JP2003314573A - Roller bearing - Google Patents
Roller bearingInfo
- Publication number
- JP2003314573A JP2003314573A JP2002120931A JP2002120931A JP2003314573A JP 2003314573 A JP2003314573 A JP 2003314573A JP 2002120931 A JP2002120931 A JP 2002120931A JP 2002120931 A JP2002120931 A JP 2002120931A JP 2003314573 A JP2003314573 A JP 2003314573A
- Authority
- JP
- Japan
- Prior art keywords
- slinger
- rolling bearing
- sealing member
- contact
- ring
- 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
- 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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
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】本発明は、転がり軸受に関
し、特に、車両に搭載されるオルタネータなどのエンジ
ン補機類の回転軸を支持するのに好適な転がり軸受に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling bearing, and more particularly to a rolling bearing suitable for supporting a rotating shaft of engine accessories such as an alternator mounted on a vehicle.
【０００２】[0002]
【従来の技術】オルタネータは自動車エンジンルーム内
に取り付けられ、ボディに覆われているが、オルタネー
タは路面からの水、泥水の跳ね上げなどにより、オルタ
ネータ内部の軸受に水が浸入して軸受の回転不具合、錆
が発生する場合がある。また、エンジンルームの洗浄に
高圧水噴射などを用いることがあり、これによりオルタ
ネータ内部に水が浸入し、オルタネータ軸受に錆が発生
する場合もある。2. Description of the Related Art An alternator is installed in an automobile engine room and is covered by a body. However, the alternator is rotated by water or muddy water splashing from the road surface, causing water to enter a bearing inside the alternator. Problems and rust may occur. In addition, high-pressure water injection may be used for cleaning the engine room, which may cause water to enter the alternator and cause rust on the alternator bearing.
【０００３】一方、オルタネータ等のエンジン補機類
は、車種ごとの様々な制約によりエンジンルーム内での
搭載位置、向きは様々であり、必ずしも上述のようにオ
ルタネータ内部に水が浸入した場合に、完全に対処でき
ていなかった。On the other hand, engine accessories such as alternators have various mounting positions and orientations in the engine room due to various restrictions depending on the vehicle type, and as described above, when water enters the alternator, I couldn't handle it completely.
【０００４】従来、耐水性を向上させた軸受としては、
特開２０００−１８２６０号公報、実開平１−１６６８
１６号公報記載のように、シールの外部にスリンガを備
えた軸受がある。Conventionally, as a bearing having improved water resistance,
Japanese Unexamined Patent Application Publication No. 2000-18260, Japanese Utility Model Publication No. 1-1668.
As described in Japanese Patent No. 16, there is a bearing having a slinger outside the seal.
【０００５】[0005]
【発明が解決しようとする課題】これらの軸受をオルタ
ネータに適用することが考えられるが、オルタネータの
ような高温・高速条件下では、従来使用されているオル
タネータ用軸受のシールリップ設計思想が適応できない
ため、これらの軸受は利用が困難である。また、シール
の外にスリンガを取り付けたものは非回転時にシールと
スリンガとのクリアランス部から毛細管現象によって水
が浸入し、耐水性に改善の余地があった。さらに、特開
平８−３２２１８５号公報記載のようにオルタネータの
構造自体で軸受への水浸入を防ぐことも提案されている
が、この場合、オルタネータの構造が限定されてしま
う。It is conceivable to apply these bearings to an alternator, but under the high temperature and high speed conditions such as an alternator, the seal lip design concept of the conventionally used alternator bearing cannot be applied. Therefore, these bearings are difficult to use. Further, in the case where the slinger is attached to the outside of the seal, water enters through the clearance between the seal and the slinger due to a capillary phenomenon during non-rotation, and there is room for improvement in water resistance. Further, as described in Japanese Patent Application Laid-Open No. 8-322185, it has been proposed to prevent water from entering the bearing by the structure of the alternator itself, but in this case, the structure of the alternator is limited.
【０００６】そこで、本発明は、オルタネータなどの使
用条件に対応でき、軸受の回転、停止状態にかかわらず
外部からの水などの異物の浸入や軸受内部からのグリー
ス漏れを防ぐことができるとともに、オルタネータ等の
エンジン補機類の構造を変えずに装着できる転がり軸受
を提供することを目的とする。Therefore, the present invention can cope with usage conditions of an alternator and the like, and can prevent foreign matter such as water from entering from outside and grease leakage from the inside of the bearing regardless of the rotating or stopped state of the bearing. An object of the present invention is to provide a rolling bearing that can be mounted without changing the structure of engine accessories such as an alternator.
【０００７】[0007]
【課題を解決するための手段】本発明の上記目的は、外
輪と、内輪と、前記外輪と前記内輪との間に転動自在に
設けられた複数の転動体と、円環状に形成され前記外輪
の内径面の軸方向両端部に固定された一対の密封部材と
を備えた転がり軸受において、前記各密封部材と前記転
動体との間に配されて内周縁部が前記内輪の外径面に固
定された円環状の一対のスリンガを有し、前記密封部材
の少なくとも一部が円周方向に渡って前記スリンガに接
触していることを特徴とする転がり軸受によって達成さ
れる。The above object of the present invention is to form an outer ring, an inner ring, a plurality of rolling elements rotatably provided between the outer ring and the inner ring, and to form an annular shape. In a rolling bearing including a pair of sealing members fixed to both axial ends of an inner diameter surface of an outer ring, an inner peripheral edge portion disposed between each of the sealing members and the rolling element has an outer diameter surface of the inner ring. It is achieved by a rolling bearing characterized in that it has a pair of annular slingers fixed to each other, and at least a part of the sealing member is in contact with the slinger in the circumferential direction.
【０００８】上記の構成を有する転がり軸受によれば、
スリンガが密封部材に対して軸方向内側に設けられる構
成としたため、外部から水などの異物が浸入することを
防止できる上、該軸受を取り付ける対象物に影響される
ことなくスリンガを軸受に設けることができる。つま
り、それぞれ構造の異なるオルタネータなどのエンジン
補機類において、回転軸を支承する転がり軸受にエンジ
ン補機類と構造上干渉することがないようにスリンガを
組み付けることが可能である。また、軸受の回転状態に
かかわらず、スリンガを密封部材の外側に設けた場合と
同様に、外部から水などの異物が浸入することを防止す
ることができる。さらに、転がり軸受内部からグリース
などが漏れ出ることを防止することができる。According to the rolling bearing having the above structure,
Since the slinger is arranged axially inside the sealing member, foreign matter such as water can be prevented from entering from the outside, and the slinger can be provided on the bearing without being affected by the object to which the bearing is mounted. You can That is, in engine accessories such as alternators having different structures, it is possible to assemble the slinger so that the rolling bearings that support the rotating shaft do not structurally interfere with the engine accessories. Further, foreign matter such as water can be prevented from entering from the outside regardless of the rotation state of the bearing, as in the case where the slinger is provided outside the sealing member. Further, it is possible to prevent grease and the like from leaking out from the inside of the rolling bearing.
【０００９】上記の構成を有する転がり軸受において、
スリンガの外周部が軸方向外側に突出していることが望
ましい。このような構成によれば、スリンガに設けられ
た突出部分が、水などの異物が遠心力でスリンガの外周
側に移動すること及びスリンガの軸方向内側に侵入する
ことを防止するため、転がり軸受の耐水性が向上する。In the rolling bearing having the above structure,
It is desirable that the outer peripheral portion of the slinger protrudes outward in the axial direction. With such a configuration, the protruding portion provided on the slinger prevents foreign matter such as water from moving to the outer peripheral side of the slinger by centrifugal force and entering the slinger in the axial direction. Water resistance is improved.
【００１０】上記の転がり軸受は、スリンガが、円環部
と、円環部の内周縁部から立ち上げられた円筒部とを有
する断面略Ｌ字状の部材であり、少なくとも円環部の軸
方向外側面に密封部材が接触していることが望ましい。
このような構成によれば、密封部材とスリンガとの隙間
から浸入した水などの異物がスリンガの内側に付着し、
スリンガの回転による遠心力で外輪内径面側に移動して
も、シリンダーの円筒部と密封部材とが摺接する箇所に
よって軸受内部への浸入することが防止される。従っ
て、転がり軸受の耐水性がより一層向上する。In the above rolling bearing, the slinger is a member having a substantially L-shaped cross section having an annular portion and a cylindrical portion raised from the inner peripheral edge portion of the annular portion, and at least the shaft of the annular portion. It is desirable that the sealing member is in contact with the outer surface in the direction.
According to such a configuration, foreign matter such as water that has entered through the gap between the sealing member and the slinger adheres to the inside of the slinger,
Even if the outer ring is moved to the inner diameter surface side by the centrifugal force due to the rotation of the slinger, the cylinder portion of the cylinder and the sealing member are prevented from entering the inside of the bearing due to the sliding contact. Therefore, the water resistance of the rolling bearing is further improved.
【００１１】上記の転がり軸受は、スリンガの円環部の
外周縁部が軸方向外側に折り曲げられたフランジ部を有
し、フランジ部が密封部材の少なくとも一部と接触して
いることが望ましい。このような構成によれば、密封部
材の内側に浸入してスリンガの外側に付着した水などの
異物が、スリンガの表面を伝ってスリンガ内側の空間に
浸入することをフランジ部によって防止することができ
る。従って、転がり軸受の耐水性がより一層向上する。It is preferable that the rolling bearing has a flange portion in which an outer peripheral edge portion of the annular portion of the slinger is bent outward in the axial direction, and the flange portion is in contact with at least a part of the sealing member. With such a configuration, the flange portion can prevent foreign matter such as water that has entered the inside of the sealing member and attached to the outside of the slinger from entering the space inside the slinger along the surface of the slinger. it can. Therefore, the water resistance of the rolling bearing is further improved.
【００１２】上記の転がり軸受は、密封部材がスリンガ
側に突設された少なくとも１つの突起部を有し、突起部
の先端が、スリンガと密封部材との接触箇所よりもスリ
ンガの外周側の箇所に接触していることが望ましい。こ
のような構成によれば、転がり軸受の運転時において、
水などの異物が密着部材とスリンガとの摺接する箇所を
通過して密封部材の内側に浸入しても、スリンガと摺接
するように設けられた突起部によって、さらに浸入する
ことを防止することができる。従って、転がり軸受の耐
水性がより一層向上する。密封部材は、樹脂製のシール
部材、または、シールド板であることが望ましい。[0012] In the above rolling bearing, the sealing member has at least one protruding portion protruding toward the slinger side, and the tip of the protruding portion is located on the outer peripheral side of the slinger rather than the contact portion between the slinger and the sealing member. It is desirable to be in contact with. According to such a configuration, during operation of the rolling bearing,
Even if foreign matter such as water passes through the portion where the contact member and the slinger come into sliding contact and enters the inside of the sealing member, the protrusion provided so as to come into slidable contact with the slinger can prevent further entry. it can. Therefore, the water resistance of the rolling bearing is further improved. The sealing member is preferably a resin sealing member or a shield plate.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて詳しく説明する。図１は、本発明の転がり軸
受の第１の実施の形態を示す断面図である。図１におい
て、転がり軸受（以下、転がり軸受ともいう）１０は、
内周面に軌道面１１ａを有する外輪１１と、外周面に軌
道面１２ａを有する内輪１２と、軌道面１１ａ、１２ａ
間に複数配置された玉（転動体）１３とを備えている。
複数の玉１３は、保持器１４によって転がり軸受１０の
周方向に間隔を隔てて保持されている。なお、転がり軸
受１０は、図中一点鎖線で示す中心線Ｃに対して線対称
な構造を有しており、他の図面においても同様である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view showing a first embodiment of a rolling bearing of the present invention. In FIG. 1, a rolling bearing (hereinafter, also referred to as a rolling bearing) 10 is
Outer ring 11 having raceway surface 11a on the inner peripheral surface, inner ring 12 having raceway surface 12a on the outer peripheral surface, and raceway surfaces 11a, 12a
And a plurality of balls (rolling elements) 13 arranged between them.
The plurality of balls 13 are held by a cage 14 at intervals in the circumferential direction of the rolling bearing 10. The rolling bearing 10 has a structure that is line-symmetric with respect to the center line C shown by the alternate long and short dash line in the drawings, and the same applies to the other drawings.
【００１４】図１に示すように、転がり軸受１０におい
て、玉１３の軸方向両側には円環状の密封部材１５が設
けられている。本実施の形態において、密封部材１５は
樹脂製のシール部材である。シール部材の材質は、例え
ば、ニトリル系ゴム、アクリル系ゴム、フッ素系ゴム、
シリコン系ゴムである。密封部材１５の外周縁部が外輪
１１の軸方向両端に周方向に設けられた一対の溝１１ｂ
に嵌合され、内周縁部が内輪側に延びている。密封部材
１５は、転がり軸受１０の軸方向視、つまり、図１中、
右側から見た場合、外輪１１と内輪１２と玉１３とに区
画される空間を塞ぐ状態で配されている。As shown in FIG. 1, in the rolling bearing 10, annular sealing members 15 are provided on both sides of the ball 13 in the axial direction. In the present embodiment, the sealing member 15 is a resin sealing member. The material of the seal member is, for example, nitrile rubber, acrylic rubber, fluorine rubber,
It is a silicone rubber. The outer peripheral edge portion of the sealing member 15 is a pair of grooves 11b circumferentially provided at both axial ends of the outer ring 11.
And the inner peripheral edge portion extends to the inner ring side. The sealing member 15 is viewed in the axial direction of the rolling bearing 10, that is, in FIG.
When viewed from the right side, the outer ring 11, the inner ring 12, and the balls 13 are arranged so as to close a space defined by the balls.
【００１５】内輪１２の外径面の軸方向両端には、外径
面の径寸法が小さくされた段部１７が設けられている。
それぞれの段部１７に円環状のスリンガ１６が嵌合され
ている。スリンガ１６は、円環部１６ａと、この円環部
１６ａの内周縁部から垂直方向に立設された中空円筒部
１６ｂとを有している。言い換えれば、スリンガ１６
は、断面略Ｌ字状の部材である。スリンガ１６の材質
は、例えば、各種鋼板、アルミニウムなどの金属であ
る。At both axial ends of the outer diameter surface of the inner ring 12, stepped portions 17 having a smaller outer diameter surface are provided.
An annular slinger 16 is fitted in each step portion 17. The slinger 16 has an annular portion 16a and a hollow cylindrical portion 16b which is erected vertically from the inner peripheral edge of the annular portion 16a. In other words, the slinger 16
Is a member having a substantially L-shaped cross section. The material of the slinger 16 is, for example, various steel plates or metals such as aluminum.
【００１６】スリンガ１６を内輪１２の段部１７に固定
した状態で、円環部１６ａの一方の面の内周縁部が、段
部１７を構成する軸受径方向に略平行な面（以下、平行
支持面という。）１７ａに当接している。また、スリン
ガ１６の円筒部１６ｂの内周面が、段部１７を構成する
軸受径方向に略垂直な面（以下、垂直支持面という。）
１７ｂを有する小径部に嵌合している。With the slinger 16 fixed to the step portion 17 of the inner ring 12, the inner peripheral edge portion of one surface of the annular portion 16a is substantially parallel to the bearing radial direction forming the step portion 17 (hereinafter referred to as "parallel"). It is in contact with 17a. In addition, the inner peripheral surface of the cylindrical portion 16b of the slinger 16 is a surface that is substantially perpendicular to the bearing radial direction that constitutes the step portion 17 (hereinafter referred to as a vertical support surface).
It is fitted to a small diameter portion having 17b.
【００１７】また、スリンガ１６には、円環部１６ａの
外周側が段部を介して軸方向外側（密封部材側）に突出
するように形成された突出部１６ｃを有している。この
ため、密封部材の内側に侵入した水などの異物が、転が
り軸受運転時に遠心力によって円環部の軸方向外側面を
伝って移動することが突出部によって抑制される。Further, the slinger 16 has a protruding portion 16c formed so that the outer peripheral side of the annular portion 16a protrudes axially outside (sealing member side) via the step portion. For this reason, the protrusion prevents the foreign matter such as water that has entered the inside of the sealing member from moving along the axially outer side surface of the annular portion due to centrifugal force during the operation of the rolling bearing.
【００１８】密封部材１５の内周縁部にはシールリップ
１５ａが設けられている。シールリップ１５ａは軸方向
の肉厚が大きく設定されている。密封部材１５を外輪１
１に固定した状態で、シールリップ１５ａの少なくとも
一部が、スリンガ１６の円環部１６ａにおいて、内輪１
２の平行支持面１７ａに当接している箇所に対応する軸
方向外側の面近傍に周方向に渡って接触している。A seal lip 15a is provided on the inner peripheral edge of the sealing member 15. The seal lip 15a is set to have a large axial thickness. The sealing member 15 is the outer ring 1
At least a part of the seal lip 15a is fixed to the inner ring 1 at the annular portion 16a of the slinger 16 in the state of being fixed to
The two parallel supporting surfaces 17a are circumferentially contacted in the vicinity of the axially outer surface corresponding to the portion in contact with the two parallel supporting surfaces 17a.
【００１９】本発明の転がり軸受によれば、スリンガを
密封部材に対して軸方向内側に配しているので、取付対
象物の構造に影響されることなくスリンガを転がり軸受
に設けることができる。このため、オルタネータなどの
エンジン補機類などに適用される転がり軸受において、
密封部材が特有な構造を有する場合であっても、密封部
材とスリンガとが互いに構造上干渉することがない。ま
た、本実施の形態の構成によれば、スリンガと密封部材
とが一部接触しているため、これらの部材の間の隙間に
水などの異物が浸入しても、両者が接触する箇所によっ
て異物がそれ以上浸入することを抑制する。さらに、軸
受内部からのグリース漏れを効果的に防止することがで
きる。従って、信頼性の高い転がり軸受を提供すること
ができる。According to the rolling bearing of the present invention, since the slinger is arranged axially inward of the sealing member, the slinger can be provided on the rolling bearing without being affected by the structure of the object to be mounted. Therefore, in rolling bearings applied to engine accessories such as alternators,
Even if the sealing member has a unique structure, the sealing member and the slinger do not structurally interfere with each other. Further, according to the configuration of the present embodiment, since the slinger and the sealing member are partially in contact with each other, even if foreign matter such as water infiltrates into the gap between these members, depending on where they contact each other. Prevents further intrusion of foreign matter. Furthermore, it is possible to effectively prevent grease leakage from the inside of the bearing. Therefore, a highly reliable rolling bearing can be provided.
【００２０】図２は、本発明の第２の実施の形態にかか
る転がり軸受の断面図を示している。なお、以下に説明
する実施の形態において、すでに説明した部材などと同
等な構成・作用を有する部材等については、図中に同一
符号又は相当符号を付すことにより、説明を簡略化或い
は省略する。本実施の形態の転がり軸受２０において、
スリンガ２６は、円環部２６ａの外周縁部が軸方向外側
に折り曲げられてなるフランジ部２６ｃを有している。
フランジ部２６ｃは、密封部材２５のシールリップ２５
ａより外周縁側に設けられた肉厚部２５ｂと接触するよ
うに形成されている。つまり、本実施の形態において
は、フランジ部２６ｃが前記実施の形態で説明した突出
部と同様の機能を有している。なお、フランジ部２６ｃ
は、水などの異物が浸入しないように設定された所定間
隔を介して、密封部材と近接するように配されていても
よい。FIG. 2 shows a sectional view of a rolling bearing according to a second embodiment of the present invention. It should be noted that, in the embodiments described below, members having the same configurations and functions as the members already described will be denoted by the same reference numerals or corresponding reference numerals in the drawings, and the description thereof will be simplified or omitted. In the rolling bearing 20 of the present embodiment,
The slinger 26 has a flange portion 26c formed by bending an outer peripheral edge portion of an annular portion 26a outward in the axial direction.
The flange portion 26c is the seal lip 25 of the sealing member 25.
It is formed so as to come into contact with a thick portion 25b provided on the outer peripheral side of a. That is, in the present embodiment, the flange portion 26c has the same function as the protruding portion described in the above embodiment. The flange portion 26c
May be arranged in close proximity to the sealing member via a predetermined interval set so that foreign matter such as water does not enter.
【００２１】本実施の形態の転がり軸受によれば、密封
部材の内周縁部の先端とスリンガの円筒部との隙間から
浸入した水などの異物が遠心力によって円環部の外周側
に移動する場合でも、スリンガに形成されたフランジ部
によって、異物が更に転がり軸受内部に浸入することを
防止することができる。また、密封部材がスリンガと２
箇所で接触する構成としたため、水などの異物が密封部
材とスリンガとの隙間を介して転がり軸受内部に浸入す
ることをより一層効果的に抑制することが可能である。According to the rolling bearing of this embodiment, foreign matter such as water that has entered through the gap between the tip of the inner peripheral edge of the sealing member and the cylindrical portion of the slinger moves to the outer peripheral side of the annular portion by centrifugal force. Even in this case, the flange formed on the slinger can prevent foreign matter from further entering the inside of the rolling bearing. Also, the sealing member is a slinger and 2
Since the contact is made at the location, it is possible to more effectively suppress foreign matter such as water from entering the inside of the rolling bearing through the gap between the sealing member and the slinger.
【００２２】図３は、本発明の第２の実施の形態にかか
る転がり軸受の断面図を示している。本実施の形態の転
がり軸受３０は、密封部材３５に上記の実施の形態のよ
うなシールリップが形成されていなく、密封部材３５と
スリンガ３６とが接触していない構造を有する、いわゆ
る、非接触シール構造の転がり軸受である。スリンガ３
６は、円環部３６ａの外周縁部に突出部３６ｃを有し、
密封部材３５の軸方向内側の面に沿った形状を有してい
る。密封部材３５とスリンガ３６とは、水などの異物の
浸入を妨げるように所定の間隔に設定されて近接してい
る。本実施の形態の密封部材３５には、内周縁部より外
周側で、かつ、スリンガ３６の突出部３６ｃの内周側に
対向する箇所に向かって突出する肉厚部３５ａが形成さ
れている。つまり、密封部材３５とスリンガ３６とは、
肉厚部３５ａで接触する構造を有している。このため、
密封部材３５の肉厚部３５ａとスリンガ３６との接触箇
所で水などの異物の浸入を抑制することができる。FIG. 3 shows a sectional view of a rolling bearing according to a second embodiment of the present invention. The rolling bearing 30 according to the present embodiment has a structure in which the sealing member 35 does not have the seal lip as in the above-described embodiment, and the sealing member 35 and the slinger 36 are not in contact with each other. This is a rolling bearing with a sealed structure. Slinger 3
6 has a protrusion 36c at the outer peripheral edge of the annular portion 36a,
It has a shape along the axially inner surface of the sealing member 35. The sealing member 35 and the slinger 36 are set close to each other so as to prevent intrusion of foreign matter such as water. The sealing member 35 of the present embodiment is formed with a thick portion 35a that protrudes toward the location on the outer peripheral side of the inner peripheral edge portion and facing the inner peripheral side of the protruding portion 36c of the slinger 36. That is, the sealing member 35 and the slinger 36 are
It has a structure in which the thick portion 35a contacts. For this reason,
Infiltration of foreign matter such as water can be suppressed at the contact portion between the thick portion 35a of the sealing member 35 and the slinger 36.
【００２３】図４は、本発明の第４の実施の形態にかか
る転がり軸受の断面図を示している。本実施の形態の転
がり軸受４０において、密封部材４５は内周縁部に第１
の実施の形態と同様の構成を有するシールリップ４５ａ
を備えている。シールリップ４５ａは、スリンガ４６の
円環部４６ａにおける、平行支持面４７ａに当接する箇
所に対応する反対側の面に接触している。スリンガ４６
の円環部４６ａの外周縁部には、第１の実施の形態と同
様の突出部４６ｃが形成されている。FIG. 4 shows a sectional view of a rolling bearing according to a fourth embodiment of the present invention. In the rolling bearing 40 of the present embodiment, the sealing member 45 has a first inner peripheral edge portion.
Seal lip 45a having a configuration similar to that of the above embodiment
Is equipped with. The seal lip 45a is in contact with the opposite surface of the annular portion 46a of the slinger 46 corresponding to the portion in contact with the parallel support surface 47a. Slinger 46
A protrusion 46c similar to that of the first embodiment is formed on the outer peripheral edge of the annular portion 46a.
【００２４】さらに、本実施の形態において、密封部材
４５は、図４に示すように、スリンガ４６の突出部４６
ｃの軸方向外側の面に対向する箇所に、軸方向に突設さ
れ、かつ、密封部材４５と一体に形成された環状の突起
部４５ｂを有している。突起部４５ｂは、密封部材４５
の周方向全周に渡って形成されている。転がり軸受４０
の運転時において、突起部４５の先端はスリンガ４６の
突出部４６ｃの軸方向外側の面に摺接している。なお、
本実施の形態において、密封部材４５はゴムからなり、
内部に心金４８を有している。突起部４５ｂは、密封部
材４５の軸受径方向に同心円状に複数設けられていても
よい。Further, in the present embodiment, the sealing member 45 has a protrusion 46 of a slinger 46 as shown in FIG.
An annular projection 45b that is provided so as to project in the axial direction and that is integrally formed with the sealing member 45 is provided at a location facing the axially outer surface of c. The protrusion 45b is a sealing member 45.
Is formed over the entire circumference in the circumferential direction. Rolling bearing 40
During the operation, the tip of the protrusion 45 is in sliding contact with the axially outer surface of the protrusion 46c of the slinger 46. In addition,
In the present embodiment, the sealing member 45 is made of rubber,
It has a core 48 inside. A plurality of protrusions 45b may be concentrically provided in the bearing radial direction of the sealing member 45.
【００２５】本実施の形態の構成によれば、転がり軸受
４０は、スリンガが、密封部材の内周縁部に形成された
シールリップ４５ａと、外周縁部側に形成された突起部
４５ｂとにそれぞれ接触するように構成されている。従
って、スリンガと密封部材との隙間から水などの異物が
浸入する場合、スリンガと密封部材とが接触する二つの
箇所のそれぞれで異物の浸入を妨げる機能が働くため、
更に耐水性能が向上する。According to the structure of the present embodiment, in the rolling bearing 40, the slinger has the seal lip 45a formed on the inner peripheral edge of the sealing member and the protrusion 45b formed on the outer peripheral edge side. Configured to contact. Therefore, when a foreign substance such as water enters from the gap between the slinger and the sealing member, the function of preventing the infiltration of the foreign substance works at each of the two locations where the slinger and the sealing member come into contact with each other.
Further, the water resistance performance is improved.
【００２６】図５は、本発明の第５の実施の形態にかか
る転がり軸受の断面図を示している。本実施の形態の転
がり軸受５０において、密封部材５５は円環状のシール
ド板である。密封部材５５は、外周縁部が外輪５１の内
径面周方向に設けられた一対の溝５１ｂに嵌合され、内
周縁部が内輪側に延びてスリンガ５６の円筒部５６ｂに
近接している。内周縁部の先端部５５ａは軸方向内側に
折り曲げられ、スリンガ５６の軸方向外側の部位で、か
つ、内輪５２の平行支持面５７ａに当接する箇所に対応
する反対側の面に接触している。密封部材５５の先端部
５５ａは、スリンガ５６の周方向全周に渡って接触して
いる。なお、シールド板は、例えば、ステンレス鋼版、
亜鉛メッキ鋼板等の耐食性を有する金属板である。FIG. 5 shows a sectional view of a rolling bearing according to a fifth embodiment of the present invention. In the rolling bearing 50 of this embodiment, the sealing member 55 is an annular shield plate. The sealing member 55 has an outer peripheral edge portion fitted into a pair of grooves 51b provided in the circumferential direction of the inner diameter surface of the outer ring 51, and an inner peripheral edge portion extending toward the inner ring side and close to the cylindrical portion 56b of the slinger 56. The tip portion 55a of the inner peripheral edge portion is bent inward in the axial direction, and is in contact with the surface on the axially outer side of the slinger 56 and the surface on the opposite side corresponding to the portion contacting the parallel support surface 57a of the inner ring 52. . The tip portion 55a of the sealing member 55 is in contact with the slinger 56 over the entire circumference in the circumferential direction. The shield plate is, for example, a stainless steel plate,
A metal plate having corrosion resistance such as a galvanized steel plate.
【００２７】本実施の形態の構成によれば、密封部材が
シールド板である場合でも、スリンガをシール板の内側
に設けることでシールド板の構造に影響されずにスリン
ガを備えた転がり軸受を提供することができる。また、
転がり軸受は、運転時に互いに摺接するスリンガとシー
ル板とを備えているため、水などの異物が転がり軸受内
部に浸入することを抑制することができるため、耐水性
能が向上する。さらに、転がり軸受内部からグリースな
どが漏れることを効果的に防止する。According to the configuration of the present embodiment, even if the sealing member is the shield plate, by providing the slinger inside the seal plate, the rolling bearing provided with the slinger is not affected by the structure of the shield plate. can do. Also,
Since the rolling bearing is provided with the slinger and the sealing plate that are in sliding contact with each other during operation, it is possible to prevent foreign matter such as water from entering the inside of the rolling bearing, thereby improving the water resistance performance. Further, it effectively prevents leakage of grease and the like from the inside of the rolling bearing.
【００２８】なお、本発明は、前述した実施の形態に限
定されるものではなく、適宜な変形、改良などが可能で
ある。例えば、密封部材の内周縁部に二股状に分かれた
シールリップを形成し、それぞれのシールリップがスリ
ンガと接触する構成としてもよい。The present invention is not limited to the above-mentioned embodiments, but can be appropriately modified and improved. For example, it is also possible to form a bifurcated seal lip on the inner peripheral edge of the sealing member, and each seal lip contacts the slinger.
【００２９】[0029]
【発明の効果】以上説明したように、本発明によれば、
オルタネータなどの高温・高速条件に対応でき、軸受の
回転、停止状態にかかわらず外部からの水などの異物の
浸入や軸受内部からのグリース漏れを防ぐことができる
とともにオルタネータなどのエンジン補機類の構造を変
えずに装着できる転がり軸受を提供できる。As described above, according to the present invention,
It can withstand high temperature and high speed conditions such as alternators, prevents foreign matter such as water from entering from outside and grease leaks from inside the bearings regardless of the rotation and stop state of the bearings, and also protects engine accessories such as alternators. It is possible to provide a rolling bearing that can be mounted without changing the structure.
【図１】本発明の第１の実施の形態にかかる転がり軸受
である。FIG. 1 is a rolling bearing according to a first embodiment of the present invention.
【図２】本発明の第２の実施の形態にかかる転がり軸受
である。FIG. 2 is a rolling bearing according to a second embodiment of the present invention.
【図３】本発明の第３の実施の形態にかかる転がり軸受
である。FIG. 3 is a rolling bearing according to a third embodiment of the present invention.
【図４】本発明の第４の実施の形態にかかる転がり軸受
である。FIG. 4 is a rolling bearing according to a fourth embodiment of the present invention.
【図５】本発明の第５の実施の形態にかかる転がり軸受
である。FIG. 5 is a rolling bearing according to a fifth embodiment of the present invention.
転がり軸受 １０、２０、３０、４０、５０
内輪 １１、２１、３１、４１、
５１
外輪 １２、２２、３２、４２、
５２
転動体 １３、２３、３３、４３、
５３
保持器 １４、２４、３４、４４、
５４
密封部材 １５、２５、３５、４５、
５５
スリンガ １６、２６、３６、４６、
５６Rolling bearing 10, 20, 30, 40, 50 Inner ring 11, 21, 31, 41,
51 outer ring 12, 22, 32, 42,
52 rolling elements 13, 23, 33, 43,
53 cage 14, 24, 34, 44,
54 sealing member 15, 25, 35, 45,
55 slinger 16, 26, 36, 46,
56
Claims (7)
の間に転動自在に設けられた複数の転動体と、円環状に
形成され前記外輪の内径面の軸方向両端部に固定された
一対の密封部材とを備えた転がり軸受において、 前記各密封部材と前記転動体との間に配されて内周縁部
が前記内輪の外径面に固定された円環状の一対のスリン
ガを有し、前記密封部材の少なくとも一部が円周方向に
渡って前記スリンガに接触していることを特徴とする転
がり軸受。1. An outer ring, an inner ring, a plurality of rolling elements rotatably provided between the outer ring and the inner ring, and a ring-shaped member fixed to both axial end portions of an inner diameter surface of the outer ring. In a rolling bearing including a pair of sealed members, a pair of annular slingers disposed between the sealing members and the rolling element and having an inner peripheral edge portion fixed to the outer diameter surface of the inner ring are provided. A rolling bearing, wherein at least a part of the sealing member is in contact with the slinger in a circumferential direction.
出していることを特徴とする請求項１に記載の転がり軸
受。2. The rolling bearing according to claim 1, wherein an outer peripheral portion of the slinger protrudes outward in the axial direction.
周縁部から立ち上げられた円筒部とを有する断面略Ｌ字
状の部材であり、少なくとも前記円環部の軸方向外側面
に前記密封部材が接触してい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。3. The slinger is a member having a substantially L-shaped cross section having an annular portion and a cylindrical portion raised from an inner peripheral edge portion of the annular portion, and at least outside the axial portion of the annular portion. The rolling bearing according to claim 1, wherein the sealing member is in contact with a side surface.
り曲げられたフランジ部を有し、該フランジ部が前記密
封部材の少なくとも一部と接触又は近接していることを
特徴とする請求項３に記載の転がり軸受。4. The outer peripheral edge portion of the annular portion has a flange portion bent outward in the axial direction, and the flange portion is in contact with or close to at least a part of the sealing member. The rolling bearing according to claim 3.
れた少なくとも１つの突起部を有し、該突起部の先端
が、前記スリンガと前記密封部材との接触箇所よりも前
記スリンガの外周側の箇所に接触していることを特徴と
する請求項１から４のいずれか１つに記載の転がり軸
受。5. The sealing member has at least one protrusion protruding from the slinger, and a tip of the protrusion has an outer peripheral side of the slinger with respect to a contact portion between the slinger and the sealing member. The rolling bearing according to any one of claims 1 to 4, wherein the rolling bearing is in contact with.
ることを特徴とする請求項１から５のいずれか１つに記
載の転がり軸受。6. The rolling bearing according to claim 1, wherein the sealing member is a resin sealing member.
特徴とする請求項１から５のいずれか１つに記載の転が
り軸受。7. The rolling bearing according to claim 1, wherein the sealing member is a shield plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002120931A JP2003314573A (en) | 2002-04-23 | 2002-04-23 | Roller bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002120931A JP2003314573A (en) | 2002-04-23 | 2002-04-23 | Roller bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003314573A true JP2003314573A (en) | 2003-11-06 |
| JP2003314573A5 JP2003314573A5 (en) | 2005-09-22 |
Family
ID=29537016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002120931A Pending JP2003314573A (en) | 2002-04-23 | 2002-04-23 | Roller bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003314573A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009145216A1 (en) * | 2008-05-27 | 2009-12-03 | 株式会社ジェイテクト | Clutch release bearing |
| JP2014234851A (en) * | 2013-05-31 | 2014-12-15 | 日本精工株式会社 | Rolling bearing with sealing device |
| DE102016212127A1 (en) * | 2016-07-04 | 2018-01-04 | Schaeffler Technologies AG & Co. KG | Sealing arrangement with sealing ring and machine element arrangement |
| US20210071763A1 (en) * | 2019-09-05 | 2021-03-11 | Aktiebolaget Skf | Sealing Device for Wheel Hub Assembly |
| CN115325035A (en) * | 2022-08-09 | 2022-11-11 | 海宁市耐特陶塑轴承股份有限公司 | Precise zirconia ceramic bearing and processing technology thereof |
-
2002
- 2002-04-23 JP JP2002120931A patent/JP2003314573A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009145216A1 (en) * | 2008-05-27 | 2009-12-03 | 株式会社ジェイテクト | Clutch release bearing |
| US8534926B2 (en) | 2008-05-27 | 2013-09-17 | Jtekt Corporation | Clutch release bearing |
| JP2014234851A (en) * | 2013-05-31 | 2014-12-15 | 日本精工株式会社 | Rolling bearing with sealing device |
| DE102016212127A1 (en) * | 2016-07-04 | 2018-01-04 | Schaeffler Technologies AG & Co. KG | Sealing arrangement with sealing ring and machine element arrangement |
| US20210071763A1 (en) * | 2019-09-05 | 2021-03-11 | Aktiebolaget Skf | Sealing Device for Wheel Hub Assembly |
| US11927227B2 (en) * | 2019-09-05 | 2024-03-12 | Aktiebolaget Skf | Sealing device for wheel hub assembly |
| CN115325035A (en) * | 2022-08-09 | 2022-11-11 | 海宁市耐特陶塑轴承股份有限公司 | Precise zirconia ceramic bearing and processing technology thereof |
| CN115325035B (en) * | 2022-08-09 | 2024-04-19 | 海宁市耐特陶塑轴承股份有限公司 | Precise zirconia ceramic bearing and processing technology thereof |
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