JP4508751B2 - Thrust needle roller bearing - Google Patents

Thrust needle roller bearing Download PDF

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JP4508751B2
JP4508751B2 JP2004196590A JP2004196590A JP4508751B2 JP 4508751 B2 JP4508751 B2 JP 4508751B2 JP 2004196590 A JP2004196590 A JP 2004196590A JP 2004196590 A JP2004196590 A JP 2004196590A JP 4508751 B2 JP4508751 B2 JP 4508751B2
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roller
groove
thrust
cage
retainer
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JP2006017245A (en
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真司 大石
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NTN Corp
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この発明は、各種の機器、例えばオートマチックトランスミッションや、コンプレッサ等に使用されるスラストころ軸受に関し、特に保持器強度を高くして低断面化が可能なスラスト針状ころ軸受に関するものである。 The present invention, various devices, and for example automatic transmissions, relates thrust roller bearing used in a compressor or the like, and relates to a thrust needle roller bearing which can particularly high to the low profile of the cage strength.

スラストころ軸受は、ころと保持器、および軌道輪で構成され、ころと軌道面とが線接触する構造であるため、軸受投影面積が小さい割に高負荷容量と高剛性が得られる利点を有している。従って、希薄潤滑下や高速回転下での運転等、過酷な使用条件で使用する軸受として好適であり、例えば自動車のオートマチックトランスミッション用軸受やエアーコンプレッサ用軸受として広く利用されている。   Thrust roller bearings are composed of rollers, cages, and bearing rings, and have a structure in which the rollers and raceway are in line contact with each other. is doing. Therefore, it is suitable as a bearing used under severe use conditions such as operation under lean lubrication or high-speed rotation, and is widely used, for example, as a bearing for an automatic transmission of an automobile or a bearing for an air compressor.

スラストころ軸受に使用される保持器としては、一般に、冷間圧延鋼板を曲げ加工した図１０のようなＷ形の一体の保持器５２や、図１１のような２種類の保持器部品５３ａ，５３ｂを組み合わせた箱形保持器５３が知られている。このようなＷ形や箱形とすることで、ころ５１が保持器５２，５３のポケットから両面に脱落することがないものとでき、軌道輪（図示せず）への未組み立て状態においても、一つの組み立て部品の保持器付きころとして取り扱うことができる。上記Ｗ形保持器の例としては、特許文献１に示されるものがある。
特開２０００−１９２９６５号公報 As a cage used for the thrust roller bearing, generally, a W-shaped integral cage 52 as shown in FIG. 10 obtained by bending a cold-rolled steel plate, two types of cage components 53a as shown in FIG. A box-shaped cage 53 in which 53b is combined is known. By adopting such a W shape or box shape, the rollers 51 can be prevented from falling off from both sides of the pockets of the cages 52 and 53, and even in an unassembled state on the race ring (not shown), It can be handled as a roller with cage of one assembly part. An example of the W-shaped cage is disclosed in Patent Document 1.
JP 2000-192965 A

近年、自動車のオートマチックトランスミッション、コンプレッサ等のコンパクト化が進んでいる。そのため軸受のコンパクト化、特に軸方向のコンパクト化が要求されている。
保持器付きころ形式等のスラストころ軸受において、軸方向のコンパクト化、つまり低断面化とする場合、転動体であるころの径が細くなる。そのため、従来のＷ形保持器５２（図１０）や箱形保持器５３（図１１）では、共に保持器断面の高さが低くなり、保持器の剛性が低くなる。このため、プレス工程や熱処理工程で、保持器５２，５３の反りやうねり状の変形が発生することがある。したがって、鋼板の曲げ加工による保持器を備えたスラスト針状ころ軸受の低断面化には限界があり、その抜本的な改善が望まれる。 In recent years, downsizing of automatic transmissions and compressors of automobiles has been progressing. For this reason, it is required to make the bearings compact, particularly in the axial direction.
In a thrust roller bearing such as a roller type with a cage, when the axial direction is made compact, that is, the section is reduced, the diameter of the roller as a rolling element is reduced. For this reason, in the conventional W-shaped cage 52 (FIG. 10) and the box-shaped cage 53 (FIG. 11), the height of the cage cross section is reduced, and the rigidity of the cage is lowered. For this reason, the warp and the undulation-like deformation of the cages 52 and 53 may occur in the pressing process and the heat treatment process. Therefore, there is a limit to the reduction in the cross section of the thrust needle roller bearing provided with the cage by bending the steel plate, and a drastic improvement thereof is desired.

この発明の目的は、保持器に対してころを脱落防止構造としたスラスト針状ころ軸受において、保持器強度を確保でき、変形にも強く、かつコスト高にならないようにしながら、低断面化を図ることができるものを提供することである。 The purpose of the present invention is a thrust preparative needle roller bearings with a falling-off preventing structure roller against the cage, the cage strength can be secured, deformation resistant, and while so as not to cost, low profile It is to provide something that can be realized.

この発明のスラスト針状ころ軸受は、針状のころおよび保持器を備え、前記保持器は板状で円環状に形成されて円周方向の複数箇所にポケットを有し、前記各ポケットにころを転動自在に収容したスラストころ軸受において、前記保持器は一枚板の保持器であって、前記各ポケット間の柱部が、この柱部の中央で保持器の一方の面に設けられた中央溝と、この中央溝の両側で保持器の他方の面に設けられた内径側溝および外径側溝とを有し、この保持器は、板厚がころの径よりもやや薄い板状で円環状のブランク材に、前記中央溝、内径側溝、および外径側溝となる各円周溝がコイニングまたはその他の冷間鍛造により形成されて、前記中央溝、内径側溝、および外径側溝の底壁となる部分が、前記冷間鍛造により前記ブランク材から薄肉化された部分とされ、かつ前記各ポケットが形成されたものとする。前記柱部は、各溝の底壁となる前記薄肉化された部分からポケット内に突出して前記ころを抜け止めする突片状のころ止め部を有する。前記中央溝の底壁となる部分から突出するころ止め部と前記内径側溝および外径側溝の底壁となる部分から突出するころ止め部とは、互いに保持器の厚み方向における反対側位置にあって、ころをポケット内に保持器厚み方向の両方向に対して抜出不能状態に保持するものとする。 Thrust DOO needle roller bearings of the present invention is provided with a needle-like this Rooyobi retainer, said retainer comprises a pocket in a plurality of positions in the circumferential direction is formed in an annular plate-like, each the rollers in the pockets Te rollably contained the thrust roller bearing smell, said retainer is a retainer of the single plate, before Symbol pillar portions between the pockets, one of the cage in the middle of the column portion a central groove provided in the surface, have a the other inner diameter side groove provided on a surface and the outer diameter groove of the cage on both sides of the central groove, the retainer than the diameter of the plate thickness around In the slightly thin plate-like and annular blank material, each of the circumferential grooves to be the central groove, the inner diameter side groove, and the outer diameter side groove is formed by coining or other cold forging, and the central groove, the inner diameter side groove, and The portion that becomes the bottom wall of the outer diameter side groove is thinned from the blank material by the cold forging. It is a part, and it is assumed that each pocket is formed. The pillar portion has a protrusion shaped roller stopper portion bottom wall and ing the projects thinned part know pockets for retaining said rollers of each groove. The roller stopper that protrudes from the bottom wall of the central groove and the roller stopper that protrudes from the inner wall and outer wall of the central groove are opposite to each other in the thickness direction of the cage. Te, it shall keep rollers to extraction disabled state for both directions of the thickness direction of the cage in the pocket.

この構成によると、保持器の柱部が、一方の面に設けられた中央溝と他方の面に設けられた内径側溝，外径側溝とにより、ころ中心の両側に上記各溝の底壁となる薄肉化部分が設けられ、これらの薄肉化された部分からポケット内に突出する突片状のころ止め部を有するものとしたため、ポケット内のころが、保持器の表裏両面に対して脱落防止される。保持器柱部は、上記各溝を有する形状とするが、ブランク材のコイニングまたはその他の冷間鍛造により形成されるため、曲げ加工による場合に比べて保持器強度が強く、加工や熱処理に伴う変形が無いものとできる。これらにより、保持器の低断面化が容易となる。保持器の変形については、輪郭が一枚板の保持器であるため、プレステンパー等による矯正も可能である。さらに、プレス加工の工程が少なくて済み、安価に製造することができる。   According to this configuration, the pillar portion of the cage has a central groove provided on one surface and an inner diameter side groove and an outer diameter side groove provided on the other surface. Because it has thin-walled parts that have protruding piece-shaped roller stoppers that protrude into these pockets from these thinned parts, the rollers in the pockets are prevented from falling off both the front and back sides of the cage Is done. The cage pillar portion has a shape having each of the above-mentioned grooves, but is formed by blanking coining or other cold forging, so the cage strength is stronger than in the case of bending and is accompanied by processing and heat treatment. There can be no deformation. These facilitate the reduction of the cross section of the cage. About the deformation | transformation of a holder | retainer, since the outline is a holder | retainer of a single board, correction | amendment by a press temper etc. is also possible. Furthermore, the number of press working steps is small, and it can be manufactured at a low cost.

この発明において、前記保持器の各ころ止め部の前記ころの外径面が接する箇所に、面取状部を設けても良い。
面取状部が設けられていると、その面取状部にころを進入させることができて、ころ止め部に対するころの掛かり代を大きくできる。そのため、保持器の低断面化によって両側のころ止め部が、ころ中心からあまり離れた位置とできず、表裏両側のころ止め部間にころの周面の一部を進入させる掛かり代が得難い場合であっても、上記面取状部で掛かり代を確保することができ、それだけ、ころの脱落の問題を生じることなく、低断面化を図ることができる。また、掛かり代の確保が容易であるため、ころところ止め部との遊隙量を確保して円滑な潤滑を図ることができる。 In this invention, you may provide a chamfered part in the location which the outer-diameter surface of the said roller of each roller stopper part of the said holder | retainer contacts.
If the chamfered portion is provided, the roller can be allowed to enter the chamfered portion, and the roller allowance for the roller stopper can be increased. For this reason, when the cage cross-section is lowered, the roller stoppers on both sides cannot be positioned far from the center of the roller, and it is difficult to obtain the allowance for part of the roller's circumferential surface to enter between the roller stoppers on both sides. Even so, the chamfered portion can be secured by the chamfered portion, and accordingly, the cross section can be reduced without causing the problem of the roller falling off. In addition, since it is easy to secure the allowance, it is possible to ensure smooth lubrication by securing the amount of clearance with the stopper portion.

上記面取状部は、面押し加工部であっても良い。ここでの、面押し加工部とは、プレス型を押し付けて平坦面ないし曲面の面取り状の形状に塑性加工した部分を意味する。この面押し加工部は、テーパ面状であっても、ころの外径面に対応した断面円弧状の曲面形状、またはバニシ仕上げにより、前記底壁となる部分の厚さ方向の一部に前記ころ止め部が爪状に突出するように加工されたものであっても良い。
面押し加工によると、研削や切削等の機械加工を伴わず、塑性加工で保持器の加工が行えて、生産性に優れる。面押し加工部がテーパ面状であると、金型の形状が簡素なものとでき、断面円弧状の曲面形状、またはバニシ仕上げとすると、ころの掛かり代をより大きくすることが可能になり、一層の低断面化が図り易い。 The chamfered portion may be a chamfered portion. Here, the surface pressing portion means a portion that has been pressed into a flat surface or a curved chamfered shape by pressing a press die. Even if this surface pressing part is a tapered surface, the curved surface shape having a circular arc cross section corresponding to the outer diameter surface of the roller, or burnishing, a part of the thickness direction of the portion that becomes the bottom wall It may be processed so that the roller stopper protrudes like a nail.
According to the surface pressing, the cage can be machined by plastic working without mechanical processing such as grinding and cutting, and the productivity is excellent. If the surface pressing part is a tapered surface, the shape of the mold can be simplified, and if it is a curved surface with a circular arc cross section or burnished, it will be possible to increase the roller allowance, It is easy to further reduce the cross section.

前記保持器は、浸炭焼入れおよび焼き戻しが施されたものであっても、または浸炭窒化処理が施されたもの、あるいは軟窒化処理を施したものであっても良い。保持器のこれらの処理により、保持器の強度を向上させ、保持器の摩耗を低減することができる。
この発明のスラストころ軸受の製造方法は、この発明の上記いずれかの構成のスラストころ軸受を製造する方法であって、板状で円環状のブランク材に、前記中央溝、内径側溝、および外径側溝となる各円周溝をコイニングまたはその他の冷間鍛造により形成し、かつ前記ポケットを打ち抜き形成する方法である。 The cage may be subjected to carburizing and tempering, or may be subjected to carbonitriding or soft nitriding. These processes of the cage, to improve the strength of the cage, Ru can reduce wear of the cage.
A method of manufacturing a thrust roller bearing according to the present invention is a method of manufacturing a thrust roller bearing having any one of the above-described configurations according to the present invention, wherein the central groove, the inner diameter side groove, and the outer groove are formed on a plate-like annular blank. In this method, each circumferential groove to be a radial groove is formed by coining or other cold forging, and the pocket is formed by punching.

この発明のスラスト針状ころ軸受は、前記保持器が一枚板の保持器であって、前記各ポケット間の柱部が、保持器の一方の面に設けられた中央溝と他方の面に設けられた内径側溝，外径側溝とを有し、この保持器は、板厚がころの径よりもやや薄い板状で円環状のブランク材に、前記中央溝、内径側溝、および外径側溝となる各円周溝がコイニングまたはその他の冷間鍛造により形成されて、前記中央溝、内径側溝、および外径側溝の底壁となる部分が、前記冷間鍛造により前記ブランク材から薄肉化された部分とされ、かつ前記各ポケットが形成されたものであり、前記柱部は、各溝の底壁となる前記薄肉化された部分からポケット内に突出して前記ころを抜け止めする突片状のころ止め部を有し、前記中央溝の底壁となる部分から突出するころ止め部と前記内径側溝および外径側溝の底壁となる部分から突出するころ止め部とは、互いに保持器の厚み方向における反対側位置にあって、ころをポケット内に保持器厚み方向の両方向に対して抜出不能状態に保持するものとしたため、保持器に対してころを脱落防止構造とし、かつ低断面化を図りながら、保持器強度を確保でき、変形にも強く、かつコスト高にならないものとできる。 Thrust DOO needle roller bearings of this invention is a retainer of the retainer single plate, front Symbol column portion between the pockets, the central groove and the other provided on one surface of the cage an inner diameter side groove provided on the surface, have a an outer diameter side groove, the retainer is a blank annular slightly thin plate than the diameter of the plate thickness around the central groove, the inner diameter side groove, and Each circumferential groove to be an outer diameter side groove is formed by coining or other cold forging, and the central groove, the inner diameter side groove, and a portion that becomes a bottom wall of the outer diameter side groove are formed from the blank material by the cold forging. is a thinned portion, and the are those each pocket is formed, the pillar portion, retained the rollers protrude into the thinned part know pockets ing and the bottom wall of each groove Projecting from the portion that becomes the bottom wall of the central groove The roller stopper and the roller stopper protruding from the inner wall side groove and the bottom wall of the outer diameter side groove are opposite to each other in the thickness direction of the cage, and the roller is placed in the pocket in the cage thickness direction. Since it is held in a state where it cannot be pulled out in both directions, the roller has a structure that prevents it from falling off, and the cage can be strong enough to withstand deformation while reducing the cross-section. It can be a thing that does not become.

この発明の第１の実施形態を図１ないし図８と共に説明する。図１は図３のＡ−Ａ線拡大断面図、図２は図３のＢ−Ｂ線拡大断面図、図３は保持器の部分省略平面図、図４は保持器の部分拡大平面図、図５は図２におけるＣ−Ｃ線部の拡大断面図である。
このスラスト針状ころ軸受は、ころ１および保持器２からなり、軸受設置器機（図示せず）自体が、ころ１の転動する軌道輪となるものである。保持器２は、円環状のブランク材の両面に後述する円周溝４，５，６を形成し、円周方向の複数箇所に、等間隔でポケット３を設けたものである。各ポケット３に針状のころ１が転動自在に収容されている。 A first embodiment of the present invention will be described with reference to FIGS. 1 is an enlarged sectional view taken along line AA in FIG. 3, FIG. 2 is an enlarged sectional view taken along line BB in FIG. 3, FIG. 3 is a partially omitted plan view of the cage, and FIG. FIG. 5 is an enlarged sectional view taken along line CC in FIG.
The thrust DOO needle roller bearings consists roller 1 and cage 2, a bearing installed equipment (not shown) itself, and serves as a bearing ring of the rolling of the rollers 1. The cage 2 is formed with circumferential grooves 4, 5, and 6 to be described later on both surfaces of an annular blank, and pockets 3 are provided at equal intervals in a plurality of locations in the circumferential direction. Needle-like rollers 1 are accommodated in the respective pockets 3 in a freely rollable manner.

保持器２は、板厚がころ１の径よりやや薄い板状で円環状のブランク材に、冷間塑性加工によって、一方の面に中央溝４を、この中央溝４の両側で他方の面に内径側溝５および外径側溝６をそれぞれ形成し、かつ周方向に等間隔で複数のポケット３を打抜き形成したものである。保持器２の上記冷間塑性加工は、コイニングまたはその他の冷間鍛造加工とする。保持器２は、上記冷間塑性加工、ポケット３の打ち抜きの後、あるいはさらに後述の面押し加工の後、熱処理を施し、完成品とされる。熱処理は、例えば、浸炭焼入れおよび焼き戻しとされる。上記熱処理に代え、保持器２に浸炭窒化処理を施し、または軟窒化処理を施しても良い。   The cage 2 is a plate-like and annular blank material whose thickness is slightly thinner than the diameter of the roller 1, and by cold plastic working, a central groove 4 is formed on one surface, and the other surface on both sides of the central groove 4. The inner diameter side groove 5 and the outer diameter side groove 6 are formed respectively, and a plurality of pockets 3 are punched and formed at equal intervals in the circumferential direction. The cold plastic working of the cage 2 is coining or other cold forging. The cage 2 is heat-treated after the cold plastic working, punching out the pockets 3 or after the surface pressing as described later, to be a finished product. The heat treatment is, for example, carburizing quenching and tempering. Instead of the heat treatment, the cage 2 may be subjected to carbonitriding or soft nitriding.

図３は、これら複数のポケット３の内の２個だけを抽出して描き、他のポケットの図示を省略したものである。各ポケット３の長さ方向は環状保持器２の径方向に向き、その長さ方向および幅方向寸法は、ころ１を収容し得るように、ころ１の長さおよび径よりやや大とされている。各ポケット３の間の部分が柱部７となり、この柱部７が、前記一方の面に設けられた中央溝４と、他方の面に設けられた内径側溝５および外径側溝６とを有することになる。   In FIG. 3, only two of the plurality of pockets 3 are extracted and drawn, and the other pockets are not shown. The length direction of each pocket 3 faces the radial direction of the annular cage 2, and the length direction and width direction dimensions are slightly larger than the length and diameter of the roller 1 so that the roller 1 can be accommodated. Yes. A portion between each pocket 3 becomes a pillar portion 7, and this pillar portion 7 has a central groove 4 provided on the one surface and an inner diameter side groove 5 and an outer diameter side groove 6 provided on the other surface. It will be.

柱部７は、各円周溝４，５，６の底壁４ａ，５ａ，６ａとなる薄肉化された部分から、ポケット３内に突出して前記ころ１を抜け止めする突片状のころ止め部８，９，１０を有している。各ころ止め部８、９、１０のポケット３の幅方向における対向間隔は、ころ１の径よりやや小とされる。ころ止め部８ところ止め部９、１０とは、互いに保持器２の厚み方向における反対側位置であり、かつ径方向にずれた位置となる。したがって、ころ１をこれらのころ止め部８，９，１０間に押し込むと、ころ止め部８がころ１の一方の周面に当接し、ころ止め部９，１０が他方の周面に当接することになり、ころ１は、これらころ止め部８，９，１０の規制を受けて、ポケット３内に遊嵌状態で転動自在かつ抜出不能の状態で保持されることになる。   The column portion 7 protrudes into the pocket 3 from the thinned portion that becomes the bottom wall 4a, 5a, 6a of each circumferential groove 4, 5, 6, and protrudes into the pocket 3 to prevent the roller 1 from coming off. Parts 8, 9 and 10. The opposing distance in the width direction of the pocket 3 of each of the roller stoppers 8, 9 and 10 is slightly smaller than the diameter of the roller 1. The roller stopper 8 and the stoppers 9 and 10 are positions opposite to each other in the thickness direction of the cage 2 and are shifted in the radial direction. Therefore, when the roller 1 is pushed between these roller stoppers 8, 9, and 10, the roller stopper 8 comes into contact with one peripheral surface of the roller 1, and the roller stoppers 9 and 10 come into contact with the other peripheral surface. In other words, the roller 1 is held in the pocket 3 so as to be freely rollable and unremovable in the pocket 3 under the restriction of the roller stoppers 8, 9, and 10.

図５は、ころ止め部８，９，１０を拡大して示す図である。各ころ止め部８，９，１０には、それぞれころ１の外径面が接する箇所に面取状部８ａ，９ａ，１０ａが設けられている。各面取状部８ａ，９ａ，１０ａは、面押し加工により形成されたものであり、テーパ面状に形成されている。上記面押し加工は、上記各溝４，５，６を冷間塑性加工し、ポケット３を打抜いた後に行われる。
図５のテーパ状の面取状部８ａ，９ａ，１０ａに代えて、図６または図７に示す面取状部８ａ，９ａ，１０ａ，８ｃ，９ｃ，１０ｃを面押し加工により形成しても良い。図６に示す面取状部８ａ，９ａ，１０ａは、ころ１の外径面に対応した断面円弧状の曲面形状としたものである。図７に示す面取状部８ｃ，９ｃ，１０ｃは、バニシ仕上げにより、前記底壁４ａ，５ａ，６ａとなる部分の厚さ方向の一部に、ころ止め部８，９，１０が爪状に突出するように形成したものである。
なお、図５ないし図７の各例において、面押し加工は、保持器２の厚み方向のどちらか一方の面側に施すだけでもよい。 FIG. 5 is an enlarged view of the roller stoppers 8, 9, and 10. Each of the roller stoppers 8, 9, and 10 is provided with chamfered portions 8a, 9a, and 10a at locations where the outer diameter surface of the roller 1 is in contact. Each of the chamfered portions 8a, 9a, and 10a is formed by a surface pressing process, and is formed in a tapered surface shape. The surface pressing process is performed after the grooves 4, 5 and 6 are cold plastic processed and the pockets 3 are punched out.
Instead of the tapered chamfered portions 8a, 9a, and 10a shown in FIG. 5, the chamfered portions 8a, 9a, 10a, 8c, 9c, and 10c shown in FIG. good. The chamfered portions 8 a, 9 a, and 10 a shown in FIG. 6 have a curved surface shape with an arc cross section corresponding to the outer diameter surface of the roller 1. The chamfered portions 8c, 9c, and 10c shown in FIG. 7 have claw-like roller stoppers 8, 9, and 10 on a part in the thickness direction of the portions that become the bottom walls 4a, 5a, and 6a by burnishing. It is formed so as to protrude.
In each example of FIGS. 5 to 7, the surface pressing process may be performed only on one surface side in the thickness direction of the cage 2.

この構成のスラスト針状ころ軸受は、使用機器（図示ぜず）の相対回転部分に介在するように設置される。このスラスト針状ころ軸受は、保持器２の柱部７が、一方の面に設けられた中央溝４と他方の面に設けられた内径側溝５，外径側溝６とにより、ころ中心の両側に上記各溝４〜６の底壁４ａ，５ａ，６ａとなる薄肉化部分が設けられ、これらの薄肉化された溝底壁部分４ａ，５ａ，６ａからポケット３内に突出する突片状のころ止め部８，９，１０を有するものとしたため、ポケット３内のころ１が、保持器２の表裏両面に対して脱落防止される。保持器柱部７は、上記各溝４〜６を有する形状とするが、ブランク材のコイニングまたはその他の冷間鍛造により形成されるため、曲げ加工によるものに比べて、保持器２の強度が強く、加工や処理に伴う変形が無いものとできる。これらにより、保持器２の低断面化が容易となる。
保持器２の変形については、輪郭が一枚板の保持器２であるため、プレステンパー（プレスした状態で行う焼き戻し）等による矯正も可能である。さらに、従来のＷ形（図１０）や箱形（図１１）の保持器５２，５３に比べて、プレス加工の工程が少なくて済み、安価に製造することができる。 Thrust DOO needle roller bearings of this configuration is installed so as to be interposed in the relative rotational part of the equipment used (not ze shown). The thrust DOO needle roller bearings are bar portion 7 of the cage 2, central groove provided on one surface 4 and the inner diameter side groove 5 provided on the other surface, the outer diameter side groove 6, around the center Are provided with thinned portions to be the bottom walls 4a, 5a, 6a of the grooves 4-6, and projecting pieces projecting into the pocket 3 from the thinned groove bottom wall portions 4a, 5a, 6a. Therefore, the rollers 1 in the pocket 3 are prevented from falling off from both the front and back surfaces of the cage 2. The cage column 7 has a shape having the grooves 4 to 6, but is formed by blanking coining or other cold forging, so that the strength of the cage 2 is higher than that by bending. It is strong and can be free from deformation associated with processing and processing. These facilitate the reduction of the cross section of the cage 2.
About the deformation | transformation of the holder | retainer 2, since the outline is the holder | retainer 2 of a single board, correction | amendment by press temper (tempering performed in the pressed state) etc. is also possible. Further, compared with the conventional W-shaped (FIG. 10) and box-shaped (FIG. 11) cages 52 and 53, the number of press working steps is small, and it can be manufactured at low cost.

また図５に示すように、各ころ止め部８〜１０のころ１の外径面が接する箇所には面取状部８ａ〜１０ａを設けたため、その面取状部８ａ〜１０ａにころ１を進入させることができて、ころ止め部８〜１０に対するころ１の掛かり代を大きくできる。そのため、保持器２の低断面化によって両側のころ止め部８〜１０が、ころ中心からあまり離れた位置とできず、表裏両側のころ止め部８〜１０間にころ１の周面の一部を進入させる掛かり代が得難い場合であっても、上記面取状部８ａ〜１０ａで掛かり代を確保することができる。そのため、ころ１の脱落の問題を生じることなく、低断面化を図ることができる。また、掛かり代の確保が容易であるため、ころ１ところ止め部８〜１０との遊隙量を確保して円滑な潤滑を図ることができる。   Further, as shown in FIG. 5, since chamfered portions 8a to 10a are provided at locations where the outer diameter surfaces of the rollers 1 of the respective roller stoppers 8 to 10 are in contact, the rollers 1 are placed on the chamfered portions 8a to 10a. It can be made to enter, and the engagement cost of the roller 1 with respect to the roller stoppers 8 to 10 can be increased. Therefore, the roller stoppers 8 to 10 on both sides cannot be positioned so far from the roller center due to the reduction in the cross section of the cage 2, and a part of the circumferential surface of the roller 1 between the roller stoppers 8 to 10 on both sides of the front and back sides. Even if it is difficult to obtain the allowance for entering, the allowance can be secured by the chamfered portions 8a to 10a. Therefore, it is possible to reduce the cross section without causing the problem of the roller 1 falling off. In addition, since it is easy to secure the allowance, it is possible to ensure a smooth amount of lubrication by securing an amount of clearance with the stoppers 8 to 10 at one place.

上記面取状部８〜１０は、面押し加工部としたため、研削や切削等の機械加工を伴わず、塑性加工で保持器の加工が行えて、生産性に優れる。この面取状部８〜１０を図５の例のようにテーパ面状の面取状部８ａ〜１０ａとした場合は、金型の形状が簡素なものとできる。図６の例のように断面円弧状の面取状部８ｂ〜１０ｂや、図７の例のようなバニシ仕上げの面取状部８ｂ〜１０ｂとした場合は、ころ１の掛かり代をより大きくすることが可能になり、一層の低断面化が図り易い。   Since the chamfered portions 8 to 10 are chamfered portions, the cage can be machined by plastic working without mechanical processing such as grinding or cutting, and the productivity is excellent. When the chamfered portions 8 to 10 are tapered chamfered portions 8a to 10a as in the example of FIG. 5, the shape of the mold can be simplified. When the chamfered portions 8b to 10b having an arc cross section as in the example of FIG. 6 or the burnished chamfered portions 8b to 10b as in the example of FIG. Therefore, it is easy to further reduce the cross section.

なお、前記実施形態は、ころ１および保持器２からなる軌道輪省略型の軸受、いわゆる保持器付きころ型のスラスト針状ころ軸受とした場合につき説明したが、この発明は、ころ１を転動させる両側または片側の軌道輪を有するスラスト針状ころ軸受にも適用することができる。図９はその一例を示し、一対の対面する軌道輪１１，１２の間に、保持器２に保持されたころ１を介在させたものである。片方の軌道輪１１は内輪となるものであり、環状の平板状部１１ａと、その内径縁から保持器対向面側に突出した内鍔部１１ｂよりなる。もう片方の軌道輪１２は外輪となるものであり、平板状部１２ａとその外径縁から保持器対向面側に突出した外鍔部１２ｂとよりなる。 Incidentally, the above embodiment, the rollers 1 and consists of the retainer 2 raceway shorthand bearings, has been explained the case where the thrust preparative needle roller bearings of the type roller and a so-called cage, the present invention is around 1 it can be applied to thrust preparative needle roller bearings having one or both sides of the bearing ring to roll. FIG. 9 shows an example, in which a roller 1 held by a cage 2 is interposed between a pair of facing races 11 and 12. One of the race rings 11 is an inner ring, and includes an annular flat plate portion 11a and an inner flange portion 11b protruding from the inner diameter edge toward the cage facing surface. The other race ring 12 is an outer ring, and is composed of a flat plate-like portion 12a and an outer flange portion 12b protruding from the outer diameter edge to the cage facing surface side.

なお、上記実施形態における保持器２，ポケット３，円周溝４，５，６およびころ止め部８，９，１０等の形状は、図例のものに限定されず他の形状のものも採用可能である。例えば、円周溝４，５，６は、断面が台形状のものであっても良い。   In addition, the shape of the cage 2, the pocket 3, the circumferential grooves 4, 5, 6 and the roller stoppers 8, 9, 10 and the like in the above embodiment is not limited to the illustrated example, and other shapes are also adopted. Is possible. For example, the circumferential grooves 4, 5, 6 may have a trapezoidal cross section.

この発明の一実施形態にかかるスラスト針状ころ軸受のポケット形成部分の部分断面図である。It is a partial cross-sectional view of the pocket forming portion of the thrust preparative needle roller bearings according to an embodiment of the present invention. 同スラスト針状ころ軸受における柱部の部分断面図である。It is a partial cross-sectional view of a pillar portion of the thrust preparative needle roller bearings. 保持器の部分省略平面図である。It is a partial abbreviation top view of a cage. 保持器の部分拡大平面図である。It is a partial enlarged plan view of a cage. 図２におけるＣ−Ｃ線部の拡大断面図である。It is an expanded sectional view of the CC line part in FIG. 同変形例の拡大断面図である。It is an expanded sectional view of the modification. 同他の変形例の拡大断面図である。It is an expanded sectional view of the other modification. 保持器の部分斜視図である。It is a fragmentary perspective view of a holder | retainer. 他の実施形態の部分断面図である。It is a fragmentary sectional view of other embodiments. 従来例の部分断面図である。It is a fragmentary sectional view of a prior art example. 他の従来例の部分断面図である。It is a fragmentary sectional view of other conventional examples.

符号の説明Explanation of symbols

１…ころ
２…保持器
３…ポケット
４…中央溝
４ａ…中央溝の底壁
５…内径側溝
５ａ…内径側溝の底壁
６…外径側溝
６ａ…内径側溝の底壁
７…柱部
８，９，１０…ころ止め部
８ａ，８ｂ，８ｃ…面取状部
９ａ，９ｂ，９ｃ…面取状部
１０ａ，１０ｂ，１０ｃ…面取状部 DESCRIPTION OF SYMBOLS 1 ... Roller 2 ... Cage 3 ... Pocket 4 ... Central groove 4a ... Bottom wall 5 of central groove ... Inner diameter side groove 5a ... Bottom wall 6 of inner diameter side groove ... Outer diameter side groove 6a ... Bottom wall 7 of inner diameter side groove ... Column 8 9, 10 ... Roller stoppers 8a, 8b, 8c ... Chamfered parts 9a, 9b, 9c ... Chamfered parts 10a, 10b, 10c ... Chamfered parts

Claims (9)

針状のころおよび保持器を備え、前記保持器は板状で円環状に形成されて円周方向の複数箇所にポケットを有し、前記各ポケットにころを転動自在に収容したスラスト針状ころ軸受において、
前記保持器は一枚板の保持器であって、前記各ポケット間の柱部が、この柱部の中央で保持器の一方の面に設けられた中央溝とこの中央溝の両側で保持器の他方の面に設けられた内径側溝および外径側溝とを有し、この保持器は、板厚がころの径よりもやや薄い板状で円環状のブランク材に、前記中央溝、内径側溝、および外径側溝となる各円周溝がコイニングまたはその他の冷間鍛造により形成されて、前記中央溝、内径側溝、および外径側溝の底壁となる部分が、前記冷間鍛造により前記ブランク材から薄肉化された部分とされ、かつ前記各ポケットが形成されたものであり、前記柱部は、各溝の底壁となる前記薄肉化された部分からポケット内に突出して前記ころを抜け止めする突片状のころ止め部を有し、前記中央溝の底壁となる部分から突出するころ止め部と前記内径側溝および外径側溝の底壁となる部分から突出するころ止め部とは、互いに保持器の厚み方向における反対側位置にあって、ころをポケット内に保持器厚み方向の両方向に対して抜出不能状態に保持するものとしたことを特徴とするスラスト針状ころ軸受。 Comprising a needle-like this Rooyobi retainer, said retainer comprises a pocket in a plurality of positions in the circumferential direction is formed in an annular plate-like, thrust bets accommodating rollably the rollers to the each pocket Te needle roller bearings smell,
It said retainer is a retainer of the single plate, front Symbol column portion between the pockets, holding a central in the central groove provided in one surface of the cage of the column portion at both sides of the central groove It possesses the other inner diameter side groove provided on a surface and the outer diameter groove of vessels, the cage, the blank of the annularly somewhat thin plate than the diameter of the plate thickness around the central groove, the inner diameter The circumferential grooves that form the side grooves and the outer diameter side grooves are formed by coining or other cold forging, and the central grooves, the inner diameter side grooves, and the portions that become the bottom walls of the outer diameter side grooves are formed by the cold forging. is a thinned portion from the blank, and wherein are those each pocket is formed, the pillar portion, the rollers protrude into the thinned part know pockets ing and the bottom wall of each groove A portion that has a protruding piece-shaped roller stopper for preventing the center groove and serves as a bottom wall of the central groove The roller stoppers protruding from the roller stopper and the roller stoppers protruding from the bottom wall portions of the inner diameter side groove and the outer diameter side groove are opposite to each other in the thickness direction of the cage, and the rollers are held in the pockets. thrust DOO needle roller bearings, characterized in that the shall keep the extraction impossible state in the thickness direction of both. 請求項１において、前記保持器の各ころ止め部の前記ころの外径面が接する箇所に、面取状部を設けたスラスト針状ころ軸受。 In claim 1, the outer surface is in contact points of the rollers of each roller stoppers of said retainer, thrust preparative needle roller bearings having a chamfered shape portion. 請求項２において、前記面取状部が、面押し加工部であるスラスト針状ころ軸受。 According to claim 2, wherein the chamfer-shaped portion, the flattened thrust preparative needle roller bearings are processed portion. 請求項３において、前記面押し加工部が、テーパ面状であるスラスト針状ころ軸受。 In claim 3, the processing unit press the surface, thrust preparative needle roller bearings are tapered surface. 請求項３において、前記面押し加工部が、ころの外径面に対応した断面円弧状の曲面形状であるスラスト針状ころ軸受。 According to claim 3, thrust preparative needle roller bearings processing unit press the surface, a cross-sectional arcuate curved shape corresponding to the outer diameter surface of the roller. 請求項３において、前記面押し加工部が、バニシ仕上げにより、前記底壁となる部分の厚さ方向の一部に前記ころ止め部が爪状に突出するように加工されたものであるスラスト針状ころ軸受。 In claim 3, the processing unit press the surface by burnishing, the roller stoppers in a portion of the thickness direction of the portion serving as the bottom wall is one that has been processed so as to protrude into the claw-like thrust DOO needle roller bearings. 請求項１ないし請求項６のいずれか１項において、前記保持器が、浸炭焼入れおよび焼き戻しが施され、または浸炭窒化処理が施されたものであるスラスト針状ころ軸受。 In any one of claims 1 to 6, wherein the retainer is carburized and tempered is subjected or thrust preparative needle roller bearings in which carbonitriding has been performed. 請求項１ないし請求項６のいずれか１項において、前記保持器が、軟窒化処理を施したものである針状スラストころ軸受。 In any one of claims 1 to 6, wherein the retainer, der Ru needle scan last roller bearing that has been subjected to soft nitriding. 請求項１ないし請求項８のいずれか１項に記載のスラストころ軸受を製造する方法であって、板厚がころの径よりもやや薄い板状で円環状のブランク材に、前記中央溝、内径側溝、および外径側溝となる各円周溝をコイニングまたはその他の冷間鍛造により形成し、かつ前記ポケットを打ち抜き形成するスラスト針状ころ軸受の製造方法。 A method for producing the thrust roller bearing according to any one of claims 1 to 8, wherein the central groove is formed in a plate- like and annular blank member having a plate thickness slightly thinner than the diameter of the roller . an inner diameter side groove, and each circumferential groove as a radially outer groove formed by forging coining or other cold and thrust preparative needle roller bearings manufacturing method of forming punching the pockets.
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JP4497114B2 (en) * 2006-03-17 2010-07-07 株式会社ジェイテクト Thrust roller bearing
JP5464821B2 (en) * 2008-05-08 2014-04-09 Ｎｔｎ株式会社 Roller bearing cage, roller bearing and roller bearing cage manufacturing method

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JPS53123745A (en) * 1977-04-04 1978-10-28 Ntn Toyo Bearing Co Ltd Manufacturing method of equal speed universal joint carrier use material
JP2000192965A (en) * 1998-12-24 2000-07-11 Ntn Corp Thrust needle-like roller bearing
JP2002295485A (en) * 2001-03-28 2002-10-09 Ntn Corp Shell-shaped bearing and manufacturing method therefor
JP2004156548A (en) * 2002-11-07 2004-06-03 Ntn Corp Supporting structure for receiving thrust load of compressor and thrust needle roller bearing

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Publication number Priority date Publication date Assignee Title
JPS6449710A (en) * 1987-08-18 1989-02-27 Nachi Fujikoshi Corp Retainer for guiding ball for direct-acting bearing and manufacture thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53123745A (en) * 1977-04-04 1978-10-28 Ntn Toyo Bearing Co Ltd Manufacturing method of equal speed universal joint carrier use material
JP2000192965A (en) * 1998-12-24 2000-07-11 Ntn Corp Thrust needle-like roller bearing
JP2002295485A (en) * 2001-03-28 2002-10-09 Ntn Corp Shell-shaped bearing and manufacturing method therefor
JP2004156548A (en) * 2002-11-07 2004-06-03 Ntn Corp Supporting structure for receiving thrust load of compressor and thrust needle roller bearing

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