JP2000257641A - Seal device for rolling bearing - Google Patents
Seal device for rolling bearingInfo
- Publication number
- JP2000257641A JP2000257641A JP11063624A JP6362499A JP2000257641A JP 2000257641 A JP2000257641 A JP 2000257641A JP 11063624 A JP11063624 A JP 11063624A JP 6362499 A JP6362499 A JP 6362499A JP 2000257641 A JP2000257641 A JP 2000257641A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- retaining ring
- rolling bearing
- seal member
- sealing device
- 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
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
- F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- 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
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
-
- 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
- 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)
- Sealing Of Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は転がり軸受用の密封
装置に関し、特に、比較的大径で薄肉の転がり軸受に用
いるのに適した密封装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for a rolling bearing, and more particularly to a sealing device suitable for use in a relatively large-diameter and thin-walled rolling bearing.
【０００２】[0002]
【従来の技術】転がり軸受の外輪と内輪との間の環状空
間をその軸方向端部において封止する密封装置は、一般
に、一方の軌道輪、例えば外輪に形成された周溝に装着
され、他方の軌道輪、つまり内輪に対して接触もしくは
近接することによって上記の環状空間を封止するが、密
封性は、当然のことながら他方の軌道輪に対して接触す
るタイプの方が優れている。2. Description of the Related Art A sealing device for sealing an annular space between an outer ring and an inner ring of a rolling bearing at an axial end thereof is generally mounted in a circumferential groove formed in one of the races, for example, an outer ring. The above-mentioned annular space is sealed by contacting or approaching the other bearing ring, that is, the inner ring, but the sealing performance is, of course, better for the type that contacts the other bearing ring. .
【０００３】ところで、比較的大径で薄肉の転がり軸
受、特に、図５に示すように、その外輪外径寸法Ｄと、
軸受の径方向への肉厚Ｔとの比比Ｄ／Ｔが８以上の薄肉
の転がり軸受においては、熱処理時に変形しやすいた
め、密封装置を装着するための周溝の精度も低下して確
実な装着が困難となってしまうことから、このような薄
肉タイプの転がり軸受においては、従来、密封装置の装
着部位に周溝に代えて段部を形成し、その段部の垂直の
壁面に密封装置をねじ止めやかしめ等の手段によって固
着する方法などが採用されていた。By the way, a relatively large-diameter, thin-walled rolling bearing, in particular, as shown in FIG.
A thin rolling bearing having a ratio D / T of 8 or more to the radial thickness T of the bearing is easily deformed at the time of heat treatment. Since mounting becomes difficult, in such a thin type rolling bearing, conventionally, a step portion is formed instead of a circumferential groove in a mounting portion of a sealing device, and a sealing device is formed on a vertical wall surface of the step portion. Has been adopted, for example, by a method such as screwing or caulking.
【０００４】以上のような薄肉の転がり軸受用で、か
つ、接触タイプの密封装置において、ねじ止めやかしめ
等の手段を用いることなく容易に外輪に対して装着可能
な密封装置として、本発明者らは、既に図６に要部断面
図を示す構造のものを提案している（特開平７−２７９
９７９号）。この密封装置においては、外輪８１の端面
近傍の内周面に形成された周溝８１１内に、軸方向内側
から、リング状の金属板からなる内側止め輪８６１、合
成樹脂もしくはゴムからなるリング状のシール部材８６
２、リング状の金属板からなる外側止め輪８６３を嵌め
込んで装着し、シール部材８６２の内周のシールリップ
８６２ａを内輪８２の端面近傍に設けられて端面側に小
径となる斜面８２１に当接させる構造を採る。また、外
側止め輪８６３には、図７にその部分正面図を示すよう
に、外周に複数個の切欠き部８６３ａを等分に配置する
ことによって径方向への撓みを許容させるようにしてい
る。[0004] In the contact-type sealing device for a thin rolling bearing as described above, the present inventor has proposed a sealing device which can be easily mounted on the outer ring without using means such as screwing or caulking. Have already proposed a structure shown in FIG.
No. 979). In this sealing device, an inner retaining ring 861 made of a ring-shaped metal plate and a ring-shaped ring made of synthetic resin or rubber are inserted into a circumferential groove 811 formed on the inner peripheral surface near the end face of the outer ring 81 from the inside in the axial direction. Seal member 86
2. An outer retaining ring 863 made of a ring-shaped metal plate is fitted and mounted, and a seal lip 862a on the inner periphery of the seal member 862 is provided near the end face of the inner ring 82 to contact the slope 821 having a small diameter on the end face side. Adopt a structure to contact. Further, as shown in a partial front view of FIG. 7, the outer retaining ring 863 is provided with a plurality of notches 863a on an outer periphery thereof so that the outer retaining ring 863 is allowed to bend in the radial direction. .
【０００５】以上のような提案構造によると、外側止め
輪８６３は切欠き部８６３ａの存在によって適宜に径方
向に撓ませながら周溝８１１内に容易に嵌め込むことが
できると同時に、周溝８１１内に嵌め込まれた後にはそ
の撓みが解消される結果、周溝８１１の精度が多少悪く
ても常に適正な姿勢で装着される。そして、シール部材
８６２はシールリップ８６２ａを除く部分が内側止め輪
８６１と外側止め輪８６３の間に挟み込まれた状態で周
溝８１１内に嵌め込まれるため、軸受の端面に平行な姿
勢を維持することができる。According to the proposed structure described above, the outer retaining ring 863 can be easily fitted into the peripheral groove 811 while appropriately bending in the radial direction due to the presence of the notch portion 863a, and at the same time, the peripheral groove 811 is formed. After being fitted into the peripheral groove 811, the bending is eliminated, so that the circumferential groove 811 is always mounted in an appropriate posture even if the accuracy is somewhat poor. Since the seal member 862 is fitted into the circumferential groove 811 with a portion excluding the seal lip 862a being sandwiched between the inner retaining ring 861 and the outer retaining ring 863, the posture parallel to the end face of the bearing is maintained. Can be.
【０００６】[0006]
【発明が解決しようとする課題】ところで、薄肉の転が
り軸受においては、内輪８２のシールリップ８６２ａと
の接触面についても熱処理歪み等によって真円度等が悪
化することに起因して、以上の提案に係る密封装置を用
いても以下の問題が生じる。However, in the case of a thin rolling bearing, the above-mentioned proposal has been made because the roundness of the contact surface of the inner ring 82 with the seal lip 862a is deteriorated due to heat treatment distortion and the like. The following problems occur even when the sealing device according to the above is used.
【０００７】すなわち、内輪８２のシールリップ８６２
ａの当接面の真円度精度が悪くなると、シールリップ８
６２ａと内輪８２との接触が周方向に一様とならなくな
り、その結果、シール部材８６２として合成樹脂のよう
に比較的硬質でその形状を維持できる材料を用いれば問
題はないが、各種合成ゴムをはじめとするエラストマー
のような弾性材料を用いた場合には、軸受の回転時にシ
ールリップ８６２ａと内輪８２との摺動接触によってシ
ール部材８６２が次第に内輪８２側に引き出され、シー
ル部材８６２が周溝８１１から抜け出てしまうという問
題がある。That is, the seal lip 862 of the inner ring 82
If the accuracy of the roundness of the contact surface a becomes poor, the seal lip 8
There is no problem if the contact between the inner ring 82a and the inner ring 82 is not uniform in the circumferential direction. As a result, there is no problem if a relatively hard material that can maintain the shape, such as synthetic resin, is used as the seal member 862. When an elastic material such as an elastomer is used, the seal member 862 is gradually pulled out toward the inner ring 82 by sliding contact between the seal lip 862a and the inner ring 82 when the bearing rotates, and the seal member 862 is There is a problem that it gets out of the groove 811.
【０００８】また、内輪８２のシールリップ８６２ａの
接触面の真円度等の悪化により、シールリップ８６２ａ
の内周面（先端面）と、内輪８２の斜面８２１より外側
に位置する小径の円筒面８２２とが接触し、それに加え
て、上記のようにシール部材８６２が周溝８１１から引
き出されることによるシール部材８６２と内輪８２の過
度の接触によって、軸受の回転トルクの増大、発熱量の
増大といった問題も生じる。Also, due to the deterioration of the roundness of the contact surface of the seal lip 862a of the inner ring 82, the seal lip 862a
And the small-diameter cylindrical surface 822 located outside the inclined surface 821 of the inner ring 82 in contact with the inner peripheral surface (tip surface) of the inner ring 82, and in addition, the sealing member 862 is drawn out from the peripheral groove 811 as described above. Excessive contact between the seal member 862 and the inner ring 82 also causes problems such as an increase in rotational torque of the bearing and an increase in heat generation.
【０００９】本発明はこのような実情に鑑みてなされた
もので、シール部材としてゴムをはじめとする弾性材料
を用いた接触型の密封装置において、その主たる目的
は、薄肉の転がり軸受に装着しても、そのシール部材が
抜け落ちることのない転がり軸受用密封装置を提供する
ことにあり、また、他の目的は、密封装置の軌道輪に対
する接触によるトルクの増大および発熱量の増大が発生
しにくい転がり軸受用密封装置を提供することにある。The present invention has been made in view of such circumstances, and a main object of a contact-type sealing device using an elastic material such as rubber as a sealing member is to mount the device on a thin rolling bearing. However, it is another object of the present invention to provide a sealing device for a rolling bearing in which the sealing member does not come off, and it is another object that an increase in torque and an increase in heat generation due to contact of the sealing device with a raceway are unlikely to occur. An object of the present invention is to provide a sealing device for a rolling bearing.
【００１０】[0010]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の転がり軸受用密封装置は、転がり軸受の外
輪と内輪との間に形成される環状空間の軸方向端部を密
封するための密封装置であって、外輪の端面近傍の内周
面に形成される周溝内に軸方向内側から順に嵌め込まれ
る内側止め輪、リング状の弾性部材からなるシール部
材、および外側止め輪とからなり、上記内側止め輪およ
び外側止め輪はそれぞれリング状の金属板によって構成
されているとともに、上記シール部材はその内周のシー
ルリップが内輪に当接して接触密封部を形成し、かつ、
このシール部材と内側止め輪とが相互に接着一体化され
ていることによって特徴づけられる（請求項１）。In order to achieve the above-mentioned object, a sealing device for a rolling bearing according to the present invention seals an axial end of an annular space formed between an outer ring and an inner ring of a rolling bearing. A sealing device, a sealing member made of a ring-shaped elastic member, and an outer retaining ring, which are sequentially fitted in a circumferential groove formed on the inner peripheral surface near the end surface of the outer ring from the inside in the axial direction. The inner retaining ring and the outer retaining ring are each formed of a ring-shaped metal plate, and the sealing member forms a contact sealing portion with an inner peripheral sealing lip abutting on the inner ring, and
The seal member and the inner retaining ring are characterized by being integrally bonded to each other (claim 1).
【００１１】ここで、本発明においては、上記シール部
材と内側止め輪とを相互に接着一体化することに代え
て、このシール部材と内側止め輪とを一体成形した構成
を採用してもよい（請求項２）。Here, in the present invention, instead of bonding and integrating the seal member and the inner retaining ring with each other, a configuration in which the seal member and the inner retaining ring are integrally formed may be adopted. (Claim 2).
【００１２】また、以上の請求項１または請求項２に係
る発明においては、上記シール部材を、その内周のシー
ルリップが内輪の端面近傍に形成されて端面側に小径と
なる向きの斜面に対して当接させるとともに、そのシー
ルリップ先端の内周面と、内輪の上記斜面よりも端面側
に形成される円筒面との間には、当該転がり軸受のラジ
アル隙間よりも０．３ｍｍ以上大きい隙間を形成した構
成（請求項３）を採用することが望ましい。Further, in the invention according to claim 1 or 2, the seal member is formed on a slope having an inner peripheral seal lip formed near the end face of the inner race and having a small diameter toward the end face. Between the inner peripheral surface of the tip of the seal lip and the cylindrical surface formed on the end surface side of the inner ring on the end surface side with respect to the slope, which is 0.3 mm or more larger than the radial gap of the rolling bearing. It is desirable to adopt a configuration in which a gap is formed (claim 3).
【００１３】本発明は、内側止め輪とゴム等の弾性材料
からなるシール部材とを一体化することにより、シール
部材の周溝からの抜け落ちを防止すると同時に、シール
部材が周溝から引き出されて必要以上に内輪に対して接
触することを防止するものである。According to the present invention, the inner retaining ring and the seal member made of an elastic material such as rubber are integrated to prevent the seal member from falling off from the peripheral groove, and at the same time, the seal member is pulled out from the peripheral groove. This prevents the inner ring from contacting more than necessary.
【００１４】すなわち、外側止め輪は金属板であるが故
に、周溝内に嵌め込まれることによって外れることがな
く、その外側止め輪と内側止め輪の間に挟み込まれるシ
ール部材を、内側止め輪に対して接着一体化し（請求項
１）、あるいは内側止め輪と一体成形する（請求項２）
ことにより、内輪との摺動接触によりシール部材に対し
て周溝から引き出す向きの力が作用しても、シール部材
が実際に周溝から引き出されることを阻止することがで
きる。また、シール部材が周溝から引き出されないこと
から、そのシールリップが必要以上に内輪と接触するこ
とを防止することができ、トルクおよび発熱量の増大も
生じにくい。That is, since the outer retaining ring is a metal plate, the outer retaining ring does not come off by being fitted into the circumferential groove, and the sealing member sandwiched between the outer retaining ring and the inner retaining ring is attached to the inner retaining ring. Adhesively and integrated (Claim 1) or integrally molded with the inner retaining ring (Claim 2)
Thus, even if a force is applied to the seal member from the circumferential groove due to sliding contact with the inner ring, the seal member can be prevented from actually being drawn out of the circumferential groove. Further, since the seal member is not pulled out from the circumferential groove, it is possible to prevent the seal lip from contacting the inner ring more than necessary, and it is difficult to increase the torque and the heat generation.
【００１５】そして、請求項３に係る発明の構成の採用
により、内輪のシールリップとの当接面の真円度精度が
熱処理による歪み等によって悪化しても、その真円度は
一般に０．３ｍｍを越えることはないことから、転がり
軸受に対する負荷によりラジアル隙間Ｒｓだけ外輪と内
輪との径方向位置が任意の向きに変化しても、シールリ
ップの内周面（先端面）が内輪の斜面より端面側の円筒
面に対して接触することがなく、請求項１または２の構
成との併用によってシール部材が周溝から引き出されず
に常に一定の位置に固定されることと併せて、シール部
材は常にそのシールリップの側面が内輪の斜面に対して
接触する、いわゆるフェースシールを構成し、トルクお
よび発熱量の増大の抑制効果をより一層確実なものとす
ることができる。According to the third aspect of the present invention, even if the accuracy of the roundness of the contact surface of the inner ring with the seal lip is deteriorated by distortion due to the heat treatment, the roundness is generally 0.1 mm. Since it does not exceed 3 mm, even if the radial position between the outer ring and the inner ring changes in an arbitrary direction by the radial gap Rs due to the load on the rolling bearing, the inner peripheral surface (tip surface) of the seal lip is inclined to the inner ring. The sealing member is not fixed to a fixed position without being drawn out from the peripheral groove by using together with the configuration according to claim 1 or 2 without contacting the cylindrical surface on the end surface side. Constitutes a so-called face seal in which the side surface of the seal lip always comes into contact with the slope of the inner ring, and the effect of suppressing an increase in torque and heat generation can be further ensured.
【００１６】[0016]
【発明の実施の形態】以下、図面を参照しつつ本発明の
好適な実施の形態について説明する。図１は本発明を複
列アンギュラ玉軸受に適用した実施の形態の構成を示す
軸平行断面図で、図２はその密封装置６の装着部近傍の
要部拡大断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an axially parallel sectional view showing a configuration of an embodiment in which the present invention is applied to a double-row angular contact ball bearing. FIG. 2 is an enlarged sectional view of a main part near a mounting portion of the sealing device 6.
【００１７】この例における軸受本体は、２列の軌道面
が形成された１つの外輪１と、その各外輪軌道面に対向
する各１列ずつの軌道面が形成された２つの内輪２ａ，
２ｂと、外輪１の各軌道面と各内輪２ａ，２ｂの軌道面
との間の形成される２列のボール軌道のそれぞれに複数
個ずつ挿入されたボール３と、その各ボール３を各ボー
ル軌道内で周方向に一定の間隔で保持する保持器４ａ，
４ｂによって構成されている。そして、外輪１と内輪２
ａ，２ｂの間に形成される環状空間５は、外輪１の両端
面近傍に装着される密封装置６によって密封されてい
る。The bearing body in this example has one outer ring 1 formed with two rows of raceways, and two inner races 2a formed with one row of raceways facing each outer raceway.
2b, a plurality of balls 3 inserted into each of two rows of ball tracks formed between the respective raceways of the outer race 1 and the raceways of the inner races 2a and 2b, and the respective balls 3 Retainers 4a, which are held at regular intervals in the circumferential direction in the track,
4b. And outer ring 1 and inner ring 2
An annular space 5 formed between a and 2b is sealed by a sealing device 6 mounted near both end surfaces of the outer race 1.
【００１８】密封装置６は、内側止め輪６１と、シール
部材６２および外側止め輪６３によって構成されてお
り、このうち、内側止め輪６１および外側止め輪６３
は、例えばＳＵＳ３０４系等のステンレス鋼の薄板材を
リング状に形成したものであり、外側止め輪６３につい
ては、図３にその正面図を誇張して示すように、外周の
１２箇所に等間隔に凹状の切欠き部６３ａが形成されて
いる。一方、シール部材６２はＮＢＲ（ニトリル・ブタ
ジエン・ラバー）製である。そして、このシール部材６
２と内側止め輪６１とは、それぞれの端面部において接
着剤６４を介して相互に接着されている。The sealing device 6 comprises an inner retaining ring 61, a sealing member 62 and an outer retaining ring 63, of which the inner retaining ring 61 and the outer retaining ring 63 are provided.
Is formed by forming a thin plate of stainless steel such as SUS304 into a ring shape. As for the outer retaining ring 63, as shown in an exaggerated front view in FIG. Is formed with a concave notch 63a. On the other hand, the seal member 62 is made of NBR (nitrile butadiene rubber). And this sealing member 6
The inner retaining ring 61 and the inner retaining ring 61 are bonded to each other via an adhesive 64 at their respective end surfaces.
【００１９】以上の各部材からなる密封装置６は、外輪
１の両端面近傍の内周面に形成された周溝１１内に、内
側（軌道面側）から内側止め輪６１、シール部材６１、
外側止め輪６３の順でそれぞれの外縁部が嵌め込まれる
ことによって、外輪１に対して装着されている。ここ
で、前記した外側止め輪６３の切欠き部６３ａの外径寸
法Ｄａは、周溝１１の外側の壁体１１ａの内径寸法ｄａ
と略等しく、外側止め輪６３の外径寸法（最大径）Ｄｍ
は周溝１１の溝底径、つまり底面の内径寸法溝底径ｄｍ
と略等しい。また、周溝１１の内側の壁体１１ｂの内径
寸法ｄｂは上記した外側の壁体１１ａの外径寸法ｄａよ
りも小さく設定されている。一方、内側止め輪６１の外
径寸法は、周溝１１の外側の壁体１１ａの内径寸法ｄａ
よりも僅かに小さく、かつ、内側の壁体１１ｂの内径寸
法ｄｂよりも大きく設定されているとともに、シール部
材６２の外径寸法は周溝１１の底面の内径寸法ｄｍと略
等しく設定されている。また、周溝１１の外側の壁体１
１ａの内側面は、周溝１１の開口側が広くなるように傾
斜している。そして、周溝１１の底面における溝幅ｗ
は、内側止め輪６１、シール部材６２および外側止め輪
６３の幅の合計と略等しい。The sealing device 6 composed of the above members is provided in a circumferential groove 11 formed in the inner peripheral surface near both end surfaces of the outer race 1 from the inside (the raceway side) to the inner retaining ring 61, the sealing member 61, and the like.
The outer retaining ring 63 is attached to the outer ring 1 by fitting the respective outer edges in this order. Here, the outer diameter dimension Da of the notch 63a of the outer retaining ring 63 is equal to the inner diameter dimension da of the outer wall body 11a of the circumferential groove 11.
The outer diameter of the outer retaining ring 63 (maximum diameter) Dm
Is the groove bottom diameter of the circumferential groove 11, that is, the inner diameter dimension of the bottom face, and the groove bottom diameter dm.
Is approximately equal to The inner diameter db of the inner wall 11b of the peripheral groove 11 is set smaller than the outer diameter da of the outer wall 11a. On the other hand, the outer diameter of the inner retaining ring 61 is the inner diameter da of the outer wall 11a of the circumferential groove 11.
The outer diameter of the sealing member 62 is set to be substantially equal to the inner diameter dm of the bottom surface of the circumferential groove 11 while being slightly smaller than the inner wall 11b and larger than the inner diameter db of the inner wall 11b. . Further, the wall 1 outside the peripheral groove 11
The inner surface of 1a is inclined so that the opening side of the circumferential groove 11 becomes wider. And the groove width w on the bottom surface of the circumferential groove 11
Is substantially equal to the sum of the widths of the inner retaining ring 61, the sealing member 62, and the outer retaining ring 63.
【００２０】内輪２ａ，２ｂの外側の端面近傍の外周面
（肩部）には、外側に小径となる向きの斜面２１が形成
されており、その斜面２１よりも外側（端面側）には他
部に比して小径の円筒部２２が形成されている。外輪１
の周溝１１に装着された密封装置６は、そのシール部材
６２の内周のシールリップ６２ａのみが内輪２ａまたは
２ｂに当接するが、その当接部位は内輪２ａもしくは２
ｂの斜面２１である。すなわち、シールリップ６２ａは
その側面部分が内輪２ａもしくは２ｂ内輪２ａもしくは
２ｂの斜面２１に当接し、シールリップ６２ａの先端面
（内周面）が内輪２ａもしくは２ｂの斜面２１より外側
の円筒面２２に当接することはない。この構造を可能と
するために、内輪２の斜面２１より外側の円筒面２２の
外径寸法Ｄｉは、この転がり軸受のラジアル隙間をＲｓ
とすると、シール部材６２のシールリップ６２ａの先端
の内径寸法ｄｉに対して以下の関係に設定されている。 ｄｉ≧Ｄｉ＋Ｒｓ＋０．３ｍｍ ・・・・（１）On the outer peripheral surface (shoulder) near the outer end surfaces of the inner rings 2a and 2b, a slope 21 having a smaller diameter is formed on the outer side, and other slopes are provided on the outer side (end surface side) of the slope 21. A cylindrical portion 22 having a smaller diameter than the portion is formed. Outer ring 1
In the sealing device 6 mounted in the peripheral groove 11, only the seal lip 62a on the inner periphery of the seal member 62 abuts on the inner ring 2a or 2b, but the abutting portion is the inner ring 2a or 2b.
This is the slope 21 of FIG. That is, the side surface portion of the seal lip 62a abuts on the slope 21 of the inner ring 2a or 2b, and the tip surface (inner peripheral surface) of the seal lip 62a has a cylindrical surface 22 outside the slope 21 of the inner ring 2a or 2b. Never abut. In order to enable this structure, the outer diameter Di of the cylindrical surface 22 outside the slope 21 of the inner ring 2 is determined by the radial gap Rs of the rolling bearing.
Then, the following relationship is established with respect to the inner diameter di of the tip of the seal lip 62a of the seal member 62. di ≧ Di + Rs + 0.3 mm (1)
【００２１】以上の実施の形態を転がり軸受に対して装
着するには、まず、内側止め輪６１とシール部材６２と
が接着により一体化された部材を、内側止め輪６１が内
側となるように周溝１１内に嵌め込んだ後、その外側か
ら外側止め輪６３を周溝１１内に嵌め込む。この外側止
め輪６３の周溝１１内への嵌め込みに際しては、外側止
め輪６３を転がり軸受の端面に対して傾斜させた状態で
その半分の外周縁を外輪１の周溝１１内に挿入し、その
状態で、外輪１の端面に対して離隔している残り半分を
当該端面に対して接近させて、径方向に撓ませながら各
切欠き部６３ａの間に位置する大径部分を一つずつ周溝
１１内に挿入していく。このとき、外側止め輪６３の切
欠き部６３ａの存在によって径方向への撓みが容易とな
り、装着作業に特別な治具等を要することがない。In order to mount the above embodiment on a rolling bearing, first, a member in which an inner retaining ring 61 and a seal member 62 are integrated by bonding is attached so that the inner retaining ring 61 is on the inner side. After fitting into the circumferential groove 11, the outer retaining ring 63 is fitted into the circumferential groove 11 from outside. When the outer retaining ring 63 is fitted into the peripheral groove 11, half of the outer peripheral edge is inserted into the peripheral groove 11 of the outer ring 1 while the outer retaining ring 63 is inclined with respect to the end face of the rolling bearing, In this state, the other half separated from the end face of the outer ring 1 is brought close to the end face, and the large-diameter portions located between the notches 63a are bent one by one while being bent in the radial direction. It is inserted into the circumferential groove 11. At this time, the presence of the cutout portion 63a of the outer retaining ring 63 facilitates bending in the radial direction, and does not require a special jig or the like for the mounting operation.
【００２２】そして、外側止め輪６３の全周を周溝１１
内に挿入した装着状態においては、装着時の撓みが周溝
１１内で解消され、周溝１１の真円度が熱処理歪み等に
よって多少悪化していても外輪１に対して確実に装着さ
れる。この外側止め輪６３の装着状態においては、ゴム
製の柔軟なシール部材６２はその内側が内側止め輪６１
に接着されているため、シールリップ６２ａを除く部分
の姿勢が軸受の端面に平行な姿勢に保たれるとともに、
外側が外側止め輪６３によって押さえられた状態とな
り、これらの各構成部材からなる密封装置６は外輪１に
対して確実に装着された状態となる。そして、この装着
状態においては、シールリップ６２ａの側面部分が内輪
２ａ，２ｂの肩部の斜面２１にのみ当接して接触密閉部
が形成される。Then, the entire circumference of the outer retaining ring 63 is
In the mounted state inserted into the outer ring 1, the bending at the time of mounting is eliminated in the circumferential groove 11, and the round groove 11 is securely mounted to the outer ring 1 even if the roundness of the circumferential groove 11 is slightly deteriorated due to heat treatment distortion or the like. . In the mounted state of the outer retaining ring 63, the inside of the flexible sealing member 62 made of rubber has the inner retaining ring 61.
, So that the position of the portion except for the seal lip 62a is kept parallel to the end surface of the bearing,
The outer side is pressed by the outer retaining ring 63, and the sealing device 6 including these components is securely mounted on the outer ring 1. In this mounted state, the side surface portion of the seal lip 62a abuts only on the slope 21 of the shoulder of the inner races 2a, 2b to form a contact sealing portion.
【００２３】以上の本発明の実施の形態によると、転が
り軸受の外輪１と内輪２ａ，２ｂとの相対的回転に際し
て、シール部材６２のシールリップ６２ａの内周面と内
輪２ａ，２ｂの円筒面２２との寸法的関係は前記（１）
式に示した通りであるから、転がり軸受に対する負荷に
より外輪１と内輪２ａ，２ｂとの径方向の位置関係がラ
ジアル隙間Ｒｓ分だけ任意の向きに変化しても、０．１
ｍｍ以上の隙間が保たれることになり、しかも、大径・
薄肉の内輪２ａもしくは２ｂの円筒面２２の真円度が熱
処理歪みによって意図せずに悪化しても一般には０．３
ｍｍ以上となることは皆無であるため、シールリップ６
２ａの内周面が内輪２ａ，２ｂの円筒面２２に当接する
ことはなく、転がり軸受のトルクを増大させたり、発熱
量を増大させることがない。According to the above embodiment of the present invention, when the outer race 1 of the rolling bearing and the inner races 2a, 2b rotate relative to each other, the inner peripheral surface of the seal lip 62a of the seal member 62 and the cylindrical surface of the inner races 2a, 2b. The dimensional relationship with 22 is described in (1) above.
Since it is as shown in the equation, even if the radial positional relationship between the outer ring 1 and the inner rings 2a, 2b changes in an arbitrary direction by the radial gap Rs due to the load on the rolling bearing, it is 0.1%.
mm or more, and a large diameter
Even if the circularity of the cylindrical surface 22 of the thin inner ring 2a or 2b is unintentionally deteriorated by heat treatment distortion, it is generally 0.3.
mm, the seal lip 6
The inner peripheral surface of 2a does not come into contact with the cylindrical surface 22 of the inner rings 2a, 2b, so that the torque of the rolling bearing and the amount of heat generated do not increase.
【００２４】そして、シールリップ６２ａの側面部分と
内輪２ａ，２ｂの斜面２１とが長期に渡り摺動接触し、
また、斜面２１が熱処理歪み等によって多少反っていて
も、以上のシール部材６２の姿勢並びに内輪２ａ，２ｂ
との関係は、シール部材６２が内側止め輪６１に対して
接着一体化されているが故に維持され、従来のように弾
性材料からなるシール部材６２が抜け出すといった不具
合は一切生じない。Then, the side surface portion of the seal lip 62a and the slope 21 of the inner rings 2a, 2b are in sliding contact with each other for a long time,
Further, even if the slope 21 is slightly warped due to heat treatment distortion or the like, the posture of the seal member 62 and the inner rings 2a and 2b
Is maintained because the sealing member 62 is bonded and integrated to the inner retaining ring 61, and there is no problem that the sealing member 62 made of an elastic material comes off as in the related art.
【００２５】次に、本発明の他の実施の形態について説
明する。図４はその要部断面図である。この例における
特徴は、先の例においてシール部材６２と内側止め輪６
１とを接着一体化したことに代えて、シール部材６２と
内側止め輪６１とをインサート成形法等によって一体成
形した点にあり、他の構成は軸受本体部および外側止め
輪６３とも同じであり、更には、密封装置６の各構成部
材および外輪１並びに内輪２ａ（２ｂ）の寸法的な構成
についても先の例と全く同じである。この図４の実施の
形態においても、弾性材料からなるシール部材６２は実
質的に金属板製の内側止め輪６１と外側止め輪６３の間
に挟み込まれた状態で周溝１１内に嵌め込まれるため、
その姿勢が一定に維持されるとともに、このシール部材
６２は内側止め輪６１に対して一体化されているため、
シールリップ６２ａと内輪２ａ（２ｂ）との摺動接触に
よって周溝１１から抜け出すことがなく、シールリップ
６２ａの側面部分が内輪２ａ，２ｂの斜面２１にのみ当
接して接触密閉部を形成する状態を維持することができ
る。Next, another embodiment of the present invention will be described. FIG. 4 is a sectional view of the main part. The feature in this example is that the seal member 62 and the inner retaining ring 6 in the previous example are different.
1 in that the sealing member 62 and the inner retaining ring 61 are integrally molded by an insert molding method or the like instead of being integrated by bonding, and the other configuration is the same as that of the bearing body and the outer retaining ring 63. Further, the dimensional configurations of the components of the sealing device 6 and the outer ring 1 and the inner ring 2a (2b) are exactly the same as in the previous example. Also in the embodiment of FIG. 4, the sealing member 62 made of an elastic material is fitted into the circumferential groove 11 while being sandwiched between the inner retaining ring 61 and the outer retaining ring 63 made of a metal plate. ,
Since the posture is maintained constant and the seal member 62 is integrated with the inner retaining ring 61,
A state in which the sealing lip 62a and the inner ring 2a (2b) do not come out of the circumferential groove 11 due to sliding contact, and the side surface portion of the sealing lip 62a contacts only the slope 21 of the inner ring 2a, 2b to form a contact sealing portion. Can be maintained.
【００２６】ここで、図４の実施の形態において、内側
止め輪６１をインサートした状態でシール部材６２を成
形するに当たり、同図に示すように内側止め輪６１の端
面の一部に露出部６１ａを設けた構造を採用することが
好ましい。この露出部６１ａは、シール部材６２の成形
用金型に当接させるためのものであり、このような露出
部６１ａを設けることにより、比較的大径で薄肉の転が
り軸受に装着すべく比較的大径となる内側止め輪６１と
シール部材６２とを、相互に高精度の位置関係のもとに
一体成形することが可能となる。In forming the seal member 62 with the inner retaining ring 61 inserted in the embodiment shown in FIG. 4, an exposed portion 61a is formed on a part of the end face of the inner retaining ring 61 as shown in FIG. It is preferable to adopt a structure provided with. The exposed portion 61a is for contacting the molding die of the seal member 62. By providing such an exposed portion 61a, a relatively large diameter and relatively thin rolling bearing can be mounted. The large diameter inner retaining ring 61 and the sealing member 62 can be integrally formed under a high-precision positional relationship with each other.
【００２７】[0027]
【発明の効果】以上のように、本発明の密封装置によれ
ば、リング状の金属板からなる内側止め輪と外側止め輪
との間にゴム等の弾性材料からなるシール部材を挟み込
んだ状態で、外輪の端面近傍の内周面に形成された周溝
内に嵌め込むとともに、そのシール部材と内側止め輪と
を接着一体化（請求項１）もしくは一体成形して、シー
ル部材のシールリップを内輪の端面近傍の外周面に形成
された斜面に当接させるので、熱処理時等において歪み
やすい比較的大径でＤ／Ｔが８を越えるような薄肉の転
がり軸受に装着して長期にわたりシールリップが内輪に
対して摺動接触しても、従来のようにシールリップが周
溝から抜け出すことがなく、シールリップ側面部分の内
輪外周の斜面に対する接触を維持することができ、トル
クおよび発熱量を増大させる要因となることはない。As described above, according to the sealing device of the present invention, the sealing member made of an elastic material such as rubber is sandwiched between the inner retaining ring made of a ring-shaped metal plate and the outer retaining ring. Then, the seal member is fitted into a circumferential groove formed on the inner peripheral surface near the end surface of the outer ring, and the seal member and the inner retaining ring are integrally bonded (Claim 1) or integrally formed to form a seal lip of the seal member. Abuts on a slope formed on the outer peripheral surface near the end surface of the inner ring, so that it can be mounted on a relatively large-diameter rolling bearing with a relatively large diameter and a D / T exceeding 8 which is easily distorted during heat treatment, etc. Even if the lip makes sliding contact with the inner ring, the seal lip does not come out of the peripheral groove as in the conventional case, and the contact of the side surface of the seal lip with the slope of the outer periphery of the inner ring can be maintained. To It does not become a factor to large is.
【００２８】また、請求項３に係る発明のように、シー
ル部材のシールリップ内周面と内輪の斜面より外側の円
筒面との間に、当該密封装置が装着される転がり軸受の
ラジアル隙間より０．１ｍｍ以上大きな隙間を形成して
おけば、熱処理により内輪の斜面より外側の円筒面の真
円度等が悪化した場合でも、シールリップの内周面がそ
の円筒面に対して接触することを防止することが可能と
なり、トルクおよび発熱量の増大を抑制する効果をより
一層確実なものとすることができる。Further, according to the third aspect of the present invention, the radial clearance of the rolling bearing in which the sealing device is mounted is provided between the inner peripheral surface of the seal lip of the seal member and the cylindrical surface outside the slope of the inner ring. If a gap larger than 0.1 mm is formed, the inner peripheral surface of the seal lip will contact the cylindrical surface even if the roundness of the cylindrical surface outside the slope of the inner ring deteriorates due to heat treatment. Can be prevented, and the effect of suppressing an increase in torque and heat generation can be further ensured.
【図１】本発明を複列アンギュラ玉軸受に適用した実施
の形態の構成を示す軸平行断面図である。FIG. 1 is an axially parallel sectional view showing a configuration of an embodiment in which the present invention is applied to a double-row angular contact ball bearing.
【図２】図１の密封装置６の装着部近傍の要部拡大断面
図である。FIG. 2 is an enlarged sectional view of a main part near a mounting portion of the sealing device 6 of FIG.
【図３】本発明の実施の形態に用いられている外側止め
輪６３の正面図である。FIG. 3 is a front view of an outer retaining ring 63 used in the embodiment of the present invention.
【図４】本発明の実施の他の実施の形態の要部断面図で
ある。FIG. 4 is a cross-sectional view of a main part of another embodiment of the present invention.
【図５】本発明の密封装置を装着するのに適した薄肉タ
イプの転がり軸受の説明図である。FIG. 5 is an explanatory view of a thin-type rolling bearing suitable for mounting the sealing device of the present invention.
【図６】比較的大径で薄肉の転がり軸受に装着するのに
適した従来の密封装置の構造を示す要部断面図である。FIG. 6 is a sectional view of an essential part showing the structure of a conventional sealing device suitable for mounting on a relatively large-diameter, thin-walled rolling bearing.
【図７】図６に用いられている外側止め輪８６３の部分
正面図である。FIG. 7 is a partial front view of an outer retaining ring 863 used in FIG. 6;
１ 外輪 １１ 周溝 ２ａ，２ｂ 内輪 ２１ 斜面 ２２ 円筒面 ３ ボール ４ａ，４ｂ 保持器 ５ 環状空間 ６ 密封装置 ６１ 内側止め輪 ６２ シール部材 ６２ａ シールリップ ６３ 外側止め輪 ６３ａ 切欠き部 DESCRIPTION OF SYMBOLS 1 Outer ring 11 Peripheral groove 2a, 2b Inner ring 21 Slope 22 Cylindrical surface 3 Ball 4a, 4b Cage 5 Annular space 6 Sealing device 61 Inner retaining ring 62 Seal member 62a Seal lip 63 Outer retaining ring 63a Notch
Claims (3)
れる環状空間の軸方向端部を密封するための密封装置で
あって、外輪の端面近傍の内周面に形成される周溝内に
軸方向内側から順に嵌め込まれる内側止め輪、リング状
の弾性部材からなるシール部材、および外側止め輪とか
らなり、上記内側止め輪および外側止め輪はそれぞれリ
ング状の金属板によって構成されているとともに、上記
シール部材はその内周のシールリップが内輪に当接して
接触密封部を形成し、かつ、このシール部材と内側止め
輪とが相互に接着一体化されていることを特徴とする転
がり軸受用密封装置。1. A sealing device for sealing an axial end of an annular space formed between an outer race and an inner race of a rolling bearing, wherein the peripheral groove is formed on an inner circumferential surface near an end surface of the outer race. It comprises an inner retaining ring, a sealing member made of a ring-shaped elastic member, and an outer retaining ring, which are sequentially fitted from the inside in the axial direction, wherein the inner retaining ring and the outer retaining ring are each formed by a ring-shaped metal plate. In addition, the seal member is characterized in that an inner peripheral seal lip abuts on the inner ring to form a contact sealing portion, and the seal member and the inner retaining ring are mutually bonded and integrated. Sealing device for rolling bearings.
において、上記シール部材と内側止め輪とを相互に接着
一体化することに代えて、当該シール部材と内側止め輪
とを一体成形することを特徴とする転がり軸受用密封装
置。2. The sealing device for a rolling bearing according to claim 1, wherein the seal member and the inner retaining ring are integrally formed with each other instead of bonding and integrating the sealing member and the inner retaining ring with each other. A sealing device for a rolling bearing.
ップが内輪の端面近傍に形成されて端面側に小径となる
向きの斜面に対して当接するとともに、そのシールリッ
プ先端の内周面と、内輪の上記斜面よりも端面側に形成
される円筒面との間には、当該転がり軸受のラジアル隙
間よりも０．３ｍｍ以上大きい隙間が形成されることを
特徴とする請求項１または２に記載の転がり軸受用密封
装置。3. The seal member has an inner peripheral seal lip formed in the vicinity of an end surface of the inner ring and abuts against an inclined surface having a small diameter on the end surface side, and has an inner peripheral surface at a tip end of the seal lip. 3. A gap between the inner race and a cylindrical surface formed closer to the end face than the slope is formed to be 0.3 mm or more larger than a radial gap of the rolling bearing. The sealing device for a rolling bearing according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11063624A JP2000257641A (en) | 1999-03-10 | 1999-03-10 | Seal device for rolling bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11063624A JP2000257641A (en) | 1999-03-10 | 1999-03-10 | Seal device for rolling bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000257641A true JP2000257641A (en) | 2000-09-19 |
Family
ID=13234684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11063624A Pending JP2000257641A (en) | 1999-03-10 | 1999-03-10 | Seal device for rolling bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000257641A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003035319A (en) * | 2001-07-24 | 2003-02-07 | Nsk Ltd | Sealed rolling bearing |
| JP2011220488A (en) * | 2010-04-13 | 2011-11-04 | Nsk Ltd | Outer ring rotating type roller bearing, method for detaching seal device of the same, and rolling machine |
| JP2012172724A (en) * | 2011-02-18 | 2012-09-10 | Nsk Ltd | Outer ring rotation-type rolling bearing, and rolling mill |
| JP2012172723A (en) * | 2011-02-18 | 2012-09-10 | Nsk Ltd | Outer ring rotation-type rolling bearing, and rolling mill |
| CN103362956A (en) * | 2013-08-05 | 2013-10-23 | 山东省宇捷轴承制造有限公司 | Angular contact ball bearing |
-
1999
- 1999-03-10 JP JP11063624A patent/JP2000257641A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003035319A (en) * | 2001-07-24 | 2003-02-07 | Nsk Ltd | Sealed rolling bearing |
| JP2011220488A (en) * | 2010-04-13 | 2011-11-04 | Nsk Ltd | Outer ring rotating type roller bearing, method for detaching seal device of the same, and rolling machine |
| JP2012172724A (en) * | 2011-02-18 | 2012-09-10 | Nsk Ltd | Outer ring rotation-type rolling bearing, and rolling mill |
| JP2012172723A (en) * | 2011-02-18 | 2012-09-10 | Nsk Ltd | Outer ring rotation-type rolling bearing, and rolling mill |
| CN103362956A (en) * | 2013-08-05 | 2013-10-23 | 山东省宇捷轴承制造有限公司 | Angular contact ball bearing |
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