JP2019132325A - Sealing device - Google Patents

Sealing device Download PDF

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JP2019132325A
JP2019132325A JP2018014231A JP2018014231A JP2019132325A JP 2019132325 A JP2019132325 A JP 2019132325A JP 2018014231 A JP2018014231 A JP 2018014231A JP 2018014231 A JP2018014231 A JP 2018014231A JP 2019132325 A JP2019132325 A JP 2019132325A
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spring
groove
mounting groove
lip
spring mounting
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JP7191518B2 (en
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学 有泉
Manabu Ariizumi
学 有泉
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Nok Corp
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Nok Corp
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Priority to JP2018014231A priority Critical patent/JP7191518B2/en
Priority to CN201910061168.6A priority patent/CN110094508A/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
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • 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
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials

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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)

Abstract

To provide a sealing device having a structure in which a garter spring hardly comes off from a spring attachment groove which is formed at a lip head part of a seal lip.SOLUTION: A sealing device has a seal lip 31 in which a spring attachment groove 34 is formed at a lip head part 33, a garter spring 41 attached into the spring attachment groove 34, and an adhesive 51 applied on an opening part 34a of the spring attachment groove 34. The garter spring 41 is fixed to the seal lip 31 by an adhesion property of the adhesive 51. The adhesive 51 is applied over the whole periphery of the spring attachment groove 34, or applied on a part of a circumference of the spring attachment groove 34. The spring attachment groove 34 is formed as a groove which is opened at an axial end face 33a of the lip head part 33 by having an internal peripheral side groove inner face for holding the garter spring 41 from its internal peripheral side, an external peripheral side groove inner face for holding the garter spring 41 from its external peripheral side, and a groove bottom face for connecting both the groove inner faces.SELECTED DRAWING: Figure 1

Description

本発明は、シール技術に係る密封装置に関する。   The present invention relates to a sealing device according to a sealing technique.

例えば、鉄鋼用圧延機は一般に、鋼板を通過させながら圧延加工する一対のワークロールと、圧延加工時にワークロールが変形するのを抑制するバックアップロールとを有しており、これらのロールはそれぞれ、ロール両端に配置する軸箱（チョック：ベアリングとオイルシールを収納する鉄箱）によって回転可能に保持されている。   For example, a steel rolling mill generally has a pair of work rolls that are rolled while passing a steel plate, and a backup roll that suppresses deformation of the work roll during rolling, each of these rolls being It is rotatably held by shaft boxes (chock: iron box that contains bearings and oil seals) arranged at both ends of the roll.

軸箱に収納されるオイルシールは、圧延加工時に鋼板へ吹き付ける圧延水や圧延油がベアリング内へ侵入するのを抑制する役割と、ベアリング内の潤滑剤（油やグリース）が鋼板に付着しないよう軸箱外部へ漏れるのを抑制する役割とを有している。   The oil seal stored in the axle box has a role to prevent rolling water and rolling oil sprayed on the steel plate during rolling processing from entering the bearing and to prevent lubricant (oil and grease) in the bearing from adhering to the steel plate. It has a role of suppressing leakage to the outside of the axle box.

そのため、オイルシールは、軸箱の内部側と外部側とでそれぞれ密封対象へ向けて組み付ける必要があり、よって通常、図３に示すように単一のシールリップ１０２を備えるオイルシール１０１を複数個使いで使用することや、或いは図４に示すように複数のシールリップ１０２，１０３を備えるオイルシール１０１を使用することが行われている。   Therefore, it is necessary to assemble the oil seals toward the objects to be sealed on the inner side and the outer side of the axle box, respectively. Therefore, usually, a plurality of oil seals 101 each having a single seal lip 102 are provided as shown in FIG. The oil seal 101 including a plurality of seal lips 102 and 103 as shown in FIG. 4 is used.

特開２００１−２０５３１４号公報JP 2001-205314 A

しかしながら、圧延機としてラインによっては周速２０ｍ／ｓ前後の高速で作動するものがあり、この場合、高速によるシールリップ１０２，１０３の発熱対策のため、剛性の低い柔らかなシールリップ１０２，１０３を備えるオイルシール１０１を使用することが多い。   However, depending on the line, some rolling mills operate at a high speed of around 20 m / s, and in this case, soft seal lips 102 and 103 with low rigidity are used to prevent heat generation of the seal lips 102 and 103 at a high speed. The oil seal 101 provided is often used.

したがって、このように剛性の低いシールリップ１０２，１０３を備えるオイルシール１０１を使用することで、組付け時シールリップ１０２，１０３と軸が干渉した際、シールリップ１０２，１０３からガータばね１０４が外れやすい問題（ばね外れの問題）が生じることがある。   Therefore, by using the oil seal 101 having the seal lips 102 and 103 with low rigidity in this way, the garter spring 104 is detached from the seal lips 102 and 103 when the shaft interferes with the seal lips 102 and 103 during assembly. Easy problems (problems of spring failure) may occur.

このばね外れの問題は、軸の面取りや挿入の方向、スピード、芯出し等も影響するため対策が困難であるが、オイルシール１０１の機能に大きく影響するため、何らかの対策が必要とされる。   This problem of spring disengagement is difficult to take due to the influence of shaft chamfering, insertion direction, speed, centering, and the like, but since it greatly affects the function of the oil seal 101, some countermeasure is required.

尚、図３または図４のオイルシール１０１では、シールリップ１０２，１０３のリップ頭部１０４の外周面１０４ａに開口するように環状のばね装着溝１０５が設けられ、このばね装着溝１０５に環状のガータばね１０６が非接着の状態で嵌合されている。したがってリップ頭部１０４が径方向に変位したときに上記ばね外れの問題が生じやすい。   3 or 4, an annular spring mounting groove 105 is provided so as to open to the outer peripheral surface 104a of the lip head 104 of the seal lips 102, 103, and the spring mounting groove 105 has an annular shape. The garter spring 106 is fitted in a non-bonded state. Therefore, when the lip head 104 is displaced in the radial direction, the problem of the spring detachment is likely to occur.

本発明は以上の点に鑑みて、シールリップのリップ頭部に設けたばね装着溝からガータばねが外れにくい構造の密封装置を提供することを課題とする。   This invention makes it a subject to provide the sealing device of a structure where it is hard to remove | deviate from a spring mounting groove provided in the lip head part of the seal lip in view of the above point.

上記課題を解決するため、本発明の密封装置は、リップ頭部にばね装着溝を設けたシールリップと、前記ばね装着溝に装着されたガータばねと、前記ばね装着溝の開口部に塗布された接着剤とを有し、前記接着剤の接着性により前記ガータばねを前記シールリップに固定したことを特徴とする。   In order to solve the above problems, a sealing device of the present invention is applied to a seal lip provided with a spring mounting groove in a lip head, a garter spring mounted in the spring mounting groove, and an opening of the spring mounting groove. The garter spring is fixed to the seal lip by the adhesiveness of the adhesive.

また、実施の態様として、上記記載の密封装置において、前記接着剤は、前記ばね装着溝の全周に亙って塗布されていることを特徴とする。   As an embodiment, in the sealing device described above, the adhesive is applied over the entire circumference of the spring mounting groove.

また、実施の態様として、上記記載の密封装置において、前記接着剤は、前記ばね装着溝の円周上一部に塗布されていることを特徴とする。   As an embodiment, in the sealing device described above, the adhesive is applied to a part of the circumference of the spring mounting groove.

また、実施の態様として、上記記載の密封装置において、前記ばね装着溝は、前記ガータばねをその内周側から保持する内周側の溝内面、前記ガータばねをその外周側から保持する外周側の溝内面、および前記両溝内面を繋ぐ溝底面を備えることにより、前記リップ頭部の軸方向端面に開口する溝として設けられていることを特徴とする。   Moreover, as an aspect, in the sealing device described above, the spring mounting groove includes an inner circumferential groove inner surface that holds the garter spring from the inner circumferential side, and an outer circumferential side that holds the garter spring from the outer circumferential side. By providing a groove inner surface and a groove bottom surface connecting the groove inner surfaces, the groove is provided as a groove that opens on the axial end surface of the lip head.

本発明では、ばね装着溝の開口部に接着剤が塗布され、この接着剤の接着性によりガータばねをシールリップに固定するため、シールリップのリップ頭部に設けたばね装着溝からガータばねが外れにくい。したがって、ばね装着溝からガータばねが外れるばね外れの問題を抑制・解消することが可能とされる。   In the present invention, an adhesive is applied to the opening of the spring mounting groove, and the garter spring is detached from the spring mounting groove provided on the lip head of the seal lip in order to fix the garter spring to the seal lip by the adhesiveness of the adhesive. Hateful. Therefore, it is possible to suppress and eliminate the problem of spring disengagement in which the garter spring is disengaged from the spring mounting groove.

本発明の実施の形態に係る密封装置の要部断面図Sectional drawing of the principal part of the sealing device which concerns on embodiment of this invention 同密封装置におけるばね装着溝にガータばねを装着する以前の状態を示す要部断面図Cross-sectional view of relevant parts showing a state before the garter spring is mounted in the spring mounting groove in the sealing device. 従来例に係る密封装置の要部断面図Sectional drawing of the principal part of the sealing device concerning a prior art example 他の従来例に係る密封装置の装着状態を示す要部断面図Sectional drawing of the principal part which shows the mounting state of the sealing device which concerns on another prior art example

図１および図２は、実施の形態に係る密封装置の要部断面を示している。当該実施の形態に係る密封装置は、鉄鋼用圧延機における軸箱にベアリングと共に収納されるオイルシールとして用いられるものであって、圧延加工時に鋼板へ吹き付ける圧延水や圧延油がベアリング内へ侵入するのを抑制する役割と、ベアリング内の潤滑剤（油やグリース）が鋼板に付着しないように軸箱外部へ漏れるのを抑制する役割とを有している。   1 and 2 show a cross-sectional view of a main part of the sealing device according to the embodiment. The sealing device according to the embodiment is used as an oil seal housed together with a bearing in a shaft box in a steel rolling mill, and rolling water and rolling oil sprayed on a steel sheet during rolling process enter the bearing. And the role of suppressing leakage of the lubricant (oil or grease) in the bearing to the outside of the axle box so as not to adhere to the steel plate.

オイルシール１は、軸箱におけるシールハウジングの内周側に取り付けられる環状の取付部１１を有し、この取付部１１の内周側に環状の連結部（シールリップ保持部）２１を介して、軸８１の外周面に摺動可能に接触する環状のシールリップ３１が設けられ、シールリップ３１におけるリップ頭部３３に環状のばね装着溝３４が設けられ、ばね装着溝３４に、リップ頭部３３を軸８１の外周面に押し付けるための環状のガータばね４１が装着され、ばね装着溝３４の開口部３４ａに接着剤５１が塗布され、接着剤５１の接着性によりガータばね４１がシールリップ３１に固定されている。   The oil seal 1 has an annular attachment portion 11 attached to the inner peripheral side of the seal housing in the axle box, and an annular connection portion (seal lip holding portion) 21 is provided on the inner peripheral side of the attachment portion 11. An annular seal lip 31 slidably contacting the outer peripheral surface of the shaft 81 is provided. An annular spring mounting groove 34 is provided in the lip head 33 of the seal lip 31, and the lip head 33 is provided in the spring mounting groove 34. Is attached to the opening 34 a of the spring mounting groove 34, and the adhesion of the adhesive 51 causes the garter spring 41 to be applied to the seal lip 31. It is fixed.

また、オイルシール１はその構成部品として、金属環６１と、この金属環６１に被着（架橋接着）されたゴム状弾性体７１とを有し、このゴム状弾性体７１によってシールリップ３１が成形され、シールリップ３１のリップ頭部３３にばね装着溝３４が設けられ、ばね装着溝３４にガータばね４１が装着され、ばね装着溝３４の開口部３４ａに接着剤５１が塗布され、接着剤５１の接着性によりガータばね４１がシールリップ３１に固定されている。   The oil seal 1 includes a metal ring 61 and a rubber-like elastic body 71 attached (cross-linked and bonded) to the metal ring 61 as component parts. The spring mounting groove 34 is formed in the lip head 33 of the seal lip 31, the garter spring 41 is mounted in the spring mounting groove 34, and the adhesive 51 is applied to the opening 34 a of the spring mounting groove 34. The garter spring 41 is fixed to the seal lip 31 by the adhesive property of 51.

金属環６１は、シールハウジングの内周側に嵌合される筒状部６２と、この筒状部６２の軸方向一方（図では下方）の端部から径方向内方へ向けて一体成形されたフランジ部６３とを一体に有している。筒状部６２は取付部１１の一部とされ、フランジ部６３は連結部２１の一部とされている。筒状部６２の軸方向他方（図では上方）の端部には、径方向内方へ向けて屈曲された屈曲部６４が設けられていても良い。   The metal ring 61 is integrally formed from a cylindrical portion 62 fitted to the inner peripheral side of the seal housing and an axially one end (downward in the drawing) of the cylindrical portion 62 inward in the radial direction. The flange portion 63 is integrally provided. The cylindrical part 62 is a part of the attachment part 11, and the flange part 63 is a part of the connecting part 21. A bent portion 64 that is bent inward in the radial direction may be provided at the other axial end (upward in the drawing) of the cylindrical portion 62.

ゴム状弾性体７１は、金属環６１の筒状部６２の内周面に被着された内周面被着部７２と、フランジ部６３の軸方向他方の端面（内側端面）に被着された端面被着部７３とを一体に有し、この端面被着部７３の内周端部から軸方向一方へ向けてシールリップ３１が一体成形されている。内周面被着部７２は取付部１１の一部とされ、端面被着部７３は連結部２１の一部とされている。   The rubber-like elastic body 71 is attached to the inner peripheral surface attached portion 72 attached to the inner peripheral surface of the cylindrical portion 62 of the metal ring 61 and the other end surface (inner end surface) in the axial direction of the flange portion 63. The end face adhering portion 73 is integrally formed, and the seal lip 31 is integrally formed from the inner peripheral end portion of the end surface adhering portion 73 toward one side in the axial direction. The inner peripheral surface adherent portion 72 is a part of the attachment portion 11, and the end face adherend portion 73 is a part of the connecting portion 21.

シールリップ３１は、端面被着部７３の内周端部から軸方向一方へ向けて連続するリップ腰部３２とリップ頭部３３とを一体に有し、リップ頭部３３の内周面に、軸８１の外周面に摺動可能に接触するリップ摺動部（リップ先端部）３５が設けられている。   The seal lip 31 integrally includes a lip waist portion 32 and a lip head portion 33 which are continuous from the inner peripheral end portion of the end face attaching portion 73 toward one side in the axial direction. A lip sliding portion (lip tip portion) 35 that is slidably in contact with the outer peripheral surface of 81 is provided.

また、このリップ摺動部３５の外周側に位置して、リップ頭部３３にばね装着溝３４が設けられている。ばね装着溝３４はその機能からしてバネホルダー部とも称される。   Further, a spring mounting groove 34 is provided in the lip head 33 located on the outer peripheral side of the lip sliding portion 35. The spring mounting groove 34 is also referred to as a spring holder portion because of its function.

ばね装着溝３４は、リップ頭部３３の外周面３３ａではなく、リップ頭部３３の軸方向端面（軸方向先端面）３３ｂに開口するように設けられている。   The spring mounting groove 34 is provided so as to open not to the outer peripheral surface 33a of the lip head 33 but to the axial end surface (axial front end surface) 33b of the lip head 33.

このため、ばね装着溝３４は、当該ばね装着溝３４に装着したガータばね４１をその内周側から保持する内周側の溝内面３４ｂ（図２）と、ガータばね４１をその外周側から保持する外周側の溝内面３４ｃ（図２）と、両溝内面３４ｂ，３４ｃを繋ぐ溝底面３４ｄ（図２）とを備え、これによりリップ頭部３３の軸方向端面３３ｂに開口部３４ａを設けた溝として設けられている。両溝内面３４ｂ，３４ｃおよび溝底面３４ｄは、連続する断面円弧状の曲面として形成されているが、その断面形状は特に限定されるものではない。   For this reason, the spring mounting groove 34 holds an inner circumferential groove inner surface 34b (FIG. 2) for holding the garter spring 41 mounted in the spring mounting groove 34 from the inner peripheral side, and holds the garter spring 41 from the outer peripheral side. A groove inner surface 34 c (FIG. 2) on the outer peripheral side and a groove bottom surface 34 d (FIG. 2) connecting both groove inner surfaces 34 b and 34 c, thereby providing an opening 34 a on the axial end surface 33 b of the lip head 33. It is provided as a groove. Both the groove inner surfaces 34b and 34c and the groove bottom surface 34d are formed as curved surfaces having a continuous arcuate cross section, but the cross sectional shape is not particularly limited.

また、ばね装着溝３４は、このようにリップ頭部３３の軸方向端面３３ａに開口するように設けられているので、軸方向へ向けて延びる溝深さｄを備えており、この溝深さｄはガータばね１４の線径Ｄよりも大きく設定されている。したがってガータばね４１はその軸方向の一部ではなく全部がばね装着溝３４内に収容された状態でばね装着溝３４に装着されている。リップ頭部３３は、ガータばね１４をその外周側から覆う庇状のばね覆い部３７を備えることになる。   Further, since the spring mounting groove 34 is provided so as to open to the axial end surface 33a of the lip head 33, the spring mounting groove 34 has a groove depth d extending in the axial direction. d is set larger than the wire diameter D of the garter spring 14. Accordingly, the garter spring 41 is mounted in the spring mounting groove 34 in a state where the garter spring 41 is housed in the spring mounting groove 34 instead of a part thereof in the axial direction. The lip head 33 includes a hook-shaped spring cover portion 37 that covers the garter spring 14 from the outer peripheral side.

また、ばね装着溝３４は、溝奥部における溝幅（最大幅）ｗ１よりも開口部３４ａにおける溝幅ｗ２のほうが小さく設定されている。開口部３４ａにおける溝幅ｗ２はガータばね４１の線径Ｄよりも小さく設定されている。リップ頭部３３は、その軸方向端面（軸方向先端面）３３ｂに開口するばね装着溝３４を内外周の境として、リップ摺動部３５を有する頭部本体３６と庇状のばね覆い部３７とを備え、さらに頭部本体３６の軸方向端部外周面に位置して、ガータばね１４を軸方向に抜け止めする突起状のばね抜け止め部３８を備えることになる。 The spring mounting groove 34 is set smaller towards the groove width w 2 at the opening 34a than the groove width (maximum width) w 1 in Mizooku unit. The groove width w 2 in the opening 34 a is set smaller than the wire diameter D of the garter spring 41. The lip head 33 has a head main body 36 having a lip sliding portion 35 and a hook-shaped spring cover portion 37 with a spring mounting groove 34 opened in an axial end surface (axial front end surface) 33b as an inner / outer boundary. And a protruding spring retaining portion 38 that is located on the outer peripheral surface of the axial end portion of the head body 36 and that prevents the garter spring 14 from slipping in the axial direction.

接着剤５１は、ばね装着溝３４にガータばね４１を装着してから次の工程で、ばね装着溝３４の開口部３４ａに塗布されている。接着剤５１は塗布後、固化することにより接着性を発揮し、この接着性によりガータばね４１をシールリップ３１に固定している。接着剤５１は、ばね装着溝３４の開口部３４ａに塗布され、シールリップ３１およびガータばね４１の双方に対し塗布され付着することによりガータばね４１をシールリップ３１に固定している。接着剤５１は、ばね装着溝３４の開口部３４ａに塗布され、ばね装着溝３４に流し込まれて充填されることによりガータばね４１をシールリップ３１に固定している。   The adhesive 51 is applied to the opening 34 a of the spring mounting groove 34 in the next step after mounting the garter spring 41 in the spring mounting groove 34. The adhesive 51 exhibits adhesiveness by solidifying after application, and the garter spring 41 is fixed to the seal lip 31 by this adhesiveness. The adhesive 51 is applied to the opening 34 a of the spring mounting groove 34, and is applied to and adhered to both the seal lip 31 and the garter spring 41, thereby fixing the garter spring 41 to the seal lip 31. The adhesive 51 is applied to the opening 34 a of the spring mounting groove 34, poured into the spring mounting groove 34, and filled to fix the garter spring 41 to the seal lip 31.

また、接着剤５１は、ばね装着溝３４の開口部３４ａに塗布されることにより開口部３４ａを閉塞している。接着剤５１は、ばね装着溝３４の全周に亙って開口部３４ａに塗布されることによりばね装着溝３４の開口部３４ａを全周に亙って閉塞している。   The adhesive 51 closes the opening 34 a by being applied to the opening 34 a of the spring mounting groove 34. The adhesive 51 is applied to the opening 34a over the entire circumference of the spring mounting groove 34, thereby closing the opening 34a of the spring mounting groove 34 over the entire circumference.

接着剤５１の具体例としては、エポキシ系やシリコン系の樹脂（接着剤）などが使用されている。   As a specific example of the adhesive 51, an epoxy-based or silicon-based resin (adhesive) or the like is used.

上記構成を備えるオイルシール１においては、シールリップ３１のリップ頭部３３に設けたばね装着溝３４の開口部３４ａに接着剤５１が塗布され、この接着剤５１の接着性によりガータばね４１がシールリップ３１に固定されているため、ばね装着溝３４からガータばね４１が外れにくく、ばね装着溝３４からガータばね４１が外れることがない。したがって、ばね装着溝３４からガータばね４１が外れるばね外れの問題を抑制・解消することが可能とされ、よってオイルシール１の安定したシール性を確保することができる。   In the oil seal 1 having the above configuration, the adhesive 51 is applied to the opening 34a of the spring mounting groove 34 provided in the lip head 33 of the seal lip 31. 31, the garter spring 41 is not easily detached from the spring mounting groove 34, and the garter spring 41 is not detached from the spring mounting groove 34. Therefore, it is possible to suppress / eliminate the problem of spring disengagement in which the garter spring 41 is disengaged from the spring mounting groove 34, thereby ensuring stable sealing performance of the oil seal 1.

また、接着剤５１がばね装着溝３４の全周に亙って開口部３４ａに塗布されることによりばね装着溝３４の開口部３４ａが全周に亙って閉塞されているため、圧延水や圧延油、潤滑剤、ダスト等の密封対象がばね装着溝３４内へ侵入するのを防止することが可能とされている。   Further, since the adhesive 51 is applied to the opening 34a over the entire circumference of the spring mounting groove 34, the opening 34a of the spring mounting groove 34 is closed over the entire circumference, so that It is possible to prevent sealing objects such as rolling oil, lubricant, and dust from entering the spring mounting groove 34.

尚、接着剤５１は、これをばね装着溝３４の円周上一部で開口部３４ａに塗布するようにしても良く（例えば、円周上複数個所で塗布するなど）、この場合には接着剤５１の塗布量が少ないため、接着剤５１によってガータばね４１の動き（伸縮作動）が阻害されにくいと云う利点が生じる。   The adhesive 51 may be applied to the opening 34a at a part of the circumference of the spring mounting groove 34 (for example, applied at a plurality of locations on the circumference). Since the application amount of the agent 51 is small, there is an advantage that the movement (extension operation) of the garter spring 41 is not easily inhibited by the adhesive 51.

また、上記構成を備えるオイルシール１においては、ばね装着溝３４が内周側の溝内面３４ｂ、外周側の溝内面３４ｃおよび溝底面３４ｄを備えることによりリップ頭部３３の軸方向端面３３ｂに開口する溝として設けられているために、以下の作用効果が発揮される。   In the oil seal 1 having the above configuration, the spring mounting groove 34 is provided with an inner circumferential groove inner surface 34b, an outer circumferential groove inner surface 34c, and a groove bottom surface 34d, thereby opening the lip head 33 in the axial end surface 33b. Since it is provided as a groove to perform, the following effects are exhibited.

すなわち、比較例として、ばね装着溝３４がリップ頭部３３の外周面３３ａに開口する溝として設けられている場合は、ばね装着溝３４にガータばね４１を装着する際にガータばね４１がリップ頭部３３の先端部外周側を乗り越えるようにガータばね４１を弾性的に拡径させるか或いはシールリップ３１を弾性変形させてばね装着溝３４を径方向内方へ変位させるかする必要があるため、装着作業が面倒である。これに対し、ばね装着溝３４がリップ頭部３３の軸方向端面３３ｂに開口する溝として設けられている場合には、ばね装着溝３４にガータばね４１を装着する際にガータばね４１がリップ頭部３３の先端部外周側を乗り越えなくても良いため、ガータばね４１を弾性的に拡径させたり或いはシールリップ３１を弾性変形させてばね装着溝３４を径方向内方へ変位させたりする必要がない。したがって、ばね装着溝３４にガータばね４１を装着する装着作業の作業性を向上することができる。   That is, as a comparative example, when the spring mounting groove 34 is provided as a groove opening on the outer peripheral surface 33 a of the lip head 33, the garter spring 41 is attached to the lip head when the garter spring 41 is mounted in the spring mounting groove 34. Since it is necessary to elastically expand the garter spring 41 so as to get over the outer peripheral side of the distal end portion of the portion 33 or to elastically deform the seal lip 31 to displace the spring mounting groove 34 radially inwardly. Installation work is troublesome. On the other hand, when the spring mounting groove 34 is provided as a groove opening in the axial end surface 33 b of the lip head 33, the garter spring 41 is attached to the lip head when the garter spring 41 is mounted in the spring mounting groove 34. Since it is not necessary to climb over the outer peripheral side of the tip portion of the portion 33, it is necessary to elastically expand the garter spring 41 or to elastically deform the seal lip 31 to displace the spring mounting groove 34 radially inward. There is no. Therefore, the workability of the mounting work of mounting the garter spring 41 in the spring mounting groove 34 can be improved.

また、比較例として、ばね装着溝３４がリップ頭部３３の外周面３３ａに開口する溝として設けられている場合は、ばね装着溝３４の開口部３４ａに接着剤５１を塗布する際に、塗布した接着剤５１がリップ頭部３３の外周面３３ａからリップ腰部３２の外周面のほうへ流出しやすいため、接着剤５１がリップ腰部３２の外周面で固化することによりシールリップ３１の剛性が変化してしまうことがある。これに対し、ばね装着溝３４がリップ頭部３３の軸方向端面３３ｂに開口する溝として設けられている場合には、ばね装着溝３４の開口部３４ａに接着剤５１を塗布する際に、塗布した接着剤５１がリップ頭部３３の軸方向端面３３ｂにとどまって、この軸方向端面３３ｂとはほぼ直角をなすリップ頭部３３の外周面３３ａのほうへ伝わりにくいため、接着剤５１がリップ頭部３３の外周面３３ａからリップ腰部３２の外周面のほうへ流出しにくい。したがって、接着剤５１がリップ腰部３２の外周面で固化することによりシールリップ３１の剛性が変化するのを未然に防止することができる。   As a comparative example, when the spring mounting groove 34 is provided as a groove opening on the outer peripheral surface 33 a of the lip head 33, it is applied when the adhesive 51 is applied to the opening 34 a of the spring mounting groove 34. Since the adhesive 51 thus easily flows out from the outer peripheral surface 33a of the lip head 33 toward the outer peripheral surface of the lip waist portion 32, the rigidity of the seal lip 31 changes as the adhesive 51 solidifies on the outer peripheral surface of the lip waist portion 32. May end up. On the other hand, when the spring mounting groove 34 is provided as a groove opening in the axial end surface 33b of the lip head 33, the application is performed when the adhesive 51 is applied to the opening 34a of the spring mounting groove 34. The adhesive 51 stays on the axial end surface 33b of the lip head 33 and is hardly transmitted to the outer peripheral surface 33a of the lip head 33 which is substantially perpendicular to the axial end surface 33b. It is difficult for the outer peripheral surface 33 a of the portion 33 to flow out toward the outer peripheral surface of the lip waist portion 32. Therefore, it is possible to prevent the rigidity of the seal lip 31 from changing due to the adhesive 51 solidifying on the outer peripheral surface of the lip waist portion 32.

１ オイルシール
１１ 取付部
２１連結部
３１ シールリップ
３２ リップ腰部
３３ リップ頭部
３３ａ 外周面
３３ｂ 軸方向端面
３４ ばね装着溝
３４ａ 開口部
３４ｂ，３４ｃ 溝内面
３４ｄ 溝底面
３５ リップ摺動部
３６ 頭部本体
３７ ばね覆い部
３８ ばね抜け止め部
４１ ガータばね
５１ 接着剤
６１ 金属環
６２ 筒状部
６３ フランジ部
６４ 屈曲部
７１ ゴム状弾性体
７２ 内周面被着部
７３ 端面被着部 DESCRIPTION OF SYMBOLS 1 Oil seal 11 Mounting part 21 Connection part 31 Seal lip 32 Lip waist part 33 Lip head 33a Outer peripheral surface 33b Axial direction end surface 34 Spring mounting groove 34a Opening part 34b, 34c Groove inner surface 34d Groove bottom face 35 Lip sliding part 36 Head body 37 Spring cover portion 38 Spring retaining portion 41 Garter spring 51 Adhesive 61 Metal ring 62 Cylindrical portion 63 Flange portion 64 Bending portion 71 Rubber elastic body 72 Inner peripheral surface adhering portion 73 End face adhering portion

Claims (4)

リップ頭部にばね装着溝を設けたシールリップと、前記ばね装着溝に装着されたガータばねと、前記ばね装着溝の開口部に塗布された接着剤とを有し、
前記接着剤の接着性により前記ガータばねを前記シールリップに固定したことを特徴とする密封装置。 A seal lip provided with a spring mounting groove in the lip head; a garter spring mounted in the spring mounting groove; and an adhesive applied to an opening of the spring mounting groove;
The sealing device, wherein the garter spring is fixed to the seal lip by the adhesive property of the adhesive. 請求項１記載の密封装置において、
前記接着剤は、前記ばね装着溝の全周に亙って塗布されていることを特徴とする密封装置。 The sealing device according to claim 1.
The sealing device according to claim 1, wherein the adhesive is applied over the entire circumference of the spring mounting groove. 請求項１記載の密封装置において、
前記接着剤は、前記ばね装着溝の円周上一部に塗布されていることを特徴とする密封装置。 The sealing device according to claim 1.
The sealing device, wherein the adhesive is applied to a part of the circumference of the spring mounting groove. 請求項１、２または３記載の密封装置において、
前記ばね装着溝は、前記ガータばねをその内周側から保持する内周側の溝内面、前記ガータばねをその外周側から保持する外周側の溝内面、および前記両溝内面を繋ぐ溝底面を備えることにより、前記リップ頭部の軸方向端面に開口する溝として設けられていることを特徴とする密封装置。 The sealing device according to claim 1, 2 or 3,
The spring mounting groove includes an inner groove inner surface that holds the garter spring from the inner peripheral side, an outer groove inner surface that holds the garter spring from the outer peripheral side, and a groove bottom surface that connects the inner surfaces of both grooves. By providing, it is provided as a groove | channel opened to the axial direction end surface of the said lip head, The sealing device characterized by the above-mentioned.
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KR20210019225A (en) * 2019-08-12 2021-02-22 평화오일씰공업주식회사 Spring-less oil seal
CN113531123A (en) * 2021-08-09 2021-10-22 南京利德东方橡塑科技有限公司 Bearing seal with support finger spring

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CN113531123A (en) * 2021-08-09 2021-10-22 南京利德东方橡塑科技有限公司 Bearing seal with support finger spring

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