JP2022068470A - Hermetically sealing device - Google Patents

Hermetically sealing device Download PDF

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Publication number
JP2022068470A
JP2022068470A JP2020177162A JP2020177162A JP2022068470A JP 2022068470 A JP2022068470 A JP 2022068470A JP 2020177162 A JP2020177162 A JP 2020177162A JP 2020177162 A JP2020177162 A JP 2020177162A JP 2022068470 A JP2022068470 A JP 2022068470A
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hole
rigid
jig
elastic
sealing device
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JP2020177162A
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JP7562368B2 (en
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岳洋 中川
Takehiro Nakagawa
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Nok Corp
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Nok Corp
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Priority to JP2020177162A priority Critical patent/JP7562368B2/en
Priority to CN202122264911.3U priority patent/CN215980489U/en
Priority to CN202111092645.9A priority patent/CN114382785B/en
Publication of JP2022068470A publication Critical patent/JP2022068470A/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
    • F16C33/7816—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
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • 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
    • F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
    • 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
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting 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
    • 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
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Devices (AREA)

Abstract

To provide a hermetically sealing device which can be easily captured by a jig for pulling out the hermetically sealing device.SOLUTION: A hermetically sealing device seals a gap between an inner member and an outer member of a rolling bearing. The hermetically sealing device comprises an inner sealing member fixed to the inner member and an outer sealing member fixed to the outer member. The outer sealing member comprises a rigid portion formed of a rigid material, and an elastic portion formed of an elastic material. The elastic portion has lips extending toward the inner sealing member. The rigid portion includes: a cylindrical portion fitted into an inner surface of a hole of the outer member; an annular portion extending radially inward from the cylindrical portion; a plurality of axially-protruding portions protruding from the annular portion toward an atmosphere side; and a hook portion which is formed in at least one of the axially-protruding portions, and to which a tip of a jig for pulling out the outer sealing member from the outer member can be hooked on. The outer sealing member further has guide recesses which are located radially outside the hook portion and into which the tip of the jig can be fitted.SELECTED DRAWING: Figure 1

Description

本発明は、転がり軸受の内部を密封する密封装置に関する。 The present invention relates to a sealing device that seals the inside of a rolling bearing.

鉄道車両またはトラック、バスなどの大型自動車に使用される転がり軸受は、大きな荷重を受け、多量のダストにさらされ、大幅な温度変化の影響を受ける。したがって、転がり軸受は、しばしば補修する必要性に迫られる。特に鉄道車両の周囲には、鉄道の摩耗により発生した多量の鉄粉が存在する。 Rolling bearings used in railroad vehicles or large vehicles such as trucks and buses are subject to heavy loads, large amounts of dust, and are subject to significant temperature changes. Therefore, rolling bearings often need to be repaired. Especially around railway vehicles, there is a large amount of iron powder generated by the wear of railways.

特許文献１は、鉄道車両での使用に適した転がり軸受の内部を密封する密封装置を開示する。この密封装置は、転がり軸受の補修に伴って、交換するのに適している。具体的には、この密封装置は、転がり軸受から密封装置を引っ張り出す治具の先端で捕捉される凹部を有する。 Patent Document 1 discloses a sealing device that seals the inside of a rolling bearing suitable for use in a railway vehicle. This sealing device is suitable for replacement as the rolling bearing is repaired. Specifically, the sealing device has a recess that is captured by the tip of a jig that pulls the sealing device out of the rolling bearing.

国際公開第２０１９／０７４０４２号International Publication No. 2019/074042

上記のタイプの密封装置について、凹部へ治具を簡単に挿入することができるのが望ましい。 For the above types of sealing devices, it is desirable that the jig can be easily inserted into the recess.

そこで、本発明は、転がり軸受から密封装置を引っ張り出す治具で簡単に捕捉することができる密封装置を提供する。 Therefore, the present invention provides a sealing device that can be easily captured by a jig that pulls out the sealing device from the rolling bearing.

本発明のある態様においては、転がり軸受の相対的に回転する内側部材と外側部材との間に配置され、前記内側部材と前記外側部材との間の間隙を封止する密封装置が提供される。この密封装置は、前記内側部材に固定される環状の内側シール部材と、前記外側部材の孔の内面に固定される環状の外側シール部材とを備える。前記外側シール部材は、剛性材料から形成された剛性部と、前記剛性部に固定された弾性材料から形成された弾性部とを備える。前記弾性部は、前記内側シール部材に向けて延びる少なくとも１つのリップを有する。前記剛性部は、前記外側部材の孔の内面に嵌め込まれる円筒部分と、前記円筒部分の大気側の端部から径方向内側に向けて延びる円環部分と、前記円環部分から大気側に向けて軸線方向に突出する複数の軸線方向突出部分と、前記軸線方向突出部分の少なくとも１つに形成され、前記外側シール部材を前記外側部材から引っ張り出す治具の先端を引っ掛け可能な少なくとも１つのフック部を有する。前記外側シール部材は、さらに、前記フック部の径方向外側に位置し、前記治具の前記先端を嵌め入れることが可能な少なくとも１つの案内凹部を有する。 In one aspect of the invention, there is provided a sealing device that is disposed between a relatively rotating inner member and an outer member of a rolling bearing and seals a gap between the inner member and the outer member. .. This sealing device includes an annular inner sealing member fixed to the inner member and an annular outer sealing member fixed to the inner surface of a hole in the outer member. The outer seal member includes a rigid portion formed of a rigid material and an elastic portion formed of an elastic material fixed to the rigid portion. The elastic portion has at least one lip extending towards the inner sealing member. The rigid portion includes a cylindrical portion fitted into the inner surface of the hole of the outer member, an annular portion extending radially inward from the end portion of the cylindrical portion on the atmosphere side, and the annular portion toward the atmosphere side. At least one hook formed on at least one of the plurality of axially projecting portions and the axially projecting portion, and capable of hooking the tip of a jig for pulling out the outer sealing member from the outer member. Has a part. The outer seal member further has at least one guide recess located radially outside the hook portion into which the tip of the jig can be fitted.

この態様においては、治具の先端を引っ掛け可能なフック部の径方向外側に、治具の先端を嵌め入れることが可能な案内凹部が設けられている。したがって、治具の先端を案内凹部に嵌め入れて、さらに径方向内側に移動させることによって、治具の先端を剛性部のフック部に簡単かつ円滑に引っ掛けることができる。すなわち、案内凹部は、治具をフック部に対して容易に位置決めすることを可能とし、治具をフック部に円滑に引っ掛けることができるように案内する。このため作業効率が向上する。 In this embodiment, a guide recess into which the tip of the jig can be fitted is provided on the radial outer side of the hook portion where the tip of the jig can be hooked. Therefore, by fitting the tip of the jig into the guide recess and further moving it inward in the radial direction, the tip of the jig can be easily and smoothly hooked on the hook portion of the rigid portion. That is, the guide recess makes it possible to easily position the jig with respect to the hook portion, and guides the jig so that it can be smoothly hooked on the hook portion. Therefore, work efficiency is improved.

本発明の実施形態に係る密封装置の断面図である。It is sectional drawing of the sealing apparatus which concerns on embodiment of this invention. 実施形態に係る密封装置の他の断面を示す断面図である。It is sectional drawing which shows the other sectional view of the sealing apparatus which concerns on embodiment. 密封装置の外側シール部材の剛性部の断面図である。It is sectional drawing of the rigid part of the outer seal member of a sealing device. 剛性部の斜視図である。It is a perspective view of a rigid part. 密封装置の外側シール部材の平面図である。It is a top view of the outer seal member of a sealing device. 転がり軸受から取り外される最初の段階の実施形態に係る密封装置の断面図である。FIG. 6 is a cross-sectional view of a sealing device according to an embodiment of the first stage of being removed from a rolling bearing. 図６の次の段階の密封装置の断面図である。It is sectional drawing of the sealing apparatus of the next stage of FIG. 図７の次の段階の密封装置の断面図である。FIG. 7 is a cross-sectional view of the sealing device of the next stage of FIG. 本発明の他の実施形態に係る密封装置の断面図である。It is sectional drawing of the sealing apparatus which concerns on other embodiment of this invention.

以下、添付の図面を参照しながら本発明に係る実施形態を説明する。図面の縮尺は必ずしも正確ではなく、一部の特徴は誇張または省略されることもある。 Hereinafter, embodiments according to the present invention will be described with reference to the accompanying drawings. Drawing scales are not always accurate and some features may be exaggerated or omitted.

図１および図２は、本発明の実施形態に係る密封装置１が使用される転がり軸受２の一例である鉄道車両の車軸の軸受を示す。但し、本発明の用途は、鉄道車両の軸受には限定されず、トラック、バスなどの大型自動車の車軸の軸受にも本発明は適用可能である。また、図示の転がり軸受２は、ＲＣＴ（Rotating End Cap Tapered Roller）軸受であるが、本発明の用途は、ＲＣＴ軸受には限定されず、他の種類の転動体を有する、ＲＣＣ（Rotating End Cap Cylindrical Roller）軸受、玉軸受、針軸受などの他の転がり軸受にも本発明は適用可能である。 1 and 2 show an axle bearing of a railroad vehicle, which is an example of a rolling bearing 2 in which the sealing device 1 according to the embodiment of the present invention is used. However, the application of the present invention is not limited to bearings for railway vehicles, and the present invention can also be applied to bearings for axles of large automobiles such as trucks and buses. Further, the rolling bearing 2 shown in the figure is an RCT (Rotating End Cap Tapered Roller) bearing, but the application of the present invention is not limited to the RCT bearing and has an RCC (Rotating End Cap) having another type of rolling element. Cylindrical Roller) The present invention is also applicable to other rolling bearings such as bearings, ball bearings and needle bearings.

転がり軸受２は、車軸４が内部に挿入される内輪（内側部材）６と、内輪６の外側に配置された外輪（外側部材）８と、内輪６と外輪８の間に１列に配置された複数のローラー１０と、ローラー１０を定位置に保持する保持器１４とを有する。外輪８が固定されている一方で、内輪６は、車軸４の回転に伴って回転する。保持器１４は外輪８に固定されている。 The rolling bearings 2 are arranged in a row between the inner ring (inner member) 6 into which the axle 4 is inserted, the outer ring (outer member) 8 arranged outside the inner ring 6, and the inner ring 6 and the outer ring 8. It also has a plurality of rollers 10 and a cage 14 that holds the rollers 10 in place. While the outer ring 8 is fixed, the inner ring 6 rotates with the rotation of the axle 4. The cage 14 is fixed to the outer ring 8.

密封装置１は、相対的に回転する内輪６と外輪８との間に配置され、内輪６と外輪８との間の間隙を封止する。密封装置１の作用により、転がり軸受２の内部からのグリース、すなわち潤滑剤の流出が防止または低減されるとともに、外部から転がり軸受２の内部への異物（水（泥水または塩水を含む）および／またはダスト（鉄粉を含む））の流入が防止または低減される。図１および図２において、矢印Ｄは、外部からの異物の流れの方向の例を示す。 The sealing device 1 is arranged between the inner ring 6 and the outer ring 8 that rotate relatively, and seals the gap between the inner ring 6 and the outer ring 8. By the action of the sealing device 1, the outflow of grease, that is, the lubricant from the inside of the rolling bearing 2 is prevented or reduced, and foreign matter (including water (including muddy water or salt water)) and / or foreign matter (including muddy water or salt water) into the inside of the rolling bearing 2 from the outside. Or the inflow of dust (including iron powder) is prevented or reduced. In FIGS. 1 and 2, the arrow D shows an example of the direction of the flow of foreign matter from the outside.

図１および図２においては、車軸４に対する左側部分のみが示されているが、密封装置１および転がり軸受２は回転対称な形状を有する。図１および図２の上側は、軸受内部側Ｂであり、下側は大気側Ａである。 Although only the left side portion with respect to the axle 4 is shown in FIGS. 1 and 2, the sealing device 1 and the rolling bearing 2 have a rotationally symmetric shape. The upper side of FIGS. 1 and 2 is the bearing internal side B, and the lower side is the atmospheric side A.

転がり軸受２には、軸受内部側Ｂを挟んで密封装置１の反対側にも密封装置１と類似の密封装置が設けられる。 The rolling bearing 2 is provided with a sealing device similar to the sealing device 1 on the opposite side of the sealing device 1 with the bearing inner side B interposed therebetween.

密封装置１は、環状の内側シール部材２０と、環状の外側シール部材３０とを備える。内側シール部材２０は、内輪６に固定される。外側シール部材３０は、外輪８の孔８Ａの内面に固定され、外側シール部材３０は内側シール部材２０に摺動可能に接触する。 The sealing device 1 includes an annular inner sealing member 20 and an annular outer sealing member 30. The inner seal member 20 is fixed to the inner ring 6. The outer seal member 30 is fixed to the inner surface of the hole 8A of the outer ring 8, and the outer seal member 30 is slidably in contact with the inner seal member 20.

内側シール部材２０は、剛性材料、例えば金属から形成されている。内側シール部材２０は、スリーブ２２と、フランジ２４と、外側スリーブ２６とを備える。スリーブ２２は内輪６に固定される。固定の方式は、例えば締まり嵌めであってよい。フランジ２４は、スリーブ２２の大気側の端部に一体に連結されて径方向外側に広がる。外側スリーブ２６は、フランジ２４の外端縁から軸受内部側Ｂに向けて延びる。外側スリーブ２６はスリーブ２２と同軸である。 The inner sealing member 20 is made of a rigid material, for example metal. The inner seal member 20 includes a sleeve 22, a flange 24, and an outer sleeve 26. The sleeve 22 is fixed to the inner ring 6. The fixing method may be, for example, a tight fit. The flange 24 is integrally connected to the end of the sleeve 22 on the atmosphere side and extends radially outward. The outer sleeve 26 extends from the outer edge of the flange 24 toward the bearing inner side B. The outer sleeve 26 is coaxial with the sleeve 22.

外側シール部材３０は、剛性材料、例えば金属から形成された剛性部３１と、弾性材料、例えばエラストマーから形成された弾性部４０とを備える二重構造を有する。剛性部３１は弾性部４０を補強する。 The outer seal member 30 has a double structure including a rigid portion 31 formed of a rigid material such as metal and an elastic portion 40 formed of an elastic material such as an elastomer. The rigid portion 31 reinforces the elastic portion 40.

剛性部３１は、円筒部分３２と、円環部分３３と、複数の軸線方向突出部分３４と、複数の内側延長部分３５とを有する。 The rigid portion 31 has a cylindrical portion 32, an annular portion 33, a plurality of axially projecting portions 34, and a plurality of inward extension portions 35.

円筒部分３２は、外輪８の孔８Ａに締まり嵌めによって嵌め込まれ、孔８Ａの内面に固定される。円筒部分３２の軸受内部側Ｂの端部３２ａは、径方向外側に広がったフックとして形成されている。孔８Ａには周溝すなわち凹部８Ｂが形成されており、円筒部分３２の端部３２ａは凹部８Ｂに嵌め込まれる。 The cylindrical portion 32 is fitted into the hole 8A of the outer ring 8 by tightening and is fixed to the inner surface of the hole 8A. The end portion 32a of the bearing inner side B of the cylindrical portion 32 is formed as a hook extending radially outward. A peripheral groove, that is, a recess 8B is formed in the hole 8A, and the end portion 32a of the cylindrical portion 32 is fitted into the recess 8B.

円環部分３３は、円筒部分３２の大気側Ａの端部に一体に連結されて、径方向内側に向けて延びる。円環部分３３は、外側シール部材３０の軸線方向に垂直な平面内に延びている。 The annular portion 33 is integrally connected to the end of the cylindrical portion 32 on the atmospheric side A and extends radially inward. The annular portion 33 extends in a plane perpendicular to the axial direction of the outer seal member 30.

複数の軸線方向突出部分３４は、円環部分３３から大気側Ａに向けて外側シール部材３０の軸線方向に突出する。図３および図４に示すように、軸線方向突出部分３４は、円環部分３３のうち周方向に角間隔をおいて離れた複数の箇所が折り曲げられた形状を有する。また、円環部分３３のうち軸線方向突出部分３４が形成されていない複数の箇所は、円環部分３３から径方向内側に向けて延びた複数の内側延長部分３５に連続している。好ましくは、軸線方向突出部分３４は等角間隔をおいて配置され、内側延長部分３５も等角間隔をおいて配置されるが、これらの角間隔が等しくなくてもよい。この実施形態では、８つの軸線方向突出部分３４および８つの内側延長部分３５が設けられているが、軸線方向突出部分３４の個数および内側延長部分３５の個数は、２以上の限定されない数であってよい。 The plurality of axially projecting portions 34 project from the annular portion 33 toward the atmosphere side A in the axial direction of the outer seal member 30. As shown in FIGS. 3 and 4, the axially projecting portion 34 has a shape in which a plurality of portions of the annular portion 33 separated at angular intervals in the circumferential direction are bent. Further, the plurality of portions of the annular portion 33 in which the axially protruding portion 34 is not formed are continuous with the plurality of inner extension portions 35 extending inward in the radial direction from the annular portion 33. Preferably, the axially projecting portions 34 are arranged at equal intervals, and the inner extension portions 35 are also arranged at equal intervals, but these angular intervals may not be equal. In this embodiment, eight axially projecting portions 34 and eight inward extension portions 35 are provided, but the number of axially projecting portions 34 and the number of inner extension portions 35 are not limited to two or more. You can do it.

少なくとも１つの軸線方向突出部分３４には貫通孔３６が形成されている。後述するように、貫通孔３６は、外側シール部材３０を外輪８から引っ張り出すために使用される。この実施形態では、貫通孔３６は、軸線方向突出部分３４の各々に形成されている。 A through hole 36 is formed in at least one axially projecting portion 34. As will be described later, the through hole 36 is used to pull out the outer seal member 30 from the outer ring 8. In this embodiment, the through holes 36 are formed in each of the axially protruding portions 34.

この実施形態では、貫通孔３６は、軸線方向突出部分３４から円環部分３３まで延びている。つまり、貫通孔３６は、剛性部３１の径方向において、軸線方向突出部分３４を貫通し、剛性部３１の軸線方向において、円環部分３３を貫通する。 In this embodiment, the through hole 36 extends from the axially protruding portion 34 to the annular portion 33. That is, the through hole 36 penetrates the axially protruding portion 34 in the radial direction of the rigid portion 31, and penetrates the annular portion 33 in the axial direction of the rigid portion 31.

貫通孔３６が設けられていることにより、軸線方向突出部分３４は、貫通孔３６の両側の側部３４ａと、側部３４ａを連結する連結部（フック部）３４ｂに区分することができる。連結部３４ｂには、外側シール部材３０を外輪８から引っ張り出すために治具の先端が引っ掛けられる。 By providing the through hole 36, the axially protruding portion 34 can be divided into a side portion 34a on both sides of the through hole 36 and a connecting portion (hook portion) 34b connecting the side portions 34a. The tip of the jig is hooked on the connecting portion 34b in order to pull out the outer sealing member 30 from the outer ring 8.

図５は、密封装置１の外側シール部材３０の平面図である。図１は図５のI-I線断面を示し、図２は図５のII-II線断面を示す。 FIG. 5 is a plan view of the outer sealing member 30 of the sealing device 1. FIG. 1 shows a cross section taken along line I-I of FIG. 5, and FIG. 2 shows a cross section taken along line II-II of FIG.

図１、図２および図５に示すように、弾性部４０は、円環部分４１、筒壁部分４２、ブロック部４３、シールリップ４４、ダストリップ４５、および径方向突起４６を有する。 As shown in FIGS. 1, 2 and 5, the elastic portion 40 has an annular portion 41, a tubular wall portion 42, a block portion 43, a seal lip 44, a dust strip 45, and a radial protrusion 46.

円環部分４１は、剛性部３１の円環部分３３を被覆する。剛性部３１の円環部分３３には貫通孔３６が形成されているが、円環部分４１はこれらの貫通孔３６を閉塞する。 The annular portion 41 covers the annular portion 33 of the rigid portion 31. Through holes 36 are formed in the annular portion 33 of the rigid portion 31, and the annular portion 41 closes these through holes 36.

筒壁部分４２は、円筒形状を有しており、円環部分４１から内側シール部材２０のフランジ２４に向けて延びる。筒壁部分４２は、剛性部３１の複数の軸線方向突出部分３４に固定されている。周方向に連続する円筒状の筒壁部分４２には、周方向に間欠的に配置された複数の軸線方向突出部分３４の全体が埋設されており、軸線方向突出部分３４は筒壁部分４２を補強する。 The tubular wall portion 42 has a cylindrical shape and extends from the annular portion 41 toward the flange 24 of the inner sealing member 20. The tubular wall portion 42 is fixed to a plurality of axially projecting portions 34 of the rigid portion 31. In the cylindrical cylindrical wall portion 42 that is continuous in the circumferential direction, the entire plurality of axially projecting portions 34 that are intermittently arranged in the circumferential direction are embedded, and the axially projecting portion 34 has the tubular wall portion 42. Reinforce.

ブロック部４３は、筒壁部分４２の径方向内側に配置され、円環部分４１の内端に形成された厚さが大きい円環状の部分である。ブロック部４３は、剛性部３１の複数の内側延長部分３５に固定されている。周方向に連続する円環状のブロック部４３には、周方向に間欠的に配置された複数の内側延長部分３５の全体が埋設されており、内側延長部分３５はブロック部４３を補強する。 The block portion 43 is an annular portion having a large thickness, which is arranged inside the tubular wall portion 42 in the radial direction and is formed at the inner end of the annular portion 41. The block portion 43 is fixed to a plurality of inner extension portions 35 of the rigid portion 31. The entire plurality of inner extension portions 35 intermittently arranged in the circumferential direction are embedded in the annular block portion 43 continuous in the circumferential direction, and the inner extension portion 35 reinforces the block portion 43.

シールリップ４４は、ブロック部４３から延びて、内側シール部材２０のスリーブ２２の外周面に摺動可能に接触する厚さが小さい環である。シールリップ４４は、軸受内部側Ｂから大気側Ａへのグリースの漏れを防止または低減する。シールリップ４４は、ブロック部４３から径方向内側に向けて延びる基端部分４４ａと、基端部分４４ａから軸受内部側Ｂかつ径方向内側に向けて延びる先端部分４４ｂとを有しており、先端部分４４ｂが内側シール部材２０のスリーブ２２の外周面に全周にわたって摺動可能に接触する。 The seal lip 44 is a ring having a small thickness extending from the block portion 43 and slidably contacting the outer peripheral surface of the sleeve 22 of the inner seal member 20. The seal lip 44 prevents or reduces grease leakage from the bearing inner side B to the atmospheric side A. The seal lip 44 has a base end portion 44a extending radially inward from the block portion 43, and a tip portion 44b extending from the base end portion 44a to the bearing inner side B and radially inward. The portion 44b slidably contacts the outer peripheral surface of the sleeve 22 of the inner sealing member 20 over the entire circumference.

ダストリップ４５は、ブロック部４３から内側シール部材２０のフランジ２４に向けて延びる厚さが小さい環である。ダストリップ４５は、大気側Ａから軸受内部側Ｂへの異物の侵入を防止または低減する。ダストリップ４５は、ブロック部４３から大気側Ａかつ径方向内側に向けて延びる基端部分４５ａと、基端部分４５ａから大気側Ａかつ径方向外側に向けて延びる先端部分４５ｂとを有する。この実施形態では、ダストリップ４５はフランジ２４に接触していないが、ダストリップ４５の先端部分４５ｂが内側シール部材２０のフランジ２４に摺動可能に接触してもよい。 The dust strip 45 is a ring having a small thickness extending from the block portion 43 toward the flange 24 of the inner sealing member 20. The dust strip 45 prevents or reduces the intrusion of foreign matter from the atmospheric side A to the bearing inner side B. The dust strip 45 has a proximal end portion 45a extending from the block portion 43 toward the atmosphere side A and radially inward, and a tip portion 45b extending from the proximal end portion 45a toward the atmosphere side A and radially outward. In this embodiment, the dust strip 45 is not in contact with the flange 24, but the tip portion 45b of the dust strip 45 may be slidably contacting the flange 24 of the inner seal member 20.

径方向突起４６は、ブロック部４３の内端縁から径方向内側に向けて突出する。径方向突起４６はブロック部４３の内端縁の全周にわたって設けられている。径方向突起４６は、径方向外側が広く、内側が狭い台形の断面を有する。径方向突起４６は、内側シール部材２０とは接触せず、径方向突起４６と内側シール部材２０のスリーブ２２との間には、円環状の小さい間隙４８が設けられる。間隙４８は、軸受内部側Ｂから大気側Ａへのグリースの流れを阻害し、シールリップ４４に到達するグリースの量を低減することによって、シールリップ４４の封止性能を補助する。 The radial protrusion 46 projects inward in the radial direction from the inner edge of the block portion 43. The radial protrusion 46 is provided over the entire circumference of the inner edge of the block portion 43. The radial projection 46 has a trapezoidal cross section that is wide on the radial outside and narrow on the inside. The radial protrusion 46 does not come into contact with the inner sealing member 20, and a small annular gap 48 is provided between the radial protrusion 46 and the sleeve 22 of the inner sealing member 20. The gap 48 assists the sealing performance of the seal lip 44 by obstructing the flow of grease from the bearing internal side B to the atmospheric side A and reducing the amount of grease reaching the seal lip 44.

外側シール部材３０の剛性部３１に間欠的に設けられた複数の軸線方向突出部分３４および弾性部４０の筒壁部分４２は、内側シール部材２０のフランジ２４に向けて延びている。筒壁部分４２は、フランジ２４には接触せず、筒壁部分４２とフランジ２４との間には間隙４９が設けられている。 A plurality of axially protruding portions 34 intermittently provided in the rigid portion 31 of the outer seal member 30 and a tubular wall portion 42 of the elastic portion 40 extend toward the flange 24 of the inner seal member 20. The cylinder wall portion 42 does not come into contact with the flange 24, and a gap 49 is provided between the cylinder wall portion 42 and the flange 24.

内側シール部材２０の外側スリーブ２６は、筒壁部分４２の外側に配置されている。筒壁部分４２は外側スリーブ２６には接触せず、筒壁部分４２と外側スリーブ２６との間には間隙５０が設けられている。 The outer sleeve 26 of the inner seal member 20 is arranged on the outside of the cylinder wall portion 42. The cylinder wall portion 42 does not come into contact with the outer sleeve 26, and a gap 50 is provided between the cylinder wall portion 42 and the outer sleeve 26.

外部からの異物が転がり軸受２に侵入しようとしても、多くの異物が、外側シール部材３０の筒壁部分４２、内側シール部材２０の外側スリーブ２６、または内側シール部材２０のフランジ２４によって跳ね返される。筒壁部分４２と外側スリーブ２６との間の間隙５０、および筒壁部分４２とフランジ２４との間の間隙４９を通過した異物がダストリップ４５に到達するが、これらの間隙４９，５０を小さく設定することによって、ダストリップ４５に到達する異物の量を削減することができる。筒壁部分４２は、これに埋設された複数の軸線方向突出部分３４で補強されているので、異物から受ける力が強くても、力に耐えることができる。 Even if foreign matter from the outside tries to enter the rolling bearing 2, many foreign matter is repelled by the cylinder wall portion 42 of the outer sealing member 30, the outer sleeve 26 of the inner sealing member 20, or the flange 24 of the inner sealing member 20. Foreign matter that has passed through the gap 50 between the cylinder wall portion 42 and the outer sleeve 26 and the gap 49 between the cylinder wall portion 42 and the flange 24 reaches the dust strip 45, but these gaps 49 and 50 are made smaller. By setting, the amount of foreign matter reaching the dust strip 45 can be reduced. Since the cylinder wall portion 42 is reinforced by a plurality of axially projecting portions 34 embedded therein, it can withstand the force even if the force received from the foreign matter is strong.

上記の通り、剛性部３１の軸線方向突出部分３４と円環部分３３には、貫通孔３６が形成されている。しかし、密封装置１は、使用時においては密封性を有しなければならない。弾性部４０は、剛性部３１の貫通孔３６を閉塞するように、剛性部３１の円環部分３３と軸線方向突出部分３４を被覆する。具体的には、円環部分４１は、軸受内部側Ｂから貫通孔３６を閉塞し、筒壁部分４２は軸線方向突出部分３４の内周面、外周面および端面を覆うことにより、大気側Ａから貫通孔３６を閉塞する。 As described above, through holes 36 are formed in the axially protruding portion 34 and the annular portion 33 of the rigid portion 31. However, the sealing device 1 must have a sealing property at the time of use. The elastic portion 40 covers the annular portion 33 of the rigid portion 31 and the axially protruding portion 34 so as to close the through hole 36 of the rigid portion 31. Specifically, the annular portion 41 closes the through hole 36 from the bearing inner side B, and the tubular wall portion 42 covers the inner peripheral surface, the outer peripheral surface, and the end surface of the axially projecting portion 34, thereby covering the atmospheric side A. The through hole 36 is closed.

貫通孔３６を閉塞する円環部分４１の大気側Ａの面には、少なくとも１つの案内凹部５２が形成されている。案内凹部５２は、少なくとも１つの連結部（フック部）３４ｂの径方向外側に位置する。案内凹部５２には、外側シール部材３０を外輪８から引っ張り出すために連結部３４ｂに引っ掛けられる治具の先端を嵌め入れることが可能である。 At least one guide recess 52 is formed on the surface of the atmosphere side A of the annular portion 41 that closes the through hole 36. The guide recess 52 is located radially outside of at least one connecting portion (hook portion) 34b. The tip of a jig hooked on the connecting portion 34b in order to pull out the outer sealing member 30 from the outer ring 8 can be fitted into the guide recess 52.

この実施形態では、複数の連結部３４ｂが複数の軸線方向突出部分３４にそれぞれ形成され、これらの連結部３４ｂの径方向外側に案内凹部５２がそれぞれ配置されている。 In this embodiment, a plurality of connecting portions 34b are formed in the plurality of axially projecting portions 34, respectively, and guide recesses 52 are arranged on the radial outer side of these connecting portions 34b.

貫通孔３６を閉塞する円環部分４１と筒壁部分４２の軸受内部側Ｂ側の面には、貫通しない少なくとも１つの穴５４が形成されている。剛性部３１の少なくとも１つの貫通孔３６の内部に、弾性部４０の少なくとも１つの穴５４が配置されている。この実施形態では、剛性部３１の複数の貫通孔３６の内部に、弾性部４０の複数の穴５４がそれぞれ配置されている。 At least one hole 54 that does not penetrate is formed on the bearing inner side B side surface of the annular portion 41 that closes the through hole 36 and the cylinder wall portion 42. At least one hole 54 of the elastic portion 40 is arranged inside at least one through hole 36 of the rigid portion 31. In this embodiment, the plurality of holes 54 of the elastic portion 40 are arranged inside the plurality of through holes 36 of the rigid portion 31, respectively.

穴５４の側壁５４ａは、軸線方向突出部分３４の側部３４ａの貫通孔３６側の面を覆う。穴５４の底壁５４ｂは、軸線方向突出部分３４の連結部３４ｂの貫通孔３６側の面を覆う。このようにして、貫通孔３６が弾性部４０で閉塞されており、貫通孔３６の内部に、弾性部４０の一方の面に形成された穴５４と、弾性部４０の他方の面に形成された案内凹部５２が配置されている。弾性部４０の穴５４と案内凹部５２は弾性部４０を貫通していない（例えば、案内凹部５２と穴５４の間には、非常に薄い壁５６が設けられている）。したがって、密封装置１は使用時においては密封性を有し、大気側Ａと軸受内部側Ｂを遮断する。 The side wall 54a of the hole 54 covers the surface of the side portion 34a of the axially protruding portion 34 on the through hole 36 side. The bottom wall 54b of the hole 54 covers the surface of the connecting portion 34b of the axially protruding portion 34 on the through hole 36 side. In this way, the through hole 36 is closed by the elastic portion 40, and inside the through hole 36, a hole 54 formed on one surface of the elastic portion 40 and a hole 54 formed on the other surface of the elastic portion 40 are formed. The guide recess 52 is arranged. The hole 54 and the guide recess 52 of the elastic portion 40 do not penetrate the elastic portion 40 (for example, a very thin wall 56 is provided between the guide recess 52 and the hole 54). Therefore, the sealing device 1 has a sealing property when used, and blocks the atmospheric side A and the bearing internal side B.

転がり軸受２の補修に伴って、密封装置１を交換する必要性がある。図６から図８を参照して、密封装置１の取り外し作業を説明する。 With the repair of the rolling bearing 2, it is necessary to replace the sealing device 1. The work of removing the sealing device 1 will be described with reference to FIGS. 6 to 8.

まず、少なくとも１つの治具６０を準備する。治具６０は、長尺なハンドル部６０ａと、ハンドル部６０ａに対して屈曲した先端部６０ｂとを有する。作業者はハンドル部６０ａを握る。 First, at least one jig 60 is prepared. The jig 60 has a long handle portion 60a and a tip portion 60b bent with respect to the handle portion 60a. The operator grips the handle portion 60a.

そして、図６に示すように、治具６０の先端部６０ｂを、密封装置１の外側シール部材３０の案内凹部５２に嵌め入れる。この時、先端部６０ｂをハンドル部６０ａに対して、密封装置１の径方向内側に向ける。次に、矢印で示すように、先端部６０ｂを案内凹部５２に対して摺動させ、治具６０を密封装置１の径方向内側に移動させる。 Then, as shown in FIG. 6, the tip portion 60b of the jig 60 is fitted into the guide recess 52 of the outer sealing member 30 of the sealing device 1. At this time, the tip portion 60b is directed inward in the radial direction of the sealing device 1 with respect to the handle portion 60a. Next, as shown by an arrow, the tip portion 60b is slid with respect to the guide recess 52, and the jig 60 is moved inward in the radial direction of the sealing device 1.

そして、図７に示すように、治具６０の先端部６０ｂで、案内凹部５２と穴５４の間の壁５６を突き破ることによって、治具６０の先端部６０ｂを、外側シール部材３０の剛性部３１の貫通孔３６のうち軸線方向突出部分３４の側部３４ａと連結部（フック部）３４ｂで囲まれた部分に挿入することができる。つまり、治具６０の先端部６０ｂを、外側シール部材３０の連結部３４ｂに簡単かつ円滑に引っ掛けることができる。 Then, as shown in FIG. 7, the tip portion 60b of the jig 60 is pierced through the wall 56 between the guide recess 52 and the hole 54, so that the tip portion 60b of the jig 60 is formed into a rigid portion of the outer sealing member 30. It can be inserted into the portion of the through hole 36 of 31 surrounded by the side portion 34a of the axially protruding portion 34 and the connecting portion (hook portion) 34b. That is, the tip portion 60b of the jig 60 can be easily and smoothly hooked on the connecting portion 34b of the outer seal member 30.

この状態で、治具６０により、外側シール部材３０に対して径方向内側に向かう力Ｆを与えて、軸線方向に大気側Ａに向かう力Ｓを与える。これによって、外側シール部材３０を径方向に圧縮し、大気側Ａに移動させることによって、外輪８の孔８Ａの内面から外側シール部材３０の剛性部３１の円筒部分３２を部分的に離す。特に、孔８Ａの凹部８Ｂから円筒部分３２の端部３２ａを取り外す。 In this state, the jig 60 applies a force F toward the inner side in the radial direction to the outer seal member 30 and a force S toward the atmosphere side A in the axial direction. As a result, the outer seal member 30 is compressed in the radial direction and moved to the atmosphere side A, whereby the cylindrical portion 32 of the rigid portion 31 of the outer seal member 30 is partially separated from the inner surface of the hole 8A of the outer ring 8. In particular, the end 32a of the cylindrical portion 32 is removed from the recess 8B of the hole 8A.

次に、図８に示すように、外側シール部材３０の連結部３４ｂに先端部６０ｂが引っ掛けられた治具６０を大気側Ａに引くことにより、外側シール部材３０を軸線方向に移動させて、外側シール部材３０を転がり軸受２の外輪８の孔８Ａから抜き出すことができる。一旦、外輪８の孔８Ａの内面から外側シール部材３０の剛性部３１の円筒部分３２を部分的に離せば、外側シール部材３０の弾性変形を利用して、外側シール部材３０を転がり軸受２の外輪８の孔８Ａから抜き出すのは容易である。 Next, as shown in FIG. 8, the outer seal member 30 is moved in the axial direction by pulling the jig 60 having the tip portion 60b hooked on the connecting portion 34b of the outer seal member 30 toward the atmosphere side A. The outer seal member 30 can be pulled out from the hole 8A of the outer ring 8 of the rolling bearing 2. Once the cylindrical portion 32 of the rigid portion 31 of the outer seal member 30 is partially separated from the inner surface of the hole 8A of the outer ring 8, the outer seal member 30 is rolled on the outer seal member 2 by utilizing the elastic deformation of the outer seal member 30. It is easy to pull out from the hole 8A of the outer ring 8.

外側シール部材３０を抜き出すことと同時に、治具６０の先端部６０ｂを内側シール部材２０の外側スリーブ２６に引っ掛けて、内側シール部材２０を大気側Ａに引くことにより、内側シール部材２０を軸線方向に移動させて、内側シール部材２０を内輪６から取り外すことができる。但し、外側シール部材３０と内側シール部材２０を同時に取り外すことは必須ではなく、内側シール部材２０を内輪６から引き抜いた後に、外側シール部材３０を外輪８から引き抜いてもよい。 At the same time as pulling out the outer seal member 30, the tip 60b of the jig 60 is hooked on the outer sleeve 26 of the inner seal member 20 and the inner seal member 20 is pulled toward the atmosphere side A to pull the inner seal member 20 in the axial direction. The inner seal member 20 can be removed from the inner ring 6 by moving to. However, it is not essential to remove the outer seal member 30 and the inner seal member 20 at the same time, and the outer seal member 30 may be pulled out from the outer ring 8 after the inner seal member 20 is pulled out from the inner ring 6.

外側シール部材３０の取り外し作業は、１つの治具６０だけを使用して行なってもよい。但し、複数の治具６０の先端部６０ｂを複数の連結部（フック部）３４ｂに引っ掛けて、外側シール部材３０を外輪８から取り外してもよい。 The work of removing the outer seal member 30 may be performed using only one jig 60. However, the outer seal member 30 may be removed from the outer ring 8 by hooking the tip portions 60b of the plurality of jigs 60 on the plurality of connecting portions (hook portions) 34b.

この実施形態に係る外側シール部材３０においては、治具６０の先端部６０ｂを引っ掛け可能な連結部（フック部）３４ｂの径方向外側に、治具６０の先端部６０ｂを嵌め入れることが可能な案内凹部５２が設けられている。したがって、治具６０の先端部６０ｂを案内凹部５２に嵌め入れて、さらに径方向内側に移動させることによって、治具６０の先端部６０ｂを剛性部３１の連結部３４ｂに簡単かつ円滑に引っ掛けることができる。すなわち、案内凹部５２は、治具６０を連結部３４ｂに対して容易に位置決めすることを可能とし、治具６０を連結部３４ｂに円滑に引っ掛けることができるように案内する。このため作業効率が向上する。また、案内凹部５２と穴５４の間の壁５６を治具６０の先端部６０ｂで突き破ることによって、治具６０の先端部６０ｂを剛性部３１の連結部３４ｂに簡単かつ円滑に引っ掛けることができる。 In the outer seal member 30 according to this embodiment, the tip portion 60b of the jig 60 can be fitted on the radial outside of the connecting portion (hook portion) 34b on which the tip portion 60b of the jig 60 can be hooked. A guide recess 52 is provided. Therefore, by fitting the tip portion 60b of the jig 60 into the guide recess 52 and further moving it inward in the radial direction, the tip portion 60b of the jig 60 can be easily and smoothly hooked on the connecting portion 34b of the rigid portion 31. Can be done. That is, the guide recess 52 makes it possible to easily position the jig 60 with respect to the connecting portion 34b, and guides the jig 60 so that it can be smoothly hooked on the connecting portion 34b. Therefore, work efficiency is improved. Further, by penetrating the wall 56 between the guide recess 52 and the hole 54 with the tip portion 60b of the jig 60, the tip portion 60b of the jig 60 can be easily and smoothly hooked to the connecting portion 34b of the rigid portion 31. ..

図９は、本発明の他の実施形態に係る密封装置６１の断面図である。図９において、既に説明した構成要素を示すため、同一の符号が使用され、それらの構成要素については詳細には説明しない。 FIG. 9 is a cross-sectional view of the sealing device 61 according to another embodiment of the present invention. In FIG. 9, the same reference numerals are used to indicate the components already described, and these components will not be described in detail.

密封装置６１の外側シール部材３０では、剛性部３１の少なくとも１つの軸線方向突出部分３４に、貫通孔６６が形成されている。上記の貫通孔３６と異なり、貫通孔６６は円環部分３３には延びていない。貫通孔６６が設けられていることにより、軸線方向突出部分３４は、貫通孔６６の両側の側部３４ａと、側部３４ａを連結する連結部（フック部）３４ｂに区分することができる。連結部３４ｂには、外側シール部材３０を外輪８から引っ張り出すために治具６０の先端部６０ｂが引っ掛けられる。 In the outer seal member 30 of the sealing device 61, a through hole 66 is formed in at least one axially projecting portion 34 of the rigid portion 31. Unlike the above-mentioned through hole 36, the through hole 66 does not extend to the annular portion 33. By providing the through hole 66, the axially protruding portion 34 can be divided into a side portion 34a on both sides of the through hole 66 and a connecting portion (hook portion) 34b connecting the side portions 34a. The tip portion 60b of the jig 60 is hooked on the connecting portion 34b in order to pull out the outer seal member 30 from the outer ring 8.

軸線方向突出部分３４に形成された貫通孔３６は、弾性部４０の筒壁部分４２で塞がれている。筒壁部分４２の貫通孔６６に対応する位置には、凹部６７が形成されている。凹部６７は、治具６０の先端部６０ｂを貫通孔６６に挿入するのを容易にする。 The through hole 36 formed in the axially protruding portion 34 is closed by the tubular wall portion 42 of the elastic portion 40. A recess 67 is formed at a position corresponding to the through hole 66 of the cylinder wall portion 42. The recess 67 facilitates insertion of the tip 60b of the jig 60 into the through hole 66.

剛性部３１の円環部分３３の大気側Ａの面は、弾性部４０の円環部分６８で被覆されている。円環部分６８には、少なくとも１つの案内凹部６９が形成されている。案内凹部６９は、少なくとも１つの連結部（フック部）３４ｂの径方向外側に位置する。案内凹部６９には、外側シール部材３０を外輪８から引っ張り出すために連結部３４ｂに引っ掛けられる治具６０の先端部６０ｂを嵌め入れることが可能である。 The surface of the atmosphere side A of the annular portion 33 of the rigid portion 31 is covered with the annular portion 68 of the elastic portion 40. At least one guide recess 69 is formed in the annulus portion 68. The guide recess 69 is located radially outside of at least one connecting portion (hook portion) 34b. The tip portion 60b of the jig 60 hooked on the connecting portion 34b in order to pull out the outer seal member 30 from the outer ring 8 can be fitted into the guide recess 69.

密封装置６１を転がり軸受２から取り外す場合には、図９に示すように、治具６０の先端部６０ｂを、密封装置６１の外側シール部材３０の案内凹部６９に嵌め入れる。この時、先端部６０ｂをハンドル部６０ａに対して、密封装置６１の径方向内側に向ける。次に、矢印で示すように、先端部６０ｂを案内凹部６９に対して摺動させ、治具６０を密封装置６１の径方向内側に移動させる。 When the sealing device 61 is removed from the rolling bearing 2, as shown in FIG. 9, the tip portion 60b of the jig 60 is fitted into the guide recess 69 of the outer sealing member 30 of the sealing device 61. At this time, the tip portion 60b is directed inward in the radial direction of the sealing device 61 with respect to the handle portion 60a. Next, as shown by an arrow, the tip portion 60b is slid with respect to the guide recess 69 to move the jig 60 inward in the radial direction of the sealing device 61.

そして、治具６０の先端部６０ｂで、筒壁部分４２の凹部６７の奥の壁を圧縮することによって、治具６０の先端部６０ｂを、外側シール部材３０の剛性部３１の貫通孔６６に挿入することができる。つまり、治具６０の先端部６０ｂを、外側シール部材３０の連結部３４ｂに簡単かつ円滑に引っ掛けることができる。 Then, by compressing the inner wall of the recess 67 of the cylinder wall portion 42 with the tip portion 60b of the jig 60, the tip portion 60b of the jig 60 is inserted into the through hole 66 of the rigid portion 31 of the outer sealing member 30. Can be inserted. That is, the tip portion 60b of the jig 60 can be easily and smoothly hooked on the connecting portion 34b of the outer seal member 30.

以上、本発明の好ましい実施形態を参照しながら本発明を図示して説明したが、当業者にとって特許請求の範囲に記載された発明の範囲から逸脱することなく、形式および詳細の変更が可能であることが理解されるであろう。このような変更、改変および修正は本発明の範囲に包含されるはずである。 Although the present invention has been illustrated and described above with reference to preferred embodiments of the present invention, those skilled in the art can change the form and details without departing from the scope of the invention described in the claims. It will be understood that there is. Such changes, modifications and modifications should be included within the scope of the invention.

例えば、密封装置のリップの形状および数は、上記のものに限定されない。 For example, the shape and number of lips of the sealing device are not limited to those described above.

上記の実施形態では、内側部材である内輪６が回転部材であり、外側部材である外輪８が静止部材である。しかし、本発明は、上記実施形態に限定されず、互いに相対回転する複数の部材の密封に適用されうる。例えば、内側部材が静止し、外側部材が回転してもよいし、これらの部材のすべてが回転してもよい。 In the above embodiment, the inner ring 6 which is an inner member is a rotating member, and the outer ring 8 which is an outer member is a stationary member. However, the present invention is not limited to the above embodiment, and can be applied to sealing a plurality of members that rotate relative to each other. For example, the inner member may be stationary and the outer member may rotate, or all of these members may rotate.

本発明の態様は、下記の番号付けされた条項にも記載される。 Aspects of the invention are also described in the numbered clauses below.

条項１． 転がり軸受の相対的に回転する内側部材と外側部材との間に配置され、前記内側部材と前記外側部材との間の間隙を封止する密封装置であって、
前記内側部材に固定される環状の内側シール部材と、
前記外側部材の孔の内面に固定される環状の外側シール部材とを備え、
前記外側シール部材は、
剛性材料から形成された剛性部と、
前記剛性部に固定された弾性材料から形成された弾性部とを備え、
前記弾性部は、前記内側シール部材に向けて延びる少なくとも１つのリップを有し、
前記剛性部は、
前記外側部材の孔の内面に嵌め込まれる円筒部分と、
前記円筒部分の大気側の端部から径方向内側に向けて延びる円環部分と、
前記円環部分から大気側に向けて軸線方向に突出する複数の軸線方向突出部分と、
前記軸線方向突出部分の少なくとも１つに形成され、前記外側シール部材を前記外側部材から引っ張り出す治具の先端を引っ掛け可能な少なくとも１つのフック部を有し、
前記外側シール部材は、さらに
前記フック部の径方向外側に位置し、前記治具の前記先端を嵌め入れることが可能な少なくとも１つの案内凹部を有する
ことを特徴とする密封装置。 Clause 1. A sealing device that is arranged between a relatively rotating inner member and an outer member of a rolling bearing and seals a gap between the inner member and the outer member.
An annular inner seal member fixed to the inner member and
It is provided with an annular outer sealing member fixed to the inner surface of the hole of the outer member.
The outer seal member is
Rigid parts formed from rigid materials and
It is provided with an elastic portion formed of an elastic material fixed to the rigid portion, and has an elastic portion.
The elastic portion has at least one lip extending towards the inner sealing member.
The rigid part is
A cylindrical portion fitted into the inner surface of the hole of the outer member and
An annular portion extending radially inward from the atmosphere-side end of the cylindrical portion,
A plurality of axially projecting portions extending in the axial direction from the annulus portion toward the atmosphere, and
It has at least one hook portion formed on at least one of the axially protruding portions and capable of hooking the tip of a jig for pulling out the outer sealing member from the outer member.
The outer sealing member is further located radially outward of the hook portion and has at least one guide recess into which the tip of the jig can be fitted.

条項２． 前記剛性部は、前記軸線方向突出部分の少なくとも１つと前記円環部分を貫通する少なくも１つの貫通孔を有し、前記貫通孔によって前記軸線方向突出部分に前記フック部が設けられ、
前記弾性部は、前記剛性部の前記貫通孔を閉塞するように、前記剛性部の前記円環部分と前記軸線方向突出部分を被覆し、
前記弾性部は、前記剛性部の前記貫通孔を閉塞する前記弾性部の部分の軸受内部側の面に形成された、貫通しない少なくとも１つの穴を有しており、
前記剛性部の前記貫通孔の内部に、前記弾性部の前記穴が配置され、
前記案内凹部は、前記剛性部の前記貫通孔を閉塞する前記弾性部の部分の大気側の面に形成されている
ことを特徴とする条項１に記載の密封装置。 Clause 2. The rigid portion has at least one of the axially protruding portions and at least one through hole penetrating the annular portion, and the through hole provides the hook portion in the axially protruding portion.
The elastic portion covers the annular portion and the axially protruding portion of the rigid portion so as to close the through hole of the rigid portion.
The elastic portion has at least one non-penetrating hole formed on the inner surface of the bearing of the portion of the elastic portion that closes the through hole of the rigid portion.
The hole of the elastic portion is arranged inside the through hole of the rigid portion.
The sealing device according to Clause 1, wherein the guide recess is formed on a surface of the elastic portion of the rigid portion on the atmosphere side that closes the through hole of the rigid portion.

この条項によれば、剛性部の軸線方向突出部分の少なくとも１つから円環部分まで形成された貫通孔によってフック部が設けられている。貫通孔は弾性部で閉塞されており、貫通孔の内部に、弾性部の一方の面に形成された穴と、弾性部の他方の面に形成された案内凹部が配置されている。弾性部の穴と案内凹部は弾性部を貫通していないので、密封装置は使用時においては密封性を有する。密封装置を転がり軸受から引っ張り出す時には、案内凹部と穴の間の壁を治具の先端で突き破ることによって、治具の先端を剛性部のフック部に簡単かつ円滑に引っ掛けることができる。 According to this clause, the hook portion is provided by a through hole formed from at least one of the axially protruding portions of the rigid portion to the annular portion. The through hole is closed by an elastic portion, and a hole formed on one surface of the elastic portion and a guide recess formed on the other surface of the elastic portion are arranged inside the through hole. Since the holes in the elastic portion and the guide recesses do not penetrate the elastic portion, the sealing device has a sealing property during use. When the sealing device is pulled out from the rolling bearing, the tip of the jig can be easily and smoothly hooked on the hook portion of the rigid portion by penetrating the wall between the guide recess and the hole with the tip of the jig.

条項３． 前記内側シール部材は、前記内側部材に固定されるスリーブと、前記スリーブの大気側の端部から径方向外側に広がるフランジとを有しており、
前記外側シール部材の前記少なくとも１つのリップは、前記スリーブに摺動可能に接触するシールリップを有し、
前記外側シール部材の前記弾性部は、前記内側シール部材の前記フランジに向けて延びる円筒状の筒壁部分を備え、前記外側シール部材の前記剛性部の前記軸線方向突出部分は前記フランジに向けて延び前記筒壁部分に埋設されており、前記筒壁部分と前記フランジとの間には間隙が設けられている
ことを特徴とする条項１または２に記載の密封装置。 Clause 3. The inner sealing member has a sleeve fixed to the inner member and a flange extending radially outward from the atmosphere-side end of the sleeve.
The at least one lip of the outer sealing member has a sealing lip that slidably contacts the sleeve.
The elastic portion of the outer sealing member comprises a cylindrical tubular wall portion extending toward the flange of the inner sealing member, and the axially projecting portion of the rigid portion of the outer sealing member faces the flange. The sealing device according to Article 1 or 2, wherein the sealing device extends and is embedded in the cylinder wall portion, and a gap is provided between the cylinder wall portion and the flange.

この場合には、外部からの異物が密封装置に侵入しようとしても、多くの異物が、外側シール部材の筒壁部分、または内側シール部材のフランジによって跳ね返される。筒壁部分とフランジとの間の間隙を通過した異物がダストリップに到達するが、この間隙を小さく設定することによって、ダストリップに到達する異物の量を削減することができる。筒壁部分は、これに埋設された複数の軸線方向突出部分で補強されているので、異物から受ける力が強くても、力に耐えることができる。 In this case, even if foreign matter from the outside tries to enter the sealing device, many foreign matter is repelled by the cylinder wall portion of the outer sealing member or the flange of the inner sealing member. Foreign matter that has passed through the gap between the cylinder wall portion and the flange reaches the dust strip, and by setting this gap small, the amount of foreign matter that reaches the dust strip can be reduced. Since the tubular wall portion is reinforced by a plurality of axially projecting portions embedded therein, it can withstand the force even if the force received from the foreign matter is strong.

１，６１ 密封装置
２ 転がり軸受
６ 内輪（内側部材）
８ 外輪（外側部材）
８Ａ 孔
２０ 内側シール部材
２２ スリーブ
２４ フランジ
２６ 外側スリーブ
３０ 外側シール部材
３１ 剛性部
３２ 円筒部分
３３ 円環部分
３４ 軸線方向突出部分
３４ｂ 連結部（フック部）
３５ 内側延長部分
３６，６６ 貫通孔
４０ 弾性部
４４ シールリップ
４５ ダストリップ
５２，６９ 案内凹部
５４ 穴
６０ 治具
６０ａ ハンドル部
６０ｂ 先端部 1,61 Sealing device 2 Rolling bearing 6 Inner ring (inner member)
8 outer ring (outer member)
8A Hole 20 Inner seal member 22 Sleeve 24 Flange 26 Outer sleeve 30 Outer seal member 31 Rigid part 32 Cylindrical part 33 Circular part 34 Axial protruding part 34b Connecting part (hook part)
35 Inner extension part 36, 66 Through hole 40 Elastic part 44 Seal lip 45 Dustrip 52, 69 Guide recess 54 Hole 60 Jig 60a Handle part 60b Tip part

Claims (2)

転がり軸受の相対的に回転する内側部材と外側部材との間に配置され、前記内側部材と前記外側部材との間の間隙を封止する密封装置であって、
前記内側部材に固定される環状の内側シール部材と、
前記外側部材の孔の内面に固定される環状の外側シール部材とを備え、
前記外側シール部材は、
剛性材料から形成された剛性部と、
前記剛性部に固定された弾性材料から形成された弾性部とを備え、
前記弾性部は、前記内側シール部材に向けて延びる少なくとも１つのリップを有し、
前記剛性部は、
前記外側部材の孔の内面に嵌め込まれる円筒部分と、
前記円筒部分の大気側の端部から径方向内側に向けて延びる円環部分と、
前記円環部分から大気側に向けて軸線方向に突出する複数の軸線方向突出部分と、
前記軸線方向突出部分の少なくとも１つに形成され、前記外側シール部材を前記外側部材から引っ張り出す治具の先端を引っ掛け可能な少なくとも１つのフック部を有し、
前記外側シール部材は、さらに
前記フック部の径方向外側に位置し、前記治具の前記先端を嵌め入れることが可能な少なくとも１つの案内凹部を有する
ことを特徴とする密封装置。 A sealing device that is arranged between a relatively rotating inner member and an outer member of a rolling bearing and seals a gap between the inner member and the outer member.
An annular inner seal member fixed to the inner member and
It is provided with an annular outer sealing member fixed to the inner surface of the hole of the outer member.
The outer seal member is
Rigid parts formed from rigid materials and
It is provided with an elastic portion formed of an elastic material fixed to the rigid portion, and has an elastic portion.
The elastic portion has at least one lip extending towards the inner sealing member.
The rigid part is
A cylindrical portion fitted into the inner surface of the hole of the outer member and
An annular portion extending radially inward from the end of the cylindrical portion on the atmosphere side,
A plurality of axially projecting portions extending in the axial direction from the annulus portion toward the atmosphere, and
It has at least one hook portion formed on at least one of the axially protruding portions and capable of hooking the tip of a jig for pulling out the outer sealing member from the outer member.
The outer sealing member is further located radially outward of the hook portion and has at least one guide recess into which the tip of the jig can be fitted. 前記剛性部は、前記軸線方向突出部分の少なくとも１つと前記円環部分を貫通する少なくも１つの貫通孔を有し、前記貫通孔によって前記軸線方向突出部分に前記フック部が設けられ、
前記弾性部は、前記剛性部の前記貫通孔を閉塞するように、前記剛性部の前記円環部分と前記軸線方向突出部分を被覆し、
前記弾性部は、前記剛性部の前記貫通孔を閉塞する前記弾性部の部分の軸受内部側の面に形成された、貫通しない少なくとも１つの穴を有しており、
前記剛性部の前記貫通孔の内部に、前記弾性部の前記穴が配置され、
前記案内凹部は、前記剛性部の前記貫通孔を閉塞する前記弾性部の部分の大気側の面に形成されている
ことを特徴とする請求項１に記載の密封装置。 The rigid portion has at least one of the axially protruding portions and at least one through hole penetrating the annular portion, and the through hole provides the hook portion in the axially protruding portion.
The elastic portion covers the annular portion and the axially protruding portion of the rigid portion so as to close the through hole of the rigid portion.
The elastic portion has at least one non-penetrating hole formed on the inner surface of the bearing of the portion of the elastic portion that closes the through hole of the rigid portion.
The hole of the elastic portion is arranged inside the through hole of the rigid portion.
The sealing device according to claim 1, wherein the guide recess is formed on an atmosphere-side surface of the elastic portion that closes the through hole of the rigid portion.
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JP2001355710A (en) * 2000-06-13 2001-12-26 Nsk Ltd One-way clutch-built-in type pulley device
JP4863243B2 (en) * 2001-07-18 2012-01-25 内山工業株式会社 Sealing device with encoder
CN100449183C (en) * 2004-03-23 2009-01-07 Nok株式会社 Sealing device with rotation detecting element
ES2564082T3 (en) * 2009-10-28 2016-03-17 Aktiebolaget Skf Gasket with a grip portion for bearing, particularly for bearing used in a wind turbine
JP2016151319A (en) * 2015-02-18 2016-08-22 Nok株式会社 Sealing device
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