JP2005069467A - Sealing device with encoder - Google Patents

Sealing device with encoder Download PDF

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JP2005069467A
JP2005069467A JP2004098048A JP2004098048A JP2005069467A JP 2005069467 A JP2005069467 A JP 2005069467A JP 2004098048 A JP2004098048 A JP 2004098048A JP 2004098048 A JP2004098048 A JP 2004098048A JP 2005069467 A JP2005069467 A JP 2005069467A
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flange portion
magnetic encoder
sealing device
magnetic
axial direction
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JP4544401B2 (en
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Naoto Kobayashi
直人 小林
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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
    • 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
    • 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
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device 4 provided with a magnetic encoder 12, sealing an annular space formed between an inward member 1 and an outward member 2 rotating relatively and mutually, and capable of preventing increase of the number of parts and assembly man-hour and protecting an outer peripheral face of the magnetic encoder 12 without enlarging an installation space in the axial direction. <P>SOLUTION: This sealing device 4 is constituted in such a way that it has a cylindrical part fitted into a peripheral face of the inward member 1 and a sleeve 11 in which an inside diameter side flange part and an outside diameter side flange part extending in the radial direction which is an outer side in the axial direction from the cylindrical part are formed and which is made of a non-magnetic material. The flange part on one side among the flange parts supports so as to cover an outer side in the axial direction of the magnetic encoder 12 arranged in a recessed part 15 formed in an end part in the axial direction of the inward member 1, and a seal lip fixed on an outward member side comes into slide contact with the flange part on the other side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、磁気エンコーダを備え、互いに相対回転する内方部材および外方部材との間に形成される環状空間を密封するシール装置の構造に関する。更に詳しくは、自動車のアンチロックブレーキシステムにおける前後の車輪の回転数を検出する回転検出装置を持ったシール装置に関するものである。本発明のシール装置は家電製品、産業機械、自転車等の分野でも用いられる。   The present invention relates to a structure of a seal device that includes a magnetic encoder and seals an annular space formed between an inner member and an outer member that rotate relative to each other. More particularly, the present invention relates to a sealing device having a rotation detecting device for detecting the number of rotations of front and rear wheels in an antilock brake system of an automobile. The sealing device of the present invention is also used in the fields of household appliances, industrial machines, bicycles and the like.

従来、図４に示すよう転動体１０３を介して互いに相対回転する内方部材１０１および外方部材１０２間の環状空間を密封するシール装置１０５において、シール装置１０５に磁気エンコーダ１０６を一体化されたものが開発されている。シール装置１０５は、各々断面Ｌ字状とされた第一、第二のシール環状部材１０７，１０８を内方部材１０１および外方部材１０２にそれぞれ嵌合させ、第二のシール環状部材１０８にシール部材１０９を設け、シール部材１０９と一体に成形されているシールリップ１１０を第一の環状部材１０７に摺接させることにより、外部からの異物の混入を防止し、内部のグリースの流出を防止している。磁気エンコーダ１０６は、磁性体粉が混入されたゴムまたは樹脂等の弾性体で形成されており、第一のシール環状部材１０７のフランジ部外側面（図上右方向）に加硫接着している。磁気エンコーダ１０６は、外部からかけられた磁界により円周方向に交互に磁極が形成されており、近接配置された磁気センサ１１１で検出される。   Conventionally, in a sealing device 105 that seals an annular space between an inner member 101 and an outer member 102 that rotate relative to each other via a rolling element 103 as shown in FIG. 4, a magnetic encoder 106 is integrated with the sealing device 105. Things are being developed. The sealing device 105 has first and second seal annular members 107 and 108 each having an L-shaped cross section fitted to the inner member 101 and the outer member 102, respectively, and seals the second seal annular member 108. The member 109 is provided, and the seal lip 110 formed integrally with the seal member 109 is slidably contacted with the first annular member 107, thereby preventing the entry of foreign matter from the outside and preventing the internal grease from flowing out. ing. The magnetic encoder 106 is formed of an elastic body such as rubber or resin mixed with magnetic powder, and is vulcanized and bonded to the outer surface (right direction in the drawing) of the flange portion of the first seal annular member 107. . In the magnetic encoder 106, magnetic poles are alternately formed in the circumferential direction by a magnetic field applied from the outside, and are detected by a magnetic sensor 111 arranged in proximity.

この構成だと、磁気エンコーダ１０６および磁気センサ１１１が最も軸方向外側の大気に露出した位置に配置されているので、飛散する泥水、異物に直接曝され、また外部からの磁界を受ける等の過酷な状況にあり、そのために磁力の低下や磁力の乱れが発生し、安定した磁力の供給が難しい状況であった。また、異物が浸入して磁気エンコーダ１０６と磁気センサ１１１との間に付着すれば、最悪の場合、磁気エンコーダ１０６または磁気センサ１１１が異物の回転噛み込みによって損傷を起こし回転検出数を誤らせるというおそれがあった。   With this configuration, since the magnetic encoder 106 and the magnetic sensor 111 are arranged at the position exposed to the outermost atmosphere in the axial direction, they are directly exposed to scattered muddy water and foreign matter, and receive a magnetic field from the outside. For this reason, a decrease in magnetic force and a disturbance of the magnetic force occurred, and it was difficult to supply a stable magnetic force. In addition, if foreign matter enters and adheres between the magnetic encoder 106 and the magnetic sensor 111, in the worst case, the magnetic encoder 106 or the magnetic sensor 111 may be damaged due to the rotational biting of the foreign matter, resulting in an erroneous number of rotation detection. was there.

この対策として、図５に示すように、磁気エンコーダ１０６の軸方向外側に配置された保護板１１２で磁気エンコーダ１０６を包み込んで、保護する方法が採用されているが、保護板１１２を新たに設けるために部品点数や組付け工数の増加を招き、しかも、設定スペースが軸方向拡大するために、狭い空間に取り付けるには困難であった。   As a countermeasure against this, as shown in FIG. 5, a method of wrapping and protecting the magnetic encoder 106 with a protective plate 112 arranged on the outer side in the axial direction of the magnetic encoder 106 is employed. However, a protective plate 112 is newly provided. Therefore, the number of parts and assembly man-hours are increased, and the setting space is enlarged in the axial direction, so that it is difficult to mount in a narrow space.

また、特開平１１‐３０３８７９号およびＵＳ．ＰａｔｅｎｔＮｏ．５５７５５６８では、磁気エンコーダ１０６をシール装置とは別に設定することが開示されている。この構成は、設定スペースが拡大するという問題点は解消されるが、部品点数および組付け工数の増加に対しては、有効とはなりえなかった。   JP-A-11-303879 and US Pat. Patent No. US Pat. No. 5,575,568 discloses setting the magnetic encoder 106 separately from the sealing device. This configuration eliminates the problem of an increased setting space, but cannot be effective for increasing the number of parts and assembly man-hours.

特開平１１−３０３８７９号公報Japanese Patent Laid-Open No. 11-303879 ＵＳ．ＰａｔｅｎｔＮｏ．５５７５５６８公報US. Patent No. No. 5575568

本発明は以上の点に鑑みて、磁気エンコーダを備え、互いに相対回転する内方部材および外方部材との間に形成される環状空間を密封するシール装置において、部品点数および組付け工数の増加を防止し、しかも、設定スペースを拡大しないで磁気エンコーダの保護を可能にしたシール装置を提供することを目的とする。   In view of the above, the present invention provides an increase in the number of parts and assembly man-hours in a sealing device that includes a magnetic encoder and seals an annular space formed between an inner member and an outer member that rotate relative to each other. It is another object of the present invention to provide a sealing device that can protect the magnetic encoder without increasing the setting space.

上記目的を達成するため、本発明の請求項１に係るシール装置は、磁気エンコーダを備え、互いに相対回転する内方部材および外方部材との間に形成される環状空間を密封するシール装置において、前記内方部材の周面に嵌合する円筒部と、前記円筒部から軸方向外側であって径方向へ延出する内径側フランジ部および外径側フランジ部が形成される非磁性材製のスリーブを有し、前記フランジ部の内一方のフランジ部は前記内方部材の軸方向端部に形成された凹部に配置される前記磁気エンコーダの軸方向外側を覆うように支持し、前記他方のフランジ部には前記外方部材側に固定されたシールリップが摺接することを特徴とするものである。   To achieve the above object, a sealing device according to claim 1 of the present invention is a sealing device that includes a magnetic encoder and seals an annular space formed between an inner member and an outer member that rotate relative to each other. A non-magnetic material formed with a cylindrical portion that fits to the peripheral surface of the inner member, and an inner diameter side flange portion and an outer diameter side flange portion that are axially outer and extend radially from the cylindrical portion. The flange portion of the flange portion is supported so as to cover the axially outer side of the magnetic encoder disposed in a recess formed at the axial end portion of the inner member, and the other flange portion. The seal lip fixed to the outer member side is in sliding contact with the flange portion.

また、本発明の請求項２に係るシール装置は、請求項１のシール装置において、前記磁気エンコーダの軸方向外側を覆うように支持している前記フランジ部の内一方のフランジ部外側面の軸方向位置が、前記他方のフランジ部外側面の軸方向位置より内側に位置することを特徴とするものである。   A sealing device according to claim 2 of the present invention is the sealing device according to claim 1, wherein the shaft of the outer surface of one flange portion of the flange portion supported so as to cover the outer side in the axial direction of the magnetic encoder is provided. A direction position is located inside the axial direction position of said other flange part outer side surface, It is characterized by the above-mentioned.

また、本発明の請求項３に係るシール装置は、請求項１乃至２のシール装置において、前記スリーブが、前記内方部材の周面に嵌合する円筒部で折り返されていることを特徴とするものである。   According to a third aspect of the present invention, there is provided the sealing device according to the first or second aspect, wherein the sleeve is folded back at a cylindrical portion that is fitted to the peripheral surface of the inner member. To do.

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

すなわち、上記構成を備えた本発明の請求項１に係るシール装置は、内方部材の軸方向端部に形成された凹部内に配置されている磁気エンコーダを支持している内一方のフランジ部外側面の軸方向位置を、他方のフランジ部外側面の軸方向位置、並びに内方部材および外方部材の軸方向端面の位置と同一にすることができるので、軸方向のスペース拡大が不要となり、狭いスペース範囲でのシール装置の取付を可能とすることができる。   That is, the sealing device according to claim 1 of the present invention having the above-described configuration is the inner flange portion that supports the magnetic encoder disposed in the recess formed in the axial end portion of the inner member. Since the axial position of the outer surface can be made the same as the axial position of the outer surface of the other flange part and the axial end surfaces of the inner member and the outer member, it is not necessary to expand the axial space. Therefore, it is possible to mount the seal device in a narrow space range.

また、スリーブが２箇所のフランジ部を有し、その内一方のフランジ部が上記内方部材の軸方向端面に形成された凹部内に配置されている磁気エンコーダの軸方向外側を覆うように支持しているので、磁気エンコーダを泥水や異物からシールする機能を保持させるとともに、他方のフランジ部内側面にシールリップ部材を摺接させて外部からの異物が内部に侵入するのを阻止する機能を保持させている。即ち、一の部材であるスリーブでシール装置の構成部材としての機能のほかに磁気エンコーダ保護部材として機能を保持させているので、部品点数や組付け工数が増加せずに磁気エンコーダを保護することができる。特に、非磁性材のスリーブと内方部材との間に磁気エンコーダが挟み込まれているので、磁気エンコーダが外部からの泥水や異物および外部磁界等の影響を受けずに、安定した磁力を供給することが可能となる。   Further, the sleeve has two flange portions, and one of the flange portions is supported so as to cover the outside in the axial direction of the magnetic encoder disposed in the recess formed in the axial end surface of the inner member. Therefore, while maintaining the function of sealing the magnetic encoder from muddy water and foreign matter, the seal lip member is slidably in contact with the inner surface of the other flange part to prevent foreign matter from entering the inside. I am letting. That is, since the sleeve as a single member keeps the function as a magnetic encoder protection member in addition to the function as a component of the sealing device, the magnetic encoder can be protected without increasing the number of parts and the number of assembling steps. Can do. In particular, since the magnetic encoder is sandwiched between the sleeve of the nonmagnetic material and the inner member, the magnetic encoder supplies a stable magnetic force without being affected by muddy water, foreign matter, and external magnetic field from the outside. It becomes possible.

また、上記構成を備えた請求項２に係るシール装置においては、請求項１のシール装置において、磁気エンコーダを保持している一方のフランジ部外側面の位置が、他方のフランジ部外側面の位置、ならびに外方部材および内方部材の軸方向端面の位置より軸方向内側に位置することになるので、軸方向のスペースを拡大せずに、磁気センサを内方部材の軸方向端面に形成された凹部内に配置でき、泥水や異物等からエンコーダとともに磁気センサも保護することができる。   Moreover, in the sealing device according to claim 2 having the above-described configuration, in the sealing device of claim 1, the position of one flange portion outer surface holding the magnetic encoder is the position of the other flange portion outer surface. In addition, the magnetic sensor is formed on the axial end surface of the inner member without enlarging the axial space, because it is positioned axially inward from the positions of the axial end surfaces of the outer member and the inner member. The magnetic sensor can be protected together with the encoder from muddy water and foreign matter.

また、上記構成を備えた請求項３に係るシール装置においては、請求項１乃至２のシール装置において、スリーブが内方部材の周面に嵌合している円筒部で折り返されているために、シール装置の寿命を延長することができる。   Moreover, in the sealing device according to claim 3 having the above-described configuration, in the sealing device according to claim 1 or 2, since the sleeve is folded back by the cylindrical portion fitted to the peripheral surface of the inner member. The life of the sealing device can be extended.

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、シール装置を設置した車輪支持装置の要部断面図であり、図２は、本発明の実施例１に係るシール装置の断面図である。   FIG. 1 is a cross-sectional view of a main part of a wheel support device provided with a seal device, and FIG. 2 is a cross-sectional view of the seal device according to Embodiment 1 of the present invention.

図１に示すように、このシール装置４，５は、転動体３を介して互いに相対回転する内方部材１および外方部材２により形成される環状空間を密封するように両端に取り付けられている。一端のシール装置４は、回転数を計測する磁気エンコーダ１２を備えている。内方部材１および外方部材２は、転動体３の軌道面１ａ，２ａを有しており、各軌道面１ａ，２ａは溝状に形成されている。内方部材１および外方部材２は、軸受内輪および軸受外輪の単独であっても、これら軸受内輪や軸受外輪と別の部品とが組み合わさった、組立部材であっても良い。また、内方部材１は、軸であっても良い。   As shown in FIG. 1, the sealing devices 4 and 5 are attached to both ends so as to seal the annular space formed by the inner member 1 and the outer member 2 that rotate relative to each other via the rolling elements 3. Yes. The sealing device 4 at one end includes a magnetic encoder 12 that measures the number of rotations. The inner member 1 and the outer member 2 have raceway surfaces 1a and 2a of the rolling element 3, and each raceway surface 1a and 2a is formed in a groove shape. The inner member 1 and the outer member 2 may be a bearing inner ring and a bearing outer ring alone, or may be an assembly member in which these bearing inner ring and bearing outer ring are combined with another component. Further, the inner member 1 may be a shaft.

図２は、磁気エンコーダ１２を備えたシール装置４を拡大したものであって、このシール装置４は、内方部材１の軸方向端部に形成された凹部１５内に配置されている磁気エンコーダ１２と、内方部材１の周面１ａに嵌合し２箇所のフランジ部１１ａ，１１ｃを有するスリーブ１１と、外方部材２の径方向端面２ａに嵌合しているシール環状部材１３と、シール環状部材１３に加硫接着されているシール部材１４とを備えている。   FIG. 2 is an enlarged view of the sealing device 4 provided with the magnetic encoder 12, and this sealing device 4 is disposed in a recess 15 formed at the axial end of the inner member 1. 12, a sleeve 11 fitted to the peripheral surface 1 a of the inner member 1 and having two flange portions 11 a and 11 c, a seal annular member 13 fitted to the radial end surface 2 a of the outer member 2, And a seal member 14 that is vulcanized and bonded to the seal annular member 13.

磁気エンコーダ１２は、内方部材１の軸方向端部に形成された凹部１５内に配置されている。磁気エンコーダ１２は、ゴム材にフェライト系磁粉、希土類磁粉、アルコニ磁粉等の磁性体を単独または混合して加えたものを加硫成形後に磁化したものであり、円周方向に交互に磁極が形成されており、近接配置された磁気センサ６で検出される。磁気エンコーダ１２は、内方部材１の軸方向端部に形成された凹部１５の底面１５ａに密接しており、後述するスリーブ１１の保護用フランジ部１１ｃの内側面１１ｇに加硫接着している。   The magnetic encoder 12 is disposed in a recess 15 formed at the axial end of the inner member 1. The magnetic encoder 12 is magnetized after vulcanization molding of a magnetic material such as ferrite-based magnetic powder, rare-earth magnetic powder, or arkoni magnetic powder added to a rubber material, and magnetic poles are alternately formed in the circumferential direction. It is detected by the magnetic sensor 6 arranged in proximity. The magnetic encoder 12 is in close contact with the bottom surface 15a of the recess 15 formed at the end of the inner member 1 in the axial direction, and is vulcanized and bonded to an inner side surface 11g of a protective flange portion 11c of the sleeve 11 described later. .

スリーブ１１は、内方部材１の周面１ａに嵌合している円筒部１１ｂでの折り返しにより２箇所のフランジ部１１ａ，１１ｃを有しており、一方のシール用フランジ部１１ａは、円筒部１１ｂの外径部１１ｄとで略逆Ｌ字状を形成し、後述するシール環状部材１３と対向して、シール部を形成している。他方の保護用フランジ部１１ｃは磁気エンコーダ１２の軸方向外側にあって、磁気エンコーダ１２を覆うように支持するとともに泥水や異物から保護している。スリーブ１１は、内包する磁気エンコーダ１２が発生する磁場を有効最大に磁気センサ６へ届かせるために、非磁性材の材料で成形されている。   The sleeve 11 has two flange portions 11a and 11c by folding back at a cylindrical portion 11b fitted to the peripheral surface 1a of the inner member 1, and one of the sealing flange portions 11a is a cylindrical portion. A substantially inverted L-shape is formed with the outer diameter portion 11d of 11b, and a seal portion is formed facing a seal annular member 13 described later. The other protective flange portion 11c is on the outer side in the axial direction of the magnetic encoder 12, supports the magnetic encoder 12 so as to cover it, and protects it from muddy water and foreign matter. The sleeve 11 is formed of a non-magnetic material so that the magnetic field generated by the magnetic encoder 12 contained therein can reach the magnetic sensor 6 to an effective maximum.

シール環状部材１３は、外方部材２に嵌合している円筒部１３ａと円筒部の軸方向一端から径方向に伸びているフランジ部１３ｂとにより形成されている。シール環状部材１３の内径側には、ゴム状弾性体のシール部材１４が加硫接着されている。   The seal annular member 13 is formed by a cylindrical portion 13a fitted to the outer member 2 and a flange portion 13b extending in the radial direction from one axial end of the cylindrical portion. A rubber-like elastic seal member 14 is vulcanized and bonded to the inner diameter side of the seal annular member 13.

シール部材１４は、一方のシール用フランジ部１１ａの内側面１１ｆに摺接するシールリップ１４ａと、内方部材１の周面１ａで嵌合している円筒部１１ｂの外径部１１ｄの外径面１１ｋに摺接するシールリップ１４ｂ，１４ｃとを一体として有している。   The seal member 14 includes a seal lip 14a that is in sliding contact with the inner surface 11f of one seal flange portion 11a, and an outer diameter surface of the outer diameter portion 11d of the cylindrical portion 11b that is fitted on the peripheral surface 1a of the inner member 1. The seal lips 14b and 14c that are in sliding contact with 11k are integrally provided.

なお、図３の実施例２に示すように、内方部材１の軸方向端部に形成されている凹部１５の深さｈを変更することにより、保護用シールフランジ部１１ｃの外側面１１ｉの軸方向位置をシール用フランジ部１１ａの外側面１１ｈ、並びに内方部材１の軸方向端面１ｂおよび外方部材２の軸方向端面２ｂより軸方向内側に位置させて磁気センサ６を凹部１５内に配置しても良い。   In addition, as shown in Example 2 of FIG. 3, the outer surface 11i of the protective seal flange portion 11c is changed by changing the depth h of the concave portion 15 formed at the axial end portion of the inner member 1. The magnetic sensor 6 is placed in the recess 15 by positioning the axial position axially inside the outer surface 11h of the sealing flange portion 11a, the axial end surface 1b of the inner member 1 and the axial end surface 2b of the outer member 2. It may be arranged.

また、磁性エンコーダ１２を形成している材質は、ゴム材以外のプラスチック等の合成樹脂であっても良い。   The material forming the magnetic encoder 12 may be a synthetic resin such as a plastic other than a rubber material.

また、シール用フランジ部１１ａの内側面１１ｆおよび円筒部１１ｂの外径部１１ｄの外径面１１ｋに摺接するシールリップの形状、向き、および個数等は、シール性を考慮して使用条件により適宜選択するものとする。   Further, the shape, orientation, number, etc. of the seal lips that are in sliding contact with the outer surface 11k of the inner surface 11f of the sealing flange portion 11a and the outer diameter portion 11d of the cylindrical portion 11b are appropriately determined depending on the use conditions in consideration of the sealing property Shall be selected.

この構成のシール装置によると、内方部材１の軸方向端部に形成された凹部１５内に配置されている磁気エンコーダ１２を支持している一方の保護用フランジ部１１ｃの外側面１１ｉの軸方向位置を、他方のシール用フランジ部１１ａの外側面１１ｈの軸方向位置、並びに内方部材１の軸方向端面１ｂおよび外方部材２の軸方向端面２ｂの位置と同一にすることができるので、軸方向のスペース拡大が不要となり、狭いスペース範囲での磁気エンコーダ１２を備えたシール装置４の取付を可能とすることができる。   According to the sealing device of this configuration, the shaft of the outer surface 11i of the one protective flange portion 11c supporting the magnetic encoder 12 disposed in the recess 15 formed in the axial end of the inner member 1 is supported. Since the direction position can be the same as the axial position of the outer surface 11h of the other sealing flange portion 11a and the positions of the axial end face 1b of the inner member 1 and the axial end face 2b of the outer member 2. The space expansion in the axial direction is not necessary, and the sealing device 4 including the magnetic encoder 12 can be attached in a narrow space range.

また、スリーブ１１を内方部材１の周面１ａに嵌合している部分で折り返すことにより２箇所のフランジ部１１ａ，１１ｃを設け、一方の保護用フランジ部１１ｃが内方部材１の軸方向端部に形成された凹部１５内に配置されている磁気エンコーダ１２の軸方向外側を覆うように支持しているので、磁気エンコーダ１２を泥水や異物からシールし、また、スリーブ１１は非磁性体の材料で成形されているので磁界の影響を受けず、磁気エンコーダ１２が安定した磁力の供給を可能にする機能を保持させている。他方のシール用フランジ部１１ａは、内側面１１ｆと円筒部１１ｂの外径部１１ｄの外径面１１ｋにシールリップ１４ａ，１４ｂ，１４ｃを摺接させて外部からの異物が内部に侵入するのを阻止し、内部のグリースが流出するのを防止する機能を保持させている。即ち、一の部材であるスリーブ１１でシール部の構成部材としての機能のほかに磁気エンコーダ保護部材として機能を保持させているので、部品点数や組付け工数が増加せずに磁気エンコーダを保護することができる。   Further, the flange 11 is provided at two locations by folding the sleeve 11 at a portion where the sleeve 11 is fitted to the peripheral surface 1 a of the inner member 1, and one of the protective flange portions 11 c is in the axial direction of the inner member 1. Since the magnetic encoder 12 is supported so as to cover the outer side in the axial direction of the magnetic encoder 12 disposed in the recess 15 formed at the end, the magnetic encoder 12 is sealed from muddy water and foreign matter, and the sleeve 11 is a non-magnetic material. Therefore, the magnetic encoder 12 does not receive the influence of the magnetic field, and retains the function of enabling the stable magnetic force supply. The other sealing flange portion 11a allows foreign matters from entering the inside by sliding the seal lips 14a, 14b, 14c to the outer surface 11k of the inner surface 11f and the outer diameter portion 11d of the cylindrical portion 11b. The function of preventing and preventing the internal grease from flowing out is retained. That is, since the sleeve 11 as one member has a function as a magnetic encoder protection member in addition to a function as a constituent member of the seal portion, the magnetic encoder is protected without increasing the number of parts and assembling steps. be able to.

更にまた、磁気エンコーダ１２の軸方向外側を覆うように支持している一方の保護用フランジ部１１ｃの外側面１１ｉの軸方向位置が、他方のシール用フランジ部１１ａの外側面１１ｈの軸方向位置、ならびに外方部材２の軸方向端面２ｂおよび内方部材１の軸方向端面１ｂの位置より軸方向内側に位置させた場合には、磁気センサ６を内方部材１の軸方向端部に形成された凹部１５内に配置でき、泥水や異物等からエンコーダとともに磁気センサも保護することができる。   Furthermore, the axial position of the outer surface 11i of the one protective flange portion 11c that supports the magnetic encoder 12 so as to cover the outer side in the axial direction is the axial position of the outer surface 11h of the other sealing flange portion 11a. In addition, the magnetic sensor 6 is formed at the axial end portion of the inner member 1 when it is positioned axially inward from the positions of the axial end surface 2b of the outer member 2 and the axial end surface 1b of the inner member 1. The magnetic sensor can be protected together with the encoder from muddy water and foreign matter.

シール装置を設置した車輪支持装置の要部断面図Cross-sectional view of the main part of a wheel support device with a sealing device installed 本発明に係る実施例１のシール装置の断面図Sectional drawing of the sealing apparatus of Example 1 which concerns on this invention 本発明に係る実施例２のシール装置の断面図Sectional drawing of the sealing apparatus of Example 2 which concerns on this invention 従来例におけるシール装置の断面図Sectional view of the sealing device in the conventional example 別の従来例におけるシール装置の断面図Sectional drawing of the sealing device in another conventional example

符号の説明Explanation of symbols

１ 内方部材
２ 外方部材
３ 転動体
４、５ シール装置
６ 磁気センサ
１１ スリーブ
１２ 磁気エンコーダ
１３ シール環状部材
１４ シール部材
１５ 凹部 DESCRIPTION OF SYMBOLS 1 Inner member 2 Outer member 3 Rolling body 4, 5 Sealing device 6 Magnetic sensor 11 Sleeve 12 Magnetic encoder 13 Seal annular member 14 Seal member 15 Recessed part

Claims (3)

磁気エンコーダを備え、互いに相対回転する内方部材および外方部材との間に形成される環状空間を密封するシール装置において、
前記内方部材の周面に嵌合する円筒部と、前記円筒部から軸方向外側であって径方向へ延出する内径側フランジ部および外径側フランジ部が形成される非磁性材製のスリーブを有し、前記フランジ部の内一方のフランジ部は前記内方部材の軸方向端部に形成された凹部に配置される前記磁気エンコーダの軸方向外側を覆うように支持し、前記他方のフランジ部には前記外方部材側に固定されたシールリップが摺接することを特徴とするシール装置。 In a sealing device that includes a magnetic encoder and seals an annular space formed between an inner member and an outer member that rotate relative to each other,
A non-magnetic material made of a cylindrical portion that fits to the peripheral surface of the inner member, and an inner diameter side flange portion and an outer diameter side flange portion that are axially outer and extend radially from the cylindrical portion. A flange portion, and one flange portion of the flange portion is supported so as to cover an outer side in the axial direction of the magnetic encoder disposed in a recess formed in an axial end portion of the inner member, and the other flange portion is supported. A seal device, wherein a seal lip fixed to the outer member side is in sliding contact with the flange portion. 前記磁気エンコーダの軸方向外側を覆うように支持している前記フランジ部の内一方のフランジ部外側面の軸方向位置が、前記他方のフランジ部外側面の軸方向位置より内側に位置することを特徴とする請求項１のシール装置。   The axial position of the outer surface of one flange portion of the flange portion that is supported so as to cover the outer side of the magnetic encoder in the axial direction is located inside the axial position of the outer surface of the other flange portion. The sealing device according to claim 1. 前記スリーブが、前記内方部材の周面に嵌合する円筒部で折り返されていることを特徴とする請求項１乃至２記載のシール装置。   The sealing device according to claim 1, wherein the sleeve is folded back at a cylindrical portion that is fitted to a peripheral surface of the inner member.
JP2004098048A 2003-08-05 2004-03-30 Sealing device Expired - Fee Related JP4544401B2 (en)

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
US7232129B2 (en) * 2004-10-12 2007-06-19 Nok Corporation Sealing apparatus with encoder
DE102006044272A1 (en) * 2006-09-20 2008-04-03 Schaeffler Kg Rolling bearing seal for a rolling bearing of a wheel hub comprises a sealing lip arrangement having radial sealing lips arranged behind each other in the direction of the bearing axis
WO2014060043A1 (en) * 2012-10-19 2014-04-24 Aktiebolaget Skf Rolling bearing with sealing subassembly
JP2018059559A (en) * 2016-10-04 2018-04-12 ナブテスコ株式会社 Seal and seal mechanism

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DE102014219859A1 (en) * 2014-09-30 2016-03-31 Aktiebolaget Skf Universal joint

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JP2001215132A (en) * 2000-02-01 2001-08-10 Ntn Corp Bearing for wheel
JP2001241435A (en) * 2000-02-29 2001-09-07 Nsk Ltd Rolling bearing unit with encoder for automobile
JP2001242188A (en) * 2000-02-25 2001-09-07 Nsk Ltd Roll bearing unit with encoder for detecting rotating state

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JPH0933549A (en) * 1995-07-14 1997-02-07 Nippon Seiko Kk Rolling bearing unit with revolving speed detecting device
JPH10160744A (en) * 1996-10-28 1998-06-19 Fag Automobiltechnik Ag Anti-friction bearing device with protected detecting device of number of revolution
JP2001215132A (en) * 2000-02-01 2001-08-10 Ntn Corp Bearing for wheel
JP2001242188A (en) * 2000-02-25 2001-09-07 Nsk Ltd Roll bearing unit with encoder for detecting rotating state
JP2001241435A (en) * 2000-02-29 2001-09-07 Nsk Ltd Rolling bearing unit with encoder for automobile

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7232129B2 (en) * 2004-10-12 2007-06-19 Nok Corporation Sealing apparatus with encoder
DE102006044272A1 (en) * 2006-09-20 2008-04-03 Schaeffler Kg Rolling bearing seal for a rolling bearing of a wheel hub comprises a sealing lip arrangement having radial sealing lips arranged behind each other in the direction of the bearing axis
WO2014060043A1 (en) * 2012-10-19 2014-04-24 Aktiebolaget Skf Rolling bearing with sealing subassembly
JP2018059559A (en) * 2016-10-04 2018-04-12 ナブテスコ株式会社 Seal and seal mechanism
KR20180037574A (en) * 2016-10-04 2018-04-12 나부테스코 가부시키가이샤 Seal and seal mechanism
TWI725228B (en) * 2016-10-04 2021-04-21 日商納博特斯克股份有限公司 Seal mechanism
KR102437869B1 (en) * 2016-10-04 2022-08-31 나부테스코 가부시키가이샤 Seal and seal mechanism

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