JP2005195143A - Needle roller bearing - Google Patents

Needle roller bearing Download PDF

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Publication number
JP2005195143A
JP2005195143A JP2004004225A JP2004004225A JP2005195143A JP 2005195143 A JP2005195143 A JP 2005195143A JP 2004004225 A JP2004004225 A JP 2004004225A JP 2004004225 A JP2004004225 A JP 2004004225A JP 2005195143 A JP2005195143 A JP 2005195143A
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Prior art keywords
cage
needle roller
pocket
needle
roller
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JP2004004225A
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Japanese (ja)
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Kenichi Hashimoto
健一 橋本
Yoshitaka Waseda
義孝 早稲田
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Priority to JP2004004225A priority Critical patent/JP2005195143A/en
Publication of JP2005195143A publication Critical patent/JP2005195143A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/466—Needle bearings with one row or needles comprising needle rollers and an outer ring, i.e. subunit without inner ring

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve the assembling ability of needle rollers by reducing the interference of needle rollers with a retainer regardless of the thickness of the retainer. <P>SOLUTION: A retainer 5 manufactured by welding both end portions of a strip of base material 8 having a plurality of pockets 7 is arranged on the inner peripheral side of an outer race 2. Roller guide surfaces 7a, 7a of the respective pockets 7 are opposed to each other in the peripheral direction of the retainer and are formed so as to be tapered surfaces having the inside width narrower than the outside width. The needle rollers 3 are received in the pockets 7 by being pushed from the radially inside direction of the retainer 5. In addition, chamfered portions 11 are formed on the inside of the roller guide surfaces 7a, 7a of the pockets 7 by leaving the opposed interval X in the peripheral direction smaller than the diameter of the needle roller 3 in order to prevent the falling-off of the needle rollers 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、例えば、自動車や、その他各種の産業機械に使用される針状ころ軸受に関する。   The present invention relates to a needle roller bearing used in, for example, automobiles and other various industrial machines.

従来の針状ころ軸受は、外輪の内部に、複数の矩形窓形のポケットを有する環状の保持器が組み込まれ、各ポケット内に収容された針状ころが、ポケットの周方向端面に案内されつつ外輪の転動面を転動するものである。   In conventional needle roller bearings, an annular cage having a plurality of rectangular window-shaped pockets is incorporated in the outer ring, and the needle rollers accommodated in the pockets are guided to the circumferential end surfaces of the pockets. While rolling the rolling surface of the outer ring.

保持器は、溶接保持器が採用されている。かかる溶接保持器は、帯状鋼材にプレスでポケットを打ち抜くと共に帯状鋼材を所定長さ切断し、所定形状の帯状鋼材を環状に曲げた状態でその両端部を溶接することによって製作される。溶接保持器は、削り加工による保持器と比較して製造が簡易で、低コスト化が図れるので、種々の針状ころ軸受に採用されている（例えば、特許文献１参照。）。
特開２０００−２７４４３９号公報 A welded cage is used as the cage. Such a welded cage is manufactured by punching a pocket into a strip-shaped steel material, cutting the strip-shaped steel material to a predetermined length, and welding both ends of the strip-shaped steel material in a state of being bent into an annular shape. Since the welded cage is simpler to manufacture and can be manufactured at a lower cost compared to a cage by shaving, it is used in various needle roller bearings (see, for example, Patent Document 1).
JP 2000-274439 A

図９に示す如く、溶接保持器５１は、帯状鋼材にポケット５２を形成した後で、当該帯状鋼材を環状に曲げてその両端部を溶接するものであるため、ポケット５２の保持器周方向のころ案内面５２ａ、５２ａは、内径側が外径側よりも狭くなったテーパー面となる。   As shown in FIG. 9, the welded cage 51 is formed by forming the pocket 52 in the strip-shaped steel material, and then bending the strip-shaped steel material in an annular shape to weld both ends thereof. The roller guide surfaces 52a and 52a are tapered surfaces whose inner diameter side is narrower than the outer diameter side.

軸受の組み付けに際しては、保持器５１を外輪５３の内周側に配置した後に、この保持器５１の径方向内方側からポケット５２内部に針状ころ５０を押し込んで組み込む。ポケット５２のころ案内面５２ａ、５２ａの間隔は、組み込まれた針状ころ５０の直径ｄよりも小さく設定され、針状ころ５０の抜け止めがなされている。   In assembling the bearing, after the cage 51 is arranged on the inner peripheral side of the outer ring 53, the needle rollers 50 are pushed into the pocket 52 from the radially inner side of the cage 51 and assembled. The interval between the roller guide surfaces 52a and 52a of the pocket 52 is set smaller than the diameter d of the needle roller 50 incorporated, and the needle roller 50 is prevented from coming off.

しかしながら、ポケット５２のころ案内面５２ａ、５２ａは、径方向内外にわたって直線状のテーパー面となっていることから、ころ案内面５２ａ、５２ａ間の最小間隔Ｘ０となっている最内径部のしめしろが大きくなり、針状ころ５０を保持器５１のポケット５２内に押し込む際に、針状ころ５０がポケット５２内に入り難く、針状ころ５０の組み込み性能が低下する問題があった。特に、保持器５１の板厚が厚い程、かかる問題が顕著になる傾向にあった。   However, since the roller guide surfaces 52a and 52a of the pocket 52 are linearly tapered surfaces extending inward and outward in the radial direction, the interference of the innermost diameter portion having the minimum distance X0 between the roller guide surfaces 52a and 52a. When the needle roller 50 is pushed into the pocket 52 of the retainer 51, the needle roller 50 is difficult to enter the pocket 52, and there is a problem that the assembling performance of the needle roller 50 is lowered. In particular, this problem tends to become more prominent as the cage 51 is thicker.

本発明は、保持器の板厚に関係なく、針状ころの保持器に対するしめしろを小さくして、針状ころの組み込み性を向上させることを課題とする。   An object of the present invention is to reduce the interference of the needle rollers with respect to the cage regardless of the plate thickness of the cage and to improve the assemblability of the needle rollers.

本発明による針状ころ軸受は、外輪の内周側に、複数のポケットを有する帯状基材の両端部を溶接してなる保持器を組み込み、各ポケットの保持器周方向に対向するころ案内面を、内径側に向けて幅狭となるテーパー面に形成してなり、保持器の径方向内方から針状ころをポケット内に押し入れるとともに上記ころ案内面で針状ころを抜け止めしている針状ころ軸受において、ポケットのころ案内面の内径側に面取部を形成したことを特徴とするものである。   The needle roller bearing according to the present invention incorporates a cage formed by welding both ends of a belt-like base material having a plurality of pockets on the inner circumferential side of the outer ring, and the roller guide surfaces facing each cage circumferential direction of each pocket. Is formed in a tapered surface that becomes narrower toward the inner diameter side, and the needle roller is pushed into the pocket from the radially inner side of the cage and the needle roller is prevented from coming off by the roller guide surface. In the present needle roller bearing, a chamfered portion is formed on the inner diameter side of the roller guide surface of the pocket.

そして、ポケットのころ案内面の最も間隔の小さくなる内径部に、面取部を形成しているので、針状ころのしめしろを小さくでき、針状ころをポケット内に入れ易くなる。なお、面取部は、ポケットのころ案内面の両方に形成しても、あるいは、何れか一方に形成してもよい。   Since the chamfered portion is formed in the inner diameter portion where the interval between the roller guide surfaces of the pocket is the smallest, the interference between the needle rollers can be reduced, and the needle rollers can be easily placed in the pocket. The chamfered portion may be formed on both of the roller guide surfaces of the pocket, or may be formed on either one.

本発明の針状ころ軸受によれば、針状ころを容易かつ迅速に保持器に組み込め、組み込み性が向上する。   According to the needle roller bearing of the present invention, the needle roller can be easily and quickly incorporated into the cage, and the assemblability is improved.

以下、図面を参照して本発明を実施するための最良の形態に係る針状ころ軸受を説明する。図１および図２は共に針状ころ軸受の要部を示す断面図、図３は針状ころ軸受の半裁断面図、図４は図３のＡ−Ａ線矢視断面図である。図５は保持器の帯状基材の一部の平面図である。   Hereinafter, a needle roller bearing according to the best mode for carrying out the present invention will be described with reference to the drawings. FIGS. 1 and 2 are cross-sectional views showing the main part of the needle roller bearing, FIG. 3 is a half-cut cross-sectional view of the needle roller bearing, and FIG. 4 is a cross-sectional view taken along the line AA in FIG. FIG. 5 is a plan view of a part of the belt-like base material of the cage.

図３および図４において、１は針状ころ軸受を示し、この針状ころ軸受１は、外輪２と、複数の針状ころ３と、保持器５とから構成された、例えばシェル形針状ころ軸受である。   3 and 4, reference numeral 1 denotes a needle roller bearing. The needle roller bearing 1 is composed of an outer ring 2, a plurality of needle rollers 3, and a cage 5, for example, a shell-shaped needle shape. It is a roller bearing.

外輪２はその内周面に軌道部４を、また、軌道部４の両端側に軸方向内向きに屈曲された環状の鍔部６、６をそれぞれ有する。保持器５は、図５に示す金属からなる帯状基材８の両端同士を溶接することにより、環状に形成された溶接保持器である。保持器５の外径Ｄ１は、鍔部６、６の内径Ｄ２よりも、若干、小さく設定されている。保持器５の軸方向幅は、外輪２の軸方向幅よりも小さく形成され、かつ、鍔部６、６の軸方向内端６ａ、６ａの軸方向対向距離よりも大きく設定されている。   The outer ring 2 has a track portion 4 on its inner peripheral surface, and annular flange portions 6 and 6 bent inward in the axial direction on both ends of the track portion 4, respectively. The cage 5 is a welded cage formed in an annular shape by welding both ends of a band-shaped substrate 8 made of metal shown in FIG. The outer diameter D1 of the cage 5 is set slightly smaller than the inner diameter D2 of the flange portions 6 and 6. The axial width of the cage 5 is formed to be smaller than the axial width of the outer ring 2 and is set to be larger than the axial facing distance of the axial inner ends 6a and 6a of the flange portions 6 and 6.

保持器５には、その円周等間隔に複数のポケット７が、内外に貫通して形成されている。各ポケット７は、溶接前の帯状鋼材からなる帯状基材８を打ち抜いて形成されもので、図５に示す形状を有している。具体的には、各ポケット７の軸方向の幅長Ｗ１は、針状ころ３の軸方向の長さＬよりも大きく設定されている。また、ポケット７の保持器周方向（帯状基材の長手方向）には、一対の案内突部９、９が周方向で対向するように形成されている。この案内突部９、９は、ポケット７の軸方向両側に不連続に設けられ、対向する案内突部９、９のころ案内面７ａ、７ａ間の周方向対向幅Ｗ２は、案内突部９、９が設けられていない対向面７ｂ、７ｂ間の周方向対向幅Ｗ３よりも小さくなっている。   The cage 5 is formed with a plurality of pockets 7 penetrating inward and outward at equal intervals around the circumference. Each pocket 7 is formed by punching a band-shaped base material 8 made of a band-shaped steel material before welding, and has a shape shown in FIG. Specifically, the axial width W 1 of each pocket 7 is set to be larger than the axial length L of the needle rollers 3. A pair of guide protrusions 9 and 9 are formed in the circumferential direction of the cage 7 in the circumferential direction of the cage (longitudinal direction of the belt-like base material). The guide protrusions 9 and 9 are discontinuously provided on both sides in the axial direction of the pocket 7, and the circumferentially facing width W2 between the roller guide surfaces 7 a and 7 a of the opposing guide protrusions 9 and 9 is determined by the guide protrusion 9. , 9 is smaller than the circumferential facing width W3 between the facing surfaces 7b, 7b.

互いに対向する案内突部９、９のころ案内面７ａ、７ａは、図１に示す如く内径側に向けて互いの周方向対向幅が小さくなる第１テーパー面１０、１０と、この第１テーパー面１０の内径端から内径側に向けて互いの周方向対向幅が大きくなる面取部としての第２テーパー面１１、１１とからなる。第１テーパー面１０、１０と第２テーパー面１１、１１とが接続する部分は突部１３，１３となっており、両突部１３，１３の周方向対向間隔Ｘは、ころ案内面７ａ、７ａにおいて最小となっており、しかも、その間隔Ｘは、針状ころ３の直径Ｄよりも小さく設定されている。   The roller guide surfaces 7a and 7a of the guide projections 9 and 9 that face each other include first tapered surfaces 10 and 10 that have a circumferentially opposed width that decreases toward the inner diameter side as shown in FIG. It consists of the 2nd taper surfaces 11 and 11 as a chamfer part from which the mutual circumferential direction opposing width | variety becomes large toward the inner diameter side from the inner diameter end of the surface 10. The portions where the first taper surfaces 10 and 10 and the second taper surfaces 11 and 11 are connected are protrusions 13 and 13, and the circumferential facing distance X between the protrusions 13 and 13 is the roller guide surface 7a, The distance X is the smallest in 7a, and the interval X is set smaller than the diameter D of the needle rollers 3.

第１テーパー面１０は、保持器５の板厚方向に形成されかつ帯状基材８を環状にすることにより傾斜状に形成される。第２テーパー面１１は、面取により形成されている。面取角度αは、径方向に対して１０°〜４５°の範囲に設定されている。好ましくは、略３０°に設定されている。   The first taper surface 10 is formed in an inclined shape by being formed in the plate thickness direction of the cage 5 and by making the belt-like substrate 8 annular. The second tapered surface 11 is formed by chamfering. The chamfer angle α is set in a range of 10 ° to 45 ° with respect to the radial direction. Preferably, it is set to approximately 30 °.

また、案内突部９、９が設けられていない対向面７ｂ、７ｂ間の周方向対向幅Ｗ３は、図２に示す如くテーパー状の対向面７ｂ、７ｂの内径側の周方向対向間隔Ｘ１が、針状ころ３の直径ｄよりも大きくなるように設定されている。また、保持器５の外径Ｄ１は、針状ころ３それぞれの中心Ｏを結ぶ円の直径（ＰＣＤ）と同一あるいはそれよりも小さく設定されている。従って、外輪２の鍔部６、６の軸方向内端６ａ、６ａが、針状ころ３の両端の略中心を案内でき、針状ころ３を安定させることができる。   Further, the circumferential facing width W3 between the facing surfaces 7b and 7b where the guide protrusions 9 and 9 are not provided is the circumferential facing distance X1 on the inner diameter side of the tapered facing surfaces 7b and 7b as shown in FIG. The diameter d of the needle roller 3 is set to be larger. The outer diameter D1 of the cage 5 is set to be equal to or smaller than the diameter (PCD) of the circle connecting the centers O of the needle rollers 3. Accordingly, the axial inner ends 6a, 6a of the flange portions 6, 6 of the outer ring 2 can guide the approximate centers of both ends of the needle roller 3, and the needle roller 3 can be stabilized.

以上の構成を有するころ軸受１の製造方法を説明する。保持器５の製造に際しては、先ず、図６に示す如く帯状基材８に対して垂直（図６の上下方向）にパンチ１５で打ち抜く。なお、図６において、帯状基材８の上面側が、保持器５の内周面側となる。かかるパンチ１５は、打ち抜き部１５ａと面取部１５ｂとを備え、１工程でポケット７を打ち抜く。この打ち抜き工程と同時か、または別工程で帯状基材８を適宜所定の形状に切断する。   A method for manufacturing the roller bearing 1 having the above configuration will be described. When manufacturing the cage 5, first, as shown in FIG. 6, the punch 15 is punched perpendicularly (vertical direction in FIG. 6) with respect to the belt-like substrate 8. In FIG. 6, the upper surface side of the belt-like substrate 8 is the inner peripheral surface side of the cage 5. The punch 15 includes a punched portion 15a and a chamfered portion 15b, and punches the pocket 7 in one step. Simultaneously with this punching process or in a separate process, the belt-like substrate 8 is appropriately cut into a predetermined shape.

そして、帯状基材８を環状に形成した際に、打ち抜き部１５ａで打ち抜かれた対向面が、案内突部９、９の第１テーパー面１０、１０となり、面取部１５ｂで面取りされた傾斜面が、第２テーパー面１１、１１となり、案内突部９、９のころ案内面７ａ、７ａの内径部に、針状ころ３の直径ｄよりも小さな間隔Ｘを残して第２テーパー面１１、１１が形成されることとなる。   Then, when the belt-like substrate 8 is formed in an annular shape, the opposing surface punched out by the punched portion 15a becomes the first tapered surfaces 10 and 10 of the guide protrusions 9 and 9, and the slope chamfered by the chamfered portion 15b The surfaces become the second tapered surfaces 11, 11, and the second tapered surface 11 leaves a gap X smaller than the diameter d of the needle roller 3 at the inner diameter portion of the roller guide surfaces 7 a, 7 a of the guide protrusions 9, 9. 11 are formed.

また、外輪２の両端に鍔部６、６を予め形成し、熱処理を施して所定の硬度を付与し、それから、外輪２に保持器５を軸方向から組み込む。   In addition, the flanges 6 and 6 are formed in advance at both ends of the outer ring 2 and heat treatment is performed to give a predetermined hardness.

次に、各針状ころ３を保持器５の径方向内方から各ポケット７それぞれに組み込む。針状ころ３をポケット７に押し込む際に、針状ころ３は、第２テーパー面１１、１１に案内されるため、針状ころ３をポケット７に容易に位置させることができる。しかも、ポケット７の案内突部９、９は、面取りがされていない従来のものに比し、押し込み幅を大きく（針状ころ３とのしめ代を小さく）できるので、ポケット７に針状ころ３を容易に押し込んで組み込むことができる。これによって、複数の針状ころ３をポケット７に組み込む作業を容易かつ迅速に行うことができ、作業性が向上する。しかも、針状ころ３は組み込まれたポケット７の案内突部９、９の縁部または案内面（第１テーパー面１０、１０または突部１３，１３）に係止するため、不用意に抜け出て脱落するおそれはない。   Next, each needle roller 3 is assembled into each pocket 7 from the inside in the radial direction of the cage 5. When the needle roller 3 is pushed into the pocket 7, the needle roller 3 is guided by the second tapered surfaces 11, 11, so that the needle roller 3 can be easily positioned in the pocket 7. Moreover, the guide protrusions 9 and 9 of the pocket 7 can have a larger pushing width (smaller interference with the needle roller 3) than the conventional one that is not chamfered. 3 can be easily pushed in and incorporated. Thereby, the operation | work which incorporates the some needle roller 3 in the pocket 7 can be performed easily and rapidly, and workability | operativity improves. Moreover, since the needle roller 3 is locked to the edge or guide surface (the first tapered surface 10, 10 or the protrusions 13, 13) of the guide protrusions 9 and 9 of the pocket 7 incorporated, it comes out carelessly. There is no risk of falling off.

以上のようにして製造したころ軸受１は、図３および図４に示す如く軸１８を挿通し、この軸１８の外周面を針状ころ３の内輪軌道面として使用する。   In the roller bearing 1 manufactured as described above, the shaft 18 is inserted as shown in FIGS. 3 and 4, and the outer peripheral surface of the shaft 18 is used as the inner ring raceway surface of the needle roller 3.

本実施の形態の針状ころ軸受１は、保持器５のポケット７の案内面７ａ、７ａに、適宜大きさの面取りを施すことにより、針状ころ３とのしめ代を調整でき、保持器５は、帯状基材８の板厚を薄くしなくても、板厚の厚いものであっても、針状ころ３の組み込み性の向上を図れると共に、保持器５の強度も確保できる。また、例えば、ころの本数が少なく、保持器５の直径が小さいためにポケット７のころ案内面のテーパー角度が大きい条件であっても、溶接保持器を採用でき、かかる保持器の適用可能範囲の拡大を図ることができる。   The needle roller bearing 1 according to the present embodiment can adjust the interference with the needle roller 3 by chamfering the guide surfaces 7a and 7a of the pocket 7 of the cage 5 with appropriate sizes, so that the cage can be adjusted. No. 5 can improve the assemblability of the needle rollers 3 and ensure the strength of the cage 5 even if the belt-like base material 8 is not thin or thick. In addition, for example, a welded cage can be used even under conditions where the roller guide surface of the pocket 7 has a large taper angle because the number of rollers is small and the cage 5 has a small diameter. Can be expanded.

本発明は、前記実施の形態に限定されるものではなく、例えば、図７に示す如く打ち抜き用パンチ１５ｃと面取り用パンチ１５ｄとを使用して、２工程で帯状基材８にポケット７を形成することも可能である。   The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 7, the punch 7c for punching and the chamfering punch 15d are used to form the pocket 7 in the belt-like substrate 8 in two steps. It is also possible to do.

また、保持器５のポケット７の面取りは、旋削加工により形成してもよく、また、ポケットを打ち抜いた際に破断面が生じる場合には、かかる破断面を利用することもできる。   Further, the chamfering of the pocket 7 of the cage 5 may be formed by turning, and when a fracture surface is generated when the pocket is punched out, the fracture surface can be used.

また、外輪２は、図８に示す如くソリッド形タイプのものであってもよい。なお、他の構成は、前記実施の形態と同様であるので、同一の符号を付してその説明を省略する。   The outer ring 2 may be of a solid type as shown in FIG. Since other configurations are the same as those of the above-described embodiment, the same reference numerals are given and description thereof is omitted.

本発明の一実施形態を示し、図３のＡ−Ａ線矢視の要部断面図FIG. 3 shows an embodiment of the present invention and is a cross-sectional view of an essential part taken along line AA in FIG. 本発明の一実施形態を示し、図３のＢ−Ｂ線矢視の要部断面図The principal part sectional drawing of the BB line arrow of Drawing 3 showing one embodiment of the present invention 本発明の一実施形態の半裁断面図Sectional sectional view of one embodiment of the present invention 図３のＡ−Ａ線矢視断面図3 is a cross-sectional view taken along line AA in FIG. 本発明の一実施形態に係る帯状基材の一部を示す平面図The top view which shows a part of strip | belt-shaped base material which concerns on one Embodiment of this invention. 同帯状基材にポケットを形成する工程を示す断面図Sectional drawing which shows the process of forming a pocket in the strip | belt-shaped base material 同帯状基材にポケットを形成する他の工程を示す断面図Sectional drawing which shows the other process of forming a pocket in the belt-shaped base material 本発明の他の実施形態を示す半裁断面図Half-cut sectional view showing another embodiment of the present invention 従来例を示す断面図Sectional view showing a conventional example

符号の説明Explanation of symbols

１ 針状ころ軸受
２ 外輪
３ 針状ころ
５ 保持器
７ ポケット
７ａ、７ａ ころ案内面
８ 帯状基材
１１ 面取部（第２テーパー面） DESCRIPTION OF SYMBOLS 1 Needle roller bearing 2 Outer ring 3 Needle roller 5 Cage 7 Pocket 7a, 7a Roller guide surface 8 Band-shaped base material 11 Chamfered part (2nd taper surface)

Claims (1)

外輪の内周側に、複数のポケットを有する帯状基材の両端部を溶接してなる保持器を組み込み、各ポケットの保持器周方向に対向するころ案内面を、内径側に向けて幅狭となるテーパー面に形成してなり、保持器の径方向内方から針状ころをポケット内に押し入れるとともに上記ころ案内面で針状ころを抜け止めしている針状ころ軸受において、ポケットのころ案内面の内径側に面取部を形成したことを特徴とする針状ころ軸受。   A cage formed by welding both ends of a belt-like base material having a plurality of pockets is incorporated on the inner circumference side of the outer ring, and the roller guide surfaces facing the cage circumferential direction of each pocket are narrowed toward the inner diameter side. In the needle roller bearing, the needle roller is pushed into the pocket from the radially inner side of the cage, and the needle roller is prevented from coming off by the roller guide surface. A needle roller bearing characterized in that a chamfered portion is formed on the inner diameter side of the roller guide surface.
JP2004004225A 2004-01-09 2004-01-09 Needle roller bearing Pending JP2005195143A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007147036A (en) * 2005-11-30 2007-06-14 Ntn Corp Shell-shaped roller bearing and shell-shaped roller bearing structure
JP2007147037A (en) * 2005-11-30 2007-06-14 Ntn Corp Piston pin supporting structure of engine, crank shaft supporting structure of engine, and two cycle engine
JP2007170562A (en) * 2005-12-22 2007-07-05 Ntn Corp Shell type roller bearing for laminated connecting rod and connecting rod assembly
JP2009168173A (en) * 2008-01-17 2009-07-30 Jtekt Corp Roller bearing and roller bearing assembling method
JP2009264534A (en) * 2008-04-28 2009-11-12 Ntn Corp Welding retainer and its manufacturing method
JP2009299797A (en) * 2008-06-13 2009-12-24 Nsk Ltd Bottomed shell shaped full type roller bearing and universal joint
DE102014219311A1 (en) * 2014-09-24 2016-03-24 Aktiebolaget Skf Rolling bearing cage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007147036A (en) * 2005-11-30 2007-06-14 Ntn Corp Shell-shaped roller bearing and shell-shaped roller bearing structure
JP2007147037A (en) * 2005-11-30 2007-06-14 Ntn Corp Piston pin supporting structure of engine, crank shaft supporting structure of engine, and two cycle engine
JP2007170562A (en) * 2005-12-22 2007-07-05 Ntn Corp Shell type roller bearing for laminated connecting rod and connecting rod assembly
JP2009168173A (en) * 2008-01-17 2009-07-30 Jtekt Corp Roller bearing and roller bearing assembling method
JP2009264534A (en) * 2008-04-28 2009-11-12 Ntn Corp Welding retainer and its manufacturing method
JP2009299797A (en) * 2008-06-13 2009-12-24 Nsk Ltd Bottomed shell shaped full type roller bearing and universal joint
DE102014219311A1 (en) * 2014-09-24 2016-03-24 Aktiebolaget Skf Rolling bearing cage

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