JP2003314565A - Bearing device - Google Patents

Bearing device

Info

Publication number
JP2003314565A
JP2003314565A JP2002118983A JP2002118983A JP2003314565A JP 2003314565 A JP2003314565 A JP 2003314565A JP 2002118983 A JP2002118983 A JP 2002118983A JP 2002118983 A JP2002118983 A JP 2002118983A JP 2003314565 A JP2003314565 A JP 2003314565A
Authority
JP
Japan
Prior art keywords
inner ring
inner rings
bearing device
axial direction
rings
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
JP2002118983A
Other languages
Japanese (ja)
Inventor
Katsuhiro Konno
勝広 今野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to JP2002118983A priority Critical patent/JP2003314565A/en
Publication of JP2003314565A publication Critical patent/JP2003314565A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22Bearings 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
    • F16C19/34Bearings 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
    • F16C19/38Bearings 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
    • F16C19/383Bearings 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 with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/388Bearings 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 with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with four rows, i.e. four row tapered roller bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00Apparatus used in shaping articles
    • F16C2322/12Rolling apparatus, e.g. rolling stands, rolls

Landscapes

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device in which reliability for a long term is secured. <P>SOLUTION: The protrusions 12Ab, 12Bb of inner rings 12A, 12B prohibit the relative rotation by the inner rings 12A, 12B, thereby controlling abrasion of end surfaces onto which the inner rings 12A, 12B are abutted and preventing reduction of the axial width of the inner rings 12A, 12B. By so doing, a proper clearance between conic rollers 14B, 14C is secured for the long term. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は、例えば鉄鋼設備の
圧延機等に用いられるロールネック軸受などを含む軸受
装置に関する。 【0002】 【従来の技術】熱間圧延機や冷間圧延機のワークロー
ル、中間ロールに使用されるロールネック軸受として
は、大荷重を支持することができる4列円錐ころ軸受等
が用いられるのが一般的である。 【0003】 【課題を解決するための手段】ところで、4列円錐ころ
軸受においては、通常、一対の内輪を組み合わせ、更に
3つ又は4つからなる外輪を、一対の内輪の間及び内輪
の軸線方向外側に一つずつ配置している。しかるに、円
筒状である内輪の端面同士を突き合わせて使用すると、
圧延時にロールネックより過大な力が伝達されて内輪が
クリープし端面同士がこすれて摩耗し、結果として内輪
の軸線方向幅が短くなることが恐れがある。 【0004】ところが、外輪の軸線方向幅は不変である
から、内輪の軸線方向幅が短くなると、ころとの間隙が
詰まり、焼き付きなどの不具合を生じさせる恐れがあ
る。従って、摩耗した内輪は早期に交換する必要があ
り、メンテナンスの手間がかかるという問題があった。 【0005】本発明は、かかる問題点に鑑み、長期間に
わたって信頼性を確保できる軸受装置を提供することを
目的とする。 【0006】 【課題を解決するための手段】かかる目的を達成すべ
く、本発明の軸受装置は、軸線方向に分割可能な内輪
と、軸線方向に分割可能な外輪と、前記内輪と前記外輪
との間において転動自在に配置された複列の転動体と、
を有し、前記分割可能な内輪は、組み合わせた状態で互
いに対して相対回転を禁止する禁止部を備えていること
を特徴とする。 【0007】 【作用】本発明の軸受装置によれば、軸線方向に分割可
能な内輪と、軸線方向に分割可能な外輪と、前記内輪と
前記外輪との間において転動自在に配置された複列の転
動体と、を有し、前記分割可能な内輪は、組み合わせた
状態で互いに対して相対回転を禁止する禁止部を備えて
いるので、動作時における内輪同士のこすれあいを抑制
でき、内輪の軸線方向幅の減少を防止して、ころの適正
な隙間を長期間にわたって確保できる。 【0008】尚、禁止部としては、たとえば一方の内輪
の端部に凸部を形成し、他方の内輪の端部に凸部に相補
した形状の凹部を形成し、かかる凸部と凹部と係合させ
ることで相対回転を防止する場合における凸部と凹部と
をいうが、それに限られない。 【0009】 【発明の実施の形態】以下、図面を参照して本発明の実
施の形態について詳細に説明する。図1は、本発明の実
施の形態にかかる軸受装置の断面図であり、図2は、か
かる実施の形態の軸受装置を分解した状態で示す断面図
である。尚、本軸受装置は、圧延機のロールネック(不
図示)を支持するものとする。 【0010】図1、2において、4列円錐ころ軸受であ
る軸受装置10は、不図示のワークロールを支持する軸
線方向に分割可能な2列の内輪12A、12Bと、不図
示のハウジングに取り付けられ軸線方向に分割可能な複
数列の外輪13A、13B,13Cと、内輪12A、1
2Bと外輪13A、13B、13Cとの間に、それぞれ
複数個配置された4列の円錐ころ(転動体)14A〜1
4Dと、円錐ころ14A〜14Dをそれぞれ保持する保
持器15A〜15Dとからなる。外輪13A,13Bの
間には、間座16Aが配置され、外輪13B,13Cの
間には、間座16Bが配置されている。 【0011】軸受10の両側には、密封装置20A,2
0Bが配置されている。密封装置20A,20Bは、内
輪12A、12Bと不図示のハウジングとの間を密封し
ている。内輪12Aは、その内周に螺旋溝12Aaを形
成しており、内輪12Bは、その内周に螺旋溝12Ba
を形成している。螺旋溝12Aa、12Baは、内部に
潤滑剤(たとえば潤滑剤を含浸した固体潤滑剤等でも良
い)を設けており、かかる潤滑剤により、内輪12A、
12Bと不図示のワークロールとの間が潤滑される。 【0012】図3は、内輪12Aの斜視図である。図3
において、内輪12Aは、内輪12Bに突き合わされる
端部の上半分を切り取ったごとき凸部12Abを形成し
ている。これに対し、内輪12Bは、内輪12Aに突き
合わされる端部に、短円筒の下半分を切り取ったごとき
凸部12Bbを形成している(図2参照)。禁止部を構
成する凸部12Ab,12Bbは、互いに相補的な形状
・寸法を有し、内輪12A、12Bを図1に示すように
組み付けたとき、互いに隙間なく密着するようになって
いる。 【0013】次に、本実施の形態の動作について説明す
る。図1において、圧延機のワークロール(不図示)が
内輪12A,12Bと共に回転すると、内輪12A,1
2Bと外輪13A,13B,13Cとの間を円錐ころ1
4A〜14Dが転動し、それにより不図示のハウジング
に対して、ワークロール1を回転自在に支持することが
できる。 【0014】このとき、内輪12A,12Bの凸部12
Ab,12Bbは、内輪12A、12Bの相対回転を禁
止するので、内輪12A、12Bの突き合わされた端面
が摩耗することが抑制され、内輪12A、12Bの軸線
方向幅の減少が防止されるので、円錐ころ14B、14
Cの適正な隙間を長期間にわたって確保できる。 【0015】以上、本発明を実施の形態を参照して説明
してきたが、本発明は上記実施の形態に限定して解釈さ
れるべきではなく、適宜変更・改良が可能であることは
もちろんである。禁止部としての内輪の端部形状は、実
施の形態に示す凸部の他に、テーパ面の組み合わせ、ピ
ン結合など、内輪同士の相対回転を禁止できる全ての形
状を含む。更に、本発明の軸受装置は、圧延機のロール
ネック軸の支持に限らず、他の用途に適用できることは
いうまでもない。 【0016】 【発明の効果】本発明の軸受装置によれば、軸線方向に
分割可能な内輪と、軸線方向に分割可能な外輪と、前記
内輪と前記外輪との間において転動自在に配置された複
列の転動体と、を有し、前記分割可能な内輪は、組み合
わせた状態で互いに対して相対回転を禁止する禁止部を
備えているので、動作時における内輪同士のこすれあい
を抑制でき、内輪の軸線方向幅の減少を防止して、ころ
の適正な隙間を長期間にわたって確保できる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing device including a roll neck bearing used for a rolling mill of steel equipment, for example. 2. Description of the Related Art As a roll neck bearing used for a work roll or an intermediate roll of a hot rolling mill or a cold rolling mill, a four-row tapered roller bearing capable of supporting a large load is used. It is common. [0003] In a four-row tapered roller bearing, a pair of inner rings is usually combined, and three or four outer rings are further provided between the pair of inner rings and the axis of the inner ring. They are arranged one by one on the outside in the direction. However, when the end faces of the cylindrical inner ring are used by abutting each other,
During rolling, an excessive force is transmitted from the roll neck, and the inner race is creeped, the end faces are rubbed and worn, and as a result, the axial width of the inner race may be reduced. However, since the width of the outer race in the axial direction is invariable, if the width of the inner race in the axial direction is reduced, the gap between the rollers and the rollers may be clogged, causing problems such as seizure. Therefore, it is necessary to replace the worn inner ring at an early stage, and there is a problem that maintenance work is required. [0005] In view of the above problems, an object of the present invention is to provide a bearing device which can ensure reliability for a long period of time. In order to achieve the above object, a bearing device according to the present invention comprises an inner ring which can be divided in an axial direction, an outer ring which can be divided in an axial direction, and the inner ring and the outer ring. A double row of rolling elements arranged to be able to roll freely between
And the splittable inner races are provided with a prohibition portion for prohibiting relative rotation with respect to each other in a combined state. According to the bearing device of the present invention, an inner ring which can be divided in the axial direction, an outer ring which can be divided in the axial direction, and a plurality of rollers which are arranged to be rotatable between the inner ring and the outer ring. And a row of rolling elements, and the splittable inner ring is provided with a prohibiting portion for prohibiting relative rotation with respect to each other in a combined state, so that rubbing between the inner rings during operation can be suppressed, Of the roller in the axial direction can be prevented, and a proper gap between the rollers can be secured for a long period of time. As the prohibiting portion, for example, a convex portion is formed at the end of one inner ring, and a concave portion having a shape complementary to the convex portion is formed at the end of the other inner ring. The protrusions and the recesses in the case where the relative rotation is prevented by the combination are referred to, but are not limited thereto. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a bearing device according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the bearing device of the embodiment in an exploded state. In addition, this bearing device shall support the roll neck (not shown) of a rolling mill. In FIGS. 1 and 2, a bearing device 10 which is a four-row tapered roller bearing is mounted on two rows of inner rings 12A and 12B which support a work roll (not shown) and which can be divided in the axial direction, and a housing (not shown). And a plurality of rows of outer races 13A, 13B, 13C that can be divided in the axial direction, and inner races 12A,
A plurality of four rows of tapered rollers (rolling elements) 14A to 14A, each of which is disposed between the outer ring 2B and the outer ring 13A, 13B, 13C.
4D and retainers 15A to 15D that respectively hold the tapered rollers 14A to 14D. A spacer 16A is disposed between the outer rings 13A and 13B, and a spacer 16B is disposed between the outer rings 13B and 13C. On both sides of the bearing 10, sealing devices 20A, 2
0B is arranged. The sealing devices 20A and 20B seal between the inner rings 12A and 12B and a housing (not shown). The inner ring 12A has a spiral groove 12Aa formed on the inner periphery thereof, and the inner ring 12B has a spiral groove 12Ba formed on the inner periphery thereof.
Is formed. The spiral grooves 12Aa and 12Ba are provided with a lubricant (for example, a solid lubricant impregnated with a lubricant) inside the spiral grooves 12Aa and 12Ba.
The space between 12B and a work roll (not shown) is lubricated. FIG. 3 is a perspective view of the inner race 12A. FIG.
, The inner ring 12A forms a convex portion 12Ab, which is obtained by cutting off an upper half of an end portion abutting against the inner ring 12B. On the other hand, the inner ring 12B has a protruding portion 12Bb formed by cutting off a lower half of a short cylinder at an end portion abutting against the inner ring 12A (see FIG. 2). The protruding portions 12Ab and 12Bb constituting the prohibiting portion have shapes and dimensions complementary to each other, and are closely adhered to each other without gaps when the inner rings 12A and 12B are assembled as shown in FIG. Next, the operation of this embodiment will be described. In FIG. 1, when a work roll (not shown) of a rolling mill rotates together with the inner rings 12A, 12B, the inner rings 12A, 1B are rotated.
2B and the outer ring 13A, 13B, 13C between the tapered roller 1
4A to 14D roll, whereby the work roll 1 can be rotatably supported on a housing (not shown). At this time, the protrusions 12 of the inner rings 12A and 12B
Since Ab and 12Bb prohibit relative rotation of the inner rings 12A and 12B, the butted end faces of the inner rings 12A and 12B are suppressed from being worn, and the axial width of the inner rings 12A and 12B is prevented from decreasing. Tapered rollers 14B, 14
An appropriate gap of C can be secured for a long time. As described above, the present invention has been described with reference to the embodiments. However, the present invention should not be construed as being limited to the above embodiments, and it is needless to say that the present invention can be appropriately changed and improved. is there. The end shape of the inner ring as the prohibition portion includes, in addition to the protrusions described in the embodiment, all shapes that can prohibit relative rotation between the inner rings, such as a combination of tapered surfaces and pin connection. Further, it goes without saying that the bearing device of the present invention is not limited to supporting the roll neck shaft of a rolling mill, but can be applied to other uses. According to the bearing device of the present invention, an inner ring that can be divided in the axial direction, an outer ring that can be divided in the axial direction, and a rolling arrangement between the inner ring and the outer ring are provided. Double row rolling elements, and the splittable inner ring is provided with a prohibiting portion for prohibiting relative rotation with respect to each other in a combined state, so that rubbing between the inner rings during operation can be suppressed. In addition, it is possible to prevent a decrease in the axial width of the inner ring, and to secure a proper gap between the rollers over a long period of time.

【図面の簡単な説明】 【図1】本発明の実施の形態にかかる軸受装置の断面図
である。 【図2】本発明の実施の形態にかかる軸受装置を分解し
た状態で示す断面図である。 【図3】内輪の斜視図である。 【符号の説明】 1 ワークロール 12A、12B 内輪 12Ab、12Bb 凸部 13A〜13C 外輪 14A〜14D 円錐ころ
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a bearing device according to an embodiment of the present invention. FIG. 2 is an exploded cross-sectional view of the bearing device according to the embodiment of the present invention. FIG. 3 is a perspective view of an inner race. [Description of Signs] 1 Work rolls 12A, 12B Inner rings 12Ab, 12Bb Convex portions 13A to 13C Outer rings 14A to 14D Tapered rollers

Claims (1)

【特許請求の範囲】 【請求項1】 軸線方向に分割可能な内輪と、 軸線方向に分割可能な外輪と、 前記内輪と前記外輪との間において転動自在に配置され
た複列の転動体と、を有し、 前記分割可能な内輪は、組み合わせた状態で互いに対し
て相対回転を禁止する禁止部を備えていることを特徴と
する軸受装置。
Claims 1. An inner ring that can be divided in an axial direction, an outer ring that can be divided in an axial direction, and a double row of rolling elements that are arranged to be rotatable between the inner ring and the outer ring. And wherein the splittable inner ring includes a prohibiting portion that prohibits relative rotation with respect to each other in a combined state.
JP2002118983A 2002-04-22 2002-04-22 Bearing device Pending JP2003314565A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002118983A JP2003314565A (en) 2002-04-22 2002-04-22 Bearing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002118983A JP2003314565A (en) 2002-04-22 2002-04-22 Bearing device

Publications (1)

Publication Number Publication Date
JP2003314565A true JP2003314565A (en) 2003-11-06

Family

ID=29535670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002118983A Pending JP2003314565A (en) 2002-04-22 2002-04-22 Bearing device

Country Status (1)

Country Link
JP (1) JP2003314565A (en)

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