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JP2007247708A - Seal with shaft - Google Patents

Seal with shaft
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Publication number
JP2007247708A
JP2007247708AJP2006069238AJP2006069238AJP2007247708AJP 2007247708 AJP2007247708 AJP 2007247708AJP 2006069238 AJP2006069238 AJP 2006069238AJP 2006069238 AJP2006069238 AJP 2006069238AJP 2007247708 AJP2007247708 AJP 2007247708A
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seal
shaft
ring
dust
protective
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Japanese (ja)
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Takayuki Aihara
孝行 相原
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Nok Corp
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Nok Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce the amount of dust to be sealed by a third seal, to suppress wear of the third seal to be worn by sealing dust, and to prevent dust from intruding into a sealing fluid side due to reduction of tightening allowance caused by early wear so as to improve the service life of a seal with a shaft. <P>SOLUTION: The seal with the shaft is provided with: a first seal 10 provided with a sleeve 11 having a flange part 13 mounted on the shaft 2 and extending in the direction of outside diameter on an atmosphere side A; a second seal 20 provided with a reinforcing ring 21 and a second seal main body part 25 coming into slide-contact with the first seal 10; a first protection ring 30 and a second protection ring 40 fixed on the reinforcing ring 21, having a predetermined interval in the axial direction among the flange part 13 and them, and provided on the atmosphere side A; a third seal 50 provided with a third seal main body part 55 adhering to the flange part 13 and sliding on the first protection ring 30; and a fourth seal 70 provided with a resin-made fourth seal main body part 71 nipped and held by the first protection ring 30 and the second protection ring 40 and sliding in a face contact with the shaft 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

Translated fromJapanese

本発明は、大気側の泥水等のダスト条件が厳しい環境下で使用される農業機械、建築機械等の軸封部をシールするために用いられる軸付きシールに関する。  The present invention relates to a shaft-attached seal used for sealing a shaft seal portion of an agricultural machine, a construction machine or the like used in an environment where dust conditions such as muddy water on the atmosphere side are severe.

従来、大気側の泥水等のダスト条件が厳しい環境下で使用される農業機械、建築機械等の軸封部をシールするために用いられる軸付きシールとしては、図3に示すものが知られている(下記特許文献1参照)。この軸付きシール100は、互に相対動する軸101とハウジング102との間をシールするものであって、第一シール110と、第二シール120と、保護環130と、第三シール140と、ダストシール150と、を備えている。  Conventionally, the shaft seal shown in FIG. 3 is known as a shaft seal used for sealing a shaft seal portion of an agricultural machine or a construction machine used in an environment where dust conditions such as muddy water on the atmosphere side are severe. (See Patent Document 1 below). The shaft-attachedseal 100 seals between theshaft 101 and thehousing 102 that move relative to each other, and includes afirst seal 110, asecond seal 120, aprotective ring 130, and athird seal 140. , And adust seal 150.

第一シール110は、軸方向に延び軸101と嵌合している円筒部112と円筒部112の大気側A端部から外径方向に延びるフランジ部113を有するスリーブ111と、円筒部112の内周側に装着され軸101との間をシールするゴム状弾性体の第一シール本体部115と、を備えている。  Thefirst seal 110 includes asleeve 111 having acylindrical portion 112 extending in the axial direction and fitted to theshaft 101, aflange portion 113 extending in the outer diameter direction from the atmosphere side A end of thecylindrical portion 112, and thecylindrical portion 112. And a rubber-like elastic first sealmain body 115 that is mounted on the inner peripheral side and seals between theshaft 101.

第二シール120は、ハウジング102に嵌合している円筒部122の大気側A端部から外径方向に延びる外向きフランジ部123と密封流体側Bの端部から内径方向に延びる内向きフランジ部124とを有する補強環121と、補強環121の円筒部122と内向きフランジ部124とに接着しているゴム状弾性体の第二シール本体部125と、を備えている。第二シール本体部125は、密封流体側Bに延び第一シール110の円筒部112の外周面に摺動する第一シールリップ126と、大気側Aに延び第一シール110の円筒部112の外周面に摺動する第二シールリップ127および第三シールリップ128と、同じく大気側Aに延びスリーブ111のフランジ部113の密封流体側B端面に摺動する第四シールリップ129とを有し、第一シールリップ126の外周側には径方向の緊迫力を付与するガータスプリング126aが装着されている。  Thesecond seal 120 includes anoutward flange portion 123 extending in the outer diameter direction from the atmospheric end A of thecylindrical portion 122 fitted to thehousing 102 and an inward flange extending in the inner diameter direction from the end of the sealing fluid side B. A reinforcingring 121 having aportion 124, and a rubber-like elastic second sealmain body 125 bonded to thecylindrical portion 122 and theinward flange portion 124 of the reinforcingring 121. Thesecond seal body 125 extends to the sealing fluid side B, slides on the outer peripheral surface of thecylindrical portion 112 of thefirst seal 110, and extends to the atmosphere side A of thecylindrical portion 112 of thefirst seal 110. And asecond seal lip 127 and athird seal lip 128 that slide on the outer peripheral surface, and afourth seal lip 129 that extends to the atmosphere side A and slides on the end surface of theflange portion 113 of thesleeve 111 on the sealing fluid side B.A garter spring 126 a for applying a radial tension force is mounted on the outer peripheral side of thefirst seal lip 126.

保護環130は、スリーブ111のフランジ部113と軸方向所定間隔を有し大気側Aに設けられていて、径方向に延びるフランジ部131の外周部132が第二シール部120の外向きフランジ部123の大気側A端面に当接し、カシメ部123aにてカシメ固定されていて、フランジ部131の内周側端部は密封流体側Bに延びる円筒部133を有している。  Theprotective ring 130 is provided on the atmosphere side A with a predetermined axial distance from theflange portion 113 of thesleeve 111, and the outerperipheral portion 132 of the radially extendingflange portion 131 is the outward flange portion of thesecond seal portion 120. Theflange portion 131 has a cylindrical portion 133 that extends to the sealed fluid side B. Theflange portion 131 is in contact with the atmosphere side A end surface of 123 and fixed by a crimpingportion 123a.

第三シール140は、スリーブ111のフランジ部113に接着し保護環130のフランジ部131の密封流体側B端面に摺動するゴム状弾性体の第三シール本体部145を備えている。  Thethird seal 140 includes a third sealmain body portion 145 made of a rubber-like elastic body that adheres to theflange portion 113 of thesleeve 111 and slides on the sealing fluid side B end surface of theflange portion 131 of theprotective ring 130.

第三シール本体部145は、第一シール本体部115と一体に成形されていて、保護環130のフランジ部131の密封流体側B端面に摺動する内径方向に傾き径方向所定間隔を有して設けられている第一シールリップ146及び第二シールリップ147とを有している。  The thirdseal body portion 145 is formed integrally with the firstseal body portion 115 and has a predetermined interval in the radial direction inclined in the inner diameter direction sliding on the sealing fluid side B end surface of theflange portion 131 of theprotective ring 130. Thefirst seal lip 146 and the second seal lip 147 are provided.

ダストシール150は、第一シール本体部115の大気側A端部に一体で成形されていて外径方向に傾いて延び、保護環130の円筒部133の内周面に摺動するダストシールリップ155を有している。  Thedust seal 150 is formed integrally with the end A on the atmosphere side of the first sealmain body 115, extends with an inclination in the outer diameter direction, and has adust seal lip 155 that slides on the inner peripheral surface of the cylindrical portion 133 of theprotective ring 130. Have.

これにより、ダストシール150で大気側Aより泥水等のダストが浸入するのをシールし、更に、侵入した泥水等のダストは、第三シール140の第一シールリップ146及び第二シールリップ147でシールするので、密封流体側Bに泥水等のダストが侵入する(漏れる)のが防止される。  As a result, the dust seal 150 seals intrusion of dust such as muddy water from the atmosphere side A. Further, the intruded dust such as muddy water is sealed by thefirst seal lip 146 and the second seal lip 147 of thethird seal 140. Therefore, dust such as muddy water is prevented from entering (leaking) into the sealed fluid side B.

しかしながら、従来の上記構成であると、泥水等の使用条件が特に厳しい環境下で使用されたときに、ダストシール150で充分にシールすることが出来ず、ダストシール150を通過した多量の泥水等のダストをシールすることで第三シール140の第一シールリップ146及び第二シールリップ147が早期に摩耗して締め代が低下し、要求寿命に達しないうちに泥水等のダストが密封流体側Bへ浸入するとの不具合が認められた。  However, with the above-described conventional configuration, when the use conditions such as muddy water are used under particularly severe environments, thedust seal 150 cannot sufficiently seal, and a large amount of muddy water or the like that has passed through thedust seal 150. Thefirst seal lip 146 and the second seal lip 147 of thethird seal 140 are quickly worn out to reduce the tightening allowance, and dust such as muddy water moves to the sealed fluid side B before the required life is reached. A problem with intrusion was observed.

なお、下記特許文献2には、第三シール本体部を別体の樹脂で成形し、スリーブのフランジ部と保護環とに摺動させることで第三シール本体部の対摩耗性を改善することが開示されているが、本発明とは目的、構成を異にしている。  InPatent Document 2 below, the third seal main body is molded from a separate resin, and is slid between the sleeve flange and the protective ring to improve the wear resistance of the third seal main body. However, the object and the configuration are different from those of the present invention.

特開2000−193097号公報JP 2000-193097 A特開平08−200515号公報Japanese Patent Application Laid-Open No. 08-200515

本発明は上述の問題点を解決するためになされたものであって、その目的とするところは、第三シールでシールするダストの量を減少し、ダストをシールすることで摩耗する第三シールの摩耗を抑制し、もって早期摩耗に起因する締め代の低下で泥水等のダストが密封流体側に侵入する(漏れる)のを防止し、軸付きシールの寿命を向上することである。  The present invention has been made to solve the above-described problems, and the object of the present invention is to reduce the amount of dust sealed with the third seal and wear the third seal by sealing the dust. In other words, it is possible to prevent the dust such as muddy water from entering (leaking) into the sealed fluid side due to a decrease in the tightening allowance due to the early wear, thereby improving the life of the shaft seal.

上記目的を達成するため、本発明の請求項1に係る軸付きシールは、互に同心的に相対動する軸とハウジングとの間の環状空間に設けられ、密封流体側の密封流体をシールすると共に、大気側の泥水等のダストをシールするものであって、前記軸に装着され、大気側で外径方向に延びるフランジ部を有するスリーブと、前記軸の外周面をシールする第一シール本体部と、を備えた第一シールと、前記ハウジングに装着され、補強環と、前記第一シールに摺動する第二シール本体部と、を備えた第二シールと、前記補強環に固定され、前記フランジ部と軸方向所定間隔を有し大気側に設けられた第一保護環及び第二保護環と、前記フランジ部に接着し前記第一保護環に摺動する第三シール本体部を備えた第三シールと、前記第一保護環と前記第二保護環とに挟持され前記軸に面接触で摺動する樹脂の第四シール本体部を備えた第四シールと、を備えたことを特徴とするものである。  To achieve the above object, a shaft-attached seal according to claim 1 of the present invention is provided in an annular space between a shaft and a housing that move concentrically relative to each other, and seals the sealing fluid on the sealing fluid side. And a sleeve having a flange portion that is attached to the shaft and extends in the outer diameter direction on the atmosphere side, and a first seal body that seals the outer peripheral surface of the shaft. A second seal including a first seal provided with a portion, a reinforcing ring mounted on the housing and sliding on the first seal, and fixed to the reinforcing ring. A first protective ring and a second protective ring provided on the atmosphere side with a predetermined axial distance from the flange part, and a third seal body part that adheres to the flange part and slides on the first protective ring. A third seal provided, the first protective ring and the first It is characterized in that and a fourth seal with the fourth seal body portion of resin is sandwiched between the protective rings to slide in surface contact with the shaft.

更に請求項2に係る軸付きシールは、請求項1に記載の軸付きシールであって、リップ形状からなるゴム状弾性体のリングを前記第四シール本体部と前記第二保護環の円筒部との間に介在させたことを特徴とするものである。  Furthermore, the seal with a shaft according toclaim 2 is the seal with a shaft according to claim 1, wherein a ring of a rubber-like elastic body having a lip shape is connected to the cylindrical portion of the fourth seal body portion and the second protective ring. It is characterized by being interposed between the two.

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

すなわち、上記構成を備えた請求項1に係る軸付きシールにおいては、大気側に位置する第一保護環と第二保護環とで挟持された第四シール本体部が軸に面接触で摺動し、大気側の泥水等のダストがシール内に浸入するのをシールするので、第三シールでシールするダストの量が減少し、ダストをシールすることによる第三シール本体部の摩耗を抑制することができる。したがって、第三シール本体部の早期摩耗に起因する締め代の低下で泥水等のダストに対するシール性が低下し密封流体側にダストが侵入するのを防止することができ、軸付きシールの寿命を向上することができる。  That is, in the seal with a shaft according to claim 1 having the above-described configuration, the fourth seal body portion sandwiched between the first protection ring and the second protection ring located on the atmosphere side slides in surface contact with the shaft. In addition, since dust such as muddy water on the atmosphere side enters the seal, the amount of dust sealed by the third seal is reduced, and the wear of the third seal main body due to sealing the dust is suppressed. be able to. Therefore, it is possible to prevent the dust from entering the sealing fluid side by reducing the sealing performance due to the lowering of the tightening allowance due to the early wear of the third seal body part, and to prevent the dust from entering the sealing fluid side. Can be improved.

また、第四シール本体部は、樹脂で成形されているので低摩擦性に優れ、耐摩耗性が良いので摩耗によるシール性の低下がなく、しかも、軸に面接触で摺動するのでシール面積が大きいため、寿命終期であっても泥水等のダストに対するシール性が良く、第三シールでシールするダストの量を減少できる。  In addition, the fourth seal body is molded with resin, so it has excellent low friction properties and good wear resistance, so there is no deterioration in sealability due to wear, and it slides on the shaft in surface contact, so the seal area Therefore, the sealing performance against dust such as muddy water is good even at the end of life, and the amount of dust sealed with the third seal can be reduced.

更に、これに加えるに請求項2に係る軸付きシールは、リップ形状からなるゴム状弾性体のリングが第四シール本体部と第二保護環の円筒部との間に介在しているので、軸が変動したときであっても軸に対する第四シール本体部の追随性、圧縮安定性を向上することができ、第四シールのシール性を向上することができる。  Furthermore, in addition to this, the shaft seal according toclaim 2 has a rubber-like elastic ring having a lip shape interposed between the fourth seal body portion and the cylindrical portion of the second protective ring. Even when the shaft fluctuates, the followability and compression stability of the fourth seal body with respect to the shaft can be improved, and the sealing performance of the fourth seal can be improved.

以下に図面を参照して、この発明の好適な実施の形態を例示して説明する。  Exemplary embodiments of the present invention will be described below with reference to the drawings.

第一実施形態
図1は、本発明の第一実施例に係る軸付きシールの要部断面を示しており、以下のように構成されている。
1st Embodiment FIG. 1: has shown the principal part cross section of the seal with a shaft which concerns on the 1st Example of this invention, and is comprised as follows.

この軸付きシール1は、互に同心的に相対動する軸2とハウジング3との間の環状空間に設けられるものであって、第一シール10と、第二シール20と、第一保護環30と、第二保護環40と、第三シール50と、ダストシール60と、第四シール70と、を備えている。  The shaft-attached seal 1 is provided in an annular space between theshaft 2 and thehousing 3 which are concentrically moved relative to each other, and includes afirst seal 10, asecond seal 20, and a first protective ring. 30, a secondprotective ring 40, athird seal 50, adust seal 60, and afourth seal 70.

第一シール10は、軸方向に延び軸2と嵌合している円筒部12と円筒部12の大気側A端部から外径方向に延びるフランジ部13とを有するスリーブ11と、円筒部12の内径側に接着し軸2との間をシールするゴム状弾性体の第一シール本体部15と、を備えている。  Thefirst seal 10 includes asleeve 11 having acylindrical portion 12 extending in the axial direction and fitted to theshaft 2, and aflange portion 13 extending in the outer diameter direction from an end portion on the atmosphere side A of thecylindrical portion 12, and thecylindrical portion 12. And a firstelastic seal body 15 made of a rubber-like elastic body that adheres to the inner diameter side of the inner surface and seals between theshaft 2.

第二シール20は、ハウジング3に嵌合している円筒部22の大気側A端部から外径方向に延びる外向きフランジ部23と密封流体側Bの端部から内径方向に延びる内向きフランジ部24とを有する補強環21と、補強環21の円筒部22と内向きフランジ部24とに接着しているゴム状弾性体の第二シール本体部25と、を備えている。第二シール本体部25は、密封流体側Bに延び第一シール10の円筒部12の外周面に摺動する第一シールリップ26と、大気側Aに延び第一シール10の円筒部12の外周面に摺動する軸方向に所定間隔を有して設けられている第二シールリップ27および第三シールリップ28と、同じく大気側Aに延びスリーブ11のフランジ部13の密封流体側B端面に摺動する第四シールリップ29とを有し、第一シールリップ26の外周側には径方向に緊迫力を付与するガータスプリング26aが装着されている。  Thesecond seal 20 has anoutward flange portion 23 extending in the outer diameter direction from the atmospheric end A of thecylindrical portion 22 fitted in thehousing 3 and an inward flange extending in the inner diameter direction from the end of the sealing fluid side B. A reinforcingring 21 having aportion 24, and a second seal body portion 25 made of a rubber-like elastic body bonded to acylindrical portion 22 and aninward flange portion 24 of the reinforcingring 21 are provided. The second seal main body 25 extends to the sealing fluid side B, slides on the outer peripheral surface of thecylindrical portion 12 of thefirst seal 10, and extends to the atmosphere side A of thecylindrical portion 12 of thefirst seal 10. Thesecond seal lip 27 and the third seal lip 28 provided at predetermined intervals in the axial direction sliding on the outer peripheral surface, and the end surface of the sealing fluid side B of theflange portion 13 of thesleeve 11 extending to the atmosphere sideA A garter spring 26a is provided on the outer peripheral side of thefirst seal lip 26 to apply a compressive force in the radial direction.

第一保護環30は、スリーブ11のフランジ部13と軸方向所定間隔を有し大気側Aに設けられていて、径方向に延びる第一保護フランジ部31と、第一保護フランジ部31の外径側端部であって第二シール20の外向きフランジ部23の大気側A端面に当接する第一保護外周部32と、第一保護フランジ部31の内径側端部から密封流体側Bに延びる第一保護円筒部33とを有している。  The firstprotective ring 30 is provided on the atmosphere side A with a predetermined axial distance from theflange portion 13 of thesleeve 11, and extends in the radial direction from the firstprotective flange portion 31 and the firstprotective flange portion 31. A first protective outerperipheral portion 32 that is in contact with the atmosphere side A end surface of theoutward flange portion 23 of thesecond seal 20 from the inner diameter side end portion of the firstprotective flange portion 31 to the sealed fluid side B. The first protectivecylindrical portion 33 extends.

第二保護環40は、第一保護環30の第一保護フランジ部31と軸方向所定間隔を有し大気側Aに設けられていて、径方向に延びる第二保護フランジ部41と、第二保護フランジ部41の外径側端部から密封流体側Bに向かって延びる第二保護円筒部42と、第二保護円筒部42の密封流体側B端部から外径方向に延びる第二保護外周部43とを有している。  Thesecond protection ring 40 is provided on the atmosphere side A with a predetermined axial distance from the firstprotection flange portion 31 of thefirst protection ring 30, and extends in the radial direction. A second protectivecylindrical portion 42 extending from the outer diameter side end of theprotective flange portion 41 toward the sealed fluid side B, and a second protective outer periphery extending in the outer diameter direction from the sealed fluid side B end of the second protectivecylindrical portion 42Part 43.

第一保護環30の第一保護外周部32の密封対象側B端面が第二シール20の外向きフランジ部23の大気側A端面に当接し、その第一保護外周部32の大気側A端面に第二保護環40の第二保護外周部43の密封対象側B端面が当接し、第一保護外周部32と第二保護外周部43とが第二シール20の外向きフランジ部23のカシメ部23aにてカシメ固定され、これにより第一保護環30と第二保護環40とが軸方向に所定間隔を有して装着される。  The sealing target side B end surface of the first protective outerperipheral portion 32 of the firstprotective ring 30 abuts on the atmospheric side A end surface of theoutward flange portion 23 of thesecond seal 20, and the atmospheric side A end surface of the first protective outerperipheral portion 32. The sealing target side B end surface of the second protective outerperipheral portion 43 of the secondprotective ring 40 abuts, and the first protective outerperipheral portion 32 and the second protective outerperipheral portion 43 are caulked on theoutward flange portion 23 of thesecond seal 20. The firstprotective ring 30 and the secondprotective ring 40 are attached at a predetermined interval in the axial direction by being caulked and fixed by theportion 23a.

第三シール50は、スリーブ11のフランジ部13に接着しているゴム状弾性体の第三シール本体部55を備えている。  Thethird seal 50 includes a rubber-like elastic third sealmain body 55 bonded to theflange portion 13 of thesleeve 11.

第三シール本体部55は、第一シール本体部15と一体に成形されていて、第一保護環30の第一保護フランジ部31の密封流体側B端面に摺動する内径方向に傾き径方向所定間隔を有して設けられている第一シールリップ56及び第二シールリップ57とを有している。  The third sealmain body 55 is formed integrally with the first sealmain body 15, and is inclined in the radial direction in the inner diameter direction sliding on the sealing fluid side B end surface of the firstprotective flange portion 31 of the firstprotective ring 30. Afirst seal lip 56 and asecond seal lip 57 are provided at a predetermined interval.

ダストシール60は、第一シール本体部15の大気側A端部に第三シール本体部55と共に一体で成形されていて外径方向に傾いて延び、第一保護環30の第一保護円筒部33の内周面に摺動するダストシールリップ65を有している。  Thedust seal 60 is integrally formed with thethird seal body 55 at the atmosphere side A end of thefirst seal body 15 and extends in an inclined direction in the outer diameter direction, and thefirst protection cylinder 33 of thefirst protection ring 30. And adust seal lip 65 that slides on the inner peripheral surface of the.

第四シール70は、第一保護環30の第一保護フランジ部31と第二保護環40の第二保護フランジ部41とにより挟持されている第四シール本体部71を備えている。  Thefourth seal 70 includes afourth seal body 71 that is sandwiched between the firstprotective flange 31 of the firstprotective ring 30 and the secondprotective flange 41 of the secondprotective ring 40.

第四シール本体部71は、樹脂であるテフロン(登録商標)で成形されている断面が矩方形状であって、内周面74が軸2の外周面に面接触で摺動するようになっている。  Thefourth seal body 71 has a rectangular cross section formed of resin Teflon (registered trademark), and the innerperipheral surface 74 slides on the outer peripheral surface of theshaft 2 in surface contact. ing.

上記構成の軸付きシール1においては、第四シール本体部71が第一保護環30と第二保護環40とで挟持され、軸2の外周面に面接触で摺動し、大気側Aの泥水等のダストをシールするので、ダストシール60を通過し第三シール50でシールするダストの量が減少し、ダストをシールすることによる第三シール本体部55の摩耗を抑制することができる。したがって、第三シール本体部55の早期摩耗に起因する締め代が低下し、シール性が低下するのを防止することが可能となり、シール性の低下で大気側Aの泥水等のダストが密封流体側Bに侵入するのを防止することが可能となり、軸付きシール1の寿命を向上することが可能となる。  In the seal with shaft 1 having the above-described configuration, thefourth seal body 71 is sandwiched between thefirst protection ring 30 and thesecond protection ring 40 and slides on the outer peripheral surface of theshaft 2 in surface contact. Since dust such as muddy water is sealed, the amount of dust passing through thedust seal 60 and sealed by thethird seal 50 is reduced, and wear of the third sealmain body 55 due to sealing of dust can be suppressed. Therefore, it is possible to prevent the tightening allowance due to the early wear of the third sealmain body 55 from being reduced, and to prevent the sealing performance from being lowered. It becomes possible to prevent intrusion into the side B, and it is possible to improve the life of the shaft seal 1.

また、第四シール本体部71は、樹脂であるテフロン(登録商標)で成形されているので低摩擦性に優れ、摩耗が抑制されるのでシール性の低下がなく、しかも軸2に面接触で摺動するのでシール面積が大きく、寿命終期であっても泥水等のダストに対するシール性が良く、第三シール50でシールするダストの量を減少することが可能となる。  Further, thefourth seal body 71 is formed of Teflon (registered trademark), which is a resin, so that it is excellent in low friction and wear is suppressed, so that the sealing performance is not deteriorated and theshaft 2 is in surface contact. Since it slides, the sealing area is large, and the sealing performance against dust such as muddy water is good even at the end of the life, and the amount of dust sealed by thethird seal 50 can be reduced.

第二実施形態
図2は、本発明の第二実施例に係る軸付きシール1の要部断面を示している。第二実施例は、第四シール70において、第四シール本体部71と第二保護環40の第二保護円筒部42の内径側端面との間にリップ形状73からなるゴム状弾性体のリング72を介在させている点が第一実施例と異なる。
2nd Embodiment FIG. 2: has shown the principal part cross section of the seal | sticker 1 with a shaft which concerns on the 2nd Example of this invention. In the second embodiment, in thefourth seal 70, a rubber-like elastic ring having alip shape 73 between thefourth seal body 71 and the inner diameter side end face of the second protectivecylindrical portion 42 of the secondprotective ring 40 is used. The difference from the first embodiment is that 72 is interposed.

したがって、第二実施例においても第一実施例と同様の作用を奏する他に、これに加えるに、リップ形状73からなるゴム状弾性体のリング72が第四シール本体部71と第二保護環40の第二保護円筒部42との間に介在しているので、軸2が変動したときであっても、テフロン(登録商標)からなる第四シール本体部71の軸2に対する追随性、圧縮安定性を得ることが可能となる。  Therefore, in the second embodiment, in addition to the same effect as the first embodiment, in addition to this, aring 72 of a rubber-like elastic body made of alip shape 73 is provided with thefourth seal body 71 and the second protective ring. 40, and the second protectivecylindrical portion 42 is intervened. Therefore, even when theshaft 2 fluctuates, the followability and compression of the fourth sealmain body portion 71 made of Teflon (registered trademark) with respect to theshaft 2 are compressed. Stability can be obtained.

本発明の第一実施例に係る軸付きシールの一部断面図1 is a partial cross-sectional view of a shaft seal according to a first embodiment of the present invention.本発明の第二実施例に係る軸付きシールの一部断面図Partial sectional view of a shaft-mounted seal according to a second embodiment of the present invention従来例に係る軸付きシールの一部断面図Partial sectional view of a shaft-mounted seal according to a conventional example

符号の説明Explanation of symbols

1 軸付きシール
2 軸
3 ハウジング
10 第一シール
11 スリーブ
12,22,33,42 円筒部
13,23,24,31,41 フランジ部
15,25,55,71 シール本体部
20 第二シール
21 補強環
23a カシメ部
26,27,28,29,56,57,65 シールリップ
26a ガータスプリング
30 第一保護環
32,43 外周部
40 第二保護環
50 第三シール
60 ダストシール
70 第四シール
72 リング
73 リップ形状
A 大気側
B 密封流体側
1shaft seal 2shaft 3housing 10first seal 11sleeve 12, 22, 33, 42cylindrical portion 13, 23, 24, 31, 41flange portion 15, 25, 55, 71seal body portion 20second seal 21reinforcement Ring23a Caulking portion 26, 27, 28, 29, 56, 57, 65Seal lip26a Garter spring 30 Firstprotective ring 32, 43 Outerperipheral portion 40 Secondprotective ring 50Third seal 60Dust seal 70Fourth seal 72Ring 73 Lip shape A Atmosphere side B Sealed fluid side

Claims (2)

Translated fromJapanese
互に同心的に相対動する軸とハウジングとの間の環状空間に設けられ、密封流体側の密封流体をシールすると共に、大気側の泥水等のダストをシールするものであって、
前記軸に装着され、大気側で外径方向に延びるフランジ部を有するスリーブと、前記軸の外周面をシールする第一シール本体部と、を備えた第一シールと、
前記ハウジングに装着され、補強環と、前記第一シールに摺動する第二シール本体部と、を備えた第二シールと、
前記補強環に固定され、前記フランジ部と軸方向所定間隔を有し大気側に設けられた第一保護環及び第二保護環と、
前記フランジ部に接着し前記第一保護環に摺動する第三シール本体部を備えた第三シールと、
前記第一保護環と前記第二保護環とに挟持され前記軸に面接触で摺動する樹脂の第四シール本体部を備えた第四シールと、
を備えたことを特徴とする軸付きシール。
Provided in an annular space between the shaft and the housing that move concentrically relative to each other, seals the sealing fluid on the sealing fluid side, and seals dust such as muddy water on the atmosphere side,
A first seal provided with a sleeve having a flange portion attached to the shaft and extending in the outer diameter direction on the atmosphere side; and a first seal body portion for sealing the outer peripheral surface of the shaft;
A second seal that is mounted on the housing and includes a reinforcing ring and a second seal body that slides on the first seal;
A first protective ring and a second protective ring fixed to the reinforcing ring and provided on the atmosphere side with a predetermined interval in the axial direction from the flange portion;
A third seal provided with a third seal main body that adheres to the flange and slides on the first protective ring;
A fourth seal provided with a fourth seal body portion made of resin that is sandwiched between the first protective ring and the second protective ring and slides in surface contact with the shaft;
A seal with a shaft characterized by comprising:
請求項1に記載の軸付きシールであって、リップ形状からなるゴム状弾性体のリングを前記第四シール本体部と前記第二保護環の円筒部との間に介在させたことを特徴とする軸付きシール。  The shaft-attached seal according to claim 1, wherein a ring of a rubber-like elastic body having a lip shape is interposed between the fourth seal main body portion and the cylindrical portion of the second protective ring. Seal with shaft to be used.
JP2006069238A2006-03-142006-03-14Seal with shaftWithdrawnJP2007247708A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP2006069238AJP2007247708A (en)2006-03-142006-03-14Seal with shaft

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP2006069238AJP2007247708A (en)2006-03-142006-03-14Seal with shaft

Publications (1)

Publication NumberPublication Date
JP2007247708Atrue JP2007247708A (en)2007-09-27

Family

ID=38592232

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP2006069238AWithdrawnJP2007247708A (en)2006-03-142006-03-14Seal with shaft

Country Status (1)

CountryLink
JP (1)JP2007247708A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2011043212A (en)*2009-08-212011-03-03Nok CorpSealing device
EP2799743A4 (en)*2011-12-272015-08-05Nok CorpSealing device
CN113357371A (en)*2020-02-192021-09-07Nok株式会社Sealing device
EP4174345A1 (en)*2021-10-292023-05-03Freudenberg-NOK General PartnershipSeal cartridge with electrically conductive non-woven grounding
US12410866B2 (en)2021-10-292025-09-09Freudenberg-Nok General PartnershipSeal cartridge with electrically conductive non-woven grounding

Cited By (6)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2011043212A (en)*2009-08-212011-03-03Nok CorpSealing device
EP2799743A4 (en)*2011-12-272015-08-05Nok CorpSealing device
CN113357371A (en)*2020-02-192021-09-07Nok株式会社Sealing device
EP4174345A1 (en)*2021-10-292023-05-03Freudenberg-NOK General PartnershipSeal cartridge with electrically conductive non-woven grounding
US11754188B2 (en)2021-10-292023-09-12Freudenberg-Nok General PartnershipSeal cartridge with electrically conductive non-woven grounding
US12410866B2 (en)2021-10-292025-09-09Freudenberg-Nok General PartnershipSeal cartridge with electrically conductive non-woven grounding

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