JPH081683U - Roller bearing cage - Google Patents

Abstract

(57)【要約】 【課題】保持器の外周面と外輪内周面との間の接触面圧
を可及的に小さく抑えて焼付きの発生を未然に防止しな
がらも、特に二分割構造とした場合の外輪部材の内周面
に対する吸いつき作用の発生を阻止して回転性能の向上
を図る。 【解決手段】円筒形のパイプを所定寸法に切断して保持
器基材を用意し、この保持器基材の内周面のほぼ中央に
内周溝４を形成し、保持器基材の円周数ケ所にポケット
３を打ち抜き形成し、保持器基材の外周面を粗研磨し、
ポケット形成工程及び粗研磨工程によって不可避的に保
持器基材の外周面に発生した波形部分のうちの各***部
の頂部それぞれの表面を一定曲率半径を有する円筒形面
１３を形成するように超研磨してなるころ軸受用保持
器。 (57) 【Abstract】 PROBLEM TO BE SOLVED: To suppress the contact surface pressure between the outer peripheral surface of the cage and the inner peripheral surface of the outer ring as much as possible to prevent the occurrence of seizure. In this case, the occurrence of the sticking action to the inner peripheral surface of the outer ring member is prevented to improve the rotation performance. SOLUTION: A cylindrical pipe is cut into a predetermined size to prepare a cage base material, and an inner peripheral groove 4 is formed at substantially the center of the inner peripheral surface of the cage base material. The pockets 3 are punched out at several places, and the outer peripheral surface of the cage base material is roughly ground.
In order to form a cylindrical surface 13 having a constant radius of curvature on the top surface of each ridge of the corrugated portion inevitably generated on the outer peripheral surface of the cage base material by the pocket forming step and the rough polishing step. Roller bearing cage made by polishing.

Description

【考案の詳細な説明】[Detailed description of the device]

【０００１】[0001]

【考案の属する技術分野】[Technical field to which the device belongs]

本考案は、ころ軸受用保持器、詳しくは内燃機関などに用いられる針状ころ軸 受用の保持器に関する。 The present invention relates to a roller bearing cage, and more particularly to a needle roller bearing cage used in an internal combustion engine or the like.

【０００２】[0002]

【従来の技術】[Prior art]

例えば、内燃機関のコネクティングロッドとクランクシャフトとの嵌め合い部 分などには、軌道輪を持たないころ及び保持器よりなるころ軸受が用いられる傾 向にある。 For example, there is a tendency to use roller bearings having rollers and cages, which do not have bearing rings, for fitting parts such as connecting rods and crankshafts of internal combustion engines.

【０００３】 従来のこの種のころ軸受用の保持器として、例えば、特開昭61−266827号公報 に示すようなものがある。それを図２及び図３に示して簡単に説明する。As a conventional cage for this type of roller bearing, for example, there is one shown in Japanese Patent Laid-Open No. 61-266827. This will be briefly described with reference to FIGS. 2 and 3.

【０００４】 図において、１はころ軸受用保持器、２はころ、３はころ収容用ポケット、４ は保持器１の軸方向中央部に形成された所定幅を有する内周溝、５は周方向で隣 り合うポケット３間を仕切る仕切部である。この内周溝４により仕切部５の軸方 向中央部分における径方向厚みは、他の部分よりも薄肉に形成されており、この 薄肉部分に符号６を、またその両側の厚肉部分に符号７をそれぞれ付してある。In the drawing, 1 is a roller bearing retainer, 2 is a roller, 3 is a roller accommodating pocket, 4 is an inner peripheral groove having a predetermined width formed in a central portion of the retainer 1 in the axial direction, and 5 is a peripheral groove. It is a partition that separates adjacent pockets 3 in the direction. Due to the inner circumferential groove 4, the radial thickness at the central portion in the axial direction of the partition portion 5 is formed to be thinner than the other portions. Reference numeral 6 denotes this thin portion, and reference numerals 6 denote thick portions on both sides thereof. 7 is attached to each.

【０００５】 この薄肉部６には厚肉部７の側面よりもポケット内方に僅かに突出させられた 外側突起８を備えており、この外側突起８によってころ２の径方向外方への抜け 出しを阻止するようになっている。また、厚肉部７の内径面には円周方向に沿う 凹溝９が形成されており、この凹溝９の開口端には厚肉部７の側面よりもポケッ ト内方へ僅かに突出させられた内側突起10を備えている。この内側突起10によっ てころ２の径方向内方への抜け出しを阻止するようになっている。前述の凹溝９ は、ローレット加工により形成されるものであって、このローレット加工時の塑 性変形によって内側突起10が得られる。The thin portion 6 is provided with an outer protrusion 8 slightly protruding inward of the pocket than the side surface of the thick portion 7, and the outer protrusion 8 allows the roller 2 to slip outward in the radial direction. It is designed to prevent the outbreak. Further, a concave groove 9 is formed on the inner diameter surface of the thick portion 7 along the circumferential direction, and the opening end of the concave groove 9 slightly protrudes inward from the side surface of the thick portion 7 in the pocket. It is provided with an inner protrusion 10 which is made to move. The inner protrusions 10 prevent the rollers 2 from coming out radially inward. The above-mentioned concave groove 9 is formed by knurling, and the inner protrusion 10 is obtained by plastic deformation during this knurling.

【０００６】 そして、ポケット３にころ２を収容した状態においては、ころ２は、径方向内 外に抜け出さないようにポケット３内に拘束されるが、径方向及び円周方向に所 定量動きうるようになっている。なお、使用状況では、ころ２は保持器１の厚肉 部７の側面で案内されるようになっている。In the state where the roller 2 is housed in the pocket 3, the roller 2 is constrained in the pocket 3 so as not to slip out inward and outward in the radial direction, but can move a certain amount in the radial direction and the circumferential direction. It is like this. In addition, in use, the roller 2 is guided by the side surface of the thick portion 7 of the cage 1.

【０００７】 この種のころ軸受用保持器１の製作手法を簡単に説明する。A method of manufacturing this type of roller bearing cage 1 will be briefly described.

【０００８】 まず、例えば円筒形のパイプを所定寸法に切断して保持器基材を用意し、この 保持器基材の内周面のほぼ中央に内周溝４を形成する。この後、図４に示すよう に、保持器基材の円周数ケ所に適当なパンチ治具Ａでポケット３を打ち抜き形成 する〔ポケット形成工程〕。続いて、保持器基材の外周面を粗研磨する〔粗研磨 工程〕。First, for example, a cylindrical pipe is cut into a predetermined size to prepare a retainer base material, and an inner peripheral groove 4 is formed substantially at the center of the inner peripheral surface of the retainer base material. After this, as shown in FIG. 4, pockets 3 are punched and formed by a suitable punch jig A at several places on the circumference of the cage base material (pocket forming step). Subsequently, the outer peripheral surface of the cage base material is roughly polished [rough polishing step].

【０００９】 ところで、上述のようにして製作されるころ軸受用保持器１では、ポケット形 成工程においてポケット３において図４の一点鎖線で示す範囲内に内径側へのだ れが発生してしまうとともに、後の粗研磨工程により前記だれが周方向で拡がっ てしまい、そのために、特に、ポケット３の軸方向両側の環状部外周面が図５に 示すように周方向に波打つ形状となる。By the way, in the roller bearing retainer 1 manufactured as described above, in the pocket forming process, sagging toward the inner diameter side occurs in the pocket 3 within the range shown by the alternate long and short dash line in FIG. At the same time, the sagging spreads in the circumferential direction due to the subsequent rough polishing step, so that, in particular, the outer peripheral surfaces of the annular portions on both axial sides of the pocket 3 have a wavy shape in the circumferential direction as shown in FIG.

【００１０】 また、このころ軸受用保持器１が外径案内タイプの場合、該保持器１の特に前 記波形部分の***部11頂部がコネクティングロッドなどの外輪部材の内周面に対 してほぼ点で接触することになり、当該接触部分における面圧が高くなる他、外 輪部材の内周面の潤滑油膜をかきとりやすくなり、焼付きを招来する原因となっ ている。Further, when the roller bearing cage 1 is an outer diameter guide type, the top of the raised portion 11 of the cage 1, particularly the corrugated portion described above, faces the inner peripheral surface of the outer ring member such as the connecting rod. Since they come into contact with each other at almost points, the surface pressure at the contact portion becomes high, and it becomes easy to scrape off the lubricating oil film on the inner peripheral surface of the outer ring member, causing seizure.

【００１１】 これに対して、本件考案者らは、前記従来のころ軸受用保持器１に対し、ころ を超研磨仕上げする手法と同様の方法にて超研磨を施し、該保持器１の外周面を ほぼ真円形状にするとともに外周面の凹凸を無くすことを考え実施している。こ の超研磨加工は、図６に示すように、対向配置される二つのガイドローラＢ，Ｃ の間に保持器１を配置するとともに、この保持器１の外周面に対して外径側から 砥石Ｄを所定圧で押し付けるような形態とし、ガイドローラＢ，Ｃによって保持 器１を回転させることで、保持器１の外周面における波形部分をその最も深い窪 み部12の底に達するまで研磨するものである。On the other hand, the inventors of the present invention performed super-polishing on the conventional roller bearing cage 1 by a method similar to the method of super-polishing rollers to finish the outer circumference of the cage 1. It is being implemented with the idea of making the surface almost circular and eliminating irregularities on the outer peripheral surface. In this super-polishing process, as shown in FIG. 6, the cage 1 is arranged between two guide rollers B and C facing each other, and the cage 1 is arranged from the outer diameter side with respect to the outer peripheral surface thereof. The whetstone D is pressed with a predetermined pressure, and the cage 1 is rotated by the guide rollers B and C, whereby the corrugated portion on the outer peripheral surface of the cage 1 is polished until it reaches the bottom of the deepest recess 12. To do.

【００１２】[0012]

【考案が解決しようとする課題】[Problems to be solved by the device]

ところで、コネクティングロッドとクランクシャフトとの間に装着するころ軸 受では、二分割の保持器を用いることがある。この二分割タイプの保持器は、上 記の如く形成される保持器１を割ることによって得られるが、この二分割タイプ の保持器において、前述のように外周面の凹凸を無くしていると、当該保持器が コネクティングロッドの内周面に対して両者間に介在する潤滑油が原因となって 密着することがある。このため、保持器がひきずられて回転バランスが狂いやす くなることが懸念される。かといって、保持器の外周面を超研磨せずに波形のま まにしていると、上述した焼付きといった不都合が生ずる。 By the way, a roller bearing mounted between the connecting rod and the crankshaft may use a two-divided cage. This two-divided type cage is obtained by dividing the cage 1 formed as described above. In this two-divided type cage, if the irregularities on the outer peripheral surface are eliminated as described above, The cage may come into close contact with the inner peripheral surface of the connecting rod due to the lubricating oil interposed between them. Therefore, there is concern that the cage may be dragged and the rotational balance may be lost. On the other hand, if the outer peripheral surface of the cage is left in a corrugated shape without being super-polished, the above-described problem of seizure occurs.

【００１３】 本考案はこのような事情に鑑みて創案されたもので、保持器の外周面と外輪内 周面との間の接触面圧を可及的に小さく抑えて焼付きの発生を未然に防止しなが らも、特に二分割構造とした場合の外輪部材の内周面に対する吸いつき作用の発 生を阻止して回転性能の向上を図ることを目的としている。The present invention was devised in view of such circumstances, and suppresses the contact surface pressure between the outer peripheral surface of the cage and the inner peripheral surface of the outer ring as small as possible to prevent the occurrence of seizure. In addition to preventing the above, the purpose of the present invention is to improve the rotation performance by preventing the occurrence of the sticking action to the inner peripheral surface of the outer ring member especially in the case of the two-part structure.

【００１４】[0014]

【課題を解決するための手段】[Means for Solving the Problems]

本考案では、ころ軸受用保持器を、円筒形のパイプを所定寸法に切断して保持 器基材を用意し、この保持器基材の内周面のほぼ中央に内周溝を形成し、保持器 基材の円周数ケ所にポケットを打ち抜き形成し、保持器基材の外周面を粗研磨し 、ポケット形成工程及び粗研磨工程によって不可避的に保持器基材の外周面に発 生した波形部分のうちの各***部の頂部それぞれの表面を一定曲率半径を有する 円筒形面を形成するように超研磨してなる構成とした。 In the present invention, a roller bearing cage is prepared by cutting a cylindrical pipe into a predetermined size to prepare a cage base material, and forming an inner circumferential groove at substantially the center of the inner circumferential surface of the cage base material. Cages Pockets were punched out at several places on the circumference of the base material, the outer peripheral surface of the base material of the cage was roughly ground, and the outer peripheral surface of the base material of the cage was unavoidably generated by the pocket forming process and the rough polishing process. The top surface of each ridge of the corrugated portion was super-polished to form a cylindrical surface having a constant radius of curvature.

【００１５】 上記構成によると、保持器が外輪部材の内周面に対して接触する場合、部分円 筒面が外輪部材の内周面に対して接触するといった面接触になるので、接触面圧 を小さく抑えられる他、潤滑油膜がかきとられる心配もなくなる。According to the above structure, when the cage contacts the inner peripheral surface of the outer ring member, the partial cylindrical surface comes into contact with the inner peripheral surface of the outer ring member. In addition to keeping the oil pressure small, there is no need to worry about scratching the lubricating oil film.

【００１６】 また、円周数ケ所で保持器と外輪部材とが前述のように面接触するものの、保 持器の軸方向両端の環状部外周面に窪み部を残していて、これが外輪部材の内周 面との間で空隙を形成するので、その空隙部位に対する気体の介入によって該保 持器と外輪部材とが密着しにくくなり、回転バランスが安定しやすくなる。Further, although the cage and the outer ring member are in surface contact with each other at several places on the circumference as described above, there are recesses on the outer peripheral surfaces of the annular portions at both ends in the axial direction of the retainer. Since a gap is formed between the retainer and the outer ring member, a gap is formed between the retainer and the outer ring member due to the gas intervening in the gap portion, and the rotation balance is easily stabilized.

【００１７】[0017]

【考案の実施の形態】[Embodiment of device]

以下、本考案の実施例を図面に基づいて詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

【００１８】 図１に本考案の一実施例を示している。実施例の図において、従来例の図５に 示す部品，部分と同一のものに同じ符号を付し、その説明を省略する。FIG. 1 shows an embodiment of the present invention. In the drawings of the embodiments, the same parts and portions as those shown in FIG. 5 of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.

【００１９】 本実施例において従来例と異なる構成は、保持器１の軸方向両端の環状部外周 面の形状である。In this embodiment, the configuration different from the conventional example is the shape of the outer peripheral surface of the annular portion at both axial ends of the cage 1.

【００２０】 詳しくは、従来例の図２及び図３に示した構造の保持器１では、ポケット形成 工程及び粗研磨工程の処理に伴い、保持器１の外周面が波打つ形状になるのは避 けられないから、この不可避的に発生する波形部分について、以下のように処理 することで、保持器１の軸方向両端の環状部分外周面の円周数ケ所に前記波形部 分の窪み部12を残しているとともに、窪み部12それぞれの間の***部11の表面を 部分円筒形に形成している。この***部11において部分円筒形の面に符号13を付 している。Specifically, in the cage 1 having the structure shown in FIGS. 2 and 3 of the conventional example, it is avoided that the outer peripheral surface of the cage 1 becomes wavy due to the pocket forming step and the rough polishing step. Therefore, the corrugated portion which is inevitably generated is processed as follows, so that the recessed portion 12 of the corrugated portion is formed at several circumferential positions on the outer peripheral surface of the annular portion at both axial ends of the cage 1. And the surface of the raised portion 11 between the recessed portions 12 is formed into a partially cylindrical shape. In this raised portion 11, a reference numeral 13 is given to the partially cylindrical surface.

【００２１】 次に、上記保持器１の製作手順の一例を説明する。Next, an example of a manufacturing procedure of the cage 1 will be described.

【００２２】 従来例で説明したように、円筒形の保持器基材に内周溝４を形成する工程、保 持器基材にポケット３を形成する工程、保持器基材の外周面を粗研磨する工程ま でを同じとし、この後の保持器基材の外周面を超研磨する工程の作業内容が従来 例の場合と異なる。As described in the conventional example, the step of forming the inner peripheral groove 4 in the cylindrical cage base material, the step of forming the pocket 3 in the cage base material, and the rough outer surface of the cage base material. The process up to the polishing step is the same, and the work content of the subsequent step of super-polishing the outer peripheral surface of the cage substrate is different from that of the conventional example.

【００２３】 この超研磨工程は、図６と同様の形態で行うのであるが、研磨量を以下のよう に規制する。即ち、ポケット形成工程及び粗研磨工程によって不可避的に発生し た波形部分のうちの各***部11の頂部それぞれの表面を一定曲率半径を有する部 分円筒形にするとともに、前記波形部分の各窪み部12を意図的に浅く残すように 、保持器１の外周面を研磨する。例えば図６において仮想線で示す位置まで研磨 すれば、図１に示すような外周面形状が得られる。This super-polishing step is performed in the same manner as in FIG. 6, but the polishing amount is restricted as follows. That is, the surface of each apex of each raised portion 11 of the corrugated portion inevitably generated by the pocket forming step and the rough polishing step is formed into a cylindrical shape having a certain radius of curvature, and each depression of the corrugated portion is formed. The outer peripheral surface of the cage 1 is polished so that the portion 12 is intentionally left shallow. For example, if the polishing is performed up to the position indicated by an imaginary line in FIG. 6, the outer peripheral surface shape as shown in FIG. 1 is obtained.

【００２４】 前記研磨量は、例えば粗研磨加工後の波形部分の***部11と窪み部12との高低 差Δｈ₁ が約60〜70μｍになるから、それを考慮して、超研磨加工後の窪み部12 の深さΔｈ₂ が約５〜50μｍの範囲内に収まるよう設定するのが好ましい。As for the polishing amount, for example, the height difference Δh ₁ between the raised portion 11 and the recessed portion 12 of the corrugated portion after the rough polishing processing is about 60 to 70 μm. It is preferable to set the depth Δh ₂ of the recess 12 within the range of about 5 to 50 μm.

【００２５】 このような表面処理が施された保持器１では、それが外輪部材の内周面に対し て接触した場合、保持器１の軸方向両端の環状部外周面のうち、部分円筒面13が 外輪部材の内周面に対して面接触することになり、接触時の面圧が小さくて済む ばかりか、外輪部材の内周面に形成される潤滑油膜のかきとりが大幅に軽減され ることになる。また、外輪部材に対する保持器１の接触時において部分円筒面13 それぞれの間の窪み部12と外輪部材の内周面との間に空隙が形成され、この空隙 に対して気体が介入するために、保持器１が外輪部材の内周面に対して吸いつく といった現象が発生せずに済む。したがって、外輪部材と保持器１との接触によ る焼付きや，外輪部材に対する保持器１の密着による保持器１の回転バランスの 狂いといった不都合を併せて回避できる結果となる。In the cage 1 subjected to such a surface treatment, when it comes into contact with the inner peripheral surface of the outer ring member, of the outer peripheral surfaces of the annular portions at both axial ends of the retainer 1, the partial cylindrical surface is formed. Since 13 comes into surface contact with the inner peripheral surface of the outer ring member, not only the surface pressure at the time of contact is small, but also scraping of the lubricating oil film formed on the inner peripheral surface of the outer ring member is significantly reduced. It will be. Further, when the cage 1 is brought into contact with the outer ring member, a gap is formed between the recess 12 between the respective partial cylindrical surfaces 13 and the inner peripheral surface of the outer ring member, and gas intervenes in this gap. Therefore, the phenomenon that the cage 1 sticks to the inner peripheral surface of the outer ring member does not occur. Therefore, it is possible to avoid problems such as seizure caused by contact between the outer ring member and the cage 1, and improper rotation balance of the cage 1 due to close contact of the cage 1 with the outer ring member.

【００２６】 なお、上記実施例において、窪み部12と部分円筒面13との連接部位に丸みを持 たせてもよい。In addition, in the above-described embodiment, the connecting portion between the recess 12 and the partial cylindrical surface 13 may be rounded.

【００２７】[0027]

【考案の効果】 以上説明したように、本考案では、保持器の外輪部材に対する接触時の面圧を 可及的に軽減できる上、保持器の外輪部材に対する密着を阻止できるから、焼付 きの回避や回転性能の向上を実現できるようになる。As described above, according to the present invention, the surface pressure at the time of contact with the outer ring member of the cage can be reduced as much as possible and the close contact of the cage with the outer ring member can be prevented, so that seizure Avoidance and improvement of rotation performance can be realized.

【００２８】 このように、本考案は、近年益々要求される厳しい諸条件を満足するころ軸受 用保持器を提供することができる。As described above, the present invention can provide a roller bearing retainer that satisfies the severe conditions that have been increasingly demanded in recent years.

【図面の簡単な説明】[Brief description of drawings]

【図１】本考案のころ軸受用保持器の軸方向両端の環状
部外周面の形状を示す形状測定図FIG. 1 is a shape measurement view showing the shape of an outer peripheral surface of an annular portion at both axial ends of a roller bearing cage according to the present invention.

【図２】ころ軸受用保持器の従来例を略示した縦断面図FIG. 2 is a longitudinal sectional view schematically showing a conventional example of a roller bearing cage.

【図３】図２のＸ−Ｘ線断面図3 is a sectional view taken along line XX of FIG.

【図４】ポケットを打ち抜く形態を示す模式図FIG. 4 is a schematic view showing a form of punching out a pocket.

【図５】従来例の第１図に対応する形状測定図FIG. 5 is a shape measurement diagram corresponding to FIG. 1 of a conventional example.

【図６】保持器外周面を超研磨加工する形態を示す模式
図FIG. 6 is a schematic view showing a form in which the outer peripheral surface of the cage is super-polished.

【符号の説明】[Explanation of symbols]

１…保持器、 ２…ころ、 ３…ポケット、 ４…内周溝、 ５…仕切部、 ６…薄肉部、 ７…厚肉部、 ８…外側突起、 10…内側突起、 11…***部、 12…窪み部、 13…部分円筒面。 1 ... Retainer, 2 ... Roller, 3 ... Pocket, 4 ... Inner peripheral groove, 5 ... Partition part, 6 ... Thin part, 7 ... Thick part, 8 ... Outer projection, 10 ... Inner projection, 11 ... Raised part, 12… Indentation, 13… Partial cylindrical surface.

フロントページの続き (72)考案者 増田 史郎 宇都宮市五代３丁目８番26号Continuation of the front page (72) Inventor Shiro Masuda 3-8-25 Godai, Utsunomiya City

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】 円筒形のパイプを所定寸法に切断して保
持器基材を用意し、この保持器基材の内周面のほぼ中央
に内周溝を形成し、保持器基材の円周数ケ所にポケット
を打ち抜き形成し、保持器基材の外周面を粗研磨し、ポ
ケット形成工程及び粗研磨工程によって不可避的に保持
器基材の外周面に発生した波形部分のうちの各***部の
頂部それぞれの表面を一定曲率半径を有する円筒形面を
形成するように超研磨してなるころ軸受用保持器。1. A holder base material is prepared by cutting a cylindrical pipe into a predetermined size, and an inner peripheral groove is formed substantially at the center of the inner peripheral surface of the holder base material. Pockets are punched out in several places, the outer peripheral surface of the cage base material is roughly ground, and each ridge of the corrugated portion inevitably generated on the outer peripheral surface of the cage base material by the pocket forming process and the rough polishing process. A roller bearing cage formed by super-polishing the surfaces of the tops of the respective parts so as to form a cylindrical surface having a constant radius of curvature.