JP2000018257A - Crown type holder - Google Patents
Crown type holderInfo
- Publication number
- JP2000018257A JP2000018257A JP10182240A JP18224098A JP2000018257A JP 2000018257 A JP2000018257 A JP 2000018257A JP 10182240 A JP10182240 A JP 10182240A JP 18224098 A JP18224098 A JP 18224098A JP 2000018257 A JP2000018257 A JP 2000018257A
- Authority
- JP
- Japan
- Prior art keywords
- crown
- solid lubricant
- composite solid
- ball
- mixing ratio
- 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
- F16C33/44—Selection of substances
-
- 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
- F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
-
- 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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/52—Alloys based on nickel, e.g. Inconel
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】本発明は、玉軸受に用いられ
る冠形保持器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crown cage used for a ball bearing.
【０００２】[0002]
【従来の技術】従来、潤滑油を使用できない特殊環境で
用いられる玉軸受の冠形保持器として、本願出願人は、
例えばグラファイトを主成分とする固体潤滑剤で成型し
たものを提案している。2. Description of the Related Art Conventionally, as a crown type retainer for a ball bearing used in a special environment where lubricating oil cannot be used, the present applicant has
For example, it has been proposed to mold with a solid lubricant containing graphite as a main component.
【０００３】冠形保持器とは、ポケットの一部が軸方向
一端に向けて開口した形状のものであり、通常、玉軸受
の玉に対する軸方向での脱落を防止するために、ポケッ
トの開口幅（周方向長さ）を玉の直径よりも小さく設定
している。[0003] The crown type retainer has a shape in which a part of the pocket is opened toward one end in the axial direction. Usually, in order to prevent the ball of the ball bearing from dropping off in the axial direction, the opening of the pocket is formed. The width (length in the circumferential direction) is set smaller than the diameter of the ball.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上述したよ
うなグラファイト材は、靭性および強度に乏しく脆弱で
あるため、冠形保持器のポケットに玉を収容するとき
や、運転中に玉が衝突したときなどに割れやすいといっ
た欠点がある。However, the above-described graphite material has poor toughness and strength and is brittle, so that the ball collides when the ball is stored in the pocket of the crown retainer or during operation. There is a disadvantage that it is easily broken at times.
【０００５】これに対しては、本願出願人は、特開平１
−１２６４２６号公報に示すように、冠形保持器のポケ
ットの開口幅を玉の直径の９７〜９９％にと可及的に大
きく設定することにより、玉組み込み時の変形量を少な
くさせる他、冠形保持器のポケットの存在する部分での
軸方向最小幅部分を可及的に幅広に設定することによ
り、強度アップを図るようにしている。On the other hand, the applicant of the present application has disclosed in
As shown in JP-A-126426, by setting the opening width of the pocket of the crown-shaped cage as large as possible from 97 to 99% of the diameter of the ball, the amount of deformation at the time of assembling the ball is reduced. The strength is increased by setting the minimum axial width of the crown retainer in the portion where the pocket exists as wide as possible.
【０００６】この他、グラファイト材そのものは、本
来、摩耗量が多いなど、耐久性が低いことが指摘され
る。[0006] In addition, it is pointed out that the graphite material itself has low durability, such as a large amount of wear.
【０００７】このように、従来のグラファイト製の冠形
保持器については、強度、靭性、耐久性を考慮すると、
軽荷重、低速回転という条件での使用に限定されるのが
現状である。As described above, regarding the conventional graphite crown retainer, considering the strength, toughness and durability,
At present, it is limited to use under conditions of light load and low speed rotation.
【０００８】したがって、本発明は、自己潤滑性を有す
る冠形保持器において、強度、靭性、耐久性の向上を図
ることを目的としている。Accordingly, an object of the present invention is to improve strength, toughness, and durability of a self-lubricating crown cage.
【０００９】[0009]
【課題を解決するための手段】請求項１の発明にかかる
冠形保持器は、ニッケル系金属中に、窒化ほう素および
グラファイトを主成分とする複合固体潤滑剤が分散混合
された形態で成型されてなる。According to a first aspect of the present invention, there is provided a crown-shaped cage formed by dispersing and mixing a composite solid lubricant containing boron nitride and graphite as main components in a nickel-based metal. Be done.
【００１０】請求項２の発明にかかる冠形保持器は、上
記請求項１において、前記複合固体潤滑剤が、４０〜６
０ｗｔ％の割合に設定されている。According to a second aspect of the present invention, in the crown retainer according to the first aspect, the composite solid lubricant is 40 to 6%.
The ratio is set to 0 wt%.
【００１１】請求項３の発明にかかる冠形保持器は、上
記請求項１，２において、円周数カ所に設けられるポケ
ットの周方向両側部分における複合固体潤滑剤の混合割
合が他の部分に比べて多く設定されている。According to a third aspect of the present invention, in the crown retainer according to the first and second aspects, the mixing ratio of the composite solid lubricant in the circumferentially opposite side portions of the pockets provided at several places around the circumference is compared with other portions. Many are set.
【００１２】請求項４の発明にかかる冠形保持器は、上
記請求項１，２において、円周数カ所に設けられるポケ
ットの周方向両側部分における複合固体潤滑剤の混合割
合が、ポケット存在部分での軸方向最小幅部分における
複合固体潤滑剤の混合割合に比べて多く設定されてい
る。According to a fourth aspect of the present invention, there is provided the crowned cage according to the first and second aspects, wherein the mixing ratio of the composite solid lubricant in the circumferentially opposite side portions of the pockets provided at several places on the circumference is equal to that of the pocket existing portion. Is set higher than the mixing ratio of the composite solid lubricant in the minimum width portion in the axial direction.
【００１３】請求項５の発明にかかる冠形保持器は、上
記請求項３において、ポケット内面を含む部分における
複合固体潤滑剤の混合割合が前記数値範囲の上限側に設
定され、ポケット存在部分での軸方向最小幅部分が前記
数値範囲の下限側に設定されている。According to a fifth aspect of the present invention, in the crown retainer according to the third aspect, the mixing ratio of the composite solid lubricant in the portion including the inner surface of the pocket is set to the upper limit side of the numerical range, and in the portion where the pocket exists. Is set at the lower limit of the numerical range.
【００１４】以上、本発明の冠形保持器は、要するに、
強度、靭性に優れたニッケル系金属をベースとして、潤
滑性に優れた複合固体潤滑剤を分散混合した形態になっ
ている。As described above, the crown-shaped cage of the present invention is basically
It is a form in which a composite solid lubricant excellent in lubricity is dispersed and mixed based on a nickel-based metal excellent in strength and toughness.
【００１５】これにより、従来例のグラファイト製の冠
形保持器に比べて靭性が向上するので、例えばポケット
へ玉軸受の玉を組み込むときに、撓みやすくなって割れ
にくくなる他、ポケット内で玉が衝突したときに、衝撃
を吸収しやすくなって割れにくくなる。このようなこと
から、ポケットの開口幅を、従来例に比べて幅狭にでき
るようになるなど、成型時の形状精度を低く管理できる
ようになる。また、冠形保持器のポケット部分の軸方向
最小幅部分の軸方向幅を従来のグラファイト保持器に比
べて幅狭にできるようになるなど、軸受の小型化が可能
になる。As a result, the toughness is improved as compared with the conventional crown-shaped cage made of graphite. For example, when a ball of a ball bearing is incorporated in a pocket, the ball is easily bent and hardly broken, and the ball is held in the pocket. When a collision occurs, the impact is easily absorbed, and it is difficult to break. For this reason, the shape precision at the time of molding can be controlled to be low, for example, the opening width of the pocket can be made narrower than in the conventional example. Further, the bearing can be miniaturized, for example, the axial width of the minimum axial width portion of the pocket portion of the crown-shaped cage can be made narrower than that of the conventional graphite cage.
【００１６】この他、玉軸受の玉や軌道輪に対する摺接
時の滑性、耐久性についても良好となるが、特に、複合
固体潤滑剤の混合割合について、請求項２のように特定
すると、一層向上する。In addition, the lubrication and durability of the ball bearing in contact with the ball and the race are improved, but the mixing ratio of the composite solid lubricant is particularly specified as follows. Further improve.
【００１７】[0017]
【発明の実施の形態】本発明の詳細を図面に示す実施形
態に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described based on embodiments shown in the drawings.
【００１８】図１ないし図６は本発明の一実施形態にか
かり、図１は、冠形保持器の斜視図、図２は、冠形保持
器の縦断側面図、図３は、冠形保持器を用いた深溝玉軸
受の縦断側面図、図４は、軸受の試験装置を示す概略構
成図、図５は、軸受の摩擦トルクの試験結果を示す図
表、図６は、保持器の摩耗量の試験結果を示す図表であ
る。なお、ここで保持器の摩耗量は、試験前後で保持器
の重量測定を行い求めたものである。1 to 6 relate to an embodiment of the present invention. FIG. 1 is a perspective view of a crown-shaped cage, FIG. 2 is a longitudinal side view of the crown-shaped cage, and FIG. FIG. 4 is a schematic configuration diagram showing a test device for a bearing, FIG. 5 is a table showing test results of friction torque of the bearing, and FIG. 6 is a wear amount of a cage. 6 is a table showing the test results. Here, the wear amount of the cage was obtained by measuring the weight of the cage before and after the test.
【００１９】図中、１は冠形保持器の全体を示してい
る。この冠形保持器１は、冠形の形状を有しており、円
周数カ所に放射方向に貫通するとともに軸方向一方に開
口するポケット２が設けられている。このポケット２の
存在により、当該ポケット２それぞれの間には、突片３
が存在する結果になっている。In the figure, reference numeral 1 denotes the entire crown holder. The crown retainer 1 has a crown shape, and has pockets 2 penetrating radially and opening in one axial direction at several circumferential positions. Due to the existence of the pockets 2, the projecting pieces 3
Has resulted in the existence.
【００２０】そして、この冠形保持器１は、例えば、図
３に示すような深溝玉軸受１０に用いられる。図３にお
いて、１１は内輪、１２は外輪、１３は転動体としての
玉である。この深溝玉軸受１０を、例えば潤滑油を使用
できない特殊環境で使用する場合だと、玉１３あるいは
内・外輪１１，１２の少なくともいずれか一方をセラミ
ックスで形成するのが好ましい。この場合、冠形保持器
１は、その案内形態に関係なく玉１３に対して摺接する
ことになるが、内輪案内または外輪案内とする場合だ
と、玉１３の他に、内輪１１または外輪１２に対しても
摺接することになる。この摺接により、冠形保持器１か
ら適宜摩耗粉が発生し、この摩耗粉が軸受各部に転移
し、潤滑作用を果たすことになる。The crown type cage 1 is used, for example, in a deep groove ball bearing 10 as shown in FIG. In FIG. 3, 11 is an inner ring, 12 is an outer ring, and 13 is a ball as a rolling element. For example, when the deep groove ball bearing 10 is used in a special environment where lubricating oil cannot be used, it is preferable that at least one of the ball 13 and the inner / outer rings 11 and 12 is formed of ceramics. In this case, the crown-shaped cage 1 comes into sliding contact with the ball 13 irrespective of the guide form. However, when the inner ring guide or the outer ring guide is used, in addition to the ball 13, the inner ring 11 or the outer ring 12 Will also come into sliding contact with. Due to this sliding contact, abrasion powder is appropriately generated from the crown-shaped cage 1, and the abrasion powder is transferred to each part of the bearing, thereby performing a lubricating action.
【００２１】ところで、この実施形態の冠形保持器１
は、ニッケル系金属中に、窒化ほう素およびグラファイ
トを主成分とする複合固体潤滑剤が分散混合された形態
で成型される。なお、複合固体潤滑剤の混合割合は、４
０〜６０ｗｔ％に設定するのが好ましい。この数値は、
下記する試験結果に基づいて特定されている。複合固体
潤滑剤は、いわゆるボロンナイトライド（ＢＮ）と呼ば
れる窒化ほう素およびグラファイトを主成分とし、適宜
ＭｏＳ2、Ａｕ、Ａｇ、Ｐｂなどを添加してもよい。By the way, the crown type retainer 1 of this embodiment
Is molded in a form in which a composite solid lubricant containing boron nitride and graphite as main components is dispersed and mixed in a nickel-based metal. The mixing ratio of the composite solid lubricant is 4
It is preferable to set it to 0 to 60 wt%. This number is
It has been identified based on the following test results. The composite solid lubricant mainly contains boron nitride (so-called boron nitride (BN)) and graphite, and may appropriately contain MoS 2 , Au, Ag, Pb, or the like.
【００２２】このような冠形保持器１の材料に関する物
性ならびに軸受性能を調べたので説明する。The physical properties and bearing performance of the material of such a crown-shaped cage 1 have been examined and will be described.
【００２３】ここでは、上述した材料で成型した試験片
を用いており、試験片としても複合固体潤滑剤の混合割
合を変えた５種類を用意した。複合固体潤滑剤の混合割
合は、試験片ａで７０ｗｔ％、試験片ｂで６０ｗｔ％、
試験片ｃで５０ｗｔ％、試験片ｄで４０ｗｔ％、試験片
ｅで３０ｗｔ％としている。In this case, test pieces molded from the above-mentioned materials were used, and five kinds of test pieces having different mixing ratios of the composite solid lubricant were prepared. The mixing ratio of the composite solid lubricant was 70 wt% for the test piece a, 60 wt% for the test piece b,
The test piece c has 50 wt%, the test piece d has 40 wt%, and the test piece e has 30 wt%.
【００２４】まず、物性については、下記表１のように
なった。First, the physical properties are as shown in Table 1 below.
【００２５】[0025]
【表１】 [Table 1]
【００２６】このように、複合固体潤滑剤の混合割合を
少なくするに従い、強度、靭性が向上することが分か
る。Thus, it can be seen that the strength and toughness are improved as the mixing ratio of the composite solid lubricant is reduced.
【００２７】次に、図４に示す試験装置を用いて、軸受
性能を調べた。本試験機は試験軸受を室温から高温まで
の雰囲気で、アキシアル荷重を与えて運転するもので、
試験軸受の駆動は変速モータにより増速機を介して行わ
れる。アキシアル荷重はおもりとてこの組合せにより、
軸受の側面から負荷される。試験中の軸受の摩擦トルク
は、トルクメータで測定し記録した。試験軸受は、ＪＩ
Ｓ規格呼び番号６２０４相当の深溝玉軸受で、内・外
輪、玉に窒化けい素を用い、保持器は本発明品である複
合固体潤滑剤が分散混合された冠型保持器を使用してい
る。試験条件はアキシアル荷重３９２Ｎ、回転数１００
０ｒｐｍで、室温にて試験を行った。Next, the bearing performance was examined using the test apparatus shown in FIG. This tester operates a test bearing in an atmosphere from room temperature to high temperature with an axial load applied.
The driving of the test bearing is performed by a speed-change motor via a gearbox. Axial load is calculated by this combination of weight and lever.
Loaded from the side of the bearing. The friction torque of the bearing during the test was measured and recorded with a torque meter. The test bearing is JI
This is a deep groove ball bearing equivalent to S standard nominal number 6204, using silicon nitride for the inner and outer rings and balls, and using a crown type cage in which the composite solid lubricant of the present invention is dispersed and mixed. . The test conditions were an axial load of 392 N and a rotation speed of 100.
The test was performed at 0 rpm at room temperature.
【００２８】第１に、軸受の摩擦トルクつまり滑性につ
いては、図５に示すように、試験片ａ〜ｄのように複合
固体潤滑剤の混合割合を４０ｗｔ％以上にした場合につ
いては、試験開始直後は若干摩擦トルクが高いが、すぐ
に摩擦トルクが０．０１前後ときわめて低い状態とな
り、そのまま３時間を過ぎてもほぼ変化がなかったのに
対し、試験片ｅのように複合固体潤滑剤の混合割合を３
０ｗｔ％にした場合は、摩擦トルクが安定した状態で
０．０２になり、２時間３０分を経過したあたりで摩擦
トルクが０．０３を越えるまで急増した。このように、
複合固体潤滑剤の混合割合を多くするに従い、摩擦トル
クが低減する傾向となるものの、混合割合が４０ｗｔ％
以上では摩擦トルクの低下割合が飽和することになる。First, as shown in FIG. 5, the frictional torque of the bearing, that is, the lubricity, was measured when the mixing ratio of the composite solid lubricant was 40 wt% or more as shown in test pieces a to d. Immediately after the start, the friction torque was slightly high, but immediately the friction torque was extremely low at around 0.01. There was almost no change even after 3 hours. Mixing ratio of 3
In the case of 0 wt%, the friction torque was 0.02 in a stable state, and increased rapidly until the friction torque exceeded 0.03 after about 2 hours and 30 minutes. in this way,
As the mixing ratio of the composite solid lubricant increases, the friction torque tends to decrease, but the mixing ratio is 40 wt%.
Above, the reduction rate of the friction torque is saturated.
【００２９】第２に、摩耗量つまり耐久性については、
図６に示すように、いずれの試験片ａ〜ｅも時間経過に
伴い摩耗が進展するのに変わりないが、試験片ａのよう
に複合固体潤滑剤の混合割合を７０ｗｔ％にした場合の
みが１時間３０分の経過で１．５ｇと摩耗進展が早かっ
たのに対し、試験片ｂ〜ｅのように複合固体潤滑剤の混
合割合を６０ｗｔ％以下にした場合については、３時間
経過しても０．５ｇ前後と摩耗進展が遅くなっている。
このように、複合固体潤滑剤の混合割合を少なくするに
従い、摩耗量が減る傾向となるものの、混合割合が６０
ｗｔ％以下では摩耗量に大きな差はみられない。また試
験片ｅでは、摩耗量は少ないものの軸受のトルクが高い
ため実用上好ましくない。Second, regarding the amount of wear, that is, durability,
As shown in FIG. 6, the wear of any of the test pieces a to e continues to progress with time, but only when the mixing ratio of the composite solid lubricant is 70 wt% as in the case of the test piece a. While the wear progressed as fast as 1.5 g after 1 hour and 30 minutes, 3 hours passed when the mixing ratio of the composite solid lubricant was set to 60 wt% or less as in test pieces b to e. Also, the wear progress is slow at around 0.5 g.
Thus, as the mixing ratio of the composite solid lubricant is reduced, the amount of wear tends to decrease, but the mixing ratio is 60%.
At less than wt%, no significant difference is observed in the amount of wear. Further, the test piece e has a small amount of wear but has a high bearing torque, which is not practically preferable.
【００３０】このような結果に基づき、複合固体潤滑剤
の混合割合を上述したように４０〜６０ｗｔ％の範囲に
設定するのが好ましいと考えた。Based on these results, it was considered preferable to set the mixing ratio of the composite solid lubricant in the range of 40 to 60 wt% as described above.
【００３１】ところで、上記表１に示すように冠形保持
器１の強度や靭性を向上できるのであれば、そのポケッ
ト２の開口幅Ｗを、玉１３の直径Ｄの９４〜９９％の大
きさにと、下限値を下げることができる。このようにポ
ケット２の開口幅Ｗの設定範囲を広げることができるの
で、従来例に比べて成型時の形状精度を比較的低く管理
できるようになり、製造コストの低減に貢献できるよう
になる。また、上述したような冠形保持器１において、
そのポケット２の存在する領域の軸方向最小幅部分の軸
方向幅寸法Ｌを、従来のグラファイト保持器と比較して
小さくすることができる。つまり、軸方向最小幅部分の
軸方向幅寸法Ｌを小さく設定しても、冠形保持器１の最
弱部分の破損を回避できるようになることを意味してお
り、軸受の小型化に貢献できるようになる。If the strength and toughness of the crown-shaped cage 1 can be improved as shown in Table 1 above, the opening width W of the pocket 2 should be 94 to 99% of the diameter D of the ball 13. The lower limit can be lowered. As described above, since the setting range of the opening width W of the pocket 2 can be widened, the shape accuracy at the time of molding can be controlled relatively low as compared with the conventional example, thereby contributing to a reduction in manufacturing cost. Further, in the crown type cage 1 as described above,
The axial width L of the minimum axial width portion of the region where the pocket 2 exists can be reduced as compared with the conventional graphite retainer. That is, even if the axial width L of the axial minimum width portion is set small, it is possible to prevent the weakest portion of the crown-shaped cage 1 from being damaged, which contributes to downsizing of the bearing. become able to.
【００３２】なお、上記試験結果に基づき、上記実施形
態のように、冠型保持器１の全体を上記数値範囲で任意
に固定した値に設定するのではなく、冠型保持器１にお
いて滑性が必要な部位や強度が必要な部位など機能的に
分けて、これら各部位での複合固体潤滑剤の混合割合を
それぞれ異ならせるようにするのが好ましい。例えば、
ポケット２の周方向両側つまり隣り合うポケット２間に
存在する突片３における複合固体潤滑剤の混合割合が前
記数値範囲の上限側に設定され、ポケット存在部分での
軸方向最小幅部分の周方向全体（図２においてドット模
様を付す領域）が前記数値範囲の下限側に設定した実施
形態としてもよい。It is to be noted that, based on the above test results, instead of setting the entire crown type cage 1 to an arbitrarily fixed value in the above numerical range as in the above embodiment, the crown type cage 1 has lubricity. However, it is preferable to functionally divide the components such as a portion requiring the above and a portion requiring the strength so that the mixing ratio of the composite solid lubricant in each of these portions is different from each other. For example,
The mixing ratio of the composite solid lubricant in the protruding pieces 3 present on both sides in the circumferential direction of the pocket 2, that is, between the adjacent pockets 2, is set to the upper limit side of the numerical range, and the circumferential direction of the axially minimum width portion in the pocket existing portion is set. An embodiment in which the entirety (the area with a dot pattern in FIG. 2) is set on the lower limit side of the numerical range may be adopted.
【００３３】なお、本発明は上記実施形態のみに限定さ
れるものではなく、種々な応用や変形が考えられる。例
えば、冠形保持器１の細かい部分の形状については、特
に限定されない。It should be noted that the present invention is not limited to only the above embodiment, and various applications and modifications are conceivable. For example, the shape of the fine portion of the crown-shaped cage 1 is not particularly limited.
【００３４】[0034]
【発明の効果】請求項１および４の発明にかかる冠形保
持器は、強度、靭性が従来例に比べて向上するととも
に、玉軸受の玉や軌道輪に対する摺接時の滑性、耐久性
についても向上する。特に、複合固体潤滑剤の混合割合
について、請求項２のように特定すると、滑性、耐久性
が一層向上する。さらに、複合固体潤滑剤の混合割合に
ついて、請求項３のように特定すると、特にポケット内
面に対する玉の摺接時の滑性が一層向上し、また、冠型
保持器の構造的最弱部分の強度が一層向上することにな
る。The crowned cage according to the first and fourth aspects of the present invention has improved strength and toughness as compared with the conventional example, and has good slipperiness and durability at the time of sliding contact with the ball and the race of the ball bearing. Also improve. In particular, when the mixing ratio of the composite solid lubricant is specified as in claim 2, lubricity and durability are further improved. Further, when the mixing ratio of the composite solid lubricant is specified as in claim 3, the lubricity particularly when the ball slides against the inner surface of the pocket is further improved, and the structurally weakest part of the crown type cage is improved. The strength will be further improved.
【００３５】このため、例えばポケットへ転動体として
の玉を組み込むときに、撓みやすくなって割れにくくな
る他、転動体としての玉が衝突したときに、衝撃を吸収
しやすくなって割れにくくなる。これにより、ポケット
の開口幅を、従来例に比べて幅狭にできるようになるな
ど、成型時の形状精度を低く管理できるようになる。ま
た、冠形保持器のポケット部分の軸方向最小幅部分の軸
方向幅を従来例に比べて幅狭にできるようになるなど、
軸受の小型化が可能になる。For this reason, for example, when a ball as a rolling element is incorporated into a pocket, the ball is easily bent and hardly broken, and when a ball as a rolling element collides, an impact is easily absorbed and hardly broken. As a result, the opening width of the pocket can be made narrower than that of the conventional example, and the shape accuracy at the time of molding can be controlled to be low. In addition, the axial width of the axial minimum width portion of the pocket portion of the crown retainer can be made narrower than in the conventional example.
The size of the bearing can be reduced.
【図１】本発明の一実施形態の冠形保持器の斜視図FIG. 1 is a perspective view of a crown cage according to an embodiment of the present invention.
【図２】図１の冠形保持器の縦断側面図FIG. 2 is a longitudinal side view of the crown type cage of FIG. 1;
【図３】図１の冠形保持器を用いた深溝玉軸受の縦断側
面図FIG. 3 is a longitudinal sectional side view of a deep groove ball bearing using the crown type cage of FIG. 1;
【図４】軸受の試験装置を示す概略構成図FIG. 4 is a schematic configuration diagram showing a bearing test apparatus.
【図５】摩擦トルクの試験結果を示す図表FIG. 5 is a table showing test results of friction torque.
【図６】摩耗量の試験結果を示す図表FIG. 6 is a table showing test results of the amount of wear.
１ 冠形保持器 ２ ポケット ３ 突片 １０ 深溝玉軸受 １１ 内輪 １２ 外輪 １３ 転動体 DESCRIPTION OF SYMBOLS 1 Crown retainer 2 Pocket 3 Projection piece 10 Deep groove ball bearing 11 Inner ring 12 Outer ring 13 Rolling element
Claims (5)
グラファイトを主成分とする複合固体潤滑剤が分散混合
された形態で成型されてなる、ことを特徴とする冠形保
持器。1. A crown-shaped retainer formed by dispersing and mixing a composite solid lubricant containing boron nitride and graphite as main components in a nickel-based metal.
前記複合固体潤滑剤が、４０〜６０ｗｔ％の割合に設定
されている、ことを特徴とする冠形保持器。2. The crown retainer according to claim 1, wherein
The crown retainer, wherein the composite solid lubricant is set at a ratio of 40 to 60 wt%.
て、円周数カ所に設けられるポケットの周方向両側部分
における複合固体潤滑剤の混合割合が他の部分に比べて
多く設定されている、ことを特徴とする冠形保持器。3. The crown-shaped cage according to claim 1, wherein the mixing ratio of the composite solid lubricant is set to be larger in both circumferential portions of the pockets provided at several places around the circumference than in the other portions. A crown-shaped retainer.
て、円周数カ所に設けられるポケットの周方向両側部分
における複合固体潤滑剤の混合割合が、ポケット存在部
分での軸方向最小幅部分における複合固体潤滑剤の混合
割合に比べて多く設定されている、ことを特徴とする冠
形保持器。4. The crown cage according to claim 1, wherein the mixing ratio of the composite solid lubricant in the circumferentially opposite side portions of the pockets provided at several locations on the circumference is the minimum width in the axial direction at the pocket existing portion. A crown retainer, wherein the ratio is set higher than a mixing ratio of the composite solid lubricant in the portion.
ポケット内面を含む部分における複合固体潤滑剤の混合
割合が前記数値範囲の上限側に設定され、ポケット存在
部分での軸方向最小幅部分が前記数値範囲の下限側に設
定されている、ことを特徴とする冠形保持器。5. The crown retainer according to claim 3, wherein
The mixing ratio of the composite solid lubricant in the portion including the pocket inner surface is set at the upper limit of the numerical range, and the axial minimum width portion at the pocket existing portion is set at the lower limit of the numerical range. And a crown cage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10182240A JP2000018257A (en) | 1998-06-29 | 1998-06-29 | Crown type holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10182240A JP2000018257A (en) | 1998-06-29 | 1998-06-29 | Crown type holder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000018257A true JP2000018257A (en) | 2000-01-18 |
Family
ID=16114803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10182240A Pending JP2000018257A (en) | 1998-06-29 | 1998-06-29 | Crown type holder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000018257A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013064094A (en) * | 2011-09-16 | 2013-04-11 | Fuji Dies Kk | Solid solution-strengthened or solid solution-strengthened and/or dispersion-strengthened metal-based self-lubricating composite material |
-
1998
- 1998-06-29 JP JP10182240A patent/JP2000018257A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013064094A (en) * | 2011-09-16 | 2013-04-11 | Fuji Dies Kk | Solid solution-strengthened or solid solution-strengthened and/or dispersion-strengthened metal-based self-lubricating composite material |
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