JP2006292027A - Rolling bearing device with sensor - Google Patents
Rolling bearing device with sensor Download PDFInfo
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- JP2006292027A JP2006292027A JP2005111597A JP2005111597A JP2006292027A JP 2006292027 A JP2006292027 A JP 2006292027A JP 2005111597 A JP2005111597 A JP 2005111597A JP 2005111597 A JP2005111597 A JP 2005111597A JP 2006292027 A JP2006292027 A JP 2006292027A
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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
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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
- 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
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/522—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
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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
- 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
Description
この発明は、転がり軸受とその各種情報を検出するセンサ装置とが一体化されたセンサ付き転がり軸受装置に関する。 The present invention relates to a rolling bearing device with a sensor in which a rolling bearing and a sensor device for detecting various information thereof are integrated.
自動車においては、その制御を行うために種々の情報が必要であることから、車体側に固定される固定側軌道部材、車輪が取り付けられる回転側軌道部材、および両部材の間に配置された二列の転動体を有するハブユニット(転がり軸受)に、センサ装置を設けることが提案されている。たとえば、特許文献1には、固定側軌道部材に磁気インピーダンスセンサを設けるとともに、回転側軌道部材に、同センサに対向する環状のパルサリングを設けることにより、回転速度を求めることが開示されている。パルサリングは、重量比で80〜98%ぐらいのフェライトをゴムに練り込み、N極とS極を交互に着磁したものとされている。
上記特許文献1のセンサ付き転がり軸受装置によると、パルサリングの製作時に、着磁という工程が必要であるほか、フェライトを大量にゴムに練り込む必要があるため、ゴム混練設備が痛みやすいという問題があり、また、着磁のS極とN極のピッチ累積誤差も大きいという問題があった。
According to the rolling bearing device with a sensor of the above-mentioned
この発明の目的は、回転側軌道部材にパルサリングを設けることなく、回転情報を得ることができるセンサ付き転がり軸受装置を提供することにある。 An object of the present invention is to provide a sensor-equipped rolling bearing device capable of obtaining rotation information without providing a pulsar ring on a rotation side raceway member.
この発明によるセンサ付き転がり軸受装置は、固定側軌道部材、回転側軌道部材および転動体を有する転がり軸受と、センサ装置とを備えているセンサ付き転がり軸受装置において、センサ装置は、固定側軌道部材の少なくとも1カ所に設けられかつ転動体荷重をエコー比として検知する超音波センサと、超音波センサの出力から回転速度を求める処理手段とを備えており、超音波センサは、所定ピッチで並ぶ複数の振動子を内部に有していることを特徴とするものである。 A rolling bearing device with a sensor according to the present invention is a rolling bearing device with a sensor provided with a rolling bearing having a stationary race member, a rotating race member and a rolling element, and a sensor device. The sensor device is a stationary race member. An ultrasonic sensor that detects a rolling element load as an echo ratio, and a processing unit that obtains a rotational speed from the output of the ultrasonic sensor. The ultrasonic sensor includes a plurality of ultrasonic sensors arranged at a predetermined pitch. It is characterized by having the above-mentioned vibrator inside.
超音波センサは、振動子から出力された超音波の反射波を受信部で受けることにより、超音波の反射エコーを求めるもので、転動体に作用する荷重が大きいと、接触面積も大きくなり、反射波は小さくなる。 The ultrasonic sensor obtains the reflected echo of the ultrasonic wave by receiving the reflected wave of the ultrasonic wave output from the vibrator, and when the load acting on the rolling element is large, the contact area becomes large, The reflected wave becomes smaller.
超音波センサの振動子は、転がり軸受と同心の円の周方向に沿って等ピッチとされていることが好ましい。また、等ピッチに代えて、隣り合う振動子の間隔を一定の増分でずらすようにしてもよい。 It is preferable that the transducers of the ultrasonic sensor have an equal pitch along the circumferential direction of a circle concentric with the rolling bearing. Further, instead of the equal pitch, the interval between adjacent vibrators may be shifted by a fixed increment.
等ピッチで並ぶ複数の振動子によると、1つの転動体が超音波センサを通過するときに、振動子の数に等しいだけの信号(パルス数信号)が出力され、これにより、分解性能が向上する。 According to a plurality of vibrators arranged at equal pitches, when one rolling element passes through the ultrasonic sensor, a signal (pulse number signal) equal to the number of vibrators is output, thereby improving the decomposition performance. To do.
転動体荷重は、例えば、以下の式で得られるエコー比から求められる。 A rolling element load is calculated | required from the echo ratio obtained by the following formula | equation, for example.
エコー比=100×(H0−H1)/H0
H0:転動体が超音波センサから半ピッチ離れたときのエコー強度
H1:転動体が超音波センサ直下に位置するときのエコー強度
超音波センサは、例えば、外周におねじ部が形成された筒状のケースおよびケース内に配置された複数の振動子を有しているものとされ、固定側軌道部材に設けられた有底のめねじ部に、ケースのおねじ部がねじ込まれることで、ケース先端に所定の予荷重が設定される。なお、固定側軌道部材がハウジング等に支持されている場合には、超音波センサをこのハウジング等に保持させて固定側軌道部材とハウジング等との接触面を臨ますようにしてもよい。
Echo ratio = 100 × (H0−H1) / H0
H0: Echo intensity when the rolling element is separated from the ultrasonic sensor by a half pitch H1: Echo intensity when the rolling element is located immediately below the ultrasonic sensor The ultrasonic sensor is, for example, a cylinder in which a screw part is formed on the outer periphery. A case-like case and a plurality of vibrators arranged in the case, and the screw portion of the case is screwed into the bottomed female screw portion provided in the stationary race member, A predetermined preload is set at the tip of the case. When the fixed-side track member is supported by a housing or the like, the ultrasonic sensor may be held by the housing or the like so that the contact surface between the fixed-side track member and the housing or the like may be faced.
回転側軌道部材が回転し、転動体がこれに伴って公転すると、超音波センサの出力は、転動体が通過するごとに大きくなる。したがって、処理手段において、この出力増減の数(パルス数)を数えるとともに、適宜な演算を行うことにより、転動体の公転速度したがって回転側軌道部材の回転速度を求めることができる。 When the rotating side raceway member rotates and the rolling element revolves along with this, the output of the ultrasonic sensor increases each time the rolling element passes. Therefore, the processing means can determine the revolution speed of the rolling element, that is, the rotational speed of the rotating side raceway member by counting the number of output increases / decreases (number of pulses) and performing an appropriate calculation.
玉軸受の玉の公転速度Ncと軌道輪の回転速度(内輪の回転速度:Ni,外輪の回転速度:Ne)との間には、玉の直径をd、玉セットのピッチ径(P.C.D.)をD、接触角をβとして、Nc={(Ne+Ni)+(Ne−Ni)dcosβ/D}/2という関係があり、これを利用することで玉の公転速度を回転側軌道部材(車輪)の回転速度に容易に変換することができる。 Between the ball revolution speed Nc of the ball bearing and the rotation speed of the race (inner ring rotation speed: Ni, outer ring rotation speed: Ne), the ball diameter is d and the ball set pitch diameter (PC .D.) Is D and contact angle is β, and there is a relationship of Nc = {(Ne + Ni) + (Ne−Ni) dcosβ / D} / 2. It can be easily converted into the rotation speed of the member (wheel).
また、転がり軸受に作用する荷重が変化すると、この荷重変化によってエコー比の大きさが変化する。エコー比と軸受に作用する荷重との関係は、予め求めておくことができるので、これを予め実験的に求めておくことにより、エコー比から転がり軸受に作用する荷重を求めることができる。したがって、処理手段に、各超音波センサの出力から転がり軸受に作用する荷重を求める荷重演算部をさらに設けておくことにより、1種類のセンサ(超音波センサ)によって、回転速度だけでなく、転がり軸受に作用する荷重を求めることもできる。 Further, when the load acting on the rolling bearing changes, the magnitude of the echo ratio changes due to this load change. Since the relationship between the echo ratio and the load acting on the bearing can be obtained in advance, the load acting on the rolling bearing can be obtained from the echo ratio by previously obtaining this relationship experimentally. Therefore, the processing means is further provided with a load calculation unit for obtaining a load acting on the rolling bearing from the output of each ultrasonic sensor, so that not only the rotation speed but also the rolling speed can be obtained by one type of sensor (ultrasonic sensor). The load acting on the bearing can also be obtained.
超音波センサの数は、1つに限定されるものではなく、所定の間隔を置いて2つ以上設けてもよい。 The number of ultrasonic sensors is not limited to one, and two or more ultrasonic sensors may be provided at a predetermined interval.
複数の振動子が等ピッチで配置されている場合に、振動子のピッチ×振動子の数=転動体の1ピッチとされていることが好ましい。転動体の1ピッチは、角度を基準としてもよく(転動体の1ピッチ=360°/転動体の数)、周方向長さを基準としてもよい(転動体の1ピッチ=転動体のP.C.D./転動体の数)。 When a plurality of vibrators are arranged at an equal pitch, it is preferable that the pitch of the vibrators × the number of vibrators = one pitch of the rolling elements. One pitch of the rolling elements may be based on an angle (1 pitch of the rolling elements = 360 ° / number of rolling elements), or may be based on a circumferential length (1 pitch of the rolling elements = P. CD / number of rolling elements).
このようにすると、分解性能を最適化することができる。 In this way, the decomposition performance can be optimized.
この発明のセンサ転がり軸受装置によると、所定ピッチで並ぶ複数の振動子によって、転動体の公転に伴うパルス数を数えて適宜な演算を行うことにより、回転側軌道部材の回転速度を求めることができるので、回転側軌道部材にパルサリングを設けることなく、回転情報を得ることができる。 According to the sensor rolling bearing device of the present invention, the rotational speed of the rotation-side raceway member can be obtained by performing a suitable calculation by counting the number of pulses accompanying the revolution of the rolling element by a plurality of vibrators arranged at a predetermined pitch. Therefore, rotation information can be obtained without providing a pulsar ring on the rotation side raceway member.
この発明の実施の形態を、以下図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図1および図2は、この発明のセンサ付き転がり軸受装置の1実施形態を示している。以下の説明において、左右は図1の左右をいうものとする。なお、左が車両の内側に、右が車両の外側となっている。 1 and 2 show an embodiment of a rolling bearing device with a sensor according to the present invention. In the following description, the left and right refer to the left and right in FIG. Note that the left is inside the vehicle and the right is outside the vehicle.
このセンサ付き転がり軸受装置は、センサ付きハブユニットとして使用されるもので、ハブユニット(1)およびセンサ装置(2)からなる。 This sensor-equipped rolling bearing device is used as a sensor-equipped hub unit, and includes a hub unit (1) and a sensor device (2).
ハブユニット(1)は、車体側に固定される固定側軌道部材(3)、車輪が取り付けられる回転側軌道部材(4)、両部材(3)(4)の間に2列に配置された複数の転動体である玉(5)、および各列の玉(5)をそれぞれ保持する保持器(6)を備えている。 The hub unit (1) is arranged in two rows between the fixed side track member (3) fixed to the vehicle body side, the rotary side track member (4) to which the wheel is attached, and both members (3) and (4). A ball (5), which is a plurality of rolling elements, and a cage (6) for holding each row of balls (5) are provided.
固定側軌道部材(3)は、軸受の外輪(固定輪)機能を有しているもので、内周面に2列の外輪軌道が形成されている円筒部(12)と、円筒部(12)の左端部近くに設けられて懸架装置(車体側部分)にボルトで取り付けられるフランジ部(13)とを有している。 The fixed-side raceway member (3) has a bearing outer ring (fixed ring) function, and includes a cylindrical portion (12) in which two rows of outer ring raceways are formed on the inner peripheral surface, and a cylindrical portion (12 ) And a flange portion (13) attached to the suspension device (vehicle body side portion) with a bolt.
回転側軌道部材(4)は、第1の軌道溝(15a)を有する大径部(15)および第1の軌道溝(15a)の径よりも小さい外径を有する小径部(16)を有している内軸(14)と、内軸(14)の小径部(16)外径に嵌め止められて右面が内軸(14)の大径部(15)左面に密接させられている内輪(17)とからなる。内軸(14)の右端近くには、車輪を取り付けるための複数のボルト(19)が固定されたフランジ部(18)が設けられている。内輪(17)の右部には、内軸(14)の軌道溝(15a)と並列するように、軌道溝(17a)が形成されており、内輪(17)の左部に肩部(17b)が形成されている。固定側軌道部材(3)の右端部と内軸(14)との間には、シール装置(20)が設けられている。内軸(14)の小径部(16)の左端部には、おねじ部が設けられており、このおねじ部にねじ合わされたナット(21)によって、内輪(17)が内軸(14)に固定されている。固定側軌道部材(3)の左端部には、カバー(22)が被せ止められている。 The rotation side raceway member (4) has a large diameter portion (15) having a first raceway groove (15a) and a small diameter portion (16) having an outer diameter smaller than the diameter of the first raceway groove (15a). The inner ring (14), and the inner ring (14), the inner ring (14), which has a small diameter part (16) and is fitted to the outer diameter, and the right side is in close contact with the left side of the large diameter part (15) of the inner axis (14) (17) Near the right end of the inner shaft (14), a flange portion (18) to which a plurality of bolts (19) for attaching a wheel is fixed is provided. A raceway groove (17a) is formed in the right part of the inner ring (17) so as to be parallel to the raceway groove (15a) of the inner shaft (14), and a shoulder part (17b ) Is formed. A sealing device (20) is provided between the right end portion of the fixed-side track member (3) and the inner shaft (14). A male screw is provided at the left end of the small diameter portion (16) of the inner shaft (14), and the inner ring (17) is connected to the inner shaft (14) by a nut (21) screwed to the male screw. It is fixed to. A cover (22) is covered with the left end portion of the fixed race member (3).
センサ装置(2)は、固定側軌道部材(3)と内列の玉(5)との間に作用する力(以下「転動体荷重」と称す)を検出する多振動子超音波センサ(10)と、この多振動子超音波センサ(10)の出力を処理する処理手段(図示略)とを備えている。 The sensor device (2) is a multi-vibrator ultrasonic sensor (10) that detects a force (hereinafter referred to as a “rolling element load”) acting between the fixed-side track member (3) and the inner row of balls (5). And processing means (not shown) for processing the output of the multi-vibrator ultrasonic sensor (10).
多振動子超音波センサ(10)は、この実施形態では、ハブニット(1)の頂部に1つだけ設けられている。 In this embodiment, only one multi-vibrator ultrasonic sensor (10) is provided on the top of the hub unit (1).
図2において、多振動子超音波センサ(10)は、計10個の振動子(10b)が玉(5)のP.C.D.と同心の円の周方向に等ピッチで並ぶようにケース(10b)内に設けられたもので、1から10までの各振動子(10b)は、それぞれが超音波を出力してその反射波を受信部で受けることができ、その反射エコーを求めることができる。1から10までの各振動子(10b)は、玉(5)のピッチをpとして、p/10の間隔で配置されている。 In FIG. 2, the multi-vibrator ultrasonic sensor (10) has a total of 10 transducers (10b) with P.D. C. D. Are provided in the case (10b) so as to be arranged at an equal pitch in the circumferential direction of a concentric circle, and each of the vibrators (10b) from 1 to 10 outputs an ultrasonic wave and its reflected wave Can be received by the receiver, and the reflected echo can be obtained. The vibrators (10b) 1 to 10 are arranged at intervals of p / 10, where the pitch of the balls (5) is p.
1から10までの各振動子(10b)からの出力は、以下に示すエコー比として求められる。 Outputs from the transducers (10b) 1 to 10 are obtained as echo ratios shown below.
エコー比=100×(H0−H1)/H0
H0:転動体が超音波センサから半ピッチ離れたときのエコー強度
H1:転動体が超音波センサ直下に位置するときのエコー強度
このエコー比は、転動体荷重と図3に示す関係を有しており、これを利用してエコー比から転動体荷重を求めることができる。玉(5)に作用する荷重が大きいと、接触面積が大きくなって反射波が小さくなることから、転動体荷重が大きい場合には、大きいエコー比が出力される。
Echo ratio = 100 × (H0−H1) / H0
H0: Echo intensity when the rolling element is separated from the ultrasonic sensor by a half pitch H1: Echo intensity when the rolling element is located directly below the ultrasonic sensor This echo ratio has the relationship shown in FIG. By using this, the rolling element load can be obtained from the echo ratio. If the load acting on the ball (5) is large, the contact area becomes large and the reflected wave becomes small. Therefore, when the rolling element load is large, a large echo ratio is output.
また、エコー比は、回転速度と図4に示す関係を有しており、ある時間内のエコー比のパルス数を計測することにより、回転速度を求めることができる。超音波センサ(10)が複数の振動子(10b)を有していることから、図5に示すように、玉(5)が1ピッチの1/10(=p/10)公転するごとに、超音波センサ(10)は、1から10までの各振動子(10b)が順次パルスを1つずつ検出することになり、全体では、振動子が1つの超音波センサに比べて、10倍のパルス数(複合パルス信号)が得られる。なお、回転速度が変化しても、エコー比の絶対値はこれに影響されることはない。 The echo ratio has the relationship shown in FIG. 4 with the rotational speed, and the rotational speed can be obtained by measuring the number of pulses of the echo ratio within a certain time. Since the ultrasonic sensor (10) has a plurality of vibrators (10b), as shown in FIG. 5, each time the ball (5) revolves 1/10 (= p / 10) of one pitch. In the ultrasonic sensor (10), each of the transducers (10b) 1 to 10 sequentially detects one pulse at a time, and as a whole, the transducer is 10 times as large as a single ultrasonic sensor. The number of pulses (composite pulse signal) is obtained. Even if the rotational speed changes, the absolute value of the echo ratio is not affected by this.
センサ装置(2)の処理手段には、1から10までの各振動子(10b)のパルス数を数えるパルス数カウント部と、公転速度演算部および回転速度変換部からなりパルス数カウント部で得られたパルス数を使用して回転速度を求める回転速度演算部とが設けられている。 The processing means of the sensor device (2) includes a pulse number counting unit that counts the number of pulses of each vibrator (10b) from 1 to 10, a revolution speed calculation unit, and a rotation speed conversion unit. And a rotation speed calculation unit that obtains the rotation speed using the number of pulses obtained.
1から10までの各振動子(10b)から出力されるエコー比は、車輪の回転速度が時間とともに変化することに応じてその増減回数が時間とともに変化する。そこで、パルス数カウント部において、エコー比が所定の閾値を越えるごとに、その回数(パルス数)を数えた後、回転速度演算部において、このパルス数を使用して回転速度を求めることができる。 The echo ratio output from each transducer (10b) 1 to 10 changes with time as the rotational speed of the wheel changes with time. Therefore, each time the echo ratio exceeds a predetermined threshold in the pulse number counting unit, the number of times (number of pulses) is counted, and then the rotation speed calculation unit can use this pulse number to obtain the rotation speed. .
回転速度を求めるのに必要な転動体公転速度は、転動体ピッチの周方向長さまたはP.C.D.、パルス数および時間の関数となっている。上記のように振動子(10b)の配置が玉(5)のピッチpに対応してそれぞれp/10ずらされているので、公転速度演算部では、周方向に並んだ1から10までの各振動子(10b)からのすべてのパルス数が使用されて、玉(5)の公転速度が求められる。回転速度変換部では、よく知られた式に基づいて、公転速度が回転速度に変換される。こうして、1から10までのすべての振動子(10b)から得られるパルス数を使用して時間とともに変化する回転速度が求められる。 The rolling element revolution speed required to obtain the rotational speed is the circumferential length of the rolling element pitch or P.I. C. D. It is a function of the number of pulses and time. Since the arrangement of the vibrator (10b) is shifted by p / 10 corresponding to the pitch p of the balls (5) as described above, the revolution speed calculation unit has each of 1 to 10 arranged in the circumferential direction. All the pulse numbers from the oscillator (10b) are used to determine the revolution speed of the ball (5). In the rotation speed conversion unit, the revolution speed is converted into the rotation speed based on a well-known expression. In this way, the number of pulses obtained from all the vibrators (10b) from 1 to 10 is used to obtain a rotational speed that changes with time.
なお、超音波センサ(10)の数は1つに限られるものではなく、振動子(10b)の数も10に限られるものではない。例えば、振動子の数が6つの多振動子超音波センサ(10)を周方向の2カ所に設けるようにしてもよい。超音波センサ(10)を複数配置する場合には、超音波センサ(10)が2つのときは、超音波センサ(10)同士の間隔を180°±p/2、超音波センサ(10)が4つのときは、第1番目のセンサの位置を基準として、基準位置+90°+p/4,基準位置+180°+2p/4および基準位置+270°+3p/4というように、超音波センサ(10)同士の間隔をずらすことが好ましい。また、上記においては、センサ付きハブユニットについて説明したが、上記センサ装置は、ハブユニット以外の各種転がり軸受に一体化して使用することができる。そして、転動体荷重が転がり軸受に作用する荷重と相関があることから、回転速度だけでなく、転がり軸受に作用する荷重も求めるようにしてもよい。 The number of ultrasonic sensors (10) is not limited to one, and the number of transducers (10b) is not limited to ten. For example, multi-vibrator ultrasonic sensors (10) having six vibrators may be provided at two places in the circumferential direction. When two or more ultrasonic sensors (10) are arranged, when there are two ultrasonic sensors (10), the interval between the ultrasonic sensors (10) is 180 ° ± p / 2, and the ultrasonic sensors (10) In the case of four, the ultrasonic sensors (10) are connected to each other such that the reference position + 90 ° + p / 4, the reference position + 180 ° + 2p / 4, and the reference position + 270 ° + 3p / 4 with respect to the position of the first sensor. It is preferable to shift the interval. Moreover, in the above, although the hub unit with a sensor was demonstrated, the said sensor apparatus can be integrated and used for various rolling bearings other than a hub unit. Since the rolling element load has a correlation with the load acting on the rolling bearing, not only the rotation speed but also the load acting on the rolling bearing may be obtained.
(1) 転がり軸受
(2) センサ装置
(3) 固定側軌道部材
(4) 回転側軌道部材
(5) 玉(転動体)
(11) 処理手段
(10) 超音波センサ
(10b) 振動子
(1) Rolling bearing
(2) Sensor device
(3) Fixed side raceway member
(4) Rotating track member
(5) Ball (rolling element)
(11) Processing means
(10) Ultrasonic sensor
(10b) Vibrator
Claims (2)
センサ装置は、固定側軌道部材の少なくとも1カ所に設けられかつ転動体荷重をエコー比として検知する超音波センサと、超音波センサの出力から回転速度を求める処理手段とを備えており、超音波センサは、所定ピッチで並ぶ複数の振動子を内部に有していることを特徴とするセンサ付き転がり軸受装置。 In a rolling bearing device with a sensor provided with a rolling bearing having a stationary race member, a rotating race member and rolling elements, and a sensor device,
The sensor device includes an ultrasonic sensor that is provided in at least one location of the fixed-side track member and detects the rolling element load as an echo ratio, and a processing unit that obtains the rotational speed from the output of the ultrasonic sensor. The sensor has a plurality of vibrators arranged at a predetermined pitch inside, and is a rolling bearing device with a sensor, characterized in that:
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US7997154B2 (en) | 2006-11-01 | 2011-08-16 | Jtekt Corporation | Rolling bearing device with sensor |
CN111443215A (en) * | 2020-05-14 | 2020-07-24 | 中南大学 | Rotating speed measuring system for bearing roller at high speed and high temperature |
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JP2581755B2 (en) * | 1988-05-18 | 1997-02-12 | 日立建機株式会社 | Method for measuring contact stress between rolling element and raceway of rolling bearing |
JP2002257795A (en) * | 2001-03-02 | 2002-09-11 | Sumitomo Chem Co Ltd | Bearing preload estimation device, bearing preload estimation method, bearing preload estimation program and storage medium with the program stored therein |
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JP2581755B2 (en) * | 1988-05-18 | 1997-02-12 | 日立建機株式会社 | Method for measuring contact stress between rolling element and raceway of rolling bearing |
JPH03158598A (en) * | 1989-11-16 | 1991-07-08 | Hitachi Constr Mach Co Ltd | Operation control unit for shield machine |
JPH08110285A (en) * | 1994-08-01 | 1996-04-30 | Ntn Corp | Piezoelectric film converter for bearing |
JP2002257795A (en) * | 2001-03-02 | 2002-09-11 | Sumitomo Chem Co Ltd | Bearing preload estimation device, bearing preload estimation method, bearing preload estimation program and storage medium with the program stored therein |
JP2004100841A (en) * | 2002-09-10 | 2004-04-02 | Koyo Seiko Co Ltd | Rolling bearing device |
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Publication number | Priority date | Publication date | Assignee | Title |
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US7997154B2 (en) | 2006-11-01 | 2011-08-16 | Jtekt Corporation | Rolling bearing device with sensor |
CN111443215A (en) * | 2020-05-14 | 2020-07-24 | 中南大学 | Rotating speed measuring system for bearing roller at high speed and high temperature |
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