JP4042999B2 - Manufacturing method of split type rolling bearing - Google Patents

Manufacturing method of split type rolling bearing Download PDF

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Publication number
JP4042999B2
JP4042999B2 JP34392196A JP34392196A JP4042999B2 JP 4042999 B2 JP4042999 B2 JP 4042999B2 JP 34392196 A JP34392196 A JP 34392196A JP 34392196 A JP34392196 A JP 34392196A JP 4042999 B2 JP4042999 B2 JP 4042999B2
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Japan
Prior art keywords
inner ring
axial direction
annular recess
notch
rolling bearing
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JP34392196A
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JPH10184674A (en
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有一 中川
匡 御手洗
尚久 赤澤
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JTEKT Corp
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JTEKT Corp
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Priority to DE19824258A priority patent/DE19824258B4/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
    • 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
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • 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
    • F16C23/084—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface sliding on a complementary spherical surface
    • 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
    • F16C19/24—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 radial load mainly
    • F16C19/26—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 radial load mainly with a single row of rollers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Support Of The Bearing (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、内輪または外輪が自然割りによって軸心に沿って２分割されている分割形転がり軸受の製造方法に関する。
【０００２】
【従来の技術】
例えば、製鉄所の連続鋳造設備の圧延ロール等に組み付けてこれを支持するものとして、軸心に沿って軌道が分割されたタイプの分割形転がり軸受がある。
この種の分割形転がり軸受として、あらかじめ所定の寸法精度を持って仕上げられた内輪若しくは外輪を、ノッチ等を用いて軸方向に沿って２つ割りに分割し、これらを合わせ面で組み合わせて結合する形式の、いわゆる自然割りを利用したものが提供されている。
【０００３】
一方、上記の内輪や外輪に、鍔や締結リング係止用の段部やシール体収容用の環状凹部等、環状の凹凸形状が付与されている場合があり、この場合、断面形状が複雑となる結果、スムーズに割りを入れることができない。
そこで、従来、自然割りとしては、軌道面を挟んだ軸方向両端側において、軌道輪の軸心を通る対称位置で相対した一対のスリットを、上記の凹凸形状を完全に横断するようにして設け、これら２つのスリットから同時に割りを入れていくタイプが一般的である（例えば実公昭６３−４６７２５号公報参照。）。
【０００４】
【発明が解決しようとする課題】
しかしながら、割りを入れた際に、各スリットから進行する割れ線（クラック）の先端が互いに一致しない、いわゆる複合クラックとなり易く、このため、不良品発生率が高くなる。特に、両スリットの相対位置精度が悪い場合に、この傾向が顕著である。
【０００５】
また、図６（ａ）に示すように、ノッチ９１のみを設けた場合では、ノッチ角βよりも工具の刃先角γを必ず大きくする必要があり、このため、ノッチ９１の両縁部９３と工具９２とが線接触となり、この部分で高荷重が発生する結果、ノッチ９１の縁部９３が欠けたり、工具９２の寿命が低下したりする。図６（ｂ）に示すように、スリット９４のみを設けた場合も、スリット９４の開口縁部９６で線接触となり、ノッチの場合と同様の問題がある。
【０００６】
そこで、本発明は、精度の良い自然割りを実現できる分割形転がり軸受の製造方法を提供することを目的とする。また、ワークの欠損を防止し且つ工具寿命を長くすることのできる分割形転がり軸受の製造方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明の請求項１記載の発明は、少なくとも内輪が自然割りによって軸心に沿って２分割された一対の分割体からなり、内輪は、当該内輪の軸方向の両端において、当該内輪の内径面に設けられた湾曲状の面取りを含み、内輪は、当該内輪の外径面に、相手材に面接触するパッキンが収容が収容される第１の環状凹部と、相手材にリップで接触するオイルシールが収容される第２の環状凹部とを含み、第１の環状凹部は第２の環状凹部よりも内輪の軸方向の端部側に配置されている分割形転がり軸受を製造するための分割形転がり軸受の製造方法において、円筒状の内輪素材の軸方向の端部に設けられた、Ｖ字形形状のノッチ部およびこのノッチ部の先端から軸方向へ延びるスリットを含む分割用の切欠部に、工具を押し込んで自然割りする工程を含み、上記ノッチ部のＶ字を構成する一対の斜面の延長面の交線が、内輪の軸方向に関して、第１の環状凹部に対応する位置に配置され、上記スリットの先端が、内輪の軸方向に関して、第２の環状凹部に対応する位置に配置され、上記Ｖ字形形状のノッチ部の開き角度と工具の刃先角との角度差が５度以内に設定されていることを特徴とするものである。
【０００８】
請求項２記載の発明は、請求項１において、上記切欠部は、内輪素材の軸方向の一方の端部のみに形成されていることを特徴とするものである。請求項２記載の発明では、単一の切欠部を用いて内輪を自然割りするので、一対のスリットを設けた場合のような割れ線の不一致による不良品発生という問題の発生を回避できる。
【００１０】
また、請求項１，２のように、軌道輪としての内輪に、パッキンを収容するための第１の環状凹部とオイルシールを収容するための第２の環状凹部が形成されている場合、断面形状が複雑となる。この断面形状が複雑な部分に割りをスムーズに入れるためには、できるだけ軌道面に近い位置まで、スリットが延びていることが望ましい。一方、オイルシールが収容される、内輪の軸方向の端部から遠い側の第２の環状凹部を完全に横切ってしまうスリットを入れておいた場合、密封性能に影響を与えるおそれがある。そこで、スリットが第２の環状凹部まで延びるようにし、割り容易性と密封性の双方を両立するようにした。
【００１１】
ここで、上記スリットは、内輪素材の軸方向に関して、第２の環状凹部の途中部まで延びていれば好ましく中央部まで延びていればより好ましい。なお、途中部とは、第２の環状凹部の底面の両隅部に挟まれた平坦面部を意味し、中央部とは第２の環状凹部の軸方向全幅を１００％とすると第２の環状凹部の軸方向一端側から４０〜６０％の範囲を意味する。
【００１２】
【発明の実施の形態】
本発明の好ましい実施の形態を添付図面を参照しつつ説明する。
図１は本発明の一実施形態として分割形転がり軸受の正面断面図であり、図２および図３は本分割形転がり軸受が、例えば連続鋳造設備の圧延ロールのロールネック部を支持する装置に適用された状態を示す、図１のＸ−Ｘ線に沿う断面図の上側部分と下側部分である。
【００１３】
図１，図２および図３を参照して、本分割形転がり軸受Ａでは、上側軸受箱を兼用する上側外輪半体２と、下側軸受箱３よって支持された半円状の下側外輪半体４とが組み合わせられて外輪５を構成する一方、２分割された内輪半体１Ａ，１Ｂを組み合わせて内輪１を構成しており、これら内輪１と外輪５の軌道面同士の間に、多数の円筒ころ１５を介在させている。２分割された内輪１は他の部分よりも細くされたロールネック部１６に嵌め合わされている。
【００１４】
図２および図３を参照して、内輪１は外周中央部に環状凹部６を形成しており、この環状凹部６の底面によって軌道面６ａを構成している。軌道面６ａを軸方向に挟んだ両側には、それぞれシール体としてのオイルシール７を装着するための一対の環状凹部８が形成されており、これら環状凹部８のさらに外側には、シール体としてのパッキン９を装着するための一対の環状凹部１０が形成されている。
【００１５】
上側軸受箱２および下側軸受箱３の軸方向の両端部には、それぞれ有端状のラビリンスリング１１が固定されており、各ラビリンスリング１１は、ロールネック部１６を挟んだロール端面にそれぞれ形成される凹溝１２にそれぞれ挿入されてラビリンス形のシール構造を形成している。一方、各ラビリンスリング１１の内周面は、オイルシール７およびパッキン９による摺接を受けるシール面１３を構成している。
【００１６】
図３を参照して、下側外輪半体４の内周面には軌道面４ａが形成されている。また、下側外輪半体４の外周面４ｂは球面状に形成され、下側軸受箱３の球面溝３ａに摺動自在に嵌められている。１４は、下側外輪半体４の外周面に取り付けられたノックピンであり、球面溝３ａの底部中央に形成された凹部４ｂに、遊びを持って収容されている。
【００１７】
図４は分割前の内輪１（軌道輪素材に相当）の断面図であり、軸方向の一方の端部のみに、割り入れ用の切欠部２０が形成されている。この切欠部２０は、Ｖ字形形状のノッチ部２１と、このノッチ部２１に連続して延びるスリット２２とからなる。スリット２２は、軸心に沿っており、その先端が、オイルシール７収容用の環状凹部８の途中部に対応する位置まで、好ましくは中央部まで延びている。途中部とは、環状凹部の底面の両隅部に挟まれた平坦面部を意味し、中央部とは環状凹部の軸方向全幅を１００％とすると環状凹部の軸方向一端側から４０〜６０％の範囲を意味する。
【００１８】
図５を参照して、ノッチ部２１の開き角度β（以下、ノッチ角βという）は、工具３０の刃先角γと等しく設定されている。実際上は、両者の間に例えば５°以内の角度差は許容される。上記のノッチ角βとしては、工具３０のノッチ部２１側への押し込み速度によって異なるが、３０°〜９０°の範囲であることが、割れ線（クラック）を真直にするうえで好ましい。
【００１９】
本実施形態では、下記の利点がある。すなわち、軌道面を挟んだ両側に配置した一対のスリットから割れ線を発生させる従来では、各スリットから発生する割れ線が不一致となる不良があったが、本実施形態では、単一の切欠部２０を用いて内輪１を自然割りするようにしたので、従来のような割れ線の不一致に起因した不良品の発生を防止でき、不良率を格段に減少させることができる。
【００２０】
また、ノッチのみやスリットのみを用いて割りを入れる従来の場合では、工具が線接触することに起因して、ノッチ縁部の欠け発生や工具寿命の低下の問題があったが、本実施形態では、スリット２２の入口側にノッチ部２１を連続させてあるので、ノッチ部２１へ挿入する工具３０の刃先角γをノッチ角βに略等しくしておいても、割りを入れることが可能である。そして、ノッチ部２１へ挿入する工具の刃先角γをノッチ角βに略等しくできる結果として、ノッチ縁部の欠けや工具寿命の低下を防止できる。
【００２１】
また、切欠部２０の先端（すなわちスリット２２の先端）が、環状凹部８の軸方向の途中部まで、好ましくは中央部まで延びるようにしたので、密封性能を維持しつつ円滑且つ精度の良い自然割りを実現できる。
なお、上記実施形態では、内輪が分割されるタイプに則して説明したが、本発明は、外輪を分割する場合にも適用することができる。また、内輪、外輪の双方を分割する場合にも適用することができる。
【００２２】
【発明の効果】
請求項１記載の発明では、ノッチ部とスリットとを組み合わせてあるので、ノッチ部へ挿入する開き工具の先端角をノッチ角に略等しくしておいても、割りを入れることが可能である結果、可及的に、ノッチ縁部の欠けや工具寿命の低下を防止できる。
また、スリットの先端が、内輪の軸方向に関して、第２の環状凹部に対応する位置まで延びるようにしたので、密封性能を維持しつつ円滑且つ精度の良い自然割りを実現できる。
請求項２記載の発明では、単一の切欠部を用いて軌道輪を自然割りするので、一対のスリットを設けた場合のような割れ線の不一致に起因した不良品の発生を防止でき、不良率を格段に減少させることができる。
【図面の簡単な説明】
【図１】本発明の一実施形態の分割形転がり軸受の正面断面図である。
【図２】図１のＸ−Ｘ線に沿って切断した、分割形転がり軸受の上半分を示す断面図である。
【図３】図１のＸ−Ｘ線に沿って切断した、分割形転がり軸受の下半分を示す断面図である。
【図４】分割前の内輪の断面図である。
【図５】切欠部および工具の概略図である。
【図６】（ａ）および（ｂ）はそれぞれ従来の割り入れ構造の概略図である。
【符号の説明】
１ 内輪
２ 上側外輪半体（上側軸受箱）
３ 下側軸受箱
４ 下側外輪半体
５ 外輪
６ａ 軌道面
７ オイルシール
８ 環状凹部
９ パッキン
１０ 環状凹部
１５ 円筒ころ（転動体）
１６ ロールネック部
２０ 切欠部
２１ ノッチ部
２２ スリット
３０ 工具
β ノッチ角
γ 刃先角
Ｌ 軸心[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a split type rolling bearing in which an inner ring or an outer ring is split into two along an axis by natural splitting.
[0002]
[Prior art]
For example, there is a split-type rolling bearing of the type in which the raceway is divided along an axial center as one that is assembled and supported on a rolling roll of a continuous casting facility of an ironworks.
As this kind of split type rolling bearing, the inner ring or outer ring, which has been finished with a predetermined dimensional accuracy in advance, is divided into two along the axial direction using notches etc., and these are combined at the mating surface and combined. In the form of the so-called natural splitting is provided.
[0003]
On the other hand, the above-described inner ring or outer ring may be provided with an annular uneven shape such as a hook or a fastening ring locking step or an annular recessed portion for accommodating a seal body. As a result, it cannot be smoothly divided.
Therefore, conventionally, as a natural split, a pair of slits opposed to each other at symmetrical positions passing through the axis of the raceway ring are provided on both ends in the axial direction across the raceway surface so as to completely traverse the above-described uneven shape. In general, a type in which splitting is simultaneously performed from these two slits (see, for example, Japanese Utility Model Publication No. 63-46725).
[0004]
[Problems to be solved by the invention]
However, when splitting, the crack lines (cracks) proceeding from the slits are not easily aligned with each other, and so-called composite cracks are likely to occur, and the defective product generation rate is increased. This tendency is particularly remarkable when the relative positional accuracy of both slits is poor.
[0005]
As shown in FIG. 6A, when only the notch 91 is provided, it is necessary to make the cutting edge angle γ of the tool larger than the notch angle β. The tool 92 is brought into line contact, and a high load is generated at this portion. As a result, the edge portion 93 of the notch 91 is chipped or the life of the tool 92 is reduced. As shown in FIG. 6B, even when only the slit 94 is provided, line contact is made at the opening edge 96 of the slit 94, which causes the same problem as in the case of the notch.
[0006]
Then, an object of this invention is to provide the manufacturing method of the split-type rolling bearing which can implement | achieve a natural split with sufficient precision. Another object is to provide a method of manufacturing a split rolling bearing which can lengthen the preventing and tool life defects word over click.
[0007]
[Means for Solving the Problems]
The invention of claim 1, wherein the present invention, Ri least the inner wheel Do a pair of divided bodies divided into two parts along the axis by natural split, the inner ring, in the axial direction of both ends of the inner ring, of the inner ring The inner ring includes a curved chamfer provided on the inner diameter surface, and the inner ring contacts the outer diameter surface of the inner ring with a first annular recess in which the packing that comes into surface contact with the counterpart material is accommodated, and the counterpart material with a lip For manufacturing a split type rolling bearing in which the first annular recess is disposed closer to the end of the inner ring in the axial direction than the second annular recess. the method of manufacturing a split rolling bearing, provided on the end portion in the axial direction of the cylindrical inner ring material, the V-shaped shape notch and division for including a slit extending from the tip of the notch portion in the axial direction the notch, naturally split push the tool And the intersection of the extended surfaces of the pair of inclined surfaces constituting the V-shape of the notch portion is disposed at a position corresponding to the first annular recess in the axial direction of the inner ring, and the tip of the slit is located at the inner ring With respect to the axial direction, the angular difference between the opening angle of the V-shaped notch and the cutting edge angle of the tool is set within 5 degrees. To do.
[0008]
According to a second aspect of the invention, according to claim 1, the notch is characterized in that it is formed only on one end portion in the axial direction of the inner wheel material. In the second aspect of the present invention, since the inner ring spontaneously split using a single notch, can avoid the occurrence of defective products arises a problem due to mismatch cracking lines as obtained when a pair of slits.
[0010]
Further, as in claims 1 and 2, when the inner ring as the raceway ring is formed with the first annular recess for accommodating the packing and the second annular recess for accommodating the oil seal , The shape becomes complicated. In order to smoothly break the section having a complicated cross-sectional shape, it is desirable that the slit extends as close to the track surface as possible. On the other hand, if a slit that completely crosses the second annular recess on the side far from the axial end of the inner ring in which the oil seal is accommodated is provided, the sealing performance may be affected. Therefore, the slit extends to the second annular recess so as to achieve both splitting ease and sealing performance.
[0011]
Here, the slit preferably extends to a middle portion of the second annular recess in the axial direction of the inner ring material, and more preferably extends to the center portion. Note that the middle part, means a flat surface portion sandwiched between both corners of the bottom surface of the second annular recess, the central part and has the axial entire width of the second annular recess to 100% a second annular It means a range of 40 to 60% from one axial end side of the recess.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a front sectional view of a split type rolling bearing as an embodiment of the present invention, and FIGS. 2 and 3 show an apparatus in which the split type rolling bearing supports, for example, a roll neck portion of a rolling roll of a continuous casting facility. It is the upper part and lower part of sectional drawing which follow the XX line | wire of FIG. 1 which shows the applied state.
[0013]
With reference to FIGS. 1, 2, and 3, in the split type rolling bearing A, a semicircular lower outer ring supported by an upper outer ring half 2 also serving as an upper bearing box and a lower bearing box 3. The outer ring 5 is combined with the half body 4, while the inner ring 1 is combined with the inner ring half bodies 1 </ b> A and 1 </ b> B divided into two parts, and between the raceways of the inner ring 1 and the outer ring 5, A large number of cylindrical rollers 15 are interposed. The inner ring 1 divided into two is fitted into a roll neck portion 16 which is thinner than other portions.
[0014]
With reference to FIGS. 2 and 3, the inner ring 1 has an annular recess 6 formed in the center of the outer periphery, and the bottom surface of the annular recess 6 constitutes a raceway surface 6 a. A pair of annular recesses 8 for mounting oil seals 7 as seal bodies are formed on both sides sandwiching the raceway surface 6a in the axial direction. A pair of annular recesses 10 for mounting the packing 9 is formed.
[0015]
Ended labyrinth rings 11 are fixed to both ends of the upper bearing box 2 and the lower bearing box 3 in the axial direction, and the labyrinth rings 11 are respectively attached to the roll end faces sandwiching the roll neck 16. A labyrinth-type seal structure is formed by being inserted into each of the formed concave grooves 12. On the other hand, the inner peripheral surface of each labyrinth ring 11 constitutes a seal surface 13 that receives sliding contact with the oil seal 7 and the packing 9.
[0016]
Referring to FIG. 3, a raceway surface 4 a is formed on the inner peripheral surface of the lower outer ring half 4. The outer peripheral surface 4 b of the lower outer ring half 4 is formed in a spherical shape and is slidably fitted in the spherical groove 3 a of the lower bearing box 3. A knock pin 14 is attached to the outer peripheral surface of the lower outer ring half 4 and is accommodated in a recess 4b formed at the center of the bottom of the spherical groove 3a with play.
[0017]
FIG. 4 is a cross-sectional view of the inner ring 1 (corresponding to the raceway ring material) before the division, and an notch 20 for insertion is formed only at one end in the axial direction. The notch 20 includes a V-shaped notch 21 and a slit 22 extending continuously from the notch 21. The slit 22 extends along the axial center, and its tip extends to a position corresponding to the middle portion of the annular recess 8 for accommodating the oil seal 7, preferably to the center. The middle part means a flat surface part sandwiched between both corners of the bottom surface of the annular recess, and the central part means 40 to 60% from one axial end side of the annular recess when the entire axial width of the annular recess is 100%. Means the range.
[0018]
Referring to FIG. 5, the opening angle β (hereinafter referred to as notch angle β) of the notch portion 21 is set to be equal to the cutting edge angle γ of the tool 30. In practice, an angle difference within 5 °, for example, is allowed between them. As said notch angle (beta), although it changes with pushing speed to the notch part 21 side of the tool 30, it is preferable when it is the range of 30 degrees-90 degrees, when making a crack line (crack) straight.
[0019]
This embodiment has the following advantages. That is, in the related art in which crack lines are generated from a pair of slits arranged on both sides of the raceway surface, there is a defect in which the crack lines generated from the slits do not match. Since the inner ring 1 is naturally split using 20, it is possible to prevent the occurrence of defective products due to the mismatch of crack lines as in the prior art, and to significantly reduce the defective rate.
[0020]
Further, in the conventional case in which only the notch or the slit is used for splitting, there is a problem of notch edge chipping or a decrease in tool life due to the line contact of the tool. Then, since the notch part 21 is made continuous at the entrance side of the slit 22, even if the cutting edge angle γ of the tool 30 to be inserted into the notch part 21 is made substantially equal to the notch angle β, it is possible to make a split. is there. As a result that the cutting edge angle γ of the tool inserted into the notch portion 21 can be made substantially equal to the notch angle β, it is possible to prevent the notch edge from being chipped and the tool life from being shortened.
[0021]
In addition, since the tip of the notch 20 (that is, the tip of the slit 22) extends to the middle part of the annular recess 8 in the axial direction, preferably to the center, the natural and smooth natural condition is maintained while maintaining the sealing performance. A split can be realized.
Although the above embodiment has been described according to the type in which the inner ring is divided, the present invention can also be applied to the case where the outer ring is divided. Further, the present invention can also be applied when both the inner ring and the outer ring are divided.
[0022]
【The invention's effect】
In the first aspect of the invention, since the notch portion and the slit are combined, even if the tip angle of the opening tool to be inserted into the notch portion is substantially equal to the notch angle, it is possible to make a split. As much as possible, chipping of the notch edge and reduction of the tool life can be prevented.
In addition, since the tip of the slit extends to a position corresponding to the second annular recess in the axial direction of the inner ring, a smooth and accurate natural split can be realized while maintaining the sealing performance.
In the invention according to claim 2, since the raceway is naturally split using a single notch, it is possible to prevent the occurrence of defective products due to crack line mismatch as in the case of providing a pair of slits. The rate can be significantly reduced.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a split rolling bearing according to an embodiment of the present invention.
2 is a cross-sectional view showing the upper half of the split rolling bearing cut along the line XX in FIG. 1. FIG.
3 is a cross-sectional view showing a lower half of the split rolling bearing cut along the line XX in FIG. 1. FIG.
FIG. 4 is a cross-sectional view of the inner ring before division.
FIG. 5 is a schematic view of a notch and a tool.
FIGS. 6A and 6B are schematic views of a conventional interruption structure, respectively.
[Explanation of symbols]
1 Inner ring 2 Upper outer ring half (upper bearing box)
3 Lower bearing box 4 Lower outer ring half 5 Outer ring 6a Raceway surface 7 Oil seal 8 Annular recess 9 Packing 10 Annular recess 15 Cylindrical roller (rolling element)
16 Roll neck portion 20 Notch portion 21 Notch portion 22 Slit 30 Tool β Notch angle γ Cutting edge angle L Axis center

Claims (2)

少なくとも内輪が自然割りによって軸心に沿って２分割された一対の分割体からなり、 内輪は、当該内輪の軸方向の両端において、当該内輪の内径面に設けられた湾曲状の面取りを含み、
内輪は、当該内輪の外径面に、相手材に面接触するパッキンが収容が収容される第１の環状凹部と、相手材にリップで接触するオイルシールが収容される第２の環状凹部とを含み、
第１の環状凹部は第２の環状凹部よりも内輪の軸方向の端部側に配置されている分割形転がり軸受
を製造するための分割形転がり軸受の製造方法において、
円筒状の内輪素材の軸方向の端部に設けられた、Ｖ字形形状のノッチ部およびこのノッチ部の先端から軸方向へ延びるスリットを含む分割用の切欠部に、工具を押し込んで自然割りする工程を含み、
上記ノッチ部のＶ字を構成する一対の斜面の延長面の交線が、内輪の軸方向に関して、第１の環状凹部に対応する位置に配置され、
上記スリットの先端が、内輪の軸方向に関して、第２の環状凹部に対応する位置に配置され、
上記Ｖ字形形状のノッチ部の開き角度と工具の刃先角との角度差が５度以内に設定されていることを特徴とする分割形転がり軸受の製造方法。 Ri Do at least the inner wheel pair of divided bodies divided into two parts along the axis by natural split, the inner ring, in the axial direction of both ends of the inner ring, the curved chamfer provided on the inner surface of the inner ring Including
The inner ring includes, on the outer diameter surface of the inner ring, a first annular recess in which the packing that comes into surface contact with the mating member is accommodated, and a second annular recess in which an oil seal that contacts the mating material with a lip is accommodated Including
The first annular recess is a split type rolling bearing that is disposed closer to the end of the inner ring in the axial direction than the second annular recess.
In the manufacturing method of the split type rolling bearing for manufacturing
Provided at an end portion in the axial direction of the cylindrical inner ring material, the notch for splitting notch of V-shaped configuration and including a slit extending from the tip of the notch portion in the axial direction, a natural split push the tool Including the steps of:
The line of intersection of the extended surfaces of the pair of inclined surfaces constituting the V shape of the notch portion is disposed at a position corresponding to the first annular recess with respect to the axial direction of the inner ring,
The tip of the slit is disposed at a position corresponding to the second annular recess with respect to the axial direction of the inner ring,
A method of manufacturing a split type rolling bearing, wherein an angle difference between an opening angle of the V-shaped notch portion and a cutting edge angle of the tool is set within 5 degrees. 上記切欠部は、内輪素材の軸方向の一方の端部のみに形成されていることを特徴とする請求項１記載の分割形転がり軸受の製造方法。The cutout, method of producing segmented rolling bearing according to claim 1, characterized in that it is formed only on one end portion in the axial direction of the inner wheel material.
JP34392196A 1996-12-24 1996-12-24 Manufacturing method of split type rolling bearing Expired - Fee Related JP4042999B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP34392196A JP4042999B2 (en) 1996-12-24 1996-12-24 Manufacturing method of split type rolling bearing
DE19824258A DE19824258B4 (en) 1996-12-24 1998-05-05 Split rolling bearing unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP34392196A JP4042999B2 (en) 1996-12-24 1996-12-24 Manufacturing method of split type rolling bearing
DE19824258A DE19824258B4 (en) 1996-12-24 1998-05-05 Split rolling bearing unit

Publications (2)

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JPH10184674A JPH10184674A (en) 1998-07-14
JP4042999B2 true JP4042999B2 (en) 2008-02-06

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EP2679844A4 (en) * 2011-02-25 2017-07-05 NSK Ltd. Split bearing ring, and manufacturing method for same

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JP4002108B2 (en) * 2002-01-18 2007-10-31 ヤマハ発動機株式会社 Rolling bearings and crankshaft bearings
JP4979249B2 (en) * 2006-03-16 2012-07-18 Ｎｔｎ株式会社 Crankshaft support structure
JP5098436B2 (en) 2007-05-24 2012-12-12 株式会社ジェイテクト Cylindrical roller bearing device
JP5982861B2 (en) * 2011-05-27 2016-08-31 日本精工株式会社 Method of manufacturing split race and bearing
EP3333439B1 (en) * 2016-12-09 2021-08-25 Eolotec GmbH Method for exchanging a used bearing, in particular for replacing a large bearing, such as the main bearing of a wind turbine and bearing arrangement

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US3977740A (en) * 1974-11-13 1976-08-31 Borg-Warner Corporation Roller bearing improvement
DE3112303C2 (en) * 1981-03-28 1987-10-01 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Cage divided in the circumferential direction for a double row spherical roller bearing
US5287623A (en) * 1992-01-24 1994-02-22 The Torrington Company Bearing split outer ring and method of assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2679844A4 (en) * 2011-02-25 2017-07-05 NSK Ltd. Split bearing ring, and manufacturing method for same

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