JP4192529B2

JP4192529B2 - Roller cage roller cage and thrust needle roller bearing

Info

Publication number: JP4192529B2
Application number: JP2002246765A
Authority: JP
Inventors: 賢一中岡
Original assignee: JTEKT Corp
Current assignee: JTEKT Corp
Priority date: 2002-08-27
Filing date: 2002-08-27
Publication date: 2008-12-10
Anticipated expiration: 2022-08-27
Also published as: JP2004084797A

Description

【０００１】
【発明の属する技術分野】
本発明は、ころ軸受用ころ保持器およびスラスト針状ころ軸受に関する。
【０００２】
【従来の技術】
一般に、スラスト針状ころ軸受は、アキシャル方向で対向する２枚の平板状軌道輪と、これら両軌道輪の中心から放射状に配置されて両軌道輪間に転動自在に配置される複数個の針状ころと、これら針状ころを円周方向等配位置に保持する保持器とを備える。
【０００３】
図９に示すように、保持器５０は、一枚の金属板から環状に形成されている。またその板面は、プレス加工により断面略Ｍ字形になるよう折曲されている。そして板面の円周方向等配位置に、針状ころ５２を装着するための複数個のポケット５１が、打抜き加工により形成されている。
【０００４】
このように、断面略Ｍ字形部分を打抜いてポケット５１を形成することで、保持器５０の柱部に、保持器５０の厚み方向内外部位で、針状ころ５２を案内するとともにその姿勢を保持する部分が形成されることになる。
【０００５】
そして、保持器５０に形成したＭ字形部分にポケット５１を打抜き加工する際に、ころ止めが、柱部に同時に形成される。
【０００６】
【発明が解決しようとする課題】
上記従来のスラスト針状ころ軸受の保持器５０では、針状ころ５２を案内保持する部分を設けるために、保持器５０におけるポケット５１間の柱部の板面を断面略Ｍ字形に形成している。しかし、長さの短い針状ころ５２を用いる場合は特に、断面略Ｍ字形に形成するような加工は難しくなる。
【０００７】
【課題を解決するための手段】
本発明におけるころ軸受用ころ保持器は、軸心方向に離隔して配置される軌道面間に、転動自在に配置される複数個のころを、円周方向等配位置に保持するためのころ保持器であって、環状かつ平板状の保持器本体の円周方等配部位が開口されることで、前記ころを装着するための複数のポケットが形成され、これら各ポケットの周方向で対向する両側面それぞれに対して、前記ころの周面に接触してころの抜け止めをするころ止め片が、ポケットの側面に沿う方向で３つの領域に分けられ隣り合う領域のもの同士では保持器本体の厚み方向において互いに反対側に向かうように折り曲げられた状態で一体的に形成され、これらころ止め片は、前記ころの転動時にころの一方側半周面上および他方側半周面上に接触し、ころの案内が可能となるよう前記ポケットの両側面に振分けられているとともに、各ころ止め片はポケットの側面に沿う方向での幅が周方向での幅より広幅に形成されている。
【０００８】
上記構成のように、保持器本体を平板状に形成して保持器本体の円周方等配部位にポケットを形成し、ころ止め片をポケットの周方向で対向する両側面に振分けて形成した構成によれば、保持器本体を複雑な形状に加工する必要がないため、その製造が容易になり、かつころ止め片によって、例えば針状ころの外周面が確実に周方向に案内される。
【０００９】
また、前記ころ止め片は、前記保持器本体に打抜き加工により形成される各ポケットに、その周方向で対向する両側面部に一体に形成されるとともに、各ポケットの両側面から保持器本体の厚み方向に向かうよう折曲げて形成されている。
【００１０】
上記構成のように、ころ止め片は、ポケットの打抜き形成時に各ポケットの両側面から保持器本体の厚み方向に向かうよう折曲げるだけで容易に形成され、その傾斜角度も容易に設定可能である。
【００１１】
また、本発明のスラスト針状ころ軸受は、軸心方向に離隔して配置される軌道輪と、これら両軌道輪間に転動自在に配置される複数個の針状ころと、これら針状ころを円周方向等配位置に保持するためのころ保持器とを含むスラスト針状ころ軸受であって、前記保持器は、環状かつ平板状の保持器本体の円周方等配部位が開口されることで、前記針状ころを装着するための複数のポケットが形成され、これら各ポケットの周方向で対向する両側面それぞれに対して、前記針状ころの周面に接触してころの抜け止めをするころ止め片が、ポケットの側面に沿う方向で３つの領域に分けられ隣り合う領域のもの同士では保持器本体の厚み方向において互いに反対側に向かうように折り曲げられた状態で一体的に形成され、これらころ止め片は、前記針状ころの転動時にころの一方側半周面上および他方側半周面上に接触し、ころの案内が可能となるよう前記ポケットの両側面に振分けられているとともに、各ころ止め片はポケットの側面に沿う方向での幅が周方向での幅より広幅に形成されている。
【００１２】
【発明の実施の形態】
以下、本発明の実施形態に係るころ軸受用ころ保持器およびスラスト針状ころ軸受を、図面に基づいて説明する。
【００１３】
図１はスラスト針状ころ軸受の全体構成を示す断面図、図２は図１における拡大半断面図、図３は要部部分拡大断面図、図４は保持器の単体拡大斜視図、図５は要部部分拡大斜視図、図６は保持器本体にポケットを打抜いた状態の部分拡大図である。
【００１４】
図１ないし図３に示すように、本発明の実施形態に係る針状ころ軸受１は、軸心方向に離隔して対向配置される環状の軌道輪（軌道盤）２，３と、これら両軌道輪２，３間に転動自在に配置される複数個の針状ころ４と、これら針状ころ４を円周方向等配位置に保持するための金属製の保持器５とを有する。
【００１５】
両軌道輪２，３の対向面に、それぞれ針状ころ４の軌道面が形成されている。なお、軌道輪２，３は、不図示の回転軸に取付けられる回転輪と、ハウジングに取付けられる固定輪とからなる。
【００１６】
前記保持器５は、環状かつ平板状に形成された保持器本体６と、この保持器本体６の円周方等配部位に開口された複数のころ保持用ポケット（以下単にポケットという）７とを備える。保持器本体６の中心穴の径は、両軌道輪の中心穴の径よりもわずかに大きく形成されている。各ポケット７それぞれに、針状ころ４が装着されている。これら各ポケット７の径方向長さは、針状ころ４の長さに比べてわずかに長く形成されている。
【００１７】
各ポケット７の、周方向で対向する両側面に、針状ころ４の周面に接触して針状ころ４の抜止めをするころ止め片８が一体的に形成されている。これらころ止め片８は、針状ころ４の一方側半周面（例えば下側半周面）９上および他方側半周面（例えば上側半周面）１０上にそれぞれ接触可能となるよう、各ポケット７の両側面に振分けられている。
【００１８】
すなわち、図4ないし図６に示すように、各ポケット７の両側面のうち、針状ころ４の転動方向一方Ａには、その径方向両側部位に、針状ころ４の一方側半周面９上に接触可能な第一ころ止め片１１が、保持器本体６の厚み方向（軸心方向）に沿うように、保持器本体６に対して一体的に折り曲げて形成されている。
【００１９】
これら第一ころ止め片１１の間に、針状ころ４の他方側半周面１０上に接触可能な第二ころ止め片１２が、保持器本体６に対して一体的に折り曲げて形成されている。
【００２０】
また、各ポケット７の両側面のうち、針状ころ４の転動方向他方Ｂには、その径方向両側部位に、針状ころ４の他方側半周面１０上に接触可能な第二ころ止め片１２が、保持器本体６の厚み方向に沿うように、保持器本体６に対して一体的に折り曲げられて形成されている。
【００２１】
これら第二ころ止め片１２の間に、針状ころ４の一方側半周面９上に接触可能な第一ころ止め片１１が、保持器本体６に対して一体的に折り曲げて形成されている。
【００２２】
これら第一ころ止め片１１，第二ころ止め片１２のそれぞれの折り曲げ角度は、例えば、針状ころ４に接した状態で、第一ころ止め片１１，第二ころ止め片１２のころ案内面が針状ころ４の接線方向に沿う角度である。
【００２３】
上記構成において、保持器５は、一枚の金属板から形成されるもので、各ポケット７を、保持器本体６の周方向等配位置、かつ径方向所定位置に打抜くことにより形成される。このとき、各ポケット７の両側面に、第一ころ止め片１１および第二ころ止め片１２の相当部分１１ａ，１２ａを残すように加工する。その後、第一ころ止め片１１および第二ころ止め片１２の相当部分１１ａ，１２ａを、それぞれ所定の傾斜を有するように各ポケット７の両側面から軸心方向に沿う方向に向けて起こす。
【００２４】
そして、各ポケット７に対して針状ころ４を、保持器本体６の厚み方向一方側あるいは他方側から、第一ころ止め片１１あるいは第二ころ止め片１２の弾性に抗して嵌め込む。そして各ポケット７に嵌め込まれた針状ころ４は、第一ころ止め片１１および第二ころ止め片１２によって保持器５から、その厚み方向に脱落するのが防止される。
【００２５】
このように、保持器５に針状ころ４を装着した組品を、内輪および外輪で挟んで使用する。そして、軌道輪のうち内輪が軸心回りに回転すると、内輪の回転方向に応じて針状ころ４の一方側半周面９上に、第一ころ止め片１１が接触し、他方側半周面１０上に第二ころ止め片１２が接触して、針状ころ４を周方向、すなわち転動方向に案内し、針状ころ４は、軌道面を転動する。
【００２６】
そして、長さが比較的短い針状ころ４を使用する場合でも、従来では保持器５の板面は、プレス加工により、保持器本体６の柱部が断面略Ｍ字形になるよう折曲しており、この加工は難しかった。
【００２７】
しかし、本発明の実施形態の場合、第一ころ止め片１１および第二ころ止め片１２の相当部分１１ａ，１２ａを残すように、一枚の平板状金属板に対して、保持器本体６の周方向等配位置、かつ径方向所定位置に打抜くように各ポケット７を形成するものであり、保持器本体６の柱部を断面略Ｍ字形にするような加工は行わない。そして、各ポケット７を形成する際に残した第一ころ止め片１１および第二ころ止め片１２の相当部分１１ａ，１２ａを折り曲げるだけで、第一ころ止め片１１および第二ころ止め片１２を形成することができるので、保持器５の製造を容易に行い得る。
【００２８】
加えて、断面略Ｍ字形になるような難しいプレス加工を省略して、単なる平板状の保持器本体６に打抜き加工により各ポケット７を形成するので、各ポケット７を形成する径方向位置の自由度が増す。
【００２９】
また従来では、保持器５の板面は、プレス加工により柱部の断面が略Ｍ字形になるよう折曲していたため、潤滑剤の流れが径方向で遮られ易く、従って潤滑性能が低下し易かった。これに対し本発明の実施形態によれば、平板状の金属板を打抜いてポケット７を形成し、第一ころ止め片１１および第二ころ止め片１２を折り曲げるだけなので、潤滑剤の流れを遮る部分が少なく、従って針状ころ４のに対する潤滑性が向上する。
【００３０】
本発明はこれに限定されるものではなく、針状ころ４の一方側半周面９上に接触可能な第一ころ止め片１１、針状ころ４の他方側半周面上１０に接触可能な第二ころ止め片１２は、針状ころ４の一方側半周面上９、針状ころ４の他方側半周面１０上に接触可能なようにバランスよく配置されるものであればよい。
【００３１】
図７に示す実施形態では、各ポケット７の、一方の側面の径方向両側部位に、針状ころ４の他方側半周面１０上に接触可能な第二ころ止め片１２を一体的に形成し、これら第二ころ止め片１２の間に、針状ころ４の一方側半周面９上に接触可能な第一ころ止め片１１を一体的に形成した構成とした。
【００３２】
また、各ポケット７の、他方の側面の径方向両側部位に、針状ころ４の他方側半周面１０上に接触可能な第二ころ止め片１２を一体的に形成し、これら第二ころ止め片１２の間に、針状ころ４の一方側半周面９上に接触可能な第一ころ止め片１１を一体的に形成した構成とした。
【００３３】
図８に示す実施形態では、各ポケット７の、一方の側面の径方向両側部位に、針状ころ４の他方側半周面１０上に接触可能な第二ころ止め片１２を一体的に形成し、これら第二ころ止め片１２の間に、針状ころ４の一方側半周面９上に接触可能な第一ころ止め片１１を一体的に形成した構成とした。
【００３４】
また、各ポケット７の他方の側面の径方向両側部位に、針状ころ４の一方側半周面９上に接触可能な第一ころ止め片１１を一体的に形成し、これら第一ころ止め片１１の間に、針状ころ４の他方側半周面１０上に接触可能な第二ころ止め片１２を一体的に形成した構成とした。これら各実施形態においても、上記実施形態と同様の作用効果を奏し得る。
【００３５】
【発明の効果】
以上の説明から明らかな通り、本発明によれば、針状ころの軸方向長さに応じた長さのポケットを有する保持器を安価かつ容易に製造することができる。
【図面の簡単な説明】
【図１】本発明の実施形態を示すスラスト針状ころ軸受の全体構成を示す断面図である。
【図２】同じく図１における拡大半断面図である。
【図３】同じく部分拡大断面図
【図４】同じく保持器の単体拡大斜視図である。
【図５】同じく部分拡大斜視図である。
【図６】同じくポケットを打抜いた状態の部分拡大図である。
【図７】他の実施形態を示す保持器の部分拡大斜視図である。
【図８】さらに他の実施形態を示す保持器の部分拡大斜視図である。
【図９】従来の保持器の拡大判断面図である。
【符号の説明】
１針状ころ軸受
４針状ころ
５保持器
６保持器本体
７ポケット
８ころ止め片
９一方側半周面
１０他方側半周面
１１第一ころ止め片
１２第二ころ止め片[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roller cage for roller bearings and a thrust needle roller bearing.
[0002]
[Prior art]
In general, a thrust needle roller bearing is composed of two flat bearing rings facing each other in the axial direction, and a plurality of thrust bearings that are arranged radially from the center of both the bearing rings and are freely rollable between the both bearing rings. Needle rollers and a cage for holding the needle rollers at circumferentially equidistant positions are provided.
[0003]
As shown in FIG. 9, the retainer 50 is formed in an annular shape from a single metal plate. The plate surface is bent so as to have a substantially M-shaped cross section by press working. A plurality of pockets 51 for mounting the needle rollers 52 are formed by punching at equal circumferential positions on the plate surface.
[0004]
In this way, by punching out the substantially M-shaped section in the cross section to form the pocket 51, the needle roller 52 is guided to the pillar portion of the cage 50 at the inside and outside in the thickness direction of the cage 50 and its posture is changed. A holding portion is formed.
[0005]
When the pocket 51 is punched into the M-shaped portion formed in the cage 50, the roller stopper is formed at the same time on the pillar portion.
[0006]
[Problems to be solved by the invention]
In the cage 50 of the conventional thrust needle roller bearing described above, in order to provide a portion for guiding and holding the needle roller 52, the plate surface of the column portion between the pockets 51 in the cage 50 is formed in a substantially M-shaped cross section. Yes. However, particularly when the needle roller 52 having a short length is used, it is difficult to form the roller so as to have a substantially M-shaped cross section.
[0007]
[Means for Solving the Problems]
A roller cage for roller bearings according to the present invention is for holding a plurality of rollers, which are arranged in a freely rolling manner, at circumferentially equidistant positions between raceway surfaces spaced apart in the axial direction. A roller retainer, wherein a plurality of pockets for mounting the rollers are formed by opening a circumferentially equidistant portion of the annular and flat retainer body, and in the circumferential direction of each of these pockets to the opposing sides of each roller stopper pieces a stopper of the rollers in contact with the peripheral surface of the roller is maintained at between those adjacent areas is divided into three regions in the direction along the side surface of the pocket It is integrally formed in a state where it is bent so as to be opposite to each other in the thickness direction of the vessel body, and these roller stopper pieces are formed on one half circumferential surface and the other half circumferential surface of the roller when the roller rolls. Contact and roller guidance is possible Together they are distributed on both sides of said pocket as each roller stopper piece is formed wider than the width of a width of the circumferential direction in the direction along the side surface of the pocket.
[0008]
As in the above configuration, the cage body is formed in a flat plate shape, pockets are formed in circumferentially equidistant portions of the cage body, and the roller stopper pieces are distributed and formed on both side surfaces facing in the circumferential direction of the pockets. According to the configuration, since it is not necessary to process the cage body into a complicated shape, its manufacture becomes easy, and the outer peripheral surface of the needle roller, for example, is reliably guided in the circumferential direction by the roller stopper piece.
[0009]
The roller stopper piece is formed integrally with each pocket formed in the retainer body by punching on both side portions facing each other in the circumferential direction, and the thickness of the retainer body from both side surfaces of each pocket. It is formed by bending in the direction.
[0010]
As in the above configuration, the roller stopper piece is easily formed by bending from both side surfaces of each pocket toward the thickness direction of the cage body at the time of punching formation of the pocket, and the inclination angle can be easily set. .
[0011]
The thrust needle roller bearing of the present invention includes a bearing ring that is spaced apart in the axial direction, a plurality of needle rollers that are arranged so as to be able to roll between both the bearing rings, and these needle-like rollers. A thrust needle roller bearing including a roller cage for holding the rollers in a circumferentially equidistant position, wherein the retainer is open at a circumferentially equidistant portion of an annular and flat cage body As a result, a plurality of pockets for mounting the needle rollers are formed, and both the side surfaces facing each other in the circumferential direction of each pocket are in contact with the circumferential surface of the needle rollers. The roller stopper pieces for retaining are divided into three regions in the direction along the side of the pocket, and the adjacent regions are integrated in a state where they are bent toward the opposite sides in the thickness direction of the cage body. These roller stoppers are formed in front Contacting the needle rollers on the one side half surface of the roller during rolling and the other side half plane, with are distributed on both sides of said pocket to guide the roller is made possible, the roller stopper piece pocket The width in the direction along the side surface is formed wider than the width in the circumferential direction .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a roller cage for a roller bearing and a thrust needle roller bearing according to an embodiment of the present invention will be described with reference to the drawings.
[0013]
1 is a cross-sectional view showing the overall configuration of a thrust needle roller bearing, FIG. 2 is an enlarged half cross-sectional view in FIG. 1, FIG. 3 is an enlarged cross-sectional view of a main portion, and FIG. 4 is a single enlarged perspective view of a cage. FIG. 6 is a partially enlarged perspective view of a main part, and FIG.
[0014]
As shown in FIGS. 1 to 3, a needle roller bearing 1 according to an embodiment of the present invention includes annular bearing rings (bearing discs) 2 and 3 that are spaced apart from each other in the axial direction and are opposed to each other. It has a plurality of needle rollers 4 that are rotatably arranged between the race rings 2 and 3, and a metal cage 5 for holding these needle rollers 4 at equidistant positions in the circumferential direction.
[0015]
The raceway surfaces of the needle rollers 4 are respectively formed on the opposing surfaces of the raceways 2 and 3. The track rings 2 and 3 are composed of a rotating wheel attached to a rotating shaft (not shown) and a fixed wheel attached to the housing.
[0016]
The cage 5 includes a cage main body 6 formed in an annular and flat plate shape, and a plurality of roller holding pockets (hereinafter simply referred to as pockets) 7 opened at circumferentially equidistant portions of the cage main body 6. Is provided. The diameter of the center hole of the cage body 6 is slightly larger than the diameter of the center holes of both race rings. A needle roller 4 is attached to each pocket 7. The length of each pocket 7 in the radial direction is slightly longer than the length of the needle roller 4.
[0017]
A roller stopper piece 8 that contacts the peripheral surface of the needle roller 4 and prevents the needle roller 4 from being removed is integrally formed on both side surfaces of each pocket 7 facing in the circumferential direction. These roller stoppers 8 can be brought into contact with each of the pockets 7 so as to be able to come into contact with one half circumferential surface (for example, the lower half circumferential surface) 9 and the other half circumferential surface (for example, the upper half circumferential surface) 10 of the needle roller 4. It is distributed on both sides.
[0018]
That is, as shown in FIG. 4 to FIG. 6, among the both side surfaces of each pocket 7, one side circumferential surface of the needle roller 4 is located on one side of the rolling direction of the needle roller 4 on both sides in the radial direction. The first roller stopper piece 11 that can be contacted with the upper portion 9 is formed by being integrally bent with respect to the cage body 6 so as to be along the thickness direction (axial direction) of the cage body 6.
[0019]
Between the first roller stopper pieces 11, a second roller stopper piece 12 that can be brought into contact with the other half circumferential surface 10 of the needle roller 4 is formed by being integrally bent with respect to the cage body 6. .
[0020]
Further, of the both side surfaces of each pocket 7, the second roller stopper that can contact the other half circumferential surface 10 of the needle roller 4 on the other side B in the radial direction on the other side B of the needle roller 4. The piece 12 is formed by being integrally bent with respect to the cage body 6 so as to follow the thickness direction of the cage body 6.
[0021]
Between the second roller stopper pieces 12, a first roller stopper piece 11 that can come into contact with the one-side half circumferential surface 9 of the needle roller 4 is formed by being bent integrally with the cage body 6. .
[0022]
The bending angles of the first roller stopper piece 11 and the second roller stopper piece 12 are, for example, the roller guide surfaces of the first roller stopper piece 11 and the second roller stopper piece 12 in contact with the needle roller 4. Is an angle along the tangential direction of the needle roller 4.
[0023]
In the above configuration, the cage 5 is formed from a single metal plate, and is formed by punching the pockets 7 at circumferentially equidistant positions in the cage body 6 and at predetermined radial positions. . At this time, it processes so that the equivalent parts 11a and 12a of the 1st roller stopper piece 11 and the 2nd roller stopper piece 12 may remain on the both sides | surfaces of each pocket 7. FIG. Thereafter, the corresponding portions 11a and 12a of the first roller stopper piece 11 and the second roller stopper piece 12 are raised from both side surfaces of each pocket 7 in a direction along the axial direction so as to have a predetermined inclination.
[0024]
Then, the needle roller 4 is fitted into each pocket 7 against the elasticity of the first roller stopper piece 11 or the second roller stopper piece 12 from one side or the other side in the thickness direction of the cage body 6. The needle rollers 4 fitted in the pockets 7 are prevented from falling off from the cage 5 in the thickness direction by the first roller stopper pieces 11 and the second roller stopper pieces 12.
[0025]
In this way, the assembly in which the needle roller 4 is mounted on the cage 5 is used by being sandwiched between the inner ring and the outer ring. When the inner ring of the bearing rings rotates around the axis, the first roller stopper piece 11 comes into contact with the one half circumferential surface 9 of the needle roller 4 according to the rotation direction of the inner ring, and the other half circumferential surface 10. The second roller stopper piece 12 comes into contact with the needle roller 4 to guide the needle roller 4 in the circumferential direction, that is, the rolling direction, and the needle roller 4 rolls on the raceway surface.
[0026]
Even when the needle rollers 4 having a relatively short length are used, the plate surface of the cage 5 is conventionally bent by pressing so that the pillar portion of the cage body 6 has a substantially M-shaped cross section. This processing was difficult.
[0027]
However, in the case of the embodiment of the present invention, the cage main body 6 is fixed to one flat metal plate so as to leave the corresponding portions 11a and 12a of the first roller stopper piece 11 and the second roller stopper piece 12. Each pocket 7 is formed so as to be punched at a circumferentially equidistant position and a predetermined radial direction position, and the processing of making the pillar portion of the cage body 6 into a substantially M-shaped cross section is not performed. Then, the first roller stopper piece 11 and the second roller stopper piece 12 are simply bent by bending the corresponding portions 11a and 12a of the first roller stopper piece 11 and the second roller stopper piece 12 left when the pockets 7 are formed. Since it can form, the manufacture of the holder | retainer 5 can be performed easily.
[0028]
In addition, it is possible to omit the difficult press work that has a substantially M-shaped cross section, and to form the pockets 7 by simply punching the flat plate-like cage body 6, so that the radial positions of the pockets 7 can be freely set. The degree increases.
[0029]
Conventionally, the plate surface of the cage 5 is bent so that the cross-section of the column portion is substantially M-shaped by pressing, so that the flow of the lubricant is easily blocked in the radial direction, and therefore the lubrication performance is lowered. It was easy. On the other hand, according to the embodiment of the present invention, the flat metal plate is punched to form the pocket 7, and the first roller stopper piece 11 and the second roller stopper piece 12 are simply bent. There are few portions to be blocked, and therefore the lubricity with respect to the needle rollers 4 is improved.
[0030]
The present invention is not limited to this, and the first roller stopper piece 11 that can come into contact with the one-side half surface 9 of the needle roller 4 and the first roller contact piece 10 that can come into contact with the other half-side surface 10 of the needle roller 4. The two roller stopper pieces 12 may be arranged in a well-balanced manner so as to be able to come into contact with the upper half circumferential surface 9 of the needle roller 4 and the other half circumferential surface 10 of the needle roller 4.
[0031]
In the embodiment shown in FIG. 7, second roller stoppers 12 that can come into contact with the other half circumferential surface 10 of the needle roller 4 are integrally formed on both sides in the radial direction of one side surface of each pocket 7. The first roller stopper piece 11 is integrally formed between the second roller stopper pieces 12 so as to be able to come into contact with the one half circumferential surface 9 of the needle roller 4.
[0032]
Further, a second roller stopper piece 12 that can be brought into contact with the other half circumferential surface 10 of the needle roller 4 is integrally formed on each side portion of each pocket 7 in the radial direction on the other side surface. A first roller stopper piece 11 that can be brought into contact with one half peripheral surface 9 of the needle roller 4 is integrally formed between the pieces 12.
[0033]
In the embodiment shown in FIG. 8, second roller stoppers 12 that can come into contact with the other half circumferential surface 10 of the needle roller 4 are integrally formed at both radial side portions of one side surface of each pocket 7. The first roller stopper piece 11 is integrally formed between the second roller stopper pieces 12 so as to be able to come into contact with the one half circumferential surface 9 of the needle roller 4.
[0034]
Moreover, the 1st roller stopper piece 11 which can be contacted on the one side surrounding surface 9 of the needle roller 4 is integrally formed in the radial direction both sides part of the other side surface of each pocket 7, These these first roller stopper pieces 11, a second roller stopper piece 12 that can be brought into contact with the other half circumferential surface 10 of the needle roller 4 is formed integrally. In each of these embodiments, the same operational effects as those of the above embodiment can be obtained.
[0035]
【The invention's effect】
As is apparent from the above description, according to the present invention, a cage having a pocket having a length corresponding to the axial length of the needle roller can be manufactured inexpensively and easily.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the overall configuration of a thrust needle roller bearing according to an embodiment of the present invention.
FIG. 2 is an enlarged half sectional view of FIG.
FIG. 3 is a partially enlarged sectional view of the same. FIG. 4 is a single enlarged perspective view of the cage.
FIG. 5 is a partially enlarged perspective view of the same.
FIG. 6 is a partially enlarged view showing a state in which a pocket is similarly punched out.
FIG. 7 is a partially enlarged perspective view of a cage showing another embodiment.
FIG. 8 is a partially enlarged perspective view of a cage showing still another embodiment.
FIG. 9 is an enlarged determination side view of a conventional cage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Needle roller bearing 4 Needle roller 5 Cage 6 Cage body 7 Pocket 8 Roller stop piece 9 One side half peripheral surface 10 The other side half peripheral surface 11 First roller stop piece 12 Second roller stop piece

Claims

A roller retainer for holding a plurality of rollers, which are arranged so as to be able to roll, in a circumferentially equidistant position between raceway surfaces arranged apart in the axial direction,
A plurality of pockets for mounting the rollers are formed by opening circumferentially equidistant portions of the annular and flat cage body, and each of the pockets facing each other in the circumferential direction of each pocket is formed. The roller stopper pieces that come into contact with the peripheral surface of the roller and prevent the rollers from being separated are divided into three regions in the direction along the side surface of the pocket. It is integrally formed in a state bent toward the opposite side ,
These roller stopper pieces are in contact with the one half circumferential surface and the other half circumferential surface of the roller at the time of rolling of the roller, and are distributed to both side surfaces of the pocket so that the roller can be guided ,
Each roller stopper piece is a roller bearing roller cage in which the width in the direction along the side surface of the pocket is wider than the width in the circumferential direction .

A roller cage for roller bearings according to claim 1,
The roller stopper piece is formed integrally with each pocket formed in the cage body by punching on both side surfaces facing each other in the circumferential direction, and from the both sides of each pocket in the thickness direction of the cage body. A roller cage for roller bearings, which is formed by bending to face.

A bearing ring that is spaced apart in the axial direction, a plurality of needle rollers that are rotatably arranged between the both bearing rings, and for holding these needle rollers at equal circumferential positions. A thrust needle roller bearing including a roller cage,
The retainer has a plurality of pockets for attaching the needle rollers by opening a circumferentially equidistant portion of the annular and flat retainer body, and in the circumferential direction of each of these pockets The roller stopper pieces that come into contact with the circumferential surface of the needle roller and prevent the rollers from coming off are divided into three regions in the direction along the side surface of the pocket, and the adjacent regions are opposed to each other on both opposing side surfaces. Then, it is integrally formed in a state bent toward the opposite sides in the thickness direction of the cage body ,
The roller stopper pieces are distributed on both side surfaces of the pocket so that the rollers can be in contact with each other when the needle roller rolls on the one half circumferential surface and the other half circumferential surface of the rollers. ,
A thrust needle roller bearing in which each roller stopper piece is formed so that the width in the direction along the side surface of the pocket is wider than the width in the circumferential direction .