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JP2007192362A - Rolling bearing device for vehicle - Google Patents

Rolling bearing device for vehicle Download PDF

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Publication number
JP2007192362A
JP2007192362A JP2006012628A JP2006012628A JP2007192362A JP 2007192362 A JP2007192362 A JP 2007192362A JP 2006012628 A JP2006012628 A JP 2006012628A JP 2006012628 A JP2006012628 A JP 2006012628A JP 2007192362 A JP2007192362 A JP 2007192362A
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Japan
Prior art keywords
rolling bearing
bearing device
resin cover
ring
vehicle
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JP2006012628A
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Japanese (ja)
Inventor
Tokuji Kamimura
篤司 上村
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JTEKT Corp
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JTEKT Corp
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Priority to JP2006012628A priority Critical patent/JP2007192362A/en
Publication of JP2007192362A publication Critical patent/JP2007192362A/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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/768—Sealings of ball or roller bearings between relatively stationary parts, i.e. static seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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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 device for a vehicle which can suppress insulation failure or dust generation caused by moisture over a long period of time. <P>SOLUTION: A rolling bearing device H1 for a vehicle comprises a rolling bearing 13 including an inner ring 11 of a turning wheel, an outer ring 12 serving as a fixed ring, and rolling elements 3, 4 located between both the rings 11, 12; a magnetic body 14; a magnetic sensor 15; and a resin cover 16. A metal film 21 is formed on the inner wall of the resin cover 16, and an elastic seal lip 31 is arranged in the attaching portion of the fixed outer ring 12 and the resin cover 16. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えばＡＢＳ（アンチロックブレーキシステム）に用いられる車両用転がり軸受装置に関する。   The present invention relates to a rolling bearing device for a vehicle used in, for example, an ABS (anti-lock brake system).

ＡＢＳ（アンチロックブレーキシステム）を搭載する自動車には、従動輪を回転自在に支持する転がり軸受に磁気センサを取り付けた車両用転がり軸受装置が用いられている。そして、この車両用転がり軸受装置には、磁気センサに対向して配置される環状の着磁体（着磁パルサーリング）を保護し、泥水が付着しないようにすべく、カバーが取り付けられている。このカバーとしては、軽量化などを考慮して、樹脂製のものがよく用いられるようになってきている。ところが、樹脂製のカバーであると、樹脂自体が吸湿性を有しているため、カバー外側の大気中の水分を吸収し、その水分が温度変化などによりカバー内側へも放出されてしまい、長期使用の結果、磁気センサに水分による絶縁不良や錆発生といった不具合が発生してしまうという問題があった。   In automobiles equipped with ABS (anti-lock brake system), a rolling bearing device for a vehicle in which a magnetic sensor is attached to a rolling bearing that rotatably supports a driven wheel is used. A cover is attached to the rolling bearing device for a vehicle so as to protect an annular magnetized body (magnetized pulsar ring) disposed opposite to the magnetic sensor and prevent muddy water from adhering. As this cover, a resin-made cover is increasingly used in consideration of weight reduction and the like. However, in the case of a resin cover, since the resin itself has a hygroscopic property, moisture in the atmosphere outside the cover is absorbed, and the moisture is also released to the inside of the cover due to a temperature change or the like. As a result of use, there has been a problem that the magnetic sensor has problems such as poor insulation due to moisture and generation of rust.

また、樹脂製カバーは金属製に比べて寸法精度が悪いためにカバーと転がり軸受との間に微小隙間が形成されやすく、そのためその微小隙間から水分が侵入して同様に磁気センサに水分による絶縁不良や錆発生といった不具合が発生してしまうという問題があった。この問題に対して、特許文献１にはＯリングを用いて外部からの水分の侵入を抑制する技術が開示されている（例えば特許文献１参照）。ところが、このようなＯリングは、カバーの熱変形やガタなどに起因する軸方向への移動に対して許容量が小さく、長期にわたってカバー内部への水分侵入抑制効果を確保するのが難しいという問題があった。   In addition, since the resin cover has a lower dimensional accuracy than metal, a minute gap is likely to be formed between the cover and the rolling bearing, so that moisture can penetrate through the minute gap and similarly insulate the magnetic sensor with moisture. There was a problem that defects such as defects and rust occurred. With respect to this problem, Patent Document 1 discloses a technique for suppressing the intrusion of moisture from the outside using an O-ring (see, for example, Patent Document 1). However, such an O-ring has a small allowable amount with respect to movement in the axial direction due to thermal deformation or backlash of the cover, and it is difficult to ensure the effect of suppressing moisture intrusion into the cover over a long period of time. was there.

特開平１０−６８７３８号公報（第４頁）Japanese Patent Laid-Open No. 10-68738 (page 4)

本発明はこのような事情に鑑みなされたものであり、水分による絶縁不良や錆発生を長期にわたり抑制することができる車両用転がり軸受装置の提供をその目的とする。   This invention is made | formed in view of such a situation, and the objective is to provide the rolling bearing device for vehicles which can suppress the insulation defect and rust generation | occurrence | production by water | moisture content over a long period of time.

本発明の第１の車両用転がり軸受装置は、回転輪である内輪と固定輪である外輪と両輪間に介在される転動体とを有する転がり軸受と、前記回転輪の軸方向一方側に配設される着磁体と、その着磁体に対向して配置される磁気センサと、前記着磁体と磁気センサとの対向部分を密封するために固定輪に取り付けられる樹脂製カバーとを備えた車両用転がり軸受装置であって、前記樹脂製カバーの内壁面に金属膜を形成したことを特徴としている。   A first rolling bearing device for a vehicle according to the present invention includes a rolling bearing having an inner ring that is a rotating ring, an outer ring that is a fixed ring, and a rolling element interposed between the two rings, and one axial direction side of the rotating ring. A vehicle comprising: a magnetized body provided; a magnetic sensor disposed opposite to the magnetized body; and a resin cover attached to a fixed ring to seal a facing portion between the magnetized body and the magnetic sensor In the rolling bearing device, a metal film is formed on the inner wall surface of the resin cover.

上記の構成によれば、樹脂製カバーの内壁面に金属膜を形成しているので、樹脂が大気中の水分を吸収し、その水分が温度変化などにより放出されたとしても、樹脂製カバーの内側に放出されるのが抑制される。すなわち、金属膜が水分の透過障壁として機能するため、長期使用によって着磁体と磁気センサとの対向部分の湿度が高くなることが抑制される。その結果、磁気センサに対して水分による絶縁不良や錆発生といった不具合が発生してしまうのを抑制することができる。また、金属膜を樹脂製カバーの内壁面に形成していることから、飛石などによる金属膜の損傷を抑制できるという利点を有する。   According to the above configuration, since the metal film is formed on the inner wall surface of the resin cover, even if the resin absorbs moisture in the atmosphere and the moisture is released due to a temperature change or the like, the resin cover Release to the inside is suppressed. That is, since the metal film functions as a moisture permeation barrier, it is possible to suppress the humidity of the facing portion between the magnetized body and the magnetic sensor from being increased by long-term use. As a result, it is possible to suppress the occurrence of problems such as poor insulation due to moisture and the occurrence of rust on the magnetic sensor. Further, since the metal film is formed on the inner wall surface of the resin cover, there is an advantage that damage to the metal film due to flying stones can be suppressed.

上記第１の車両用転がり軸受装置において、前記金属膜が非磁性材で形成されているのが好ましい。この場合、金属膜が磁気センサの検知結果に大きく影響することがないので、磁気センサの検知精度が高くなる。   In the first rolling bearing device for a vehicle, the metal film is preferably formed of a nonmagnetic material. In this case, since the metal film does not greatly affect the detection result of the magnetic sensor, the detection accuracy of the magnetic sensor is increased.

本発明の第２の車両用転がり軸受装置は、回転輪である内輪と固定輪である外輪と両輪間に介在される転動体とを有する転がり軸受と、前記回転輪の軸方向一方側に配設される着磁体と、その着磁体に対向して配置される磁気センサと、前記着磁体と磁気センサとの対向部分を密封するために固定輪に取り付けられる樹脂製カバーとを備えた車両用転がり軸受装置であって、前記樹脂製カバーと固定輪との取り付け部に弾性体製のシールリップを配設して、前記着磁体と磁気センサとの対向部分を密封するようにしたことを特徴としている。   A second rolling bearing device for a vehicle according to the present invention includes a rolling bearing having an inner ring that is a rotating ring, an outer ring that is a fixed ring, and a rolling element interposed between the two rings, and one axial direction of the rotating ring. A vehicle comprising: a magnetized body provided; a magnetic sensor disposed opposite to the magnetized body; and a resin cover attached to a fixed ring to seal a facing portion between the magnetized body and the magnetic sensor In the rolling bearing device, a seal lip made of an elastic body is disposed at an attachment portion between the resin cover and the fixed ring so that a facing portion between the magnetized body and the magnetic sensor is sealed. It is said.

上記の構成によれば、前記樹脂製カバーと固定輪との取り付け部に弾性体製のシールリップを配設して前記着磁体と磁気センサとの対向部分を密封するようにしているので、前記取り付け部に形成された微小隙間から水分が侵入するのを有効に抑制することができる。しかも、弾性体製のシールリップであることから、カバーの熱変形やガタなどに起因する軸方向への移動に対して許容量が大きくなり、より長期にわたってカバー内部への水分侵入抑制効果を確保することができる。   According to the above configuration, an elastic seal lip is disposed at the attachment portion between the resin cover and the fixed ring so as to seal a facing portion between the magnetized body and the magnetic sensor. It is possible to effectively prevent moisture from entering through the minute gap formed in the attachment portion. In addition, the seal lip made of an elastic material increases the allowable amount against axial movement caused by thermal deformation or backlash of the cover, ensuring the effect of suppressing moisture penetration into the cover for a longer period of time. can do.

また、上記第１及び第２の車両用転がり軸受装置において、前記樹脂製カバーの内壁側に乾燥剤を配置するのが好ましい。この場合、乾燥剤によって樹脂製カバー内の空間における湿度を低くすることができることから、前記金属膜やシールリップによる水分侵入抑制効果と相俟って、より長期にわたって磁気センサに対し水分による絶縁不良や錆発生といった不具合が発生するのを抑制することができる。   In the first and second vehicle rolling bearing devices, it is preferable that a desiccant is disposed on the inner wall side of the resin cover. In this case, since the humidity in the space inside the resin cover can be lowered by the desiccant, in combination with the moisture intrusion suppression effect by the metal film and the seal lip, insulation failure due to moisture for a longer period of time And the occurrence of problems such as rusting can be suppressed.

本発明の第１の車両用転がり軸受装置によれば、樹脂製カバーの内壁面に金属膜を形成しているので、長期にわたり磁気センサに対し水分による絶縁不良や錆発生といった不具合が発生するのを有効に抑制することができる。また、本発明の第２の車両用転がり軸受装置によれば、樹脂製カバーと固定輪との取り付け部に弾性体製シールリップを配設して前記着磁体と磁気センサとの対向部分を密封するようにしていることから、同様に、長期にわたり磁気センサに対し水分による絶縁不良や錆発生といった不具合が発生するのを有効に抑制することができる。   According to the first rolling bearing device for a vehicle of the present invention, since the metal film is formed on the inner wall surface of the resin cover, problems such as poor insulation due to moisture and generation of rust occur over a long period of time. Can be effectively suppressed. Further, according to the second rolling bearing device for a vehicle of the present invention, an elastic seal lip is disposed at an attachment portion between the resin cover and the fixed ring to seal a facing portion between the magnetized body and the magnetic sensor. Thus, similarly, it is possible to effectively suppress the occurrence of problems such as insulation failure due to moisture and the occurrence of rust on the magnetic sensor over a long period of time.

以下、本発明の好ましい実施形態について図面を参照しつつ説明する。図１は、本発明の第１の実施形態に係る車両用転がり軸受装置を示す断面図である。本実施の形態に係る車両用転がり軸受装置Ｈ１は、自動車の従動輪側に配設されるものであり、回転輪である内輪１１と固定輪である外輪１２と両輪間に介在される転動体３、４とを有する転がり軸受としての複列アンギュラ玉軸受１３と、前記内輪１１の軸方向一方側（インボード側、図１では右側）に配設される環状の着磁体（着磁パルサーリング）１４と、その着磁体１４に対向して配置される磁気センサ１５と、前記着磁体１４と磁気センサ１５との対向部分を密封するために外輪１２に取り付けられる樹脂製カバー１６とを備えて構成されている。   Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a rolling bearing device for a vehicle according to a first embodiment of the present invention. The rolling bearing device H1 for a vehicle according to the present embodiment is disposed on the driven wheel side of an automobile, and is a rolling element that is interposed between an inner ring 11 that is a rotating wheel, an outer ring 12 that is a fixed wheel, and both wheels. And a double-row angular contact ball bearing 13 as a rolling bearing having three and four, and an annular magnetized body (magnetized pulser ring) disposed on one side (inboard side, right side in FIG. 1) of the inner ring 11 in the axial direction. ) 14, a magnetic sensor 15 disposed opposite to the magnetized body 14, and a resin cover 16 attached to the outer ring 12 for sealing the facing portion between the magnetized body 14 and the magnetic sensor 15. It is configured.

複列アンギュラ玉軸受１３は、軸方向他方側（アウターボード側、図１では左側）に配置された第１の内輪部材１と、この第１の内輪部材１の軸方向一方側（インボード側）に配置された第２の内輪部材２と、第１及び第２の内輪部材１、２に外装された外輪１２と、第１及び第２の内輪部材１、２と外輪１２との間に介在され軸方向に二列に並んだ転動体としての玉（ボール）３、４と、これら玉（ボール）３、４を保持する冠型保持器１７、１８と、内輪１１と外輪１２とにより形成された環状空間を密封するためのシール部材１９とを備えている。   The double row angular contact ball bearing 13 includes a first inner ring member 1 disposed on the other axial side (outer board side, left side in FIG. 1), and one axial side of the first inner ring member 1 (inboard side). Between the first and second inner ring members 1 and 2 and the outer ring 12. Balls 3 and 4 as rolling elements that are interposed and arranged in two rows in the axial direction, crown-shaped cages 17 and 18 that hold these balls 3 and 4, and inner ring 11 and outer ring 12 And a sealing member 19 for sealing the formed annular space.

詳細には、第１の内輪部材１は、その軸方向他方側（アウターボード側）に径方向外方に向かって延設されたフランジ部１ａと、このフランジ部１ａの根元部分から軸方向一方側（インボード側）に向かって延びる略円柱状に形成された円柱部１ｂとを有し、さらにフランジ部１ａの根元部分の近傍に第１の軌道部１ｃと、円柱部１ｂの軸方向一方側（インボード側）に周方向に形成された凹条１ｄとを有している。第１の内輪部材１のフランジ部１ａには、貫通孔（締結孔）１ｅが複数形成されており、これら貫通孔（締結孔）１ｅにボルトなどの締結部材Ｂを通過させて、車輪のホイール（図示せず）に締結することができるように構成されている。 Specifically, the first inner ring member 1 includes a flange portion 1a extending radially outward on the other axial side (outer board side), and one axial direction from the root portion of the flange portion 1a. A cylindrical portion 1b formed in a substantially cylindrical shape extending toward the side (inboard side), and further, a first track portion 1c in the vicinity of the root portion of the flange portion 1a and one axial direction of the cylindrical portion 1b. It has a recess 1d formed in the circumferential direction on the side (inboard side). A plurality of through-holes (fastening holes) 1e are formed in the flange portion 1a of the first inner ring member 1, and a fastening member B such as a bolt is passed through these through-holes (fastening holes) 1e. It is comprised so that it can fasten (not shown).

また、第２の内輪部材２は、その外周面に第２の軌道部２ａを有しているとともに、第１の内輪部材１の凹条１ｄにぴったりと嵌め込むことができるような形状に形成されており、第１の内輪部材１の凹条１ｄに嵌め込ませて取り付けることにより、第１の内輪部材１とともに従動させることができるようにされている。
一方、外輪１２は、その内周面に第１の軌道部１２ｂと第２の軌道部１２ｃとを有するとともに、径方向外方に向かって延設されたフランジ部１２ａを有している。このフランジ部１２ａは、車体のステアリングナックル（懸架装置）などに締結されて外輪１２が固定輪となるようにしている。なお、本実施の形態では玉（ボール）３、４が軸方向に二列に並んだ複列アンギュラ玉軸受１３を用いているが、本発明はこれに制限するものではなく、他の玉軸受やころ軸受であってもよいのは勿論である。 Further, the second inner ring member 2 has a second raceway portion 2a on the outer peripheral surface thereof, and is formed in a shape that can be fitted into the recess 1d of the first inner ring member 1 exactly. The first inner ring member 1 can be driven to be driven by being fitted into the recess 1d of the first inner ring member 1 and attached.
On the other hand, the outer ring 12 has a first raceway portion 12b and a second raceway portion 12c on its inner peripheral surface, and a flange portion 12a extending outward in the radial direction. The flange portion 12a is fastened to a steering knuckle (suspension device) or the like of the vehicle body so that the outer ring 12 becomes a fixed wheel. In this embodiment, the double-row angular contact ball bearing 13 in which balls (balls) 3 and 4 are arranged in two rows in the axial direction is used. However, the present invention is not limited to this, and other ball bearings are used. Of course, it may be a roller bearing.

着磁パルサーリング１４は、第２の内輪部材２の第２の軌道部２ａよりも軸方向一方側（インボード側）に配置された支持部材２０に貼着して取り付けられている。この着磁パルサーリング１４は、回転輪である内輪１１（第１の内輪部材１及び第２の内輪部材２）の回転数を検出するために用いられ、例えば磁石、エラストマーに磁性粉を配合したゴム磁石、樹脂に磁性粉を配合したプラスチック磁石などを用いて異極（Ｎ極とＢ極）を交互に円周方向に着磁した構成とされている。このような構成により、着磁パルサーリング１４と対向する磁気センサ（例えば磁気抵抗素子を有する磁気センサ）１５で磁性変化を検出することができ、その検出結果により内輪１１の回転数を検出することができる。   The magnetized pulsar ring 14 is attached to a support member 20 disposed on one axial side (inboard side) of the second inner ring member 2 with respect to the second raceway portion 2a. This magnetized pulsar ring 14 is used to detect the rotational speed of the inner ring 11 (the first inner ring member 1 and the second inner ring member 2), which is a rotating wheel. For example, magnets and elastomers are blended with magnetic powder. Different poles (N pole and B pole) are alternately magnetized in the circumferential direction using a rubber magnet, a plastic magnet in which magnetic powder is mixed with resin, or the like. With such a configuration, a magnetic change (for example, a magnetic sensor having a magnetoresistive element) 15 facing the magnetized pulsar ring 14 can be detected, and the number of rotations of the inner ring 11 is detected based on the detection result. Can do.

そして、樹脂製カバー１６の内壁面に金属膜２１が形成されている。これにより水分による絶縁不良や錆発生が抑制される。ここで、金属膜２１は、例えば各種の金属を蒸着して形成した蒸着膜であってもよいし、メッキして形成された金属膜であってもよいし、さらには薄い金属板を接着剤層を介して形成するようにしてもよい。金属膜２１の形成材料として、アルミニウム、銅、真鍮などの非磁性材を用いるのが好ましい。非磁性材であると、磁気センサ１５に対する影響が少ないため、検出精度を高めることができるからである。   A metal film 21 is formed on the inner wall surface of the resin cover 16. Thereby, insulation failure and rust generation due to moisture are suppressed. Here, the metal film 21 may be, for example, a deposited film formed by depositing various metals, a metal film formed by plating, or a thin metal plate as an adhesive. You may make it form through a layer. As a material for forming the metal film 21, a nonmagnetic material such as aluminum, copper, or brass is preferably used. This is because a non-magnetic material has little influence on the magnetic sensor 15 and can improve detection accuracy.

上記のように構成された車両用転がり軸受装置Ｈ１は、樹脂製カバー１６の内壁面に金属膜２１を形成しているので、樹脂製カバー１６が温度変化などによって大気中の水分を吸収したとしても、金属膜２１が水分透過に対する障壁となって樹脂製カバー１６内の湿度が高くなってしまうのを有効に抑制することができる。このため、長期使用によって磁気センサ１５に水分による絶縁不良や錆発生の問題が生じてしまうのを有効に抑制することができる。   In the rolling bearing device for a vehicle H1 configured as described above, since the metal film 21 is formed on the inner wall surface of the resin cover 16, the resin cover 16 absorbs moisture in the atmosphere due to a temperature change or the like. In addition, it is possible to effectively prevent the metal film 21 from becoming a barrier against moisture permeation and increasing the humidity in the resin cover 16. For this reason, it is possible to effectively suppress the problem of insulation failure and rust generation due to moisture in the magnetic sensor 15 due to long-term use.

なお、上記第１の実施形態において、金属膜の上に乾燥剤（シリカゲル、活性炭など）を配置（貼着）するようにしてもよい。このように乾燥剤を用いると、樹脂製カバー１６により形成される密閉空間内の湿度をより低くすることができるために、より一層磁気センサ１５の水分による絶縁不良や錆発生を抑制することができる。 In the first embodiment, a desiccant (silica gel, activated carbon, etc.) may be disposed (attached) on the metal film. When the desiccant is used in this manner, the humidity in the sealed space formed by the resin cover 16 can be further reduced, and thus the insulation failure and rust generation due to moisture of the magnetic sensor 15 can be further suppressed. it can.

図２は、第２の実施形態に係る車両用転がり軸受装置を示す断面図である。本実施形態に係る車両用転がり軸受装置Ｈ２は、第１の実施形態に係る車両用転がり軸受装置Ｈ１のように樹脂製カバー１６の内壁面に金属膜２１を形成せず、複列アンギュラ玉軸受１３の外輪１２と樹脂製カバー１６との取り付け部に弾性体製シールリップ３１を配設するようにしている。詳細には、弾性体製シールリップ３１は、各種のゴム、樹脂といった弾性を示す弾性体により形成されたものであり、複列アンギュラ玉軸受１３の外輪１２の軸方向一方側（インボード側）の外周面に接着させて取り付けているとともに、樹脂製カバー１６の外壁面に接触するように取り付けられている。このような弾性体製シールリップ３１を配設することにより、複列アンギュラ玉軸受１３の外輪１２と樹脂製カバー１６との取り付け部に形成された微小隙間から水分が侵入してしまうのを有効に抑制することができる。また、本実施の形態では、弾性体製シールリップ３１を外輪１２に接着させるとともに樹脂製カバー１６に対して接触させて取り付けていることから、樹脂製カバー１６の熱変形やガタなどによる軸方向へのずれに対して許容量が大きくなるという利点を有する。なお、図２において第１の実施形態と同一の部材については同一の番号を付しており、その詳細な説明は省略する。   FIG. 2 is a cross-sectional view showing a rolling bearing device for a vehicle according to a second embodiment. The rolling bearing device H2 for a vehicle according to the present embodiment does not form the metal film 21 on the inner wall surface of the resin cover 16 unlike the rolling bearing device for a vehicle H1 according to the first embodiment, and is a double-row angular ball bearing. An elastic seal lip 31 is disposed at the attachment portion between the outer ring 12 and the resin cover 16. Specifically, the elastic seal lip 31 is formed of an elastic body showing elasticity, such as various types of rubber and resin, and is one side (inboard side) in the axial direction of the outer ring 12 of the double row angular ball bearing 13. Are attached to the outer peripheral surface of the resin cover 16 and are attached so as to be in contact with the outer wall surface of the resin cover 16. By providing such an elastic seal lip 31, it is effective that moisture enters from a minute gap formed in the attachment portion between the outer ring 12 and the resin cover 16 of the double row angular ball bearing 13. Can be suppressed. In this embodiment, since the elastic seal lip 31 is attached to the outer ring 12 and in contact with the resin cover 16, the resin cover 16 is axially deformed due to thermal deformation or backlash. There is an advantage that the allowable amount is increased with respect to the deviation. In FIG. 2, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

図３は、第３の実施形態に係る車両用転がり軸受装置のシールリップ近傍を示す断面図である。本実施の形態に係る車両用転がり軸受装置は、第２の実施の形態に比べて、弾性体製シールリップ３２を樹脂製カバー１６の外壁面に接着させて取り付け、かつ複列アンギュラ玉軸受の外輪１２に接触するように取り付けた点で異なる。このようにしても第２の実施形態に係る車両用転がり軸受装置Ｈ２と同様の作用効果を奏する。   FIG. 3 is a cross-sectional view showing the vicinity of a seal lip of a rolling bearing device for a vehicle according to a third embodiment. Compared with the second embodiment, the rolling bearing device for a vehicle according to the present embodiment is attached by attaching an elastic seal lip 32 to the outer wall surface of the resin cover 16, and is a double-row angular ball bearing. The difference is that the outer ring 12 is attached so as to contact the outer ring 12. Even if it does in this way, there exists an effect similar to the rolling bearing device H2 for vehicles which concerns on 2nd Embodiment.

図４は、第４の実施形態に係る車両用転がり軸受装置のシールリップ近傍を示す断面図である。本実施の形態に係る車両用転がり軸受装置は、第２の実施の形態に比べて、複列アンギュラ玉軸受の外輪１２の軸方向一方側（インボード側）に傾斜面１２を形成して外輪１２と樹脂製カバー１６との取り付け部に空間を形成し、その空間に弾性体製シールリップ３３を外輪１２を配置するようにした点で異なる。詳細には、弾性体製シールリップ３３を外輪１２に接着させて取り付けているとともに、樹脂製カバー１６に接触させて取り付けるように点で異なる。このような弾性体製シールリップ３３を配設することにより、複列アンギュラ玉軸受１３の外輪１２と樹脂製カバー１６との取り付け部に形成された微小隙間から水分が侵入してしまうのを有効に抑制することができる。また、本実施の形態では、弾性体製シールリップ３３が外部に露出しないように配置しているため、省スペース化を図ることができるとともに、弾性体製シールリップ３３が早期に損傷してしまうのを抑制することができる。   FIG. 4 is a cross-sectional view showing the vicinity of a seal lip of a rolling bearing device for a vehicle according to a fourth embodiment. Compared to the second embodiment, the rolling bearing device for a vehicle according to the present embodiment has an inclined surface 12 formed on one side (inboard side) in the axial direction of the outer ring 12 of the double row angular ball bearing. A difference is that a space is formed in the attachment portion between the resin cover 16 and the resin cover 16, and the outer ring 12 is arranged with an elastic seal lip 33 in the space. More specifically, the seal lip 33 made of an elastic body is attached by being adhered to the outer ring 12, and is different in that the elastic seal lip 33 is attached by being brought into contact with the resin cover 16. By providing such an elastic seal lip 33, it is effective that moisture enters through a minute gap formed in the mounting portion between the outer ring 12 and the resin cover 16 of the double-row angular ball bearing 13. Can be suppressed. Further, in the present embodiment, since the elastic seal lip 33 is disposed so as not to be exposed to the outside, space can be saved and the elastic seal lip 33 is damaged early. Can be suppressed.

図５は、第５の実施形態に係る車両用転がり軸受装置のシールリップ近傍を示す断面図である。本実施の形態に係る車両用転がり軸受装置は、第４の実施の形態に比べ、樹脂製カバー１６に代えて樹脂成形体部３６ａと金属製芯金部３６ｂとを有する樹脂製カバー３６を用い、複列アンギュラ玉軸受の外輪１２の軸方向一方側（インボード側）に段差部１２ｂを形成して、その段差部１２ｂに弾性体製シールリップ３４を配置するようにした点で異なる。詳細には、外輪１２の段差部１２ｂによって露出した金属製芯金部３６ｂに弾性体製シールリップ３４の一端部３４ａを接着させて取り付けるとともに、この弾性体製シールリップ３４の第１の他端部３４ｂを外輪１２に接触させ、さらに第２の他端部３４ｃを樹脂成形体部３６ａに接触させて取り付けている。このような弾性体製シールリップ３４を配設することにより、複列アンギュラ玉軸受１３と樹脂製カバー３６の金属製芯金部３６ｂとの間に形成された微小隙間から水分が侵入してしまうのを有効に抑制することができるとともに、金属製芯金３６ｂと樹脂成形体部３６ａとの間に形成された微小隙間から水分が侵入してしまうのも有効に抑制することができる。また、本実施の形態では、第４の実施形態と同様に、弾性体製シールリップ３４が外部に露出しないように配置しているため、省スペース化を図ることができるとともに、弾性体製シールリップ３４が早期に損傷してしまうのを抑制することができる。   FIG. 5 is a cross-sectional view showing the vicinity of a seal lip of a rolling bearing device for a vehicle according to a fifth embodiment. The rolling bearing device for a vehicle according to the present embodiment uses a resin cover 36 having a resin molded body portion 36a and a metal cored bar portion 36b instead of the resin cover 16 as compared with the fourth embodiment. The difference is that a stepped portion 12b is formed on one side (inboard side) in the axial direction of the outer ring 12 of the double row angular contact ball bearing, and an elastic seal lip 34 is arranged on the stepped portion 12b. Specifically, one end 34a of the elastic seal lip 34 is attached to the metal core 36b exposed by the step 12b of the outer ring 12, and the first other end of the elastic seal lip 34 is attached. The portion 34b is attached to the outer ring 12, and the second other end 34c is attached to the resin molded body portion 36a. By disposing such an elastic seal lip 34, moisture enters from a minute gap formed between the double-row angular contact ball bearing 13 and the metal core 36b of the resin cover 36. Can be effectively suppressed, and it is also possible to effectively prevent moisture from entering through a minute gap formed between the metal core 36b and the resin molded body 36a. In the present embodiment, similarly to the fourth embodiment, since the elastic seal lip 34 is arranged so as not to be exposed to the outside, space can be saved, and the elastic seal is also provided. It is possible to prevent the lip 34 from being damaged early.

前記第２〜第５の実施形態において、第１の実施形態のように、樹脂製カバー１６、３６の内壁面に金属膜２１を形成するようにしてもよい。これにより、固定輪である外輪１２と樹脂製カバー１６、３６の取り付け部からの水分侵入抑制効果に加えて、樹脂製カバー３６が大気中の水分を透過させてしまうことによる高湿度化を抑制する効果を得ることができ、これらが相俟って、より一層磁気センサ１５の水分による絶縁不良や錆発生を抑制することができる。
また、第２〜第５の実施形態において、樹脂製カバー１６、３６の内壁面に乾燥剤（シリカゲル、活性炭など）を配置（貼着）してもよい。乾燥剤を用いると、密封空間内の湿度をより低くすることができるので、より一層、磁気センサ１５の水分による絶縁不良や錆発生を抑制することができる。 In the second to fifth embodiments, the metal film 21 may be formed on the inner wall surfaces of the resin covers 16 and 36 as in the first embodiment. As a result, in addition to the effect of suppressing moisture intrusion from the fixing portion between the outer ring 12 and the resin covers 16 and 36, the resin cover 36 suppresses high humidity due to permeation of moisture in the atmosphere. These effects can be obtained, and in combination, insulation failure and rust generation due to moisture in the magnetic sensor 15 can be further suppressed.
In the second to fifth embodiments, a desiccant (silica gel, activated carbon, etc.) may be disposed (attached) on the inner wall surfaces of the resin covers 16 and 36. When the desiccant is used, the humidity in the sealed space can be further lowered, and therefore, insulation failure and rust generation due to moisture of the magnetic sensor 15 can be further suppressed.

なお、本発明は上記した各実施形態に制限されるものでなく、適宜の設計変更が可能であるのは勿論である。   Note that the present invention is not limited to the above-described embodiments, and it is needless to say that appropriate design changes are possible.

本発明の第１の実施形態に係る車両用転がり軸受装置を示す断面図である。It is sectional drawing which shows the rolling bearing device for vehicles which concerns on the 1st Embodiment of this invention. 本発明の第２の実施形態に係る車両用転がり軸受装置を示す断面図である。It is sectional drawing which shows the rolling bearing device for vehicles which concerns on the 2nd Embodiment of this invention. 本発明の第３の実施形態に係る車両用転がり軸受装置の弾性体製シールリップ近傍を示す断面図である。It is sectional drawing which shows the elastic-made seal lip vicinity of the rolling bearing device for vehicles which concerns on the 3rd Embodiment of this invention. 本発明の第４の実施形態に係る車両用転がり軸受装置の弾性体製シールリップ近傍を示す断面図である。It is sectional drawing which shows the elastic-made seal lip vicinity of the rolling bearing device for vehicles which concerns on the 4th Embodiment of this invention. 本発明の第５の実施形態に係る車両用転がり軸受装置の弾性体製シールリップ近傍を示す断面図である。It is sectional drawing which shows the seal lip vicinity made from an elastic body of the rolling bearing device for vehicles which concerns on the 5th Embodiment of this invention.

符号の説明Explanation of symbols

１ 第１の内輪部材
２ 第２の内輪部材
３、４ 玉（転動体）
１１ 内輪（回転輪）
１２ 外輪（固定輪）
１３ 複列アンギュラ玉軸受（転がり軸受）
１４ 着磁パルサーリング（着磁体）
１５ 磁気センサ
１６ 樹脂製カバー
２１ 金属膜
３１、３２、３３、３４ 弾性体製シールリップ
Ｈ１ 車両用転がり軸受装置 DESCRIPTION OF SYMBOLS 1 1st inner ring member 2 2nd inner ring member 3, 4 ball (rolling element)
11 Inner ring (Rotating wheel)
12 Outer ring (fixed ring)
13 Double-row angular contact ball bearings (rolling bearings)
14 Magnetized pulsar ring (Magnetic body)
DESCRIPTION OF SYMBOLS 15 Magnetic sensor 16 Resin cover 21 Metal film 31, 32, 33, 34 Elastic body seal lip H1 Rolling bearing apparatus for vehicles

Claims (4)

回転輪である内輪と固定輪である外輪と両輪間に介在される転動体とを有する転がり軸受と、前記回転輪の軸方向一方側に配設される着磁体と、その着磁体に対向して配置される磁気センサと、前記着磁体と磁気センサとの対向部分を密封するために固定輪に取り付けられる樹脂製カバーとを備えた車両用転がり軸受装置であって、
前記樹脂製カバーの内壁面に金属膜を形成したことを特徴とする車両用転がり軸受装置。 A rolling bearing having an inner ring that is a rotating ring, an outer ring that is a fixed ring, and a rolling element that is interposed between the two rings, a magnetized body that is disposed on one side in the axial direction of the rotating ring, and a magnet that faces the magnetized body A rolling bearing device for a vehicle, comprising: a magnetic sensor arranged in a position; and a resin cover attached to a fixed ring to seal a facing portion between the magnetized body and the magnetic sensor,
A rolling bearing device for a vehicle, wherein a metal film is formed on an inner wall surface of the resin cover. 前記金属膜が非磁性材で形成されている請求項１記載の車両用転がり軸受装置。   The rolling bearing device for a vehicle according to claim 1, wherein the metal film is formed of a nonmagnetic material. 回転輪である内輪と固定輪である外輪と両輪間に介在される転動体とを有する転がり軸受と、前記回転輪の軸方向一方側に配設される着磁体と、その着磁体に対向して配置される磁気センサと、前記着磁体と磁気センサとの対向部分を密封するために固定輪に取り付けられる樹脂製カバーとを備えた車両用転がり軸受装置であって、
前記樹脂製カバーと固定輪との取り付け部に弾性体製のシールリップを配設して、前記着磁体と磁気センサとの対向部分を密封するようにしたことを特徴とする車両用転がり軸受装置。 A rolling bearing having an inner ring that is a rotating ring, an outer ring that is a fixed ring, and a rolling element that is interposed between the two rings, a magnetized body that is disposed on one side in the axial direction of the rotating ring, and a magnet that faces the magnetized body A rolling bearing device for a vehicle, comprising: a magnetic sensor arranged in a position; and a resin cover attached to a fixed ring to seal a facing portion between the magnetized body and the magnetic sensor,
A rolling bearing device for a vehicle, wherein a sealing lip made of an elastic body is disposed at an attachment portion between the resin cover and the fixed ring so as to seal a facing portion between the magnetized body and the magnetic sensor. . 前記樹脂製カバーの内壁側に乾燥剤を配置した請求項１〜３のいずれか一項に記載の車両用転がり軸受装置。   The rolling bearing device for a vehicle according to any one of claims 1 to 3, wherein a desiccant is disposed on the inner wall side of the resin cover.
JP2006012628A 2006-01-20 2006-01-20 Rolling bearing device for vehicle Pending JP2007192362A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016156963A1 (en) * 2015-03-31 2016-10-06 Aktiebolaget Skf A cover for a bearing housing and a support assembly for rotating shaft associated

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JP2004354299A (en) * 2003-05-30 2004-12-16 Ntn Corp Bearing device with built-in rotating speed sensor
JP2005029752A (en) * 2003-07-11 2005-02-03 Nsk Ltd Machine parts and rolling bearings made of biodegradable resin composition
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JPH0651227A (en) * 1991-05-01 1994-02-25 Ricoh Co Ltd Fixed structure of rotating body
JPH10319027A (en) * 1997-05-14 1998-12-04 Nippon Seiko Kk Rolling bearing unit with rotation speed detector
JP2004354299A (en) * 2003-05-30 2004-12-16 Ntn Corp Bearing device with built-in rotating speed sensor
JP2005029752A (en) * 2003-07-11 2005-02-03 Nsk Ltd Machine parts and rolling bearings made of biodegradable resin composition
JP2005321375A (en) * 2004-04-09 2005-11-17 Ntn Corp Wheel bearing device with rotation speed detector

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WO2016156963A1 (en) * 2015-03-31 2016-10-06 Aktiebolaget Skf A cover for a bearing housing and a support assembly for rotating shaft associated

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