JP2013142419A - Protective cover and vehicular rolling bearing device mounted with the same - Google Patents

Protective cover and vehicular rolling bearing device mounted with the same Download PDF

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JP2013142419A
JP2013142419A JP2012001901A JP2012001901A JP2013142419A JP 2013142419 A JP2013142419 A JP 2013142419A JP 2012001901 A JP2012001901 A JP 2012001901A JP 2012001901 A JP2012001901 A JP 2012001901A JP 2013142419 A JP2013142419 A JP 2013142419A
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ring member
protective cover
inner ring
vehicle
rolling bearing
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Japanese (ja)
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Kenji Urushikawa
賢治 漆川
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JTEKT Corp
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JTEKT 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
    • F16C41/04—Preventing damage to bearings during storage or transport thereof or when otherwise out of use
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To retain a protective cover for covering and protecting a magnetic encoder portion of a vehicular rolling bearing device.SOLUTION: The protective cover 20 includes: a first annular portion 21 which covers the magnetic encoder portion 16; a first cylindrical portion 22 which is extended from an inner diameter end 21a of the first annular portion 21 and fitted into an inner periphery 11d of an inner ring member 11; and a retention portion 23 which retains the protective cover 20 by being formed at an axial end 22a opposite to the arrangement side of the first annular portion 21 in the first cylindrical portion 22 so as to extend from the inner periphery 11d of the inner ring member 11 to the vehicle inner-side end surface 11a and opposite vehicle outer-side end surface 11c of the inner ring member 11. The retention portion 23 is bent to the radially outside beyond the first cylindrical portion 22, and is elastically deformable in the radial direction.

Description

この発明は保護カバー及びこの保護カバーを有する車両用転がり軸受装置に関する。   The present invention relates to a protective cover and a rolling bearing device for a vehicle having the protective cover.

従来、車両の車体側部材に固定される外輪部材と、前記外輪部材と同芯であり、且つ前記外輪部材の径方向内方側に配置され、内周面にシャフトが挿通される内輪部材と、前記外輪部材と前記内輪部材との間に介装される転動体と、前記内輪部材のうち前記車体側部材に対向する第１の軸方向端面側（車両インナー側）の前記内輪部材の外周面に配置される円環状の磁気エンコーダー部と、を備える車両用転がり軸受装置が知られている。   Conventionally, an outer ring member that is fixed to a vehicle body side member of a vehicle, an inner ring member that is concentric with the outer ring member, is disposed on the radially inner side of the outer ring member, and has a shaft inserted through an inner peripheral surface thereof. A rolling element interposed between the outer ring member and the inner ring member, and an outer periphery of the inner ring member on the first axial end face side (vehicle inner side) of the inner ring member facing the vehicle body side member. 2. Description of the Related Art A rolling bearing device for a vehicle including an annular magnetic encoder unit disposed on a surface is known.

車両用転がり軸受装置が備える磁気エンコーダー部は、車輪の回転速度を検出する回転検出装置として用いられるものである。外輪部材の車両インナー側には、環状カバー体に保持されるセンサーが設けられる。そして、車輪の回転に伴い回転する磁気エンコーダー部の回転変化をセンサーによって検出することで車輪の回転速度を検出する。
ここで、車両用転がり軸受装置が備える磁気エンコーダー部は、磁力を有しているため車両に取付けるまでの間に露出した状態が持続されると、その着磁面に鉄粉等の異物の付着が誘発されて着磁特性悪化の原因となる。そこで、特許文献１に開示されるような車両用転がり軸受装置の保護カバーが知られている。 A magnetic encoder unit included in a rolling bearing device for a vehicle is used as a rotation detection device that detects the rotation speed of a wheel. A sensor held by the annular cover body is provided on the vehicle inner side of the outer ring member. And the rotation speed of a wheel is detected by detecting the rotation change of the magnetic encoder part rotated with rotation of a wheel with a sensor.
Here, since the magnetic encoder unit included in the rolling bearing device for a vehicle has a magnetic force and is exposed until it is attached to the vehicle, foreign matter such as iron powder adheres to the magnetized surface. Is induced, which causes deterioration of magnetization characteristics. Therefore, a protective cover for a rolling bearing device for a vehicle as disclosed in Patent Document 1 is known.

特許文献１の図３に示すように保護カバーは、合成樹脂で形成されており磁気エンコーダー部を軸方向から覆う円環状の円板部と、この円板部から軸方向に延出して軸受の内周壁に嵌り込む円筒部を有している。この円筒部の外周面には、車両用転がり軸受装置に嵌り込んだ状態を保持するため径方向外方に向かって突出する突条が形成される。この突条が軸受の内周壁を押圧することで摩擦力を生じさせ、保護カバーを車両用転がり軸受装置に嵌り込んだ状態で保持する。   As shown in FIG. 3 of Patent Document 1, the protective cover is formed of a synthetic resin and has an annular disc portion that covers the magnetic encoder portion from the axial direction, and extends from the disc portion in the axial direction to the bearing. It has a cylindrical portion that fits into the inner peripheral wall. On the outer peripheral surface of the cylindrical portion, a ridge that protrudes outward in the radial direction is formed in order to maintain the state of being fitted into the rolling bearing device for a vehicle. This protrusion presses the inner peripheral wall of the bearing to generate a frictional force, and the protective cover is held in a state of being fitted into the rolling bearing device for a vehicle.

特開２００９−７３４７３号公報JP 2009-73473 A

しかしながら、合成樹脂は、その特性として荷重がかかった状態が継続されると時間の経過とともに形状の変形が進行していくといったクリープ現象が知られている。すなわち、合成樹脂は、長期間の荷重負荷があるとその応力にみあった歪み（変形量）が永久歪みとして残った一種の「へたり」を生ずる。そのため、保護カバーは、嵌め込んだ状態が長く続いて突条が変形して保護カバーを取り付けた当初の保持力を失って車両用転がり軸受装置から抜け落ちてしまうおそれがある。そうすると、磁気エンコーダー部の着磁面の保護ができないおそれがある。   However, the synthetic resin is known to have a creep phenomenon in which the shape of the synthetic resin progresses as time passes if a state where a load is applied is continued. That is, when a synthetic resin is subjected to a load for a long period of time, a strain (deformation amount) corresponding to the stress is generated as a kind of “sagging” that remains as a permanent strain. Therefore, the protective cover may be fitted for a long time, and the protrusions may be deformed to lose the initial holding force to which the protective cover is attached and fall off the rolling bearing device for a vehicle. If it does so, there exists a possibility that the magnetization surface of a magnetic encoder part cannot be protected.

而して、本発明は、このような点に鑑みて創案されたものであり、本発明が解決しようとする課題は、車両用転がり軸受装置の磁気エンコーダー部を覆って保護する保護カバーの抜け止めを図ることにある。   Thus, the present invention has been devised in view of these points, and the problem to be solved by the present invention is to remove a protective cover that covers and protects the magnetic encoder portion of the rolling bearing device for a vehicle. The goal is to stop.

上記課題を解決するために、本発明の保護カバーは次の手段をとる。
先ず、第１の発明に係る保護カバーは、車両の車体側部材に固定される外輪部材と、前記外輪部材と同芯であり、且つ前記外輪部材の径方向内方側に配置されて内周面にシャフトが挿通される内輪部材と、前記外輪部材と前記内輪部材との間に介装される転動体と、前記内輪部材のうち前記車体側部材に対向する第１の軸方向端面側の前記内輪部材の外周面に配置される円環状の磁気エンコーダー部と、を備える車両用転がり軸受装置において前記磁気エンコーダー部を覆って保護する保護カバーであって、前記保護カバーには、前記磁気エンコーダー部を覆う円環部と、前記円環部の内径端部から延出して前記内輪部材の内周面に嵌り込む円筒部と、前記円筒部のうち前記円環部の配設側と反対の軸方向端部には、前記内輪部材の内周面から前記内輪部材の第１の軸方向端面と反対の第２の軸方向端面にわたって形成されることで保護カバーを抜け止めする抜止部を有しており、前記抜止部は、前記円筒部より径方向外方側に折り曲げられるとともに、径方向に弾性変形可能であることを特徴とする。 In order to solve the above problems, the protective cover of the present invention takes the following means.
First, a protective cover according to a first aspect of the present invention is an outer ring member fixed to a vehicle body side member of a vehicle, is concentric with the outer ring member, and is disposed on an inner side in the radial direction of the outer ring member. An inner ring member through which a shaft is inserted, a rolling element interposed between the outer ring member and the inner ring member, and a first axial end face side of the inner ring member facing the vehicle body side member. An annular magnetic encoder portion disposed on an outer peripheral surface of the inner ring member, and a protective cover that covers and protects the magnetic encoder portion in a rolling bearing device for a vehicle, and the protective encoder includes the magnetic encoder An annular portion that covers the annular portion, a cylindrical portion that extends from the inner diameter end of the annular portion and fits into the inner peripheral surface of the inner ring member, and of the cylindrical portion that is opposite to the arrangement side of the annular portion At the axial end, the inner peripheral surface of the inner ring member The inner ring member has a retaining portion that is formed over the second axial end surface opposite to the first axial end surface to prevent the protective cover from being removed, and the retaining portion is more radial than the cylindrical portion. It is bent outward and is elastically deformable in the radial direction.

この第１の発明によれば、保護カバーは、磁気エンコーダー部を覆う円環部によって磁気エンコーダー部の着磁面を保護する。円筒部は、円環部の内径端部から延出して内輪部材の内周面に嵌り込む。これにより、内輪部材の内周面を保護すると共に、保護カバーを嵌め込む際の位置決めが容易となる。
更に、円筒部に設けられる抜止部は、円環部の配設側と反対の軸方向端部に設けられ、内輪部材の内周面から前記内輪部材の第１の軸方向端面と反対の第２の軸方向端面にわたって形成される。保護カバーは、内輪部材の第２の軸方向端面に引っかかることで嵌め込み状態を保持する構成であることから、クリープ現象に伴う保護カバーの抜け止めを防ぐことができる。また、抜止部は、径方向に弾性変形可能であるため、脱着が容易である。 According to the first aspect of the invention, the protective cover protects the magnetized surface of the magnetic encoder part by the annular part that covers the magnetic encoder part. The cylindrical portion extends from the inner diameter end of the annular portion and fits into the inner peripheral surface of the inner ring member. Thereby, while protecting the inner peripheral surface of an inner ring member, positioning at the time of fitting a protective cover becomes easy.
Further, the retaining portion provided in the cylindrical portion is provided at an axial end opposite to the arrangement side of the annular portion, and from the inner peripheral surface of the inner ring member to a first end opposite to the first axial end surface of the inner ring member. Two axial end faces. Since the protective cover is configured to hold the fitted state by being caught on the second axial end surface of the inner ring member, it is possible to prevent the protective cover from being detached due to a creep phenomenon. Moreover, since the retaining portion can be elastically deformed in the radial direction, it can be easily detached.

次に、第２の発明に係る保護カバーは、前記円筒部のうち前記円環部の配設側と反対の軸方向端部には、更に前記円筒部より径方向内方側に折り曲げられる折曲部を有していることを特徴とする。   Next, a protective cover according to a second aspect of the present invention is a folding method in which an axial end opposite to the arrangement side of the annular portion is further bent radially inward from the cylindrical portion. It has a curved part.

この第２の発明によれば、折曲部の構成を有することで、車両用転がり軸受装置を車両に取付ける際に、保護カバーを外し忘れたとしても内輪部材にシャフトを挿通すると、折曲部がシャフトに押されて外れる構成となる。そのため、保護カバーの外し忘れを防ぐことができる。また、保護カバーは、車両に取付けるまでの間に使用するものであることから、材料コストを鑑みれば、保形性を満たす範囲内で極力肉薄に形成したい。ここで、折曲部は、第２の軸方向端面において径方向内方側に折り曲げられるため、円筒部の補強としての役割も果たし保護カバー全体の剛性向上を図ることができる。これにより、材料コストを抑制しつつ保形性を維持する保護カバーとし得る。   According to the second aspect of the present invention, when the rolling bearing device for a vehicle is attached to the vehicle, the bent portion is inserted into the inner ring member even if the protective cover is forgotten. Is configured to be released by being pushed by the shaft. Therefore, forgetting to remove the protective cover can be prevented. In addition, since the protective cover is used until it is attached to the vehicle, it is desired to form it as thin as possible within the range that satisfies the shape retaining property in view of the material cost. Here, since the bent portion is bent radially inward at the second axial end surface, it also serves as a reinforcement of the cylindrical portion, and the overall rigidity of the protective cover can be improved. Thereby, it can be set as the protective cover which maintains shape retention property, suppressing material cost.

次に、第３の発明に係る保護カバーを装着する車両用転がり軸受装置は、車両の車体側部材に固定される外輪部材と、前記外輪部材と同芯であり、且つ前記外輪部材の径方向内方側に配置され、内周面にシャフトが挿通される内輪部材と、前記外輪部材と前記内輪部材との間に介装される転動体と、前記内輪部材のうち前記車体側部材に対向する第１の軸方向端面側の前記内輪部材の外周面に圧入される円環状の磁気エンコーダー部と、を備える車両用転がり軸受装置であって、前記第１の発明または第２の発明に記載の保護カバーを装着することを特徴とする。   Next, a rolling bearing device for a vehicle to which a protective cover according to a third aspect of the invention is mounted is an outer ring member fixed to a vehicle body side member of the vehicle, a concentric structure with the outer ring member, and a radial direction of the outer ring member. An inner ring member disposed on the inner side and having a shaft inserted through an inner peripheral surface thereof, a rolling element interposed between the outer ring member and the inner ring member, and facing the vehicle body side member of the inner ring member A rolling bearing device for a vehicle, comprising: an annular magnetic encoder portion that is press-fitted into the outer peripheral surface of the inner ring member on the first axial end surface side, and is described in the first invention or the second invention. A protective cover is attached.

この第３の発明によれば、保護カバーによって磁気エンコーダー部を好適に保護される車両用転がり軸受装置とすることができる。   According to this 3rd invention, it can be set as the rolling bearing device for vehicles which protects a magnetic encoder part suitably by a protective cover.

本発明は上記各発明の手段をとることにより、車両用転がり軸受装置の磁気エンコーダー部を覆って保護する保護カバーの抜け止めを図ることができる。   According to the present invention, by taking the measures of the respective inventions described above, it is possible to prevent the protective cover that covers and protects the magnetic encoder portion of the rolling bearing device for a vehicle from being removed.

車両における車軸懸架式における後輪懸架装置を示す概要図である。It is a schematic diagram showing a rear wheel suspension device in an axle suspension type in a vehicle. 後輪懸架装置における車両用転がり軸受装置をリヤアクスルシャフトに組み付けた状態を示す断面図である。It is sectional drawing which shows the state which assembled | attached the rolling bearing device for vehicles in a rear-wheel suspension apparatus to the rear axle shaft. 本発明の実施形態に係る保護カバーを車両用転がり軸受装置に装着した状態を断面図である。It is sectional drawing in the state which mounted | wore the rolling bearing device for vehicles with the protective cover which concerns on embodiment of this invention. 本発明の実施形態に係る保護カバーを車両用転がり軸受装置に装着した状態を示す斜視図である。It is a perspective view which shows the state which mounted | wore the vehicle rolling bearing apparatus with the protective cover which concerns on embodiment of this invention. 本発明の実施形態に係る保護カバーを下方側から示す斜視図である。It is a perspective view which shows the protective cover which concerns on embodiment of this invention from the downward side.

以下に、本発明を実施するための実施形態について、図１〜図５を用いて説明する。
なお、以下の説明において、車両インナー側とは図２、３における左側を示し、車両アウター側とは図２、３における右側を示すものとする。 Embodiments for carrying out the present invention will be described below with reference to FIGS.
In the following description, the vehicle inner side indicates the left side in FIGS. 2 and 3, and the vehicle outer side indicates the right side in FIGS.

車両用転がり軸受装置１０は、図１に示すように車軸懸架式における後輪懸架装置Ｃに使用される。車両用転がり軸受装置１０は、図２に示すように、例えば複列外向きアンギュラ玉軸受で構成されている。シャフトとしてのリヤアクスルシャフトＡに対しその軸方向に挿通され、圧入外嵌される内輪部材１１と、この内輪部材１１と同芯に配置された外輪部材１２と、この内輪部材１１と外輪部材１２との間に介装される転動体１３とを有している。外輪部材１２の車両インナー側の端部１２ａにおける外周側には、図１、４に示すように、アクスルハウジングとしてのリヤアクスルハウジングＥ（車両の車体側部材）に固定するためのフランジ１２ｂが一体形成される。このフランジ１２ｂには、ボルトを挿通させるボルト挿通孔１４が形成され、ボルトを介してリヤアクスルハウジングＥ（図１参照）に固定される。   The rolling bearing device 10 for vehicles is used for the rear-wheel suspension apparatus C in an axle suspension type, as shown in FIG. As shown in FIG. 2, the rolling bearing device 10 for vehicles is comprised, for example by the double row outward angular ball bearing. An inner ring member 11 inserted in the axial direction of the rear axle shaft A as a shaft and press-fitted and fitted, an outer ring member 12 disposed concentrically with the inner ring member 11, the inner ring member 11 and the outer ring member 12, And a rolling element 13 interposed therebetween. As shown in FIGS. 1 and 4, a flange 12b for fixing to a rear axle housing E (vehicle body side member of the vehicle) as an axle housing is integrally formed on the outer peripheral side of the outer ring member 12 at the end 12a on the vehicle inner side. Is done. A bolt insertion hole 14 through which a bolt is inserted is formed in the flange 12b, and is fixed to the rear axle housing E (see FIG. 1) via the bolt.

リヤアクスルシャフトＡの車両アウター側には、図２に示すように車両用転がり軸受装置１０の内輪部材１１を当接させて位置決めするための段部Ａ１が形成される。この段部Ａ１に連続する車両インナー側には、車両用転がり軸受装置１０の内輪部材１１が圧入外嵌される圧入軸部Ａ２が形成されている。この圧入軸部Ａ２は車両用転がり軸受装置１０の内輪部材１１と、後述する車両用転がり軸受装置１０を固定するためのスペーサＦ１やリテーナリングＦ２等の周辺部品が圧入外嵌される程度の軸長を有している。   On the vehicle outer side of the rear axle shaft A, as shown in FIG. 2, a step portion A1 is formed for abutting and positioning the inner ring member 11 of the rolling bearing device 10 for the vehicle. A press-fit shaft portion A2 into which the inner ring member 11 of the rolling bearing device 10 for a vehicle is press-fitted and fitted is formed on the vehicle inner side continuous with the step portion A1. This press-fit shaft portion A2 is a shaft to which the inner ring member 11 of the vehicle rolling bearing device 10 and peripheral parts such as a spacer F1 and a retainer ring F2 for fixing the vehicle rolling bearing device 10 described later are press-fitted and fitted. Have a length.

車両用転がり軸受装置１０の車両インナー側の端部側には、図２、３に示すように凹部１５が形成される。この凹部１５は、外輪部材１２の車両インナー側の端部１２ａを、内輪部材１１の車両インナー側端面１１ａ（第１の軸方向端面）よりも車両インナー側に突出させることによって形成されている。   As shown in FIGS. 2 and 3, a concave portion 15 is formed on the end side of the vehicle rolling bearing device 10 on the vehicle inner side. The concave portion 15 is formed by projecting the end portion 12 a on the inner side of the outer ring member 12 toward the inner side of the vehicle from the inner end surface 11 a (first axial end surface) of the inner ring member 11.

図２、３に示すように車両用転がり軸受装置１０の内輪部材１１のうち、リヤアクスルハウジングＥ（車体側部材）に対向する内輪部材１１の外周面１１ｂ（換言すれば、凹部１５の底部１５ａ側に位置する内輪部材１１における外周面１１ｂ）には、円環状の磁気エンコーダー部１６が装着固定される。この磁気エンコーダー部１６は異なる極性の磁極（Ｎ極，Ｓ極）が周方向に交互並んで形成される。磁気エンコーダー部１６は内輪部材１１に固定された状態で、内輪部材１１の車両インナー側端面１１ａから若干車両インナー側へ突出する程度の厚みで形成されている。   As shown in FIGS. 2 and 3, of the inner ring member 11 of the rolling bearing device 10 for a vehicle, the outer peripheral surface 11 b (in other words, the bottom 15 a side of the recess 15) of the inner ring member 11 facing the rear axle housing E (vehicle body side member). An annular magnetic encoder portion 16 is attached and fixed to the outer peripheral surface 11b) of the inner ring member 11 located at the position. The magnetic encoder section 16 is formed by alternately arranging magnetic poles (N pole, S pole) of different polarities in the circumferential direction. The magnetic encoder portion 16 is formed with a thickness that protrudes slightly toward the vehicle inner side from the vehicle inner side end surface 11a of the inner ring member 11 in a state of being fixed to the inner ring member 11.

磁気エンコーダー部１６の回転による磁気変化を検出するためのセンサー１７は、図２に示すように外輪部材１２のフランジ１２ｂに装着される。このフランジ１２ｂに形成されるセンサ挿入孔１２ｃ内に外部からセンサー１７が挿入されている。挿入されるセンサー１７は、その先端が磁気エンコーダー部１６に近接されて配設されることによって、磁気変化を検出するすることで車輪の回転速度を検出する。   A sensor 17 for detecting a magnetic change due to the rotation of the magnetic encoder unit 16 is mounted on the flange 12b of the outer ring member 12, as shown in FIG. A sensor 17 is inserted from the outside into a sensor insertion hole 12c formed in the flange 12b. The sensor 17 to be inserted has its tip disposed close to the magnetic encoder unit 16 to detect the magnetic change, thereby detecting the rotational speed of the wheel.

次に、保護カバー２０について説明する。
保護カバー２０は、図３に示されるように車両用転がり軸受装置１０に使用され、この車両用転がり軸受装置１０の凹部１５の底部１５ａ側に装着される円環状の磁気エンコーダー部１６を保護するためのものである。保護カバー２０は、合成樹脂で形成される。この保護カバー２０は、図３に示すように車両用転がり軸受装置１０の凹部１５における底部１５ａ側に位置する磁気エンコーダー部１６を覆う円環状の第１円環部２１（円環部）が形成される。この第１円環部２１の内径端部２１ａの径寸法は、内輪部材１１の内周面１１ｄにおける内径寸法と略同一であるような寸法に設定されている。そして、内径端部２１ａから延出して内輪部材１１の内周面１１ｄに嵌り込む第１円筒部２２（円筒部）が形成される。
第１円筒部２２のうち第１円環部２１の配設側と反対の軸方向端部２２ａには、保護カバー２０を抜け止めする抜止部２３が形成される。
この抜止部２３は、内輪部材１１の内周面１１ｄから内輪部材１１の車両インナー側端面１１ａ（第１の軸方向端面）と反対の車両アウター側端面１１ｃ（第２の軸方向端面）にわたって形成されており、第１円筒部２２より径方向外方側に折り曲げられる爪状の部材である。また、抜止部２３は、径方向に弾性変形可能に構成される。抜止部２３は、少なくとも周方向に２つ構成されている。
また、第１円筒部２２のうち第１円環部２１の配設側と反対の軸方向端部２２ａには、抜止部２３のほかに、第１円筒部２２より径方向内方側に折り曲げられる折曲部２４が形成される。 Next, the protective cover 20 will be described.
As shown in FIG. 3, the protective cover 20 is used in the rolling bearing device 10 for a vehicle, and protects the annular magnetic encoder portion 16 mounted on the bottom 15 a side of the recess 15 of the rolling bearing device 10 for the vehicle. Is for. The protective cover 20 is formed of a synthetic resin. As shown in FIG. 3, the protective cover 20 is formed with an annular first annular portion 21 (annular portion) that covers the magnetic encoder portion 16 located on the bottom 15 a side of the concave portion 15 of the rolling bearing device 10 for a vehicle. Is done. The diameter of the inner diameter end 21 a of the first annular portion 21 is set to be substantially the same as the inner diameter of the inner peripheral surface 11 d of the inner ring member 11. And the 1st cylindrical part 22 (cylindrical part) extended from the internal diameter edge part 21a and fitting in the internal peripheral surface 11d of the inner ring member 11 is formed.
A retaining portion 23 that prevents the protective cover 20 from coming off is formed at an axial end 22 a opposite to the side where the first annular portion 21 is disposed in the first cylindrical portion 22.
The retaining portion 23 extends from the inner peripheral surface 11d of the inner ring member 11 to the vehicle outer side end face 11c (second axial end face) opposite to the vehicle inner side end face 11a (first axial end face) of the inner ring member 11. It is a claw-like member that is bent radially outward from the first cylindrical portion 22. The retaining portion 23 is configured to be elastically deformable in the radial direction. There are at least two retaining portions 23 in the circumferential direction.
Further, in addition to the retaining portion 23, the axial end portion 22 a opposite to the arrangement side of the first annular portion 21 of the first cylindrical portion 22 is bent radially inward from the first cylindrical portion 22. The bent portion 24 is formed.

さらに保護カバー２０は、図３〜５に示すように第１円環部２１から第２円筒部２５が連続形成される。第２円筒部２５は、第１円環部２１の外径端部２１ｂからリヤアクスルシャフトＡの軸方向に延び、車両用転がり軸受装置１０の凹部１５の内周壁１５ｂ（フランジ１２ｂ内）に嵌り込むように連続形成される。この第２円筒部２５は、その軸方向端部２５ａから径方向外方側に延出し、外輪部材１２の車両インナー側の端部１２ａの一部を覆う第２円環部２６が形成される。
また保護カバー２０は、第２円環部２６から延出した把持部２８が形成される。把持部２８は、第２円環部２６から径方向外方に延出し、フランジ１２ｂの外周に回り込んで形成される。また保護カバー２０は、第２円環部２６から延出してセンサ挿入孔１２ｃを覆う孔部被覆片２９が形成される。孔部被覆片２９は、フランジ１２ｂのセンサ挿入孔１２ｃの配設位置に対応する部位における第２円環部２６からさらに径方向外方に延出し、フランジ１２ｂの外周のセンサ挿入孔１２ｃを覆うよう形成される。 Further, as shown in FIGS. 3 to 5, the protective cover 20 includes a first annular portion 21 to a second cylindrical portion 25 that are continuously formed. The second cylindrical portion 25 extends from the outer diameter end portion 21b of the first annular portion 21 in the axial direction of the rear axle shaft A, and is fitted into the inner peripheral wall 15b (inside the flange 12b) of the concave portion 15 of the rolling bearing device 10 for a vehicle. Is formed continuously. The second cylindrical portion 25 is formed with a second annular portion 26 that extends radially outward from the axial end portion 25a and covers a part of the end portion 12a on the vehicle inner side of the outer ring member 12. .
The protective cover 20 is formed with a grip portion 28 extending from the second annular portion 26. The grip portion 28 extends radially outward from the second annular portion 26 and is formed around the outer periphery of the flange 12b. The protective cover 20 is formed with a hole covering piece 29 extending from the second annular portion 26 and covering the sensor insertion hole 12c. The hole covering piece 29 further extends radially outward from the second annular portion 26 at a position corresponding to the position where the sensor insertion hole 12c of the flange 12b is disposed, and covers the sensor insertion hole 12c on the outer periphery of the flange 12b. Formed.

このように、実施形態の保護カバー２０は、磁気エンコーダー部１６を覆う第１円環部２１によって磁気エンコーダー部１６の着磁面を保護する。第１円筒部２２は、第１円環部２１の内径端部２１ａから延出して内輪部材１１の内周面１１ｄに嵌り込む。これにより、内輪部材１１の内周面１１ｄを保護すると共に、保護カバー２０を嵌め込む際の位置決めが容易となる。更に、第１円筒部２２に設けられる抜止部２３は、第１円環部２１の配設側と反対の軸方向端部２２ａに設けられ、内輪部材１１の内周面１１ｄから内輪部材１１の車両インナー側端面１１ａと反対の車両アウター側端面１１ｃにわたって形成される。保護カバー２０は、内輪部材１１の車両アウター側端面１１ｃに引っかかることで嵌め込み状態を保持する構成であることから、クリープ現象に伴う保護カバー２０の抜け止めを防ぐことができる。また、抜止部２３は、径方向に弾性変形可能であるため、脱着が容易である。   Thus, the protective cover 20 of the embodiment protects the magnetized surface of the magnetic encoder unit 16 by the first annular portion 21 that covers the magnetic encoder unit 16. The first cylindrical portion 22 extends from the inner diameter end portion 21 a of the first annular portion 21 and fits into the inner peripheral surface 11 d of the inner ring member 11. Thereby, while protecting the internal peripheral surface 11d of the inner ring member 11, the positioning at the time of fitting the protective cover 20 becomes easy. Further, the retaining portion 23 provided in the first cylindrical portion 22 is provided in the axial end portion 22a opposite to the arrangement side of the first annular portion 21, and the inner ring member 11 has an inner peripheral surface 11 d to the inner ring member 11. It is formed over the vehicle outer side end surface 11c opposite to the vehicle inner side end surface 11a. Since the protective cover 20 is configured to retain the fitted state by being caught by the vehicle outer side end surface 11c of the inner ring member 11, it is possible to prevent the protective cover 20 from being detached due to a creep phenomenon. Moreover, since the retaining portion 23 can be elastically deformed in the radial direction, it can be easily detached.

また、折曲部２４の構成を有することで、車両用転がり軸受装置１０を車両に取付ける際に、保護カバー２０を外し忘れたとしても内輪部材１１にリヤアクスルシャフトＡ（シャフト）を挿通すると、折曲部２４がリヤアクスルシャフトＡに押されて外れる構成となる。そのため、保護カバー２０の外し忘れを防ぐことができる。また、保護カバー２０は、車両に取付けるまでの間に使用するものであることから、材料コストを鑑みれば、保形性を満たす範囲内で極力肉薄に形成したい。ここで、折曲部２４は、車両アウター側端面１１ｃにおいて径方向内方側に折り曲げられるため、第１円筒部２２の補強としての役割も果たし保護カバー２０全体の剛性向上を図ることができる。これにより、材料コストを抑制しつつ保形性を維持する保護カバー２０とし得る。   Further, by having the configuration of the bent portion 24, when the rolling bearing device 10 for a vehicle is attached to the vehicle, even if the protective cover 20 is forgotten to be removed, if the rear axle shaft A (shaft) is inserted into the inner ring member 11, the folding is performed. The bent portion 24 is pushed by the rear axle shaft A to be detached. Therefore, forgetting to remove the protective cover 20 can be prevented. Further, since the protective cover 20 is used until it is attached to the vehicle, it is desired to form the protective cover 20 as thin as possible within the range that satisfies the shape retaining property in view of the material cost. Here, since the bent portion 24 is bent inward in the radial direction at the vehicle outer side end surface 11c, it also serves as a reinforcement of the first cylindrical portion 22 and can improve the rigidity of the protective cover 20 as a whole. Thereby, it can be set as the protective cover 20 which maintains shape retention property, suppressing material cost.

また、上記構成の保護カバー２０を装着する車両用転がり軸受装置１０は、かかる保護カバー２０によって磁気エンコーダー部１６を好適に保護される。   Further, in the rolling bearing device 10 for a vehicle on which the protective cover 20 having the above-described configuration is mounted, the magnetic encoder unit 16 is suitably protected by the protective cover 20.

以上、本発明の実施形態１について説明したが、本発明の車輪用転がり軸受装置は、本実施の形態に限定されず、その他各種の形態で実施することができるものである。
例えば、図４，５に示すように抜止部２３は、少なくとも周方向に２つ構成されているものについて示したが、周方向に２つ以上あってもよい。 As mentioned above, although Embodiment 1 of this invention was demonstrated, the rolling bearing device for wheels of this invention is not limited to this Embodiment, It can implement with other various forms.
For example, as shown in FIGS. 4 and 5, at least two retaining portions 23 are shown in the circumferential direction, but two or more in the circumferential direction may be provided.

１０ 車両用転がり軸受装置
１１ 内輪部材
１１ａ 車両インナー側端面（第１の軸方向端面）
１１ｂ 外周面
１１ｃ 車両アウター側端面（第２の軸方向端面）
１１ｄ 内周面
１２ｃ センサ挿入孔
１２ｂ フランジ
１２ 外輪部材
１２ａ 車両インナー側の端部
１３ 転動体
１４ ボルト挿通孔
１５ 凹部
１５ａ 底部
１５ｂ 内周壁
１６ 磁気エンコーダー部
１７ センサー
２０ 保護カバー
２１ 第１円環部（円環部）
２１ａ 内径端部
２１ｂ 外径端部
２２ 第１円筒部（円筒部）
２２ａ 軸方向端部
２３ 抜止部
２４ 折曲部
２５ 第２円筒部
２５ａ 軸方向端部
２６ 第２円環部
２８ 把持部
２９ 孔部被覆片，
Ａ リヤアクスルシャフト（シャフト）
Ａ１ 段部
Ａ２ 圧入軸部
Ｃ 後輪懸架装置
Ｅ リヤアクスルハウジング（車体側部材）
Ｆ１ スペーサ
Ｆ２ リテーナリング
DESCRIPTION OF SYMBOLS 10 Rolling bearing apparatus 11 for vehicles Inner ring member 11a End surface of vehicle inner side (first axial end surface)
11b Outer peripheral surface 11c Vehicle outer side end surface (second axial direction end surface)
11 d Inner peripheral surface 12 c Sensor insertion hole 12 b Flange 12 Outer ring member 12 a End 13 on the inner side of the vehicle 13 Rolling element 14 Bolt insertion hole 15 Recess 15 a Bottom 15 b Inner peripheral wall 16 Magnetic encoder part 17 Sensor 20 Protective cover 21 First annular part ( Torus)
21a Inner diameter end 21b Outer diameter end 22 First cylindrical part (cylindrical part)
22a Axial end portion 23 Detachment portion 24 Bending portion 25 Second cylindrical portion 25a Axial end portion 26 Second annular portion 28 Grip portion 29 Hole covering piece,
A Rear axle shaft (shaft)
A1 Step A2 Press-fit shaft C Rear wheel suspension E Rear axle housing (vehicle body side member)
F1 Spacer F2 Retainer ring

Claims (3)

車両の車体側部材に固定される外輪部材と、前記外輪部材と同芯であり、且つ前記外輪部材の径方向内方側に配置されて内周面にシャフトが挿通される内輪部材と、前記外輪部材と前記内輪部材との間に介装される転動体と、前記内輪部材のうち前記車体側部材に対向する第１の軸方向端面側の前記内輪部材の外周面に配置される円環状の磁気エンコーダー部と、を備える車両用転がり軸受装置において前記磁気エンコーダー部を覆って保護する保護カバーであって、
前記保護カバーには、
前記磁気エンコーダー部を覆う円環部と、
前記円環部の内径端部から延出して前記内輪部材の内周面に嵌り込む円筒部と、
前記円筒部のうち前記円環部の配設側と反対の軸方向端部には、前記内輪部材の内周面から前記内輪部材の第１の軸方向端面と反対の第２の軸方向端面にわたって形成されることで保護カバーを抜け止めする抜止部を有しており、
前記抜止部は、前記円筒部より径方向外方側に折り曲げられるとともに、径方向に弾性変形可能であることを特徴とする保護カバー。 An outer ring member fixed to a vehicle body side member of a vehicle, an inner ring member that is concentric with the outer ring member and that is disposed on a radially inner side of the outer ring member and through which a shaft is inserted, and A rolling element interposed between the outer ring member and the inner ring member, and an annular ring disposed on the outer peripheral surface of the inner ring member on the first axial end face side facing the vehicle body side member of the inner ring member. A protective cover that covers and protects the magnetic encoder part in a rolling bearing device for a vehicle comprising:
The protective cover includes
An annular part covering the magnetic encoder part;
A cylindrical portion that extends from an inner diameter end of the annular portion and fits into an inner peripheral surface of the inner ring member;
A second axial end surface opposite to the first axial end surface of the inner ring member from an inner peripheral surface of the inner ring member is disposed at an axial end opposite to the arrangement side of the annular portion of the cylindrical portion. It has a retaining part that prevents the protective cover from coming off by being formed over,
The protective cover is bent in a radially outward direction from the cylindrical portion and is elastically deformable in the radial direction. 請求項１に記載の保護カバーであって、
前記円筒部のうち前記円環部の配設側と反対の軸方向端部には、更に前記円筒部より径方向内方側に折り曲げられる折曲部を有していることを特徴とする保護カバー。 The protective cover according to claim 1,
The protection characterized by having the bending part further bent in the radial direction inward side from the said cylindrical part in the axial direction edge part on the opposite side to the arrangement | positioning side of the said annular part among the said cylindrical parts. cover. 車両の車体側部材に固定される外輪部材と、前記外輪部材と同芯であり、且つ前記外輪部材の径方向内方側に配置され、内周面にシャフトが挿通される内輪部材と、
前記外輪部材と前記内輪部材との間に介装される転動体と、前記内輪部材のうち前記車体側部材に対向する第１の軸方向端面側の前記内輪部材の外周面に圧入される円環状の磁気エンコーダー部と、を備える車両用転がり軸受装置であって、
前記請求項１または２に記載の保護カバーを装着する車両用転がり軸受装置。
An outer ring member that is fixed to a vehicle body side member of the vehicle, an inner ring member that is concentric with the outer ring member and that is disposed on a radially inner side of the outer ring member and in which a shaft is inserted into an inner peripheral surface;
A rolling element interposed between the outer ring member and the inner ring member, and a circle press-fitted into the outer peripheral surface of the inner ring member on the first axial end face side of the inner ring member facing the vehicle body side member. An annular magnetic encoder unit, and a rolling bearing device for a vehicle,
The rolling bearing device for vehicles which mounts the protective cover of the said Claim 1 or 2.
JP2012001901A 2012-01-10 2012-01-10 Protective cover and vehicular rolling bearing device mounted with the same Pending JP2013142419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012001901A JP2013142419A (en) 2012-01-10 2012-01-10 Protective cover and vehicular rolling bearing device mounted with the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012001901A JP2013142419A (en) 2012-01-10 2012-01-10 Protective cover and vehicular rolling bearing device mounted with the same

Publications (1)

Publication Number Publication Date
JP2013142419A true JP2013142419A (en) 2013-07-22

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ID=49039100

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012001901A Pending JP2013142419A (en) 2012-01-10 2012-01-10 Protective cover and vehicular rolling bearing device mounted with the same

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Country Link
JP (1) JP2013142419A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016011705A (en) * 2014-06-27 2016-01-21 日本精工株式会社 Bearing unit with encoder
CN114986443A (en) * 2022-05-09 2022-09-02 中国人民解放军第五七一九工厂 Assembly protection structure of aero-engine support assembly, use method and preparation method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016011705A (en) * 2014-06-27 2016-01-21 日本精工株式会社 Bearing unit with encoder
CN114986443A (en) * 2022-05-09 2022-09-02 中国人民解放军第五七一九工厂 Assembly protection structure of aero-engine support assembly, use method and preparation method

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