JP5612946B2 - Corrugated cage for ball bearings - Google Patents

Corrugated cage for ball bearings Download PDF

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Publication number
JP5612946B2
JP5612946B2 JP2010165866A JP2010165866A JP5612946B2 JP 5612946 B2 JP5612946 B2 JP 5612946B2 JP 2010165866 A JP2010165866 A JP 2010165866A JP 2010165866 A JP2010165866 A JP 2010165866A JP 5612946 B2 JP5612946 B2 JP 5612946B2
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ball
cage
curved
portions
holding
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JP2012026518A (en
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晋一 吉岡
晋一 吉岡
真二 関
真二 関
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NTN Corp
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NTN 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/42—Ball cages made from wire or sheet metal strips
    • F16C33/422—Ball cages made from wire or sheet metal strips made from sheet metal
    • F16C33/427—Ball cages made from wire or sheet metal strips made from sheet metal from two parts, e.g. ribbon cages with two corrugated annular parts
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/20—Land vehicles

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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、グリース潤滑で使用される玉軸受に組み込まれる波形保持器に関する。   The present invention relates to a corrugated cage incorporated in a ball bearing used in grease lubrication.

一般的な深溝玉軸受では、その内外輪間に配した複数の玉を保持する保持器として、鋼板のプレス成形で形成された一対の環状保持片からなる波形保持器を用いることが多い。この波形保持器は、各環状保持片の周方向に複数の湾曲部と湾曲部を連結する連結部とが交互に形成されており、両保持片の湾曲部どうしが対向する状態で連結部どうしを結合して、互いに対向する湾曲部により形成されたポケットで玉を保持するようになっている。そのポケットの内面は、玉の半径とほぼ同じ曲率半径の凹球面状に形成されている。   In a general deep groove ball bearing, a corrugated cage composed of a pair of annular retaining pieces formed by press forming of a steel plate is often used as a cage for holding a plurality of balls arranged between inner and outer rings. In this corrugated cage, a plurality of bending portions and connecting portions that connect the bending portions are alternately formed in the circumferential direction of each annular holding piece, and the connecting portions are connected in a state where the bending portions of both holding pieces face each other. The balls are held in pockets formed by curved portions facing each other. The inner surface of the pocket is formed in a concave spherical shape having a radius of curvature substantially the same as the radius of the ball.

ところで、グリース潤滑で使用される玉軸受に上記のような波形保持器を組み込んでいる場合、軸受内部に充填されたグリースが軸受の回転に伴って徐々に減少していくうえ、保持器のポケットがその内面と玉との間にグリースが入りにくい形状となっているので、使用中に保持器のポケット内面と玉との間の潤滑状態が悪化し、ポケット内面に摩耗や焼き付き、損傷が発生するという問題がある。   By the way, when a corrugated cage as described above is incorporated in a ball bearing used for grease lubrication, the grease filled in the bearing gradually decreases as the bearing rotates, and the cage pocket However, it is difficult for grease to enter between the inner surface and the ball, so the lubrication between the pocket inner surface of the cage and the ball deteriorates during use, causing wear, seizure, and damage to the pocket inner surface. There is a problem of doing.

これに対して、波形保持器の保持片湾曲部の外径側または内径側を径方向とほぼ平行に形成して、潤滑剤がポケット内に入りやすくなるようにすることが提案されている（特許文献１参照。）。   On the other hand, it has been proposed that the outer diameter side or inner diameter side of the holding piece bending portion of the corrugated cage is formed substantially parallel to the radial direction so that the lubricant can easily enter the pocket ( (See Patent Document 1).

特開２００２−２２７８４４号公報（図５（ｂ））JP 2002-227844 A (FIG. 5B)

しかしながら、上記特許文献１に記載された波形保持器では、ポケット内に入ってくるグリースが軸受の回転に伴って減少することには対処できないので、ポケット内面の摩耗や焼き付き、損傷の防止性能は必ずしも満足できるものではない。   However, the corrugated cage described in Patent Document 1 cannot cope with a decrease in the amount of grease entering the pocket as the bearing rotates. It is not always satisfactory.

そこで、本発明は、グリース潤滑で使用される玉軸受に組み込まれる波形保持器の摩耗や焼き付き、損傷の防止性能を向上させることを課題とする。   Therefore, an object of the present invention is to improve the performance of preventing wear, seizure, and damage of a corrugated cage incorporated in a ball bearing used in grease lubrication.

上記の課題を解決するために、本発明は、一対の環状保持片からなり、これらの各保持片は、グリース潤滑で使用される玉軸受の内外輪間に配される複数の玉に沿って湾曲する湾曲部と、これらの湾曲部を連結する連結部とが周方向に交互に形成されており、両保持片の湾曲部どうしが対向する状態で連結部どうしを結合して、互いに対向する湾曲部により形成されたポケットで前記玉を保持するようにした玉軸受用波形保持器において、前記一対の環状保持片の任意の位置で、その内周側と外周側の少なくとも一方には、軸方向に張り出す張出部を設けた構成を採用した。   In order to solve the above problems, the present invention comprises a pair of annular holding pieces, and each holding piece is provided along a plurality of balls arranged between inner and outer rings of a ball bearing used in grease lubrication. The curved portions that are curved and the coupling portions that connect these curved portions are alternately formed in the circumferential direction, and the coupling portions are coupled to each other so that the curved portions of the two holding pieces face each other. In the ball bearing corrugated cage that holds the ball in the pocket formed by the curved portion, at any one of the pair of annular holding pieces, at least one of the inner circumferential side and the outer circumferential side has a shaft A configuration with an overhanging part protruding in the direction was adopted.

すなわち、波形保持器の各保持片の任意の位置に、軸受回転中のグリースの流動を妨げてグリースを残りやすくする軸方向張出部を設けることにより、軸受の回転に伴うグリースの減少を抑え、ポケット内面と玉との間の潤滑状態が長期間にわたって良好に保たれるようにしたのである。前記各保持片の軸方向張出部が設けられる任意の位置は、それぞれの連結部または湾曲部とすることができる。   In other words, by providing an axial extension at any position of each holding piece of the corrugated cage to prevent grease flow during rotation of the bearing and make it easier for the grease to remain, the reduction in grease due to rotation of the bearing is suppressed. Thus, the lubrication state between the pocket inner surface and the ball is kept good over a long period of time. The arbitrary positions where the axially extending portions of the holding pieces are provided can be the respective connecting portions or bending portions.

ここで、前記張出部を各保持片の連結部に設ける場合は、その連結部の張出部を、互いに対向するものどうしでＶ字溝を形成するように軸方向に対して傾斜させることにより、軸受の回転に伴うグリースの減少をより効果的に抑えることができる。   Here, when providing the said overhang | projection part in the connection part of each holding piece, it makes the overhang | projection part of the connection part incline with respect to an axial direction so that a V-shaped groove may be formed by what mutually opposes. As a result, it is possible to more effectively suppress the decrease in grease accompanying the rotation of the bearing.

一方、前記張出部を各保持片の湾曲部に設ける場合は、その湾曲部の内周縁を軸心に近づくにつれて前記玉から離れる方向に湾曲させて、前記張出部を形成することにより、グリースがポケット内面と玉との間に入り込んでいきやすくなり、保持器と玉との潤滑性をさらに向上させることができる。   On the other hand, when the protruding portion is provided in the curved portion of each holding piece, by bending the inner peripheral edge of the curved portion in a direction away from the ball as it approaches the axial center, the protruding portion is formed. It becomes easy for grease to enter between the pocket inner surface and the ball, and the lubricity between the cage and the ball can be further improved.

また、前記各保持片の湾曲部の周方向断面形状をゴシックアーチ形状とすれば、そのゴシックアーチ形状の頂点部分に形成されるポケット内面と玉との隙間にグリースを保持することができ、保持器と玉との潤滑性がさらに向上する。   Moreover, if the circumferential cross-sectional shape of the curved portion of each holding piece is a Gothic arch shape, the grease can be held in the gap between the pocket inner surface and the ball formed at the apex portion of the Gothic arch shape. The lubricity between the vessel and the ball is further improved.

前記保持片としては、金属板のプレス成形で形成されたものを用いることができる。   As the holding piece, one formed by press molding of a metal plate can be used.

また、本発明の玉軸受用波形保持器は、電気自動車モータ用の玉軸受に組み込まれる保持器に対して、特に有効に適用することができる。   The corrugated cage for ball bearings of the present invention can be applied particularly effectively to a cage incorporated in a ball bearing for an electric vehicle motor.

本発明の玉軸受用波形保持器は、上述したように、その環状保持片の連結部または湾曲部に張出部を設けて、この保持器を組み込んだ玉軸受の回転に伴うグリースの減少を抑えるようにしたものであるから、ポケット内面と玉との間の潤滑状態が長期間にわたって良好に保たれ、ポケット内面に摩耗や焼き付き、損傷が生じにくい。従って、この保持器を組み込んだ玉軸受の長寿命化を図ることができる。   As described above, the corrugated cage for a ball bearing according to the present invention is provided with a protruding portion at the connecting portion or the curved portion of the annular retaining piece to reduce the grease as the ball bearing incorporating the cage is rotated. As a result, the lubrication state between the pocket inner surface and the ball is maintained well over a long period of time, and the pocket inner surface is less likely to be worn, seized, or damaged. Therefore, the life of the ball bearing incorporating this cage can be extended.

第１実施形態の保持器を組み込んだ玉軸受の縦断面図（保持片連結部断面）Longitudinal sectional view of a ball bearing incorporating the cage of the first embodiment (cross section of the retaining piece connecting portion) 図１の保持器の正面図Front view of the cage of FIG. 図２の矢印Ａ方向から見た要部の矢視図The arrow view of the principal part seen from the arrow A direction of FIG. 図１の保持片湾曲部の変形例を外周側から見た要部の周方向断面図FIG. 1 is a cross-sectional view in the circumferential direction of a main part when a modified example of the holding piece bending portion of FIG. 第２実施形態の保持器を組み込んだ玉軸受の縦断面図（保持片連結部断面）Longitudinal sectional view of a ball bearing incorporating the cage of the second embodiment (cross section of the retaining piece connecting portion) 第３実施形態の保持器を組み込んだ玉軸受の縦断面図（保持片湾曲部断面）Longitudinal sectional view of a ball bearing incorporating the cage of the third embodiment (cross section of the holding piece curved portion) 第４実施形態の保持器を組み込んだ玉軸受の縦断面図（保持片湾曲部断面）Longitudinal sectional view of a ball bearing incorporating the cage of the fourth embodiment (cross section of the holding piece curved portion)

以下、図面に基づき、本発明の実施形態を説明する。図１は第１実施形態の玉軸受用波形保持器５を組み込んだ深溝玉軸受１を示す。この深溝玉軸受１は、内輪２の軌道溝２ａと外輪３の軌道溝３ａとの間に配される複数の玉４を波形保持器５で保持したもので、電気自動車モータ用としてグリース潤滑で使用される。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a deep groove ball bearing 1 incorporating a corrugated cage 5 for ball bearings according to a first embodiment. This deep groove ball bearing 1 has a plurality of balls 4 arranged between a raceway groove 2a of an inner ring 2 and a raceway groove 3a of an outer ring 3 by a waveform holder 5, and is grease lubricated for an electric vehicle motor. used.

図１乃至図３に示すように、前記波形保持器５は、前記玉４に沿って湾曲する湾曲部６ａと、これらの湾曲部６ａを連結する連結部６ｂとが周方向に交互に形成された一対の環状保持片６、６を、その湾曲部６ａどうしが対向する状態で連結部６ｂどうしをリベット７で結合して、互いに対向する湾曲部６ａ、６ａにより形成されたポケット８で玉４を保持するようにしたものである。そのポケット８の内面は、玉４の半径とほぼ同じ曲率半径の凹球面状に形成されている。   As shown in FIGS. 1 to 3, the waveform holder 5 is formed by alternately forming curved portions 6 a that are curved along the balls 4 and connecting portions 6 b that connect these curved portions 6 a in the circumferential direction. The pair of annular holding pieces 6 and 6 are connected to each other by a rivet 7 in a state in which the curved portions 6a face each other, and the balls 4 in the pockets 8 formed by the curved portions 6a and 6a facing each other. Is to hold. The inner surface of the pocket 8 is formed in a concave spherical shape having the same radius of curvature as the radius of the ball 4.

前記各保持片６は、鋼板のプレス成形で形成されており、その連結部６ｂの内周側に軸方向に張り出す張出部９が設けられている。これらの各張出部９は、互いに対向するものどうしでＶ字溝を形成するように軸方向に対して傾斜しており、この保持器５を組み込んだ玉軸受１の回転中のグリースの流動を妨げてグリースを残りやすくすることができるので、玉軸受１の回転に伴うグリースの減少を効果的に抑えられる。また、各張出部９の周方向端部は湾曲部６ａにも及んでおり、前記Ｖ字溝からポケット８へグリースが流れ込みやすくなっている。なお、各保持片６の素材としては、鋼板以外の金属板を用いることもできる。   Each holding piece 6 is formed by press forming of a steel plate, and an overhanging portion 9 that projects in the axial direction is provided on the inner peripheral side of the connecting portion 6b. These overhanging portions 9 are inclined with respect to the axial direction so as to form a V-shaped groove between the opposing portions, and the grease flows during rotation of the ball bearing 1 incorporating the cage 5. As a result, the grease can easily remain, so that the reduction of the grease accompanying the rotation of the ball bearing 1 can be effectively suppressed. Moreover, the circumferential direction edge part of each overhang | projection part 9 has extended to the curved part 6a, and it becomes easy to flow in into the pocket 8 from the said V-shaped groove. In addition, as a raw material of each holding piece 6, metal plates other than a steel plate can also be used.

この波形保持器５は、上述したように、各保持片６の連結部６ｂに軸方向張出部９を設けて、玉軸受１の回転に伴うグリースの減少が抑えられるようにしたので、ポケット８内面と玉４との間の潤滑状態が長期間にわたって良好に保たれ、摩耗や焼き付き、損傷が生じにくい。   As described above, the corrugated cage 5 is provided with the axial protruding portion 9 in the connecting portion 6b of each holding piece 6 so that the decrease in grease due to the rotation of the ball bearing 1 can be suppressed. 8 The lubrication state between the inner surface and the ball 4 is maintained well over a long period of time, and wear, seizure, and damage are less likely to occur.

図４は、各保持片６の湾曲部６ａの周方向断面形状をゴシックアーチ形状とした変形例を示す。この変形例では、保持片湾曲部６ａのゴシックアーチ形状の頂点部分に形成されるポケット８内面と玉４との隙間にグリースが保持されるので、保持器５と玉４との潤滑性をさらに向上させることができる。   FIG. 4 shows a modification in which the circumferential cross-sectional shape of the curved portion 6a of each holding piece 6 is a Gothic arch shape. In this modification, the grease is held in the gap between the inner surface of the pocket 8 formed at the apex portion of the gothic arch shape of the holding piece bending portion 6a and the ball 4, so that the lubricity between the cage 5 and the ball 4 is further increased. Can be improved.

図５に示す第２の実施形態では、各保持片６の連結部６ｂの外周側に、第１実施形態の内周側の張出部９に代わって軸方向に張り出す張出部１０を設けている。その他の部分の構成、および各保持片６の張出部１０により玉軸受１の回転に伴うグリースの減少を抑えることができる点は、第１実施形態と同じである。なお、各保持片６の張出部１０は軸方向とほぼ平行に延びているが、第１実施形態の張出部９と同様に軸方向に対して傾斜させてもよい。   In the second embodiment shown in FIG. 5, an overhanging portion 10 protruding in the axial direction is provided on the outer peripheral side of the connecting portion 6 b of each holding piece 6 in place of the overhanging portion 9 on the inner peripheral side of the first embodiment. Provided. The configuration of the other parts and the point that the decrease in grease accompanying the rotation of the ball bearing 1 can be suppressed by the overhanging portion 10 of each holding piece 6 are the same as in the first embodiment. In addition, although the overhang | projection part 10 of each holding piece 6 is extended substantially parallel to the axial direction, you may make it incline with respect to an axial direction similarly to the overhang | projection part 9 of 1st Embodiment.

図６に示す第３の実施形態では、第１、第２実施形態の各保持片６の連結部６ｂの張出部９、１０に代えて、各保持片６の湾曲部６ａの外周側に軸方向に張り出す張出部１１を設けている。このようにしても、第１、第２実施形態と同様に、各保持片６の張出部１１で玉軸受１の回転中のグリースの流動を妨げてグリースを残りやすくし、玉軸受１の回転に伴うグリースの減少を抑えることができる。   In 3rd Embodiment shown in FIG. 6, it replaces with the overhang | projection parts 9 and 10 of the connection part 6b of each holding piece 6 of 1st, 2nd embodiment, and the outer peripheral side of the curved part 6a of each holding piece 6 is carried out. An overhang portion 11 is provided to project in the axial direction. Even in this case, as in the first and second embodiments, the overhanging portion 11 of each holding piece 6 prevents the grease from flowing during rotation of the ball bearing 1 so that the grease easily remains. Reduction of grease due to rotation can be suppressed.

図７に示す第４の実施形態では、各保持片６の湾曲部６ａの内周縁を、軸心に近づくにつれて玉４から離れる方向に湾曲させて、第３実施形態の外周側の張出部１１に代わる張出部１２を形成している。また、その張出部１１は、内輪２の外周面との隙間が第１乃至第３の実施形態よりも狭まるように張り出している。これにより、第１乃至第３の実施形態と同様に玉軸受１の回転に伴うグリースの減少を抑えられるだけでなく、グリースがポケット８内面と玉４との間に入り込んでいきやすくなり、保持器５と玉４との潤滑性をさらに向上させることができる。   In the fourth embodiment shown in FIG. 7, the inner peripheral edge of the bending portion 6a of each holding piece 6 is bent in a direction away from the ball 4 as it approaches the axial center, and the overhanging portion on the outer peripheral side of the third embodiment. An overhanging portion 12 is formed instead of 11. Further, the projecting portion 11 projects so that the gap with the outer peripheral surface of the inner ring 2 is narrower than in the first to third embodiments. As a result, in the same way as in the first to third embodiments, not only the reduction of grease due to rotation of the ball bearing 1 can be suppressed, but also the grease can easily enter between the inner surface of the pocket 8 and the ball 4 and be retained. The lubricity between the vessel 5 and the balls 4 can be further improved.

なお、本発明の波形保持器は、上述した各実施形態のようなシール構造のない玉軸受に限らず、ゴムシールやシールド板等を用いたシール構造のある玉軸受にも有効に適用することができる。シール構造のある玉軸受でも、軸受回転中のグリースの減少を完全に防止することはできず、グリース減少の抑制が長寿命化に寄与するからである。   The corrugated cage of the present invention is not limited to a ball bearing without a seal structure as in each of the embodiments described above, but can be effectively applied to a ball bearing with a seal structure using a rubber seal, a shield plate, or the like. it can. This is because even a ball bearing having a seal structure cannot completely prevent a decrease in grease during rotation of the bearing, and the suppression of the decrease in grease contributes to a longer life.

１ 玉軸受
２ 内輪
３ 外輪
４ 玉
５ 波形保持器
６ 保持片
６ａ 湾曲部
６ｂ 連結部
７ リベット
８ ポケット
９、１０、１１、１２ 張出部 DESCRIPTION OF SYMBOLS 1 Ball bearing 2 Inner ring 3 Outer ring 4 Ball 5 Waveform holder 6 Holding piece 6a Curved part 6b Connection part 7 Rivet 8 Pocket 9, 10, 11, 12 Overhang part

Claims (4)

一対の環状保持片からなり、これらの各保持片は、グリース潤滑で使用される玉軸受の内外輪間に配される複数の玉に沿って湾曲する湾曲部と、これらの湾曲部を連結する連結部とが周方向に交互に形成されており、両保持片の湾曲部どうしが対向する状態で連結部どうしを結合して、互いに対向する湾曲部により形成されたポケットで前記玉を保持するようにした玉軸受用波形保持器において、前記一対の環状保持片の連結部および湾曲部の連結部と連続する部位の内周側に、軸方向に張り出す張出部を設け、前記各保持片の張出部を、互いに対向するものどうしでＶ字溝を形成するように軸方向に対して傾斜させたことを特徴とする玉軸受用波形保持器。 It consists of a pair of annular holding pieces, and each of these holding pieces connects these curved portions with curved portions that are curved along a plurality of balls arranged between inner and outer rings of a ball bearing used in grease lubrication. The connecting portions are alternately formed in the circumferential direction, the connecting portions are coupled in a state where the curved portions of the two holding pieces face each other, and the balls are held in the pockets formed by the curved portions facing each other. in such a manner the ball waveform bearing cage, the inner peripheral side of the portion contiguous to the connecting portion of the connecting portion and the curved portion of the pair of annular retaining piece is provided with a projecting portion projecting in the axial direction, each of the holding A corrugated cage for ball bearings characterized in that the projecting portions of the pieces are inclined with respect to the axial direction so as to form V-shaped grooves between those facing each other. 前記各保持片の湾曲部の周方向断面形状をゴシックアーチ形状としたことを特徴とする請求項１に記載の玉軸受用波形保持器。 The corrugated cage for ball bearings according to claim 1, wherein a circumferential cross-sectional shape of the curved portion of each holding piece is a Gothic arch shape. 前記保持片が金属板のプレス成形で形成されたものであることを特徴とする請求項１または２に記載の玉軸受用波形保持器。 The corrugated cage for ball bearings according to claim 1 or 2 , wherein the holding piece is formed by press molding of a metal plate. 電気自動車モータ用の玉軸受に組み込まれることを特徴とする請求項１乃至３のいずれかに記載の玉軸受用波形保持器。 Ball waveform bearing cage according to any one of claims 1 to 3, characterized in that incorporated in the ball bearing for an electric vehicle motor.
JP2010165866A 2010-07-23 2010-07-23 Corrugated cage for ball bearings Expired - Fee Related JP5612946B2 (en)

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JP2010165866A JP5612946B2 (en) 2010-07-23 2010-07-23 Corrugated cage for ball bearings
PCT/JP2011/065850 WO2012011408A1 (en) 2010-07-23 2011-07-12 Wave-shaped retainer for ball bearing

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US5404642A (en) * 1994-01-31 1995-04-11 The Torrington Company Method of assembling a bearing
JP2002130294A (en) * 2000-10-19 2002-05-09 Nsk Ltd Holder for ball bearing
JP4428171B2 (en) * 2004-08-31 2010-03-10 株式会社ジェイテクト Ball bearing
JP2007333022A (en) * 2006-06-13 2007-12-27 Ntn Corp Deep groove ball bearing
JP2008298256A (en) * 2007-06-04 2008-12-11 Nsk Ltd Ball bearing

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