JP2018059559A - Seal and seal mechanism - Google Patents

Seal and seal mechanism Download PDF

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Publication number
JP2018059559A
JP2018059559A JP2016196077A JP2016196077A JP2018059559A JP 2018059559 A JP2018059559 A JP 2018059559A JP 2016196077 A JP2016196077 A JP 2016196077A JP 2016196077 A JP2016196077 A JP 2016196077A JP 2018059559 A JP2018059559 A JP 2018059559A
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Japan
Prior art keywords
seal
peripheral surface
shaft member
outer peripheral
sleeve portion
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JP2016196077A
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JP6782600B2 (en
Inventor
康展 小笠原
Yasunobu Ogasawara
康展 小笠原
直生 桃井
Tadao Momoi
直生 桃井
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Nabtesco Corp
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Nabtesco Corp
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Priority to JP2016196077A priority Critical patent/JP6782600B2/en
Priority to TW106131137A priority patent/TWI725228B/en
Priority to KR1020170122295A priority patent/KR102437869B1/en
Priority to DE102017217136.7A priority patent/DE102017217136A1/en
Priority to CN201710890636.1A priority patent/CN107893852B/en
Publication of JP2018059559A publication Critical patent/JP2018059559A/en
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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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
    • F16J15/3212—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings with metal springs
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Of Bearings (AREA)
  • Seal Device For Vehicle (AREA)
  • Glass Compositions (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide seal technique which can be properly applied to a device requiring miniaturization.SOLUTION: A seal of this invention includes: a seal member surrounding a prescribed rotating shaft; and a slinger having a sleeve slid with the seal member, and a flange protruded toward the rotating shaft from the sleeve.SELECTED DRAWING: Figure 1

Description

本発明は、装置内に収容された流体の流出や装置内への流体の流入を防ぐためのシール技術に関する。   The present invention relates to a sealing technique for preventing outflow of fluid contained in a device and inflow of fluid into the device.

シールは、様々な技術分野で利用される。シールが組み込まれた装置が、高速で回転するならば、或いは、メンテナンス作業なしで、長期間に亘って稼動されるならば、シールと装置の表面との間の境界での高い耐摩耗性が要求される。シールが組み込まれた装置が、腐食性の気体或いは液体が充満する環境下で使用されるならば、シールと装置の表面との間での高い耐腐食性が要求される。特許文献１は、高い耐摩耗性及び／又は耐腐食性が要求される使用環境下で好適に利用され得る技術を開示する。   Seals are used in various technical fields. If the device incorporating the seal rotates at high speeds or if it is operated over a long period of time without maintenance work, high wear resistance at the interface between the seal and the surface of the device is achieved. Required. If the device incorporating the seal is used in an environment filled with corrosive gases or liquids, high corrosion resistance between the seal and the surface of the device is required. Patent Document 1 discloses a technique that can be suitably used in a use environment where high wear resistance and / or corrosion resistance is required.

特許文献１は、シール部材とシール部材に取り囲まれたスリンガとを有するシールを開示する。スリンガは、シャフトを取り囲むスリーブと、シャフトを取り囲むハウジングに向けて折り曲げられたフランジと、を含む。フランジは、スリンガの剛性を向上させるので、作業者が、シールを装置に組み込むときにシールに力を加えても、シールは、変形しにくい。   Patent Document 1 discloses a seal having a seal member and a slinger surrounded by the seal member. The slinger includes a sleeve that surrounds the shaft and a flange that is bent toward the housing that surrounds the shaft. Since the flange improves the rigidity of the slinger, even if an operator applies a force to the seal when incorporating the seal into the apparatus, the seal is not easily deformed.

特開２０１６−８４９１１号公報Japanese Patent Laid-Open No. 2006-84911

特許文献１の技術は、フランジとハウジングとの間の接触を回避するために、大型のハウジングを必要とする。したがって、特許文献１の技術は、小型化を要求される装置には不向きである。   The technique of Patent Document 1 requires a large housing in order to avoid contact between the flange and the housing. Therefore, the technique of Patent Document 1 is not suitable for an apparatus that requires downsizing.

本発明は、小型化を要求される装置に好適に適用可能なシール技術を提供することを目的とする。   An object of the present invention is to provide a sealing technique that can be suitably applied to an apparatus that is required to be downsized.

本発明の一局面に係るシールは、所定の回転軸を取り巻くシール部材と、前記シール部材によって摺接されるスリーブ部と、前記スリーブ部から前記回転軸に向けて突出するフランジ部と、を含むスリンガと、を備える。   A seal according to one aspect of the present invention includes a seal member that surrounds a predetermined rotation shaft, a sleeve portion that is slidably contacted by the seal member, and a flange portion that protrudes from the sleeve portion toward the rotation shaft. And a slinger.

上記の構成によれば、シール部材は、スリーブ部と摺接するので、設計者は、スリーブ部に高い耐摩耗性及び／又は耐腐食性を有する材料を用いることによって、摩耗及び／腐食に強いシールを形成することができる。フランジ部は、スリーブ部から回転軸に向けて突出するので、フランジ部は、シールの外径寸法を増加させない。このことは、シール部材を取り囲む装置のハウジングの内径が、小さな値に設定され得ることを意味する。したがって、シールは、小型化を要求される装置に好適に組み込まれ得る。   According to the above configuration, since the seal member is in sliding contact with the sleeve portion, the designer uses a material having high wear resistance and / or corrosion resistance for the sleeve portion to thereby seal against wear and / or corrosion. Can be formed. Since the flange portion protrudes from the sleeve portion toward the rotating shaft, the flange portion does not increase the outer diameter of the seal. This means that the inner diameter of the housing of the device surrounding the sealing member can be set to a small value. Therefore, the seal can be suitably incorporated in a device that is required to be downsized.

本発明の他の局面に係るシール機構は、上述のシールと、前記スリーブ部によって囲まれる外周面を有するシャフト部材と、を備える。前記フランジ部は、前記外周面から凹設された凹部に収容される。   A seal mechanism according to another aspect of the present invention includes the above-described seal and a shaft member having an outer peripheral surface surrounded by the sleeve portion. The flange portion is accommodated in a recess that is recessed from the outer peripheral surface.

上記の構成によれば、フランジ部は、スリーブ部によって囲まれた外周面から凹設された凹部に収容されるので、設計者は、シャフト部材の表面からのフランジ部の突出量を非常に小さな値に設定することができる。この結果、シール機構が構築された装置は、回転軸の延設方向において、小さな長さ寸法を有することができる。加えて、フランジ部が凹部に収容される結果、シャフト部材とスリンガとの間の位置関係は略一定になる。すなわち、フランジ部は、シャフト部材に対するスリンガの位置決め機能を有することができる。したがって、スリンガは、シャフト部材に精度よく取り付けられる。   According to said structure, since a flange part is accommodated in the recessed part recessed from the outer peripheral surface enclosed by the sleeve part, a designer is very small in the protrusion amount of the flange part from the surface of a shaft member. Can be set to a value. As a result, the device in which the seal mechanism is constructed can have a small length dimension in the extending direction of the rotating shaft. In addition, as a result of the flange portion being housed in the recess, the positional relationship between the shaft member and the slinger is substantially constant. That is, the flange portion can have a slinger positioning function with respect to the shaft member. Therefore, the slinger is attached to the shaft member with high accuracy.

上記の構成に関して、前記シール部材は、前記スリーブ部に押しつけられるメインリップを含んでもよい。前記メインリップは、前記回転軸に対して直交する仮想平面上において、前記フランジ部と重なってもよい。   With regard to the above configuration, the seal member may include a main lip pressed against the sleeve portion. The main lip may overlap the flange portion on a virtual plane orthogonal to the rotation axis.

上記の構成によれば、メインリップは、スリーブ部に押しつけられるので、スリーブ部とメインリップとの間の境界を通じた流体の流通は生じにくい。メインリップは、回転軸に対して直交する仮想平面上において、フランジ部と重なるので、設計者は、メインリップの端面からのフランジ部の突出量を非常に小さな値に設定することができる。この結果、シール機構が構築された装置は、回転軸の延設方向において、小さな長さ寸法を有することができる。   According to the above configuration, since the main lip is pressed against the sleeve portion, fluid does not easily flow through the boundary between the sleeve portion and the main lip. Since the main lip overlaps the flange portion on a virtual plane orthogonal to the rotation axis, the designer can set the protrusion amount of the flange portion from the end surface of the main lip to a very small value. As a result, the device in which the seal mechanism is constructed can have a small length dimension in the extending direction of the rotating shaft.

上述のシール技術は、小型化を要求される装置に好適に適用可能である。   The above-described sealing technique can be suitably applied to an apparatus that is required to be downsized.

例示的なシール機構の概略的な断面図である。2 is a schematic cross-sectional view of an exemplary sealing mechanism. FIG.

図１は、例示的なシール機構１００の概略的な断面図である。図１を参照して、シール機構１００が説明される。   FIG. 1 is a schematic cross-sectional view of an exemplary sealing mechanism 100. The sealing mechanism 100 will be described with reference to FIG.

シール機構１００は、シール２００と、シャフト部材３００と、ハウジング４００と、を備える。シール２００、シャフト部材３００及びハウジング４００は、装置の一部を形成する。装置は、減速機であってもよいし、他の装置であってもよい。本実施形態の原理は、シール機構１００が構築される特定の装置に限定されない。   The seal mechanism 100 includes a seal 200, a shaft member 300, and a housing 400. Seal 200, shaft member 300 and housing 400 form part of the apparatus. The device may be a speed reducer or another device. The principle of this embodiment is not limited to a specific device in which the seal mechanism 100 is constructed.

シャフト部材３００は、所定の回転軸ＲＡＸ上に配置される。シャフト部材３００は、円柱状の部材であってもよいし、円筒状の部材であってもよい。本実施形態の原理は、シャフト部材３００の特定の形状に限定されない。   The shaft member 300 is disposed on a predetermined rotation axis RAX. The shaft member 300 may be a columnar member or a cylindrical member. The principle of the present embodiment is not limited to a specific shape of the shaft member 300.

回転軸ＲＡＸは、シャフト部材３００の中心軸に相当する。ハウジング４００は、シャフト部材３００と略同軸である。シャフト部材３００及びハウジング４００のうち少なくとも一方は、回転軸ＲＡＸ周りに回転する。すなわち、シャフト部材３００が、固定されているならば、ハウジング４００は、回転軸ＲＡＸ周りに回転してもよい。ハウジング４００が、固定されているならば、シャフト部材３００は、回転軸ＲＡＸ周りに回転してもよい。   The rotation axis RAX corresponds to the central axis of the shaft member 300. The housing 400 is substantially coaxial with the shaft member 300. At least one of the shaft member 300 and the housing 400 rotates around the rotation axis RAX. That is, if the shaft member 300 is fixed, the housing 400 may rotate around the rotation axis RAX. If the housing 400 is fixed, the shaft member 300 may rotate around the rotation axis RAX.

ハウジング４００は、シャフト部材３００が部分的に収容される内部空間を形成する。装置の一部として用いられる様々な部品が、ハウジング４００の内部空間に更に収容されてもよい。たとえば、シャフト部材３００に連結された歯車部品が、ハウジング４００内に配置されてもよい。   The housing 400 forms an internal space in which the shaft member 300 is partially accommodated. Various components used as part of the apparatus may be further accommodated in the interior space of the housing 400. For example, a gear component connected to the shaft member 300 may be disposed in the housing 400.

シール２００は、上述の内部空間を、ハウジング４００の外側の外部空間から仕切る。シャフト部材３００及びハウジング４００は、内部空間と外部空間との間の境界に環状の空間を形成する。シール２００は、環状の空間に嵌め込まれる。   The seal 200 partitions the above-described internal space from the external space outside the housing 400. The shaft member 300 and the housing 400 form an annular space at the boundary between the internal space and the external space. The seal 200 is fitted in an annular space.

シャフト部材３００は、シール２００によって密着される外周面３１０を含む。シール性の接着剤は、外周面３１０に塗布され、接着層ＡＨＬを形成する。ハウジング４００は、シャフト部材３００の外周面３１０と協働してシール２００を挟む内周面４１０を含む。上述の環状の空間は、外周面３１０と内周面４１０との間に形成される。   The shaft member 300 includes an outer peripheral surface 310 that is in close contact with the seal 200. The sealing adhesive is applied to the outer peripheral surface 310 to form the adhesive layer AHL. The housing 400 includes an inner peripheral surface 410 that sandwiches the seal 200 in cooperation with the outer peripheral surface 310 of the shaft member 300. The annular space described above is formed between the outer peripheral surface 310 and the inner peripheral surface 410.

シール２００は、シール部材２１０と、スリンガ２２０と、を含む。シール部材２１０は、ハウジング４００の内周面４１０に全体的に当接される外周面を有するリング状の部材である。シール部材２１０は、回転軸ＲＡＸを取り囲む。回転軸ＲＡＸは、シール部材２１０の中心軸に相当する。   The seal 200 includes a seal member 210 and a slinger 220. The seal member 210 is a ring-shaped member having an outer peripheral surface that is entirely in contact with the inner peripheral surface 410 of the housing 400. The seal member 210 surrounds the rotation axis RAX. The rotation axis RAX corresponds to the central axis of the seal member 210.

スリンガ２２０は、円筒状のスリーブ部２２１と、スリーブ部２２１の内端（すなわち、内部空間に現れる端部）から屈曲され、回転軸ＲＡＸに向けて突出するフランジ部２２２と、を含む。スリーブ部２２１は、全周に亘って、シール部材２１０とシャフト部材３００とによって挟まれる。   The slinger 220 includes a cylindrical sleeve portion 221 and a flange portion 222 that is bent from the inner end of the sleeve portion 221 (that is, the end portion that appears in the inner space) and protrudes toward the rotation axis RAX. The sleeve portion 221 is sandwiched between the seal member 210 and the shaft member 300 over the entire circumference.

スリーブ部２２１は、内周面２２３と、内周面２２３とは反対側の外周面２２４と、を含む。スリーブ部２２１の内周面２２３は、接着層ＡＨＬによって、シャフト部材３００の外周面３１０に全体的に接着される。したがって、シャフト部材３００の外周面３１０は、スリーブ部２２１によって囲まれる。シャフト部材３００及びハウジング４００のうち少なくとも一方が回転している間、スリーブ部２２１の外周面２２４は、シール部材２１０によって摺接される。   The sleeve portion 221 includes an inner peripheral surface 223 and an outer peripheral surface 224 opposite to the inner peripheral surface 223. The inner peripheral surface 223 of the sleeve portion 221 is entirely bonded to the outer peripheral surface 310 of the shaft member 300 by the adhesive layer AHL. Therefore, the outer peripheral surface 310 of the shaft member 300 is surrounded by the sleeve portion 221. While at least one of the shaft member 300 and the housing 400 is rotating, the outer peripheral surface 224 of the sleeve portion 221 is slidably contacted by the seal member 210.

シャフト部材３００の外周面３１０から回転軸ＲＡＸに向けて凹没するリング状の凹部３２０が、シャフト部材３００に形成される。シャフト部材３００は、回転軸ＲＡＸに直交する仮想平面ＰＬＮに沿うリング状の第１面３２１を含む。シャフト部材３００は、第１面３２１の内周縁から内部空間に向けて、回転軸ＲＡＸに略平行に延びる母線によって形成される第２面３２２を更に含む。凹部３２０は、第１面３２１と第２面３２２とによって部分的に囲まれる空間である。   A ring-shaped recess 320 that is recessed from the outer peripheral surface 310 of the shaft member 300 toward the rotation axis RAX is formed in the shaft member 300. The shaft member 300 includes a ring-shaped first surface 321 along a virtual plane PLN orthogonal to the rotation axis RAX. The shaft member 300 further includes a second surface 322 formed by a generatrix extending substantially parallel to the rotation axis RAX from the inner peripheral edge of the first surface 321 toward the inner space. The recess 320 is a space partially surrounded by the first surface 321 and the second surface 322.

フランジ部２２２は、凹部３２０に相補的である。フランジ部２２２は、凹部３２０に収容される。   The flange portion 222 is complementary to the recess 320. The flange portion 222 is accommodated in the recess 320.

シャフト部材３００は、第２面３２２から回転軸ＲＡＸに向けて屈曲し、且つ、第１面３２１に略平行な第３面３２３を含む。図１に示される仮想平面ＰＬＮは、第１面３２１と第３面３２３との間で定義されている。図１は、凹部３２０の幅Ｗを示す。幅Ｗは、回転軸ＲＡＸの延設方向における第１面３２１と第３面３２３との間の距離として定義されてもよいし、第２面３２２を形成する母線の長さとして定義されてもよい。フランジ部２２２の厚さは、幅Ｗと等しくてもよいし、幅Ｗよりも小さくてもよい。この場合、フランジ部２２２は、回転軸ＲＡＸの延設方向において、第３面３２３から突出しない。この結果、ハウジング４００によって囲まれた内部空間は、様々な部品の配置のために有効に利用される。このことは、シール機構１００が構築された装置の軸長寸法（すなわち、回転軸ＲＡＸの延設方向における装置の寸法）の低減に貢献する。   The shaft member 300 includes a third surface 323 that is bent from the second surface 322 toward the rotation axis RAX and is substantially parallel to the first surface 321. The virtual plane PLN shown in FIG. 1 is defined between the first surface 321 and the third surface 323. FIG. 1 shows the width W of the recess 320. The width W may be defined as the distance between the first surface 321 and the third surface 323 in the extending direction of the rotation axis RAX, or may be defined as the length of the bus forming the second surface 322. Good. The thickness of the flange portion 222 may be equal to the width W or may be smaller than the width W. In this case, the flange portion 222 does not protrude from the third surface 323 in the extending direction of the rotation shaft RAX. As a result, the internal space surrounded by the housing 400 is effectively used for arranging various components. This contributes to a reduction in the axial length dimension of the apparatus in which the seal mechanism 100 is constructed (that is, the dimension of the apparatus in the extending direction of the rotating shaft RAX).

シール部材２１０は、主リング部２１１と、環状のメインリップ２１２と、環状のダストリップ２１３と、スプリングリング２１４と、を含む。主リング部２１１は、第１部分２１５と、第２部分２１６と、を含む。第１部分２１５は、回転軸ＲＡＸに略一致する中心軸を有する円筒状の部位である。第１部分２１５の外周面は、ハウジング４００の内周面４１０に略全体的に当接される。第２部分２１６は、第１部分２１５の外端（すなわち、外部空間に現れる端部）から屈曲し、回転軸ＲＡＸに向けて突出するリング状の部位である。第２部分２１６は、スリーブ部２２１の外周面２２４に対向する内周端２１７を含む。ダストリップ２１３及びメインリップ２１２は、内周端２１７に接続される。   Seal member 210 includes a main ring portion 211, an annular main lip 212, an annular dust 213, and a spring ring 214. The main ring portion 211 includes a first portion 215 and a second portion 216. The first portion 215 is a cylindrical portion having a central axis substantially coinciding with the rotation axis RAX. The outer peripheral surface of the first portion 215 is substantially in contact with the inner peripheral surface 410 of the housing 400. The second portion 216 is a ring-shaped portion that is bent from the outer end of the first portion 215 (that is, the end portion that appears in the outer space) and protrudes toward the rotation axis RAX. The second portion 216 includes an inner peripheral end 217 that faces the outer peripheral surface 224 of the sleeve portion 221. The dust 213 and the main lip 212 are connected to the inner peripheral end 217.

ダストリップ２１３は、主リング部２１１の内周端２１７から外部空間及び回転軸ＲＡＸに向けて斜めに突出する。ダストリップ２１３は、外部空間で浮遊する塵埃といった異物が内部空間に侵入することを防ぐために用いられる。   The dust 213 protrudes obliquely from the inner peripheral end 217 of the main ring portion 211 toward the external space and the rotation axis RAX. The dust strip 213 is used to prevent foreign matters such as dust floating in the external space from entering the internal space.

ダストリップ２１３の先端は、スリーブ部２２１の外周面２２４に当接する。シャフト部材３００及びハウジング４００のうち少なくとも一方が回転している間、ダストリップ２１３の先端は、スリーブ部２２１に擦れる。スリンガ２２０は、シャフト部材３００よりも耐摩耗性に優れた材料から形成されるので、スリーブ部２２１へのダストリップ２１３の摺接下においても、スリンガ２２０は、ほとんど摩耗しない。   The tip of the dust lip 213 contacts the outer peripheral surface 224 of the sleeve portion 221. While at least one of the shaft member 300 and the housing 400 rotates, the tip of the dust strip 213 rubs against the sleeve portion 221. Since the slinger 220 is made of a material having higher wear resistance than the shaft member 300, the slinger 220 hardly wears even under sliding contact of the dust strip 213 with the sleeve portion 221.

メインリップ２１２は、圧接リング２１８と、連結リング２１９と、を含む。圧接リング２１８は、ダストリップ２１３と内部空間との間で、スリーブ部２２１の外周面２２４に当接する。連結リング２１９は、圧接リング２１８を、主リング部２１１の内周端２１７に連結させる。   The main lip 212 includes a pressure contact ring 218 and a connection ring 219. The pressure contact ring 218 abuts on the outer peripheral surface 224 of the sleeve portion 221 between the dust 213 and the internal space. The connection ring 219 connects the pressure contact ring 218 to the inner peripheral end 217 of the main ring portion 211.

スプリングリング２１４は、圧接リング２１８に取り付けられる。圧接リング２１８を取り囲むスプリングリング２１４は、回転軸ＲＡＸに向かう力を、圧接リング２１８の全周に亘って、圧接リング２１８に加える。この結果、圧接リング２１８は、スリーブ部２２１の外周面２２４に密着され、圧接リング２１８とスリーブ部２２１の外周面２２４との間の境界にシール構造が形成される。内部空間に収容された液体（たとえば、潤滑液）は、圧接リング２１８とスリーブ部２２１の外周面２２４との間の境界に形成されたシール構造によって阻まれ、外部空間に漏出しない。   The spring ring 214 is attached to the pressure contact ring 218. The spring ring 214 surrounding the pressure contact ring 218 applies a force toward the rotation axis RAX to the pressure contact ring 218 over the entire circumference of the pressure contact ring 218. As a result, the pressure contact ring 218 is in close contact with the outer peripheral surface 224 of the sleeve portion 221, and a seal structure is formed at the boundary between the pressure contact ring 218 and the outer peripheral surface 224 of the sleeve portion 221. The liquid (for example, lubricating liquid) accommodated in the internal space is blocked by the seal structure formed at the boundary between the pressure contact ring 218 and the outer peripheral surface 224 of the sleeve portion 221 and does not leak to the external space.

シャフト部材３００及びハウジング４００のうち少なくとも一方が回転している間、圧接リング２１８は、スリーブ部２２１に強く擦れる。スリンガ２２０は、シャフト部材３００よりも耐摩耗性に優れた材料から形成されるので、スリーブ部２２１への圧接リング２１８の摺接下においても、スリンガ２２０は、ほとんど摩耗しない。   While at least one of the shaft member 300 and the housing 400 is rotating, the pressure contact ring 218 rubs strongly against the sleeve portion 221. Since the slinger 220 is formed of a material having higher wear resistance than the shaft member 300, the slinger 220 hardly wears even under sliding contact of the pressure contact ring 218 with the sleeve portion 221.

図１に示される如く、仮想平面ＰＬＮは、フランジ部２２２と圧接リング２１８とに重なる。このことは、幅Ｗによって表される領域が、フランジ部２２２に配設だけでなく、圧接リング２１８の配設にも利用されることを意味する。   As shown in FIG. 1, the virtual plane PLN overlaps the flange portion 222 and the pressure contact ring 218. This means that the region represented by the width W is used not only for disposing the flange portion 222 but also for disposing the press contact ring 218.

ハウジングに向けて屈曲するフランジ部を有する従来のスリンガに関して、圧接リング２１８が、幅Ｗによって表される領域へ突出するならば、フランジ部は、圧接リング２１８に干渉することになる。一方、本実施形態の原理によれば、フランジ部２２２は、回転軸ＲＡＸに向けて屈曲するので、フランジ部２２２は、圧接リング２１８に干渉しない。幅Ｗによって表される領域が、フランジ部２２２及び圧接リング２１８の配設に有効に利用されるので、設計者は、シール機構１００が構築された装置の軸長寸法（すなわち、回転軸ＲＡＸの延設方向における装置の寸法）に小さな値を与えることができる。   For a conventional slinger having a flange portion that bends toward the housing, if the pressure ring 218 protrudes into the region represented by the width W, the flange portion will interfere with the pressure ring 218. On the other hand, according to the principle of the present embodiment, the flange portion 222 bends toward the rotation axis RAX, so that the flange portion 222 does not interfere with the press contact ring 218. Since the region represented by the width W is effectively used for disposing the flange portion 222 and the pressure contact ring 218, the designer can determine the axial length dimension of the apparatus in which the seal mechanism 100 is constructed (that is, the rotation axis RAX). Small values can be given to the dimensions of the device in the extending direction.

上述の実施形態に関して、シール性を有する接着層ＡＨＬが、シール２００とシャフト部材３００の外周面３１０との間に形成され、これらの境界をシールする。しかしながら、接着層ＡＨＬに代えて、シール性を有するゴム部材が、シール２００とシャフト部材３００の外周面３１０との間に配置されてもよい。上述の実施形態の原理は、シール２００とシャフト部材３００の外周面３１０との間に配置される特定のシール性部材に限定されない。   With respect to the above-described embodiment, the adhesive layer AHL having a sealing property is formed between the seal 200 and the outer peripheral surface 310 of the shaft member 300 to seal these boundaries. However, instead of the adhesive layer AHL, a rubber member having a sealing property may be disposed between the seal 200 and the outer peripheral surface 310 of the shaft member 300. The principle of the above-described embodiment is not limited to a specific sealing member disposed between the seal 200 and the outer peripheral surface 310 of the shaft member 300.

上述の実施形態の原理は、様々な機械設備に好適に利用される。   The principle of the above-described embodiment is suitably used for various mechanical facilities.

１００・・・・・・・・・・・・・・・・・・・・・・・シール機構
２００・・・・・・・・・・・・・・・・・・・・・・・シール
２１０・・・・・・・・・・・・・・・・・・・・・・・シール部材
２１２・・・・・・・・・・・・・・・・・・・・・・・メインリップ
２２０・・・・・・・・・・・・・・・・・・・・・・・スリンガ
２２１・・・・・・・・・・・・・・・・・・・・・・・スリーブ部
２２２・・・・・・・・・・・・・・・・・・・・・・・フランジ部
３００・・・・・・・・・・・・・・・・・・・・・・・シャフト部材
３１０・・・・・・・・・・・・・・・・・・・・・・・外周面
３２０・・・・・・・・・・・・・・・・・・・・・・・凹部
ＰＬＮ・・・・・・・・・・・・・・・・・・・・・・・仮想平面
ＲＡＸ・・・・・・・・・・・・・・・・・・・・・・・回転軸 100 ... Sealing mechanism 200 ... Seal 210 ... seal member 212 ...・ Main lip 220 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Slinger 221 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ Sleeve part 222 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Flange part 300 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ Shaft member 310 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer peripheral surface 320 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・···· depression PLN ································ RAX ······················· axis of rotation

Claims (3)

所定の回転軸を取り巻くシール部材と、
前記シール部材によって摺接されるスリーブ部と、前記スリーブ部から前記回転軸に向けて突出するフランジ部と、を含むスリンガと、を備える
シール。 A seal member surrounding a predetermined rotation axis;
A slinger comprising: a sleeve portion that is slidably contacted by the seal member; and a flange portion that protrudes from the sleeve portion toward the rotation shaft. 請求項１に記載のシールと、
前記スリーブ部によって囲まれる外周面を有するシャフト部材と、を備え、
前記フランジ部は、前記外周面から凹設された凹部に収容される
シール機構。 A seal according to claim 1;
A shaft member having an outer peripheral surface surrounded by the sleeve portion,
The flange portion is housed in a recess that is recessed from the outer peripheral surface. 前記シール部材は、前記スリーブ部に押しつけられるメインリップを含み、
前記メインリップは、前記回転軸に対して直交する仮想平面上において、前記フランジ部と重なる
請求項２に記載のシール機構。 The seal member includes a main lip pressed against the sleeve portion,
The seal mechanism according to claim 2, wherein the main lip overlaps the flange portion on a virtual plane orthogonal to the rotation axis.
JP2016196077A 2016-10-04 2016-10-04 Seal and seal mechanism Active JP6782600B2 (en)

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KR1020170122295A KR102437869B1 (en) 2016-10-04 2017-09-22 Seal and seal mechanism
DE102017217136.7A DE102017217136A1 (en) 2016-10-04 2017-09-27 Seal and seal mechanism
CN201710890636.1A CN107893852B (en) 2016-10-04 2017-09-27 Seal assembly and seal mechanism

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