JP2009127668A - Hermetically sealing device - Google Patents

Hermetically sealing device Download PDF

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Publication number
JP2009127668A
JP2009127668A JP2007300501A JP2007300501A JP2009127668A JP 2009127668 A JP2009127668 A JP 2009127668A JP 2007300501 A JP2007300501 A JP 2007300501A JP 2007300501 A JP2007300501 A JP 2007300501A JP 2009127668 A JP2009127668 A JP 2009127668A
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Japan
Prior art keywords
slinger
sealing device
seal
fitted
cylindrical
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JP2007300501A
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Japanese (ja)
Inventor
Shunichi Fujiwara
俊一 藤原
Hirohiko Sumiyama
博彦 角山
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Koyo Sealing Techno Co Ltd
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Koyo Sealing Techno Co Ltd
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Priority to JP2007300501A priority Critical patent/JP2009127668A/en
Publication of JP2009127668A publication Critical patent/JP2009127668A/en
Pending legal-status Critical Current

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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
    • F16C33/7879—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
    • F16C33/7883—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 mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—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
    • 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
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetically sealing device capable of preventing intrusion of muddy water from the outside by improving sealability. <P>SOLUTION: The hermetically sealing device 1 includes a seal body 3 attached in an annular space configured between an inside member and an outside member 21 and fitted and fixed inside the outside member 21, a cylinder part 2a fitted on the outside of an inner ring configuring member 26 configuring the inside member, and a slinger 2 having an L-shaped cross section with a side plate part 2c extending in the radially outward direction via a corner part 2b from an end of an atmosphere A side of the cylinder part 2a. An annular seal part 10 for sealing between the cylinder part 2a of the slinger 2 and the inner ring configuring member 26 is provided along the corner part 2b of the slinger 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、互いに相対回転する外側部材と内側部材との間の環状空間を密封するための密封装置に関する。   The present invention relates to a sealing device for sealing an annular space between an outer member and an inner member that rotate relative to each other.

従来、この種の密封装置として、金属製の芯金に弾性体からなるシール材が被着されたシール本体と、スリンガーとを備えたものが知られている。この密封装置は、固定側部材である外側部材に芯金が嵌合されるとともに、シール材の内周に形成されたシールリップが回転側部材である内側部材に外嵌させたスリンガーに常時摺接する構造とされている（特許文献１参照）。
ところが、外側部材と金属製の芯金との熱膨張率が大きく異なる場合には、温度の上昇に伴って外側部材と芯金との嵌合部に隙間が生じる可能性があった。
そこで、外側部材と芯金との嵌合部に隙間が生じたとしても、その隙間から流体が漏れないようにした密封装置が提案されている（特許文献２参照）。
この特許文献２に記載されている密封装置では、金属環（芯金）の有する弾性部材（シール材）がハウジング（外側部材）の開口部の端縁をシールすることによって、ハウジングと密封装置との間で流体の漏れを防止できるものである。 2. Description of the Related Art Conventionally, as this type of sealing device, a device provided with a seal body in which a sealing material made of an elastic body is attached to a metal core and a slinger is known. In this sealing device, a metal core is fitted to an outer member that is a stationary member, and a seal lip formed on the inner periphery of the sealing material is always slid onto a slinger that is fitted to an inner member that is a rotating member. It is set as the structure which touches (refer patent document 1).
However, when the thermal expansion coefficients of the outer member and the metal core are greatly different, there is a possibility that a gap is generated in the fitting portion between the outer member and the core as temperature increases.
Therefore, even if a gap occurs in the fitting portion between the outer member and the metal core, a sealing device has been proposed in which fluid does not leak from the gap (see Patent Document 2).
In the sealing device described in Patent Document 2, the elastic member (sealing material) of the metal ring (core metal) seals the edge of the opening of the housing (outer member), whereby the housing and the sealing device It is possible to prevent fluid leakage between the two.

特開平１１−３０４８２７号公報JP-A-11-304827 特開２００４−１９８６５号公報JP 2004-18865 A

特許文献１記載のものを含む従来の密封装置は、ステンレス（あるいはメッキ鋼板）製のスリンガーを金属製の回転側部材に嵌合させているため、当該嵌合部におけるそれぞれの面の状態、又は、当該嵌合の締め代の大きさによっては、泥水雰囲気の厳しい環境下では、当該嵌合面から外部の泥水等が浸入するという問題を有していた。
また、スリンガー又は回転側部材の腐食により、当該嵌合部に隙間が生じてしまい、この隙間から外部の泥水等が浸入することもあった。
このため、例えば、従来の密封装置を装着するハブベアリング等では、泥水等の浸入により摩耗が発生し易くなり、寿命低下の原因となっていた。
本発明はこのような問題点に鑑みてなされたものであり、密封性を高めて、外部からの泥水等の浸入を防止することができる密封装置を提供することを目的としている。 Since the conventional sealing device including the one described in Patent Document 1 has a stainless (or plated steel plate) slinger fitted to a metal rotating side member, the state of each surface in the fitting portion, or Depending on the size of the fitting allowance, there is a problem that external muddy water or the like enters from the fitting surface under a severe muddy water environment.
Further, due to the corrosion of the slinger or the rotation side member, a gap is generated in the fitting portion, and external muddy water or the like may enter from the gap.
For this reason, for example, in a hub bearing or the like to which a conventional sealing device is attached, wear is likely to occur due to intrusion of muddy water or the like, causing a reduction in life.
This invention is made | formed in view of such a problem, and it aims at providing the sealing device which can improve sealing property and can prevent the invasion of the muddy water etc. from the outside.

本発明の密封装置は、同芯にて互いに相対回転可能に配置された内側部材と外側部材との間に構成される環状空間に装着され、前記内側部材及び外側部材のうちの一方の部材に嵌合されるシール本体と、前記内側部材及び外側部材のうちの他方の部材に嵌合される円筒部と、この円筒部の一端部からコーナ部を介して径方向に延びる環状の側板部とを有する断面Ｌ字状のスリンガーと、を備える密封装置において、前記スリンガーの円筒部と前記他方の部材との間を密封する環状のシール部が、前記スリンガーのコーナ部に沿って設けられていることを特徴としている。   The sealing device of the present invention is mounted in an annular space formed between an inner member and an outer member that are concentrically arranged to be relatively rotatable with each other, and is attached to one of the inner member and the outer member. A seal body to be fitted, a cylindrical portion fitted to the other member of the inner member and the outer member, and an annular side plate portion extending in a radial direction from one end portion of the cylindrical portion via a corner portion; A slinger having an L-shaped cross section having an annular seal portion that seals between the cylindrical portion of the slinger and the other member along the corner portion of the slinger. It is characterized by that.

この構成によれば、シール部によりスリンガーと他方の部材との間の密封性を高めることができるので、スリンガーと他方の部材との間から外部の泥水等が浸入することがない。したがって、泥水雰囲気の厳しい環境下においても、外部からの泥水等の浸入を防止することができる。   According to this configuration, the sealing portion can improve the sealing performance between the slinger and the other member, so that no external muddy water or the like enters from between the slinger and the other member. Accordingly, it is possible to prevent intrusion of muddy water and the like from the outside even in a severe environment with a muddy water atmosphere.

前記密封装置において、前記シール部が、前記コーナ部から前記円筒部の他端側に向かって延びて、当該コーナ部と他方の部材との間に形成される断面楔状の環状空間を密封する円筒体を有するのが好ましい。
この場合、断面楔状の環状空間に対しコーナ部側から円筒部の他端側に向かってシール部の円筒体を追い込むことにより、シール部がスリンガー及び他方の部材に圧接され、シール部とスリンガー及び他方の部材との密着度が高まる。
これによって、スリンガーと他方の部材との間の密封性をより高めることができ、外部からの泥水等の浸入をより効果的に防止することができる。 In the sealing device, the sealing portion extends from the corner portion toward the other end side of the cylindrical portion, and seals a circular wedge-shaped annular space formed between the corner portion and the other member. It is preferable to have a body.
In this case, the seal portion is pressed against the slinger and the other member by driving the cylindrical body of the seal portion from the corner portion side toward the other end side of the cylindrical portion with respect to the annular space having a wedge-shaped cross section, and the seal portion and the slinger and The degree of adhesion with the other member increases.
Thereby, the sealing performance between the slinger and the other member can be further improved, and intrusion of muddy water or the like from the outside can be more effectively prevented.

本発明の密封装置によれば、密封性を高めて、外部からの泥水等の浸入を防止することができる。   According to the sealing device of the present invention, it is possible to improve sealing performance and prevent intrusion of muddy water and the like from the outside.

以下、本発明の好ましい実施の形態について添付図面を参照しながら説明する。
なお、以下の説明では、本発明の密封装置を駆動輪用軸受装置（以下、単に「軸受装置」ともいう）に適用した場合を例示して説明する。
図１は、本発明の一実施の形態に係る密封装置を備えた軸受装置を示す軸方向断面図であり、図２は、図１に示される密封装置の拡大断面図である。
図１に示される軸受装置２０は、自動車などの車両の駆動輪を回転自在に支持するのに用いられ、外輪を構成する外側部材２１と、内輪を構成する内側部材２２と、前記外側部材２１と内側部材２２との間に配設される、転動体であるボール２３とを備えており、前記内側部材２２は、アクスル２４に対してスプライン結合されるハブないしはハブホイール２５と、このハブ２５の外周面に固定される２分割の内輪構成部材２６とで構成されている。ハブ２５は、アクスル２４の雄ねじ端部にアクスルナット２８を螺合することにより固定されており、また、外側部材２１の外周面はナックル（アクスルハウジング）３０の内周面に固定されている。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
In the following description, a case where the sealing device of the present invention is applied to a drive wheel bearing device (hereinafter also simply referred to as “bearing device”) will be described as an example.
FIG. 1 is an axial sectional view showing a bearing device including a sealing device according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the sealing device shown in FIG.
A bearing device 20 shown in FIG. 1 is used to rotatably support a drive wheel of a vehicle such as an automobile, and includes an outer member 21 constituting an outer ring, an inner member 22 constituting an inner ring, and the outer member 21. The inner member 22 includes a hub or a hub wheel 25 splined to the axle 24 and a hub 25. The inner ring constituting member 26 is divided into two parts that are fixed to the outer peripheral surface of the inner ring. The hub 25 is fixed by screwing an axle nut 28 to the male screw end portion of the axle 24, and the outer peripheral surface of the outer member 21 is fixed to the inner peripheral surface of a knuckle (axle housing) 30.

前記外側部材２１は、内周に複列の断面円弧状の軌道面２１ａを有しており、また、前記２分割の内輪構成部材２６は、これら軌道面２１ａに対向する断面円弧状の軌道面２６ａを、それぞれの外周に有している。そして、前記複列の軌道面２１ａ、２６ａ間に複数のボール２３が介在している。複数のボール２３は、保持器２７により、周方向において所定間隔で保持されている。また、外側部材２１と、内側部材２２を構成する内輪構成部材２６との間の環状空間の両端は、後述する密封装置１により密封されている。なお、図１において、２９は、ハブ２５のフランジ部２５ａに圧入されたハブボルトであり、このハブボルト２９に図示しないホイールやブレーキのロータなどの車輪側部材が取り付けられる。   The outer member 21 has a double-row arc-shaped raceway surface 21a on the inner periphery, and the two-part inner ring component 26 has a cross-section arc-shaped raceway surface facing these raceway surfaces 21a. 26a is provided on each outer periphery. A plurality of balls 23 are interposed between the double-row track surfaces 21a and 26a. The plurality of balls 23 are held at predetermined intervals by the cage 27 in the circumferential direction. Further, both ends of the annular space between the outer member 21 and the inner ring constituting member 26 constituting the inner member 22 are sealed by a sealing device 1 described later. In FIG. 1, reference numeral 29 denotes a hub bolt press-fitted into the flange portion 25 a of the hub 25, and a wheel side member such as a wheel or a brake rotor (not shown) is attached to the hub bolt 29.

次に、密封装置１について詳細に説明する。
密封装置１は、軸受内部の潤滑剤が大気Ａ側（図１〜２参照）へ漏れるのを防止し、また、泥水等が軸受内部へ浸入するのを防止するものであり、内側部材２２を構成する内輪構成部材２６に外嵌固定されるスリンガー２と、外側部材２１に内嵌固定されるシール本体３と、スリンガー２と内輪構成部材２６との間を密封するためのシール部１０とを備えている。 Next, the sealing device 1 will be described in detail.
The sealing device 1 prevents the lubricant inside the bearing from leaking to the atmosphere A side (see FIGS. 1 and 2) and prevents muddy water and the like from entering the inside of the bearing. The slinger 2 that is externally fitted and fixed to the inner ring constituent member 26, the seal body 3 that is internally fitted and fixed to the outer member 21, and the seal portion 10 for sealing between the slinger 2 and the inner ring constituent member 26. I have.

スリンガー２は、ステンレスなどの金属板で作製されており、内輪構成部材２６に外嵌される円筒部２ａと、この円筒部２ａの大気Ａ側の端部からコーナ部２ｂを介して径外方向に延びる側板部２ｃとを有する断面Ｌ字状の環状部材である。
円筒部２ａと側板部２ｃとの間に位置するコーナ部２ｂは、断面円弧状を呈しており、軸方向において軸受内部側から大気Ａ側に向かって漸次拡径された面２ｂ１を有している。これにより、コーナ部２ｂと内輪構成部材２６との間に大気Ａ側に開口する断面楔状の環状空間が形成される。 The slinger 2 is made of a metal plate such as stainless steel. The cylindrical portion 2a is externally fitted to the inner ring constituent member 26, and the radially outward direction from the end of the cylindrical portion 2a on the atmosphere A side through the corner portion 2b. This is an annular member having an L-shaped cross section having a side plate portion 2c extending in a straight line.
The corner portion 2b located between the cylindrical portion 2a and the side plate portion 2c has a circular arc shape in cross section, and has a surface 2b1 that is gradually expanded from the bearing inner side toward the atmosphere A side in the axial direction. Yes. Thus, an annular space having a wedge-shaped cross section that opens to the atmosphere A side is formed between the corner portion 2b and the inner ring constituent member 26.

シール本体３は、スリンガー２と同じく金属板で作製され芯金となる金属環４と、この金属環４に被着されたゴム状の弾性体からなるシール部材５とから構成され、このシール部材５に、後述する、メインリップ６、サブリップ７及びサイドリップ８が一体成形されている。シール部材５は、加硫による接着、焼付けなどにより金属環４に固定される。
金属環４は、外側部材２１に内嵌される円筒部４ａと、この円筒部４ａの軸受内部側の端部から径内方向に連続して形成された側板部４ｂとを有する断面Ｌ字状の環状部材である。 The seal body 3 is composed of a metal ring 4 made of a metal plate, which is the same as the slinger 2 and serving as a core metal, and a seal member 5 made of a rubber-like elastic body attached to the metal ring 4, and this seal member 5, a main lip 6, a sub lip 7 and a side lip 8, which will be described later, are integrally formed. The seal member 5 is fixed to the metal ring 4 by adhesion or baking by vulcanization.
The metal ring 4 has an L-shaped cross section having a cylindrical portion 4a fitted in the outer member 21 and a side plate portion 4b formed continuously in the radial inward direction from an end portion on the bearing inner side of the cylindrical portion 4a. This is an annular member.

シール部材５は、円筒部４ａの大気Ａ側の端部の外周側を覆い外側部材２１に内嵌される外周部５ａと、円筒部４ａの内周側及び側板部４ｂの大気Ａ側を覆う中間部５ｂと、側板部４ｂの内周側の領域を覆う内周部５ｃとを有している。内周部５ｃの一部は、側板部４ｂの軸受内部側表面を覆っている。
内周部５ｃの内方側には、径方向斜め内方に且つ大気Ａ側に向かって延び、スリンガー２の円筒部２ａの表面に摺動自在に密封接触するメインリップ６と、径方向斜め内方に且つ軸受内部側に向かって延び、スリンガー２の円筒部２ａの表面に摺動自在に密封接触するサブリップ７とが設けられている。また、中間部５ｂの内周側には、径方向斜め外方に且つ大気Ａ側に向かって延び、スリンガー２の側板部２ｃの表面に摺動自在に接触するサイドリップ８が設けられている。なお、図２では、説明の便宜上、メインリップ６、サブリップ７及びサイドリップ８が、スリンガー２に組み付ける前の状態で模式的に示されている。また、シール部材５の外周面及びシール部１０の内周面もそれぞれ外側部材２１と内輪構成部材２６に組み付ける前の状態で示されている。 The seal member 5 covers the outer peripheral side of the end of the cylindrical part 4a on the atmosphere A side, covers the outer peripheral part 5a fitted in the outer member 21, and covers the inner peripheral side of the cylindrical part 4a and the atmosphere A side of the side plate part 4b. It has the intermediate part 5b and the inner peripheral part 5c which covers the area | region of the inner peripheral side of the side-plate part 4b. A part of the inner peripheral portion 5c covers the bearing inner side surface of the side plate portion 4b.
A main lip 6 extending radially inward in the radial direction and toward the atmosphere A side and slidably sealingly contacts the surface of the cylindrical portion 2a of the slinger 2 is formed on the inner side of the inner peripheral portion 5c. A sub lip 7 is provided which extends inward and toward the inside of the bearing and slidably sealingly contacts the surface of the cylindrical portion 2a of the slinger 2. Further, on the inner peripheral side of the intermediate portion 5b, a side lip 8 is provided which extends obliquely outward in the radial direction and toward the atmosphere A side and slidably contacts the surface of the side plate portion 2c of the slinger 2. . In FIG. 2, for convenience of explanation, the main lip 6, the sub lip 7, and the side lip 8 are schematically shown in a state before being assembled to the slinger 2. Further, the outer peripheral surface of the seal member 5 and the inner peripheral surface of the seal portion 10 are also shown in a state before being assembled to the outer member 21 and the inner ring constituting member 26, respectively.

メインリップ６は、スリンガー２の円筒部２ａ表面と接触する接触部６ａと、この接触部６ａからさらに径方向斜め外方に且つ大気Ａ側に向かって延ばされた先端部６ｂとからなっている。本実施の形態では、先端部６ｂの外周面に環状の凹部６ｃが形成されており、この凹部６ｃに環状のばね９が取り付けられている。ばね９の弾性力によりメインリップの接触部６ａがスリンガー２の円筒部２ａの表面に押し付けられるので、メインリップ６とスリンガー２との密封性が高められる。
かかるメインリップ６、サブリップ７及びサイドリップ８を備えたシール本体３をスリンガー２に組み付けると、サブリップ７の先端が軸受内部側を向いて円筒部２ａの表面に、サイドリップ８の先端が径外方向を向いて側板部４ｂの表面に、それぞれ摺接する。また、メインリップ６は、ばね９によって径内方向に締め付けられ、当該ばね９と円筒部２ａとで挟持され、その接触部６ａが弾性変形して円筒部２ａの表面に摺接することになる。 The main lip 6 includes a contact portion 6a that contacts the surface of the cylindrical portion 2a of the slinger 2, and a tip portion 6b that extends further radially outward from the contact portion 6a toward the atmosphere A side. Yes. In the present embodiment, an annular recess 6c is formed on the outer peripheral surface of the tip 6b, and an annular spring 9 is attached to the recess 6c. Since the contact portion 6a of the main lip is pressed against the surface of the cylindrical portion 2a of the slinger 2 by the elastic force of the spring 9, the sealing performance between the main lip 6 and the slinger 2 is improved.
When the seal body 3 including the main lip 6, the sub lip 7 and the side lip 8 is assembled to the slinger 2, the tip of the sub lip 7 faces the inner side of the bearing, and the tip of the side lip 8 is out of the diameter. It faces the direction and slidably contacts the surface of the side plate portion 4b. Further, the main lip 6 is tightened in the radially inward direction by the spring 9 and is sandwiched between the spring 9 and the cylindrical portion 2a, and the contact portion 6a is elastically deformed and comes into sliding contact with the surface of the cylindrical portion 2a.

シール部１０は、ゴム状の弾性体からなる環状部材であり、スリンガー２のコーナ部２ｂに沿って設けられている。このシール部１０も加硫による接着、焼付けなどによりコーナ部２ｂに固定される。シール部１０は、スリンガー２の大気Ａ面側に拡径する側板部１１と、この側板部１１から軸方向において軸受内部側に延びる円筒体１２とからなっており、この円筒体１２は、円筒形の内周面１２ａと、この円筒形の内周面１２ａから軸受内部側に向かって漸次拡径したテーパ面１２ｂを有している。   The seal portion 10 is an annular member made of a rubber-like elastic body, and is provided along the corner portion 2 b of the slinger 2. This seal portion 10 is also fixed to the corner portion 2b by adhesion or baking by vulcanization. The seal portion 10 includes a side plate portion 11 that expands toward the atmosphere A surface side of the slinger 2, and a cylindrical body 12 that extends from the side plate portion 11 to the bearing inner side in the axial direction. A cylindrical inner peripheral surface 12a, and a tapered surface 12b gradually expanding from the cylindrical inner peripheral surface 12a toward the bearing inner side.

スリンガー２を内輪構成部材２６に組み込む際に、スリンガー２の円筒部２ａが内輪構成部材２６の大気Ａ側端面から圧入され金属嵌合される。次に、シール部１０の円筒体１２のテーパ面１２ｂ、次いで円筒形の内周面１２ａが内輪構成部材２６と嵌合される。円筒体１２は、ゴム状の弾性体からなり、内周面１２ａの内径寸法を内輪構成部材２６よりも小さく設定しているため、内輪構成部材２６との間で締め代を有し、ゴム状弾性体が圧縮されて嵌合されている。   When the slinger 2 is incorporated into the inner ring constituent member 26, the cylindrical portion 2a of the slinger 2 is press-fitted from the atmosphere A side end surface of the inner ring constituent member 26 and is metal-fitted. Next, the tapered surface 12 b of the cylindrical body 12 of the seal portion 10, and then the cylindrical inner peripheral surface 12 a are fitted with the inner ring constituent member 26. The cylindrical body 12 is made of a rubber-like elastic body, and the inner diameter of the inner peripheral surface 12a is set to be smaller than that of the inner ring constituent member 26. The elastic body is compressed and fitted.

これによって、スリンガー２と内輪構成部材２６との間の密封性をさらに高めることができ、泥水雰囲気の厳しい環境下であっても、スリンガー２と内輪構成部材２６との間から軸受内部に外部の泥水等が浸入するのを防止することができる。   As a result, the sealing performance between the slinger 2 and the inner ring constituent member 26 can be further improved, and even under a severe muddy water environment, the outside of the bearing between the slinger 2 and the inner ring constituent member 26 is introduced into the bearing. Infiltration of muddy water and the like can be prevented.

以上の構成によれば、スリンガー２と内輪構成部材２６との嵌合面に仮に熱膨張率の差や腐食などによって隙間が生じたとしても、前記シール部１０がスリンガー２と内輪構成部材２６との間の密封性を維持するので、当該嵌合面に生じた隙間から軸受内部に外部の泥水等が浸入するのを効果的に防止することができる。これにより、転動体などの摩耗を防止して、軸受装置の寿命を向上させることができる。   According to the above configuration, even if a gap is generated on the fitting surface between the slinger 2 and the inner ring constituent member 26 due to a difference in thermal expansion coefficient, corrosion, or the like, the seal portion 10 is connected to the slinger 2 and the inner ring constituent member 26. Therefore, it is possible to effectively prevent external muddy water or the like from entering the bearing through the gap formed on the fitting surface. Thereby, abrasion of a rolling element etc. can be prevented and the lifetime of a bearing apparatus can be improved.

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、種々の変更を加えることができる。例えば、前述した実施の形態では、スリンガー２と、回転側部材である内輪構成部材２６との間を密封するシール部１０が設けられているが、外側部材が回転側部材の場合、当該外側部材に内嵌されるスリンガーと外側部材との間を密封するシール部を設けることによって、前述した実施の形態と同等の効果を得ることができる。
また、図３に示すようにスリンガー２の側板部２ｃに着磁ゴム１３を加硫接着させることにより回転数検出用パルサリングに適用することもできる。
前述した実施の形態における密封装置１は、アンギュラ玉軸受等の内輪と外輪とからなる軸受装置に限らず、互いに相対回転する外側部材と内側部材を含む装置ないしは機器に広く適用することができる。 In addition, this invention is not limited to embodiment mentioned above, A various change can be added. For example, in the embodiment described above, the seal portion 10 that seals between the slinger 2 and the inner ring constituent member 26 that is the rotation side member is provided. However, when the outer member is the rotation side member, the outer member By providing a seal portion that seals between the slinger fitted inside and the outer member, an effect equivalent to that of the above-described embodiment can be obtained.
Further, as shown in FIG. 3, the magnetized rubber 13 can be vulcanized and bonded to the side plate portion 2c of the slinger 2 to be applied to rotation speed detection pulsar ring.
The sealing device 1 in the above-described embodiment is not limited to a bearing device including an inner ring and an outer ring, such as an angular ball bearing, and can be widely applied to devices or devices including an outer member and an inner member that rotate relative to each other.

本発明の一実施の形態に係る密封装置を備えた駆動輪用軸受装置示す軸方向断面図である。It is an axial sectional view showing a bearing device for a driving wheel provided with a sealing device according to an embodiment of the present invention. 図１に示される密封装置の拡大断面図である。It is an expanded sectional view of the sealing device shown by FIG. 本発明の密封装置の他の実施の形態の拡大断面図である。It is an expanded sectional view of other embodiments of the sealing device of the present invention.

符号の説明Explanation of symbols

１ 密封装置
２ スリンガー
２ａ 円筒部
２ｂ コーナ部
２ｃ 側板部
３ シール本体
４ 金属環
４ａ 円筒部
４ｂ 側板部
５ シール部材
６ メインリップ
７ サブリップ
８ サイドリップ
９ ばね
１０ シール部
１１ 側板部
１２ 円筒体
１３ 着磁ゴム
２０ 軸受装置
２１ 外側部材
２２ 内側部材
２４ アクスル
２５ ハブ
２６ 内輪構成部材 DESCRIPTION OF SYMBOLS 1 Sealing device 2 Slinger 2a Cylindrical part 2b Corner part 2c Side board part 3 Seal body 4 Metal ring 4a Cylindrical part 4b Side board part 5 Seal member 6 Main lip 7 Sub lip 8 Side lip 9 Spring 10 Seal part 11 Side board part 12 Cylindrical body 13 Attachment Magnetic rubber 20 Bearing device 21 Outer member 22 Inner member 24 Axle 25 Hub 26 Inner ring component

Claims (2)

同芯にて互いに相対回転可能に配置された内側部材と外側部材との間に構成される環状空間に装着され、前記内側部材及び外側部材のうちの一方の部材に嵌合されるシール本体と、
前記内側部材及び外側部材のうちの他方の部材に嵌合される円筒部と、この円筒部の一端部からコーナ部を介して径方向に延びる環状の側板部とを有する断面Ｌ字状のスリンガーと、を備える密封装置において、
前記スリンガーの円筒部と前記他方の部材との間を密封する環状のシール部が、前記スリンガーのコーナ部に沿って設けられていることを特徴とする密封装置。 A seal body that is mounted in an annular space formed between an inner member and an outer member that are concentrically arranged to be relatively rotatable with each other, and is fitted to one of the inner member and the outer member; ,
A slinger with an L-shaped cross section having a cylindrical portion fitted to the other member of the inner member and the outer member, and an annular side plate portion extending radially from one end portion of the cylindrical portion via a corner portion And a sealing device comprising:
A sealing device, wherein an annular seal portion that seals between the cylindrical portion of the slinger and the other member is provided along a corner portion of the slinger. 前記シール部が、前記コーナ部から前記円筒部の他端側に向かって延びて、当該コーナ部と他方の部材との間に形成される断面楔状の環状空間を密封する円筒体を有する請求項１記載の密封装置。   The said seal part has a cylindrical body which extends toward the other end side of the said cylindrical part from the said corner part, and seals the cross-sectional wedge-shaped annular space formed between the said corner part and the other member. The sealing device according to 1.
JP2007300501A 2007-11-20 2007-11-20 Hermetically sealing device Pending JP2009127668A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009185965A (en) * 2008-02-08 2009-08-20 Nsk Ltd Rolling bearing unit with combination seal ring
WO2016181515A1 (en) * 2015-05-12 2016-11-17 日本精工株式会社 Magnetic encoder and rolling bearing
DE102016216494A1 (en) * 2016-09-01 2017-06-29 Schaeffler Technologies AG & Co. KG Sealing arrangement of a wheel bearing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545337U (en) * 1991-11-20 1993-06-18 内山工業株式会社 Wheel seal
JP2002206547A (en) * 2001-01-09 2002-07-26 Nsk Ltd Seal ring and bearing unit with seal ring for wheel
JP2002333035A (en) * 2001-05-09 2002-11-22 Nsk Ltd Combined seal ring with encoder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545337U (en) * 1991-11-20 1993-06-18 内山工業株式会社 Wheel seal
JP2002206547A (en) * 2001-01-09 2002-07-26 Nsk Ltd Seal ring and bearing unit with seal ring for wheel
JP2002333035A (en) * 2001-05-09 2002-11-22 Nsk Ltd Combined seal ring with encoder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009185965A (en) * 2008-02-08 2009-08-20 Nsk Ltd Rolling bearing unit with combination seal ring
WO2016181515A1 (en) * 2015-05-12 2016-11-17 日本精工株式会社 Magnetic encoder and rolling bearing
DE102016216494A1 (en) * 2016-09-01 2017-06-29 Schaeffler Technologies AG & Co. KG Sealing arrangement of a wheel bearing

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