JP4340419B2 - Synthetic resin cage - Google Patents

Synthetic resin cage Download PDF

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Publication number
JP4340419B2
JP4340419B2 JP2002152262A JP2002152262A JP4340419B2 JP 4340419 B2 JP4340419 B2 JP 4340419B2 JP 2002152262 A JP2002152262 A JP 2002152262A JP 2002152262 A JP2002152262 A JP 2002152262A JP 4340419 B2 JP4340419 B2 JP 4340419B2
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JP
Japan
Prior art keywords
engagement
cage
engaging
hole
claw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2002152262A
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Japanese (ja)
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JP2003343571A (en
Inventor
力 水谷
喜芳 山本
伸二 小原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Nakanishi Metal Works Co Ltd
Original Assignee
NTN Corp
Nakanishi Metal Works Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to JP2002152262A priority Critical patent/JP4340419B2/en
Priority to DE10324103A priority patent/DE10324103B4/en
Publication of JP2003343571A publication Critical patent/JP2003343571A/en
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Publication of JP4340419B2 publication Critical patent/JP4340419B2/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16C33/38—Ball cages
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3862—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together
    • F16C33/3875—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together made from plastic, e.g. two injection moulded parts joined by a snap fit
    • 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
    • F16C33/38—Ball cages
    • F16C33/3887—Details of individual pockets, e.g. shape or ball retaining means
    • 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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/70—Positive connections with complementary interlocking parts
    • F16C2226/74—Positive connections with complementary interlocking parts with snap-fit, e.g. by clips
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/20—Application independent of particular apparatuses related to type of movement
    • F16C2300/22—High-speed rotation

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

Description

【０００１】
【発明の属する技術分野】
この発明は、主として高速回転用玉軸受内に組み込まれる合成樹脂製保持器に関するものである。
【０００２】
【従来の技術】
高速回転用玉軸受の合成樹脂製保持器として、実開平６−１８４８号公報に記載されたものが従来から知られている。この公報に記載された合成樹脂製保持器においては、リング状の保持器本体の一側面に対向一対の爪を周方向に等間隔に設け、対向一対の爪間にボール保持用のポケットを形成し、隣接するポケット間の隣接する爪間に連結脚を設け、その連結脚にリング状の蓋体を連結している。
【０００３】
上記合成樹脂製保持器においては、保持器本体に蓋体を連結することによって、保持器本体の外径方向への変形を防止することができるため、剛性の高い保持器を得ることができ、高速回転用として使用することができるという特徴を有する。
【０００４】
【発明が解決しようとする課題】
ところで、上記従来の合成樹脂製保持器においては、保持器本体の成形用金型と、蓋体の成形用金型の２種類の成形金型を必要とするため、合成樹脂製保持器のコストが高く、そのコストを低減化を図るうえにおいて改善すべき点が残されている。
【０００５】
また、保持器本体と蓋体をそれぞれ別々に管理する必要があるため、管理工数が増え、その管理工数を少なくするうえにおいても改善すべき点が残されている。
【０００６】
この発明の課題は、高速回転用に使用することができるコストの安い組立ての容易な合成樹脂製保持器を提供することである。
【０００７】
【課題を解決するための手段】
上記の課題を解決するために、この発明においては、２枚の合成樹脂製環状体から成り、各環状体の互いに衝合される一側面のそれぞれにボールの外周に沿う複数の半球状ポケットを周方向に等間隔に形成し、隣接するポケット間の結合部それぞれに結合部の両側面に貫通する角形の係合孔を形成し、結合部の一側面には、保持器軸方向に延びて他方の環状体の係合孔に挿入される断面角形の係合爪を、その係合孔側の一端面が、係合孔の保持器周方向で対向する一方の端面と同一面を形成するように設け、前記係合孔の内周一端面に係合段部を形成し、係合爪の先端部にその係合段部に係合される鈎部を設け、前記係合爪を他方の環状体の係合孔に挿入し、鈎部を係合段部に係合させて２枚の環状体を連結する組立状態で係合爪の先端が他方の環状体の結合部の平坦面から出っ張らない寸法関係とした構成を採用したのである。
【０００８】
上記のように、環状体の結合部に係合爪と係合孔とを形成することによって、ポケット数が偶数であっても奇数であっても２枚の環状体を同一の形状とすることができる。このため、成形用金型は１種類でよく、合成樹脂製保持器のコストの低減を図ることができると共に、部品の管理も容易である。
【０００９】
【発明の実施の形態】
以下、この発明の実施の形態を図面に基づいて説明する。図３および４に示すように、この発明に係る保持器は、２枚の環状体１、１から成り、各環状体１は合成樹脂により成形されて同一の形状とされている。
【００１０】
図１および図２に示すように、環状体１は平面形状が波形とされ、その一側面にはボールＢの外周に沿う半球状のポケット２が周方向に等間隔に設けられている。
【００１１】
また、環状体１には、隣接するポケット２間に形成された結合部４に両側面に貫通する係合孔５と、他方の環状体１に形成された上記係合孔５に挿入される係合爪６とが形成されている。
【００１２】
係合孔５の内周には係合段部５ａが形成され、一方、係合爪６の先端部にはその係合段部５ａに係合される鈎部６ａが設けられている。
【００１３】
７は、結合部４の他側に形成された平坦面を示す。
【００１４】
２枚の環状体１、１は、半球状ポケット２が対向するよう組み合わせられ、係合孔５に対する係合爪６の係合によって結合一体化され、図４に示す保持器Ａが組み立てられる。
【００１５】
ここで、保持器Ａの組立ては、外輪と内輪間に複数のボールを組み込んだのち、その両輪の両側方から両輪間に形成される環状空間内に２枚の環状体１、１を嵌合して、係合孔５に係合爪６を挿入する。
【００１６】
このように、係合孔５に対する係合爪６の係合によって保持器Ａを組み立てることができるため、組立てが容易であると共に、係合孔５と係合爪６の係合によって環状体１の外径方向の変形を防止することができるため、剛性の高い保持器Ａを得ることができ、高速回転用として使用することができる。
【００１７】
また、保持器Ａを形成する２枚の環状体１は同一形状であるため、１種類の成形用金型で成形することができ、コストの安い保持器Ａを得ることができると共に、環状体１の管理も容易である。
【００１８】
実施の形態で示すように、係合爪６を、その先端６ｂが結合部４の平坦面７より出張らない寸法関係とすることにより、保持器Ａの組立て時、一方の環状体１の平坦面７を受け、他方の環状体１の平坦面７を押すことによって保持器Ａを容易に組立てることができる。
【００１９】
【発明の効果】
以上のように、この発明においては、保持器を形成する２枚の環状体が同一形状であるため、１種類の成形用金型により成形することができ、コストの安い保持器を得ることができる。
【００２０】
また、２枚の環状体は係合孔と係合爪の係合によって結合一体化されるため、組立てが容易であると共に、外径方向に変形することが少ない剛性の高い保持器を得ることができ、高速回転用として使用することができる。
【図面の簡単な説明】
【図１】この発明に係る保持器の成形用の環状体を示す正面図
【図２】図１の一部分を示す断面図
【図３】２枚の環状体の一部分を示す分解斜視図
【図４】２枚の環状体より組立てられた保持器の一部分を示す断面図
【符号の説明】
１ 環状体
２ ポケット
４ 結合部
５ 係合孔
６ 係合爪[0001]
BACKGROUND OF THE INVENTION
The present invention mainly relates to a synthetic resin cage incorporated in a ball bearing for high speed rotation.
[0002]
[Prior art]
As a synthetic resin cage for a ball bearing for high speed rotation, a cage described in Japanese Utility Model Laid-Open No. 6-1848 has been conventionally known. In the synthetic resin cage described in this publication, a pair of opposed claws are provided at equal intervals in the circumferential direction on one side surface of a ring-shaped cage body, and a ball holding pocket is formed between the opposed pair of claws. A connecting leg is provided between adjacent claws between adjacent pockets, and a ring-shaped lid is connected to the connecting leg.
[0003]
In the synthetic resin cage, by connecting the lid to the cage body, it is possible to prevent deformation in the outer diameter direction of the cage body, so that a highly rigid cage can be obtained, It can be used for high-speed rotation.
[0004]
[Problems to be solved by the invention]
By the way, since the conventional synthetic resin cage requires two types of molding dies, that is, a molding die for the cage body and a molding die for the lid, the cost of the synthetic resin cage is low. However, there is still a point to be improved in order to reduce the cost.
[0005]
In addition, since it is necessary to manage the cage body and the lid separately, the number of management man-hours increases, and there is still a point to be improved in reducing the management man-hours.
[0006]
An object of the present invention is to provide a synthetic resin cage that can be used for high-speed rotation and is easy to assemble at low cost.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, in the present invention, a plurality of hemispherical pockets along the outer periphery of the ball are formed on two side surfaces of each annular body which are abutted against each other. Formed at equal intervals in the circumferential direction, each of the joints between adjacent pockets has a rectangular engagement hole that penetrates both sides of the joint, and one side of the joint extends in the cage axial direction. The engaging claw having a square cross section to be inserted into the engaging hole of the other annular body has one end surface on the engaging hole side forming the same surface as the one end surface facing the engaging hole in the circumferential direction of the cage. An engagement step portion is formed on one end surface of the inner periphery of the engagement hole, and a hook portion that is engaged with the engagement step portion is provided at the distal end portion of the engagement claw. In the assembled state in which the two annular bodies are connected by inserting the collar portion into the engagement hole of the annular body and engaging the flange portion with the engagement step portion, It had adopted a configuration in which a dimensional relationship that does not project from the flat surface of the coupling portion of the annulus.
[0008]
As described above, by forming the engaging claw and the engaging hole in the coupling portion of the annular body, the two annular bodies have the same shape regardless of whether the number of pockets is even or odd. Can do. For this reason, only one type of molding die may be used, the cost of the synthetic resin cage can be reduced, and the management of the parts is easy.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 3 and 4, the cage according to the present invention includes two annular bodies 1, 1, and each annular body 1 is formed of a synthetic resin and has the same shape.
[0010]
As shown in FIGS. 1 and 2, the annular body 1 has a corrugated planar shape, and hemispherical pockets 2 along the outer periphery of the ball B are provided at equal intervals in the circumferential direction on one side surface thereof.
[0011]
Further, the annular body 1 is inserted into an engagement hole 5 penetrating both sides of a coupling portion 4 formed between adjacent pockets 2 and the engagement hole 5 formed in the other annular body 1. An engaging claw 6 is formed.
[0012]
An engagement step portion 5 a is formed on the inner periphery of the engagement hole 5, while a flange portion 6 a that is engaged with the engagement step portion 5 a is provided at the distal end portion of the engagement claw 6.
[0013]
Reference numeral 7 denotes a flat surface formed on the other side of the coupling portion 4.
[0014]
The two annular bodies 1, 1 are combined so that the hemispherical pockets 2 face each other, and are combined and integrated by engagement of the engagement claws 6 with the engagement holes 5, and the cage A shown in FIG. 4 is assembled.
[0015]
Here, the cage A is assembled by inserting a plurality of balls between the outer ring and the inner ring, and then fitting the two annular bodies 1 and 1 into the annular space formed between the two wheels from both sides of the two rings. Then, the engaging claw 6 is inserted into the engaging hole 5.
[0016]
As described above, the retainer A can be assembled by the engagement of the engagement claw 6 with the engagement hole 5, so that the assembly is easy and the annular body 1 is engaged by the engagement of the engagement hole 5 and the engagement claw 6. Therefore, the cage A having high rigidity can be obtained and used for high-speed rotation.
[0017]
In addition, since the two annular bodies 1 forming the cage A have the same shape, the cage A can be formed with one type of molding die, and a low-cost cage A can be obtained. Management of 1 is also easy.
[0018]
As shown in the embodiment, the engaging claw 6 has a dimensional relationship in which the tip 6b does not travel from the flat surface 7 of the coupling portion 4, so that when the retainer A is assembled, one annular body 1 is flat. The cage A can be easily assembled by receiving the surface 7 and pushing the flat surface 7 of the other annular body 1.
[0019]
【The invention's effect】
As described above, in the present invention, since the two annular bodies forming the cage have the same shape, the cage can be molded with one type of molding die, and a low-cost cage can be obtained. it can.
[0020]
In addition, since the two annular bodies are coupled and integrated by the engagement of the engagement holes and the engagement claws, it is easy to assemble and obtain a highly rigid cage that hardly deforms in the outer diameter direction. Can be used for high-speed rotation.
[Brief description of the drawings]
FIG. 1 is a front view showing an annular body for molding a cage according to the present invention. FIG. 2 is a sectional view showing a part of FIG. 1. FIG. 3 is an exploded perspective view showing a part of two annular bodies. 4] A cross-sectional view showing a part of a cage assembled from two annular members.
DESCRIPTION OF SYMBOLS 1 Ring body 2 Pocket 4 Coupling part 5 Engagement hole 6 Engagement claw

Claims (1)

２枚の合成樹脂製環状体から成り、各環状体の互いに衝合される一側面のそれぞれにボールの外周に沿う複数の半球状ポケットを周方向に等間隔に形成し、隣接するポケット間の結合部それぞれに結合部の両側面に貫通する角形の係合孔を形成し、結合部の一側面には、保持器軸方向に延びて他方の環状体の係合孔に挿入される断面角形の係合爪を、その係合孔側の一端面が、係合孔の保持器周方向で対向する一方の端面と同一面を形成するように設け、前記係合孔の内周一端面に係合段部を形成し、係合爪の先端部にその係合段部に係合される鈎部を設け、前記係合爪を他方の環状体の係合孔に挿入し、鈎部を係合段部に係合させて２枚の環状体を連結する組立状態で係合爪の先端が他方の環状体の結合部の平坦面から出っ張らない寸法関係とした合成樹脂製保持器。A plurality of hemispherical pockets formed along the outer periphery of the ball are formed at equal intervals in the circumferential direction on each of the side surfaces of the annular members that are abutted with each other, and are formed between the adjacent pockets. Each coupling part is formed with a square engaging hole penetrating both side surfaces of the coupling part, and one side surface of the coupling part has a square cross section that extends in the cage axial direction and is inserted into the engagement hole of the other annular body. of the engaging claw, one end face of the engagement hole side is provided so as to form a one end surface and the same surface of the facing in the cage circumferential direction of the engaging hole, the inner peripheral end surface of the engaging hole An engagement step portion is formed, and a flange portion that is engaged with the engagement step portion is provided at a tip portion of the engagement claw, the engagement claw is inserted into the engagement hole of the other annular body, and the flange portion is Dimensional function in which the tip of the engaging claw does not protrude from the flat surface of the connecting portion of the other annular body in the assembled state in which the two annular bodies are connected by being engaged with the engaging step portion. And synthetic resin cage.
JP2002152262A 2002-05-27 2002-05-27 Synthetic resin cage Expired - Lifetime JP4340419B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002152262A JP4340419B2 (en) 2002-05-27 2002-05-27 Synthetic resin cage
DE10324103A DE10324103B4 (en) 2002-05-27 2003-05-27 Resin cage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002152262A JP4340419B2 (en) 2002-05-27 2002-05-27 Synthetic resin cage

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Publication Number Publication Date
JP2003343571A JP2003343571A (en) 2003-12-03
JP4340419B2 true JP4340419B2 (en) 2009-10-07

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DE (1) DE10324103B4 (en)

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