JP2005240894A - Sealing device - Google Patents

Sealing device Download PDF

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Publication number
JP2005240894A
JP2005240894A JP2004050799A JP2004050799A JP2005240894A JP 2005240894 A JP2005240894 A JP 2005240894A JP 2004050799 A JP2004050799 A JP 2004050799A JP 2004050799 A JP2004050799 A JP 2004050799A JP 2005240894 A JP2005240894 A JP 2005240894A
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Japan
Prior art keywords
slinger
sealing device
seal
muddy water
seal member
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JP2004050799A
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Japanese (ja)
Inventor
Shinobu Munakata
忍 宗形
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Nok Corp
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Nok Corp
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Priority to JP2004050799A priority Critical patent/JP2005240894A/en
Publication of JP2005240894A publication Critical patent/JP2005240894A/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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device 1 for draining muddy water or the like which has entered therein, by using a labyrinth seal 8 for positively making a flow for draining the muddy water out of the labyrinth seal 8 which is disposed between a slinger 2 and a seal member 3 and thereby to increase sealability. <P>SOLUTION: The sealing device 1 is constituted of the slinger 2 and the seal member 3. The slinger 2 integrally has a cylindrical mounting part 2a and an annular plain face part 2b, and the seal member 3 integrally has a cylindrical mounting part 3a and seal lips 6, 7. The labyrinth seal 8 is disposed between a radial tip part 2c of the plain face part 2b of the slinger 2, and the mounting part 3a of the seal member 3 facing the radial tip part 2c. An annular tapered part 11 or a screw is formed to the labyrinth seal 8 for draining the muddy water by using turning force. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、密封装置に関するものである。本発明の密封装置は、例えばハブベアリングシールとして自動車関連分野に用いられ、または汎用機械等に用いられる。   The present invention relates to a sealing device. The sealing device of the present invention is used, for example, in the field of automobiles as a hub bearing seal, or used in a general-purpose machine or the like.

従来から、図１２に示すように、所謂ＰＡＣタイプの密封装置１が知られており、この密封装置１は、相対回転する二部材（例えばベアリングの内輪および外輪）２１，２２のうちの一方（例えば内輪）２１に取り付けられるスリンガー２と、他方（例えば外輪）２２に取り付けられるシール部材３との組み合わせにより構成されている。スリンガー２は、金属材よりなり、筒状の取付部２ａの軸方向一端に環状の平面部２ｂを一体成形して断面略Ｌ字形に形成されており、取付部２ａをもって一方の部材（内輪）２１の外周面に嵌着されている。シール部材３は、同じく断面略Ｌ字形を呈する金属環４にゴム状弾性体５を被着したものであって、筒状の取付部３ａと、スリンガー２に摺動自在に密接するシールリップ６，７とを一体に有しており、取付部３ａをもって他方の部材（外輪）２２の内周面に嵌着されている。シールリップ６，７は、スリンガー２の取付部２ａの外周面に摺動自在に密接するメインリップ６と、スリンガー２の平面部２ｂの内側端面に摺動自在に密接するサイドリップ７とにより構成されている。また、スリンガー２における平面部２ｂの径方向先端部２ｃはシール部材３の取付部３ａの内周面と僅かな間隙ｃを介して径方向に対向しており、ここに外部Ａの泥水等のダストが密封装置１の内部Ｂに侵入するのを抑えるためのラビリンスシール８が設けられている。   Conventionally, as shown in FIG. 12, a so-called PAC-type sealing device 1 is known, and this sealing device 1 is one of two members (for example, an inner ring and an outer ring) 21 and 22 that rotate relative to each other (for example, an inner ring and an outer ring). For example, it is configured by a combination of a slinger 2 attached to the inner ring 21 and a seal member 3 attached to the other (for example, outer ring) 22. The slinger 2 is made of a metal material, and is formed into a substantially L-shaped cross section by integrally forming an annular flat portion 2b at one axial end of a cylindrical mounting portion 2a. One member (inner ring) having the mounting portion 2a. 21 is fitted on the outer peripheral surface. The seal member 3 is a member in which a rubber-like elastic body 5 is attached to a metal ring 4 having a substantially L-shaped cross section, and has a cylindrical mounting portion 3a and a seal lip 6 that is slidably in close contact with the slinger 2. , 7 are integrated with each other, and are fitted on the inner peripheral surface of the other member (outer ring) 22 with a mounting portion 3a. The seal lips 6, 7 are constituted by a main lip 6 that is slidably in contact with the outer peripheral surface of the mounting portion 2 a of the slinger 2, and a side lip 7 that is slidably intimately contacted with the inner end surface of the flat portion 2 b of the slinger 2. Has been. In addition, the radial front end 2c of the flat surface portion 2b of the slinger 2 is opposed to the inner peripheral surface of the mounting portion 3a of the seal member 3 in the radial direction with a slight gap c between them. A labyrinth seal 8 is provided to prevent dust from entering the inside B of the sealing device 1.

上記構成の密封装置１は、上記したようにスリンガー２における平面部２ｂの径方向先端部２ｃとこれに対向するシール部材３の取付部３ａとの間に泥水等のダストの侵入を抑えるラビリンスシール８が設けられているので、このラビリンスシール８によるシール機能によりある程度の耐ダスト性を発揮することが可能とされているが、そのシール能力が余り高くなく、かつ密封装置１の内部Ｂに一旦泥水等が侵入するとこれを排出することができないことから、シールリップ６，７とくに泥水と直接接触する位置にあるサイドリップ７が損傷しやすいと云う不都合がある。   As described above, the sealing device 1 having the above configuration is a labyrinth seal that suppresses intrusion of dust such as muddy water between the radial front end portion 2c of the flat surface portion 2b of the slinger 2 and the mounting portion 3a of the seal member 3 opposed thereto. 8 is provided, it is possible to exhibit a certain amount of dust resistance by the sealing function of the labyrinth seal 8, but its sealing ability is not so high, and once in the inside B of the sealing device 1. When muddy water or the like enters, it cannot be discharged, and therefore, there is a disadvantage that the side lips 7 that are in direct contact with the seal lips 6 and 7, particularly the muddy water, are easily damaged.

また、本願に対する他の従来技術として、本願出願人は先に、図１３に示すように、スリンガー２における平面部２ｂの径方向先端部２ｃとこれに対向するシール部材３の取付部３ａとの間に泥水等のダストの侵入を抑えるラビリンスシール８を設け、更にこのラビリンスシール８における取付部３ａの内周面に環状の凸部９および凹部１０を交互に並べて設けた密封装置１を提案しており、この密封装置１によれば、凸部９および凹部１０の「ラビリンス構造による流体ポンピング作用」によってシール能力を高めることができる（特許文献１参照）。   As another conventional technique for the present application, the applicant of the present application previously described, as shown in FIG. A sealing device 1 is proposed in which a labyrinth seal 8 that suppresses intrusion of dust such as muddy water is provided, and annular convex portions 9 and concave portions 10 are alternately arranged on the inner peripheral surface of the mounting portion 3a of the labyrinth seal 8. Therefore, according to the sealing device 1, the sealing ability can be enhanced by the “fluid pumping action by the labyrinth structure” of the convex portion 9 and the concave portion 10 (see Patent Document 1).

しかしながら、この先行技術に設けられているのは、泥水等の流体に流れを発生させることがない環状の凸部９や凹部１０であり、これではやはりシール能力の向上に限界があり、内部Ｂに侵入した泥水等を排出することもできない。   However, what is provided in this prior art is an annular convex part 9 or concave part 10 that does not generate a flow in a fluid such as muddy water. It is not possible to discharge muddy water and the like that have entered the ground.

実開平０７−０１０６３０号公報Japanese Utility Model Publication No. 07-010630

本発明は以上の点に鑑みて、スリンガーおよびシール部材間に設けられるラビリンスシールに泥水等を排出する流れを積極的に作り出すことができ、もってシール能力を向上させるとともに、内部に侵入した泥水等を排出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。   In view of the above points, the present invention can positively create a flow for discharging muddy water or the like to a labyrinth seal provided between a slinger and a seal member, thereby improving the sealing ability and muddy water or the like entering the inside. It aims at providing the sealing device which can discharge | emit.

上記目的を達成するため、本発明の請求項１による密封装置は、相対回転する二部材のうちの一方に取り付けられるスリンガーと他方に取り付けられるシール部材との組み合わせよりなり、前記スリンガーは筒状の取付部と環状の平面部とを一体に有し、前記シール部材は筒状の取付部と前記スリンガーに摺動自在に密接するシールリップとを一体に有し、前記スリンガーにおける平面部の径方向先端部とこれに対向する前記シール部材の取付部との間に泥水等ダストの侵入を抑えるラビリンスシールを設けてなる密封装置において、前記ラビリンスシールに、回転力により泥水を排出する環状のテーパーを設定したことを特徴とするものである。   In order to achieve the above object, a sealing device according to claim 1 of the present invention comprises a combination of a slinger attached to one of two relatively rotating members and a seal member attached to the other, wherein the slinger has a cylindrical shape. An attachment portion and an annular flat surface portion are integrally formed, and the seal member integrally has a cylindrical attachment portion and a seal lip that is slidably in close contact with the slinger, and the radial direction of the flat portion of the slinger In a sealing device provided with a labyrinth seal that suppresses intrusion of dust such as muddy water between a tip portion and a mounting portion of the seal member facing the tip portion, the labyrinth seal has an annular taper that discharges muddy water by a rotational force. It is characterized by setting.

また、本発明の請求項２による密封装置は、相対回転する二部材のうちの一方に取り付けられるスリンガーと他方に取り付けられるシール部材との組み合わせよりなり、前記スリンガーは筒状の取付部と環状の平面部とを一体に有し、前記シール部材は筒状の取付部と前記スリンガーに摺動自在に密接するシールリップとを一体に有し、前記スリンガーにおける平面部の径方向先端部とこれに対向する前記シール部材の取付部との間に泥水等ダストの侵入を抑えるラビリンスシールを設けてなる密封装置において、前記ラビリンスシールに、回転力により泥水を排出するネジを設定したことを特徴とするものである。   According to a second aspect of the present invention, there is provided a sealing device comprising a combination of a slinger attached to one of two relatively rotating members and a seal member attached to the other, wherein the slinger has a cylindrical attachment portion and an annular shape. A flat surface portion, and the seal member integrally includes a cylindrical mounting portion and a seal lip that is slidably in close contact with the slinger, and a radial tip of the flat portion of the slinger In a sealing device provided with a labyrinth seal that suppresses intrusion of dust such as muddy water between the opposing mounting portions of the seal member, the labyrinth seal is provided with a screw for discharging muddy water by rotational force. Is.

上記構成を備えた本発明の請求項１による密封装置においては、上記したようにラビリンスシールに回転力により泥水を排出する環状のテーパーを設定したために、このテーパーが回転時に遠心力によって泥水等を「振り切る」ことができる流体振り切り作用を発揮する。振り切られた流体は、テーパーに沿って放射状に飛散して流体の流れを作り、一度流れを作ると、これに連られて密封装置の内部にも流れが発生し、この流れは流体を外部へ排出するものとなる。   In the sealing device according to claim 1 of the present invention having the above-described configuration, the labyrinth seal is provided with an annular taper for discharging muddy water by rotational force as described above. Demonstrate fluid swing-off action that can be “shake-off”. The swirled fluid scatters radially along the taper to create a fluid flow.Once the flow is created, a flow is also generated inside the sealing device, and this flow moves the fluid to the outside. It will be discharged.

また、上記構成を備えた本発明の請求項２による密封装置においては、ラビリンスシールに回転力により泥水を排出するネジを設定したために、このネジが回転時に泥水等を軸方向に「流動させる」ことができる流体ポンピング作用を発揮する。このポンピング作用は、ネジの方向に沿って流体を軸方向一方へ流動させて流体の流れを積極的に作り出すものである点で、上記先行技術に係るポンピング作用とは明確に区別されるものである。ポンピングされた流体は、ネジに沿って軸方向に流動して流体の流れを作り、一度流れを作ると、これに連られて密封装置の内部にも流れが発生し、この流れは流体を外部へ排出するものとなる。   Further, in the sealing device according to claim 2 of the present invention having the above-described configuration, since the screw for discharging the muddy water by the rotational force is set in the labyrinth seal, this screw “flows” the muddy water or the like in the axial direction when rotating. It exhibits a fluid pumping action. This pumping action is clearly distinguished from the pumping action according to the prior art in that the fluid is actively produced in the axial direction by causing the fluid to flow in one axial direction along the screw direction. is there. The pumped fluid flows axially along the screw to create a fluid flow.Once the flow is created, a flow is also generated inside the sealing device, and this flow passes the fluid to the outside. Will be discharged.

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

すなわち、本発明の請求項１による密封装置においては、ラビリンスシールに設定された環状のテーパーが回転時の遠心力によって泥水等を振り切る流体振り切り作用を発揮することから、流体に排出方向へ向けての流れが発生する。したがって、このように排出方向の流れが発生することにより、ラビリンスシールのシール性能を一層向上させることができる。また、密封装置の内部に侵入した流体を排出することができることから、この点からもシール性能を向上させることができ、流体が泥水等である場合には、シールリップの耐久性を向上させることもできる。   That is, in the sealing device according to claim 1 of the present invention, the annular taper set in the labyrinth seal exerts a fluid swinging action for shaking off muddy water and the like by the centrifugal force at the time of rotation. Flow occurs. Therefore, by generating the flow in the discharge direction in this way, the sealing performance of the labyrinth seal can be further improved. In addition, since the fluid that has entered the inside of the sealing device can be discharged, the sealing performance can also be improved from this point, and when the fluid is muddy water, the durability of the sealing lip can be improved. You can also.

また、本発明の請求項２による密封装置においては、ラビリンスシールに設定されたネジが回転時に泥水等を軸方向に流動させる流体ポンピング作用を発揮することから、流体に排出方向へ向けての流れが発生する。したがって、このように排出方向の流れが発生することにより、ラビリンスシールのシール性能を一層向上させることができる。また、密封装置の内部に侵入した流体を排出することができることから、この点からもシール性能を向上させることができ、流体が泥水等である場合には、シールリップの耐久性を向上させることもできる。   Further, in the sealing device according to claim 2 of the present invention, the screw set in the labyrinth seal exerts a fluid pumping action that causes muddy water or the like to flow in the axial direction when rotating, so that the fluid flows in the discharge direction. Will occur. Therefore, by generating the flow in the discharge direction in this way, the sealing performance of the labyrinth seal can be further improved. In addition, since the fluid that has entered the inside of the sealing device can be discharged, the sealing performance can also be improved from this point, and when the fluid is muddy water, the durability of the sealing lip can be improved. You can also.

上記請求項１に係る発明における環状のテーパーと請求項２に係る発明におけるネジは、何れか一方がラビリンスシール設けられるが、双方を同時に設けることにしても良い。   One of the annular taper in the invention according to claim 1 and the screw in the invention according to claim 2 is provided with a labyrinth seal, but both may be provided simultaneously.

つぎに本発明の実施例を図面にしたがって説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

第一実施例・・・
図１は、本発明の第一実施例に係る密封装置１の要部断面図を示しており、図２は同密封装置１の要部斜視図を示している。当該第一実施例に係る密封装置１は、自動車関連分野においてハブベアリングシールとして用いられるものであって、以下のように構成されている。尚、当該実施例は請求項１に対応するものである。 First embodiment ...
FIG. 1 is a cross-sectional view of a main part of a sealing device 1 according to a first embodiment of the present invention, and FIG. The sealing device 1 according to the first embodiment is used as a hub bearing seal in an automobile-related field, and is configured as follows. This embodiment corresponds to claim 1.

すなわち先ず、当該密封装置１は、相対回転する二部材（ベアリングの内輪および外輪）のうちの一方の部材（内輪）に取り付けられるスリンガー２と、他方の部材（外輪）に取り付けられるシール部材３との組み合わせにより構成されている。スリンガー２は、板金等の金属材よりなり、筒状の取付部２ａの軸方向一端に径方向外方へ向けて環状の平面部２ｂを一体成形して断面略Ｌ字形に形成されており、取付部２ａをもって一方の部材（内輪）の外周面に嵌着される。シール部材３は、同じく断面略Ｌ字形を呈する金属環４にゴム状弾性体５を被着したものであって、筒状の取付部３ａと、スリンガー２に摺動自在に密接するシールリップ６，７とを一体に有しており、取付部３ａをもって他方の部材（外輪）の内周面に嵌着される。シールリップ６，７は、スリンガー２の取付部２ａの外周面に摺動自在に密接するメインリップ６と、スリンガー２の平面部２ｂの内側端面に摺動自在に密接するサイドリップ７とを有している。また、スリンガー２における平面部２ｂの径方向先端部２ｃはシール部材３の取付部３ａの内周面と僅かな間隙を介して径方向に対向しており、ここに外部Ａの泥水等のダストが密封装置１の内部Ｂに侵入するのを抑えるように機能するラビリンスシール８が設けられており、更にこれに加えて当該実施例では、このラビリンスシール８に、回転力により泥水を排出するように機能する環状のテーパー１１が設定されている。   That is, first, the sealing device 1 includes a slinger 2 attached to one member (inner ring) of two members (inner ring and outer ring of a bearing) that rotate relative to each other, and a seal member 3 attached to the other member (outer ring). It is comprised by the combination of. The slinger 2 is made of a metal material such as a sheet metal, and is formed into a substantially L-shaped cross section by integrally forming an annular flat portion 2b radially outward at one axial end of the cylindrical mounting portion 2a. The mounting portion 2a is fitted to the outer peripheral surface of one member (inner ring). The seal member 3 is a member in which a rubber-like elastic body 5 is attached to a metal ring 4 having a substantially L-shaped cross section, and has a cylindrical mounting portion 3a and a seal lip 6 that is slidably in close contact with the slinger 2. , 7 are integrated with each other, and the mounting portion 3a is fitted to the inner peripheral surface of the other member (outer ring). The seal lips 6, 7 have a main lip 6 that is slidably in contact with the outer peripheral surface of the mounting portion 2 a of the slinger 2, and a side lip 7 that is slidably in close contact with the inner end surface of the flat portion 2 b of the slinger 2. doing. Further, the distal end portion 2c of the flat surface portion 2b of the slinger 2 is opposed to the inner peripheral surface of the mounting portion 3a of the seal member 3 in a radial direction with a slight gap therebetween, and dust such as muddy water of the outside A is here. Is provided with a labyrinth seal 8 that functions to suppress the intrusion into the inside B of the sealing device 1, and in addition to this, in this embodiment, the labyrinth seal 8 is caused to discharge muddy water by a rotational force. An annular taper 11 is set which functions to the above.

このテーパー１１は、シール部材３における取付部３ａの内周面に形成されており、この内周面は金属環４の筒状部４ａの内周面に被着されたゴム状弾性体５によって形成されているので、テーパー１１はゴム状弾性体５の内周面に形成されている。また、テーパー１１は、密封装置１の内部Ｂから外部Ａへかけて径寸法が徐々に拡大するように形成されており、全体として漏斗面状に形成されている。   The taper 11 is formed on the inner peripheral surface of the mounting portion 3 a of the seal member 3, and this inner peripheral surface is formed by a rubber-like elastic body 5 attached to the inner peripheral surface of the cylindrical portion 4 a of the metal ring 4. Since it is formed, the taper 11 is formed on the inner peripheral surface of the rubber-like elastic body 5. Further, the taper 11 is formed so that the diameter dimension gradually increases from the inside B to the outside A of the sealing device 1, and is formed in a funnel shape as a whole.

上記構成の密封装置１のように、ラビリンスシール８に漏斗面状のテーパー１１が設定されると、このテーパー１１が回転時に遠心力によって泥水等を振り切る流体振り切り作用を発揮することから、流体に排出方向へ向けて流れが発生する。したがって、このように排出方向の流れが発生することから、ラビリンスシール８のシール性能を一層向上させることができる。また、密封装置１の内部Ｂに侵入した流体を排出することができることから、この点からもシール性能を向上させることができ、流体が泥水等である場合には、シールリップ６，７の耐久性（耐泥水性）を向上させることができる。   When the funnel surface taper 11 is set on the labyrinth seal 8 as in the sealing device 1 having the above-described configuration, the taper 11 exerts a fluid swinging-off action of shaking off muddy water or the like by centrifugal force during rotation. Flow occurs in the discharge direction. Accordingly, since the flow in the discharge direction is generated in this way, the sealing performance of the labyrinth seal 8 can be further improved. In addition, since the fluid that has entered the inside B of the sealing device 1 can be discharged, the sealing performance can be improved from this point. When the fluid is muddy water, the durability of the sealing lips 6 and 7 can be improved. (Muddy water resistance) can be improved.

上記実施例に係る密封装置１は、その構成を以下のように付加または変更しても良い。   The configuration of the sealing device 1 according to the above embodiment may be added or changed as follows.

（１）上記実施例では、ラビリンスシール８において、その外周部を構成するシール部材３における取付部３ａの内周面にテーパー１１を設定したが、これに代えて、その内周部すなわちスリンガー２における平面部２ｂの径方向先端部２ｃにテーパー１１を設定する。また、シール部材３における取付部３ａの内周面およびスリンガー２における平面部２ｂの径方向先端部２ｃの双方にテーパー１１を設定する。 (1) In the above embodiment, in the labyrinth seal 8, the taper 11 is set on the inner peripheral surface of the mounting portion 3a in the seal member 3 constituting the outer peripheral portion. Instead, the inner peripheral portion, that is, the slinger 2 A taper 11 is set at the radial front end portion 2c of the flat surface portion 2b. Further, a taper 11 is set on both the inner peripheral surface of the mounting portion 3 a in the seal member 3 and the radial front end portion 2 c of the flat surface portion 2 b in the slinger 2.

（２）図３に示すように、スリンガー２における平面部２ｂの径方向先端部２ｃに、回転影響を増大させる溝１２を設定する。溝１２は、軸方向に延びる溝またはスパイラル状の溝が円周上多数並べて設けられている。 (2) As shown in FIG. 3, the groove 12 that increases the rotational influence is set in the radial front end portion 2 c of the flat surface portion 2 b in the slinger 2. The groove 12 is provided with a large number of grooves extending in the axial direction or spiral grooves.

（３）図４に示すように、スリンガー２のシール３側から振り切られた泥水を排出させる形状とする。図では、シール部材３における取付部３ａの内周面にテーパー１１が設けられ、その内側に環状の段差１３を介して環状の第二テーパー１４が設けられている。 (3) As shown in FIG. 4, it is set as the shape which discharges the muddy water swung off from the seal 3 side of the slinger 2. In the figure, a taper 11 is provided on the inner peripheral surface of the mounting portion 3 a in the seal member 3, and an annular second taper 14 is provided on the inside via an annular step 13.

第二実施例・・・
図５は、本発明の第二実施例に係る密封装置１の要部断面図を示しており、図６は同密封装置１の要部斜視図を示している。当該第二実施例に係る密封装置１は、自動車関連分野においてハブベアリングシールとして用いられるものであって、以下のように構成されている。尚、当該実施例は請求項２に対応するものである。 Second embodiment ...
FIG. 5 shows a cross-sectional view of the main part of the sealing device 1 according to the second embodiment of the present invention, and FIG. 6 shows a perspective view of the main part of the sealing device 1. The sealing device 1 according to the second embodiment is used as a hub bearing seal in the automobile-related field, and is configured as follows. This embodiment corresponds to claim 2.

すなわち先ず、当該密封装置１は、相対回転する二部材（ベアリングの内輪および外輪）のうちの一方の部材（内輪）に取り付けられるスリンガー２と、他方の部材（外輪）に取り付けられるシール部材３との組み合わせにより構成されている。スリンガー２は、板金等の金属材よりなり、筒状の取付部２ａの軸方向一端に径方向外方へ向けて環状の平面部２ｂを一体成形して断面略Ｌ字形に形成されており、取付部２ａをもって一方の部材（内輪）の外周面に嵌着される。シール部材３は、同じく断面略Ｌ字形を呈する金属環４にゴム状弾性体５を被着したものであって、筒状の取付部３ａと、スリンガー２に摺動自在に密接するシールリップ６，７とを一体に有しており、取付部３ａをもって他方の部材（外輪）の内周面に嵌着される。シールリップ６，７は、スリンガー２の取付部２ａの外周面に摺動自在に密接するメインリップ６と、スリンガー２の平面部２ｂの内側端面に摺動自在に密接するサイドリップ７とを有している。また、スリンガー２における平面部２ｂの径方向先端部２ｃはシール部材３の取付部３ａの内周面と僅かな間隙を介して径方向に対向しており、ここに外部Ａの泥水等のダストが密封装置１の内部Ｂに侵入するのを抑えるように機能するラビリンスシール８が設けられており、更にこれに加えて当該実施例では、このラビリンスシール８に、回転力により泥水を排出するように機能するネジ１５が設定されている。   That is, first, the sealing device 1 includes a slinger 2 attached to one member (inner ring) of two members (inner ring and outer ring of a bearing) that rotate relative to each other, and a seal member 3 attached to the other member (outer ring). It is comprised by the combination of. The slinger 2 is made of a metal material such as a sheet metal, and is formed into a substantially L-shaped cross section by integrally forming an annular flat portion 2b radially outward at one axial end of the cylindrical mounting portion 2a. The mounting portion 2a is fitted to the outer peripheral surface of one member (inner ring). The seal member 3 is a member in which a rubber-like elastic body 5 is attached to a metal ring 4 having a substantially L-shaped cross section, and has a cylindrical mounting portion 3a and a seal lip 6 that is slidably in close contact with the slinger 2. , 7 are integrated with each other, and the mounting portion 3a is fitted to the inner peripheral surface of the other member (outer ring). The seal lips 6, 7 have a main lip 6 that is slidably in contact with the outer peripheral surface of the mounting portion 2 a of the slinger 2, and a side lip 7 that is slidably in close contact with the inner end surface of the flat portion 2 b of the slinger 2. doing. In addition, the radial front end 2c of the flat surface portion 2b of the slinger 2 is opposed to the inner peripheral surface of the mounting portion 3a of the seal member 3 in a radial direction with a slight gap between them. Is provided with a labyrinth seal 8 that functions to suppress the intrusion into the inside B of the sealing device 1, and in addition to this, in this embodiment, the labyrinth seal 8 is caused to discharge muddy water by a rotational force. The screw 15 that functions is set.

ネジ１５は、シール部材３における取付部３ａの内周面に形成されており、この内周面は金属環４の筒状部４ａの内周面に被着されたゴム状弾性体５によって形成されているので、ネジ１５はゴム状弾性体５の内周面に形成されている。また、ネジ１５は、スパイラル状の突起が円周上多数並べて設けられており、スパイラルの向きは回転時に流体を密封装置１の内部Ｂから外部Ａへ向けて流動させる向きとされている。   The screw 15 is formed on the inner peripheral surface of the mounting portion 3 a in the seal member 3, and this inner peripheral surface is formed by the rubber-like elastic body 5 attached to the inner peripheral surface of the cylindrical portion 4 a of the metal ring 4. Therefore, the screw 15 is formed on the inner peripheral surface of the rubber-like elastic body 5. The screw 15 is provided with a large number of spiral projections arranged on the circumference, and the direction of the spiral is such that the fluid flows from the inside B to the outside A of the sealing device 1 during rotation.

上記構成の密封装置１のように、ラビリンスシール８にスパイラル状のネジ１５が設定されると、このネジ１５が回転時に泥水等を軸方向に流動させる流体ポンピング作用を発揮することから、流体に排出方向へ向けて流れが発生する。したがって、このように排出方向の流れが発生することから、ラビリンスシール８のシール性能を一層向上させることができる。また、密封装置１の内部Ｂに侵入した流体を排出することができることから、この点からもシール性能を向上させることができ、流体が泥水等である場合には、シールリップ６，７の耐久性（耐泥水性）を向上させることができる。   When the spiral screw 15 is set in the labyrinth seal 8 as in the sealing device 1 having the above-described configuration, the screw 15 exerts a fluid pumping action to flow muddy water or the like in the axial direction during rotation. Flow occurs in the discharge direction. Accordingly, since the flow in the discharge direction is generated in this way, the sealing performance of the labyrinth seal 8 can be further improved. In addition, since the fluid that has entered the inside B of the sealing device 1 can be discharged, the sealing performance can be improved from this point. When the fluid is muddy water, the durability of the sealing lips 6 and 7 can be improved. (Muddy water resistance) can be improved.

上記実施例に係る密封装置１は、その構成を以下のように付加または変更しても良い。   The configuration of the sealing device 1 according to the above embodiment may be added or changed as follows.

（１）上記実施例では、ラビリンスシール８において、その外周部を構成するシール部材３における取付部３ａの内周面にネジ１５を設定したが、これに代えて図７に示すように、その内周部すなわちスリンガー２における平面部２ｂの径方向先端部２ｃにネジ１５を設定する。また図８に示すように、シール部材３における取付部３ａの内周面およびスリンガー２における平面部２ｂの径方向先端部２ｃの双方にネジ１５を設定する。 (1) In the above embodiment, in the labyrinth seal 8, the screw 15 is set on the inner peripheral surface of the mounting portion 3a in the seal member 3 constituting the outer peripheral portion, but instead, as shown in FIG. A screw 15 is set on the inner circumferential portion, that is, the radial front end portion 2 c of the flat surface portion 2 b in the slinger 2. Further, as shown in FIG. 8, screws 15 are set on both the inner peripheral surface of the mounting portion 3 a in the seal member 3 and the radial front end portion 2 c of the flat surface portion 2 b in the slinger 2.

（２）図９に示すように、スリンガー２における平面部２ｂの径方向先端部２ｃに、回転影響を増大させる溝１２を設定する。溝１２は、軸方向に延びる溝またはスパイラル状の溝が円周上多数並べて設けられている。 (2) As shown in FIG. 9, the groove 12 that increases the rotational influence is set in the radial front end portion 2 c of the flat surface portion 2 b in the slinger 2. The groove 12 is provided with a large number of grooves extending in the axial direction or spiral grooves.

（３）上記実施例では、ネジ１５の断面形状が三角形または円弧形等とされているが、このネジ１５の断面形状は特に限定されるものではない。また、図１０に示すように、このネジ１５の断面形状を排出効果の高いクサビ形とすることも考えられる。クサビ形は、相対回転方向前方側の斜面の立ち上がりが急とされる変形三角形状である。 (3) In the above embodiment, the cross-sectional shape of the screw 15 is triangular or arcuate, but the cross-sectional shape of the screw 15 is not particularly limited. Moreover, as shown in FIG. 10, it can be considered that the cross-sectional shape of the screw 15 is a wedge shape having a high discharging effect. The wedge shape is a deformed triangular shape in which the slope on the front side in the relative rotation direction has a steep rise.

また、上記第一および第二実施例に共通するところとして、上記実施例では、スリンガー２における平面部２ｂの径方向先端部２ｃの軸方向幅が板金等の板厚によって特定されることから比較的狭く設定されており、この比較的幅狭の径方向先端部２ｃに溝１２やネジ１５等が設けられているが、この径方向先端部２ｃの軸方向幅を広く設定して溝１２やネジ１５等による効果を拡大することが考えられる。この場合には、図１１に示すように、径方向先端部２ｃに軸方向一方へ向けて筒状の屈曲部２ｄを一体成形することにより、径方向先端部２ｃの軸方向幅を広くすると良い。   Further, as common to the first and second embodiments, in the above embodiment, the axial width of the radial tip portion 2c of the flat surface portion 2b in the slinger 2 is specified by the thickness of the sheet metal or the like. The relatively narrow radial tip 2c is provided with a groove 12, a screw 15 or the like, but the axial width of the radial tip 2c is set wide so that the groove 12 or It is conceivable to increase the effect of the screw 15 or the like. In this case, as shown in FIG. 11, it is preferable to increase the axial width of the radial tip portion 2c by integrally forming a cylindrical bent portion 2d toward the radial tip portion 2c in one axial direction. .

本発明の第一実施例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 1st Example of this invention. 同密封装置の要部斜視図Main part perspective view of the sealing device 他の実施例に係る密封装置の要部斜視図The principal part perspective view of the sealing device which concerns on another Example. 他の実施例に係る密封装置の要部斜視図The principal part perspective view of the sealing device which concerns on another Example. 本発明の第二実施例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 2nd Example of this invention. 同密封装置の要部斜視図Main part perspective view of the sealing device 他の実施例に係る密封装置の要部斜視図The principal part perspective view of the sealing device which concerns on another Example. 他の実施例に係る密封装置の要部斜視図The principal part perspective view of the sealing device which concerns on another Example. 他の実施例に係る密封装置の要部斜視図The principal part perspective view of the sealing device which concerns on another Example. 他の実施例に係る密封装置の要部斜視図The principal part perspective view of the sealing device which concerns on another Example. 他の実施例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 another Example. 従来例に係る密封装置の装着渋滞を示す半裁断面図Half cut sectional view showing the traffic jam of the sealing device according to the conventional example 他の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 which concerns on another prior art example

符号の説明Explanation of symbols

１ 密封装置
２ スリンガー
２ａ，３ａ 取付部
２ｂ 平面部
２ｃ 径方向先端部
２ｄ 屈曲部
３ シール部材
４ 金属環
４ａ 筒状部
５ ゴム状弾性体
６ メインリップ（シールリップ）
７ サイドリップ（シールリップ）
８ ラビリンスシール
９ 凸部
１０ 凹部
１１ テーパー
１２ 溝
１３ 段差
１４ 第二テーパー
１５ ネジ
２１ 一方の部材（ベアリング内輪）
２２ 他方の部材（ベアリング外輪）
Ａ 密封装置外側
Ｂ 密封装置内側 DESCRIPTION OF SYMBOLS 1 Sealing device 2 Slinger 2a, 3a Mounting part 2b Flat surface part 2c Radial direction front-end | tip part 2d Bending part 3 Seal member 4 Metal ring 4a Cylindrical part 5 Rubber-like elastic body 6 Main lip (seal lip)
7 Side lip (seal lip)
8 Labyrinth seal 9 Convex part 10 Concave part 11 Taper 12 Groove 13 Step 14 Second taper 15 Screw 21 One member (bearing inner ring)
22 The other member (bearing outer ring)
A Sealing device outside B Sealing device inside

Claims (2)

相対回転する二部材のうちの一方に取り付けられるスリンガー（２）と他方に取り付けられるシール部材（３）との組み合わせよりなり、前記スリンガー（２）は筒状の取付部（２ａ）と環状の平面部（２ｂ）とを一体に有し、前記シール部材（３）は筒状の取付部（３ａ）と前記スリンガー（２）に摺動自在に密接するシールリップ（６）（７）とを一体に有し、前記スリンガー（２）における平面部（２ｂ）の径方向先端部（２ｃ）とこれに対向する前記シール部材（３）の取付部（３ａ）との間に泥水等ダストの侵入を抑えるラビリンスシール（８）を設けてなる密封装置（１）において、前記ラビリンスシール（８）に、回転力により泥水を排出する環状のテーパー（１１）を設定したことを特徴とする密封装置。   It consists of a combination of a slinger (2) attached to one of two members that rotate relative to each other and a seal member (3) attached to the other. The slinger (2) has a cylindrical attachment portion (2a) and an annular flat surface. The seal member (3) has a cylindrical mounting portion (3a) and a seal lip (6) (7) that is slidably in close contact with the slinger (2). And intruding dust such as muddy water between the radial tip (2c) of the flat surface portion (2b) of the slinger (2) and the mounting portion (3a) of the seal member (3) opposed thereto. In the sealing device (1) provided with a labyrinth seal (8) for suppressing, an annular taper (11) for discharging muddy water by rotational force is set in the labyrinth seal (8). 相対回転する二部材のうちの一方に取り付けられるスリンガー（２）と他方に取り付けられるシール部材（３）との組み合わせよりなり、前記スリンガー（２）は筒状の取付部（２ａ）と環状の平面部（２ｂ）とを一体に有し、前記シール部材（３）は筒状の取付部（３ａ）と前記スリンガー（２）に摺動自在に密接するシールリップ（６）（７）とを一体に有し、前記スリンガー（２）における平面部（２ｂ）の径方向先端部（２ｃ）とこれに対向する前記シール部材（３）の取付部（３ａ）との間に泥水等ダストの侵入を抑えるラビリンスシール（８）を設けてなる密封装置（１）において、前記ラビリンスシール（８）に、回転力により泥水を排出するネジ（１５）を設定したことを特徴とする密封装置。   It consists of a combination of a slinger (2) attached to one of two members that rotate relative to each other and a seal member (3) attached to the other. The slinger (2) has a cylindrical attachment portion (2a) and an annular flat surface. The seal member (3) has a cylindrical mounting portion (3a) and a seal lip (6) (7) that is slidably in close contact with the slinger (2). And intruding dust such as muddy water between the radial tip (2c) of the flat surface portion (2b) of the slinger (2) and the mounting portion (3a) of the seal member (3) opposed thereto. In the sealing device (1) provided with the labyrinth seal (8) to be suppressed, a screw (15) for discharging muddy water by rotational force is set in the labyrinth seal (8).
JP2004050799A 2004-02-26 2004-02-26 Sealing device Pending JP2005240894A (en)

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Cited By (14)

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Publication number Priority date Publication date Assignee Title
WO2006132083A1 (en) * 2005-06-07 2006-12-14 Nok Corporation Sealing device
JP2007113621A (en) * 2005-10-19 2007-05-10 Nok Corp Hub seal
JP2009257485A (en) * 2008-04-17 2009-11-05 Nok Corp Sealing device
WO2010143694A1 (en) * 2009-06-10 2010-12-16 Nok株式会社 Sealing device
EP2410636A1 (en) * 2010-07-23 2012-01-25 Ewt Ip B.V. Lip seal for a generator
JP2012251568A (en) * 2011-05-31 2012-12-20 Mitsubishi Motors Corp Sealing device
JP2014224565A (en) * 2013-05-16 2014-12-04 キーパー株式会社 Oil seal
JP2015508879A (en) * 2012-02-24 2015-03-23 エヌティエヌ ベアリング コーポレーション オブ アメリカ Bearing protection system
WO2015064400A1 (en) * 2013-11-01 2015-05-07 内山工業株式会社 Bearing sealing device
JP2016148382A (en) * 2015-02-12 2016-08-18 Ntn株式会社 Sealing device and bearing device for wheel including the same
JP2017166548A (en) * 2016-03-15 2017-09-21 Ntn株式会社 Wheel bearing device
EP3763974A4 (en) * 2018-03-08 2021-04-07 NOK Corporation Sealing device and sealing structure
US11473627B2 (en) 2019-10-04 2022-10-18 Aktiebolaget Skf Sealing device with dynamic action, particularly for rolling bearings
DE102022116868A1 (en) 2021-07-12 2023-01-12 Uchiyama Manufacturing Corp. SEALING DEVICE

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006132083A1 (en) * 2005-06-07 2006-12-14 Nok Corporation Sealing device
JP2007113621A (en) * 2005-10-19 2007-05-10 Nok Corp Hub seal
JP4706834B2 (en) * 2005-10-19 2011-06-22 Ｎｏｋ株式会社 Hub seal
JP2009257485A (en) * 2008-04-17 2009-11-05 Nok Corp Sealing device
WO2010143694A1 (en) * 2009-06-10 2010-12-16 Nok株式会社 Sealing device
JP2010286023A (en) * 2009-06-10 2010-12-24 Nok Corp Sealing device
EP2410636A1 (en) * 2010-07-23 2012-01-25 Ewt Ip B.V. Lip seal for a generator
WO2012011811A1 (en) * 2010-07-23 2012-01-26 Ewt Ip B.V. Lip seal for a generator
JP2012251568A (en) * 2011-05-31 2012-12-20 Mitsubishi Motors Corp Sealing device
JP2015508879A (en) * 2012-02-24 2015-03-23 エヌティエヌ ベアリング コーポレーション オブ アメリカ Bearing protection system
JP2014224565A (en) * 2013-05-16 2014-12-04 キーパー株式会社 Oil seal
WO2015064400A1 (en) * 2013-11-01 2015-05-07 内山工業株式会社 Bearing sealing device
JP2015086993A (en) * 2013-11-01 2015-05-07 内山工業株式会社 Bearing sealing device
JP2016148382A (en) * 2015-02-12 2016-08-18 Ntn株式会社 Sealing device and bearing device for wheel including the same
JP2017166548A (en) * 2016-03-15 2017-09-21 Ntn株式会社 Wheel bearing device
EP3763974A4 (en) * 2018-03-08 2021-04-07 NOK Corporation Sealing device and sealing structure
US11473627B2 (en) 2019-10-04 2022-10-18 Aktiebolaget Skf Sealing device with dynamic action, particularly for rolling bearings
US11898606B2 (en) 2019-10-04 2024-02-13 Aktiebolaget Skf Sealing device with dynamic action for rolling bearings
DE102022116868A1 (en) 2021-07-12 2023-01-12 Uchiyama Manufacturing Corp. SEALING DEVICE
US20230009708A1 (en) * 2021-07-12 2023-01-12 Uchiyama Manufacturing Corp. Sealing device

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