JPH11325080A - Holder for radial ball bearing - Google Patents
Holder for radial ball bearingInfo
- Publication number
- JPH11325080A JPH11325080A JP10138230A JP13823098A JPH11325080A JP H11325080 A JPH11325080 A JP H11325080A JP 10138230 A JP10138230 A JP 10138230A JP 13823098 A JP13823098 A JP 13823098A JP H11325080 A JPH11325080 A JP H11325080A
- Authority
- JP
- Japan
- Prior art keywords
- ball
- retainer
- balls
- ball bearing
- 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.)
- Pending
Links
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
- F16C33/41—Ball cages comb-shaped
- F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
- F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
-
- 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
- F16C33/41—Ball cages comb-shaped
- F16C33/418—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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6629—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明のラジアル玉軸受用保
持器は、各種回転機械装置に使用される転がり軸受を構
成する保持器の改良に関し、この保持器と玉との滑り接
触部分に存在する潤滑剤を十分に確保して、転がり軸受
の振動と騒音とを低減する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cage for a radial ball bearing, which relates to an improvement of a cage constituting a rolling bearing used in various rotary machines, and exists in a sliding contact portion between the cage and the ball. A sufficient amount of lubricant is secured to reduce the vibration and noise of the rolling bearing.
【0002】[0002]
【従来の技術】各種回転機械装置の軸受部等、各種回転
部分を支持する為の玉軸受として、例えば図6に示す様
な構造のものが広く使用されている。この玉軸受は、外
周面に内輪軌道1を有する内輪2と内周面に外輪軌道3
を有する外輪4とを互いに同心に配置し、上記内輪軌道
1と外輪軌道3との間に複数個の玉5、5を転動自在に
設けて成る。図示の例の場合、上記内輪軌道1と外輪軌
道3とは、共に深溝型としている。又、上記複数個の玉
5、5は、保持器6に設けたポケット8、8内に、転動
自在に保持している。2. Description of the Related Art As a ball bearing for supporting various rotating parts such as a bearing part of various rotating machine devices, for example, one having a structure as shown in FIG. 6 is widely used. This ball bearing comprises an inner race 2 having an inner race 1 on its outer peripheral surface and an outer race 3 on its inner peripheral surface.
And the outer ring 4 having a plurality of balls 5, 5 are provided concentrically with each other, and a plurality of balls 5, 5 are rotatably provided between the inner ring track 1 and the outer ring track 3. In the illustrated example, both the inner raceway 1 and the outer raceway 3 are of a deep groove type. The plurality of balls 5 are rollably held in pockets 8 provided in a holder 6.
【0003】上記図6に示した玉軸受を構成する保持器
6は、波形プレス保持器と呼ばれるもので、それぞれが
金属板材をプレス成形する事により得られる、波形で円
環状に形成された1対の素子9、9を組み合わせて成
る。これら両素子9、9は、それぞれの円周方向複数個
所に、ポケット8、8を構成する為の凹部8a、8aを
形成している。そして、これら1対の素子9、9同士
を、上記凹部8a、8aから外れた部分で突き合わせ、
これら各部分を複数のリベット10により結合固定し
て、円環状で円周方向複数個所にポケット8、8を有す
る保持器6としている。上記各凹部8a、8aの内面中
間部は、上記各玉5、5の外面の曲率半径よりも僅かに
大きな曲率半径を有する、球面状の保持凹面11として
いる。この為、1対の素子9、9を突き合わせると、上
記凹部8a、8aが組み合わされてポケット8、8を構
成する。[0003] The cage 6 constituting the ball bearing shown in FIG. 6 is called a corrugated press retainer. Each of the retainers 6 is formed by press-molding a metal plate material. It consists of a pair of elements 9,9. These two elements 9, 9 have recesses 8a, 8a for forming the pockets 8, 8 at a plurality of positions in the circumferential direction, respectively. Then, the pair of elements 9, 9 are abutted with each other at a portion deviating from the concave portions 8 a, 8 a,
These parts are connected and fixed by a plurality of rivets 10 to form a retainer 6 having an annular shape and having pockets 8 at a plurality of circumferential positions. The intermediate portion of the inner surface of each of the recesses 8a, 8a is a spherical holding concave surface 11 having a radius of curvature slightly larger than the radius of curvature of the outer surface of each of the balls 5,5. Therefore, when the pair of elements 9, 9 are abutted, the recesses 8 a, 8 a are combined to form pockets 8, 8.
【0004】又、図7に示した、冠型保持器と呼ばれる
保持器6aは、合成樹脂等により造られた円環状の主部
7の円周方向複数個所に、玉5、5(図6)を転動自在
に保持するポケット8、8を設けている。この様な冠型
の保持器6aの場合、上記各ポケット8、8は、上記主
部7に互いに間隔をあけて配置された1対の弾性片1
2、12の片側面と、上記主部7の軸方向(図7の上下
方向)片面(図7の上面)でこれら1対の弾性片12、
12の間部分に設けられた球面状の凹面部13、13と
から構成する。これら各凹面部13、13の曲率半径
は、上記玉5の外面の曲率半径よりも僅かに大きい。A cage 6a called a crown-shaped cage shown in FIG. 7 is provided with balls 5, 5 (FIG. 6) at a plurality of circumferential positions of an annular main part 7 made of synthetic resin or the like. ) Are provided so that they can roll freely. In the case of such a crown-shaped retainer 6a, each of the pockets 8, 8 is provided on the main portion 7 with a pair of elastic pieces 1 spaced from each other.
2 and 12 and one side (upper surface in FIG. 7) of the main portion 7 in the axial direction (vertical direction in FIG. 7).
12 and spherical concave portions 13 and 13 provided in a portion between them. The radius of curvature of each of the concave portions 13 is slightly larger than the radius of curvature of the outer surface of the ball 5.
【0005】玉軸受を組み立てる場合には上記各玉5、
5を、各ポケット8、8を構成する1対ずつの弾性片1
2、12の先端縁同士の間隔を弾性的に押し広げつつ、
これら1対の弾性片12、12の間に押し込む。上記保
持器6aは、この様にして上記各ポケット8、8内に玉
5、5を抱き込む事により、これら各玉5、5を、前記
内輪軌道1と外輪軌道3(図6)との間に、転動自在に
保持する。When assembling the ball bearing, each of the balls 5,
5 is a pair of elastic pieces 1 forming each pocket 8, 8.
While elastically expanding the interval between the tip edges of 2, 12,
It is pushed between the pair of elastic pieces 12, 12. By holding the balls 5 and 5 in the pockets 8 and 8 in this manner, the retainer 6a connects the balls 5 and 5 to the inner raceway 1 and the outer raceway 3 (FIG. 6). In between, it is held so that it can roll freely.
【0006】前述した保持器6或は上述した保持器6a
を備えた玉軸受の使用時には、上記複数個の玉5、5の
転動に伴って、上記内輪2と外輪4との相対回転を自在
とする。この際上記複数の玉5、5は、自転しつつ上記
内輪2の周囲を公転する。又、上記保持器6、6aは、
上記玉5、5の公転速度と同じ速度で、上記内輪2の周
囲を回転する。The above-mentioned cage 6 or the above-mentioned cage 6a
When the ball bearing provided with is used, the relative rotation between the inner ring 2 and the outer ring 4 is made free with the rolling of the plurality of balls 5. At this time, the plurality of balls 5, 5 revolve around the inner ring 2 while rotating. The retainers 6 and 6a are
The balls 5 and 5 rotate around the inner ring 2 at the same speed as the revolution speed thereof.
【0007】上記内輪2の外周面と外輪4の内周面との
間部分には、グリースその他の潤滑油等の潤滑剤を充填
若しくは連続的に供給して、上記相対回転が円滑に行な
われる様にする。そして、玉軸受に振動や騒音が生じな
い様にすると共に、焼き付き等の故障を防止する。尚、
一部の玉軸受では、シール板やシールド板等の密封部材
により、内輪2の外周面と外輪4の内周面との間の空間
の両端開口を塞ぎ、この空間から潤滑剤が漏洩したり、
或はこの空間内に塵芥等の異物が進入するのを防止する
場合もある。但し、前記図6には、この様な密封部材を
持たない玉軸受を示している。A portion between the outer peripheral surface of the inner race 2 and the inner peripheral surface of the outer race 4 is filled or continuously supplied with a lubricant such as grease or other lubricating oil, so that the relative rotation is smoothly performed. Like In addition, vibration and noise are not generated in the ball bearing, and failures such as burn-in are prevented. still,
In some ball bearings, both ends of a space between the outer peripheral surface of the inner ring 2 and the inner peripheral surface of the outer ring 4 are closed by a sealing member such as a seal plate or a shield plate, and lubricant may leak from this space. ,
Alternatively, foreign substances such as dust may be prevented from entering the space. However, FIG. 6 shows a ball bearing without such a sealing member.
【0008】上述した様な保持器6、6aを組み込んだ
玉軸受の場合、必要量の潤滑剤を充填若しくは供給して
も、この保持器6、6aに振動が誘発され、当該保持器
6、6aを組み込んだ玉軸受に、保持器音と呼ばれる騒
音や振動が発生する場合がある。この様な保持器6、6
aの振動は、保持器6、6aの玉5、5に対する動き量
が大きい事に起因して、玉5、5と保持器6、6aとの
間の衝突や滑り摩擦に基づいて発生する。即ち、上記保
持器6、6aが玉5、5に対してラジアル方向に変位す
ると、これら各玉5、5の転動面と各ポケット8、8の
内面とが勢い良く衝突して上記保持器音を発生する他、
これら転動面と内面との摩擦によっても、上記保持器音
が発生する。この様な保持器音の発生を抑える為に従来
から、ポケット8、8の内面と玉5、5の転動面との間
の隙間を小さくして、玉5、5に対する保持器6、6a
の動き量を小さくし、保持器音の発生を抑える事が行な
われている。[0008] In the case of a ball bearing incorporating the retainers 6 and 6a as described above, even if a required amount of lubricant is filled or supplied, vibrations are induced in the retainers 6 and 6a, and the retainers 6 and 6a are vibrated. Noise or vibration called retainer sound may be generated in the ball bearing incorporating 6a. Such a cage 6, 6
The vibration a is generated based on a collision or sliding friction between the balls 5, 5 and the retainers 6, 6a due to a large amount of movement of the retainers 6, 6a with respect to the balls 5, 5. That is, when the cages 6 and 6a are displaced in the radial direction with respect to the balls 5 and 5, the rolling surfaces of the balls 5 and 5 and the inner surfaces of the pockets 8 and 8 vigorously collide with each other, and In addition to generating sound,
The cage noise is also generated by the friction between the rolling surface and the inner surface. Conventionally, in order to suppress the generation of such retainer sounds, the gap between the inner surfaces of the pockets 8 and 8 and the rolling surfaces of the balls 5 and 5 has been reduced so that the retainers 6 and 6a
In this case, the amount of movement of the cage is reduced to suppress the occurrence of cage sound.
【0009】[0009]
【発明が解決しようとする課題】しかしながら、単に玉
5、5に対する保持器6、6aの動き量を小さくしただ
けでは、上記保持器6、6aのポケット8、8の内周面
形状に起因して、保持器音が発生する。この理由に就い
て、図8〜9により説明する。保持器6、6aのポケッ
ト8の開口周縁部14、14には、図8〜9に示す様
に、鋭い(曲率が大きい)角部15、15が存在し、こ
れら各角部15、15部分が潤滑剤の流れに対する抵抗
となる。However, simply reducing the amount of movement of the retainers 6, 6a with respect to the balls 5, 5 is due to the inner peripheral surface shape of the pockets 8, 8 of the retainers 6, 6a. Then, a retainer sound is generated. This reason will be described with reference to FIGS. As shown in FIGS. 8 to 9, sharp (greater curvature) corner portions 15, 15 are present at the opening peripheral portions 14, 14 of the pockets 8 of the retainers 6, 6 a. Is the resistance to the flow of the lubricant.
【0010】従って、保持器音を抑制すべくポケット8
の内面と玉5の転動面との間の隙間16を小さくする
と、この隙間16内に潤滑剤が流入しにくくなる。即
ち、上記玉5の転動に伴って周囲空間からこの隙間16
内に入り込もうとする潤滑剤は、上記各角部15、15
に掻き取られて、上記隙間16内に入り込みにくくな
る。この為、この隙間16内に十分な量の潤滑剤が取り
込まれなくなって、保持器6、6aと玉5、5との滑り
接触部分の摩擦振動を十分に抑制できなくなり、振動や
騒音を誘発する。本発明のラジアル玉軸受用保持器は、
この様な事情に鑑みて発明したものである。Therefore, the pocket 8 is required to suppress the retainer sound.
When the gap 16 between the inner surface of the ball 5 and the rolling surface of the ball 5 is reduced, the lubricant does not easily flow into the gap 16. That is, as the ball 5 rolls, the gap 16 is removed from the surrounding space.
The lubricant that is going to enter the inside of each corner 15, 15
And it is difficult to enter the gap 16. For this reason, a sufficient amount of the lubricant cannot be taken in the gap 16, and the frictional vibration of the sliding contact portion between the retainers 6, 6a and the balls 5, 5 cannot be sufficiently suppressed, and vibration and noise are induced. I do. The retainer for a radial ball bearing of the present invention includes:
The present invention has been made in view of such circumstances.
【0011】[0011]
【課題を解決するための手段】本発明のラジアル玉軸受
用保持器は、前述した従来のラジアル玉軸受用保持器と
同様に、複数の玉を転動自在に保持すべく、全体を円環
状に形成し、円周方向複数個所にポケットを設けてい
る。特に、本発明のラジアル玉軸受用保持器に於いて
は、上記各ポケットの内面の一部で当該ポケット内に保
持される玉の転動面と接触する第一部分を、上記各ポケ
ット内に保持された複数個の玉のピッチ円よりも直径方
向外側に位置させている。これと共に、上記各ポケット
の内面の残部で上記第一部分に対し当該ポケットの直径
方向のほぼ反対側に位置し、当該ポケット内に保持され
る玉の転動面が接触する第二部分を、上記各ポケット内
に保持された複数個の玉のピッチ円よりも直径方向内側
に位置させている。The retainer for a radial ball bearing according to the present invention is, like the above-described conventional retainer for a radial ball bearing, entirely annular in order to hold a plurality of balls in a freely rolling manner. And pockets are provided at a plurality of positions in the circumferential direction. In particular, in the radial ball bearing retainer of the present invention, a part of the inner surface of each of the pockets, which is in contact with the rolling surface of the ball held in the pocket, is held in each of the pockets. The plurality of balls are positioned diametrically outside the pitch circle of the plurality of balls. At the same time, the remaining portion of the inner surface of each pocket is located on the opposite side of the first portion in the diametric direction of the pocket with respect to the first portion, and the second portion where the rolling surface of the ball held in the pocket is in contact, The plurality of balls held in each pocket are positioned diametrically inward from the pitch circle.
【0012】[0012]
【作用】上述の様に構成する本発明のラジアル玉軸受用
保持器が、複数の玉を転動自在に保持する際の作用は、
前述した従来のラジアル玉軸受用保持器の場合と同様で
ある。特に、本発明のラジアル玉軸受用保持器の場合に
は、各ポケット内に保持した玉に対する保持器の動き量
を抑え、しかもポケットの内面と玉の転動面との間の隙
間に潤滑剤を、必要量だけ取り込む事が可能になる。こ
の為、玉の転動面とポケット内面とが勢い良く衝突する
事を防止すると共に、これら両面同士が擦れ合う部分の
潤滑性を向上させて、保持器音と呼ばれる振動や騒音の
発生防止、並びに保持器を組み込んだラジアル玉軸受の
回転トルクの低減並びに耐久性向上に寄与する。The operation of the radial ball bearing retainer of the present invention configured as described above, when holding a plurality of balls in a freely rolling manner, is as follows.
This is the same as in the case of the conventional radial ball bearing retainer described above. In particular, in the case of the cage for a radial ball bearing of the present invention, the amount of movement of the cage with respect to the ball held in each pocket is suppressed, and the lubricant is inserted into the gap between the inner surface of the pocket and the rolling surface of the ball. Can be taken in as much as needed. For this reason, while preventing the rolling surface of the ball and the inner surface of the pocket from violently colliding with each other, improving the lubricity of the portion where these two surfaces rub against each other, preventing the generation of vibration and noise called retainer sound, and This contributes to a reduction in rotational torque and an improvement in durability of a radial ball bearing incorporating a retainer.
【0013】[0013]
【発明の実施の形態】図1〜2は、本発明の実施の形態
の第1例を示している。本例は、本発明を前記図7に示
した冠型保持器に適用したものである。尚、本発明の特
徴は、玉5に対する保持器6bのラジアル方向の変位を
抑えつつ、言い換えればポケット8内での玉5のラジア
ル方向変位を抑えつつ、ポケット8の内面と玉5の転動
面との間の隙間16(図8、9参照)にグリース等の潤
滑剤を十分に取り込める様にすべく、上記ポケット8の
内面形状を工夫した点にある。その他の部分の構成及び
作用に就いては、前述した従来技術と同様であるから、
同等部分に関する図示並びに説明は、省略若しくは簡略
にし、以下、本発明の特徴部分を中心に説明する。1 and 2 show a first embodiment of the present invention. In this embodiment, the present invention is applied to the crown type retainer shown in FIG. The feature of the present invention is that the rolling of the ball 5 and the inner surface of the pocket 8 is suppressed while suppressing the radial displacement of the cage 6 b with respect to the ball 5, in other words, while suppressing the radial displacement of the ball 5 in the pocket 8. The inner shape of the pocket 8 is devised so that a lubricant such as grease can be sufficiently taken in the gap 16 between the pocket and the surface (see FIGS. 8 and 9). Since the configuration and operation of the other parts are the same as in the above-described conventional technology,
The illustration and description of the equivalent parts are omitted or simplified, and the following description focuses on the features of the present invention.
【0014】円環状の主部7の軸方向片面に設けたポケ
ット8の内面は、上記保持器6bの直径方向(図2の上
下方向)中央部に、円筒面17を設けている。そして、
この円筒面17よりも直径方向外側部分に於いて、上記
ポケット8の円周方向一部に、外径側円すい面18を形
成している。この外径側円すい面18は、上記保持器6
bの直径方向外方に向かう程直径が小さくなる、円すい
凹面である。上記ポケット8内に転動自在に保持した玉
5の転動面の一部は、上記外径側円すい面18の一部に
接触する。請求項に記載した第一部分である、これら転
動面と外径側円すい面18との接触部分は、上記保持器
6bに設けた複数のポケット8内に保持された複数個の
玉5のピッチ円イよりも直径方向外側に位置する。又、
上記ポケット8の内面のうち、円筒面17よりも直径方
向外側部分の残部、即ち、この円筒面17よりも保持器
6bの外径側部分で上記外径側円すい面18から外れた
部分の内径は、この円筒面17の直径よりも大きくし
て、上記残部と上記玉5の転動面とが十分に離れる様に
している。An inner surface of the pocket 8 provided on one surface in the axial direction of the annular main portion 7 has a cylindrical surface 17 at the center of the retainer 6b in the diameter direction (vertical direction in FIG. 2). And
An outer diameter side conical surface 18 is formed in a part of the pocket 8 in the circumferential direction at a portion diametrically outside the cylindrical surface 17. The outer diameter side conical surface 18 is connected to the retainer 6.
b is a conical concave surface in which the diameter becomes smaller toward the outside in the diameter direction. A part of the rolling surface of the ball 5 rotatably held in the pocket 8 contacts a part of the outer diameter side conical surface 18. The contact portion between the rolling surface and the outer diameter side conical surface 18, which is the first portion described in the claims, is a pitch of the plurality of balls 5 held in the plurality of pockets 8 provided in the retainer 6b. It is located diametrically outside the circle a. or,
Of the inner surface of the pocket 8, the remaining portion of the outer portion in the diameter direction from the cylindrical surface 17, that is, the inner diameter of the portion of the retainer 6 b outside the cylindrical surface 17 that deviates from the outer diameter conical surface 18. Is larger than the diameter of the cylindrical surface 17 so that the remaining portion and the rolling surface of the ball 5 are sufficiently separated.
【0015】これに対して、上記円筒面17よりも直径
方向内側部分に於いて、上記ポケット8の円周方向残部
で上記外径側円すい面18に対しこのポケット8の直径
方向のほぼ反対側部分に、内径側円すい面19を形成し
ている。この内径側円すい面19は、上記保持器6bの
直径方向内方に向かう程直径が小さくなる、円すい凹面
である。上記ポケット8内に転動自在に保持した玉5の
転動面の一部は、上記内径側円すい面19の一部に接触
する。請求項に記載した第二部分である、これら転動面
と内径側円すい面19との接触部分は、上記保持器6b
に設けた複数のポケット8内に保持された複数個の玉5
のピッチ円イよりも直径方向内側に位置する。又、上記
ポケット8の内面のうち、円筒面17よりも直径方向内
側部分の残部、即ち、この円筒面17よりも保持器6b
の内径側部分で上記内径側円すい面19から外れた部分
の内径は、この円筒面17の直径よりも大きくして、上
記残部と上記玉5の転動面とが十分に離れる様にしてい
る。On the other hand, at a portion in the diameter direction inside of the cylindrical surface 17, the remaining portion of the pocket 8 in the circumferential direction is substantially opposite to the outer diameter side conical surface 18 in the diameter direction of the pocket 8. An inner diameter side conical surface 19 is formed in the portion. The inner diameter side conical surface 19 is a conical concave surface whose diameter decreases toward the inside in the diameter direction of the retainer 6b. A part of the rolling surface of the ball 5 rotatably held in the pocket 8 comes into contact with a part of the inner diameter side conical surface 19. The contact portion between the rolling surface and the inner diameter side conical surface 19, which is the second portion described in the claims, is provided in the cage 6b.
Balls 5 held in a plurality of pockets 8 provided in
Is located diametrically inward of the pitch circle a. Also, of the inner surface of the pocket 8, the remaining portion of the inner side in the diametrical direction from the cylindrical surface 17, that is, the retainer 6 b
The inner diameter of the portion of the inner diameter side deviated from the inner diameter side conical surface 19 is larger than the diameter of the cylindrical surface 17 so that the remaining portion and the rolling surface of the ball 5 are sufficiently separated. .
【0016】上述の様に構成する本発明のラジアル玉軸
受用保持器の場合には、それぞれが上述の様な内面形状
を有する各ポケット8内に保持した玉5に対する保持器
6bの動き量を抑え、しかもこれら各ポケット8の内面
と玉5の転動面との間の隙間に潤滑剤を、必要量だけ取
り込む事が可能になる。即ち、上記保持器6bにより転
動自在に保持した複数個の玉5に対してこの保持器6b
が、直径方向内側に変位する事は、上記外径側円すい面
18と上記各玉5の転動面との係合に基づいて阻止す
る。反対に、これら各玉5に対して上記保持器6bが、
直径方向外側に変位する事は、上記内径側円すい面19
と上記各玉5の転動面との係合に基づいて阻止する。In the case of the cage for a radial ball bearing of the present invention configured as described above, the amount of movement of the cage 6b with respect to the ball 5 held in each pocket 8 having the inner surface shape as described above is determined. In addition, it is possible to take in a necessary amount of the lubricant into the gap between the inner surface of each pocket 8 and the rolling surface of the ball 5. That is, the plurality of balls 5 rotatably held by the cage 6b are
However, displacement inward in the diameter direction is prevented based on the engagement between the outer diameter side conical surface 18 and the rolling surface of each of the balls 5. On the contrary, for each of these balls 5, the retainer 6b is
Displacement to the outside in the diametrical direction is caused by the above-mentioned inner side conical surface 19.
And the ball 5 engages with the rolling surface.
【0017】しかも、これら各玉5に対する上記保持器
6bのラジアル方向に亙る変位を僅少に抑えるべく、上
記外径側、内径側両円すい面18、19と上記各玉5の
転動面とを近接させても、上記潤滑剤を取り込む為の開
口部の面積を確保できる。即ち、上記保持器6bの内外
両周面部分に於ける、上記各ポケット8の両端開口周縁
部と上記各玉5の転動面との間は、上記外径側、内径側
両円すい面18、19を外れた部分に於いて、大きく開
口している。従って、上述の様に、各玉5に対する上記
保持器6bのラジアル方向に亙る変位を僅少に抑え、し
かも上記潤滑剤を取り込む為の開口部の面積を確保でき
る。これらにより、上記各玉5の転動面とポケット8の
内面とが勢い良く衝突する事を防止すると共に、これら
両面同士が擦れ合う部分の潤滑性を向上させて、保持器
音と呼ばれる振動や騒音の発生防止、並びに保持器6b
を組み込んだラジアル玉軸受の回転トルクの低減並びに
耐久性向上を図れる。Furthermore, in order to minimize the radial displacement of the retainer 6b with respect to each of the balls 5, the outer and inner conical surfaces 18 and 19 and the rolling surface of each of the balls 5 are formed. Even if they are close to each other, the area of the opening for taking in the lubricant can be secured. That is, the outer diameter side and the inner diameter side conical surfaces 18 are provided between the peripheral edges of both ends of the pockets 8 and the rolling surfaces of the balls 5 in the inner and outer peripheral surfaces of the retainer 6b. , 19 are largely open at the portions outside. Therefore, as described above, the displacement of the retainer 6b in the radial direction with respect to each ball 5 can be slightly suppressed, and the area of the opening for taking in the lubricant can be secured. Thus, the rolling surface of each ball 5 and the inner surface of the pocket 8 are prevented from violently colliding with each other, and the lubricating properties of a portion where these two surfaces rub against each other are improved, so that vibration and noise called retainer sound are generated. Prevention of occurrence, and cage 6b
The reduction of the rotational torque and the improvement of the durability of a radial ball bearing incorporating the same can be achieved.
【0018】次に、図3〜4は、本発明の実施の形態の
第2例を示している。本例の場合には、ポケット8の内
面のうち、円筒面17よりも保持器6cの直径方向外側
部分に外径側球面20を、同じく直径方向内側部分に内
径側球面21を、それぞれ形成している。これら外径
側、内径側両球面20、21は、それぞれ玉5の転動面
の曲率半径よりも僅かに大きな曲率半径を有する球状凹
面としている。この様な本例の構造の場合には、上記外
径側、内径側両球面20、21と玉5の転動面との係合
に基づいて、玉5に対して上記保持器6cが直径方向に
変位する事を阻止する。その他の構成及び作用は、上述
した第1例の場合と同様である。Next, FIGS. 3 and 4 show a second example of the embodiment of the present invention. In the case of this example, an outer-diameter-side spherical surface 20 is formed on the inner surface of the pocket 8 in the diametrically outer portion of the retainer 6c than the cylindrical surface 17, and an inner-diameter-side spherical surface 21 is formed on the same diametrically inner portion. ing. Each of the outer and inner spherical surfaces 20 and 21 is a spherical concave surface having a slightly larger radius of curvature than the radius of curvature of the rolling surface of the ball 5. In the case of such a structure of the present example, the retainer 6c has a diameter relative to the ball 5 based on the engagement between the outer and inner spherical surfaces 20, 21 and the rolling surface of the ball 5. Prevent displacement in the direction. Other configurations and operations are the same as those of the above-described first example.
【0019】尚、本発明を実施する場合に、請求項に記
載した第一部分に相当する部分と第二部分に相当する部
分とを、玉のピッチ円の内側と外側とに振り分けられる
ものであれば、例えば、第1〜2例の形状を組み合わせ
る等、各部の形状を図示の例に限らず、各種変更実施で
きる。又、保持器の案内は、転動体案内であっても、或
は軌道輪案内であっても良い。更には、ポケットの開口
周縁部に面取り若しくは断面円弧状の凸曲面部を形成す
る等により、ポケット内への潤滑剤の取り込みを一層効
率良く行なえる様にする事もできる。In practicing the present invention, the portion corresponding to the first portion and the portion corresponding to the second portion described in the claims can be divided into the inside and outside of the pitch circle of the ball. For example, the shape of each part is not limited to the illustrated example, such as combining the shapes of the first and second examples, and various changes can be made. Further, the guide of the retainer may be a rolling element guide or a raceway guide. Further, by taking a chamfer or forming a convex curved surface having an arc-shaped cross section at the periphery of the opening of the pocket, the lubricant can be more efficiently taken into the pocket.
【0020】[0020]
【実施例】次に、本発明の効果を確認する為、本発明者
が行なった実験に就いて説明する。実験は、本発明に属
する保持器を組み込んだラジアル玉軸受と、従来構造に
属する保持器を組み込んだラジアル玉軸受とを用意し、
これら両玉軸受の外輪を固定したまま内輪を回転させ、
その回転に要するトルクを測定する事により行なった。
本発明に属する保持器としては、図1〜2に示す様な形
状を有するポケット8を設けたものを、従来構造に属す
る保持器としては、図7に示す様に、内面を単一の球状
凹面としたポケットを設けたものを、それぞれ用意し
た。又、保持器の材質としては、ポリアミド66中にガ
ラス繊維を10容量%混入した、繊維強化プラスチック
製のものを使用した。この保持器の内径は6.7mm、外
径は8.7mm、軸方向に亙る高さは1.73mmのものを
使用した。又、この様な保持器を組み込むラジアル玉軸
受としては、呼び番号がMR115Bであるミニアチュ
アベアリング(内径が5mm、外径が11mm、幅が4mm)
を使用した。又、潤滑は、エステル系防錆潤滑油をオイ
ルプレーティングにより塗布した。ポケット8の内面形
状以外の条件は、総て同じとした。EXAMPLE Next, an experiment conducted by the present inventor to confirm the effect of the present invention will be described. In the experiment, a radial ball bearing incorporating a cage belonging to the present invention and a radial ball bearing incorporating a cage belonging to a conventional structure were prepared.
Rotating the inner ring while fixing the outer ring of these two ball bearings,
This was performed by measuring the torque required for the rotation.
As a cage belonging to the present invention, a cage provided with a pocket 8 having a shape as shown in FIGS. 1 and 2 is used. As a cage belonging to the conventional structure, as shown in FIG. Each having a concave pocket was prepared. Further, as a material of the retainer, a material made of fiber reinforced plastic in which glass fiber was mixed in polyamide 66 at 10% by volume was used. The retainer used had an inner diameter of 6.7 mm, an outer diameter of 8.7 mm, and a height in the axial direction of 1.73 mm. As a radial ball bearing incorporating such a retainer, a miniature bearing having an identification number of MR115B (inner diameter is 5 mm, outer diameter is 11 mm and width is 4 mm)
It was used. For lubrication, an ester-based antirust lubricating oil was applied by oil plating. The conditions other than the inner shape of the pocket 8 were all the same.
【0021】上述の様に、保持器のポケットの内面形状
のみを変えた2種類のラジアル玉軸受を電動モータに組
み付け、1.5kgf の予圧を付与した状態で、5400
rpmで内輪を回転させ、その回転に伴って発生する騒音
を測定したところ、図5に示す様な結果を得られた。こ
の図5に示した実線αは、本発明に属する保持器を組み
込んだラジアル玉軸受の騒音レベルを、同じく破線β
は、従来構造に属する保持器を組み込んだラジアル玉軸
受の騒音レベルを、それぞれ示している。この様な実験
の結果を示す図5の記載から明らかな通り、本発明の保
持器を組み込んだラジアル玉軸受の場合には、特に耳障
りな高周波域での騒音特性が良好になる。As described above, two types of radial ball bearings in which only the inner shape of the pocket of the cage is changed are assembled to the electric motor, and 5400 kgf is applied under a preload of 1.5 kgf.
When the inner ring was rotated at rpm and the noise generated with the rotation was measured, the results shown in FIG. 5 were obtained. The solid line α shown in FIG. 5 indicates the noise level of the radial ball bearing incorporating the cage according to the present invention, similarly to the broken line β.
Indicates the noise level of a radial ball bearing incorporating a cage belonging to the conventional structure. As is clear from the description of FIG. 5 showing the results of such an experiment, in the case of the radial ball bearing incorporating the cage of the present invention, the noise characteristics particularly in a harsh high-frequency range are improved.
【0022】[0022]
【発明の効果】本発明のラジアル玉軸受用保持器は、以
上に述べた通り構成され作用する為、保持器音の発生を
抑えつつ、騒音を小さくして、ラジアル玉軸受を組み込
んだ各種機器の性能向上に寄与できる。The cage for a radial ball bearing according to the present invention is constructed and operates as described above, so that various kinds of equipment incorporating the radial ball bearing with reduced noise while suppressing generation of cage noise. Can contribute to the performance improvement.
【図1】本発明の実施の形態の第1例を示す、保持器の
部分拡大斜視図。FIG. 1 is a partially enlarged perspective view of a retainer, showing a first example of an embodiment of the present invention.
【図2】図1のA矢視図。FIG. 2 is a view taken in the direction of arrow A in FIG. 1;
【図3】本発明の実施の形態の第2例を示す、保持器の
部分拡大斜視図。FIG. 3 is a partially enlarged perspective view of a retainer, showing a second example of the embodiment of the present invention.
【図4】図3のB矢視図。FIG. 4 is a view taken in the direction of arrow B in FIG. 3;
【図5】本発明の効果を確認する為に行なった実験の結
果を示す線図。FIG. 5 is a diagram showing the results of an experiment performed to confirm the effects of the present invention.
【図6】従来から知られている保持器を組み込んだ玉軸
受の1例を示す部分切断斜視図。FIG. 6 is a partially cutaway perspective view showing an example of a ball bearing incorporating a conventionally known cage.
【図7】従来から知られている保持器の別例を示す斜視
図。FIG. 7 is a perspective view showing another example of a conventionally known cage.
【図8】図6に示した保持器に玉を保持した状態を示す
拡大断面図。FIG. 8 is an enlarged cross-sectional view showing a state where a ball is held by the cage shown in FIG. 6;
【図9】図7に示した保持器に玉を保持した状態を示す
拡大断面図。FIG. 9 is an enlarged cross-sectional view showing a state where a ball is held in the cage shown in FIG. 7;
1 内輪軌道 2 内輪 3 外輪軌道 4 外輪 5 玉 6、6a、6b、6c 保持器 7 主部 8 ポケット 8a 凹部 9 素子 10 リベット 11 保持凹面 12 弾性片 13 凹面部 14 開口周縁部 15 角部 16 隙間 17 円筒面 18 外径側円すい面 19 内径側円すい面 20 外径側球面 21 内径側球面 Reference Signs List 1 inner ring track 2 inner ring 3 outer ring track 4 outer ring 5 ball 6, 6a, 6b, 6c retainer 7 main portion 8 pocket 8a concave portion 9 element 10 rivet 11 retaining concave surface 12 elastic piece 13 concave surface portion 14 opening peripheral edge 15 corner 16 gap 17 cylindrical surface 18 outer diameter side cone surface 19 inner diameter side cone surface 20 outer diameter side spherical surface 21 inner diameter side spherical surface
Claims (1)
を円環状に形成し、円周方向複数個所にポケットを設け
たラジアル玉軸受用保持器に於いて、上記各ポケットの
内面の一部で当該ポケット内に保持される玉の転動面と
接触する第一部分を、上記各ポケット内に保持された複
数個の玉のピッチ円よりも直径方向外側に位置させると
共に、上記各ポケットの内面の残部で上記第一部分に対
し当該ポケットの直径方向のほぼ反対側に位置し、当該
ポケット内に保持される玉の転動面が接触する第二部分
を、上記各ポケット内に保持された複数個の玉のピッチ
円よりも直径方向内側に位置させる事を特徴とするラジ
アル玉軸受用保持器。An inner surface of each pocket in a radial ball bearing retainer having a plurality of balls formed so as to be able to roll freely and having pockets at a plurality of positions in a circumferential direction. A part of the first portion that is in contact with the rolling surface of the ball held in the pocket is positioned diametrically outside the pitch circle of the plurality of balls held in each pocket, and The remaining portion of the inner surface of the pocket, which is located substantially opposite to the first portion in the diametrical direction of the pocket with respect to the first portion and is in contact with the rolling surface of the ball held in the pocket, is retained in each of the pockets. A radial ball bearing retainer, wherein the retainer is positioned radially inward of a pitch circle of a plurality of balls.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10138230A JPH11325080A (en) | 1998-05-20 | 1998-05-20 | Holder for radial ball bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10138230A JPH11325080A (en) | 1998-05-20 | 1998-05-20 | Holder for radial ball bearing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11325080A true JPH11325080A (en) | 1999-11-26 |
Family
ID=15217140
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10138230A Pending JPH11325080A (en) | 1998-05-20 | 1998-05-20 | Holder for radial ball bearing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11325080A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012052615A (en) * | 2010-09-02 | 2012-03-15 | Ntn Corp | Sealed rolling bearing |
DE102013209288A1 (en) * | 2013-05-21 | 2014-11-27 | Schaeffler Technologies Gmbh & Co. Kg | Rolling element bearing with cage |
DE102013209642A1 (en) * | 2013-05-24 | 2014-11-27 | Schaeffler Technologies Gmbh & Co. Kg | Rolling bearings with accumulation contour sections |
EP2921730B1 (en) * | 2012-11-16 | 2021-12-15 | NTN Corporation | Crown-shaped retainer |
-
1998
- 1998-05-20 JP JP10138230A patent/JPH11325080A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012052615A (en) * | 2010-09-02 | 2012-03-15 | Ntn Corp | Sealed rolling bearing |
EP2921730B1 (en) * | 2012-11-16 | 2021-12-15 | NTN Corporation | Crown-shaped retainer |
DE102013209288A1 (en) * | 2013-05-21 | 2014-11-27 | Schaeffler Technologies Gmbh & Co. Kg | Rolling element bearing with cage |
US9829042B2 (en) | 2013-05-21 | 2017-11-28 | Schaeffler Technologies AG & Co. KG | Rolling element bearing with cage |
DE102013209642A1 (en) * | 2013-05-24 | 2014-11-27 | Schaeffler Technologies Gmbh & Co. Kg | Rolling bearings with accumulation contour sections |
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