JP3966442B2 - Rolling mill bearings - Google Patents

Rolling mill bearings Download PDF

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Publication number
JP3966442B2
JP3966442B2 JP2000336897A JP2000336897A JP3966442B2 JP 3966442 B2 JP3966442 B2 JP 3966442B2 JP 2000336897 A JP2000336897 A JP 2000336897A JP 2000336897 A JP2000336897 A JP 2000336897A JP 3966442 B2 JP3966442 B2 JP 3966442B2
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Prior art keywords
rings
disposed
peripheral surface
ring
rolling mill
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JP2002139053A5 (en
JP2002139053A (en
Inventor
浩治 川島
克彦 加藤
和也 藤本
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JFE Steel Corp
JTEKT Corp
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JFE Steel Corp
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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/388—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with four rows, i.e. four row tapered roller bearings
    • 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
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6622—Details of supply and/or removal of the grease, e.g. purging grease
    • 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
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/12—Rolling apparatus, e.g. rolling stands, rolls

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

Description

【０００１】
【発明の属する技術分野】
この発明は、圧延機のロールネック支持用として使用される圧延機用軸受、特に、ハウジングが薄肉であっても給脂用のニップルを取り付けて給脂することのできる圧延機用軸受に関する。
【０００２】
【従来の技術】
圧延機に使用されるロールは、両端部を支持するため軸受が使用される。この軸受は、ハウジング内に設置されて、圧延機用ロールのロールネック部を支持する。例えば、図３に示すように、ハウジング（チョックともいう）Ｈ内に、外輪２１，２１と、内輪２２，２２と、円錐ころ２３，保持器２４等より成る軸受２０を配置し、内輪２２，２２の内周面にロールネック（図示省略）を嵌め入れて支持する構成としてある。
【０００３】
上記する圧延機用の軸受２０は、使用する環境が粉塵が多く且つ比較的高温下で使用され、冷却用の水も多量に使用されるので水分の侵入やダストの侵入を防ぐため、シール保持環２７を軸受端部に配置すると共に、該シール保持環２７と、内輪２２を外側に長くした延長部２２ｂとの間にシール２８を配置してある。そして、軸受２０を潤滑するため、前記チョックＨの側面からＬ字型に潤滑用通路２９が穿設され、ここからグリースが注入される。更に、前記軸受２０には、外輪２１と外輪２１との間に、グリース供給孔２５ａを設けた外輪間座２５を配置して、前記潤滑用通路２９から給脂したグリースが軸受２０内に充分行き渡るようにしてある。圧延機使用中は、前記ハウジングＨの潤滑用通路２９は、栓で封止し、潤滑用グリース注入時には、グリースニップル１２を使用する。
【０００４】
また、ロールネック支持用の軸受としては、図４に示すように、ハウジング（チョック）Ｈに、外輪３１，３１と、内輪３２，と、ころ３３，３３とより成る軸受３０を配置すると共に、外輪３１と外輪３１との間に、外輪間座３５を配置し、ハウジング（チョック）Ｈの側面及び外周面のいずれからも給脂できるＴ字型の潤滑用通路３８、３９を穿設したものも使用される。この場合、前記ハウジング（チョック）Ｈの内周面には各外輪３１，３１へグリースが行き渡るようにするため、横方向に凹溝３４が設けてある（特公昭５６−３８８０４号）。
【０００５】
【発明が解決使用とする課題】
上記するように、通常、ロールネック支持用軸受においては、ハウジングＨにＬ字型の給脂用穴（２９）やＴ字型の給脂用穴（３８，３９）が穿設されるので、加工が複雑である。また、軸受にグリースを給脂する場合、外輪間座（２５、３５等）から給脂するが、この給脂作業は、圧延機用ロールを再研磨する等のメインテナンスの際、チョックからロールを外し、チョック端面や外周面に取り付けたグリースニップルを装着して行われる。
しかしながら、チョックの肉厚が薄い場合や、ロール配置の構成上、給脂用の穴を開けられない場合があり、給脂が極めて不便な場合があった。
【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、肉厚の薄いチョックに、給脂用のＬ字型やＴ字型の横穴を穿設したり、外輪間座に給脂用孔を穿設することなく、メインテナンス時等に容易に給脂することのできる圧延機用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の手段として、請求項１に記載の発明は、ハウジングへ嵌め入れる複数の外輪と、内周面にロールネックを嵌め入れる複数の内輪と、これら外、内輪間に配置する転動体と、前記転動体を保持する保持器と、前記外輪間に配置する外輪間座と、前記内輪間に配置する内輪間座と、で構成され、且つ、前記内輪両端部を軸方向外側へ延設した外側環状部と前記外輪外側に隣接配置したシール保持環との間に密封用シールを配置して成る圧延機用軸受において、
前記内輪内周面に、周方向の円弧状の凹部を形成すると共に、該凹部に軸受空間に通じる潤滑用孔を穿設し、該潤滑用孔の内周面側にロールネックと接触しないようグリースニップルを設けたことを特徴としている。
【０００８】
また、請求項２に記載の発明は、ハウジングへ嵌め入れる複数の外輪と、内周面にロールネックを嵌め入れる複数の内輪と、これら外、内輪間に配置する転動体と、前記転動体を保持する保持器と、前記外輪間に配置する外輪間座と、前記内輪間に配置する内輪間座と、で構成され、且つ、前記内輪両端部を軸方向外側へ延設した外側環状部と前記外輪外側に隣接配置したシール保持環との間に密封用シールを配置して成る圧延機用軸受において、
前記内輪間座内周面に、周方向の円弧状の凹部を形成すると共に、該凹部に軸受空間に通じる潤滑用孔を穿設し、該潤滑用孔の内周面側にロールネックと接触しないようグリースニップルを設けたことを特徴としている。
【０００９】
【発明の実施の形態】
以下、この発明の具体的実施の形態について図面を参照しながら説明する。
図１は、この発明の圧延機用軸受の一部縦断面図であり、図２は、図１のＡーＡ矢視断面図である。
この圧延機用軸受１０は、外輪１と、内輪２と、転動体の円錐ころ３と、前記円錐ころ３を保持する保持器４と、外輪間座５と、内輪間座６と、シール８と、このシール８を保持するシール保持環７，７と、で構成される。そして、前記外輪１は、複列の円錐ころ３，３を配置する複列外輪１ａと、単列の円錐ころ３を配置する外輪１ｂ，１ｂとで構成され、前記内輪２は、複列の円錐ころ３，３を配置する内輪２ａ，２ａで構成される。前記外輪間座５，５は、外輪１ａと、左右の外輪１ｂ，１ｂとの間に配置され、前記内輪間座６は、内輪２ａと内輪２ａとの間に配置されるが、該内輪間座６には、シール用のＯリングが嵌められている。
【００１０】
また、前記内輪２ａ，２ａには、それぞれ外側に外側環状部２ｂ，２ｂが、延長して形成されている。そして、これらの外側環状部２ｂ，２ｂと、前記シール保持環７，７との間に、シール８，８が配置される。これら外輪１ａ，１ｂ，１ｂ及びシール保持環７，７は、図示しないハウジング（チョック）に配置され、前記内輪２ａ，２ａの内周面には、図示しない圧延ロールのロールネックが嵌め込まれる。また、前記シール保持環７、７の外周には、凹溝を設けてここにＯリング９，９が嵌められハウジングとの間をシールするようになっている。
【００１１】
次に、前記内輪２ａ，２ａの内周面には、図２に示すように、周方向の円弧状の凹部２ｃが形成されると共に、潤滑油給脂用孔２ｄが穿設してある。該潤滑用孔２ｄは、内輪２ａと、外輪間座５との間の軸受空間１１に通じるように穿設され、内側（内輪内側）には雌ねじが設けてある。この場合、凹部２ｃは、通常、エンドミルにより加工して形成される。そして該潤滑用孔２ｄには、内側からグリースニップル１２がねじ止めされているが、この場合、前記潤滑孔２ｄは、前記グリースニップル１２の頭部が、図示しないロールネックの表面に当接しないように設ける必要がある。
【００１２】
こうして、圧延ロールを交換したり、メインテナンス時にロールを外し、軸受を点検すると共に、内輪２ａの内側の凹部２ｃのグリースニップル１２に、ホースをつないで潤滑用のグリースを充填する。この場合、ハウジング等には、潤滑用の孔等を穿設する必要もないので加工コストも低減することができる。
【００１３】
尚、上記実施の形態においては、内輪２ａの内周面に設ける凹部２ｃ（および潤滑油給脂用孔２ｄ）は、一つの内輪２ａに複数箇所設けても良い。また、この発明の実施の形態では、軸受の転動体を円錐ころ３として説明したが、通常の円筒ころであっても良い。更に、上記実施の形態においては、内輪２ａの内周面に凹部２ｃを設けると共に、該凹部２ｃに潤滑油給脂用孔２ｄを設けたが、内輪２ａの代わりに、内輪間座６の内周面にも、周方向の円弧状の凹部２ｃ及び潤滑油給脂用孔２ｄを設けても良い。
【００１４】
【発明の効果】
以上、詳述したように、この発明の圧延機用軸受によれば、ハウジングの肉厚が薄くても、チョックにＬ字型やＴ字型の横穴を穿設したり、外輪間座に給脂用孔を穿設する必要がなくなり、加工コストも低減することができる。また、メインテナンスも楽になり、軸受やロールのメインテナンス時等に容易に給脂することができる。更に、肉厚の薄いハウジングであっても、給脂用の穴を穿設する必要がないのでハウジングの強度の心配をする必要が無くなる。
【図面の簡単な説明】
【図１】 この発明の圧延機用軸受の一部縦断面図である。
【図２】 図１のＡーＡ矢視断面図である。
【図３】 従来の圧延機用軸受の一部縦断面図である。
【図４】 従来の圧延機用軸受の一部縦断面図である。
【符号の説明】
１ 外輪
２ 内輪
２ｃ 凹部
２ｄ 潤滑用孔
３ 円錐ころ
４ 保持器
５ 外輪間座
６ 内輪間座
７ シール保持環
８ シール
９ Ｏリング
１０ 軸受
１１ 軸受空間
１２ グリースニップル[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rolling mill bearing used for supporting a roll neck of a rolling mill, and more particularly to a rolling mill bearing that can be lubricated by attaching a nipple for greasing even if the housing is thin.
[0002]
[Prior art]
Rollers used in rolling mills use bearings to support both ends. This bearing is installed in a housing and supports the roll neck part of the roll for rolling mills. For example, as shown in FIG. 3, a bearing 20 including outer rings 21 and 21, inner rings 22 and 22, tapered rollers 23, a cage 24, and the like is disposed in a housing (also referred to as a chock) H. In this configuration, a roll neck (not shown) is fitted and supported on the inner peripheral surface of 22.
[0003]
The rolling mill bearing 20 described above is used in a dusty environment and is used at a relatively high temperature, and a large amount of cooling water is used. with placing the ring 27 to the bearing end, with the seal holding ring 27, is arranged a seal 28 between the extension portion 22b that lengthen the inner ring 22 on the outside. In order to lubricate the bearing 20, a lubrication passage 29 is formed in an L shape from the side surface of the chock H, and grease is injected therefrom. Further, the bearing 20 is provided with an outer ring spacer 25 provided with a grease supply hole 25a between the outer ring 21 and the outer ring 21, and the grease supplied from the lubricating passage 29 is sufficiently contained in the bearing 20. I try to get around. During use of the rolling mill, the lubricating passage 29 of the housing H is sealed with a stopper, and the grease nipple 12 is used when lubricating grease is injected.
[0004]
As shown in FIG. 4, as a roll neck support bearing, a housing (chock) H is provided with a bearing 30 composed of outer rings 31, 31, inner rings 32, and rollers 33, 33. An outer ring spacer 35 is disposed between the outer ring 31 and the outer ring 31, and T-shaped lubrication passages 38 and 39 that can be lubricated from both the side surface and the outer peripheral surface of the housing (chock) H are provided. Also used. In this case, a concave groove 34 is provided in the lateral direction on the inner peripheral surface of the housing (chock) H to allow the grease to spread to the outer rings 31, 31 (Japanese Patent Publication No. 56-38804).
[0005]
[Problems to be Solved by the Invention]
As described above, in the roll neck support bearing, since the L-shaped greasing hole (29) and the T-shaped greasing hole (38, 39) are usually formed in the housing H, Processing is complicated. In addition, when grease is applied to the bearing, grease is supplied from the outer ring spacer (25, 35, etc.). In this greasing operation, the roll is removed from the chock during maintenance such as re-grinding the roll for a rolling mill. This is done by removing the grease nipple attached to the chock end face and outer peripheral face.
However, there are cases where the thickness of the chock is thin or the hole for greasing cannot be made due to the configuration of the roll arrangement, and the greasing is extremely inconvenient.
[0006]
The present invention has been made in order to cope with the above-described problems. An L-shaped or T-shaped lateral hole for lubrication is drilled in a thin chock or the outer ring spacer is lubricated. It is an object of the present invention to provide a rolling mill bearing that can be easily lubricated without maintenance holes.
[0007]
[Means for Solving the Problems]
That is, the present invention provides, as means for solving the above-described problems, the invention described in claim 1 includes a plurality of outer rings fitted into the housing, a plurality of inner rings fitted with a roll neck on the inner peripheral surface, A rolling element disposed between the outer and inner rings, a cage for holding the rolling element, an outer ring spacer disposed between the outer rings, and an inner ring spacer disposed between the inner rings, and In a rolling mill bearing comprising a sealing seal disposed between an outer annular portion having both ends of the inner ring extending outward in the axial direction and a seal holding ring disposed adjacent to the outer side of the outer ring,
A circular arc-shaped concave portion in the circumferential direction is formed on the inner peripheral surface of the inner ring, and a lubricating hole leading to the bearing space is formed in the concave portion so as not to contact the roll neck on the inner peripheral surface side of the lubricating hole. A grease nipple is provided.
[0008]
The invention according to claim 2 includes a plurality of outer rings fitted into the housing, a plurality of inner rings fitted with a roll neck on the inner peripheral surface, a rolling element disposed between the outer and inner rings, and the rolling element. An outer annular portion configured by a retainer, an outer ring spacer disposed between the outer rings, and an inner ring spacer disposed between the inner rings, and having both ends of the inner ring extending outward in the axial direction; In a rolling mill bearing comprising a sealing seal disposed between a seal holding ring disposed adjacent to the outer side of the outer ring,
A circular arc-shaped recess in the circumferential direction is formed on the inner peripheral surface of the inner ring spacer, and a hole for lubrication leading to the bearing space is formed in the recess, and the roll neck is brought into contact with the inner peripheral surface of the lubrication hole. It is characterized by the provision of a grease nipple to prevent this.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partial longitudinal cross-sectional view of a rolling mill bearing according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG.
The rolling mill bearing 10 includes an outer ring 1, an inner ring 2, a tapered roller 3 as a rolling element, a cage 4 that holds the tapered roller 3, an outer ring spacer 5, an inner ring spacer 6, and a seal 8. And seal holding rings 7 and 7 for holding the seal 8. Then, the outer ring 1 is constituted by a double row outer ring 1a of placing the tapered rollers 3,3 double row outer ring 1b of placing the tapered rollers 3 in a single column, and 1b, the inner ring 2, the double row It comprises inner rings 2a, 2a in which tapered rollers 3, 3 are arranged. The outer ring spacers 5 and 5 are arranged between the outer ring 1a and the left and right outer rings 1b and 1b, and the inner ring spacer 6 is arranged between the inner ring 2a and the inner ring 2a. An O-ring for sealing is fitted on the seat 6.
[0010]
The inner rings 2a and 2a are formed with outer annular portions 2b and 2b extending outside, respectively. Seals 8 and 8 are disposed between the outer annular portions 2b and 2b and the seal holding rings 7 and 7, respectively. The outer rings 1a, 1b, 1b and the seal holding rings 7, 7 are arranged in a housing (chock) (not shown), and a roll neck of a rolling roll (not shown) is fitted on the inner peripheral surface of the inner rings 2a, 2a. Further, a concave groove is provided on the outer periphery of the seal holding rings 7 and 7, and O-rings 9 and 9 are fitted therein to seal between the housings.
[0011]
Then, the inner ring 2a, the inner peripheral surface of 2a, as shown in FIG. 2, with the circumferential direction of the arc-shaped recess 2c is formed, the lubricating oil lubrication hole 2d is are drilled. The lubrication hole 2d is formed so as to communicate with the bearing space 11 between the inner ring 2a and the outer ring spacer 5, and an internal thread is provided on the inner side (inner ring inner side). In this case, the recess 2c is usually formed by processing with an end mill. The grease nipple 12 is screwed into the lubricating hole 2d from the inside. In this case, the head of the grease nipple 12 does not contact the surface of the roll neck (not shown). It is necessary to provide as follows.
[0012]
In this way, the rolling roll is replaced or removed during maintenance, the bearing is inspected, and the grease nipple 12 in the recess 2c inside the inner ring 2a is connected to a hose and filled with lubricating grease. In this case, since it is not necessary to make a hole or the like for lubrication in the housing or the like, the processing cost can be reduced.
[0013]
In the above-described embodiment, the recess 2c (and the lubricating oil supply hole 2d) provided on the inner peripheral surface of the inner ring 2a may be provided at a plurality of locations in one inner ring 2a. In the embodiment of the present invention, the rolling element of the bearing has been described as the tapered roller 3, but a normal cylindrical roller may be used. Further , in the above embodiment, the recess 2c is provided on the inner peripheral surface of the inner ring 2a, and the lubricating oil supply hole 2d is provided in the recess 2c. However, instead of the inner ring 2a, an inner ring spacer 6 is provided. A circumferential arc-shaped recess 2c and a lubricating oil supply hole 2d may also be provided on the peripheral surface.
[0014]
【The invention's effect】
As described above in detail, according to the rolling mill bearing of the present invention, even if the housing is thin, an L-shaped or T-shaped lateral hole is drilled in the chock or the outer ring spacer is fed. There is no need to make a hole for fat, and the processing cost can be reduced. In addition, maintenance is facilitated, and grease can be easily supplied during maintenance of the bearings and rolls. Furthermore, even in a thin housing, it is not necessary to make a hole for greasing, so there is no need to worry about the strength of the housing.
[Brief description of the drawings]
FIG. 1 is a partial longitudinal sectional view of a rolling mill bearing according to the present invention.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is a partial longitudinal sectional view of a conventional rolling mill bearing.
FIG. 4 is a partial longitudinal sectional view of a conventional rolling mill bearing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 2c Recessed part 2d Lubrication hole 3 Tapered roller 4 Cage 5 Outer ring spacer 6 Inner ring spacer 7 Seal retaining ring 8 Seal 9 O-ring 10 Bearing 11 Bearing space 12 Grease nipple

Claims (2)

ハウジングへ嵌め入れる複数の外輪と、内周面にロールネックを嵌め入れる複数の内輪と、これら外、内輪間に配置する転動体と、前記転動体を保持する保持器と、前記外輪間に配置する外輪間座と、前記内輪間に配置する内輪間座と、で構成され、且つ、前記内輪両端部を軸方向外側へ延設した外側環状部と前記外輪外側に隣接配置したシール保持環との間に密封用シールを配置して成る圧延機用軸受において、
前記内輪内周面に、周方向の円弧状の凹部を形成すると共に、該凹部に軸受空間に通じる潤滑用孔を穿設し、該潤滑用孔の内周面側にロールネックと接触しないようグリースニップルを設けたことを特徴とする圧延機用軸受。A plurality of outer rings that are fitted into the housing, a plurality of inner rings that are fitted with a roll neck on the inner peripheral surface, a rolling element that is disposed between these outer and inner rings, a cage that holds the rolling element, and a gap that is disposed between the outer rings An outer ring spacer, an inner ring spacer disposed between the inner rings, and an outer annular portion in which both ends of the inner ring extend outward in the axial direction, and a seal retaining ring disposed adjacent to the outer side of the outer ring. In a rolling mill bearing in which a sealing seal is disposed between
A circular arc-shaped concave portion in the circumferential direction is formed on the inner peripheral surface of the inner ring, and a lubricating hole leading to the bearing space is formed in the concave portion so as not to contact the roll neck on the inner peripheral surface side of the lubricating hole. A rolling mill bearing characterized by a grease nipple. ハウジングへ嵌め入れる複数の外輪と、内周面にロールネックを嵌め入れる複数の内輪と、これら外、内輪間に配置する転動体と、前記転動体を保持する保持器と、前記外輪間に配置する外輪間座と、前記内輪間に配置する内輪間座と、で構成され、且つ、前記内輪両端部を軸方向外側へ延設した外側環状部と前記外輪外側に隣接配置したシール保持環との間に密封用シールを配置して成る圧延機用軸受において、
前記内輪間座内周面に、周方向の円弧状の凹部を形成すると共に、該凹部に軸受空間に通じる潤滑用孔を穿設し、該潤滑用孔の内周面側にロールネックと接触しないようグリースニップルを設けたことを特徴とする圧延機用軸受。 A plurality of outer rings that are fitted into the housing, a plurality of inner rings that are fitted with a roll neck on the inner peripheral surface, a rolling element that is disposed between these outer and inner rings, a cage that holds the rolling element, and a gap that is disposed between the outer rings An outer ring spacer, an inner ring spacer disposed between the inner rings, and an outer annular portion in which both ends of the inner ring extend outward in the axial direction, and a seal retaining ring disposed adjacent to the outer side of the outer ring. In a rolling mill bearing in which a sealing seal is disposed between
A circular arc-shaped recess in the circumferential direction is formed on the inner peripheral surface of the inner ring spacer, and a hole for lubrication leading to the bearing space is formed in the recess, and the roll neck is brought into contact with the inner peripheral surface of the lubrication hole. A rolling mill bearing characterized by providing a grease nipple so as not to occur.
JP2000336897A 2000-11-06 2000-11-06 Rolling mill bearings Expired - Lifetime JP3966442B2 (en)

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