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JP2008057571A - Roller for rolling bearing and rolling bearing - Google Patents

Roller for rolling bearing and rolling bearing Download PDF

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Publication number
JP2008057571A
JP2008057571A JP2006232247A JP2006232247A JP2008057571A JP 2008057571 A JP2008057571 A JP 2008057571A JP 2006232247 A JP2006232247 A JP 2006232247A JP 2006232247 A JP2006232247 A JP 2006232247A JP 2008057571 A JP2008057571 A JP 2008057571A
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JP
Japan
Prior art keywords
roller
chamfered
crowning
curvature
radius
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
JP2006232247A
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Japanese (ja)
Inventor
Takeshi Maeda
剛 前田
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NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
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Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2006232247A priority Critical patent/JP2008057571A/en
Publication of JP2008057571A publication Critical patent/JP2008057571A/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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • F16C23/088—Ball or roller bearings self-adjusting by means of crowning
    • 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
    • F16C33/34—Rollers; Needles
    • F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • 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
    • F16C2240/50—Crowning, e.g. crowning height or crowning radius
    • 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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
    • F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for 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 smoothly connect between a crowning part and a chamfered round part and between an end surface of a roller and the chamfered round part with short connecting round parts. <P>SOLUTION: By connecting between the crowning part 3a of the barrel-shape roller 3 and the chamfered round part 5 and between the large end surface 3b and the chamfered round part 5 respectively with the connecting round parts 6a, 6b having curvature radius R<SB>6</SB>shorter than a curvature radius R<SB>5</SB>of the chamfered round part 5, it is possible to smoothly connect between the crowning part 3a and the chamfered round part 5 and between the large end surface 3b of the roller 3 and the chamfered round part 5 with the short connecting round parts 6a, 6b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、転がり軸受用ころと転がり軸受に関する。   The present invention relates to a roller for a rolling bearing and a rolling bearing.

円筒ころ軸受、円錐ころ軸受、自動調心ころ軸受等の転がり軸受に用いられる転がり軸受用ころには、転動面の全部または端部にクラウニング部を設け、ころの端面とクラウニング部との間にクラウニング部の曲率半径よりも小さい曲率半径の面取りＲ部を設けて、ころの端部と内外輪の軌道面との間のエッジ応力を緩和するようにしたものがある（例えば、特許文献１参照）。   Rolling bearing rollers used in rolling bearings such as cylindrical roller bearings, tapered roller bearings, and self-aligning roller bearings are provided with a crowning portion at all or at the end of the rolling surface, and between the roller end surface and the crowning portion. In this case, a chamfered R portion having a radius of curvature smaller than the radius of curvature of the crowning portion is provided to relieve the edge stress between the roller end portion and the raceway surface of the inner and outer rings (for example, Patent Document 1). reference).

さらに、クラウニング部と面取りＲ部との間、およびころの端面と面取りＲ部との間を繋ぎＲ部で滑らかに接続し、クラウニング部と面取りＲ部との境界部に残存するエッジによる内外輪の軌道面の疵付きや、ころの端面と面取りＲ部との境界部に残るエッジによる、ころの端面と軌道輪の鍔や鍔輪との接触部における油膜切断を防止するようにしたものもある（例えば、特許文献２参照）。   Further, the inner and outer rings are formed by the edges remaining at the boundary between the crowning portion and the chamfered R portion by connecting between the crowning portion and the chamfered R portion and between the end surface of the roller and the chamfered R portion and connecting them smoothly at the R portion. Also, it is possible to prevent oil film cutting at the contact portion between the roller end surface and the raceway ring collar or saddle ring due to wrinkling of the raceway surface or the edge remaining at the boundary between the roller end surface and the chamfered R portion. Yes (for example, see Patent Document 2).

また、転がり軸受用ころには、例えば、円錐ころ軸受に用いられる円錐ころや、自動調心ころ軸受に用いられるたる形ころのように、軌道輪の鍔や鍔輪で案内される端面を、クラウニング部の曲率半径よりも大きい曲率半径の緩やかな球面で形成したものもある。   In addition, for roller bearings, for example, tapered rollers used for tapered roller bearings and end faces guided by bearing rings and saddles, such as barrel rollers used for self-aligning roller bearings, Some of them are formed of a gentle spherical surface having a radius of curvature larger than the radius of curvature of the crowning portion.

実開２００４−６０８６０号公報Japanese Utility Model Publication No. 2004-60860 特開平８−７４８５８号公報JP-A-8-74858

特許文献２に記載されたように、クラウニング部と面取りＲ部との間、およびころの端面と面取りＲ部との間を繋ぎＲ部で滑らかに接続した転がり軸受用ころは、軌道面との間のエッジ応力を緩和できるのみでなく、上述した残存エッジによる軌道面の疵付きや、鍔や鍔輪との接触部における油膜切断も防止できるが、繋ぎＲ部の長さが長くなると、ころの転動面と軌道面との接触長さや、ころの端面と鍔や鍔輪との接触長さが短くなり、これらの接触部での接触面圧が高くなる問題がある。   As described in Patent Document 2, a roller for a rolling bearing that connects between the crowning portion and the chamfered R portion and between the end surface of the roller and the chamfered R portion and smoothly connects with the R portion, In addition to relieving the edge stress between them, it is possible to prevent wrinkling of the raceway surface due to the above-mentioned remaining edge and oil film cutting at the contact portion with the hook and hook ring, but when the length of the connecting R part becomes long, The contact length between the rolling surface and the raceway surface and the contact length between the end surface of the roller and the collar or collar are shortened, and the contact surface pressure at these contact portions is increased.

そこで、本発明の課題は、クラウニング部と面取りＲ部との間、およびころの端面と面取りＲ部との間を、短い繋ぎＲ部で滑らかに接続することである。   Therefore, an object of the present invention is to smoothly connect the crowning portion and the chamfered R portion and the end surface of the roller and the chamfered R portion with a short connecting R portion.

上記の課題を解決するために、本発明は、転動面の少なくとも端部にクラウニング部を設け、このクラウニング部と端面との間に、クラウニング部の曲率半径よりも小さい曲率半径の面取りＲ部を設けた転がり軸受用ころにおいて、前記クラウニング部と面取りＲ部との間、および前記端面と面取りＲ部との間を、面取りＲ部の曲率半径よりも小さい曲率半径の繋ぎＲ部で接続した構成を採用した。   In order to solve the above problems, the present invention provides a crowning portion at least at an end of a rolling surface, and a chamfered R portion having a radius of curvature smaller than the radius of curvature of the crowning portion between the crowning portion and the end surface. In the roller for a roller bearing provided with the above, the crowning portion and the chamfered R portion, and the end surface and the chamfered R portion are connected by a joint R portion having a curvature radius smaller than the curvature radius of the chamfered R portion. Adopted the configuration.

すなわち、クラウニング部と面取りＲ部との間、および前記端面と面取りＲ部との間を、面取りＲ部の曲率半径よりも小さい曲率半径の繋ぎＲ部で接続することにより、クラウニング部と面取りＲ部との間、およびころの端面と面取りＲ部との間を、短い繋ぎＲ部で滑らかに接続できるようにした。   That is, by connecting the crowning portion and the chamfered R portion and between the end surface and the chamfered R portion with a joint R portion having a smaller radius of curvature than the radius of curvature of the chamfered R portion, the crowning portion and the chamfered R portion are connected. It is possible to smoothly connect between the end portion and between the roller end face and the chamfered R portion with a short connecting R portion.

前記クラウニング部との間に面取りＲ部が設けられた端面は、前記クラウニング部の曲率半径よりも大きい曲率半径の球面で形成されたものとすることもできる。   The end surface provided with the chamfered R portion between the crowning portion and the crowning portion may be formed of a spherical surface having a radius of curvature larger than the radius of curvature of the crowning portion.

また、本発明は、内輪と外輪の軌道面間に複数のころを配列した転がり軸受において、前記ころに上述したいずれかの転がり軸受用ころを用いた構成を採用した。   Further, the present invention employs a configuration in which any of the above-described roller bearing rollers is used as the roller in a rolling bearing in which a plurality of rollers are arranged between the raceways of the inner ring and the outer ring.

本発明の転がり軸受用ころは、クラウニング部と面取りＲ部との間、および端面と面取りＲ部との間を、面取りＲ部の曲率半径よりも小さい曲率半径の繋ぎＲ部で接続することにより、クラウニング部と面取りＲ部との間、およびころの端面と面取りＲ部との間を、短い繋ぎＲ部で滑らかに接続して、ころの転動面と軌道面との接触長さや、ころの端面と鍔や鍔輪との接触長さを十分に確保できるようにしたので、これらの接触部での接触面圧の上昇を抑制することができる。   The roller for a rolling bearing according to the present invention connects the crowning portion and the chamfered R portion, and the end surface and the chamfered R portion by connecting the R portion with a radius of curvature smaller than the radius of curvature of the chamfered R portion. The length of contact between the rolling surface of the roller and the raceway surface is smoothly connected between the crowning portion and the chamfered R portion, and between the roller end surface and the chamfered R portion with a short connecting R portion. Since a sufficient contact length between the end face of the metal plate and the eaves and the eaves can be secured, an increase in the contact surface pressure at these contact portions can be suppressed.

以下、図面に基づき、本発明の実施形態を説明する。図１は、本発明に係る転がり軸受用ころを用いた自動調心ころ軸受を示す。この自動調心ころ軸受は、２列の軌道面１ａが設けられた内輪１と、内輪１の各軌道面１ａに対向する軌道面２ａが設けられた外輪２と、内輪１と外輪２の軌道面１ａ、２ａ間に２列に配列されたころ３と、これらのころ３を保持する保持器４とを備え、各ころ３の内側の大端面３ｂが、内輪１の軌道面１ａの間に設けられた鍔１ｂで案内されるようになっている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a self-aligning roller bearing using a roller bearing roller according to the present invention. This self-aligning roller bearing includes an inner ring 1 provided with two rows of raceway surfaces 1a, an outer ring 2 provided with raceway surfaces 2a facing each raceway surface 1a of the inner ring 1, and a raceway between the inner ring 1 and the outer ring 2. Rollers 3 arranged in two rows between the surfaces 1a and 2a and a cage 4 for holding these rollers 3 are provided, and the large end surface 3b inside each roller 3 is located between the raceway surfaces 1a of the inner ring 1. Guidance is provided by the provided basket 1b.

図２（ａ）に示すように、前記ころ３は、転動面の全長にクラウニング部３ａが設けられたたる形とされ、前記内輪１の鍔１ｂで案内される大端面３ｂは、クラウニング部３ａの曲率半径Ｒａよりも大きい曲率半径Ｒｂの球面で形成されている。反対側の小端面３ｃは曲率のない平面で形成されている。   As shown in FIG. 2 (a), the roller 3 has a barrel shape in which a crowning portion 3a is provided over the entire length of the rolling surface, and the large end surface 3b guided by the flange 1b of the inner ring 1 has a crowning portion. It is formed of a spherical surface having a curvature radius Rb larger than the curvature radius Ra of 3a. The opposite small end surface 3c is formed of a flat surface having no curvature.

図２（ｂ）に示すように、前記ころ３のクラウニング部３ａと大端面３ｂとの間には面取りＲ部５が設けられ、さらに、クラウニング部３ａと面取りＲ部５との間、および大端面３ｂと面取りＲ部５との間が、それぞれ面取りＲ部５の曲率半径Ｒ５よりも小さい曲率半径Ｒ６の短い繋ぎＲ部６ａ、６ｂで滑らかに接続されている。したがって、ころ３の転動面と各軌道面１ａ、２ａとの接触長さや、ころ３の大端面３ｂと内輪１の鍔１ｂとの接触長さが十分に確保されている。なお、この実施形態では、各繋ぎＲ部６ａ、６ｂの曲率半径Ｒ６は、面取りＲ部５の曲率半径Ｒ５の１／４とされている。各繋ぎＲ部６ａ、６ｂは、互いに異なる曲率半径としてもよい。 As shown in FIG. 2 (b), a chamfered R portion 5 is provided between the crowning portion 3a and the large end surface 3b of the roller 3, and further between the crowning portion 3a and the chamfered R portion 5, and a large size. between the end face 3b and the chamfered portion R 5 are smoothly connected short connecting R portion 6a of small radius of curvature R 6 than the radius of curvature R 5 of the chamfer R 5, in 6b. Therefore, the contact length between the rolling surface of the roller 3 and the raceway surfaces 1a and 2a and the contact length between the large end surface 3b of the roller 3 and the flange 1b of the inner ring 1 are sufficiently secured. In this embodiment, the curvature radius R 6 of each joint R portion 6 a, 6 b is ¼ of the curvature radius R 5 of the chamfer R portion 5. The connecting R portions 6a and 6b may have different radii of curvature.

上述した実施形態では、自動調心ころ軸受用のたる形ころとしたが、本発明に係る転がり軸受用ころは、転動面の少なくとも端部にクラウニング部が設けられ、このクラウニング部と端面との間に、クラウニング部の曲率半径よりも小さい曲率半径の面取りＲ部が設けられたものであればよく、円筒ころや円錐ころにも適用することができる。   In the embodiment described above, the roller roller for the self-aligning roller bearing is used. However, the roller bearing roller according to the present invention is provided with a crowning portion at least at the end of the rolling surface. Any chamfered R portion having a radius of curvature smaller than the radius of curvature of the crowning portion may be provided, and can also be applied to cylindrical rollers and tapered rollers.

本発明に係る転がり軸受用ころを用いた自動調心ころ軸受を示す縦断面図The longitudinal cross-sectional view which shows the self-aligning roller bearing using the roller for rolling bearings concerning this invention ａは図１のころを示す正面図、ｂはａの要部拡大正面図a is a front view showing the roller of FIG. 1, b is an enlarged front view of the main part of a

符号の説明Explanation of symbols

１ 内輪
２ 外輪
１ａ、２ａ 軌道面
３ ころ
３ａ クラウニング部
３ｂ 大端面
３ｃ 小端面
４ 保持器
５ 面取りＲ部
６ａ、６ｂ 繋ぎＲ部 DESCRIPTION OF SYMBOLS 1 Inner ring 2 Outer ring 1a, 2a Raceway surface 3 Roller 3a Crowning part 3b Large end surface 3c Small end surface 4 Cage 5 Chamfer R part 6a, 6b Joint R part

Claims (3)

転動面の少なくとも端部にクラウニング部を設け、このクラウニング部と端面との間に、クラウニング部の曲率半径よりも小さい曲率半径の面取りＲ部を設けた転がり軸受用ころにおいて、前記クラウニング部と面取りＲ部との間、および前記端面と面取りＲ部との間を、面取りＲ部の曲率半径よりも小さい曲率半径の繋ぎＲ部で接続したことを特徴とする転がり軸受用ころ。   A rolling bearing roller in which a crowning portion is provided at least at an end portion of the rolling surface, and a chamfered R portion having a curvature radius smaller than the curvature radius of the crowning portion is provided between the crowning portion and the end surface. A roller for a rolling bearing, characterized in that the chamfered R portion and the end surface and the chamfered R portion are connected by a connecting R portion having a smaller radius of curvature than the radius of curvature of the chamfered R portion. 前記クラウニング部との間に面取りＲ部が設けられた端面が、前記クラウニング部の曲率半径よりも大きい曲率半径の球面で形成された請求項１に記載の転がり軸受用ころ。   The roller for a rolling bearing according to claim 1, wherein an end face provided with a chamfered R portion between the crowning portion and the crowning portion is formed as a spherical surface having a radius of curvature larger than the radius of curvature of the crowning portion. 内輪と外輪の軌道面間に複数のころを配列した転がり軸受において、前記ころに請求項１または２に記載の転がり軸受用ころを用いたことを特徴とする転がり軸受。   A rolling bearing comprising a plurality of rollers arranged between raceways of an inner ring and an outer ring, wherein the roller bearing roller according to claim 1 is used as the roller.
JP2006232247A 2006-08-29 2006-08-29 Roller for rolling bearing and rolling bearing Pending JP2008057571A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020079646A (en) * 2014-10-08 2020-05-28 日本精工株式会社 Spherical roller bearing
WO2024161875A1 (en) * 2023-01-30 2024-08-08 Ntn株式会社 Rolling bearing

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0874858A (en) * 1994-08-31 1996-03-19 Ntn Corp Roller for roller bearing and its working method
JP2001003941A (en) * 1999-06-18 2001-01-09 Nsk Ltd Rolling bearing
JP2002250338A (en) * 2000-12-22 2002-09-06 Nsk Ltd Thrust bearing device
JP2004060860A (en) * 2002-07-31 2004-02-26 Ntn Corp Roller bearing, roller for roller bearing and manufacturing method
JP2005003121A (en) * 2003-06-12 2005-01-06 Nsk Ltd Cylindrical roller bearing
JP2005061495A (en) * 2003-08-11 2005-03-10 Nsk Ltd Cylindrical roller bearing
JP2005083467A (en) * 2003-09-08 2005-03-31 Nsk Ltd Cylindrical roller bearing
JP2005163873A (en) * 2003-12-01 2005-06-23 Nachi Fujikoshi Corp Rolling bearing

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0874858A (en) * 1994-08-31 1996-03-19 Ntn Corp Roller for roller bearing and its working method
JP2001003941A (en) * 1999-06-18 2001-01-09 Nsk Ltd Rolling bearing
JP2002250338A (en) * 2000-12-22 2002-09-06 Nsk Ltd Thrust bearing device
JP2004060860A (en) * 2002-07-31 2004-02-26 Ntn Corp Roller bearing, roller for roller bearing and manufacturing method
JP2005003121A (en) * 2003-06-12 2005-01-06 Nsk Ltd Cylindrical roller bearing
JP2005061495A (en) * 2003-08-11 2005-03-10 Nsk Ltd Cylindrical roller bearing
JP2005083467A (en) * 2003-09-08 2005-03-31 Nsk Ltd Cylindrical roller bearing
JP2005163873A (en) * 2003-12-01 2005-06-23 Nachi Fujikoshi Corp Rolling bearing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020079646A (en) * 2014-10-08 2020-05-28 日本精工株式会社 Spherical roller bearing
WO2024161875A1 (en) * 2023-01-30 2024-08-08 Ntn株式会社 Rolling bearing

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