JP4428171B2 - Ball bearing - Google Patents
Ball bearing Download PDFInfo
- Publication number
- JP4428171B2 JP4428171B2 JP2004251355A JP2004251355A JP4428171B2 JP 4428171 B2 JP4428171 B2 JP 4428171B2 JP 2004251355 A JP2004251355 A JP 2004251355A JP 2004251355 A JP2004251355 A JP 2004251355A JP 4428171 B2 JP4428171 B2 JP 4428171B2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- ball bearing
- cage
- annular body
- lubricating oil
- 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 - Fee Related
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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
- F16C33/42—Ball cages made from wire or sheet metal strips
- F16C33/422—Ball cages made from wire or sheet metal strips made from sheet metal
- F16C33/427—Ball cages made from wire or sheet metal strips made from sheet metal from two parts, e.g. ribbon cages with two corrugated annular parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/3831—Ball cages with hybrid structure, i.e. with parts made of distinct materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Description
この発明は、玉軸受に関し、さらに詳しくは、波形保持器を有しかつ潤滑剤が潤滑油である玉軸受に関する。 The present invention relates to a ball bearing, and more particularly to a ball bearing having a corrugated cage and having a lubricant as a lubricant.
玉軸受は、特許文献１に示されているように、玉を保持する保持器が波形保持器とされているものが多数用いられている。
上記波形保持器を有する玉軸受は、潤滑剤がグリースではなく潤滑油とされることがあるが、この場合、空間容積が大きいために、潤滑油による撹拌抵抗が大きく、回転トルクが大きくなるという問題があった。 In the ball bearing having the corrugated cage, the lubricant may be lubricating oil instead of grease. In this case, since the space volume is large, the stirring resistance by the lubricating oil is large, and the rotational torque is large. There was a problem.
この発明の目的は、保持器が波形保持器とされるとともに、潤滑剤が潤滑油である場合に、その回転トルクの低減を可能とする玉軸受を提供することにある。 An object of the present invention is to provide a ball bearing capable of reducing the rotational torque when the cage is a corrugated cage and the lubricant is lubricating oil.
この発明による玉軸受は、外輪、内輪、両輪間に配置された玉、および玉を保持する保持器を備えており、保持器が、平坦部と凸部とが繰り返された環状体が平坦部同士を重ね合わせて結合された波形保持器とされ、潤滑剤が潤滑油とされる玉軸受において、各環状体のすべての平坦部に、凸部同士が突き合わされた部分との厚み差を小さくして潤滑油撹拌抵抗を低減する増厚部が設けられていることを特徴とするものである。 The ball bearing according to the present invention includes an outer ring, an inner ring, a ball disposed between the two rings, and a cage for holding the ball, and the cage has a flat portion formed by repeating a flat portion and a convex portion. In a ball bearing in which the corrugated cages are joined by overlapping each other and the lubricant is lubricating oil, the difference in thickness from the portion where the convex portions are butted against all flat portions of each annular body is reduced. Thus, a thickening portion for reducing the lubricating oil stirring resistance is provided.
回転トルクを増加させる要因としては、玉の転がり抵抗、潤滑油による撹拌抵抗などがあるが、増厚部が設けられることにより、玉が潤滑油中を通過するときに押しのけられる潤滑油の量が減少し、潤滑油撹拌抵抗が小さくなる。 Factors that increase the rotational torque include ball rolling resistance and stir resistance due to lubricating oil, but by providing a thickened part, the amount of lubricating oil displaced when the ball passes through the lubricating oil is reduced. It decreases, and the lubricating oil stirring resistance becomes smaller.
増厚部は、樹脂製で、プレス成形された金属板製の環状体に一体成形されており、増厚部にリベット挿通用の貫通孔が設けられ、環状体同士がリベットにより結合されていることが好ましい。増厚部を樹脂製とすることで、重量の増加が抑えられ、プレス成形された金属板製の環状体に樹脂製増厚部を一体成形することで、環状体への増厚部の接着を確実かつ容易に行うことができ、増厚部にリベット挿通用の貫通孔が設けられて環状体同士がリベットにより結合されていることで、環状体同士を強固に接合することができる。 The thickened portion is made of resin and is integrally formed with a press-formed metal plate annular body. The thickened portion is provided with a through-hole for inserting a rivet, and the annular bodies are connected to each other by a rivet. It is preferable. By making the thickened portion made of resin, an increase in weight is suppressed, and by integrally molding the thickened portion made of resin on the press-formed metal plate annular body, the thickened portion is bonded to the annular body. The through-holes for inserting rivets are provided in the thickened portion and the annular bodies are connected by rivets, so that the annular bodies can be firmly joined.
増厚部の厚みをｈ、玉の直径をＢｄとして、以下の条件が満たされていることが好ましい。 It is preferable that the following conditions are satisfied, where h is the thickness of the thickened portion and Bd is the diameter of the ball.
０．２×Ｂｄ≦ｈ≦０．５×Ｂｄ
ｈ＝０．２×Ｂｄは、撹拌抵抗を小さくする効果を確保するための最小値であり、ｈ＝０．５×Ｂｄは、撹拌抵抗が最小となるときの値であり、ｈ＞０．５×Ｂｄは、ｈ＝０．５×Ｂｄに比べて、重量および撹拌抵抗がともに増加するので好ましくない。
0.2 × Bd ≦ h ≦ 0.5 × Bd
h = 0.2 × Bd is a minimum value for ensuring the effect of reducing the stirring resistance, h = 0.5 × Bd is a value when the stirring resistance is minimum, and h> 0. 5 × Bd is not preferable because both weight and stirring resistance increase compared to h = 0.5 × Bd.
この発明の玉軸受によると、各環状体のすべての平坦部に、凸部同士が突き合わされた部分との厚み差を小さくして潤滑油撹拌抵抗を低減する増厚部が設けられているので、潤滑油による撹拌抵抗が小さくなることで、回転トルクが低減される。 According to the ball bearing of the present invention, since all the flat portions of each annular body are provided with thickening portions that reduce the difference in thickness between the portions where the convex portions are butted together and reduce the lubricating oil stirring resistance. Rotational torque is reduced by reducing the stirring resistance due to the lubricating oil.
この発明の実施の形態を、以下図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図１は、この発明の玉軸受を示しており、玉軸受(1)は、深溝玉軸受で、外輪(2)、内輪(3)、両輪(2)(3)間に配置された玉(4)、および玉(4)を保持する保持器(5)を備えている。 FIG. 1 shows a ball bearing according to the present invention. The ball bearing (1) is a deep groove ball bearing, and a ball (2), an inner ring (3), and a ball (2) (3) disposed between both wheels (3). 4) and a cage (5) for holding the ball (4).
保持器(5)は、図２に示すように、平坦部(11a)と凸部(11b)とが繰り返された環状体(11)が平坦部(11a)同士を重ね合わせて結合されることにより、対向する凸部(11b)同士によって玉(4)と相似形状でかつ玉(4)の曲率半径よりも若干大きな曲率半径を有する凹球面状ポケット(5a)が形成された波形保持器とされている。各環状体(11)は、ＳＰＢ鋼やＳＰＣ鋼などからなる金属プレス成形品製とされている。 As shown in FIG. 2, the retainer (5) has an annular body (11) in which a flat portion (11a) and a convex portion (11b) are repeated and is joined by overlapping the flat portions (11a). The corrugated cage in which the concave spherical pocket (5a) having a shape similar to that of the ball (4) and having a radius of curvature slightly larger than the radius of curvature of the ball (4) is formed by the opposing convex portions (11b). Has been. Each annular body (11) is made of a metal press-formed product made of SPB steel or SPC steel.
各環状体(11)の平坦部(11a)には、凸部(11b)同士が突き合わされた部分との厚み差を小さくして潤滑油撹拌抵抗を低減する増厚部(12)が設けられている。増厚部(12)は、樹脂製で、環状体(11)に一体成形されている。 The flat portion (11a) of each annular body (11) is provided with a thickening portion (12) that reduces the difference in thickness with the portion where the convex portions (11b) are abutted with each other to reduce the lubricating oil stirring resistance. ing. The thickened portion (12) is made of resin and is integrally formed with the annular body (11).
増厚部(12)には、リベット挿通用の貫通孔(12a)が設けられており、図３に示すように、貫通孔(12a)の径がリベット(13)の頭径よりも若干大きく形成され、貫通孔(12a)に挿通されたリベット(13)により環状体(11)同士が直接結合されている。 The thickened portion (12) is provided with a through hole (12a) for inserting a rivet. As shown in FIG. 3, the diameter of the through hole (12a) is slightly larger than the head diameter of the rivet (13). The annular bodies (11) are directly coupled to each other by a rivet (13) formed and inserted through the through hole (12a).
増厚部(12)の厚みは、適宜変更可能であるが、好ましくは、増厚部(12)の厚みをｈ、玉の直径をＢｄとして、以下の条件が満たされているものとされる。 The thickness of the thickened portion (12) can be changed as appropriate. Preferably, the thickness of the thickened portion (12) is h and the diameter of the ball is Bd, and the following conditions are satisfied. .
０．２×Ｂｄ≦ｈ≦０．５×Ｂｄ
増厚部(12)の厚みの最大値（０．５×Ｂｄ）は、増厚部(12)付きの平坦部(11a)の軸方向の幅（２ｔ＋２ｈ，ｔは環状体の厚み）と凸部(11b)における軸方向の幅（２ｔ＋Ｂｄ）とが等しくなる場合に相当しており、このとき撹拌抵抗が最小となる。増厚部(12)の厚みは、保持器(5)の重量増加とのバランスを考慮して、この値以下に設定される。増厚部(12)の厚みは、０．２×Ｂｄ未満になると撹拌抵抗を小さくする効果が減少することから、これ以上とすることが好ましい。
0.2 × Bd ≦ h ≦ 0.5 × Bd
The maximum value (0.5 × Bd) of the thickened portion (12) is the axial width (2t + 2h, t is the thickness of the annular body) of the flat portion (11a) with the thickened portion (12). This corresponds to the case where the axial width (2t + Bd) of the portion (11b) is equal, and the stirring resistance is minimized at this time. The thickness of the thickened portion (12) is set to be equal to or less than this value in consideration of the balance with the weight increase of the cage (5). When the thickness of the thickened portion (12) is less than 0.2 × Bd, the effect of reducing the stirring resistance is reduced, so that the thickness is preferably more than this.
(1) 玉軸受
(2) 外輪
(3) 内輪
(4) 玉
(5) 保持器
(11) 環状体
(11a) 平坦部
(11b) 凸部
(12) 増厚部
(12a) 貫通孔
(13) リベット
(1) Ball bearing
(2) Outer ring
(3) Inner ring
(4) Ball
(5) Cage
(11) Toroid
(11a) Flat part
(11b) Convex
(12) Thickened part
(12a) Through hole
(13) Rivet
Claims (3)
０．２×Ｂｄ≦ｈ≦０．５×Ｂｄ The ball bearing according to claim 1 or 2, wherein the thickness of the thickened portion is h and the diameter of the ball is Bd, and the following conditions are satisfied.
0.2 × Bd ≦ h ≦ 0.5 × Bd
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004251355A JP4428171B2 (en) | 2004-08-31 | 2004-08-31 | Ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004251355A JP4428171B2 (en) | 2004-08-31 | 2004-08-31 | Ball bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2006070910A JP2006070910A (en) | 2006-03-16 |
| JP4428171B2 true JP4428171B2 (en) | 2010-03-10 |
Family
ID=36151768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004251355A Expired - Fee Related JP4428171B2 (en) | 2004-08-31 | 2004-08-31 | Ball bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4428171B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5612946B2 (en) * | 2010-07-23 | 2014-10-22 | Ntn株式会社 | Corrugated cage for ball bearings |
| IT202300016185A1 (en) * | 2023-08-01 | 2025-02-01 | Skf Ab | CAGE FOR ROLLING BEARINGS AND HIGH SPEED BEARING EQUIPPED WITH SUCH A CAGE |
-
2004
- 2004-08-31 JP JP2004251355A patent/JP4428171B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006070910A (en) | 2006-03-16 |
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