JPH05278406A - Vehicular bearing - Google Patents
Vehicular bearingInfo
- Publication number
- JPH05278406A JPH05278406A JP4105580A JP10558092A JPH05278406A JP H05278406 A JPH05278406 A JP H05278406A JP 4105580 A JP4105580 A JP 4105580A JP 10558092 A JP10558092 A JP 10558092A JP H05278406 A JPH05278406 A JP H05278406A
- Authority
- JP
- Japan
- Prior art keywords
- ring
- conductive
- inner ring
- bearing
- outer ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Sealing Of Bearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は車両用軸受に係り、とく
に、外輪と内輪とを電気的に導通せしめる導電性シール
が少なくとも一方の面に取り付けられたＡＭラジオ付き
自動車の従動輪の軸受として好適な車両用軸受に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing for a vehicle, and more particularly to a bearing for a driven wheel of an automobile with an AM radio, in which a conductive seal for electrically connecting an outer ring and an inner ring is attached to at least one surface. The present invention relates to a suitable vehicle bearing.
【０００２】[0002]
【従来の技術】従来、自動車の従動輪の軸受としては、
図５に示すような車両用軸受５０が使用されている。こ
の図５の軸受５０では、金属製の内輪５１，外輪５２に
溝５１Ａ，５２Ａをそれぞれ設け、これらの溝５１Ａ，
５２Ａの面から成る軌道面を複数の転導体としての金属
製の球５３が転がるようになっている。球５３を円周方
向に一定間隔に保たせるために保持器５４が用いられて
いる。そして、タイヤと地面との摩擦により生じる静電
気の帯電を防止すべく、所定の一方の面（車軸に組みつ
けられた時の外側の面）に環状の導電性シール５５が取
り付けられている。この導電性シールは、外輪５２と内
輪５１との電気的導通を図って帯電しようとする電化を
流し、摩擦により生じる静電気の帯電を防止するもので
ある。そして、このようにして、組み立てられた軸受５
０を二つ一組として、それぞれの外輪５２をブレーキド
ラム（ハウジング）に、それぞれの内輪５１を車軸（ジ
ャーナル）にはめ込むことにより、車体への組みつけが
なされている。2. Description of the Related Art Conventionally, as a bearing for a driven wheel of an automobile,
A vehicle bearing 50 as shown in FIG. 5 is used. In the bearing 50 of FIG. 5, grooves 51A and 52A are provided in a metal inner ring 51 and an outer ring 52, respectively.
A metal ball 53 as a plurality of rolling conductors rolls on the raceway surface formed by the surface 52A. A retainer 54 is used to keep the spheres 53 at constant intervals in the circumferential direction. An annular conductive seal 55 is attached to a predetermined surface (outer surface when assembled to an axle) in order to prevent electrostatic charge generated by friction between the tire and the ground. This conductive seal serves to establish electrical continuity between the outer ring 52 and the inner ring 51 to allow electrification to be carried, and prevent electrostatic charging caused by friction. And the bearing 5 assembled in this way
Assembling to the vehicle body is carried out by fitting two outer races 52 into the brake drum (housing) and fitting each inner race 51 into the axle (journal).
【０００３】ここで、導電性シール５５は、実際には、
図６に示す半径方向の端面図に示されるように、鉄板５
６に導電性のない通常の接着剤５７を塗り、この上から
導電性ゴム５８を被覆して形成されている。図６におい
て、符号５８Ａで示す部分が、軸受５０の内輪５１に接
する部分である。Here, the conductive seal 55 is actually
As shown in the radial end view of FIG.
6 is coated with a normal non-conductive adhesive 57, and a conductive rubber 58 is coated thereon. In FIG. 6, a portion indicated by reference numeral 58A is a portion in contact with the inner ring 51 of the bearing 50.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た従来の車両用軸受５０にあっては、導電性シール５５
を構成する導電性ゴム５８の導電率により導電性シール
５５の導電率が決定されることから、導電性ゴム５８が
内輪５１に接触し、摩擦が起きた場合の耐久性を考慮す
ると、導電率をある値以上に上げることが出来なかっ
た。これは、導電性ゴムの導電率の向上と耐久性の向上
は相反するからである。このため、導電性シール５５を
介しての静電気の移動が十分でなく、帯電が生じ、球５
３の移動により球５３の周囲に溜っていた電荷（静電
気）の放電が起こり、これにより発生する電磁波ノイズ
を満足できるレベルまで低下させることができないとい
う不都合があった。However, in the conventional vehicle bearing 50 described above, the conductive seal 55 is used.
Since the conductivity of the conductive seal 55 is determined by the conductivity of the conductive rubber 58 constituting the, the conductivity is considered in consideration of durability when the conductive rubber 58 contacts the inner ring 51 and friction occurs. Could not be raised above a certain value. This is because the improvement of the conductivity and the improvement of the durability of the conductive rubber conflict with each other. Therefore, the movement of static electricity through the conductive seal 55 is not sufficient, and charging occurs, and the sphere 5
The movement of 3 causes the discharge of the electric charge (static electricity) accumulated around the sphere 53, and the electromagnetic noise generated thereby cannot be reduced to a satisfactory level.
【０００５】[0005]
【発明の目的】本発明は、上記従来技術の有する不都合
に鑑みてなさたものであり、その目的は、静電放電によ
り発生する電磁波ノイズを低減させ得る車両用軸受を提
供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the disadvantages of the prior art described above, and an object of the present invention is to provide a vehicle bearing which can reduce electromagnetic noise generated by electrostatic discharge.
【０００６】[0006]
【課題を解決するための手段】前記目的を達成するた
め、本発明の車両用軸受は、同心円状に且所定間隔を隔
てて配置された内輪及び外輪と、内輪の外周面とこれに
対向する外輪の内周面とに形成された軌道面を転がる複
数の転動体とを備え、内輪と外輪とに同時に接触し当該
両者を電気的に導通せしめるとともにその内縁部が内輪
に沿って摺動可能な環状の導電性シールが少なくとも一
端面側に取り付けられた車両用軸受において、導電性シ
ールは、電気抵抗の非常に小さい環状の金属板の少なく
とも外面と内周縁部と外周縁部に導電性接着剤を介して
導電性ゴムが被覆されて成ることを特徴としている。In order to achieve the above object, a bearing for a vehicle of the present invention is provided with an inner ring and an outer ring which are concentrically arranged at a predetermined distance from each other, and an outer peripheral surface of the inner ring is opposed thereto. Equipped with a plurality of rolling elements that roll on the inner peripheral surface of the outer ring and the raceway surface, contact the inner ring and the outer ring at the same time to electrically connect the two, and the inner edge can slide along the inner ring. In a vehicle bearing in which a simple annular conductive seal is attached to at least one end surface side, the conductive seal is conductively bonded to at least the outer surface, the inner peripheral edge portion, and the outer peripheral edge portion of the annular metal plate having extremely low electric resistance. It is characterized by being coated with a conductive rubber through an agent.
【０００７】[0007]
【作用】上記構成によれば、導電性接着剤の作用によ
り、金属板が導電性ゴムに電気的に接続され、導電性シ
ールによって、金属板の抵抗（これには、導電性接着剤
の抵抗が含まれるが、全体としても抵抗値は非常に小さ
い。）を導電性ゴムの抵抗に並列接続した回路が構成さ
れることになり（図４参照）、当該回路の合成抵抗が導
電性ゴムの抵抗のみの場合の合成抵抗より、その値が小
さくなる。According to the above construction, the metal plate is electrically connected to the conductive rubber by the action of the conductive adhesive, and the resistance of the metal plate (the resistance of the conductive adhesive is , But the resistance value is very small as a whole.) Is connected in parallel with the resistance of the conductive rubber (see FIG. 4), and the combined resistance of the circuit is the conductive rubber. The value is smaller than the combined resistance in the case of only resistance.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図１ないし図４に
基づいて説明する。ここで、前述した従来例と同一もし
くは同等の構成部分については同一の符号を付すものと
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Here, the same reference numerals will be given to the same or equivalent components as those of the conventional example described above.
【０００９】図１には、本発明の一実施例に係る車両用
軸受（以下、「軸受」という。）１，１が二つ一組とし
て組みつけられた車軸１０近傍の概略断面図が示されて
いる。FIG. 1 is a schematic cross-sectional view in the vicinity of an axle 10 in which two vehicle bearings (hereinafter referred to as "bearings") 1 and 1 according to an embodiment of the present invention are assembled in pairs. Has been done.
【００１０】軸受１は、前述した従来例の軸受５０とほ
ぼ同様に構成されている。即ち、軸受１は、同心円状に
且所定間隔を隔てて配置された金属製の内輪５１及び外
輪５２と、これら両者間に介装され、内輪５１の外周
面，外輪５２の内周面にそれぞれ形成された溝５１Ａ，
５２Ａの面から成る軌道面を転がる複数の転導体として
の金属製の球５３と、当該球５３を円周方向に一定間隔
に保持する保持器５４とを備えている。そして、摩擦に
より生じる静電気の帯電を防止すべく、内輪５１と外輪
５２とに同時に接触し当該両者を電気的に導通せしめる
とともにその内周縁部（図３の符号５８Ａ参照）が内輪
５１に沿って摺動可能な環状の導電性シール２が所定の
一端面側（車軸１０に組みつけられた時の外側）に取り
付けられている。このようにして、組み立てられた軸受
１，１が、それぞれの外輪５２がブレーキドラム２０
に、それぞれの内輪５１が車軸１０にはめ込まれ、組み
つけられている。この図において、符号１１はスペーサ
を、符号１２はナットを、符号１３はコッタピンを、符
号１４はキャップを、それぞれ示す。The bearing 1 is constructed in substantially the same manner as the above-mentioned conventional bearing 50. That is, the bearing 1 is provided with a metal inner ring 51 and an outer ring 52, which are concentrically arranged at a predetermined interval, and interposed between them, and is provided on the outer peripheral surface of the inner ring 51 and the inner peripheral surface of the outer ring 52, respectively. Formed groove 51A,
It is provided with a metal ball 53 as a plurality of rolling conductors rolling on the raceway surface formed by the surface 52A, and a cage 54 for holding the ball 53 at a constant interval in the circumferential direction. Then, in order to prevent electrostatic charge generated by friction, the inner ring 51 and the outer ring 52 are simultaneously brought into contact with each other to electrically conduct them, and an inner peripheral edge portion (see reference numeral 58A of FIG. 3) of the inner ring 51 extends along the inner ring 51. A slidable annular conductive seal 2 is attached to a predetermined one end face side (outside when assembled to the axle 10). In the bearings 1 and 1 assembled in this manner, the outer rings 52 of the respective bearings 1 and 1 are arranged on the brake drum 20.
Each inner ring 51 is fitted and assembled to the axle 10. In this figure, reference numeral 11 indicates a spacer, reference numeral 12 indicates a nut, reference numeral 13 indicates a cotter pin, and reference numeral 14 indicates a cap.
【００１１】図２には、図１の矢印Ａ方向からみた一方
の導電性シール２が示され、また、図３には、図２にお
けるＢ−Ｂ線に沿って見た端面図が示されている。図３
において、導電性シール２は、電気抵抗の非常に小さい
環状の金属板としての鉄板５６の外面と内周縁部と外周
縁部に導電性接着剤３を塗り、この上から導電性ゴム５
８を被覆して形成されている。FIG. 2 shows one conductive seal 2 as seen from the direction of arrow A in FIG. 1, and FIG. 3 shows an end view taken along the line BB in FIG. ing. Figure 3
In the above, the conductive seal 2 is coated with the conductive adhesive 3 on the outer surface, the inner peripheral edge portion and the outer peripheral edge portion of the iron plate 56 as an annular metal plate having a very small electric resistance, and the conductive rubber 5 is applied from above.
8 is formed by coating.
【００１２】このため、本実施例では、図４に示すよう
な回路が、導電性シール２により形成される。ここで、
この図における符号５８Ａ，５８Ｂは図３の同一符号で
示す部分に対応する。この図４の回路は、電気抵抗が非
常に小さい鉄板５６の抵抗Ｒ3 （これには、導電性接着
剤３の抵抗も含むまれるが、全体としても抵抗値Ｒ3≪
１である。）が導電性ゴム５８の抵抗Ｒ1 ，Ｒ2 ，Ｒ4
から成る直列回路に、並列接続された回路であり、当該
回路の合成抵抗Ｒは、次式で表わされる。Therefore, in this embodiment, the circuit as shown in FIG. 4 is formed by the conductive seal 2. here,
Reference numerals 58A and 58B in this figure correspond to the portions indicated by the same reference numerals in FIG. In the circuit of FIG. 4, the resistance R 3 of the iron plate 56 having an extremely low electric resistance (including the resistance of the conductive adhesive 3 is included, but the resistance value R 3 <<
It is 1. ) Is the resistance R 1 , R 2 , R 4 of the conductive rubber 58.
Is a circuit that is connected in parallel to a series circuit composed of, and the combined resistance R of the circuit is represented by the following equation.
【００１３】 Ｒ＝Ｒ1 ＋Ｒ2 Ｒ3 ／（Ｒ2 ＋Ｒ3 ）＋Ｒ4 ＝Ｒ1 ＋Ｒ3 ／（１＋Ｒ3 ／Ｒ2 ）＋Ｒ4 ≒Ｒ1 ＋Ｒ3 ＋Ｒ4 …………………R = R 1 + R 2 R 3 / (R 2 + R 3 ) + R 4 = R 1 + R 3 / (1 + R 3 / R 2 ) + R 4 ≈R 1 + R 3 + R 4 ………………
【００１４】この合成抵抗Ｒは、導電性のない通常の接
着剤を使用した従来例に相当する導電性ゴムの抵抗Ｒ
1 ，Ｒ2 ，Ｒ4 から成る直列回路のみの合成抵抗（Ｒ1
＋Ｒ2＋Ｒ4 ）よりその値は相当小さくなる（Ｒ3 ≪Ｒ2
だからである）。This combined resistance R is a resistance R of a conductive rubber corresponding to a conventional example using an ordinary non-conductive adhesive.
The combined resistance of only the series circuit composed of 1 , R 2 and R 4 (R 1
The value is considerably smaller than (+ R 2 + R 4 ) (R 3 << R 2
That is why).
【００１５】従って、本実施例によると、導電性シール
２の導電率が従来より向上し、帯電防止効果を向上せし
めることができ、これにより静電放電による電磁波ノイ
ズを低減することができ、車載用ラジオのＡＭ受信感度
を改善することができるという効果がある。Therefore, according to the present embodiment, the conductivity of the conductive seal 2 is improved as compared with the conventional case, and the antistatic effect can be improved, whereby electromagnetic noise due to electrostatic discharge can be reduced, and the vehicle can be mounted on the vehicle. There is an effect that the AM reception sensitivity of the commercial radio can be improved.
【００１６】[0016]
【発明の効果】以上説明したように、本発明によれば、
導電性シールにより形成される回路の合成抵抗の値が従
来より小さな値となるので、導電性シールの導電率が従
来より向上し、これにより、帯電防止効果を向上させる
ことができ、従って、静電放電による電磁波ノイズを低
減することができ、車載用ラジオのＡＭ受信感度を改善
することができるという従来にない優れた車両用軸受を
提供することができる。As described above, according to the present invention,
Since the value of the combined resistance of the circuit formed by the conductive seal is smaller than the conventional value, the conductivity of the conductive seal is improved as compared with the conventional value, and thus the antistatic effect can be improved, and therefore the static resistance can be improved. It is possible to provide an unprecedented excellent vehicle bearing that can reduce electromagnetic noise due to electric discharge and improve AM reception sensitivity of a vehicle-mounted radio.
【図１】本発明の一実施例の車両用軸受が組み込まれた
車軸近傍を示す概略断面図である。FIG. 1 is a schematic cross-sectional view showing the vicinity of an axle in which a vehicle bearing according to an embodiment of the present invention is incorporated.
【図２】図１の矢印Ａ方向から見た導電性シールを示す
拡大図である。FIG. 2 is an enlarged view showing a conductive seal as seen from the direction of arrow A in FIG.
【図３】図２のＢ−Ｂ線に沿って見た端面図である。FIG. 3 is an end view taken along the line BB of FIG.
【図４】図３の導電性シールにより形成される電気的等
価回路を示す図である。FIG. 4 is a diagram showing an electrical equivalent circuit formed by the conductive seal of FIG.
【図５】従来の車両用軸受の構造を示す一部破断した斜
視図である。FIG. 5 is a partially cutaway perspective view showing a structure of a conventional vehicle bearing.
【図６】図５の車両用軸受に取り付けられた導電性シー
ルの半径方向の端面図である。6 is a radial end view of a conductive seal mounted on the vehicle bearing of FIG.
１ 軸受 ２ 導電性シール ３ 導電性接着剤 ５１ 内輪 ５１Ａ 軌道面を成す溝 ５２ 外輪 ５２Ａ 軌道面を成す溝 ５３ 転動体としての球 ５６ 金属板としての鉄板 ５８ 導電性ゴム 1 Bearing 2 Conductive Seal 3 Conductive Adhesive 51 Inner Ring 51A Groove Forming Raceway 52 Outer Ring 52A Groove Forming Raceway 53 Ball as Rolling Element 56 Iron Plate as Metal Plate 58 Conductive Rubber
Claims (1)
た内輪及び外輪と、前記内輪の外周面とこれに対向する
前記外輪の内周面とに形成された軌道面を転がる複数の
転動体とを備え、前記内輪と外輪とに同時に接触し当該
両者を電気的に導通せしめるとともにその内縁部が前記
内輪に沿って摺動可能な環状の導電性シールが少なくと
も一端面側に取り付けられた車両用軸受において、前記
導電性シールは、電気抵抗の非常に小さい環状の金属板
の少なくとも外面と内周縁部と外周縁部に導電性接着剤
を介して導電性ゴムが被覆されて成ることを特徴とした
車両用軸受。1. An inner ring and an outer ring, which are concentrically arranged at a predetermined interval, and a plurality of rolling surfaces rolling on raceway surfaces formed on an outer peripheral surface of the inner ring and an inner peripheral surface of the outer ring facing the outer peripheral surface. An annular conductive seal having a moving body is attached to at least one end face side of the inner ring and the outer ring simultaneously contacting them to electrically conduct the both and the inner edge of which is slidable along the inner ring. In the bearing for a vehicle, the conductive seal is formed by coating a conductive rubber on at least an outer surface, an inner peripheral edge portion, and an outer peripheral edge portion of an annular metal plate having a very small electric resistance via a conductive adhesive. Characteristic vehicle bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4105580A JPH05278406A (en) | 1992-03-31 | 1992-03-31 | Vehicular bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4105580A JPH05278406A (en) | 1992-03-31 | 1992-03-31 | Vehicular bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05278406A true JPH05278406A (en) | 1993-10-26 |
Family
ID=14411448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4105580A Withdrawn JPH05278406A (en) | 1992-03-31 | 1992-03-31 | Vehicular bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05278406A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007089274A (en) * | 2005-09-20 | 2007-04-05 | Showa Corp | Cover structure for seal cap of motor |
| JP2019151269A (en) * | 2018-03-05 | 2019-09-12 | 本田技研工業株式会社 | Power device |
| WO2023238392A1 (en) * | 2022-06-10 | 2023-12-14 | 株式会社ジェイテクト | Rolling bearing |
-
1992
- 1992-03-31 JP JP4105580A patent/JPH05278406A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007089274A (en) * | 2005-09-20 | 2007-04-05 | Showa Corp | Cover structure for seal cap of motor |
| JP2019151269A (en) * | 2018-03-05 | 2019-09-12 | 本田技研工業株式会社 | Power device |
| CN110228363A (en) * | 2018-03-05 | 2019-09-13 | 本田技研工业株式会社 | Power device |
| US10787194B2 (en) | 2018-03-05 | 2020-09-29 | Honda Motor Co., Ltd. | Power system |
| WO2023238392A1 (en) * | 2022-06-10 | 2023-12-14 | 株式会社ジェイテクト | Rolling bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990608 |