JP2006250169A - Cage for angular ball bearing and its manufacturing method - Google Patents

Cage for angular ball bearing and its manufacturing method Download PDF

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JP2006250169A
JP2006250169A JP2005064053A JP2005064053A JP2006250169A JP 2006250169 A JP2006250169 A JP 2006250169A JP 2005064053 A JP2005064053 A JP 2005064053A JP 2005064053 A JP2005064053 A JP 2005064053A JP 2006250169 A JP2006250169 A JP 2006250169A
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cage
ball bearing
grease
angular
ball
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Tadaki Itabe
忠喜 板部
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Yaskawa Electric Corp
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Yaskawa Electric 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
    • 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

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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 cage for angular ball bearing not susceptible to reduction in grease amount caused by discharge or exclusion of grease to the outside of the bearing or degradation of the grease caused by mixing of abrasion powder therein, and thereby to prevent shortening of bearing life. <P>SOLUTION: In the cage 15 having a pocket hole 7 formed by punching out a steel plate, partition parts 151, 152 are disposed to both ends of the cage 15 at a position near a side face of the bearing, and a guide part 153 is extended vertically in a bearing rotation direction of the pocket hole 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、電動機やスピンドルなどの回転軸支持のためにグリースを封入して使用されるアンギュラ玉軸受の保持器に関する。   The present invention relates to a cage for an angular ball bearing that is used by enclosing grease for supporting a rotating shaft such as an electric motor or a spindle.

従来のアンギュラ玉軸受の保持器には、２つが提案されている。第１の保持器は、打ち抜き保持器方式である（例えば、非特許文献１、２、３参照）。その構造について図５を使って説明する。図５（ａ）は従来のアンギュラ玉軸受の正面断面図、図５（ｂ）は従来のアンギュラ玉軸受の外観図である。
図５において、１はアンギュラ玉軸受、２は外輪、３は内輪、４は玉、３５は打ち抜き保持器、３６はグリース移動経路、７はポケット穴である。
打ち抜き保持器３５は、鋼板をプレス加工することで成形され、アンギュラ玉軸受１の回転方向に沿って複数個の玉４が入るポケット穴７が形成されている。打ち抜き保持器３５は複数個の玉４を保持した状態で、外輪２と内輪３の間に組み込まれ、アンギュラ玉軸受１が組み立てられる。そして、外輪２と内輪３との間には、図示しない潤滑用のグリースが封入される。グリースは矢印で示したグリース移動経路３６に沿って移動する。
アンギュラ玉軸受１の回転時において、打ち抜き保持器３５は、複数個の玉４が回転方向に等間隔に保持されることで、アンギュラ玉軸受１は滑らかに回転する。
また、第２の保持器は、もみ抜き保持器方式である（例えば、非特許文献１，２、４参照）。その構造について図６を用いて説明する。図６（ａ）は従来のアンギュラ玉軸受の正面断面図、図６（ｂ）は従来のアンギュラ玉軸受の外観図である。
図６において、１はアンギュラ玉軸受、２は外輪、３は内輪、４は玉、４５はもみ抜き保持器、４６はグリース移動経路、７はポケット穴である。
もみ抜き保持器４５は、銅合金もしくは合成樹脂を機械加工することで成形され、アンギュラ玉軸受１の回転方向に沿って複数個の玉４が入るポケット穴７を持っている。もみ抜き保持器４５は複数個の玉４を保持した状態で、外輪２と内輪３の間に組みこまれ、アンギュラ玉軸受１が組み立てられる。そして、外輪２と内輪３との間には、図示しない潤滑用のグリースが封入される。グリースは矢印で示したグリース移動経路４６に沿って移動する。
アンギュラ玉軸受１の回転時において、もみ抜き保持器４５は、複数個の玉４が回転方向に等間隔に保持されることで、アンギュラ玉軸受１は滑らかに回転する。
また、図６（ｃ）に示すように、合成樹脂を成形あるいは機械加工することで形成された王冠形保持器が使用される場合もある。
日本精工株式会社 転がり軸受 カタログ（CAT.NO.1101b 1999E-6） B-47ページ、表１ ＮＴＮ株式会社 転がり軸受 総合カタログ（CAT.NO.2202-II/J7） B-41ページ、表２ ＮＴＮ株式会社 転がり軸受 総合カタログ（CAT.NO.2202-II/J7） A-5ページ、表１ 株式会社木村洋行 KAYDON Reali-Slim Ball Bearings Catalog 300-J，24ページ Two conventional angular ball bearing cages have been proposed. The first cage is a punched cage system (see, for example, non-patent documents 1, 2, and 3). The structure will be described with reference to FIG. FIG. 5A is a front sectional view of a conventional angular ball bearing, and FIG. 5B is an external view of the conventional angular ball bearing.
In FIG. 5, 1 is an angular ball bearing, 2 is an outer ring, 3 is an inner ring, 4 is a ball, 35 is a punching cage, 36 is a grease movement path, and 7 is a pocket hole.
The punching cage 35 is formed by pressing a steel plate, and has a pocket hole 7 into which a plurality of balls 4 enter along the rotational direction of the angular ball bearing 1. The punching cage 35 is assembled between the outer ring 2 and the inner ring 3 in a state where a plurality of balls 4 are held, and the angular ball bearing 1 is assembled. Between the outer ring 2 and the inner ring 3, lubricating grease (not shown) is enclosed. The grease moves along a grease movement path 36 indicated by an arrow.
When the angular ball bearing 1 rotates, the punching cage 35 holds the plurality of balls 4 at equal intervals in the rotation direction, so that the angular ball bearing 1 rotates smoothly.
Further, the second cage is a machined cage type (see, for example, Non-Patent Documents 1, 2, and 4). The structure will be described with reference to FIG. FIG. 6A is a front sectional view of a conventional angular ball bearing, and FIG. 6B is an external view of the conventional angular ball bearing.
In FIG. 6, 1 is an angular ball bearing, 2 is an outer ring, 3 is an inner ring, 4 is a ball, 45 is a machined cage, 46 is a grease movement path, and 7 is a pocket hole.
The machined cage 45 is formed by machining a copper alloy or synthetic resin, and has a pocket hole 7 into which a plurality of balls 4 enter along the rotational direction of the angular ball bearing 1. The machined cage 45 is assembled between the outer ring 2 and the inner ring 3 while holding the plurality of balls 4, and the angular ball bearing 1 is assembled. Between the outer ring 2 and the inner ring 3, lubricating grease (not shown) is enclosed. The grease moves along a grease movement path 46 indicated by an arrow.
At the time of rotation of the angular ball bearing 1, the machined ball retainer 45 rotates the angular ball bearing 1 smoothly by holding the plurality of balls 4 at equal intervals in the rotation direction.
Moreover, as shown in FIG.6 (c), the crown-shaped holder | retainer formed by shape | molding or machining a synthetic resin may be used.
NSK Ltd. Rolling Bearing Catalog (CAT.NO.1101b 1999E-6) Page B-47, Table 1 NTN Corporation Rolling Bearing General Catalog (CAT.NO.2202-II / J7) Page B-41, Table 2 NTN Corporation Rolling Bearing General Catalog (CAT.NO.2202-II / J7) Page A-5, Table 1 Hiroyuki Kimura Co., Ltd. KAYDON Reali-Slim Ball Bearings Catalog 300-J, page 24

ところが、従来の打ち抜き保持器を用いたアンギュラ玉軸受では、グリースのほとんどがグリース移動経路に沿って移動するために、アンギュラ玉軸受の外部に排出され易く、アンギュラ玉軸受の内部に残存するグリースの量が減少して軸受寿命が低下するという問題が生じていた。
また、従来の打ち抜き保持器の場合、材料が薄い鋼板製であるために、玉が入るポケット穴において玉との接触面積が小さいために、打ち抜き保持器と玉と間の接触応力が増大し、その結果、打ち抜き保持器と玉との摩耗が大きくなり、摩耗粉の混入によるグリース劣化が進展し、軸受寿命が低下するという問題が生じていた。
次に従来のもみ抜き保持器４５あるいは王冠形保持器を用いたアンギュラ玉軸受１では、グリースのほとんどが矢印で示したグリース移動経路に沿って移動するために、アンギュラ玉軸受の外部に排出され易く、アンギュラ玉軸受の内部に残存するグリースの量が減少して軸受寿命が低下するという問題が生じていた。
また、従来のもみ抜き保持器あるいは王冠形保持器の場合、材料が、鋼板に比較して強度の低い銅合金や合成樹脂が使われることから、保持器の断面積が大きくなり、グリースの排除量が増大し、アンギュラ玉軸受の内部に残存するグリースの量が減少し軸受寿命が低下するという問題が生じていた。
以上で述べたように、従来の保持器を用いたアンギュラ玉軸受では、軸受外部へのグリースの排出や排除によるグリース量の減少や、摩耗粉混入によるグリースの劣化が起こりやすいために、軸受寿命が低下するという問題が生じていた。
そこで、本発明はこのような問題点に鑑みてなされたものであり、アンギュラ玉軸受の保持器において、軸受外部へグリースの排出や排除によるグリース量の減少や、摩耗粉混入によるグリースの劣化が起こりにくくし、軸受寿命が低下しない保持器を提供することを目的とする。 However, in conventional angular contact ball bearings using punched cages, most of the grease moves along the grease movement path, so it is easy to be discharged out of the angular ball bearing, and the grease remaining inside the angular ball bearing There has been a problem that the bearing life is reduced due to a decrease in the amount.
In the case of the conventional punching cage, since the material is made of a thin steel plate, the contact area between the ball and the ball in the pocket hole where the ball enters is small, so the contact stress between the punching cage and the ball increases, As a result, there has been a problem that wear between the punching cage and the ball is increased, grease deterioration due to mixing of wear powder progresses, and the bearing life is reduced.
Next, in the conventional angular ball bearing 1 using the machined cage 45 or the crown-shaped cage, most of the grease moves along the grease movement path indicated by the arrow, so that it is discharged to the outside of the angular ball bearing. It is easy to cause a problem that the amount of grease remaining inside the angular ball bearing is reduced and the life of the bearing is reduced.
In the case of conventional machined cages or crown type cages, the material used is a copper alloy or synthetic resin that has a lower strength compared to steel plates, which increases the cross-sectional area of the cage and eliminates grease. The amount of grease increased, and the amount of grease remaining inside the angular ball bearing decreased, resulting in a problem that the bearing life was shortened.
As described above, with conventional angular contact ball bearings using cages, the amount of grease is reduced due to the discharge and elimination of grease to the outside of the bearing, and the grease is liable to deteriorate due to contamination with wear powder. There has been a problem of lowering.
Therefore, the present invention has been made in view of such problems, and in an angular ball bearing retainer, the amount of grease is reduced by discharging or removing the grease to the outside of the bearing, or the grease is deteriorated by mixing of wear powder. An object of the present invention is to provide a cage that does not easily occur and does not reduce the life of the bearing.

上記目的を解決するため、本発明は、アンギュラ玉軸受用の保持器において、次のように構成した。
請求項１に記載の発明では、電動機やスピンドルなどの回転軸支持のために内輪と外輪に狭持される玉と前記内輪および前記外輪と前記玉の間に封入されるグリースからなるアンギュラ玉軸受の保持器において、前記保持器の両端に形成した仕切部と、ポケット穴の軸受回転方向の前後に形成した案内部とならなるものである。
また、請求項２に記載の発明では、電動機やスピンドルなどの回転軸支持のために内輪と外輪に狭持される玉と前記内輪および前記外輪と前記玉の間に封入されるグリースからなるアンギュラ玉軸受の保持器において、軸受の側面に近い位置の保持器の両端に形成した仕切部と、ポケット穴の中間部に形成した留め部と、前記留め部に取り付けた案内部材からなるものである。
また、請求項３に記載の発明では、前記案内部材が、フッ素樹脂やアクリル樹脂などの自己潤滑樹脂材料、ポリエチレンからなる含油ポリマ、またはスズ青銅系や鉄銅系などの含油金属材料から形成されたものである。
また、請求項４に記載の発明では、電動機やスピンドルなどの回転軸支持のために内輪と外輪に狭持される玉と前記内輪および前記外輪と前記玉の間に封入されるグリースからなるアンギュラ玉軸受の保持器において、円筒形状の鋼板部材を打ち抜いてポケット穴を形成し、ポケット穴の中間部にプレス加工で留め部を形成し、前記留め部に案内部材を取り付けて形成したものである。 In order to solve the above object, the present invention is configured as follows in a cage for an angular ball bearing.
According to the first aspect of the present invention, an angular contact ball bearing comprising a ball held between an inner ring and an outer ring for supporting a rotating shaft such as an electric motor or a spindle, and grease sealed between the inner ring and the outer ring and the ball. In this cage, a partition portion formed at both ends of the cage and a guide portion formed before and after the pocket hole in the bearing rotation direction.
According to a second aspect of the present invention, an angular structure comprising a ball held between an inner ring and an outer ring for supporting a rotating shaft such as an electric motor or a spindle, and grease sealed between the inner ring and the outer ring and the ball. In the ball bearing cage, the ball bearing cage includes a partition portion formed at both ends of the cage at a position close to the side surface of the bearing, a fastening portion formed at an intermediate portion of the pocket hole, and a guide member attached to the fastening portion. .
In the invention according to claim 3, the guide member is formed of a self-lubricating resin material such as a fluororesin or an acrylic resin, an oil-containing polymer made of polyethylene, or an oil-containing metal material such as tin bronze type or iron copper type. It is a thing.
According to a fourth aspect of the present invention, an angular structure comprising a ball that is sandwiched between an inner ring and an outer ring for supporting a rotating shaft such as an electric motor or a spindle, and grease that is sealed between the inner ring and the outer ring and the ball. In a ball bearing retainer, a cylindrical steel plate member is punched to form a pocket hole, a fastening portion is formed by pressing at an intermediate portion of the pocket hole, and a guide member is attached to the fastening portion. .

請求項１から請求項３に記載の発明によると、アンギュラ玉軸受の回転に伴って外輪側に移動するグリースは、仕切部によって遮られて、外部への排出が抑制されるので、軸受の内部に残存するグリースの量は減少しにくくなり、軸受寿命の低下が防止できる。
また、銅合金や合成樹脂より強度の高い鋼板により保持器が形成されることによって、保持器の断面積が小さくでき、グリースの排除量が減少できるために、アンギュラ玉軸受の内部に残存するグリースの量は減少しにくくなり、軸受寿命の低下が防止できる。
さらに、玉と接触するポケット穴の前後に案内部を設ける、または案内部材を取り付けることにより、保持器と玉との接触面積が大きくなることで、保持器と玉との接触応力が低減され、保持器と玉との摩耗が小さくなることから、グリースの劣化により生じる軸受寿命の低下が防止される。
請求項４に記載の発明によると、各部品をプレス加工により形成できるのことから安価なアンギュラ玉軸受を提供できる。 According to the first to third aspects of the present invention, the grease that moves to the outer ring side along with the rotation of the angular ball bearing is blocked by the partition portion, and is prevented from being discharged to the outside. The amount of remaining grease is difficult to decrease, and a reduction in bearing life can be prevented.
In addition, since the cage is formed of a steel plate that is stronger than copper alloy or synthetic resin, the cross-sectional area of the cage can be reduced and the amount of grease removed can be reduced, so that the grease remaining inside the angular ball bearing can be reduced. It is difficult to reduce the amount of the bearing, and it is possible to prevent the bearing life from being reduced.
Furthermore, the contact stress between the cage and the ball is reduced by providing a guide portion before and after the pocket hole in contact with the ball, or by attaching a guide member, thereby increasing the contact area between the cage and the ball, Since the wear between the cage and the balls is reduced, the bearing life is prevented from being reduced due to the deterioration of the grease.
According to the invention described in claim 4, since each part can be formed by pressing, an inexpensive angular ball bearing can be provided.

以下、本発明の実施の形態について図を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の第１実施例の保持器を組み込んだアンギュラ玉軸受の正面断面図、図２は、本発明の第１実施例の保持器を組み込んだアンギュラ玉軸受の側断面図である。
図において、１はアンギュラ玉軸受、２は外輪、３は内輪、４は玉、１５は保持器、１６はグリースの移動経路、７はポケット穴、１５１，１５２は仕切部、１５３は案内部である。
保持器１５は、円筒形状の鋼板部材を打ち抜いて、その円筒面に複数個のポケット穴７が打ち抜かれて形成される。保持器１５の両サイドには、仕切部１５１、１５２が設けられ、ポケット穴７の前後には、案内部１５３が設けられる。
アンギュラ玉軸受１の組立について説明する。はじめに、内輪３の外側に保持器１５を配置した後、保持器１５の複数個のポケット穴７に玉４を入れる。次に、玉４がポケット穴７に入った状態で、外輪２を上方から組み付ける。アンギュラ玉軸受１の使用時には、外輪２と内輪３との間には、図示しない潤滑用のグリースが封入される。
アンギュラ玉軸受１の回転時において、保持器１５は、複数個の玉４を回転方向に等間隔に保持することで、アンギュラ玉軸受１の滑らかな回転が実現される。
従来のアンギュラ玉軸受と異なる部分は、保持器１５の両サイドにグリースの排出を遮断する仕切部１５１、１５２が配設された点である。
以上の構造によって、アンギュラ玉軸受１が回転した際に、グリースは外輪２の外方に押しやられるが、保持器１５の両サイドに存在する仕切部１５１，１５２が、グリースの移動経路を遮断することによって、グリースが軸受外部へ排出することが抑制されるので、軸受内部に残存するグリースの量は減少しにくくなる。また、グリースは仕切部１５１，１５２と玉４の間を経由してポケット穴７の案内部１５３の無い箇所から玉４に戻り、再度、アンギュラ玉軸受１の潤滑剤として使用される。
また、保持器１５の材料として銅合金や合成樹脂より強度の高い鋼板を用いることによって、保持器１５の断面積が小さくなり、グリースの排除量を減少できるために、アンギュラ玉軸受１の内部に残存するグリースの量は減少しにくくなる。
さらに、玉４と接触するポケット穴７の前後に案内部１５３を設けることによって、案内部１５３と玉４との接触面積が大きくなって、案内部１５３と玉４と間の接触応力が減少し、案内部１５３と玉４との間の摩耗が小さくなる。
このように、アンギュラ玉軸受１の内部のグリース残存量は減少しにくくなり、摩耗粉の混入によってグリースが劣化することが抑制されることから、アンギュラ玉軸受の寿命が向上する。 FIG. 1 is a front sectional view of an angular ball bearing incorporating the cage of the first embodiment of the present invention, and FIG. 2 is a side sectional view of the angular ball bearing incorporating the cage of the first embodiment of the present invention. is there.
In the figure, 1 is an angular ball bearing, 2 is an outer ring, 3 is an inner ring, 4 is a ball, 15 is a cage, 16 is a grease movement path, 7 is a pocket hole, 151 and 152 are partition sections, and 153 is a guide section. is there.
The cage 15 is formed by punching a cylindrical steel plate member and punching a plurality of pocket holes 7 in the cylindrical surface. Partition parts 151 and 152 are provided on both sides of the cage 15, and guide parts 153 are provided in front of and behind the pocket hole 7.
The assembly of the angular ball bearing 1 will be described. First, after the cage 15 is disposed outside the inner ring 3, the balls 4 are put into the plurality of pocket holes 7 of the cage 15. Next, the outer ring 2 is assembled from above with the ball 4 in the pocket hole 7. When the angular ball bearing 1 is used, lubricating grease (not shown) is sealed between the outer ring 2 and the inner ring 3.
During the rotation of the angular ball bearing 1, the cage 15 holds the plurality of balls 4 at equal intervals in the rotation direction, thereby realizing a smooth rotation of the angular ball bearing 1.
A difference from the conventional angular ball bearing is that partition portions 151 and 152 for blocking the discharge of grease are arranged on both sides of the cage 15.
With the above structure, when the angular ball bearing 1 rotates, the grease is pushed outward of the outer ring 2, but the partition portions 151 and 152 existing on both sides of the cage 15 block the grease movement path. As a result, the grease is prevented from being discharged to the outside of the bearing, so that the amount of grease remaining inside the bearing is unlikely to decrease. Further, the grease returns to the ball 4 from a portion where the guide portion 153 of the pocket hole 7 does not pass through between the partition portions 151 and 152 and the ball 4, and is used again as a lubricant for the angular ball bearing 1.
Further, by using a steel plate having higher strength than copper alloy or synthetic resin as the material of the cage 15, the sectional area of the cage 15 can be reduced and the amount of grease removed can be reduced. The amount of remaining grease is less likely to decrease.
Furthermore, by providing the guide portion 153 before and after the pocket hole 7 that contacts the ball 4, the contact area between the guide portion 153 and the ball 4 is increased, and the contact stress between the guide portion 153 and the ball 4 is reduced. The wear between the guide portion 153 and the ball 4 is reduced.
Thus, the remaining amount of grease inside the angular ball bearing 1 is less likely to decrease, and the deterioration of the grease due to the mixing of wear powder is suppressed, so the life of the angular ball bearing is improved.

図３は、本発明の第２実施例の保持器を組み込んだアンギュラ玉軸受の正面断面図、図４は、本発明の第２実施例の保持器を組み込んだアンギュラ玉軸受の側断面図である。
図において、１はアンギュラ玉軸受、２は外輪、３は内輪、４は玉、２５は保持器、２６はグリースの移動経路、７はポケット穴、２５１，２５２は仕切部、２５４は留め部、２５５は案内部材である。
保持器２５は、円筒形状の鋼板部材を打ち抜いて、その円筒面に複数個のポケット穴７が打ち抜かれて形成される。保持器２５の両サイドには、仕切部１５１、１５２が設けられる。また、保持器２５のポケット穴７の前後には、留め部２５４が設けられ、そこに案内部材２５５が取り付けられている。
留め部２５４と案内部材２５５の組立方法について説明する。はじめに留め部２５４は保持器の鋼板をＴ字形にプレス加工により形成され、案内部材２５５の両側面に、留め部２５４のＴ字形にかみ合う形状を設けておく。次に、留め部２５４のＴ字形に案内部材２５５の両側面をかみ合わせて組み立てる。
アンギュラ玉軸受１の組立について説明する。はじめに、内輪３の外側に保持器１５を配置した後、保持器１５の複数個のポケット穴７に玉４を入れる。次に、玉４がポケット穴７に入った状態で、外輪２を上方から組み付ける。次に保持器１５は外輪２と内輪３の間に入れられる。アンギュラ玉軸受１の使用時には、外輪２と内輪３との間には、図示しない潤滑用のグリースが封入される。
アンギュラ玉軸受１の回転時において、保持器２５は、複数個の玉４を回転方向に等間隔に保持することで、アンギュラ玉軸受１の滑らかな回転が実現される。
以上の構造によって、アンギュラ玉軸受１が回転した際に、グリースは外輪２の外方に押しやられるが、保持器２５の両サイドに存在する仕切部２５１，２５２が、グリースの移動経路を遮断することによって、グリースが軸受外部へ排出することが抑制されるので、軸受内部に残存するグリースの量は減少しにくくなる。また、グリースは仕切部２５１，２５２と玉４の間を経由してポケット穴７の案内部材２５５の無い箇所から玉４に戻り、再度、アンギュラ玉軸受１の潤滑剤として使用される。
また、保持器２５の材料として銅合金や合成樹脂より強度の高い鋼板を用いることによって、保持器１５の断面積が小さくなり、グリースの排除量を減少できるために、アンギュラ玉軸受１の内部に残存するグリースの量は減少しにくくなる。
更に、玉４と接触するポケット穴７の前後に案内部材２５５を設けることによって、案内部材２５５と玉４との接触面積が大きくなって、案内部材２５５と玉４と間の接触応力が減少し、案内部材２５５と玉４との間の摩耗が小さくなる。
このように、アンギュラ玉軸受１の内部のグリース残存量は減少しにくくなり、摩耗粉の混入によってグリースが劣化することが抑制されることから、アンギュラ玉軸受の寿命が向上する。
ここで、実施例では案内部材２５５の材料を鋼板で説明したが、案内部材２５５をフッ素樹脂やアクリル樹脂などの自己潤滑樹脂材料で形成することによって、案内部材２５５と玉４との摩耗がより低減される。また、案内部材２５５をポリエチレンからなる含油ポリマ、またはスズ青銅系や鉄銅系などの含油金属材料で形成することによって、案内部材２５５と玉４との摩擦や摩耗をより一層低減することができる。
また、本発明による保持器は、銅合金や合成樹脂よりも強度の高い鋼板を用いることで、ポケット穴の間隔を小さくできるので、アンギュラ玉軸受に組み込める玉の数が多くなり、アンギュラ玉軸受の許容荷重を高めることができる。さらに、保持器と玉との接触応力が小さくなる効果も加わるため、固体潤滑のアンギュラ玉軸受にも適用できる。
FIG. 3 is a front sectional view of an angular ball bearing incorporating the cage of the second embodiment of the present invention, and FIG. 4 is a side sectional view of the angular ball bearing incorporating the cage of the second embodiment of the present invention. is there.
In the figure, 1 is an angular ball bearing, 2 is an outer ring, 3 is an inner ring, 4 is a ball, 25 is a cage, 26 is a grease movement path, 7 is a pocket hole, 251 and 252 are partition parts, 254 is a fastening part, Reference numeral 255 denotes a guide member.
The cage 25 is formed by punching a cylindrical steel plate member and punching a plurality of pocket holes 7 in the cylindrical surface. Partitions 151 and 152 are provided on both sides of the cage 25. In addition, before and after the pocket hole 7 of the cage 25, a fastening portion 254 is provided, and a guide member 255 is attached thereto.
A method for assembling the fastening portion 254 and the guide member 255 will be described. First, the fastening portion 254 is formed by pressing the steel plate of the cage into a T shape, and a shape that engages with the T shape of the fastening portion 254 is provided on both side surfaces of the guide member 255. Next, the both sides of the guide member 255 are assembled to the T-shape of the fastening portion 254 and assembled.
The assembly of the angular ball bearing 1 will be described. First, after the cage 15 is disposed outside the inner ring 3, the balls 4 are put into the plurality of pocket holes 7 of the cage 15. Next, the outer ring 2 is assembled from above with the ball 4 in the pocket hole 7. Next, the cage 15 is inserted between the outer ring 2 and the inner ring 3. When the angular ball bearing 1 is used, lubricating grease (not shown) is sealed between the outer ring 2 and the inner ring 3.
During the rotation of the angular ball bearing 1, the cage 25 holds the plurality of balls 4 at equal intervals in the rotation direction, thereby realizing a smooth rotation of the angular ball bearing 1.
With the above structure, when the angular ball bearing 1 rotates, the grease is pushed outward of the outer ring 2, but the partition portions 251 and 252 existing on both sides of the cage 25 block the grease movement path. As a result, the grease is prevented from being discharged to the outside of the bearing, so that the amount of grease remaining inside the bearing is unlikely to decrease. In addition, the grease returns to the ball 4 from a portion where the guide member 255 of the pocket hole 7 is not present via the space between the partition portions 251 and 252 and the ball 4 and is used again as a lubricant for the angular ball bearing 1.
Further, by using a steel plate having a higher strength than copper alloy or synthetic resin as the material of the cage 25, the cross-sectional area of the cage 15 can be reduced, and the amount of grease removed can be reduced. The amount of remaining grease is less likely to decrease.
Furthermore, by providing the guide member 255 before and after the pocket hole 7 in contact with the ball 4, the contact area between the guide member 255 and the ball 4 is increased, and the contact stress between the guide member 255 and the ball 4 is reduced. The wear between the guide member 255 and the ball 4 is reduced.
Thus, the remaining amount of grease inside the angular ball bearing 1 is less likely to decrease, and the deterioration of the grease due to the mixing of wear powder is suppressed, so the life of the angular ball bearing is improved.
Here, in the embodiment, the material of the guide member 255 is described as a steel plate. However, when the guide member 255 is formed of a self-lubricating resin material such as a fluorine resin or an acrylic resin, the guide member 255 and the balls 4 are more worn. Reduced. Further, the friction and wear between the guide member 255 and the balls 4 can be further reduced by forming the guide member 255 from an oil-containing polymer made of polyethylene or an oil-containing metal material such as tin bronze or iron-copper. .
Further, the cage according to the present invention uses a steel plate having higher strength than copper alloy or synthetic resin, so that the interval between the pocket holes can be reduced, so that the number of balls that can be incorporated into the angular ball bearing is increased, and the angular ball bearing The allowable load can be increased. Further, since the effect of reducing the contact stress between the cage and the ball is added, it can also be applied to a solid-lubricated angular ball bearing.

本発明による保持器は、銅合金や合成樹脂よりも強度の高い鋼板を用いることで、ポケット穴の間隔を小さくできるので、アンギュラ玉軸受に組み込める玉の数が多くなり、アンギュラ玉軸受の許容荷重を高めることができる。更に、保持器と玉との接触応力が小さくなる効果も加わるため、固体潤滑のアンギュラ玉軸受にも適用できる。   The cage according to the present invention uses a steel plate that is stronger than copper alloy or synthetic resin, so that the space between the pocket holes can be reduced, so that the number of balls that can be incorporated into the angular ball bearing increases, and the allowable load of the angular ball bearing Can be increased. Furthermore, since the effect of reducing the contact stress between the cage and the ball is added, it can also be applied to a solid lubrication angular contact ball bearing.

本発明の第１実施例の保持器を組み込んだアンギュラ玉軸受の正面断面図である。It is a front sectional view of an angular contact ball bearing incorporating a cage of the 1st example of the present invention. 本発明の第１実施例の保持器を組み込んだアンギュラ玉軸受の側断面図である。It is a sectional side view of the angular contact ball bearing incorporating the retainer of the 1st example of the present invention. 本発明の第２実施例の保持器を組み込んだアンギュラ玉軸受の正面断面図である。It is front sectional drawing of the angular ball bearing incorporating the cage | basket of 2nd Example of this invention. 本発明の第２実施例の保持器を組み込んだアンギュラ玉軸受の側断面図である。It is a sectional side view of the angular ball bearing incorporating the cage of the second embodiment of the present invention. 第１従来例の打ち抜き保持器を組み込んだアンギュラ玉軸受の正面断面図および外観図である。It is front sectional drawing and the external view of the angular ball bearing incorporating the punching cage of the 1st conventional example. 第２従来例のもみ抜き保持器および王冠保持器を組み込んだアンギュラ玉軸受の正面断面図および外観図である。It is a front sectional view and an external view of an angular contact ball bearing incorporating a machined cage and a crown cage of a second conventional example.

符号の説明Explanation of symbols

１ アンギュラ玉軸受
２ 外輪
３ 内輪
４ 玉
１５，２５ 保持器
１６，２６ グリースの移動経路
７ ポケット穴
１５１，１５２ 仕切部
１５３ 案内部
２５１，２５２ 仕切部
２５４ 留め部
２５５ 案内部材
３５ 打ち抜き保持器
３６ グリースの移動経路
４５ もみ抜き保持器
４６ グリースの移動経路 DESCRIPTION OF SYMBOLS 1 Angular contact ball bearing 2 Outer ring 3 Inner ring 4 Balls 15 and 25 Cage 16, 26 Grease movement path 7 Pocket hole 151,152 Partition part 153 Guide part 251,252 Partition part 254 Fastening part 255 Guide member 35 Stamping cage 36 Grease Moving path 45 Machined cage 46 Grease moving path

Claims (4)

電動機やスピンドルなどの回転軸支持のために内輪と外輪に狭持される玉と前記内輪および前記外輪と前記玉の間に封入されるグリースからなるアンギュラ玉軸受の保持器において、
前記保持器の両端に形成した仕切部と、ポケット穴の軸受回転方向の前後に形成した案内部とならなることを特徴とするアンギュラ玉軸受用保持器。 In an angular ball bearing retainer comprising a ball held between an inner ring and an outer ring for supporting a rotating shaft such as an electric motor and a spindle, and grease sealed between the inner ring and the outer ring and the ball,
A cage for an angular ball bearing, characterized in that the cage is formed by partition portions formed at both ends of the cage and guide portions formed before and after the pocket hole in the bearing rotation direction. 電動機やスピンドルなどの回転軸支持のために内輪と外輪に狭持される玉と前記内輪および前記外輪と前記玉の間に封入されるグリースからなるアンギュラ玉軸受の保持器において、
前記保持器の両端に形成した仕切部と、ポケット穴の中間部に形成した留め部と、前記留め部に取り付けた案内部材からなることを特徴とするアンギュラ玉軸受用保持器。 In an angular ball bearing retainer comprising a ball held between an inner ring and an outer ring for supporting a rotating shaft such as an electric motor and a spindle, and grease sealed between the inner ring and the outer ring and the ball,
An angular ball bearing retainer comprising: a partition portion formed at both ends of the retainer; a retaining portion formed at an intermediate portion of a pocket hole; and a guide member attached to the retaining portion. 前記案内部材が、フッ素樹脂やアクリル樹脂などの自己潤滑樹脂材料、ポリエチレンからなる含油ポリマ、またはスズ青銅系や鉄銅系などの含油金属材料から形成されたことを特徴とする請求項２に記載のアンギュラ玉軸受用保持器。   The said guide member was formed from self-lubricating resin materials, such as a fluororesin and an acrylic resin, the oil-containing polymer which consists of polyethylene, or oil-containing metal materials, such as a tin bronze type | system | group and an iron copper type | system | group. Cage for angular contact ball bearings. 電動機やスピンドルなどの回転軸支持のために内輪と外輪に狭持される玉と前記内輪および前記外輪と前記玉の間に封入されるグリースからなるアンギュラ玉軸受の保持器において、
円筒形状の鋼板部材を打ち抜いてポケット穴を形成し、ポケット穴の中間部にプレス加工で留め部を形成し、前記留め部に案内部材を取り付けて形成したことを特徴とするアンギュラ玉軸受用保持器の製造方法。 In an angular ball bearing retainer comprising a ball held between an inner ring and an outer ring for supporting a rotating shaft such as an electric motor and a spindle, and grease sealed between the inner ring and the outer ring and the ball,
A cylindrical ball bearing is formed by punching a cylindrical steel plate member, forming a fastening portion by pressing in an intermediate portion of the pocket hole, and attaching a guide member to the fastening portion. Manufacturing method.
JP2005064053A 2005-03-08 2005-03-08 Cage for angular ball bearing and its manufacturing method Abandoned JP2006250169A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008065943A1 (en) * 2006-11-27 2008-06-05 Osaka Vacuum, Ltd. Retainer of ball bearing
JP2021032358A (en) * 2019-08-26 2021-03-01 日本精工株式会社 Radial roller bearing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008065943A1 (en) * 2006-11-27 2008-06-05 Osaka Vacuum, Ltd. Retainer of ball bearing
JP2008157441A (en) * 2006-11-27 2008-07-10 Osaka Vacuum Ltd Cage for ball bearing
JP4657272B2 (en) * 2006-11-27 2011-03-23 株式会社大阪真空機器製作所 Ball bearing cage
US8449195B2 (en) * 2006-11-27 2013-05-28 Osaka Vacuum, Ltd. Retainer of ball bearing
JP2021032358A (en) * 2019-08-26 2021-03-01 日本精工株式会社 Radial roller bearing

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