JP2008008463A - Rolling bearing unit with sensor - Google Patents

Rolling bearing unit with sensor Download PDF

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Publication number
JP2008008463A
JP2008008463A JP2006181957A JP2006181957A JP2008008463A JP 2008008463 A JP2008008463 A JP 2008008463A JP 2006181957 A JP2006181957 A JP 2006181957A JP 2006181957 A JP2006181957 A JP 2006181957A JP 2008008463 A JP2008008463 A JP 2008008463A
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Prior art keywords
inner ring
sensor
detected member
ring
rolling bearing
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Inventor
Katsuyuki Harada
勝之 原田
Ken Adachi
謙 安達
Masao Takimoto
将生 滝本
Tetsuya Ishikawa
鉄也 石川
Seiji Yamamoto
誠司 山本
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JTEKT Corp
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JTEKT Corp
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Priority to JP2006181957A priority Critical patent/JP2008008463A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing unit with a sensor capable of improving mounting accuracy of a sensed member and reducing costs. <P>SOLUTION: The rolling bearing unit with a sensor comprises a hub shaft 2 mounted on a wheel, an outer ring 1 fixed on a body side, a pair of first inner ring 3 and second inner ring 4 externally fitted axially with an outer side and inner side of a shaft section 2b of the hub shaft 2 respectively, a plurality of tapered rollers 5a and 5b rotatably intervened between the outer ring 1 and first and second inner rings 3 and 4 respectively, a circular sensed member 6 integrally rotated together with the hub shaft 2, and a sensor 7 for sensing rotation of the sensed member. The sensed member 6 is externally fitted on the shaft section 2b between the first inner ring 3 and second inner ring 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動車等の車輪を支持する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 that supports wheels of an automobile or the like.

例えば、自動車等の車輪を支持する転がり軸受装置には、アンチロックブレーキシステム等の制御のために、当該車輪の回転速度を検出するためのセンサが組み込まれたものがある。
このような転がり軸受装置は、図５に示すように、車輪（図示せず）を取り付ける軸方向外側のフランジ部１０２ａとその軸方向内側の軸部１０２ｂとを有するハブ軸１０２と、前記軸部１０２ｂの径方向外側に同軸状にあり車体側に固定される外輪１０１と、前記軸部１０２ｂにおいて軸方向外側と内側とに隣接して外嵌した一対の第１内輪１０３と第２内輪１０４と、外輪１０１と第１内輪１０３との間及び外輪１０１と第２内輪１０４との間にそれぞれ転動自在に介在した複数の円錐ころ１０５とを備えている。 For example, some rolling bearing devices that support wheels of automobiles or the like incorporate sensors for detecting the rotational speed of the wheels for control of an antilock brake system or the like.
As shown in FIG. 5, such a rolling bearing device includes a hub shaft 102 having an axially outer flange portion 102a to which a wheel (not shown) is attached and an axially inner shaft portion 102b, and the shaft portion. An outer ring 101 that is coaxial with the outer side in the radial direction of 102b and is fixed to the vehicle body side, and a pair of first inner ring 103 and second inner ring 104 that are externally fitted adjacent to the outer side and the inner side in the axial direction in the shaft portion 102b; A plurality of tapered rollers 105 interposed between the outer ring 101 and the first inner ring 103 and between the outer ring 101 and the second inner ring 104 are provided.

そして、前記第１内輪１０３は、円錐ころ１０５の軌道を外周面に形成した本体部１０３ａと、この本体部１０３ａから第２内輪１０４側へ延びた円筒部１０３ｂとを有しており、この円筒部１０３ｂの外周に環状の被検出部材（パルサリング）１０６が外嵌している。また、外輪１０１に形成した取付孔１０８内にセンサ１０７が固定されており、センサ１０７の検出部１０７ａが被検出部材１０６の外周部１０６ａに対して僅かな隙間を有して対向している（例えば、特許文献１参照）。
このように構成した転がり軸受装置において、車輪を取り付けたハブ軸１０２が回転すると被検出部材１０６が共に回転し、外輪１０１に固定の前記センサ１０７を用いてこの被検出部材１０６の回転速度を求めることができる。これにより、アンチロックブレーキシステム等の制御のための車輪の回転速度を求めることができる。 The first inner ring 103 has a main body part 103a in which the raceway of the tapered roller 105 is formed on the outer peripheral surface, and a cylindrical part 103b extending from the main body part 103a to the second inner ring 104 side. An annular detected member (pulsar ring) 106 is fitted on the outer periphery of the portion 103b. In addition, a sensor 107 is fixed in a mounting hole 108 formed in the outer ring 101, and the detection portion 107a of the sensor 107 is opposed to the outer peripheral portion 106a of the detected member 106 with a slight gap ( For example, see Patent Document 1).
In the rolling bearing device configured as described above, when the hub shaft 102 to which the wheel is attached rotates, the detected member 106 rotates together, and the rotational speed of the detected member 106 is obtained using the sensor 107 fixed to the outer ring 101. be able to. Thereby, the rotational speed of the wheel for control of an anti-lock brake system etc. can be calculated | required.

特開２００３−１３００６３号公報（図１）Japanese Patent Laying-Open No. 2003-130063 (FIG. 1)

このような転がり軸受装置において、ハブ軸１０２の軸部１０２ｂと、第１内輪１０３及び第２内輪１０４との間は締り嵌めとしており、このために、軸部１０２ｂの外周面、第１内輪１０３の内周面及び第２内輪１０４の内周面において、高い寸法精度が要求される。さらに、第１内輪１０３の円筒部１０３ｂにおける被検出部材１０６の取り付け精度が低いと、被検出部材１０６の外周部１０６ａがふらつき、センサ１０７による検出精度が低下するおそれがある。
このため、被検出部材１０６の内周面と、円筒部１０３ｂの外周面との間についても高い寸法精度が要求される。このように、ハブ軸１０２の軸部１０２ｂと第１内輪１０３及び第２内輪１０４との間、並びに第１内輪１０３と被検出部材１０６との間に、精度の高い寸法管理が必要となるため、各部材の製造、及び転がり軸受装置の組み立てに工数を要し、コストアップになるという問題点がある。
そこで、本発明はこのような問題点に鑑みてなされたものであり、被検出部材の取付け精度を高くできるとともに、コストの低減が可能となるセンサ付き転がり軸受装置を提供することを目的とする。 In such a rolling bearing device, the shaft portion 102b of the hub shaft 102 and the first inner ring 103 and the second inner ring 104 are tightly fitted. For this reason, the outer peripheral surface of the shaft portion 102b and the first inner ring 103 are fitted. High dimensional accuracy is required on the inner peripheral surface of the second inner ring 104 and the inner peripheral surface of the second inner ring 104. Furthermore, if the mounting accuracy of the detection member 106 in the cylindrical portion 103b of the first inner ring 103 is low, the outer peripheral portion 106a of the detection member 106 may fluctuate and the detection accuracy of the sensor 107 may be reduced.
For this reason, high dimensional accuracy is also required between the inner peripheral surface of the detected member 106 and the outer peripheral surface of the cylindrical portion 103b. In this way, highly accurate dimensional control is required between the shaft portion 102b of the hub shaft 102 and the first inner ring 103 and the second inner ring 104, and between the first inner ring 103 and the detected member 106. In addition, there is a problem that man-hours are required for manufacturing each member and assembling the rolling bearing device, resulting in an increase in cost.
Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide a sensor-equipped rolling bearing device that can increase the mounting accuracy of a member to be detected and can reduce the cost. .

本発明のセンサ付き転がり軸受装置は、車輪を取り付ける軸方向外側のフランジ部とその軸方向内側の軸部とを有するハブ軸と、前記軸部の径方向外側に同軸状で車体側に固定される外輪と、前記軸部の軸方向外側と内側とにそれぞれ外嵌した一対の第１内輪と第２内輪と、前記外輪と前記第１及び第２内輪との間にそれぞれ転動自在に介在した複数の転動体と、前記ハブ軸と一体回転する環状の被検出部材と、前記外輪に取り付けられて前記被検出部材の回転を検出するためのセンサとを備え、前記被検出部材は、前記第１内輪と前記第２内輪との間において前記軸部に外嵌しているものである。
この構成によれば、第１内輪及び第２内輪を外嵌させるために高い寸法精度としたハブ軸の軸部の外周面に、被検出部材を外嵌させることで、当該被検出部材の取り付け精度を高めることができる。これにより、センサによる検出精度を高めることができる。被検出部材を取り付けるために、従来のように第１内輪の外周面の一部における寸法精度を高くする必要がない。このため、高い寸法精度の管理が必要となる部分を従来よりも減らすことができ、構造が簡単となり、コストの低減が可能となる。 A rolling bearing device with a sensor according to the present invention includes a hub shaft having a flange portion on the outer side in the axial direction to which a wheel is attached and a shaft portion on the inner side in the axial direction, and is coaxially fixed to the vehicle body side on the radially outer side of the shaft portion. An outer ring, a pair of first inner ring and second inner ring that are fitted on the outer side and the inner side in the axial direction of the shaft part, and an outer ring and a first inner ring and a second inner ring, respectively, which are freely rollable. A plurality of rolling elements, an annular detected member that rotates integrally with the hub shaft, and a sensor that is attached to the outer ring and detects the rotation of the detected member. The shaft is externally fitted between the first inner ring and the second inner ring.
According to this configuration, by attaching the detected member to the outer peripheral surface of the shaft portion of the hub shaft having high dimensional accuracy for externally fitting the first inner ring and the second inner ring, the detected member is attached. Accuracy can be increased. Thereby, the detection accuracy by a sensor can be raised. In order to attach the member to be detected, it is not necessary to increase the dimensional accuracy in a part of the outer peripheral surface of the first inner ring as in the prior art. For this reason, it is possible to reduce the number of parts that require high dimensional accuracy management as compared with the prior art, simplify the structure, and reduce the cost.

また、前記センサ付き転がり軸受装置において、前記第１内輪と前記第２内輪とは同一形状の部材であるのが好ましい。これによれば、部品の共通化によりコストの低減が可能となる。   In the rolling bearing device with a sensor, the first inner ring and the second inner ring are preferably members having the same shape. According to this, cost can be reduced by sharing parts.

なお、前記センサ付き転がり軸受装置において、前記被検出部材はその外周部にＮ極とＳ極とを周方向に交互に配列した着磁部を有するものとできる。これによれば、周方向に交互に配列するＮ極とＳ極とのピッチを小さくすれば、センサによる検出精度を高めることができる。   In the rolling bearing device with a sensor, the detected member may have a magnetized portion in which N poles and S poles are alternately arranged in the circumferential direction on the outer peripheral portion thereof. According to this, if the pitch between the N pole and the S pole alternately arranged in the circumferential direction is reduced, the detection accuracy by the sensor can be increased.

または、前記センサ付き転がり軸受装置において、前記被検出部材はその外周部に凹部と凸部とを周方向に交互に配列した凹凸部を有するものとできる。これによれば、製造が容易でありコストの低減が図れる。   Alternatively, in the rolling bearing device with a sensor, the detected member may have a concavo-convex portion in which concave portions and convex portions are alternately arranged in the circumferential direction on an outer peripheral portion thereof. According to this, manufacture is easy and cost reduction can be achieved.

本発明のセンサ付き転がり軸受装置によれば、ハブ軸に対する被検出部材の取り付け精度を高めることができ、センサによる検出精度を高めることができる。また、高い寸法精度の管理が必要となる部分を従来よりも減らすことができ、構造が簡単となり、コストの低減が可能となる。   According to the rolling bearing device with a sensor of the present invention, it is possible to increase the accuracy of attaching the detected member to the hub shaft, and it is possible to increase the accuracy of detection by the sensor. In addition, the portion requiring high dimensional accuracy management can be reduced as compared with the conventional case, the structure becomes simple, and the cost can be reduced.

本発明の好ましい実施形態について添付図面を参照しながら説明する。
図１は本発明の一実施形態であるセンサ付き転がり軸受装置を示す断面図である。このセンサ付き転がり軸受装置は、自動車などの車両の車輪を懸架装置に対して回転自在に支持することができるものである。 Preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing a sensor-equipped rolling bearing device according to an embodiment of the present invention. This rolling bearing device with a sensor is capable of rotatably supporting the wheels of a vehicle such as an automobile with respect to a suspension device.

図において、このセンサ付き転がり軸受装置は、車輪（図示せず）が取り付けられるハブ軸２と、このハブ軸２と同心状に配置され車体側に固定される外輪１と、ハブ軸２の外周面に外嵌固定した一対の第１内輪３及び第２内輪４と、外輪１と第１内輪３との間及び外輪１と第２内輪４との間にそれぞれ転動自在に介在した複数の転動体としての円錐ころ５ａ，５ｂと、ハブ軸２と一体回転する環状の被検出部材（パルサーリング）６と、この被検出部材６を検出対象として外輪１に取り付けられたセンサ７とを備えている。
さらに、このセンサ付き転がり軸受装置は、外輪１と両内輪３，４との間の環状の空間を外部との間で密封するシール部材１１ａ，１１ｂと、第２内輪４の軸方向内側でハブ軸２に外嵌した環状のカプラ９とを備えている。なお、車体に取り付けたこのセンサ付き転がり軸受装置において、車幅方向の外側（図１の左側）を軸方向外側とし、車幅方向の内側（図１の右側）を軸方向内側としている。 In the figure, this sensor-equipped rolling bearing device includes a hub shaft 2 to which wheels (not shown) are attached, an outer ring 1 that is arranged concentrically with the hub shaft 2 and fixed to the vehicle body side, and an outer periphery of the hub shaft 2. A plurality of first inner rings 3 and second inner rings 4 that are externally fitted and fixed to the surface, a plurality of rolls interposed between the outer ring 1 and the first inner ring 3 and between the outer ring 1 and the second inner ring 4, respectively, so as to be freely rollable. Tapered rollers 5a and 5b as rolling elements, an annular detected member (pulsar ring) 6 that rotates integrally with the hub shaft 2, and a sensor 7 attached to the outer ring 1 with the detected member 6 as a detection target. ing.
Further, this sensor-equipped rolling bearing device includes seal members 11a and 11b that seal an annular space between the outer ring 1 and the inner rings 3 and 4 between the outside and a hub on the inner side in the axial direction of the second inner ring 4. And an annular coupler 9 fitted on the shaft 2. In this sensor-equipped rolling bearing device attached to the vehicle body, the outside in the vehicle width direction (left side in FIG. 1) is the outside in the axial direction, and the inside in the vehicle width direction (right side in FIG. 1) is the inside in the axial direction.

ハブ軸１は、車輪（図示せず）を取り付ける軸方向外側のフランジ部２ａと、その軸方向内側の軸部２ｂとを有している。外輪１は、ハブ軸２の軸部２ｂの径方向外側に同軸状にあり、車体側に固定される固定輪である。外輪１の内周面には円錐ころ５ａ，５ｂがそれぞれ転動する軸方向外側の第１外輪軌道１２ａ及び軸方向内側の第２外輪軌道１２ｂが形成されており、外周面には車両の懸架装置（図示せず）に取り付けるための取付フランジ１ａが形成されている。
また、外輪１には、当該外輪１２の径方向内外を貫通した取付孔１３が形成されており、この取付孔１３にセンサ７が挿入固定されている。なお、取付孔１３及びセンサ７は、軸方向について第１外輪軌道１２ａと第２外輪軌道１２ｂとの間に設けられている。 The hub shaft 1 has an axially outer flange portion 2a to which a wheel (not shown) is attached, and an axially inner shaft portion 2b. The outer ring 1 is a fixed wheel that is coaxial with the outer side in the radial direction of the shaft portion 2 b of the hub shaft 2 and is fixed to the vehicle body side. A first outer ring raceway 12a on the outer side in the axial direction on which the tapered rollers 5a and 5b roll and a second outer ring raceway 12b on the inner side in the axial direction are formed on the inner peripheral surface of the outer ring 1, and the vehicle is suspended on the outer peripheral surface. An attachment flange 1a for attachment to a device (not shown) is formed.
The outer ring 1 is formed with a mounting hole 13 that penetrates the outer ring 12 in the radial direction, and the sensor 7 is inserted and fixed in the mounting hole 13. The mounting hole 13 and the sensor 7 are provided between the first outer ring raceway 12a and the second outer ring raceway 12b in the axial direction.

第１内輪３はハブ軸２の軸部２ｂの軸方向外側に外嵌し、第２内輪４はハブ軸２の軸部２ｂの軸方向内側に外嵌しており、第１内輪３及び第２内輪４は、軸部２ｂに締り嵌めの状態にあり、ハブ軸２と一体回転する。第１内輪３の外周面に、前記第１外輪軌道１２ａに対向する第１内輪軌道１５ａが形成されており、第２内輪４の外周面に、前記第２外輪軌道１２ｂに対向する第２内輪軌道１５ｂが形成されている。また、図１の形態では、第１内輪３と第２内輪４とは同一形状の部材である。   The first inner ring 3 is fitted on the outer side in the axial direction of the shaft part 2 b of the hub shaft 2, and the second inner ring 4 is fitted on the inner side in the axial direction of the shaft part 2 b of the hub shaft 2. 2 The inner ring 4 is in an interference fit with the shaft portion 2 b and rotates integrally with the hub shaft 2. A first inner ring raceway 15a facing the first outer ring raceway 12a is formed on the outer peripheral face of the first inner ring 3, and a second inner ring facing the second outer ring raceway 12b is formed on the outer peripheral face of the second inner ring 4. A track 15b is formed. In the form of FIG. 1, the first inner ring 3 and the second inner ring 4 are members having the same shape.

そして、これら第１内輪３と第２内輪４との軸方向の間に、前記被検出部材６が介在しており、被検出部材６は軸部２ｂに直接外嵌している。さらに説明すると、ハブ軸２の軸部２ｂは、軸線Ｃに平行な方向に直線である外周面１４を有している。そして、この軸部２ｂと、第１内輪３及び第２内輪４との間は締り嵌めとするために、軸部２ｂの外周面１４、第１内輪３の内周面及び第２内輪４の内周面について、高い寸法精度が必要とされており、これら面は研磨などの仕上加工が施されている。
また、被検出部材６の内周面６ｄについても同様の仕上加工が施されており、被検出部材６と軸部２ｂとの間は締り嵌めの状態としている。そして、第１内輪３、被検出部材６、及び第２内輪４は、この順番で軸方向外側から内側へ並んで、共通する前記外周面１４に外嵌している。 The detected member 6 is interposed between the first inner ring 3 and the second inner ring 4 in the axial direction, and the detected member 6 is directly fitted on the shaft portion 2b. More specifically, the shaft portion 2b of the hub shaft 2 has an outer peripheral surface 14 that is straight in a direction parallel to the axis C. In order to provide an interference fit between the shaft 2b and the first inner ring 3 and the second inner ring 4, the outer peripheral surface 14 of the shaft 2b, the inner peripheral surface of the first inner ring 3, and the second inner ring 4 High dimensional accuracy is required for the inner peripheral surface, and these surfaces are subjected to finishing processing such as polishing.
Further, the same finishing process is applied to the inner peripheral surface 6d of the detected member 6, and an interference fit is established between the detected member 6 and the shaft portion 2b. The first inner ring 3, the detected member 6, and the second inner ring 4 are arranged in this order from the outer side in the axial direction to the inner side and are externally fitted to the common outer peripheral surface 14.

被検出部材６において、その内周面６ｄは軸線Ｃに平行な方向に直線な面であり、軸方向外内の側面６ｂ，６ｃは、軸線Ｃに直交する方向に直線な面である。また、被検出部材６の外周部は、軸線Ｃに対して傾斜した方向に直線な面を有しており、この外周部がセンサ７による検出対象部となる。そして、図２は被検出部材６の要部を示す説明図であり、被検出部材６はその外周部に凹部２８ａと凸部２８ｂとを周方向に交互に配列した凹凸部２８を有している。   In the detected member 6, the inner peripheral surface 6 d is a straight surface in a direction parallel to the axis C, and the inner and outer side surfaces 6 b and 6 c are straight surfaces in a direction orthogonal to the axis C. Further, the outer peripheral portion of the detected member 6 has a straight surface in a direction inclined with respect to the axis C, and this outer peripheral portion becomes a detection target portion by the sensor 7. FIG. 2 is an explanatory view showing the main part of the member 6 to be detected. The member 6 to be detected has an uneven portion 28 in which concave portions 28a and convex portions 28b are alternately arranged in the circumferential direction on the outer peripheral portion thereof. Yes.

センサ７は、その先端に被検出部材６の外周部に対向配置された検出部７ａを有している。外輪１に形成した取付孔１３にセンサ７を挿入することで、検出部７ａを外輪１の内周側に露出させるとともに、被検出部材６の外周部（外周面６ａ）に対して隙間（ギャップ）を有して対向させた状態としている。
図１のセンサ７は、後にも説明するが変位センサとすることができ、ハブ軸２と共に被検出部材６が回転すると、被検出部材６の凹凸部２８に対する隙間の変化をセンサ７が検出でき、当該被検出部材６の回転を検出することができる。 The sensor 7 has a detection portion 7 a disposed at the tip thereof so as to face the outer peripheral portion of the detection target member 6. By inserting the sensor 7 into the mounting hole 13 formed in the outer ring 1, the detection part 7 a is exposed to the inner peripheral side of the outer ring 1 and a gap (gap) is formed with respect to the outer peripheral part (outer peripheral surface 6 a) of the detected member 6. ) To face each other.
The sensor 7 shown in FIG. 1 can be a displacement sensor, which will be described later. When the detected member 6 rotates together with the hub shaft 2, the sensor 7 can detect a change in the gap with respect to the uneven portion 28 of the detected member 6. The rotation of the detected member 6 can be detected.

ハブ軸２の軸部２ｂに対する第１内輪３、第２内輪４、及び被検出部材６の組み立て方法は、軸部２ｂを、第１内輪３、被検出部材６、及び第２内輪４に圧入して行う。さらに、カプラ９を軸部２ｂの軸方向内側の部分に外嵌させ、軸部２ｂの軸方向内側端部を径方向外側へかしめ加工し、かしめ部２２を形成する。
これにより、第１内輪３の大径鍔部１６の側端面が軸部２ｂの拡径した軸心直交面２１に当接し、第１内輪３の小径鍔部１７の側端面が被検出部材６の軸方向外側の側面６ｂに当接し、被検出部材６の軸方向内側の側面６ｃが第２内輪４の小径鍔部１９の側端面に当接し、第２内輪４の大径鍔部１８の側端面がカプラ９の軸方向外側の端面に当接し、かしめ部２２がカプラ９の軸方向内側の端面に当接した状態となり、前記軸心直交面２１とかしめ部２２との間で、第１内輪３、被検出部材６、第２内輪４、及びカプラ９が挟まれて、これらは軸方向への移動が規制されている。また、この組み立て方法により組み立てることで、被検出部材６は第１内輪３と第２内輪４との間に挟まれてその軸方向について位置決めがされる。 The method of assembling the first inner ring 3, the second inner ring 4, and the detected member 6 with respect to the shaft portion 2b of the hub shaft 2 is to press-fit the shaft portion 2b into the first inner ring 3, the detected member 6, and the second inner ring 4. And do it. Further, the coupler 9 is fitted onto the axially inner portion of the shaft portion 2b, and the axially inner end portion of the shaft portion 2b is caulked to the outer side in the radial direction to form the caulking portion 22.
As a result, the side end surface of the large-diameter flange portion 16 of the first inner ring 3 abuts on the axis-centered orthogonal surface 21 of the shaft portion 2b, and the side end surface of the small-diameter flange portion 17 of the first inner ring 3 is the detected member 6. The side surface 6c of the detected member 6 in the axial direction is in contact with the side end surface of the small diameter flange portion 19 of the second inner ring 4, and the large diameter flange portion 18 of the second inner ring 4 is in contact with the side surface 6b. The side end surface comes into contact with the end surface on the outer side in the axial direction of the coupler 9 and the caulking portion 22 comes into contact with the end surface on the inner side in the axial direction of the coupler 9. The first inner ring 3, the detected member 6, the second inner ring 4, and the coupler 9 are sandwiched, and these are restricted from moving in the axial direction. Further, by assembling by this assembling method, the detected member 6 is sandwiched between the first inner ring 3 and the second inner ring 4 and positioned in the axial direction.

このように、第１内輪３及び第２内輪４を外嵌させるために外周面１４の寸法精度を高くした軸部２ｂを用いて、被検出部材６を取り付けることができる。そして、被検出部材６の内周面６ｄについても寸法精度を高くしていることで、軸部２ｂに対する被検出部材６の取り付け精度は高くなる。
これにより、被検出部材６のふらつきを抑え、センサ７による検出精度を高めることができる。また、図５で示した従来例のように、被検出部材１０６を取り付けるために、第１内輪１０３の円筒部１０３ｂの外周面における寸法精度を高くする構成が、この発明では不要であるため、高い寸法精度の管理が必要となる部分を従来よりも減らすことができ、構造が簡単となり、コストの低減が可能となる。
また、第１内輪３と第２内輪４とを同一形状の部材としていることで、部品の共通化が図れ、さらにコストの低減が可能となる。 In this way, the member 6 to be detected can be attached using the shaft portion 2b in which the dimensional accuracy of the outer peripheral surface 14 is increased in order to externally fit the first inner ring 3 and the second inner ring 4. And since the dimensional accuracy is also made high also about the internal peripheral surface 6d of the to-be-detected member 6, the attachment accuracy of the to-be-detected member 6 with respect to the axial part 2b becomes high.
Thereby, the fluctuation of the detected member 6 can be suppressed and the detection accuracy by the sensor 7 can be increased. Further, as in the conventional example shown in FIG. 5, in order to attach the detected member 106, a configuration in which the dimensional accuracy on the outer peripheral surface of the cylindrical portion 103b of the first inner ring 103 is increased is unnecessary in the present invention. The number of parts that require high dimensional accuracy management can be reduced as compared with the prior art, the structure is simplified, and the cost can be reduced.
Further, since the first inner ring 3 and the second inner ring 4 are members having the same shape, the parts can be shared, and the cost can be further reduced.

センサ７は被検出部材６の外周部に隙間を有して対向した非接触式センサであり、センサ７を変位センサとすることができる。図１では、センサ７を被検出部材６の外周面との隙間（ギャップ）の変化を検出する変位センサとしている。
この場合、図２に示しているように、被検出部材６の外周部に凹部２８ａと凸部２８ｂとを周方向に交互に配列して形成している。変位センサは例えば渦電流式とすることができ、被検出部材６の凹凸部２８との間に磁界を発生させるとともに、回転に応じた磁界の磁束密度の変化を検出部７ａによって検出する。この検出結果（検出信号）によりハブ軸２の回転速度や回転数を求めることができる。具体的には、センサ７からの信号は、ハーネス（図示せず）を介して、車両のＥＣＵ等の制御部（図示せず）に出力され、当該制御部においてハブ軸１の回転速度や回転数、すなわち車輪の回転速度や回転数を求めることができる。 The sensor 7 is a non-contact sensor facing the outer periphery of the detected member 6 with a gap, and the sensor 7 can be a displacement sensor. In FIG. 1, the sensor 7 is a displacement sensor that detects a change in a gap (gap) with the outer peripheral surface of the detected member 6.
In this case, as shown in FIG. 2, the concave portions 28a and the convex portions 28b are alternately arranged in the circumferential direction on the outer peripheral portion of the member 6 to be detected. The displacement sensor can be of an eddy current type, for example, and generates a magnetic field between the uneven portion 28 of the member 6 to be detected and detects a change in magnetic flux density of the magnetic field according to the rotation by the detection unit 7a. From the detection result (detection signal), the rotation speed and the rotation speed of the hub shaft 2 can be obtained. Specifically, a signal from the sensor 7 is output to a control unit (not shown) such as an ECU of the vehicle via a harness (not shown), and the rotation speed and rotation of the hub shaft 1 are rotated by the control unit. The number, that is, the rotation speed and the number of rotations of the wheel can be obtained.

図３は、センサ付き転がり軸受装置の他の実施形態を示す断面図である。この実施の形態と図１の実施の形態とは、被検出部材６の外周部及びセンサ７について相異しているが、その他の構成については同じである。
すなわち、センサ７を磁気センサとしている。そして、図４に示しているように、被検出部材６は、その外周部にＮ極とＳ極とを周方向に交互に配列した着磁部８を有している。着磁部８は、被検出部材６の平滑な外周面６ａに形成できる。また、着磁部８は、被検出部材６の外周面６ａを直接着磁して構成したもの、又は被検出部材６の構成を、ハブ軸２に外嵌させた本体部と着磁させた環状部材とを有したものとし、本体部に環状部材を外嵌して構成したものとできる（図示せず）。 FIG. 3 is a cross-sectional view showing another embodiment of the rolling bearing device with sensor. This embodiment is different from the embodiment of FIG. 1 with respect to the outer peripheral portion of the detected member 6 and the sensor 7, but the other configurations are the same.
That is, the sensor 7 is a magnetic sensor. As shown in FIG. 4, the member 6 to be detected has a magnetized part 8 in which N poles and S poles are alternately arranged in the circumferential direction on the outer peripheral part thereof. The magnetized portion 8 can be formed on the smooth outer peripheral surface 6 a of the detected member 6. The magnetized portion 8 is configured by directly magnetizing the outer peripheral surface 6 a of the detected member 6 or the configuration of the detected member 6 is magnetized with the main body portion fitted on the hub shaft 2. An annular member may be included, and the annular member may be externally fitted to the main body (not shown).

磁気センサとしたセンサ７を例えば磁気抵抗素子を有するものなどとでき、ハブ軸２が回転することで被検出部材６が周方向に回転し、このセンサ７は対向する被検出部材６の着磁部８により磁性変化を検出でき、その検出結果（検出信号）によりハブ軸２の回転速度や回転数を求めることができる。具体的には、センサ７からの信号は、ハーネス（図示せず）を介して、車両のＥＣＵ等の制御部（図示せず）に出力され、当該制御部においてハブ軸１の回転速度や回転数、すなわち車輪の回転速度や回転数を求めることができる。
このように、被検出部材６の外周部に着磁部８を有する構成とした場合、被検出部材６の外周に周方向に連続した凹凸を形成する必要がなく、被検出部材６の構成が簡素化される。また、凹凸の加工が不要であることから被検出部材６を小さくでき、さらに、周方向に交互に配列するＮ極とＳ極とのピッチを小さくでき、センサ７による検出精度を高めることができる。 The sensor 7 as a magnetic sensor can be, for example, one having a magnetoresistive element, and the detected member 6 rotates in the circumferential direction when the hub shaft 2 rotates. This sensor 7 is magnetized by the opposing detected member 6. The magnetic change can be detected by the unit 8, and the rotation speed and the rotation speed of the hub shaft 2 can be obtained from the detection result (detection signal). Specifically, a signal from the sensor 7 is output to a control unit (not shown) such as an ECU of the vehicle via a harness (not shown), and the rotation speed and rotation of the hub shaft 1 are rotated by the control unit. The number, that is, the rotation speed and the number of rotations of the wheel can be obtained.
Thus, when it is set as the structure which has the magnetized part 8 in the outer peripheral part of the to-be-detected member 6, it is not necessary to form the unevenness | corrugation continuous in the circumferential direction on the outer periphery of the to-be-detected member 6, and the structure of the to-be-detected member 6 is. Simplified. In addition, since it is not necessary to process the unevenness, the detected member 6 can be made smaller, and the pitch between the N pole and the S pole arranged alternately in the circumferential direction can be made smaller, and the detection accuracy by the sensor 7 can be improved. .

また、図１及び図３の各実施の形態において、被検出部材６の外周面６ａを軸線Ｃに対して傾斜した面とし、さらに、センサ７を軸線直交方向に対して傾けて外輪１に固定して、センサ７の検出部７ａのある先端面を軸線Ｃに対して傾斜した面としている。これによれば、被検出部材６の外周面６ａを軸線Ｃに平行な方向にまっすぐな面とした場合（図示せず）よりも、被検出部材６の外周面６ａの面積を広くでき、センサ７による検出精度を高めることができる。   1 and 3, the outer peripheral surface 6a of the member 6 to be detected is inclined with respect to the axis C, and the sensor 7 is inclined with respect to the direction orthogonal to the axis and fixed to the outer ring 1. Thus, the tip surface of the sensor 7 where the detection portion 7a is located is a surface inclined with respect to the axis C. According to this, the area of the outer peripheral surface 6a of the detected member 6 can be made larger than when the outer peripheral surface 6a of the detected member 6 is a straight surface (not shown) in a direction parallel to the axis C, and the sensor The detection accuracy by 7 can be increased.

そして、各実施の形態によるセンサ付き転がり軸受装置は、ハブ軸２が回転すると、それに伴って被検出部材６が周方向に回転する。この被検出部材６が回転すると、センサ７の検出部７ａと被検出部材６の外周面６ａとの間において、磁性の変化や、エアギャップの変化が生じ、センサ７は、このハブ軸２の回転に応じた前記変化を検出でき、これを車両の前記制御部に出力できる。そして、制御部（図示せず）においてハブ軸２の回転速度や回転数、すなわち車輪の回転速度や回転数を求めることができ、車両のアンチロックブレーキシステム等の制御に反映される。   In the rolling bearing device with sensor according to each embodiment, when the hub shaft 2 rotates, the detected member 6 rotates in the circumferential direction. When the detected member 6 rotates, a change in magnetism or a change in air gap occurs between the detection portion 7a of the sensor 7 and the outer peripheral surface 6a of the detected member 6, and the sensor 7 is connected to the hub shaft 2. The change according to the rotation can be detected, and this can be output to the control unit of the vehicle. A control unit (not shown) can determine the rotation speed and rotation speed of the hub shaft 2, that is, the rotation speed and rotation speed of the wheel, and is reflected in the control of the antilock brake system of the vehicle.

なお、本発明のセンサ付転がり軸受装置は、前記実施形態に限定されるものではない。
例えば、上記実施形態では、第２内輪４とかしめ部２２との間にカプラ９を介在させた場合を説明したが、図示しないが、このカプラ９を省略し、かしめ部２２を第２内輪４の軸方向内側の端面に当接させてもよい。
また、図示しないが、かしめ部２２の代わりに、ハブ軸２の軸部２ｂの軸方向内側端部にナット部材を螺合させ、このナット部材により第１内輪３、被検出部材６、及び第２内輪４を固定してもよい。
また、被検出部材６の外周面６ａを軸線Ｃに対して傾斜した面とし、この面に平行に対向させるセンサ７の検出部７ａのある先端面を軸線Ｃに対して傾斜した面とした場合を説明したが、図示しないが、被検出部材６の外周面を軸線Ｃに平行な方向に直線である面とし、センサ７の先端面もこれに平行な面としてもよい。 The sensor-equipped rolling bearing device of the present invention is not limited to the above embodiment.
For example, in the above embodiment, the case where the coupler 9 is interposed between the second inner ring 4 and the caulking portion 22 has been described. However, although not illustrated, the coupler 9 is omitted and the caulking portion 22 is replaced with the second inner ring 4. You may make it contact | abut to the end surface of the axial direction inner side.
Although not shown, a nut member is screwed into the axially inner end portion of the shaft portion 2b of the hub shaft 2 instead of the caulking portion 22, and the first inner ring 3, the detected member 6, and the The two inner rings 4 may be fixed.
Further, when the outer peripheral surface 6a of the detected member 6 is a surface inclined with respect to the axis C, and the tip surface with the detection portion 7a of the sensor 7 opposed in parallel to this surface is a surface inclined with respect to the axis C Although not shown, the outer peripheral surface of the detected member 6 may be a surface that is straight in a direction parallel to the axis C, and the tip surface of the sensor 7 may be a surface parallel to the surface.

本発明のセンサ付き転がり軸受装置の実施の一形態を示す断面図である。It is sectional drawing which shows one Embodiment of the rolling bearing apparatus with a sensor of this invention. 被検出部材の要部を示す説明図である。It is explanatory drawing which shows the principal part of a to-be-detected member. 本発明のセンサ付き転がり軸受装置の他の実施形態を示す断面図である。It is sectional drawing which shows other embodiment of the rolling bearing apparatus with a sensor of this invention. 被検出部材の要部を示す説明図である。It is explanatory drawing which shows the principal part of a to-be-detected member. 従来のセンサ付き転がり軸受装置を示す断面図である。It is sectional drawing which shows the conventional rolling bearing apparatus with a sensor.

符号の説明Explanation of symbols

１ 外輪
２ ハブ軸
２ａ フランジ部
２ｂ 軸部
３ 第１内輪
４ 第２内輪
５ａ 円錐ころ（転動体）
５ｂ 円錐ころ（転動体）
６ 被検出部材
７ センサ
８ 着磁部
２８ 凹凸部
２８ａ 凹部
２８ｂ 凸部 1 outer ring 2 hub shaft 2a flange portion 2b shaft portion 3 first inner ring 4 second inner ring 5a tapered roller (rolling element)
5b Tapered roller (rolling element)
6 Detected member 7 Sensor 8 Magnetized part 28 Concave and convex part 28 a Concave part 28 b Convex part

Claims (2)

車輪を取り付ける軸方向外側のフランジ部とその軸方向内側の軸部とを有するハブ軸と、前記軸部の径方向外側に同軸状で車体側に固定される外輪と、前記軸部の軸方向外側と内側とにそれぞれ外嵌した一対の第１内輪と第２内輪と、前記外輪と前記第１及び第２内輪との間にそれぞれ転動自在に介在した複数の転動体と、前記ハブ軸と一体回転する環状の被検出部材と、前記外輪に取り付けられて前記被検出部材の回転を検出するためのセンサと、を備え、
前記被検出部材は、前記第１内輪と前記第２内輪との間において前記軸部に外嵌していることを特徴とするセンサ付き転がり軸受装置。 A hub shaft having an axially outer flange portion for attaching a wheel and an axially inner shaft portion, an outer ring coaxially fixed to the vehicle body side radially outside the shaft portion, and an axial direction of the shaft portion A pair of first inner ring and second inner ring which are respectively fitted on the outer side and the inner side; a plurality of rolling elements which are respectively rotatable between the outer ring and the first and second inner rings; and the hub axle An annular detected member that rotates integrally with the sensor, and a sensor that is attached to the outer ring and detects the rotation of the detected member.
A sensor-equipped rolling bearing device, wherein the detected member is externally fitted to the shaft portion between the first inner ring and the second inner ring. 前記第１内輪と前記第２内輪とは同一形状の部材である請求項１に記載のセンサ付き転がり軸受装置。   The rolling bearing device with a sensor according to claim 1, wherein the first inner ring and the second inner ring are members having the same shape.
JP2006181957A 2006-06-30 2006-06-30 Rolling bearing unit with sensor Pending JP2008008463A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009281173A (en) * 2008-05-20 2009-12-03 Alps Electric Co Ltd Electric parts
JP2013126871A (en) * 2013-02-07 2013-06-27 Jtekt Corp Storage method for vehicular hub unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009281173A (en) * 2008-05-20 2009-12-03 Alps Electric Co Ltd Electric parts
JP2013126871A (en) * 2013-02-07 2013-06-27 Jtekt Corp Storage method for vehicular hub unit

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