JP2005337345A - Sealing device with pulsar ring - Google Patents

Sealing device with pulsar ring Download PDF

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Publication number
JP2005337345A
JP2005337345A JP2004155396A JP2004155396A JP2005337345A JP 2005337345 A JP2005337345 A JP 2005337345A JP 2004155396 A JP2004155396 A JP 2004155396A JP 2004155396 A JP2004155396 A JP 2004155396A JP 2005337345 A JP2005337345 A JP 2005337345A
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Japan
Prior art keywords
ring
lip
mounting ring
side mounting
pulsar
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JP2004155396A
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Japanese (ja)
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Hiroki Matsui
宏樹 松井
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Nok Corp
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Nok Corp
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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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • F16J15/326—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals with means for detecting or measuring relative rotation of the two elements

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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

<P>PROBLEM TO BE SOLVED: To provide a structure capable of effectively preventing lowering of rotation detection accuracy by a magnetic field of a pulsar ring 6 in a sealing device having seal lips 4 and 5, and the pulsar ring 6 of a magnetic rotary encoder on a rotation side attachment ring 2. <P>SOLUTION: The pulsar ring 6 is provided on the rotation side attachment ring 2 in such a manner of being separated from the rotation side seal lips 4 and 5, and thereby the rotation side attachment ring 2 can be pushed to the axial direction between the rotation side seal lips 4 and 5 and the pulsar ring 6 at the time of attachment to an inner peripheral member 112. Therefore, the rotation side attachment ring 2, the rotation side seal lips 4 and 5 and the pulsar ring 6 can be easily positioned along the axial direction with respect to a stationary side attachment ring 1, mixing of the material of the rotation side seal lips 4 and 5 into the pulsar ring 6 can be prevented at the time of simultaneous molding of the rotation side seal lips 4 and 5 and the pulsar ring 6, and influence on the magnetic field can be prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、互いに回転する二部材間を密封する密封装置であって、特に、磁気式ロータリエンコーダのパルサーリングを備えたものに関する。   The present invention relates to a sealing device that seals between two members that rotate with each other, and more particularly, to a device that includes a pulsar ring of a magnetic rotary encoder.

図４は、この種のパルサーリング付き密封装置の典型的な従来技術を、軸心Ｏを通る平面で切断して示す装着状態の半断面図である。この密封装置１００は、ハブシールとも呼ばれ、自動車における懸架装置に車輪を回転自在に支持する軸受１１０の外輪１１１と内輪１１２の間に組み込まれて、外部ＳＯから軸受１１０の内部ＳＩへ泥水や塵埃等が侵入するのを防止すると共に、軸受１１０の内部ＳＩに封入されたグリースが外部ＳＯへ流出するのを防止するものである。 FIG. 4 is a half sectional view of a mounting state in which a typical prior art of this kind of sealing device with a pulsar ring is cut along a plane passing through an axis O. FIG. The sealing device 100 is also called a hub seal, it is incorporated between the outer ring 111 and inner ring 112 of the bearing 110 that rotatably supports the wheel suspension system in a motor vehicle, muddy water from the outside S O into the interior S I of the bearing 110 with and dust are prevented from entering, grease sealed in the interior S I of the bearing 110 is to prevent the flowing out S O.

詳しくは、密封装置１００は、軸受１１０の外輪１１１の端部内周面に圧入嵌着された金属製の静止側取付環１０１と、軸受１１０の内輪１１２の端部外周面に圧入嵌着された金属製の回転側取付環１０２と、静止側取付環１０１の内向きフランジ１０１ｂの内周端に一体的に設けられて先端部が回転側取付環１０２の内周筒部１０２ａの外周面に摺動可能に密接されるゴム状弾性材料からなる静止側シールリップ１０３と、回転側取付環１０２における外向きフランジ１０２ｂの外周部に一体的に設けられて先端部が静止側取付環１０１における外周筒部１０１ａの内周面及び内向きフランジ１０１ｂの内側面にそれぞれ摺動可能に密接されるゴム状弾性材料からなる回転側の外周リップ１０４及びサイドリップ１０５とを備える（例えば特許文献１参照）。   Specifically, the sealing device 100 is press-fitted to a metal stationary side mounting ring 101 press-fitted to the inner peripheral surface of the end of the outer ring 111 of the bearing 110 and an outer peripheral surface of the end of the inner ring 112 of the bearing 110. It is integrally provided at the inner peripheral end of the inward flange 101b of the metal rotating side mounting ring 102 and the inward flange 101b of the stationary side mounting ring 101, and the tip part slides on the outer peripheral surface of the inner peripheral cylindrical part 102a of the rotating side mounting ring 102. A stationary seal lip 103 made of a rubber-like elastic material that is movably brought into close contact with an outer peripheral portion of the outward flange 102b of the rotating side mounting ring 102, and a distal end portion of the outer peripheral cylinder of the stationary side mounting ring 101. A rotation-side outer peripheral lip 104 and a side lip 105 made of a rubber-like elastic material that are slidably brought into close contact with the inner peripheral surface of the portion 101a and the inner surface of the inward flange 101b (for example, Patent reference 1).

すなわち、この密封装置１００は、軸受１１０の外部ＳＯと内部ＳＩとの間に、静止側シールリップ１０３、回転側の外周リップ１０４及びサイドリップ１０５による密封摺動部が三段に形成され、しかも、回転側の外周リップ１０４及びサイドリップ１０５には遠心力による振り切り作用を生じるので、優れた密封性能を発揮することができる。 That is, the sealing device 100 is provided between the external S O and internal S I of the bearing 110, seal sliding portion by the stationary seal lip 103, the outer periphery of the rotation side lips 104 and the side lip 105 is formed in a three-stage In addition, since the outer peripheral lip 104 and the side lip 105 on the rotation side have a swinging action due to centrifugal force, excellent sealing performance can be exhibited.

一方、車両における懸架装置に車輪を回転自在に支持する軸受１１０を密封する密封装置には、磁気センサによって回転速度を検出するために、磁性粉体を混入したゴム状弾性材料又は合成樹脂材料で円盤状に成形されると共に円周方向交互に異なる磁極Ｎ，Ｓが形成されたパルサーリング（パルス発生リング）を、一体的に設けることが知られている（例えば特許文献２参照）。
特開平１０−２５２７６２ 特開２００３−２８３０９ On the other hand, the sealing device for sealing the bearing 110 that rotatably supports the wheel on the suspension device in the vehicle is made of a rubber-like elastic material mixed with magnetic powder or a synthetic resin material in order to detect the rotation speed by a magnetic sensor. It is known to integrally provide a pulsar ring (pulse generation ring) formed in a disk shape and formed with magnetic poles N and S that are alternately different in the circumferential direction (see, for example, Patent Document 2).
JP 10-252762 A JP 2003-28309 A

ところが、図４のような、回転側取付環１０２に外周リップ１０４及びサイドリップ１０５を備える密封装置１００において、この図４に二点鎖線で示されるように、回転側取付環１０２における外向きフランジ１０２ｂの外側面にパルサーリング１０６を一体に設ける場合、その成形の過程で、外周リップ１０４及びサイドリップ１０５を成形する未加硫材料と、パルサーリング１０６を成形する磁性粉体入り未加硫材料が部分的に混合して、パルサーリング１０６の磁界による回転検出精度に悪影響を及ぼすおそれがあった。   However, in the sealing device 100 provided with the outer peripheral lip 104 and the side lip 105 on the rotation side mounting ring 102 as shown in FIG. 4, as shown by a two-dot chain line in FIG. When the pulsar ring 106 is integrally provided on the outer surface of the 102b, an unvulcanized material for molding the outer peripheral lip 104 and the side lip 105 and an unvulcanized material containing magnetic powder for molding the pulsar ring 106 in the molding process. May partially mix and may adversely affect the rotation detection accuracy by the magnetic field of the pulsar ring 106.

また、回転側取付環１０２を軸受１１０の内輪１１２の端部外周面に圧入嵌着する際に、ゴム状弾性材料等からなるパルサーリング１０６を押圧するので、パルサーリング１０６の変形によって、回転側取付環１０２の位置決めが困難になり、あるいはパルサーリング１０６に変形や損傷を生じて、これらも、パルサーリング１０６の磁界による回転検出精度に悪影響を及ぼすおそれがあった。   Further, when the rotation-side mounting ring 102 is press-fitted into the outer peripheral surface of the end portion of the inner ring 112 of the bearing 110, the pulsar ring 106 made of a rubber-like elastic material or the like is pressed. The positioning of the mounting ring 102 becomes difficult, or the pulsar ring 106 is deformed or damaged, which may adversely affect the rotation detection accuracy of the pulsar ring 106 due to the magnetic field.

本発明は、以上のような点に鑑みてなされたものであって、その技術的課題は、シールリップと磁気式ロータリエンコーダのパルサーリングを回転側取付環に設けた密封装置において、パルサーリングの磁界による回転検出精度の低下を有効に防止し得る構造とすることにある。   The present invention has been made in view of the above points. The technical problem of the present invention is that a sealing device in which a lip ring of a seal lip and a magnetic rotary encoder is provided on a rotation side mounting ring, An object of the present invention is to provide a structure that can effectively prevent a decrease in rotation detection accuracy due to a magnetic field.

上述した技術的課題を有効に解決するための手段として、請求項１の発明に係るパルサーリング付き密封装置は、非回転の外周部材に密嵌固定される静止側取付環と、前記外周部材の内周側に回転可能に配置された内周部材に密嵌固定される回転側取付環と、前記静止側取付環に一体的に設けられて先端部が前記回転側取付環に摺動可能に密接されるゴム状弾性材料からなる静止側シールリップと、前記回転側取付環に一体的に設けられて先端部が前記静止側取付環に摺動可能に密接されるゴム状弾性材料からなる回転側シールリップと、前記回転側取付環に一体的に設けられたパルサーリングとを備え、このパルサーリングは磁性粉体を混入したゴム状弾性材料又は合成樹脂材料からなり、前記回転側シールリップと分離して形成されたものである。   As means for effectively solving the technical problem described above, a sealing device with a pulsar ring according to the invention of claim 1 includes a stationary-side mounting ring that is tightly fitted and fixed to a non-rotating outer peripheral member, and the outer peripheral member. A rotation-side mounting ring that is tightly fitted and fixed to an inner circumferential member that is rotatably arranged on the inner peripheral side, and a tip portion that is integrally provided on the stationary-side mounting ring so that the tip can slide on the rotation-side mounting ring A stationary seal lip made of a rubber-like elastic material to be in close contact and a rotation made of a rubber-like elastic material integrally provided on the rotation-side attachment ring and having a tip slidably in contact with the stationary-side attachment ring. A side seal lip and a pulsar ring integrally provided on the rotating side mounting ring, and the pulsar ring is made of a rubber-like elastic material mixed with magnetic powder or a synthetic resin material. Also formed separately It is.

上記構成において、パルサーリングは回転側取付環に回転側シールリップと分離して設けられるため、内周部材への装着の際に、回転側シールリップとパルサーリングの間で回転側取付環を軸方向へ押圧することができ、したがって静止側取付環に対する回転側取付環（回転側シールリップ及びパルサーリング）の軸方向の位置決めをしやすく、また、回転側シールリップとパルサーリングの同時成形に際して、パルサーリングに回転側シールリップの材料が混合するのを防止することができる。   In the above configuration, since the pulsar ring is provided separately from the rotation side seal lip on the rotation side mounting ring, the rotation side mounting ring is pivoted between the rotation side seal lip and the pulsar ring when mounted on the inner peripheral member. Therefore, it is easy to position the rotating side mounting ring (rotating side seal lip and pulsar ring) in the axial direction with respect to the stationary side mounting ring. It is possible to prevent the material of the rotary side seal lip from mixing with the pulsar ring.

請求項１の発明に係るパルサーリング付き密封装置によれば、装着の際に回転側取付環の位置決めが容易であり、このためパルサーリングが高精度に位置決めされ、しかも、このパルサーリングに回転側シールリップの材料が混合することによる磁界のばらつきが防止されるので、回転検出精度を向上することができる。   According to the sealing device with a pulsar ring according to the first aspect of the present invention, it is easy to position the rotating side mounting ring at the time of mounting. Therefore, the pulsar ring is positioned with high accuracy, and the pulsar ring is positioned on the rotating side. Since the variation of the magnetic field due to the mixing of the material of the seal lip is prevented, the rotation detection accuracy can be improved.

図１及び図２は、本発明に係るパルサーリング付き密封装置の好ましい実施の形態を、軸心Ｏを通る平面で切断して示す半断面図である。なお、図１と図２は、静止側シールリップの形状が異なるほかは、基本的に同様のものである。   1 and 2 are half sectional views showing a preferred embodiment of a sealing device with a pulsar ring according to the present invention by cutting along a plane passing through an axis O. FIG. 1 and 2 are basically the same except that the shape of the stationary-side seal lip is different.

図１及び図２において、参照符号１１０は、自動車の懸架装置において、車輪を回転自在に支持するための軸受であって、外輪１１１及び内輪１１２と、その間に配置され円周方向に並んだ多数の鋼球１１３（図１には１個のみ示される）からなる。外輪１１１は非回転であって、請求項１に記載された外周部材に相当し、懸架装置における不図示のナックルに固定されている。また、内輪１１２は車輪側の不図示のハブに一体的に嵌着されており、請求項１に記載された内周部材に相当するものである。   1 and 2, reference numeral 110 denotes a bearing for rotatably supporting a wheel in a suspension system of an automobile. The outer ring 111 and the inner ring 112 are arranged in a circumferential direction between the outer ring 111 and the inner ring 112. Steel balls 113 (only one is shown in FIG. 1). The outer ring 111 is non-rotating, corresponds to the outer peripheral member described in claim 1, and is fixed to a knuckle (not shown) in the suspension device. The inner ring 112 is integrally fitted to a hub (not shown) on the wheel side, and corresponds to the inner peripheral member described in claim 1.

本発明に係る密封装置は、軸受１１０の内部ＳＩへ、外部ＳＯからの泥水や塵埃等が侵入するのを防止すると共に、鋼球１１３を潤滑するグリースが軸受外部ＳＯへ流出するのを防止するもので、軸受１１０の外輪１１１の端部内周面に密嵌固定される静止側取付環１と、軸受１１０の内輪１１２の端部外周面に密嵌固定される回転側取付環２と、静止側取付環１に一体的に設けられて先端部が回転側取付環２に摺動可能に密接されるゴム状弾性材料からなる内周リップ３と、回転側取付環２に一体的に設けられて先端部が静止側取付環１に摺動可能に密接されるゴム状弾性材料からなる外周リップ４及びサイドリップ５と、回転側取付環２に一体的に設けられたパルサーリング６とを備える。なお、内周リップ３は、請求項１に記載された静止側シールリップに相当するものであり、外周リップ４及びサイドリップ５は、請求項１に記載された回転側シールリップに相当するものである。 Sealing device according to the present invention, the interior S I of the bearing 110, thereby preventing the muddy water and dust from the outside S O from entering, the grease for lubricating the steel balls 113 from flowing out to the outside of the bearing S O The stationary side mounting ring 1 that is tightly fitted and fixed to the inner peripheral surface of the end portion of the outer ring 111 of the bearing 110, and the rotary side mounting ring 2 that is fixedly fitted and fixed to the outer peripheral surface of the end portion of the inner ring 112 of the bearing 110. And an inner peripheral lip 3 made of a rubber-like elastic material provided integrally with the stationary side mounting ring 1 and having a tip slidably in contact with the rotating side mounting ring 2, and integrally with the rotating side mounting ring 2. The outer peripheral lip 4 and the side lip 5 made of a rubber-like elastic material, the tip of which is slidably brought into close contact with the stationary side mounting ring 1, and the pulsar ring 6 integrally provided on the rotation side mounting ring 2 With. The inner peripheral lip 3 corresponds to the stationary side seal lip described in claim 1, and the outer peripheral lip 4 and the side lip 5 correspond to the rotation side seal lip described in claim 1. It is.

詳しくは、静止側取付環１は、鋼板等の金属板を打ち抜きプレス成形することにより製作したものであって、軸心Ｏを通る平面で切断した形状（図１又は図２の断面形状）が略Ｌ字形をなし、すなわち軸受１１０の外輪１１１の内周面に圧入嵌着される外周筒部１１と、その軸受内部ＳＩ側の端部から内周側へ延びる内向きフランジ１２からなる。 Specifically, the stationary-side mounting ring 1 is manufactured by stamping and pressing a metal plate such as a steel plate, and has a shape (cross-sectional shape in FIG. 1 or FIG. 2) cut along a plane passing through the axis O. a substantially L-shape, i.e. the outer peripheral tube portion 11 which is pressure inserted and fitted to the inner peripheral surface of the outer ring 111 of the bearing 110, made of an inward flange 12 extending to the inner circumferential side from an end portion of the bearing inner S I side.

回転側取付環２も同様に、鋼板等の金属板を打ち抜きプレス成形することにより製作したものであって、軸心Ｏを通る平面で切断した形状（図１又は図２の断面形状）が略Ｌ字形をなす。すなわち軸受１１０の内輪１１２の外周面に圧入嵌着される内周筒部２１と、その軸受外部ＳＯ側の端部から外周側へ延びる外向きフランジ２２とからなる。静止側取付環１における内向きフランジ１２の内径は、回転側取付環２における内周筒部２１の外周面よりも大径であり、回転側取付環２における外向きフランジ２２の外径は、静止側取付環１における外周筒部１１の内周面よりも小径に形成されている。 Similarly, the rotation-side mounting ring 2 is manufactured by punching and pressing a metal plate such as a steel plate, and the shape (cross-sectional shape in FIG. 1 or FIG. 2) cut along a plane passing through the axis O is approximately. It is L-shaped. That the inner peripheral tube portion 21 which is pressure inserted and fitted to the outer peripheral surface of the inner ring 112 of the bearing 110, made of an outward flange 22 for extending to the outer peripheral side from an end portion of the bearing external S O side. The inner diameter of the inward flange 12 in the stationary side mounting ring 1 is larger than the outer peripheral surface of the inner peripheral cylindrical portion 21 in the rotation side mounting ring 2, and the outer diameter of the outward flange 22 in the rotation side mounting ring 2 is The stationary side mounting ring 1 is formed with a smaller diameter than the inner peripheral surface of the outer peripheral cylindrical portion 11.

静止側シールリップである内周リップ３は、静止側取付環１における内向きフランジ１２の内周部を埋設した状態に加硫接着された基部３１と、その内周部から延びて、回転側取付環２における内周筒部２１の外周面に適当な締め代をもって摺動可能に密接されるリップ本体３２からなる。なお、図１の形態においては、リップ本体３２が軸受内部ＳＩと反対側を向いており、図２の形態においては、リップ本体３２が軸受内部ＳＩ側を向いている。 The inner peripheral lip 3 which is a stationary side seal lip extends from the inner peripheral portion of the inner peripheral portion of the inward flange 12 in the stationary side mounting ring 1 and is vulcanized and bonded to the rotation side. The lip body 32 is slidably brought into close contact with the outer peripheral surface of the inner peripheral cylindrical portion 21 in the mounting ring 2 with an appropriate fastening margin. It should be noted that in the FIG. 1 is oriented opposite lip body 32 and the bearing inner S I, in the form of FIG. 2, the lip body 32 is facing the bearing inner S I side.

回転側シールリップである外周リップ４及びサイドリップ５は、回転側取付環２における外向きフランジ２２の外周部を埋設した状態に加硫接着された基部７を共有し、すなわちこの共有基部７から二股に延びるように形成されている。   The outer peripheral lip 4 and the side lip 5 which are rotation side seal lips share the base portion 7 which is vulcanized and bonded in a state where the outer peripheral portion of the outward flange 22 in the rotation side mounting ring 2 is embedded, that is, from the common base portion 7. It is formed to extend into two branches.

そして、外周リップ４は、共有基部７における軸受外部ＳＯと反対側の端部から、図中に破線で示されるように、軸受外部ＳＯと反対側へ凸の屈曲形状をもって外周側へ延び、軸受外部ＳＯを向いた先端部が、静止側取付環１における外周筒部１１の内周面に、適当な締め代をもって摺動可能に密接される。また、サイドリップ５は、外周リップ４の内周側に位置して、共有基部７から、図中に破線で示されるように、軸受外部ＳＯと反対側へ向けて、先端ほど大径になる円錐筒状に延び、先端部が、静止側取付環１における内向きフランジ１２の内側面に、適当な締め代をもって摺動可能に密接される。 The circumferential lip 4 extends from an end portion opposite to the bearing outside S O in a shared base 7, as indicated by the broken line in the figure, with a convex bent shape to the outer peripheral side to the outside of the bearing S O opposite , tip facing bearing external S O is, the inner peripheral surface of the outer tube portion 11 at the stationary side installation ring 1, slidably closely contacting with a suitable fastening margin. The side lip 5 is positioned on the inner peripheral side of the outer peripheral lip 4, from the shared base 7, as indicated by the broken line in the drawing, toward the outside of the bearing S O opposite, larger diameter as the tip It extends in the shape of a conical cylinder, and the front end portion is slidably in close contact with the inner surface of the inward flange 12 in the stationary side mounting ring 1 with an appropriate fastening margin.

パルサーリング６は、磁性粉体を混入したゴム状弾性材料で平たい円盤状に成形されると共に、回転側取付環２における外向きフランジ２２の外側面に一体的に加硫接着されたものであって、Ｎ極とＳ極が円周方向に等ピッチで交互に着磁されている。また、このパルサーリング６の成形領域は、外周リップ４及びサイドリップ５の共有基部７の成形領域から分離しており、パルサーリング６と前記共有基部７との間で、前記外向きフランジ２２の外側面が環状に露出している（露出面２２ｂ’）。   The pulsar ring 6 is formed into a flat disk shape with a rubber-like elastic material mixed with magnetic powder and is integrally vulcanized and bonded to the outer surface of the outward flange 22 in the rotating side mounting ring 2. N poles and S poles are alternately magnetized at equal pitches in the circumferential direction. Further, the molding region of the pulsar ring 6 is separated from the molding region of the shared base portion 7 of the outer peripheral lip 4 and the side lip 5, and the outward flange 22 is between the pulsar ring 6 and the shared base portion 7. The outer surface is exposed in an annular shape (exposed surface 22b ′).

密封装置の外側（軸受外部ＳＯ）には、パルサーリング６と近接対向させて、磁気センサ８が非回転状態に配置されている。磁気センサ８は、パルサーリング６と共に磁気式ロータリエンコーダを構成するものであり、すなわち、車輪の回転によって、内輪１１２に嵌着された回転側取付環２と共にパルサーリング６が回転すると、磁気センサ８から、その対向位置をパルサーリング６のＮ極とＳ極が交互に通過することによって、これに対応したパルス信号が出力されるようになっている。 A magnetic sensor 8 is arranged in a non-rotating state on the outside of the sealing device (outside the bearing S O ) so as to face the pulsar ring 6 in close proximity. The magnetic sensor 8 constitutes a magnetic rotary encoder together with the pulsar ring 6, that is, when the pulsar ring 6 rotates together with the rotating side mounting ring 2 fitted to the inner ring 112 due to the rotation of the wheel, the magnetic sensor 8. Therefore, when the N pole and S pole of the pulsar ring 6 alternately pass through the opposite position, a corresponding pulse signal is output.

以上の構成において、内周リップ３は、所定のゴム加硫成形用金型（不図示）内に、予め内向きフランジ１２の内周部に加硫接着剤を塗布した静止側取付環１を位置決めセットして型締めし、前記金型と内向きフランジ１２との間に画成された環状の成形用キャビティ内に、未加硫ゴム材料を充填し、加熱・加圧することによって、加硫成形と共に前記内向きフランジ１２への加硫接着を行ったものである。   In the above configuration, the inner peripheral lip 3 has the stationary side mounting ring 1 in which a vulcanizing adhesive is applied in advance to the inner peripheral portion of the inward flange 12 in a predetermined rubber vulcanization molding die (not shown). Positioned and clamped, filled with an unvulcanized rubber material in an annular molding cavity defined between the mold and the inward flange 12, heated and pressurized to vulcanize This is obtained by performing vulcanization adhesion to the inward flange 12 together with molding.

図３は、回転側取付環２に外周リップ４及びサイドリップ５とパルサーリング６を一体成形する過程示す説明図である。すなわち、図３における参照符号１２０は、複数の分割型１２１，１２２からなる金型で、その分割面間に回転側取付環２を位置決め固定することができ、型締め状態において、回転側取付環２における外向きフランジ２２の内側面２２ａの外周部と分割型１２１との間に、図１又は図２における外周リップ４、サイドリップ５及びその共有基部７と対応する断面形状の環状の成形用キャビティＣ１が画成され、前記外向きフランジ２２の外側面２２ｂと分割型１２２との間に、図１又は図２におけるパルサーリング６と対応する断面形状の環状の成形用キャビティＣ２が画成される。 FIG. 3 is an explanatory view showing a process of integrally forming the outer peripheral lip 4, the side lip 5, and the pulsar ring 6 on the rotation side mounting ring 2. That is, reference numeral 120 in FIG. 3 is a mold composed of a plurality of split molds 121 and 122, and the rotary side mounting ring 2 can be positioned and fixed between the split surfaces. 2 between the outer peripheral portion of the inner side surface 22a of the outward flange 22 in FIG. 2 and the split mold 121, for forming an annular shape having a cross-sectional shape corresponding to the outer peripheral lip 4, the side lip 5 and the shared base portion 7 in FIG. A cavity C 1 is defined, and an annular molding cavity C 2 having a cross-sectional shape corresponding to the pulsar ring 6 in FIG. 1 or 2 is defined between the outer surface 22 b of the outward flange 22 and the split mold 122. Made.

キャビティＣ１の内径、言い換えれば外周リップ４及びサイドリップ５の共有基部７の内径と、キャビティＣ２の外径、言い換えればパルサーリング６の外径は、ほぼ同じ径方向位置にある。また、キャビティＣ１，Ｃ２の間は、前記外向きフランジ２２の外側面２２ｂの外周部と分割型１２２との密接部Ａによってシールされ、互いに分離されている。 The inner diameter of the cavity C 1, the inner diameter of the shared base 7 of the circumferential lip 4 and the side lip 5 In other words, the outer diameter of the cavity C 2, the outer diameter of the pulsar ring 6 In other words, at about the same radial position. Further, the cavities C 1 and C 2 are sealed by a close contact portion A between the outer peripheral surface 22 b of the outward flange 22 and the split mold 122 and separated from each other.

したがって、金型１２０内に、予め外向きフランジ２２に加硫接着剤を塗布した回転側取付環２を、図３に示されるように位置決めセットして型締めし、一方のキャビティＣ１に未加硫ゴム材料を充填すると共に、他方のキャビティＣ２に、磁性粉体を均一に混合した未加硫ゴム材料を充填し、加熱・加圧することによって、外周リップ４及びサイドリップ５と、パルサーリング６を同時に、前記外向きフランジ２２に、加硫成形と共に加硫接着を行うことができる。なお、成形後、パルサーリング６には、不図示の多極着磁ヨーク等を用いて、Ｎ極とＳ極が円周方向交互に着磁される。 Therefore, the rotating side mounting ring 2 in which the vulcanized adhesive is applied to the outward flange 22 in advance in the mold 120 is positioned and set as shown in FIG. 3, and the mold is closed in one cavity C 1 . to fill the vulcanized rubber material, the other cavity C 2, the unvulcanized rubber material uniformly mixing magnetic powder filled, by heating and pressing, the outer peripheral lip 4 and the side lip 5, the pulser At the same time, the ring 6 can be vulcanized and bonded to the outward flange 22 together with vulcanization molding. In addition, after shaping | molding, the N pole and the S pole are alternately magnetized in the circumferential direction on the pulsar ring 6 using a multi-pole magnetizing yoke (not shown).

上記成形過程において、外周リップ４及びサイドリップ５を成形するキャビティＣ１と、パルサーリング６を成形するキャビティＣ２の間は、回転側取付環２における外向きフランジ２２の外側面２２ｂの外周部と分割型１２２との密接部Ａによってシールされ、互いに分離されているので、キャビティＣ１に充填され加圧された未加硫ゴム材料と、キャビティＣ２に充填され加圧された磁性粉体入り未加硫ゴム材料が、互いに混ざり合うことはない。このため、パルサーリング６の着磁後の磁界のばらつきが防止される。 In the molding process, between the cavity C 1 for molding the outer peripheral lip 4 and the side lip 5 and the cavity C 2 for molding the pulsar ring 6, the outer peripheral portion of the outer surface 22 b of the outward flange 22 in the rotation side mounting ring 2. and it is sealed by closely portion a between the divided mold 122, because they are separated from each other, and the unvulcanized rubber material filled in the cavity C 1 pressurized, magnetic powder which is filled into the cavity C 2 pressurized Entered unvulcanized rubber materials do not mix with each other. For this reason, the variation in the magnetic field after the pulsar ring 6 is magnetized is prevented.

また、キャビティＣ１内の未加硫ゴム材料の圧力により回転側取付環２の外向きフランジ２２に作用する荷重は分割型１２２で支承され、キャビティＣ２内の未加硫ゴム材料の圧力により外向きフランジ２２に作用する荷重は分割型１２１で支承される。このため、前記外向きフランジ２２に、成形圧力による変形が発生せず、精度良い成形を行うことができる。 Further, the load acting on the outward flange 22 of the rotating side mounting ring 2 due to the pressure of the unvulcanized rubber material in the cavity C 1 is supported by the split mold 122, and the pressure of the unvulcanized rubber material in the cavity C 2 A load acting on the outward flange 22 is supported by the split mold 121. For this reason, the outward flange 22 is not deformed by the molding pressure and can be molded with high accuracy.

図１又は図２の装着状態において、非回転である内周リップ３は、軸受１１０の内輪１１２と一体に回転する回転側取付環２の内周筒部２１の外周面に密封的に摺接される。一方、回転側取付環２と共に回転する外周リップ４及びサイドリップ５は、非回転である静止側取付環１の外周筒部１１の内周面及び内向きフランジ１２の内側面に密封的に摺接される。このため、軸受１１０の外部ＳＯと内部ＳＩとの間に、三段の密封摺動部が形成されるので、優れた密封性を奏する。 In the mounted state of FIG. 1 or FIG. 2, the non-rotating inner peripheral lip 3 is in sliding contact with the outer peripheral surface of the inner peripheral cylindrical portion 21 of the rotating side mounting ring 2 that rotates integrally with the inner ring 112 of the bearing 110. Is done. On the other hand, the outer peripheral lip 4 and the side lip 5 that rotate together with the rotating side mounting ring 2 slide in a sealing manner on the inner peripheral surface of the outer peripheral cylindrical portion 11 and the inner surface of the inward flange 12 of the stationary side mounting ring 1 that is not rotating. Touched. Therefore, between the external S O and internal S I of the bearing 110, since the seal sliding portion of the three stages is formed, it exhibits an excellent sealability.

特に、最も軸受外部ＳＯ側の密封摺動部を形成する外周リップ４には、回転時に、外周リップ４を外周側へ開くように遠心力が作用するので、外輪１１１と内輪１１２に微小な偏心がある場合のような、半回転毎の外周リップ４の追随変形動作が補償される。また、この外周リップ４には、軸受外部ＳＯ側から侵入しようとする泥酔や塵埃に対して、遠心力による振り切り作用も奏するため、優れた密封性を発揮する。 In particular, centrifugal force acts on the outer peripheral lip 4 that forms the sealing sliding portion closest to the bearing outer SO side during rotation to open the outer peripheral lip 4 to the outer peripheral side. The following deformation operation of the outer peripheral lip 4 every half rotation, such as when there is an eccentricity, is compensated. Further, the outer peripheral lip 4 also exerts a swinging action by centrifugal force against drunkenness and dust that is about to enter from the bearing external SO side, and thus exhibits excellent sealing performance.

また、サイドリップ５に作用する遠心力は、回転速度が速くなるほど、静止側取付環１の内向きフランジ１２の内側面に対するサイドリップ５の面圧を減少させるように作用するが、同時に、遠心力によるサイドリップ５の振り切り効果も高まるので、面圧低下による密封性の低下が補償される。   Further, the centrifugal force acting on the side lip 5 acts to reduce the surface pressure of the side lip 5 against the inner surface of the inward flange 12 of the stationary side mounting ring 1 as the rotational speed increases. Since the effect of swinging off the side lip 5 due to force is also increased, a decrease in sealing performance due to a decrease in surface pressure is compensated.

また、最も軸受内部ＳＩ側の内周リップ３は、対グリース用のシールであって、その先端内周と、回転側取付環２の内周筒部２１との摺動部は、軸受内部ＳＩに充填されたグリースによって潤滑される。 Also, most bearing internal S I side inner peripheral lip 3 is a seal for pairs grease, and the tip inner peripheral sliding portion between the inner peripheral tubular portion 21 of the rotation side installation ring 2 is the bearing It is lubricated by grease filled in S I.

当該密封装置は、予め、内周リップ３が回転側取付環２の内周筒部２１の外周面に密接すると共に、外周リップ４及びサイドリップ５が、静止側取付環１の外周筒部１１の内周面に密接した状態に、仮組しておくことができる。そして、図１あるいは図２のように軸受１１０に装着するには、不図示の治具を用いて、静止側取付環１及び回転側取付環２を、軸受１１０の外輪１１１と内輪１１２の間へ向けて押し込む。   In the sealing device, the inner peripheral lip 3 is in close contact with the outer peripheral surface of the inner peripheral cylindrical portion 21 of the rotating side mounting ring 2, and the outer peripheral lip 4 and the side lip 5 are connected to the outer peripheral cylindrical portion 11 of the stationary side mounting ring 1. Temporary assembly can be performed in a state of being in close contact with the inner peripheral surface. In order to mount the bearing 110 as shown in FIG. 1 or 2, the stationary side mounting ring 1 and the rotation side mounting ring 2 are placed between the outer ring 111 and the inner ring 112 of the bearing 110 using a jig (not shown). Push toward.

このとき、治具を、静止側取付環１における外周筒部１１の外端部１１ａと、回転側取付環２における外向きフランジ２２の露出面２２ｂ’に当てることができるので、治具をパルサーリング６に当てて押圧する場合に比較して、外輪１１１及び内輪１１２に対する静止側取付環１及び回転側取付環２の位置決め、ひいては静止側取付環１と回転側取付環２との相対的な位置決めを高精度に行うことができると共に、パルサーリング６の変形や損傷も防止できる。したがって、密封機能の安定性や、パルサーリング６と磁気センサ８で構成される磁気式ロータリエンコーダによる回転検出精度の安定性を向上させることができる。   At this time, since the jig can be applied to the outer end portion 11a of the outer peripheral cylindrical portion 11 in the stationary side mounting ring 1 and the exposed surface 22b 'of the outward flange 22 in the rotating side mounting ring 2, the jig can be applied to the pulser. Compared with the case where the ring 6 is pressed against the ring 6, the positioning of the stationary side mounting ring 1 and the rotating side mounting ring 2 with respect to the outer ring 111 and the inner ring 112, and consequently the relative relationship between the stationary side mounting ring 1 and the rotating side mounting ring 2. Positioning can be performed with high accuracy, and deformation and damage of the pulsar ring 6 can be prevented. Therefore, the stability of the sealing function and the stability of the rotation detection accuracy by the magnetic rotary encoder composed of the pulsar ring 6 and the magnetic sensor 8 can be improved.

また、先に述べたように、回転側取付環２の外向きフランジ２２に、外周リップ４及びサイドリップ５とパルサーリング６を同時成形した際に、双方のゴム材料が混合しないので、パルサーリング６への多極着磁後の磁界のばらつきが防止される。したがってこのことも、回転検出精度の安定性向上に寄与する。   Further, as described above, when the outer peripheral lip 4, the side lip 5 and the pulsar ring 6 are simultaneously formed on the outward flange 22 of the rotating side mounting ring 2, both the rubber materials do not mix. 6 is prevented from being dispersed. Therefore, this also contributes to improving the stability of the rotation detection accuracy.

本発明に係るパルサーリング付き密封装置の好ましい実施の形態を、軸心Ｏを通る平面で切断して示す半断面図である。1 is a half sectional view showing a preferred embodiment of a sealing device with a pulsar ring according to the present invention by cutting along a plane passing through an axis O. FIG. 本発明に係るパルサーリング付き密封装置の好ましい他の形態を、軸心Ｏを通る平面で切断して示す半断面図である。FIG. 5 is a half cross-sectional view showing another preferred embodiment of the sealing device with a pulsar ring according to the present invention cut along a plane passing through an axis O. 図１又は図２における回転側取付環に外周リップ及びサイドリップとパルサーリングを一体成形する過程を示す説明図である。It is explanatory drawing which shows the process in which an outer periphery lip, a side lip, and a pulsar ring are integrally formed in the rotation side attachment ring in FIG. パルサーリング付き密封装置の典型的な従来技術を、軸心Ｏを通る平面で切断して示す装着状態の半断面図である。1 is a half cross-sectional view of a mounting state in which a typical prior art of a sealing device with a pulsar ring is cut along a plane passing through an axis O. FIG.

符号の説明Explanation of symbols

１ 静止側取付環
１１ 外周筒部
１２ 内向きフランジ
２ 回転側取付環
２１ 内周筒部
２２ 外向きフランジ
２２ａ 内側面
２２ｂ 外側面
２２ｂ’ 露出面
３ 内周リップ（静止側シールリップ）
３１ 基部
３２ リップ本体
４ 外周リップ（回転側シールリップ）
５ サイドリップ（回転側シールリップ）
６ パルサーリング
７ 共有基部
８ 磁気センサ
１１０ 軸受
１１１ 外輪（外周部材）
１１２ 内輪（内周部材）
１１３ 鋼球
１２０ 金型
１２１，１２２ 分割型
Ｃ１，Ｃ２ キャビティ DESCRIPTION OF SYMBOLS 1 Static side attachment ring 11 Outer peripheral cylinder part 12 Inward flange 2 Rotation side attachment ring 21 Inner peripheral cylinder part 22 Outward flange 22a Inner side surface 22b Outer side surface 22b 'Exposed surface 3 Inner peripheral lip (static seal lip)
31 Base 32 Lip body 4 Outer peripheral lip (rotary seal lip)
5 Side lip (Rotary seal lip)
6 Pulsar ring 7 Shared base 8 Magnetic sensor 110 Bearing 111 Outer ring (outer peripheral member)
112 Inner ring (inner circumference member)
113 Steel ball 120 Die 121, 122 Split type C 1 , C 2 cavity

Claims (1)

非回転の外周部材（１１１）に密嵌固定される静止側取付環（１）と、前記外周部材（１１１）の内周側に回転可能に配置された内周部材（１１２）に密嵌固定される回転側取付環（２）と、前記静止側取付環（１）に一体的に設けられて先端部が前記回転側取付環（２）に摺動可能に密接されるゴム状弾性材料からなる静止側シールリップ（３）と、前記回転側取付環（２）に一体的に設けられて先端部が前記静止側取付環（１）に摺動可能に密接されるゴム状弾性材料からなる回転側シールリップ（４，５）と、前記回転側取付環（２）に一体的に設けられたパルサーリング（６）とを備え、このパルサーリング（６）が磁性粉体を混入したゴム状弾性材料又は合成樹脂材料からなり、前記回転側シールリップ（４，５）と分離して形成されたことを特徴とするパルサーリング付き密封装置。   The stationary side mounting ring (1) tightly fitted and fixed to the non-rotating outer peripheral member (111) and the inner peripheral member (112) rotatably arranged on the inner peripheral side of the outer peripheral member (111) And a rubber-like elastic material provided integrally with the stationary side mounting ring (1) and having a tip slidably in contact with the rotational side mounting ring (2). And a stationary elastic lip (3) and a rubber-like elastic material provided integrally with the rotating side mounting ring (2) and having a tip end slidably in contact with the stationary side mounting ring (1). A rotation-side seal lip (4, 5) and a pulsar ring (6) provided integrally with the rotation-side mounting ring (2) are provided. The pulsar ring (6) is a rubber-like material mixed with magnetic powder. Made of elastic material or synthetic resin material, separated from the rotating side seal lip (4, 5) Pulsar ring with sealing device characterized in that it.
JP2004155396A 2004-05-26 2004-05-26 Sealing device with pulsar ring Pending JP2005337345A (en)

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Publications (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007292092A (en) * 2006-04-21 2007-11-08 Nsk Ltd Seal ring with encoder and rolling bearing unit with encoder
EP2003352A1 (en) * 2006-03-31 2008-12-17 NOK Corporation Sealing device
DE112009001563T5 (en) 2008-06-25 2011-05-05 Uchiyama Manufacturing Corp. bearing seal
CN104482218A (en) * 2014-12-11 2015-04-01 重庆大学 Self-healing sealing device based on mangneto deformation rubber
CN106321845A (en) * 2016-11-09 2017-01-11 烟台润蚨祥油封有限公司 Automotive rotating oil seal having leakage storing and pumping-back functions

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09133698A (en) * 1995-11-13 1997-05-20 Nippon Seiko Kk Roller bearing unit with tone wheel
JP2004061271A (en) * 2002-07-29 2004-02-26 Koyo Seiko Co Ltd Rotation detecting ring and ball bearing apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09133698A (en) * 1995-11-13 1997-05-20 Nippon Seiko Kk Roller bearing unit with tone wheel
JP2004061271A (en) * 2002-07-29 2004-02-26 Koyo Seiko Co Ltd Rotation detecting ring and ball bearing apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2003352A1 (en) * 2006-03-31 2008-12-17 NOK Corporation Sealing device
EP2003352A4 (en) * 2006-03-31 2014-03-12 Nok Corp Sealing device
JP2007292092A (en) * 2006-04-21 2007-11-08 Nsk Ltd Seal ring with encoder and rolling bearing unit with encoder
DE112009001563T5 (en) 2008-06-25 2011-05-05 Uchiyama Manufacturing Corp. bearing seal
CN104482218A (en) * 2014-12-11 2015-04-01 重庆大学 Self-healing sealing device based on mangneto deformation rubber
CN104482218B (en) * 2014-12-11 2016-08-17 重庆大学 Self-healing seal device based on mangneto deformable rubber
CN106321845A (en) * 2016-11-09 2017-01-11 烟台润蚨祥油封有限公司 Automotive rotating oil seal having leakage storing and pumping-back functions

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