JP2005233290A - Bearing device with sensor - Google Patents

Bearing device with sensor Download PDF

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JP2005233290A
JP2005233290A JP2004042531A JP2004042531A JP2005233290A JP 2005233290 A JP2005233290 A JP 2005233290A JP 2004042531 A JP2004042531 A JP 2004042531A JP 2004042531 A JP2004042531 A JP 2004042531A JP 2005233290 A JP2005233290 A JP 2005233290A
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sensor
bearing
bearing device
hole
outer ring
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JP4259346B2 (en
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Ikunori Sakatani
郁紀 坂谷
Toshio Suzuki
寿雄 鈴木
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NSK Ltd
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NSK Ltd
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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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • 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
    • F16C2326/10—Railway vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device fitted with a sensor having high reliability capable of preventing the outer ring of its bearing from rotating relative to a bearing box owing to a shock, creep, etc. and preventing the sensor cables from breaking. <P>SOLUTION: The bearing device 10 fitted with the sensor has the outer ring 15 provided with hole 30 at its peripheral surface 29, and the tip 31 of a male threaded member 25 engaged with the bearing box 12 is fitted in the hole 30. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、センサ付軸受装置に関し、特に、機械装置や、鉄道車両、自動車、搬送車等の移動体に組み込まれる軸受装置の運転状態の検知や予防保全に用いられるセンサ付軸受装置に関する。   The present invention relates to a sensor-equipped bearing device, and more particularly, to a sensor-equipped bearing device used for detection of an operating state of a bearing device incorporated in a moving body such as a mechanical device or a railway vehicle, an automobile, a transport vehicle, or preventive maintenance.

従来のセンサ付軸受装置の一例として、封止インサートにセンサを固定したセンサ付軸受装置が知られている（例えば、特許文献１参照）。   As an example of a conventional sensor-equipped bearing device, a sensor-equipped bearing device in which a sensor is fixed to a sealing insert is known (for example, see Patent Document 1).

図２に示すように、特許文献１に開示されたセンサ付軸受装置１００は、軸受(不図示)の外輪(不図示)上に封止インサート１０１が圧接され、封止インサート１０１上に、加速度計デバイスを含んだセンサ本体１０２と、運動センサや回転センサを組み込んだセンサ本体１０３とが、異なる位置に搭載されている。センサ本体１０２，１０３は、ケーブル１０４を通じて、ハウジング１０５上に搭載された多ピン型コネクタ１０６に接続されている。   As shown in FIG. 2, in the sensor-equipped bearing device 100 disclosed in Patent Document 1, a sealing insert 101 is pressed against an outer ring (not shown) of a bearing (not shown), and an acceleration is applied on the sealing insert 101. A sensor main body 102 including a measuring device and a sensor main body 103 incorporating a motion sensor and a rotation sensor are mounted at different positions. The sensor bodies 102 and 103 are connected to a multi-pin connector 106 mounted on a housing 105 through a cable 104.

センサ付軸受装置１００では、センサ本体１０２，１０３が軸受の負荷圏内に配されており、一方のセンサ１０２内には、回転軸に垂直な方向の振動を測定する加速度計と、回転軸の軸方向の振動を測定する加速度計とが設けられている。
特表２００２−５４２９７３号公報（第６−８頁、第１図） In the sensor-equipped bearing device 100, the sensor main bodies 102 and 103 are arranged within the load range of the bearing. In one sensor 102, an accelerometer that measures vibration in a direction perpendicular to the rotation axis, and an axis of the rotation axis An accelerometer that measures directional vibrations is provided.
JP 2002-542773 A (page 6-8, FIG. 1)

ところで、上記特許文献１では、センサ本体１０２，１０３は軸受の外輪に圧接された封止インサート１０１に取り付けられているため、軸受の外輪が衝撃やクリープ等でハウジング１０５に対して回転すると、ケーブル１０４が破断する等のおそれがあった。また、特許文献１は無線送信による送信について開示しているが、無線送信の設備は高価であると共に、信号の信頼性が乏しい。このため、ケーブルを用いて送信する従来の方法においてケーブルの破断に対する改善が望まれている。   By the way, in Patent Document 1, since the sensor bodies 102 and 103 are attached to the sealing insert 101 pressed against the outer ring of the bearing, when the outer ring of the bearing rotates with respect to the housing 105 due to impact or creep, the cable There was a risk that 104 would break. Moreover, although patent document 1 is disclosing about the transmission by radio | wireless transmission, the equipment of radio | wireless transmission is expensive, and the reliability of a signal is scarce. For this reason, the improvement with respect to the fracture | rupture of a cable is desired in the conventional method of transmitting using a cable.

本発明は、上記事情に鑑みてなされたものであって、その目的は、軸受の外輪が衝撃やクリープ等で軸受箱に対して回転することがなく、センサのケーブルが破断することが防止でき、信頼性の高いセンサ付軸受装置を提供することにある。   The present invention has been made in view of the above circumstances, and its purpose is to prevent the outer ring of the bearing from rotating with respect to the bearing housing due to impact, creep, or the like, and to prevent the sensor cable from being broken. Another object of the present invention is to provide a highly reliable bearing device with a sensor.

本発明の上記目的は、以下の構成により達成される。
（１） 軸部材に取り付けられる内輪と、軸受箱に取り付けられる外輪と、前記内輪と前記外輪との間に配置された複数の転動体とを備えた軸受と、前記軸受の状態を監視するセンサとを備えたセンサ付軸受装置であって、
前記外輪の外周面には孔が形成されており、該孔には、前記軸受箱にねじ止めされた雄ねじ部材の先端部が嵌め合わされることを特徴とするセンサ付軸受装置。
（２） 前記孔に嵌め合わされる前記雄ねじ部材の先端部には、ねじが形成されていないことを特徴とする（１）に記載のセンサ付軸受装置。
（３） 前記孔は、軸方向に長軸を有する楕円孔であることを特徴とする（１）又は（２）に記載のセンサ付軸受装置。
（４） 前記孔は、前記雄ねじ部材の直径に前記外輪の遊び代を加えた大きさ以上の直径を有する円孔であることを特徴とする（１）又は（２）に記載のセンサ付軸受装置。
（５） 前記センサは、前記軸受の状態を監視する検出素子と、該検出素子を内包するセンサ筐体とを備え、前記センサ筐体は、前記軸受のシール部材に取り付けられることを特徴とする（１）〜（４）のいずれかに記載のセンサ付軸受装置。
（６） 前記軸受は、軸受内部への異物侵入を防止するためのシール手段を備え、該シール手段はラビリンスシールであることを特徴とする（１）〜（５）のいずれかに記載のセンサ付軸受装置。
（７） 前記センサは、速度検出素子、温度検出素子、振動検出素子の少なくとも一つを含むことを特徴とする（１）〜（６）のいずれかに記載のセンサ付軸受装置。
（８） 前記センサ付軸受装置は、鉄道車両用センサ付軸受装置であることを特徴とする（１）〜（７）のいずれかに記載のセンサ付軸受装置。 The above object of the present invention is achieved by the following configurations.
(1) A bearing provided with an inner ring attached to the shaft member, an outer ring attached to the bearing housing, and a plurality of rolling elements arranged between the inner ring and the outer ring, and a sensor for monitoring the state of the bearing A sensor-equipped bearing device comprising:
A sensor-equipped bearing device, wherein a hole is formed in an outer peripheral surface of the outer ring, and a leading end portion of a male screw member screwed to the bearing box is fitted into the hole.
(2) The sensor-equipped bearing device according to (1), wherein a screw is not formed at a distal end portion of the male screw member fitted into the hole.
(3) The sensor-equipped bearing device according to (1) or (2), wherein the hole is an elliptical hole having a long axis in an axial direction.
(4) The sensor-equipped bearing according to (1) or (2), wherein the hole is a circular hole having a diameter equal to or larger than a diameter of the male screw member plus a play allowance of the outer ring. apparatus.
(5) The sensor includes a detection element that monitors a state of the bearing, and a sensor casing that includes the detection element, and the sensor casing is attached to a seal member of the bearing. The sensor-equipped bearing device according to any one of (1) to (4).
(6) The sensor according to any one of (1) to (5), wherein the bearing includes seal means for preventing foreign matter from entering the bearing, and the seal means is a labyrinth seal. Bearing device.
(7) The sensor-equipped bearing device according to any one of (1) to (6), wherein the sensor includes at least one of a speed detection element, a temperature detection element, and a vibration detection element.
(8) The sensor-equipped bearing device according to any one of (1) to (7), wherein the sensor-equipped bearing device is a railcar-equipped sensor-equipped bearing device.

本発明のセンサ付軸受装置によれば、外輪の外周面に孔が形成され、該孔に軸受箱にねじ止めされた雄ねじ部材の先端部が収容されているので、外輪が衝撃やクリープ等で軸受箱に対して回転することがない。その結果、センサのケーブルが破断することが防止され、信頼性の高いセンサ付軸受装置を提供することができる。   According to the sensor-equipped bearing device of the present invention, a hole is formed in the outer peripheral surface of the outer ring, and the tip of the male screw member screwed to the bearing box is accommodated in the hole. There is no rotation with respect to the bearing housing. As a result, the sensor cable is prevented from being broken, and a highly reliable bearing device with a sensor can be provided.

以下、本発明の実施形態に係るセンサ付軸受装置を図面に基づいて詳細に説明する。   Hereinafter, a sensor-equipped bearing device according to an embodiment of the present invention will be described in detail with reference to the drawings.

（第１実施形態）
図１は本発明の実施形態に係るセンサ付軸受装置を示す断面図である。図１に示すように、本発明の実施形態であるセンサ付軸受装置１０は、鉄道車両用センサ付軸受装置であり、本発明の軸部材である車軸１１が、図示しない車輪を支持固定した状態で、軸受箱１２の内径側で、複列円すいころ軸受１３により、回転自在に支持されている。 (First embodiment)
FIG. 1 is a cross-sectional view showing a sensor-equipped bearing device according to an embodiment of the present invention. As shown in FIG. 1, a sensor-equipped bearing device 10 according to an embodiment of the present invention is a railcar-equipped sensor-equipped bearing device, and an axle 11 that is a shaft member of the present invention supports and fixes a wheel (not shown). Thus, it is rotatably supported by the double row tapered roller bearing 13 on the inner diameter side of the bearing housing 12.

複列円すいころ軸受１３には、種々部材の重量等によるラジアル荷重と任意のアキシアル荷重とが負荷される。複列円すいころ軸受１３は、軸受箱１２に取り付けられ、円錐外面状に傾斜した一対の外輪軌道面１４（片方の外輪軌道面は図示しない。）を内周面に有する単一の外輪１５と、車軸１１に取り付けられ、円錐外面状に傾斜した内輪軌道面１６（片方の内輪軌道面は図示しない。）を外周面に有する一対の内輪１７（片方の内輪は図示しない。）を有する。   The double row tapered roller bearing 13 is loaded with a radial load due to the weight of various members and an arbitrary axial load. The double row tapered roller bearing 13 is attached to the bearing housing 12 and has a single outer ring 15 having a pair of outer ring raceway surfaces 14 (one outer ring raceway surface is not shown) inclined on the outer circumferential surface of the cone. And a pair of inner rings 17 (one inner ring is not shown) having an inner ring raceway surface 16 (one inner ring raceway surface is not shown) attached to the axle 11 and inclined in a conical outer surface shape.

また、複列円すいころ軸受１３は、外輪１５の外輪軌道面１４と内輪１７の内輪軌道面１６との間に複列で複数配置された転動体である円すいころ１８と、円すいころ１８を転動自在に保持する環状の打ち抜き保持器１９（片方の保持器は図示しない。）とを有する。複列円すいころ軸受１３の内部には、グリース等の潤滑剤が封入されている。   Further, the double row tapered roller bearing 13 rolls the tapered rollers 18 and the tapered rollers 18 which are rolling elements arranged in multiple rows between the outer ring raceway surface 14 of the outer ring 15 and the inner ring raceway surface 16 of the inner ring 17. An annular punching retainer 19 (one retainer is not shown) is provided to be held movably. Inside the double-row tapered roller bearing 13, a lubricant such as grease is sealed.

一対の内輪１７間には、内輪間座２０が配されており、内輪間座２０と反対側の内輪１７の軸方向端部にも、内輪間座２１が配されている。また、内輪間座２１の端部には、センサの一部を構成する円環状の速度検出用ギア部材２２が車軸１１に螺合固定されている。さらに、速度検出用ギア部材２２の側部には、カバー２３がボルト２４によって固定されている。   An inner ring spacer 20 is disposed between the pair of inner rings 17, and an inner ring spacer 21 is also disposed at the axial end of the inner ring 17 on the side opposite to the inner ring spacer 20. An annular speed detecting gear member 22 constituting a part of the sensor is screwed and fixed to the axle 11 at the end of the inner ring spacer 21. Further, a cover 23 is fixed to the side portion of the speed detection gear member 22 by a bolt 24.

また、外輪１５は、軸受箱１２の非負荷圏側にねじ止めされた雄ねじ部材２５によって回り止めされている。軸受箱１２には、周面に雌ねじ２６が加工された貫通孔２７が設けられており、雄ねじ部材２５は、外周面に形成された雄ねじ部２８を雌ねじ２６と螺合させることで、軸受箱１２にねじ止めされている。また、外輪１５の外周面２９には盲孔３０が形成されており、この盲孔３０には、雄ねじ部材２５の先端部３１が挿入されて嵌め合わされている。これにより、外輪１５が衝撃やクリープ等で軸受箱１２に対して回転することが防止される。   The outer ring 15 is prevented from rotating by a male screw member 25 screwed to the non-load zone side of the bearing housing 12. The bearing box 12 is provided with a through hole 27 in which a female screw 26 is processed on the peripheral surface, and the male screw member 25 is engaged with the female screw 26 by screwing a male screw portion 28 formed on the outer peripheral surface. 12 is screwed. Further, a blind hole 30 is formed in the outer peripheral surface 29 of the outer ring 15, and a distal end portion 31 of the male screw member 25 is inserted into and fitted into the blind hole 30. This prevents the outer ring 15 from rotating with respect to the bearing housing 12 due to impact, creep, or the like.

雄ねじ部材２５の先端部３１は、雄ねじ部材２５の雄ねじ部２８の谷よりも小径に加工されており、ねじが形成されていない。先端部３１にねじが形成されている場合には、外輪１５が雄ねじ部材２５に衝突すると、先端部のねじ山が潰れて、雄ねじ部材２５を軸受箱１２から取り外せなくなったり、取り外す際に軸受箱１２の雌ねじ２６を破損したりすることがあるが、本実施形態では、先端部３１にねじが形成されていないので、衝突によるねじ山の破損はなく、雄ねじ部材２５の取り外しが容易にできる。   The distal end portion 31 of the male screw member 25 is processed to have a smaller diameter than the valley of the male screw portion 28 of the male screw member 25, and no screw is formed. When a screw is formed at the tip 31, when the outer ring 15 collides with the male screw member 25, the screw thread at the tip is crushed so that the male screw member 25 cannot be removed from the bearing box 12, or the bearing box In this embodiment, since the screw is not formed at the distal end portion 31, there is no damage to the thread due to the collision, and the male screw member 25 can be easily removed.

盲孔３０は、車軸１１の軸方向に長軸を有する楕円孔とするか、雄ねじ部材２５の直径に外輪１５の遊び代を足した大きさ以上の直径を有する円孔とし、雄ねじ部材２５と盲孔３０との間には車軸１１の軸方向に隙間が設けられている。このため、車両がカーブ等に進入した際、外輪１５に軸方向荷重が作用して外輪１５が軸方向に移動しても、外輪１５は雄ねじ部材２５と接触することがない。よって、雄ねじ部材２５が破損されることが防止され、回り止めの信頼性を向上することができる。なお、雄ねじ部材２５は軸受箱１２の非負荷圏側に設けたが負荷圏側でもよい。また、軸受箱１２が二つ割り構造の軸受箱からなる場合は、非負荷圏側に設けた方が作業性に優れる。   The blind hole 30 is an elliptical hole having a long axis in the axial direction of the axle 11 or a circular hole having a diameter equal to or larger than the diameter of the male screw member 25 plus the allowance for the outer ring 15. A gap is provided between the blind hole 30 in the axial direction of the axle 11. For this reason, when the vehicle enters a curve or the like, even if an axial load is applied to the outer ring 15 and the outer ring 15 moves in the axial direction, the outer ring 15 does not contact the male screw member 25. Therefore, the male screw member 25 is prevented from being damaged, and the reliability of the rotation stopper can be improved. The male screw member 25 is provided on the non-load zone side of the bearing housing 12 but may be on the load zone side. In addition, when the bearing box 12 is composed of a split bearing box, the workability is better if it is provided on the non-load zone side.

また、外輪１５の端部には、鉄製のシール部材３２が組付けられている。シール部材３２には、径方向内方に延びるフランジ部３３の先端部に、フランジ部３３に対してほぼ９０度に折曲された筒状のシール板部３４が形成されている。また、内輪間座２１の外周面には、所定の隙間をもってシール板部３４を囲むように形成されたシール凹部３５が設けられている。従って、シール板部３４を有するシール部材３２とシール凹部３５を有する内輪間座２１は、円すいころ軸受１３内部への異物侵入を防止するためのシール手段であるラビリンスシール３６を構成する。   Further, an iron seal member 32 is assembled to the end of the outer ring 15. The seal member 32 is formed with a cylindrical seal plate portion 34 that is bent at approximately 90 degrees with respect to the flange portion 33 at the distal end portion of the flange portion 33 that extends radially inward. In addition, a seal concave portion 35 is provided on the outer peripheral surface of the inner ring spacer 21 so as to surround the seal plate portion 34 with a predetermined gap. Therefore, the seal member 32 having the seal plate portion 34 and the inner ring spacer 21 having the seal recess 35 constitute a labyrinth seal 36 that is a seal means for preventing foreign matter from entering the tapered roller bearing 13.

シール部材３２には、円すいころ軸受１３の状態を監視するセンサ３７が取り付けられている。センサ３７は、円すいころ軸受１３の状態を監視する検出素子として、速度検出素子３８、温度検出素子３９、振動検出素子４０と、これらの検出素子３８，３９，４０を内包するセンサ筐体４１とを備える。   A sensor 37 for monitoring the state of the tapered roller bearing 13 is attached to the seal member 32. The sensor 37 is a speed detection element 38, a temperature detection element 39, a vibration detection element 40, and a sensor housing 41 containing these detection elements 38, 39, and 40 as detection elements for monitoring the state of the tapered roller bearing 13. Is provided.

センサ筐体４１は、シール部材３２の内側に設けた雌ねじ部材４２を用いて、シール部材３２のフランジ部３３を挟み込むようにしてシール部材３２に取り付けられている。雌ねじ部材４２には、複数のねじ孔４３が形成されており、フランジ部３３に形成された挿通孔４４とセンサ筐体４１に形成された挿通孔４５を介して複数のボルト４６がねじ込まれている。なお、雌ねじ部材４２に複数のねじ孔４３を設けることで、雌ねじ部材４２の脱落を防止している。なお、シール部材３２に雄ねじを固定し、その雄ねじを使用してセンサ筐体４１を固定してもよい。   The sensor housing 41 is attached to the seal member 32 using a female screw member 42 provided inside the seal member 32 so as to sandwich the flange portion 33 of the seal member 32. A plurality of screw holes 43 are formed in the female screw member 42, and a plurality of bolts 46 are screwed through an insertion hole 44 formed in the flange portion 33 and an insertion hole 45 formed in the sensor housing 41. Yes. The female screw member 42 is provided with a plurality of screw holes 43 to prevent the female screw member 42 from falling off. Alternatively, a male screw may be fixed to the seal member 32 and the sensor housing 41 may be fixed using the male screw.

センサ筺体４１は、アルミニウム合金製のものからなり、底部４７にセンサ孔４８が形成され、上部開口はカバー４９により密閉されている。センサ筐体４１とフランジ部３３との間の隙間には、シリコン樹脂５０が充填されており、鉄製のシール部材３２とアルミニウム合金製のセンサ筐体４１間の取付け面の隙間部分に水分が浸入するのを防ぎ、アルミニウムと鉄の基準電位の差に基づくアルミニウム合金の溶出を防止している。   The sensor housing 41 is made of an aluminum alloy, a sensor hole 48 is formed in the bottom 47, and the upper opening is sealed by a cover 49. The gap between the sensor housing 41 and the flange portion 33 is filled with silicon resin 50, and moisture enters the gap portion of the mounting surface between the iron seal member 32 and the aluminum alloy sensor housing 41. This prevents the elution of the aluminum alloy based on the difference in the reference potential between aluminum and iron.

速度検出素子３８、温度検出素子３９、振動検出素子４０は、センサ筐体４１に設けられた基板５１に固定されており、円すいころ軸受１３の状態を高精度に検出する。   The speed detection element 38, the temperature detection element 39, and the vibration detection element 40 are fixed to a substrate 51 provided in the sensor housing 41, and detect the state of the tapered roller bearing 13 with high accuracy.

速度検出素子３８は、速度検出用ギア部材２２に非接触にして、センサ筐体４１のセンサ孔４８内に配されており、車軸１１に固定された速度検出用ギア部材２２の回転を検出することによって車軸１１の回転を計測しており、例えばパルス状の電気信号を発生する。発生した電気信号は、制御回路（不図示）に送られて監視される。   The speed detection element 38 is disposed in the sensor hole 48 of the sensor housing 41 so as not to contact the speed detection gear member 22, and detects the rotation of the speed detection gear member 22 fixed to the axle 11. Thus, the rotation of the axle 11 is measured, and for example, a pulsed electric signal is generated. The generated electrical signal is sent to a control circuit (not shown) and monitored.

温度検出素子３９は、センサ筐体４１の円すいころ軸受１３に近い、シール部材３２側に配されており、シール部材３２を介して伝達される円すいころ軸受内部の雰囲気温度を常時測定して制御回路に与えることにより、潤滑材切れ等による焼付きの発生を防止する。このとき、シール手段として、非接触のシールであるラビリンスシール３６を用いているため発熱がなく、円すいころ軸受１３の発熱を精度良く測定することができる。また、温度検出素子３９を他の検出素子よりシール部材側に配しているので、シール部材３２の温度をより正確に測定できる。   The temperature detection element 39 is disposed on the seal member 32 side of the sensor housing 41 close to the tapered roller bearing 13, and constantly controls and controls the ambient temperature inside the tapered roller bearing transmitted through the seal member 32. By giving it to the circuit, seizure due to running out of the lubricant is prevented. At this time, since the labyrinth seal 36 which is a non-contact seal is used as the sealing means, there is no heat generation, and the heat generation of the tapered roller bearing 13 can be accurately measured. In addition, since the temperature detection element 39 is arranged on the seal member side with respect to the other detection elements, the temperature of the seal member 32 can be measured more accurately.

振動検出素子４０は、円すいころ１８、外輪１５、内輪１６に与えられた振動成分を電気信号に変換して制御回路に送ることにより共振等の検出を行う。   The vibration detecting element 40 detects a resonance or the like by converting a vibration component given to the tapered roller 18, the outer ring 15 and the inner ring 16 into an electric signal and sending it to a control circuit.

尚、センサ筐体４１からは、速度検出素子３８，温度検出素子３９，振動検出素子４０から出力された測定信号を外部に伝送するためにケーブル（不図示）が引き出されているが、外輪１５に回り止めが施されていることにより、外輪１５がクリープ等で実質的に回転することがないので、ケーブルを破断することが無くなり、センサ付軸受装置１０の信頼性を向上できる。   A cable (not shown) is drawn from the sensor casing 41 to transmit the measurement signals output from the speed detection element 38, the temperature detection element 39, and the vibration detection element 40 to the outside. Since the outer ring 15 is not substantially rotated by creep or the like, the cable is not broken and the reliability of the sensor-equipped bearing device 10 can be improved.

上述したように、本実施形態のセンサ付軸受装置１０によれば、外輪１５の外周面には盲孔３０が形成されており、盲孔３０には、軸受箱１２にねじ止めされた雄ねじ部材２５の先端部３１が嵌め合わされるので、外輪１５が衝撃やクリープ等で軸受箱１２に対して実質的に回転することがない。その結果、センサ３７のケーブルが破断することが防止され、信頼性の高いセンサ付軸受装置１０を提供することができる。   As described above, according to the sensor-equipped bearing device 10 of the present embodiment, the blind hole 30 is formed in the outer peripheral surface of the outer ring 15, and the male screw member screwed to the bearing box 12 is formed in the blind hole 30. Since the front end portions 31 of 25 are fitted together, the outer ring 15 does not substantially rotate with respect to the bearing housing 12 due to impact, creep, or the like. As a result, the cable of the sensor 37 is prevented from being broken, and the highly reliable bearing device with sensor 10 can be provided.

また、盲孔３０に嵌め合わされる雄ねじ部材２５の先端部３１には、ねじが形成されていないので、外輪１５が雄ねじ部材２５と衝突しても、衝突によるねじ山の破損はなく、雄ねじ部材２５の取り外しが容易にできる。   Further, since no screw is formed at the distal end portion 31 of the male screw member 25 fitted in the blind hole 30, even if the outer ring 15 collides with the male screw member 25, the thread is not damaged by the collision, and the male screw member 25 can be easily removed.

また、盲孔３０は、軸方向に長軸を有する楕円孔か、雄ねじ部材２５の直径に外輪１５の遊び代を加えた大きさ以上の直径を有する円孔としているので、車両がカーブ等に進入して、外輪１５に軸方向荷重が作用して、外輪１５が軸方向に移動しても、外輪１５は雄ねじ部材２５と接触せず、回り止めを破損することは無く、回り止めの信頼性を向上することができる。   The blind hole 30 is an elliptical hole having a long axis in the axial direction, or a circular hole having a diameter larger than the diameter of the male screw member 25 plus the allowance for the outer ring 15, so that the vehicle is curved or the like. Even if the outer ring 15 enters and the outer ring 15 moves in the axial direction due to an axial load, the outer ring 15 does not come into contact with the male screw member 25, and the rotation stopper is not damaged. Can be improved.

なお、本発明は、前述した各実施形態に限定されるものではなく、適宜、変形、改良等が可能である。
本実施形態では、外輪の外周面に盲孔を設けたが、貫通孔であってもよい。ただし、軸受内部のグリースが漏れたり、軸受内部にゴミ等の異物が侵入する可能性がある場合には、盲孔を設けるほうが好ましい。
軸受は、複列円すいころ軸受に限らず、その他、例えば、深溝玉軸受、アンギュラ玉軸受、円筒ころ軸受等の各種転がり軸受を適用しても良く、また、単列軸受であっても複列軸受であってもよい。
また、センサに内蔵される検出素子は特に限定されず、軸受の状態を高い精度で監視する上で、速度検出素子、温度検出素子、加速度検出素子の少なくとも一つを含んでいることが望ましい。 In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
In this embodiment, the blind hole is provided on the outer peripheral surface of the outer ring, but it may be a through hole. However, when there is a possibility that grease inside the bearing leaks or foreign matter such as dust enters the inside of the bearing, it is preferable to provide a blind hole.
The bearings are not limited to double row tapered roller bearings, and various other rolling bearings such as deep groove ball bearings, angular ball bearings, and cylindrical roller bearings may be applied. It may be a bearing.
Further, the detection element built in the sensor is not particularly limited, and it is desirable to include at least one of a speed detection element, a temperature detection element, and an acceleration detection element in order to monitor the state of the bearing with high accuracy.

本発明の実施形態に係るセンサ付軸受装置を示す断面図である。It is sectional drawing which shows the bearing apparatus with a sensor which concerns on embodiment of this invention. 従来のセンサ付軸受装置の断面図である。It is sectional drawing of the conventional bearing apparatus with a sensor.

符号の説明Explanation of symbols

１０ センサ付軸受装置
１１ 車軸（軸部材）
１２ 軸受箱
１３ 円すいころ軸受（軸受）
１５ 外輪
１７ 内輪
２５ 雄ねじ部材
３０ 盲孔（孔）
３１ 先端部
３２ シール部材
３６ ラビリンスシール
３７ センサ
３８ 速度検出素子（検出素子）
３９ 温度検出素子（検出素子）
４０ 振動検出素子（検出素子）
４１ センサ筐体 10 Bearing device with sensor 11 Axle (shaft member)
12 Bearing box 13 Tapered roller bearing (bearing)
15 Outer ring 17 Inner ring 25 Male thread member 30 Blind hole (hole)
31 Tip 32 Seal member 36 Labyrinth seal 37 Sensor 38 Speed detection element (detection element)
39 Temperature detection element (detection element)
40 Vibration detection element (detection element)
41 Sensor housing

Claims (8)

軸部材に取り付けられる内輪と、軸受箱に取り付けられる外輪と、前記内輪と前記外輪との間に配置された複数の転動体とを備えた軸受と、前記軸受の状態を監視するセンサとを備えたセンサ付軸受装置であって、
前記外輪の外周面には孔が形成されており、該孔には、前記軸受箱にねじ止めされた雄ねじ部材の先端部が嵌め合わされることを特徴とするセンサ付軸受装置。 A bearing provided with an inner ring attached to the shaft member, an outer ring attached to the bearing housing, a plurality of rolling elements disposed between the inner ring and the outer ring, and a sensor for monitoring the state of the bearing. A bearing device with a sensor,
A sensor-equipped bearing device, wherein a hole is formed in an outer peripheral surface of the outer ring, and a leading end portion of a male screw member screwed to the bearing box is fitted into the hole. 前記孔に嵌め合わされる前記雄ねじ部材の先端部には、ねじが形成されていないことを特徴とする請求項１に記載のセンサ付軸受装置。   2. The sensor-equipped bearing device according to claim 1, wherein a screw is not formed at a distal end portion of the male screw member fitted into the hole. 前記孔は、軸方向に長軸を有する楕円孔であることを特徴とする請求項１又は２に記載のセンサ付軸受装置。   The sensor-equipped bearing device according to claim 1, wherein the hole is an elliptical hole having a long axis in an axial direction. 前記孔は、前記雄ねじ部材の直径に前記外輪の遊び代を加えた大きさ以上の直径を有する円孔であることを特徴とする請求項１又は２に記載のセンサ付軸受装置。   3. The sensor-equipped bearing device according to claim 1, wherein the hole is a circular hole having a diameter equal to or larger than a diameter of the male screw member plus a play allowance of the outer ring. 前記センサは、前記軸受の状態を監視する検出素子と、該検出素子を内包するセンサ筐体とを備え、前記センサ筐体は、前記軸受のシール部材に取り付けられることを特徴とする請求項１〜４のいずれかに記載のセンサ付軸受装置。   The sensor includes a detection element that monitors a state of the bearing and a sensor casing that includes the detection element, and the sensor casing is attached to a seal member of the bearing. The bearing apparatus with a sensor in any one of -4. 前記軸受は、軸受内部への異物侵入を防止するためのシール手段を備え、該シール手段はラビリンスシールであることを特徴とする請求項１〜５のいずれかに記載のセンサ付軸受装置。   6. The sensor-equipped bearing device according to claim 1, wherein the bearing includes a sealing unit for preventing foreign matter from entering the bearing, and the sealing unit is a labyrinth seal. 前記センサは、速度検出素子、温度検出素子、加速度検出素子の少なくとも一つを含むことを特徴とする請求項１〜６のいずれかに記載のセンサ付軸受装置。   The sensor-equipped bearing device according to claim 1, wherein the sensor includes at least one of a speed detection element, a temperature detection element, and an acceleration detection element. 前記センサ付軸受装置は、鉄道車両用センサ付軸受装置であることを特徴とする請求項１〜７のいずれかに記載のセンサ付軸受装置。   The sensor-equipped bearing device according to claim 1, wherein the sensor-equipped bearing device is a railcar-equipped sensor-equipped bearing device.
JP2004042531A 2004-02-19 2004-02-19 Bearing device with sensor for railway vehicles Expired - Fee Related JP4259346B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010133541A (en) * 2008-12-08 2010-06-17 Nsk Ltd Rolling bearing unit with sensor
US20160298690A1 (en) * 2015-04-10 2016-10-13 Aktiebolaget Skf Capped Bearing with Vibration Sensor
WO2024058199A1 (en) * 2022-09-13 2024-03-21 Ntn株式会社 Bearing device, and mechanical device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010133541A (en) * 2008-12-08 2010-06-17 Nsk Ltd Rolling bearing unit with sensor
US20160298690A1 (en) * 2015-04-10 2016-10-13 Aktiebolaget Skf Capped Bearing with Vibration Sensor
CN106050943A (en) * 2015-04-10 2016-10-26 斯凯孚公司 Capped Bearing with Vibration Sensor
US9797452B2 (en) * 2015-04-10 2017-10-24 Aktiebolaget Skf Capped bearing with vibration sensor
CN106050943B (en) * 2015-04-10 2020-04-10 斯凯孚公司 Capped bearing with vibration sensor
WO2024058199A1 (en) * 2022-09-13 2024-03-21 Ntn株式会社 Bearing device, and mechanical device

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