JP2013060975A - Sealing device and roller bearing device - Google Patents

Sealing device and roller bearing device Download PDF

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Publication number
JP2013060975A
JP2013060975A JP2011198332A JP2011198332A JP2013060975A JP 2013060975 A JP2013060975 A JP 2013060975A JP 2011198332 A JP2011198332 A JP 2011198332A JP 2011198332 A JP2011198332 A JP 2011198332A JP 2013060975 A JP2013060975 A JP 2013060975A
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Prior art keywords
lip
fixed
lip portion
main body
sealing
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JP2011198332A
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Japanese (ja)
Inventor
Hajime Watanabe
肇 渡邉
Tomohiko Kiyonaga
智彦 清永
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JTEKT Corp
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JTEKT Corp
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    • 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
    • F16C33/7873—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 single sealing ring of generally L-shaped cross-section
    • F16C33/7876—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 single sealing ring of generally L-shaped cross-section with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—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 with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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

Abstract

PROBLEM TO BE SOLVED: To provide a sealing device, that can prevent promotion of wear of a lip part and prevent an increase in rotational resistance of a turning wheel.SOLUTION: The sealing device includes: a cored bar 21 attached to an outer ring 3; and a sealing member 25 fixed to the cored bar 21 and contacted with the outer peripheral surface 15 and annular surface 13 of a shaft 2. The sealing member 25 has: a body part 26 fixed to the cored bar 21; a first lip part 27 contacted with the outer peripheral surface 15 extending from the diameter-direction end 26a of the body part 26; and a second lip part 28 contacted with the annular surface 13 extending from the diameter-direction end 26a of the body part 26. The sealing member 25 has a reinforcing member 30 disposed from the base 27b of the first lip part 27 to the base 28b of the second lip part 28. The reinforcing member 30 suppresses the adsorption of the first and second lip parts 27 and 28 on the outer peripheral surface 15 and annular surface 13 when negative pressure is set in a space J.

Description

本発明は、同心状に配置される固定輪と回転輪との間に形成される空間に設けられる密封装置、及び、この密封装置を備えている転がり軸受装置に関する。   The present invention relates to a sealing device provided in a space formed between a fixed wheel and a rotating wheel arranged concentrically, and a rolling bearing device including the sealing device.

自動車等の車両の車体に、車輪を回転可能に取り付けるための装置として、車体側に固定される径方向外側の固定輪と、この固定輪の径方向内側に転動体を介して設けられ車輪取り付け用のフランジ部を有している回転輪とを備えた転がり軸受装置が知られている。
また、この転がり軸受装置では、固定輪と回転輪との間に形成される環状の空間に密封装置が設けられており、この密封装置は、転がり軸受装置内部の潤滑剤の漏洩と、外部からの泥水等の異物の侵入を防止している（例えば、特許文献１参照）。 As a device for rotatably mounting a wheel on the body of a vehicle such as an automobile, a fixed wheel on the radially outer side fixed to the vehicle body side, and a wheel mounted on the radially inner side of the fixed wheel via a rolling element 2. Description of the Related Art A rolling bearing device including a rotating wheel having a flange portion for use is known.
Further, in this rolling bearing device, a sealing device is provided in an annular space formed between the fixed ring and the rotating wheel, and this sealing device is provided with the leakage of lubricant inside the rolling bearing device and from the outside. Intrusion of foreign matter such as muddy water is prevented (see, for example, Patent Document 1).

図３は、このような転がり軸受装置の軸方向アウタ側（車輪側）に設けられている従来の密封装置９０の断面図である。この密封装置９０は、固定輪９１に取り付けられている芯金９２と、この芯金９２に固定されているとともに回転輪９３のシール面９４に接触するシール部材９５とを備えている。シール面９４は、軸方向に延びる（回転輪９３の）外周面９６と、径方向に延びる環状面９８とを有している。   FIG. 3 is a cross-sectional view of a conventional sealing device 90 provided on the axial outer side (wheel side) of such a rolling bearing device. The sealing device 90 includes a cored bar 92 attached to a fixed ring 91, and a seal member 95 fixed to the cored bar 92 and in contact with the sealing surface 94 of the rotating ring 93. The seal surface 94 has an outer peripheral surface 96 (of the rotating wheel 93) extending in the axial direction and an annular surface 98 extending in the radial direction.

シール部材９５は、芯金９２に固定されている本体部８６と、本体部８６から外周面９６へ向かって延びている第１リップ部８７と、本体部８６から環状面９８へ向かって延びている第２リップ部８８及び第３リップ部８９とを有している。
近年では、これらリップ部８７，８８，８９のシール面９４に対する摺動抵抗を低減することを目的として、リップ部８７，８８，８９をできるだけ薄くして剛性を小さくする傾向にある。なお、転がり軸受装置の密封装置における摺動抵抗を低減すると、車輪の回転抵抗が小さくなり、消費燃料の低減に貢献することができる。 The seal member 95 includes a main body portion 86 fixed to the cored bar 92, a first lip portion 87 extending from the main body portion 86 toward the outer peripheral surface 96, and extending from the main body portion 86 toward the annular surface 98. A second lip portion 88 and a third lip portion 89.
In recent years, in order to reduce the sliding resistance of the lip portions 87, 88, 89 with respect to the seal surface 94, the lip portions 87, 88, 89 tend to be as thin as possible to reduce the rigidity. If the sliding resistance in the sealing device of the rolling bearing device is reduced, the rotational resistance of the wheel is reduced, which can contribute to reduction of fuel consumption.

特開２００８−６４１８５号公報（図１、図３参照）JP 2008-64185 A (see FIGS. 1 and 3)

図３において、第１リップ部８７と第２リップ部８８との間には、密閉された空間９９が形成されるが、回転輪９３の回転に伴って、前記転動体を有している軸受部及びこれに隣接して設けられている密封装置９０の温度が上昇すると、この空間９９の内圧が上昇する。そして、所定の内圧に達すると空間９９の空気が外部へ漏れ、その後、回転輪９３の回転数が低下し又は回転が停止すると、密封装置９０及び空間９９の温度が降下し、空間９９の内圧が低下する（負圧となる）。   In FIG. 3, a sealed space 99 is formed between the first lip portion 87 and the second lip portion 88, and the bearing having the rolling element as the rotating wheel 93 rotates. When the temperature of the part and the sealing device 90 provided adjacent thereto increases, the internal pressure of the space 99 increases. When the predetermined internal pressure is reached, the air in the space 99 leaks to the outside. Thereafter, when the rotational speed of the rotating wheel 93 decreases or stops rotating, the temperature of the sealing device 90 and the space 99 decreases, and the internal pressure of the space 99 Decreases (becomes negative pressure).

このように内圧が低下すると、第１及び第２リップ部８７，８８それぞれがシール面９４に吸着されるように弾性変形し、シール面９４に対する第１及び第２リップ部８７，８８それぞれの接触面圧が高くなる。この接触面圧が高い状態のままで、再び回転輪９３の回転が開始されると、第１及び第２リップ部８７，８８の摩耗が促進され、また、回転輪９３の回転抵抗が大きくなる。特に、このように接触面圧が高くなるのは、リップ部８７，８８を薄くして剛性を小さくした場合に顕著に発生する。また、空間９９の内圧が特に低下すると、第１リップ部８７のリップ先端が反転してしまい、密封性能が損なわれてしまうおそれがある。   When the internal pressure is reduced in this way, the first and second lip portions 87 and 88 are elastically deformed so as to be attracted to the seal surface 94, and the first and second lip portions 87 and 88 contact the seal surface 94, respectively. Surface pressure increases. When the rotation of the rotating wheel 93 is started again with this contact surface pressure being high, the wear of the first and second lip portions 87 and 88 is promoted, and the rotational resistance of the rotating wheel 93 increases. . In particular, the increase in the contact surface pressure occurs remarkably when the lip portions 87 and 88 are thinned to reduce the rigidity. Further, when the internal pressure of the space 99 is particularly reduced, the lip tip of the first lip portion 87 is inverted, and the sealing performance may be impaired.

そこで、本発明の目的は、隣り合う二つのリップ部の間に形成される空間の圧力が、温度変化に起因して低下し、両リップ部がシール面に吸着されそうになっても、これを抑制し、両リップ部の摩耗が促進されるのを防止し、また、回転輪の回転抵抗が大きくなるのを防止することができる密封装置、及び、この密封装置を備えた転がり軸受装置を提供することである。   Therefore, an object of the present invention is to reduce the pressure in the space formed between two adjacent lip portions due to a temperature change, even if both lip portions are likely to be adsorbed to the seal surface. A sealing device that can prevent the wear of both lip parts from being promoted and prevent the rotational resistance of the rotating wheel from increasing, and a rolling bearing device equipped with this sealing device. Is to provide.

本発明は、同心状に配置される固定輪と回転輪との間に形成される空間に設けられる密封装置であって、前記固定輪と前記回転輪との内の一方に取り付けられる環状の芯金と、前記芯金に固定されているとともに前記固定輪と前記回転輪との内の他方に設けられた第１及び第２のシール面に接触する環状のシール部材とを備え、前記シール部材は、前記芯金に固定されている本体部と、前記本体部の先端部から前記第１のシール面へ向かって延び当該第１のシール面に接触する第１リップ部と、前記本体部の前記先端部から前記第２のシール面へ向かって延び当該第２のシール面に接触する第２リップ部と、前記第１リップ部の基部から前記第２リップ部の基部にわたって設けられ、当該第１リップ部と当該第２リップ部との間に形成される空間が負圧となった場合に、当該第１及び第２リップ部が前記第１及び第２のシール面に吸着するのを抑制する補強部材と、を有していることを特徴とする。   The present invention is a sealing device provided in a space formed between a fixed wheel and a rotating wheel arranged concentrically, and an annular core attached to one of the fixed wheel and the rotating wheel An annular seal member that is fixed to the cored bar and is in contact with the first and second seal surfaces provided on the other of the fixed ring and the rotating ring, and the seal member A body portion fixed to the core, a first lip portion extending from a tip portion of the body portion toward the first seal surface, and contacting the first seal surface; A second lip portion extending from the tip portion toward the second sealing surface and contacting the second sealing surface; and a base portion of the first lip portion to a base portion of the second lip portion, Formed between one lip and the second lip If during becomes a negative pressure, characterized in that said first and second lip portion has a reinforcing member restrain the adsorption to the first and second sealing surfaces.

本発明によれば、第１及び第２リップ部との間に形成される空間の圧力が、温度変化に起因して負圧になり、両リップ部がシール面に吸着されそうになっても、これを補強部材が抑制するので、シール面に対する両リップ部の接触面圧が過度に高まるのを防ぐことができる。このため、接触面圧が高くなることによって、第１及び第２リップ部の摩耗が促進されるのを防止し、また、回転輪の回転抵抗が大きくなるのを防止することが可能となる。   According to the present invention, even if the pressure in the space formed between the first and second lip portions becomes a negative pressure due to a temperature change, both lip portions are likely to be adsorbed to the seal surface. Since the reinforcing member suppresses this, it is possible to prevent the contact surface pressure of both lip portions against the sealing surface from excessively increasing. For this reason, it becomes possible to prevent the wear of the first and second lip portions from being accelerated by increasing the contact surface pressure, and to prevent the rotational resistance of the rotating wheel from increasing.

また、前記本体部は、前記芯金に接着されている固定部と、前記第１及び第２リップ部と当該固定部とを連結している連結部とを有し、前記連結部は、当該連結部における前記第１及び第２のシール面に向かう双方の方向の剛性を低下させる屈曲部を有しているのが好ましい。
芯金に接着されている固定部からシール面へ向かう方向に沿って連結部を直線状に形成する場合に比べて、連結部が屈曲部を有していることで、連結部におけるシール面に向かう方向の剛性は低下する。第１リップ部の基部から第２リップ部の基部にわたる部分は、上記の補強部材によって剛性が高くなり、第１及び第２リップ部それぞれのシール面に対する追従性は低下するが、屈曲部によって連結部が柔軟となり、この連結部と繋がる第１及び第２リップ部は全体として、シール面に沿って追従することができ、これらリップ部の浮き上がりを防ぐことができる。この結果、密封性が高まる。 The main body has a fixing part bonded to the core metal, and a connecting part that connects the first and second lip parts and the fixing part. It is preferable to have a bent portion that reduces the rigidity in both directions toward the first and second sealing surfaces in the connecting portion.
Compared to the case where the connecting part is formed in a straight line along the direction from the fixed part bonded to the metal core to the sealing surface, the connecting part has a bent part, so that the sealing surface in the connecting part Stiffness in the direction of heading decreases. The portion extending from the base portion of the first lip portion to the base portion of the second lip portion is increased in rigidity by the above-described reinforcing member, and the followability with respect to the sealing surfaces of the first and second lip portions is reduced, but is connected by the bent portion. The portion becomes flexible, and the first and second lip portions connected to the connecting portion can follow the seal surface as a whole, and can prevent the lip portions from being lifted up. As a result, the sealing performance is enhanced.

また、前記第１のシール面は、軸方向に延びる円周面であり、前記第２のシール面は、前記円周面から連続して形成されている径方向に延びる環状面であり、前記円周面に接触する前記第１リップ部及び前記環状面に接触する前記第２リップ部は、前記本体部の前記先端部から互いに反対方向に向かって直線的に延びて形成され、前記補強部材は、前記第１及び第２リップ部がそれぞれ延伸する方向に沿ったテーパ筒形状を有しているのが好ましい。この場合、補強部材の形状が簡単であり、製造が容易となる。   The first seal surface is a circumferential surface extending in the axial direction, and the second seal surface is a radially extending annular surface formed continuously from the circumferential surface, The first lip portion that contacts a circumferential surface and the second lip portion that contacts the annular surface are formed by linearly extending in opposite directions from the tip portion of the main body portion, and the reinforcing member It is preferable that each of the first and second lip portions has a tapered cylindrical shape along the extending direction. In this case, the shape of the reinforcing member is simple and the manufacture becomes easy.

また、本発明の転がり軸受装置は、固定輪と、この固定輪と同心状に配置されている回転輪と、前記固定輪と前記回転輪との間に設けられている複数の転動体と、前記固定輪と前記回転輪との間に形成される空間に設けられている密封装置とを備え、前記密封装置は、前記固定輪と前記回転輪との内の一方に取り付けられている環状の芯金と、前記芯金に固定されているとともに前記固定輪と前記回転輪との内の他方に設けられた第１及び第２のシール面に接触する環状のシール部材とを備え、前記シール部材は、前記芯金に固定されている本体部と、前記本体部の先端部から前記第１のシール面へ向かって延び当該第１のシール面に接触する第１リップ部と、前記本体部の前記先端部から前記第２のシール面へ向かって延び当該第２のシール面に接触する第２リップ部と、前記第１リップ部の基部から前記第２リップ部の基部にわたって設けられ、当該第１リップ部と当該第２リップ部との間に形成される空間が負圧となった場合に、当該第１及び第２リップ部が前記第１及び第２のシール面に吸着するのを抑制する補強部材とを有していることを特徴とする。   Further, the rolling bearing device of the present invention includes a fixed wheel, a rotating wheel disposed concentrically with the fixed wheel, a plurality of rolling elements provided between the fixed wheel and the rotating wheel, A sealing device provided in a space formed between the fixed wheel and the rotating wheel, and the sealing device is an annular shape attached to one of the fixed wheel and the rotating wheel. A cored bar, and an annular seal member fixed to the cored bar and in contact with first and second sealing surfaces provided on the other of the fixed ring and the rotating ring. The member includes a main body portion fixed to the cored bar, a first lip portion that extends from a distal end portion of the main body portion toward the first seal surface, and contacts the first seal surface, and the main body portion. The second sheet extends from the distal end portion toward the second sealing surface. A second lip portion contacting the surface, and a space formed between the base portion of the first lip portion and the base portion of the second lip portion, and the space formed between the first lip portion and the second lip portion is negative. It has a reinforcing member that suppresses the first and second lip portions from adsorbing to the first and second sealing surfaces when pressure is applied.

本発明によれば、密封装置において、第１及び第２リップ部との間に形成される空間の圧力が、温度変化に起因して負圧になり、両リップ部がシール面に吸着されそうになっても、これを補強部材が抑制するので、シール面に対する両リップ部の接触面圧が過度に高まるのを防ぐことができる。このため、接触面圧が高くなることによって、第１及び第２リップ部の摩耗が促進されるのを防止し、また、回転輪の回転抵抗が大きくなるのを防止することが可能となる。   According to the present invention, in the sealing device, the pressure in the space formed between the first and second lip portions becomes a negative pressure due to the temperature change, and both lip portions are likely to be adsorbed on the seal surface. Even if it becomes, since a reinforcement member suppresses this, it can prevent that the contact surface pressure of both the lip | rip parts with respect to a sealing surface increases too much. For this reason, it becomes possible to prevent the wear of the first and second lip portions from being accelerated by increasing the contact surface pressure, and to prevent the rotational resistance of the rotating wheel from increasing.

本発明の密封装置によれば、シール面に対する第１及び第２リップ部の接触面圧が過度に高まるのを防ぐことができ、第１及び第２リップ部の摩耗が促進されるのを防止し、また、回転輪の回転抵抗が大きくなるのを防止することが可能となる。
また、本発明の転がり軸受装置によれば、リップ部の摩耗が促進されるのを防止することで密封装置の寿命が長くなり、また、回転抵抗を小さくすることが可能となる。 According to the sealing device of the present invention, it is possible to prevent the contact surface pressure of the first and second lip portions from excessively increasing against the sealing surface, and to prevent the wear of the first and second lip portions from being promoted. In addition, it is possible to prevent the rotational resistance of the rotating wheel from increasing.
Further, according to the rolling bearing device of the present invention, it is possible to increase the life of the sealing device by preventing the wear of the lip portion from being promoted, and to reduce the rotational resistance.

本発明の密封装置を備えた転がり軸受装置の実施の一形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows one Embodiment of the rolling bearing apparatus provided with the sealing device of this invention. シール面に接触する密封装置の縦断面図である。It is a longitudinal cross-sectional view of the sealing device which contacts a sealing surface. 転がり軸受装置の軸方向アウタ側に設けられている従来の密封装置の断面図である。It is sectional drawing of the conventional sealing device provided in the axial direction outer side of the rolling bearing apparatus.

以下、本発明の実施の形態を図面に基づいて説明する。
図１は、本発明の密封装置を備えた転がり軸受装置の実施の一形態を示す縦断面図である。本実施形態の転がり軸受装置１は、自動車等の車両の車体側にある懸架装置１２に固定され、この懸架装置１２に対して、車輪１１を回転可能に支持することができる車輪用軸受装置である。なお、図１において、この転がり軸受装置１が、車体（懸架装置１２）に取り付けられた状態で、車輪１１が取り付けられる側（図１では左側）が車両アウタ側となり、車体の中央側（図１では右側）が車両インナ側となる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an embodiment of a rolling bearing device provided with a sealing device of the present invention. The rolling bearing device 1 of the present embodiment is a wheel bearing device that is fixed to a suspension device 12 on the vehicle body side of a vehicle such as an automobile, and that can rotatably support a wheel 11 with respect to the suspension device 12. is there. In FIG. 1, in a state where the rolling bearing device 1 is attached to the vehicle body (suspension device 12), the side on which the wheel 11 is attached (left side in FIG. 1) is the vehicle outer side, and the center side of the vehicle body (FIG. 1 is the vehicle inner side.

この転がり軸受装置１は、懸架装置１２に固定される外輪３と、この外輪３と同心状に設けられているシャフト２と、外輪３とシャフト２との間に設けられている複数個の玉（転動体）４と、複数個の玉４を周方向に所定間隔に保持している保持器５とを備えている。さらに、転がり軸受装置１は、外輪３とシャフト２との間に形成されている環状空間Ｈの車両アウタ側に設けられ当該環状空間Ｈを封止している環状のアウタ側密封装置７と、前記環状空間Ｈの車両インナ側に設けられ当該環状空間Ｈを封止している環状のインナ側密封装置６とを備えている。   The rolling bearing device 1 includes an outer ring 3 fixed to the suspension device 12, a shaft 2 provided concentrically with the outer ring 3, and a plurality of balls provided between the outer ring 3 and the shaft 2. (Rolling body) 4 and a cage 5 that holds a plurality of balls 4 at a predetermined interval in the circumferential direction. Furthermore, the rolling bearing device 1 is provided on the vehicle outer side of the annular space H formed between the outer ring 3 and the shaft 2, and the annular outer side sealing device 7 that seals the annular space H; And an annular inner side sealing device 6 that is provided on the vehicle inner side of the annular space H and seals the annular space H.

本実施形態では、外輪３の外周部に、前記懸架装置１２に固定するための取り付けフランジ部３ａが形成されている。つまり、外輪３が、車体側に固定される固定輪である。外輪３の内周面には玉４が転動する複列の軌道面３ｂ，３ｂが形成されている。
シャフト２は、シャフト本体８と、このシャフト本体８のアウタ側の端部から径方向外側に広がる車輪取り付け用のフランジ部１０と、シャフト本体８のインナ側の端部に嵌合している円環状の内輪部材９とを備えている。つまり、シャフト２が、車輪１１が取り付けられる回転輪となる。 In the present embodiment, an attachment flange portion 3 a for fixing to the suspension device 12 is formed on the outer peripheral portion of the outer ring 3. That is, the outer ring 3 is a fixed wheel fixed to the vehicle body side. On the inner peripheral surface of the outer ring 3, double-row raceway surfaces 3b, 3b on which balls 4 roll are formed.
The shaft 2 is fitted to a shaft main body 8, a wheel mounting flange portion 10 extending radially outward from an outer side end portion of the shaft main body 8, and an inner side end portion of the shaft main body 8. And an annular inner ring member 9. That is, the shaft 2 becomes a rotating wheel to which the wheel 11 is attached.

内輪部材９は、シャフト本体８の車両インナ側の端部を径外方向に塑性変形させて成るかしめ部８ａにより、シャフト本体８に抜け止め固定されている。シャフト２の外周面には、複列の軌道面２ｂ，２ｂが形成されており、これら軌道面２ｂ，２ｂは外輪３の軌道面３ｂ，３ｂに対向している。そして、軌道面２ｂと軌道面３ｂとの間に、複数の玉４が転動自在に配置されている。   The inner ring member 9 is fixed to the shaft main body 8 by a caulking portion 8a formed by plastically deforming an end portion on the vehicle inner side of the shaft main body 8 in the radially outward direction. Double-row raceway surfaces 2 b and 2 b are formed on the outer peripheral surface of the shaft 2, and these raceway surfaces 2 b and 2 b are opposed to the raceway surfaces 3 b and 3 b of the outer ring 3. And the some ball | bowl 4 is arrange | positioned so that rolling is possible between the track surface 2b and the track surface 3b.

以上より、複列のアンギュラ玉軸受部を有している転がり軸受装置１が構成され、この転がり軸受装置１では、シャフト２と外輪３とが同心状に配置されており、外輪３に対してシャフト２が回転可能に支持されている。このシャフト２のフランジ部１０に車輪１１が固定され、車輪１１は回転可能に支持される。   As described above, the rolling bearing device 1 having the double-row angular ball bearing portion is configured, and in this rolling bearing device 1, the shaft 2 and the outer ring 3 are arranged concentrically, with respect to the outer ring 3. The shaft 2 is rotatably supported. A wheel 11 is fixed to the flange portion 10 of the shaft 2, and the wheel 11 is rotatably supported.

フランジ部１０は、シャフト本体８のアウタ側の端部から径方向外側に向かって延びている円環板形状である。このフランジ部１０の裾部には、径方向に延び軸方向インナ側へ向く環状面１３が形成されており、本実施形態では、この環状面１３に内アール面１４が含まれている。この内アール面１４を含む環状面１３と、シャフト本体８の外周面（円周面）１５とは、滑らかに連続して形成されている。なお、外周面１５は、軸方向に延び径方向外側に向く面である。これら外周面（第１のシール面）１５と環状面（第２のシール面）１３とは、後にも説明するが、アウタ側の密封装置７のシール面１６となる。   The flange portion 10 has an annular plate shape that extends radially outward from the outer end portion of the shaft body 8. An annular surface 13 extending in the radial direction and directed toward the axial inner side is formed at the skirt of the flange portion 10. In the present embodiment, the annular surface 13 includes an inner round surface 14. The annular surface 13 including the inner round surface 14 and the outer peripheral surface (circumferential surface) 15 of the shaft body 8 are formed smoothly and continuously. The outer peripheral surface 15 is a surface that extends in the axial direction and faces radially outward. The outer peripheral surface (first seal surface) 15 and the annular surface (second seal surface) 13 serve as a seal surface 16 of the outer side sealing device 7 as will be described later.

アウタ側の密封装置７について説明する。図２は、シール面１６に接触する密封装置７の縦断面図である。この密封装置７は、外輪３に取り付けられる環状の芯金２１と、この芯金２１に固定されているとともにシャフト２に設けられたシール面１６に接触する環状のシール部材２５とを備えている。   The outer side sealing device 7 will be described. FIG. 2 is a longitudinal sectional view of the sealing device 7 in contact with the sealing surface 16. The sealing device 7 includes an annular core metal 21 attached to the outer ring 3, and an annular seal member 25 fixed to the core metal 21 and contacting a seal surface 16 provided on the shaft 2. .

芯金２１は、金属製であり、外輪３のアウタ端部における内周面３ｃに密着して嵌合されている。芯金２１は、内周面３ｃに密着している円筒部２２と、この円筒部２２のアウタ側端部から径方向内側へ折り曲げられている環状部２３とを有し、断面Ｌ字形である。
シール部材２５は、ゴム製などの弾性体からなり、芯金２１に固定されている本体部２６と、本体部２６からシール面１６へ向かって延びている第１リップ部２７及び第２リップ部２８とを備えており、本実施形態では、本体部２６からシール面１６へ向かって延びている第３リップ部２９も備えている。 The cored bar 21 is made of metal and is fitted in close contact with the inner peripheral surface 3 c at the outer end of the outer ring 3. The metal core 21 has a cylindrical portion 22 that is in close contact with the inner peripheral surface 3c, and an annular portion 23 that is bent radially inward from an outer side end portion of the cylindrical portion 22, and has an L-shaped cross section. .
The seal member 25 is made of an elastic body such as rubber, and includes a main body portion 26 fixed to the core metal 21, and a first lip portion 27 and a second lip portion extending from the main body portion 26 toward the seal surface 16. 28, and in the present embodiment, a third lip portion 29 extending from the main body portion 26 toward the sealing surface 16 is also provided.

本体部２６は、芯金２１に加硫接着されている固定部３１と、第１リップ部２７及び第２リップ部２８と固定部３１とを連結している連結部３２とを有している。連結部３２は、芯金２１によって直接的に支持されておらず、芯金２１の径方向端部２１ａからシール面１６側へ延びている部分であり、径方向端部２１ａによって片持ち状態として支持されている部分である。このため、固定部３１は、芯金２１によって変形が拘束されているが、連結部３２は、芯金２１によって変形が拘束されておらず、変形が自由である。
特に本実施形態では、連結部３２は、屈曲部３３を有しており、この屈曲部３３は、蛇腹の一部のように折り曲げられた形状であり、連結部３２におけるシール面１６に向かう方向の剛性（外周面１５及び環状面１３に向かう双方の方向の剛性）を、更に低下させている。 The main body portion 26 includes a fixing portion 31 that is vulcanized and bonded to the core metal 21, and a connecting portion 32 that connects the first lip portion 27 and the second lip portion 28 to the fixing portion 31. . The connecting portion 32 is a portion that is not directly supported by the cored bar 21 but extends from the radial end 21a of the cored bar 21 toward the seal surface 16, and is cantilevered by the radial end 21a. It is a supported part. For this reason, although the deformation | transformation of the fixing | fixed part 31 is restrained by the metal core 21, the deformation | transformation of the connection part 32 is not restrained by the metal core 21, and deformation | transformation is free.
In particular, in the present embodiment, the connecting portion 32 has a bent portion 33. The bent portion 33 has a shape bent like a part of a bellows, and is a direction toward the seal surface 16 in the connecting portion 32. (The rigidity in both directions toward the outer peripheral surface 15 and the annular surface 13) is further reduced.

第１リップ部２７は、本体部２６（連結部３２）の径方向端部２６ａからシール面１６のうちの一部である外周面１５へ向かって延びており、この外周面１５に接触しているリップ先端２７ａを有している。
第２リップ部２８は、本体部２６（連結部３２）の径方向端部２６ａからシール面１６のうちの他部である環状面１３へ向かって延びており、この環状面１３に接触しているリップ先端２８ａを有している。
第３リップ部２９は、本体部２６の径方向途中部２６ｂからシール面１６のうちの他部である環状面１３（ただし、第２リップ部２８が接触する部分と異なる領域）へ向かって延びており、この環状面１３に接触しているリップ先端２９ａを有している。 The first lip portion 27 extends from the radial end portion 26 a of the main body portion 26 (connecting portion 32) toward the outer peripheral surface 15 that is a part of the seal surface 16, and contacts the outer peripheral surface 15. A lip tip 27a.
The second lip portion 28 extends from the radial end portion 26 a of the main body portion 26 (connecting portion 32) toward the annular surface 13 that is the other portion of the seal surface 16, and contacts the annular surface 13. A lip tip 28a.
The third lip portion 29 extends from the intermediate portion 26b in the radial direction of the main body portion 26 toward the annular surface 13 which is the other portion of the seal surface 16 (however, a region different from the portion where the second lip portion 28 contacts). And has a lip tip 29 a in contact with the annular surface 13.

第１リップ部２７は、玉４が存在している軸受部１８に最も近いシールであり、主に軸受部１８の潤滑剤が外部へ漏れるのを防止している。第２リップ部２８は、第１リップ部２７の隣りのシールであり、前記潤滑剤が外部へ漏れるのを防止しているとともに、外部からの異物の侵入も防止している。第３リップ部２９は、第２リップ部２８の隣りのシールであり、主に外部からの異物の侵入を防止している。   The first lip portion 27 is a seal closest to the bearing portion 18 where the balls 4 are present, and mainly prevents the lubricant in the bearing portion 18 from leaking to the outside. The second lip portion 28 is a seal adjacent to the first lip portion 27, and prevents the lubricant from leaking to the outside and prevents foreign matter from entering from the outside. The third lip portion 29 is a seal adjacent to the second lip portion 28 and mainly prevents foreign matter from entering from the outside.

以上の構成により、第１リップ部２７及び第２リップ部２８と、シール面１６との間には密閉された環状の第１の空間Ｊが形成され、第２リップ部２８及び第３リップ部２９と、シール面１６との間には密閉された環状の第２の空間Ｋが形成されている。
本実施形態では、第１リップ部２７及び第２リップ部２８は、本体部２６（連結部３２）の径方向端部２６ａから互いに、直線的に反対方向に向かって延びて形成されている。 With the above configuration, a sealed annular first space J is formed between the first lip portion 27 and the second lip portion 28 and the seal surface 16, and the second lip portion 28 and the third lip portion are formed. A sealed annular second space K is formed between 29 and the sealing surface 16.
In the present embodiment, the first lip portion 27 and the second lip portion 28 are formed so as to extend linearly in opposite directions from the radial end portion 26a of the main body portion 26 (connecting portion 32).

そして、第１リップ部２７及び第２リップ部２８に、補強部材３０が設けられている。補強部材３０は、本体部２６（連結部３２）の径方向端部２６ａを挟んでその両側に向かって延びており、リップ先端２７ａ，２８ａを除いて、少なくとも第１リップ部２７の基部２７ｂから第２リップ部２８の基部２８ｂにわたって設けられている。
本実施形態では、第１リップ部２７のうちの、リップ先端２７ａと基部２７ｂとの間の中間領域から、第２リップ部２８のうちの、リップ先端２８ａと基部２８ｂとの間の中間領域までの間にわたって、補強部材３０が設けられている。 A reinforcing member 30 is provided on the first lip portion 27 and the second lip portion 28. The reinforcing member 30 extends toward both sides of the radial end portion 26a of the main body portion 26 (connecting portion 32), and at least from the base portion 27b of the first lip portion 27 except for the lip tips 27a and 28a. The second lip portion 28 is provided over the base portion 28 b.
In the present embodiment, from the intermediate region between the lip tip 27a and the base portion 27b of the first lip portion 27 to the intermediate region between the lip tip 28a and the base portion 28b of the second lip portion 28. A reinforcing member 30 is provided between the two.

補強部材３０は、シール部材２５及び芯金２１とは別の部材である。補強部材３０は、シール部材２５に埋められた状態にあり、特に本実施形態では、その内周面３０ａがシール面１６側へ露出した状態として、第１リップ部２７及び第２リップ部２８に埋められている。そして、補強部材の内周面３０ａは、第１リップ部２７の内周面２７ｃ及び第２リップ部２８の内周面２８ｃと共に、一つの平滑な面を形成している。   The reinforcing member 30 is a member different from the seal member 25 and the cored bar 21. The reinforcing member 30 is embedded in the seal member 25. In particular, in this embodiment, the inner peripheral surface 30a is exposed to the seal surface 16 side, and the first lip portion 27 and the second lip portion 28 are exposed. Buried. The inner peripheral surface 30 a of the reinforcing member forms one smooth surface together with the inner peripheral surface 27 c of the first lip portion 27 and the inner peripheral surface 28 c of the second lip portion 28.

補強部材３０は、金属製であり、同一の断面（本実施形態で細長の矩形断面）を有する環状の部材である。つまり、補強部材３０は、シール部材２５内に全周にわたって設けられている。なお、補強部材３０の材質は、金属製以外に、樹脂製又はシール部材２５とは別のゴム製であってもよいが、補強部材３０は、第１及び第２リップ部２７，２８よりも硬い材質（剛性の高い部材）からなり、リップ部２７，２８の剛性を高める部材である。なお、本体部２６、及び、第１〜第３リップ部２７，２８，２９は、同じ材質からなる。
本実施形態では、補強部材３０は、縦断面が直線形状であり、本体部２６（連結部３２）の径方向端部２６ａから第１及び第２リップ部２７，２８がそれぞれ延伸する方向に沿ったテーパ筒形状を有している。 The reinforcing member 30 is made of metal and is an annular member having the same cross section (in the present embodiment, an elongated rectangular cross section). That is, the reinforcing member 30 is provided over the entire circumference in the seal member 25. The material of the reinforcing member 30 may be a resin or a rubber other than the sealing member 25 other than metal, but the reinforcing member 30 is more than the first and second lip portions 27 and 28. The member is made of a hard material (a member having high rigidity) and increases the rigidity of the lip portions 27 and 28. In addition, the main-body part 26 and the 1st-3rd lip parts 27, 28, and 29 consist of the same material.
In the present embodiment, the reinforcing member 30 has a linear cross section in the longitudinal direction, and extends along the direction in which the first and second lip portions 27 and 28 extend from the radial end portion 26a of the main body portion 26 (connecting portion 32). It has a tapered cylindrical shape.

この補強部材３０は、第１リップ部２７及び第２リップ部２８を内周側の部分において支持しており、第１及び第２リップ部２７，２８がシール面１６側へ曲がり変形するのを抑制する機能を有している。つまり、第１リップ部２７がその基部２７ｂを起点としてシール面１６側へ弾性変形するのを抑制しており、また、第２リップ部２８がその基部２８ｂを起点としてシール面１６側へ弾性変形するのを抑制している。補強部材３０は、第１リップ部２７の基部２７ｂと、第２リップ部２８の基部２８ｂとの相対角度が変化するのを抑制しており、第１及び第２リップ部２７，２８の姿勢を維持している。   The reinforcing member 30 supports the first lip portion 27 and the second lip portion 28 on the inner peripheral side, and the first and second lip portions 27 and 28 are bent and deformed toward the seal surface 16 side. It has a function to suppress. That is, the first lip portion 27 is prevented from elastically deforming toward the sealing surface 16 side from the base portion 27b, and the second lip portion 28 is elastically deformed toward the sealing surface 16 side from the base portion 28b. It is restrained to do. The reinforcing member 30 suppresses a change in the relative angle between the base portion 27b of the first lip portion 27 and the base portion 28b of the second lip portion 28, and the posture of the first and second lip portions 27 and 28 is changed. Is maintained.

以上の本実施形態に係る転がり軸受１によれば、シャフト２の回転に伴って、複数の玉４を有する軸受部１８及びこの軸受部１８に近接して設けられている密封装置７の温度が上昇する。すると、この密封装置７において、第１リップ部２７及び第２リップ部２８とシール面１６との間に形成されている密閉された空間Ｊは、高温となる軸受部１８に特に近いことから、この空間Ｊの温度が上昇し、その内圧が上昇する。そして、この空間Ｊの内圧が上昇し、所定の内圧に達すると、空間Ｊの空気が外部へ漏れ、その後、シャフト２の回転数が低下し又は回転が停止すると、密封装置７及び空間Ｊの温度が降下する。   According to the rolling bearing 1 according to the above-described embodiment, as the shaft 2 rotates, the temperature of the bearing portion 18 having the plurality of balls 4 and the sealing device 7 provided close to the bearing portion 18 is increased. To rise. Then, in this sealing device 7, the sealed space J formed between the first lip portion 27 and the second lip portion 28 and the seal surface 16 is particularly close to the bearing portion 18 that becomes high temperature. The temperature of this space J rises and its internal pressure rises. When the internal pressure of the space J rises and reaches a predetermined internal pressure, the air in the space J leaks to the outside, and when the rotational speed of the shaft 2 decreases or stops rotating, the sealing device 7 and the space J The temperature drops.

この場合、空間Ｊの内圧が低下し（負圧になり）、第１リップ部２７及び第２リップ部２８それぞれが、基部２７ｂ，２８ｂを起点としてシール面１６側へ弾性変形しようとするが、上記のとおり、補強部材３０によってこの弾性変形が抑制されていることから、従来のように、第１リップ部２７及び第２リップ部２８それぞれのシール面１６に対する接触面圧が過度に高くなるのを防ぐことができる。
また、上記のとおり、補強部材３０によって、第１及び第２リップ部２７，２８の姿勢が維持されることから、空間Ｊの体積が大きく変化するのを抑えることができ、空間Ｊの内圧の低下を抑制することが可能となる。 In this case, the internal pressure of the space J decreases (becomes negative pressure), and the first lip portion 27 and the second lip portion 28 try to elastically deform toward the seal surface 16 side from the base portions 27b and 28b. As described above, since the elastic deformation is suppressed by the reinforcing member 30, the contact surface pressures of the first lip portion 27 and the second lip portion 28 with respect to the seal surface 16 are excessively increased as in the related art. Can be prevented.
Further, as described above, since the postures of the first and second lip portions 27 and 28 are maintained by the reinforcing member 30, it is possible to suppress the volume J of the space J from greatly changing, and the internal pressure of the space J can be suppressed. It is possible to suppress the decrease.

この結果、接触面圧が高くなることによって、第１及び第２リップ部２７，２８の摩耗が促進されるのを防止することが可能であり、密封装置７の寿命が長くなるとともに、シャフト２の回転抵抗が大きくなるのを防止することが可能となる。なお、シャフト２の回転抵抗が小さくなれば、車輪の転がり抵抗が小さくなり、消費燃料を低減することへと繋がる。   As a result, it is possible to prevent the wear of the first and second lip portions 27 and 28 from being accelerated by increasing the contact surface pressure, and the life of the sealing device 7 is increased, and the shaft 2 It is possible to prevent the rotation resistance of the sheet from increasing. If the rotational resistance of the shaft 2 is reduced, the rolling resistance of the wheel is reduced, leading to a reduction in fuel consumption.

また、本実施形態では、シール部材２５の連結部３２は、上記のとおり、シール面１６に向かう方向の剛性を低下させる屈曲部３３を有している。この屈曲部３３を有していることによって、シール部材２５の芯金２１に接着されている固定部３１からシール面１６へ向かう方向に沿って連結部３２を直線状に形成する場合に比べて、連結部３２におけるシール面１６に向かう方向の剛性は低下する。上記のとおり、第１リップ部２７の基部２７ｂから第２リップ部２８の基部２８ｂにわたる部分は、補強部材３０によって剛性が高くなり、第１及び第２リップ部２７，２８それぞれのシール面１６に対する追従性が低下するが、屈曲部３３によって連結部３２が柔軟となる。   Moreover, in this embodiment, the connection part 32 of the sealing member 25 has the bending part 33 which reduces the rigidity of the direction which goes to the sealing surface 16, as mentioned above. Compared with the case where the connecting portion 32 is formed linearly along the direction from the fixing portion 31 bonded to the core metal 21 of the sealing member 25 to the sealing surface 16 by having the bent portion 33. The rigidity of the connecting portion 32 in the direction toward the seal surface 16 is reduced. As described above, the portion extending from the base portion 27 b of the first lip portion 27 to the base portion 28 b of the second lip portion 28 is increased in rigidity by the reinforcing member 30, and the first and second lip portions 27, 28 are respectively sealed with respect to the sealing surface 16. Although the followability is lowered, the bent portion 33 makes the connecting portion 32 flexible.

このため、この連結部３２と繋がる第１及び第２リップ部２７，２８は全体として、シール面１６に沿って追従しやすくなり、リップ部２７，２８の浮き上がりを防ぐことができ、密封性が高まる。つまり、密封装置７に対してシール面１６が偏心していても、第１及び第２リップ部２７，２８は全体として、偏心しているシール面１６に追従することが可能となり、密封性が高まる。
また、この屈曲部３３によれば、例えば、第１及び第２リップ部２７，２８が全体として第３リップ部２９側へ接近するような変形が発生しても、屈曲部３３の復元力によって、元の姿勢（図２の状態）へと戻すことが可能となる。 Therefore, the first and second lip portions 27 and 28 connected to the connecting portion 32 can easily follow along the seal surface 16 as a whole, and the lip portions 27 and 28 can be prevented from being lifted, and the sealing performance is improved. Rise. That is, even if the sealing surface 16 is eccentric with respect to the sealing device 7, the first and second lip portions 27 and 28 can follow the eccentric sealing surface 16 as a whole, and the sealing performance is improved.
Further, according to the bent portion 33, for example, even if the first and second lip portions 27, 28 are deformed so as to approach the third lip portion 29 as a whole, the restoring force of the bent portion 33 causes It is possible to return to the original posture (state shown in FIG. 2).

また、本発明の密封装置、及び、この密封装置を備えた転がり軸受装置は、図示する形態に限らず本発明の範囲内において他の形態のものであってもよい。例えば、上記実施形態では、芯金２１が固定輪となる外輪３に取り付けられ、シール部材２５の各リップ部が、回転輪となるシャフト２に摺接する場合を説明したが、これとは反対に、外輪３が回転してもよく、また、図示しないが、芯金をシャフト２に取り付け、シール部材の各リップ部が外輪のシール面に摺接する構成であってもよい。つまり、芯金は、固定輪と回転輪との内の一方に取り付けられ、この芯金に固定されているシール部材は、固定輪と回転輪との内の他方のシール面に接触する構成であればよい。   Further, the sealing device of the present invention and the rolling bearing device provided with the sealing device are not limited to the illustrated form, and may be in other forms within the scope of the present invention. For example, in the above-described embodiment, the case where the core metal 21 is attached to the outer ring 3 serving as a fixed wheel and each lip portion of the seal member 25 is in sliding contact with the shaft 2 serving as a rotating wheel is described. The outer ring 3 may be rotated, and although not shown, a metal core may be attached to the shaft 2 so that each lip portion of the seal member is in sliding contact with the seal surface of the outer ring. That is, the cored bar is attached to one of the fixed ring and the rotating ring, and the seal member fixed to the cored bar is in contact with the other sealing surface of the fixed ring and the rotating ring. I just need it.

また、前記実施形態の密封装置は、車輪用軸受装置のアウタ側に設けられ、シール部材２５が接触するシール面１６が、外周面１５と環状面１３とからなる場合を説明したが、これ以外であってもよい。例えば、図示しないが、第１リップ部が接触する第１のシール面、及び、第２リップ部が接触する第２のシール面が、共に固定輪又は回転輪の円周面（外周面）からなる構成であってもよい。つまり、第１リップ部と第２リップ部とが、共通する円周面の一部と他部とにそれぞれ接触する密封装置であってもよい。なお、この場合、特に第３のリップ部２９が省略されていてもよい。
また、補強部材３０は、リップ先端２７ａ，２８ａを除いて、少なくとも第１リップ部２７の基部２７ｂから第２リップ部２８の基部２８ｂにわたって設けられていればよく、その長さは、シール部材２５独自の硬さなどに応じて変更可能である。 Moreover, although the sealing device of the said embodiment was provided in the outer side of the wheel bearing apparatus and the seal surface 16 which the seal member 25 contacts comprised the outer peripheral surface 15 and the cyclic | annular surface 13, it demonstrated other than this. It may be. For example, although not shown, the first seal surface that is in contact with the first lip portion and the second seal surface that is in contact with the second lip portion are both from the circumferential surface (outer circumferential surface) of the fixed ring or the rotating ring. The structure which becomes may be sufficient. That is, the sealing device may be such that the first lip portion and the second lip portion are in contact with a part of the common circumferential surface and the other portion. In this case, the third lip portion 29 may be omitted.
Further, the reinforcing member 30 may be provided from at least the base portion 27b of the first lip portion 27 to the base portion 28b of the second lip portion 28 except for the lip tips 27a and 28a. It can be changed according to its own hardness.

１：転がり軸受装置 ２：シャフト（回転輪） ３：外輪（固定輪） ４：玉（転動体） ７：密封装置（アウタ側） １３：環状面 １５：外周面（円周面） １６：シール面 ２１：芯金 ２５：シール部材 ２６：本体部 ２６ａ：径方向端部（先端部） ２７：第１リップ部 ２８：第２リップ部 ３０：補強部材 ３１：固定部 ３２：連結部 ３３：屈曲部 Ｈ：環状空間   1: Rolling bearing device 2: Shaft (rotating wheel) 3: Outer ring (fixed wheel) 4: Ball (rolling element) 7: Sealing device (outer side) 13: Annular surface 15: Outer surface (circumferential surface) 16: Seal Surface 21: Metal core 25: Seal member 26: Main body portion 26a: Radial end portion (tip portion) 27: First lip portion 28: Second lip portion 30: Reinforcing member 31: Fixing portion 32: Connecting portion 33: Bending Part H: Annular space

Claims (4)

同心状に配置される固定輪と回転輪との間に形成される空間に設けられる密封装置であって、
前記固定輪と前記回転輪との内の一方に取り付けられる環状の芯金と、前記芯金に固定されているとともに前記固定輪と前記回転輪との内の他方に設けられた第１及び第２のシール面に接触する環状のシール部材と、を備え、
前記シール部材は、前記芯金に固定されている本体部と、前記本体部の先端部から前記第１のシール面へ向かって延び当該第１のシール面に接触する第１リップ部と、前記本体部の前記先端部から前記第２のシール面へ向かって延び当該第２のシール面に接触する第２リップ部と、前記第１リップ部の基部から前記第２リップ部の基部にわたって設けられ、当該第１リップ部と当該第２リップ部との間に形成される空間が負圧となった場合に、当該第１及び第２リップ部が前記第１及び第２のシール面に吸着するのを抑制する補強部材と、を有していることを特徴とする密封装置。 A sealing device provided in a space formed between a fixed wheel and a rotating wheel arranged concentrically,
An annular cored bar attached to one of the fixed ring and the rotating ring, and first and first fixed to the cored bar and provided on the other of the fixed ring and the rotating ring An annular sealing member that contacts the two sealing surfaces;
The seal member includes a main body portion fixed to the cored bar, a first lip portion that extends from a distal end portion of the main body portion toward the first seal surface, and contacts the first seal surface; A second lip portion extending from the distal end portion of the main body portion toward the second seal surface and contacting the second seal surface; and a base portion of the first lip portion to a base portion of the second lip portion. When the space formed between the first lip portion and the second lip portion becomes negative pressure, the first and second lip portions are attracted to the first and second sealing surfaces. And a reinforcing member for suppressing the above. 前記本体部は、前記芯金に接着されている固定部と、前記第１及び第２リップ部と当該固定部とを連結している連結部と、を有し、
前記連結部は、当該連結部における前記第１及び第２のシール面に向かう双方の方向の剛性を低下させる屈曲部を有している請求項１に記載の密封装置。 The main body has a fixing part bonded to the cored bar, and a connecting part that connects the first and second lip parts and the fixing part.
The sealing device according to claim 1, wherein the connecting portion has a bent portion that reduces rigidity in both directions toward the first and second sealing surfaces in the connecting portion. 前記第１のシール面は、軸方向に延びる円周面であり、前記第２のシール面は、前記円周面から連続して形成されている径方向に延びる環状面であり、
前記円周面に接触する前記第１リップ部及び前記環状面に接触する前記第２リップ部は、前記本体部の前記先端部から互いに反対方向に向かって直線的に延びて形成され、
前記補強部材は、前記第１及び第２リップ部がそれぞれ延伸する方向に沿ったテーパ筒形状を有している請求項１又は２に記載の密封装置。 The first seal surface is a circumferential surface extending in the axial direction, and the second seal surface is a radially extending annular surface formed continuously from the circumferential surface,
The first lip portion that contacts the circumferential surface and the second lip portion that contacts the annular surface are formed by linearly extending in opposite directions from the tip portion of the main body portion,
The sealing device according to claim 1, wherein the reinforcing member has a tapered cylindrical shape along a direction in which the first and second lip portions extend. 固定輪と、この固定輪と同心状に配置されている回転輪と、前記固定輪と前記回転輪との間に設けられている複数の転動体と、前記固定輪と前記回転輪との間に形成される空間に設けられている密封装置と、を備え、
前記密封装置は、前記固定輪と前記回転輪との内の一方に取り付けられている環状の芯金と、前記芯金に固定されているとともに前記固定輪と前記回転輪との内の他方に設けられた第１及び第２のシール面に接触する環状のシール部材と、を備え、
前記シール部材は、前記芯金に固定されている本体部と、前記本体部の先端部から前記第１のシール面へ向かって延び当該第１のシール面に接触する第１リップ部と、前記本体部の前記先端部から前記第２のシール面へ向かって延び当該第２のシール面に接触する第２リップ部と、前記第１リップ部の基部から前記第２リップ部の基部にわたって設けられ、当該第１リップ部と当該第２リップ部との間に形成される空間が負圧となった場合に、当該第１及び第２リップ部が前記第１及び第２のシール面に吸着するのを抑制する補強部材と、を有していることを特徴とする転がり軸受装置。 A fixed wheel, a rotating wheel arranged concentrically with the fixed wheel, a plurality of rolling elements provided between the fixed wheel and the rotating wheel, and between the fixed wheel and the rotating wheel A sealing device provided in a space formed in
The sealing device includes an annular cored bar attached to one of the fixed ring and the rotating ring, and is fixed to the cored bar and is fixed to the other of the fixed ring and the rotating ring. An annular seal member in contact with the provided first and second sealing surfaces;
The seal member includes a main body portion fixed to the cored bar, a first lip portion that extends from a distal end portion of the main body portion toward the first seal surface, and contacts the first seal surface; A second lip portion extending from the distal end portion of the main body portion toward the second seal surface and contacting the second seal surface; and a base portion of the first lip portion to a base portion of the second lip portion. When the space formed between the first lip portion and the second lip portion becomes negative pressure, the first and second lip portions are attracted to the first and second sealing surfaces. A rolling bearing device comprising: a reinforcing member that suppresses the deformation.
JP2011198332A 2011-09-12 2011-09-12 Sealing device and roller bearing device Withdrawn JP2013060975A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015021590A (en) * 2013-07-22 2015-02-02 日本精工株式会社 Seal device for rolling bearing and rolling bearing
JP2019078345A (en) * 2017-10-25 2019-05-23 Nok株式会社 Sealing device
CN111503161A (en) * 2016-03-07 2020-08-07 日本精工株式会社 Rolling bearing, bearing unit for air turbine, and dental air turbine handpiece

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015021590A (en) * 2013-07-22 2015-02-02 日本精工株式会社 Seal device for rolling bearing and rolling bearing
CN111503161A (en) * 2016-03-07 2020-08-07 日本精工株式会社 Rolling bearing, bearing unit for air turbine, and dental air turbine handpiece
JP2019078345A (en) * 2017-10-25 2019-05-23 Nok株式会社 Sealing device

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