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JP5145801B2 - Wheel bearing device - Google Patents
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JP5145801B2 - Wheel bearing device - Google Patents

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JP5145801B2
JP5145801B2 JP2007189273A JP2007189273A JP5145801B2 JP 5145801 B2 JP5145801 B2 JP 5145801B2 JP 2007189273 A JP2007189273 A JP 2007189273A JP 2007189273 A JP2007189273 A JP 2007189273A JP 5145801 B2 JP5145801 B2 JP 5145801B2
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ring
outer peripheral
peripheral surface
press
pulsar
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JP2009024793A (en
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茂 井上
重明 古澤
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JTEKT Corp
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JTEKT Corp
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Priority to JP2007189273A priority Critical patent/JP5145801B2/en
Priority to PCT/JP2008/062905 priority patent/WO2009014059A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/02—Hubs adapted to be rotatably arranged on axle
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C19/185—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 with two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/80—Manufacturing details of magnetic targets for magnetic encoders

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、例えば自動車のホイール用軸受装置に係り、より詳しくは、ホイールの回転を検出するパルサーリングを備えたホイール用軸受装置に関するものである。   The present invention relates to a wheel bearing device for an automobile, for example, and more particularly to a wheel bearing device provided with a pulsar ring that detects rotation of a wheel.

従来のホイール用軸受に、内部部材と、外部部材と、内外部材間に配置された転動体と、外側部材の端面に配置されたパルサーリングとを有し、このパルサーリングが、外側部材の外周面に嵌合固定される円環部と、この円環部の一端から半径方向に延びて外側部材の端面を覆う円輪部とからなり、この円輪部に、円周上に複数個等間隔に配置されかつ径方向にのみ解放された円周方向の幅及び深さが一定の矩形状窪み部が形成され、この窪み部により形成される円周凹凸部がパルサー部とされたものがある（例えば、特許文献１参照）。   A conventional wheel bearing has an inner member, an outer member, a rolling element disposed between the inner and outer members, and a pulsar ring disposed on an end surface of the outer member. It consists of an annular part fitted and fixed to the surface, and an annular part extending radially from one end of the annular part and covering the end face of the outer member. A rectangular hollow portion having a constant circumferential width and depth that is disposed at intervals and released only in the radial direction is formed, and a circumferential uneven portion formed by the hollow portion is a pulsar portion. Yes (for example, see Patent Document 1).

特開２０００−１１０４号公報（第２−３頁、図１−３）Japanese Patent Laid-Open No. 2000-1104 (page 2-3, FIG. 1-3)

特許文献１のホイール用軸受によれば、パルサーリングの外輪肉厚を厚くせずに窪み部の径方向の長さを長くすることができ、さらに板厚を厚くすることなく窪み部を深くできて、センサ出力を十分確保することができる。
しかしながら、ホイールの回転等によってパルサーリングに泥水等がかかって窪み部が埋められてしまうことがあるため、このようなパルサーリングに代えて、ステンレス鋼板を芯材とし、この芯材を、円環部の外周面にパルサー部が設けられた着磁ゴムで被覆して、芯材を外輪に圧入するようにしたパルサーリングが使用されるようになった。 According to the wheel bearing of Patent Document 1, it is possible to increase the length in the radial direction of the recess without increasing the thickness of the outer ring of the pulsar ring, and to deepen the recess without increasing the plate thickness. Thus, sufficient sensor output can be secured.
However, since the pulsar ring may be covered with muddy water or the like due to the rotation of the wheel and the like, the hollow portion may be filled. Instead of such a pulsar ring, a stainless steel plate is used as a core material, and the core material is A pulsar ring in which the outer peripheral surface of the portion is covered with a magnetized rubber provided with a pulsar portion and the core material is press-fitted into the outer ring has come to be used.

このようなパルサーリングにおいて、芯材にステンレス鋼板を用いると高価になるため、最近ではステンレス鋼板に代えて、芯材に例えば冷間圧延鋼板の如き鋼板を用いたパルサーリングが実用化されている。
このように、鋼板からなる芯材を着磁ゴムで被覆したパルサーリングは、芯材にステンレス鋼板を使用した場合に比べて安価になるが、この芯材を外輪の外周に圧入してパルサーリングを取付けた場合、ホイールの回転等によって飛散した水が、着磁ゴムと外輪との接触部から内部に浸入し、芯金に錆が発生して着脱ゴムと芯金の接合が弱まる場合があった。 In such a pulsar ring, since it becomes expensive when a stainless steel plate is used as a core material, a pulsar ring using a steel plate such as a cold rolled steel plate as a core material instead of a stainless steel plate has recently been put into practical use. .
Thus, the pulsar ring in which the core material made of steel plate is covered with magnetized rubber is less expensive than the case where a stainless steel plate is used as the core material, but this core material is press-fitted into the outer circumference of the outer ring to pulsar ring. When the is attached, water splashed by the rotation of the wheel may enter the inside from the contact area between the magnetized rubber and the outer ring, causing rust on the core metal and weakening the connection between the removable rubber and the core metal. It was.

本発明は、上記の課題を解決するためになされたもので、外輪に圧入される鋼板製の芯金とこの芯金の外面を覆う着磁ゴムとからなるパルサーリングにおいて、芯金と外輪との接触部から水が浸入することがなく、このため着磁ゴムと芯金の接合が確実であり、信頼性の高いパルサーリングを備えたホイール用軸受装置を提供することを目的としたものである。   The present invention has been made in order to solve the above-described problem, and in a pulsar ring comprising a steel core made of steel sheet press-fitted into an outer ring and a magnetized rubber covering the outer surface of the core metal, the core metal and the outer ring The purpose of this is to provide a wheel bearing device equipped with a reliable pulsar ring, in which water does not enter from the contact portion of the steel, and the magnetized rubber and the core metal are reliably joined. is there.

本発明は、内輪、外輪、これら内輪と外輪の間に配設された転動体、及び前記外輪の端部外周縁に装着されたパルサーリングを有するホイール用軸受装置において、
前記パルサーリングを、中心穴を有する側面部及び該側面部の外周が軸方向の内側に折曲げられた圧入部からなり、該圧入部が前記外輪の外周面に圧入される鋼板製の芯金と、中心穴を有する側面部及び該側面部の外周側が軸方向の内側に折曲げられた円環部からなり、該円環部の外周面又は前記側面部の表面にパルサー部が形成されて前記芯金の外面を覆う着磁ゴムとによって構成し、前記着磁ゴムに、前記パルサーリングを外輪の外周面に圧入したときに、前記外輪と芯金の軸方向両端部をシールするシール手段を設け、
前記芯金の圧入部の外周面側の外周側にほぼ逆Ｕ字状の折曲げ部を設けると共に、該圧入部の軸方向側内周面に大径部を設け、前記着磁ゴムに、前記芯金の折曲げ部に対応して凹部を設けると共に、外周面側に設けた溝部の側壁の外周側に前記芯金の折曲げ部の凹部に嵌入する嵌入部を設け、軸方向側の内周に設けられて外周面が前記芯金の大径部に嵌合し内周面に膨出部が形成された舌片からなるシール手段を設けたものである。 The present invention relates to a wheel bearing device having an inner ring, an outer ring, a rolling element disposed between the inner ring and the outer ring, and a pulsar ring mounted on an outer peripheral edge of the outer ring.
The pulsar ring comprises a side wall portion having a center hole and a press-fit portion in which the outer periphery of the side surface portion is bent inward in the axial direction, and the press-fit portion is press-fitted into the outer peripheral surface of the outer ring. And a side surface portion having a center hole and an annular portion in which the outer peripheral side of the side surface portion is bent inward in the axial direction, and a pulsar portion is formed on the outer peripheral surface of the annular portion or the surface of the side surface portion. Sealing means comprising: a magnetized rubber covering an outer surface of the core metal; and sealing the axial ends of the outer ring and the core metal when the pulsar ring is press-fitted into the outer peripheral surface of the outer ring. Provided ,
While providing a substantially inverted U-shaped bent portion on the outer peripheral side of the outer peripheral surface side of the press-fitting portion of the metal core, providing a large diameter portion on the inner peripheral surface in the axial direction of the press-fitting portion, A concave portion is provided corresponding to the bent portion of the core metal, and a fitting portion is provided on the outer peripheral side of the side wall of the groove portion provided on the outer peripheral surface side to be fitted into the concave portion of the bent portion of the core metal. Sealing means is provided which is provided on the inner periphery and includes a tongue piece having an outer peripheral surface fitted into the large diameter portion of the cored bar and having a bulging portion formed on the inner peripheral surface .

上記の着磁ゴムのシール手段を、該着磁ゴムの外周面側に設けられて前記芯金の側面部が挿入される溝部、該溝部の軸方向側の側壁、及び軸方向側に設けた舌片によって構成した。   The magnetized rubber sealing means is provided on the outer peripheral surface side of the magnetized rubber so as to be inserted into the side surface of the cored bar, on the side wall on the axial side of the groove, and on the axial side. Consists of tongue pieces.

上記の着磁ゴムのシール手段を、該着磁ゴムの側面部内周側において軸方向側に斜め下方に延設されたリップと、軸方向側の内周に設けられて内周面に膨出部が形成された舌片とによって構成した。   The magnetized rubber sealing means includes a lip that extends obliquely downward in the axial direction on the inner peripheral side of the magnetized rubber, and an inner peripheral surface that bulges on the inner peripheral surface. And a tongue piece formed with a portion.

また、上記の芯金の圧入部の外周面側の外周側にほぼ逆Ｕ字状の折曲げ部を設けると共に、該圧入部の軸方向側内周面に大径部を設け、前記着磁ゴムに、前記芯金の折曲げ部に対応して凹部を設けると共に、外周面側に設けた溝部の側壁の外周側に前記芯金の折曲げ部の凹部に嵌入する嵌入部を設け、軸方向側の内周に設けられて外周面が前記芯金の大径部に嵌合し内周面に膨出部が形成された舌片からなるシール手段を設けた。   Further, a substantially inverted U-shaped bent portion is provided on the outer peripheral side of the outer peripheral surface side of the press-fitting portion of the cored bar, and a large-diameter portion is provided on the inner peripheral surface in the axial direction of the press-fitted portion. The rubber is provided with a recess corresponding to the bent portion of the core metal, and an insertion portion is provided on the outer peripheral side of the side wall of the groove portion provided on the outer peripheral surface side to be inserted into the concave portion of the bent portion of the core metal. Seal means comprising a tongue piece provided on the inner circumference on the direction side and having an outer circumferential surface fitted to the large diameter portion of the cored bar and a bulging portion formed on the inner circumferential surface was provided.

本発明は、外輪に圧入される鋼板製の芯金と、外面にパルサー部が設けられ芯金の外面を被覆する着磁ゴムとによって構成されたパルサーリングの着磁ゴムにシール部を設け、外輪と芯金との接触部をこのシール部で水密にシールするようにしたので、芯金が水によって錆ることがなく、このため着磁ゴムが芯金から剥離することのない、信頼性の高いパルサーリングを備えたホイール用軸受装置を得ることができる。   The present invention is provided with a seal portion on the magnetized rubber of the pulsar ring composed of a steel plate core pressed into the outer ring and a magnetized rubber provided with a pulsar portion on the outer surface and covering the outer surface of the core metal, The contact part between the outer ring and the cored bar is sealed watertight with this seal part, so the cored bar is not rusted by water, so the magnetized rubber does not peel off from the cored bar. A wheel bearing device having a high pulsar ring can be obtained.

［実施の形態１］
図１は本発明の実施の形態１に係るホイール用軸受装置の縦断面図である。なお、以下の説明では、図の右側（外周面側）をインナ側、左側（軸方向側）をアウタ側という。
図において、１はホイール用軸受装置である。２は軸受用鋼材からなり、２分割された内輪で、軸方向の両側に設けた鍔部の間には、２列の転走面（軌道面）３ａ，３ｂが設けられている。 [Embodiment 1]
FIG. 1 is a longitudinal sectional view of a wheel bearing device according to Embodiment 1 of the present invention. In the following description, the right side (outer peripheral surface side) of the drawing is referred to as the inner side, and the left side (axial direction side) is referred to as the outer side.
In the figure, reference numeral 1 denotes a wheel bearing device. 2 is an inner ring divided into two parts, and two rows of rolling surfaces (track surfaces) 3a and 3b are provided between the flanges provided on both sides in the axial direction.

５は軸受用鋼材からなる外輪で、内周面には内輪２の転走面３ａ，３ｂに対応して転走面６ａ，６ｂが設けられており、アウタ側の外周には、ホイール（図示せず）が取付けられるボルト９が圧入される複数のボルト穴８を有するフランジ７が設けられている。
１０は保持器１１ａ，１１ｂの周方向に所定の間隔で設けられた複数のポケットに、それぞれ転動自在に保持された軸受用鋼材からなる転動体としての玉で、内輪２と外輪５の転走面３ａと６ａ、３ｂと６ｂの間に配設されている。１２ａ，１２ｂは内輪２と外輪５の間のインナ側とアウタ側の開口部に装着されたシール材である。 Reference numeral 5 denotes an outer ring made of a steel material for bearings. Rolling surfaces 6a and 6b are provided on the inner peripheral surface corresponding to the rolling surfaces 3a and 3b of the inner ring 2, and a wheel (see FIG. A flange 7 having a plurality of bolt holes 8 into which a bolt 9 to which a bolt (not shown) is attached is press-fitted is provided.
Reference numeral 10 denotes a ball as a rolling element made of a bearing steel material that is rotatably held in a plurality of pockets provided at predetermined intervals in the circumferential direction of the cages 11a and 11b. It is arranged between the running surfaces 3a and 6a, 3b and 6b. Reference numerals 12a and 12b denote seal members attached to the inner side and outer side openings between the inner ring 2 and the outer ring 5, respectively.

２０は例えば冷間圧延鋼板（以下、単に鋼板という）からなり、外輪５のインナ側の外周に圧入される芯金２１と、外周面にパルサー部が設けられて芯金２１の外面を覆う着磁ゴム３０とからなるパルサーリングで、その詳細を図２、図３に示す。なお、芯金２１を冷間圧延鋼板で形成したのは、ステンレス合金材よりパルサリング２０の磁力が向上するためで、これにより、回転数検出精度を向上することができる。   20 is made of, for example, a cold-rolled steel plate (hereinafter simply referred to as a steel plate). FIG. 2 and FIG. 3 show the details of the pulsar ring composed of the magnetic rubber 30. The core bar 21 is formed of a cold-rolled steel plate because the magnetic force of the pulsar ring 20 is improved as compared with the stainless alloy material, thereby improving the rotational speed detection accuracy.

図２（ａ）は芯金２１の平面図、図２（ｂ）はそのＡ−Ａ断面図である。
この芯金２１は円形の鋼板をプレス加工により成形したもので、中心部には外輪５の内径とほぼ等しい径の中心穴２２が設けられており、その外周には環状の側面部２３が設けられ、側面部２３の外周側はアウタ側にほぼ直角に折曲げられて、外輪５のインナ側外周に圧入される円筒状の圧入部２４が形成されている。２５は圧入部２４のアウタ側先端部の内周に設けた面取り部である。 FIG. 2A is a plan view of the cored bar 21, and FIG.
The metal core 21 is formed by pressing a circular steel plate, and a central hole 22 having a diameter substantially equal to the inner diameter of the outer ring 5 is provided in the central portion, and an annular side surface portion 23 is provided on the outer periphery thereof. The outer peripheral side of the side surface portion 23 is bent substantially perpendicularly to the outer side to form a cylindrical press-fit portion 24 that is press-fitted into the outer periphery of the outer ring 5. Reference numeral 25 denotes a chamfered portion provided on the inner periphery of the outer end of the press-fit portion 24.

図３（ａ）は着磁ゴム３０の平面図、図３（ｂ）はそのＢ−Ｂ断面図である。
この着磁ゴム３０は磁性材が混入されたゴム材を成型加工したもので、中心部には芯金２１の中心穴２２より若干小径の中心穴３１が設けられており、その外周には環状の側面部３２が設けられている。そして、側面部３２の外周側はアウタ側にほぼ直角に折曲げられて円環部３３が形成されており、円環部３３の外周面の周方向にはＳ極とＮ極が交互に着磁されたパルサー部（図示せず）が設けられている。 3A is a plan view of the magnetized rubber 30, and FIG. 3B is a cross-sectional view taken along the line BB.
This magnetized rubber 30 is formed by molding a rubber material mixed with a magnetic material. A center hole 31 having a slightly smaller diameter than the center hole 22 of the cored bar 21 is provided at the center, and an annular shape is provided on the outer periphery thereof. Side surface portion 32 is provided. The outer peripheral side of the side surface portion 32 is bent substantially perpendicularly to the outer side to form an annular portion 33, and the S pole and the N pole are alternately attached in the circumferential direction of the outer peripheral surface of the annular portion 33. A magnetized pulsar part (not shown) is provided.

また、側面部３２の内周縁は、アウタ側に折曲げられたのち外周側に折曲げられて側壁３４が形成され、側面部３２との間にシール部である環状の溝部３５が設けられている。さらに、円環部３３のアウタ側には、中心部側に折曲げられた短かいフランジ部３６が設けられており、フランジ部３６の内周縁にはインナ側に突出するシール部である舌片３７が設けられている。   Further, the inner peripheral edge of the side surface portion 32 is bent to the outer side and then bent to the outer peripheral side to form a side wall 34, and an annular groove 35 serving as a seal portion is provided between the side surface portion 32 and the side surface portion 32. Yes. Further, a short flange portion 36 bent toward the center portion side is provided on the outer side of the annular portion 33, and a tongue piece which is a seal portion protruding toward the inner side on the inner peripheral edge of the flange portion 36. 37 is provided.

上記のように構成した着磁ゴム３０において、側面部３２の内のり高さｈ1 は芯金２１の側面部２３の高さｈと、円環部３３の内のり幅ｗ1 は芯金２１の圧入部２４の幅ｗと、溝部３５の幅ｔ1 は芯金２１の側面部２３の板厚ｔと、それぞれほぼ等しいか又は僅かに小さく形成されており、また、フランジ部３６の舌片３７を含む内のり高さｔ3は、芯金２１の圧入部２４の板厚ｔ2より若干大きく形成されている。
そして、これら側面部３２、円環部３３、溝部３５及びリップ３７を含むフランジ部３６により、芯金２１の被覆部３８が形成される。 In the magnetized rubber 30 configured as described above, the inner height h 1 of the side surface portion 32 is the height h of the side surface portion 23 of the core metal 21, and the inner width w 1 of the annular portion 33 is the press fit of the core metal 21. The width w of the portion 24 and the width t 1 of the groove portion 35 are substantially equal to or slightly smaller than the plate thickness t of the side surface portion 23 of the core metal 21, and the tongue piece 37 of the flange portion 36 is formed. The included inner height t 3 is formed to be slightly larger than the plate thickness t 2 of the press-fit portion 24 of the core metal 21.
A covering portion 38 of the cored bar 21 is formed by the flange portion 36 including the side surface portion 32, the annular portion 33, the groove portion 35, and the lip 37.

次に、上記のように構成したパルサーリング２０の組立手順及び外輪５への装着手順について説明する。
先ず、図４（ａ）に示すように、着磁ゴム３０の被覆部３８を、芯金２１の側面部２３及び圧入部２４に嵌合する。このとき、芯金２１の側面部２３は着磁ゴム３０の溝部３５に嵌入され、また、圧入部２４の先端部は円環部３３と舌片３７の間に挿入されて、その面取り部２５が舌片３７の傾斜面に圧着されて、着磁ゴム３０はその弾性により、側面部２３及び圧入部２４に密着して一体化される。このとき、舌片３７の内周面は、芯金２１の圧入部２４の内周面より僅かに中心部側に位置している。 Next, an assembly procedure of the pulsar ring 20 configured as described above and a mounting procedure to the outer ring 5 will be described.
First, as shown in FIG. 4A, the covering portion 38 of the magnetized rubber 30 is fitted into the side surface portion 23 and the press-fit portion 24 of the core metal 21. At this time, the side surface portion 23 of the core metal 21 is fitted into the groove portion 35 of the magnetized rubber 30, and the tip end portion of the press-fit portion 24 is inserted between the annular portion 33 and the tongue piece 37, and the chamfered portion 25. Is pressed onto the inclined surface of the tongue piece 37, and the magnetized rubber 30 is brought into close contact with and integrated with the side surface portion 23 and the press-fit portion 24 due to its elasticity. At this time, the inner peripheral surface of the tongue piece 37 is located slightly closer to the center than the inner peripheral surface of the press-fit portion 24 of the core metal 21.

このようにして組立てられたパルサーリング２０は、図４（ｂ）に示すように、芯金２１の圧入部２４を、インナ側から外輪５の外周に圧入し、固定する。このとき、着磁ゴム３０の溝部３５を形成する側壁３４は弾性変形して外輪５のインナ側端面に密着し、舌片３７は弾性変形して外輪５の外周面に密着するので、外輪５の芯金２１の間は水密にシールされる。   As shown in FIG. 4B, the pulsar ring 20 assembled in this manner presses and presses the press-fitting portion 24 of the cored bar 21 into the outer periphery of the outer ring 5 from the inner side. At this time, the side wall 34 forming the groove portion 35 of the magnetized rubber 30 is elastically deformed to be in close contact with the inner side end surface of the outer ring 5, and the tongue piece 37 is elastically deformed to be in close contact with the outer peripheral surface of the outer ring 5. The core metal 21 is sealed in a watertight manner.

上記のようにして、外輪５のインナ側にパルサーリング２０が装着されたホイール用軸受装置１は、内輪２が固定軸（図示せず）に固定され、外輪５のフランジ７に設けたボルト９にホイールが取付けられる。また、パルサーリング２０の着磁ゴム３０の円環部３３（パルサー部）に対向しかつ近接して、回転数検出センサ（図示せず）が設置される。
そして、ホイールが回転すると、これと一体化された外輪５及びパルサーリング２０が回転し、その回転は回転数検出センサで計測されて、外輪５、したがってホイールの回転数が検出される。 In the wheel bearing device 1 in which the pulsar ring 20 is mounted on the inner side of the outer ring 5 as described above, the inner ring 2 is fixed to a fixed shaft (not shown), and the bolt 9 provided on the flange 7 of the outer ring 5. A wheel can be attached to. In addition, a rotation speed detection sensor (not shown) is installed opposite to and in close proximity to the annular portion 33 (pulsar portion) of the magnetized rubber 30 of the pulsar ring 20.
When the wheel rotates, the outer ring 5 and the pulsar ring 20 integrated with the wheel rotate, and the rotation is measured by the rotation number detection sensor, and the rotation number of the outer ring 5 and therefore the wheel is detected.

このとき、ホイールの回転によって飛散した水がパルサーリング２０にかかるが、芯金２１と外輪５との間は、着磁ゴム３０に設けたシール部である側壁３４、溝部３５及び舌片３７により水密にシールされているため、芯金２１に水が浸入することがなく、このため錆が発生することもないので、着磁ゴム３０が芯金２１から剥離することもない。   At this time, water scattered by the rotation of the wheel is applied to the pulsar ring 20, but the space between the core metal 21 and the outer ring 5 is a side wall 34, a groove 35, and a tongue piece 37 which are seal portions provided on the magnetized rubber 30. Since it is sealed in a watertight manner, water does not enter the core metal 21, and therefore no rust is generated, so that the magnetized rubber 30 does not peel from the core metal 21.

図５は本実施の形態に係るパルサーリング２０の他の例を示すもので、（ａ）はパルサーリング２０の要部説明図、（ｂ）はこのパルサーリング２０を外輪５に装着した状態の説明図である。
本例は、図３の着磁ゴム３０の溝部３５を形成する側壁３４の外周側端部に、図５（ａ）に示すように、斜めアウタ側に突出するシール部であるリップ３９を設けたものである。
このように構成したことにより、パルサーリング２０を外輪５に圧入して装着すると、側壁３４及びリップ３９が弾性変形して外輪５のインナ側端面に密着するので、外輪５と芯金２１の間をより水密にシールすることができる。 5A and 5B show another example of the pulsar ring 20 according to the present embodiment. FIG. 5A is an explanatory view of a main part of the pulsar ring 20, and FIG. 5B is a state in which the pulsar ring 20 is attached to the outer ring 5. FIG. It is explanatory drawing.
In this example, as shown in FIG. 5A, a lip 39, which is a seal portion protruding obliquely toward the outer side, is provided at the outer peripheral end of the side wall 34 that forms the groove 35 of the magnetized rubber 30 shown in FIG. It is a thing.
With this configuration, when the pulsar ring 20 is press-fitted into the outer ring 5 and attached, the side wall 34 and the lip 39 are elastically deformed and are in close contact with the inner side end surface of the outer ring 5. Can be sealed more watertight.

本実施の形態によれば、ホイール用軸受装置１の外輪５のインナ側に設けたパルサーリング２０の鋼板からなる芯金２１を、シール部を備えた着磁ゴムにより水密に被覆したので、外輪５との接触部から芯金２１に水が浸入することがない。このため、芯金２１に錆が発生することがないので着磁ゴム３０が剥離することがなく、長期に亘って使用することのできる信頼性の高いパルサーリング２０を備えたホイール用軸受装置を得ることができる。   According to the present embodiment, the metal core 21 made of a steel plate of the pulsar ring 20 provided on the inner side of the outer ring 5 of the wheel bearing device 1 is water-tightly covered with the magnetized rubber having the seal portion. Water does not enter the cored bar 21 from the contact portion with 5. For this reason, since the rust does not occur in the metal core 21, the magnetized rubber 30 does not peel off, and the wheel bearing device provided with the reliable pulsar ring 20 that can be used for a long period of time is provided. Can be obtained.

［実施の形態２］
図６は本発明の実施の形態２に係るホイール用軸受装置のパルサーリングの要部説明図、及びこのパルサーリングを外輪に取付けた状態を示す説明図である。なお、実施の形態１と同じ部分にはこれと同じ符号を付し、説明を省略する。 [Embodiment 2]
FIG. 6 is an explanatory view showing a main part of a pulsar ring of a wheel bearing device according to Embodiment 2 of the present invention, and an explanatory view showing a state in which the pulsar ring is attached to an outer ring. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

本実施の形態は、芯金２１の圧入部２４の先端部側にその内径より若干大径の大径部２６を形成し、また、着磁ゴム３０の側面部３２の内周縁をアウタ側に折曲げて、そのアウタ側端部に斜め中心部側に突出するリップ４０を設けると共に、アウタ側の舌片３７を大きく形成してその内周面を膨出させ、膨出部３７ａを形成したものである。なお、円環部３３の内周面と舌片３７との間は、芯金２１の圧入部２４の先端部の板厚より僅かに狭く形成されている。
また、外輪５の外周面の着磁ゴム３０の舌片３７に対応する位置に、舌片３７の膨出部３７ａより若干浅い凹部５ａ（図６（ｂ））を設けたものである。 In the present embodiment, a large-diameter portion 26 slightly larger than the inner diameter is formed on the distal end side of the press-fit portion 24 of the core metal 21, and the inner peripheral edge of the side surface portion 32 of the magnetized rubber 30 is on the outer side. A lip 40 that protrudes toward the oblique central portion is provided at the outer side end portion, and the outer side tongue piece 37 is formed large to bulge its inner peripheral surface, thereby forming a bulging portion 37a. Is. It should be noted that the space between the inner peripheral surface of the annular portion 33 and the tongue piece 37 is formed slightly narrower than the thickness of the tip portion of the press-fit portion 24 of the core metal 21.
Further, a concave portion 5a (FIG. 6B) slightly shallower than the bulging portion 37a of the tongue piece 37 is provided at a position corresponding to the tongue piece 37 of the magnetized rubber 30 on the outer peripheral surface of the outer ring 5.

このように構成した着磁ゴム３０の被覆部３８を芯金２１に嵌合すると、図６（ａ）に示すように、側面部３２の内周側に設けたリップ４０は、芯金２１の側面部２３の内周側に位置し、かつその先端部は側面部２３のアウタ側の面よりアウタ側に位置する。また、舌片３７の外周面は、芯金２１の圧入部２４の大径部２６に圧着し、膨出部３７ａは圧入部２４の内周面から中心部側に突出している。   When the covering portion 38 of the magnetized rubber 30 configured as described above is fitted to the core metal 21, the lip 40 provided on the inner peripheral side of the side surface portion 32 is formed on the core metal 21 as shown in FIG. The side part 23 is located on the inner peripheral side, and the tip part is located on the outer side with respect to the outer side surface of the side part 23. Further, the outer peripheral surface of the tongue piece 37 is crimped to the large-diameter portion 26 of the press-fit portion 24 of the core metal 21, and the bulging portion 37 a protrudes from the inner peripheral surface of the press-fit portion 24 toward the center portion.

このようなパルサーリング２０の芯金２１を外輪５の外周にインナ側から圧入すると、図６（ｂ）に示すように、着磁ゴム３０のリップ４０は弾性変形して外輪５のインナ側端面に密着し、舌片３７は弾性変形してその膨出部３７ａが外輪５の凹部５ａに嵌入して密着し、外輪５と芯金２１との間を水密にシールする。
本実施の形態の作用、効果は、実施の形態１の場合とほぼ同様である。 When the metal core 21 of the pulsar ring 20 is press-fitted into the outer periphery of the outer ring 5 from the inner side, the lip 40 of the magnetized rubber 30 is elastically deformed as shown in FIG. The tongue piece 37 is elastically deformed, and the bulging portion 37a is fitted into the recessed portion 5a of the outer ring 5 to be in close contact with each other, so that the space between the outer ring 5 and the metal core 21 is sealed in a watertight manner.
The operation and effects of the present embodiment are almost the same as those of the first embodiment.

［実施の形態３］
図７は本発明の実施の形態３に係るホイール用軸受装置のパルサーリングの要部説明図、及びこのパルサーリングを外輪に取付けた状態を示す説明図である。なお、実施の形態１，２と同じ部分にはこれと同じ符号を付し、説明を省略する。 [Embodiment 3]
FIG. 7 is an explanatory view showing a main part of a pulsar ring of a wheel bearing device according to a third embodiment of the present invention, and an explanatory view showing a state in which the pulsar ring is attached to an outer ring. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, 2, and description is abbreviate | omitted.

本実施の形態は、芯金２１の側面部２３に続く圧入部２４のインナ側を、外周側にほぼ逆Ｕ字状に折曲げて折曲げ部２４ａを形成すると共に、着磁ゴム３０の円環部３３の内周面に、この折曲げ部２４ａに対応して凹部３３ａを設け、また、側面部２３のアウタ側に、実施の形態１の場合と同様に溝部３５を設けて、その側壁３４の外周側をアウタ側に折曲げて、芯金２１の折曲げ部２４ａの内周側の凹部に嵌入する嵌入部４１を設けたものである。なお、着磁ゴム３０のアウタ側には、実施の形態２の場合と同様に膨出部３７ａを有するリップ３７が設けられており、また、外輪５の外周面には、このリップ３７に対応して膨出部３７ａより浅い凹部５ａが設けられている。   In the present embodiment, the inner side of the press-fit portion 24 following the side surface portion 23 of the metal core 21 is bent into an approximately U shape on the outer peripheral side to form a bent portion 24a, and the circle of the magnetized rubber 30 A recess 33a is provided on the inner peripheral surface of the ring portion 33 corresponding to the bent portion 24a, and a groove portion 35 is provided on the outer side of the side surface portion 23 in the same manner as in the first embodiment. The outer peripheral side of 34 is bent to the outer side, and a fitting portion 41 is provided to be fitted into a concave portion on the inner peripheral side of the bent portion 24 a of the cored bar 21. Note that a lip 37 having a bulging portion 37 a is provided on the outer side of the magnetized rubber 30 as in the case of the second embodiment, and the outer peripheral surface of the outer ring 5 corresponds to the lip 37. Thus, a recess 5a shallower than the bulging portion 37a is provided.

このように構成した着磁ゴム３０の被覆部３８を芯金２１に嵌合すると、図７（ａ）に示すように、その凹部３３ａが芯金２１の折曲げ部２４ａに嵌合すると共に、溝部３５が側面部２３に嵌合して、嵌入部４１が折曲げ部２４ａの内周側の凹部に嵌入される。このとき、嵌入部４１の内周面は、芯金２１の圧入部２４の内周面から僅かに露出する。また、円環部３３と舌片３７との間には芯金２１の圧入部２４が挿入され、舌片３７の外周面が大径部２６に圧着される。   When the covering portion 38 of the magnetized rubber 30 configured as described above is fitted to the core metal 21, the recess 33a is fitted to the bent portion 24a of the core metal 21 as shown in FIG. The groove portion 35 is fitted into the side surface portion 23, and the fitting portion 41 is fitted into the concave portion on the inner peripheral side of the bent portion 24a. At this time, the inner peripheral surface of the fitting portion 41 is slightly exposed from the inner peripheral surface of the press-fit portion 24 of the core metal 21. Further, the press-fit portion 24 of the core metal 21 is inserted between the annular portion 33 and the tongue piece 37, and the outer peripheral surface of the tongue piece 37 is pressure-bonded to the large-diameter portion 26.

このようなパルサーリング２０の芯金２１を外輪５の外周にインナ側から圧入すると、図７（ｂ）に示すように、着磁ゴム３０の凹部３３ａが芯金２１の折曲げ部２４ａに、側壁３４及び嵌入部４１が弾性変形して外輪５のインナ側端面及び外周面にそれぞれ密着し、舌片３７は弾性変形してその膨出部３７ａが外輪５の凹部５ａに密着し、外輪５と芯金２１との間を水密にシールする。
本実施の形態の作用、効果は、実施の形態１の場合とほぼ同様である。 When the metal core 21 of the pulsar ring 20 is press-fitted into the outer periphery of the outer ring 5 from the inner side, the concave portion 33a of the magnetized rubber 30 is formed in the bent portion 24a of the metal core 21, as shown in FIG. The side wall 34 and the fitting portion 41 are elastically deformed to be in close contact with the inner side end surface and the outer peripheral surface of the outer ring 5, and the tongue piece 37 is elastically deformed to have its bulged portion 37 a closely contact with the recess 5 a of the outer ring 5. And the metal core 21 are sealed in a watertight manner.
The operation and effects of the present embodiment are almost the same as those of the first embodiment.

上記の説明では、着磁ゴム３０の円環部３３の外周面に、Ｓ極とＮ極を交互に設けてパルサー部を形成した場合を示したが、着磁ゴム３０の側面部３２のインナ側面部の周方向に、Ｓ極とＮ極を交互に設けてパルサー部を形成してもよい。
また、図示のホイール用軸受装置１に本発明に係るパルサーリング２０を設けた場合を示したが、これに限定するものではなく、例えば、転動体１０に円錐ころを用いるなど、他の構造のホイール用軸受装置にも本発明を実施することができる。 In the above description, the case where the pulsar portion is formed by alternately providing the south pole and the north pole on the outer peripheral surface of the annular portion 33 of the magnetized rubber 30 is shown. The pulsar part may be formed by alternately providing the S pole and the N pole in the circumferential direction of the side face part.
Moreover, although the case where the pulsar ring 20 which concerns on this invention was provided in the wheel bearing apparatus 1 of illustration was shown, it is not limited to this, For example, a tapered roller is used for the rolling element 10, for example of another structure. The present invention can also be implemented in a wheel bearing device.

本発明の実施の形態１に係るホイール用軸受装置の縦断面図である。It is a longitudinal cross-sectional view of the wheel bearing apparatus which concerns on Embodiment 1 of this invention. 図１のパルサーリングを構成する芯金の平面図及びそのＡ−Ａ断面図である。It is the top view of the metal core which comprises the pulsar ring of FIG. 1, and its AA sectional drawing. 図１のパルサーリングを構成する着磁ゴムの平面図及びそのＢ−Ｂ断面図である。It is the top view of the magnetized rubber which comprises the pulsar ring of FIG. 1, and its BB sectional drawing. 図１のパルサーリングの組立手順及び外輪への装着手順の説明図である。It is explanatory drawing of the assembly procedure of the pulsar ring of FIG. 1, and the attachment procedure to an outer ring | wheel. 実施の形態１のパルサーリングの他の例の要部説明図及び外輪への装着状態を示す説明図である。It is principal part explanatory drawing of the other example of the pulsar ring of Embodiment 1, and explanatory drawing which shows the mounting state to an outer ring | wheel. 本発明の実施の形態２に係るホイール用軸受装置のパルサーリングの要部説明図及び外輪への装着状態を示す説明図である。It is principal part explanatory drawing of the pulsar ring of the wheel bearing apparatus which concerns on Embodiment 2 of this invention, and explanatory drawing which shows the mounting state to an outer ring | wheel. 本発明の実施の形態３に係るホイール用軸受装置のパルサーリングの要部説明図及び外輪への装着状態を示す説明図である。It is principal part explanatory drawing of the pulsar ring of the wheel bearing apparatus which concerns on Embodiment 3 of this invention, and explanatory drawing which shows the mounting state to an outer ring | wheel.

符号の説明Explanation of symbols

１ ホイール用軸受装置、２ 内輪、５ 外輪、５ａ 凹部、１０ 転動体、２０ パルサーリング、２１ 芯金、２３ 側面部、２４ 圧入部、２４ａ 折曲げ部、２５ 面取り部、２６ 大径部、３０ 着磁ゴム、３２ 側面部、３３ 円環部、３４ 側壁、３５ 溝部、３６ フランジ、３７ 舌片、３７ａ 膨出部、３８ 嵌入部、３９，４０ リップ、４１ 嵌入部。   DESCRIPTION OF SYMBOLS 1 Wheel bearing device, 2 Inner ring, 5 Outer ring, 5a Recessed part, 10 Rolling body, 20 Pulsar ring, 21 Core metal, 23 Side part, 24 Press-fit part, 24a Bending part, 25 Chamfer part, 26 Large diameter part, 30 Magnetized rubber, 32 side face part, 33 ring part, 34 side wall, 35 groove part, 36 flange, 37 tongue piece, 37a bulge part, 38 fitting part, 39, 40 lip, 41 fitting part.

Claims (3)

内輪、外輪、これら内輪と外輪の間に配設された転動体、及び前記外輪の端部外周縁に装着されたパルサーリングを有するホイール用軸受装置において、
前記パルサーリングを、中心穴を有する側面部及び該側面部の外周が軸方向の内側に折曲げられた圧入部からなり、該圧入部が前記外輪の外周面に圧入される鋼板製の芯金と、中心穴を有する側面部及び該側面部の外周側が軸方向の内側に折曲げられた円環部からなり、該円環部の外周面又は前記側面部の表面にパルサー部が形成されて前記芯金の外面を覆う着磁ゴムとによって構成し、
前記着磁ゴムに、前記パルサーリングを外輪の外周面に圧入したときに、前記外輪と芯金の軸方向両端部をシールするシール手段を設け、
前記芯金の圧入部の外周面側の外周側にほぼ逆Ｕ字状の折曲げ部を設けると共に、該圧入部の軸方向側内周面に大径部を設け、前記着磁ゴムに、前記芯金の折曲げ部に対応して凹部を設けると共に、外周面側に設けた溝部の側壁の外周側に前記芯金の折曲げ部の凹部に嵌入する嵌入部を設け、軸方向側の内周に設けられて外周面が前記芯金の大径部に嵌合し内周面に膨出部が形成された舌片からなるシール手段を設けたことを特徴とするホイール用軸受装置。 In an inner ring, an outer ring, a rolling element disposed between the inner ring and the outer ring, and a wheel bearing device having a pulsar ring mounted on the outer peripheral edge of the outer ring,
The pulsar ring comprises a side wall portion having a center hole and a press-fit portion in which the outer periphery of the side surface portion is bent inward in the axial direction, and the press-fit portion is press-fitted into the outer peripheral surface of the outer ring. And a side surface portion having a center hole and an annular portion in which the outer peripheral side of the side surface portion is bent inward in the axial direction, and a pulsar portion is formed on the outer peripheral surface of the annular portion or the surface of the side surface portion. It is composed of magnetized rubber that covers the outer surface of the cored bar,
When the pulsar ring is press-fitted into the outer peripheral surface of the outer ring, the sealing rubber is provided with sealing means for sealing the axial ends of the outer ring and the cored bar .
While providing a substantially inverted U-shaped bent portion on the outer peripheral side of the outer peripheral surface side of the press-fitting portion of the metal core, providing a large diameter portion on the inner peripheral surface in the axial direction of the press-fitting portion, A concave portion is provided corresponding to the bent portion of the core metal, and a fitting portion is provided on the outer peripheral side of the side wall of the groove portion provided on the outer peripheral surface side to be fitted into the concave portion of the bent portion of the core metal. A wheel bearing device comprising a sealing means comprising a tongue piece provided on an inner periphery and having an outer peripheral surface fitted into a large diameter portion of the cored bar and having a bulging portion formed on the inner peripheral surface . 前記着磁ゴムのシール手段を、該着磁ゴムの外周面側に設けられて前記芯金の側面部が挿入される溝部、該溝部の軸方向側の側壁、及び軸方向側に設けた舌片によって構成したことを特徴とする請求項１記載のホイール用軸受装置。   The magnetized rubber sealing means includes a groove portion provided on the outer peripheral surface side of the magnetized rubber and into which the side surface portion of the core metal is inserted, an axial side wall of the groove portion, and a tongue provided on the axial side. The wheel bearing device according to claim 1, comprising a piece. 前記着磁ゴムのシール手段を、該着磁ゴムの側面部内周側において軸方向側に斜め下方に延設されたリップと、軸方向側の内周に設けられて内周面に膨出部が形成された舌片とによって構成したことを特徴とする請求項１記載のホイール用軸受装置。   The magnetized rubber sealing means includes a lip extending obliquely downward in the axial direction on the inner peripheral side of the side surface of the magnetized rubber, and a bulging portion provided on the inner peripheral surface on the axial side. The wheel bearing device according to claim 1, wherein the wheel bearing device is configured by a tongue piece formed with a tongue.
JP2007189273A 2007-07-20 2007-07-20 Wheel bearing device Expired - Fee Related JP5145801B2 (en)

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JP2007189273A JP5145801B2 (en) 2007-07-20 2007-07-20 Wheel bearing device
PCT/JP2008/062905 WO2009014059A1 (en) 2007-07-20 2008-07-17 Bearing for wheel

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