JP2738095B2 - Rolling bearing - Google Patents

Rolling bearing

Info

Publication number
JP2738095B2
JP2738095B2 JP1335037A JP33503789A JP2738095B2 JP 2738095 B2 JP2738095 B2 JP 2738095B2 JP 1335037 A JP1335037 A JP 1335037A JP 33503789 A JP33503789 A JP 33503789A JP 2738095 B2 JP2738095 B2 JP 2738095B2
Authority
JP
Japan
Prior art keywords
bearing
rolling
elastic constant
rolling bearing
ball
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
JP1335037A
Other languages
Japanese (ja)
Other versions
JPH03199715A (en
Inventor
大浦　　行雄
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.)
NSK Ltd
Original Assignee
NSK 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=18284037&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP2738095(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to JP1335037A priority Critical patent/JP2738095B2/en
Publication of JPH03199715A publication Critical patent/JPH03199715A/en
Application granted granted Critical
Publication of JP2738095B2 publication Critical patent/JP2738095B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/70—Diameters; Radii
    • F16C2240/76—Osculation, i.e. relation between radii of balls and raceway groove

Landscapes

  • Rolling Contact Bearings (AREA)

Description

【発明の詳細な説明】 「産業上の利用分野」 本発明は使用用途の拡大及び使用条件の苛酷化に伴
い、通常の軸受材料のみでは対応できない分野に使用さ
れる転がり軸受にあって軌道輪や転動体の少なくともひ
とつに弾性定数の大きな材料を採用した転がり軸受の改
良に関するものである。ここで通常の軸受材料とはSUJ
2、SUJ3、M50材浸炭鋼およびステンレス鋼等の金属材料
を言う。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rolling bearing used in a field which cannot be dealt with only by a normal bearing material with the expansion of use applications and severer use conditions. And a rolling bearing using a material having a large elastic constant for at least one of the rolling elements. Here, the normal bearing material is SUJ
2, SUJ3, M50 material refers to metal materials such as carburized steel and stainless steel.

「従来の技術」 近年の使用用途の拡大及び使用条件の苛酷化に伴な
い、軸受性能として耐焼付、耐摩耗、耐熱、低トルク及
び軽量と言った要求が一段と厳しくなつてきている。こ
の様な要求を満足するためには、通常の軸受材料（弾性
定数18000〜22000kgf/mm2）よりも高弾性定数を有する
材料、例えばセラミックス等を採用し、その特性を利用
することが必要な場合がある。[Prior Art] With the recent expansion of use applications and severer use conditions, requirements for bearing performance such as seizure resistance, wear resistance, heat resistance, low torque and light weight are becoming more severe. In order to satisfy such demands, it is necessary to adopt a material having a higher elastic constant than a normal bearing material (elastic constant: 18000 to 22000 kgf / mm 2 ), for example, ceramics, and to utilize its characteristics. There are cases.

「発明が解決しようとする課題」 しかしながら、これらの場合、通常の軸受材料をベー
スにした軸受内部設計のままでは、その効果が十分発揮
できない場合がある。例えば軌道面と転動体の両接触面
の転がり接触面圧を考えた場合、高弾性定数の材料では
通常の軸受材料に比べ転がり接触面圧が大きくなり、転
がり疲れ寿命が低下すると言う問題が発生する。"Problems to be Solved by the Invention" However, in these cases, the effects may not be sufficiently exhibited if the internal bearing design is based on a normal bearing material. For example, when considering the rolling contact surface pressure on both contact surfaces of the raceway surface and the rolling element, there is a problem that the rolling contact surface pressure of a material with a high elastic constant is higher than that of a normal bearing material, and the rolling fatigue life is reduced. I do.

「問題点を解決するための手段」 上記課題を解決するために、以下の技術的構成をとる
ものである。"Means for Solving the Problems" In order to solve the above problems, the following technical configuration is adopted.

外輪と内輪との軌道輪間に複数の転動体を有し、かつ
前記軌道輪および転動体のうち少なくともひとつが、通
常の軸受材料より大きな弾性定数を示す異種材料で構成
される軸受において、前記異種材料の弾性定数を25000k
g/mm2をこえたものとし、かつ内輪および外輪の両方か
又はいずれか一方のみぞ半径を玉径の50％をこえ52％未
満の範囲に設定した転がり軸受としたものである。A bearing having a plurality of rolling elements between races of an outer race and an inner race, and at least one of the races and the races is formed of a dissimilar material having a larger elastic constant than a normal bearing material. 25,000k elastic constant of dissimilar materials
g / mm 2 , and a rolling bearing in which only one or both of the inner ring and the outer ring has a radius set to a range exceeding 50% of the ball diameter and less than 52%.

「作用」 転がり軸受の金属材料として、弾性定数が大きい材料
を採用した場合は、ころがり接触面間の接触面積が小さ
くなり、転がり接触面圧が増大するような作用をするた
め、通常の軸受材料をベースとした内部設計のままで
は、ころがり疲れ寿命が低下する恐れがある。"Operation" When a material having a large elastic constant is used as the metal material of the rolling bearing, the contact area between the rolling contact surfaces is reduced, and the rolling contact surface pressure is increased. If the internal design is based on, the rolling fatigue life may be shortened.

そこで本発明の様に、みぞ半径を小さく選定してやる
ことは、接触面積を増大させ、従って、転がり接触面圧
を小さくすることになり、前述の接触面圧増大を相殺す
る様に作用する。Therefore, as in the present invention, selecting a small groove radius increases the contact area, and thus reduces the rolling contact surface pressure, which acts to offset the above-described increase in the contact surface pressure.

なお、みぞ半径を小さくすることにより、接触面積が
増大し、差動すべりあるいはスピンすべりが増大する傾
向にあるが、すべりが大きくならない様に弾性定数及び
材料物性に応じた最適なみぞ半径を選ぶことができる。By reducing the groove radius, the contact area increases, and the differential slip or spin slip tends to increase.However, an optimal groove radius according to the elastic constant and material properties is selected so that the slip does not increase. be able to.

「実施例」 本発明の一実施例を図面に基づいて説明する。第１図
は通常の軸受材料からなる外輪４と内輪６と両軌道輪間
に介する複数の玉８を有する従来の形式の軸受であっ
て、該軸受は両軌道輪のみぞ半径が標準的なみぞ半径
（外輪のみぞ半径re、内輪のみぞ半径ri、re、ri＝0.52
×玉径）をもって形成されている。"Example" An example of the present invention will be described with reference to the drawings. FIG. 1 shows a conventional type of bearing having an outer ring 4, an inner ring 6, and a plurality of balls 8 interposed between both races made of a normal bearing material. Groove radius (outer ring groove radius re, inner ring groove radius ri, re, ri = 0.52
× ball diameter).

第２図は第１図に示される軸受の内輪６及び外輪４の
みぞ半径を小さく選定（内輪のみぞ半径ｒ′ｉ＝0.515
×玉径 外輪のみぞ半径ｒ′ｅ＝0.51×玉径）し、玉８
の材料の高弾性定数を有するセラミックス材とした本発
明の軸受のである。FIG. 2 shows that the groove radius of the inner ring 6 and the outer ring 4 of the bearing shown in FIG. 1 is selected to be small (the inner groove groove radius r'i = 0.515).
X ball diameter The outer ring has a groove r'e = 0.51 x ball diameter) and ball 8
The bearing of the present invention is a ceramic material having a high elastic constant of the above material.

次に本発明の前記軸受を軸受サイズが内径150mm、外
径210mm、巾30mmの３点接触玉軸受であり、玉径は概略2
0mmとした軸受に適用し、この軸受をスピンすべり及び
差動すべりによる摩耗が発生しやすい試験条件（回転数
14000rpm スラスト荷重3000Kgf）で回転テストを行な
った後の玉の摩耗状況を測定した結果、第３図に示す如
くほとんど摩耗が認められていない。Next, the bearing of the present invention is a three-point contact ball bearing having a bearing size of 150 mm in inner diameter, 210 mm in outer diameter, and 30 mm in width.
Test conditions (rotational speed) where the bearing is applied to a 0 mm bearing and the bearing is liable to wear due to spin sliding and differential sliding
As a result of measuring the wear state of the ball after performing a rotation test at 14000 rpm and a thrust load of 3000 kgf), almost no wear was recognized as shown in FIG.

また上記実施例の軸受を比較のためみぞ半径を前記軸
受と同一とし、玉８の材料をセラミックではなく通常の
軸受材料とした軸受を前記と同一の回転テストを行なっ
た結果第４図に示す如く玉に著しい摩耗がみられた。For comparison, the bearing of the above embodiment was made to have the same groove radius as that of the above-mentioned bearing, and the same rotation test was conducted on the bearing in which the material of the ball 8 was not a ceramic but a normal bearing material. Significant wear was seen on the ball.

「効果」 前述の作用により軸受の転がり疲れ寿命を向上させる
ことができる。"Effect" The rolling fatigue life of the bearing can be improved by the above-described action.

【図面の簡単な説明】[Brief description of the drawings]

第１図は従来例の転がり軸受の概略断面図 第２図は本発明の実施例を示す転がり軸受の概略断面図 第３図は本発明の実施例のセラミックス玉の正常な表面
荒さ及び形状を示すグラフ、第４図は第３図の比較用図
で通常の軸受材料の玉の異常摩耗状況を示すグラフであ
る。 符号の説明 ４・・・外輪 ６・・・内輪 ８・・・玉FIG. 1 is a schematic cross-sectional view of a conventional rolling bearing. FIG. 2 is a schematic cross-sectional view of a rolling bearing showing an embodiment of the present invention. FIG. 3 is a diagram showing the normal surface roughness and shape of the ceramic ball of the embodiment of the present invention. FIG. 4 is a graph for comparison of FIG. 3, and is a graph showing abnormal wear of balls of a normal bearing material. Description of reference numerals 4 ・ ・ ・ Outer ring 6 ・ ・ ・ Inner ring 8 ・ ・ ・ Ball

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】外輪と内輪との両軌道輪間に複数の転動体
を有し、かつ前記軌道輪および転動体のうち少なくとも
ひとつが、通常の軸受材料より、大きな弾性定数を示す
異種材料で構成される転がり軸受において、前記異種材
料の弾性定数を25000kgf/mm2をこえたものとし、かつ内
輪および外輪の両方又はいずれか一方のみぞ半径を玉径
の50％をこえ52％未満の範囲に設定した転がり軸受A plurality of rolling elements are provided between both outer and inner races, and at least one of the races and the rolling bodies is made of a different material having a larger elastic constant than a normal bearing material. In the rolling bearing configured, the elastic constant of the dissimilar material is set to exceed 25,000 kgf / mm 2 , and the radius of the inner ring and / or the outer ring is not less than 50% of the ball diameter and less than 52%. Rolling bearing set to 【請求項２】高弾性定数の異種材料がセラミックスであ
る請求項（１）に記載の転がり軸受2. The rolling bearing according to claim 1, wherein the different material having a high elastic constant is ceramic.
JP1335037A 1989-12-26 1989-12-26 Rolling bearing Expired - Lifetime JP2738095B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1335037A JP2738095B2 (en) 1989-12-26 1989-12-26 Rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1335037A JP2738095B2 (en) 1989-12-26 1989-12-26 Rolling bearing

Publications (2)

Publication Number Publication Date
JPH03199715A JPH03199715A (en) 1991-08-30
JP2738095B2 true JP2738095B2 (en) 1998-04-08

Family

ID=18284037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1335037A Expired - Lifetime JP2738095B2 (en) 1989-12-26 1989-12-26 Rolling bearing

Country Status (1)

Country Link
JP (1) JP2738095B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100245264B1 (en) * 1994-06-30 2000-03-02 김무 Low noise bearing

Also Published As

Publication number Publication date
JPH03199715A (en) 1991-08-30

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