JPH1164356A - Rolling bearing unit with rotational speed detecting device - Google Patents
Rolling bearing unit with rotational speed detecting deviceInfo
- Publication number
- JPH1164356A JPH1164356A JP9216485A JP21648597A JPH1164356A JP H1164356 A JPH1164356 A JP H1164356A JP 9216485 A JP9216485 A JP 9216485A JP 21648597 A JP21648597 A JP 21648597A JP H1164356 A JPH1164356 A JP H1164356A
- Authority
- JP
- Japan
- Prior art keywords
- inner ring
- peripheral surface
- diameter cylindrical
- ring
- raceway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
- F16C19/186—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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】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。BACKGROUND OF THE INVENTION A rolling bearing unit with a rotation speed detecting device according to the present invention rotatably supports a wheel of an automobile with respect to a suspension device, and is used for detecting the rotation speed of the wheel.
【０００２】[0002]
【従来の技術】自動車の車輪を懸架装置に対して回転自
在に支持するのに、転がり軸受ユニットを使用する。
又、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）を制御する為に
は、上記車輪の回転速度を検出する必要がある。この
為、上記転がり軸受ユニットに回転速度検出装置を組み
込んだ、回転速度検出装置付転がり軸受ユニットによ
り、上記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事が、近年広く行
なわれる様になっている。2. Description of the Related Art Rolling bearing units are used to rotatably support the wheels of an automobile with respect to a suspension system.
Further, in order to control an antilock brake system (ABS) or a traction control system (TCS), it is necessary to detect the rotation speed of the wheel. For this reason, the above-mentioned wheel is rotatably supported with respect to the suspension device by a rolling bearing unit with a rotation speed detecting device in which a rotation speed detecting device is incorporated in the above-mentioned rolling bearing unit, and the rotation speed of the wheel is detected. However, it has been widely practiced in recent years.
【０００３】この様な回転速度検出装置付転がり軸受ユ
ニットは、例えば、使用時にも回転しない外輪の内側
に、使用時に回転するハブ（第一の内輪）及びこのハブ
の内端部（自動車への組み付け状態で幅方向中央側とな
る端部）に外嵌固定した内輪（第二の内輪）を、複数の
転動体を介して回転自在に支持している。これと共に、
上記内輪の一部に固定した、円周方向に亙る特性を交互
に且つ等間隔に変化させたエンコーダの回転速度を、上
記外輪の一部に支持したセンサにより検出自在としてい
る。[0003] Such a rolling bearing unit with a rotation speed detecting device includes, for example, a hub (first inner ring) that rotates during use and an inner end portion of the hub (such as a motor vehicle) inside an outer ring that does not rotate during use. An inner ring (second inner ring) externally fitted and fixed to the widthwise center side (in the assembled state) is rotatably supported via a plurality of rolling elements. With this,
The rotation speed of an encoder fixed to a part of the inner ring and having its characteristics in the circumferential direction alternately and at equal intervals is detectable by a sensor supported on a part of the outer ring.
【０００４】又、この様な回転速度検出装置付転がり軸
受ユニットのうち、回転速度検出装置の検出精度を向上
させるべく、上記エンコーダの形状を断面クランク形で
全体を円環状に形成する事により、このエンコーダの特
性を変化させる部分の外径寸法を大きくする事が考えら
れている。この様なエンコーダは、外径側を構成する大
径円筒部の外周面の特性を、円周方向に亙り交互に且つ
等間隔に変化させると共に、内径側を構成する小径円筒
部を、上記内輪の一部に外嵌固定した状態で、上記外輪
の直径方向内方に配置する。又、上記センサは、上記外
輪の軸方向中間部に設けた取付孔内に支持した状態で、
このセンサの検出部を上記エンコーダの大径円筒部の外
周面に対向させる。In order to improve the detection accuracy of the rotation speed detecting device in such a rolling bearing unit with a rotation speed detecting device, the encoder is formed in an annular shape with a crank-shaped cross section. It has been considered to increase the outer diameter of a portion that changes the characteristics of the encoder. In such an encoder, the characteristics of the outer peripheral surface of the large-diameter cylindrical portion constituting the outer diameter side are changed alternately and at regular intervals in the circumferential direction, and the small-diameter cylindrical portion constituting the inner diameter side is connected to the inner ring. And is arranged radially inward of the outer race in a state where the outer race is fixed to a part of the outer race. The sensor is supported in a mounting hole provided at an axially intermediate portion of the outer ring,
The detection section of this sensor is made to face the outer peripheral surface of the large-diameter cylindrical section of the encoder.
【０００５】上述の様な回転速度検出装置付転がり軸受
ユニットの使用時には、上記外輪を懸架装置に支持する
と共に、上記ハブの外端部（自動車への組み付け状態で
幅方向外側となる端部）外周面で上記外輪から外れた部
分に設けたフランジに車輪を固定し、この車輪を上記懸
架装置に対して回転自在に支持する。車輪の回転に伴っ
て上記内輪の外周面に固定したエンコーダが回転する
と、検出部をこのエンコーダの大径円筒部の外周面に対
向させたセンサの出力が変化する。このセンサの出力が
変化する周波数は、上記車輪の回転速度に比例する。従
って、このセンサの出力信号を上記車輪の回転速度を求
める制御器に送れば、ＡＢＳやＴＣＳを適切に制御でき
る。When the above-described rolling bearing unit with a rotation speed detecting device is used, the outer ring is supported by a suspension device, and the outer end portion of the hub (the end portion which is outward in the width direction when assembled to a vehicle). A wheel is fixed to a flange provided on a portion of the outer peripheral surface deviating from the outer ring, and the wheel is rotatably supported by the suspension device. When the encoder fixed to the outer peripheral surface of the inner ring rotates with the rotation of the wheel, the output of the sensor whose detection unit is opposed to the outer peripheral surface of the large-diameter cylindrical portion of the encoder changes. The frequency at which the output of this sensor changes is proportional to the rotational speed of the wheel. Therefore, if the output signal of this sensor is sent to a controller that determines the rotational speed of the wheel, ABS and TCS can be controlled appropriately.
【０００６】[0006]
【発明が解決しようとする課題】上述の様な回転速度検
出装置付転がり軸受ユニットの場合、組立作業が面倒
で、品質保持とコスト低減とを両立させる事が難しい。
この理由は、次の通りである。即ち、上述の様な回転速
度検出装置付転がり軸受ユニットを組み立てる場合に
は、先ず、外輪の外端開口部からこの外輪の内側にハブ
を挿入する。そして、上記外輪の内端開口部からこの外
輪の内側に、内輪及びこの内輪に取り付けたエンコーダ
を挿入すると共に、この内輪を上記ハブの内端部に外嵌
固定する。ところが、上記外輪の内側に挿入するエンコ
ーダは、円周方向に亙る特性の変化を大きくすべく、上
記大径円筒部の外径寸法をできるだけ（上記エンコーダ
を外輪の内側に挿入した状態で、上記大径円筒部の外周
面が外輪の内周面及びセンサの先端面と干渉しない程度
に）大きくしている。この為、上述の様なエンコーダの
挿入作業を注意深く行なわないと、上記大径円筒部の先
端縁を外輪の内周面に形成した外輪軌道の大径側端縁部
にぶつけてしまう。そして、ぶつけた場合には、上記エ
ンコーダの取付位置が不正となったり、或は、このエン
コーダが破損等して、正確な回転速度検出が行なえなく
なる可能性がある。この様な不都合は、上記エンコーダ
の挿入作業を慎重に行なう事により解消できるが、その
分、組立作業の能率が低下し、製造コストが嵩む。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
様な不都合を解消すべく発明したものである。In the case of the above-mentioned rolling bearing unit with a rotation speed detecting device, the assembling work is troublesome, and it is difficult to achieve both quality maintenance and cost reduction.
The reason is as follows. That is, when assembling the above-described rolling bearing unit with a rotation speed detection device, first, a hub is inserted into the outer ring from the outer end opening of the outer ring. Then, an inner ring and an encoder attached to the inner ring are inserted into the outer ring from the inner end opening of the outer ring, and the inner ring is externally fitted and fixed to the inner end of the hub. However, the encoder to be inserted inside the outer ring should have the outer diameter of the large-diameter cylindrical portion as large as possible (in a state where the encoder is inserted inside the outer ring, in order to increase the change in characteristics in the circumferential direction). The outer peripheral surface of the large-diameter cylindrical portion is increased to such an extent that it does not interfere with the inner peripheral surface of the outer ring and the tip end surface of the sensor. For this reason, if the insertion work of the encoder as described above is not performed carefully, the leading edge of the large-diameter cylindrical portion will hit the large-diameter side edge of the outer raceway formed on the inner peripheral surface of the outer race. In the event of a collision, there is a possibility that the mounting position of the encoder becomes incorrect, or the encoder is damaged or the like, so that accurate rotation speed detection cannot be performed. Such inconveniences can be solved by carefully inserting the encoder, but the efficiency of the assembling operation is reduced and the manufacturing cost is increased. A rolling bearing unit with a rotation speed detecting device according to the present invention has been invented in order to solve the above-mentioned disadvantages.
【０００７】[0007]
【課題を解決するための手段】本発明の回転速度検出装
置付転がり軸受ユニットは、使用時に回転する第一の内
輪と、この第一の内輪の一端部外周面に設けられた、こ
の第一の内輪に車輪を支持固定する為のフランジと、上
記第一の内輪の中間部外周面に、直接又はこの第一の内
輪と別体の内輪を介して形成した第一の内輪軌道と、上
記第一の内輪の他端部に形成された、この第一の内輪軌
道を形成した部分よりも外径寸法が小さくなった段部
と、外周面に第二の内輪軌道を形成して上記段部に外嵌
固定された第二の内輪と、内周面に上記第一の内輪軌道
に対向する第一の外輪軌道及び上記第二の内輪軌道に対
向する第二の外輪軌道を有し、使用時にも回転しない外
輪と、この外輪を懸架装置に取り付けるべく、この外輪
の外周面に設けられた取付部と、上記第一、第二の内輪
軌道と上記第一、第二の外輪軌道との間に、それぞれ複
数個ずつ設けられた転動体と、互いに同心の大径円筒部
と小径円筒部とこれら両円筒部同士を連続させる連続部
とから成り、上記大径円筒部の外周面の円周方向に亙る
特性を交互に且つ等間隔に変化させ、上記小径円筒部を
上記第二の内輪の外周面の一部で上記第二の内輪軌道か
ら外れた部分に、上記大径円筒部を上記第一の内輪軌道
側に向けた状態で外嵌固定する事により上記複列に設け
られた転動体の列の間部分に、上記第一、第二の内輪と
同心に配置されたエンコーダと、検出部を有し、この検
出部を上記エンコーダの大径円筒部の外周面に対向させ
た状態で上記外輪の軸方向中間部に設けた取付孔内に支
持され、上記大径円筒部の外周面の特性の変化に対応し
て出力信号を変化させるセンサとを備える。更に、上記
段部と上記第二の内輪との嵌合部の軸方向寸法を、上記
第二の外輪軌道の外輪の中央側の端縁と上記大径円筒部
の先端縁との軸方向に亙る間隔よりも大きくしている。According to the present invention, a rolling bearing unit with a rotation speed detecting device according to the present invention comprises a first inner ring which rotates during use, and a first inner ring provided on an outer peripheral surface of one end of the first inner ring. A flange for supporting and fixing the wheel to the inner ring, and a first inner ring raceway formed directly or through an inner ring separate from the first inner ring on the intermediate outer peripheral surface of the first inner ring, A step formed at the other end of the first inner ring and having an outer diameter smaller than that of the portion forming the first inner ring track, and a step formed by forming a second inner ring track on the outer peripheral surface. A second inner ring fixed to the outer portion of the portion, a first outer ring track facing the first inner ring track and a second outer ring track facing the second inner ring track on the inner peripheral surface, An outer ring that does not rotate during use and is provided on the outer peripheral surface of this outer ring to attach this outer ring to the suspension system. A plurality of rolling elements respectively provided between the mounting portion and the first and second inner raceways and the first and second outer raceways, and a large-diameter cylindrical portion and a small-diameter cylindrical portion concentric with each other. And a continuous portion that connects these two cylindrical portions to each other. The characteristics of the outer peripheral surface of the large-diameter cylindrical portion in the circumferential direction are alternately changed at equal intervals, and the small-diameter cylindrical portion is connected to the second inner ring. The large diameter cylindrical portion is provided in the double row by externally fitting and fixing the large-diameter cylindrical portion toward the first inner ring raceway side at a part deviating from the second inner raceway on a part of the outer peripheral surface of In the portion between the rows of rolling elements, the first and second inner rings are arranged concentrically with an encoder, and a detector is provided. The detector is opposed to the outer peripheral surface of the large-diameter cylindrical portion of the encoder. In this state, the outer ring is supported in a mounting hole provided at an intermediate portion in the axial direction of the outer ring. In response to the change and a sensor for changing the output signal. Further, the axial dimension of the fitting portion between the step portion and the second inner ring is set in the axial direction between the center edge of the outer ring of the second outer ring track and the tip edge of the large-diameter cylindrical portion. Greater than the span over which it spans.
【０００８】[0008]
【作用】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により、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
する際の作用自体は、従来から一般的に知られた回転速
度検出装置付転がり軸受ユニットの場合と同様である。
特に、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、エンコーダを構成する大径円筒部の外径寸
法を大きくした場合でも、このエンコーダを外輪の内側
に挿入する際に、上記大径円筒部の端縁が外輪の内周面
に形成した第二の外輪軌道の大径側端縁部にぶつかる事
を防止できる。従って、上記エンコーダの取付位置が不
正となったり、或は、このエンコーダが破損等する事を
防止できて、回転速度検出装置の品質保持を図れる。
又、上述の様な大径円筒部と外輪の大径側端縁部との干
渉防止を、構成各部材の寸法を規制する事により図るの
で、上記エンコーダの挿入作業が面倒にならず、部品加
工が面倒になる事もない為、製造コストを高くする事も
ない。With the rolling bearing unit with the rotation speed detecting device of the present invention configured as described above, the wheel is rotatably supported with respect to the suspension device, and the operation itself when detecting the rotation speed of the wheel is as follows. This is the same as the case of a conventionally known rolling bearing unit with a rotation speed detecting device.
In particular, in the case of the rolling bearing unit with the rotation speed detecting device of the present invention, even when the outer diameter of the large-diameter cylindrical portion constituting the encoder is increased, when the encoder is inserted inside the outer ring, the above-described large-diameter cylinder is inserted. The edge of the diameter cylindrical portion can be prevented from hitting the large diameter side edge of the second outer raceway formed on the inner peripheral surface of the outer race. Therefore, it is possible to prevent the mounting position of the encoder from being incorrect, or to prevent the encoder from being damaged, and to maintain the quality of the rotation speed detecting device.
In addition, since the interference between the large-diameter cylindrical portion and the large-diameter side edge of the outer ring is prevented by regulating the dimensions of the constituent members, the insertion work of the encoder is not troublesome, and Since the processing is not troublesome, the manufacturing cost is not increased.
【０００９】[0009]
【発明の実施の形態】図１〜３は、本発明の実施の形態
の１例を示している。本例の回転速度検出装置付転がり
軸受ユニットを構成する転がり軸受ユニットは、ハブ１
（第一の内輪）と、内輪２（第二の内輪）と、外輪３
と、複数個の転動体４、４とを備える。このうちのハブ
１の外周面の外端部（外とは、自動車への組み付け状態
で幅方向外寄りとなる側を言い、図１、３の右側とな
る。反対に幅方向中央寄りとなる側を内と言い、図１、
３の左側となる。）には、車輪を支持する為のフランジ
５を設けている。又、上記ハブ１の中間部外周面には第
一の内輪軌道６を形成している。尚、この第一の内輪軌
道６は、上記ハブ１の中間部外周面に直接形成する他、
このハブ１の中間部外周面に外嵌した別体の内輪の外周
面に形成する場合もある。1 to 3 show an example of an embodiment of the present invention. The rolling bearing unit that constitutes the rolling bearing unit with the rotation speed detecting device of the present example is a hub 1
(First inner ring), inner ring 2 (second inner ring), and outer ring 3
And a plurality of rolling elements 4. Of these, the outer end portion of the outer peripheral surface of the hub 1 (outside refers to a side that is outward in the width direction when assembled to an automobile, and is the right side in FIGS. 1 and 3. Conversely, it is near the center in the width direction. The side is called in, Figure 1,
3 to the left. ) Is provided with a flange 5 for supporting the wheels. A first inner raceway 6 is formed on the outer peripheral surface of the intermediate portion of the hub 1. The first inner raceway 6 is formed directly on the outer peripheral surface of the intermediate portion of the hub 1.
In some cases, the hub 1 is formed on the outer peripheral surface of a separate inner race fitted to the outer peripheral surface of the intermediate portion.
【００１０】又、上記ハブ１の内端部には、このハブ１
の外周面から直径方向内方に凹入する段部７を、全周に
亙りこのハブ１と同心に設けている。この段部７には、
外周面に第二の内輪軌道８を形成した上記内輪２を、締
り嵌めにより外嵌固定している。又、この様に外嵌固定
した状態で上記内輪２の内端部は、上記ハブ１の内端面
から軸方向内方に突出する。尚、車両への組み付け状態
で上記内輪２の内端面は、図示しない等速ジョイントの
段差面に当接する。又、上記ハブ１の中心部に設けたス
プライン孔２７には、上記等速ジョイントに付属したス
プライン軸が挿通され、このスプライン軸の先端部で上
記ハブ１の外端面よりも外方に突出した部分に設けた雄
ねじ部に、やはり図示しないナットを螺合し、更に緊締
する。このナットの緊締に基づいて、等速ジョイントの
段差面が上記内輪２の内端面を強く押圧し、この内輪２
が上記段部７から抜け出るのを防止する。[0010] The hub 1 is provided at the inner end thereof.
A step 7 is provided concentrically with the hub 1 over the entire circumference. In this step 7,
The inner race 2 having the second inner raceway 8 formed on the outer peripheral surface is externally fitted and fixed by interference fitting. In this state, the inner end of the inner race 2 projects axially inward from the inner end surface of the hub 1 in the state where the outer ring is fixed. The inner end surface of the inner ring 2 comes into contact with a step surface of a constant velocity joint (not shown) in a state of being assembled to the vehicle. A spline shaft attached to the constant velocity joint is inserted into a spline hole 27 provided at the center of the hub 1, and the tip of the spline shaft protrudes outward from the outer end surface of the hub 1. A nut (not shown) is screwed into the male screw portion provided in the portion, and further tightened. Based on the tightening of the nut, the stepped surface of the constant velocity joint strongly presses the inner end surface of the inner ring 2,
Is prevented from getting out of the step portion 7.
【００１１】又、上記外輪４の内周面には、それぞれ上
記第一、第二の内輪軌道６、８と対向する第一、第二の
外輪軌道９、１０を形成している。そして、これら各内
輪軌道６、８と各外輪軌道９、１０との間にそれぞれ複
数個ずつの転動体４、４を、それぞれ保持器１２、１２
により保持した状態で転動自在に設ける事により、上記
外輪４の内側に上記ハブ１及び内輪２を回転自在に支持
している。尚、図示の例では、転動体４、４として玉を
使用しているが、重量の嵩む自動車用の転がり軸受ユニ
ットの場合には、これら転動体としてテーパころを使用
する場合もある。又、上記外輪４の内端寄り部分の外周
面には、この外輪４を懸架装置に取り付ける為の外向フ
ランジ状の取付部１３を設けている。又、上記外輪３の
両端開口部と上記ハブ１の中間部外周面及び上記内輪２
の内端部外周面との間の隙間は、それぞれシールリング
２６、２６により塞いでいる。On the inner peripheral surface of the outer race 4, there are formed first and second outer races 9 and 10, which face the first and second inner races 6 and 8, respectively. A plurality of rolling elements 4, 4 are provided between the inner raceways 6, 8 and the outer raceways 9, 10, respectively.
The hub 1 and the inner ring 2 are rotatably supported inside the outer ring 4 by being provided so as to be able to roll freely while being held. In the illustrated example, balls are used as the rolling elements 4 and 4. However, in the case of a heavy-duty rolling bearing unit for an automobile, tapered rollers may be used as these rolling elements. An outer flange-like mounting portion 13 for mounting the outer ring 4 to a suspension device is provided on the outer peripheral surface of the outer ring 4 near the inner end. Further, the opening portions at both ends of the outer ring 3, the outer peripheral surface of the intermediate portion of the hub 1, and the inner ring 2
Are closed by seal rings 26 and 26, respectively.
【００１２】又、上記内輪２の外周面の一部で上記第二
の内輪軌道８から外れた部分には、エンコーダ１４を、
この内輪２と同心に外嵌固定している。このエンコーダ
１４は、鋼板等の磁性金属板を曲げ形成する事により、
断面クランク形で円環状に形成したもので、互いに同心
の大径円筒部１５及び小径円筒部１６と、これら大径円
筒部１５の内端縁と小径円筒部１６の外端縁とを連続さ
せる円輪状の連続部１７とから成る。この様なエンコー
ダ１４は、上記大径円筒部１５を上記内輪２の外端面か
ら軸方向外方に突出させた状態で、上記小径円筒部１６
をこの内輪２の外周面の一部で上記第二の内輪軌道８か
ら外れた部分に締り嵌めで外嵌固定する事により、上記
複列に設けた転動体４、４の列の間部分に配置してい
る。尚、上記小径円筒部１６と内輪２との嵌合部の軸方
向寸法を大きくして、上記エンコーダ１４の内輪２に対
する嵌合強度を十分に確保すべく、上記小径円筒部１６
の一部（図１の左端部）は、上記第二の内輪軌道８と第
二の外輪軌道１０との間に設けた複数個の転動体４、４
を保持した保持器１２の一部（図１の右端部）の直径方
向内方に迄位置させている。An encoder 14 is attached to a part of the outer peripheral surface of the inner ring 2 which is off the second inner ring raceway 8.
The outer ring is fixed concentrically with the inner ring 2. This encoder 14 is formed by bending a magnetic metal plate such as a steel plate.
A large-diameter cylindrical portion 15 and a small-diameter cylindrical portion 16 concentric with each other, and an inner edge of the large-diameter cylindrical portion 15 and an outer edge of the small-diameter cylindrical portion 16 are continuous with each other. And a ring-shaped continuous portion 17. The encoder 14 is configured such that the large-diameter cylindrical portion 15 projects axially outward from the outer end surface of the inner ring 2, and the small-diameter cylindrical portion 16
Is fixed to the part of the outer peripheral surface of the inner ring 2 which is outside the second inner ring raceway 8 by interference fitting, so that the rolling elements 4 and 4 provided in the double rows are provided between the rows. Have been placed. In order to increase the axial dimension of the fitting portion between the small-diameter cylindrical portion 16 and the inner ring 2, the small-diameter cylindrical portion 16
1 (the left end in FIG. 1) includes a plurality of rolling elements 4, 4 provided between the second inner raceway 8 and the second outer raceway 10.
Of the retainer 12 (right end in FIG. 1) which holds the inner side in the diametrical direction.
【００１３】又、上記大径円筒部１５の軸方向中間部に
複数の透孔１８、１８を、円周方向に亙り等間隔に形成
する事により、この大径円筒部１５の外周面の磁気特性
を、円周方向に亙り交互に且つ等間隔に変化させてい
る。尚、この大径円筒部１５の外径寸法は、この大径円
筒部１５の円周方向に亙る磁気特性の変化を大きくすべ
く、できるだけ（上記エンコーダ１４を上記外輪３の内
側に挿入した状態で、この大径円筒部１５の外周面と上
記外輪３の内周面及び後述するセンサ２０の先端面とが
干渉しない程度に）大きくしている。Further, a plurality of through holes 18 are formed at an intermediate portion in the axial direction of the large-diameter cylindrical portion 15 at equal intervals in the circumferential direction, so that the outer peripheral surface of the large-diameter cylindrical portion 15 can be made magnetic. The characteristics are changed alternately and at regular intervals in the circumferential direction. The outer diameter of the large-diameter cylindrical portion 15 should be as large as possible (in a state where the encoder 14 is inserted inside the outer ring 3) in order to increase the change in magnetic characteristics in the circumferential direction of the large-diameter cylindrical portion 15. Therefore, the outer peripheral surface of the large-diameter cylindrical portion 15 and the inner peripheral surface of the outer ring 3 and the tip surface of the sensor 20 described later do not interfere with each other.
【００１４】尚、エンコーダ１４を上述の様な位置に取
り付ける関係上、本発明の回転速度検出装置付転がり軸
受ユニットを組み立てる場合には、先ず、上記ハブ１を
上記外輪３の内径側に、片側（図１の右側）の転動体
４、４及び保持器１２のみを組み付けた状態で挿入す
る。そして、反対側（図１の左側）の転動体４、４及び
保持器１２は、上記内輪２の外周面に形成した第二の内
輪軌道８の外径側に組み付けた状態で、この内輪２に外
嵌固定したエンコーダ１４と共に上記外輪３の内側に挿
入する。そして、上記内輪２を前記段部７に外嵌し、こ
の内輪２の外端面を、上記段部７の段差面に突き当て
る。In order to assemble the rolling bearing unit with the rotation speed detecting device of the present invention, since the encoder 14 is mounted at the above-described position, first, the hub 1 is placed on the inner diameter side of the outer ring 3, Insert only the rolling elements 4 and 4 (right side in FIG. 1) and the retainer 12 in an assembled state. The rolling elements 4, 4 and the retainer 12 on the opposite side (the left side in FIG. 1) are mounted on the outer diameter side of the second inner ring raceway 8 formed on the outer peripheral surface of the inner ring 2. Is inserted inside the outer ring 3 together with the encoder 14 fixed to the outside. Then, the inner ring 2 is externally fitted to the step portion 7, and an outer end surface of the inner ring 2 is abutted against a step surface of the step portion 7.
【００１５】この様に、ハブ１とエンコーダ１４を外嵌
固定した内輪２とを外輪３の内側に組み付けた状態で、
上記段部７と上記内輪２との嵌合部の軸方向寸法Ｗ7
を、上記第二の外輪軌道１０の軸方向外側の端縁と上記
エンコーダ１４の大径円筒部１５の先端縁（図１の右端
縁）との軸方向に亙る間隔Ｌ14よりも大きく（Ｗ7 ＞Ｌ
14）している。尚、上記嵌合部の軸方向寸法Ｗ7 とは、
ハブ１及び内輪２の端縁部に形成した面取り部を除き、
純粋に上記段部７と内輪２とが締り嵌めで嵌合している
部分の寸法を言う。これら寸法Ｗ7 と間隔Ｌ14との関係
をこの様に規制するのは、後述する様に、予め内輪２に
外嵌固定したエンコーダ１４を上記外輪３の内側に挿入
する際に、前述の様に外径寸法を大きくした大径円筒部
１５の先端縁が、上記第二の外輪軌道１０の軸方向外側
の端縁（＝大径側端縁＝中央側の端縁）にぶつからない
様にする為である。As described above, in a state where the hub 1 and the inner ring 2 to which the encoder 14 is externally fitted and fixed are assembled inside the outer ring 3,
Axial dimension W 7 of a fitting portion between the stepped portion 7 and the inner ring 2
The larger than the distance L 14 over the axial direction of the leading edge of the large diameter cylindrical portion 15 (right end edge in Fig. 1) of the second axial outer edges and the encoder 14 of the outer ring raceway 10 (W 7 > L
14 ) You are. In addition, the axial dimension W 7 of the fitting portion is
Except for the chamfers formed at the edges of the hub 1 and the inner ring 2,
The dimension of the portion where the step 7 and the inner ring 2 are purely fitted by interference fit. The relationship between the dimension W 7 and the interval L 14 is regulated in this manner, as described later, when the encoder 14 previously fitted and fixed to the inner race 2 is inserted into the outer race 3 as described above. So that the leading edge of the large-diameter cylindrical portion 15 whose outer diameter is increased does not hit the outer edge in the axial direction of the second outer raceway 10 (= large-diameter side edge = central-side edge). To do that.
【００１６】一方、上記外輪３の軸方向中間部で上記大
径円筒部１５の直径方向外方位置には、取付孔１９を、
上記外輪３の内周面と外周面とを互いに連通させる状態
で形成している。そして、この取付孔１９内にセンサ２
０を挿入固定し、このセンサ２０の先端面（図１の下端
面、図２の左端面）に設けた検出部を、上記大径円筒部
１５の外周面に、微小隙間を介して対向させている。取
付孔１９へのセンサ２０の挿入作業は、転がり軸受ユニ
ットの組立完了後に行なう。この様に取付孔１９にセン
サ２０を挿入固定した状態で、このセンサ２０は、上記
エンコーダ１４の回転速度を検出自在である。尚、図示
の例では、上記取付孔１９を、ほぼ水平方向位置、即
ち、重力の作用方向に対してほぼ直角方向位置に形成し
ている（図２参照）。この理由は、車重による曲げモー
メントを強く受ける上記外輪３の上下方向両端部に上記
取付孔１９を形成する事に基づき、この外輪３の強度が
低下する事を防止する為である。言い換えれば、上記取
付孔１９を、強度上の問題が生じにくいほぼ水平方向位
置に設ける事により、上記外輪３の肉厚を特に大きくし
なくても、必要とする強度を確保できる様にする為であ
る。On the other hand, a mounting hole 19 is provided at an axially intermediate portion of the outer ring 3 at a position radially outward of the large-diameter cylindrical portion 15.
The inner peripheral surface and the outer peripheral surface of the outer ring 3 are formed so as to communicate with each other. The sensor 2 is inserted into the mounting hole 19.
The sensor 20 is inserted and fixed, and the detection unit provided on the front end surface (the lower end surface in FIG. 1 and the left end surface in FIG. 2) of the sensor 20 is opposed to the outer peripheral surface of the large-diameter cylindrical portion 15 via a minute gap. ing. The operation of inserting the sensor 20 into the mounting hole 19 is performed after the assembly of the rolling bearing unit is completed. With the sensor 20 inserted and fixed in the mounting hole 19 in this manner, the sensor 20 can detect the rotation speed of the encoder 14. In the illustrated example, the mounting hole 19 is formed at a substantially horizontal position, that is, at a position substantially perpendicular to the direction in which gravity acts (see FIG. 2). The reason for this is to prevent the strength of the outer ring 3 from being reduced due to the formation of the mounting holes 19 at both ends in the vertical direction of the outer ring 3 which strongly receives the bending moment due to the vehicle weight. In other words, by providing the mounting hole 19 at a substantially horizontal position where a problem in strength is unlikely to occur, the required strength can be secured without increasing the thickness of the outer ring 3 in particular. It is.
【００１７】又、上記外輪３の外周面で上記取付孔１９
の外端開口の周囲部分には、この取付孔１９の中心軸に
対して直交する方向に存在する、平坦な取付面２１を形
成している。そして、この取付面２１と上記取付孔１９
の内周面との連続部に、円錐凹面状の面取り部２２を形
成している。一方、上記センサ２０の基端部（図１の上
端部、図２の右端部）には取付部２３を固設し、この取
付部２３の端部に挿通したねじ２４により、この取付部
２３を上記外輪３に結合固定している。この状態で、上
記センサ２０の基端部に外嵌したＯリング２５を、上記
面取り部２２との間で弾性的に圧縮し、上記センサ２０
を装着した部分を密封し、上記取付孔１９を通じて、雨
水等の異物が上記外輪３内に侵入する事を防止してい
る。Further, the outer peripheral surface of the outer ring 3 has the mounting hole 19 formed therein.
A flat mounting surface 21 is formed around the outer end opening of the mounting hole 19 in a direction orthogonal to the central axis of the mounting hole 19. The mounting surface 21 and the mounting hole 19
A chamfered portion 22 having a conical concave shape is formed in a continuous portion with the inner peripheral surface of the light emitting device. On the other hand, a mounting portion 23 is fixed to the base end (the upper end portion in FIG. 1 and the right end portion in FIG. 2) of the sensor 20, and the mounting portion 23 is fixed by a screw 24 inserted through the end of the mounting portion 23. Are fixedly connected to the outer ring 3. In this state, the O-ring 25 externally fitted to the base end of the sensor 20 is elastically compressed between the chamfered portion 22 and the
Is sealed to prevent foreign matter such as rainwater from entering the outer ring 3 through the mounting hole 19.
【００１８】上述の様な回転速度検出装置付転がり軸受
ユニットの場合、ハブ１の外端部に設けたフランジ５に
固定した車輪を、外輪３を支持した懸架装置に対し、回
転自在に支持できる。又、車輪の回転に伴って内輪２に
外嵌固定したエンコーダ１４が回転すると、上記センサ
２０の先端面に設けた検出部の近傍を、上記大径円筒部
１５の軸方向中間部に設けた透孔１８、１８と円周方向
に隣り合う透孔１８、１８同士の間に存在する柱部とが
交互に通過する。この結果、上記センサ２０内を流れる
磁束の密度が変化し、このセンサ２０の出力が変化す
る。この様にしてセンサ２０の出力が変化する周波数
は、車輪の回転速度に比例する。従って、センサ２０の
出力を図示しない制御器に送れば、ＡＢＳやＴＣＳを適
切に制御できる。In the case of the above-described rolling bearing unit with a rotation speed detecting device, the wheel fixed to the flange 5 provided at the outer end of the hub 1 can be rotatably supported by the suspension device supporting the outer ring 3. . Further, when the encoder 14 externally fixed to the inner ring 2 rotates with the rotation of the wheel, the vicinity of the detection unit provided on the distal end surface of the sensor 20 is provided at the axially intermediate portion of the large-diameter cylindrical portion 15. The through holes 18, 18 and the pillars existing between the circumferentially adjacent through holes 18, 18 alternately pass. As a result, the density of the magnetic flux flowing in the sensor 20 changes, and the output of the sensor 20 changes. The frequency at which the output of the sensor 20 changes in this way is proportional to the rotational speed of the wheel. Therefore, if the output of the sensor 20 is sent to a controller (not shown), the ABS and TCS can be appropriately controlled.
【００１９】特に、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、エンコーダ１４を構成する大
径円筒部１５の外径寸法を、前述の様に大きくした場合
でも、上記エンコーダ１４を上記外輪３の内側に挿入す
る作業を、この大径円筒部１５の先端縁を、前記第二の
外輪軌道１０の軸方向外側の端縁にぶつける事なく、容
易に行なえる。即ち、本発明の場合、回転速度検出装置
付転がり軸受ユニットを組み立てた状態での、ハブ１の
内端部に設けた段部７と内輪２との嵌合部の軸方向寸法
Ｗ7 を、第二の外輪軌道１０の軸方向外側の端縁と上記
エンコーダ１４の大径円筒部１５の先端縁との軸方向に
亙る間隔Ｌ14よりも大きくしている。この為、予め内輪
２に外嵌固定したエンコーダ１４を上記外輪３の内側に
挿入する際には、図３に示す様に、上記大径円筒部１５
の先端縁が上記第二の外輪軌道１０の軸方向外側の端
縁、言い換えれば、上記外輪３の内周面の一部で、第
一、第二の外輪軌道９、１０同士の間に存在する小径部
１１の内端縁部に達するよりも先に、上記内輪２の外端
部と上記段部７の先端部（図１、３の左端部）とが嵌合
する。そして、この嵌合に基づき、上記外輪３とエンコ
ーダ１４との中心軸が一致する。In particular, in the case of the rolling bearing unit with the rotation speed detecting device of the present invention, even if the outer diameter of the large-diameter cylindrical portion 15 constituting the encoder 14 is increased as described above, The work of inserting the inside of the outer ring 3 can be easily performed without hitting the leading edge of the large-diameter cylindrical portion 15 against the outer edge of the second outer ring track 10 in the axial direction. That is, in the case of the present invention, in the assembled rolling bearing unit, the axial dimension W 7 of the fitting portion of the step portion 7 and the inner ring 2 which is provided on the inner end of the hub 1, It is greater than the second distance L 14 over the axial direction of the leading edge of the large diameter cylindrical portion 15 of the axially outer edge and the encoder 14 of the outer ring raceway 10. For this reason, when inserting the encoder 14 previously fitted and fixed to the inner ring 2 inside the outer ring 3, as shown in FIG.
Is located at the axially outer edge of the second outer raceway 10, in other words, at a part of the inner peripheral surface of the outer race 3, between the first and second outer raceways 9, 10. The outer end of the inner race 2 and the tip of the step 7 (the left end in FIGS. 1 and 3) are fitted before reaching the inner end of the small diameter portion 11. Then, based on this fitting, the center axes of the outer ring 3 and the encoder 14 coincide.
【００２０】従って、上記エンコーダ１４を外輪３の内
側に挿入する際に、上記大径円筒部１５と外輪３の小径
部１１の開口周縁部とが干渉する事を防止できる。尚、
上記外輪３の内周面のうち上記小径部１１よりも軸方向
内側に存在する部分の内径は、上記大径円筒部１５の外
径寸法よりも十分に大きい為、組み付け作業時に通常の
注意を払えば、この大径円筒部１５の先端縁を上記外輪
３の内端開口周縁部等と衝突させる事はない。従って、
上記エンコーダ１４の取付位置が不正となったり、或
は、このエンコーダ１４が破損等する事を防止できて、
回転速度検出装置の品質保持を図れる。又、上述の様な
大径円筒部１５と第二の外輪軌道１０の軸方向外側の端
縁との干渉防止は、構成各部材の寸法を規制する事によ
り図っているので、内輪２への上記エンコーダ１４の組
み付け作業が面倒になったり、構成各部材のコストが嵩
む事はない。この為、エンコーダ１４を組み付けた内輪
２とハブ１との組み付け作業を容易にできる分だけ、回
転速度検出装置付転がり軸受ユニットの製造コストの低
廉化を図れる。Therefore, when the encoder 14 is inserted inside the outer race 3, it is possible to prevent the interference between the large-diameter cylindrical portion 15 and the opening edge of the small-diameter portion 11 of the outer race 3. still,
The inner diameter of the portion of the inner peripheral surface of the outer ring 3 that is located axially inward of the small-diameter portion 11 is sufficiently larger than the outer diameter of the large-diameter cylindrical portion 15. If paid, the leading edge of the large-diameter cylindrical portion 15 does not collide with the inner peripheral edge of the outer ring 3. Therefore,
It is possible to prevent the mounting position of the encoder 14 from being incorrect or the encoder 14 from being damaged,
The quality of the rotation speed detecting device can be maintained. The interference between the large-diameter cylindrical portion 15 and the axially outer edge of the second outer raceway 10 as described above is achieved by restricting the dimensions of the constituent members. There is no trouble in assembling the encoder 14 or the cost of each component. For this reason, the manufacturing cost of the rolling bearing unit with the rotation speed detecting device can be reduced as much as the work of assembling the inner ring 2 and the hub 1 with the encoder 14 can be easily performed.
【００２１】尚、図示の例は、駆動輪（ＦＲ車及びＲＲ
車の後輪、ＦＦ車の前輪、４ＷＤ車の全輪）支持用の転
がり軸受ユニットに本発明を適用した場合に就いて述べ
たが、本発明は、従動輪（ＦＲ車及びＲＲ車の前輪、Ｆ
Ｆ車の後輪）支持用の転がり軸受ユニットにも適用でき
る。又、本発明の特徴は、予めエンコーダ１４を支持固
定した内輪２を、このエンコーダ１４が破損等しない様
にしつつ外輪３の内側に挿入できる様にすべく、各部材
の寸法を規制する点にある。回転速度検出装置の種類は
特に限定するものではない。従って、回転速度検出装置
は、図示の各例の様な磁気検知式のものに限らず、渦電
流式、光電式等、他の構造のものを採用する事もでき
る。In the example shown, the driving wheels (FR vehicle and RR
Although the present invention has been described in the case where the present invention is applied to a rolling bearing unit for supporting a rear wheel of a vehicle, a front wheel of an FF vehicle, and all wheels of a 4WD vehicle, the present invention relates to a driven wheel (a front wheel of an FR vehicle and an RR vehicle). , F
The present invention can also be applied to a rolling bearing unit for supporting (rear wheel) of an F vehicle. Also, the feature of the present invention is that the dimensions of each member are regulated so that the inner ring 2 previously supporting and fixing the encoder 14 can be inserted inside the outer ring 3 while preventing the encoder 14 from being damaged or the like. is there. The type of the rotation speed detecting device is not particularly limited. Therefore, the rotation speed detecting device is not limited to the magnetic detection type as shown in each of the examples shown in the drawings, but may be another type such as an eddy current type or a photoelectric type.
【００２２】[0022]
【発明の効果】本発明は、以上に述べた通り構成され作
用するので、回転速度検出装置付転がり軸受ユニットの
品質保持とコスト低減とを両立させる事ができる。Since the present invention is constructed and operates as described above, it is possible to achieve both quality maintenance and cost reduction of the rolling bearing unit with the rotation speed detecting device.
【図１】本発明の実施の形態の１例を示す、図２のＡ−
Ａ断面図。FIG. 1 shows one example of an embodiment of the present invention,
A sectional drawing.
【図２】図１の左方から見た図。FIG. 2 is a diagram viewed from the left side of FIG. 1;
【図３】組み付け作業の途中の状態を示す、図１の左上
部に相当する部分断面図。FIG. 3 is a partial cross-sectional view corresponding to an upper left part of FIG. 1, showing a state in the middle of an assembling operation.
１ ハブ ２ 内輪 ３ 外輪 ４ 転動体 ５ フランジ ６ 第一の内輪軌道 ７ 段部 ８ 第二の内輪軌道 ９ 第一の外輪軌道 １０ 第二の外輪軌道 １１ 小径部 １２ 保持器 １３ 取付部 １４ エンコーダ １５ 大径円筒部 １６ 小径円筒部 １７ 連続部 １８ 透孔 １９ 取付孔 ２０ センサ ２１ 取付面 ２２ 面取り部 ２３ 取付部 ２４ ねじ ２５ Ｏリング ２６ シールリング ２７ スプライン孔 REFERENCE SIGNS LIST 1 hub 2 inner ring 3 outer ring 4 rolling element 5 flange 6 first inner ring track 7 step 8 second inner ring track 9 first outer ring track 10 second outer ring track 11 small diameter section 12 retainer 13 mounting section 14 encoder 15 Large-diameter cylindrical portion 16 Small-diameter cylindrical portion 17 Continuous portion 18 Through hole 19 Mounting hole 20 Sensor 21 Mounting surface 22 Chamfered portion 23 Mounting portion 24 Screw 25 O-ring 26 Seal ring 27 Spline hole
Claims (1)
一の内輪の一端部外周面に設けられた、この第一の内輪
に車輪を支持固定する為のフランジと、上記第一の内輪
の中間部外周面に、直接又はこの第一の内輪と別体の内
輪を介して形成した第一の内輪軌道と、上記第一の内輪
の他端部に形成された、この第一の内輪軌道を形成した
部分よりも外径寸法が小さくなった段部と、外周面に第
二の内輪軌道を形成して上記段部に外嵌固定された第二
の内輪と、内周面に上記第一の内輪軌道に対向する第一
の外輪軌道及び上記第二の内輪軌道に対向する第二の外
輪軌道を有し、使用時にも回転しない外輪と、この外輪
を懸架装置に取り付けるべく、この外輪の外周面に設け
られた取付部と、上記第一、第二の内輪軌道と上記第
一、第二の外輪軌道との間に、それぞれ複数個ずつ設け
られた転動体と、互いに同心の大径円筒部と小径円筒部
とこれら両円筒部同士を連続させる連続部とから成り、
上記大径円筒部の外周面の円周方向に亙る特性を交互に
且つ等間隔に変化させ、上記小径円筒部を上記第二の内
輪の外周面の一部で上記第二の内輪軌道から外れた部分
に、上記大径円筒部を上記第一の内輪軌道側に向けた状
態で外嵌固定する事により上記複列に設けられた転動体
の列の間部分に、上記第一、第二の内輪と同心に配置さ
れたエンコーダと、検出部を有し、この検出部を上記エ
ンコーダの大径円筒部の外周面に対向させた状態で上記
外輪の軸方向中間部に設けた取付孔内に支持され、上記
大径円筒部の外周面の特性の変化に対応して出力信号を
変化させるセンサとを備え、上記段部と上記第二の内輪
との嵌合部の軸方向寸法を、上記第二の外輪軌道の外輪
の中央側の端縁と上記大径円筒部の先端縁との軸方向に
亙る間隔よりも大きくし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 first inner ring which rotates during use; a flange provided on an outer peripheral surface of one end of the first inner ring for supporting and fixing a wheel to the first inner ring; A first inner ring raceway formed directly or via an inner ring separate from the first inner ring on an intermediate portion outer peripheral surface of the inner ring, and a first inner ring track formed on the other end of the first inner ring. A stepped portion having an outer diameter smaller than that of the portion forming the inner ring raceway, a second inner ring formed externally on the stepped portion by forming a second inner raceway on the outer peripheral surface, and an inner peripheral surface. Having an outer raceway facing the first inner raceway and a second outer raceway facing the second inner raceway, an outer race that does not rotate during use, and mounting the outer race to a suspension device, The mounting portion provided on the outer peripheral surface of the outer ring, the first and second inner raceways and the first and second outer raceways, In between, a plurality of rolling elements provided respectively, a large-diameter cylindrical portion and a small-diameter cylindrical portion concentric with each other, and a continuous portion that connects these two cylindrical portions,
The characteristics of the outer peripheral surface of the large-diameter cylindrical portion in the circumferential direction are alternately and equally changed, and the small-diameter cylindrical portion is displaced from the second inner raceway at a part of the outer peripheral surface of the second inner race. In the portion between the rows of rolling elements provided in the double row by externally fitting and fixing the large-diameter cylindrical section toward the first inner ring raceway side, An encoder disposed concentrically with the inner ring of the encoder, and a detector, wherein the detector is opposed to the outer peripheral surface of the large-diameter cylindrical portion of the encoder, and is provided in a mounting hole provided at an axially intermediate portion of the outer ring. And a sensor that changes an output signal in response to a change in the characteristic of the outer peripheral surface of the large-diameter cylindrical portion, and an axial dimension of a fitting portion between the step portion and the second inner ring, The distance between the center edge of the outer ring of the second outer ring raceway and the leading edge of the large-diameter cylindrical portion is greater than the axial distance. Speed sensing rolling bearing unit, characterized in that had comb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9216485A JPH1164356A (en) | 1997-08-11 | 1997-08-11 | Rolling bearing unit with rotational speed detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9216485A JPH1164356A (en) | 1997-08-11 | 1997-08-11 | Rolling bearing unit with rotational speed detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1164356A true JPH1164356A (en) | 1999-03-05 |
Family
ID=16689177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9216485A Pending JPH1164356A (en) | 1997-08-11 | 1997-08-11 | Rolling bearing unit with rotational speed detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1164356A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010048349A (en) * | 2008-08-22 | 2010-03-04 | Ntn Corp | Sensor-equipped bearing apparatus for wheel |
| CN107449450A (en) * | 2017-09-09 | 2017-12-08 | 尔智机器人（上海）有限公司 | A kind of magnetism encoder and joint |
-
1997
- 1997-08-11 JP JP9216485A patent/JPH1164356A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010048349A (en) * | 2008-08-22 | 2010-03-04 | Ntn Corp | Sensor-equipped bearing apparatus for wheel |
| CN107449450A (en) * | 2017-09-09 | 2017-12-08 | 尔智机器人（上海）有限公司 | A kind of magnetism encoder and joint |
| CN107449450B (en) * | 2017-09-09 | 2024-04-23 | 尔智机器人(珠海)有限公司 | Magneto-electric encoder and joint |
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