JP2008190564A - Thrust roller bearing - Google Patents

Thrust roller bearing Download PDF

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Publication number
JP2008190564A
JP2008190564A JP2007023151A JP2007023151A JP2008190564A JP 2008190564 A JP2008190564 A JP 2008190564A JP 2007023151 A JP2007023151 A JP 2007023151A JP 2007023151 A JP2007023151 A JP 2007023151A JP 2008190564 A JP2008190564 A JP 2008190564A
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diameter side
outer diameter
cage
roller bearing
side collar
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JP2007023151A
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Kazuyoshi Kurihara
和義 栗原
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JTEKT Corp
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JTEKT Corp
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Priority to JP2007023151A priority Critical patent/JP2008190564A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a thrust roller bearing with a cage, wherein, when a great load works on the outer diameter side ends of pockets with rollers moved with centrifugal force in the direction of the outer diameter, the outer diameter side end faces of the pockets are deformed to give no influence to rotation. <P>SOLUTION: The thrust roller bearing comprises the cage 1 having the plurality of pockets 6 at predetermined peripheral spaces between an outer diameter side collar portion 2a and an inner diameter side collar portion 2b, and the rollers 10 rollingly stored in the pockets 6 of the cage 1. The cage 1 is shaped by forging a steel plate somewhat thinner than the outer diameter of the roller 10 and formed so that the radial width of the outer diameter side collar portion 2a is greater than the radial width of the inner diameter side collar portion 2b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えば自動車のオートマチックトランスミッションやカーエアコンのコンプレッサなどに使用されるスラストころ軸受に関するものである。   The present invention relates to a thrust roller bearing used, for example, in an automatic transmission of a car or a compressor of a car air conditioner.

スラストころ軸受は、例えば図６に示すように、金属板をプレス加工し、あるいは合成樹脂を成型した環状板の中心Ｏから放射状に、かつ周方向に所定の間隔でころを保持するポケット６が設けられた保持器１を有し、ころがポケット６に収容されてポケット６の周方向の端面に設けた複数の抜け止め爪により、転動自在に保持している。そして、例えば、ハウジングと回転軸の間に介装されて軸力を支持する。   For example, as shown in FIG. 6, the thrust roller bearing has pockets 6 for holding rollers at predetermined intervals in the circumferential direction radially from the center O of an annular plate formed by pressing a metal plate or molding a synthetic resin. The retainer 1 is provided, and a roller is accommodated in the pocket 6 and is held by a plurality of retaining claws provided on the end surface in the circumferential direction of the pocket 6 so as to freely roll. For example, it is interposed between the housing and the rotating shaft to support the axial force.

上記のようなスラストころ軸受においては、運転時に回転軸の回転によりころに大きな遠心力が作用し、これによりころが外径方向に移動してポケット６の外径側に当ってこの部分に大きな負荷が作用するため、ポケット６の外径側が変形して回転に影響を与えるという問題があった。これに対処するために、保持器（金属板）の板厚を厚くすることも考えられるが、プレスにより金属板を曲げ加工して整形するためには板厚に制限があるため、ころの遠心力による移動に対して十分対応できなかった。   In the thrust roller bearing as described above, a large centrifugal force acts on the roller due to the rotation of the rotating shaft during operation, whereby the roller moves in the outer diameter direction and hits the outer diameter side of the pocket 6 to be large in this portion. Since the load acts, there is a problem that the outer diameter side of the pocket 6 is deformed and affects the rotation. In order to cope with this, it is conceivable to increase the thickness of the cage (metal plate). However, there is a limit to the plate thickness in order to bend and shape the metal plate with a press. I couldn't cope with the movement by force.

このような問題を解決するために、保持器を冷間鍛造により形成して板厚を厚くし、強度を確保するような発明が提案されている（例えば、特許文献１参照）。   In order to solve such a problem, an invention has been proposed in which the cage is formed by cold forging to increase the plate thickness and ensure the strength (for example, see Patent Document 1).

特開２００６−１７２４５号公報（第４頁、図１−２）JP 2006-17245 A (page 4, FIG. 1-2)

特許文献１に記載されたスラストころ軸受の保持器は、冷間鍛造によって形成されているため、従来の金属板をプレス加工により整形した保持器に比べて、板厚を厚くできるので強度を増すことができるが、外径側鍔部の径方向の幅が、内径側鍔部の径方向の幅より狭く、したがって断面積が小さく形成されているため、矢張り遠心力によるころの外径方向への移動に対して十分対応することができなかった。   Since the cage of the thrust roller bearing described in Patent Document 1 is formed by cold forging, the plate thickness can be increased as compared with a cage in which a conventional metal plate is shaped by press working, thus increasing the strength. However, since the radial width of the outer diameter side flange is narrower than the radial width of the inner diameter side flange, and thus the cross-sectional area is smaller, the outer diameter direction of the roller due to the arrow tension centrifugal force I couldn't respond enough to the move to.

本発明は、上記の課題を解決するためになされたもので、ころが遠心力により外径方向に移動してポケットの外周側端面に大きな負荷が作用しても、ポケットの外周側端面が変形して回転に影響を与えることのない保持器を備えたスラストころ軸受を提供することを目的としたものである。   The present invention has been made to solve the above problems, and even if the roller moves in the outer diameter direction due to centrifugal force and a large load acts on the outer peripheral end surface of the pocket, the outer peripheral end surface of the pocket is deformed. Thus, an object of the present invention is to provide a thrust roller bearing provided with a cage that does not affect the rotation.

本発明は、外径側鍔部と内径側鍔部との間に周方向に所定の間隔で複数のポケットが設けられた保持器と、該保持器のポケット内に転動自在に収容されたころとからなるスラストころ軸受において、前記保持器を、前記ころの外径よりやや薄い鋼板を鍛造により整形し、かつ前記外径側鍔部の径方向の幅を内径側鍔部の径方向の幅より広く形成したものである。   The present invention is a cage in which a plurality of pockets are provided at predetermined intervals in the circumferential direction between the outer diameter side collar and the inner diameter side collar, and the roll is accommodated in the pocket of the cage. In a thrust roller bearing comprising a roller, the cage is formed by forging a steel plate slightly thinner than the outer diameter of the roller, and the radial width of the outer diameter side flange is set to the radial direction of the inner diameter side flange. It is formed wider than the width.

また、上記の保持器を、外径側鍔部と内径側鍔部との間に上下に設けた溝部を介して上下に突出する突部を設け、前記外径側鍔部と内径側鍔部との間にポケットを設けて前記突部のポケット側の上下に抜け止めを設けたものである。   Also, the above-mentioned cage is provided with a protruding portion that protrudes up and down via a groove portion provided vertically between the outer diameter side flange and the inner diameter side flange, and the outer diameter side flange and the inner diameter side flange A pocket is provided between the upper and lower sides of the protrusion and a stopper is provided on the upper and lower sides on the pocket side.

本発明に係るスラストころ軸受は、保持器を鍛造によって製作し、その外径側鍔部の径方向の幅を内径側鍔部の径方向の幅より広く形成して大きな断面積としたので、運転による遠心力によりころが外径方向に移動してポケットの外径側端面に当って大きな負荷が作用しても、外径側端面が変形して回転に影響を与えることがない。   In the thrust roller bearing according to the present invention, the cage is manufactured by forging, and the radial width of the outer diameter side flange is formed wider than the radial width of the inner diameter side flange. Even if the roller moves in the outer diameter direction due to the centrifugal force due to operation and hits the outer diameter side end face of the pocket and a large load is applied, the outer diameter side end face is not deformed to affect the rotation.

図１は本発明の一実施の形態でスラストころ軸受の一種であるスラスト針状ころ軸受の一部を示す上面斜視図、図２は図１の下面斜視図、図３は図１のＡ−Ａ断面図、図４は図１のＢ−Ｂ断面図、図５は図１の保持器の一部斜視図である。
図において、１は保持器で、ころとしての針状ころ１０の外径Ｄよりやや薄い板厚ｔの円環状の鋼板を鍛造により整形したものである。この保持器１は、外径側鍔部２ａと内径側鍔部２ｂの間に上下に対向して溝部３ａ，３ｂが形成され、溝部３ａ，３ｂの間に外径側鍔部２ａと内径側鍔部２ｂと同じ高さで上下に突出した突部４が設けられて、上下対称構造となっている。 FIG. 1 is a top perspective view showing a part of a thrust needle roller bearing which is a type of thrust roller bearing according to an embodiment of the present invention, FIG. 2 is a bottom perspective view of FIG. 1, and FIG. 4 is a cross-sectional view taken along line B-B in FIG. 1, and FIG. 5 is a partial perspective view of the cage in FIG. 1.
In the figure, reference numeral 1 denotes a cage, which is formed by forging an annular steel plate having a thickness t slightly thinner than the outer diameter D of a needle roller 10 as a roller. The cage 1 is formed with groove portions 3a and 3b that are vertically opposed to each other between the outer diameter side flange portion 2a and the inner diameter side flange portion 2b. The outer diameter side flange portion 2a and the inner diameter side are formed between the groove portions 3a and 3b. Protrusions 4 projecting up and down at the same height as the flange 2b are provided to form a vertically symmetrical structure.

そして、溝部３ａの外径側鍔部２ａの付け根部近傍から、溝部３ｂの内径側鍔部２ｂの付け根部近傍にかけて、ころ１０を収容するポケット６が設けられており、このポケット６の径方向の長さはころ１０の軸方向の長さより若干長く、幅はころ１０の外径Ｄとほぼ等しいか又は僅かに大きく形成されている。５ａ，５ｂは突部４の上下において、ポケット６側に設けた抜け止めである。   And the pocket 6 which accommodates the roller 10 is provided from the base part vicinity of the outer diameter side collar part 2a of the groove part 3a to the root part vicinity of the inner diameter side collar part 2b of the groove part 3b, The radial direction of this pocket 6 is provided. Is slightly longer than the length of the roller 10 in the axial direction, and the width is substantially equal to or slightly larger than the outer diameter D of the roller 10. 5a and 5b are stoppers provided on the pocket 6 side above and below the protrusion 4.

また、本発明においては、保持器１の外径側鍔部２ａの径方向の幅Ｗ1を、内径側鍔部２ｂの径方向の幅Ｗ2より大きく、Ｗ1＞Ｗ2に形成し、外径側鍔部２ａの断面積を、内径側鍔部２ｂの断面積より大きく形成してある。 In the present invention, the width W 1 in the radial direction of the outer diameter side flange portion 2a of the cage 1, greater than the width W 2 in the radial direction of the inner diameter side flange portion 2b, formed in W 1> W 2, The cross-sectional area of the outer diameter side flange 2a is formed larger than the cross-sectional area of the inner diameter side flange 2b.

上記のように構成した保持器１においては、ころ１０は抜け止め５ａ，５ｂの間からポケット６内に無理嵌めされ、抜け止め５ａ，５ｂにより抜け出すことなく収容され、転動自在に保持される。
そして、例えば、ハウジングと回転軸との間に介装され、ころ１０の転走面がハウジングと回転軸の軌道面に接触して転動し、回転軸の軸力を受ける。 In the cage 1 configured as described above, the roller 10 is forcibly fitted into the pocket 6 from between the retaining stoppers 5a and 5b, is accommodated without being pulled out by the retaining stoppers 5a and 5b, and is held freely rolling. .
For example, the roller 10 is interposed between the housing and the rotating shaft, the rolling surface of the roller 10 comes into contact with the raceway surface of the housing and the rotating shaft and rolls, and receives the axial force of the rotating shaft.

本発明に係るスラストころ軸受は、運転時に回転軸の回転により、ころ１０が遠心力によって外径方向に移動してポケット６の外径側壁面に当るが、外径側鍔部２ａの鍔部２ａの径方向の幅Ｗ1を広く（断面積を大きく）形成したので、これにより大きな負荷が作用してもポケット６の外径側端面が変形して回転に影響を与えることがない。
なお、上記の説明では、保持器１を上下対称構造に形成した場合を示したが、上下を非対称構造としてもよい。 In the thrust roller bearing according to the present invention, the roller 10 moves in the outer diameter direction by centrifugal force due to the rotation of the rotating shaft during operation and hits the outer diameter side wall surface of the pocket 6, but the collar portion of the outer diameter side flange portion 2a. Since the radial width W 1 of 2a is formed wide (increase in cross-sectional area), the outer diameter side end surface of the pocket 6 is not deformed and does not affect the rotation even when a large load is applied.
In the above description, the case where the cage 1 is formed in a vertically symmetric structure is shown, but the top and bottom may be asymmetrical.

本発明によれば、保持器１を鍛造によって製作したので、保持器１の板厚を厚くして強度を確保することができ、変形や回転不良を防止することができる。
また、保持器１の外径側鍔部２ａの径方向の幅Ｗ1を、内径側鍔部２ｂの径方向の幅Ｗ2より広くして大きな断面積としたので、運転による遠心力によりころ１０が外径方向に移動してポケット６の外径側端面に当って大きな負荷が作用しても、外径側端面が変形して回転に影響を与えることがなく、耐久性を高めることができる。 According to the present invention, since the cage 1 is manufactured by forging, the plate thickness of the cage 1 can be increased to ensure strength, and deformation and rotation failure can be prevented.
Further, the width W 1 in the radial direction of the outer diameter side flange portion 2a of the cage 1, since a large cross-sectional area wider than the width W 2 in the radial direction of the inner diameter side flange portion 2b, the roller by the centrifugal force by the driver Even if 10 is moved in the outer diameter direction and hits the outer diameter side end face of the pocket 6 and a large load is applied, the outer diameter side end face is not deformed to affect the rotation, thereby improving durability. it can.

本発明の一実施の形態に係るスラストころ軸受の一部を示す上面斜視図である。It is an upper surface perspective view which shows a part of thrust roller bearing which concerns on one embodiment of this invention. 図１の下面斜視図である。FIG. 2 is a bottom perspective view of FIG. 1. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図１のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 保持器の一部斜視図である。It is a partial perspective view of a cage. スラストころ軸受の一例の平面図である。It is a top view of an example of a thrust roller bearing.

符号の説明Explanation of symbols

１ 保持器、２ａ 外径側鍔部、２ｂ 内径側鍔部、３ａ，３ｂ 溝部、４ 突部、５ａ，５ｂ 抜け止め、６ ポケット、１０ ころ（針状ころ）。   DESCRIPTION OF SYMBOLS 1 Cage, 2a Outer diameter side collar part, 2b Inner diameter side collar part, 3a, 3b Groove part, 4 protrusion part, 5a, 5b Stopping, 6 pocket, 10 roller (needle roller).

Claims (2)

外径側鍔部と内径側鍔部との間に周方向に所定の間隔で複数のポケットが設けられた保持器と、該保持器のポケット内に転動自在に収容されたころとからなるスラストころ軸受において、
前記保持器を、前記ころの外径よりやや薄い鋼板を鍛造により整形し、かつ前記外径側鍔部の径方向の幅を内径側鍔部の径方向の幅より広く形成したことを特徴とするスラストころ軸受。 It comprises a cage in which a plurality of pockets are provided at predetermined intervals in the circumferential direction between the outer diameter side collar portion and the inner diameter side collar portion, and a roller that is rotatably accommodated in the pocket of the cage. For thrust roller bearings,
The retainer is formed by forging a steel plate that is slightly thinner than the outer diameter of the rollers, and the radial width of the outer diameter side collar is wider than the radial width of the inner diameter collar. Thrust roller bearing. 前記保持器を、外径側鍔部と内径側鍔部との間に上下に設けた溝部を介して上下に突出する突部を設け、前記外径側鍔部と内径側鍔部との間にポケットを設けて前記突部のポケット側の上下に抜け止めを設けたことを特徴とする請求項１記載のスラストころ軸受。   The retainer is provided with a protrusion that protrudes up and down via a groove provided between the outer diameter side collar and the inner diameter side collar, and between the outer diameter side collar and the inner diameter side collar. The thrust roller bearing according to claim 1, wherein a pocket is provided in the upper and lower portions on the pocket side of the protrusion so as to be prevented from coming off.
JP2007023151A 2007-02-01 2007-02-01 Thrust roller bearing Pending JP2008190564A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102691725A (en) * 2012-06-04 2012-09-26 常州光洋轴承股份有限公司 Nylon split retainer for thrust bearing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51129952A (en) * 1975-05-07 1976-11-11 Matsushita Electric Ind Co Ltd High frequency heater
JPS62190811A (en) * 1986-02-18 1987-08-21 松下電器産業株式会社 Voltage nonlinear device
JP2006057742A (en) * 2004-08-20 2006-03-02 Nsk Ltd Retainer for thrust roller bearing and manufacturing method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51129952A (en) * 1975-05-07 1976-11-11 Matsushita Electric Ind Co Ltd High frequency heater
JPS62190811A (en) * 1986-02-18 1987-08-21 松下電器産業株式会社 Voltage nonlinear device
JP2006057742A (en) * 2004-08-20 2006-03-02 Nsk Ltd Retainer for thrust roller bearing and manufacturing method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102691725A (en) * 2012-06-04 2012-09-26 常州光洋轴承股份有限公司 Nylon split retainer for thrust bearing

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