JP2009024822A - Crown type cage for ball bearing - Google Patents

Crown type cage for ball bearing Download PDF

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Publication number
JP2009024822A
JP2009024822A JP2007190452A JP2007190452A JP2009024822A JP 2009024822 A JP2009024822 A JP 2009024822A JP 2007190452 A JP2007190452 A JP 2007190452A JP 2007190452 A JP2007190452 A JP 2007190452A JP 2009024822 A JP2009024822 A JP 2009024822A
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Japan
Prior art keywords
grease
pocket
crown type
type cage
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
Application number
JP2007190452A
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Japanese (ja)
Inventor
Hikari Ishida
光 石田
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2007190452A priority Critical patent/JP2009024822A/en
Publication of JP2009024822A publication Critical patent/JP2009024822A/en
Pending legal-status Critical Current

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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
    • F16C33/41—Ball cages comb-shaped
    • F16C33/412—Massive or moulded comb cages, e.g. snap ball 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or 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
    • 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
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
    • 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

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crown type cage for a ball bearing, without increasing a torque loss when the bearing rotates, by stably supplying grease to a pocket inner surface from a grease passage. <P>SOLUTION: A circular arc part 2a forming a pocket 3 and a grease storage part 4 hollowed in along a connecting part 2b connecting the adjacent circular arc part 2a, are arranged in a thickness central part in the radial direction on the opposite side of an opening 3a of the pocket 3 of an annular body 2. The outflow of the grease from the grease storage part 4 by gravity and centrifugal force, is prevented by installing an annular cover member 5 for enclosing these grease storage parts 4 except for a part of the grease passage 6, and the grease can be stably supplied to the inner surface of the pocket 3 from the grease passage 6, and the torque loss is not increased when the bearing rotates. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、玉軸受用の冠型保持器に関する。   The present invention relates to a crown type cage for ball bearings.

環状体の円周方向複数箇所に、軸方向の一方向に開口し、玉軸受のボールを収納するポケットを設けた玉軸受用の冠型保持器は、ポケットの内面がボールの表面に沿う球面とされているので、ポケット内面とボールとの間にグリースが供給され難く、これらの間で油膜切れが生じやすい。このような冠型保持器のポケット内面とボール間での油膜切れを防止する手段としては、ポケットの外側に設けたグリース溜め部から各ポケットの内面に連通するグリース通路を設けたものが提案されている（例えば、特許文献１参照）。特許文献１に記載された冠型保持器は、環状体のポケットの開口側で、隣り合うポケットの舌片間をグリース溜め部としている。   A crown type cage for ball bearings, which is provided with a pocket that opens in one axial direction at a plurality of locations in the circumferential direction of the annular body and accommodates a ball of the ball bearing, is a spherical surface whose inner surface is along the surface of the ball. Therefore, it is difficult for grease to be supplied between the pocket inner surface and the ball, and oil film breakage tends to occur between them. As a means for preventing oil film breakage between the pocket inner surface and the ball of such a crown type cage, a grease passage that communicates from the grease reservoir provided on the outer side of the pocket to the inner surface of each pocket has been proposed. (For example, refer to Patent Document 1). The crown type cage described in Patent Document 1 has a grease reservoir between the tongues of adjacent pockets on the opening side of the annular pocket.

特開平１０−２１３１３９号公報JP-A-10-213139

特許文献１に記載された玉軸受用冠型保持器は、ポケットの舌片間のグリース溜め部が開放されているので、グリース溜め部に溜められたグリースが重力や軸受回転に伴う遠心力等によって流出すると、グリース通路からポケット内面にグリースを供給できなくなる問題がある。また、グリース溜め部から流出するグリース量が多くなると、流出したグリースが軸受回転時の撹拌抵抗となってトルクロスが増大する問題もある。   In the crown type cage for ball bearings described in Patent Document 1, since the grease reservoir between the tongues of the pocket is opened, the grease accumulated in the grease reservoir is subjected to gravity, centrifugal force associated with bearing rotation, etc. If this occurs, there is a problem that grease cannot be supplied from the grease passage to the inner surface of the pocket. In addition, when the amount of grease flowing out from the grease reservoir increases, there is a problem that the outflowed grease becomes a stirring resistance during rotation of the bearing and the torque loss increases.

そこで、本発明の課題は、グリース通路からポケット内面にグリースを安定して供給でき、軸受回転時のトルクロスを増大させることのない玉軸受用冠型保持器を提供することである。   Accordingly, an object of the present invention is to provide a crown type cage for a ball bearing that can stably supply grease from the grease passage to the inner surface of the pocket and does not increase the torque cross during rotation of the bearing.

上記の課題を解決するために、本発明は、環状体の円周方向複数箇所に、軸方向の一方向に開口し、玉軸受のボールを収納するポケットを設け、これらのポケットの外側に設けたグリース溜め部から各ポケットの内面に連通するグリース通路を設けた玉軸受用冠型保持器において、前記グリース溜め部が前記グリース通路の部分を除いて閉塞した空間内に設けられた構成を採用した。   In order to solve the above-mentioned problems, the present invention provides pockets that are opened in one axial direction and accommodate balls of ball bearings at a plurality of locations in the circumferential direction of the annular body, and are provided outside these pockets. In a crown type cage for ball bearings with a grease passage communicating from the grease reservoir to the inner surface of each pocket, the grease reservoir is provided in a closed space except for the grease passage. did.

すなわち、グリース溜め部をグリース通路の部分を除いて閉塞した空間内に設けることにより、重力や遠心力等によるグリース溜め部からのグリースの流出を防止し、グリース通路からポケット内面にグリースを安定して供給できるようにするとともに、軸受回転時のトルクロスが増大しないようにした。   In other words, by providing the grease reservoir in a closed space except for the grease passage, it is possible to prevent the grease from flowing out of the grease reservoir due to gravity, centrifugal force, etc., and to stabilize the grease from the grease passage to the pocket inner surface. The torque is not increased when the bearings are rotated.

前記閉塞した空間を、前記ポケットの外側に設けたグリース溜め部を囲うように装着した蓋部材で形成することにより、グリース溜め部を設けた閉塞した空間を容易に形成することができる。   By forming the closed space with a lid member attached so as to surround the grease reservoir provided outside the pocket, the closed space provided with the grease reservoir can be easily formed.

前記グリース溜め部を前記環状体の前記ポケットの開口側と反対側に設けることにより、大容量のグリース溜め部を形成することができる。   By providing the grease reservoir on the side opposite to the opening side of the pocket of the annular body, a large-capacity grease reservoir can be formed.

前記グリース溜め部を円周方向の複数箇所に設け、これらのグリース溜め部を互いに連通することにより、各ポケット内に満遍なくグリースを供給することができる。   By providing the grease reservoirs at a plurality of locations in the circumferential direction and communicating these grease reservoirs with each other, the grease can be uniformly supplied into each pocket.

前記蓋部材を環状に一体に連なるものとすることにより、蓋部材を容易に装着することができる。   The lid member can be easily mounted by connecting the lid member integrally in an annular shape.

本発明の玉軸受用冠型保持器は、グリース溜め部をグリース通路の部分を除いて閉塞した空間内に設けたので、重力や遠心力等によるグリース溜め部からのグリースの流出を防止し、グリース通路からポケット内面にグリースを安定して供給できるとともに、軸受回転時のトルクロスが増大しないようにすることができる。   Since the crown retainer for ball bearings of the present invention is provided in the closed space except for the grease passage portion, the grease reservoir prevents the grease from flowing out of the grease reservoir due to gravity, centrifugal force, etc. Grease can be stably supplied from the grease passage to the inner surface of the pocket, and the torque cross during rotation of the bearing can be prevented from increasing.

前記閉塞した空間を、ポケットの外側に設けたグリース溜め部を囲うように装着した蓋部材で形成することにより、グリース溜め部を設けた閉塞した空間を容易に形成することができる。   By forming the closed space with a lid member attached so as to surround the grease reservoir provided outside the pocket, the closed space provided with the grease reservoir can be easily formed.

前記グリース溜め部を環状体のポケットの開口側と反対側に設けることにより、大容量のグリース溜め部を形成することができる。   By providing the grease reservoir on the side opposite to the opening side of the annular pocket, a large-capacity grease reservoir can be formed.

前記グリース溜め部を円周方向の複数箇所に設け、これらのグリース溜め部を互いに連通することにより、各ポケット内に満遍なくグリースを供給することができる。   By providing the grease reservoirs at a plurality of locations in the circumferential direction and communicating these grease reservoirs with each other, the grease can be uniformly supplied into each pocket.

前記蓋部材を環状に一体に連なるものとすることにより、蓋部材を容易に装着することができる。   The lid member can be easily mounted by connecting the lid member integrally in an annular shape.

以下、図面に基づき、本発明の実施形態を説明する。図１は、本発明に係る玉軸受用冠型保持器１を用いた玉軸受を示す。この玉軸受は、内輪１１と外輪１２の軌道溝１１ａ、１２ａ間に、複数のボール１３が冠型保持器１で保持された深溝玉軸受であり、軸受内部が外輪１２の両端部に装着されたシール部材１４でシールされている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a ball bearing using a crown type cage 1 for ball bearings according to the present invention. This ball bearing is a deep groove ball bearing in which a plurality of balls 13 are held by the crown type cage 1 between the raceway grooves 11 a and 12 a of the inner ring 11 and the outer ring 12, and the inside of the bearing is mounted on both ends of the outer ring 12. The sealing member 14 is sealed.

前記冠型保持器１は樹脂で形成され、図２に示すように、環状体２の円周方向複数箇所に、軸方向の一方向に開口３ａを有し、ボール１３を収納するポケット３を設けたものであり、ポケット３の内面はボール１３の表面に沿う球面とされている。   The crown-shaped cage 1 is made of resin, and as shown in FIG. 2, the pocket 3 having openings 3a in one axial direction at a plurality of locations in the circumferential direction of the annular body 2 and accommodating the balls 13 is provided. The inner surface of the pocket 3 is a spherical surface along the surface of the ball 13.

図３（ａ）、（ｂ）に示すように、前記環状体２のポケット３の開口３ａと反対側には、環状体２の半径方向の厚み中央部で、ポケット３を形成する円弧部２ａと、隣り合う円弧部２ａを連結する連結部２ｂに沿わせるように抉り込まれたグリース溜め部４が設けられ、これらのグリース溜め部４が環状に一体に連なる樹脂製の蓋部材５で囲われている。また、各グリース溜め部４は、各ポケット３の内面と２本ずつのグリース通路６で連通されるとともに、円弧部２ａの外側に設けられた連通路７で互いに連通されている。なお、環状の蓋部材５は、半径方向の両側に設けられた環状凸部５ａを、環状体２の半径方向の両側に設けられた環状凹段差部２ｃに嵌め込んで装着されている。蓋部材５は、複数のピンとピン穴の係合で環状体２に装着することもできる。   As shown in FIGS. 3A and 3B, on the side opposite to the opening 3a of the pocket 3 of the annular body 2, an arc portion 2a forming the pocket 3 is formed at the central portion of the annular body 2 in the radial direction. And a grease reservoir 4 that is swung in along the connecting portion 2b that connects the adjacent arc portions 2a, and the grease reservoir 4 is surrounded by a resin lid member 5 that is integrally connected in an annular shape. It has been broken. Each grease reservoir 4 is communicated with the inner surface of each pocket 3 by two grease passages 6 and is also communicated with each other by a communication passage 7 provided outside the arc portion 2a. The annular lid member 5 is mounted by fitting the annular convex portions 5 a provided on both sides in the radial direction into the annular concave step portions 2 c provided on both sides in the radial direction of the annular body 2. The lid member 5 can also be attached to the annular body 2 by engaging a plurality of pins and pin holes.

上述した実施形態では、グリース溜め部を、ポケットの開口と反対側で、環状体の半径方向の厚み中央部に設けたが、グリース溜め部は、ポケットへのボールの収納を阻害しないように蓋部材を取り付けられる部位であれば、任意の部位に設けることができる。   In the embodiment described above, the grease reservoir is provided at the center of the annular thickness in the radial direction on the side opposite to the opening of the pocket. However, the grease reservoir is a lid so as not to hinder the storage of the ball in the pocket. If it is a site | part which can attach a member, it can provide in arbitrary sites.

本発明に係る玉軸受用冠型保持器を用いた深溝玉軸受を示す縦断面図The longitudinal section which shows the deep groove ball bearing using the crown type cage for ball bearings concerning the present invention 図１の冠型保持器を示す縦断面図1 is a longitudinal sectional view showing the crown type cage of FIG. ａは図２の冠型保持器の展開横断面図、ｂはａのIIIb−IIIb線に沿った断面図a is a developed cross-sectional view of the crown type cage of FIG. 2, and b is a cross-sectional view taken along line IIIb-IIIb of a.

符号の説明Explanation of symbols

１ 冠型保持器
２ 環状体
２ａ 円弧部
２ｂ 連結部
２ｃ 環状凹段差部
３ ポケット
３ａ 開口
４ グリース溜め部
５ 蓋部材
５ａ 環状凸部
６ グリース通路
７ 連通路
１１ 内輪
１２ 外輪
１１ａ、１２ａ 軌道溝
１３ ボール
１４ シール部材 DESCRIPTION OF SYMBOLS 1 Crown type holder 2 Annular body 2a Arc part 2b Connecting part 2c Annular concave step part 3 Pocket 3a Opening 4 Grease reservoir part 5 Lid member 5a Annular convex part 6 Grease path 7 Communication path 11 Inner ring 12 Outer ring 11a, 12a Track groove 13 Ball 14 Seal member

Claims (5)

環状体の円周方向複数箇所に、軸方向の一方向に開口し、玉軸受のボールを収納するポケットを設け、これらのポケットの外側に設けたグリース溜め部から各ポケットの内面に連通するグリース通路を設けた玉軸受用冠型保持器において、前記グリース溜め部が前記グリース通路の部分を除いて閉塞した空間内に設けられたことを特徴とする玉軸受用冠型保持器。   Grease that opens in one axial direction at multiple locations in the circumferential direction of the annular body, has pockets for storing balls of ball bearings, and communicates with the inner surface of each pocket from a grease reservoir provided outside these pockets A ball bearing crown type cage having a passage, wherein the grease reservoir portion is provided in a closed space except for the grease passage portion. 前記閉塞した空間が、前記ポケットの外側に設けたグリース溜め部を囲うように装着した蓋部材で形成された請求項１に記載の玉軸受用冠型保持器。   The crown type cage for ball bearings according to claim 1, wherein the closed space is formed by a lid member mounted so as to surround a grease reservoir provided outside the pocket. 前記グリース溜め部を前記環状体の前記ポケットの開口側と反対側に設けた請求項１または２に記載の玉軸受用冠型保持器。   The crown type cage for a ball bearing according to claim 1 or 2, wherein the grease reservoir is provided on the side opposite to the opening side of the pocket of the annular body. 前記グリース溜め部を円周方向の複数箇所に設け、これらのグリース溜め部を互いに連通させた請求項３に記載の玉軸受用冠型保持器。   The crown type cage for a ball bearing according to claim 3, wherein the grease reservoirs are provided at a plurality of locations in the circumferential direction, and the grease reservoirs are communicated with each other. 前記蓋部材を環状に一体に連なるものとした請求項２乃至４のいずれかに記載の玉軸受用冠型保持器。   The crown type cage for ball bearings according to any one of claims 2 to 4, wherein the lid member is integrally connected in an annular shape.
JP2007190452A 2007-07-23 2007-07-23 Crown type cage for ball bearing Pending JP2009024822A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010119835A1 (en) * 2009-04-16 2010-10-21 Ntn株式会社 Deep groove ball bearing and method of designing same
JP2011208663A (en) * 2010-03-29 2011-10-20 Ntn Corp Rolling bearing
JP2011226635A (en) * 2010-03-29 2011-11-10 Ntn Corp Rolling bearing and crown-shaped cage
CN117847089A (en) * 2024-03-06 2024-04-09 宁波银球科技股份有限公司 Bearing retainer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010119835A1 (en) * 2009-04-16 2010-10-21 Ntn株式会社 Deep groove ball bearing and method of designing same
JP2011208663A (en) * 2010-03-29 2011-10-20 Ntn Corp Rolling bearing
JP2011226635A (en) * 2010-03-29 2011-11-10 Ntn Corp Rolling bearing and crown-shaped cage
US20130022304A1 (en) * 2010-03-29 2013-01-24 Mitsuo Kawamura Rolling bearing and crown-shaped retainer
US8545105B2 (en) * 2010-03-29 2013-10-01 Ntn Corporation Rolling bearing and crown-shaped retainer
CN117847089A (en) * 2024-03-06 2024-04-09 宁波银球科技股份有限公司 Bearing retainer
CN117847089B (en) * 2024-03-06 2024-06-28 宁波银球科技股份有限公司 Bearing retainer

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