JP2009156269A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
JP2009156269A
JP2009156269A JP2007331438A JP2007331438A JP2009156269A JP 2009156269 A JP2009156269 A JP 2009156269A JP 2007331438 A JP2007331438 A JP 2007331438A JP 2007331438 A JP2007331438 A JP 2007331438A JP 2009156269 A JP2009156269 A JP 2009156269A
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Japan
Prior art keywords
sensor
sensor element
ring
wiring
bearing device
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Pending
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JP2007331438A
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Japanese (ja)
Inventor
Kazuhisa Shigeoka
和寿 重岡
Takayasu Takubo
孝康 田窪
Hiroshi Kawamura
浩志 河村
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2007331438A priority Critical patent/JP2009156269A/en
Publication of JP2009156269A publication Critical patent/JP2009156269A/en
Pending legal-status Critical Current

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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
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
    • 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
    • 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
    • F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer means

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel capable of detecting various pieces of bearing information without increasing the size of a bearing. <P>SOLUTION: The bearing device 1 for wheel comprises two inner rings 3A which have a rolling surface 5 of a single row on each outer circumference, and are juxtaposed in the axial direction, and butted to each other on their end faces, an outer ring 2 having rolling surfaces 4 of double rows opposite to each rolling surface 5 of these two inner rings 3A, 3A, and rolling elements of double rows interposed between the rolling surfaces 5, 4 of the inner and outer rings. A sensor 10 for detecting at least one characteristic out of the axial force applied between these two inner rings 3A, 3A, the bearing temperature, and the relative rotational speed between the inner and outer rings is interposed between the end faces with the two inner rings 3A, 3A being butted to each other. The sensor 10 comprises a sensor element fitting ring 11 and a sensor element 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、軸受異常、固定状態、回転速度などの各種軸受情報を検出する機能を備えた車輪用軸受装置に関する。   The present invention relates to a wheel bearing device having a function of detecting various bearing information such as a bearing abnormality, a fixed state, and a rotational speed.

この種の車輪用軸受装置として、図１０に示すように、転がり軸受３１の内外輪３２，３３間の軸受空間の両端をシールするシール手段３４に、軸受内の温度を測定する温度センサ３７を取付けたものが提案されている（例えば特許文献１）。この場合の転がり軸受３１は、外輪回転型である複列の円すいころ軸受であり、固定輪である内輪３２は軸方向に並ぶ一対の分割内輪３２Ａ，３２Ａを互いに端面で付き合わせた分割型とされ、図示しない軸の外周に嵌合して固定される。シール手段３４は、内輪３２に取付けたシール部材３５と、外輪３３に取付けたシール部材３６とで構成され、固定輪である内輪３２側のシール部材３５に温度センサ３７が設けられている。転がり軸受３１の両端の温度センサ３７の配線３８を、いずれか片方へまとめて引き出せるように、片方の温度センサ３７の配線３８は、内輪３２の内径面に設けた軸方向溝３９を通して引き出される。
特開２００２−１３０２６３号公報 As this type of wheel bearing device, as shown in FIG. 10, a temperature sensor 37 for measuring the temperature in the bearing is provided on a seal means 34 for sealing both ends of the bearing space between the inner and outer rings 32, 33 of the rolling bearing 31. An attached one has been proposed (for example, Patent Document 1). The rolling bearing 31 in this case is a double-row tapered roller bearing that is a rotating outer ring type, and the inner ring 32 that is a fixed ring is a split type in which a pair of split inner rings 32A and 32A aligned in the axial direction are attached to each other at their end faces. Then, it is fitted and fixed to the outer periphery of a shaft (not shown). The seal means 34 includes a seal member 35 attached to the inner ring 32 and a seal member 36 attached to the outer ring 33, and a temperature sensor 37 is provided on the seal member 35 on the inner ring 32 side which is a fixed ring. The wiring 38 of one temperature sensor 37 is drawn out through an axial groove 39 provided on the inner diameter surface of the inner ring 32 so that the wiring 38 of the temperature sensor 37 at both ends of the rolling bearing 31 can be drawn out to either one.
JP 2002-130263 A

しかし、軸受情報として検出することが望まれるものは軸受温度に限らず、軸受固定状態など他の軸受異常情報や回転速度などの情報があり、上記構成の車輪用軸受装置ではこれらの情報は検出できない。また、上記構成の車輪用軸受装置では、温度センサ３７をシール部材３５に取付けているが、温度センサ以外のセンサを取付ける場合、軸受を大型化することなく取付けることができる構造が求められる。   However, what is desired to be detected as bearing information is not limited to the bearing temperature, but there is other bearing abnormality information such as the bearing fixed state and information such as rotational speed. Can not. In the wheel bearing device having the above-described configuration, the temperature sensor 37 is attached to the seal member 35. However, when a sensor other than the temperature sensor is attached, a structure that can be attached without increasing the size of the bearing is required.

この発明の目的は、軸受を大型化することなく各種軸受情報を検出できる車輪用軸受装置を提供することである。   An object of the present invention is to provide a wheel bearing device capable of detecting various types of bearing information without increasing the size of the bearing.

この発明の車輪用軸受装置は、それぞれ外周に単列の転走面を有し軸方向に並んで配置されて互いに端面で突き合わせられた２個の内輪と、これら２個の内輪の各転走面に対向する複列の転走面を内周に有する外輪と、これら内外輪の転走面間に介在した複列の転動体とを備えた車輪用軸受装置であって、前記２個の内輪の互いに突き合わせられる端面間に、これら２個の内輪間に作用する軸力、軸受温度、内外輪間の相対的な回転速度のうちの少なくとも一つの特性を検出するセンサを介在させたことを特徴とする。
この構成によると、２個の内輪の互いに突き合わせられる端面間に、これら２個の内輪間に作用する軸力、軸受温度、内外輪間の相対的な回転速度のうちの少なくとも一つの特性を検出するセンサを介在させたため、軸受を大型化することなく、前記軸力、軸受温度、回転速度などの各種軸受情報を検出することができる。 The wheel bearing device according to the present invention includes two inner rings each having a single row of rolling surfaces on the outer periphery and arranged side by side in the axial direction and abutted with each other at the end surfaces, and the rolling of each of the two inner rings. A wheel bearing device comprising an outer ring having a double-row rolling surface facing the surface on the inner periphery, and a double-row rolling element interposed between the rolling surfaces of the inner and outer rings, A sensor for detecting at least one of the characteristics of the axial force acting between the two inner rings, the bearing temperature, and the relative rotational speed between the inner and outer rings is interposed between the end faces of the inner rings that are brought into contact with each other. Features.
According to this configuration, at least one characteristic of an axial force acting between the two inner rings, a bearing temperature, and a relative rotational speed between the inner and outer rings is detected between the end faces of the two inner rings that are brought into contact with each other. Since the sensor which interposes is interposed, various bearing information, such as the said axial force, bearing temperature, and rotational speed, can be detected, without enlarging a bearing.

この発明において、前記センサが、前記２個の内輪の互いに突き合わせられる端面間に介在するリング状のセンサ素子取付リングと、このセンサ素子取付リングに取付けられたセンサ素子とでなるものであっても良い。この構成の場合、軸受へのセンサの組付を容易に行うことができる。   In the present invention, the sensor may be composed of a ring-shaped sensor element mounting ring interposed between end faces of the two inner rings that are brought into contact with each other, and a sensor element mounted on the sensor element mounting ring. good. In this configuration, the sensor can be easily assembled to the bearing.

この発明において、前記内輪の内径面に、前記センサの配線を引き出す配線溝を設けても良い。この構成の場合、センサの配線が内輪と軸との間に強く押し付け状態に挟まるのを防止できる。   In the present invention, a wiring groove for drawing the wiring of the sensor may be provided on the inner diameter surface of the inner ring. In this configuration, it is possible to prevent the sensor wiring from being strongly pressed between the inner ring and the shaft.

この発明において、前記内輪が軸の外周に嵌合し、この軸の外径面における前記内輪と嵌合する部分に、前記センサの配線を引き出す配線溝を設けても良い。この構成の場合も、センサの配線が内輪と軸との間に強く押し付け状態に挟まるのを防止できる。   In the present invention, the inner ring may be fitted to the outer periphery of the shaft, and a wiring groove for drawing the sensor wiring may be provided in a portion of the outer diameter surface of the shaft fitted with the inner ring. Also in this configuration, it is possible to prevent the sensor wiring from being strongly pressed between the inner ring and the shaft.

上記のように配線を内輪等の配線溝内に配置する場合に、前記配線を前記内輪に配線固定手段で固定しても良い。このように配線を配線固定手段で内輪に固定すると、配線が緩むのを防止できる。   When the wiring is arranged in a wiring groove such as an inner ring as described above, the wiring may be fixed to the inner ring by wiring fixing means. If the wiring is thus fixed to the inner ring by the wiring fixing means, it is possible to prevent the wiring from being loosened.

上記のように配線固定手段を用いる場合に、この前記配線固定手段として接着剤を用いて配線を固定しても良い。   When the wiring fixing means is used as described above, the wiring may be fixed using an adhesive as the wiring fixing means.

この発明において、前記センサが、前記２個の内輪の互いに突き合わせられる端面間に介在するリング状のセンサ素子取付リングと、このセンサ素子取付リングに取付けられたセンサ素子とでなり、前記内輪の内径面に前記センサの配線を引き出す配線溝を設け、前記センサ素子取付リングの前記内輪に対する相対回転を阻止する回り止め手段を設けても良い。この構成の場合、センサの配線が上記相対回転で引っ張られて断線するなどの不具合の発生を防止できる。   In the present invention, the sensor includes a ring-shaped sensor element mounting ring interposed between end faces of the two inner rings that are brought into contact with each other, and a sensor element that is mounted on the sensor element mounting ring. A wiring groove for drawing the sensor wiring may be provided on the surface, and a rotation preventing means for preventing relative rotation of the sensor element mounting ring with respect to the inner ring may be provided. In the case of this configuration, it is possible to prevent the occurrence of problems such as disconnection of the sensor wiring pulled by the relative rotation.

この発明において、前記回り止め手段が、前記配線溝とは別に内輪に設けた係止溝と、前記センサ素子取付リングに設けられて前記係止溝に係合する係止突部とでなるものとしても良い。この構成の場合、軸受を大型化することなく、センサ素子取付リングの内輪に対する相対回転、すなわちクリープを阻止することができる。   In this invention, the detent means comprises a locking groove provided in the inner ring separately from the wiring groove, and a locking protrusion provided in the sensor element mounting ring and engaging with the locking groove. It is also good. In the case of this configuration, relative rotation, that is, creep, of the sensor element mounting ring with respect to the inner ring can be prevented without increasing the size of the bearing.

この発明において、前記軸力を検出するセンサ素子は歪みゲージ、前記軸受温度を検出するセンサ素子は熱電対ゲージ、前記内外輪間の相対的な回転速度を検出するセンサ素子は磁気センサであっても良い。   In this invention, the sensor element for detecting the axial force is a strain gauge, the sensor element for detecting the bearing temperature is a thermocouple gauge, and the sensor element for detecting the relative rotational speed between the inner and outer rings is a magnetic sensor. Also good.

この発明の車輪用軸受装置は、それぞれ外周に単列の転走面を有し軸方向に並んで配置されて互いに端面で突き合わせられた２個の内輪と、これら２個の内輪の各転走面に対向する複列の転走面を内周に有する外輪と、これら内外輪の転走面間に介在した複列の転動体とを備えた車輪用軸受装置であって、前記２個の内輪の互いに突き合わせられる端面間に、これら２個の内輪間に作用する軸力、軸受温度、内外輪間の相対的な回転速度のうちの少なくとも一つの特性を検出するセンサを介在させたため、軸受を大型化することなく、軸受に関する各種の状態の情報を検出することができる。   The wheel bearing device according to the present invention includes two inner rings each having a single row of rolling surfaces on the outer periphery and arranged side by side in the axial direction and abutted with each other at the end surfaces, and the rolling of each of the two inner rings. A wheel bearing device comprising an outer ring having a double-row rolling surface facing the surface on the inner periphery, and a double-row rolling element interposed between the rolling surfaces of the inner and outer rings, Since a sensor for detecting at least one of the characteristics of the axial force acting between the two inner rings, the bearing temperature, and the relative rotational speed between the inner and outer rings is interposed between the end faces of the inner rings that are brought into contact with each other. It is possible to detect information on various states related to the bearing without increasing the size of the bearing.

この発明の一実施形態を図１ないし図５に基づいて説明する。この車輪用軸受装置１は、第２世代型に分類される複列の円すいころ軸受型であり、外輪回転タイプでかつ従動輪支持用のものである。この車輪用軸受装置１は、内周に複列の転走面４を有するハブ輪兼用の外輪２と、これら転走面４にそれぞれ対向する転走面５を有する内輪組３と、これら複列の転走面４，５間に介在する複列の転動体６とを備える。外輪２は一体型のものであり、外周にホイール取付用のハブフランジ２ａを有する。内輪組３は、単列の転走面５をそれぞれ有する２個の内輪３Ａ，３Ａが軸方向に並んで配置されて、互いに端面で突き合わせられた分割型とされ、各内輪３Ａは両鍔付きとされている。内輪組３は、図示しない軸の外周に嵌合して固定される。転動体６は各列毎に保持器７で保持されている。内外輪３，２間に形成される環状空間の両端は一対のシール手段８，９により密封されている。   An embodiment of the present invention will be described with reference to FIGS. This wheel bearing device 1 is a double row tapered roller bearing type classified as a second generation type, and is an outer ring rotating type and for supporting a driven wheel. The wheel bearing device 1 includes an outer ring 2 that also serves as a hub wheel having double-row rolling surfaces 4 on an inner periphery, an inner ring set 3 having rolling surfaces 5 that face the rolling surfaces 4, and A double row rolling element 6 interposed between the rolling surfaces 4 and 5 of the row. The outer ring 2 is an integral type, and has a hub flange 2a for wheel attachment on the outer periphery. The inner ring set 3 is a split type in which two inner rings 3A and 3A each having a single row of rolling surfaces 5 are arranged side by side in the axial direction and abut each other at the end faces. It is said that. The inner ring set 3 is fitted and fixed to the outer periphery of a shaft (not shown). The rolling elements 6 are held by a holder 7 for each row. Both ends of the annular space formed between the inner and outer rings 3 and 2 are sealed by a pair of sealing means 8 and 9.

前記内輪組３を構成する２個の内輪３Ａ，３Ａの互いに突き合わせられる端面間には、これら２個の内輪３Ａ，３Ａ間に作用する軸力（内輪組３の幅方向の固定力）、軸受温度、内外輪２，３間の相対的な回転速度の各特性を検出するセンサ１０が介在させてある。なお、センサ１０は、前記軸力、軸受温度、回転速度の各特性のうちの少なくとも一つの特性を検出するものであっても良い。センサ１０は、２個の内輪３Ａの互いに突き合わせられる端面間に介在するリング状のセンサ素子取付リング１１と、このセンサ素子取付リング１１に取付けられたセンサ素子１２，１３，１４（図１，図２）とでなる。ここでは、軸力を検出するセンサ素子１２として歪みゲージが、軸受温度を検出するセンサ素子１３として熱電対ゲージが、回転速度を検出するセンサ素子１４（図１）として磁気センサがそれぞれ用いられる。磁気センサからなるセンサ素子１４のセンサターゲットとして、外輪２の内周におけるセンサ１０と径方向に対向する位置には、リング状の磁気エンコーダ１５が取付けられる。磁気エンコーダ１５は、円周方向に磁極Ｎ，Ｓを交互に設けた多極磁石である。   Between the end faces of the two inner rings 3A, 3A that make up the inner ring set 3, the axial force acting between these two inner rings 3A, 3A (fixing force in the width direction of the inner ring set 3), a bearing Sensors 10 for detecting the characteristics of the temperature and the relative rotational speed between the inner and outer rings 2 and 3 are interposed. The sensor 10 may detect at least one of the characteristics of the axial force, the bearing temperature, and the rotational speed. The sensor 10 includes a ring-shaped sensor element mounting ring 11 interposed between the end faces of the two inner rings 3A that face each other, and sensor elements 12, 13, and 14 mounted on the sensor element mounting ring 11 (FIG. 1, FIG. 1). 2). Here, a strain gauge is used as the sensor element 12 that detects the axial force, a thermocouple gauge is used as the sensor element 13 that detects the bearing temperature, and a magnetic sensor is used as the sensor element 14 (FIG. 1) that detects the rotation speed. A ring-shaped magnetic encoder 15 is attached as a sensor target of the sensor element 14 composed of a magnetic sensor at a position facing the sensor 10 on the inner circumference of the outer ring 2 in the radial direction. The magnetic encoder 15 is a multipolar magnet in which magnetic poles N and S are alternately provided in the circumferential direction.

軸受温度を検出するセンサ素子１３は、図２のように、センサ素子取付リング１１の外周部における前記センサ素子１４とは異なる周方向位置に取付けられる。軸力を検出するセンサ素子１２は、センサ素子取付リング１１の内周部に、その両端面から若干軸方向に突出するように取付けられる。磁気センサからなるセンサ素子１４は、センサ素子取付リング１１の外周部に取付けられる。   As shown in FIG. 2, the sensor element 13 that detects the bearing temperature is attached at a circumferential position different from the sensor element 14 in the outer peripheral portion of the sensor element attachment ring 11. The sensor element 12 for detecting the axial force is attached to the inner peripheral portion of the sensor element attachment ring 11 so as to slightly protrude in the axial direction from both end faces. A sensor element 14 made of a magnetic sensor is attached to the outer periphery of the sensor element attachment ring 11.

前記２個の内輪３Ａのうち一方の内輪３Ａには、前記センサ１０の配線１６を引き出すための軸方向配線溝１７と径方向配線溝１８が設けられている。軸方向配線溝１７は、内輪３Ａの内径面に軸方向に延びて形成される。この軸方向配線溝１７は、例えば図１の矢印Ｐで示す方向から見た正面図を示す図３（Ａ），（Ｂ）のように、断面半円形や断面方形とされる。径方向配線溝１８は、内輪３Ａの外側の端面における前記軸方向配線溝１７が臨む周方向位置において、径方向に延びて形成される。径方向配線溝１８も、軸方向配線溝１７と同様の断面形状とされる。センサ１０の配線１６の端部には、外部の回路と接続するためのコネクタ１９が接続されている。センサ１０の配線１６は、図４のように軸方向配線溝１７に沿わせて内輪３Ａの外側端面に向けて引き出し、図５のように径方向配線溝１８に沿わせて外側端面の外径側に引き出す。これにより、センサ１０の配線１６が内輪組３と図示しない軸との間に強く押し付け状態に挟まるのを防止できる。   One inner ring 3A of the two inner rings 3A is provided with an axial wiring groove 17 and a radial wiring groove 18 for drawing out the wiring 16 of the sensor 10. The axial wiring groove 17 is formed to extend in the axial direction on the inner diameter surface of the inner ring 3A. The axial wiring groove 17 has, for example, a semicircular cross section or a square cross section, as shown in FIGS. 3A and 3B showing front views viewed from the direction indicated by the arrow P in FIG. The radial wiring groove 18 is formed to extend in the radial direction at a circumferential position where the axial wiring groove 17 faces on the outer end face of the inner ring 3A. The radial wiring groove 18 also has the same cross-sectional shape as the axial wiring groove 17. A connector 19 for connecting to an external circuit is connected to the end of the wiring 16 of the sensor 10. The wiring 16 of the sensor 10 is drawn out toward the outer end face of the inner ring 3A along the axial wiring groove 17 as shown in FIG. 4, and the outer diameter of the outer end face along the radial wiring groove 18 as shown in FIG. Pull it out to the side. Thereby, it is possible to prevent the wiring 16 of the sensor 10 from being strongly pressed between the inner ring set 3 and a shaft (not shown).

この構成の車輪用軸受装置１によると、２個の内輪３Ａ，３Ａの互いに突き合わせられる端面間に、これら２個の内輪３Ａ，３Ａ間に作用する軸力、軸受温度、内外輪３，２間の相対的な回転速度のうちの少なくとも一つの特性を検出するセンサ１０を介在させたため、軸受を大型化することなく、前記軸力（軸受の固定状態）、軸受温度、回転速度などの各種軸受情報を検出することができる。   According to the wheel bearing device 1 having this configuration, the axial force acting between the two inner rings 3A and 3A, the bearing temperature, and the distance between the inner and outer rings 3 and 2 between the end surfaces of the two inner rings 3A and 3A that face each other. Since the sensor 10 for detecting at least one characteristic of the relative rotational speed of the motor is interposed, various types of bearings such as the axial force (the bearing fixed state), the bearing temperature, and the rotational speed can be obtained without increasing the size of the bearing. Information can be detected.

また、前記センサ１０は、前記２個の内輪３Ａ，３Ａの互いに付き合わせられる端面間に介在するリング状のセンサ素子取付リング１１に、センサ素子１２，１３，１４を取付けて構成されるので、軸受へのセンサ１０の組付を容易に行うことができる。   In addition, the sensor 10 is configured by attaching sensor elements 12, 13, and 14 to a ring-shaped sensor element mounting ring 11 interposed between end faces of the two inner rings 3A and 3A that are attached to each other. The sensor 10 can be easily assembled to the bearing.

図６は、この発明の他の実施形態を示す。この実施形態では、図１〜図５に示す車輪用軸受装置１において、配線１６を配線固定手段２０で内輪３Ａに固定して、配線１６が緩むのを防止するようにしている。ここでは、配線固定手段２０として接着剤を用いて、前記径方向配線溝１８に配線１６を固定している。   FIG. 6 shows another embodiment of the present invention. In this embodiment, in the wheel bearing device 1 shown in FIGS. 1 to 5, the wiring 16 is fixed to the inner ring 3 </ b> A by the wiring fixing means 20 to prevent the wiring 16 from loosening. Here, the wiring 16 is fixed to the radial wiring groove 18 by using an adhesive as the wiring fixing means 20.

図７は、この発明のさらに他の実施形態を示す。この実施形態では、図１〜図５に示す車輪用軸受装置１において、センサ１０を構成するセンサ素子取付リング１１の内輪３Ａに対する相対回転を阻止する回り止め手段２１を設けている。ここでは、回り止め手段２１が、前記軸方向配線溝１７および径方向配線溝１８とは別に内輪３Ａに設けた係止溝２２と、センサ素子取付リング１１に設けられて前記係止溝２２に係合する係止突部２３とでなる。前記係止溝２２は、センサ素子取付リング１１に突き合わせられる内輪３Ａの端面の周方向の複数箇所に設けられる。センサ素子取付リング１１は、リング状芯金１１Ｂの外周にセンサ素子取付リング本体１１Ａを固定してなり、そのリング状芯金１１Ｂの前記内輪３Ａに突き合わせられる端面の周方向の複数箇所に前記係止突部２３が設けられる。   FIG. 7 shows still another embodiment of the present invention. In this embodiment, the wheel bearing device 1 shown in FIGS. 1 to 5 is provided with a rotation preventing means 21 for preventing relative rotation of the sensor element mounting ring 11 constituting the sensor 10 with respect to the inner ring 3A. Here, the rotation prevention means 21 is provided in the inner ring 3A separately from the axial wiring groove 17 and the radial wiring groove 18 and in the sensor element mounting ring 11 and in the locking groove 22. The engaging projection 23 is engaged. The locking grooves 22 are provided at a plurality of locations in the circumferential direction of the end surface of the inner ring 3 </ b> A that abuts against the sensor element mounting ring 11. The sensor element mounting ring 11 is formed by fixing the sensor element mounting ring body 11A to the outer periphery of the ring-shaped cored bar 11B, and the engagement is performed at a plurality of positions in the circumferential direction of the end surface of the ring-shaped cored bar 11B butted against the inner ring 3A. A stop projection 23 is provided.

このように、センサ素子取付リング１１の内輪３Ａに対する相対回転を阻止する回り止め手段２１を設けることにより、センサ１０の配線１６が上記相対回転で引っ張られて断線するなどの不具合の発生を防止できる。また、内輪３Ａに設けた係止溝２２と、センサ素子取付リング１１に設けた係止突部２３で回り止め手段２１を構成することにより、軸受を大型化することなく上記相対回転を阻止することができる。   Thus, by providing the rotation preventing means 21 for preventing the relative rotation of the sensor element mounting ring 11 with respect to the inner ring 3A, it is possible to prevent the occurrence of problems such as the wiring 16 of the sensor 10 being pulled by the relative rotation and being disconnected. . Further, the locking groove 22 provided in the inner ring 3A and the locking protrusion 23 provided in the sensor element mounting ring 11 constitute the rotation preventing means 21, thereby preventing the relative rotation without increasing the size of the bearing. be able to.

図８は、この発明のさらに他の実施形態を示す。この車輪用軸受装置１Ａは、図１〜図５に示す車輪用軸受装置１の構成を、第１世代型に分類される複列の円すいころ軸受型であり、外輪回転タイプでかつ従動輪支持用の軸受に起用したものである。すなわち、この車輪用軸受装置１Ａでは、外輪２はハブ輪兼用ではなくハブフランジを有しない。その他の構成は図１〜図５の車輪用軸受装置１と同様である。   FIG. 8 shows still another embodiment of the present invention. This wheel bearing device 1A is a double-row tapered roller bearing type classified as a first generation type in the configuration of the wheel bearing device 1 shown in FIGS. 1 to 5, and is an outer ring rotating type and driven wheel support. This is used for the bearings for industrial use. That is, in this wheel bearing device 1A, the outer ring 2 is not used as a hub wheel and does not have a hub flange. The other structure is the same as that of the wheel bearing apparatus 1 of FIGS.

図９は、この発明のさらに他の実施形態を示す。この実施形態では、図１〜図５に示す車輪用軸受装置１において、内輪３Ａの内径面に軸方向配線溝１７を設けるのに替えて、内輪組３が嵌合する軸２６の外径面における１個の内輪３Ａと嵌合する部分に、センサ１０の配線１６を引き出す軸方向配線溝２７を軸方向に延ばして設けている。その他の構成は図１〜図５の車輪用軸受装置１と同様である。   FIG. 9 shows still another embodiment of the present invention. In this embodiment, in the wheel bearing device 1 shown in FIGS. 1 to 5, instead of providing the axial wiring groove 17 on the inner diameter surface of the inner ring 3 </ b> A, the outer diameter surface of the shaft 26 to which the inner ring set 3 is fitted. An axial wiring groove 27 for extending the wiring 16 of the sensor 10 is provided extending in the axial direction at a portion that fits with one inner ring 3A. The other structure is the same as that of the wheel bearing apparatus 1 of FIGS.

この発明の一実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning one Embodiment of this invention. 同車輪用軸受装置における他の周方向位置での断面図である。It is sectional drawing in the other circumferential direction position in the wheel bearing apparatus. （Ａ）は図１における矢印Ｐ方向から見た軸方向配線溝の断面形状の一例を示し、（Ｂ）は他の例の断面形状を示す。(A) shows an example of the cross-sectional shape of the axial wiring groove | channel seen from the arrow P direction in FIG. 1, (B) shows the cross-sectional shape of another example. 同車輪用軸受装置におけるセンサ配線の引き出し処理の説明図である。It is explanatory drawing of the drawing-out process of the sensor wiring in the bearing apparatus for wheels. 同車輪用軸受装置におけるセンサ配線の引き出し処理完了の説明図である。It is explanatory drawing of completion of the drawing-out process of the sensor wiring in the bearing device for wheels. この発明の他の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning other embodiment of this invention. この発明のさらに他の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning other embodiment of this invention. この発明のさらに他の実施形態にかかる車輪用軸受装置の断面図である．It is sectional drawing of the wheel bearing apparatus concerning other embodiment of this invention. この発明のさらに他の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning other embodiment of this invention. 従来例の断面図である。It is sectional drawing of a prior art example.

符号の説明Explanation of symbols

１，１Ａ…車輪用軸受装置
２…外輪
３…内輪組
３Ａ…内輪
４，５…転走面
６…転動体
１０…センサ
１１…センサ素子取付リング
１２〜１４…センサ素子
１６…配線
１７…軸方向配線溝
１８・・・径方向配線溝
１９・・・コネクタ
２０…配線固定手段
２１…回り止め手段
２２…係止溝
２３…係止突部
２６…軸
２７…軸方向配線溝 DESCRIPTION OF SYMBOLS 1,1A ... Wheel bearing device 2 ... Outer ring 3 ... Inner ring set 3A ... Inner ring 4, 5 ... Rolling surface 6 ... Rolling body 10 ... Sensor 11 ... Sensor element mounting ring 12-14 ... Sensor element 16 ... Wiring 17 ... Axis Directional wiring groove 18 ... Radial direction wiring groove 19 ... Connector 20 ... Wiring fixing means 21 ... Anti-rotation means 22 ... Locking groove 23 ... Locking protrusion 26 ... Shaft 27 ... Axial wiring groove

Claims (9)

それぞれ外周に単列の転走面を有し軸方向に並んで配置されて互いに端面で突き合わせられた２個の内輪と、これら２個の内輪の各転走面に対向する複列の転走面を内周に有する外輪と、これら内外輪の転走面間に介在した複列の転動体とを備えた車輪用軸受装置であって、前記２個の内輪の互いに突き合わせられる端面間に、これら２個の内輪間に作用する軸力、軸受温度、内外輪間の相対的な回転速度のうちの少なくとも一つの特性を検出するセンサを介在させたことを特徴とする車輪用軸受装置。   Two inner rings each having a single row of rolling surfaces on the outer circumference and arranged side by side in the axial direction and butted against each other at the end surfaces, and double row rolling facing each rolling surface of these two inner rings A bearing device for a wheel comprising an outer ring having a surface on the inner periphery and a double row rolling element interposed between the rolling surfaces of the inner and outer rings, between the end surfaces of the two inner rings that are brought into contact with each other, A wheel bearing device comprising a sensor for detecting at least one of a characteristic of an axial force acting between the two inner rings, a bearing temperature, and a relative rotational speed between the inner and outer rings. 請求項１において、前記センサが、前記２個の内輪の互いに突き合わせられる端面間に介在するリング状のセンサ素子取付リングと、このセンサ素子取付リングに取付けられたセンサ素子とでなる車輪用軸受装置。   The wheel bearing device according to claim 1, wherein the sensor includes a ring-shaped sensor element mounting ring interposed between end faces of the two inner rings that are abutted with each other, and a sensor element mounted on the sensor element mounting ring. . 請求項１または請求項２において、前記内輪の内径面に、前記センサの配線を引き出す配線溝を設けた車輪用軸受装置。   3. The wheel bearing device according to claim 1 or 2, wherein a wiring groove for leading out the wiring of the sensor is provided on an inner diameter surface of the inner ring. 請求項１または請求項２において、前記内輪が軸の外周に嵌合し、この軸の外径面における前記内輪と嵌合する部分に、前記センサの配線を引き出す配線溝を設けた車輪用軸受装置。   3. The wheel bearing according to claim 1 or 2, wherein the inner ring is fitted to an outer periphery of a shaft, and a wiring groove for drawing the wiring of the sensor is provided in a portion of the outer diameter surface of the shaft fitted with the inner ring. apparatus. 請求項３または請求項４において、前記配線を前記内輪に配線固定手段で固定した車輪用軸受装置。   The wheel bearing device according to claim 3 or 4, wherein the wiring is fixed to the inner ring by wiring fixing means. 請求項５において、前記配線を、前記配線固定手段として接着剤を用いて固定した車輪用軸受装置。   6. The wheel bearing device according to claim 5, wherein the wiring is fixed using an adhesive as the wiring fixing means. 請求項１において、前記センサが、前記２個の内輪の互いに突き合わせられる端面間に介在するリング状のセンサ素子取付リングと、このセンサ素子取付リングに取付けられたセンサ素子とでなり、前記内輪の内径面に前記センサの配線を引き出す配線溝を設け、前記センサ素子取付リングの前記内輪に対する相対回転を阻止する回り止め手段を設けた車輪用軸受装置。   2. The sensor according to claim 1, wherein the sensor includes a ring-shaped sensor element mounting ring interposed between end faces of the two inner rings that face each other, and a sensor element that is mounted on the sensor element mounting ring. A wheel bearing device provided with a wiring groove for drawing out the sensor wiring on an inner diameter surface and provided with a rotation preventing means for preventing relative rotation of the sensor element mounting ring with respect to the inner ring. 請求項７において、前記回り止め手段が、前記配線溝とは別に内輪に設けた係止溝と、前記センサ素子取付リングに設けられて前記係止溝に係合する係止突部とでなる車輪用軸受装置。   8. The anti-rotation means according to claim 7, comprising: a locking groove provided in an inner ring separately from the wiring groove; and a locking protrusion provided in the sensor element mounting ring and engaged with the locking groove. Wheel bearing device. 請求項１ないし請求項８のいずれか１項において、前記軸力を検出するセンサ素子は歪みゲージ、前記軸受温度を検出するセンサ素子は熱電対ゲージ、前記内外輪間の相対的な回転速度を検出するセンサ素子は磁気センサである車輪用軸受装置。
9. The sensor element according to claim 1, wherein the sensor element that detects the axial force is a strain gauge, the sensor element that detects the bearing temperature is a thermocouple gauge, and a relative rotational speed between the inner and outer rings. A wheel bearing device in which a sensor element to be detected is a magnetic sensor.
JP2007331438A 2007-12-25 2007-12-25 Bearing device for wheel Pending JP2009156269A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012018081A (en) * 2010-07-08 2012-01-26 Denso Corp Magnetism detector, rotation angle detector using the same, and stroke amount detector
WO2012029586A1 (en) * 2010-09-03 2012-03-08 Ntn株式会社 Bearing with rotation sensor
JP2012053002A (en) * 2010-09-03 2012-03-15 Ntn Corp Bearing with rotation sensor
JP2013019770A (en) * 2011-07-12 2013-01-31 Nippon Steel & Sumitomo Metal Load measuring device
CN110307125A (en) * 2019-05-14 2019-10-08 沈阳工程学院 A kind of wind generator set main shaft holds internal temperature indirect measurement method
WO2019220794A1 (en) * 2018-05-14 2019-11-21 ソニー株式会社 Vehicle wheel

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012018081A (en) * 2010-07-08 2012-01-26 Denso Corp Magnetism detector, rotation angle detector using the same, and stroke amount detector
WO2012029586A1 (en) * 2010-09-03 2012-03-08 Ntn株式会社 Bearing with rotation sensor
JP2012053002A (en) * 2010-09-03 2012-03-15 Ntn Corp Bearing with rotation sensor
CN103080698A (en) * 2010-09-03 2013-05-01 Ntn株式会社 Bearing with rotation sensor
US9752617B2 (en) 2010-09-03 2017-09-05 Ntn Corporation Bearing assembly with rotation sensor
JP2013019770A (en) * 2011-07-12 2013-01-31 Nippon Steel & Sumitomo Metal Load measuring device
WO2019220794A1 (en) * 2018-05-14 2019-11-21 ソニー株式会社 Vehicle wheel
CN110307125A (en) * 2019-05-14 2019-10-08 沈阳工程学院 A kind of wind generator set main shaft holds internal temperature indirect measurement method

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