JP4706834B2 - Hub seal - Google Patents

Hub seal Download PDF

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JP4706834B2
JP4706834B2 JP2005303872A JP2005303872A JP4706834B2 JP 4706834 B2 JP4706834 B2 JP 4706834B2 JP 2005303872 A JP2005303872 A JP 2005303872A JP 2005303872 A JP2005303872 A JP 2005303872A JP 4706834 B2 JP4706834 B2 JP 4706834B2
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seal
dust
slinger
hub
cylindrical portion
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JP2007113621A (en
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岳洋 中川
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Nok Corp
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Nok 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
    • F16C33/7879—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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Description

本発明は、ハブシールに係り、更に詳しくは、自動車ハブベアリング及び農産機関連分野等で用いられ、泥水、ダスト等の異物を除去する機能を有するハブシールに関するものである。   The present invention relates to a hub seal, and more particularly to a hub seal that is used in fields related to automobile hub bearings and agricultural machinery and has a function of removing foreign matters such as muddy water and dust.

従来、自動車ハブベアリング等に使用されるハブシールとしては、下記に示すハブシールが知られている。図９に示す従来例１のハブシール１０１は、内輪に嵌合するスリンガ１０２と、外輪に嵌合する環状部材１０３と、この環状部材１０３に接着しているシール本体部１０４とを備えている。スリンガ１０２は、内輪に嵌合する円筒部１０２ａと、その円筒部１０２ａのダスト側Ｂ端部から外径方向に延びるフランジ部１０２ｂからなる断面略Ｌ字形状をし、環状部材１０３は、スリンガ１０２と対向するように、外輪に嵌合する円筒部１０３ａと、その円筒部１０３ａのオイル側Ａ端部から内径方向に延びるフランジ部１０３ｂからなる断面略Ｌ字形状をしている。シール本体部１０４は環状部材１０３に接着しており、スリンガ１０２の円筒部１０２ａに摺動する第一シールリップ１０４ａと、それよりダスト側Ｂに位置する第二シールリップ１０４ｂと，フランジ部１０２ｂに摺動するサイドシールリップ１０４ｃとを有している。これにより、第一シールリップ１０４ａが主にオイル側Ａに封入されている油、グリース等の潤滑剤が漏洩しないようにシールし、サイドシールリップ１０４ｃと第二シールリップ１０４ｂが主に外部の泥水、ダスト等の異物が侵入しないようにシールしている。   Conventionally, the following hub seals are known as hub seals used for automobile hub bearings and the like. 9 includes a slinger 102 fitted to the inner ring, an annular member 103 fitted to the outer ring, and a seal main body 104 bonded to the annular member 103. The slinger 102 has a substantially L-shaped cross section including a cylindrical portion 102a fitted to the inner ring and a flange portion 102b extending in the outer diameter direction from the dust side B end portion of the cylindrical portion 102a. Is formed in a substantially L-shaped cross section including a cylindrical portion 103a fitted to the outer ring and a flange portion 103b extending in the inner diameter direction from the oil side A end portion of the cylindrical portion 103a. The seal body 104 is bonded to the annular member 103, and the first seal lip 104a sliding on the cylindrical portion 102a of the slinger 102, the second seal lip 104b positioned on the dust side B, and the flange portion 102b. And a sliding side seal lip 104c. As a result, the first seal lip 104a is sealed so that the lubricant such as oil and grease mainly sealed in the oil side A does not leak, and the side seal lip 104c and the second seal lip 104b are mainly used for external muddy water. It is sealed so that foreign matter such as dust does not enter.

また図１０に示す従来例２のハブシール１０１は、従来例１と同様に断面略Ｌ字形状のスリンガ１０２と環状部材１０３が対向して設けられており、環状部材１０３のフランジ部１０３ｂの端部に接着している主シールリップ１０４ａがスリンガ１０２の円筒部１０２ａに摺動し、スリンガ１０２のフランジ部１０２ｂの端部に接着している第一シールリップ１０４ｂが環状部材１０３のフランジ部１０３ｂに摺動し、第二シールリップ１０４ｃが環状部材１０３の円筒部１０３ａに摺動している。この場合には、主シールリップ１０４ａ、第一シールリップ１０４ｂ及び第二シールリップ１０４ｃで主に外部の泥水、ダスト等の異物が侵入しないようにシールしている。   Further, the hub seal 101 of the conventional example 2 shown in FIG. 10 is provided with a slinger 102 having an approximately L-shaped cross section and an annular member 103 facing each other as in the conventional example 1, and the end of the flange portion 103b of the annular member 103 is provided. The main seal lip 104a adhered to the sliding portion 102 slides on the cylindrical portion 102a of the slinger 102, and the first seal lip 104b adhered to the end portion of the flange portion 102b of the slinger 102 slides on the flange portion 103b of the annular member 103. The second seal lip 104 c slides on the cylindrical portion 103 a of the annular member 103. In this case, the main seal lip 104a, the first seal lip 104b, and the second seal lip 104c are sealed so that foreign matters such as external muddy water and dust do not enter.

しかし、上記の構成では、ダスト条件が厳しい環境においては、外部ダストを十分シールすることができず、そのため下記特許文献１および２では、耐ダスト性を向上するためにスリンガのフランジ部の端部に軸方向に延びる第二円筒部を設け、該第二円筒部の外周面にダストシールリップを設けダストがシール内部に侵入するのを防止することが提案されているが、ダストシールリップを増加するためハブシール全体が大きくなり、ハブシールを装着するための装着スペースが拡大するという不具合があった。   However, in the above configuration, the external dust cannot be sufficiently sealed in an environment where the dust conditions are severe. For this reason, in Patent Documents 1 and 2 below, the end portion of the flange portion of the slinger is used to improve dust resistance. In order to increase the dust seal lip, it is proposed to provide a second cylindrical portion extending in the axial direction and a dust seal lip on the outer peripheral surface of the second cylindrical portion to prevent dust from entering the seal. There was a problem that the entire hub seal became large and the mounting space for mounting the hub seal expanded.

実公平０７−４０１２７号公報No. 07-40127 実用新案登録第２５９２４８７号公報Utility Model Registration No. 2592487

本発明は上記の従来技術の問題点を解決するためになされたもので、その目的とするところは、ダスト条件が厳しい環境であっても十分シールすることができ、しかも、従来の装着スペースに装着することができるハブシールを提供することである。   The present invention has been made to solve the above-described problems of the prior art, and the object of the present invention is to provide a sufficient seal even in an environment where the dust conditions are severe, and to the conventional mounting space. It is to provide a hub seal that can be installed.

上記目的を達成するため、本発明の請求項１に係るハブシールは、相対回転する二部材間の環状空間をシールするものであって、一の部材に嵌合するスリンガと、他の部材に嵌合する環状部材と、該環状部材に接着しているゴム状弾性体よりなるシール本体部と、を備えたハブシールにおいて、前記スリンガは、前記一の部材に嵌合している第一円筒部と、該第一円筒部の端部から径方向に延びるフランジ部と、該フランジ部の端部から軸方向に延びる第二円筒部を備え、前記環状部材の円筒部に接着している前記シール本体部の固定密封部の周面に形成された軸方向に延びる突起部が、前記第二円筒部の周面と摺動自在に密接しており、前記突起部は、複数が円周方向に等間隔に形成されていて、この複数の突起部がそれぞれ前記第二円筒部の周面と摺動自在に密接し、更に前記突起部はそれぞれ、そのダスト側部分の剛性がオイル側部分の剛性よりも低く形成されていて、回転時にダストを掻き出す方向に前記ダスト側部分が傾斜可能とされていることを特徴とするものである。 In order to achieve the above object, a hub seal according to claim 1 of the present invention seals an annular space between two relatively rotating members, and is fitted to a slinger fitted to one member and another member. In a hub seal provided with an annular member to be joined and a seal main body portion made of a rubber-like elastic body adhered to the annular member, the slinger is a first cylindrical portion fitted to the one member; The seal body including a flange portion extending in a radial direction from an end portion of the first cylindrical portion, and a second cylindrical portion extending in an axial direction from the end portion of the flange portion, and bonded to the cylindrical portion of the annular member Protrusions extending in the axial direction formed on the peripheral surface of the fixed sealing portion of the part are slidably in close contact with the peripheral surface of the second cylindrical portion , and a plurality of the protrusions are arranged in the circumferential direction, etc. The plurality of protrusions are formed at intervals, and each of the plurality of protrusions is provided in the second cylinder. Further, the protrusions are formed so that the dust side portion has rigidity lower than that of the oil side portion, and the dust side portion is arranged in a direction to scrape dust during rotation. that it is a tiltable and is characterized in.

また、本発明の請求項２に係るハブシールは、請求項１に記載のハブシールにおいて、前記突起部は、その軸方向と直交する面で裁断した断面が、矩形形状、三角形状若しくは半円形状であることを特徴とするものである。 A hub seal according to a second aspect of the present invention is the hub seal according to the first aspect, wherein the protrusion has a rectangular, triangular or semicircular cross section cut along a plane perpendicular to the axial direction thereof. It is characterized by being.

本発明は、以下の効果を奏する。   The present invention has the following effects.

すなわち、上記構成を備えた本発明のハブシールは、シール本体部の固定密封部の周面に形成された軸方向に延びる突起部がスリンガに形成された第二円筒部の周面と摺動自在に密接しているので、回転時の遠心力による振り切り効果によりダスト側からのダストがシール内部に侵入するのを防止することができる。 That is, the hub seal of the present invention having the above-described configuration is slidable with the peripheral surface of the second cylindrical portion in which the protruding portion formed in the axial direction formed on the peripheral surface of the fixed sealing portion of the seal body portion is formed on the slinger. Therefore, the dust from the dust side can be prevented from entering the inside of the seal due to the effect of swinging off due to the centrifugal force during rotation .

更に、固定密封部の周面に突起部を形成するだけで、第二円筒部に摺動自在に密接するシールリップが増加していないので、ハブシール全体が径方向に延びるのを防止することができ、ハブシールの装着スペースが拡張するのを防止することができる。   Furthermore, since only the protrusions are formed on the peripheral surface of the fixed sealing portion, the seal lip that is slidably brought into close contact with the second cylindrical portion is not increased, so that the entire hub seal can be prevented from extending in the radial direction. It is possible to prevent the hub seal mounting space from being expanded.

また、突起部のダスト側の剛性がオイル側より低くなるように成形されているので、回転した場合にダストが掻き出される方向に突起部のダスト側部分が傾斜し、ダストの排出効果をより一層高めることができる。 Further, the rigidity of the dust side of the protrusion is shaped so as to be lower than the oil side, the dust portion of the projection is inclined in a direction in which dust Ru scraped when rotating, the effect of discharging dust It can be further increased.

以下に図面を参照して、この発明の好適な実施の形態を例示して説明する。   Preferred embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明の第一実施例に係るハブシールの要部断面を示しており、このハブシール１は、スリンガ２と、環状部材３と、シール本体部４を備えている。   FIG. 1 shows a cross section of the main part of a hub seal according to a first embodiment of the present invention. The hub seal 1 includes a slinger 2, an annular member 3, and a seal body 4.

スリンガ２は、金属製の板金で成形されていて、内輪（一の部材）に嵌合する第一円筒部２１と、第一円筒部２１のダスト側Ｂ端部から外径方向に延びるフランジ部２２と、フランジ部２２の外径端部からオイル側Ａに延びる第二円筒部２３と、を備えていて、断面略コの字形状をしている。   The slinger 2 is formed of a metal sheet metal and has a first cylindrical portion 21 that fits into an inner ring (one member), and a flange portion that extends from the dust side B end of the first cylindrical portion 21 in the outer diameter direction. 22 and a second cylindrical portion 23 extending from the outer diameter end portion of the flange portion 22 to the oil side A, and has a substantially U-shaped cross section.

環状部材３は、金属製の板金で成形されていて、外輪（他の部材）に嵌合する円筒部３１と、円筒部３１のオイル側Ａ端部から内径方向に延びるフランジ部３２からなり、断面略Ｌ字形状をし、スリンガ２と対向している。   The annular member 3 is formed of a metal sheet metal, and includes a cylindrical portion 31 fitted into an outer ring (other member), and a flange portion 32 extending in the inner diameter direction from the oil side A end portion of the cylindrical portion 31, It has a substantially L-shaped cross section and faces the slinger 2.

シール本体部４は、ゴム状弾性体で成形されていて、環状部材３のフランジ部３２に接着しているシール部４１と、環状部材３の円筒部３１に接着している固定密封部５１と、が一体に成形されている。   The seal body portion 4 is formed of a rubber-like elastic body, and includes a seal portion 41 bonded to the flange portion 32 of the annular member 3 and a fixed seal portion 51 bonded to the cylindrical portion 31 of the annular member 3. Are integrally formed.

シール部４１は、フランジ部３２の端部からオイル側Ａに延びスリンガ２の第一円筒部２１に摺動自在に密接する第一シールリップ４２と、ダスト側Ｂに延びスリンガ２の第一円筒部２１に摺動自在に密接する第二シールリップ４３と、外径方向に延びスリンガ２のフランジ部２２に摺動自在に密接するサイドシールリップ４４とが一体で成形されている。 The seal portion 41 extends from the end of the flange portion 32 to the oil side A, and a first seal lip 42 slidably in close contact with the first cylinder portion 21 of the slinger 2, and extends to the dust side B and the first cylinder of the slinger 2. A second seal lip 43 slidably contacting the portion 21 and a side seal lip 44 extending in the outer diameter direction and slidably contacting the flange portion 22 of the slinger 2 are integrally formed.

固定密封部５１は、環状部材３の円筒部３１中央よりダスト側Ｂで縮径している小径円筒部３３の外径側に接着している外径側固定密封部５２と、円筒部３１の内径側に接着している内径側固定密封部５３とが一体で成形されている。図２に示す通り、内径側固定密封部５３のスリンガ側周面５４には、径方向に突出するとともに軸方向に延びる突起部６１が周方向に等間隔に形成されていて、スリンガ２の第二円筒部２３と摺動自在に密接するようになっている。突起部６１は、その軸方向と直交する面で裁断した断面が矩形形状で軸と平行に、しかもダスト側部分６２の剛性がオイル側部分６３より低くなるように形成されているので、ハウジングが回転した場合に、ダストが掻き出される方向にダスト側部分６２が傾斜するようになっている。 The fixed sealing portion 51 includes an outer diameter side fixed sealing portion 52 bonded to the outer diameter side of the small diameter cylindrical portion 33 that is reduced in diameter on the dust side B from the center of the cylindrical portion 31 of the annular member 3, and the cylindrical portion 31. An inner diameter side fixed sealing portion 53 bonded to the inner diameter side is integrally formed. As shown in FIG. 2, on the slinger side peripheral surface 54 of the inner diameter side fixed sealing portion 53, protruding portions 61 that protrude in the radial direction and extend in the axial direction are formed at equal intervals in the circumferential direction. The two cylindrical portions 23 are slidably in close contact with each other. The protrusion 61 has a rectangular cross section cut by a plane orthogonal to the axial direction thereof, is parallel to the shaft, and is formed so that the dust side portion 62 has lower rigidity than the oil side portion 63. when rotated, the dust portion 62 is adapted to tilt in the direction in which the dust Ru scraped.

したがって、上記構成のハブシール１のスリンガ２を内輪に、環状部材３を外輪に各々嵌合させて、内輪と外輪とで形成する環状空間にハブシール１を装着した場合、環状部材３の円筒部３１の内径側に接着している内径側固定密封部５３のスリンガ側周面５４に形成されている突起部６１がスリンガ２の第二円筒部２３と摺動自在に密封するので、遠心力による振り切り効果によりダスト側Ｂからのダスト等がハブシール１内部Ｍに侵入するのを防止することが可能となる。 Therefore, when the slinger 2 of the hub seal 1 configured as described above is fitted to the inner ring and the annular member 3 is fitted to the outer ring, and the hub seal 1 is mounted in the annular space formed by the inner ring and the outer ring, the cylindrical portion 31 of the annular member 3 is provided. since collision raised portion 61 that is formed on the slinger side peripheral surface 54 of the inner diameter side fixing sealing portion 53 of adhering to the inner diameter side seal slidably and second cylindrical portion 23 of the slinger 2, by centrifugal force It is possible to prevent dust or the like from the dust side B from entering the inside M of the hub seal 1 by the swing-off effect .

また、内径側固定密封部５３のスリンガ側周面５４に突起部６１を形成するだけで更にシールリップが増加しないので、ハブシール１全体が径方向に延びるのを防止することが可能となり、ハブシール１の装着スペースが拡張するのを防止することが可能となる。   Further, since the seal lip is not increased only by forming the protrusion 61 on the slinger side peripheral surface 54 of the inner diameter side fixed sealing portion 53, it is possible to prevent the hub seal 1 from extending in the radial direction. It is possible to prevent the mounting space of the device from expanding.

更に、内径側固定密封部５３のスリンガ側周面５４に形成された突起部６１は、ダスト側部分６２の剛性がオイル側部分６３より低いので、外輪が回転したときに、図３に示すように、突起部６１のダスト側部分６２がダスト等を掻き出す方向に傾斜させることが可能となる。   Further, the protrusion 61 formed on the slinger side peripheral surface 54 of the inner diameter side fixed sealing portion 53 is lower in rigidity of the dust side portion 62 than the oil side portion 63. Therefore, when the outer ring rotates, as shown in FIG. In addition, the dust side portion 62 of the protrusion 61 can be inclined in the direction of scraping dust and the like.

なお、上記の実施例では、外輪が回転する場合について説明したが、図４の第二実施例に示すように、内輪が回転する場合であっても良い。また、スリンガ２が内輪に嵌合し環状部材３が外輪に嵌合している場合について説明したが、図５の第三実施例及び図６の第４実施例に示すように、逆にスリンガ２が外輪に嵌合し環状部材３が内輪に嵌合している場合であっても良い。なお、この場合においても、第三実施例に示すように外輪が回転してもよく、第四実施例に示すように内輪が回転しても良い。   In the above embodiment, the case where the outer ring rotates has been described. However, as shown in the second embodiment of FIG. 4, the inner ring may rotate. Further, the case where the slinger 2 is fitted to the inner ring and the annular member 3 is fitted to the outer ring has been described. However, as shown in the third embodiment of FIG. 5 and the fourth embodiment of FIG. 2 may be fitted to the outer ring and the annular member 3 may be fitted to the inner ring. In this case as well, the outer ring may rotate as shown in the third embodiment, and the inner ring may rotate as shown in the fourth embodiment.

また、突起部６１の形状は、断面が矩形形状である場合について説明したが、図７に示すような三角形状や、図８に示すような半円形状であっても良い。 Further, the shape of the protrusion 61 has been described with respect to the case where the cross section is a rectangular shape, but it may be a triangular shape as shown in FIG. 7 or a semicircular shape as shown in FIG .

なお、突起部６１は回転時にダスト側部６２がダストを掻き出す方向に傾斜することができるように、静止時には内輪と平行で傾斜していないことが良い。しかし、突起部６１を静止時に内輪に対して所定の角度を設定して傾斜させるときには、その設定角度は、逆回転時にダスト側部分６２が回転により生じる傾斜で突起部６１が内輪と平行になる範囲が良い。   In addition, it is good for the protrusion part 61 not to incline in parallel with an inner ring | wheel at the time of stationary so that the dust side part 62 can incline in the direction which scrapes off dust at the time of rotation. However, when the protrusion 61 is inclined at a predetermined angle with respect to the inner ring when stationary, the setting angle is an inclination generated by the rotation of the dust side portion 62 during reverse rotation, and the protrusion 61 becomes parallel to the inner ring. The range is good.

本発明の第一実施例に係るハブシールの断面図Sectional drawing of the hub seal which concerns on 1st Example of this invention 本発明の第一実施例に係る突起部の静止時の斜視図The perspective view at the time of the rest of the projection concerning the 1st example of the present invention 本発明の第一実施例に係る突起部の回転時の斜視図The perspective view at the time of rotation of the projection part which concerns on 1st Example of this invention 本発明の第二実施例に係るハブシールの断面図Sectional drawing of the hub seal which concerns on 2nd Example of this invention. 本発明の第三実施例に係るハブシールの断面図Sectional drawing of the hub seal which concerns on 3rd Example of this invention. 本発明の第四実施例に係るハブシールの断面図Sectional drawing of the hub seal which concerns on 4th Example of this invention. 突起部の突起形状２の斜視図Perspective view of the protrusion shape 2 of the protrusion 突起部の突起形状３の斜視図Perspective view of the protrusion shape 3 of the protrusion 従来例１に係るハブシールの断面図Sectional view of hub seal according to Conventional Example 1 従来例２に係るハブシールの断面図Sectional view of hub seal according to Conventional Example 2

符号の説明Explanation of symbols

１ ハブシール
２ スリンガ
２１，２３，３１，３３ 円筒部
２２，３２ フランジ部
３ 環状部材
４ シール本体部
４１ シール部
４２，４３，４４ シールリップ
５１，５２，５３ 固定密封部
５４ スリンガ側周面
６１ 突起部
６２ ダスト側部分
６３ オイル側部分
Ａ オイル側
Ｂ ダスト側
Ｍ シール内部 DESCRIPTION OF SYMBOLS 1 Hub seal 2 Slinger 21, 23, 31, 33 Cylindrical part 22, 32 Flange part 3 Annular member 4 Seal body part 41 Seal part 42, 43, 44 Seal lip 51, 52, 53 Fixed sealing part 54 Slinger side peripheral surface 61 Protrusion Part 62 Dust side part 63 Oil side part A Oil side B Dust side M Inside seal

Claims (2)

相対回転する二部材間の環状空間をシールするものであって、
一の部材に嵌合するスリンガと、他の部材に嵌合する環状部材と、該環状部材に接着しているゴム状弾性体よりなるシール本体部と、を備えたハブシールにおいて、
前記スリンガは、前記一の部材に嵌合している第一円筒部と、該第一円筒部の端部から径方向に延びるフランジ部と、該フランジ部の端部から軸方向に延びる第二円筒部を備え、
前記環状部材の円筒部に接着している前記シール本体部の固定密封部の周面に形成された軸方向に延びる突起部が、前記第二円筒部の周面と摺動自在に密接しており、
前記突起部は、複数が円周方向に等間隔に形成されていて、この複数の突起部がそれぞれ前記第二円筒部の周面と摺動自在に密接し、
更に前記突起部はそれぞれ、そのダスト側部分の剛性がオイル側部分の剛性よりも低く形成されていて、回転時にダストを掻き出す方向に前記ダスト側部分が傾斜可能とされていることを特徴とするハブシール。 Sealing the annular space between two relatively rotating members,
In a hub seal provided with a slinger that fits into one member, an annular member that fits into another member, and a seal body made of a rubber-like elastic body that is bonded to the annular member,
The slinger includes a first cylindrical portion fitted to the one member, a flange portion extending in a radial direction from an end portion of the first cylindrical portion, and a second portion extending in an axial direction from the end portion of the flange portion. With a cylindrical part,
An axially extending protrusion formed on the peripheral surface of the fixed sealing portion of the seal main body bonded to the cylindrical portion of the annular member is slidably in close contact with the peripheral surface of the second cylindrical portion. And
A plurality of the protrusions are formed at equal intervals in the circumferential direction, and the plurality of protrusions are slidably in close contact with the peripheral surface of the second cylindrical part,
Further, each of the projections is formed such that the rigidity of the dust side portion is lower than the rigidity of the oil side portion, and the dust side portion can be inclined in the direction of scraping the dust during rotation. Hub seal. 請求項１に記載のハブシールにおいて、
前記突起部は、その軸方向と直交する面で裁断した断面が、矩形形状、三角形状若しくは半円形状であることを特徴とするハブシール。 The hub seal according to claim 1,
The hub seal according to claim 1 , wherein a cross section of the protrusion portion cut along a plane orthogonal to the axial direction is rectangular, triangular, or semicircular .
JP2005303872A 2005-10-19 2005-10-19 Hub seal Active JP4706834B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2014224550A (en) * 2013-05-15 2014-12-04 株式会社ジェイテクト Sealing device, rolling bearing, and wheel rolling bearing
EP3851691A1 (en) * 2017-10-13 2021-07-21 NOK Corporation Sealing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0710630U (en) * 1993-07-16 1995-02-14 エヌオーケー株式会社 Sealing device
JPH0740127Y2 (en) * 1990-05-28 1995-09-13 エヌオーケー株式会社 Oil seal
JP2002364665A (en) * 2001-06-05 2002-12-18 Nsk Ltd Needle bearing for universal joint
JP2005240894A (en) * 2004-02-26 2005-09-08 Nok Corp Sealing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0740127Y2 (en) * 1990-05-28 1995-09-13 エヌオーケー株式会社 Oil seal
JPH0710630U (en) * 1993-07-16 1995-02-14 エヌオーケー株式会社 Sealing device
JP2002364665A (en) * 2001-06-05 2002-12-18 Nsk Ltd Needle bearing for universal joint
JP2005240894A (en) * 2004-02-26 2005-09-08 Nok Corp Sealing device

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