder portions of the other bearing ring is extended to the other side, and a seal gap is provided between the two.

【０００７】さらに、両軌道輪の対向する肩部間にシー
ル隙間を設けた構成において、両軌道輪の軌道面の溝底
中心を軸受中央から反シールド板側にオフセットさせ
た。Further, in the structure in which the seal gap is provided between the facing shoulder portions of both races, the center of the groove bottom of the raceway surface of both races is offset from the center of the bearing to the side opposite to the shield plate.

【０００８】自己潤滑性を有する合成樹脂としては、ポ
リイミド、コプナ樹脂を使用するのが望ましい。ポリイ
ミドやコプナ樹脂には、充填材として黒鉛やＰＴＦＥ等
を配合したものも含む。As the synthetic resin having self-lubricating property, it is desirable to use polyimide or coplanar resin. The polyimide and coplanar resin also include those in which graphite, PTFE or the like is mixed as a filler.

【０００９】ここで、「コプナ樹脂」は、ナフタレン、
アントラセン、フェナントレン、ピレン、コールタール
ピッチ等の多環芳香族炭化水素を酸触媒によりパラキシ
リレングリコールで架橋した熱硬化性樹脂である。縮合
多環多核芳香族樹脂”Condensed Polynuclear Aromatic
Resin” と命名され、略称として、下線部を集めて「Ｃ
ＯＰＮＡ樹脂」と呼ばれている。コプナ樹脂は、耐熱
性、摺動特性、機械特性、耐薬品性にすぐれ、かつ、易
成形加工性、コストパーフォーマンスを兼ね備えてい
る。Here, "copna resin" means naphthalene,
It is a thermosetting resin obtained by crosslinking polycyclic aromatic hydrocarbons such as anthracene, phenanthrene, pyrene, and coal tar pitch with paraxylylene glycol using an acid catalyst. Condensed Polynuclear Aromatic
It is named "Resin", and as an abbreviation, the underlined parts are collected and
It is called "OPNA resin". Copna resin has excellent heat resistance, sliding characteristics, mechanical characteristics, and chemical resistance, and also has easy moldability and cost performance.

【００１０】[0010]

【作用】内輪および外輪のうち少なくとも一方の軌道輪
を、自己潤滑性を有する合成樹脂で形成した樹脂製転が
り軸受においては、ＰＴＦＥ等の潤滑剤が不要である。
樹脂製軌道輪と転動体との接触によって、転動体の表面
や軌道面に転着被膜が形成されることにより、十分な潤
滑がなされ、かつ、低発塵である。In a resin rolling bearing in which at least one of the inner ring and the outer ring is made of a synthetic resin having a self-lubricating property, a lubricant such as PTFE is unnecessary.
By the contact between the resin race ring and the rolling element, a transfer film is formed on the surface of the rolling element and the raceway surface, whereby sufficient lubrication is achieved and low dust generation is achieved.

【００１１】上記のような樹脂製転がり軸受において、
樹脂製軌道輪の肩部に、樹脂製シールド板を嵌合固定し
た構成とすることにより、両者の弾性を利用して、シー
ルド板を固定することができるので、シール取付溝等の
環状溝を軌道輪に設ける必要がなくなる。In the resin rolling bearing as described above,
By configuring the resin shield plate to be fitted and fixed to the shoulder portion of the resin bearing ring, the elasticity of both can be used to fix the shield plate. It is not necessary to install it on the bearing ring.

【００１２】上記構成の密封構造は軸受の両端部側に設
けても良いが、一方の端部側にのみ設ける場合は、他方
の端部側は、両軌道輪の対向した肩部のうち少なくとも
一方を相手側に延在させて、両者の間にシール隙間を設
けた構成とすると良い。これにより、軸受の一方の端部
側は外輪の肩部に嵌合固定されたシールド板により、他
方の端部側はシール隙間を隔てて対向した肩部間によっ
てシールされる。また、シールド板を固定する側の端部
（一方の端部）から、内・外輪間に保持器を組み込むこ
とも可能になる。The sealing structure of the above construction may be provided on both end sides of the bearing, but when it is provided only on one end side, the other end side is at least one of the facing shoulder portions of both races. It is advisable to extend one side to the other side and provide a seal gap between them. As a result, one end of the bearing is sealed by the shield plate fitted and fixed to the shoulder of the outer ring, and the other end of the bearing is sealed by the shoulders facing each other with a seal gap. It is also possible to incorporate a cage between the inner and outer rings from the end (one end) on the side where the shield plate is fixed.

【００１３】両軌道輪の対向する肩部間にシール隙間を
設けた構成において、両軌道輪の軌道面の溝底中心を軸
受中央から反シールド板側（他方の端部側）にオフセッ
トさせることにより、軸受の全幅寸法を増大させること
なく、シールド板を固定する一方の肩部側のスペースを
拡大することができる。そのため、一方の肩部の内径に
止め輪溝や、シール取付溝等の環状溝を形成した場合で
も、環状溝の溝肩の肉厚を充分に確保することができる
ので、樹脂製軌道輪の欠け等の問題が生じにくい。In a structure in which a seal gap is provided between the opposite shoulders of both races, the center of the groove bottom of the raceways of both races is offset from the bearing center to the side opposite to the shield plate (the other end). Thus, the space on the one shoulder side for fixing the shield plate can be expanded without increasing the overall width of the bearing. Therefore, even if a retaining ring groove or an annular groove such as a seal mounting groove is formed on the inner diameter of one of the shoulder portions, the wall thickness of the groove shoulder of the annular groove can be sufficiently secured, so Problems such as chipping are unlikely to occur.

【００１４】ポリイミド、コプナ樹脂は、耐熱性、摺動
特性、機械特性等に優れた材料であり、これら合成樹脂
で軌道輪を形成することにより、軸受の潤滑性、耐久
性、低発塵性等を確保することができる。特に、コプナ
樹脂は、易成形加工性、コストパーフォーマンに優れて
いるので、コスト低減に有利である。Polyimide and coplanar resins are materials having excellent heat resistance, sliding properties, mechanical properties, etc. By forming a bearing ring from these synthetic resins, bearing lubricity, durability and low dust generation Etc. can be secured. In particular, the COPNA resin is excellent in moldability and cost performance, and is therefore advantageous in cost reduction.

【００１５】[0015]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.

【００１６】図１に示す樹脂製転がり軸受は、自己潤滑
性を有する合成樹脂例えばポリイミド又はコプナ樹脂で
形成された内輪１および外輪２、内・外輪１、２間に介
在する複数のボール３、外輪２の一方の肩部２ａに嵌合
固定された樹脂製のシールド板４を備えている。ボール
３は、軸受鋼あるいはマルテンサイト系ステンレス鋼で
形成されている。あるいは、ボール３を、セラミックで
形成しても良い。セラミック材はステンレス材に比べて
より小さい線膨張係数を有するので、温度上昇時の軸受
内部隙間の過少を効果的に防止することができる。シー
ルド板４は、内・外輪１、２と同種の合成樹脂（ポリイ
ミド又はコプナ樹脂等）で形成しても良いが、その他の
合成樹脂（自己潤滑性を有しない合成樹脂等）で形成し
ても良い。 シールド板４を外輪２に装着するに際して
は、樹脂製の外輪２およびシールド板４の双方の弾性を
利用して、シールド板４の外径を肩部２ａの内径に嵌合
する。この実施例では、シールド板４の外径に凹部４ａ
を設け、この凹部４ａを、外輪２の肩部２ａの内径に設
けた凸部２ａ１に嵌合してある。外輪２とシールド板４
の双方の弾性により、凹部４ａは凸部２ａ１に容易に嵌
合することができる。また、装着後は、凹部４ａと凸部
２ａ１との嵌合力により、シールド板４は外輪２の肩部
２ａから外れにくい。尚、凹部４ａ、凸部２ａ１の形状
は、双方とも環状、あるいは、凹部４ａが環状で凸部２
ａ１が円周方向に部分的なもの、さらには、双方とも円
周方向に同じ位相をもった部分的なものとすることがで
きる。シールド板４を外輪２の肩部２ａに嵌合固定した
状態において、シールド板４の内径と内輪１の外径との
間には、環状のシール隙間ｄが形成される。このシール
隙間ｄは、図５におけるシール隙間ｄ’と略同じ大きさ
に設定されている。The resin rolling bearing shown in FIG. 1 comprises an inner ring 1 and an outer ring 2, and a plurality of balls 3 interposed between the inner and outer rings 1 and 2, which are made of a synthetic resin having a self-lubricating property, for example, polyimide or Kopuna resin. A resin shield plate 4 fitted and fixed to one shoulder 2a of the outer ring 2 is provided. The balls 3 are made of bearing steel or martensitic stainless steel. Alternatively, the balls 3 may be made of ceramic. Since the ceramic material has a smaller linear expansion coefficient than the stainless steel material, it is possible to effectively prevent the bearing internal clearance from becoming too small when the temperature rises. The shield plate 4 may be formed of the same kind of synthetic resin as the inner and outer rings 1 and 2 (polyimide or coplanar resin), but may be formed of other synthetic resin (synthetic resin having no self-lubricating property). Is also good. When the shield plate 4 is attached to the outer ring 2, the outer diameter of the shield plate 4 is fitted to the inner diameter of the shoulder portion 2a by utilizing the elasticity of both the resin outer ring 2 and the shield plate 4. In this embodiment, the recess 4a is formed on the outer diameter of the shield plate 4.
And the concave portion 4a is fitted to the convex portion 2a1 provided on the inner diameter of the shoulder portion 2a of the outer ring 2. Outer ring 2 and shield plate 4
Due to the elasticity of both of the above, the concave portion 4a can be easily fitted into the convex portion 2a1. Further, after mounting, the shield plate 4 is less likely to come off the shoulder portion 2a of the outer ring 2 due to the fitting force between the concave portion 4a and the convex portion 2a1. The concave portions 4a and the convex portions 2a1 are both annular in shape, or the concave portions 4a are annular in shape.
a1 can be partial in the circumferential direction, and further, both can be partial with the same phase in the circumferential direction. An annular seal gap d is formed between the inner diameter of the shield plate 4 and the outer diameter of the inner ring 1 when the shield plate 4 is fitted and fixed to the shoulder portion 2a of the outer ring 2. The seal gap d is set to have substantially the same size as the seal gap d'in FIG.

【００１７】上記のようなシールド板４は両端部側に装
着しても良いが、この実施例では、一方の端部側にのみ
装着し、他方の端部側においては、外輪２の他方の肩部
２ｂを内輪１に向けて延設し、肩部２ｂの内径と内輪１
の外径との間に環状のシール隙間ｄを設けている。この
シール隙間ｄも、図５におけるシール隙間ｄ’と略同じ
大きさに設定されている。The shield plate 4 as described above may be mounted on both end sides, but in this embodiment, it is mounted only on one end side and the other end side of the outer ring 2 is mounted on the other end side. The shoulder portion 2b extends toward the inner ring 1, and the inner diameter of the shoulder portion 2b and the inner ring 1
An annular seal gap d is provided between the outer diameter and the outer diameter. The seal gap d is also set to have substantially the same size as the seal gap d'in FIG.

【００１８】上記構成により、軸受の一方の端部側は外
輪２の肩部２ａに嵌合固定されたシールド板４により、
他方の端部側は内輪１に向けて延設された外輪２の肩部
２ｂによりシールされる。従って、軸受内からの発塵や
軸受外からの固形異物（治工具等を含む）の侵入等を防
止することが可能となる。With the above construction, one end of the bearing is shielded by the shield plate 4 fitted and fixed to the shoulder 2a of the outer ring 2.
The other end portion side is sealed by a shoulder portion 2b of an outer ring 2 extending toward the inner ring 1. Therefore, it is possible to prevent dust generation from the inside of the bearing and intrusion of solid foreign matter (including jigs and tools) from the outside of the bearing.

【００１９】図２に示す実施例では、樹脂製のシールド
板４がコ字形断面をなしている。また、外輪２のみが自
己潤滑性を有する合成樹脂で形成され、内輪１は軸受鋼
あるいはマルテンサイト系ステンレス鋼で形成されてい
る。さらに、シールド板４の外径に凸部４ａ’が設けら
れ、この凸部４ａ’が、外輪２の肩部２ａの内径に設け
られた凹部２ａ１’に嵌合されている。シールド板４の
凸部４ａ’は、コ字形空間を構成する外径壁４ｂの外径
に設けられている。凸部４ａ’、凹部２ａ１’の形状
は、双方とも環状、あるいは、凹部２ａ１’が環状で凸
部４ａ’が円周方向に部分的なもの、さらには、双方と
も円周方向に同じ位相をもった部分的なものとすること
ができる。In the embodiment shown in FIG. 2, the resin shield plate 4 has a U-shaped cross section. Further, only the outer ring 2 is made of a synthetic resin having a self-lubricating property, and the inner ring 1 is made of bearing steel or martensitic stainless steel. Further, a convex portion 4a ′ is provided on the outer diameter of the shield plate 4, and this convex portion 4a ′ is fitted into a concave portion 2a1 ′ provided on the inner diameter of the shoulder portion 2a of the outer ring 2. The convex portion 4a ′ of the shield plate 4 is provided on the outer diameter of the outer diameter wall 4b forming the U-shaped space. The shapes of the convex portion 4a 'and the concave portion 2a1' are both annular, or the concave portion 2a1 'is annular and the convex portion 4a' is partial in the circumferential direction, and both have the same phase in the circumferential direction. It can be partial.

【００２０】シールド板４を外輪２に装着するに際、シ
ールド板４の外径壁４ｂがコ字形空間側に弾性変形する
ため、シールド板４の装着作業が一層容易化される。ま
た、シールド板４の弾性変形能が向上することにより、
シールド板４の軸方向寸法を大きくとることができるの
で、シール性の向上にもなる。その他の基本的な構成及
び作用効果は、図１に示すものと同様である。When the shield plate 4 is mounted on the outer ring 2, the outer diameter wall 4b of the shield plate 4 elastically deforms toward the U-shaped space, so that the work of mounting the shield plate 4 is further facilitated. Further, since the elastic deformability of the shield plate 4 is improved,
Since the axial dimension of the shield plate 4 can be increased, the sealing property can be improved. Other basic configurations and operational effects are similar to those shown in FIG.

【００２１】尚、図１および図２に示す実施例の樹脂製
転がり軸受は、基本的には、樹脂製の外輪２と樹脂製の
シールド板４の双方の弾性を利用して、シールド板４の
固定を行なうものであり、図５におけるシール取付溝２
０等は備えていない。また、これら実施例における凸部
２ａ１（４ａ’）および凹部４ａ（２ａ１’）は、シー
ルド板４の固定状態を安定ならしめるためのいわば補強
的手段として有効なものであり、それ程大きな寸法のも
のである必要はない。従って、シールド板４の設置に伴
う外輪２および内輪１（図５におけるシール溝１９を設
けていないため。）の欠け等の問題は生じない。The resin rolling bearings of the embodiments shown in FIGS. 1 and 2 basically use the elasticity of both the resin outer ring 2 and the resin shield plate 4 to make use of the shield plate 4 The seal mounting groove 2 in FIG.
0 is not provided. Further, the convex portion 2a1 (4a ') and the concave portion 4a (2a1') in these embodiments are effective as a so-called reinforcing means for stabilizing the fixed state of the shield plate 4, and have such a large size. Does not have to be. Therefore, problems such as chipping of the outer ring 2 and the inner ring 1 (because the seal groove 19 in FIG. 5 is not provided) due to the installation of the shield plate 4 do not occur.

【００２２】図３に示す実施例も、以上の実施例と同様
に、自己潤滑性を有する合成樹脂からなる外輪２の肩部
２ａの内径に、樹脂製のシールド板４を嵌合固定したも
のであるが、シールド板４を固定するために、止め輪５
を用いている。この実施例において、止め輪５は、外輪
２の肩部２ａの内径に設けられた環状の止め輪溝２ａ２
に嵌着され、シールド板４は、この止め輪５と、肩部２
ａの内径に設けられた段部２ａ３との間で固定される。
そして、止め輪溝５の形成に伴う外輪２の欠け等を防止
するため、内・外輪１、２の軌道面の溝底Ｘを軸受中央
Ｙから他方の端部（シールド板４を装着しない側の端
部）側に所定量Ｓだけ軸方向にオフセットさせ、軸受の
全幅寸法を増大させることなく、止め輪溝５を形成する
ための充分なスペースを確保している。尚、この実施例
では、内・外輪１、２の双方を自己潤滑性を有する合成
樹脂で形成すると共に、外輪２の他方の端部２ｂと内輪
１の他方の肩部１ｂとを、それぞれ、相手側に延設し
て、シール隙間ｄを設けてある。In the embodiment shown in FIG. 3, as in the above embodiments, a resin shield plate 4 is fitted and fixed to the inner diameter of the shoulder portion 2a of the outer ring 2 made of synthetic resin having self-lubricating property. However, in order to fix the shield plate 4, a snap ring 5
Is used. In this embodiment, the retaining ring 5 is an annular retaining ring groove 2a2 provided in the inner diameter of the shoulder 2a of the outer ring 2.
The shield plate 4 is fitted on the retaining ring 5 and the shoulder portion 2.
It is fixed to the step portion 2a3 provided on the inner diameter of a.
Then, in order to prevent the outer ring 2 from being chipped due to the formation of the retaining ring groove 5, the groove bottoms X of the raceway surfaces of the inner and outer rings 1, 2 from the bearing center Y to the other end (the side where the shield plate 4 is not mounted A sufficient amount of space for forming the retaining ring groove 5 is secured without increasing the overall width dimension of the bearing by offsetting in the axial direction by a predetermined amount S on the side). In this embodiment, both the inner and outer races 1 and 2 are made of synthetic resin having self-lubricating property, and the other end 2b of the outer race 2 and the other shoulder 1b of the inner race 1 are respectively formed. A seal gap d is provided so as to extend to the other side.

【００２３】図１、図２及び図３には、保持器を備えて
いない総玉形式の軸受を例示してあるが、保持器を備え
たものでも良い。保持器（いわゆる王冠型のもの）を装
着する場合は、内・外輪１、２間にボール３を組み入れ
た後、シールド板４の装着前に、軸受の一方の端部（シ
ールド板４を装着する側の端部）から内・外輪１、２間
の環状空間に組み入れる。そして、保持器の組み込み
後、上述した手順で、シールド板４を外輪の肩部２ａに
嵌合固定する。尚、一方の肩部を延設してシール隙間ｄ
を設ける構造の場合は、通常の深溝玉軸受のような組立
はできない。そのため、軸受の一方の端部には、ボール
３を内・外輪１、２間に組み入れるための入れ溝等を設
けておく必要がある。また、シールド板４は、上述した
態様に準じて、内輪１側に固定するようにしても良い。Although FIG. 1, FIG. 2 and FIG. 3 exemplify a full ball type bearing that does not have a retainer, it may have a retainer. When installing a cage (so-called crown type), after inserting the ball 3 between the inner and outer rings 1 and 2, and before installing the shield plate 4, install one end of the bearing (shield plate 4 is installed). (The end on the side of the inner side) that is assembled into the annular space between the inner and outer rings 1, 2. After assembling the cage, the shield plate 4 is fitted and fixed to the shoulder portion 2a of the outer ring by the procedure described above. In addition, one of the shoulders is extended to form a seal gap d.
In the case of the structure provided with, it is not possible to assemble like a normal deep groove ball bearing. Therefore, it is necessary to provide an insertion groove or the like for incorporating the ball 3 between the inner and outer rings 1 and 2 at one end of the bearing. Further, the shield plate 4 may be fixed to the inner ring 1 side according to the above-described aspect.

【００２４】図４に示す実施例は、外輪２の両肩部２
ａ、２ｂの双方を内輪１に向けて延設し、両肩部２ａ、
２ｂの内径と内輪１の外径との間にそれぞれシール隙間
ｄを設けたものである。シールド板は備えていない。内
輪１および外輪２は、コプナ樹脂で形成されている。内
輪１の両肩部１ａ、１ｂを外輪２に向けて延設し、ある
いは、外輪２の両肩部２ａ、２ｂと、内輪１の両肩部１
ａ、１ｂの双方を、それぞれ、相手側に向かって延設し
て、シール隙間ｄを設けても良い。尚、この実施例は、
保持器を備えていない総玉形式の軸受にのみ適用するこ
とができる。In the embodiment shown in FIG. 4, both shoulders 2 of the outer ring 2 are provided.
Both a and 2b are extended toward the inner ring 1, and both shoulders 2a,
A seal gap d is provided between the inner diameter of 2b and the outer diameter of the inner ring 1. It does not have a shield plate. The inner ring 1 and the outer ring 2 are made of Copuna resin. Both shoulders 1a and 1b of the inner ring 1 are extended toward the outer ring 2, or both shoulders 2a and 2b of the outer ring 2 and both shoulders 1 of the inner ring 1 are provided.
Both a and 1b may be extended toward the other side to provide the seal gap d. In this example,
It can only be applied to full-ball type bearings without cages.

【００２５】以上の実施例においては、ポリイミド、コ
プナ樹脂の良好な自己潤滑性に鑑み軸受内には滑剤剤を
封入していないが、必要に応じて内・外輪１、２の軌道
面やボール３の表面にＰＴＦＥ等の固体潤滑被膜を形成
しても良い。もちろん、大気中で使用する場合には、固
体潤滑剤の代わりにグリース等の液体潤滑剤を使用して
も良い。In the above embodiments, the lubricant is not enclosed in the bearing in consideration of the good self-lubricating properties of the polyimide and the COPNA resin, but if necessary, the raceways of the inner and outer rings 1, 2 and balls A solid lubricating coating such as PTFE may be formed on the surface of No. 3. Of course, when used in the atmosphere, a liquid lubricant such as grease may be used instead of the solid lubricant.

【００２６】本発明は、上記に例示した軸受形式に限ら
ず、広く転がり軸受一般に適用可能である。The present invention is not limited to the bearing type exemplified above, but can be widely applied to rolling bearings in general.

【００２７】[0027]

【発明の効果】本発明は、以下に示す効果を有する。The present invention has the following effects.

【００２８】（１）樹脂製軌道輪の肩部に、樹脂製シー
ルド板を嵌合固定した構成とすることにより、両者の弾
性を利用して、シールド板を固定することができるの
で、シール取付溝等の環状溝を軌道輪に設ける必要がな
くなる。したがって、シールド板の設置に伴う環状溝の
形成によって、樹脂製軌道輪に欠け等を生じさせるとい
った心配が解消される。(1) Since the resin shield plate is fitted and fixed to the shoulder portion of the resin bearing ring, the shield plate can be fixed by utilizing the elasticity of both, so that the seal is attached. It is not necessary to provide an annular groove such as a groove on the bearing ring. Therefore, it is possible to eliminate the fear that the resin bearing ring may be chipped due to the formation of the annular groove accompanying the installation of the shield plate.

【００２９】（２）上記シールド板を軸受の一方の端部
側にのみ設置し、他方の端部側は、両軌道輪の対向した
肩部のうち少なくとも一方を相手側に延在させて、両者
の間にシール隙間を設けた構成とすることにより、軸受
の一方の端部側は外輪の肩部に嵌合固定されたシールド
板により、他方の端部側はシール隙間を隔てて対向した
肩部間によってシールされるので、上記（１）と同様の
効果が得られる。(2) The shield plate is installed only on one end side of the bearing, and at the other end side, at least one of the facing shoulder portions of both bearing rings extends to the other side, By providing a seal gap between the two, one end side of the bearing is opposed by a shield plate fitted and fixed to the shoulder portion of the outer ring, and the other end side is opposed with a seal gap. Since the space is sealed between the shoulders, the same effect as the above (1) can be obtained.

【００３０】（３）両軌道輪の対向する肩部間にシール
隙間を設けた構成において、両軌道輪の軌道面の溝底中
心を軸受中央から反シールド板側（他方の端部側）にオ
フセットさせることにより、軸受の全幅寸法を増大させ
ることなく、シールド板を固定する一方の肩部側のスペ
ースを拡大することができる。そのため、一方の肩部の
内径に止め輪溝や、シール取付溝等の環状溝を形成した
場合でも、環状溝の溝肩の肉厚を充分に確保することが
できるので、樹脂製軌道輪の欠け等の問題が生じにく
い。(3) In the structure in which the seal gap is provided between the facing shoulder portions of both races, the center of the groove bottom of the raceway of both races is located from the center of the bearing to the side opposite to the shield plate (the side of the other end). By offsetting, the space on the one shoulder side for fixing the shield plate can be expanded without increasing the overall width dimension of the bearing. Therefore, even if a retaining ring groove or an annular groove such as a seal mounting groove is formed on the inner diameter of one of the shoulder portions, the wall thickness of the groove shoulder of the annular groove can be sufficiently secured, so Problems such as chipping are unlikely to occur.

【００３１】（４）ポリイミド、コプナ樹脂は、耐熱
性、摺動特性、機械特性等に優れた材料であり、これら
合成樹脂で軌道輪を形成することにより、軸受の潤滑
性、耐久性、低発塵性等を確保することができる。特
に、コプナ樹脂は、易成形加工性、コストパーフォーマ
ンに優れているので、コスト低減に有利である。(4) Polyimide and coplanar resins are materials having excellent heat resistance, sliding properties, mechanical properties, etc. By forming a bearing ring from these synthetic resins, the lubricity, durability, and low durability of the bearing are reduced. It is possible to secure dust generation and the like. In particular, the COPNA resin is excellent in moldability and cost performance, and is therefore advantageous in cost reduction.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施例を示す断面図である。FIG. 1 is a sectional view showing an embodiment of the present invention.

【図２】本発明の実施例を示す断面図である。FIG. 2 is a sectional view showing an embodiment of the present invention.

【図３】本発明の実施例を示す断面図である。FIG. 3 is a sectional view showing an embodiment of the present invention.

【図４】本発明の実施例を示す断面図である。FIG. 4 is a sectional view showing an embodiment of the present invention.

【図５】シールド板付軸受の一般的構成を示す断面図で
ある。FIG. 5 is a cross-sectional view showing a general configuration of a bearing with a shield plate.

【符号の説明】[Explanation of symbols]

１ 内輪 １ａ 肩部 １ｂ 肩部 ２ 外輪 ２ａ 肩部 ２ｂ 肩部 ４ シールド板 ｄ シール隙間 1 Inner ring 1a Shoulder 1b Shoulder 2 Outer ring 2a Shoulder 2b Shoulder 4 Shield plate d Seal gap

Claims (5)

【特許請求の範囲】[Claims] 【請求項１】 自己潤滑性を有する合成樹脂からなる軌
道輪の肩部に、合成樹脂からなる環状のシールド板を嵌
合固定したことを特徴とする樹脂製転がり軸受の密封構
造。1. A sealed structure for a resin rolling bearing, wherein an annular shield plate made of synthetic resin is fitted and fixed to a shoulder portion of a bearing ring made of synthetic resin having self-lubricating property. 【請求項２】 自己潤滑性を有する合成樹脂からなる軌
道輪の一方の肩部に、合成樹脂からなる環状のシールド
板を嵌合固定すると共に、上記軌道輪の他方の肩部およ
びこれに対向する他方の軌道輪の肩部のうち少なくとも
一方を相手側に延在させて、両者の間にシール隙間を設
けたことを特徴とする樹脂製転がり軸受の密封構造。2. A ring-shaped shield plate made of synthetic resin is fitted and fixed to one shoulder portion of a bearing ring made of synthetic resin having self-lubricating property, and the other shoulder portion of the bearing ring is opposed to the shoulder portion. At least one of the shoulder portions of the other bearing ring is extended to the other side, and a seal gap is provided between the two, so that a sealing structure for a resin rolling bearing is provided. 【請求項３】 軌道輪の軌道面の溝底中心を軸受中央か
ら反シールド板側にオフセットさせたことを特徴とする
請求項２の樹脂製転がり軸受の密封構造。3. The sealing structure for a resin rolling bearing according to claim 2, wherein the center of the groove bottom of the raceway surface of the bearing ring is offset from the bearing center to the side opposite to the shield plate. 【請求項４】 上記自己潤滑性を有する合成樹脂がポリ
イミドであることを特徴とする請求項１、２又は３の樹
脂製転がり軸受の密封構造。4. The sealing structure for a resin rolling bearing according to claim 1, 2 or 3, wherein the synthetic resin having self-lubricating property is polyimide. 【請求項５】 上記自己潤滑性を有する合成樹脂がコプ
ナ樹脂であることを特徴とする請求項１、２又は３の樹
脂製転がり軸受の密封構造。5. The sealing structure for a resin rolling bearing according to claim 1, wherein the synthetic resin having self-lubricating property is a Kopuna resin.
JP6324131A 1994-12-27 1994-12-27 Sealing structure of resin-make roller bearing Withdrawn JPH08177870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6324131A JPH08177870A (en) 1994-12-27 1994-12-27 Sealing structure of resin-make roller bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6324131A JPH08177870A (en) 1994-12-27 1994-12-27 Sealing structure of resin-make roller bearing

Publications (1)

Publication Number Publication Date
JPH08177870A true JPH08177870A (en) 1996-07-12

Family

ID=18162492

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6324131A Withdrawn JPH08177870A (en) 1994-12-27 1994-12-27 Sealing structure of resin-make roller bearing

Country Status (1)

Country Link
JP (1) JPH08177870A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006300261A (en) * 2005-04-22 2006-11-02 Ntn Corp Ball bearing
JP2006525466A (en) * 2003-04-29 2006-11-09 ザ ビーオーシー グループ ピーエルシー Vacuum pump
US10024364B2 (en) * 2016-01-12 2018-07-17 Schaeffler Technologies AG & Co. KG Integrated plastic shield bearing assembly
CN111911527A (en) * 2020-09-16 2020-11-10 江苏万达特种轴承有限公司 Retainer ring thread locking type bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006525466A (en) * 2003-04-29 2006-11-09 ザ ビーオーシー グループ ピーエルシー Vacuum pump
JP2006300261A (en) * 2005-04-22 2006-11-02 Ntn Corp Ball bearing
US10024364B2 (en) * 2016-01-12 2018-07-17 Schaeffler Technologies AG & Co. KG Integrated plastic shield bearing assembly
CN111911527A (en) * 2020-09-16 2020-11-10 江苏万达特种轴承有限公司 Retainer ring thread locking type bearing

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