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JP2006009889A - Rolling bearing unit with rotational speed detector - Google Patents

Rolling bearing unit with rotational speed detector Download PDF

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Publication number
JP2006009889A
JP2006009889A JP2004186150A JP2004186150A JP2006009889A JP 2006009889 A JP2006009889 A JP 2006009889A JP 2004186150 A JP2004186150 A JP 2004186150A JP 2004186150 A JP2004186150 A JP 2004186150A JP 2006009889 A JP2006009889 A JP 2006009889A
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Japan
Prior art keywords
cover
hole
insertion hole
peripheral surface
insertion portion
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Pending
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JP2004186150A
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Japanese (ja)
Inventor
Toshiaki Maeda
俊秋 前田
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NSK Ltd
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NSK Ltd
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Priority to JP2004186150A priority Critical patent/JP2006009889A/en
Publication of JP2006009889A publication Critical patent/JP2006009889A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • 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
    • F16C19/186—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 three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

【課題】 カバー１６ａを構成する底板部２０ａの外面の平面精度が悪い場合でも、挿入孔２２ａの内周面と挿入部２６ａの外周面に形成した係止溝２８の底面との間で弾性的に圧縮したＯリング２９の締め代が、円周方向の一部で不足するのを防止できる構造を実現する。
【解決手段】 上記挿入孔２２ａの内周面に、上記底板部２０ａの外面に開口して軸方向に延びる第一の凹溝と、この第一の凹溝の奥端から連続して周方向に延びる第二の凹溝３５とを形成する。上記挿入孔２２ａに上記挿入部２６ａを挿入した状態で、この挿入部２６ａの外周面に形成した突起３６を、上記第一の凹溝を通じて第二の凹溝３５に係合させる。これにより、通孔３１に挿通したボルト３３をねじ孔２４に螺合し、更に緊締した際に、上記挿入部２６ａが上記挿入孔２２ａに対して傾斜するのを防止して、上記課題を解決する。
【選択図】 図１PROBLEM TO BE SOLVED: To provide elasticity between an inner peripheral surface of an insertion hole 22a and a bottom surface of a locking groove 28 formed on an outer peripheral surface of an insertion portion 26a even when the planar accuracy of the outer surface of a bottom plate portion 20a constituting the cover 16a is poor. Thus, a structure capable of preventing the tightening allowance of the O-ring 29 compressed in part in the circumferential direction from being insufficient is realized.
SOLUTION: On the inner peripheral surface of the insertion hole 22a, a first concave groove that opens to the outer surface of the bottom plate portion 20a and extends in the axial direction, and a circumferential direction continuously from the inner end of the first concave groove. And a second concave groove 35 extending in the vertical direction. With the insertion portion 26a inserted into the insertion hole 22a, the projection 36 formed on the outer peripheral surface of the insertion portion 26a is engaged with the second concave groove 35 through the first concave groove. Thus, when the bolt 33 inserted through the through hole 31 is screwed into the screw hole 24 and further tightened, the insertion portion 26a is prevented from being inclined with respect to the insertion hole 22a, thereby solving the above-mentioned problem. To do.
[Selection] Figure 1

Description

この発明に係る回転速度検出装置付転がり軸受ユニットは、自動車の車輪を懸架装置に対して回転自在に支持すると共に、この車輪の回転速度を検出する為に利用する。   The rolling bearing unit with a rotational speed detecting device according to the present invention supports the wheel of an automobile so as to be rotatable with respect to the suspension device, and is used for detecting the rotational speed of the wheel.

自動車の車輪を懸架装置に対して回転自在に支持すると共に、アンチロックブレーキシステム（ＡＢＳ）やトラクションコントロールシステム（ＴＣＳ）等を制御すべく車輪の回転速度を検出する為に、回転速度検出装置付転がり軸受ユニットが広く使用されている。この様な回転速度検出装置付転がり軸受ユニットの１例として、特許文献１には、図７に示す様な構造が記載されている。   Rotating speed detection device is provided to detect the rotation speed of the wheel to control the anti-lock brake system (ABS), traction control system (TCS), etc. Rolling bearing units are widely used. As an example of such a rolling bearing unit with a rotational speed detection device, Patent Document 1 describes a structure as shown in FIG.

この図７に示した回転速度検出装置付転がり軸受ユニットは、静止輪である外輪１の内側に、回転輪であるハブ２及び内輪３を回転自在に支持している。この外輪１は、外周面に懸架装置に取り付ける為の結合フランジ４を、内周面に第一、第二の外輪軌道５ａ、５ｂを、それぞれ有する。又、上記ハブ２は、外周面の外端（特に示す場合を除き、軸方向に関して「外」とは、自動車への組み付け状態で車両の幅方向外側を言い、図１、５、６、７の左側。反対に、自動車への組付け状態で車両の幅方向中央側となる、図１、５、６、７の右側を、軸方向に関して「内」と言う。本明細書全体で同じ。）寄り部分に、車輪を支持する為の取付フランジ６を設けている。又、上記ハブ２の外周面の中間部に第一の内輪軌道７ａを形成すると共に、同じく内端寄り部分に形成した小径段部８に、その外周面に第二の内輪軌道７ｂを形成した上記内輪３を外嵌固定している。そして、上記ハブ２の内端部を径方向外方に塑性変形させて形成したかしめ部９により、上記内輪３の内端面を抑え付けている。   The rolling bearing unit with a rotational speed detection device shown in FIG. 7 rotatably supports a hub 2 and an inner ring 3 that are rotating wheels inside an outer ring 1 that is a stationary ring. The outer ring 1 has a coupling flange 4 for attaching to a suspension device on the outer peripheral surface, and first and second outer ring raceways 5a and 5b on the inner peripheral surface, respectively. The hub 2 is the outer end of the outer peripheral surface (unless otherwise indicated, “outside” with respect to the axial direction means the outside in the width direction of the vehicle in the state of being assembled to an automobile, and FIGS. On the other hand, the right side of Fig. 1, 5, 6 and 7 which is the central side in the width direction of the vehicle in the state where it is assembled to an automobile is referred to as "inside" with respect to the axial direction. ) A mounting flange 6 for supporting the wheel is provided on the side portion. Further, the first inner ring raceway 7a is formed in the intermediate portion of the outer peripheral surface of the hub 2, and the second inner ring raceway 7b is formed on the outer peripheral surface of the small-diameter step portion 8 formed in the portion near the inner end. The inner ring 3 is externally fixed. The inner end surface of the inner ring 3 is held down by a caulking portion 9 formed by plastically deforming the inner end portion of the hub 2 radially outward.

又、上記各外輪軌道５ａ、５ｂと上記各内輪軌道７ａ、７ｂとの間には、それぞれ複数個ずつの転動体１０、１０を転動自在に設け、上記外輪１の内側に、上記ハブ２及び内輪３を回転自在に支持している。尚、図示の例では、上記各転動体１０、１０として玉を使用しているが、重量が嵩む自動車用の軸受ユニットの場合には、転動体として円すいころを使用する場合もある。又、上記各転動体１０、１０を設置した空間の外端開口部は、シールリング１１により密閉している。   A plurality of rolling elements 10, 10 are provided between the outer ring raceways 5a, 5b and the inner ring raceways 7a, 7b, respectively, so that they can roll freely. And the inner ring 3 is rotatably supported. In the example shown in the figure, balls are used as the rolling elements 10 and 10, but in the case of an automobile bearing unit that is heavy in weight, tapered rollers may be used as the rolling elements. The outer end opening of the space in which the rolling elements 10 and 10 are installed is sealed with a seal ring 11.

更に、上記内輪３の端部外周面で上記第二の内輪軌道７ｂから外れた部分には、エンコーダ１２を外嵌固定している。このエンコーダ１２は、鋼板等の磁性金属板により断面略Ｔ字形で全体を円環状に形成した支持環１３と、この支持環１３を構成する円輪部１４の側面に添着したエンコーダ本体１５とを組み合わせて成る。このエンコーダ本体１５は、フェライト粉末を混入したゴム磁石等の永久磁石により全体を円輪状に形成したもので、軸方向に着磁すると共に、着磁の向きを、円周方向に関して交互に且つ等間隔で変化させている。従って、上記エンコーダ本体１５の側面には、Ｓ極とＮ極とが、交互に且つ等間隔で配置されている。   Further, an encoder 12 is fitted and fixed to a part of the outer peripheral surface of the end portion of the inner ring 3 that is out of the second inner ring raceway 7b. The encoder 12 includes a support ring 13 having a substantially T-shaped cross section formed of a magnetic metal plate such as a steel plate, and an encoder body 15 attached to a side surface of an annular portion 14 constituting the support ring 13. Combining. The encoder body 15 is formed in a ring shape by a permanent magnet such as a rubber magnet mixed with ferrite powder. The encoder body 15 is magnetized in the axial direction, and the direction of magnetization is alternately and equally in the circumferential direction. It is changed at intervals. Therefore, on the side surface of the encoder body 15, S poles and N poles are alternately arranged at equal intervals.

又、前記外輪１の内端開口部には、カバー１６を被着して、この外輪１の内端開口部を塞いでいる。このカバー１６は、合成樹脂を射出成形する事により形成した有底円筒状の本体１７と、この本体１７の開口部に結合したステンレス鋼板製の嵌合筒１８とから成る。そして、このうちの嵌合筒１８を上記外輪１の内端部に締り嵌めで外嵌固定する事により、この外輪１の内端開口部に被着している。又、この状態で、上記本体１７の開口側端面と上記外輪１の内端面との間でＯリング１９を弾性的に圧縮する事により、この間部分を密封している。又、上記本体１７を構成する底板部２０の外面（図７の右側面）の円周方向一部分に、軸方向に突出する突部２１を設けている。そして、この突部２１の一部で上記エンコーダ本体１５の円周方向一部と対向する部分に挿入孔２２を、上記本体１７を軸方向に貫通する状態で設けている。又、上記突部２１の一部で上記挿入孔２２から外れた部分にナット２３をモールドすると共に、このナット２３の内側に設けられたねじ孔２４を上記突部２１の外面に開口させている。   Further, a cover 16 is attached to the inner end opening of the outer ring 1 to block the inner end opening of the outer ring 1. The cover 16 includes a bottomed cylindrical main body 17 formed by injection molding of a synthetic resin, and a fitting tube 18 made of a stainless steel plate coupled to an opening of the main body 17. Of these, the fitting cylinder 18 is attached to the inner end opening of the outer ring 1 by being fitted and fixed to the inner end of the outer ring 1 with an interference fit. In this state, the O-ring 19 is elastically compressed between the opening-side end surface of the main body 17 and the inner end surface of the outer ring 1, thereby sealing the portion between them. Further, a protruding portion 21 that protrudes in the axial direction is provided on a portion of the outer surface of the bottom plate portion 20 (the right side surface in FIG. 7) constituting the main body 17 in the circumferential direction. An insertion hole 22 is provided in a part of the protrusion 21 that faces a part of the encoder body 15 in the circumferential direction so as to penetrate the body 17 in the axial direction. In addition, a nut 23 is molded at a part of the protrusion 21 that is out of the insertion hole 22, and a screw hole 24 provided inside the nut 23 is opened on the outer surface of the protrusion 21. .

又、上記カバー１６には、センサホルダ２５を支持固定している。このセンサホルダ２５は、それぞれが合成樹脂により造られた、挿入部２６及び取付フランジ部２７を有する。このうちの挿入部２６の内部には、図示しないセンサを包埋している。そして、上記挿入部２６の先端面（図７の左端面）部分に、このセンサの検出部を配置している。又、この挿入部２６の外周面には、全周に亙り係止溝２８を形成すると共に、この係止溝２８にＯリング２９を装着している。又、上記取付フランジ部２７は、上記挿入部２６の基端部から、この挿入部２６の中心軸に対して直交する方向に延出する状態で設けられている。この様な取付フランジ部２７の外面（図７の右側面）の一部で上記挿入部２６と整合する部分には、上記センサの出力を取り出す為のハーネス３０の導出部を設けている。又、上記取付フランジ部２７の一部で上記挿入部２６から外れた部分（後述する様に、この挿入部２６を上記挿入孔２２に挿入した状態で、上記ねじ孔２４に整合し得る部分）には、通孔３１を、当該部分を軸方向に貫通する状態で設けている。図示の例では、上記取付フランジ部２５の一部にモールドした金属製の補強環３２の中心孔を、上記通孔３１としている。   A sensor holder 25 is supported and fixed to the cover 16. The sensor holder 25 has an insertion portion 26 and a mounting flange portion 27 each made of synthetic resin. A sensor (not shown) is embedded in the insertion portion 26 among these. And the detection part of this sensor is arrange | positioned in the front end surface (left end surface of FIG. 7) part of the said insertion part 26. As shown in FIG. In addition, a locking groove 28 is formed on the entire outer periphery of the insertion portion 26 and an O-ring 29 is attached to the locking groove 28. Further, the mounting flange portion 27 is provided so as to extend from the base end portion of the insertion portion 26 in a direction orthogonal to the central axis of the insertion portion 26. A part of the outer surface of the mounting flange portion 27 (the right side surface in FIG. 7) that is aligned with the insertion portion 26 is provided with a lead-out portion of the harness 30 for taking out the output of the sensor. Further, a part of the mounting flange 27 that is disengaged from the insertion part 26 (a part that can be aligned with the screw hole 24 with the insertion part 26 inserted into the insertion hole 22 as will be described later). The through-hole 31 is provided so as to penetrate the portion in the axial direction. In the illustrated example, a central hole of a metal reinforcing ring 32 molded on a part of the mounting flange portion 25 is used as the through hole 31.

この様なセンサホルダ２５を上記カバー１６に支持固定する場合には、上記挿入部２６を上記挿入孔２２に挿入すると共に、上記取付フランジ部２７の内面（図７の左面）を上記カバー１６の突部２１の外面に当接させる。これにより、上記挿入部２６の先端面を前記エンコーダ本体１５の側面に対し、軸方向に近接対向させる。これと共に、上記挿入部２６の外周面に形成した係止溝２８の底面と上記挿入孔２２の内周面との間でＯリング２９を弾性的に圧縮し、これら挿入部２６の外周面と挿入孔２２の内周面との間を密封する。そして、この状態で、上記取付フランジ部２７に設けた通孔３１に軸方向内側からボルト３３を挿通すると共に、このボルト３３を上記突部２１の外面に開口させたねじ孔２４に螺合し、更に緊締する。これにより、上記取付フランジ部２７を上記突部２１に結合固定する。   When such a sensor holder 25 is supported and fixed to the cover 16, the insertion portion 26 is inserted into the insertion hole 22, and the inner surface (the left surface in FIG. 7) of the mounting flange portion 27 is inserted into the cover 16. It abuts on the outer surface of the protrusion 21. As a result, the distal end surface of the insertion portion 26 is brought close to and opposed to the side surface of the encoder body 15 in the axial direction. At the same time, the O-ring 29 is elastically compressed between the bottom surface of the locking groove 28 formed on the outer peripheral surface of the insertion portion 26 and the inner peripheral surface of the insertion hole 22. The space between the inner peripheral surface of the insertion hole 22 is sealed. In this state, the bolt 33 is inserted from the axially inside into the through hole 31 provided in the mounting flange portion 27, and the bolt 33 is screwed into the screw hole 24 opened on the outer surface of the protrusion 21. Tighten further. Thereby, the mounting flange portion 27 is coupled and fixed to the protrusion 21.

上述の様に構成する回転速度検出装置付転がり軸受ユニットの使用時には、外輪１の外周面に設けた結合フランジ４を懸架装置に結合固定すると共に、ハブ２の外周面に設けた取付フランジ６に車輪を支持固定する。この状態で、この車輪と共にエンコーダ１２が回転すると、このエンコーダ１２の回転速度に応じて、センサの出力信号の周波数が変化する。従って、このセンサの出力信号をハーネス３０を通じて図示しない制御器に送れば、ＡＢＳやＴＣＳを適切に制御できる。又、上述した構造の場合、ねじ孔２４に対するボルト３３の係脱を行なう事に基づき、転がり軸受ユニットに対するセンサホルダ２５の着脱を容易に行なえる。この為、例えば、上記転がり軸受ユニットと上記センサホルダ２５とのうちの何れか一方の修理・交換を行なう際の手間及びコストを軽減できる。   When the rolling bearing unit with a rotational speed detecting device configured as described above is used, the coupling flange 4 provided on the outer circumferential surface of the outer ring 1 is coupled and fixed to the suspension device, and the mounting flange 6 provided on the outer circumferential surface of the hub 2 is attached to the mounting flange 6. Support and fix the wheel. In this state, when the encoder 12 rotates together with the wheel, the frequency of the output signal of the sensor changes according to the rotation speed of the encoder 12. Therefore, if the output signal of this sensor is sent to a controller (not shown) through the harness 30, the ABS and TCS can be controlled appropriately. In the case of the structure described above, the sensor holder 25 can be easily attached to and detached from the rolling bearing unit by engaging / disengaging the bolt 33 with the screw hole 24. For this reason, for example, it is possible to reduce labor and cost when repairing or exchanging any one of the rolling bearing unit and the sensor holder 25.

ところが、上述した様な従来構造の場合、上記取付フランジ部２７の内面を当接させる部位である、上記突部２１の外面の平面精度が悪い場合には、上記ボルト３３を上記ねじ孔２４に螺合・緊締した際に、上記取付フランジ部２７の内面のうち上記挿入部２６の周囲部分が上記突部２１の外面から浮き上がって、この挿入部２６の中心軸が上記挿入孔２２の中心軸に対して傾斜する可能性がある。そして、傾斜した場合には、上記挿入部２６の外周面と上記挿入孔２２の内周面との間で弾性的に圧縮したＯリング２９の締め代が、その円周方向の一部で低下し、このＯリング２９のシール性能を十分に確保できなくなる可能性がある。   However, in the case of the conventional structure as described above, the bolt 33 is inserted into the screw hole 24 when the planar accuracy of the outer surface of the protruding portion 21, which is the portion that contacts the inner surface of the mounting flange portion 27, is poor. When screwing and tightening, the peripheral portion of the insertion portion 26 of the inner surface of the mounting flange portion 27 is lifted from the outer surface of the projection 21, and the central axis of the insertion portion 26 is the central axis of the insertion hole 22. There is a possibility of tilting. And when it inclines, the interference of the O ring 29 elastically compressed between the outer peripheral surface of the said insertion part 26 and the inner peripheral surface of the said insertion hole 22 falls in a part of the circumferential direction. In addition, the sealing performance of the O-ring 29 may not be sufficiently ensured.

特開２００１−３１８１０５号公報JP 2001-318105 A

本発明の回転速度検出装置付転がり軸受ユニットは、上述の様な事情に鑑み、センサホルダを構成する取付フランジの側面を当接させる部位である、カバーの外面の平面精度が悪い場合でも、上記センサホルダを構成する挿入部の外周面と上記カバーの一部に設けた挿入孔の内周面との間で弾性的に圧縮するＯリングのシール性能を十分に確保できる構造を実現すべく発明したものである。   The rolling bearing unit with a rotational speed detection device of the present invention is a part where the side surface of the mounting flange constituting the sensor holder comes into contact in view of the above situation, even when the planar accuracy of the outer surface of the cover is poor. An invention for realizing a structure capable of sufficiently ensuring the sealing performance of an O-ring that is elastically compressed between the outer peripheral surface of the insertion portion constituting the sensor holder and the inner peripheral surface of the insertion hole provided in a part of the cover. It is a thing.

本発明の回転速度検出装置付転がり軸受ユニットは、静止輪と、回転輪と、複数個の転動体と、エンコーダと、カバーと、センサホルダとを備える。
このうちの静止輪は、静止側周面に静止側軌道を有し、使用時にも回転しない。
又、上記回転輪は、回転側周面に回転側軌道を有し、使用時に回転する。
又、上記各転動体は、上記静止側軌道と上記回転側軌道との間に転動自在に設けられている。
又、上記エンコーダは、上記回転輪に嵌合固定されている。
又、上記カバーは、上記静止輪に結合固定されている。
又、上記センサホルダは、センサを保持しており、上記カバーに支持した状態でこのセンサを上記エンコーダに対向させている。又、このセンサホルダは、上記カバーの一部に形成した挿入孔を通じてこのカバーの内側に挿入した、上記センサを保持した挿入部と、この挿入部の外周面に全周に亙り形成した係止溝に係止され、この係止溝の底面と上記挿入孔の内周面との間で弾性的に圧縮されたＯリングと、上記挿入部の基端部に設けられて、側面を上記カバーの外面に当接させた取付フランジ部と、この取付フランジ部の一部を貫通する状態で設けられた通孔とを有する。
そして、上記カバーの一部でこの通孔と整合する部分にはねじ孔を、直接又は別体の部材を介して設けており、上記センサホルダは、上記通孔に挿通したボルトを上記ねじ孔に螺合させる事に基づいて上記カバーに結合されている。 The rolling bearing unit with a rotational speed detection device of the present invention includes a stationary wheel, a rotating wheel, a plurality of rolling elements, an encoder, a cover, and a sensor holder.
Among these, the stationary wheel has a stationary side track on the stationary side peripheral surface, and does not rotate during use.
The rotating wheel has a rotation-side track on the rotation-side peripheral surface, and rotates during use.
Each of the rolling elements is provided between the stationary side track and the rotation side track so as to freely roll.
The encoder is fitted and fixed to the rotating wheel.
The cover is coupled and fixed to the stationary wheel.
The sensor holder holds the sensor, and the sensor is opposed to the encoder while being supported by the cover. The sensor holder is inserted into the cover through an insertion hole formed in a part of the cover, the insertion part holding the sensor, and a latch formed on the outer peripheral surface of the insertion part over the entire circumference. An O-ring that is locked in the groove and elastically compressed between the bottom surface of the locking groove and the inner peripheral surface of the insertion hole, and is provided at the base end portion of the insertion portion, and the side surface is covered with the cover And a through-hole provided in a state of penetrating a part of the mounting flange.
A part of the cover that is aligned with the through hole is provided with a screw hole directly or via a separate member, and the sensor holder has a bolt inserted through the through hole in the screw hole. It is connected to the cover based on being screwed to the cover.

特に、本発明の回転速度検出装置付転がり軸受ユニットに於いては、上記挿入孔の内周面に挿入孔側係合部を設けている。これと共に、上記挿入部の外周面に、この挿入部を上記挿入孔に挿入すると共に上記取付フランジ部の側面を上記カバーの外面に当接させた場合にのみ、上記挿入部を回転させる事に基づいて上記挿入孔側係合部に係脱する事ができる、挿入部側係合部を設けている。   In particular, in the rolling bearing unit with a rotational speed detection device of the present invention, the insertion hole side engagement portion is provided on the inner peripheral surface of the insertion hole. At the same time, the insertion portion is rotated only when the insertion portion is inserted into the insertion hole on the outer peripheral surface of the insertion portion and the side surface of the mounting flange portion is brought into contact with the outer surface of the cover. An insertion portion side engagement portion that can be engaged with and disengaged from the insertion hole side engagement portion is provided.

上述の様に構成する本発明の回転速度検出装置付転がり軸受ユニットの場合には、挿入部を挿入孔に挿入すると共に、取付フランジ部の側面をカバーの外面に当接させた状態で、挿入孔側係合部と挿入部側係合部とを係合させる事ができる。この為、上記カバーの外面の平面精度が悪い場合でも、取付フランジ部に設けた通孔に挿通したボルトをカバーに設けたねじ孔に螺合し、更に緊締した際に、上記取付フランジ部の側面のうち上記挿入部の周囲部分が上記カバーの外面から浮き上がって、この挿入部の中心軸が上記挿入孔の中心軸に対して傾く事を防止できる。従って、これら挿入部の外周面と挿入孔の内周面との間で弾性的に圧縮したＯリングの締め代が円周方向の一部で低下する事を防止できる。この結果、このＯリングのシール性能を十分に確保する事ができる。   In the case of the rolling bearing unit with a rotational speed detection device of the present invention configured as described above, the insertion portion is inserted into the insertion hole, and the insertion flange portion is inserted with the side surface of the mounting flange portion being in contact with the outer surface of the cover. The hole side engaging portion and the insertion portion side engaging portion can be engaged. For this reason, even when the flat surface accuracy of the outer surface of the cover is poor, when the bolt inserted into the through hole provided in the mounting flange portion is screwed into the screw hole provided in the cover and further tightened, the mounting flange portion It is possible to prevent the peripheral portion of the insertion portion of the side surface from floating from the outer surface of the cover and tilting the central axis of the insertion portion with respect to the central axis of the insertion hole. Therefore, it is possible to prevent the tightening margin of the O-ring elastically compressed between the outer peripheral surface of these insertion portions and the inner peripheral surface of the insertion hole from being lowered in a part in the circumferential direction. As a result, the sealing performance of the O-ring can be sufficiently ensured.

本発明を実施する場合に、好ましくは、請求項２に記載した様に、挿入孔の内周面に、一端をカバーの外面に開口させた状態で軸方向に形成された第一の凹溝と、一端をこの第一の凹溝に開口させた状態で円周方向に形成された第二の凹溝とを設けて、このうちの第二の凹溝を挿入孔側係合部とする。これと共に、挿入部の外周面の一部に、この挿入部を上記挿入孔の内側に挿入する事に基づいて上記第一の凹溝内に進入させる事ができ、且つ、上記挿入部を上記挿入孔に挿入すると共に取付フランジ部の側面を上記カバーの外面に当接させた場合にのみ、上記挿入部を回転させる事に基づいて上記第二の凹溝に係脱する事ができる突起を設けて、この突起を挿入部側係合部とする。
この様な構成を採用すれば、本発明を簡単な構造で実施する事ができる。 When carrying out the present invention, preferably, as described in claim 2, the first concave groove formed in the axial direction with one end opened to the outer surface of the cover on the inner peripheral surface of the insertion hole And a second concave groove formed in the circumferential direction with one end opened to the first concave groove, and the second concave groove is used as the insertion hole side engaging portion. . At the same time, the insertion portion can be inserted into the first concave groove based on the insertion of the insertion portion inside the insertion hole into a part of the outer peripheral surface of the insertion portion, and the insertion portion is Only when the insertion flange is inserted and the side surface of the mounting flange portion is brought into contact with the outer surface of the cover, a protrusion that can be engaged with and disengaged from the second concave groove based on the rotation of the insertion portion. It is provided and this projection serves as an insertion portion side engaging portion.
By adopting such a configuration, the present invention can be implemented with a simple structure.

図１〜４は、本発明の実施例を示している。尚、本実施例の特徴は、カバー１６ａとセンサホルダ２５ａとの結合部分の構造にある。その他の部分の構造及び作用は、前述の図７に示した従来構造とほぼ同様である為、同等部分には同一符号を付して、重複する説明を省略若しくは簡略にし、以下、本実施例の特徴部分並びに上記従来構造と異なる部分を中心に説明する。   1 to 4 show an embodiment of the present invention. The feature of this embodiment is the structure of the connecting portion between the cover 16a and the sensor holder 25a. Since the structure and operation of the other parts are almost the same as those of the conventional structure shown in FIG. 7, the same reference numerals are given to the same parts, and redundant explanations are omitted or simplified. The description will focus on the features of the above and parts different from the conventional structure.

本実施例の場合、上記カバー１６ａを構成する本体１７ａの底板部２０ａに設けた挿入孔２２ａの内周面に、第一の凹溝３４と第二の凹溝３５（挿入孔側係合部）とを組み合わせて成る、Ｌ字溝を形成している。このうちの第一の凹溝３４は、上記挿入孔２２ａの軸方向内端部（図１の右端部）の円周方向一部に軸方向に亙って形成すると共に、一端（図３の上端）を上記底板部２０ａの外面（図１の右面、図２の手前面、図３の上面）に開口させている。尚、本実施例の場合には、図２に示す様に、上記第一の凹溝３４は、上記挿入孔２２ａの内周面のうち、上記底板部２０ａに設けたねじ孔２４から見て径方向反対側部分から反時計方向に４５度ずれた位置に形成している。又、上記第二の凹溝３５は、一端（図２、３の左端）を上記第一の凹溝３４の他端（図３の下端）に開口させた状態で、円周方向に形成している。又、本実施例の場合には、図２に示す様に、上記第二の凹溝３５の他端（図２、３の右端）は、上記挿入孔２２ａの内周面のうち、上記ねじ孔２４から見て径方向反対側部分に位置させている。   In the case of the present embodiment, the first concave groove 34 and the second concave groove 35 (insertion hole side engaging portion) are formed on the inner peripheral surface of the insertion hole 22a provided in the bottom plate portion 20a of the main body 17a constituting the cover 16a. ) To form an L-shaped groove. Of these, the first concave groove 34 is formed over the axial direction at a part of the inner end of the insertion hole 22a in the axial direction (the right end of FIG. 1) in the axial direction, and one end (of FIG. 3). The upper end is opened on the outer surface (the right side in FIG. 1, the front side in FIG. 2, the top side in FIG. 3) of the bottom plate 20a. In the case of the present embodiment, as shown in FIG. 2, the first concave groove 34 is seen from the screw hole 24 provided in the bottom plate portion 20a on the inner peripheral surface of the insertion hole 22a. It is formed at a position shifted by 45 degrees counterclockwise from the radially opposite portion. The second groove 35 is formed in the circumferential direction with one end (left end in FIGS. 2 and 3) opened to the other end (lower end in FIG. 3) of the first groove 34. ing. In the case of this embodiment, as shown in FIG. 2, the other end (the right end in FIGS. 2 and 3) of the second concave groove 35 is the screw of the inner peripheral surface of the insertion hole 22a. It is located on the opposite side in the radial direction when viewed from the hole 24.

又、本実施例の場合、上記センサホルダ２５ａを構成する挿入部２６ａの外周面のうち、係止溝２８を形成した部分よりも軸方向基端側｛図１及び図４（Ａ）の右端側｝部分の円周方向一部（上記センサホルダ２５ａを構成する取付フランジ部２７ａに設けた通孔３１から見て径方向反対側部分）に、上記第一、第二の各凹溝３４、３５内に進入自在な突起３６を設けている。本実施例の場合には、図１に示す様に、上記取付フランジ部２７ａの内面から上記突起３６の側面までの軸方向距離Ｌ36と、上記カバー１６ａを構成する底板部２０ａの外面から上記第二の凹溝３５までの距離Ｌ35とを、互いに等しく（Ｌ36＝Ｌ35）している。又、この第二の凹溝３５の幅Ｗ35（図３参照）は、上記突起３６の幅Ｗ36｛図４（Ａ）参照｝とほぼ同じ（Ｗ35≒Ｗ36）として、これら第二の凹溝３５と突起３６とを、がたつきなく係合させられる様にしている。 In the case of the present embodiment, the axial base end side of the outer peripheral surface of the insertion portion 26a constituting the sensor holder 25a with respect to the portion where the locking groove 28 is formed {the right end in FIGS. 1 and 4A) Side} portion in the circumferential direction part (diameter opposite side portion as viewed from the through hole 31 provided in the mounting flange portion 27a constituting the sensor holder 25a), the first and second concave grooves 34, Protrusions 36 that can freely enter are provided in 35. In the case of the present embodiment, as shown in FIG. 1, the axial distance L 36 from the inner surface of the mounting flange portion 27a to the side surface of the protrusion 36 and the outer surface of the bottom plate portion 20a constituting the cover 16a The distance L 35 to the second groove 35 is equal to each other (L 36 = L 35 ). The width W 35 (see FIG. 3) of the second concave groove 35 is substantially the same as the width W 36 of the protrusion 36 (see FIG. 4A) (W 35 ≈W 36 ). The concave grooves 35 and the projections 36 can be engaged with each other without rattling.

上述の様なセンサホルダ２５ａを上記カバー１６ａに支持固定する場合には、このカバー１６ａを構成する底板部２０ａの外面側から、この底板部２０ａに設けた挿入孔２２ａに、上記センサホルダ２５ａを構成する挿入部２６ａを挿入する。これと共に、上記突起３６を上記第一の凹溝３４内に進入させる。これにより、上記センサホルダ２５ａを構成する取付フランジ部２７ａの内面を、上記底板部２０ａの外面に当接させる。次いで、この状態で、上記センサホルダ２５ａを、上記挿入部２６ａの中心軸を中心に回転させる。これにより、上記突起３６を、上記第二の凹溝３５の奥部にまで進入させる（この第二の凹溝３５に係合させる）と共に、上記取付フランジ部２７ａに設けた通孔３１を、上記底板部２０ａに設けたねじ孔２４に整合させる。そして、この状態で、図１に示す様に、上記取付フランジ部２７ａの外面側から上記通孔３１に、ボルト３３の杆部を挿通させると共に、この杆部の先端側部分に設けた雄ねじ部を上記ねじ孔２４に螺合し、更に緊締する。これにより、上記取付フランジ部２７ａを上記底板部２０ａに結合固定する。   When the sensor holder 25a as described above is supported and fixed to the cover 16a, the sensor holder 25a is inserted into the insertion hole 22a provided in the bottom plate portion 20a from the outer surface side of the bottom plate portion 20a constituting the cover 16a. The constituting insertion portion 26a is inserted. At the same time, the protrusion 36 enters the first concave groove 34. Thereby, the inner surface of the mounting flange portion 27a constituting the sensor holder 25a is brought into contact with the outer surface of the bottom plate portion 20a. Next, in this state, the sensor holder 25a is rotated around the central axis of the insertion portion 26a. Thereby, the protrusion 36 is caused to enter the back of the second groove 35 (engaged with the second groove 35), and the through-hole 31 provided in the mounting flange portion 27a is The screw hole 24 provided in the bottom plate portion 20a is aligned. In this state, as shown in FIG. 1, the flange portion of the bolt 33 is inserted into the through hole 31 from the outer surface side of the mounting flange portion 27 a, and the male screw portion provided at the tip side portion of the flange portion Is screwed into the screw hole 24 and further tightened. Thereby, the mounting flange portion 27a is coupled and fixed to the bottom plate portion 20a.

この様にしてセンサホルダ２５ａをカバー１６ａに支持固定する本実施例の場合、上述の様にボルト３３をねじ孔２４に螺合し、更に緊締する際には、上記挿入部２６ａの外周面に設けた突起３６が、上記挿入孔２２ａの内周面に設けた第二の凹溝３５に係合する。この為、上記カバー１６ａを構成する底板部２０ａの外面の平面精度が悪い場合でも、上述の様にボルト３３をねじ孔２４に螺合し、更に緊締する際に、上記取付フランジ部２７ａの内面のうち上記挿入部２６ａの周囲部分が上記底板部２０ａの外面から浮き上がって、この挿入部２６ａの中心軸が上記挿入孔２２ａの中心軸に対して傾く事を防止できる。従って、この挿入部２６ａの外周面に形成した係止溝２８の底面と上記挿入孔２２ａの内周面との間で弾性的に圧縮したＯリング２９の締め代が円周方向の一部で低下する事を防止できる。この結果、このＯリング２９のシール性能を十分に確保する事ができる。   In this embodiment in which the sensor holder 25a is supported and fixed to the cover 16a in this way, when the bolt 33 is screwed into the screw hole 24 and further tightened as described above, the outer periphery of the insertion portion 26a is fixed. The provided protrusion 36 engages with the second concave groove 35 provided on the inner peripheral surface of the insertion hole 22a. Therefore, even when the flat surface accuracy of the outer surface of the bottom plate portion 20a constituting the cover 16a is poor, when the bolt 33 is screwed into the screw hole 24 and further tightened as described above, the inner surface of the mounting flange portion 27a. Among them, the peripheral portion of the insertion portion 26a can be lifted from the outer surface of the bottom plate portion 20a, and the central axis of the insertion portion 26a can be prevented from being inclined with respect to the central axis of the insertion hole 22a. Accordingly, the tightening allowance of the O-ring 29 elastically compressed between the bottom surface of the locking groove 28 formed on the outer peripheral surface of the insertion portion 26a and the inner peripheral surface of the insertion hole 22a is part of the circumferential direction. Decrease can be prevented. As a result, the sealing performance of the O-ring 29 can be sufficiently ensured.

尚、本実施例の場合も、エンコーダ１２ａを構成する支持環１３ａは、内輪３の内端部に外嵌固定している。但し、本実施例の場合には、この内輪３の内端面からの、上記支持環１３ａを構成する円輪部１４の軸方向内方への突出量を大きくする事により、この円輪部１４の側面に添着固定したエンコーダ本体１５の被検出面（図１の右側面）を、ハブ２の内端部に形成したかしめ部９の内端面よりも軸方向内方に配置している。そして、この様な構成を採用する事により、上記エンコーダ本体１５の被検出面に近接対向させる部位である、上記センサホルダ２５ａを構成する挿入部２６ａの先端部を、上記かしめ部９から遠い位置に配置できる様にしている。従って、本実施例の場合には、上記挿入部２６ａの先端部が上記かしめ部９と干渉する事を確実に防止できる。   In the case of this embodiment as well, the support ring 13a constituting the encoder 12a is fitted and fixed to the inner end of the inner ring 3. However, in the case of the present embodiment, the annular portion 14 is increased by increasing the amount of projection of the annular portion 14 constituting the support ring 13a in the axial direction from the inner end surface of the inner race 3. The surface to be detected (the right side surface in FIG. 1) of the encoder body 15 attached and fixed to the side surface is disposed inward in the axial direction from the inner end surface of the caulking portion 9 formed at the inner end portion of the hub 2. By adopting such a configuration, the distal end portion of the insertion portion 26a that constitutes the sensor holder 25a, which is a portion that faces the detection surface of the encoder main body 15 in proximity, is positioned far from the caulking portion 9. It can be arranged in. Therefore, in the case of the present embodiment, it is possible to reliably prevent the distal end portion of the insertion portion 26a from interfering with the caulking portion 9.

尚、上述した実施例では、挿入孔側係合部を凹溝とし、挿入部側係合部を突起３６としたが、本発明を実施する場合には、挿入孔側係合部を突起とし、挿入部側係合部を凹溝とする事もできる。但し、この場合には、センサホルダの挿入部のうち、Ｏリングを装着した部分の直径を、挿入部側係合部である凹溝の溝底径以下にする（挿入部を、先細の段付形状とする）。これに合わせて、挿入孔も段付形状とする。又、挿入孔側係合部と挿入部側係合部とを係合させて成る係合部位の円周方向位置は、上述した実施例で示した位置には限られない。更に、この係合部位は、上述した実施例の様に円周方向１個所にのみ設ける他、円周方向複数個所に設ける事もできる。   In the above-described embodiment, the insertion hole side engaging portion is a concave groove and the insertion portion side engaging portion is a protrusion 36. However, when the present invention is implemented, the insertion hole side engaging portion is a protrusion. In addition, the insertion portion side engaging portion can be a concave groove. However, in this case, the diameter of the portion where the O-ring is mounted in the insertion portion of the sensor holder is set to be equal to or smaller than the groove bottom diameter of the concave groove which is the insertion portion side engagement portion (the insertion portion is tapered step). With a shape). In accordance with this, the insertion hole has a stepped shape. Further, the circumferential position of the engagement portion formed by engaging the insertion hole side engagement portion and the insertion portion side engagement portion is not limited to the position shown in the above-described embodiment. Furthermore, this engagement part can be provided only at one place in the circumferential direction as in the above-described embodiment, or can be provided at a plurality of places in the circumferential direction.

又、本発明を実施する場合には、エンコーダの支持部の構造として、図５〜６に示す様な構造を採用する事もできる。これら図５〜６に示した構造の場合も、上述した実施例の場合と同様、エンコーダ１２ｂ（１２ｃ）は、磁性金属板製の支持環１３ｂ（１３ｃ）と、永久磁石製のエンコーダ本体１５ｂ（１５ｃ）とを互いに組み合わせて成る。但し、このうちの支持環１３ｂ（１３ｃ）は、断面Ｌ字形で全体を円環状に構成しており、円筒部３７と円輪部１４ｂ（１４ｃ）とを備える。又、このうちの円輪部１４ｂ（１４ｃ）の側面（図５〜６の右側面）に、円輪状に形成した上記エンコーダ本体１５ｂ（１５ｃ）を添着固定している。そして、上記円筒部３７の基端部（図５〜６の左端部）を、ハブ２（図１、７参照）の内端部に外嵌固定した内輪３の内端部に、締り嵌めで外嵌固定している。特に、この様に外嵌固定した状態で、上記内輪３の内端部に対する上記円筒部３７の嵌合代の軸方向寸法Ａを、上記エンコーダ１２ｂ（１２ｃ）全体の軸方向寸法Ｂの５０％よりも小さく（Ａ＜０．５Ｂ）している。   Moreover, when implementing this invention, a structure as shown to FIGS. 5-6 is also employable as a structure of the support part of an encoder. In the case of the structures shown in FIGS. 5 to 6, as in the case of the above-described embodiment, the encoder 12b (12c) includes a support ring 13b (13c) made of a magnetic metal plate and an encoder body 15b made of a permanent magnet ( 15c) in combination with each other. However, of these, the support ring 13b (13c) has an L-shaped cross section and is formed into an annular shape as a whole, and includes a cylindrical portion 37 and an annular portion 14b (14c). Further, the encoder body 15b (15c) formed in an annular shape is attached and fixed to the side surface (the right side surface in FIGS. 5 to 6) of the annular portion 14b (14c). Then, the base end portion (the left end portion in FIGS. 5 to 6) of the cylindrical portion 37 is tightly fitted to the inner end portion of the inner ring 3 that is externally fitted and fixed to the inner end portion of the hub 2 (see FIGS. 1 and 7). The outer fitting is fixed. In particular, with the outer fitting fixed in this manner, the axial dimension A of the fitting margin of the cylindrical portion 37 with respect to the inner end portion of the inner ring 3 is 50% of the axial dimension B of the entire encoder 12b (12c). Smaller than (A <0.5B).

上述の図５〜６に示した様な構造を採用すれば、上記内輪３から上記エンコーダ本体１５ｂ（１５ｃ）までの軸方向距離を大きくできる。この為、上記内輪３を含む転がり軸受ユニットに付着している残留磁束密度が、上記支持環１３ｂ（１３ｃ）を通じて、上記エンコーダ本体１５ｂ（１５ｃ）の発生磁界に影響する割合を抑えられる。従って、上記内輪３に対する上記エンコーダ１２ｂ（１２ｃ）の組み付け後も、上記エンコーダ本体１５ｂ（１５ｃ）の発生磁界の分布を良好にできる。この結果、回転速度検出の信頼性を向上させる事ができる。   If the structure as shown in FIGS. 5 to 6 is employed, the axial distance from the inner ring 3 to the encoder body 15b (15c) can be increased. For this reason, the ratio that the residual magnetic flux density attached to the rolling bearing unit including the inner ring 3 affects the magnetic field generated by the encoder body 15b (15c) through the support ring 13b (13c) can be suppressed. Therefore, even after the encoder 12b (12c) is assembled to the inner ring 3, the distribution of the magnetic field generated by the encoder main body 15b (15c) can be improved. As a result, the reliability of rotation speed detection can be improved.

本発明の実施例を示す、図７の右端部に相当する拡大図。The enlarged view equivalent to the right end part of FIG. 7 which shows the Example of this invention. カバーと外輪のみを取り出して示す、図１の上半部の右側から見た図。The figure seen from the right side of the upper half part of FIG. 1 which shows only a cover and an outer ring. 図２のＸ部拡大矢視図。FIG. センサホルダを示しており、（Ａ）は側面図、（Ｂ）は（Ａ）の左から見た図。The sensor holder is shown, (A) is a side view, (B) is the figure seen from the left of (A). 本発明を実施する場合に採用できる、エンコーダの取付部の他の構造の第１例を示す部分断面図。The fragmentary sectional view which shows the 1st example of the other structure of the attachment part of an encoder which can be employ | adopted when implementing this invention. 同第２例を示す部分断面図。The fragmentary sectional view which shows the 2nd example. 従来構造の１例を示す断面図。Sectional drawing which shows an example of a conventional structure.

符号の説明Explanation of symbols

１ 外輪
２ ハブ
３ 内輪
４ 結合フランジ
５ａ、５b 外輪軌道
６ 取付フランジ
７ａ、７ｂ 内輪軌道
８ 小径段部
９ かしめ部
１０ 転動体
１１ シールリング
１２、１２ａ、１２ｂ、１２ｃ エンコーダ
１３、１３ａ、１３ｂ、１３ｃ 支持環
１４、１４ｂ、１４ｃ 円輪部
１５、１５ｂ、１５ｃ エンコーダ本体
１６、１６ａ カバー
１７、１７ａ 本体
１８ 嵌合筒
１９ Ｏリング
２０、２０ａ 底板部
２１ 突部
２２、２２ａ 挿入孔
２３ ナット
２４ ねじ孔
２５、２５ａ センサホルダ
２６、２６ａ 挿入部
２７、２７ａ 取付フランジ部
２８ 係止溝
２９ Ｏリング
３０ ハーネス
３１ 通孔
３２ 補強環
３３ ボルト
３４ 第一の凹溝
３５ 第二の凹溝
３６ 突起
３７ 円筒部 DESCRIPTION OF SYMBOLS 1 Outer ring 2 Hub 3 Inner ring 4 Coupling flange 5a, 5b Outer ring raceway 6 Mounting flange 7a, 7b Inner ring raceway 8 Small diameter step part 9 Caulking part 10 Rolling element 11 Seal ring 12, 12a, 12b, 12c Encoder 13, 13a, 13b, 13c Support ring 14, 14b, 14c Ring part 15, 15b, 15c Encoder body 16, 16a Cover 17, 17a body 18 Fitting cylinder 19 O-ring 20, 20a Bottom plate part 21 Projection part 22, 22a Insertion hole 23 Nut 24 Screw hole 25, 25a Sensor holder 26, 26a Insertion part 27, 27a Mounting flange part 28 Locking groove 29 O-ring 30 Harness 31 Through hole 32 Reinforcement ring 33 Bolt 34 First concave groove 35 Second concave groove 36 Projection 37 Cylindrical part

Claims (2)

静止側周面に静止側軌道を有し、使用時にも回転しない静止輪と、回転側周面に回転側軌道を有し、使用時に回転する回転輪と、上記静止側軌道と上記回転側軌道との間に転動自在に設けられた複数個の転動体と、上記回転輪に嵌合固定されたエンコーダと、上記静止輪に結合固定されたカバーと、このカバーに支持された、上記エンコーダに対向させたセンサを保持したセンサホルダとを備え、このセンサホルダは、上記カバーの一部に形成した挿入孔を通じてこのカバーの内側に挿入した、上記センサを保持した挿入部と、この挿入部の外周面に全周に亙り形成した係止溝に係止され、この係止溝の底面と上記挿入孔の内周面との間で弾性的に圧縮されたＯリングと、上記挿入部の基端部に設けられて、側面を上記カバーの外面に当接させた取付フランジ部と、この取付フランジ部の一部を貫通する状態で設けられた通孔とを有するものであり、上記カバーの一部でこの通孔と整合する部分にはねじ孔を、直接又は別体の部材を介して設けており、上記センサホルダは、上記通孔に挿通したボルトを上記ねじ孔に螺合させる事に基づいて上記カバーに結合されている回転速度検出装置付転がり軸受ユニットに於いて、上記挿入孔の内周面に挿入孔側係合部を設けると共に、上記挿入部の外周面に、この挿入部を上記挿入孔に挿入すると共に上記取付フランジ部の側面を上記カバーの外面に当接させた場合にのみ上記挿入部を回転させる事に基づいて上記挿入孔側係合部に係脱する事ができる挿入部側係合部を設けた事を特徴とする回転速度検出装置付転がり軸受ユニット。   A stationary wheel having a stationary side track on the stationary side circumferential surface and not rotating during use, a rotating wheel having a rotational side track on the rotating side circumferential surface and rotating during use, the stationary side track and the rotating side track A plurality of rolling elements provided so as to be able to roll between, an encoder fitted and fixed to the rotating wheel, a cover coupled and fixed to the stationary wheel, and the encoder supported by the cover A sensor holder that holds a sensor facing the sensor, and the sensor holder is inserted inside the cover through an insertion hole formed in a part of the cover, the insertion part holding the sensor, and the insertion part. An O-ring which is locked to a locking groove formed over the entire circumference on the outer peripheral surface of the inner ring and is elastically compressed between the bottom surface of the locking groove and the inner peripheral surface of the insertion hole; Provided at the base end, with the side face abutting against the outer surface of the cover And a through hole provided in a state of penetrating a part of the mounting flange, and a screw hole is directly formed in a part of the cover that is aligned with the through hole. Alternatively, the sensor holder is provided via a separate member, and the sensor holder is a rolling bearing with a rotational speed detection device coupled to the cover based on screwing a bolt inserted into the through hole into the screw hole. In the unit, an insertion hole side engagement portion is provided on the inner peripheral surface of the insertion hole, and the insertion portion is inserted into the insertion hole and the side surface of the mounting flange portion is disposed on the outer peripheral surface of the insertion portion. Rotation characterized by providing an insertion portion side engagement portion that can be engaged with and disengaged from the insertion hole side engagement portion based on rotation of the insertion portion only when contacting the outer surface of the cover Rolling bearing unit with speed detector. 挿入孔の内周面に、一端をカバーの外面に開口させた状態で軸方向に形成された第一の凹溝と、一端をこの第一の凹溝に開口させた状態で円周方向に形成された第二の凹溝とを設け、このうちの第二の凹溝を挿入孔側係合部とし、更に、挿入部の外周面の一部に、この挿入部を上記挿入孔の内側に挿入する事に基づいて上記第一の凹溝内に進入させる事ができ、且つ、上記挿入部を上記挿入孔に挿入すると共に取付フランジ部の側面を上記カバーの外面に当接させた場合にのみ、上記挿入部を回転させる事に基づいて上記第二の凹溝に係脱する事ができる突起を設け、この突起を挿入部側係合部とした、請求項１に記載した回転速度検出装置付転がり軸受ユニット。   A first concave groove formed in the axial direction with one end opened on the outer surface of the cover on the inner circumferential surface of the insertion hole, and a circumferential direction with one end opened in the first concave groove A second groove is formed, and the second groove is used as an insertion hole side engaging portion, and the insertion portion is formed on the inner side of the insertion hole on a part of the outer peripheral surface of the insertion portion. When the insertion portion is inserted into the insertion hole and the side surface of the mounting flange portion is brought into contact with the outer surface of the cover The rotation speed according to claim 1, wherein a protrusion that can be engaged with and disengaged from the second concave groove on the basis of the rotation of the insertion portion is provided, and the protrusion serves as an insertion portion side engagement portion. Rolling bearing unit with detector.
JP2004186150A 2004-06-24 2004-06-24 Rolling bearing unit with rotational speed detector Pending JP2006009889A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009149121A (en) * 2007-12-18 2009-07-09 Ntn Corp Wheel bearing device with rotation speed detection device
JP2015045605A (en) * 2013-08-29 2015-03-12 日立金属株式会社 Rotation detection device, and wheel bearing device
CN109689396A (en) * 2016-09-12 2019-04-26 Ntn株式会社 Bearing device for wheel
EP3885594A1 (en) 2020-03-27 2021-09-29 Nakanishi Metal Works Co., Ltd. Sensor cap nut and sensor cap

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009149121A (en) * 2007-12-18 2009-07-09 Ntn Corp Wheel bearing device with rotation speed detection device
JP2015045605A (en) * 2013-08-29 2015-03-12 日立金属株式会社 Rotation detection device, and wheel bearing device
CN109689396A (en) * 2016-09-12 2019-04-26 Ntn株式会社 Bearing device for wheel
CN109689396B (en) * 2016-09-12 2022-07-29 Ntn株式会社 Bearing device for wheel
EP3885594A1 (en) 2020-03-27 2021-09-29 Nakanishi Metal Works Co., Ltd. Sensor cap nut and sensor cap
US11454641B2 (en) 2020-03-27 2022-09-27 Nakanishi Metal Works Co., Ltd. Sensor cap nut and sensor cap

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