JP2014009752A - Oil seal - Google Patents

Oil seal Download PDF

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Publication number
JP2014009752A
JP2014009752A JP2012146748A JP2012146748A JP2014009752A JP 2014009752 A JP2014009752 A JP 2014009752A JP 2012146748 A JP2012146748 A JP 2012146748A JP 2012146748 A JP2012146748 A JP 2012146748A JP 2014009752 A JP2014009752 A JP 2014009752A
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Japan
Prior art keywords
oil seal
recess
protrusion
peripheral surface
seal
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JP2012146748A
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Japanese (ja)
Inventor
Tateki Shimohara
干城 下原
Nobuhiro Nishimura
宣宏 西村
Masamichi Nagashima
正道 永嶋
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Nok Corp
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Nok Corp
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Priority to JP2012146748A priority Critical patent/JP2014009752A/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
    • F16C33/783—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
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm

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

Abstract

PROBLEM TO BE SOLVED: To provide an oil seal to be attached to between an outer race and an inner race of a bearing so as to suppress grease leakage and entrance of external foreign matter, the oil seal achieving strong securing to a mating fitting member without using adhesive, thereby preventing falling of the oil seal and corotation due to shear resistance during rotation.SOLUTION: An oil seal is formed of a rubber elastic body integrally including a stationary part secured to a fitting member that is one of an outer race and an inner race, and a seal lip slidably and closely contacted with the other, namely a mating slide member. The stationary part includes a projection that projects in a radial direction toward the fitting member. The projection is inserted into a recess disposed on the fitting member, and is compress-deformed in an axial direction when inserted into the recess.

Description

本発明は、軸受の外輪および内輪間に装着されることによりグリースの漏洩および外部異物の侵入を抑制するオイルシールに関する。本発明のオイルシールは例えば、風力発電装置のピッチ・ヨー駆動部に装着する軸受に用いられ、またはその他の一般機械に装着する軸受に用いられる。   The present invention relates to an oil seal that is mounted between an outer ring and an inner ring of a bearing to suppress leakage of grease and intrusion of external foreign matter. The oil seal of the present invention is used, for example, as a bearing mounted on a pitch / yaw drive unit of a wind power generator or a bearing mounted on another general machine.

風力発電装置のピッチ・ヨー駆動部に装着する軸受には、内部グリースの漏洩および外部異物（雨水やダストなど）の侵入を抑制するため、オイルシールが使用されている。オイルシールとしては、装着性を良好ならしめるため、ゴム状弾性体（弾性体ゴム）のみよりなる押し出し成形品が用いられている（押し出し成形によって紐状のオイルシール素材を成形し、所定の長さで切断し、素材を環状にするため両端部を接合する）。   Oil seals are used for bearings mounted on the pitch / yaw drive of wind power generators in order to suppress leakage of internal grease and intrusion of external foreign matters (rainwater, dust, etc.). As an oil seal, an extrusion molded product made only of a rubber-like elastic body (elastic rubber) is used in order to improve wearability (a string-like oil seal material is formed by extrusion molding to a predetermined length. Cut at the end and join both ends to make the material annular).

しかしながら、オイルシールの固定が十分でない場合、グリース給脂圧や内圧の発生によってオイルシールが脱落したり、回転時のせん断抵抗によってオイルシールが相手摺動部材に対し共回りしたりすることが懸念される。   However, if the oil seal is not sufficiently fixed, the oil seal may drop due to the occurrence of grease supply pressure or internal pressure, or the oil seal may rotate together with the mating sliding member due to shear resistance during rotation. Is done.

また、本発明に対する先行技術として図３に示すオイルシール５１が存在し、このオイルシール５１はその脱落や回転時のせん断抵抗による共回りを防止するため、軸方向に突出する突起５２を設け、対応して相手取付部材５３に凹部５４を設け、突起５２および凹部５４の内面のいずれか一方または両方に凹凸形状の圧入代５５を設けるとともに、凹部５４にシラン系接着剤５６を介して突起５２を圧入嵌合するものである（特許文献１参照）。   Further, as a prior art to the present invention, there is an oil seal 51 shown in FIG. 3, and this oil seal 51 is provided with a protrusion 52 protruding in the axial direction in order to prevent the oil seal 51 from co-rotating due to dropping or shearing resistance during rotation, Correspondingly, a concave portion 54 is provided on the mating attachment member 53, and a concave and convex press-fitting allowance 55 is provided on one or both of the projection 52 and the inner surface of the concave portion 54. Is press-fitted (see Patent Document 1).

しかしながらこの先行技術では、オイルシール５１の固定にシラン系接着剤５６を用いるため、その塗布工程や乾燥工程などに多くの手間がかかる不都合がある。また、軸受に用いるオイルシール５１については一般に交換作業が容易であることが求められるところ、接着剤５６による固着部を剥がすのは容易でない。また、オイルシール５１の軸方向一方の端面に設けられた突起５２は一般に、軸方向他方へ向けて抜けやすい。   However, in this prior art, since the silane-based adhesive 56 is used for fixing the oil seal 51, there is a disadvantage that a lot of labor is required for the coating process and the drying process. In addition, the oil seal 51 used for the bearing is generally required to be easily replaced, but it is not easy to peel off the fixing portion by the adhesive 56. In addition, the protrusion 52 provided on one end surface in the axial direction of the oil seal 51 is generally easily removed toward the other axial direction.

特開２０１１−２７２３５号公報JP 2011-27235 A

本発明は以上の点に鑑みて、接着剤を用いることなくオイルシールを相手取付部材に強固に固定することができ、もってオイルシールの脱落や回転時のせん断抵抗によるオイルシールの共回りを防止することができるオイルシールを提供することを目的とする。また加えて、グリース給脂圧や内圧が作用しても傾きにくい構造のオイルシールを提供することを目的とする。   In view of the above points, the present invention can firmly fix an oil seal to a mating mounting member without using an adhesive, thereby preventing the oil seal from falling off or rotating together due to shear resistance during rotation. It is an object to provide an oil seal that can be used. In addition, another object of the present invention is to provide an oil seal having a structure that hardly tilts even when grease supply pressure or internal pressure is applied.

上記目的を達成するため、本発明の請求項１によるオイルシールは、軸受の外輪および内輪間に装着されることによりグリースの漏洩および外部異物の侵入を抑制するオイルシールであって、前記外輪および内輪のいずれか一方である取付部材に固定される固定部と、他方である相手摺動部材に摺動可能に密接するシールリップとを一体に備えてゴム状弾性体よりなり、前記固定部は、前記取付部材へ向けて径方向に突出する突起を備え、前記突起は、前記取付部材に設けた凹部に挿入されるとともに前記凹部に挿入されたときに軸方向に圧縮変形することを特徴とする。   In order to achieve the above object, an oil seal according to claim 1 of the present invention is an oil seal that is mounted between an outer ring and an inner ring of a bearing to suppress leakage of grease and intrusion of external foreign matters, A fixed part fixed to the mounting member which is one of the inner rings and a seal lip which is slidably in close contact with the other sliding member which is the other are integrally formed of a rubber-like elastic body, and the fixed part is A protrusion projecting radially toward the mounting member, and the protrusion is inserted into a recess provided in the mounting member and compressively deformed in the axial direction when inserted into the recess. To do.

また、本発明の請求項２によるオイルシールは、上記した請求項１記載のオイルシールにおいて、前記突起は、前記凹部に挿入されたときに前記凹部の内面に密接するひげ状リップを所要数備え、前記ひげ状リップは、前記凹部に挿入されたときに径方向へ倒れるように弾性変形することを特徴とする。   The oil seal according to claim 2 of the present invention is the oil seal according to claim 1, wherein the protrusion has a required number of whisker-like lips that come into close contact with the inner surface of the recess when inserted into the recess. The whisker-like lip is elastically deformed so as to fall in the radial direction when inserted into the recess.

また、本発明の請求項３によるオイルシールは、上記した請求項１または２記載のオイルシールにおいて、前記固定部は、その周面に前記突起が設けられることにより前記周面が大気側周面と機内側周面とに分けられ、前記大気側周面の軸方向幅は前記機内側周面の軸方向幅よりも大きく設定されていることを特徴とする。   The oil seal according to claim 3 of the present invention is the oil seal according to claim 1 or 2, wherein the fixed portion is provided with the protrusion on the peripheral surface thereof, so that the peripheral surface is the atmosphere side peripheral surface. The axial width of the atmosphere side circumferential surface is set to be larger than the axial width of the aircraft inner circumferential surface.

更にまた、本発明の請求項４によるオイルシールは、上記した請求項１、２または３記載のオイルシールにおいて、当該オイルシールは、風力発電装置の軸受部に使用されることを特徴とする。   Furthermore, an oil seal according to claim 4 of the present invention is the oil seal according to claim 1, 2, or 3, wherein the oil seal is used in a bearing portion of a wind power generator.

上記構成を備える本発明において、オイルシールは、軸受の外輪および内輪のいずれか一方である取付部材に固定される固定部と、他方である相手摺動部材に摺動可能に密接するシールリップとを一体に備えてゴム状弾性体によって成形されている。固定部は、取付部材へ向けて径方向に突出する突起を備え、この突起は、取付部材に設けた凹部に挿入されるとともに凹部に挿入されたときに軸方向に圧縮変形するものとされている。したがって径方向に突出する突起は凹部に挿入されたとき軸方向に抜けにくいとともに、軸方向に抜けにくい突起に凹部に対する圧縮代が設定されているため、突起はますます軸方向に抜けにくい構造とされている。   In the present invention having the above-described configuration, the oil seal includes a fixing portion that is fixed to the mounting member that is one of the outer ring and the inner ring of the bearing, and a seal lip that is slidably in close contact with the other sliding member that is the other. Are integrally formed with a rubber-like elastic body. The fixing portion includes a protrusion that protrudes in the radial direction toward the attachment member, and the protrusion is inserted into a recess provided in the attachment member and is compressed and deformed in the axial direction when inserted into the recess. Yes. Therefore, the protrusion that protrudes in the radial direction is difficult to come off in the axial direction when it is inserted into the recess, and the protrusion is difficult to come off in the axial direction. Has been.

また、突起として、凹部に挿入されたときに凹部の内面に密接するひげ状リップを所要数備え、このひげ状リップを凹部に挿入されたときに径方向へ倒れるように弾性変形するものとすることが考えられる。この場合、突起を凹部へ挿入するときにひげ状リップが径方向へ倒れるように弾性変形することから突起を凹部へ挿入しやすいとともに、突起が凹部から抜ける方向については、径方向へ倒れるように弾性変形したひげ状リップがくさび効果を発揮するため、突起が凹部から抜けにくい構造とされている。   Further, as a protrusion, a required number of whisker-like lips that are in close contact with the inner surface of the concave part when inserted into the concave part are provided, and the whisker-like lip is elastically deformed so as to fall in the radial direction when inserted into the concave part. It is possible. In this case, when the protrusion is inserted into the recess, the whisker-like lip is elastically deformed so as to fall in the radial direction, so that the protrusion can be easily inserted into the recess, and the direction in which the protrusion comes out of the recess is tilted in the radial direction. Since the elastically deformed whisker-like lip exhibits a wedge effect, the protrusion is difficult to be removed from the recess.

また、固定部の周面に突起を設けると、固定部の周面は突起によって大気側周面と機内側周面とに分けられることになるが、このとき大気側周面の軸方向幅が機内側周面の軸方向幅よりも小さいと傾きに対する受け面が狭いため、グリース給脂圧や内圧が作用したときにオイルシールが傾きやすくなる。これに対しては反対に、大気側周面の軸方向幅を機内側周面の軸方向幅よりも大きく設定することが考えられ、これによれば傾きに対する受け面が広いため、オイルシールが傾きにくくなる。   In addition, when a protrusion is provided on the peripheral surface of the fixed part, the peripheral surface of the fixed part is divided by the protrusion into an atmosphere side peripheral surface and an aircraft inner peripheral surface. If the width is smaller than the axial width of the inner peripheral surface of the machine, the receiving surface against the inclination is narrow, so that the oil seal is easily inclined when grease supply pressure or internal pressure is applied. On the other hand, it is conceivable that the axial width of the atmosphere side circumferential surface is set to be larger than the axial width of the aircraft inner circumferential surface. It becomes difficult to tilt.

尚、軸受の外輪および内輪間にオイルシールを装着するには、オイルシールを内輪に固定して外輪と摺接させる第１の態様（アウターリップ仕様）と、反対にオイルシールを外輪に固定して内輪と摺接させる第２の態様（インナーリップ仕様）とが考えられるところ、本発明はこの第１および第２の態様を双方共に対象とする。したがってアウターリップ仕様では、固定部の外周側にシールリップが設けられるとともに固定部の内周側に突起が設けられ、インナーリップ仕様では反対に、固定部の内周側にシールリップが設けられるとともに固定部の外周側に突起が設けられる。   In order to install an oil seal between the outer ring and the inner ring of the bearing, the oil seal is fixed to the inner ring and the oil seal is fixed to the outer ring. Thus, the second aspect (inner lip specification) for sliding contact with the inner ring can be considered, and the present invention covers both the first and second aspects. Therefore, in the outer lip specification, a seal lip is provided on the outer peripheral side of the fixed portion and a protrusion is provided on the inner peripheral side of the fixed portion. On the contrary, in the inner lip specification, a seal lip is provided on the inner peripheral side of the fixed portion. A protrusion is provided on the outer peripheral side of the fixed portion.

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

すなわち、本発明においては上記したように、取付部材へ向けて径方向に突出する突起が設けられ、突起が取付部材に設けた凹部に挿入されるとともに軸方向に圧縮変形するものとされているために、突起を凹部に挿入することによってオイルシールを相手取付部材に強固に固定することが可能とされている。したがって本発明所期の目的どおり、接着剤を用いることなくオイルシールを相手取付部材に強固に固定することができ、もってオイルシールの脱落や回転時のせん断抵抗によるオイルシールの共回りを防止することができる。また、オイルシールの固定に接着剤を用いないため、オイルシールの着脱作業が容易である。また、突起にひげ状リップを設けることにより突起を凹部へ挿入しやすいとともに突起が凹部から抜けにくい構造を実現することができ、大気側周面の軸方向幅を機内側周面の軸方向幅より大きく設定することによりオイルシールが傾きにくい構造を実現することができる。オイルシールが風力発電装置の軸受部に使用される場合には、この分野に使用されるオイルシールにおいて上記の作用効果を獲得することができる。   That is, in the present invention, as described above, the protrusion protruding in the radial direction toward the attachment member is provided, and the protrusion is inserted into the recess provided in the attachment member and is compressed and deformed in the axial direction. For this reason, it is possible to firmly fix the oil seal to the counterpart mounting member by inserting the protrusion into the recess. Therefore, as the intended purpose of the present invention, the oil seal can be firmly fixed to the counterpart mounting member without using an adhesive, thereby preventing the oil seal from collapsing due to falling off of the oil seal or shear resistance during rotation. be able to. In addition, since no adhesive is used to fix the oil seal, the oil seal can be easily attached and detached. In addition, by providing a whisker-like lip on the protrusion, it is possible to realize a structure in which the protrusion can be easily inserted into the recess and the protrusion is difficult to be removed from the recess, and the axial width of the atmosphere side peripheral surface is the axial width of the inner peripheral surface. By setting it larger, it is possible to realize a structure in which the oil seal is difficult to tilt. When the oil seal is used for the bearing portion of the wind power generator, the above-described effects can be obtained in the oil seal used in this field.

本発明の実施例に係るオイルシールの要部断面図Sectional drawing of the principal part of the oil seal which concerns on the Example of this invention 同オイルシールにおけるひげ状リップ付き突起を凹部に挿入した状態の断面図Sectional view of the oil seal with a whiskered lip projection inserted into the recess 従来例に係るオイルシールの要部断面図Cross section of the main part of the oil seal according to the conventional example

本発明には、以下の実施形態が含まれる。
（１−１）本発明のオイルシールは、風力発電装置の軸受部に使用され、内部にあるグリースの流出を防止し、外部からの雨水・ダストの浸入を防止する。
（１−２）軸受の内部には軸受の潤滑を目的としてグリースが封入される。グリースは定期的に給脂され、給脂時に内部圧力が発生するため、シールは内圧で外れない構造が望ましい。
（１−３）シールの寿命は機械の寿命より短いため、定期交換が必要となる。シールの交換の際は高所での作業となるため、装着のし易さが望まれる。
（１−４）その一方で、装着性を重視し過ぎるとシールの固定力が低下し、軸の回転（摺動抵抗）によりシールが供回りをしてしまう可能性があるため、リップの摺動抵抗に対し固定力は大きい必要がある。
（１−５）尚、対象シールは最大で数ｍの直径となることがある。製造には一般的に押し出し成形が選定されるため、シール内部に金属環などの固定力を向上させる部品を設置することはできない。
（１−６）従来形状では、シールの固定力が弱く、リップの摺動抵抗の影響によりシールの供回りが発生している。また給脂時の圧力の影響によりシールが大気側へ持ち上がるように変形し、リップとハウジングの間に隙間が発生する可能性がある。隙間は外部からの異物浸入要因となる。 The present invention includes the following embodiments.
(1-1) The oil seal of the present invention is used for a bearing portion of a wind turbine generator, and prevents internal grease from flowing out and prevents rainwater and dust from entering from the outside.
(1-2) Grease is sealed inside the bearing for the purpose of lubricating the bearing. Grease is periodically lubricated, and internal pressure is generated during lubrication. Therefore, it is desirable that the seal has a structure that does not come off with the internal pressure.
(1-3) Since the life of the seal is shorter than the life of the machine, regular replacement is required. When exchanging the seal, the work is performed at a high place, so that it is desired to be easily mounted.
(1-4) On the other hand, if too much emphasis is placed on the wearability, the fixing force of the seal decreases, and the seal may rotate due to the rotation of the shaft (sliding resistance). The fixing force needs to be large against the dynamic resistance.
(1-5) The target seal may have a diameter of several meters at the maximum. Since extrusion is generally selected for manufacturing, it is not possible to install a part that improves the fixing force such as a metal ring inside the seal.
(1-6) In the conventional shape, the sealing force of the seal is weak, and the seal is rotated due to the influence of the sliding resistance of the lip. Further, the seal may be deformed so as to be lifted to the atmosphere side due to the influence of the pressure at the time of lubrication, and a gap may be generated between the lip and the housing. The gap becomes a cause of foreign matter intrusion from the outside.

（２−１）本発明ではシールの供回り防止のため、突起（取付部）の形状をゴムを圧縮する形状へ変更し、固定力の向上を図る。突起は挿入性向上のため、ひげリップ付きの形状とする。
（２−２）また、大気側のゴムガイド幅を拡大することで、圧力によるシールの大気側への挙動を抑制し、安定したシール性の確保とシールの脱落防止を図る。 (2-1) In the present invention, in order to prevent the seal from rotating, the shape of the protrusion (attachment portion) is changed to a shape that compresses rubber to improve the fixing force. The protrusion has a shape with a beard lip for improved insertion.
(2-2) Also, by expanding the rubber guide width on the atmosphere side, the behavior of the seal to the atmosphere side due to pressure is suppressed, and stable sealing performance is secured and the seal is prevented from falling off.

（３−１）本発明によれば、突起を圧縮形状とすることにより固定力を向上させ、シールが供回りするのを防止することができる。
（３−２）また、大気側のゴムガイド幅を拡大することによりシールの変形を抑制し、給脂時にリップとハウジングの間に隙間が発生するのを防止することができる。 (3-1) According to the present invention, it is possible to improve the fixing force by making the protrusions into a compressed shape, and to prevent the seal from circulating.
(3-2) Further, by expanding the rubber guide width on the atmosphere side, it is possible to suppress the deformation of the seal, and to prevent a gap from being generated between the lip and the housing during lubrication.

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

図１は、本発明の実施例に係るオイルシール１１を示している。当該実施例に係るオイルシール１１は、風力発電装置のピッチ・ヨー駆動部に装着する軸受に使用されるものであって、軸受の外輪６１および内輪７１の間に装着されることにより内部グリースの漏洩および外部異物（雨水やダストなど）の侵入を抑制する。図１における下方が機内側Ａ、上方が大気側Ｂである。また当該実施例に係るオイルシール１１は、内輪７１に固定されて外輪６１と摺接する上記第１の態様（アウターリップ仕様）に属する。   FIG. 1 shows an oil seal 11 according to an embodiment of the present invention. The oil seal 11 according to this embodiment is used for a bearing to be mounted on a pitch / yaw drive unit of a wind turbine generator, and is mounted between the outer ring 61 and the inner ring 71 of the bearing to thereby prevent internal grease. Controls leakage and entry of foreign objects (rainwater, dust, etc.). The lower side in FIG. 1 is the aircraft inner side A, and the upper side is the atmosphere side B. The oil seal 11 according to this embodiment belongs to the first aspect (outer lip specification) fixed to the inner ring 71 and in sliding contact with the outer ring 61.

オイルシール１１は、内輪７１の外周部に固定される環状の固定部１２と、外輪６１に摺動可能に密接する環状のシールリップ２０，２１とを一体に備え、所定のゴム状弾性体によって成形されている。芯金などの補強体は備えられておらず、ゴム状弾性体のみよりなるいわゆるラバーオンリーの成形品である。またオイルシール１１は接着剤を用いることなく嵌合・圧入のみによって内輪７１の外周部に固定される。   The oil seal 11 is integrally provided with an annular fixed portion 12 fixed to the outer peripheral portion of the inner ring 71 and annular seal lips 20 and 21 that are slidably in close contact with the outer ring 61, and is made of a predetermined rubber-like elastic body. Molded. It is a so-called rubber-only molded article which is not provided with a reinforcing body such as a cored bar and is made only of a rubber-like elastic body. The oil seal 11 is fixed to the outer peripheral portion of the inner ring 71 only by fitting and press-fitting without using an adhesive.

固定部１２において、その内周面に、内輪７１へ向けて径方向内方に突出する環状の突起１３が設けられている。この突起１３は、内輪７１の外周面に設けた環状の凹部７２に挿入されるとともに凹部７２に挿入されたときに軸方向に圧縮変形せしめられるものとされている。   In the fixing portion 12, an annular protrusion 13 that protrudes radially inward toward the inner ring 71 is provided on the inner peripheral surface thereof. The protrusion 13 is inserted into an annular recess 72 provided on the outer peripheral surface of the inner ring 71 and is compressed and deformed in the axial direction when inserted into the recess 72.

また、突起１３の軸方向両端面にそれぞれ、環状のひげ状リップ１５が所要数（図では２本ずつ）設けられている。このひげ状リップ１５は、凹部７２に挿入されたときに凹部７２の内面（内部側面）に密接するものとされ、かつ図２に示すように、凹部７２に挿入されたときに径方向外方（図では左方）へ倒れるように弾性変形せしめられるものとされている。   Further, a required number (two in the figure) of annular whisker-like lips 15 are provided on both axial end faces of the protrusions 13 respectively. This whisker-like lip 15 is in close contact with the inner surface (inner side surface) of the recess 72 when inserted into the recess 72, and radially outward when inserted into the recess 72, as shown in FIG. It is supposed to be elastically deformed so as to fall down (to the left in the figure).

突起１３において、ひげ状リップ１５を除く突起本体部１４は、その軸方向幅ｗ１が凹部７２の軸方向幅ｗ３よりも小さく設定され、ひげ状リップ１５を含む突起１３の全体はその軸方向幅ｗ２が凹部７２の軸方向幅ｗ３よりも大きく設定されている。したがって突起本体部１４と凹部７２の内面（内部側面）との間に間隙（軸方向間隙）１６が設定されるので、この間隙１６がひげ状リップ１５が径方向へ倒れ込むためのスペースとされる。また、突起１３ないし突起本体部１４の先端部（内周端部）は凹部７２の内部底面に届かず、よって突起１３ないし突起本体部１４と凹部７２の内部底面の間にも間隙（径方向間隙）１７が設定される。 In the protrusion 13, the protrusion main body portion 14 excluding the beard-like lip 15 has an axial width w 1 set smaller than the axial width w 3 of the recess 72, and the entire protrusion 13 including the beard-like lip 15 has its axis The direction width w 2 is set larger than the axial width w 3 of the recess 72. Accordingly, a gap (axial gap) 16 is set between the protrusion main body 14 and the inner surface (inner side face) of the recess 72, and this gap 16 is a space for the whistle lip 15 to fall in the radial direction. . Further, the tip portion (inner peripheral end portion) of the protrusion 13 or the protrusion main body portion 14 does not reach the inner bottom surface of the recess 72, so that a gap (radial direction) is also formed between the protrusion 13 or the protrusion main body portion 14 and the inner bottom surface of the recess 72. 17) is set.

上記したように固定部１２の内周面に突起１３が設けられているため、装着時に内輪７１の外周面７１ａに接触する固定部１２の内周面は突起１３によって大気側内周面（大気側周面）１８と機内側内周面（機内側周面）１９とに分けられており、前者の大気側内周面１８の軸方向幅ｗ４のほうが後者の機内側内周面１９の軸方向幅ｗ５よりも大きく設定されている。 Since the protrusion 13 is provided on the inner peripheral surface of the fixing portion 12 as described above, the inner peripheral surface of the fixing portion 12 that comes into contact with the outer peripheral surface 71a of the inner ring 71 at the time of wearing is Side circumferential surface) 18 and inner side inner peripheral surface (inner side inner peripheral surface) 19, and the axial width w 4 of the former atmospheric side inner circumferential surface 18 is greater than that of the inner inner circumferential surface 19 of the latter. It is set larger than the axial width w 5.

上記シールリップ２０，２１は、外輪６１の内周面６１ａに摺動可能に密接する第１シールリップ２０と、外輪６１の端面部６１ｂに摺動可能に密接する第２シールリップ２１との組み合わせにより設定されている。   The seal lips 20, 21 are a combination of the first seal lip 20 slidably in contact with the inner peripheral surface 61 a of the outer ring 61 and the second seal lip 21 slidably in contact with the end surface portion 61 b of the outer ring 61. It is set by.

このうち第１シールリップ２０は、固定部１２の機内側端部から径方向外方であってかつ機内側Ａへ向けて斜めに形成され、その先端部をもって外輪６１の内周面６１ａに摺動可能に密接する。   Of these, the first seal lip 20 is formed radially outward from the machine inner end of the fixed portion 12 and obliquely toward the machine inner A, and the tip of the first seal lip 20 slides on the inner peripheral surface 61 a of the outer ring 61. Closely movable.

一方、第２シールリップ１８は、固定部１２の外周面に設けた環状の外周突起２２の先端部から径方向外方であってかつ機内側Ａへ向けて斜めに形成され、その先端部をもって外輪６１の端面部６１ｂに摺動可能に密接する。   On the other hand, the second seal lip 18 is formed radially outwardly from the tip of the annular outer peripheral projection 22 provided on the outer peripheral surface of the fixed portion 12 and obliquely toward the inner side A, and has the tip. The outer ring 61 is slidably in close contact with the end surface portion 61b.

したがって、これらの配置およびリップ端の向きからして第１シールリップ２０は主に対グリースのシールを担当し、第２シールリップ２１は主に対外部異物のシールを担当する。   Therefore, the first seal lip 20 is mainly in charge of sealing against grease, and the second seal lip 21 is mainly in charge of sealing of foreign matter from the arrangement and the direction of the lip end.

上記構成を備えるオイルシール１１において、当該オイルシール１１は、軸受の内輪７１に固定される固定部１２と、外輪６１に摺動可能に密接するシールリップ２０，２１とを一体に備えてゴム状弾性体によって成形されている。固定部１２は、内輪７１へ向けて径方向内方に突出する突起１３を備え、この突起１３は、内輪７１に設けた凹部７２に挿入されるとともに凹部７２に挿入されたときに軸方向に圧縮変形するものとされている。したがって径方向内方に突出する突起１３は凹部７２に挿入されたとき直交する軸方向に抜けにくいとともに、軸方向に抜けにくい突起１３に凹部７２に対する圧縮代が設定されているため、突起１３はますます軸方向に抜けにくい構造とされている。   In the oil seal 11 having the above-described configuration, the oil seal 11 is integrally provided with a fixing portion 12 fixed to the inner ring 71 of the bearing and seal lips 20 and 21 slidably in close contact with the outer ring 61 so as to be rubbery. It is molded by an elastic body. The fixed portion 12 includes a protrusion 13 that protrudes radially inward toward the inner ring 71, and the protrusion 13 is inserted into a recess 72 provided in the inner ring 71 and axially when inserted into the recess 72. It is supposed to be compressed and deformed. Accordingly, the protrusion 13 that protrudes inward in the radial direction is difficult to be removed in the orthogonal axial direction when inserted into the recess 72, and a compression allowance for the recess 72 is set in the protrusion 13 that is difficult to remove in the axial direction. The structure is becoming more difficult to come off in the axial direction.

また、突起１３の軸方向両端面にそれぞれ、ひげ状リップ１５が所要数設けられ、このひげ状リップ１５は凹部７２に挿入されたときに凹部７２の内面に密接するものとされ、かつ凹部７２に挿入されたときに径方向外方へ倒れるように弾性変形するものとされている。したがって突起１３を凹部７２へ挿入するときにひげ状リップ１５が径方向外方へ倒れるように弾性変形するため、突起１３を凹部７２へ挿入しやすいとともに、突起１３が凹部７２から抜ける方向については、径方向外方へ倒れるように弾性変形したひげ状リップ１５がくさび効果を発揮するため、突起１３が凹部７２から抜けにくい構造とされている。   In addition, a required number of whisker-like lips 15 are provided on both axial end surfaces of the protrusion 13, and the whisker-like lips 15 are in close contact with the inner surface of the recess 72 when inserted into the recess 72. It is supposed to be elastically deformed so as to fall outward in the radial direction when inserted into the. Therefore, since the whisker-like lip 15 is elastically deformed so as to fall radially outward when the protrusion 13 is inserted into the recess 72, the protrusion 13 can be easily inserted into the recess 72 and the direction in which the protrusion 13 comes out of the recess 72 is as follows. Since the whisker-like lip 15 elastically deformed so as to fall outward in the radial direction exhibits a wedge effect, the protrusion 13 is structured not to easily come out of the recess 72.

また、固定部１２の大気側内周面１８の軸方向幅ｗ４が機内側内周面１９の軸方向幅ｗ５よりも大きく設定されているため、当該オイルシール１１に機内側Ａからグリース給脂圧や内圧が作用してもオイルシール１１が傾きにくい。すなわち反対に、固定部１２の大気側内周面１８の軸方向幅ｗ４が機内側内周面１９の軸方向幅ｗ５よりも小さく設定されていると、当該オイルシール１１に機内側Ａからグリース給脂圧や内圧が作用したときに、機内側内周面１９が内輪７１の外周面７１ａから浮き上がるとともに大気側内周面１８が内輪７１の外周面７１ａに強く押し付けられると云うようにオイルシール１１が傾きやすいところ、上記構成では、傾きに対する受け面となる大気側内周面１８が広いため、オイルシール１１が大きく傾くのを防止することができる。 In addition, since the axial width w 4 of the atmosphere-side inner circumferential surface 18 of the fixed portion 12 is set to be larger than the axial width w 5 of the machine-side inner circumferential surface 19, the oil seal 11 is greased from the machine-side A. Even if the greasing pressure or the internal pressure acts, the oil seal 11 is difficult to tilt. In other words, on the contrary, if the axial width w 4 of the atmosphere-side inner peripheral surface 18 of the fixed portion 12 is set smaller than the axial width w 5 of the inner-side inner peripheral surface 19, the oil seal 11 has an inner side A When the grease supply pressure or internal pressure is applied, the machine inner peripheral surface 19 is lifted from the outer peripheral surface 71a of the inner ring 71 and the atmosphere side inner peripheral surface 18 is strongly pressed against the outer peripheral surface 71a of the inner ring 71. Where the oil seal 11 is inclined easily, in the above configuration, the atmosphere-side inner peripheral surface 18 that serves as a receiving surface against the inclination is wide, so that the oil seal 11 can be prevented from being greatly inclined.

上記実施例では、アウターリップ仕様のオイルシールについて説明したが、本発明がインナーリップ仕様のオイルシールにも適用されることは上記したとおりである。   In the above embodiment, the oil seal of the outer lip specification has been described. However, as described above, the present invention is also applied to the oil seal of the inner lip specification.

１１ オイルシール
１２ 固定部
１３ 突起
１４ 突起本体部
１５ ひげ状リップ
１６，１７ 間隙
１８ 大気側内周面
１９ 機内側内周面
２０，２１ シールリップ
２２ 外周突起
６１ 外輪
６１ａ 内周面
６１ｂ 端面部
７１ 内輪
７１ａ 外周面
７２ 凹部
Ａ 機内側
Ｂ 大気側 DESCRIPTION OF SYMBOLS 11 Oil seal 12 Fixing part 13 Protrusion 14 Protrusion main body part 15 Whisker-like lip 16, 17 Gap 18 Air | atmosphere inner peripheral surface 19 Inner inner peripheral surface 20, 21 Seal lip 22 Outer peripheral protrusion 61 Outer ring 61a Inner peripheral surface 61b End surface part 71 Inner ring 71a Outer peripheral surface 72 Recessed part A Machine inside B Atmosphere side

Claims (4)

軸受の外輪および内輪間に装着されることによりグリースの漏洩および外部異物の侵入を抑制するオイルシールであって、
前記外輪および内輪のいずれか一方である取付部材に固定される固定部と、他方である相手摺動部材に摺動可能に密接するシールリップとを一体に備えてゴム状弾性体よりなり、
前記固定部は、前記取付部材へ向けて径方向に突出する突起を備え、
前記突起は、前記取付部材に設けた凹部に挿入されるとともに前記凹部に挿入されたときに軸方向に圧縮変形することを特徴とするオイルシール。 An oil seal that is installed between the outer ring and the inner ring of the bearing to suppress grease leakage and intrusion of external foreign matter,
A fixed portion fixed to the mounting member that is one of the outer ring and the inner ring, and a seal lip that is slidably in close contact with the other sliding member that is the other is integrally formed of a rubber-like elastic body.
The fixing portion includes a protrusion protruding in a radial direction toward the mounting member,
The oil seal is characterized in that the protrusion is inserted into a recess provided in the mounting member and is compressed and deformed in the axial direction when inserted into the recess. 請求項１記載のオイルシールにおいて、
前記突起は、前記凹部に挿入されたときに前記凹部の内面に密接するひげ状リップを所要数備え、
前記ひげ状リップは、前記凹部に挿入されたときに径方向へ倒れるように弾性変形することを特徴とするオイルシール。 The oil seal according to claim 1,
The protrusion includes a required number of whisker-like lips that are in close contact with the inner surface of the recess when inserted into the recess,
The oil seal according to claim 1, wherein the whisker-like lip is elastically deformed so as to fall in a radial direction when inserted into the recess. 請求項１または２記載のオイルシールにおいて、
前記固定部は、その周面に前記突起が設けられることにより前記周面が大気側周面と機内側周面とに分けられ、
前記大気側周面の軸方向幅は前記機内側周面の軸方向幅よりも大きく設定されていることを特徴とするオイルシール。 The oil seal according to claim 1 or 2,
The fixed portion is divided into an air-side peripheral surface and an aircraft inner peripheral surface by providing the protrusion on the peripheral surface,
The oil seal according to claim 1, wherein an axial width of the atmosphere-side peripheral surface is set to be larger than an axial width of the machine-side peripheral surface. 請求項１、２または３記載のオイルシールにおいて、
当該オイルシールは、風力発電装置の軸受部に使用されることを特徴とするオイルシール。 The oil seal according to claim 1, 2 or 3,
The oil seal is used for a bearing portion of a wind turbine generator.
JP2012146748A 2012-06-29 2012-06-29 Oil seal Pending JP2014009752A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017065238A1 (en) * 2015-10-16 2017-04-20 Ntn株式会社 Seal structure of slewing bearing

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Publication number Priority date Publication date Assignee Title
JPH0626077A (en) * 1992-07-08 1994-02-01 Hitachi Constr Mach Co Ltd Seal for turning wheel
JPH0925939A (en) * 1995-07-14 1997-01-28 Nippon Thompson Co Ltd Bearing with seal
DE10309383A1 (en) * 2002-03-04 2003-09-18 Imo Ind Momentenlager Stoll & Two-part all-weather seal for wind turbine blade root and bearing
JP2011027235A (en) * 2009-07-29 2011-02-10 Ntn Corp Seal structure of slewing bearing and slewing section support apparatus
WO2012072270A1 (en) * 2010-12-03 2012-06-07 Imo Holding Gmbh Sealing element
JP2012112488A (en) * 2010-11-26 2012-06-14 Ntn Corp Seal structure of turning bearing and turning bearing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0626077A (en) * 1992-07-08 1994-02-01 Hitachi Constr Mach Co Ltd Seal for turning wheel
JPH0925939A (en) * 1995-07-14 1997-01-28 Nippon Thompson Co Ltd Bearing with seal
DE10309383A1 (en) * 2002-03-04 2003-09-18 Imo Ind Momentenlager Stoll & Two-part all-weather seal for wind turbine blade root and bearing
JP2011027235A (en) * 2009-07-29 2011-02-10 Ntn Corp Seal structure of slewing bearing and slewing section support apparatus
JP2012112488A (en) * 2010-11-26 2012-06-14 Ntn Corp Seal structure of turning bearing and turning bearing
WO2012072270A1 (en) * 2010-12-03 2012-06-07 Imo Holding Gmbh Sealing element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017065238A1 (en) * 2015-10-16 2017-04-20 Ntn株式会社 Seal structure of slewing bearing

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