JP2017040295A - Seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal having strength enabling many seals to be stacked up, enabling an unstable coating amount of grease coated at lip parts to be eliminated, and further achieving stabilization of sealing performance.SOLUTION: This invention relates to a seal 10 for use in tight-sealing a tight-sealed space S formed between an outer member and an inner member relatively rotated in a coaxial manner. The seal comprises a core grid 11 including a cylindrical part 110 fitted to an inner circumferential surface 2a of the outer member and a flange part 111 extending from one end part 110a of the cylindrical part toward the inner diameter side; and an elastic member 12 including a lip base part 120 fixed to the core grid and lip parts 121 extending from the lip base part toward the outer diameter side in an inclined manner and coated in advance with grease G at their inner circumferential surfaces. The other end 110b of the cylindrical part of the core grid is formed with a protruding part 112 inclined toward the inner diameter side and protruded as a part of the core grid so that the protruding part can be bent and deformed to the inner diameter side when the core grid is assembled with the outer member.SELECTED DRAWING: Figure 2

Description

本発明は、例えば、自動車等における軸受装置に用いられる密封装置に関する。   The present invention relates to a sealing device used for a bearing device in, for example, an automobile.

従来、前記のような密封装置は、外輪の内周面に嵌合される芯金と、その内周面に予めグリースが塗布されたリップ部を有した弾性部材とを備え、軸受装置内部に封入されたグリースの漏出を防止するとともに外輪と内輪との間に形成される被密封空間への水や塵埃等の浸入を防止する。
このような密封装置を外輪と内輪との間に組み付ける前は、複数の密封装置を同軸方向に積み重ねた状態で保管、搬送等を行うため、予めリップ部の内周面に塗布されたグリースが積み重ね時に隣接する他の密封装置に付着しないように配慮する必要がある。
これはリップ部に塗布されているグリース量が減ることで起こるリップ部の摺接面の潤滑不足、また、これに起因するリップ部の摩耗による耐泥水性の低下を防止するためである。 Conventionally, the sealing device as described above includes a metal core fitted to the inner peripheral surface of the outer ring, and an elastic member having a lip portion to which grease has been applied in advance on the inner peripheral surface. This prevents leakage of the encapsulated grease and prevents water and dust from entering the sealed space formed between the outer ring and the inner ring.
Before assembling such a sealing device between the outer ring and the inner ring, a plurality of sealing devices are stored and transported in a state of being stacked in the same direction. Care must be taken not to stick to other adjacent sealing devices during stacking.
This is to prevent insufficient lubrication of the slidable contact surface of the lip portion due to a decrease in the amount of grease applied to the lip portion, and a decrease in mud water resistance due to wear of the lip portion due to this.

このような配慮がなされた密封装置として、下記特許文献１が挙げられる。
下記特許文献１には、密封装置を軸方向に複数個積層させた際に、サイドリップが向いた側に隣接する芯金とグリースとの間に所定隙間が保持されるように、芯金の嵌合部の先端部に突出した状態で弾性部材からなる舌片が加硫接着によって一体に接合されているものが開示されている。 The following patent document 1 is mentioned as a sealing device in which such consideration is made.
In Patent Document 1 below, when a plurality of sealing devices are stacked in the axial direction, a predetermined gap is maintained between the core metal adjacent to the side facing the side lip and the grease. There is disclosed one in which tongue pieces made of an elastic member are integrally joined by vulcanization adhesion in a state of protruding from the tip of the fitting portion.

特開２０１０−１２１６４５号公報JP 2010-121645 A

しかし、上記特許文献１の場合は、芯金の嵌合部の先端部に別途舌片を一体に加硫接着させなければならないため、製造工数が増加する。
またこのように舌片が弾性部材からなる場合は、密封装置を１０〜３０個等、多数個積み重ねるとその重みで舌片が圧縮され、隣合う密封装置の距離が縮まり、グリースが付着するおそれがある。
さらにここに開示されている密封装置の場合、組み付け後、外輪の内周面に形成された段差に舌片を当接させることが前提とされており、舌片部を被密封空間とは反対側に向けて組み付けるタイプには適用できない構成といえる。 However, in the case of the above-mentioned Patent Document 1, since the tongue piece must be separately vulcanized and bonded to the tip of the fitting portion of the core metal, the number of manufacturing steps increases.
In addition, when the tongue piece is made of an elastic member in this way, if a large number of sealing devices such as 10 to 30 are stacked, the tongue pieces are compressed by the weight, and the distance between adjacent sealing devices may be reduced, and grease may adhere. There is.
Further, in the case of the sealing device disclosed herein, it is assumed that the tongue piece comes into contact with the step formed on the inner peripheral surface of the outer ring after assembly, and the tongue piece portion is opposite to the sealed space. It can be said that it cannot be applied to the type assembled to the side.

本発明は、前記実情に鑑みなされたもので、多数個積み重ねることができる強度を備え、リップ部に塗布されるグリースの塗布量が不安定になることを解消でき、シール性能の安定化を図ることができる密封装置を提供する。   The present invention has been made in view of the above circumstances, has a strength capable of stacking many pieces, can eliminate the unstable application amount of grease applied to the lip portion, and stabilizes the sealing performance. A sealing device that can be provided.

本発明に係る密封装置は、相対的に同軸回転する外側部材及び内側部材の間に形成される被密封空間を密封する密封装置であって、前記外側部材の内周面に嵌合される円筒部と、該円筒部の一端部から内径側に延びる鍔状部とを有した芯金と、該芯金に固着されたリップ基部と、前記リップ基部より外径側に傾斜して延び、その内周面に予めグリースが塗布されたリップ部を有した弾性部材とを備え、前記芯金の前記円筒部の他端部には、内径側へ傾斜して突出する突出部が前記芯金の一部として形成されており、前記突出部は、該密封装置を同軸方向に複数個積み重ねた際に、前記グリースが隣合う密封装置に付着しないように所定の隙間を維持するように形成され、前記芯金を前記外側部材に組み付ける際に、前記突出部が内径側に折曲変形し得るように形成されていることを特徴とする。
以上の構成によれば、前記突出部が形成されているので、複数の密封装置を同軸方向に積み重ねた際に、隣合う密封装置間の隙間が確保され、グリースが隣合う密封装置に付着しないようにすることができる。よって、被密封空間を密封するように当該密封装置を外側部材と内側部材との間に組み付けた際に、グリースの塗布量が不安定になることで発生するリップ部の摺接面の潤滑不足や耐泥水性が低下することを防止でき、シール性能の安定化を図ることができる。また芯金を外側部材に組み付ける際に、突出部が内径側に折曲変形し得るように形成されているので、組み付け場所の構成に応じて突出部を折り曲げることで省スペース対応が可能である。
また突出部が芯金の一部として形成されており、芯金の一端にゴム材で突出部を形成する場合と比べて、以下の効果を奏する。突出部の強度が向上するので、より多くの密封装置を積み重ねることが可能となる。また芯金の一部を加工して突出部を形成すればよいので、ゴム材を芯金に加硫成型する場合と比べて製造が容易である。さらに多数個の密封装置を積み重ねても、芯金の一部として形成された突出部であれば、ゴム材で形成された場合のように圧縮弾性変形して隣合う密封装置の距離が近づいてしまうことを懸念することがない。 A sealing device according to the present invention is a sealing device that seals a sealed space formed between an outer member and an inner member that rotate relatively coaxially, and is a cylinder that is fitted to an inner peripheral surface of the outer member. A cored bar having a portion and a flange-shaped part extending from one end of the cylindrical part toward the inner diameter side, a lip base fixed to the cored bar, and extending from the lip base to the outer diameter side, An elastic member having a lip portion to which grease has been applied in advance on an inner peripheral surface, and a protruding portion that protrudes in an inclined manner toward the inner diameter side is formed on the other end portion of the cylindrical portion of the cored bar. It is formed as a part, and the protrusion is formed so as to maintain a predetermined gap so that the grease does not adhere to an adjacent sealing device when a plurality of the sealing devices are stacked in the coaxial direction. When assembling the cored bar to the outer member, the protrusion is bent toward the inner diameter side. Characterized in that it is formed so as to form.
According to the above configuration, since the protruding portion is formed, when a plurality of sealing devices are stacked in the same direction, a gap between the adjacent sealing devices is secured, and grease does not adhere to the adjacent sealing devices. Can be. Therefore, when the sealing device is assembled between the outer member and the inner member so as to seal the sealed space, insufficient lubrication of the sliding surface of the lip portion that occurs due to the unstable amount of grease applied And the mud water resistance can be prevented from being lowered, and the sealing performance can be stabilized. Further, when the cored bar is assembled to the outer member, the protruding portion is formed so that it can be bent and deformed toward the inner diameter side, so it is possible to save space by bending the protruding portion according to the configuration of the assembly location. .
Moreover, the protrusion part is formed as a part of core metal, and there exists the following effect compared with the case where a protrusion part is formed with the rubber material at the end of a metal core. Since the strength of the protruding portion is improved, more sealing devices can be stacked. Moreover, since it is only necessary to form a protruding portion by processing a part of the core metal, the manufacturing is easier as compared with the case where the rubber material is vulcanized and molded into the core metal. Furthermore, even if a large number of sealing devices are stacked, if the protruding portion is formed as a part of the core metal, the distance between the adjacent sealing devices is reduced due to compression and elastic deformation as in the case of a rubber material. There is no concern about it.

本発明に係る密封装置は、前記外側部材の内周面には段差が設けられており、前記突出部を前記被密封空間側に向けて前記円筒部を前記外側部材の内周面に圧入し嵌合する際に、前記突出部を前記段差に当接させることで前記突出部を内径側に折曲変形し得るようにしてもよい。
この場合、内径側に傾斜して形成された突出部を段差に当接させることで突出部を内径側に折曲変形させることができる。
また本発明に係る密封装置は、前記突出部を前記被密封空間とは反対側に向けて前記円筒部を前記外側部材の内周面に圧入し嵌合する際に、治具を用いて前記突出部を押圧することで前記突出部を内径側に折曲変形し得るようにしてもよい。
この場合、内径側に傾斜して形成された突出部を治具を用いて押圧することで突出部を内径側に折曲変形させることができる。 In the sealing device according to the present invention, a step is provided on the inner peripheral surface of the outer member, and the cylindrical portion is press-fitted into the inner peripheral surface of the outer member with the protruding portion facing the sealed space. At the time of fitting, the protruding portion may be bent toward the inner diameter side by bringing the protruding portion into contact with the step.
In this case, the protrusion can be bent and deformed to the inner diameter side by bringing the protrusion formed inclined toward the inner diameter side into contact with the step.
Further, the sealing device according to the present invention uses a jig when the cylindrical portion is press-fitted and fitted to the inner peripheral surface of the outer member with the protruding portion facing away from the sealed space. The protrusion may be bent and deformed to the inner diameter side by pressing the protrusion.
In this case, the protrusion can be bent and deformed to the inner diameter side by pressing the protrusion formed inclined toward the inner diameter side using a jig.

本発明において、前記突出部の端部には、前記円筒部に向いて切り欠かれた切欠部が周方向に所定の間隔を空けて複数形成されているようにしてもよい。
この場合、突出部が複数の舌片状に形成されることになるので、切欠部が形成されていない場合と比べて折曲変形がしやすくなる。
本発明において、前記突出部は、前記芯金の他の部位より薄肉に形成されているようにしてもよい。
この場合、突出部が他の部位より薄肉に形成されているので、折曲変形がしやすくなる。 In the present invention, a plurality of notches that are notched toward the cylindrical portion may be formed at the end of the protruding portion at predetermined intervals in the circumferential direction.
In this case, since the projecting portion is formed into a plurality of tongue pieces, it is easier to bend and deform as compared to the case where the notched portion is not formed.
In the present invention, the protruding portion may be formed thinner than other portions of the cored bar.
In this case, since the protruding portion is formed thinner than other portions, it is easy to bend and deform.

本発明の密封装置によれば、多数個積み重ねることができる強度を備え、リップ部に塗布されるグリースの塗布量が不安定になることを解消でき、シール性能の安定化を図ることができる。   According to the sealing device of the present invention, it is possible to eliminate the unstable application amount of grease applied to the lip portion, and to stabilize the sealing performance.

本発明に係る密封装置が適用される軸受装置の一例を示す概略的縦断面図である。It is a schematic longitudinal cross-sectional view which shows an example of the bearing apparatus with which the sealing device which concerns on this invention is applied. （ａ）図１のＸ部の拡大図であって、本発明に係る密封装置の第１の実施形態を示す図であり、（ｂ）は、同密封装置における芯金の変形例を示す図である。(A) It is an enlarged view of the X section of Drawing 1, and is a figure showing a 1st embodiment of a sealing device concerning the present invention, and (b) is a figure showing a modification of a mandrel in the sealing device. It is. 図２に示す密封装置を同軸方向に積み重ねた状態の断面図である。It is sectional drawing of the state which piled up the sealing device shown in FIG. 2 in the coaxial direction. 本発明に係る密封装置の第２の実施形態を示す図である。It is a figure which shows 2nd Embodiment of the sealing device which concerns on this invention. 図４に示す密封装置を同軸方向に積み重ねた状態の断面図である。It is sectional drawing of the state which piled up the sealing device shown in FIG. 4 in the coaxial direction.

以下、本発明の実施の形態について、図面に基づいて説明する。
本実施形態に係る密封装置１０は、相対的に同軸回転する外側部材としての外輪２及び内側部材としての内輪５の間に形成される被密封空間Ｓを密封する。密封装置１０は、外輪２の内周面２ａに嵌合される円筒部１１０と、該円筒部１１０の一端部１１０ａから内径側に延びる鍔状部１１１とを有した芯金１１と、該芯金１１に固着されたリップ基部１２０と、リップ基部１２０より外径側に傾斜して延び、その摺接面１２１ａに予めグリースＧが塗布されたリップ部１２１を有した弾性部材１２とを備えている。密封装置１０の芯金１１の円筒部１１０の他端部１１０ｂには、内径側へ傾斜して突出する突出部１１２が芯金１１の一部として形成されており、突出部１１２は、密封装置１０を同軸方向に複数個積み重ねた際に、グリースＧが隣合う密封装置（１０Ａ，１０Ｂ）に付着しないように所定の隙間（Δ１・図３参照）を維持するように形成され、芯金１１を外輪２に組み付ける際には突出部１１２が内径側に折曲変形自在に形成されている。
以下、詳しく説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A sealing device 10 according to the present embodiment seals a sealed space S formed between an outer ring 2 as an outer member and an inner ring 5 as an inner member that rotate relatively coaxially. The sealing device 10 includes a mandrel 11 having a cylindrical portion 110 fitted to the inner peripheral surface 2a of the outer ring 2, a flange portion 111 extending from the one end portion 110a of the cylindrical portion 110 to the inner diameter side, and the core A lip base portion 120 fixed to the gold 11 and an elastic member 12 having a lip portion 121 that extends incline toward the outer diameter side from the lip base portion 120 and is pre-coated with grease G on its sliding contact surface 121a. Yes. The other end portion 110b of the cylindrical portion 110 of the metal core 11 of the sealing device 10 is formed with a protruding portion 112 that is inclined and protrudes toward the inner diameter side as a part of the metal core 11. The protruding portion 112 is a sealing device. It is formed so as to maintain a predetermined gap (Δ1 · see FIG. 3) so that the grease G does not adhere to the adjacent sealing devices (10A, 10B) when a plurality of 10 are stacked in the coaxial direction. When the is attached to the outer ring 2, the projecting portion 112 is formed so as to be bent and deformed on the inner diameter side.
This will be described in detail below.

まずは、図１〜図３を参照しながら、第１実施形態に係る密封装置１０について説明する。図１に密封装置１０が装着される自動車の車輪（不図示）を軸回転可能に支持する軸受装置１を示す。この軸受装置１は、大略的に、外輪２と、ハブ輪３と、ハブ輪３の車体側に嵌合一体とされる内輪部材４と、外輪２とハブ輪３及び内輪部材４との間に介装される２列の転動体（ボール）６…とを含んで構成される。この例では、ハブ輪３及び内輪部材４が内側部材としての内輪５を構成する。外輪２は、自動車の車体（不図示）に固定される。また、ハブ輪３にはドライブシャフト７が同軸的にスプライン嵌合され、ドライブシャフト７は等速ジョイント８を介して不図示の駆動源（駆動伝達部）に連結される。ドライブシャフト７はナット９によって、ハブ輪３と一体化され、ハブ輪３のドライブシャフト７からの抜脱が防止されている。内輪５（ハブ輪３及び内輪部材４）は、外輪２に対して、軸Ｌ回りに回転可能とされ、外輪２と、内輪５とにより、相対的に回転する２部材が構成され、該２部材間に環状の被密封空間Ｓが形成される。被密封空間Ｓ内には、２列の転動体６…が、リテーナ６ａに保持された状態で、外輪２の軌道輪、ハブ輪３及び内輪部材４の軌道輪３ａ，４ａを転動可能に介装されている。ハブ輪３は、円筒形状のハブ輪本体３０と、ハブ輪本体３０より立上基部３１を介して径方向外側に延出するよう形成されたハブフランジ３２を有し、ハブフランジ３２にボルト３３及び不図示のナットによって車輪が取付固定される。   First, the sealing device 10 according to the first embodiment will be described with reference to FIGS. FIG. 1 shows a bearing device 1 that supports a wheel (not shown) of an automobile to which a sealing device 10 is mounted so as to be rotatable about a shaft. The bearing device 1 is generally formed between an outer ring 2, a hub ring 3, an inner ring member 4 fitted and integrated on the vehicle body side of the hub ring 3, and between the outer ring 2, the hub ring 3, and the inner ring member 4. And two rows of rolling elements (balls) 6 interposed therebetween. In this example, the hub ring 3 and the inner ring member 4 constitute an inner ring 5 as an inner member. The outer ring 2 is fixed to a vehicle body (not shown) of the automobile. A drive shaft 7 is coaxially spline-fitted to the hub wheel 3, and the drive shaft 7 is connected to a drive source (drive transmission unit) (not shown) via a constant velocity joint 8. The drive shaft 7 is integrated with the hub wheel 3 by a nut 9 to prevent the hub wheel 3 from being detached from the drive shaft 7. The inner ring 5 (the hub ring 3 and the inner ring member 4) is rotatable around the axis L with respect to the outer ring 2, and the outer ring 2 and the inner ring 5 constitute two members that rotate relatively. An annular sealed space S is formed between the members. In the sealed space S, two rows of rolling elements 6... Are able to roll the race rings 3 a and 4 a of the outer ring 2, the hub ring 3, and the inner ring member 4 while being held by the retainer 6 a. It is intervened. The hub wheel 3 has a cylindrical hub wheel main body 30 and a hub flange 32 formed so as to extend radially outward from the hub wheel main body 30 via a rising base portion 31. The wheels are attached and fixed by nuts (not shown).

外輪２とハブ輪３との間、外輪２と内輪部材４との間には、密封装置１０，２０がそれぞれ装着され、これら密封装置１０，２０によって被密封空間Ｓが密封される。これら密封装置１０，２０のうち、ハブフランジ３２側の密封装置１０について図２を参照しながら説明する。
図２（ａ）は第１実施形態に係る密封装置１０を示しており、図１のＸ部の拡大図である。図２（ａ）に示す例の外輪２の内周面２ａの転動体６側には、内周面２ａよりも内径が小さい第２内周面２ｄが形成されており、図中、２ｃは段差（段差面）、２ｅは溝を示している。密封装置１０は、外輪２の内周面２ａに内嵌される芯金１１と、芯金１１に固着されたゴム製の弾性部材１２とを備えている。 Sealing devices 10 and 20 are mounted between the outer ring 2 and the hub ring 3 and between the outer ring 2 and the inner ring member 4, respectively, and the sealed space S is sealed by these sealing devices 10 and 20. Of these sealing devices 10 and 20, the sealing device 10 on the hub flange 32 side will be described with reference to FIG.
FIG. 2A shows the sealing device 10 according to the first embodiment, and is an enlarged view of a portion X in FIG. A second inner peripheral surface 2d having an inner diameter smaller than the inner peripheral surface 2a is formed on the inner peripheral surface 2a of the outer ring 2 in the example shown in FIG. Steps (step surfaces) and 2e indicate grooves. The sealing device 10 includes a cored bar 11 fitted into the inner peripheral surface 2 a of the outer ring 2, and a rubber elastic member 12 fixed to the cored bar 11.

芯金１１は、金属材等からなり板金加工されたリング状で、外輪２の内周面２ａに内嵌される円筒部１１０と、該円筒部１１０の一端部１１０ａから内径側に延びる鍔状部１１１と、該円筒部１１０の他端部１１０ｂから内径側へ折り曲げられた突出部１１２とを有している。突出部１１２については、後に詳述する。
鍔状部１１１の形状は、リップ部１２１，１２１の個数や形成位置に応じて設定され、図例の鍔状部１１１は、一端部１１０ａから内径側に傾斜した第１傾斜部１１１ａと、第１傾斜部１１１ａの一端部からハブフランジ３２に対して平行に形成された第１平行部１１１ｂと、第１平行部１１１ｂから内径側に傾斜した第２傾斜部１１１ｃと、第２傾斜部１１１ｃの一端部からハブフランジ３２に対して平行に形成された第２平行部１１１ｄとを有している。 The metal core 11 is a ring shape made of a metal material or the like and processed by sheet metal, and a cylindrical portion 110 fitted into the inner peripheral surface 2a of the outer ring 2, and a hook shape extending from the one end portion 110a of the cylindrical portion 110 to the inner diameter side. Part 111 and a projecting part 112 bent from the other end part 110b of the cylindrical part 110 to the inner diameter side. The protrusion 112 will be described in detail later.
The shape of the hook-shaped portion 111 is set according to the number of lip portions 121, 121 and the formation position. The hook-shaped portion 111 in the illustrated example includes a first inclined portion 111a inclined from the one end portion 110a to the inner diameter side, and a first inclined portion 111a. A first parallel portion 111b formed in parallel to the hub flange 32 from one end of the first inclined portion 111a, a second inclined portion 111c inclined from the first parallel portion 111b to the inner diameter side, and a second inclined portion 111c. And a second parallel portion 111d formed in parallel to the hub flange 32 from one end portion.

弾性部材１２は、ＮＢＲ，Ｈ−ＮＢＲ、ＡＣＭ、ＡＥＭ、ＦＫＭ等から選ばれたゴム材からなり、芯金１１に加硫成型により固着一体とされる。
弾性部材１２は、外輪２とハブ輪３との間への装着状態において鍔状部１１１のハブフランジ３２側の面に固着されたリップ基部１２０と、リップ基部１２０より外径側に傾斜して延びるように形成されたリップ部（アキシャルリップ）１２１，１２１と、転動体６側に向けて形成されたラジアルリップ１２２とを有している。リップ部１２１のハブフランジ３２との摺接面１２１ａ及びラジアルリップ１２２の立上基部３１との摺接面１２２ａには、予めグリースＧが塗布されている。また前記のような装着状態において、リップ基部１２０の外輪２の内周面２ａ側には、円筒部１１０の外径面より外方に突出するように形成された環状突部（ノーズ部）１２３が形成されている。環状突部１２３は、芯金１１が外輪２に嵌合された際には、外輪２の内周面２ａと、芯金１１の第１傾斜部１１１ａとの間に圧縮状態で介在し、これによって、外輪２の内周面２ａと円筒部１１０の外径面との間に泥水等が浸入しないように密封されている。なお、図２で２点鎖線で示す環状突部１２３は圧縮変形前の原形状を示している。 The elastic member 12 is made of a rubber material selected from NBR, H-NBR, ACM, AEM, FKM, and the like, and is integrally fixed to the core metal 11 by vulcanization molding.
The elastic member 12 includes a lip base 120 fixed to the surface of the flange portion 111 on the side of the hub flange 32 in the mounted state between the outer ring 2 and the hub ring 3, and an inclination from the lip base 120 to the outer diameter side. It has lip portions (axial lips) 121 and 121 formed so as to extend, and a radial lip 122 formed toward the rolling element 6 side. Grease G is applied in advance to the sliding contact surface 121a of the lip 121 with the hub flange 32 and the sliding contact surface 122a of the radial lip 122 with the rising base 31. Further, in the mounting state as described above, on the inner peripheral surface 2a side of the outer ring 2 of the lip base 120, an annular protrusion (nose portion) 123 formed so as to protrude outward from the outer diameter surface of the cylindrical portion 110. Is formed. When the core metal 11 is fitted to the outer ring 2, the annular protrusion 123 is interposed between the inner peripheral surface 2 a of the outer ring 2 and the first inclined part 111 a of the core metal 11 in a compressed state. Therefore, muddy water or the like is sealed between the inner peripheral surface 2 a of the outer ring 2 and the outer diameter surface of the cylindrical portion 110. In addition, the cyclic | annular protrusion 123 shown with a dashed-two dotted line in FIG. 2 has shown the original shape before compression deformation.

そして前記のような装着状態において、鍔状部１１１の第１平行部１１１ｂのハブフランジ３２側の面は、弾性部材１２で覆われており、これを治具（不図示）が当接される作用面１２０ａとする。よって、この作用面１２０ａは、治具が押し当てられる面積を確保するとともに、密封装置１０，１０・・・を複数個積み重ねるときの突出部１１２の載置場所となるように第１平行部１１１ｂの設計がなされる。
なお、リップ部１２１の個数、形状等は図例に限定されるものではなく、アキシャル方向へリップ基部１２０より外径側に傾斜して形成されたリップ部１２１が１個であってもよいし３個であってもよい。 In the mounting state as described above, the surface on the hub flange 32 side of the first parallel portion 111b of the bowl-shaped portion 111 is covered with the elastic member 12, and a jig (not shown) is brought into contact therewith. Let it be a working surface 120a. Therefore, the working surface 120a secures an area to which the jig is pressed, and the first parallel portion 111b is used as a mounting place for the protruding portion 112 when a plurality of sealing devices 10, 10. Is designed.
The number, shape, and the like of the lip portions 121 are not limited to those shown in the drawings, and there may be one lip portion 121 formed to be inclined in the axial direction from the lip base portion 120 to the outer diameter side. Three may be sufficient.

芯金１１の一部として形成された突出部１１２は、被密封空間Ｓ側に向けて円筒部１１０を外輪２の内周面２ａに圧入し嵌合する際に、突出部１１２を段差２ｃに当接させることで内径側に折曲変形し得る。図２（ａ）では芯金１１の突出部１１２が折曲変形した状態において、その折曲変形部分に相当する部位、具体的には突出部１１２の当接面１１２ｃ（段差２ｃに当接する面）から作用面１２０ａまでの寸法を「Ａ」として示している。   The protruding portion 112 formed as a part of the core metal 11 is formed so that the protruding portion 112 is brought into the step 2c when the cylindrical portion 110 is press-fitted and fitted into the inner peripheral surface 2a of the outer ring 2 toward the sealed space S side. It can be bent and deformed to the inner diameter side by contacting. In FIG. 2A, in a state where the protruding portion 112 of the metal core 11 is bent and deformed, a portion corresponding to the bent deformed portion, specifically, a contact surface 112c of the protruding portion 112 (a surface contacting the step 2c). ) To the working surface 120a is shown as “A”.

密封装置１０を外輪２とハブ輪３との間に装着する前は、図３に示すように突出部１１２は折曲変形されておらず、円筒部１１０の他端部１１０ｂから内径側へ傾斜して形成されている。図３では、上記と同様に折曲変形部分に相当する部位から作用面１２０ａまでの軸Ｌ方向の寸法を「Ａ」として示し、また折曲変形する前の突出部１１２の端部１１２ａから作用面１２０ａまでの軸Ｌ方向の寸法を「Ｂ」として示している。
図２（ａ）のように外輪２に段差２ｃが形成されている場合、密封装置１０は、その寸法を「Ｂ」から「Ａ」にすることができるので、密封装置１０の組み付けスペースが狭い場合に適用可能である。また図２（ａ）及び図３に示すように密封装置１０は、装着前後で密封装置１０の高さ寸法を変えることができ、その寸法は、装着前の高さ寸法「Ｂ」＞装着後の高さ寸法「Ａ」の関係となる。よって、複数の密封装置１０，１０・・・を軸Ｌ方向に整合するように径方向にずれることなく、積み重ねた際に、隣合う密封装置１０，１０間の隙間（Δ１・図３参照）が確保される。よって、リップ部１２１等に塗布されたグリースＧが隣合う密封装置１０，１０に付着しないようにすることができる。よって、被密封空間Ｓを密封するように密封装置１０を組み付けた際に、グリースＧの塗布量が不安定になることで発生するリップ部の摺接面の潤滑不足、またこれに起因するリップ部の摩耗によって耐泥水性が低下することを防止でき、シール性能の安定化を図ることができる。 Before the sealing device 10 is mounted between the outer ring 2 and the hub ring 3, as shown in FIG. 3, the protruding portion 112 is not bent and is inclined from the other end 110b of the cylindrical portion 110 to the inner diameter side. Is formed. In FIG. 3, the dimension in the axis L direction from the portion corresponding to the bent deformation portion to the working surface 120a is indicated as “A” in the same manner as described above, and the operation is performed from the end portion 112a of the protruding portion 112 before bending deformation. The dimension in the direction of the axis L to the surface 120a is shown as “B”.
When the step 2c is formed on the outer ring 2 as shown in FIG. 2A, the sealing device 10 can be changed from “B” to “A”, so that the assembly space of the sealing device 10 is small. Applicable to the case. Further, as shown in FIGS. 2A and 3, the sealing device 10 can change the height dimension of the sealing device 10 before and after mounting, and the dimension is the height dimension “B” before mounting> after mounting. The height dimension is “A”. Therefore, when the plurality of sealing devices 10, 10... Are stacked without being displaced in the radial direction so as to be aligned in the direction of the axis L, the gap between the adjacent sealing devices 10, 10 (see Δ1, FIG. 3). Is secured. Therefore, it is possible to prevent the grease G applied to the lip portion 121 and the like from adhering to the adjacent sealing devices 10 and 10. Therefore, when the sealing device 10 is assembled so as to seal the sealed space S, the lubrication of the slidable contact surface of the lip portion caused by the unstable application amount of the grease G, and the lip resulting therefrom It is possible to prevent the mud water resistance from being lowered due to wear of the part, and to stabilize the sealing performance.

図２（ａ）に示すように密封装置１０を外輪２に組み付ける際には、作用面１２０ａに治具（不図示）を当てて転動体６の方向へ押圧し嵌合させることで、突出部１１２の当接面１１２ｃが段差２ｃに当接され、密封装置１０が、外輪２の間の所定位置に収まったときには、突出部１１２が内径側に円筒部１１０に対して略垂直方向に折曲変形する。
このとき、突出部１１２は、図３に示すように予め内径側に若干傾斜して形成されているので、突出部１１２の当接面１１２ｃを段差２ｃに当接させることで突出部１１２を所望する内径側に折曲変形させることができる。 When assembling the sealing device 10 to the outer ring 2 as shown in FIG. 2 (a), a jig (not shown) is applied to the working surface 120a and is pressed and fitted in the direction of the rolling element 6, so that the protruding portion When the contact surface 112c of 112 is in contact with the step 2c and the sealing device 10 is in a predetermined position between the outer rings 2, the protruding portion 112 bends in a direction substantially perpendicular to the cylindrical portion 110 on the inner diameter side. Deform.
At this time, as shown in FIG. 3, the protruding portion 112 is formed to be slightly inclined toward the inner diameter side in advance, so that the protruding portion 112 is desired by bringing the contact surface 112 c of the protruding portion 112 into contact with the step 2 c. Can be bent and deformed toward the inner diameter side.

突出部１１２の端部１１２ａには、図３に示すように円筒部１１０に向いて切り欠かれた切欠部１１２ｂが周方向に所定の間隔を空けて複数形成されている。これにより、突出部１１２が複数の舌片状に形成されることになるので、外輪２とハブ輪３との間に装着する際に突出部１１２の折曲変形がしやすくなる。
また突出部１１２は、芯金１１の一部として形成されているが、図２（ａ）に示す例では、突出部１１２の板厚ｄ２は、芯金１１の他の部位、すなわち、円筒部１１０及び鍔状部１１１の板厚ｄ１よりも薄く、すなわちｄ２＜ｄ１になるように形成されている。
このように突出部１１２を芯金１１の他の部位より、薄肉とすれば、密封装置１０を外輪２とハブ輪３との間に装着する際にさらに折曲変形がしやすくなる。 As shown in FIG. 3, a plurality of cutout portions 112b cut out toward the cylindrical portion 110 are formed at the end 112a of the protruding portion 112 at predetermined intervals in the circumferential direction. Thereby, since the protrusion part 112 is formed in several tongue pieces shape, when attaching between the outer ring | wheel 2 and the hub wheel 3, the bending part 112 becomes easy to bend.
Moreover, although the protrusion part 112 is formed as a part of core metal 11, in the example shown to Fig.2 (a), plate | board thickness d2 of the protrusion part 112 is the other site | part, ie, cylindrical part, of the metal core 11. It is formed so that it is thinner than the plate | board thickness d1 of 110 and the bowl-shaped part 111, ie, d2 <d1.
If the protruding portion 112 is made thinner than the other portions of the core metal 11 in this way, it becomes easier to bend and deform when the sealing device 10 is mounted between the outer ring 2 and the hub ring 3.

ここで突出部１１２の板厚は、図２（ａ）に示すように他の部位より薄肉にする例に限定されるものではなく、図２（ｂ）に示すように他の部位と同じ板厚（ｄ１＝ｄ２）であってもよい。この場合は、突出部１１２が内径側に折曲変形しやすいように内面側に溝１１０ｃを形成するようにしてもよい。   Here, the plate thickness of the projecting portion 112 is not limited to an example in which the thickness is thinner than other portions as shown in FIG. 2A, but the same plate as the other portions as shown in FIG. 2B. Thickness (d1 = d2) may be sufficient. In this case, the groove 110c may be formed on the inner surface side so that the protruding portion 112 is easily bent and deformed on the inner diameter side.

次に図３を参照しながら、密封装置１０，１０・・・の積み重ねについて説明する。図３では説明のため、下側の密封装置１０を１０Ｂとし、その上に積み重ねられる密封装置１０を１０Ａとして示す。また図３では説明のため、２個を積み重ねた例を示しているが、実際には、１０個〜３０個、或いは１ダース単位等で積み重ねて梱包される。
密封装置１０は、軸受装置１に装着される前は、複数個を積み重ねて梱包され、梱包された状態で軸受装置１の組立現場に搬入される。この積み重ねの際には、予めリップ部１２１，１２１の摺接面１２１ａ，１２１ａ及びラジアルリップ１２２の摺接面１２２ａに、所定量のグリースＧが塗布される。 Next, the stacking of the sealing devices 10, 10... Will be described with reference to FIG. In FIG. 3, the lower sealing device 10 is shown as 10B, and the sealing device 10 stacked thereon is shown as 10A for the sake of explanation. In addition, FIG. 3 shows an example in which two are stacked for explanation, but in actuality, they are stacked in a package of 10 to 30 or a dozen unit.
Before the sealing device 10 is mounted on the bearing device 1, a plurality of the sealing devices 10 are stacked and packed, and are loaded into the assembly site of the bearing device 1 in a packed state. In this stacking, a predetermined amount of grease G is applied in advance to the sliding contact surfaces 121a and 121a of the lip portions 121 and 121 and the sliding contact surface 122a of the radial lip 122.

密封装置１０Ｂを、作用面１２０ａが上側、芯金１１の突出部１１２が下側となる向きとし、その上に同じ向きとした密封装置１０Ａを載せ置く。このとき密封装置１０Ａは、突出部１１２の端部１１２ａを下になる密封装置１０Ｂの作用面１２０ａに載置する。同じ要領で複数個の密封装置１０・・・は、順次同心的に積み重ねられる。この積み重ね状態において、密封装置１０Ｂの最も外径側のリップ部１２１の先端１２１ｂと、その上に積み重ねられる密封装置１０Ａの芯金１１の第１平行部１１１ｂとの間には、隙間Δ１が形成される。
そして軸受装置１の組立現場に搬入された密封装置１０Ａ，１０Ｂ・・・の梱包体は、開梱され、密封装置１０Ａ，１０Ｂ・・・が１個ずつばらされて、所定の位置に装着される。
以上の本実施形態によれば、突出部１１２が芯金１１の一部として形成されており、芯金１１の一端にゴム材で突出部を形成する場合と比べて、突出部１１２の強度が向上するので、より多くの密封装置１０・・・を積み重ねることが可能となる。また芯金１１の一部を加工して突出部１１２を形成すればよいので、ゴム材を芯金に加硫成型する場合と比べて製造が容易である。さらに多数個の密封装置を積み重ねても、芯金１１の一部として突出部１１２が形成されているので、ゴム材で形成された場合のように圧縮弾性変形して隣合う密封装置の距離が近づいてしまうことを懸念することがない。 The sealing device 10B is oriented so that the working surface 120a is on the upper side and the protruding portion 112 of the core metal 11 is on the lower side, and the sealing device 10A having the same orientation is placed thereon. At this time, the sealing device 10A places the end portion 112a of the protruding portion 112 on the working surface 120a of the sealing device 10B. In the same manner, the plurality of sealing devices 10 are sequentially stacked concentrically. In this stacked state, a gap Δ1 is formed between the tip 121b of the lip portion 121 on the outermost diameter side of the sealing device 10B and the first parallel portion 111b of the core metal 11 of the sealing device 10A stacked thereon. Is done.
The package of the sealing devices 10A, 10B... Carried into the assembly site of the bearing device 1 is unpacked, and the sealing devices 10A, 10B. The
According to the above embodiment, the protruding portion 112 is formed as a part of the core metal 11, and the strength of the protruding portion 112 is higher than that in the case where the protruding portion is formed of a rubber material at one end of the core metal 11. Since it improves, it becomes possible to stack more sealing devices 10 .... Moreover, since the protrusion 112 may be formed by processing a part of the core metal 11, the manufacturing is easier as compared with the case where the rubber material is vulcanized and molded into the core metal. Further, even when a large number of sealing devices are stacked, the protrusion 112 is formed as a part of the core metal 11, so that the distance between the adjacent sealing devices is reduced by compressive elastic deformation as in the case of being formed of a rubber material. Don't worry about getting close.

次に図４、図５を参照しながら、第２実施形態に係る密封装置１０’について説明する。前記実施形態と共通部分には同一の符号を付し、その作用・効果等の説明は割愛する。
本実施形態に示す密封装置１０’は、芯金１１の形状が相違し、突出部１１２が上述のように転動体６側でなく、ハブフランジ３２側に配置される。外輪２に段差２ｃが形成されている点、リップ部１２１，１２１およびラジアルリップ１２２の基本構成は第１実施形態と共通である。また図４、図５では、突出部１１２の板厚を芯金１１の他の部位より薄肉とした例を示しているが、これに限定されず図２（ｂ）のように同じ板厚としてもよい。さらに図４、図５では、切欠部がない例を示しているが、図３のように切欠部１１２ｂを有したものとしてもよい。 Next, a sealing device 10 ′ according to the second embodiment will be described with reference to FIGS. The same reference numerals are given to the same parts as those in the above-described embodiment, and the description of the operation and effect is omitted.
In the sealing device 10 ′ shown in the present embodiment, the shape of the cored bar 11 is different, and the protrusion 112 is arranged not on the rolling element 6 side but on the hub flange 32 side as described above. The basic structure of the lip portions 121 and 121 and the radial lip 122 is the same as that of the first embodiment in that a step 2c is formed on the outer ring 2. 4 and 5 show an example in which the plate thickness of the protruding portion 112 is thinner than other portions of the core metal 11, but the present invention is not limited to this, and the same plate thickness is used as shown in FIG. Also good. Further, FIGS. 4 and 5 show an example in which there is no notch, but it may have a notch 112b as shown in FIG.

密封装置１０’は、外輪２の内周面２ａに内嵌される芯金１１と、芯金１１に固着されたゴム製の弾性部材１２とを備えている。
芯金１１は、金属材等からなり板金加工されたリング状で、外輪２の内周面２ａに内嵌される円筒部１１０と、該円筒部１１０の一端部１１０ａから内径側に延びる鍔状部１１１と、該円筒部１１０の他端部１１０ｂから内径側へ折り曲げられた突出部１１２とを有している。図例の鍔状部１１１は、一端部１１０ａから段差２ｃに対して平行に当接するように形成された第１平行部１１１ｅと、第１平行部１１１ｅの一端部から内径側に傾斜した第１傾斜部１１１ｆと、第１傾斜部１１１ｆの一端部からハブフランジ３２に対して平行に形成された第２平行部１１１ｇと有している。 The sealing device 10 ′ includes a cored bar 11 fitted into the inner peripheral surface 2 a of the outer ring 2, and a rubber elastic member 12 fixed to the cored bar 11.
The metal core 11 is a ring shape made of a metal material or the like and processed by sheet metal, and a cylindrical portion 110 fitted into the inner peripheral surface 2a of the outer ring 2, and a hook shape extending from the one end portion 110a of the cylindrical portion 110 to the inner diameter side. Part 111 and a projecting part 112 bent from the other end part 110b of the cylindrical part 110 to the inner diameter side. In the illustrated example, the bowl-shaped portion 111 includes a first parallel portion 111e formed so as to be in contact with the step 2c in parallel from the one end portion 110a, and a first inclined portion that is inclined toward the inner diameter side from one end portion of the first parallel portion 111e. It has the inclined part 111f and the 2nd parallel part 111g formed in parallel with respect to the hub flange 32 from the one end part of the 1st inclined part 111f.

本実施形態における突出部１１２の外面１１２ｄは、被密封空間Ｓ側に向けて円筒部１１０を外輪２の内周面２ａに圧入し嵌合する際に、治具に押圧される作用面となる。すなわち、治具を用いて突出部１１２の外面１１２ｄを押圧することで、突出部１１２を内径側に折曲変形する。そして、その後も段差２ｃに鍔状部１１１の第１平行部１１１ｅの転動体６側の面となる当接面１１１ｈが当接するまで圧入していくことで密封装置１０’を外輪２に組み付けることができる。図４では芯金１１の突出部１１２を折曲変形させた状態において、その作用面に相当する部位から鍔状部１１１の当接面１１１ｈ（段差２ｃに当接する面）までの寸法を「Ｃ」として示している。   In the present embodiment, the outer surface 112d of the protruding portion 112 serves as a working surface that is pressed by the jig when the cylindrical portion 110 is press-fitted into the inner peripheral surface 2a of the outer ring 2 toward the sealed space S side. . That is, the protrusion 112 is bent and deformed to the inner diameter side by pressing the outer surface 112d of the protrusion 112 using a jig. After that, the sealing device 10 ′ is assembled to the outer ring 2 by pressing into the step 2c until the contact surface 111h which is the surface of the first parallel portion 111e of the flange 111 on the rolling element 6 side contacts. Can do. In FIG. 4, in a state where the protruding portion 112 of the core metal 11 is bent and deformed, the dimension from the portion corresponding to the working surface to the contact surface 111 h (surface contacting the step 2 c) of the flange-shaped portion 111 is expressed as “C ".

密封装置１０’を外輪２とハブ輪３との間に装着する前は、図５に示すように突出部１１２は折曲変形されておらず、円筒部１１０の他端部１１０ｂから内径側へ傾斜して形成されている。図５では、上記の同様に作用面に相当する部位から当接面１１１ｈまでの軸Ｌ方向の寸法を「Ｃ」として示し、また折曲変形する前の突出部１１２の端部１１２ａから当接面１１１ｈまでの軸Ｌ方向の寸法を「Ｄ」として示している。
密封装置１０’は、外輪２への組み付け時にその寸法を「Ｄ」から「Ｃ」にすることができるので、密封装置１０’の組み付けスペースが狭い場合に適用可能である。また図４及び図５に示すように密封装置１０’は、装着前後で密封装置１０’の高さ寸法を変えることができ、その寸法は、装着前の高さ寸法「Ｄ」＞装着後の高さ寸法「Ｃ」の関係となる。よって、複数の密封装置１０’，１０’・・・を同軸方向に積み重ねた際に、隣合う密封装置１０’，１０’間の隙間（Δ２・図５参照）が確保され、グリースＧが隣合う密封装置１０’，１０’に付着しないようにすることができる。よって、被密封空間Ｓを密封するように密封装置１０’を外輪２とハブ輪３との間に組み付けた際に、グリースＧの塗布量が不安定になることで発生するリップ部の摺接面の潤滑不足や耐泥水性が低下することを防止でき、シール性能の安定化を図ることができる。 Before the sealing device 10 ′ is mounted between the outer ring 2 and the hub ring 3, the projecting portion 112 is not bent and deformed from the other end portion 110 b of the cylindrical portion 110 to the inner diameter side as shown in FIG. 5. Inclined. In FIG. 5, the dimension in the direction of the axis L from the portion corresponding to the working surface to the contact surface 111h is indicated as “C” in the same manner as described above, and contact is made from the end 112a of the protrusion 112 before bending deformation. The dimension in the axis L direction up to the surface 111h is shown as “D”.
Since the size of the sealing device 10 ′ can be changed from “D” to “C” when assembled to the outer ring 2, the sealing device 10 ′ can be applied when the assembly space of the sealing device 10 ′ is narrow. Further, as shown in FIGS. 4 and 5, the sealing device 10 ′ can change the height dimension of the sealing device 10 ′ before and after mounting, and the dimension is the height dimension “D” before mounting> after mounting. The height dimension is “C”. Therefore, when a plurality of sealing devices 10 ′, 10 ′,... Are stacked in the same direction, a gap (see Δ2, FIG. 5) between the adjacent sealing devices 10 ′, 10 ′ is secured, and the grease G is adjacent. It can be prevented from adhering to the matching sealing devices 10 ', 10'. Therefore, when the sealing device 10 ′ is assembled between the outer ring 2 and the hub ring 3 so as to seal the sealed space S, the sliding contact of the lip portion that occurs due to the unstable amount of grease G applied. It is possible to prevent insufficient lubrication of the surface and decrease in mud water resistance, and to stabilize the sealing performance.

図４に示すように密封装置１０’を外輪２とハブ輪３との間に装着する際には、上述したとおり、作用面となる突出部１１２の外面１１２ｄに治具を当てて転動体６（被密封空間Ｓ）方向へ押圧し嵌合させることで、鍔状部１１１の当接面１１１ｈが段差２ｃに当接され、密封装置１０’が、外輪２とハブ輪３との間の所定位置に収まったときには、突出部１１２が内径側に円筒部１１０に対して略垂直方向に折曲変形する。
このとき、突出部１１２は、図５に示すように予め内径側に若干傾斜して形成されているので、治具を外面１１２ｄに当てて押圧していけば、突出部１１２を所望する内径側に折曲変形させることができる。
なお、図４に示す密封装置１０’の構成によれば、外輪２の内周面２ａに段差２ｃが形成されていない場合にも適用可能である。この場合は、密封装置１０’を外輪２に組み付ける際に、突出部１１２が治具に押圧され、折曲変形しながら、円筒部１１０が外輪２の内周面２ａに嵌合される。 As shown in FIG. 4, when the sealing device 10 ′ is mounted between the outer ring 2 and the hub ring 3, as described above, a jig is applied to the outer surface 112 d of the projecting portion 112 serving as the working surface, and the rolling element 6. By pressing and fitting in the (sealed space S) direction, the contact surface 111h of the bowl-shaped portion 111 is brought into contact with the step 2c, and the sealing device 10 'is provided between the outer ring 2 and the hub ring 3. When it is in the position, the projecting portion 112 is bent and deformed in the direction substantially perpendicular to the cylindrical portion 110 on the inner diameter side.
At this time, as shown in FIG. 5, the protruding portion 112 is formed to be slightly inclined in advance toward the inner diameter side. Therefore, if the jig is pressed against the outer surface 112d and pressed, the protruding portion 112 is desired on the inner diameter side. Can be bent and deformed.
In addition, according to the structure of sealing device 10 'shown in FIG. 4, even when the level | step difference 2c is not formed in the internal peripheral surface 2a of the outer ring | wheel 2, it is applicable. In this case, when the sealing device 10 ′ is assembled to the outer ring 2, the protruding portion 112 is pressed by the jig, and the cylindrical portion 110 is fitted to the inner peripheral surface 2 a of the outer ring 2 while being bent and deformed.

次に図５を参照しながら、密封装置１０’，１０’・・・の積み重ねについて説明する。図５では説明のため、下側の密封装置１０’を１０Ｄとし、その上に積み重ねられる密封装置１０’を１０Ｃとして示す。また図５では説明のため、２個を積み重ねた例を示しているが、実際には、１０個〜３０個、或いは１ダース単位等で積み重ねて梱包される点は第１実施形態と同様である。   Next, the stacking of the sealing devices 10 ', 10' ... will be described with reference to FIG. In FIG. 5, for the sake of explanation, the lower sealing device 10 'is shown as 10D, and the sealing device 10' stacked thereon is shown as 10C. In addition, FIG. 5 shows an example in which two pieces are stacked for the sake of explanation, but in actuality, it is the same as that in the first embodiment in that 10 to 30 pieces or 1 dozen units are stacked and packed. is there.

密封装置１０Ｄを、芯金１１の突出部１１２が上側、芯金１１の当接面１１１ｈが下側となる向きとし、その上に同じ向きとして密封装置１０Ｃを載せ置く。このとき密封装置１０Ｃは、当接面１１１ｈを下になる密封装置１０Ｄの突出部１１２の端部１１２ａの上に載置する。同じ要領で複数個の密封装置１０’・・・は、順次同心的に積み重ねられる。この積み重ね状態において、密封装置１０Ｄの最も外径側のリップ部１２１の先端１２１ｂと、その上に積み重ねられる密封装置１０Ｃの当接面１１１ｈとの間には、隙間Δ２が形成される。
そして軸受装置１の組立現場に搬入された密封装置１０Ｃ，１０Ｄ・・・の梱包体は、開梱され、密封装置１０Ｃ，１０Ｄ・・・が１個ずつばらされて、所定の位置に装着される。
以上のように本実施形態においても、突出部１１２が芯金１１の一部として形成されており、芯金１１の一端にゴム材で突出部を形成する場合と比べて、突出部１１２の強度が向上するので、より多くの密封装置１０・・・を積み重ねることが可能となる。また芯金１１の一部を加工して突出部１１２を形成すればよいので、ゴム材を芯金に加硫成型する場合と比べて製造が容易である。さらに多数個の密封装置を積み重ねても、芯金１１の一部として突出部１１２が形成されているので、ゴム材で形成された場合のように圧縮弾性変形して隣合う密封装置の距離が近づいてしまうことを懸念することがない。 The sealing device 10D is oriented so that the protruding portion 112 of the core metal 11 is on the upper side and the contact surface 111h of the core metal 11 is on the lower side, and the sealing device 10C is placed thereon in the same direction. At this time, the sealing device 10C is placed on the end 112a of the protruding portion 112 of the sealing device 10D with the contact surface 111h below. In the same manner, the plurality of sealing devices 10 '... are sequentially stacked concentrically. In this stacked state, a gap Δ2 is formed between the tip 121b of the lip portion 121 on the outermost diameter side of the sealing device 10D and the contact surface 111h of the sealing device 10C stacked thereon.
Then, the packing body of the sealing devices 10C, 10D... Carried into the assembly site of the bearing device 1 is unpacked, and the sealing devices 10C, 10D. The
As described above, also in the present embodiment, the protruding portion 112 is formed as a part of the core metal 11, and the strength of the protruding portion 112 is higher than that in the case where the protruding portion is formed of a rubber material at one end of the core metal 11. As a result, more sealing devices 10 can be stacked. Moreover, since the protrusion 112 may be formed by processing a part of the core metal 11, the manufacturing is easier as compared with the case where the rubber material is vulcanized and molded into the core metal. Further, even when a large number of sealing devices are stacked, the protrusion 112 is formed as a part of the core metal 11, so that the distance between the adjacent sealing devices is reduced by compressive elastic deformation as in the case of being formed of a rubber material. Don't worry about getting close.

なお、密封装置１０の構成はこれに限定されず、芯金１１及びこれに固着される弾性部材１２の形状も図例のものに限定されず、リップ部（アキシャルリップ）及びラジアルリップの形状・個数等も要求される仕様等に応じて適宜変更が可能である。また密封装置１０は、例えば立上基部３１に沿うように湾曲状もしくはテーパー状としたハブ用スリンガ（不図示）と組み合わせて使用される構成としてもよい。このハブ用スリンガは、ステンレスやＳＰＣＣ等の鋼板をプレス加工及び曲げ加工等して形成され、リップ部１２１，１２１及びラジアルリップ１２２は、ハブ用スリンガに弾性的に摺接するように形成される。   The configuration of the sealing device 10 is not limited to this, and the shapes of the core metal 11 and the elastic member 12 fixed to the core 11 are not limited to those shown in the figure, and the shapes of the lip portion (axial lip) and the radial lip The number and the like can be changed as appropriate according to the required specifications. The sealing device 10 may be configured to be used in combination with a hub slinger (not shown) that is curved or tapered along the upright base portion 31, for example. The hub slinger is formed by pressing and bending a steel plate such as stainless steel or SPCC, and the lip portions 121 and 121 and the radial lip 122 are formed so as to be in sliding contact with the hub slinger elastically.

２ 外輪（外側部材）
２ａ 内周面
２ｃ 段差
Ｓ 被密封空間
５ 内輪（内側部材）
１０，１０’（１０Ａ〜１０Ｄ） 密封装置
１１ 芯金
１１０ 円筒部
１１０ａ 一端部
１１０ｂ 他端部
１１１ 鍔状部
１１２ 突出部
１１２ｂ 切欠部
１２ 弾性部材
１２０ リップ基部
１２１ リップ部
Δ１，Δ２ 隙間
Ｇ グリース 2 Outer ring (outer member)
2a Inner peripheral surface 2c Level difference S Sealed space 5 Inner ring (inner member)
10, 10 ′ (10A to 10D) Sealing device 11 Core metal 110 Cylindrical portion 110a One end portion 110b Other end portion 111 Hook portion 112 Projection portion 112b Notch portion 12 Elastic member 120 Lip base portion 121 Lip portion Δ1, Δ2 Gap G Grease

Claims (5)

相対的に同軸回転する外側部材及び内側部材の間に形成される被密封空間を密封する密封装置であって、
前記外側部材の内周面に嵌合される円筒部と、該円筒部の一端部から内径側に延びる鍔状部とを有した芯金と、該芯金に固着されたリップ基部と、前記リップ基部より外径側に傾斜して延び、その内周面に予めグリースが塗布されたリップ部を有した弾性部材と、を備え、
前記芯金の前記円筒部の他端部には、内径側へ傾斜して突出する突出部が前記芯金の一部として形成されており、
前記突出部は、該密封装置を同軸方向に複数個積み重ねた際に、前記グリースが隣合う密封装置に付着しないように所定の隙間を維持するように形成され、前記芯金を前記外側部材に組み付ける際に、前記突出部が内径側に折曲変形し得るように形成されていることを特徴とする密封装置。 A sealing device for sealing a sealed space formed between an outer member and an inner member that rotate relatively coaxially,
A cylindrical part fitted to the inner peripheral surface of the outer member, a core bar having a flange-like part extending from one end of the cylindrical part to the inner diameter side, a lip base fixed to the core metal, An elastic member having a lip portion extending inclining to the outer diameter side from the lip base portion and having a lip portion coated with grease in advance on the inner peripheral surface thereof,
At the other end portion of the cylindrical portion of the core bar, a protruding portion that protrudes inclined toward the inner diameter side is formed as a part of the core bar,
The protrusion is formed to maintain a predetermined gap so that the grease does not adhere to an adjacent sealing device when a plurality of the sealing devices are stacked in the coaxial direction, and the cored bar is attached to the outer member. When assembling, the projecting portion is formed so as to bend and deform toward the inner diameter side. 請求項１において、
前記外側部材の内周面には段差が設けられており、
前記突出部を前記被密封空間側に向けて前記円筒部を前記外側部材の内周面に圧入し嵌合する際に、前記突出部を前記段差に当接させることで前記突出部を内径側に折曲変形し得るようにしたことを特徴とする密封装置。 In claim 1,
A step is provided on the inner peripheral surface of the outer member,
When the cylindrical portion is press-fitted and fitted to the inner peripheral surface of the outer member with the protruding portion facing the sealed space, the protruding portion is brought into contact with the step so that the protruding portion is on the inner diameter side. A sealing device characterized in that it can be bent and deformed. 請求項１において、
前記突出部を前記被密封空間とは反対側に向けて前記円筒部を前記外側部材の内周面に圧入し嵌合する際に、治具を用いて前記突出部を押圧することで前記突出部を内径側に折曲変形し得るようにしたことを特徴とする密封装置。 In claim 1,
When the cylindrical portion is press-fitted and fitted to the inner peripheral surface of the outer member with the protruding portion facing away from the sealed space, the protruding portion is pressed by pressing the protruding portion with a jig. A sealing device characterized in that the portion can be bent and deformed to the inner diameter side. 請求項１〜請求項３のいずれか１項において、
前記突出部の端部には、前記円筒部に向いて切り欠かれた切欠部が周方向に所定の間隔を空けて複数形成されていることを特徴とする密封装置。 In any one of Claims 1-3,
2. A sealing device according to claim 1, wherein a plurality of cutout portions that are cut out toward the cylindrical portion are formed at predetermined intervals in the circumferential direction at an end of the protruding portion. 請求項１〜請求項４のいずれか１項において、
前記突出部は、前記芯金の他の部位より薄肉に形成されていることを特徴とする密封装置。 In any one of Claims 1-4,
The sealing device according to claim 1, wherein the protruding portion is formed thinner than other portions of the cored bar.

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