JPH0826084A - Rolling bearing unit equipped with revolition speed detecting device - Google Patents
Rolling bearing unit equipped with revolition speed detecting deviceInfo
- Publication number
- JPH0826084A JPH0826084A JP16563294A JP16563294A JPH0826084A JP H0826084 A JPH0826084 A JP H0826084A JP 16563294 A JP16563294 A JP 16563294A JP 16563294 A JP16563294 A JP 16563294A JP H0826084 A JPH0826084 A JP H0826084A
- Authority
- JP
- Japan
- Prior art keywords
- inner ring
- tone wheel
- peripheral surface
- wheel
- bearing unit
- 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
Landscapes
- Regulating Braking Force (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】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 is used for rotatably supporting a vehicle wheel on a suspension device and 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
在に支持すると共に、アンチロックブレーキシステム
(ABS)、或はトラクションコントロールシステム
(TCS)を制御する為に、この車輪の回転速度を検出
する為の回転速度検出装置付転がり軸受ユニットとし
て、例えば実開平3−99676号公報には、図4に示
す様な構造が記載されている。2. Description of the Related Art An automobile wheel is rotatably supported by a suspension system and the rotational speed of the wheel is detected in order to control an antilock brake system (ABS) or a traction control system (TCS). As a rolling bearing unit with a rotation speed detecting device for carrying out the above, for example, Japanese Utility Model Laid-Open No. 3-99676 discloses a structure as shown in FIG.
【0003】この図4に示した回転速度検出装置付転が
り軸受ユニットは、外端部(図4の左端部)に車輪固定
用のフランジ部1を有し、中間部外周面に第一の内輪軌
道2aを形成したハブ3と、外周面に第二の内輪軌道2
bを有し、このハブ3の中間部外周面に外嵌された内輪
部材4と、上記ハブ3の内端部(図4の右端部)外周面
に形成された雄ねじ部5に螺合し、螺合に伴って上記内
輪部材4の内端面を押圧し、この内輪部材4をハブ3の
外周面の所定位置に固定するナット6と、図示しない懸
架装置に支持する為の取付部7を外周面に有し、内周面
に複列の外輪軌道8a、8bを形成した外輪部材9と、
上記ハブ3と外輪部材9との間に設けられた複数の転動
体10、10とを有する。そして、懸架装置に支持され
る外輪部材9の内側に、車輪を固定するハブ3を回転自
在に支持する。The rolling bearing unit with a rotation speed detecting device shown in FIG. 4 has a flange portion 1 for fixing a wheel at an outer end portion (a left end portion in FIG. 4) and a first inner ring on an outer peripheral surface of an intermediate portion. The hub 3 having the raceway 2a and the second inner ring raceway 2 on the outer peripheral surface
b, which is externally fitted to the outer peripheral surface of the intermediate portion of the hub 3, and is screwed to the male screw portion 5 formed on the outer peripheral surface of the inner end portion (right end portion in FIG. 4) of the hub 3. , A nut 6 for pressing the inner end surface of the inner ring member 4 in accordance with the screwing and fixing the inner ring member 4 at a predetermined position on the outer peripheral surface of the hub 3, and a mounting portion 7 for supporting a suspension device (not shown). An outer ring member 9 which is provided on the outer peripheral surface and has double rows of outer ring raceways 8a and 8b formed on the inner peripheral surface;
It has a plurality of rolling elements 10 and 10 provided between the hub 3 and the outer ring member 9. Then, the hub 3 for fixing the wheels is rotatably supported inside the outer ring member 9 supported by the suspension device.
【0004】上記内輪部材4の内半部には円筒状のトー
ンホイール11の基端部(図4の左端部)を外嵌固定し
ている。このトーンホイール11の先半部(図4の右半
部)内端面には、除肉部である複数の切り欠きを円周方
向に亙って等間隔に形成している。尚、上記トーンホイ
ール11の先半部外周面は、非磁性材製の補強材12に
より覆っている。又、上記外輪部材9の内端開口部に、
この開口部を覆った状態で装着したカバー13にはセン
サ14を固定し、このセンサ14の先端部を、上記トー
ンホイール11の先半部内周面に対向させている。A base end portion (left end portion in FIG. 4) of a cylindrical tone wheel 11 is externally fitted and fixed to an inner half portion of the inner ring member 4. On the inner end surface of the first half portion (right half portion in FIG. 4) of the tone wheel 11, a plurality of cutouts, which are thinned portions, are formed at equal intervals in the circumferential direction. The outer peripheral surface of the first half of the tone wheel 11 is covered with a reinforcing material 12 made of a non-magnetic material. Further, in the inner end opening of the outer ring member 9,
A sensor 14 is fixed to the cover 13 mounted in a state of covering the opening, and the tip end of the sensor 14 is opposed to the inner peripheral surface of the first half of the tone wheel 11.
【0005】上述した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、ハブ3の外端部に設けられた
フランジ部1に固定された車輪を、外輪部材9を支持し
た懸架装置に対して回転自在に支持する。又、車輪の回
転に伴って、内輪部材4に外嵌固定したトーンホイール
11が回転すると、このトーンホイール11の先半部で
複数の切り欠きを形成した部分に対向したセンサ14の
出力が変化する。このセンサ14の出力が変化する周波
数は車輪の回転速度に比例する為、センサ14の出力信
号を図示しない制御器に入力すれば、上記車輪の回転速
度を求め、ABSやTCSを適切に制御できる。When the rolling bearing unit with the rotational speed detecting device as described above is used, the wheel fixed to the flange portion 1 provided at the outer end portion of the hub 3 is mounted on the suspension device supporting the outer ring member 9. Support rotatably. Further, when the tone wheel 11 fitted and fixed to the inner ring member 4 rotates with the rotation of the wheel, the output of the sensor 14 facing the portion where the plurality of cutouts are formed in the first half of the tone wheel 11 changes. To do. Since the frequency at which the output of the sensor 14 changes is proportional to the rotation speed of the wheel, if the output signal of the sensor 14 is input to a controller (not shown), the rotation speed of the wheel can be obtained and the ABS or TCS can be appropriately controlled. .
【0006】[0006]
【発明が解決使用とする課題】ところが、上述の様に構
成され作用する従来の回転速度検出装置付転がり軸受ユ
ニットの場合には、次の様な解決すべき点がある。即
ち、図4に示した従来構造の場合、単なる円筒状のトー
ンホイール11を内輪部材4に外嵌しただけである為、
このトーンホイール11の設置位置が不用意にずれる可
能性があった。例えば、回転速度検出装置付転がり軸受
ユニットの製造工程途中で、上記トーンホイール11の
組み付け後、カバー13の装着前に、上記トーンホイー
ル11の先端部が何らかの物品にぶつかった場合、この
トーンホイール11の軸方向(図4の左右方向)に亙る
取付位置がずれたり、或はこのトーンホイール11の中
心軸とハブ3の中心軸とが不一致になってしまう。この
様に、トーンホイール11の取付位置がずれると、回転
速度検出装置本来の機能を発揮できなくなる。However, in the case of the conventional rolling bearing unit with a rotation speed detecting device which is constructed and operates as described above, there are the following points to be solved. That is, in the case of the conventional structure shown in FIG. 4, since the cylindrical tone wheel 11 is simply fitted onto the inner ring member 4,
There is a possibility that the installation position of the tone wheel 11 may be carelessly displaced. For example, in the process of manufacturing a rolling bearing unit with a rotation speed detecting device, after the tone wheel 11 is assembled and before the cover 13 is mounted, the tip end of the tone wheel 11 hits any article, the tone wheel 11 The mounting position may be displaced in the axial direction (left and right direction in FIG. 4), or the center axis of the tone wheel 11 and the center axis of the hub 3 may not coincide with each other. In this way, if the mounting position of the tone wheel 11 is displaced, the original function of the rotation speed detection device cannot be exerted.
【0007】又、軸方向に亙って押し込まれたトーンホ
イール11の端縁と転動体10、10とが干渉した場合
には、この転動体10、10の転動面に傷が付いて、転
がり軸受ユニット部分の寿命を著しく低下させる可能性
もある。When the edge of the tone wheel 11 pushed in the axial direction interferes with the rolling elements 10 and 10, the rolling surfaces of the rolling elements 10 and 10 are damaged, There is also a possibility that the life of the rolling bearing unit part may be significantly reduced.
【0008】更に、単なる円筒状に形成されたトーンホ
イール11は、直径方向に亙る力により比較的容易に変
形する。この為、自動車の走行時や制動時に発生する振
動等により、上記トーンホイール11の外周面とセンサ
14との距離が変化し、回転速度と関係のない出力が発
生し、正しい回転速度検出を行えなくなる可能性があ
る。本発明の回転速度検出装置付転がり軸受ユニット
は、この様な事情に鑑みて発明したものである。Further, the tone wheel 11, which is formed in a simple cylindrical shape, is relatively easily deformed by the force in the diametrical direction. Therefore, the distance between the outer peripheral surface of the tone wheel 11 and the sensor 14 changes due to vibration or the like generated when the vehicle is running or braking, and an output irrelevant to the rotation speed is generated, so that the correct rotation speed can be detected. It may disappear. The rolling bearing unit with a rotation speed detecting device of the present invention was invented in view of such circumstances.
【0009】[0009]
【課題を解決する為の手段】本発明の回転速度検出装置
付転がり軸受ユニットは、前述した従来の回転速度検出
装置付転がり軸受ユニットと同様に、内周面に外輪軌道
を有する、回転しない外輪と、外周面に内輪軌道を有す
る、使用時に回転する内輪と、上記外輪軌道と内輪軌道
との間に設けられた複数の転動体と、上記内輪に支持さ
れて使用時に回転する、磁性材製で円筒状のトーンホイ
ールと、上記外輪に支持されてこのトーンホイールの外
周面に対向する、回転しないセンサとを備えている。A rolling bearing unit with a rotation speed detecting device according to the present invention has a non-rotating outer ring having an outer ring raceway on its inner peripheral surface, like the above-described conventional rolling bearing unit with a rotating speed detecting device. An inner ring that has an inner ring raceway on its outer peripheral surface and that rotates during use; a plurality of rolling elements provided between the outer ring raceway and the inner ring raceway; and a magnetic material that is supported by the inner ring and rotates during use. And a cylindrical tone wheel, and a non-rotating sensor that is supported by the outer ring and faces the outer peripheral surface of the tone wheel.
【0010】特に、本発明の回転速度検出装置付転がり
軸受ユニットに於いては、上記トーンホイールは、互い
に同心の小径部と大径部とを段部で連続させたものであ
り、上記小径部には複数の除肉部が、円周方向に亙って
等間隔に形成されている。そして、上記大径部は上記内
輪の端部に外嵌固定されており、上記段部は上記内輪の
端縁に突き当たっている。Particularly, in the rolling bearing unit with a rotation speed detecting device of the present invention, the tone wheel is such that the small diameter portion and the large diameter portion, which are concentric with each other, are continuous at the step portion, and the small diameter portion is the same. A plurality of thinned portions are formed in the circumferential direction at equal intervals. The large-diameter portion is externally fitted and fixed to the end portion of the inner ring, and the step portion abuts on the end edge of the inner ring.
【0011】[0011]
【作用】上述の様に構成される本発明の回転速度検出装
置付転がり軸受ユニットが、内輪に固定された車輪等を
回転自在に支持する際の作用、並びにこの内輪の回転速
度を検出する際の作用は、前述した従来構造と同様であ
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、トーンホイールを構成する小径部と大
径部とを連続させる段部が内輪の端縁と突き当たってい
る為、このトーンホイールの先端が他の物品に衝突した
場合でも、このトーンホイールの取付位置がずれる事が
なくなり、取付位置不良に基づく検出精度の悪化を防止
できる。又、トーンホイールと転動体とが干渉する事も
なく、転動面の損傷に基づく耐久性低下を防止できる。
更に、上記段部の存在に基づき、直径方向に亙る力に対
するトーンホイールの剛性は、単なる円筒状のトーンホ
イールに比べて大きい。この為、上記トーンホイールの
外周面とセンサとの距離が、回転速度に関係なく変化す
る事がなくなって、正しい回転速度検出を行える様にな
る。When the rolling bearing unit with a rotation speed detecting device of the present invention constructed as described above rotatably supports a wheel or the like fixed to the inner ring, and when detecting the rotation speed of the inner ring. The operation of is similar to that of the conventional structure described above. In particular, in the case of the rolling bearing unit with a rotation speed detecting device of the present invention, the step portion that connects the small diameter portion and the large diameter portion forming the tone wheel is in contact with the edge of the inner ring, so that the tone wheel Even if the tip collides with another article, the mounting position of the tone wheel will not be displaced, and it is possible to prevent deterioration of detection accuracy due to defective mounting position. Further, the tone wheel and the rolling elements do not interfere with each other, and it is possible to prevent deterioration of durability due to damage of the rolling surface.
Further, due to the presence of the stepped portion, the rigidity of the tone wheel with respect to the force over the diametrical direction is larger than that of a simple cylindrical tone wheel. Therefore, the distance between the outer peripheral surface of the tone wheel and the sensor does not change regardless of the rotation speed, and the correct rotation speed can be detected.
【0012】[0012]
【実施例】図1〜2は本発明の第一実施例を示してい
る。ハブ3の外端部(車両への組み付け状態で幅方向外
側となる端部を言い、第1図の左端部)外周面には、車
輪を固定する為のフランジ部1を形成し、中間部外周面
には、第一の内輪軌道2aと段部15とを形成してい
る。又、このハブ3の外周面には、その外周面に第二の
内輪軌道2bを形成した内輪部材4を、その外端面(第
1図の左端面)を上記段部15に突き当てた状態で、外
嵌支持している。尚、上記第一の内輪軌道2aは、ハブ
3の外周面に直接形成する代りに、ハブ3とは別体の内
輪部材(図示せず)に形成し、この内輪部材と上記内輪
部材4とを、ハブ3に外嵌固定する事もできる。1 and 2 show a first embodiment of the present invention. A flange portion 1 for fixing a wheel is formed on an outer peripheral surface of the hub 3 (which is an end portion which is an outer side in the width direction when assembled to a vehicle, and is a left end portion in FIG. 1), and an intermediate portion. A first inner ring raceway 2a and a step portion 15 are formed on the outer peripheral surface. Further, a state in which an inner ring member 4 having a second inner ring raceway 2b formed on the outer peripheral surface of the hub 3 and an outer end surface (the left end surface in FIG. 1) of the inner ring member 4 is abutted against the step portion 15 So, it is supported by external fitting. The first inner ring raceway 2a is formed on an inner ring member (not shown) separate from the hub 3, instead of being formed directly on the outer peripheral surface of the hub 3, and the inner ring member and the inner ring member 4 are connected to each other. Can also be externally fitted and fixed to the hub 3.
【0013】又、ハブ3の内端寄り部分には雄ねじ部1
6を形成している。この雄ねじ部16にはナット6を螺
合し、更に緊締する事で、上記内輪部材4をハブ3の外
周面の所定部分に固定している。ハブ3の周囲に配置さ
れた外輪部材9の中間部外周面には、この外輪部材9を
懸架装置に固定する為の取付部7を設けている。又、こ
の外輪部材9の内周面には、それぞれが上記第一、第二
の内輪軌道2a、2bに対向する、外輪軌道8a、8b
を形成している。そして、第一、第二の内輪軌道2a、
2bと1対の外輪軌道8a、8bとの間に、それぞれ複
数の転動体10、10を設けて、外輪部材9の内側での
ハブ3の回転を自在としている。A male screw portion 1 is provided on a portion near the inner end of the hub 3.
6 is formed. The inner ring member 4 is fixed to a predetermined portion of the outer peripheral surface of the hub 3 by screwing a nut 6 into the male screw portion 16 and further tightening the nut 6. A mounting portion 7 for fixing the outer ring member 9 to the suspension device is provided on the outer peripheral surface of the intermediate portion of the outer ring member 9 arranged around the hub 3. Further, on the inner peripheral surface of the outer ring member 9, the outer ring raceways 8a and 8b respectively face the first and second inner ring raceways 2a and 2b.
Is formed. Then, the first and second inner ring raceways 2a,
A plurality of rolling elements 10 and 10 are provided between 2b and the pair of outer ring raceways 8a and 8b, respectively, so that the hub 3 can freely rotate inside the outer ring member 9.
【0014】又、上記外輪部材9の外端部内周面と、ハ
ブ3の外周面との間には、シールリング17を装着し
て、外輪部材9の内周面と上記ハブ3の外周面との間に
存在し、上記複数の転動体10、10を設けた空間の外
端開口部を塞いでいる。又、上記内輪部材4の内端部
(車両への組み付け状態で幅方向中央寄りとなる端部を
言い、図1〜2で右端部)で第二の内輪軌道2bから外
れた部分に、トーンホイール22の基端部(図1〜2の
左端部)を外嵌固定している。このトーンホイール22
は、鋼板等の磁性金属板により全体を円筒状に形成して
いる。又、このトーンホイール22は、互いに同心に形
成された小径部23と大径部24とを段部25により連
続させて成る。A seal ring 17 is mounted between the inner peripheral surface of the outer end portion of the outer ring member 9 and the outer peripheral surface of the hub 3 so that the inner peripheral surface of the outer ring member 9 and the outer peripheral surface of the hub 3. And the outer end opening of the space where the plurality of rolling elements 10 and 10 are provided is closed. Further, at the inner end portion of the inner ring member 4 (referred to as the end portion that is closer to the center in the width direction when assembled to a vehicle, the right end portion in FIGS. 1 and 2), a tone is formed at a portion deviated from the second inner ring raceway 2 b. The base end portion (the left end portion in FIGS. 1 and 2) of the wheel 22 is externally fitted and fixed. This tone wheel 22
Is formed of a magnetic metal plate such as a steel plate in a cylindrical shape as a whole. Further, the tone wheel 22 is composed of a small-diameter portion 23 and a large-diameter portion 24, which are concentrically formed with each other, connected by a step portion 25.
【0015】この様なトーンホイール22は、上記大径
部24を内輪部材4の内端部外周面に外嵌し、上記段部
25をこの内輪部材4の内端縁部に当接させた状態で、
この内輪部材4に支持固定している。従って上記小径部
23は、上記内輪部材4と同心に支持される。そして、
この小径部23に、透孔26或は切り欠き等の除肉部
を、円周方向に亙り等間隔に形成している。各透孔26
は同形状で、例えば軸方向(図1〜2の左右方向)に長
い矩形としている。尚、上記内輪部材4及びこの内輪部
材4を外嵌固定したハブ3が、特許請求の範囲に記載し
た内輪に相当する。In such a tone wheel 22, the large diameter portion 24 is fitted onto the outer peripheral surface of the inner end portion of the inner ring member 4, and the step portion 25 is brought into contact with the inner end edge portion of the inner ring member 4. In the state
The inner ring member 4 is supported and fixed. Therefore, the small diameter portion 23 is supported concentrically with the inner ring member 4. And
In this small-diameter portion 23, through-holes 26 or cut-out portions such as notches are formed in the circumferential direction at equal intervals. Each through hole 26
Have the same shape, for example, a rectangular shape that is long in the axial direction (the horizontal direction in FIGS. 1 and 2). The inner ring member 4 and the hub 3 to which the inner ring member 4 is externally fitted and fixed correspond to the inner ring described in the claims.
【0016】一方、外輪部材9の内端開口部はカバー2
7で塞ぐ事により、この内端開口部から外輪部材9内へ
の塵芥や雨水の進入防止を図っている。このカバー27
は、ステンレス鋼板等の金属板を絞り加工する等により
造られている。このカバー27は、外端部が開口してお
り、外周面の開口寄り部分には、フランジ状の係止突条
28を有する。カバー27の開口部の自由状態での外径
は、外輪部材9の内端開口部の内径と同じか、これより
も僅かに大きくしている。この結果、上記カバー27の
開口寄り部分は、上記係止突条28が外輪部材9の内端
面に突き当たる迄、上記外輪部材9の内端開口部に内嵌
自在である。On the other hand, the inner end opening of the outer ring member 9 is covered by the cover 2.
Blocking with 7 prevents the entry of dust and rainwater into the outer ring member 9 from the inner end opening. This cover 27
Is made by drawing a metal plate such as a stainless steel plate. An outer end portion of the cover 27 is opened, and a flange-shaped locking protrusion 28 is provided on a portion of the outer peripheral surface near the opening. The outer diameter of the opening of the cover 27 in the free state is equal to or slightly larger than the inner diameter of the inner end opening of the outer ring member 9. As a result, the portion of the cover 27 near the opening can be fitted in the inner end opening of the outer ring member 9 until the locking projection 28 hits the inner end surface of the outer ring member 9.
【0017】そして、このカバー27内にはセンサ14
を、位置規制した状態で保持固定している。このセンサ
14の出力信号は、上記カバー27の外面に設けたコネ
クタ29に接続した導線(図示せず)を通じて取り出さ
れる。又、このセンサ14の検出部30は、上記カバー
27の直径方向内方に向いている。この検出部30は、
上記カバー27を前記外輪部材9の内端部に嵌合固定し
た状態で、上記小径部23の外周面に、0.5〜1.0
mm程度の微小隙間31を介して対向する。The sensor 14 is provided in the cover 27.
Is held and fixed in a state where the position is regulated. The output signal of the sensor 14 is taken out through a lead wire (not shown) connected to a connector 29 provided on the outer surface of the cover 27. The detecting portion 30 of the sensor 14 faces inward in the diameter direction of the cover 27. This detection unit 30
With the cover 27 fitted and fixed to the inner end portion of the outer ring member 9, 0.5 to 1.0 is formed on the outer peripheral surface of the small diameter portion 23.
It opposes via a minute gap 31 of about mm.
【0018】上述の様に構成され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、懸架装置に対して
車輪を回転自在に支持すると共に、ハブ3のフランジ部
1に固定された車輪の回転速度を検出する際の作用自体
は、前述した従来の回転速度検出装置付転がり軸受ユニ
ットと同様である。The rolling bearing unit with a rotation speed detecting device of the present invention configured as described above rotatably supports the wheel with respect to the suspension device and rotates the wheel fixed to the flange portion 1 of the hub 3. The operation itself at the time of detecting the speed is the same as that of the above-described conventional rolling bearing unit with a rotation speed detecting device.
【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、トーンホイール22を構成する小
径部23と大径部24とを連続させる段部25が内輪部
材4の内端縁と突き当たっている為、回転速度検出装置
付転がり軸受ユニットの組立途中に、上記トーンホイー
ル22の先端部で前記外輪部材9の内端開口から突出し
た部分が、他の物品に衝突した場合でも、このトーンホ
イール22の取付位置がずれる事がなくなる。この結
果、トーンホイール22の取付け不良に基づく不良品の
発生を防止でき、製品の歩留向上を図れる。Particularly, in the case of the rolling bearing unit with the rotation speed detecting device of the present invention, the step portion 25 which connects the small diameter portion 23 and the large diameter portion 24 forming the tone wheel 22 abuts the inner end edge of the inner ring member 4. Therefore, even if a portion of the tip end portion of the tone wheel 22 protruding from the inner end opening of the outer ring member 9 collides with another article during the assembly of the rolling bearing unit with the rotation speed detecting device, this tone is generated. The mounting position of the wheel 22 will not be displaced. As a result, it is possible to prevent defective products due to defective mounting of the tone wheel 22, and to improve the product yield.
【0020】又、上記大径部24の軸方向に亙る寸法
は、上記内輪部材4の内端部で第二の内輪軌道2bから
外れた部分(肩部)の軸方向に亙る寸法よりも小さい
為、この大径部24の端縁と転動体10、10とが干渉
する事はない。即ち、トーンホイール22を内輪部材4
に装着した後、このトーンホイール22が内輪部材22
に向けて押された場合でも、上記段部25と内輪部材4
の内端縁との係合により、上記大径部24の端縁が上記
第二の内輪軌道2b部分にまで入り込む事がない。従っ
て、トーンホイール22により転動体10、10の転動
面が傷められる事がなく、転がり軸受ユニット部分の耐
久性を十分に確保できる。Further, the axial dimension of the large-diameter portion 24 is smaller than the axial dimension of the portion (shoulder portion) of the inner end portion of the inner ring member 4 which deviates from the second inner ring raceway 2b. Therefore, the edge of the large diameter portion 24 does not interfere with the rolling elements 10 and 10. That is, the tone wheel 22 is connected to the inner ring member 4
After the tone wheel 22 is attached to the inner ring member 22
Even when it is pushed toward, the step 25 and the inner ring member 4
Due to the engagement with the inner end edge of the above, the end edge of the large diameter portion 24 does not enter the portion of the second inner ring raceway 2b. Therefore, the rolling surfaces of the rolling elements 10, 10 are not damaged by the tone wheel 22, and the durability of the rolling bearing unit can be sufficiently ensured.
【0021】更に、上記段部25の存在に基づき、直径
方向に亙る力に対するトーンホイール22の剛性は、前
述した従来構造に組み込まれた様な、単なる円筒状のト
ーンホイール11(図4)に比べて大きい。この為、上
記走行時や制動時の振動により上記トーンホイール22
が変形する事がなくなり、このトーンホイール22の外
周面と前記センサ14の検出部30との距離(前記微小
隙間31の厚さ)が、回転速度に関係なく変化する事が
なくなる。この結果、上記走行時や制動時の振動に拘ら
ず、正しい回転速度検出を行える様になる。Further, due to the existence of the stepped portion 25, the rigidity of the tone wheel 22 against the force in the diametrical direction is the same as that of the simple tone wheel 11 (FIG. 4) which is the same as that incorporated in the above-mentioned conventional structure. Big compared to. For this reason, the tone wheel 22 is affected by the vibration during traveling or braking.
Is not deformed, and the distance between the outer peripheral surface of the tone wheel 22 and the detection portion 30 of the sensor 14 (the thickness of the minute gap 31) does not change regardless of the rotation speed. As a result, the correct rotation speed can be detected regardless of the above-mentioned vibrations during traveling and braking.
【0022】又、トーンホイール22本来の機能を有す
る小径部23の外径を、前述した従来構造に組み込まれ
たトーンホイール11(図4)の外径よりも、上記段部
25の段差分だけ小さくできる。従って、この小径部2
3の外周面とカバー27の内周面との間に存在する空間
部分の直径方向に亙る厚さ寸法を大きくできて、この空
間部分に比較的大きなセンサ14を装着できる。そし
て、センサ14を大型化できる分、このセンサ14の出
力を大きくできて、回転速度検出の信頼性向上を図れ
る。Further, the outer diameter of the small-diameter portion 23 having the original function of the tone wheel 22 is larger than the outer diameter of the tone wheel 11 (FIG. 4) incorporated in the above-mentioned conventional structure by the step difference of the step 25. Can be made smaller. Therefore, this small diameter portion 2
The thickness of the space existing between the outer peripheral surface of No. 3 and the inner peripheral surface of the cover 27 in the diametrical direction can be increased, and a relatively large sensor 14 can be mounted in this space. As the sensor 14 can be made larger, the output of the sensor 14 can be increased and the reliability of the rotation speed detection can be improved.
【0023】次に、図3は本発明の第二実施例を示して
いる。本実施例の場合には、トーンホイール22aを2
段に亙って絞る事により、小径部23aの直径を、上述
した第一実施例の場合に比べて小さくしている。そし
て、この様に小径部23aの直径を小さくした分だけ、
センサ14の直径方向(図3の上下方向)に亙る厚さ寸
法を大きくしている。従って、本実施例の場合には、上
述した第一実施例の場合以上に、センサ14の出力を大
きくできて、回転速度検出の信頼性向上を図れる。Next, FIG. 3 shows a second embodiment of the present invention. In the case of this embodiment, the tone wheel 22a is set to 2
By narrowing down the steps, the diameter of the small diameter portion 23a is made smaller than in the case of the first embodiment described above. Then, as the diameter of the small diameter portion 23a is reduced in this way,
The thickness dimension of the sensor 14 in the diameter direction (vertical direction in FIG. 3) is increased. Therefore, in the case of the present embodiment, the output of the sensor 14 can be increased and the reliability of the rotation speed detection can be improved more than in the case of the first embodiment described above.
【0024】尚、本発明の回転速度検出装置付き転がり
軸受ユニットを構成するトーンホイールは、加工費が安
い金属板のプレス加工、或は燒結により造る事が可能で
ある。又、図示の各実施例は何れも、非駆動輪(FR車
の前輪、FF車の後輪)を支持する為の軸受ユニットに
本発明を適用した状態を示している為、センサ14を支
持するカバー27はその内端部を密閉した形状としてい
る。但し、本発明は、この様な非駆動輪用の軸受ユニッ
トに限らず、駆動輪(FR車の後輪、FF車の前輪)用
の軸受ユニットにも適用できる。この様に駆動輪用の軸
受ユニットに本発明を適用する場合には、カバーを円輪
状に形成してその中央部に等速ジョイントの一部を挿通
する為の円孔を設ける。又、ハブを円筒形にして、その
内周面に駆動軸の外周面の雄スプライン溝と係合させる
為の雌スプライン溝を形成する。The tone wheel constituting the rolling bearing unit with the rotation speed detecting device of the present invention can be manufactured by pressing a metal plate, which has a low processing cost, or by sintering. Further, in each of the illustrated embodiments, since the present invention is applied to the bearing unit for supporting the non-driving wheels (the front wheels of the FR vehicle and the rear wheels of the FF vehicle), the sensor 14 is supported. The cover 27 has a shape in which its inner end is sealed. However, the present invention is not limited to such bearing units for non-driving wheels, but can also be applied to bearing units for driving wheels (rear wheels of FR vehicles, front wheels of FF vehicles). When the present invention is applied to the bearing unit for the drive wheels as described above, the cover is formed in a circular ring shape, and a circular hole for inserting a part of the constant velocity joint is provided in the central portion thereof. Further, the hub is formed into a cylindrical shape, and a female spline groove for engaging with the male spline groove on the outer peripheral surface of the drive shaft is formed on the inner peripheral surface thereof.
【0025】[0025]
【発明の効果】本発明の回転速度検出装置付転がり軸受
ユニットは、以上に述べた通り構成され作用するので、
検出精度が優れ、しかも転がり軸受ユニット部分の耐久
性が優れた構造を得られる。Since the rolling bearing unit with the rotational speed detecting device of the present invention is constructed and operates as described above,
It is possible to obtain a structure in which the detection accuracy is excellent and the rolling bearing unit portion has excellent durability.
【図1】本発明の第一実施例を示す断面図。FIG. 1 is a sectional view showing a first embodiment of the present invention.
【図2】図1の右部拡大図。FIG. 2 is an enlarged view of the right part of FIG.
【図3】本発明の第二実施例を示す、図2と同様の図。FIG. 3 is a view similar to FIG. 2, showing a second embodiment of the present invention.
【図4】従来構造の1例を示す断面図。FIG. 4 is a sectional view showing an example of a conventional structure.
1 フランジ部 2a 第一の内輪軌道 2b 第二の内輪軌道 3 ハブ 4 内輪部材 5 雄ねじ部 6 ナット 7 取付部 8a、8b 外輪軌道 9 外輪部材 10 転動体 11 トーンホイール 12 補強材 13 カバー 14 センサ 15 段部 16 雄ねじ部 17 シールリング 22、22a トーンホイール 23、23a 小径部 24 大径部 25 段部 26 透孔 27 カバー 28 係止突条 29 コネクタ 30 検出部 31 微小隙間 1 Flange 2a 1st inner ring raceway 2b 2nd inner ring raceway 3 Hub 4 Inner ring member 5 Male screw part 6 Nut 7 Attachment part 8a, 8b Outer ring raceway 9 Outer ring member 10 Rolling element 11 Tone wheel 12 Reinforcing material 13 Cover 14 Sensor 15 Step portion 16 Male screw portion 17 Seal ring 22, 22a Tone wheel 23, 23a Small diameter portion 24 Large diameter portion 25 Step portion 26 Through hole 27 Cover 28 Locking protrusion 29 Connector 30 Detection portion 31 Small gap
Claims (1)
外輪と、外周面に内輪軌道を有する、使用時に回転する
内輪と、上記外輪軌道と内輪軌道との間に設けられた複
数の転動体と、上記内輪に支持されて使用時に回転す
る、磁性材製で円筒状のトーンホイールと、上記外輪に
支持されてこのトーンホイールの外周面に対向する、回
転しないセンサとを備えた回転速度検出装置付転がり軸
受ユニットに於いて、上記トーンホイールは、互いに同
心の小径部と大径部とを段部で連続させたものであり、
上記小径部には複数の除肉部が、円周方向に亙って等間
隔に形成されており、上記大径部は上記内輪の端部に外
嵌固定されており、上記段部は上記内輪の端縁に突き当
たっている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。1. A non-rotating outer ring having an outer ring raceway on an inner peripheral surface, an inner ring having an inner ring raceway on an outer peripheral surface and rotating at the time of use, and a plurality of rolling elements provided between the outer ring raceway and the inner ring raceway. Rotation speed including a moving body, a cylindrical tone wheel made of a magnetic material, which is supported by the inner ring and rotates during use, and a non-rotating sensor which is supported by the outer ring and faces the outer peripheral surface of the tone wheel. In the rolling bearing unit with a detection device, the tone wheel is one in which a small-diameter portion and a large-diameter portion that are concentric with each other are continuous in steps.
A plurality of thinned portions are formed in the small diameter portion at equal intervals in the circumferential direction, the large diameter portion is externally fitted and fixed to the end portion of the inner ring, and the step portion is A rolling bearing unit with a rotation speed detection device, which is in contact with the edge of the inner ring.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16563294A JPH0826084A (en) | 1994-07-18 | 1994-07-18 | Rolling bearing unit equipped with revolition speed detecting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16563294A JPH0826084A (en) | 1994-07-18 | 1994-07-18 | Rolling bearing unit equipped with revolition speed detecting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0826084A true JPH0826084A (en) | 1996-01-30 |
Family
ID=15816057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16563294A Pending JPH0826084A (en) | 1994-07-18 | 1994-07-18 | Rolling bearing unit equipped with revolition speed detecting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0826084A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6174088B1 (en) | 1997-12-15 | 2001-01-16 | Nsk Ltd. | Rolling bearing unit with rotation speed sensor |
US6231241B1 (en) * | 1998-10-21 | 2001-05-15 | Nsk Ltd. | Rotation support apparatus with rotational speed sensing device |
-
1994
- 1994-07-18 JP JP16563294A patent/JPH0826084A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6174088B1 (en) | 1997-12-15 | 2001-01-16 | Nsk Ltd. | Rolling bearing unit with rotation speed sensor |
US6375359B1 (en) | 1997-12-15 | 2002-04-23 | Nsk Ltd. | Rolling bearing unit with rotation speed sensor |
US6231241B1 (en) * | 1998-10-21 | 2001-05-15 | Nsk Ltd. | Rotation support apparatus with rotational speed sensing device |
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