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JP2007332990A - Sealing device - Google Patents

Sealing device Download PDF

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Publication number
JP2007332990A
JP2007332990A JP2006162338A JP2006162338A JP2007332990A JP 2007332990 A JP2007332990 A JP 2007332990A JP 2006162338 A JP2006162338 A JP 2006162338A JP 2006162338 A JP2006162338 A JP 2006162338A JP 2007332990 A JP2007332990 A JP 2007332990A
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JP
Japan
Prior art keywords
sealing device
axial
slinger
seal body
cored bar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2006162338A
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Japanese (ja)
Inventor
Shuji Fujita
修司 藤田
Shunichi Fujiwara
俊一 藤原
Yoshishige Kasai
良茂 笠井
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Koyo Sealing Techno Co Ltd
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Koyo Sealing Techno Co Ltd
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Priority to JP2006162338A priority Critical patent/JP2007332990A/en
Publication of JP2007332990A publication Critical patent/JP2007332990A/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
    • F16C33/7873—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
    • 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
    • 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
    • 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
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/66—Water repelling
    • 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)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device capable of preventing abrasion or deterioration of an axial lip caused by stay or deposition of muddy water. <P>SOLUTION: This device is equipped with a core bar 10 having a core bar cylindrical part 10a inserted into an outer ring 3 and a core bar circular part 10b extending from one axial edge of the core bar cylindrical part 10a toward the diametral inward direction, and a seal body 11 mounted axially outside the core bar 10 and on the diametral inside direction. The seal body 11 has the axial lip 13 extending to the axially outside, and a water-repellent material is coated on a range from the axially outside end face of the seal body 11 to the axial lip 13 outside face. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は密封装置に関する。   The present invention relates to a sealing device.

自動車等の車両の車輪が取り付けられる転がり軸受装置として、例えば、内輪と、この内輪に転動体を介して外嵌するよう設けられた外輪とを備えたものがある。そして、この転がり軸受装置の内輪と外輪との間の環状空間を封止するために、軸方向両側に、円環状の密封装置が備えられており、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。   As a rolling bearing device to which a wheel of a vehicle such as an automobile is attached, for example, there is one provided with an inner ring and an outer ring provided so as to be fitted on the inner ring via a rolling element. In order to seal the annular space between the inner ring and the outer ring of the rolling bearing device, annular sealing devices are provided on both sides in the axial direction, and leakage of lubricant inside the rolling bearing device and external Intrusion of foreign matter such as muddy water from

内輪と外輪との間に設けられている密封装置として、例えば図４に示されるように、外輪１０３の内周に固定されるシールリング１０９と、内輪１０２の外周に固定される金属製のスリンガー１０４とを備えたものがある。シールリング１０９は、外輪１０３の内周に嵌合固定される芯金円筒部１１０ａ及びこの芯金円筒部１１０ａの軸方向一方（図４において左側）の端縁から径内方向に延びる芯金環状部１１０ｂを有する芯金１１０と、主に芯金円筒部１１０ａの内周面及び芯金環状部１１０ｂの軸方向他方側側面に取り付けられたゴム状弾性体からなるシール本体１１１とで構成されている。また、スリンガー１０４は、内輪１０２の外周面に嵌合固定されるスリンガー円筒部１０４ａと、このスリンガー円筒部１０４ａの軸方向他方の端縁から径外方向に延びるスリンガー環状部１０４ｂとで構成されている。   As a sealing device provided between the inner ring and the outer ring, for example, as shown in FIG. 4, a seal ring 109 fixed to the inner periphery of the outer ring 103 and a metal slinger fixed to the outer periphery of the inner ring 102. And 104. The seal ring 109 includes a cored bar cylindrical portion 110a fitted and fixed to the inner periphery of the outer ring 103, and a cored bar ring extending radially inward from one axial end (left side in FIG. 4) of the cored bar cylindrical section 110a. A core 110 having a portion 110b, and a seal body 111 mainly composed of a rubber-like elastic body attached to the inner peripheral surface of the core metal cylindrical portion 110a and the other side surface in the axial direction of the core metal annular portion 110b. Yes. The slinger 104 includes a slinger cylindrical portion 104a that is fitted and fixed to the outer peripheral surface of the inner ring 102, and a slinger annular portion 104b that extends radially outward from the other axial end edge of the slinger cylindrical portion 104a. Yes.

また、シール本体１１１は、芯金環状部１１０ｂの径内側端部に取り付けられた基部１１１ａを有し、この基部１１１ａから弾性変形した状態で延びてスリンガー円筒部１０４ａの外周面に摺接するラジアルリップ１１２と、基部１１１ａから弾性変形した状態で延びてスリンガー環状部１０４ｂの軸方向一方側側面に摺接するアキシャルリップ１１３とを備えている（例えば、特許文献１参照）。   The seal body 111 has a base 111a attached to a radially inner end of the cored bar annular portion 110b. The radial lip extends in an elastically deformed state from the base 111a and is in sliding contact with the outer peripheral surface of the slinger cylindrical portion 104a. 112 and an axial lip 113 that extends in an elastically deformed state from the base portion 111a and slidably contacts one side surface in the axial direction of the slinger annular portion 104b (see, for example, Patent Document 1).

特開２００６−８３９８１号公報JP 2006-83981 A

前述した従来の密封装置は、外部からの泥水の侵入を、主としてスリンガー１０４により防止するシール構造を有している。しかし、泥水が過剰に存在する場合、スリンガー環状部１０４ｂの先端とシールリング１０９との隙間よりスリンガー内部のアキシャルリップ１１３まで泥水が侵入し、当該アキシャルリップ１１３の外周付近に泥水が滞留、堆積する。その結果、アキシャルリップ１１３が摩耗し易くなり、アキシャルリップ１１３の内部側まで泥水が侵入し、転がり軸受装置の機能に支障を来たすという問題点があった。   The above-described conventional sealing device has a seal structure that mainly prevents sludge from entering from the outside by the slinger 104. However, when there is an excessive amount of muddy water, the muddy water enters the axial lip 113 inside the slinger through the gap between the tip of the slinger annular portion 104b and the seal ring 109, and the muddy water stays and accumulates near the outer periphery of the axial lip 113. . As a result, the axial lip 113 is likely to wear, and muddy water enters the inside of the axial lip 113, causing a problem in the function of the rolling bearing device.

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、泥水の滞留、堆積によって、アキシャルリップが摩耗し、劣化するの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する。   This invention is made in view of such a problem, and it aims at providing the sealing device which can prevent that an axial lip wears and deteriorates by staying and accumulation of muddy water. .

前記目的を達成するための本発明の密封装置は、互いに相対回転する内側部材と外側部材との間の空間に配設される密封装置であって、前記外側部材に内嵌される芯金円筒部とこの芯金円筒部の軸方向一方の端縁から径内方向に延びる芯金環状部とを有する芯金と、この芯金の軸方向外側及び径方向内側に取り付けられたシール本体と、を備えており、前記シール本体が、軸方向外側に延びるアキシャルリップを有しており、前記シール本体の軸方向外側端面からアキシャルリップ外側面にかけての表面に撥水性物質をコーティングしたことを特徴としている。
本発明の密封装置では、前記シール本体の軸方向外側端面からアキシャルリップ外側面にかけての表面に撥水性物質がコーティングされているので、そのようなコーティングがなされていない従来の場合に比べて、前記シール本体の軸方向外側端面からアキシャルリップ外側面にかけての表面に付着する水を弾き易い構造となっている。このため、外部から泥水が侵入したとしても、この泥水はシール本体表面に付着することなく、軸受の回転停止時などに容易に排出されることから、泥水がアキシャルリップに滞留、堆積するのが防止される。その結果、アキシャルリップが摩耗により劣化することがなく、密封装置のシール機能を長期間に渡って維持することができる。なお、前記軸方向外側とは、密封装置の外部側、換言すれば内側部材と外側部材間に配設される転動体が位置する側と反対側のことをいう。 In order to achieve the above object, a sealing device according to the present invention is a sealing device disposed in a space between an inner member and an outer member that rotate relative to each other, and is a core metal cylinder fitted in the outer member. And a seal body attached to the outer side in the axial direction and the inner side in the radial direction of the cored bar, and a cored bar annular portion extending radially inward from one axial end edge of the cored bar cylindrical part, The seal body has an axial lip extending outward in the axial direction, and a surface of the seal body from the axially outer end surface to the outer surface of the axial lip is coated with a water repellent material. Yes.
In the sealing device of the present invention, since the surface from the axially outer end surface of the seal body to the outer surface of the axial lip is coated with a water repellent material, compared to the conventional case where such coating is not performed, It has a structure in which water adhering to the surface from the axially outer end surface of the seal body to the axial lip outer surface can be easily repelled. For this reason, even if muddy water enters from the outside, this muddy water does not adhere to the seal body surface and is easily discharged when the rotation of the bearing is stopped, etc., so that muddy water stays and accumulates on the axial lip. Is prevented. As a result, the axial lip is not deteriorated due to wear, and the sealing function of the sealing device can be maintained for a long period of time. In addition, the said axial direction outer side means the outer side of a sealing device, in other words, the opposite side to the side where the rolling element arrange | positioned between an inner side member and an outer side member is located.

また、前記外側部材が軸受装置の外輪であり、前記内側部材が前記外輪に対して同軸心状に配置された内輪であり、且つ、前記密封装置が、この内輪に外嵌されるスリンガー円筒部とこのスリンガー円筒部の軸方向他方の端縁から径外方向に延びるスリンガー環状部とからなるスリンガーを有していてもよい。このような構成によれば、軸受装置の密封装置に対し、アキシャルリップの摩耗による劣化を防止し、当該密封装置のシール機能を長期間に渡って維持することができる。   Further, the outer member is an outer ring of the bearing device, the inner member is an inner ring arranged coaxially with respect to the outer ring, and the sealing device is a slinger cylindrical portion that is externally fitted to the inner ring. And a slinger comprising a slinger annular portion extending radially outward from the other axial end edge of the slinger cylindrical portion. According to such a configuration, the sealing device of the bearing device can be prevented from being deteriorated due to wear of the axial lip, and the sealing function of the sealing device can be maintained over a long period of time.

また、前記撥水性物質が、ポリテトラフルオロエチレン、二硫化モリブデン又はダイヤモンドライクカーボンであることが好ましい。このような構造であれば、前記シール本体の軸方向外側端面からアキシャルリップ外側面にかけての表面が高い撥水性能を有するため、前記表面への泥水の滞留、堆積を効果的に防止することができ、その結果、摩耗によるアキシャルリップの劣化を防いで当該アキシャルリップの機能を長期に渡り維持することができる。   The water-repellent substance is preferably polytetrafluoroethylene, molybdenum disulfide or diamond-like carbon. With such a structure, the surface from the outer end surface in the axial direction of the seal body to the outer surface of the axial lip has high water repellency, so that muddy water can be effectively prevented from staying and depositing on the surface. As a result, deterioration of the axial lip due to wear can be prevented, and the function of the axial lip can be maintained over a long period of time.

本発明の密封装置によれば、シール本体の軸方向外側端面からアキシャルリップ外側面にかけての表面を十分な撥水性能を有する構造にすることができるので、泥水の滞留、堆積による摩耗によって、アキシャルリップが劣化するのを防止することができる。   According to the sealing device of the present invention, the surface from the outer end surface in the axial direction of the seal body to the outer surface of the axial lip can have a structure having sufficient water repellency. It is possible to prevent the lip from deteriorating.

以下、図面を参照しつつ、本発明の密封装置の実施の形態を説明する。
図１は、本発明の一実施の形態に係る密封装置が組み付けられた転がり軸受装置（以下、単に軸受装置ともいう）を示す断面説明図である。図２は図１における車両アウタ側の密封装置を示す断面説明図であり、図３は図１における車両インナ側の密封装置を示す断面説明図である。なお、これらの図における左右方向を軸方向といい、上下方向を径方向という。また、前述したように、密封装置の外部側を軸方向外側といい、内部側を軸方向内側という。 Hereinafter, embodiments of the sealing device of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional explanatory view showing a rolling bearing device (hereinafter also simply referred to as a bearing device) in which a sealing device according to an embodiment of the present invention is assembled. 2 is a cross-sectional explanatory view showing the sealing device on the vehicle outer side in FIG. 1, and FIG. 3 is a cross-sectional explanatory view showing the sealing device on the vehicle inner side in FIG. In addition, the left-right direction in these figures is called an axial direction, and the up-down direction is called radial direction. Further, as described above, the outer side of the sealing device is referred to as the axially outer side, and the inner side is referred to as the axially inner side.

図１に示すように、この軸受装置１は、車両の車輪が取り付けられる内軸２と、この内軸２に外嵌するよう設けられた外輪３と、内軸２と外輪３との間に設けられた複列の転動体４、５とを備えている。   As shown in FIG. 1, the bearing device 1 includes an inner shaft 2 to which a vehicle wheel is attached, an outer ring 3 provided so as to be fitted on the inner shaft 2, and an inner shaft 2 and an outer ring 3. The double row rolling elements 4 and 5 provided are provided.

内側部材である内軸２は車両アウタ側（図１において左側）端部に車輪側部材（図示せず）を取り付けるためのフランジ２ｃを有し、内軸２の車両インナ側（図１において右側）に小径部２ｄが形成されており、その小径部２ｄに内輪構成部材６が外嵌されている。この内輪構成部材６及び内軸２により、内輪９が構成されている。前記内輪構成部材６はその外周面に車両インナ側の転動体５用の内輪軌道６ａが形成されている。また、内軸２の軸方向中間部の中径部２ｅに車両アウタ側の転動体４用の内輪軌道２ａが形成されている。更に、内軸２の車両インナ側端部は、外周側が径外方に広げられて形成されたかしめ部２ｆを有しており、かしめ部２ｆが内輪構成部材６を内軸２から抜け止め固定している。   The inner shaft 2, which is an inner member, has a flange 2c for attaching a wheel side member (not shown) at the end of the vehicle outer side (left side in FIG. 1), and the vehicle inner side (right side in FIG. 1) of the inner shaft 2 ) Is formed with a small-diameter portion 2d, and the inner ring constituting member 6 is fitted on the small-diameter portion 2d. An inner ring 9 is configured by the inner ring constituting member 6 and the inner shaft 2. An inner ring raceway 6a for the rolling element 5 on the vehicle inner side is formed on the outer peripheral surface of the inner ring constituting member 6. Further, an inner ring raceway 2a for the rolling element 4 on the vehicle outer side is formed in the middle diameter portion 2e of the intermediate portion in the axial direction of the inner shaft 2. Furthermore, the vehicle inner side end portion of the inner shaft 2 has a caulking portion 2f formed with the outer peripheral side being expanded radially outward, and the caulking portion 2f fixes the inner ring constituent member 6 from the inner shaft 2 to prevent it from coming off. is doing.

一方、外側部材である外輪３は、複列の転動体４、５を介して内軸２に外嵌すると共に内軸２と同軸心状に設けられている。この外輪３の内周面に複列の転動体４、５用の複列の外側軌道３ａが形成されている。外輪３の外周面にはフランジ３ｃが形成されており、このフランジ３ｃが車体側部材（図示せず）に取り付けられて、この軸受装置が車体側部材に固定される。つまり、外輪３が固定側とされ、内軸２が軸心回りに回転する回転側とされている。そして、内軸２と外軸３との間の環状空間Ｒを封止するために、軸方向両端部に本実施の形態に係る環状の密封装置７、８が設けられている。   On the other hand, the outer ring 3 that is an outer member is fitted on the inner shaft 2 via double-row rolling elements 4 and 5 and is provided coaxially with the inner shaft 2. A double row outer raceway 3 a for the double row rolling elements 4 and 5 is formed on the inner peripheral surface of the outer ring 3. A flange 3c is formed on the outer peripheral surface of the outer ring 3. The flange 3c is attached to a vehicle body side member (not shown), and the bearing device is fixed to the vehicle body side member. That is, the outer ring 3 is the fixed side, and the inner shaft 2 is the rotating side that rotates about the axis. And in order to seal the annular space R between the inner shaft 2 and the outer shaft 3, the annular sealing devices 7 and 8 which concern on this Embodiment are provided in the axial direction both ends.

図２の断面図に示す密封装置は、図１の車両アウタ側の密封装置７として用いることができるものである。この密封装置７は外輪３の内周面３ｂと内軸２の外周面２ｂとの間に設けられており、転動体４、５側である軸受装置内部からの潤滑剤の漏洩と、軸受装置外部から転動体４、５側への泥水等の異物の侵入を防止する。   The sealing device shown in the sectional view of FIG. 2 can be used as the sealing device 7 on the vehicle outer side of FIG. This sealing device 7 is provided between the inner peripheral surface 3b of the outer ring 3 and the outer peripheral surface 2b of the inner shaft 2, and leakage of lubricant from the inside of the bearing device on the rolling elements 4 and 5 side, and the bearing device. Intrusion of foreign matter such as muddy water from the outside to the rolling elements 4 and 5 is prevented.

密封装置７は、芯金１０とこの芯金１０に固定されたシール本体１１とから構成されている。芯金１０は、外輪３に内嵌される芯金円筒部１０ａと、この芯金円筒部１０ａの軸方向一方の端部１０ｃから径内方へ折り曲げられた芯金環状部１０ｂとからなっている。芯金１０は全体が環状となっており、例えば、冷延鋼板であるＳＰＣＣ，ＳＰＣＤ，ＳＰＣＥ等をプレス加工することで形成される。そして、例えばゴム等の弾性体からなるシール本体１１が前記芯金１０と一体となるよう固着されている。   The sealing device 7 includes a cored bar 10 and a seal body 11 fixed to the cored bar 10. The cored bar 10 includes a cored bar cylindrical part 10a fitted into the outer ring 3 and a cored bar annular part 10b bent radially inward from one axial end 10c of the cored bar cylindrical part 10a. Yes. The core metal 10 has an annular shape as a whole, and is formed by, for example, pressing a cold-rolled steel plate such as SPCC, SPCD, SPCE or the like. A seal body 11 made of an elastic body such as rubber is fixed so as to be integrated with the cored bar 10.

シール本体１１は、前記芯金環状部１０ｂの径方向内側及び軸方向外側に取り付けられた基部１１ａ、１１ｃを有し、この基部１１ａから弾性変形した状態で延びて内軸２の外周面２ｂに摺接するラジアルリップ１２と、基部１１ｃから弾性変形した状態で延びて内軸２の外周面２ｂに摺接するアキシャルリップ１３とを備えている。そして、ラジアルリップ１２は、先端部が軸方向外側に向くように傾斜するメインリップ１２ａと、先端部が軸方向内側に向くように傾斜するサブリップ１２ｂとから構成されている。   The seal body 11 has base portions 11a and 11c attached to the inner side in the radial direction and the outer side in the axial direction of the cored bar annular portion 10b, and extends in an elastically deformed state from the base portion 11a to the outer peripheral surface 2b of the inner shaft 2. A radial lip 12 that comes into sliding contact and an axial lip 13 that extends in an elastically deformed state from the base 11c and comes into sliding contact with the outer peripheral surface 2b of the inner shaft 2 are provided. The radial lip 12 is composed of a main lip 12a that is inclined so that the tip end is directed outward in the axial direction, and a sub lip 12b that is inclined so that the tip is directed inward in the axial direction.

前記シール本体１１の軸方向外側端面からアキシャルリップ１３外側面にかけて撥水性物質がコーティングされた被覆層１１ｂを形成している。この撥水性物質は、水を弾く性質を有するものであり、例えばポリテトラフルオロエチレン、二硫化モリブデン又はダイヤモンドライクカーボンからなっている。   A coating layer 11b coated with a water repellent material is formed from the outer end surface in the axial direction of the seal body 11 to the outer surface of the axial lip 13. This water repellent substance has a property of repelling water, and is made of, for example, polytetrafluoroethylene, molybdenum disulfide, or diamond-like carbon.

本実施の形態の密封装置７では、シール本体１１の軸方向外側端面からアキシャルリップ１３外側面にかけての表面に、撥水性物質がコーティングされており、これによってシール本体１１の当該表面は十分な撥水性能を有する構造となっている。このため、外部から泥水が侵入したとしても、この泥水はシール本体１１表面に付着することなく、軸受の回転停止時などに容易に排出されることから、泥水がアキシャルリップに滞留、堆積するのが防止される。その結果、アキシャルリップ１３が摩耗により劣化することがなく、密封装置７のシール機能を長期間に渡って維持することができる。   In the sealing device 7 of the present embodiment, the surface of the seal body 11 from the outer end surface in the axial direction to the outer surface of the axial lip 13 is coated with a water-repellent substance. It has a structure with water performance. For this reason, even if muddy water enters from the outside, this muddy water does not adhere to the surface of the seal body 11 and is easily discharged when the rotation of the bearing is stopped. Therefore, the muddy water stays and accumulates on the axial lip. Is prevented. As a result, the axial lip 13 does not deteriorate due to wear, and the sealing function of the sealing device 7 can be maintained for a long period of time.

図３の断面図に示す密封装置は、図１の車両インナ側の密封装置８として用いることができるものである。この密封装置８は外輪３の内周面３ｂと内輪構成部材６の外周面６ｂとの間に設けられ、転動体４、５側である軸受装置内部の潤滑剤の漏洩と、軸受装置外部から転動体４、５側への泥水等の異物の侵入を防止する。密封装置８は、外輪３に内嵌させて固着されるシールリング２０と、内輪構成部材６に外嵌させて固着されるスリンガー２２とを備えている。   The sealing device shown in the sectional view of FIG. 3 can be used as the sealing device 8 on the vehicle inner side of FIG. The sealing device 8 is provided between the inner peripheral surface 3b of the outer ring 3 and the outer peripheral surface 6b of the inner ring constituting member 6, and leaks lubricant inside the bearing device on the rolling elements 4 and 5 side, and from the outside of the bearing device. Intrusion of foreign matter such as muddy water into the rolling elements 4 and 5 is prevented. The sealing device 8 includes a seal ring 20 that is fixedly fitted to the outer ring 3 and a slinger 22 that is fixedly fitted to the inner ring component 6.

シールリング２０は、芯金２１とこの芯金２１に固着されたシール本体２３とから構成されている。芯金２１は、外輪３に内嵌される芯金円筒部２１ａと、この芯金円筒部２１ａの軸方向一方の端部２１ｃから径内方へ折り曲げられた芯金環状部２１ｂとからなり、断面Ｌ字型となっている。芯金２１は全体が環状となっており、前記芯金１０と同様に、例えば、冷延鋼板であるＳＰＣＣ，ＳＰＣＤ，ＳＰＣＥ等をプレス加工することで形成される。そして、例えばゴム等の弾性体からなるシール本体２３がこの芯金２１と一体となるよう固着されている。   The seal ring 20 includes a cored bar 21 and a seal main body 23 fixed to the cored bar 21. The cored bar 21 includes a cored bar cylindrical part 21a fitted in the outer ring 3, and a cored bar annular part 21b bent radially inward from one axial end part 21c of the cored bar cylindrical part 21a. The cross section is L-shaped. The core metal 21 has an annular shape as a whole, and is formed by, for example, pressing a cold-rolled steel plate such as SPCC, SPCD, SPCE, etc., like the core metal 10. A seal main body 23 made of an elastic body such as rubber is fixed to be integrated with the core metal 21.

スリンガー２２は、内輪構成部材６の外周面６ｂに外嵌されたスリンガー円筒部２２ａと、このスリンガー円筒部２２ａの軸方向他方の端部２２ｃから径外方へ折り曲げられたスリンガー環状部２２ｂとからなり、断面Ｌ字型となっている。
スリンガー２２は、全体が環状となっており、例えばステンレス鋼等の金属板をプレス加工することで形成される。 The slinger 22 includes a slinger cylindrical portion 22a fitted on the outer peripheral surface 6b of the inner ring constituent member 6, and a slinger annular portion 22b bent radially outward from the other axial end portion 22c of the slinger cylindrical portion 22a. The cross section is L-shaped.
The slinger 22 has an annular shape as a whole, and is formed by, for example, pressing a metal plate such as stainless steel.

シール本体２３は、芯金環状部２１ｂの軸方向他方側の径内側端部に取り付けられた基部２３ａを有し、この基部２３ａからスリンガー円筒部２２ａ側に弾性変形した状態で延びるラジアルリップ２４と、基部２３ａから弾性変形した状態で延びてスリンガー環状部２２ｂに摺接するアキシャルリップ２５とを備えている。そして、ラジアルリップ２４は、先端部が軸方向においてスリンガー環状部２２ｂ側に向くように傾斜するメインリップ２４ａと、先端部が軸方向において前記スリンガー環状部２２ｂ側と反対側に向くように傾斜するサブリップ２４ｂとから構成されている。メインリップ２４ａ及びサブリップ２４ｂの先端部は、前記スリンガー円筒部２２ａの外周面に摺接している。
そして、シールリング２０の芯金円筒部２１ａとスリンガー円筒部２２ａとが対向し、且つ、シールリング２０の芯金環状部２１ｂとスリンガー環状部２２ｂとが対向するように密封装置８は組み立てられている。 The seal body 23 has a base portion 23a attached to the radially inner end portion on the other axial side of the cored bar annular portion 21b, and a radial lip 24 extending in a state of being elastically deformed from the base portion 23a to the slinger cylindrical portion 22a side. The axial lip 25 extends in an elastically deformed state from the base portion 23a and is in sliding contact with the slinger annular portion 22b. The radial lip 24 is inclined so that the tip end portion is inclined toward the slinger annular portion 22b side in the axial direction, and the tip end portion is inclined opposite to the slinger annular portion 22b side in the axial direction. And a sub lip 24b. The leading ends of the main lip 24a and the sub lip 24b are in sliding contact with the outer peripheral surface of the slinger cylindrical portion 22a.
The sealing device 8 is assembled so that the core metal cylindrical portion 21a and the slinger cylindrical portion 22a of the seal ring 20 face each other, and the core metal annular portion 21b and the slinger annular portion 22b of the seal ring 20 face each other. Yes.

また、シール本体２３の軸方向外側端面からアキシャルリップ２５外側面にかけて前述した撥水性物質がコーティングされた被覆層２３ｂを形成している。   Further, a coating layer 23b coated with the above-described water-repellent substance is formed from the outer end surface in the axial direction of the seal body 23 to the outer surface of the axial lip 25.

本実施の形態の密封装置８では、シール本体２３の軸方向外側端面からアキシャルリップ２５外側面にかけての表面に、撥水性物質がコーティングされており、これによってシール本体２３の当該表面は十分な撥水性能を有する構造となっている。このため、外部から泥水が侵入したとしても、この泥水はシール本体２３表面に付着することなく、軸受の回転停止時などに容易に排出されることから、泥水がアキシャルリップに滞留、堆積することが防止される。その結果、アキシャルリップ２５が摩耗により劣化することがなく、密封装置８のシール機能を長期間に渡って維持することができる。   In the sealing device 8 of the present embodiment, the surface from the outer end surface in the axial direction of the seal body 23 to the outer surface of the axial lip 25 is coated with a water-repellent material, whereby the surface of the seal body 23 has sufficient repellent properties. It has a structure with water performance. For this reason, even if muddy water enters from the outside, this muddy water does not adhere to the surface of the seal body 23 and is easily discharged when the rotation of the bearing is stopped. Therefore, the muddy water stays and accumulates on the axial lip. Is prevented. As a result, the axial lip 25 is not deteriorated due to wear, and the sealing function of the sealing device 8 can be maintained for a long time.

なお、本発明の密封装置は、例示した軸受装置以外の他の車両用軸受装置、例えば円錐ころ軸受装置や円筒ころ軸受装置にも組み付けることができ、更には、車両用に限らず汎用機械の軸受装置にも適用が可能である。   The sealing device of the present invention can be assembled to other vehicle bearing devices other than the illustrated bearing device, for example, a tapered roller bearing device and a cylindrical roller bearing device. The present invention can also be applied to a bearing device.

本発明の一実施の形態に係る密封装置が組み付けられた軸受装置を示す断面説明図である。It is a section explanatory view showing the bearing device with which the sealing device concerning one embodiment of the present invention was assembled. 図１における車両アウタ側の密封装置を示す断面説明図である。FIG. 2 is a cross-sectional explanatory view showing a sealing device on the vehicle outer side in FIG. 1. 図１における車両インナ側の密封装置を示す断面説明図である。FIG. 2 is a cross-sectional explanatory view showing a sealing device on the vehicle inner side in FIG. 1. 従来の密封装置を示す断面説明図である。It is sectional explanatory drawing which shows the conventional sealing device.

符号の説明Explanation of symbols

１ 軸受装置
３、１０３ 外輪
７、８ 密封装置
９、１０２ 内輪
１０、２１、１１０ 芯金
１０ａ、２１ａ、１１０ａ 芯金円筒部
１０ｂ、２１ｂ、１１０ｂ 芯金環状部
１１、２３、１１１ シール本体
１１ｂ、２３ｂ 被覆層
１２、２０６、３１２ ラジアルリップ
１３、２５、１１３ アキシャルリップ
２２、１０４ スリンガー
２２ａ、１０４ａ スリンガー円筒部
２２ｂ、１０４ｂ スリンガー環状部
Ｒ 環状空間 DESCRIPTION OF SYMBOLS 1 Bearing apparatus 3,103 Outer ring 7,8 Sealing device 9,102 Inner ring 10,21,110 Core metal 10a, 21a, 110a Core metal cylindrical part 10b, 21b, 110b Metal core annular part 11, 23, 111 Seal main body 11b, 23b Coating layer 12, 206, 312 Radial lip 13, 25, 113 Axial lip 22, 104 Slinger 22a, 104a Slinger cylindrical part 22b, 104b Slinger annular part R Annular space

Claims (3)

互いに相対回転する内側部材と外側部材との間の空間に配設される密封装置であって、 前記外側部材に内嵌される芯金円筒部とこの芯金円筒部の軸方向一方の端縁から径内方向に延びる芯金環状部とを有する芯金と、
この芯金の軸方向外側及び径方向内側に取り付けられたシール本体と、
を備えており、前記シール本体が、軸方向外側に延びるアキシャルリップを有しており、前記シール本体の軸方向外側端面からアキシャルリップ外側面にかけての表面に撥水性物質をコーティングしたことを特徴とする密封装置。 A sealing device disposed in a space between an inner member and an outer member that rotate relative to each other, the cored bar cylindrical portion fitted into the outer member and one axial end edge of the cored bar cylindrical unit A cored bar having a cored bar annular portion extending radially inward from,
A seal body attached to the outer side in the axial direction and the inner side in the radial direction of the core;
The seal body has an axial lip extending outward in the axial direction, and the surface of the seal body from the axially outer end surface to the axial lip outer surface is coated with a water repellent material. Sealing device. 前記外側部材が軸受装置の外輪であり、前記内側部材が前記外輪に対して同軸心状に配置された内輪であり、且つ、前記密封装置が、この内輪に外嵌されるスリンガー円筒部とこのスリンガー円筒部の軸方向他方の端縁から径外方向に延びるスリンガー環状部とからなるスリンガーを有している請求項１に記載の密封装置。   The outer member is an outer ring of the bearing device, the inner member is an inner ring arranged coaxially with respect to the outer ring, and the sealing device includes a slinger cylindrical portion fitted on the inner ring, and The sealing device according to claim 1, further comprising a slinger comprising a slinger annular portion extending radially outward from the other axial end edge of the slinger cylindrical portion. 前記撥水性物質が、ポリテトラフルオロエチレン、二硫化モリブデン又はダイヤモンドライクカーボンである請求項１又は２に記載の密封装置。   The sealing device according to claim 1 or 2, wherein the water-repellent substance is polytetrafluoroethylene, molybdenum disulfide, or diamond-like carbon.
JP2006162338A 2006-06-12 2006-06-12 Sealing device Pending JP2007332990A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018210370A1 (en) * 2017-05-17 2018-11-22 Schaeffler Technologies AG & Co. KG Wheel-hub rolling element bearing assembly having a hydrophobic coating

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694028A (en) * 1979-12-27 1981-07-30 Ntn Toyo Bearing Co Ltd Seal for roll bearing
JP2001099171A (en) * 1999-09-27 2001-04-10 Koyo Seiko Co Ltd Rolling bearing and bearing unit
JP2002021863A (en) * 2000-07-05 2002-01-23 Nsk Ltd Rolling bearing
JP2002227856A (en) * 2001-01-31 2002-08-14 Koyo Seiko Co Ltd Seal device of bearing for axle
JP2005325851A (en) * 2004-05-12 2005-11-24 Ntn Corp Rolling bearing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694028A (en) * 1979-12-27 1981-07-30 Ntn Toyo Bearing Co Ltd Seal for roll bearing
JP2001099171A (en) * 1999-09-27 2001-04-10 Koyo Seiko Co Ltd Rolling bearing and bearing unit
JP2002021863A (en) * 2000-07-05 2002-01-23 Nsk Ltd Rolling bearing
JP2002227856A (en) * 2001-01-31 2002-08-14 Koyo Seiko Co Ltd Seal device of bearing for axle
JP2005325851A (en) * 2004-05-12 2005-11-24 Ntn Corp Rolling bearing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018210370A1 (en) * 2017-05-17 2018-11-22 Schaeffler Technologies AG & Co. KG Wheel-hub rolling element bearing assembly having a hydrophobic coating

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