JP2004116659A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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Publication number
JP2004116659A
JP2004116659A JP2002281388A JP2002281388A JP2004116659A JP 2004116659 A JP2004116659 A JP 2004116659A JP 2002281388 A JP2002281388 A JP 2002281388A JP 2002281388 A JP2002281388 A JP 2002281388A JP 2004116659 A JP2004116659 A JP 2004116659A
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Japan
Prior art keywords
outer ring
wedge member
groove
rolling bearing
housing
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JP2002281388A
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Japanese (ja)
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JP4193034B2 (en
Inventor
Yozo Taniguchi
谷口　陽三
Mitsuhito Goto
後藤　潤仁
Mikio Kuromatsu
黒松　幹雄
Shigenori Bando
坂東　重徳
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Priority to JP2002281388A priority Critical patent/JP4193034B2/en
Publication of JP2004116659A publication Critical patent/JP2004116659A/en
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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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/10—Force connections, e.g. clamping
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/10—Force connections, e.g. clamping
    • F16C2226/16—Force connections, e.g. clamping by wedge action, e.g. by tapered or conical parts
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing for creep prevention capable of preventing creep from occurring even if a large rotating force acts thereon, increasing a life, and improving durability. <P>SOLUTION: A slit groove 2b in the tangential direction is formed in the outer periphery of the outer ring of the rolling bearing having the outer ring 2 fitted to a housing 1, an inner ring 3, and rolling elements 5 disposed in an annular space between the outer ring 2 and the inner ring 3. A wedge member 9 such as a ball and a cylindrical roller having a diameter slightly smaller than the height of the groove at the deepest position is disposed in the groove 2b. In this case, the wedge member 9 may be disposed in the groove 2b through a box-shaped member 8 with an elongated hole in the upper surface thereof. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば温度変化があったり或いは振動等の生じやすい位置に嵌め入れる軸受であって、内輪の回転に伴ってハウジング等の固定部と外輪との間に生じるクリープを防止することのできる転がり軸受に関する。
【０００２】
【従来の技術】
転がり軸受の外輪を、すきま嵌め或いは比較的軽い力でハウジングに外輪を圧入して使用する場合、外輪に何らかの理由で回転力が加わった時、所謂クリープが発生することがある。例えば、振動や衝撃等により外輪に回転力が作用するとクリープが発生することがある。その他、温度上昇によりハウジングの熱膨張率が軸受外輪のそれより大きいと、クリープが発生しやすくなる。
【０００３】
ハウジングと軸受外輪との間のクリープ防止については、従来から種々の提案がなされてきた。例えば、ハウジングに嵌合させる外輪外周に偏心させた環状溝を周設し、一部に膨出部を形成すると共に端部を重合させるような有端弾性リングであって該重合部を前記偏心環状溝の最浅溝部の深さより厚くしたものを前記環状溝に嵌合させるようにしたもの、特許文献１の図９に示すように、ハウジング等に嵌合される外輪２２の外周面２２ａに、凹溝２４を周設すると共に、該凹溝２４に、その半径が前記外輪２２の半径外径よりＡだけ少し大きくなるよう１本或いは２本のＯリング２３を装着することにより、その緊迫力でクリープ発生限界点を向上させる提案もなされている（例えば特許文献１参照）。
【０００４】
【特許文献１】
特開２００２−１３０３０９
【０００５】
【発明が解決しようとする課題】
上記するような従来のクリープ防止用の転がり軸受では、加工が比較的複雑であったり、弾性リング等は寿命に問題があったり、また、クリープ発生限界点があまり大きくないために、その限界点以上においてはクリープが発生し、ハウジングが摩耗してしまう、という問題があった。
【０００６】
この発明は、上記する課題に対処するためになされたものであり、加工も比較的簡単であり、大きな回転力が作用してもクリープが発生せず、寿命も長く、且つ耐久性にも優れたクリープ防止用の転がり軸受を提供することを目的としている。
【０００７】
【課題を解決するための手段】
即ち、この発明は上記する課題を解決するために、請求項１に記載の発明は、ハウジング又は固定部に嵌合する外輪と、内輪と、これら外輪と内輪との間に配置される転動体とを備えた転がり軸受において、
前記外輪外周に接線方向のスリット溝を設けると共に、該溝に、該溝の最も深い位置の高さと同等若しくはこれより少し小さい外径を有する楔部材を移動自在に配置して成ることを特徴とするものである。
【０００８】
請求項２に記載の発明は、前記スリット溝に嵌合し、内部で楔部材を移動自在に保持すると共に、外輪外周面側に該楔部材の一部を露出する長穴を設けた箱状のカートリッジを配置して成ることを特徴とするものである。
【０００９】
また、請求項３に記載の発明は、前記楔部材が、玉であることを特徴とするものである。
【００１０】
この発明の上記各手段によれば、ハウジング１と、すきま嵌め或いは軽い圧入嵌合されている外輪２との間にクリープが生じようとしても、外輪２の外周面に設けたスリット溝２ｂに入れた楔部材９が、溝内を移動し、ハウジング１の内周面１ａと溝２ｂとの間の狭い空間において楔効果によって食い込み、ハウジング１と外輪２との相対回転を、一方向クラッチのように阻止する。従って、クリープはほぼ完全に防止することができる（図１乃至図３参照）。
【００１１】
【発明の実施の形態】
以下、この発明の具体的な実施の形態について図面を参照して説明する。
図１（Ａ）は、この発明の転がり軸受の軸方向の一部断面図であり、ハウジングに嵌めた状態を示す。図１（Ｂ）は、図１（Ａ）のＡーＡ矢視図である。また、図２（Ａ）は、図１のＢ−Ｂ矢視断面図であり、図２（Ｂ）は、図２（Ａ）のＰ矢視平面図である。この転がり軸受は、ハウジング１にすきま嵌め或いは軽い荷重で圧入される外輪２と、内輪３と、これら外輪２と内輪３との間の環状空間４に配置される転動体５と、該転動体５を保持する保持器６と、で構成される。この転がり軸受は、外輪２の内周両端部に溝２ａ，２ａが形成され、シールド板７，７が転動体５を配置する環状空間４を密封している。
【００１２】
前記外輪２の外周の一部には、接線方向のスリット溝２ｂが設けられ、弓状の空間を形成している。該スリット溝２ｂには、図３に示すように、該スリット溝２ｂの最も深い位置の高さＨより少し小さい外径ｄの玉の楔部材９を保持するカートリッジ８が嵌め込まれている。この楔部材９は、ハウジング１と外輪２との間に相対回転（クリープ）が発生したとき、スリット溝２ｂ内を転がり、該スリット溝２ｂとハウジング１の内周面１ａとの間で楔作用をする部材となるものである。
【００１３】
次に、前記楔部材９を保持するカートリッジ８は、薄い金属板或いは合成樹脂により製作され、側面形状は、前記外輪２に形成した弓状のスリット溝２ｂの側面形状をはみ出さない形状としてある。例えば、該側面形状は、前記弓状のスリット溝２ｂの側面形状に沿って類似の形状に形成され且つ該カートリッジ８の外輪外周面側には長穴８ａが設けられている。そして、前記玉の楔部材９は、この長穴８ａの範囲で移動自在に保持される。該カートリッジ８は、楔部材９を安定的に保持して、ハウジング１と外輪２とを嵌合する際組み立て作業をし易くするためのもので、外輪２の弓状のスリット溝２ｂに若干弾性変形させて嵌め入れてある。また、上記するように楔部材９は長穴８ａの範囲内で移動するが、両端部で該長穴８ａよりその一部が突出して、外輪２とハウジング８との間で係合（楔作用）する。
【００１４】
図４は、金属板を使用してプレス加工によりカートリッジ８を製作する工程を示す簡単な図である。図４（Ａ）に示すように、先ず、長手方向に長い２辺８ｂ，８ｂを有する八角形であって、中央部に長穴８ａを金型で板材を打ち抜く。次に、図４（Ａ）の折線８ｃ，８ｃにそって、図４（Ｂ）、図４（Ｃ）に示すように折り曲げ、全体をわん曲させて、図５の斜視図に示すような曲線状の箱型とする。尚、該カートリッジ８は、必須のものではなく、外輪２に設けた半円状の溝２ｂに楔部材９を入れた状態でハウジング１と外輪２とを嵌合しても良い。
【００１５】
図６は、ハウジング１の内周面と、玉の楔部材９とのくい込み角を示す図である。　前記外輪２に設けた弓状のスリット溝２ｂに配置する楔部材９の外径ｄは、スリット溝２ｂの最も深い位置の高さＨと同一又はこれより若干小さい外径とする（図３参照）。前記楔部材９の径ｄを、スリット溝２ｂの最も深い位置の高さＨと同一とすると、即ち、ハウジング１の内周面と、楔部材である玉９とのくい込み角を０°とすると、溝２ｂに配置したカートリッジ８を配置した外輪２を、ハウジング１に嵌め入れるとき楔部材９が少しでも動くと、該楔部材９が外輪２の外周面から突出するので、ハウジングに嵌めにくくなる。従って、該楔部材９の径ｄは、スリット溝２ｂの最も深い位置の高さＨより少し小さくして多少動いても外輪２をハウジング１に嵌め入れやすくするのが作業能率上好ましい。
【００１６】
一方、楔部材９の径ｄが、スリット溝２ｂの最も深い位置の高さＨよりも、かなり小さいと、ハウジング１の内周面１ａと楔部材９とのくい込み角αが、大きくなり、すべりが生じてクリープを防止出来なくなる。従って、作業能率及びクリープ防止の観点からαは、５°〜１５°程度が最も良い。
【００１７】
【実験例】
図７は、この発明の転がり軸受を用いて行ったクリープ試験の一例を示す図である。この試験に用いた装置は、図８に示すように、ハウジング１に転がり軸受の外輪２を嵌合させ、内輪３には回転軸１１を嵌合固定し、他方の軸受１０との間に該回転軸１１を架設し、また、該回転軸１１には偏心荷重がかかるよう重錘１３を取り付けた円板部材１２を固定して構成してある。
この装置において、くい込み角αは、１０°、外輪２の外径は、５２ｍｍ、楔部材９の外径は１ｍｍ、内輪３を嵌合する回転軸径は、２０ｍｍ、この回転軸にかけた回転速度（ｒ／ｍｉｎ）を、表の横軸に示し、内輪回転軸にかけた偏心回転荷重）　は、この図７の下側の横軸に示す如くである。偏心回転荷重は、回転軸１１に円板部材を取り付け、回転軸中心から６０ｍｍの位置に５０ｇの重錘を置くことによりかかるようにした。この実験結果からわかるように、この発明の転がり軸受によれば、全くクリープは生じなかった。
【００１８】
前記楔部材９は、玉に限らず、ハウジング１と外輪２との間で相対回転が生じたとき、スリット溝２ｂ上を転がり、該スリット溝２ｂとハウジング１との間の狭くなっている空間部分へ移動し、楔作用するものであれば円筒コロ等その形状は問わない。また、楔部材９の数は単数でもよく、複数個でもよい。
【００１９】
【発明の効果】
以上、詳述したように、本発明の転がり軸受によれば、大きな回転トルクがいくらかかってもクリープは全く生じない。従って、極めて有効にクリープを防止することができる。また、この転がり軸受は、外輪に接線方向のスリット溝を加工するだけであり、楔部材を収容するカートリッジも簡単に加工可能であり、且つ楔部材も従来のボールやコロ等を用いることができるのでコスト的にも安価に製作することができ且つ耐久性にも優れる。
【図面の簡単な説明】
【図１】図１（Ａ）は、この発明の転がり軸受の軸方向の一部断面図であり、ハウジ　グに嵌めた状態を示す。図１（Ｂ）は、図１（Ａ）のＡーＡ矢視図である。
【図２】図２（Ａ）は、図１のＢ−Ｂ矢視断面図であり、図２（Ｂ）は、図２（Ａ）　Ｐ矢視平面図である。
【図３】外輪の軸方向に対して直角方向の一部断面図であって、該外輪に形成される溝の深さと楔部材である玉の径との関係を示す図である。
【図４】金属板を使用してプレス加工により本発明で用いるカートリッジを製作する工程を簡単に示す図である。
【図５】本発明で使用される箱状部材に楔部材をいれた状態の斜視図である。
【図６】本発明で使用される楔部材を外輪の半円状溝に入れ、ハウジングの内周面とこの楔部材とのくい込み角を示す図である。
【図７】本発明の転がり軸受を用いて行ったクリープ試験の実験結果を示す図である。
【図８】本発明の転がり軸受を用いて行ったクリープ試験装置の構成を示す図である。
【図９】従来のクリープ防止手段を設けた転がり軸受の軸方向の一部断面図である。
【符号の説明】
１　　ハウジング
１ａ　ハウジング内周面
２　　外輪
２ｂ　半円状の溝
８　　箱状のカートリッジ
８ａ　箱状のカートリッジの長穴
９　　楔部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bearing that is fitted into a position where there is a temperature change or where vibration or the like is likely to occur, and can prevent creep between a fixed portion such as a housing and an outer ring due to rotation of the inner ring. It relates to a rolling bearing.
[0002]
[Prior art]
When the outer ring of the rolling bearing is used by press-fitting the outer ring into the housing with a clearance fit or a relatively light force, when rotational force is applied to the outer ring for some reason, so-called creep may occur. For example, when a rotational force acts on the outer ring due to vibration, impact, or the like, creep may occur. In addition, if the coefficient of thermal expansion of the housing is higher than that of the bearing outer ring due to a rise in temperature, creep tends to occur.
[0003]
Various proposals have been made to prevent creep between the housing and the bearing outer ring. For example, an endless elastic ring in which an eccentric annular groove is provided around the outer periphery of the outer ring to be fitted into the housing, a bulge is formed in one part, and the end is overlapped, An annular groove having a thickness greater than the depth of the shallowest groove portion is fitted into the annular groove. As shown in FIG. 9 of Patent Document 1, the outer peripheral surface 22a of the outer ring 22 fitted to a housing or the like is provided on the outer peripheral surface 22a. And one or two O-rings 23 are attached to the groove 24 so that the radius of the groove 24 is slightly larger than the outer diameter of the outer ring 22 by A. There is also a proposal to improve the creep occurrence limit point by force (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-2002-130309
[0005]
[Problems to be solved by the invention]
In the conventional rolling bearing for preventing creep as described above, the processing is relatively complicated, the elastic ring or the like has a problem in the life, and the creep occurrence limit point is not so large, so the limit point In the above, there was a problem that creep occurred and the housing was worn.
[0006]
The present invention has been made to address the above-described problems, and is relatively easy to process, does not creep even when a large rotational force is applied, has a long life, and has excellent durability. It is intended to provide a rolling bearing for preventing creep.
[0007]
[Means for Solving the Problems]
That is, in order to solve the above-mentioned problem, the present invention is directed to an outer ring fitted to a housing or a fixed portion, an inner ring, and a rolling element disposed between the outer ring and the inner ring. In a rolling bearing provided with
A tangential slit groove is provided on the outer periphery of the outer ring, and a wedge member having an outer diameter equal to or slightly smaller than the height of the deepest position of the groove is movably arranged in the groove. Is what you do.
[0008]
The invention according to claim 2 is a box-shaped fitting which fits into the slit groove, movably holds the wedge member inside, and has a long hole which exposes a part of the wedge member on the outer peripheral surface side. Are arranged.
[0009]
The invention according to claim 3 is characterized in that the wedge member is a ball.
[0010]
According to the above-described means of the present invention, even if creep is to occur between the housing 1 and the outer ring 2 which is fitted with a clearance fit or a light press fit, the creep is inserted into the slit groove 2b provided on the outer peripheral surface of the outer ring 2. The wedge member 9 moves in the groove, bites by a wedge effect in a narrow space between the inner peripheral surface 1a of the housing 1 and the groove 2b, and controls the relative rotation between the housing 1 and the outer ring 2 like a one-way clutch. To block. Therefore, creep can be almost completely prevented (see FIGS. 1 to 3).
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a partial cross-sectional view in the axial direction of a rolling bearing according to the present invention, showing a state where the rolling bearing is fitted to a housing. FIG. 1B is a view taken in the direction of arrows AA in FIG. 2A is a cross-sectional view taken along the line BB of FIG. 1, and FIG. 2B is a plan view taken along the arrow P of FIG. 2A. The rolling bearing includes an outer ring 2 which is loosely fitted into the housing 1 or press-fitted with a light load, an inner ring 3, a rolling element 5 disposed in an annular space 4 between the outer ring 2 and the inner ring 3, and a rolling element 5. And a retainer 6 for retaining the same. In this rolling bearing, grooves 2a, 2a are formed at both ends of the inner periphery of the outer ring 2, and the shield plates 7, 7 seal the annular space 4 in which the rolling elements 5 are arranged.
[0012]
A tangential slit groove 2b is provided in a part of the outer periphery of the outer ring 2 to form an arcuate space. As shown in FIG. 3, a cartridge 8 for holding a wedge member 9 of a ball having an outer diameter d slightly smaller than the height H at the deepest position of the slit groove 2b is fitted into the slit groove 2b. When relative rotation (creep) occurs between the housing 1 and the outer ring 2, the wedge member 9 rolls in the slit groove 2 b and acts as a wedge between the slit groove 2 b and the inner peripheral surface 1 a of the housing 1. It is a member to perform.
[0013]
Next, the cartridge 8 holding the wedge member 9 is made of a thin metal plate or a synthetic resin, and has a side surface shape that does not protrude from the side surface shape of the arcuate slit groove 2b formed in the outer ring 2. . For example, the side surface shape is formed in a similar shape along the side surface shape of the arcuate slit groove 2b, and a long hole 8a is provided on the outer peripheral surface side of the outer ring of the cartridge 8. The wedge member 9 of the ball is movably held in the range of the elongated hole 8a. The cartridge 8 stably holds the wedge member 9 and facilitates an assembling operation when the housing 1 and the outer ring 2 are fitted to each other. It is deformed and fitted. Further, as described above, the wedge member 9 moves within the range of the elongated hole 8a, but a part thereof protrudes from the elongated hole 8a at both ends to engage between the outer ring 2 and the housing 8 (wedge action). ).
[0014]
FIG. 4 is a simple diagram showing a process of manufacturing the cartridge 8 by pressing using a metal plate. As shown in FIG. 4 (A), first, a plate material is punched out of an octagon having two sides 8b, 8b long in the longitudinal direction, and a long hole 8a in the center at the center. Next, it is bent along the folding lines 8c, 8c in FIG. 4 (A) as shown in FIGS. 4 (B) and 4 (C), and the whole is bent, as shown in the perspective view of FIG. It is a curved box shape. Note that the cartridge 8 is not essential, and the housing 1 and the outer ring 2 may be fitted with the wedge member 9 inserted in the semicircular groove 2 b provided in the outer ring 2.
[0015]
FIG. 6 is a diagram showing a penetration angle between the inner peripheral surface of the housing 1 and the wedge member 9 of the ball. The outer diameter d of the wedge member 9 arranged in the arcuate slit groove 2b provided in the outer ring 2 is equal to or slightly smaller than the height H at the deepest position of the slit groove 2b (see FIG. 3). ). Assuming that the diameter d of the wedge member 9 is the same as the height H at the deepest position of the slit groove 2b, that is, the biting angle between the inner peripheral surface of the housing 1 and the ball 9 as the wedge member is 0 °. When the wedge member 9 slightly moves when the outer ring 2 having the cartridge 8 disposed in the groove 2b is fitted into the housing 1, the wedge member 9 protrudes from the outer peripheral surface of the outer ring 2, so that it is difficult to fit the wedge member 9 into the housing. . Therefore, it is preferable from the viewpoint of work efficiency that the diameter d of the wedge member 9 is slightly smaller than the height H at the deepest position of the slit groove 2b so that the outer ring 2 can be easily fitted into the housing 1 even if it moves slightly.
[0016]
On the other hand, if the diameter d of the wedge member 9 is considerably smaller than the height H at the deepest position of the slit groove 2b, the digging angle α between the inner peripheral surface 1a of the housing 1 and the wedge member 9 increases, and the slip occurs. And creep cannot be prevented. Therefore, from the viewpoint of work efficiency and creep prevention, α is most preferably about 5 ° to 15 °.
[0017]
[Experimental example]
FIG. 7 is a diagram showing an example of a creep test performed using the rolling bearing of the present invention. As shown in FIG. 8, the apparatus used in this test has an outer ring 2 of a rolling bearing fitted to a housing 1, a rotating shaft 11 fitted and fixed to an inner ring 3, and A rotating shaft 11 is erected, and a disk member 12 to which a weight 13 is attached is fixed so that an eccentric load is applied to the rotating shaft 11.
In this device, the bite angle alpha, 10 °, the outer diameter of the outer ring 2, 52 mm, the rotary shaft diameter which fits the outer diameter 1 mm, the inner ring 3 of the wedge member 9, 20 mm, times and subjected to the rotation shaft rotation The speed (r / min) is shown on the horizontal axis of the table, and the eccentric rotation load applied to the inner ring rotation axis) is as shown on the lower horizontal axis of FIG. The eccentric rotation load was applied by attaching a disk member to the rotation shaft 11 and placing a 50 g weight at a position 60 mm from the center of the rotation shaft. As can be seen from the experimental results, no creep occurred according to the rolling bearing of the present invention.
[0018]
When the relative rotation occurs between the housing 1 and the outer ring 2, the wedge member 9 rolls on the slit groove 2 b when a relative rotation occurs between the housing 1 and the outer ring 2, and a narrow space between the slit groove 2 b and the housing 1. Any shape, such as a cylindrical roller, can be used as long as it moves to a portion and acts as a wedge. Further, the number of the wedge members 9 may be single or plural.
[0019]
【The invention's effect】
As described above in detail, according to the rolling bearing of the present invention, no creep occurs even if a large rotating torque is applied. Therefore, creep can be extremely effectively prevented. Further, in this rolling bearing, only a tangential slit groove is formed in the outer ring, a cartridge accommodating the wedge member can be easily formed, and a conventional ball or roller can be used as the wedge member. Therefore, it can be manufactured at a low cost and is excellent in durability.
[Brief description of the drawings]
FIG. 1A is a partial cross-sectional view in the axial direction of a rolling bearing according to the present invention, showing a state where the rolling bearing is fitted to a housing. FIG. 1B is a view taken in the direction of arrows AA in FIG.
2 (A) is a cross-sectional view taken along the line BB of FIG. 1, and FIG. 2 (B) is a plan view taken along the arrow P of FIG. 2 (A).
FIG. 3 is a partial cross-sectional view in a direction perpendicular to the axial direction of the outer ring, showing a relationship between a depth of a groove formed in the outer ring and a diameter of a ball serving as a wedge member.
FIG. 4 is a diagram schematically showing a process of manufacturing a cartridge used in the present invention by press working using a metal plate.
FIG. 5 is a perspective view showing a box-shaped member used in the present invention with a wedge member inserted therein.
FIG. 6 is a view showing a wedge member used in the present invention inserted into a semicircular groove of an outer race, and showing a penetration angle between an inner peripheral surface of a housing and the wedge member.
FIG. 7 is a view showing an experimental result of a creep test performed using the rolling bearing of the present invention.
FIG. 8 is a diagram showing a configuration of a creep test apparatus performed using the rolling bearing of the present invention.
FIG. 9 is a partial sectional view in the axial direction of a rolling bearing provided with a conventional creep preventing means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 1a Housing inner peripheral surface 2 Outer ring 2b Semicircular groove 8 Box-shaped cartridge 8a Box-shaped cartridge long hole 9 Wedge member

Claims (3)

ハウジング又は固定部に嵌合する外輪と、内輪と、これら外輪と内輪との間に配置される転動体とを備えた転がり軸受において、
前記外輪外周に接線方向のスリット溝を設けると共に、該溝に、該溝の最も深い位置の高さと同等若しくはこれより少し小さい外径を有する楔部材を移動自在に配置して成ることを特徴とする転がり軸受。In a rolling bearing including an outer ring fitted to a housing or a fixed portion, an inner ring, and a rolling element disposed between the outer ring and the inner ring,
A tangential slit groove is provided on the outer periphery of the outer ring, and a wedge member having an outer diameter equal to or slightly smaller than the height of the deepest position of the groove is movably arranged in the groove. Rolling bearings. 前記溝に嵌合し、内部で楔部材を移動自在に保持すると共に、外輪外周面側に該楔部材の一部を露出する長穴を設けた箱状のカートリッジを配置して成ることを特徴とする請求項１に記載の転がり軸受。A wedge member is fitted in the groove, movably holds the wedge member inside, and a box-shaped cartridge provided with an elongated hole exposing a part of the wedge member on the outer peripheral surface of the outer ring is arranged. The rolling bearing according to claim 1. 楔部材が、玉である請求項１または２に記載の転がり軸受。3. The rolling bearing according to claim 1, wherein the wedge member is a ball.
JP2002281388A 2002-09-26 2002-09-26 Rolling bearing Expired - Fee Related JP4193034B2 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007087701A1 (en) * 2006-01-31 2007-08-09 John Horvat Bearing anti creep device & method
JP2008275124A (en) * 2007-05-07 2008-11-13 Nsk Ltd Creep prevention mechanism for bearing
WO2009047973A1 (en) * 2007-10-10 2009-04-16 Ntn Corporation Shaft supporting device
JP2013029201A (en) * 2012-09-26 2013-02-07 Nsk Ltd Creep prevention mechanism for bearing
WO2013125378A1 (en) * 2012-02-24 2013-08-29 三菱重工業株式会社 Bearing device
US11326644B2 (en) * 2018-09-19 2022-05-10 Ntn Corporation Bearing assembly
DE102021105661A1 (en) 2021-03-09 2022-09-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Bearing arrangement for a rotor shaft of an electric machine dimensioned for the electric drive of a motor vehicle

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007087701A1 (en) * 2006-01-31 2007-08-09 John Horvat Bearing anti creep device & method
JP2008275124A (en) * 2007-05-07 2008-11-13 Nsk Ltd Creep prevention mechanism for bearing
WO2009047973A1 (en) * 2007-10-10 2009-04-16 Ntn Corporation Shaft supporting device
WO2013125378A1 (en) * 2012-02-24 2013-08-29 三菱重工業株式会社 Bearing device
JP2013174278A (en) * 2012-02-24 2013-09-05 Mitsubishi Heavy Ind Ltd Bearing device
US8911152B2 (en) 2012-02-24 2014-12-16 Mitsubishi Heavy Industries, Ltd. Bearing
JP2013029201A (en) * 2012-09-26 2013-02-07 Nsk Ltd Creep prevention mechanism for bearing
US11326644B2 (en) * 2018-09-19 2022-05-10 Ntn Corporation Bearing assembly
DE102021105661A1 (en) 2021-03-09 2022-09-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Bearing arrangement for a rotor shaft of an electric machine dimensioned for the electric drive of a motor vehicle

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