JP2005069378A - Rolling bearing for molten metal plating line - Google Patents

Rolling bearing for molten metal plating line Download PDF

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JP2005069378A
JP2005069378A JP2003300387A JP2003300387A JP2005069378A JP 2005069378 A JP2005069378 A JP 2005069378A JP 2003300387 A JP2003300387 A JP 2003300387A JP 2003300387 A JP2003300387 A JP 2003300387A JP 2005069378 A JP2005069378 A JP 2005069378A
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molten metal
outer ring
metal plating
inner ring
rolling bearing
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Japanese (ja)
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Masao Ito
正夫 伊藤
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NSK Ltd
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NSK Ltd
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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
    • F16C33/46—Cages for rollers or needles
    • F16C33/56—Selection of substances
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4641—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together
    • F16C33/4647—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together made from metal, e.g. two cast parts joined by rivets
    • 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
    • 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
    • F16C2204/00—Metallic materials; Alloys
    • F16C2204/40—Alloys based on refractory metals
    • 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
    • F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements
    • 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
    • F16C33/34—Rollers; Needles
    • F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces

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  • 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 compact rolling bearing for a molten metal plating line capable of reducing the number of maintenance man-hour and to be used for even a part wherein a large load is applied. <P>SOLUTION: This rolling bearing 10 for a molten metal plating line is provided with an inner ring 11 having an inner ring raceway surface 12, an outer ring 12 having an outer ring raceway surface 14, a plurality of rolling bodies 15 arranged to relatively rotate between the inner and the outer ring raceway surfaces 12 and 14, and a holder 16 for rotatably holding the rolling bodies 15. This rolling bearing 10 is immersed in a molten metal plating vessel. The inner ring 11, the outer ring 13 and the rolling bodies 15 are made of silicon nitride, and the holder 16 is made of pure tantalum or a tantalum-tungsten alloy, and furthermore, the rolling body 15 is formed into a spherical roller. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、例えば長尺の鋼板の表面に連続的に溶融亜鉛等の溶融金属メッキ処理を施して亜鉛メッキ鋼板等を製造する溶融亜鉛メッキ浴中に設けられる溶融金属メッキライン用転がり軸受に関する。   The present invention relates to a rolling bearing for a molten metal plating line provided in a hot dip galvanizing bath for producing a galvanized steel sheet or the like by continuously subjecting a surface of a long steel sheet to a molten metal plating process such as molten zinc.

従来の溶融金属メッキライン用軸受には、窒化珪素（セラミックス）製のすべり軸受が多く用いられている（例えば、特許文献１参照）。   As a conventional molten metal plating line bearing, a silicon nitride (ceramics) sliding bearing is often used (for example, refer to Patent Document 1).

また、従来の溶融金属メッキライン用軸受の一例として図３に示される溶融金属メッキライン用転がり軸受５０は、窒化珪素により作成された外輪５１と内輪５２と複数の球体である玉５３とから構成されている。また、外輪５１を調心環５４の内側に嵌合支持している。外輪５１の外周面５１ａを球状凸面とし、調心環５４の内周面を球状凹面とすることにより、調心環５４の内側での外輪５１が揺動する。玉５３を保持する保持器５５は、１対の半片５６，５６、ボルト５７、ナット５８が、純タンタル、若しくはタンタルに１０重量％以下のタングステンを加えたタンタル−タングステン合金により作成されている（例えば、特許文献２参照）。
特許第２６３８３９７号公報 特許第２５７５５６８号公報（第２−４頁、第２図） Further, as an example of a conventional molten metal plating line bearing, a molten metal plating line rolling bearing 50 shown in FIG. 3 is composed of an outer ring 51, an inner ring 52 and balls 53 which are a plurality of spheres made of silicon nitride. Has been. Further, the outer ring 51 is fitted and supported inside the aligning ring 54. By making the outer peripheral surface 51a of the outer ring 51 into a spherical convex surface and making the inner peripheral surface of the aligning ring 54 into a spherical concave surface, the outer ring 51 inside the aligning ring 54 swings. The cage 55 for holding the ball 53 is made of a pair of halves 56, 56, a bolt 57, and a nut 58 made of pure tantalum or a tantalum-tungsten alloy in which 10 wt% or less of tungsten is added to tantalum ( For example, see Patent Document 2).
Japanese Patent No. 26389797 Japanese Patent No. 2575568 (page 2-4, Fig. 2)

ところが、上記特許文献１に開示された溶融金属メッキライン用軸受では、すべり軸受を用いているため、摩耗し易く、摩耗が生じると製造される亜鉛メッキ鋼板等へのメッキ膜厚が不均一になり、軽量化を追及している自動車用に不適当になる。そのため、このような溶融金属メッキライン用軸受は、通常、２週間程度使用の後での交換を余儀なくされるため、メンテナンス工数が増大する。   However, since the molten metal plating line bearing disclosed in Patent Document 1 uses a slide bearing, it is easy to wear, and when the wear occurs, the plating film thickness on the galvanized steel sheet and the like produced is uneven. It becomes unsuitable for automobiles that are pursuing weight reduction. For this reason, such a molten metal plating line bearing is usually forced to be replaced after being used for about two weeks, which increases the maintenance man-hours.

また、上記特許文献２に開示された溶融金属メッキライン用転がり軸受５０では、外輪５１の外周面５１ａが球状凸面とされ、調心環５４の内周面が球状凹面とされ、外輪５１を調心環５４の内側に嵌合支持することにより、調心環５４の内側での外輪５１が揺動するようにしている。そのため、外輪５１の外周側に配される調心環５４によって、全体の外径が大きくなり、この溶融金属メッキライン用転がり軸受５０を収容するスペースを多く必要として、省スペース化を図ることがし難い。更に、球体である玉５３を用いた玉軸受であるため、負荷荷重に制限があり、シンクロールのような大きな負荷荷重がかかる箇所に用いると製品精度に影響を及ぼす可能性も出てくる。   Further, in the rolling bearing 50 for a molten metal plating line disclosed in Patent Document 2, the outer peripheral surface 51a of the outer ring 51 is a spherical convex surface, the inner peripheral surface of the aligning ring 54 is a spherical concave surface, and the outer ring 51 is adjusted. By fitting and supporting the inner side of the center ring 54, the outer ring 51 on the inner side of the centering ring 54 swings. Therefore, the entire outer diameter is increased by the aligning ring 54 arranged on the outer peripheral side of the outer ring 51, and a large space for accommodating the rolling bearing 50 for the molten metal plating line is required, thereby saving space. It is hard to do. Furthermore, since it is a ball bearing using the ball | bowl 53 which is a spherical body, there is a restriction | limiting in a load load, and when it uses for a location where a big load load like a sink roll is applied, possibility of affecting a product precision also comes out.

本発明は、上記課題を解決するためになされたものであり、その目的は、メンテナンス工数を減少させることができるとともにコンパクトな外形であり且つ大きな負荷荷重の個所にも用いることができる溶融金属メッキライン用転がり軸受を提供することにある。   The present invention has been made in order to solve the above-mentioned problems, and its object is to provide a molten metal plating that can reduce maintenance man-hours, has a compact outer shape, and can be used even in places with a large load. It is to provide a rolling bearing for a line.

上記課題を解決する本発明の溶融金属メッキライン用転がり軸受は、内輪軌道面を有する内輪と、外輪軌道面を有する外輪と、前記内外輪軌道面間に相対回転自在に配された複数の転動体と、前記転動体を転動自在に保持する保持器と、を備え、溶融金属メッキ浴中に浸漬される溶融金属メッキライン用転がり軸受であって、前記内輪、前記外輪、および前記転動体が窒化珪素製であり、且つ前記保持器が純タンタル製、若しくはタンタル−タングステン合金製であり、更に前記転動体が、球面ころであることを特徴としている。   A rolling bearing for a molten metal plating line according to the present invention that solves the above-mentioned problems is provided with an inner ring having an inner ring raceway surface, an outer ring having an outer ring raceway surface, and a plurality of rolling bearings arranged in a relatively rotatable manner between the inner and outer ring raceway surfaces. A rolling bearing for a molten metal plating line that is immersed in a molten metal plating bath, the inner ring, the outer ring, and the rolling element. Is made of silicon nitride, the cage is made of pure tantalum or tantalum-tungsten alloy, and the rolling elements are spherical rollers.

上記構成の溶融金属メッキライン用転がり軸受によれば、窒化珪素製の内輪、外輪、および転動体と、純タンタル製若しくは、タンタル−タングステン合金製の保持器が用いられ、転動体として、球面ころが用いられる。したがって、窒化珪素製の内輪、外輪、転動体と、純タンタル製、若しくはタンタル−タングステン合金製の保持器とが、摩耗し難いため、軽量化を追及している自動車用鋼板のメッキに適用され、メンテナンス工数を減少させることができる。また、従来のもののような調心環を用いないので、全体の外径が大きくならず、収容スペースを小さくできるので、省スペース化を図ることができる。そして、転動体として球面ころが用いられるため、従来のもののような、別部品である調心環を用いることなく調心を行うことができるとともに、負荷荷重に対する制限が少なくなって、シンクロールのような大きな負荷荷重がかかる個所にも用いることができる。   According to the rolling bearing for a molten metal plating line having the above-described structure, an inner ring, an outer ring, and a rolling element made of silicon nitride, and a cage made of pure tantalum or a tantalum-tungsten alloy are used. Is used. Therefore, the inner ring, outer ring, and rolling element made of silicon nitride and the cage made of pure tantalum or tantalum-tungsten alloy are less likely to wear, and therefore are applied to the plating of automotive steel plates that are being pursued for weight reduction. Maintenance man-hours can be reduced. Further, since a centering ring as in the conventional one is not used, the overall outer diameter is not increased, and the accommodation space can be reduced, so that space saving can be achieved. Since spherical rollers are used as rolling elements, alignment can be performed without using a separate aligning ring such as a conventional one, and there is less restriction on the load load, and the sink roll It can also be used in places where such a large load is applied.

以上説明したように、本発明の溶融金属メッキライン用転がり軸受によれば、窒化珪素製の内輪、外輪、および転動体と、純タンタル製若しくは、タンタル−タングステン合金製の保持器が用いられ、転動体として球面ころが用いられるので、メンテナンス工数を減少させることができるとともにコンパクトな外形であり且つ大きな負荷荷重の個所にも用いることができる。   As described above, according to the rolling bearing for a molten metal plating line of the present invention, an inner ring, an outer ring, and a rolling element made of silicon nitride and a cage made of pure tantalum or a tantalum-tungsten alloy are used. Since spherical rollers are used as the rolling elements, the number of maintenance steps can be reduced, and the outer shape is compact and can be used at locations with a large load.

以下、本発明に係る溶融金属メッキライン用転がり軸受の第１実施形態を図１〜２に基づいて詳細に説明する。図１は本発明の第１実施形態である溶融金属メッキライン用転がり軸受（以下、溶融金属メッキライン用転がり軸受、又は単に転がり軸受と記述する。）を示す半断面図、図２（ａ）は図１に示す溶融金属メッキライン用転がり軸受に用いられる保持器の側面図、図２（ｂ）は図２（ａ）の縦断面図である。   Hereinafter, a first embodiment of a rolling bearing for a molten metal plating line according to the present invention will be described in detail with reference to FIGS. FIG. 1 is a half sectional view showing a rolling bearing for a molten metal plating line (hereinafter referred to as a rolling bearing for a molten metal plating line or simply a rolling bearing) according to the first embodiment of the present invention, and FIG. FIG. 2 is a side view of a cage used in the rolling bearing for a molten metal plating line shown in FIG. 1, and FIG. 2 (b) is a longitudinal sectional view of FIG. 2 (a).

図１に示すように、本実施形態の溶融金属メッキライン用転がり軸受１０は、外周面に内輪軌道面１２を有する内輪１１と、内周面に外輪軌道面１４を有する外輪１３と、内輪１１の内輪軌道面１２と外輪１３の外輪軌道面１４との間に複数配置された転動体である球面ころ１５と、球面ころ１５を転動自在に保持する環状の保持器１６と、一対の間座１７，１７と、を備えている。   As shown in FIG. 1, a rolling bearing 10 for a molten metal plating line according to this embodiment includes an inner ring 11 having an inner ring raceway surface 12 on an outer peripheral surface, an outer ring 13 having an outer ring raceway surface 14 on an inner peripheral surface, and an inner ring 11. Between a pair of spherical rollers 15 that are rolling elements arranged between the inner ring raceway surface 12 and the outer ring raceway surface 14 of the outer ring 13, an annular retainer 16 that holds the spherical rollers 15 in a rollable manner, and a pair of Seats 17 and 17.

内輪１１は、内輪外径面１８に内輪軌道面１２が配されている。内輪軌道面１２は、外輪軌道面１４の曲率と略同一の曲率で凹状の球面状に形成されている。内輪１１は、窒化珪素（Ｓｉ３Ｎ４）等のセラミックス製である。そのため、溶融亜鉛等の高温の溶融金属中に浸漬されても、浸食（或いは溶食）を生ずることがない。内輪１１は、メッキ装置（不図示）のシンクロール（不図示）やサポートロール（不図示）が内嵌される。   The inner ring 11 has an inner ring raceway surface 12 disposed on an inner ring outer diameter surface 18. The inner ring raceway surface 12 is formed in a concave spherical shape with substantially the same curvature as the curvature of the outer ring raceway surface 14. The inner ring 11 is made of a ceramic such as silicon nitride (Si3N4). Therefore, even if immersed in a high-temperature molten metal such as molten zinc, erosion (or corrosion) does not occur. The inner ring 11 is fitted with a sink roll (not shown) and a support roll (not shown) of a plating apparatus (not shown).

外輪１３は、外輪内径面１９に外輪軌道面１４が配されている。外輪軌道面１４は、曲率中心が軸受中心に一致する凹状の球面状に形成されている。外輪１３は、窒化珪素（Ｓｉ３Ｎ４）等のセラミックス製である。そのため、溶融亜鉛等の高温の溶融金属中に浸漬されても、浸食（或いは溶食）を生ずることがない。外輪１３は、メッキ装置の支持腕（不図示）内に内嵌される。   In the outer ring 13, an outer ring raceway surface 14 is disposed on an outer ring inner diameter surface 19. The outer ring raceway surface 14 is formed in a concave spherical shape whose center of curvature coincides with the bearing center. The outer ring 13 is made of ceramics such as silicon nitride (Si3N4). Therefore, even if immersed in a high-temperature molten metal such as molten zinc, erosion (or corrosion) does not occur. The outer ring 13 is fitted in a support arm (not shown) of the plating apparatus.

球面ころ１５は、内輪１１の内輪軌道面１２および外輪１３の外輪軌道面１４に対応した曲率の外径面をもつ樽形ころであるため、内輪軌道面１２と外輪軌道面１４との間で、球面対偶を介して相対回転自在に配され、且つ外輪１３に対して内輪１１を傾斜させるため軸方向に対して自ら傾斜自在に配されている。球面ころ１５も、内輪１１および外輪１３と同様に、窒化珪素（Ｓｉ３Ｎ４）等のセラミックス製である。そのため、溶融亜鉛等の高温の溶融金属中に浸漬されても、浸食（或いは溶食）を生ずることがない。   Since the spherical roller 15 is a barrel roller having an outer diameter surface with a curvature corresponding to the inner ring raceway surface 12 of the inner ring 11 and the outer ring raceway surface 14 of the outer ring 13, the spherical roller 15 is between the inner ring raceway surface 12 and the outer ring raceway surface 14. The inner ring 11 is tilted relative to the outer ring 13 so as to be rotatable relative to the axial direction in order to tilt the inner ring 11 relative to the outer ring 13. Similarly to the inner ring 11 and the outer ring 13, the spherical roller 15 is also made of ceramics such as silicon nitride (Si3N4). Therefore, even if immersed in a high-temperature molten metal such as molten zinc, erosion (or corrosion) does not occur.

保持器１６は、本体部２０と、側板部２１とから構成された円環形状の分割型保持器である。保持器１６は、側板部２１に形成されたボルト孔２２と、本体部２０の柱部２３に形成されたボルト孔２４とに挿通されたボルト２５にナット２６がねじ込まれることによって、本体部２０と側板部２１とが一体的に結合されている。そして、柱部２３と側板部２１との間に形成されたポケット２７内に球面ころ１５がそれぞれ挿入保持されている。保持器１６は、純タンタル（Ｃ／Ｃコンポジット、繊維の方向が径方向）製、若しくは、タンタル−タングステン合金（例えばタンタルにタングステンを１０％以下の範囲で含有した合金）製である。そのため、溶融亜鉛等の高温の溶融金属中に浸漬されても、浸食（或いは溶食）を生ずることがない。   The cage 16 is a ring-shaped split type cage composed of a main body portion 20 and a side plate portion 21. The retainer 16 has a main body portion 20 in which a nut 26 is screwed into a bolt 25 inserted into a bolt hole 22 formed in the side plate portion 21 and a bolt hole 24 formed in the pillar portion 23 of the main body portion 20. And the side plate portion 21 are integrally coupled. The spherical rollers 15 are inserted and held in pockets 27 formed between the column portion 23 and the side plate portion 21. The cage 16 is made of pure tantalum (C / C composite, fiber direction is radial) or a tantalum-tungsten alloy (for example, an alloy containing tungsten in a range of 10% or less in tantalum). Therefore, even if immersed in a high-temperature molten metal such as molten zinc, erosion (or corrosion) does not occur.

間座１７，１７は、内輪１１の内輪外径面１８よりも僅かに大きい内径をもち、保持器１６の内径よりもわずかに小さい外径をもつ円環部材である。間座１７，１７は、内輪１１の内輪軌道面１２の両側、つまり球面ころ１５の軸方向両側に配されて、内輪１１の内輪外径面１８に外嵌されている。そのため、間座１７，１７は、球面ころ１５の姿勢を整えて制御する機能をもつ。間座１７，１７は、保持器１６と同様に、純タンタル（Ｃ／Ｃコンポジット 繊維の方向が径方向）製、若しくは、タンタル−タングステン合金（例えばタンタルにタングステンを１０％以下の範囲で含有した合金）製である。そのため、溶融亜鉛等の高温の溶融金属中に浸漬されても、浸食（或いは溶食）を生ずることがない。   The spacers 17 and 17 are annular members having an inner diameter slightly larger than the inner ring outer diameter surface 18 of the inner ring 11 and having an outer diameter slightly smaller than the inner diameter of the cage 16. The spacers 17, 17 are disposed on both sides of the inner ring raceway surface 12 of the inner ring 11, that is, on both sides in the axial direction of the spherical roller 15, and are fitted on the inner ring outer diameter surface 18 of the inner ring 11. Therefore, the spacers 17 and 17 have a function of adjusting and controlling the posture of the spherical roller 15. The spacers 17 and 17 are made of pure tantalum (the direction of the C / C composite fiber is the radial direction), or a tantalum-tungsten alloy (for example, tantalum containing tungsten in a range of 10% or less, similarly to the cage 16. Alloy). Therefore, even if immersed in a high-temperature molten metal such as molten zinc, erosion (or corrosion) does not occur.

図２（ａ），（ｂ）に示すように、保持器１６は、ポケット２７が、本体部２０の柱部２３を介して周方向に複数配されている。柱部２３の両端部は、球面ころ１５の外径面に対応した凹曲面に形成されている。ボルト２５は、柱部２３毎に設けられることが望ましい。   As shown in FIGS. 2A and 2B, the retainer 16 has a plurality of pockets 27 arranged in the circumferential direction via the column part 23 of the main body part 20. Both end portions of the column portion 23 are formed in a concave curved surface corresponding to the outer diameter surface of the spherical roller 15. The bolt 25 is desirably provided for each column portion 23.

このような転がり軸受１０は、一対の支持腕(不図示)の先端部に一対で配置され、各外輪１３が支持腕に内嵌され、各内輪１１にシンクロール（サポートロール）が内嵌される。そして、例えば長尺な鋼板の表面に亜鉛メッキを施すのに用いる場合、アンコイラ（不図示）から送り出された帯状の鋼板（不図示）が、搬送ロール（不図示）により案内されつつ、連続炉（不図示）からスナウト（不図示）を通り、溶融亜鉛を貯溜したメッキ槽（不図示）に導き入れられる。シンクロール（不図示）により上方に方向転換され、このメッキ槽内を送られることにより、表面に溶融亜鉛を付着させた鋼板が、サポートロールによって反りの矯正及び通板の安定化を図られ、メッキ処理済の鋼板として、メッキ槽外に取り出される。このとき、球面ころ１５により、外輪１３に対して、保持器１６および内輪１１が軸方向への傾動を許容されるとともに、内輪１１に対して、保持器１６および外輪１３が軸方向への傾動を許容されるので、シンクロール（サポートロール）が鋼板に応じて調心されることにより、鋼板がスムースに搬送される。また、摩耗を生じることがないので、メッキ膜厚が均一になり、製品精度が向上する。   Such a rolling bearing 10 is disposed in a pair at the tip of a pair of support arms (not shown), each outer ring 13 is fitted into the support arm, and a sink roll (support roll) is fitted into each inner ring 11. The For example, when used for galvanizing the surface of a long steel plate, a continuous steel furnace is guided while a strip-shaped steel plate (not shown) fed from an uncoiler (not shown) is guided by a transport roll (not shown). It passes through a snout (not shown) from (not shown) and is introduced into a plating tank (not shown) in which molten zinc is stored. By turning upward by a sink roll (not shown) and being sent through the plating tank, the steel sheet with molten zinc attached to the surface can be warped and stabilized by a support roll, It is taken out of the plating tank as a plated steel plate. At this time, the cage 16 and the inner ring 11 are allowed to tilt in the axial direction with respect to the outer ring 13 by the spherical roller 15, and the cage 16 and the outer ring 13 are tilted in the axial direction with respect to the inner ring 11. Since the sink roll (support roll) is aligned according to the steel plate, the steel plate is smoothly conveyed. In addition, since no wear occurs, the plating film thickness becomes uniform, and the product accuracy is improved.

溶融金属メッキライン用転がり軸受１０によれば、窒化珪素製の内輪１１、外輪１３、および球面ころ１５と、純タンタル製、若しくはタンタル−タングステン合金製の保持器１６が用いられ、転動体として、球面ころ１５が用いられる。   According to the rolling bearing 10 for a molten metal plating line, an inner ring 11, an outer ring 13, and a spherical roller 15 made of silicon nitride and a cage 16 made of pure tantalum or tantalum-tungsten alloy are used. Spherical rollers 15 are used.

したがって、窒化珪素製の内輪１１、外輪１３、球面ころ１５と、純タンタル製、若しくは、タンタル−タングステン合金製の保持器１６とが、摩耗し難いため、軽量化を追及している自動車用鋼板のメッキに適用され、メンテナンス工数を減少させることができる。また、従来のもののような調心環を用いないので、全体の外径が大きくならず、収容スペースを小さくできるので、省スペース化を図ることができる。そして、転動体として球面ころ１５が用いられるため、従来のもののような、別部品である調心環を用いることなく調心を行うことができるとともに、負荷荷重に対する制限が少なくなって、シンクロールのような大きな負荷荷重がかかる個所にも用いることができる。   Therefore, since the inner ring 11, the outer ring 13, and the spherical roller 15 made of silicon nitride and the cage 16 made of pure tantalum or tantalum-tungsten alloy are not easily worn, the steel sheet for automobiles that is pursuing weight reduction is being sought. It can be applied to the plating of steel and can reduce maintenance man-hours. Further, since a centering ring as in the conventional one is not used, the overall outer diameter is not increased, and the accommodation space can be reduced, so that space saving can be achieved. Since the spherical roller 15 is used as the rolling element, alignment can be performed without using a separate aligning ring as in the conventional one, and the restriction on the load load is reduced, so that the sink roll It can also be used in places where a large load is applied.

次に、本発明に係る溶融金属メッキライン用転がり軸受の第２実施形態を図３に基づいて説明する。なお、第１実施形態と同一構成の部分の符号は同じ符号を付すことで詳細な説明は省略する。   Next, 2nd Embodiment of the rolling bearing for molten metal plating lines which concerns on this invention is described based on FIG. In addition, the detailed description is abbreviate | omitted by attaching | subjecting the code | symbol of the part of the same structure as 1st Embodiment to the same code | symbol.

図３に示すように、本実施形態の溶融金属メッキライン用転がり軸受３０は、外周面に内輪軌道面１２を有する内輪１１と、内周面に外輪軌道面１４を有する外輪１３と、内輪１１の内輪軌道面１２と外輪１３の外輪軌道面１４との間に複数配置された転動体である球面ころ１５と、球面ころ１５を転動自在に保持する環状の保持器１６と、内輪１１の両側端に一対のつば輪３１，３１と、を備えている。   As shown in FIG. 3, a rolling bearing 30 for a molten metal plating line of the present embodiment includes an inner ring 11 having an inner ring raceway surface 12 on an outer peripheral surface, an outer ring 13 having an outer ring raceway surface 14 on an inner peripheral surface, and an inner ring 11. Of the inner ring raceway surface 12 and the outer ring raceway surface 14 of the outer ring 13 are a plurality of rolling elements, a spherical roller 15, an annular cage 16 that holds the spherical roller 15 in a freely rolling manner, and an inner ring 11. A pair of collar rings 31, 31 are provided at both ends.

つば輪３１は、内輪１１と同じ窒化珪素（Ｓｉ３Ｎ４）等のセラミックス製、或いは保持器１６と同様の純タンタル製、若しくはタンタル−タングステン合金製であり、このつば輪外径面３２は保持器１６の内径よりもわずかに小さい外径をもつ円環部材である。このつば輪３１の内輪１１側には球面ころ１５の軸方向両側面を転動自在に保持する鉤部３３が設けられており、上述した間座と同様に球面ころ１５の姿勢を整える機能を持っている。   The collar ring 31 is made of the same ceramic as the inner ring 11, such as silicon nitride (Si 3 N 4), or is made of pure tantalum similar to the cage 16 or tantalum-tungsten alloy. An annular member having an outer diameter slightly smaller than the inner diameter of the ring member. On the inner ring 11 side of the collar ring 31, there are provided flange portions 33 for holding both side surfaces in the axial direction of the spherical roller 15 so as to be able to roll, and the function of adjusting the posture of the spherical roller 15 is provided in the same manner as the spacer described above. have.

したがって、内輪１１、外輪１３、球面ころ１５、保持器１６、およびつば輪３１とが摩耗し難いため、溶融金属メッキライン等に使用することができ、メンテナンス工数も減少させることができる。また、従来のもののような調心環を用いないので、収容スペースを小さくできるので、省スペース化を図ることができる。   Therefore, the inner ring 11, the outer ring 13, the spherical roller 15, the cage 16, and the collar ring 31 are not easily worn, and can be used for a molten metal plating line or the like, and the maintenance man-hours can be reduced. In addition, since a centering ring unlike the conventional one is not used, the accommodation space can be reduced, so that space saving can be achieved.

次に、本発明に係る溶融金属メッキライン用転がり軸受の第３実施形態を図４に基づいて説明する。なお、第１および第２実施形態と同一構成の部分の符号は同じ符号を付すことで詳細な説明は省略する。   Next, a third embodiment of the rolling bearing for a molten metal plating line according to the present invention will be described with reference to FIG. In addition, the detailed description is abbreviate | omitted by attaching | subjecting the code | symbol of the part same as 1st and 2nd embodiment, and the same code | symbol.

図４に示すように、本実施形態の溶融金属メッキライン用転がり軸受４０は、外周面に内輪軌道面１２を有する内輪４１と、内周面に外輪軌道面１４を有する外輪１３と、内輪４１の内輪軌道面１２と外輪１３の外輪軌道面１４との間に複数配置された転動体である球面ころ１５と、球面ころ１５を転動自在に保持する環状の保持器１６と、を備えている。
内輪４１は、外輪１３と同じ窒化珪素（Ｓｉ３Ｎ４）等のセラミックス製であり、この内輪外径面４２は保持器１６の内径よりもわずかに小さい外径をもち、球面ころ１５の軸方向両側面を転動自在に保持するつば部４３が設けられており、上述した間座と同様に球面ころ１５の姿勢を整える機能を持っている。 As shown in FIG. 4, a rolling bearing 40 for a molten metal plating line according to this embodiment includes an inner ring 41 having an inner ring raceway surface 12 on an outer peripheral surface, an outer ring 13 having an outer ring raceway surface 14 on an inner peripheral surface, and an inner ring 41. A spherical roller 15 which is a rolling element disposed between the inner ring raceway surface 12 and the outer ring raceway surface 14 of the outer ring 13, and an annular retainer 16 which holds the spherical roller 15 in a rollable manner. Yes.
The inner ring 41 is made of ceramics such as silicon nitride (Si3N4), which is the same as the outer ring 13, and the inner ring outer diameter surface 42 has an outer diameter slightly smaller than the inner diameter of the cage 16. Is provided so as to be able to roll freely, and has a function of adjusting the posture of the spherical roller 15 in the same manner as the spacer described above.

したがって、内輪４１、外輪１３、球面ころ１５および保持器１６とが摩耗し難いため、溶融金属メッキライン等に使用することができ、部品点数も少ないのでメンテナンス工数をより一層減少させることができる。また、従来のもののような調心環を用いないので、収容スペースを小さくできるので、省スペース化を図ることができる。   Accordingly, the inner ring 41, the outer ring 13, the spherical roller 15 and the cage 16 are not easily worn, and can be used for a molten metal plating line or the like. Since the number of parts is small, the number of maintenance steps can be further reduced. In addition, since a centering ring unlike the conventional one is not used, the accommodation space can be reduced, so that space saving can be achieved.

なお、本発明は上述した実施形態に限定されるものではなく、適宜、変形，改良，等が可能である。その他、前述した実施形態における各構成要素の材質，形状，寸法，形態，数，配置個所，等は本発明を達成できるものであれば任意であり、限定されない。例えば、保持器において、本体部と側板部とをボルトおよびナットで結合するのに代えて、リベット止めとしても良い。   In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, form, number, location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved. For example, in the cage, instead of connecting the main body portion and the side plate portion with bolts and nuts, riveting may be used.

本発明に係る溶融金属メッキライン用転がり軸受の第１実施形態を示す半断面図である。1 is a half sectional view showing a first embodiment of a rolling bearing for a molten metal plating line according to the present invention. （ａ）は図１に示した溶融金属メッキライン用転がり軸受に用いられる保持器の側面図、（ｂ）は（ａ）の縦断面図である。(A) is a side view of a cage used in the rolling bearing for a molten metal plating line shown in FIG. 1, and (b) is a longitudinal sectional view of (a). 本発明に係る溶融金属メッキライン用転がり軸受の第２実施形態を示す半断面図である。It is a half sectional view showing a 2nd embodiment of a rolling bearing for hot metal plating lines concerning the present invention. 本発明に係る溶融金属メッキライン用転がり軸受の第３実施形態を示す半断面図である。FIG. 6 is a half sectional view showing a third embodiment of a rolling bearing for a molten metal plating line according to the present invention. 従来の溶融金属メッキライン用転がり軸受の断面図である。It is sectional drawing of the conventional rolling bearing for molten metal plating lines.

符号の説明Explanation of symbols

１０，３０，４０ 溶融金属メッキライン用転がり軸受
１１ 内輪
１２ 内輪軌道面
１３ 外輪
１４ 外輪軌道面
１５ 球面ころ（転動体）
１６ 保持器
３１ つば輪
３３ 鉤部
４１ 内輪
４３ つば部 10, 30, 40 Rolling bearing for molten metal plating line 11 Inner ring 12 Inner ring raceway surface 13 Outer ring 14 Outer ring raceway surface 15 Spherical roller (rolling element)
16 Cage 31 collar ring 33 collar part 41 inner ring 43 collar part

Claims (1)

内輪軌道面を有する内輪と、外輪軌道面を有する外輪と、前記内外輪軌道面間に相対回転自在に配された複数の転動体と、前記転動体を転動自在に保持する保持器と、を備え、溶融金属メッキ浴中に浸漬される溶融金属メッキライン用転がり軸受であって、
前記内輪、前記外輪、および前記転動体が窒化珪素製であり、且つ前記保持器が純タンタル製、若しくはタンタル−タングステン合金製であり、更に前記転動体が球面ころであることを特徴とする溶融金属メッキライン用転がり軸受。 An inner ring having an inner ring raceway surface, an outer ring having an outer ring raceway surface, a plurality of rolling elements arranged in a relatively rotatable manner between the inner and outer ring raceway surfaces, and a cage for holding the rolling elements in a rotatable manner. A rolling bearing for a molten metal plating line immersed in a molten metal plating bath,
The inner ring, the outer ring, and the rolling element are made of silicon nitride, the cage is made of pure tantalum or a tantalum-tungsten alloy, and the rolling element is a spherical roller. Rolling bearing for metal plating line.
JP2003300387A 2003-08-25 2003-08-25 Rolling bearing for molten metal plating line Pending JP2005069378A (en)

Priority Applications (1)

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JP2003300387A JP2005069378A (en) 2003-08-25 2003-08-25 Rolling bearing for molten metal plating line

Publications (1)

Publication Number Publication Date
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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009222139A (en) * 2008-03-17 2009-10-01 Nsk Ltd Rolling bearing and rolling bearing with alignment ring
WO2011140230A1 (en) * 2010-05-05 2011-11-10 Rexnord Industries, Llc Lightweight hybrid bearing assembly and a method of making thereof
JP2015514949A (en) * 2012-04-23 2015-05-21 アクティエボラゲット・エスコーエッフ Toroidal roller bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009222139A (en) * 2008-03-17 2009-10-01 Nsk Ltd Rolling bearing and rolling bearing with alignment ring
WO2011140230A1 (en) * 2010-05-05 2011-11-10 Rexnord Industries, Llc Lightweight hybrid bearing assembly and a method of making thereof
CN103026081A (en) * 2010-05-05 2013-04-03 莱克斯诺工业有限公司 Lightweight hybrid bearing assembly and a method of making thereof
JP2015514949A (en) * 2012-04-23 2015-05-21 アクティエボラゲット・エスコーエッフ Toroidal roller bearing

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