JP4193034B2 - Rolling bearing - Google Patents

Rolling bearing Download PDF

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Publication number
JP4193034B2
JP4193034B2 JP2002281388A JP2002281388A JP4193034B2 JP 4193034 B2 JP4193034 B2 JP 4193034B2 JP 2002281388 A JP2002281388 A JP 2002281388A JP 2002281388 A JP2002281388 A JP 2002281388A JP 4193034 B2 JP4193034 B2 JP 4193034B2
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Japan
Prior art keywords
outer ring
wedge member
housing
rolling bearing
creep
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JP2004116659A (en
Inventor
陽三 谷口
潤仁 後藤
幹雄 黒松
重徳 坂東
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JTEKT Corp
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JTEKT Corp
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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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

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（１）又は固定部に嵌合する外輪（２）と、内輪（３）と、これら外輪と内輪との間に配置される転動体（５）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（２ｂ）を設けると共に、該スリット溝（２ｂ）に嵌合し、該スリット溝（２ｂ）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（９）を移動自在に内部で保持すると共に、外輪外周面側に該楔部材（９）の一部が露出する長孔（８ａ）を設けた箱状のカードリッジ（８）を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、請求項１の楔部材（９）が、玉またはコロであることを特徴とするものである。
【０００９】
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）。
【００１０】
【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。
【００１１】
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。
【００１２】
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。
【００１３】
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。
【００１４】
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。
【００１５】
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。
【００１６】
【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。
【００１７】
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。
【００１８】
【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]
BACKGROUND OF THE INVENTION
The present invention is, for example, a bearing that is fitted in a position where temperature changes or vibration is likely to occur, and can prevent creep that occurs between a fixed portion such as a housing and an outer ring as the inner ring rotates. It relates to rolling bearings.
[0002]
[Prior art]
When the outer ring of the rolling bearing is used by fitting the outer ring into the housing with a clearance fit or a relatively light force, so-called creep may occur when a rotational force is applied to the outer ring for some reason. For example, creep may occur when a rotational force acts on the outer ring due to vibration or impact. In addition, if the coefficient of thermal expansion of the housing is greater than that of the bearing outer ring due to temperature rise, creep tends to occur.
[0003]
Various proposals have been made for the prevention of creep between the housing and the bearing outer ring. For example, an endless elastic ring in which an annular groove eccentric to the outer periphery of the outer ring to be fitted to the housing is provided to form a bulge portion in part and the end portion is overlapped, and the overlap portion is As shown in FIG. 9 of Patent Document 1, the outer circumferential surface 22a of the outer ring 22 fitted in a housing or the like is formed by fitting a thicker annular groove than the shallowest groove portion into the annular groove. The concave groove 24 is provided around the concave groove 24 and one or two O-rings 23 are attached to the concave groove 24 so that the radius thereof is slightly larger than the outer radius of the outer ring 22 by A. Proposals have also been made to improve the creep generation limit by force (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
JP 2002-130309 A
[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 has a problem in the life, and the limit point of occurrence of creep is not so large. In the above, there was a problem that creep occurred and the housing was worn.
[0006]
The present invention has been made in order to cope with the above-described problems, is relatively easy to process, does not generate creep even when a large rotational force is applied, has a long life, and is excellent in durability. An object of the present invention is to provide a rolling bearing for preventing creep.
[0007]
[Means for Solving the Problems]
That is, in order to solve the above-described problems, the invention described in claim 1 includes an outer ring (2) , an inner ring (3), and an outer ring and an inner ring that are fitted to the housing (1) or the fixed portion. In a rolling bearing provided with rolling elements (5) arranged between
Provided with a tangential slit groove (2b) in the outer ring outer periphery, fitted in the slit groove (2b), has a deepest height equal to or outer diameter slightly smaller than this position of the slit groove (2b) movably the wedge member (9) holds internally arranged elongated holes partially exposed box-shaped card ridge having a (8a) (8) of the wedge member (9) to the outer ring outer circumferential surface It is characterized by comprising .
[0008]
The invention described in claim 2 is characterized in that the wedge member (9) of claim 1 is a ball or a roller .
[0009]
According to each of the above means of the present invention, even if creep is to occur between the housing 1 and the outer ring 2 that is loosely fitted or lightly press-fitted, it 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 and bites by a wedge effect in a narrow space between the inner peripheral surface 1a of the housing 1 and the groove 2b, and the relative rotation between the housing 1 and the outer ring 2 is made like a one-way clutch. To stop. Accordingly, creep can be almost completely prevented (see FIGS. 1 to 3).
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a partial sectional view in the axial direction of a rolling bearing according to the present invention, and shows a state in which the rolling bearing is fitted in a housing. FIG. 1B is a view taken along arrow AA in FIG. 2A is a cross-sectional view taken along the line B-B in FIG. 1, and FIG. 2B is a plan view taken along the arrow P in FIG. The rolling bearing includes an outer ring 2 that is press-fitted into the housing 1 with a clearance or a light load, an inner ring 3, a rolling element 5 that is disposed in an annular space 4 between the outer ring 2 and the inner ring 3, and the rolling element. And a cage 6 that holds 5. In this rolling bearing, grooves 2 a and 2 a are formed at both inner peripheral ends of the outer ring 2, and the shield plates 7 and 7 seal the annular space 4 in which the rolling elements 5 are arranged.
[0011]
A part of the outer periphery of the outer ring 2 is provided with a tangential slit groove 2b to form an arcuate space. As shown in FIG. 3, the slit groove 2b is fitted with 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. When a relative rotation (creep) occurs between the housing 1 and the outer ring 2, the wedge member 9 rolls in the slit groove 2b and acts as a wedge between the slit groove 2b and the inner peripheral surface 1a of the housing 1. It becomes a member to do.
[0012]
Next, the cartridge 8 for holding the wedge member 9 is made of a thin metal plate or synthetic resin, and the side surface shape is such that the side surface shape of the arcuate slit groove 2b formed in the outer ring 2 does not protrude. . For example, the side surface shape is formed in a similar shape along the side surface shape of the arcuate slit groove 2 b, and a long hole 8 a is provided on the outer peripheral surface side of the outer ring of the cartridge 8. The ball wedge member 9 is held movably within the range of the elongated hole 8a. The cartridge 8 stably holds the wedge member 9 and facilitates assembly work when the housing 1 and the outer ring 2 are fitted together. The cartridge 8 is slightly elastic in the arcuate slit groove 2b of the outer ring 2. It is deformed and fitted. Further, as described above, the wedge member 9 moves within the range of the long hole 8a, but a part of the long hole 8a protrudes from both ends and engages between the outer ring 2 and the housing 8 (wedge action). )
[0013]
FIG. 4 is a simple diagram showing a process of manufacturing the cartridge 8 by pressing using a metal plate. As shown in FIG. 4A, first, an octagon having two sides 8b, 8b long in the longitudinal direction, and a plate material is punched out with a long hole 8a in the center. Next, along the folding lines 8c and 8c in FIG. 4 (A), it is bent as shown in FIGS. 4 (B) and 4 (C) and bent as a whole, as shown in the perspective view of FIG. A curved box shape. 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 2b provided in the outer ring 2.
[0014]
FIG. 6 is a view showing a biting angle between the inner peripheral surface of the housing 1 and the ball wedge member 9. The outer diameter d of the wedge member 9 disposed in the arcuate slit groove 2b provided in the outer ring 2 is the same as or slightly smaller than the height H of the deepest position of the slit groove 2b (see FIG. 3). ). When the diameter d of the wedge member 9 is the same as the height H of 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 outer ring 2 having the cartridge 8 disposed in the groove 2b is fitted into the housing 1, if the wedge member 9 moves even a little, the wedge member 9 protrudes from the outer peripheral surface of the outer ring 2, so that it is difficult to fit into the housing. . Therefore, it is preferable in terms of work efficiency that the diameter d of the wedge member 9 is slightly smaller than the height H of 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.
[0015]
On the other hand, when the diameter d of the wedge member 9 is considerably smaller than the height H of the deepest position of the slit groove 2b, the biting angle α between the inner peripheral surface 1a of the housing 1 and the wedge member 9 becomes large, and slipping occurs. Will occur and creep will not be prevented. Therefore, from the viewpoint of work efficiency and prevention of creep, α is best about 5 ° to 15 °.
[0016]
[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 a housing 1 fitted with an outer ring 2 of a rolling bearing, a rotary shaft 11 fitted and fixed to an inner ring 3, and the other bearing 10 with the outer ring 2. A rotating shaft 11 is installed, and a disk member 12 to which a weight 13 is attached is fixed to the rotating shaft 11 so that an eccentric load is applied.
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 rotational load applied to the inner ring rotary shaft is as shown on the lower horizontal axis of FIG. The eccentric rotational load was applied by attaching a disk member to the rotary shaft 11 and placing a 50 g weight at a position 60 mm from the center of the rotary shaft. As can be seen from the experimental results, the rolling bearing of the present invention did not creep at all.
[0017]
The wedge member 9 is not limited to a ball, and when relative rotation occurs between the housing 1 and the outer ring 2, the wedge member 9 rolls on the slit groove 2 b and is a narrow space between the slit groove 2 b and the housing 1. If it moves to a part and acts as a wedge, the shape, such as a cylindrical roller, does not matter. Further, the number of wedge members 9 may be singular or plural.
[0018]
【The invention's effect】
As described above in detail, according to the rolling bearing of the present invention, creep does not occur at all even if a large rotational torque is applied. Therefore, creep can be prevented very effectively. In addition, this rolling bearing only forms a tangential slit groove on the outer ring, a cartridge for accommodating the wedge member can also be easily processed, and the conventional ball or roller can be used as the wedge member. Therefore, it can be manufactured at low cost and has excellent durability.
[Brief description of the drawings]
FIG. 1 (A) is a partial cross-sectional view in the axial direction of a rolling bearing according to the present invention, showing a state of being fitted to a housing. FIG. 1B is a view taken along arrow AA in FIG.
2A is a cross-sectional view taken along the line BB in FIG. 1, and FIG. 2B is a plan view taken along the arrow P in FIG. 2A.
FIG. 3 is a partial cross-sectional view perpendicular to the axial direction of the outer ring, showing the relationship between the depth of a groove formed in the outer ring and the diameter of a ball that is a wedge member.
FIG. 4 is a diagram simply 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 state in which a wedge member is inserted into a box-shaped member used in the present invention.
FIG. 6 is a view showing a biting angle between the inner peripheral surface of the housing and the wedge member when the wedge member used in the present invention is put in a semicircular groove of the outer ring.
FIG. 7 is a diagram 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 Inner peripheral surface 2 Outer ring 2b Semicircular groove 8 Box-shaped cartridge 8a Slot hole of box-shaped cartridge 9 Wedge member

Claims (2)

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、該スリット溝に嵌合し、該スリット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内部で保持すると共に、外輪外周面側に該楔部材の一部が露出する長孔を設けた箱状のカードリッジを配置して成ることを特徴とする転がり軸受。 In a rolling bearing comprising an outer ring that fits in a housing or a fixed part, an inner ring, and rolling elements that are arranged between the outer ring and the inner ring,
Provided with a tangential slit grooves on the outer ring periphery, fitted in the slit groove, movably held in the deepest position in the height equal to or wedge member having an outer diameter slightly smaller than this of the slit groove In addition, a rolling bearing comprising a box-shaped cartridge provided with a long hole through which a part of the wedge member is exposed on the outer peripheral surface side of the outer ring. 楔部材が、玉またはコロである請求項１に記載の転がり軸受。The rolling bearing according to claim 1, wherein the wedge member is a ball or a roller.
JP2002281388A 2002-09-26 2002-09-26 Rolling bearing Expired - Fee Related JP4193034B2 (en)

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Application Number Priority Date Filing Date Title
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JP4193034B2 true JP4193034B2 (en) 2008-12-10

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Publication number Priority date Publication date Assignee Title
WO2007087701A1 (en) * 2006-01-31 2007-08-09 John Horvat Bearing anti creep device & method
JP5194551B2 (en) * 2007-05-07 2013-05-08 日本精工株式会社 Anti-creep mechanism for bearings
JP2009092155A (en) * 2007-10-10 2009-04-30 Ntn Corp Shaft support device
JP5851880B2 (en) 2012-02-24 2016-02-03 三菱重工業株式会社 Bearing device
JP5488938B2 (en) * 2012-09-26 2014-05-14 日本精工株式会社 Anti-creep mechanism for bearings
JP7152916B2 (en) * 2018-09-19 2022-10-13 Ntn株式会社 bearing device
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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