JP3149863B2 - Bearings for water pumps and water pumps for water-cooled engines of automobiles - Google Patents

Bearings for water pumps and water pumps for water-cooled engines of automobiles

Info

Publication number
JP3149863B2
JP3149863B2 JP31546798A JP31546798A JP3149863B2 JP 3149863 B2 JP3149863 B2 JP 3149863B2 JP 31546798 A JP31546798 A JP 31546798A JP 31546798 A JP31546798 A JP 31546798A JP 3149863 B2 JP3149863 B2 JP 3149863B2
Authority
JP
Japan
Prior art keywords
shaft
lip
ring
cylindrical portion
outer 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.)
Expired - Fee Related
Application number
JP31546798A
Other languages
Japanese (ja)
Other versions
JPH11223198A (en
Inventor
伸彦 三宅
繁 岩切
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to JP31546798A priority Critical patent/JP3149863B2/en
Publication of JPH11223198A publication Critical patent/JPH11223198A/en
Application granted granted Critical
Publication of JP3149863B2 publication Critical patent/JP3149863B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—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
    • F16C33/7859—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 further sealing element
    • 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
    • F16C19/08—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 two or more rows of 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
    • F16C2360/00—Engines or pumps
    • F16C2360/44—Centrifugal pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、自動車の水冷エンジン
等に好適なウォータポンプ用軸受及びウォータポンプ、
詳しくは、ウォータポンプ回転軸を支持する軸受内に
水、水蒸気などが侵入するのを防止し、同時に軸受内の
グリースの流出を防止するウォータポンプ用軸受及びウ
ォータポンプに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pump bearing and a water pump suitable for a water-cooled engine of an automobile, and the like.
More specifically, the present invention relates to a water pump bearing and a water pump that prevent water, steam, and the like from entering a bearing that supports a water pump rotating shaft, and at the same time, prevent grease from flowing out of the bearing.

【０００２】[0002]

【従来の技術】エンジンの冷却水を圧送するウォータポ
ンプは一般に、インペラが固定された回転軸を、軸方向
に間隔を置いて配した複数個のベアリング（転がり軸
受）によりケーシングに支承して形成され、通常のポン
プと同様に上記軸受内への冷却水の侵入を防止するた
め、軸受はシール付き密封軸受となっている。2. Description of the Related Art In general, a water pump for pumping cooling water for an engine is formed by supporting a rotating shaft, to which an impeller is fixed, on a casing by a plurality of bearings (rolling bearings) spaced at an axial direction. The bearing is a sealed bearing with a seal in order to prevent the cooling water from entering the bearing as in the case of a normal pump.

【０００３】[0003]

【発明が解決しようとする課題】ところがエンジンにお
いては運転、停止が繰り返されるため、上記シール付き
密封軸受は加熱、冷却されて膨張、収縮を繰り返し、シ
ール機能を損ないやすくなっている。However, since the running and stopping of the engine are repeated, the sealed bearing with the seal is repeatedly heated and cooled, and expands and contracts repeatedly, thereby easily impairing the sealing function.

【０００４】特にエンジン運転時にエンジン冷却水が加
熱されることによって発生した水蒸気は、シール装置を
通過して軸受内に侵入しやすくなる。ポンプ回転軸を支
持する軸受内には通常、軸受を潤滑するグリース等の潤
滑剤が収納されているが、上述のようにして軸受内に冷
却水、水蒸気が侵入すると特にこの潤滑剤の潤滑性能、
耐久性が劣下して潤滑不良をきたしポンプ回転軸の回転
抵抗の増大や焼付き等を招く危険がある。[0004] In particular, water vapor generated by heating the engine cooling water during operation of the engine easily passes through the seal device and enters the bearing. Lubricants such as grease for lubricating the bearings are usually stored in the bearings that support the pump rotating shaft. However, when cooling water and water vapor enter the bearings as described above, the lubrication performance of these lubricants is particularly high. ,
There is a danger that poor durability results in poor lubrication, resulting in an increase in rotational resistance of the rotary shaft of the pump, seizure and the like.

【０００５】そこで、従来のこの種の軸受を見てみる
と、例えば実開昭６２−６６０２６号公報記載のものが
知られており、該公報の第２図、第３図および第４図に
開示されているように、軸受は外周部が外輪端部に固定
され、内周部に形成された複数のラジアルリップが軸の
外周面と摺接する構造のシール体によってシールされて
いる。しかし、この種の従来技術にあっては、内周部に
形成されたラジアルリップのみによってシールされてい
るため、エンジン運転時にエンジン冷却水が加熱される
ことによって発生した水蒸気が軸受内に侵入しやすい。A conventional bearing of this type is disclosed, for example, in Japanese Unexamined Utility Model Publication No. Sho 62-66026. FIG. 2, FIG. 3 and FIG. As disclosed, the outer periphery of the bearing is fixed to the outer ring end, and a plurality of radial lips formed on the inner periphery are sealed by a seal body having a structure in which the radial lip is in sliding contact with the outer periphery of the shaft. However, in this type of conventional technology, since the seal is provided only by the radial lip formed on the inner peripheral portion, steam generated by heating the engine cooling water during engine operation enters the bearing. Cheap.

【０００６】また、実開昭６０−１０７４５９号公報記
載のものも知られているが、該従来技術は、複数のラジ
アル接触リップを有する外輪環と、該外輪環のシールリ
ップと接触する金属で形成された内輪環とよりなり、外
輪環の主シールリップを小径側に、補助シールリップを
大径側にそれぞれ外方に突出させて設け、内輪環は外輪
環より小径で、複数の軸方向部をもち、主シールリップ
及び補助シールリップを内輪環のそれぞれの軸方向外周
面に接触させる構造のものであり、補助シールリップは
内輪環と４５゜の角度をもって接触している。しかし、
この種の従来技術にあっては、主シールリップ及び補助
シールリップの二重のシール構造により、エンジン運転
時にエンジン冷却水が加熱されることによって発生した
水蒸気が軸受内に入り込むのを防止するのは効果的であ
るが、主シールリップは外方に向け突出しているために
軸受内のグリースの流出を防止することは不十分であっ
た。[0006] Japanese Patent Application Laid-Open Publication No. Sho 60-107459 is also known, but the prior art discloses an outer ring having a plurality of radial contact lips, and a metal contacting a seal lip of the outer ring. A main seal lip of the outer ring is provided on the small diameter side, and an auxiliary seal lip is provided on the large diameter side so as to protrude outward.The inner ring has a smaller diameter than the outer ring and has a plurality of axial directions. In this structure, the main seal lip and the auxiliary seal lip are brought into contact with the respective outer peripheral surfaces of the inner ring in the axial direction, and the auxiliary seal lip contacts the inner ring at an angle of 45 °. But,
In this type of prior art, by a double sealing structure main seal lip and the auxiliary sealing lip, the vapor generated by the engine cooling water is heated during engine operation is prevented from entering the bearing Was effective, but the main seal lip protruded outwardly, so that it was insufficient to prevent grease from flowing out of the bearing.

【０００７】また、実開昭６２−６９６２５号公報記載
のものも知られている。該従来技術は、自動車のホイー
ルを支持する軸受装置であり、そのシール装置は、補強
環と第１副リップと主リップと第２副リップを有する外
輪側シール環と、第１円筒部と中間部と第２円筒部とを
有する軸側シール環とが設けられており、第２副リップ
は、軸側シール環の内側でラビリンスシールを構成し、
補強環は、円筒部が外輪に固定され、それに続き内輪側
に真直ぐに延びる部分を有する。しかしながら、第１副
リップは補強環と離れており、剛性において劣る。[0007] Japanese Unexamined Utility Model Publication No. 62-69625 is also known. The prior art is a bearing device that supports a wheel of an automobile, and the sealing device includes an outer ring side seal ring having a reinforcing ring, a first sub lip, a main lip, and a second sub lip, a first cylindrical portion and an intermediate portion. A shaft-side seal ring having a portion and a second cylindrical portion, wherein the second sub-lip forms a labyrinth seal inside the shaft-side seal ring;
The reinforcing ring has a portion in which the cylindrical portion is fixed to the outer ring, and subsequently extends straight to the inner ring side. However, the first sub lip is separated from the reinforcing ring, and is inferior in rigidity.

【０００８】本発明は、従来技術の有するこのような問
題点に鑑みなされたものであり、その目的とするところ
は、軸受内部に侵入しようとする冷却水や水蒸気などを
ほぼ確実に防止し、同時に軸受内のグリースの流出を防
止するウォータポンプ用軸受及びウォータポンプを提供
することである。The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to almost certainly prevent cooling water, water vapor, and the like from entering a bearing. Another object of the present invention is to provide a water pump bearing and a water pump for preventing grease from flowing out of the bearing.

【０００９】[0009]

【課題を解決するための手段】上記課題を解決するため
の技術的手段は次の通りである。ケーシングに固定され
た外輪と、一端側にプーリを備え、他端側にインペラを
備えた回転する軸体と、上記外輪と軸体との間に配され
る複数列の転動体と、補強環とゴム、合成樹脂などの弾
性体で形成した第１副リップと主リップと、該主リップ
よりも外形側に位置する第２副リップとを備えた外輪側
シール環および軸体に嵌合固定された第１円筒部と、こ
れよりも外径側に延びた中間部と、これに続き軸方向に
延びた第２円筒部とを有し、軸体と共に回転する軸側シ
ール環とからなるインペラ側のシール装置とによって構
成され、前記主リップが軸側シール環の第１円筒部の外
周面と摺接し、第１副リップが主リップより軸方向内側
の回転部材の外周面と摺接し、第２副リップが主リップ
よりも外径側で軸側シール環と摺接し、軸側シール環の
外径側に延びた部分は、外輪との間で隙間を構成してい
ることである。また、ウォータポンプとしては、端部に
インペラを有し、ケーシングに固定された請求項１記載
のウォータポンプ用軸受を使用したことである。The technical means for solving the above problems are as follows. An outer ring fixed to the casing, a rotating shaft body having a pulley on one end side and an impeller on the other end side, a plurality of rows of rolling elements arranged between the outer ring and the shaft body, and a reinforcing ring And a first sub-lip and a main lip formed of an elastic body such as rubber or synthetic resin, and a second sub-lip located on the outer side of the main lip. A first cylindrical portion, an intermediate portion extending radially outward from the first cylindrical portion, and a second cylindrical portion extending in the axial direction following the first cylindrical portion. The main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, and the first sub lip is in sliding contact with the outer peripheral surface of the rotating member axially inside the main lip. , The second sub lip slides on the shaft side seal ring on the outer diameter side of the main lip, and the shaft side seal Portion extending on the outer diameter side of the is that it constitutes a gap between the outer ring. Further, the water pump has a water pump bearing according to claim 1 which has an impeller at an end and is fixed to a casing.

【００１０】[0010]

【作用】本発明の構成によれば、主リップが軸側シール
環の第１円筒部の外周面と摺接することにより、外部か
らの異物の侵入を防止し、第１副リップが回転部材の外
周面と摺接することにより、軸受内のグリースが洩れる
のを防止し、さらに第２副リップが主リップよりも外径
側で軸側シール環と摺接していること、及び軸側シール
環の中間部と第２円筒部により軸受側に侵入しようとす
る冷却水、水蒸気を振り切ることができる。さらに、軸
側シール環の外径側に延びた部分は、外輪との間で隙間
を構成することにより、ウォータポンプ内の冷却水の直
接攻撃を小さくできる。また、一端部を外輪に固定し、
円筒状に形成された中間部を介して他端部が軸体側に延
びるように補強環を構成したので、第１副リップの緊迫
力をもって回転部材の外周面と摺接することができる。According to the structure of the present invention, the main lip is brought into sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, thereby preventing the invasion of foreign matter from the outside, and the first sub lip is formed of the rotating member. The sliding contact with the outer peripheral surface prevents the grease in the bearing from leaking, and the second sub-lip is in sliding contact with the shaft-side seal ring on the outer diameter side from the main lip. The intermediate portion and the second cylindrical portion can shake off the cooling water and steam that are going to enter the bearing side. Furthermore, a portion of the shaft-side seal ring that extends to the outer diameter side forms a gap between the outer ring and the outer ring so that the cooling water in the water pump can be directly cooled.
Close attack can be reduced . Also, fix one end to the outer ring,
Since the reinforcing ring is configured so that the other end extends toward the shaft via the cylindrical intermediate portion, the reinforcing ring can be brought into sliding contact with the outer peripheral surface of the rotating member with the tightening force of the first sub lip.

【００１１】[0011]

【実施例】以下本発明の参考例および実施例を図面をも
とに説明する。図１は、ウォータポンプ用軸受を組込ん
だウォータポンプの本発明の参考例を示す要部縦断面
図、図２は図１の要部拡大断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be explained. FIG. 1 is a vertical sectional view of a main part of a water pump incorporating a water pump bearing according to a reference example of the present invention , and FIG. 2 is an enlarged cross-sectional view of a main part of FIG.

【００１２】10はウォータポンプ用転がり軸受の全体を
表す。101 は転がり軸受10の外輪で、該外輪101 はケー
シング11の内周面に固定され、該外輪101 の内周面には
複数列の軌道溝1011が形成されると共にその両端部にシ
ール溝1012が形成されている。Reference numeral 10 denotes the whole of a rolling bearing for a water pump. Reference numeral 101 denotes an outer ring of the rolling bearing 10. The outer ring 101 is fixed to the inner peripheral surface of the casing 11, and a plurality of rows of raceway grooves 1011 are formed on the inner peripheral surface of the outer ring 101, and seal grooves 1012 are formed at both ends thereof. Are formed.

【００１３】12は前記外輪101 内に複数列の転動体13を
介して嵌挿された軸体で、該軸体12の一端側にはプーリ
130 を備え、他端側にはインペラ14を備えている（図１
参照）。121 は外輪101 の軌道溝1011と対向して軸体12
の外周面に形成された軌道溝である。Reference numeral 12 denotes a shaft fitted into the outer ring 101 via a plurality of rows of rolling elements 13. One end of the shaft 12 is provided with a pulley.
130 and an impeller 14 at the other end (see FIG. 1).
reference). 121 faces the raceway groove 1011 of the outer ring 101 and the shaft 12
Is a raceway groove formed on the outer peripheral surface of the.

【００１４】15は前記外輪101 のインペラ14側のシール
溝1012に固定された外輪側シール環151 と軸側シール環
152 からなるシール装置で、該シール装置15の外輪側シ
ール環151 は補強環1511とゴム、合成樹脂などの弾性体
でもって形成された少なくとも軸方向内向きの第１副リ
ップ1512と軸方向外向きの主リップ1513と該主リップ15
13よりも外径側に位置して軸方向外側に延びた第２副リ
ップ1514とから構成されてなる。また、補強環1511は一
端部1511a が外輪101 に固定され、円筒状に形成された
中間部1511b を介して他端部1511c が軸体側に延びてい
る。Reference numeral 15 denotes an outer ring side seal ring 151 and an axial side seal ring fixed to the seal groove 1012 of the outer ring 101 on the impeller 14 side.
An outer ring side seal ring 151 of the seal device 15 has a reinforcing ring 1511 and at least an axially inward first sub-lip 1512 formed of an elastic body such as rubber or synthetic resin and an axially outer seal ring 151. Oriented main lip 1513 and the main lip 15
13 and a second sub lip 1514 which is located on the outer diameter side and extends outward in the axial direction. One end 1511a of the reinforcing ring 1511 is fixed to the outer ring 101, and the other end 1511c extends toward the shaft via an intermediate portion 1511b formed in a cylindrical shape.

【００１５】次に、前記軸側シール環152 は耐腐蝕性に
とむ特殊鋼板例えばステンレス鋼板を用いて成形された
もので、その形状は断面ほぼコ字状にして前記軸体12に
緊密嵌合固定される第１円筒部1521とこれよりも外径側
に延びた中間部1522とこれに続き軸方向内側に延びた第
２円筒部1523とから構成されてなる。Next, the shaft-side seal ring 152 is formed by using a special steel plate for corrosion resistance, for example, a stainless steel plate, and has a substantially U-shaped cross section, and is tightly fitted to the shaft body 12. It is composed of a first cylindrical portion 1521 to be fixed, an intermediate portion 1522 extending radially outward from the first cylindrical portion 1521, and a second cylindrical portion 1523 subsequently extending axially inward.

【００１６】前記外輪側シール環151 の前記第１副リッ
プ1512が軸方向内向きに設けられて軸体12の外周面122
と接触し、主リップ1513が軸方向外向きに設けられて前
記軸側シール環152 の第１円筒部1521の外周面1524と接
してシール部を形成し、第２副リップ1514が軸側シール
環152 の第２円筒部1523の内周面1525との間で接触のシ
ール部を形成する。The first sub lip 1512 of the outer ring side seal ring 151 is provided inward in the axial direction, and the outer peripheral surface 122 of the shaft body 12 is provided.
The main lip 1513 is provided in the axially outward direction, and is in contact with the outer peripheral surface 1524 of the first cylindrical portion 1521 of the shaft-side seal ring 152 to form a seal portion. A seal is formed between the ring 152 and the inner peripheral surface 1525 of the second cylindrical portion 1523.

【００１７】上記参考例において、外輪側シール環151
の第１副リップ1512は軸方向内向きに設けられて軸体12
の外周に接触していることにより軸受内のグリースが洩
れるのを防ぐと共に主リップ1513が軸側シール環152 の
第１円筒部1521の外周面と接することにより外部からの
異物の侵入を防止する中間シールの役目をなしシール部
が形成される。尚、本実施例においては第１副リップ15
12は軸体12の外周に接触していることにより、軸側シー
ル環152 と軸体12とのはめあい面から軸受内のグリース
が洩れるのを防ぐのにも効果的である。また、第２円筒
部1523の端面1526と外輪側シール環151 の側壁1515間の
隙間Ｃが形成される。In the above reference example, the outer ring side seal ring 151
The first sub lip 1512 is provided inward in the axial direction to
The grease in the bearing is prevented from leaking by contacting the outer periphery of the shaft, and the intrusion of foreign matter from the outside is prevented by the main lip 1513 being in contact with the outer peripheral surface of the first cylindrical portion 1521 of the shaft side seal ring 152. A seal part is formed by acting as an intermediate seal. In this embodiment, the first sub lip 15
The contact of the shaft 12 with the outer periphery of the shaft body 12 is also effective in preventing grease in the bearing from leaking from the fitting surface between the shaft side seal ring 152 and the shaft body 12. In addition, between the end surface 1526 of the second cylindrical portion 1523 and the side wall 1515 of the outer ring side seal ring 151
A gap C is formed .

【００１８】また、外輪側シール環151 の第２副リップ
1514が軸側シール環152 の第２円筒部1523の内周面に接
触（または非接触状態）により外部シールの役目をなす
シール部が形成され、また該シール部は、軸側シール環
152 の中間部1522と第２円筒部1523との協働作用により
軸受側に侵入しようとする冷却水、水蒸気を振り切るこ
とができる。The second auxiliary lip of the outer ring side seal ring 151
A seal portion serving as an external seal is formed by contacting (or non-contacting) the inner peripheral surface of the second cylindrical portion 1523 of the shaft side seal ring 152 with the shaft side seal ring 152.
The cooperation between the intermediate portion 1522 and the second cylindrical portion 1523 makes it possible to shake off the cooling water and water vapor that tend to enter the bearing.

【００１９】要するに、本発明の軸受は、第１副リップ
1512が軸体12の外周面と接触、また主リップ1513が第１
円筒部1521の外周面と接触することにより形成されるシ
ール部と、第２副リップ1514が第２円筒部1523の内周面
との間で接触することにより形成されるシール部の二重
構造が形成される。また外輪側シール環151 の第２副リ
ップ1514は、腕部1514a と、該腕部1514a の先端に設け
られた突起1514b とを有し、腕部1514a は軸側シール環
152 の第２円筒部1523と平行に軸方向内側に延び、第２
円筒部1523との間に軸方向シール隙間を形成している。
また、腕部1514a の先端に設けられた突起1514b が、第
２円筒部1523の内周面と接触している。また、仮に摩耗
により接触状態が非接触状態になったとしても、軸方向
シール隙間によるラビリンスシールが形成されているた
め、冷却水、水蒸気等の侵入は防止される。In short, the bearing of the present invention comprises the first sub lip.
1512 is in contact with the outer peripheral surface of the shaft 12, and the main lip 1513 is the first
Double structure of a seal portion formed by contacting the outer peripheral surface of the cylindrical portion 1521 and a seal portion formed by contact of the second auxiliary lip 1514 between the inner peripheral surface of the second cylindrical portion 1523 Is formed. The second sub lip 1514 of the outer ring side seal ring 151 has an arm portion 1514a and a projection 1514b provided at the tip of the arm portion 1514a.
152 extends inward in the axial direction parallel to the second cylindrical portion 1523 of
An axial seal gap is formed between the cylindrical portion 1523 and the cylindrical portion 1523.
Further, a protrusion 1514b provided at the tip of the arm portion 1514a is in contact with the inner peripheral surface of the second cylindrical portion 1523. Further, even if the contact state is changed to the non-contact state due to wear, since a labyrinth seal is formed by the axial seal gap, intrusion of cooling water, water vapor, and the like is prevented.

【００２０】さらに、軸側シール環152 の第２円筒部15
23は、外輪101 の端部よりも軸方向内側に延びて、端面
1526と外輪側シール環151 の側壁1515間に隙間Ｃを形成
することにより、ウォータポンプ内の冷却水の直接攻撃
を小さくできる。Further, the second cylindrical portion 15 of the shaft side seal ring 152
23 extends inward in the axial direction from the end of the outer ring 101 and has an end face
By forming a gap C between the outer ring 1515 and the side wall 1515 of the outer ring side seal ring 151, the cooling water in the water pump is directly attacked.
Can be reduced .

【００２１】また、外輪側シール環151 の補強環1511
は、一端部1511a が外輪101 に固定され、円筒状に形成
された中間部1511b を介して、他端部1511c が軸体側に
延びているので、他端部1511c は一端部1511a より軸方
向外側に位置し、他端部1511cは第１副リップ1512を補
強している。このため、第１副リップ1512は軸体12の外
周面と緊迫力をもって摺接することができ、ガータスプ
リング等を使用する必要がない。The reinforcing ring 1511 of the outer ring side seal ring 151
Since one end 1511a is fixed to the outer ring 101 and the other end 1511c extends toward the shaft via a cylindrical intermediate portion 1511b, the other end 1511c is axially outside the one end 1511a. And the other end 1511c reinforces the first sub lip 1512. For this reason, the first sub lip 1512 can slidably contact the outer peripheral surface of the shaft body 12 with a tightening force, and it is not necessary to use a garter spring or the like.

【００２２】図３は本発明の第２参考例を示す要部拡大
断面図で、前記第１参考例と異なる点は軸側シール環15
2 の第２円筒部1523を半径方向外方に延ばしたフランジ
部1527にある。従って、外輪側シール環151 の側壁1515
とフランジ部1527間の隙間Ｃ 1 が形成される。作用効果
は前記第１参考例と略同一につきその説明を省略する。FIG. 3 is a enlarged sectional view showing a second exemplary embodiment of the present invention, the first reference example differs from the shaft seal ring 15
The second cylindrical portion 1523 is provided on a flange portion 1527 extending radially outward. Therefore, the side wall 1515 of the outer ring side seal ring 151
Gap C 1 between the flange portion 1527 is formed with. The operation and effect are substantially the same as those of the first reference example, and the description thereof is omitted.

【００２３】図４は本発明の第１実施例を示す要部拡大
断面図で、第２参考例と異なる点は軸側シール環152 の
第２円筒部1523の半径方向外方にさらに延びたフランジ
部1527にある。従って、前記フランジ部1527の外周端部
と外輪101 の端部内周面1014間に隙間Ｃ 2 が形成され
る。作用効果は前記第１参考例と略同一につき、その説
明を省略する。[0023] Figure 4 is a enlarged sectional view showing a first embodiment of the present invention differs from the second reference example further extends radially outwardly of the second cylindrical portion 1523 of the shaft seal ring 152 It is on the flange 1527. Therefore, the clearance C 2 is formed between the end portion inner peripheral surface 1014 of the outer peripheral edge and the outer ring 101 of the flange portion 1527. The operation and effect are substantially the same as those of the first embodiment, and the description thereof is omitted.

【００２４】図５は本発明の第２実施例を示す要部拡大
断面図で、前記第１参考例と異なる点は補強環1611を有
する外輪側シール環161 の第１副リップ1612と主リップ
1613の両リップが軸体12に緊密嵌合固定された軸側シー
ル環162 の第１円筒部1621の外周と接触状態にしたとこ
ろと、軸側シール環162 の第２円筒部1623を半径方向外
方に延びたフランジ部1627の側壁1628と外輪101 の端面
1013間との間に隙間Ｃ 3 を形成したところにある。[0024] Figure 5 is a enlarged sectional view showing a second embodiment of the present invention, the first reference example differs from the first auxiliary lip 1612 and the main lip of the outer ring side seal ring 161 having a reinforcing ring 1611
When both lips 1613 are brought into contact with the outer periphery of the first cylindrical portion 1621 of the shaft-side seal ring 162 tightly fitted and fixed to the shaft body 12, and the second cylindrical portion 1623 of the shaft-side seal ring 162 is Side wall 1628 of flange portion 1627 extending outward and end surface of outer ring 101
There is to the formation of the gaps C 3 between between 1013.

【００２５】従って、主リップ1613と第１円筒部1621の
外周面1524間にシール部が形成され、またフランジ部16
27の側壁1628と外輪101 の端面1013間に隙間Ｃ3 が形成
される。作用効果は前記第１参考例と略同一につきその
説明を省略する。Accordingly, a seal is formed between the main lip 1613 and the outer peripheral surface 1524 of the first cylindrical portion 1621, and the flange 16
Clearance C 3 is formed between the end surface 1013 of the 27 sidewall 1628 and the outer ring 101 of. The operation and effect are substantially the same as those of the first reference example, and the description thereof is omitted.

【００２６】[0026]

【発明の効果】以上各実施例にて述べたように、シール
部を三重シール構造としたことにより軸方向スペースを
増すことなく低トルクで、かつ強力なシール機能を如何
なく発揮できる。特に軸の回転に伴う軸側シール環のス
リンガ作用と第２副リップとの相乗効果により更に有効
に機能する。また、補強環を一端部を外輪に固定し、円
筒状に形成された中間部を介して他端部が軸体側に延び
るようにしたので、第１副リップの緊迫力をもって回転
部材の外周面と摺接することができる。[Effect of the Invention] As has described in each embodiment, the sealing portion with low torque without increasing the axial space by having a triple seal structure, and can exhibit how without a strong sealing function. In particular, it functions more effectively due to the synergistic effect of the slinger action of the shaft side seal ring with the rotation of the shaft and the second sub lip. Also, since the reinforcing ring has one end fixed to the outer ring and the other end extending toward the shaft body via the intermediate portion formed in a cylindrical shape, the outer peripheral surface of the rotating member is pressed by the tension force of the first sub lip. Can be in sliding contact with

【００２７】また、主リップが軸側シール環の第１円筒
部の外周面と摺接することにより外部からの異物の侵入
を防止し、第１副リップが回転部材の外周面と摺接する
ことにより、軸受内のグリースが洩れるのを防止し、さ
らに第２副リップが主リップよりも外径側で軸側シール
環と摺接していること及び軸側シール環の中間部と第２
円筒部により軸受側に侵入しようとする冷却水、水蒸気
を振り切ることができる。さらに、軸側シール環の外径
側に延びた部分は外輪との間で隙間を構成することによ
り、ウォータポンプ内の冷却水の直接攻撃を小さくでき
る。又、前記隙間は、すでに存在する外輪を使って構成
するのでコストが安い。そして前記隙間には第３の部材
が介在しないので隙間の寸法管理がしやすい。従って、
軸受寿命の著しい延長が図れることは勿論のこと、ウォ
ータポンプ自体の信頼性を高めることのできるなど本発
明特有の作用効果を奏するものである。Further, the main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, thereby preventing invasion of foreign matter from the outside, and the first sub lip is in sliding contact with the outer peripheral surface of the rotating member. To prevent the grease inside the bearing from leaking, and that the second sub lip is in sliding contact with the shaft side seal ring on the outer diameter side of the main lip, and that the second sub lip is in contact with the intermediate portion of the shaft side seal ring.
The cooling water and the steam that are going to enter the bearing side can be shaken off by the cylindrical portion. Furthermore, the portion of the shaft-side seal ring that extends toward the outer diameter forms a gap between the outer ring and the outer ring, so that direct attack of the cooling water in the water pump can be reduced . In addition, the gap is formed by using the existing outer ring.
Cost is low. And a third member in the gap.
Since there is no interposition, it is easy to control the size of the gap. Therefore,
Not only the bearing life can be significantly extended, but also the water pump itself can be enhanced in reliability, and the effects unique to the present invention can be obtained.

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

【図１】本発明の参考図の要部断面図である。FIG. 1 is a sectional view of a main part of a reference drawing of the present invention.

【図２】図１の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.

【図３】本発明の第２参考例を示す要部拡大断面図であ
る。FIG. 3 is an enlarged sectional view of a main part showing a second reference example of the present invention.

【図４】本発明の第１実施例を示す要部拡大断面図であ
る。FIG. 4 is an enlarged sectional view of a main part showing the first embodiment of the present invention.

【図５】本発明の第２実施例を示す要部拡大断面図であ
る。FIG. 5 is an enlarged sectional view of a main part showing a second embodiment of the present invention.

【符号の説明】[Explanation of symbols]

101：外輪 11：ケーシング 12：軸体 13：転動体 130：プーリ 14：インペラ 15：シール装置 151, 161: 外輪側シール環 1511,1611：補強環 1512,1612：第１副リップ 1514,1614：第２副リップ 1513,1613：主リップ 152, 162：軸側シール環 1521,1621：第１円筒部 1522,1622：中間部 1523,1623：第２円筒部 101: Outer ring 11: Casing 12: Shaft 13: Rolling element 130: Pulley 14: Impeller 15: Seal device 151, 161: Outer ring side seal ring 1511, 1611: Reinforcement ring 1512, 1612: First sub lip 1514, 1614: Second auxiliary lip 1513, 1613: Main lip 152, 162: Shaft side seal ring 1521, 1621: First cylindrical portion 1522, 1622: Middle portion 1523, 1623: Second cylindrical portion

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F04D 29/04 F16C 33/78 F16C 33/80 F16J 15/32 311 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) F04D 29/04 F16C 33/78 F16C 33/80 F16J 15/32 311

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】ケーシングに固定された外輪と、一端側に
プーリを備え、他端側にインペラを備えた回転する軸体
と、上記外輪と軸体との間に配される複数列の転動体
と、補強環とゴム、合成樹脂などの弾性体で形成した第
１副リップと主リップと、該主リップよりも外径側に位
置する第２副リップとを備えた外輪側シール環および軸
体に嵌合固定された第１円筒部と、これよりも外径側に
延びた中間部と、これに続き軸方向に延びた第２円筒部
とを有し、軸体と共に回転する軸側シール環とからなる
インペラ側のシール装置とによって構成され、前記主リ
ップが軸側シール環の第１円筒部の外周面と摺接し、第
１副リップが主リップより軸方向内側で回転部材の外周
面と摺接し、第２副リップが主リップよりも外径側で軸
側シール環と摺接し、軸側シール環の外径側に延びた部
分は、外輪との間で隙間を構成していることを特徴とす
るウォータポンプ用軸受。An outer ring fixed to a casing, a rotating shaft having a pulley on one end and an impeller on the other end, and a plurality of rows of rollers arranged between the outer ring and the shaft. An outer ring side seal ring including a moving body, a reinforcing ring, a first sub lip and a main lip formed of an elastic body such as rubber or synthetic resin, and a second sub lip located on an outer diameter side of the main lip; A shaft having a first cylindrical portion fitted and fixed to the shaft, an intermediate portion extending outwardly from the first cylindrical portion, and a second cylindrical portion extending in the axial direction following the first cylindrical portion; The main lip is in sliding contact with the outer peripheral surface of the first cylindrical portion of the shaft side seal ring, and the first sub lip is a rotating member on the inner side in the axial direction of the main lip. The second sub lip is in sliding contact with the shaft-side seal ring on the outer diameter side of the main lip. Portion extending on the outer diameter side of the shaft seal ring is bearing water pump, characterized in that it constitutes a gap between the outer ring. 【請求項２】端部にインペラを有し、ケーシングに固定
された請求項１記載のウォータポンプ用軸受を使用した
ことを特徴とする自動車の水冷用ウォータポンプ。2. A water pump for water cooling of an automobile, wherein the water pump bearing according to claim 1 has an impeller at an end and is fixed to a casing.
JP31546798A 1990-01-30 1998-10-19 Bearings for water pumps and water pumps for water-cooled engines of automobiles Expired - Fee Related JP3149863B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31546798A JP3149863B2 (en) 1990-01-30 1998-10-19 Bearings for water pumps and water pumps for water-cooled engines of automobiles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31546798A JP3149863B2 (en) 1990-01-30 1998-10-19 Bearings for water pumps and water pumps for water-cooled engines of automobiles

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP8139755A Division JP2890354B2 (en) 1990-01-30 1996-05-10 Bearing seal device for water pump

Publications (2)

Publication Number Publication Date
JPH11223198A JPH11223198A (en) 1999-08-17
JP3149863B2 true JP3149863B2 (en) 2001-03-26

Family

ID=18065717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31546798A Expired - Fee Related JP3149863B2 (en) 1990-01-30 1998-10-19 Bearings for water pumps and water pumps for water-cooled engines of automobiles

Country Status (1)

Country Link
JP (1) JP3149863B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6186507B1 (en) 1997-09-25 2001-02-13 Michael R. Oldenburg Retrofittable severe duty seal for a shaft
US20020011710A1 (en) 1997-09-25 2002-01-31 Oldenburg Michael R. Retrofittable severe duty seal for a shaft
DE102010062583A1 (en) * 2010-12-08 2012-06-14 Robert Bosch Gmbh Hand-held power tool e.g. fretsaw has rotary sealing disk that is seated on and connected to rotor shaft, such that sealing disk is arranged between ball bearing and gear component

Also Published As

Publication number Publication date
JPH11223198A (en) 1999-08-17

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