JP4911354B2 - Current-carrying bearing - Google Patents

Current-carrying bearing Download PDF

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JP4911354B2
JP4911354B2 JP2007129500A JP2007129500A JP4911354B2 JP 4911354 B2 JP4911354 B2 JP 4911354B2 JP 2007129500 A JP2007129500 A JP 2007129500A JP 2007129500 A JP2007129500 A JP 2007129500A JP 4911354 B2 JP4911354 B2 JP 4911354B2
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metal plate
ring
thin wire
inner ring
conductive
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JP2008286229A (en
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正之 村上
寛規 平岡
利彦 白木
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JTEKT Corp
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JTEKT Corp
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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
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7859—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element
    • F16C33/7863—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element mounted to the inner race, e.g. a flinger to use centrifugal effect
    • 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
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/30—Electric properties; Magnetic properties
    • F16C2202/32—Conductivity
    • 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
    • F16C41/002—Conductive elements, e.g. to prevent static electricity

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、通電軸受に関する。   The present invention relates to a current-carrying bearing.

転がり軸受等の軸受には、内輪と外輪との間が電気的に導通されたものがある（例えば、特許文献１参照。）
特開平１１−８２４９２号公報 Some bearings such as a rolling bearing are electrically connected between an inner ring and an outer ring (see, for example, Patent Document 1).
JP-A-11-82492

特許文献１の軸受は、外輪に保持された金属製の太ワイヤの一部が内輪に摺接することにより、内輪と外輪とを電気的に導通している。しかしながら、剛性のある太ワイヤを用いていることにより、太ワイヤの内輪への接触圧が高い。その結果、内輪が高速回転するときには、太ワイヤと内輪とが擦れる音が騒音の原因となる。したがって、高速回転する軸の支持には不適であり、低速回転用の軸受としてしか用いられず、用途が狭い。   In the bearing of Patent Document 1, a part of a thick metal wire held on the outer ring is in sliding contact with the inner ring, thereby electrically connecting the inner ring and the outer ring. However, since the thick thick wire is used, the contact pressure of the thick wire on the inner ring is high. As a result, when the inner ring rotates at a high speed, noise caused by the friction between the thick wire and the inner ring causes noise. Therefore, it is unsuitable for supporting a shaft that rotates at high speed, and is used only as a bearing for low-speed rotation, and its application is narrow.

また、太ワイヤの内輪への接触圧が高いことから、太ワイヤが摩耗し易い。太ワイヤが所定量以上摩耗すると、通電軸受としての製品寿命がきてしまう。
本発明は、かかる背景のもとでなされたもので、広い用途に適用でき、且つ、より長い寿命を実現できる通電軸受を提供することを目的とする。 Further, since the contact pressure of the thick wire to the inner ring is high, the thick wire is easily worn. If the thick wire wears over a predetermined amount, the product life as a current-carrying bearing will end.
The present invention has been made in view of such a background, and an object thereof is to provide an energized bearing that can be applied to a wide range of applications and can achieve a longer life.

上記目的を達成するため、本発明は、第１および第２の軌道輪（２，３）と、第１および第２の軌道輪間を封止する封止部材（５）とを備え、上記封止部材は、第１の軌道輪に導電可能な状態で固定された導電性の金属板（７；７Ａ；７Ｂ；７Ｃ；７Ｄ；７Ｅ）と、金属板の少なくとも一部に積層された保持部材（９；９Ａ；２１；２７；２７Ｄ；３０）と、導電性の細線（８）とを含み、上記導電性の細線は、金属板と保持部材との間に保持された被保持部（１５）と、第２の軌道輪または第２の軌道輪に固定された導電部材（２０）に摺動可能な接触部（１７）とを有し、上記保持部材は、金属板の嵌合部（２８１；２８１Ｄ）に嵌合された止め輪（２７；２７Ｄ）を含むことを特徴とする通電軸受（１）を提供するものである（請求項１）。 In order to achieve the above object, the present invention includes first and second bearing rings (2, 3) and a sealing member (5) for sealing between the first and second bearing rings, The sealing member includes a conductive metal plate (7; 7A; 7B; 7C; 7D; 7E) fixed in a conductive manner to the first race ring, and a holding member laminated on at least a part of the metal plate. A member (9; 9A; 21; 27; 27D; 30) and a conductive thin wire (8), the conductive thin wire being held between the metal plate and the holding member ( 15), slidable contact portion to the second bearing ring or the second bearing ring in a fixed conductive member (20) and (17) possess, the holding member, the fitting portion of the metal plate (281; 281D) in the mated snap ring (27; 27D) is to provide a current bearing (1) which comprises a (claim ).

なお、括弧内の英数字は、後述の実施の形態における対応構成要素等を表す。以下、この項において同じ。
本発明によれば、細線は、第２の軌道輪または第２の軌道輪に固定された導電部材が相対回転したときでも、弾性的に撓みつつ接触を確実に維持することができる。その結果、細線の接圧を低くできるので、細線の摺接音を極めて小さくできる。すなわち、高速回転する軸の支持に本発明の通電軸受を適用したときでも、低騒音を達成できることにより、高速回転する軸の支持に好適であり、この通電軸受の適用範囲を広くできる。さらに、金属板をシールド板として用いることができ、また、金属板をシール部材の芯金として用いることができる。これにより、封止部材をシールド部材として用いることや、シール部材として用いることができ、本発明の通電軸受の用途をより広くできる。また、上記のように細線の接圧を低くできることから、細線の摩耗を可及的に抑制できる。細線の長寿命化を通じて通電軸受の長寿命化を達成できる。 The alphanumeric characters in parentheses indicate corresponding components in the embodiments described later. The same applies hereinafter.
According to the present invention, even when the second track ring or the conductive member fixed to the second track ring is relatively rotated, the fine wire can reliably maintain contact while being elastically bent. As a result, the contact pressure of the fine line can be reduced, and the sliding contact sound of the fine line can be extremely reduced. That is, even when the current-carrying bearing of the present invention is applied to support a shaft that rotates at a high speed, the low noise can be achieved, which is suitable for supporting a shaft that rotates at a high speed. Furthermore, a metal plate can be used as a shield plate, and a metal plate can be used as a core metal of a sealing member. Thereby, a sealing member can be used as a shield member and can be used as a seal member, and the application of the current-carrying bearing of the present invention can be broadened. Moreover, since the contact pressure of the fine wire can be lowered as described above, the wear of the fine wire can be suppressed as much as possible. It is possible to extend the life of energized bearings by extending the life of thin wires.

また、この場合、細線を保持する部材として汎用の止め輪を用いることができる。 Also, if this can be used retaining ring of the general-purpose as a member for holding a thin line.

本発明の好ましい実施の形態を添付図面を参照しつつ説明する。
図１は、本発明の一実施の形態にかかる通電軸受１の概略構成を示す断面図である。図１を参照して、通電軸受１は、例えば、内輪回転型の玉軸受等の転がり軸受であり、内輪２と、外輪３と、内輪２と外輪３との間に介在する玉等の転動体４と、内輪２および外輪３間に区画された内部空間Ｓの両端部に配置される封止部材５，５と、を備えている。 Preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing a schematic configuration of a current-carrying bearing 1 according to an embodiment of the present invention. Referring to FIG. 1, a current-carrying bearing 1 is, for example, a rolling bearing such as an inner ring rotating ball bearing, and the inner ring 2, the outer ring 3, and a ball or the like interposed between the inner ring 2 and the outer ring 3. A moving body 4 and sealing members 5 and 5 disposed at both ends of the internal space S defined between the inner ring 2 and the outer ring 3 are provided.

内輪２および外輪３は、それぞれ、軸受用鋼等の導電性の材料を用いて形成されており、外輪３が第１の軌道輪を構成し、内輪２が第２の軌道輪を構成している。
転動体４は、内部空間Ｓに収容されており、内輪２の周方向に沿って等間隔に複数配置されている。転動体４間の間隔は、保持器６によって維持されている。各転動体４は、内輪２および外輪３のそれぞれと転がり接触している。 The inner ring 2 and the outer ring 3 are each formed using a conductive material such as steel for bearings, the outer ring 3 constitutes the first race ring, and the inner ring 2 constitutes the second race ring. Yes.
The rolling elements 4 are accommodated in the internal space S, and a plurality of rolling elements 4 are arranged at equal intervals along the circumferential direction of the inner ring 2. The spacing between the rolling elements 4 is maintained by a cage 6. Each rolling element 4 is in rolling contact with each of the inner ring 2 and the outer ring 3.

各封止部材５は、内輪２および外輪３間を封止し且つこれら内輪２および外輪３を互いに電気的に短絡するものである。なお、各封止部材５は、互いに対称に配置されていることから、以下では、主に一方の封止部材５に関する構成についてのみ説明する。
封止部材５は、外輪３に固定された金属板としての第１の金属板７と、第１の金属板７から延びる導電性の細線８と、この細線８を保持する保持部材（板部材）としての第２の金属板９と、を含んでいる。 Each sealing member 5 seals between the inner ring 2 and the outer ring 3 and electrically short-circuits the inner ring 2 and the outer ring 3 with each other. In addition, since each sealing member 5 is arrange | positioned mutually symmetrically, below, only the structure regarding the one sealing member 5 is mainly demonstrated.
The sealing member 5 includes a first metal plate 7 as a metal plate fixed to the outer ring 3, conductive thin wires 8 extending from the first metal plate 7, and a holding member (plate member) that holds the thin wires 8. ) As a second metal plate 9.

第１および第２の金属板７，９は、それぞれ、鋼板等の導電性の材料を用いて形成されており、環状をなしている。第１の金属板７および第２の金属板９は、相似形状をなしており、互いの対向面１０，１１を突き合わせて積層されている。これらの互いの対向面１０，１１の少なくとも一部が、スポット溶接や接着剤等によって固定されている。
第１および第２の金属板７，９の外端７１，９１は、それぞれ、カール状に折り曲げられている。外輪３の内周肩部に形成された環状溝１２に、第１の金属板７の外端７１が導電可能に圧入固定されている。 The first and second metal plates 7 and 9 are each formed using a conductive material such as a steel plate and have an annular shape. The first metal plate 7 and the second metal plate 9 have a similar shape, and are laminated such that the opposing surfaces 10 and 11 face each other. At least a part of these mutually facing surfaces 10 and 11 is fixed by spot welding, an adhesive, or the like.
The outer ends 71 and 91 of the first and second metal plates 7 and 9 are respectively bent in a curl shape. An outer end 71 of the first metal plate 7 is press-fitted and fixed in an annular groove 12 formed in the inner peripheral shoulder of the outer ring 3 so as to be conductive.

内輪２の外周肩部１３には、環状溝１４が形成されている。この環状溝１４に、第１および第２の金属板７，９の内端７２，９２がそれぞれ収容されている。第１の金属板７は外端７１と内端７２との間に設けられた環状平板からなる主体部７３を含んでいる。第２の金属板９は、外端９１と内端９２との間に設けられた環状平板からなる主体部９３を含んでいる。   An annular groove 14 is formed in the outer peripheral shoulder 13 of the inner ring 2. Inner ends 72 and 92 of the first and second metal plates 7 and 9 are accommodated in the annular groove 14, respectively. The first metal plate 7 includes a main body 73 formed of an annular flat plate provided between the outer end 71 and the inner end 72. The second metal plate 9 includes a main body 93 made of an annular flat plate provided between the outer end 91 and the inner end 92.

第１および第２の金属板７，９の内端７２，９２には、内輪２の軸方向に平行な中心軸線を有する筒状部４１，４２が設けられている。各筒状部４１，４２は、対応する主体部７３，９３から直交状に延設されている。
図２は、図１の要部の拡大図である。図３は、図２のＩＩＩ−ＩＩＩ線に沿う断面図である。図２および図３を参照して、細線８は、例えば、太さが数μｍ程度の鋼線や銅線等の、可撓性を有する導電性の細線からなり、複数設けられている。本実施の形態において、細線８は、内輪２の周方向に関して１箇所に設けられているが、内輪２の周方向に沿って等間隔に複数設けられていてもよいし、内輪２の周方向の全域に亘って設けられていてもよい。 Cylindrical portions 41 and 42 having central axes parallel to the axial direction of the inner ring 2 are provided at the inner ends 72 and 92 of the first and second metal plates 7 and 9. Each of the cylindrical portions 41 and 42 extends orthogonally from the corresponding main body portions 73 and 93.
FIG. 2 is an enlarged view of a main part of FIG. 3 is a cross-sectional view taken along line III-III in FIG. Referring to FIGS. 2 and 3, the thin wire 8 is made of a conductive thin wire having flexibility, such as a steel wire or a copper wire having a thickness of about several μm, and a plurality of thin wires 8 are provided. In the present embodiment, the thin wire 8 is provided at one place with respect to the circumferential direction of the inner ring 2, but a plurality of fine wires 8 may be provided at equal intervals along the circumferential direction of the inner ring 2, or the circumferential direction of the inner ring 2. It may be provided over the whole area.

図２を参照して、細線８は、被保持部１５と、突出部１６とを含んでいる。被保持部１５は、細線８の一端側の一部に設けられている。この被保持部１５は、第１および第２の金属板７，９の内端７２，９２における対向面１０，１１間に挟持されることにより、すなわち、筒状部４１，４２間に挟持されることにより、第１および第２の金属板７，９間に保持されている。この被保持部１５は、第１の金属板７と導電可能に接触している。   With reference to FIG. 2, the thin wire 8 includes a held portion 15 and a protruding portion 16. The held portion 15 is provided at a part of one end side of the thin wire 8. The held portion 15 is sandwiched between the opposing surfaces 10 and 11 at the inner ends 72 and 92 of the first and second metal plates 7 and 9, that is, sandwiched between the tubular portions 41 and 42. Thus, the first and second metal plates 7 and 9 are held. The held portion 15 is in contact with the first metal plate 7 so as to be conductive.

突出部１６は、第１の金属板７から突出している。突出部１６の先端が、内輪２の環状溝１４の側面１４ａに摺動可能且つ導電可能に接触している。これにより、細線８に接触部１７が形成されている。
上記の構成により、内輪２は、細線８および第１の金属板７を介して、外輪と導電可能となっている。図４に示すように、内輪２が外輪（封止部材５）に対して回転したとき、細線８の突出部１６は、内輪２の環状溝１４の側面１４ａとの摩擦抵抗によって弾性的に撓みつつ、この側面１４ａとの接触状態を維持する。 The protruding portion 16 protrudes from the first metal plate 7. The tip of the protrusion 16 is slidably and conductively in contact with the side surface 14a of the annular groove 14 of the inner ring 2. Thereby, the contact portion 17 is formed on the thin wire 8.
With the above configuration, the inner ring 2 can conduct electricity with the outer ring through the thin wire 8 and the first metal plate 7. As shown in FIG. 4, when the inner ring 2 rotates with respect to the outer ring (sealing member 5), the protruding portion 16 of the thin wire 8 is elastically bent by the frictional resistance with the side surface 14 a of the annular groove 14 of the inner ring 2. However, the contact state with the side surface 14a is maintained.

以上説明したように、本実施の形態によれば、細線８の突出部１６は、内輪２が相対回転したときでも、弾性的に撓みつつこの内輪２との接触を確実に維持することができる。その結果、細線８の接圧を低くできるので、細線８の摺接音を極めて小さくできる。すなわち、高速回転する軸の支持に通電軸受１を適用したときでも、低騒音を達成できることにより、高速回転する軸の支持に好適であり、この通電軸受１の適用範囲を広くできる。   As described above, according to the present embodiment, the protruding portion 16 of the thin wire 8 can be reliably maintained in contact with the inner ring 2 while being elastically bent even when the inner ring 2 is relatively rotated. . As a result, since the contact pressure of the thin wire 8 can be lowered, the sliding sound of the thin wire 8 can be extremely reduced. That is, even when the current-carrying bearing 1 is applied to support a shaft that rotates at high speed, low noise can be achieved, which is suitable for supporting a shaft that rotates at high speed, and the application range of the current-carrying bearing 1 can be widened.

さらに、第１の金属板７をシールド板として用いることができる。これにより、封止部材５をシールド部材として用いることができる。
なお、特許文献１の構成では、通電用の太ワイヤを、外輪とシール部材の弾性体とによって弾性的に挟持していることから、シール部材が必須であり、シールド部材を採用できなかった。 Further, the first metal plate 7 can be used as a shield plate. Thereby, the sealing member 5 can be used as a shield member.
In the configuration of Patent Document 1, since the energizing thick wire is elastically held between the outer ring and the elastic body of the seal member, the seal member is essential, and the shield member cannot be employed.

これに対し、本実施の形態では、２枚の金属板（第１および第２の金属板７，９）で細線８を挟持していることから、弾性体を廃止でき、その結果、シールド部材の機能を実現することが可能となる。シールド機能が求められる軸受として本通電軸受１を適用できることから、通電軸受１の用途をより広くできる。
また、上記のように細線８の接圧を低くできることから、細線８の摩耗を可及的に抑制できる。細線８の長寿命化を通じて通電軸受１の長寿命化を達成できる。 On the other hand, in this embodiment, since the thin wire 8 is sandwiched between the two metal plates (first and second metal plates 7 and 9), the elastic body can be eliminated, and as a result, the shield member Can be realized. Since the current-carrying bearing 1 can be applied as a bearing that requires a shielding function, the application of the current-carrying bearing 1 can be broadened.
Moreover, since the contact pressure of the thin wire 8 can be lowered as described above, the wear of the thin wire 8 can be suppressed as much as possible. It is possible to extend the life of the current-carrying bearing 1 through extending the life of the thin wire 8.

また、第１および第２の金属板７，９同士の積層によって、細線８の被保持部１５を確実に挟み込むことができる。
さらに、２枚の金属板（第１および第２の金属板７，９）を重ね合わせることにより、第１の金属板７を補強することができる。また、封止部材５を用いて内輪２と外輪３とを導電可能にしていることから、グリースとして導電性グリースを用いる必要がない。 Further, the held portion 15 of the thin wire 8 can be reliably sandwiched by the lamination of the first and second metal plates 7 and 9.
Further, the first metal plate 7 can be reinforced by superimposing two metal plates (first and second metal plates 7 and 9). Further, since the inner ring 2 and the outer ring 3 are made conductive using the sealing member 5, there is no need to use conductive grease as the grease.

本発明は、以上の実施の形態の内容に限定されるものではなく、請求項記載の範囲内において種々の変更が可能である。なお、以下では、上記実施の形態と異なる点について主に説明し、同様の構成には同様の符号を付してその説明を省略する。
例えば、図５に示すように、封止部材にシール部材としての機能を持たせてもよい。この場合、第２の金属板９に、ゴム等の環状の弾性体１８が設けられる。弾性体１８のリップ１９は、内輪２の環状溝１４の外周面に摺接される。このように、第２の金属板９を芯金とするシール部材が構成されることとなり、シール部材の機能を実現できる。 The present invention is not limited to the contents of the above-described embodiment, and various modifications can be made within the scope of the claims. In the following, differences from the above embodiment will be mainly described, and the same components will be denoted by the same reference numerals and the description thereof will be omitted.
For example, as shown in FIG. 5, the sealing member may have a function as a sealing member. In this case, an annular elastic body 18 such as rubber is provided on the second metal plate 9. The lip 19 of the elastic body 18 is in sliding contact with the outer peripheral surface of the annular groove 14 of the inner ring 2. Thus, the sealing member having the second metal plate 9 as the core is configured, and the function of the sealing member can be realized.

また、図６に示すように、細線８の突出部１６を、内輪２に固定された導電部材としてのスリンガ２０の一側面に摺動可能に接触させて、接触部１７を形成してもよい。スリンガ２０は、鋼板等を用いて環状に形成されており、内輪２に直接接触することにより、この内輪２と導電可能とされている。
さらに、筒状部４１，４２を廃止してもよい。具体的には、図７に示すように、第１および第２の金属板７Ａ，９Ａの内端７２Ａ，９２Ａが、環状の主体部７３Ａ，９３Ａの内端により構成される。この場合、細線８の突出部１６は、内輪２の環状溝１４の外周面に接触部１７で摺動可能に接触する。 Further, as shown in FIG. 6, the contact portion 17 may be formed by slidably contacting the protruding portion 16 of the thin wire 8 with one side surface of the slinger 20 as a conductive member fixed to the inner ring 2. . The slinger 20 is formed in an annular shape using a steel plate or the like, and can be electrically connected to the inner ring 2 by directly contacting the inner ring 2.
Furthermore, the cylindrical parts 41 and 42 may be eliminated. Specifically, as shown in FIG. 7, the inner ends 72A and 92A of the first and second metal plates 7A and 9A are constituted by the inner ends of the annular main portions 73A and 93A. In this case, the protrusion 16 of the thin wire 8 is slidably contacted with the outer peripheral surface of the annular groove 14 of the inner ring 2 at the contact portion 17.

また、図８に示すように、第１の金属板７Ｂの一部にのみ積層された保持部材としての金属板からなる環状の板部材２１を用いてもよい。
第１の金属板７Ｂの主体部７３の内側面に、板部材２１が圧入固定される環状凹部２２が形成されている。環状凹部２２は、断面溝形形状をなしており、内部空間Ｓの内側を向くように開放されている。環状凹部２２は、径方向に対向する一対の環状の内壁面２５，２６の間に区画されている。 Moreover, as shown in FIG. 8, you may use the cyclic | annular board member 21 which consists of a metal plate as a holding member laminated | stacked only on a part of 1st metal plate 7B.
An annular recess 22 into which the plate member 21 is press-fitted and fixed is formed on the inner surface of the main body 73 of the first metal plate 7B. The annular recess 22 has a groove shape in cross section, and is open so as to face the inner space S. The annular recess 22 is defined between a pair of annular inner wall surfaces 25 and 26 that are opposed in the radial direction.

板部材２１は、内筒２３と、外筒２４と、これらの内筒２３および外筒２４を互いに連結する環状平板からなる主体部３１とを含んでいる。板部材２１の断面形状は、環状凹部２２の断面形状に略合致する形状をなす。
内筒２３は、環状凹部２２の径方向内方の内壁面２５に圧入固定される内周面２３１を含んでいる。外筒２４は、環状凹部２２の径方向外方の内壁面２６に圧入固定される外周面２４１を含んでいる。上記径方向内方の内壁面２５とこれに対向する内筒２３の内周面２３１との間に、細線８の被保持部１５が挟持されている。 The plate member 21 includes an inner cylinder 23, an outer cylinder 24, and a main body portion 31 made of an annular flat plate that connects the inner cylinder 23 and the outer cylinder 24 to each other. The cross-sectional shape of the plate member 21 is a shape that substantially matches the cross-sectional shape of the annular recess 22.
The inner cylinder 23 includes an inner peripheral surface 231 that is press-fitted and fixed to a radially inner wall surface 25 of the annular recess 22. The outer cylinder 24 includes an outer peripheral surface 241 that is press-fitted and fixed to an inner wall surface 26 radially outward of the annular recess 22. The held portion 15 of the thin wire 8 is sandwiched between the radially inner wall surface 25 and the inner peripheral surface 231 of the inner cylinder 23 facing the inner wall surface 25.

なお、環状の板部材２１および環状凹部２２に代えて、第１の金属板７Ｂの主体部７３Ｂの周方向の一部にのみ形成された１または複数の凹部に、これに合致する形状の板部材を嵌め合わせるようにしてもよい。
また、図９に示すように、第１の金属板７Ｃの一部にのみ積層された保持部材（挟持部材）としての止め輪２７を用いてもよい。 Instead of the annular plate member 21 and the annular recess 22, one or a plurality of recesses formed in only a part of the main portion 73 </ b> B in the circumferential direction of the first metal plate 7 </ b> B have a shape matching this. You may make it fit a member.
Further, as shown in FIG. 9, a retaining ring 27 as a holding member (clamping member) laminated only on a part of the first metal plate 7C may be used.

第１の金属板７Ｃの内端７２Ｃには、止め輪２７が保持される環状の保持溝２８が形成されている。保持溝２８は、軸受外部に露呈している。保持溝２８は、第１の金属板７Ｃの一部を窪ませてなり、環状の内壁面２８１と、内壁面２８１に直交する底面２８２とを含んでいる。止め輪２７は、Ｃ型止め輪等の有端環状部材であり、弾性的に縮径および拡径が可能となっている。   An annular holding groove 28 for holding the retaining ring 27 is formed at the inner end 72C of the first metal plate 7C. The holding groove 28 is exposed outside the bearing. The holding groove 28 is formed by recessing a part of the first metal plate 7 </ b> C, and includes an annular inner wall surface 281 and a bottom surface 282 orthogonal to the inner wall surface 281. The retaining ring 27 is an end ring member such as a C-shaped retaining ring, and can be elastically reduced in diameter and expanded.

止め輪２７の外周面２７１が、保持溝２８の嵌合部としての上記内壁面２８１に嵌合されている。保持溝２８内の止め輪２７は、弾性的に縮径されており、保持溝２８の内壁面２８１に対して弾性反発力を生じている。これにより、止め輪２７が保持溝２８に保持されている。
第１の金属板７の保持溝２８の底面２８２と、この底面２８２に相対向する止め輪２７の一側面２７２とによって、細線８の被保持部１５が挟持されている。細線８の突出部１６は、内輪２の環状溝１４の外周面に接触することにより接触部１７を形成している。 An outer peripheral surface 271 of the retaining ring 27 is fitted to the inner wall surface 281 as a fitting portion of the holding groove 28. The retaining ring 27 in the holding groove 28 is elastically reduced in diameter and generates an elastic repulsive force against the inner wall surface 281 of the holding groove 28. Accordingly, the retaining ring 27 is held in the holding groove 28.
The held portion 15 of the thin wire 8 is sandwiched between the bottom surface 282 of the holding groove 28 of the first metal plate 7 and the one side surface 272 of the retaining ring 27 facing the bottom surface 282. The protruding portion 16 of the thin wire 8 forms a contact portion 17 by contacting the outer peripheral surface of the annular groove 14 of the inner ring 2.

この場合、細線８を保持する部材として汎用の止め輪を用いることができる。
なお、図１０に示すように、止め輪２７Ｄが拡径しようとする力Ｆ１を、当該止め輪２７Ｄが細線８を第１の金属板７Ｄ側に押圧する力Ｆ２に変換する変換機構２９を設けてもよい。変換機構２９は、止め輪２７Ｄの外周面２７１Ｄと、保持溝２８Ｄの内壁面２８１Ｄとを含んでいる。これらの外周面２７１Ｄおよび内壁面２８１Ｄは、それぞれ、内輪２の軸方向に関して、細線８側に向かうに従い拡径するテーパ状をなしており、カム面を形成している。これにより、細線８の被保持部１５を挟持する力をより増すことができる。 In this case, a general-purpose retaining ring can be used as a member that holds the thin wire 8.
As shown in FIG. 10, a conversion mechanism 29 is provided for converting the force F1 that the retaining ring 27D tries to expand into the force F2 that the retaining ring 27D presses the thin wire 8 toward the first metal plate 7D. May be. The conversion mechanism 29 includes an outer peripheral surface 271D of the retaining ring 27D and an inner wall surface 281D of the holding groove 28D. Each of the outer peripheral surface 271D and the inner wall surface 281D has a taper shape that increases in diameter toward the fine wire 8 in the axial direction of the inner ring 2, and forms a cam surface. Thereby, the force which clamps the to-be-held part 15 of the thin wire | line 8 can be increased more.

図９に示す実施の形態および図１０に示す実施の形態のそれぞれにおいて、保持溝の内壁面と止め輪の外周面との間に細線８の被保持部１５を挟むことにより、細線８を内輪２の軸方向と平行に延ばしてもよい。
また、図１１に示すように、第１の金属板７Ｅの内端７２Ｅとしての主体部７３Ｅの内端に固定された保持部材３０を用いて細線８の被保持部１５を保持してもよい。保持部材３０は、例えば、接着剤の層または第１の金属板７Ｅの表面に溶接された溶接金属としての導電性のビードを含む。接着剤の層のとき、接着剤には、導電性の材料が含まれており、被保持部１５と第１の金属板７Ｅとが確実に電気的に導通するようになっている。 In each of the embodiment shown in FIG. 9 and the embodiment shown in FIG. 10, the held portion 15 of the thin wire 8 is sandwiched between the inner wall surface of the holding groove and the outer peripheral surface of the retaining ring, whereby the thin wire 8 is connected to the inner ring. You may extend in parallel with 2 axial directions.
Further, as shown in FIG. 11, the held portion 15 of the thin wire 8 may be held using a holding member 30 fixed to the inner end of the main portion 73E as the inner end 72E of the first metal plate 7E. . The holding member 30 includes, for example, a conductive bead as a weld metal welded to the surface of the adhesive layer or the first metal plate 7E. In the case of the adhesive layer, the adhesive contains a conductive material, so that the held portion 15 and the first metal plate 7E are surely electrically connected.

このように、保持部材３０として接着剤の層または溶接金属を用いることにより、第１の金属板７Ｅと細線８との結合力を極めて高くできる。
なお、第１の金属板７Ｅの内端７２Ｅに、主体部７３Ｅに対して直交する中心軸線を有する筒状部または円錐状部を設け、この内端７２Ｅおよび細線８を内輪２の軸方向と平行に延ばしてもよい。その筒状部の内周面または外周面に設けられた保持部材３０によって、細線８の被保持部１５が保持される。被保持部１５は、保持部材３０が設けられた上記筒状部の内周面または外周面に導電可能に接触する。 Thus, by using an adhesive layer or a weld metal as the holding member 30, the bonding force between the first metal plate 7E and the thin wire 8 can be made extremely high.
A cylindrical portion or a conical portion having a central axis perpendicular to the main portion 73E is provided at the inner end 72E of the first metal plate 7E, and the inner end 72E and the thin wire 8 are connected to the axial direction of the inner ring 2. You may extend in parallel. The held portion 15 of the thin wire 8 is held by the holding member 30 provided on the inner peripheral surface or the outer peripheral surface of the cylindrical portion. The held portion 15 contacts the inner peripheral surface or the outer peripheral surface of the cylindrical portion provided with the holding member 30 in a conductive manner.

また、図６に示す実施の形態、図７に示す実施の形態、図８に示す実施の形態、図９に示す実施の形態、図１０に示す実施の形態、および図１１に示す実施の形態のそれぞれにおいて、図５に示す実施の形態と同様に弾性体１８を設けてシール部材を構成してもよい。
さらに、図５に示す実施の形態、図７に示す実施の形態、図８に示す実施の形態、図９に示す実施の形態、図１０に示す実施の形態、および図１１に示す実施の形態のそれぞれにおいて、図６に示す実施の形態と同様にスリンガ２０を設け、このスリンガ２０に細線８を接触させてもよい。 In addition, the embodiment shown in FIG. 6, the embodiment shown in FIG. 7, the embodiment shown in FIG. 8, the embodiment shown in FIG. 9, the embodiment shown in FIG. 10, and the embodiment shown in FIG. In each of the above, a sealing member may be configured by providing an elastic body 18 as in the embodiment shown in FIG.
Furthermore, the embodiment shown in FIG. 5, the embodiment shown in FIG. 7, the embodiment shown in FIG. 8, the embodiment shown in FIG. 9, the embodiment shown in FIG. 10, and the embodiment shown in FIG. 6, a slinger 20 may be provided in the same manner as in the embodiment shown in FIG. 6, and the thin wire 8 may be brought into contact with the slinger 20.

また、各上記実施の形態において、内輪２の外周肩部１３の環状溝１４を廃止した状態で、内輪２の平坦な外周面に細線８を接触させてもよい。
また、内輪２に第１の金属板を固定するとともに、外輪３または外輪３に固定されたスリンガに細線８の突出部１６を接触させてもよい。この場合、外輪回転型の軸受として用いることができる。 Moreover, in each said embodiment, you may make the thin wire | line 8 contact the flat outer peripheral surface of the inner ring | wheel 2 in the state which abolished the annular groove 14 of the outer peripheral shoulder part 13 of the inner ring | wheel 2.
In addition, the first metal plate may be fixed to the inner ring 2, and the protruding portion 16 of the thin wire 8 may be brought into contact with the outer ring 3 or the slinger fixed to the outer ring 3. In this case, it can be used as an outer ring rotating type bearing.

本発明の一実施の形態にかかる通電軸受の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of the electricity supply bearing concerning one embodiment of this invention. 図１の要部の拡大図である。It is an enlarged view of the principal part of FIG. 図２のＩＩＩ−ＩＩＩ線に沿う断面図である。It is sectional drawing which follows the III-III line of FIG. 内輪が回転したときの状態を示す図である。It is a figure which shows a state when an inner ring | wheel rotates. 本発明の別の実施の形態の要部の断面図である。It is sectional drawing of the principal part of another embodiment of this invention. 本発明のさらに別の実施の形態の要部の断面図である。It is sectional drawing of the principal part of another embodiment of this invention. 本発明のさらに別の実施の形態の要部の断面図である。It is sectional drawing of the principal part of another embodiment of this invention. 本発明のさらに別の実施の形態の要部の断面図である。It is sectional drawing of the principal part of another embodiment of this invention. 本発明のさらに別の実施の形態の要部の断面図である。It is sectional drawing of the principal part of another embodiment of this invention. 本発明のさらに別の実施の形態の要部の断面図である。It is sectional drawing of the principal part of another embodiment of this invention. 本発明のさらに別の実施の形態の要部の断面図である。It is sectional drawing of the principal part of another embodiment of this invention.

符号の説明Explanation of symbols

１…導電軸受、２…内輪（第２の軌道輪）、３…外輪（第１の軌道輪）、５…封止部材、７，７Ａ，７Ｂ，７Ｃ，７Ｄ，７Ｅ…第１の金属板（金属板）、８…細線、９，９Ａ…第２の金属板（保持部材、板部材）、１５…被保持部、１７…接触部、２０…スリンガ（第２の軌道輪に固定された導電部材）、２１…板部材（保持部材）、２７，２７Ｄ…止め輪（保持部材）、２８１，２８１Ｄ…（保持溝の）内周面（嵌合部）、３０…保持部材。   DESCRIPTION OF SYMBOLS 1 ... Conductive bearing, 2 ... Inner ring (2nd bearing ring), 3 ... Outer ring (1st bearing ring), 5 ... Sealing member, 7, 7A, 7B, 7C, 7D, 7E ... 1st metal plate (Metal plate), 8 ... fine wire, 9, 9A ... second metal plate (holding member, plate member), 15 ... held portion, 17 ... contact portion, 20 ... slinger (fixed to second track ring) Conductive member), 21... Plate member (holding member), 27, 27D... Retaining ring (holding member), 281, 281D.

Claims (1)

第１および第２の軌道輪と、
第１および第２の軌道輪間を封止する封止部材とを備え、
上記封止部材は、第１の軌道輪に導電可能な状態で固定された導電性の金属板と、金属板の少なくとも一部に積層された保持部材と、導電性の細線とを含み、
上記導電性の細線は、金属板と保持部材との間に保持された被保持部と、第２の軌道輪または第２の軌道輪に固定された導電部材に摺動可能な接触部とを有し、
上記保持部材は、金属板の嵌合部に嵌合された止め輪を含むことを特徴とする通電軸受。 First and second races;
A sealing member that seals between the first and second bearing rings,
The sealing member includes a conductive metal plate fixed in a conductive state to the first race, a holding member laminated on at least a part of the metal plate, and a conductive thin wire,
The conductive thin wire includes a held portion held between the metal plate and the holding member, and a contact portion slidable on the second race ring or the conductive member fixed to the second race ring. Yes, and
The holding member includes a retaining ring fitted to a fitting portion of a metal plate .
JP2007129500A 2007-05-15 2007-05-15 Current-carrying bearing Expired - Fee Related JP4911354B2 (en)

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CN109899399B (en) * 2017-12-08 2021-11-05 现代自动车株式会社 Bearing for driving motor

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