JP2002213467A - Sealing device for rolling bearing - Google Patents
Sealing device for rolling bearingInfo
- Publication number
- JP2002213467A JP2002213467A JP2001015406A JP2001015406A JP2002213467A JP 2002213467 A JP2002213467 A JP 2002213467A JP 2001015406 A JP2001015406 A JP 2001015406A JP 2001015406 A JP2001015406 A JP 2001015406A JP 2002213467 A JP2002213467 A JP 2002213467A
- Authority
- JP
- Japan
- Prior art keywords
- seal lip
- peripheral surface
- rolling bearing
- cylindrical portion
- race
- 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.)
- Pending
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
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
-
- 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
- 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
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明に係る転がり軸受用
密封装置は、例えば自動車用車輪の支持装置、或は各種
産業機械装置等の回転支持部に組み込む転がり軸受の密
封装置の改良に関する。特に本発明の転がり軸受用密封
装置は、転がり軸受のトルク（回転抵抗）を増大する事
なく、シール性の向上を図るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for a rolling bearing, for example, to a sealing device for a rolling bearing to be incorporated into a support device for a vehicle wheel or a rotary support portion of various industrial machinery. In particular, the sealing device for a rolling bearing of the present invention aims at improving the sealing performance without increasing the torque (rotational resistance) of the rolling bearing.
【０００２】[0002]
【従来の技術】各種機械装置の回転支持部に、玉軸受、
ころ軸受、円すいころ軸受等の転がり軸受が組み込まれ
ている。この様な転がり軸受には密封装置を組み込ん
で、この転がり軸受の内部に封入したグリースが外部に
漏洩する事を防止したり、或は外部に存在する雨水、泥
水、塵等の各種異物が転がり軸受の内部に入り込む事を
防止している。図５は、この様な目的で転がり軸受の端
部開口に装着する密封装置の従来構造の１例を示してい
る。2. Description of the Related Art Ball bearings,
Rolling bearings such as roller bearings and tapered roller bearings are incorporated. A sealing device is incorporated in such a rolling bearing to prevent the grease sealed inside the rolling bearing from leaking to the outside, or that various foreign substances such as rainwater, muddy water, and dust existing outside roll. Prevents entry into the bearing. FIG. 5 shows an example of a conventional structure of a sealing device mounted on an end opening of a rolling bearing for such a purpose.
【０００３】この図５に示した従来構造の１例は、実開
平３−１２１２２４号公報に記載されたもので、芯金１
と、スリンガ２と、シール材３とから成る。このうちの
芯金１は、転がり軸受を構成する外輪４の端部内周面に
内嵌固定自在な外径側円筒部５と、この外径側円筒部５
の軸方向内端縁（転がり軸受の軸方向中央寄り端縁で、
図５の左端縁）から直径方向内方に折れ曲がった内側円
輪部６を備えた、断面Ｌ字形で全体を円環状としてい
る。又、上記スリンガ２は、上記転がり軸受を構成する
内輪７の端部外周面に外嵌固定自在な内径側円筒部８
と、この内径側円筒部８の軸方向外端縁（転がり軸受の
軸方向開口寄り端縁で、図５の右端縁）から直径方向外
方に折れ曲がった外側円輪部９とを備えた、断面Ｌ字形
で全体を円環状としている。又、上記シール材３は、ゴ
ムの如きエラストマー等の弾性材により造られて、外
側、中間、内側の３本のシールリップ１０〜１２を備
え、上記芯金１にその基端部を結合固定している。そし
て、最も外側に位置する外側シールリップ１０の先端縁
を上記スリンガ２を構成する外側円輪部９の内側面に摺
接させ、残り２本のシールリップである中間シールリッ
プ１１及び内側シールリップ１２の先端縁を、上記スリ
ンガ２を構成する内径側円筒部８の外周面に摺接させて
いる。One example of the conventional structure shown in FIG. 5 is described in Japanese Utility Model Laid-Open Publication No. 3-121224.
, A slinger 2 and a sealing material 3. The core metal 1 includes an outer diameter side cylindrical portion 5 which can be fitted and fixed on an inner peripheral surface of an end portion of an outer ring 4 constituting a rolling bearing, and an outer diameter side cylindrical portion 5.
The axial inner edge of the bearing (the edge near the axial center of the rolling bearing,
An inner ring portion 6 that is bent inward in the diametric direction from the left edge (the left edge in FIG. 5) has an L-shaped cross section and is entirely annular. Further, the slinger 2 has an inner cylindrical portion 8 which can be externally fitted and fixed to an outer peripheral surface of an end portion of an inner ring 7 constituting the rolling bearing.
And an outer annular portion 9 bent radially outward from an axially outer edge of the inner diameter side cylindrical portion 8 (an edge near the axial opening of the rolling bearing and a right edge in FIG. 5). The whole has an annular shape with an L-shaped cross section. The seal member 3 is made of an elastic material such as an elastomer such as rubber, and has three seal lips 10 to 12 on the outside, the middle, and the inside. are doing. The leading edge of the outermost outer seal lip 10 is slidably contacted with the inner side surface of the outer annular portion 9 constituting the slinger 2, and the remaining two seal lips, the intermediate seal lip 11 and the inner seal lip The leading edge of the slider 12 is in sliding contact with the outer peripheral surface of the inner cylindrical portion 8 constituting the slinger 2.
【０００４】この様な従来の密封装置は、シール材３に
設けた各シールリップ１０〜１２の先端縁とスリンガ２
とを摺接させる事により、転がり軸受の端部開口を塞
ぐ。そして、この転がり軸受の内部に封入したグリース
が外部に漏洩する事を防止すると共に、外部に存在する
雨水、泥水、塵等の各種異物が転がり軸受の内部に入り
込む事を防止する。[0004] Such a conventional sealing device includes a tip of each of the sealing lips 10 to 12 provided on the sealing material 3 and a slinger 2.
By sliding contact with each other, the end opening of the rolling bearing is closed. The grease sealed inside the rolling bearing is prevented from leaking to the outside, and various foreign substances such as rainwater, muddy water, and dust existing outside are prevented from entering the inside of the rolling bearing.
【０００５】[0005]
【発明が解決しようとする課題】上述の様な従来の密封
装置の場合には、転がり軸受の運転速度が急上昇する様
な、厳しい使用条件の下では、シール材３に設けた各シ
ールリップ１０〜１２の先端縁とスリンガ２を構成する
外側円輪部９の内側面及び内径側円筒部８の外周面との
摺接部のシール性を、十分に確保できない可能性があ
る。即ち、上記各シールリップ１０〜１２の先端縁は、
上記シール材３を構成する弾性材の弾力に基づき、上記
スリンガ２の内側面及び外周面に押し付けられている。
通常の使用状態の下では、上記各シールリップ１０〜１
２の先端縁と上記内側面及び外周面との密着力（当接
圧）を十分に確保できるが、例えば運転速度が急上昇す
る様な、或は高速で長時間運転する様な使用状態の下で
は、上記密着力が低下して、シール性、特に耐水性が悪
化する可能性がある。この様なシール性の低下は、外部
に存在する雨水、泥水等の異物が転がり軸受の内部に侵
入する原因となる為、好ましくない。In the case of the conventional sealing device as described above, each sealing lip 10 provided on the sealing material 3 under severe use conditions such as an abrupt increase in the operating speed of the rolling bearing. There is a possibility that the sealing performance of the sliding contact portion between the leading edge of the inner ring 12 and the inner surface of the outer annular portion 9 and the outer peripheral surface of the inner cylindrical portion 8 constituting the slinger 2 may not be sufficiently secured. That is, the leading edge of each of the seal lips 10 to 12 is
The slinger 2 is pressed against the inner surface and the outer surface of the slinger 2 based on the elasticity of the elastic material constituting the seal member 3.
Under normal use conditions, each of the above seal lips 10-1
The contact force (contact pressure) between the front end edge of the second and the inner and outer peripheral surfaces can be sufficiently ensured. However, for example, under operating conditions such as a sudden increase in operating speed or high-speed operation for a long time. In such a case, there is a possibility that the above-mentioned adhesive strength is reduced and the sealing property, particularly the water resistance is deteriorated. Such a decrease in sealing performance is not preferable because foreign matters such as rainwater and muddy water existing outside enter the inside of the rolling bearing.
【０００６】この様な侵入を防止すべく、上記各シール
リップ１０〜１２の先端縁を上記内側面及び外周面に押
し付ける力を大きくし、厳しい使用条件の下でもシール
性を確保できる様にする事が考えられる。ところが、こ
の様に各シールリップ１０〜１２の先端縁を上記各面に
押し付ける力を大きくすると、これら各シールリップ１
０〜１２の先端縁と上記内側面及び外周面との摺接部に
働く摩擦力が大きくなり、転がり軸受を回転させる為に
要するトルクが大きくなる為、好ましくない。本発明
は、この様な事情に鑑みて、転がり軸受のトルク（回転
抵抗）を増大する事なく、厳しい使用条件の下でもシー
ル性を確保できる転がり軸受用密封装置を実現すべく発
明したものである。In order to prevent such intrusion, the force for pressing the leading edge of each of the seal lips 10 to 12 against the inner and outer peripheral surfaces is increased so that the sealing performance can be ensured even under severe use conditions. Things are possible. However, when the force for pressing the leading edge of each of the seal lips 10 to 12 against the above-described surfaces is increased, the respective seal lip 1
It is not preferable because the frictional force acting on the sliding portions between the leading edges 0 to 12 and the inner and outer peripheral surfaces increases, and the torque required to rotate the rolling bearing increases. In view of such circumstances, the present invention has been devised in order to realize a sealing device for a rolling bearing which can ensure sealing performance even under severe use conditions without increasing the torque (rotational resistance) of the rolling bearing. is there.
【０００７】[0007]
【課題を解決するための手段】本発明の転がり軸受用密
封装置は、外輪の内周面に設けた外輪軌道と内輪の外周
面に設けた内輪軌道との間に複数個の転動体を設けて上
記外輪と内輪との相対回転を自在とした転がり軸受に組
み込み、上記外輪の端部内周面と上記内輪の端部外周面
との間を塞ぐものである。The sealing device for a rolling bearing according to the present invention comprises a plurality of rolling elements provided between an outer raceway provided on an inner peripheral surface of an outer race and an inner raceway provided on an outer peripheral surface of an inner race. The outer ring and the inner ring are incorporated in a rolling bearing that allows relative rotation between the outer ring and the inner ring, thereby closing the gap between the inner peripheral surface at the end of the outer ring and the outer peripheral surface at the end of the inner ring.
【０００８】この様な本発明の転がり軸受用密封装置
は、前述の図５に示した従来構造と同様に、芯金と、ス
リンガと、シール材とから成る。このうちの芯金は、上
記外輪の端部内周面に内嵌固定自在な外径側円筒部及び
この外径側円筒部の軸方向内端縁から直径方向内方に折
れ曲がった内側円輪部を備え、全体を円環状としてい
る。又、上記スリンガは、上記内輪の端部外周面に外嵌
固定自在な内径側円筒部及びこの内径側円筒部の軸方向
外端縁から直径方向外方に折れ曲がった外側円輪部を備
え、全体を円環状としている。又、上記シール材は、弾
性材により造られて少なくとも１本のシールリップを有
し、上記芯金にその基端部を結合固定している。そし
て、上記シールリップの先端縁を、上記スリンガを構成
する外側円輪部の内側面と内径側円筒部の外周面とのう
ちの少なくとも何れかに摺接させている。Such a sealing device for a rolling bearing according to the present invention comprises a metal core, a slinger, and a sealing material, similarly to the conventional structure shown in FIG. Of these, the core metal is an outer cylindrical portion that can be fitted and fixed on the inner peripheral surface at the end of the outer ring, and an inner circular portion that is bent radially inward from the axial inner edge of the outer cylindrical portion. And the whole is annular. The slinger further includes an inner cylindrical portion that can be externally fitted and fixed to an outer peripheral surface of an end portion of the inner ring, and an outer circular portion that is bent radially outward from an axial outer end edge of the inner cylindrical portion, The whole is annular. The sealing material is made of an elastic material and has at least one sealing lip, and a base end of the sealing lip is fixedly connected to the cored bar. Then, the leading edge of the seal lip is slidably contacted with at least one of the inner surface of the outer ring portion and the outer peripheral surface of the inner cylindrical portion constituting the slinger.
【０００９】特に、本発明の転がり軸受用密封装置に於
いては、上記シールリップの先端部乃至先端寄り部分
に、このシールリップの先端縁が摺接する上記外側円輪
部の内側面若しくは内径側円筒部の外周面に近接対向す
る補助シールリップを設けている。そして、この補助シ
ールリップの先端縁とこの先端縁が近接対向する内側面
若しくは外周面との間にラビリンスシールを設けてい
る。In particular, in the sealing device for a rolling bearing of the present invention, the inner or inner diameter side of the outer ring portion in which the distal end edge of the seal lip is in sliding contact with the distal end portion of the seal lip. An auxiliary seal lip is provided on the outer peripheral surface of the cylindrical portion so as to be closely opposed to the cylindrical portion. A labyrinth seal is provided between the leading edge of the auxiliary seal lip and the inner or outer peripheral surface where the leading edge is close to and facing.
【００１０】[0010]
【作用】上述の様に構成する本発明の転がり軸受用密封
装置の場合には、転がり軸受のトルクを増大する事な
く、厳しい使用条件の下でもシール性を確保できる。即
ち、シールリップの先端部乃至先端寄り部分に設けた補
助シールリップと、スリンガを構成する外側円輪部の内
側面若しくは内径側円筒部の外周面との間にラビリンス
シールを設けている為、シールリップの先端縁と上記側
面若しくは外周面との密着力が低下しても、上記ラビリ
ンスシールによりシール性を確保できる。しかも、上記
補助シールリップを上記側面若しくは外周面に摺接させ
ず、この側面若しくは外周面に近接対向させる為、この
補助シールリップを設ける事により、転がり軸受の回転
抵抗が増大する事もない。The sealing device for a rolling bearing according to the present invention constructed as described above can ensure the sealing performance even under severe use conditions without increasing the torque of the rolling bearing. That is, since the labyrinth seal is provided between the auxiliary seal lip provided at the distal end portion or the portion near the distal end of the seal lip, and the inner surface of the outer circular portion or the outer peripheral surface of the inner cylindrical portion constituting the slinger, Even if the adhesive force between the tip edge of the seal lip and the side surface or the outer peripheral surface is reduced, the labyrinth seal can ensure the sealing performance. In addition, since the auxiliary seal lip is not brought into sliding contact with the side surface or the outer peripheral surface but is closely opposed to the side surface or the outer peripheral surface, the provision of the auxiliary seal lip does not increase the rotational resistance of the rolling bearing.
【００１１】[0011]
【発明の実施の形態】図１〜２は、本発明の実施の形態
の第１例を示している。本例の密封装置１３は、芯金１
と、スリンガ２と、シール材３ａとから成る。このうち
の芯金１は、低炭素鋼板或はステンレス鋼板等の金属板
にプレス加工等の打ち抜き加工並びに塑性加工を施す事
により、一体成形している。この様な芯金１は、例えば
図２に示す様に、転がり軸受である複列アンギュラ玉軸
受１４の外輪１５の端部内周面に内嵌固定自在な外径側
円筒部５と、この外径側円筒部５の軸方向内端縁（組み
付け状態で上記玉軸受１４の中央寄りとなる端縁で、図
１の左端縁）から直径方向内方に折れ曲がった内側円輪
部６とを備えた、断面略Ｌ字形で全体を円環状としてい
る。1 and 2 show a first embodiment of the present invention. The sealing device 13 of the present embodiment includes the core 1
, A slinger 2 and a sealing material 3a. The core metal 1 is integrally formed by subjecting a metal plate such as a low carbon steel plate or a stainless steel plate to a punching process such as a press process and a plastic process. As shown in FIG. 2, for example, such a cored bar 1 has an outer diameter side cylindrical portion 5 which can be fitted and fixed on an inner peripheral surface of an end portion of an outer ring 15 of a double row angular contact ball bearing 14 which is a rolling bearing. An inner annular portion 6 bent radially inward from an axial inner edge of the radial cylindrical portion 5 (an edge near the center of the ball bearing 14 in an assembled state and a left edge in FIG. 1). In addition, the whole has an annular shape with a substantially L-shaped cross section.
【００１２】又、上記スリンガ２は、亜鉛メッキ鋼板、
ステンレス鋼板等、優れた耐食性を有する金属板に、や
はりプレス加工等の打ち抜き加工並びに塑性加工を施す
事により一体成形している。この様なスリンガ２は、上
記複列アンギュラ玉軸受１４を構成する内輪１６の外端
部（組み付け状態で上記玉軸受１４の幅方向端部となる
部分）外周面に外嵌固定自在な内径側円筒部８と、この
内径側円筒部８の軸方向外端縁（図１の右端縁）から直
径方向外方に折れ曲がった外側円輪部９とを備えた、断
面Ｌ字形で全体を円環状としている。The slinger 2 is made of a galvanized steel sheet,
A metal plate having excellent corrosion resistance, such as a stainless steel plate, is also integrally formed by punching and plastic working such as press working. Such a slinger 2 is provided on the inner side of the inner ring 16 which forms the double row angular contact ball bearing 14 and which can be externally fitted and fixed to the outer peripheral surface of the inner ring 16 (a portion which becomes the width direction end of the ball bearing 14 in an assembled state). A cylindrical portion 8 and an outer annular portion 9 bent radially outward from an axially outer edge (the right edge in FIG. 1) of the inner diameter side cylindrical portion 8, having an L-shaped cross section as a whole. And
【００１３】又、上記シール材３ａは、ゴムの如きエラ
ストマー等の弾性材により造られて、外側、中間、内側
の３本のシールリップ１０ａ、１１、１２を備え、上記
芯金１にその基端部を、焼き付け、接着等により結合固
定している。そして、最も外側に位置する外側シールリ
ップ１０ａの先端縁を上記スリンガ２を構成する外側円
輪部９の内側面に全周に亙って摺接させ、残り２本のシ
ールリップである中間シールリップ１１及び内側シール
リップ１２の先端縁を、上記スリンガ２を構成する内径
側円筒部８の外周面に全周に亙って摺接させている。
又、本例の場合、上記シール材３ａの基端部により、上
記芯金１を構成する外径側円筒部５の内周面を覆ってい
る。The seal member 3a is made of an elastic material such as an elastomer such as rubber, and has three seal lips 10a, 11, and 12 on the outside, the middle, and the inside. The ends are connected and fixed by baking, bonding or the like. Then, the leading edge of the outermost outer seal lip 10a is brought into sliding contact with the inner surface of the outer annular portion 9 constituting the slinger 2 over the entire circumference, and the remaining two seal lips, the intermediate seal lip, are provided. The leading edges of the lip 11 and the inner seal lip 12 are slid over the entire outer peripheral surface of the inner cylindrical portion 8 constituting the slinger 2.
Further, in the case of the present example, the inner peripheral surface of the outer diameter side cylindrical portion 5 constituting the cored bar 1 is covered by the base end of the sealing material 3a.
【００１４】特に、本例の転がり軸受用密封装置に於い
ては、上記各シールリップ１０ａ、１１、１２のうちの
外側シールリップ１０ａの先端部乃至先端寄り部分に補
助シールリップ２０を設け、この補助シールリップ２０
の先端縁を、上記外側円輪部９の内側面に近接対向させ
ている。そして、この補助シールリップ２０の先端縁と
上記外側円輪部９の内側面とにより、ラビリンスシール
を構成している。この為に、本例の場合は、上記外側シ
ールリップ１０ａの先端縁が上記外側円輪部９の内側面
に摺接した状態（この外側シールリップ１０ａが弾性変
形した状態）で、上記補助シールリップ２０の先端縁と
上記内側面との隙間が、この補助シールリップ２０の外
側面と上記外側円輪部９との間の空間の軸方向寸法より
も小さくなる様に、各部の寸法、形状等を規制してい
る。具体的には、上記シール材３ａを構成する弾性材の
弾力、上記外側シールリップ１０ａ及び補助シールリッ
プ２０の寸法、形状、並びに、この外側シールリップ１
０ａの先端縁と上記外側円輪部９の内側面との締め代等
を規制している。In particular, in the sealing device for a rolling bearing of the present embodiment, an auxiliary seal lip 20 is provided at a tip portion or a portion near the tip of the outer seal lip 10a among the seal lips 10a, 11, and 12. Auxiliary seal lip 20
Is made to closely approach the inner side surface of the outer ring portion 9. A labyrinth seal is constituted by the tip end edge of the auxiliary seal lip 20 and the inner side surface of the outer circular ring portion 9. For this reason, in the case of the present example, the auxiliary sealing is carried out in a state where the tip edge of the outer seal lip 10a is in sliding contact with the inner side surface of the outer annular portion 9 (in a state where the outer seal lip 10a is elastically deformed). The size and shape of each part such that the gap between the leading edge of the lip 20 and the inner surface is smaller than the axial dimension of the space between the outer surface of the auxiliary seal lip 20 and the outer ring 9. Etc. are regulated. Specifically, the elasticity of the elastic material constituting the sealing material 3a, the size and shape of the outer seal lip 10a and the auxiliary seal lip 20, and the outer seal lip 1
The interference between the leading edge of Oa and the inner surface of the outer ring 9 is restricted.
【００１５】この様な本例の密封装置１３は、例えば図
２に示す様に、転がり軸受である複列アンギュラ玉軸受
１４を構成する外輪１５の両端部内周面と１対の内輪１
６、１６の端部外周面との間に組み込む。そして、上記
シール材３ａに設けた各シールリップ１０ａ、１１、１
２の先端縁とスリンガ２とを摺接させると共に、上記補
助シールリップ２０を上記外側円輪部９の内側面に近接
対向させる事により、上記複列アンギュラ玉軸受１４の
両端開口を塞ぐ。この状態で、この複列アンギュラ玉軸
受１４の内部に封入したグリースが外部に漏洩する事を
防止すると共に、外部に存在する雨水、泥水、塵等の各
種異物が上記内部に入り込む事を防止する。尚、この複
列アンギュラ玉軸受１４は、上記外輪１５の内周面に設
けた複列の外輪軌道１７、１７と上記各内輪１６、１６
の外周面に設けた内輪軌道１８、１８との間に複数個ず
つ転動自在に転動体（玉）１９、１９を設けて、上記外
輪１５と内輪１６、１６との相対回転を自在としてい
る。As shown in FIG. 2, for example, as shown in FIG. 2, the sealing device 13 of the present embodiment has a pair of inner rings 1 and inner circumferential surfaces at both ends of an outer ring 15 constituting a double row angular contact ball bearing 14 which is a rolling bearing.
Assembled between the end outer peripheral surfaces of 6 and 16. Then, each of the sealing lips 10a, 11, 1 and 1 provided on the sealing material 3a is provided.
2 and the slinger 2 is slidably contacted with each other, and the auxiliary seal lip 20 is brought into close proximity to the inner side surface of the outer circular ring portion 9, thereby closing the openings at both ends of the double-row angular ball bearing 14. In this state, the grease sealed inside the double row angular contact ball bearing 14 is prevented from leaking to the outside, and various foreign substances such as rainwater, muddy water, and dust existing outside are prevented from entering the inside. . The double-row angular contact ball bearing 14 includes a double-row outer raceway 17, 17 provided on the inner peripheral surface of the outer race 15 and the inner races 16, 16.
A plurality of rolling elements (balls) 19, 19 are provided so as to freely roll between the inner raceways 18, 18 provided on the outer peripheral surface of the outer race 15 so that the outer race 15 and the inner races 16, 16 can rotate relative to each other. .
【００１６】上述の様に構成する本発明の転がり軸受用
密封装置１３の場合には、複列アンギュラ玉軸受１４の
トルクを増大する事なく、シール性を確保できる。即
ち、上記外側シールリップ１０ａの先端部乃至先端寄り
部分に設けた上記補助シールリップ２０の先端縁と、上
記スリンガ２を構成する外側円輪部９の内側面とにより
ラビリンスシールを構成している為、上記外側シールリ
ップ１０ａの先端縁と上記外側円輪部９の内側面との密
着力が低下しても、上記ラビリンスシールにより十分な
シール性を確保できる。しかも、上記補助シールリップ
２０の先端縁を上記外側円輪部９の内側面に摺接させ
ず、この内側面に近接対向させている為、この補助シー
ルリップ２０を設ける事により、上記複列アンギュラ玉
軸受１４の回転抵抗が増大する事もない。In the case of the rolling bearing sealing device 13 of the present invention configured as described above, the sealing performance can be ensured without increasing the torque of the double row angular contact ball bearing 14. That is, a labyrinth seal is constituted by the distal end edge of the auxiliary seal lip 20 provided at the distal end portion or a portion near the distal end of the outer seal lip 10a and the inner side surface of the outer annular portion 9 constituting the slinger 2. Therefore, even if the adhesive force between the leading edge of the outer seal lip 10a and the inner surface of the outer annular portion 9 is reduced, the labyrinth seal can ensure sufficient sealing performance. Further, since the leading edge of the auxiliary seal lip 20 is not in sliding contact with the inner surface of the outer circular ring portion 9 but is closely opposed to the inner surface, the provision of the auxiliary seal lip 20 enables the double row The rotational resistance of the angular contact ball bearing 14 does not increase.
【００１７】尚、本例の場合は、密封装置を組み込む転
がり軸受が複列アンギュラ玉軸受１４である場合を示し
たが、単列の玉軸受、或は、転動体１９、１９として円
筒ころや円すいころを使用する、円筒ころ軸受や円すい
ころ軸受であっても良い。又、本例の場合、外側シール
リップ１０ａにのみ補助シールリップ２０を設けたが、
必要に応じて、中間、内側シールリップ１１、１２に補
助シールリップを設けても良い。中間、内側シールリッ
プ１１、１２に補助シールリップを設けた場合には、こ
の補助シールリップの先端縁を、スリンガ２の内径側円
筒部８の外周面に近接対向させる。In this embodiment, the case where the rolling bearing incorporating the sealing device is a double-row angular contact ball bearing 14 is shown. However, a single-row ball bearing, or a cylindrical roller or a rolling element 19, 19 is used. A cylindrical roller bearing or a tapered roller bearing using a tapered roller may be used. In the case of this example, the auxiliary seal lip 20 is provided only on the outer seal lip 10a,
If necessary, auxiliary seal lips may be provided on the intermediate and inner seal lips 11, 12. When the auxiliary seal lip is provided on the middle and inner seal lips 11, 12, the leading edge of the auxiliary seal lip is brought close to the outer peripheral surface of the inner cylindrical portion 8 of the slinger 2.
【００１８】次に、図３は、本発明の実施の形態の第２
例を示している。本例の場合には、外側シールリップ１
０ａの先端部乃至先端寄り部分に設けた補助シールリッ
プ２０ａの先端部外側面に、スリンガ２を構成する外側
円輪部９の内側面に向けて突出する突条２１を、全周に
亙って形成している。即ち、上記外側シールリップ１０
ａの先端縁が上記外側円輪部９の内側面に摺接した状態
で、この外側円輪部９の内側面と上記突条２１の頂部と
の隙間を、上記補助シールリップ２０ａの外側面とこの
外側円輪部９の内側面との間の空間の軸方向寸法よりも
小さくし、上記補助シールリップ２０ａの先端縁と外側
円輪部９の内側面とによりラビリンスシールを構成して
いる。尚、本例の場合、上記突条２１の頂部が、上記補
助シールリップ２０ａの先端縁に相当する。その他の構
成及び作用に就いては、上述した第１例の場合と同様で
ある為、同等部分に関する図示及び説明は省略する。FIG. 3 shows a second embodiment of the present invention.
An example is shown. In the case of this example, the outer seal lip 1
On the outer surface of the distal end portion of the auxiliary seal lip 20a provided at the distal end portion or near the distal end portion of the outer ring portion 9a, a ridge 21 projecting toward the inner side surface of the outer annular portion 9 constituting the slinger 2 is provided over the entire circumference. It is formed. That is, the outer seal lip 10
In the state where the leading edge of the outer ring 9 is in sliding contact with the inner surface of the outer ring 9, the gap between the inner surface of the outer ring 9 and the top of the ridge 21 is removed by the outer surface of the auxiliary seal lip 20 a. The space between the outer ring 9 and the inner surface of the outer ring 9 is smaller than the axial dimension, and a labyrinth seal is formed by the leading edge of the auxiliary seal lip 20a and the inner surface of the outer ring 9. . In the case of this example, the top of the ridge 21 corresponds to the leading edge of the auxiliary seal lip 20a. Other configurations and operations are the same as those of the above-described first example, and illustration and description of the equivalent parts are omitted.
【００１９】次に、図４は、本発明の実施の形態の第３
例を示している。本例の場合には、外側シールリップ１
０ａの先端部乃至先端寄り部分に設けた補助シールリッ
プ２０ｂの先端部外側面並びに中間部外側面に、スリン
ガ２を構成する外側円輪部９の内側面に向けて突出した
突条２１、２１を、全周に亙ってそれぞれ形成してい
る。即ち、上記外側シールリップ１０ａの先端縁が上記
外側円輪部９の内側面に摺接した状態で、この外側円輪
部９の内側面と上記各突条２１、２１の頂部との隙間
を、この外側円輪部９の内側面と上記補助シールリップ
２０ｂの外側面との間の空間の軸方向寸法よりも小さく
し、上記補助シールリップ２０ｂと外側円輪部９の内側
面とによりラビリンスシールを構成している。本例の場
合には、上記各突条２１、２１の頂部が、上記補助シー
ルリップ２０ｂの先端縁に相当する。その他の構成及び
作用に就いては、前述した第１例の場合と同様である
為、同等部分に関する図示及び説明は省略する。FIG. 4 shows a third embodiment of the present invention.
An example is shown. In the case of this example, the outer seal lip 1
Projections 21, 21 protruding toward the inner surface of the outer annular portion 9 constituting the slinger 2 are formed on the outer surface of the distal end portion and the outer surface of the intermediate portion of the auxiliary seal lip 20 b provided at the distal end portion or near the distal end portion of the outer ring portion 9. Are formed over the entire circumference. That is, in a state in which the tip edge of the outer seal lip 10a is in sliding contact with the inner surface of the outer ring portion 9, the gap between the inner surface of the outer ring portion 9 and the top of each of the ridges 21 is formed. The space between the inner surface of the outer annular portion 9 and the outer surface of the auxiliary seal lip 20b is made smaller than the axial dimension, and the labyrinth is formed by the auxiliary seal lip 20b and the inner surface of the outer annular portion 9. Constitutes a seal. In the case of this example, the tops of the ridges 21 and 21 correspond to the leading edge of the auxiliary seal lip 20b. Other configurations and operations are the same as those of the above-described first example, and illustration and description of the equivalent parts are omitted.
【００２０】[0020]
【発明の効果】本発明は、以上に述べた通り構成され作
用するので、転がり軸受の回転抵抗を増大する事なく、
厳しい使用条件の下でもシール性を確保できる転がり軸
受用密封装置を実現できる。Since the present invention is constructed and operates as described above, without increasing the rolling resistance of the rolling bearing,
It is possible to realize a sealing device for a rolling bearing that can ensure sealing performance even under severe use conditions.
【図１】本発明の実施の形態の第１例を示す部分断面
図。FIG. 1 is a partial cross-sectional view showing a first example of an embodiment of the present invention.
【図２】図１の密封装置を組み込んだ転がり軸受の半部
断面図。FIG. 2 is a half sectional view of a rolling bearing incorporating the sealing device of FIG. 1;
【図３】本発明の実施の形態の第２例を示す、図１のＡ
部に相当する図。FIG. 3A shows a second example of the embodiment of the present invention,
FIG.
【図４】同第３例を示す、図３と同様の図。FIG. 4 is a view similar to FIG. 3, showing the third example.
【図５】従来構造の１例を示す部分断面図。FIG. 5 is a partial cross-sectional view showing one example of a conventional structure.
１ 芯金 ２ スリンガ ３、３ａ シール材 ４ 外輪 ５ 外径側円筒部 ６ 内側円輪部 ７ 内輪 ８ 内径側円筒部 ９ 外側円輪部 １０、１０ａ 外側シールリップ １１ 中間シールリップ １２ 内側シールリップ １３ 密封装置 １４ 複列アンギュラ玉軸受 １５ 外輪 １６ 内輪 １７ 外輪軌道 １８ 内輪軌道 １９ 転動体 ２０、２０ａ、２０ｂ 補助シールリップ ２１ 突条 DESCRIPTION OF SYMBOLS 1 Core metal 2 Slinger 3, 3a Seal material 4 Outer ring 5 Outer diameter side cylindrical part 6 Inner ring part 7 Inner ring 8 Inner diameter side cylindrical part 9 Outer ring part 10, 10a Outer seal lip 11 Intermediate seal lip 12 Inner seal lip 13 Sealing device 14 Double row angular contact ball bearing 15 Outer ring 16 Inner ring 17 Outer ring raceway 18 Inner ring raceway 19 Rolling element 20, 20a, 20b Auxiliary seal lip 21 Ridge
Claims (1)
外周面に設けた内輪軌道との間に複数個の転動体を設け
て上記外輪と内輪との相対回転を自在とした転がり軸受
に組み込み、上記外輪の端部内周面と上記内輪の端部外
周面との間を塞ぐ為、上記外輪の端部内周面に内嵌固定
自在な外径側円筒部及びこの外径側円筒部の軸方向内端
縁から直径方向内方に折れ曲がった内側円輪部を備えた
円環状の芯金と、上記内輪の端部外周面に外嵌固定自在
な内径側円筒部及びこの内径側円筒部の軸方向外端縁か
ら直径方向外方に折れ曲がった外側円輪部を備えた円環
状のスリンガと、弾性材により造られて少なくとも１本
のシールリップを有し、上記芯金にその基端部を結合固
定したシール材とから成り、上記シールリップの先端縁
を上記スリンガを構成する外側円輪部の内側面と内径側
円筒部の外周面とのうちの少なくとも何れかに摺接させ
た転がり軸受用密封装置に於いて、上記シールリップの
先端部乃至先端寄り部分に、このシールリップの先端縁
が摺接する上記外側円輪部の内側面若しくは内径側円筒
部の外周面に近接対向する補助シールリップを設け、こ
の補助シールリップの先端縁とこの先端縁が近接対向す
る内側面若しくは外周面との間にラビリンスシールを設
けた事を特徴とする転がり軸受用密封装置。A plurality of rolling elements are provided between an outer raceway provided on an inner peripheral surface of an outer race and an inner raceway provided on an outer peripheral surface of an inner race to enable relative rotation between the outer race and the inner race. In order to close the gap between the inner peripheral surface at the end of the outer race and the outer peripheral surface at the end of the inner race, the outer cylindrical portion and the outer cylindrical portion which can be fitted and fixed to the inner peripheral surface at the end of the outer race. An annular core having an inner annular portion bent radially inward from the axial inner end of the portion, an inner cylindrical portion which can be externally fixed to the outer peripheral surface of the end of the inner ring, and an inner cylindrical portion An annular slinger having an outer ring portion bent outward in the diameter direction from an axial outer end edge of the cylindrical portion, and at least one seal lip made of an elastic material. A sealing material having a base end connected and fixed thereto, and a leading edge of the sealing lip is formed with the slinger. In the sealing device for a rolling bearing, which is slidably contacted with at least one of the inner surface of the outer annular portion and the outer peripheral surface of the inner cylindrical portion, the tip portion or the tip portion of the seal lip is An auxiliary seal lip is provided to oppose the inner surface of the outer ring portion or the outer peripheral surface of the inner cylindrical portion on which the distal end edge of the seal lip slides, and the distal end edge of the auxiliary seal lip and the distal end edge are closely opposed. A sealing device for a rolling bearing, wherein a labyrinth seal is provided between an inner surface and an outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001015406A JP2002213467A (en) | 2001-01-24 | 2001-01-24 | Sealing device for rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001015406A JP2002213467A (en) | 2001-01-24 | 2001-01-24 | Sealing device for rolling bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002213467A true JP2002213467A (en) | 2002-07-31 |
Family
ID=18881963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001015406A Pending JP2002213467A (en) | 2001-01-24 | 2001-01-24 | Sealing device for rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002213467A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090226124A1 (en) * | 2008-02-25 | 2009-09-10 | Jtekt Corporation | Sealing device for bearing |
-
2001
- 2001-01-24 JP JP2001015406A patent/JP2002213467A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090226124A1 (en) * | 2008-02-25 | 2009-09-10 | Jtekt Corporation | Sealing device for bearing |
| US8308370B2 (en) * | 2008-02-25 | 2012-11-13 | Jtekt Corporation | Sealing device for bearing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5836584B2 (en) | Wheel bearing device | |
| WO2017038890A1 (en) | Bearing device for vehicle wheel | |
| JP6717524B2 (en) | Wheel bearing device | |
| JPH10252762A (en) | Sealing device for rolling bearing | |
| JP5964120B2 (en) | Wheel bearing sealing device | |
| EP2693068A1 (en) | Bearing device for wheel | |
| JP2007177814A (en) | Sealing device and rolling bearing device using it | |
| JP4297658B2 (en) | Wheel bearing device | |
| JP2010185465A (en) | Roller bearing unit with combination seal ring | |
| JP4466112B2 (en) | Rolling bearing unit for wheel support | |
| WO2014054616A1 (en) | Sealed roller bearing | |
| WO2019054473A1 (en) | Sealing member, and wheel bearing device comprising same | |
| JP2016084911A (en) | Bearing device for wheel | |
| JP2014126106A (en) | Rolling bearing unit for supporting wheel | |
| JP2008133908A (en) | Wheel supporting rolling bearing unit with seal ring | |
| WO2018174264A1 (en) | Bearing device for wheel | |
| JP2004169761A (en) | Double row tapered rolling bearing with combined seal ring | |
| JP2017053368A (en) | Bearing device for wheel | |
| JP4719977B2 (en) | Sealing device for rolling bearing, its conveying method and assembling method | |
| JP2015200393A (en) | Rolling bearing with seal ring | |
| JP2020106081A (en) | Hub unit bearing | |
| JP2018054024A (en) | Roller bearing with seal for pulley unit | |
| JP2020020351A (en) | Wheel support rolling bearing unit | |
| JP7495277B2 (en) | Wheel support rolling bearing unit | |
| JP2015227673A (en) | Bearing device for wheel |