JP5343456B2 - Roller bearing device and backup roll - Google Patents

Roller bearing device and backup roll Download PDF

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Publication number
JP5343456B2
JP5343456B2 JP2008223525A JP2008223525A JP5343456B2 JP 5343456 B2 JP5343456 B2 JP 5343456B2 JP 2008223525 A JP2008223525 A JP 2008223525A JP 2008223525 A JP2008223525 A JP 2008223525A JP 5343456 B2 JP5343456 B2 JP 5343456B2
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peripheral surface
female screw
bearing device
roller bearing
axial direction
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JP2010059989A (en
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晋也 松田
信行 石橋
道郎 ▲濱▼ノ上
武司 寺本
信人 酒井
護 浅井
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JTEKT Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller bearing device superior in both the performance of loading an axial load and in inhibiting foreign substances, including cooling water from infiltrating a roller arrangement chamber. <P>SOLUTION: The roller bearing device includes a second sealing device between one end of the axial direction of a shaft member 2 and one end of the axial direction of an outer cylindrical member 1. The second sealing device has a sealing member 78, fixed on the outer cylindrical member 1 and a female threaded member 79. The female threaded member 79 has female threads 55, screwed with male threads 53 of the shaft member 2 and the outside circumferential surface of a slinger 43, which is a sliding surface on which the sealing member 78 slides. An O-ring 80 is arranged between a part at an outer position in the axial direction from the female threads 55 on the inside circumferential surface of the female threaded member 79 and the outside circumferential surface of the shaft member 2. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、ころ軸受装置およびバックアップロールに関する。   The present invention relates to a roller bearing device and a backup roll.

従来、ころ軸受装置としては、実開平5−028504号公報(特許文献1)に記載されているものがある。   Conventionally, as a roller bearing device, there is one described in Japanese Utility Model Laid-Open No. 5-028504 (Patent Document 1).

このころ軸受装置は、筒部材、軸部材、ころ、密封装置、シールリング、止め輪および止め輪カバーを備え、上記ころは、上記筒部材と上記軸部材との間に配置されている。   The roller bearing device includes a tubular member, a shaft member, a roller, a sealing device, a seal ring, a retaining ring, and a retaining ring cover, and the roller is disposed between the tubular member and the shaft member.

上記シールリングは、上記軸部材の外周面に隙間嵌めされ、上記ころの端面に摺接する第1端面(鍔面)を有する。上記密封装置は、上記筒部材の軸方向の一端部と上記シールリングの外周面との間を密封している。   The seal ring has a first end surface (a flange surface) that is fitted into the outer peripheral surface of the shaft member and is in sliding contact with the end surface of the roller. The sealing device seals between the axial end of the cylindrical member and the outer peripheral surface of the seal ring.

上記止め輪は、上記軸部材の外周面に形成された凹部に嵌入されている。上記止め輪の一方の端面は、上記シールリングの軸方向の上記第1端面とは反対側の第2端面に当接している。上記止め輪は、シールリングを介してころからのアキシアル荷重を負荷するようになっている。   The retaining ring is fitted into a recess formed on the outer peripheral surface of the shaft member. One end surface of the retaining ring is in contact with a second end surface opposite to the first end surface in the axial direction of the seal ring. The retaining ring applies an axial load from the rollers via a seal ring.

上記止め輪カバーは、環状部材で、止め輪の軸方向の外方に位置している。上記止め輪カバーの径方向の内方の端部は、軸部材の外周面に固定され、止め輪カバーの径方向の外方の端部は、密封装置に摺接している。   The retaining ring cover is an annular member and is located outward in the axial direction of the retaining ring. The inner end portion in the radial direction of the retaining ring cover is fixed to the outer peripheral surface of the shaft member, and the outer end portion in the radial direction of the retaining ring cover is in sliding contact with the sealing device.

上記密封装置と上記止め輪カバーとで、上記止め輪よりも軸方向の外方において、筒部材と軸部材との間の開口を密封して、止め輪を冷却水等から保護して、止め輪の腐食およびその腐食に起因する止め輪の軸部材からの外れを防止している。   The sealing device and the retaining ring cover seal the opening between the cylindrical member and the shaft member outside the retaining ring in the axial direction so as to protect the retaining ring from cooling water and the like. The ring is corroded and the retaining ring is prevented from coming off the shaft member due to the corrosion.

上記シールリングは、その内周面に凹部を有している。上記シールリングの凹部にOリングを嵌入して、上記シールリングの内周面と、軸部材の外周面との間を、Oリングで密封して、冷却水が、外部からシールリングの内周面の内側を通過して軸受内に浸入することを確実に防止している。   The said seal ring has a recessed part in the internal peripheral surface. An O-ring is inserted into the recess of the seal ring, the space between the inner peripheral surface of the seal ring and the outer peripheral surface of the shaft member is sealed with an O-ring, and cooling water is supplied from the outside to the inner periphery of the seal ring. It reliably prevents passing through the inside of the surface and entering the bearing.

上記従来のころ軸受装置は、上記密封装置と上記止め輪カバーとで、冷却水が止め輪に接触することを抑制できるから、止め輪の腐食および止め輪の軸部材からの外れを抑制できるという利点を有する。   In the conventional roller bearing device, the sealing device and the retaining ring cover can suppress the cooling water from contacting the retaining ring, so that the retaining ring can be prevented from corroding and coming off from the shaft member of the retaining ring. Have advantages.

しかしながら、止め輪カバーで、止め輪を保護したとしても、止め輪の腐食を完全には保護できず、止め輪に腐食が発生することを避けがたい。したがって、上記止め輪の腐食に起因して止め輪の摩耗が、予想より速く進むことを避けがたい。したがって、止め輪の腐食および摩耗によって、アキシアル隙間が増大して、軸部材のアキシアル方向移動量が大きくなることを避けがたい。したがって、このことに起因してシールリングに摺接する密封装置の摩耗が予想よりも速く起こって、密封装置の密封性能の低下にともなって冷却水が予想よりも早期に内部に浸入し易くなることを避けがたい。
実開平5−028504号公報
However, even if the retaining ring is protected by the retaining ring cover, corrosion of the retaining ring cannot be completely protected, and it is difficult to avoid corrosion of the retaining ring. Therefore, it is difficult to avoid that the wear of the retaining ring proceeds faster than expected due to the corrosion of the retaining ring. Therefore, it is unavoidable that the axial clearance increases due to corrosion and wear of the retaining ring, and the axial movement amount of the shaft member increases. Therefore, the wear of the sealing device that is in sliding contact with the seal ring occurs faster than expected due to this, and it becomes easier for the cooling water to enter the interior earlier than expected as the sealing performance of the sealing device decreases. Inevitable.
Japanese Utility Model Publication No. 5-028504

そこで、本発明の課題は、アキシアル荷重を負荷する性能に優れ、冷却水等の異物が転動体配置室(内部)に浸入することを抑制する性能に優れる軸受装置を提供することにある。   Then, the subject of this invention is providing the bearing apparatus which is excellent in the performance which loads an axial load, and is excellent in the performance which suppresses foreign materials, such as cooling water, permeating into a rolling element arrangement | positioning chamber (inside).

上記課題を解決するため、この発明のころ軸受装置は、
軌道面と雄ねじ部とを外周面に有する内側軌道部材と、
軌道面を内周面に有する外側軌道部材と、
上記内側軌道部材と上記外側軌道部材との間に配置されたころと、
上記内側軌道部材の軸方向の一端部と、上記外側軌道部材の軸方向の一端部との間を密封する環状の密封装置と
を備え、
上記密封装置は、
上記外側軌道部材に固定された環状の密封部材と、
上記内側軌道部材の上記雄ねじ部に螺合する雌ねじ部を有する内周面と、上記密封部材が摺動する摺動面とを有する環状の雌ねじ部材と
を有し、
上記雌ねじ部材の上記内周面において上記雌ねじ部よりも軸方向の外方に位置する部分と、上記内側軌道部材の上記外周面との間にOリングを備え
上記雌ねじ部材と、上記内側軌道部材との接合部の軸方向の外方側の端部が、外部に露出していることを特徴としている。
In order to solve the above problems, the roller bearing device of the present invention is
An inner race member having a raceway surface and a male screw portion on the outer peripheral surface;
An outer race member having a raceway surface on the inner peripheral surface;
A roller disposed between the inner race member and the outer race member;
An annular sealing device that seals between one axial end of the inner race member and one axial end of the outer race member;
The sealing device is
An annular sealing member fixed to the outer race member;
An inner peripheral surface having an internal thread portion that is screwed into the external thread portion of the inner race member, and an annular internal thread member having a sliding surface on which the sealing member slides,
An O-ring is provided between a portion of the inner peripheral surface of the female screw member positioned axially outward from the female screw portion and the outer peripheral surface of the inner raceway member ;
And the female screw member, the end portion of the outer side in the axial direction of the joint between the inner raceway member, is characterized that you have exposed to the outside.

本発明者は、使用後の上記従来のころ軸受装置の実機の調査を行った。その結果、止め輪において腐食が見られ、また、軸部材の外周面およびシールリングの内周面については、Oリングよりも軸方向の外方側で腐食が顕著である一方、Oリングよりも軸方向の内方側では、腐食が殆ど見られないことを発見した。   The inventor has investigated the actual machine of the conventional roller bearing device after use. As a result, corrosion is observed in the retaining ring, and the outer peripheral surface of the shaft member and the inner peripheral surface of the seal ring are more prominent on the outer side in the axial direction than the O-ring, but more than the O-ring. It was found that there was almost no corrosion on the inner side in the axial direction.

本発明者は、この現象について、Oリングよりも軸方向の内方側では、潤滑がリッチであり、腐食や、腐食に起因する摩耗が殆ど起こらないためではないかと推察している。   The present inventor has inferred that this phenomenon is because the lubrication is rich on the inner side in the axial direction from the O-ring, and corrosion and wear resulting from the corrosion hardly occur.

そして、本発明者は、従来、腐食の発生の心配から、当業者において、検討もされていなかった、アキシアル荷重の負荷に、止め輪を使用せず、止め輪の替わりにねじ止め構造を導入する構成が、導入可能であり、かつ、長期に亘って有効であり、かつ、部品点数も低減できて、材料コストの低減につながることを発見した。   Then, the present inventor has introduced a screw structure instead of a retaining ring without using a retaining ring for the load of an axial load, which has not been studied by those skilled in the art because of concern about the occurrence of corrosion. It has been found that the configuration to be introduced can be introduced and effective for a long period of time, and the number of parts can be reduced, leading to a reduction in material cost.

本発明によれば、内側軌道部材の外周面の雄ねじ部に、雌ねじ部材の雌ねじ部を螺合する構成であるから、内側軌道部材に対して雌ねじ部材が軸方向に相対移動することを確実に防止できて、雌ねじ部材で確実にスラスト荷重を負荷することができる。また、上記内側軌道部材に対して雌ねじ部材が軸方向に相対移動することを確実に防止できるから、軸部材のアキシアル方向の移動量が大きくなることがなくて、密封装置の摩耗を低減できる。したがって、密封装置の密封性能の低下を防止でき、外部の冷却水等の異物が軸受内に浸入することを防止できる。   According to the present invention, since the female screw portion of the female screw member is screwed to the male screw portion on the outer peripheral surface of the inner race member, it is ensured that the female screw member moves relative to the inner race member in the axial direction. The thrust load can be reliably applied by the female screw member. Further, since the female screw member can be reliably prevented from moving in the axial direction relative to the inner race member, the axial movement amount of the shaft member does not increase, and the wear of the sealing device can be reduced. Therefore, the sealing performance of the sealing device can be prevented from being lowered, and foreign matters such as external cooling water can be prevented from entering the bearing.

また、本発明によれば、Oリングが、雌ねじ部材の内周面において、雌ねじ部よりも軸方向の外方に位置しているから、このOリングで雌ねじ部の腐食を、確実に防止できる。したがって、雌ねじ部材の雌ねじ部の腐食、錆等により、雌ねじ部材の螺合および取り外しが行いにくくなることがなくて、アキシアル荷重を長期に亘って負荷できると同時に、雌ねじ部材を螺合および取り外しを行うだけで、簡単に、ころ軸受装置のメンテナンスを行うことができる。   Further, according to the present invention, since the O-ring is positioned outward in the axial direction from the female screw portion on the inner peripheral surface of the female screw member, the O-ring can reliably prevent corrosion of the female screw portion. . Therefore, it is not difficult to screw and remove the female screw member due to corrosion, rust, etc. of the female screw part of the female screw member, and the axial load can be applied for a long time, and at the same time, the female screw member can be screwed and removed. Maintenance of the roller bearing device can be easily performed simply by carrying out.

また、一実施形態では、
上記内側軌道部材の上記外周面および上記雌ねじ部材の上記内周面の夫々は、段部を有し、
上記内側軌道部材の上記段部と、上記雌ねじ部材の上記段部とは、当接している。
In one embodiment,
Each of the outer peripheral surface of the inner race member and the inner peripheral surface of the female screw member has a stepped portion,
The step portion of the inner race member is in contact with the step portion of the female screw member.

上記実施形態によれば、雌ねじ部材を、内側軌道部材に対して軸方向に正確に位置決めできる。したがって、雌ねじ部材で、アキシアル荷重を、確実に負荷することができる。   According to the embodiment, the female screw member can be accurately positioned in the axial direction with respect to the inner race member. Therefore, the axial load can be reliably applied by the female screw member.

また、一実施形態では、
上記雌ねじ部材は、上記ころの端面に摺接する鍔面を有する。
In one embodiment,
The female screw member has a flange surface that is in sliding contact with the end surface of the roller.

上記実施形態によれば、雌ねじ部材は、上記ころの端面に摺接する鍔面を有しているから、ころの端面を介してアキシアル荷重を確実に負荷することができる。   According to the embodiment, since the female screw member has the flange surface that is in sliding contact with the end face of the roller, an axial load can be reliably applied through the end face of the roller.

また、本発明のバックアップロールは、
本発明のころ軸受装置を備え、
上記ころ軸受装置の上記外側軌道部材は、回転自在の外筒部材である。
The backup roll of the present invention is
Comprising the roller bearing device of the present invention,
The outer race member of the roller bearing device is a rotatable outer cylinder member.

本発明によれば、密封装置の劣化の進行を遅くすることができて、バックアップロール内に冷却水等の異物が侵入することを長期に亘って防止できる。また、ワークロールの支持によって撓むことにより発生するアキシアル荷重を、長期に亘って負荷できて吸収することができる。   According to the present invention, the progress of the deterioration of the sealing device can be slowed and foreign substances such as cooling water can be prevented from entering the backup roll over a long period of time. Moreover, the axial load which generate | occur | produces by bending by support of a work roll can be loaded and absorbed over a long period of time.

本発明のころ軸受装置およびこのころ軸受装置を備えたバックアップロールによれば、密封装置の劣化の進行を遅くすることができて、ころ軸受装置内に冷却水等の異物が侵入することを長期に亘って防止できる。   According to the roller bearing device of the present invention and the backup roll provided with the roller bearing device, the progress of the deterioration of the sealing device can be slowed, and foreign matter such as cooling water can enter the roller bearing device for a long time. Can be prevented.

また、本発明のころ軸受装置およびこのころ軸受装置を備えたバックアップロールによれば、アキシアル荷重を長期に亘って確実に負荷することができると共に、雌ねじ部材を螺合および取り外しを行うだけで、簡易に、ころ軸受装置のメンテナンスを行うことができる。   Further, according to the roller bearing device of the present invention and the backup roll provided with this roller bearing device, it is possible to reliably load an axial load over a long period of time, and only by screwing and removing the female screw member, Maintenance of the roller bearing device can be easily performed.

以下、本発明を図示の形態により詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the drawings.

図1は、本発明の一実施形態のころ軸受装置であるバックアップロールの軸方向の断面図である。   FIG. 1 is a sectional view in the axial direction of a backup roll which is a roller bearing device according to an embodiment of the present invention.

このバックアップロールは、圧延機(図示せず)において、鋼板を矯正するワークロールをバックアップしている。このバックアップロールは、外側軌道部材としての外筒部材1、内側軌道部材としての軸部材2、複数の第1円筒ころ3、複数の第2円筒ころ4、複数の第3円筒ころ5、複数の第4円筒ころ6、第1案内輪7、第2案内輪8、第3案内輪9、第1密封装置10および第2密封装置11を備える。   The backup roll backs up a work roll that straightens the steel sheet in a rolling mill (not shown). The backup roll includes an outer cylindrical member 1 as an outer race member, a shaft member 2 as an inner race member, a plurality of first cylindrical rollers 3, a plurality of second cylindrical rollers 4, a plurality of third cylindrical rollers 5, and a plurality of A fourth cylindrical roller 6, a first guide wheel 7, a second guide wheel 8, a third guide wheel 9, a first sealing device 10 and a second sealing device 11 are provided.

上記外筒部材1は、上記ワークロールまたは他のバックアップロールに接触し、ワークロールまたは他のバックアップロールの回転にともなって、回転するようになっている。上記外筒部材1は、円筒内周面48を有している。一方、軸部材2は、固定されている。上記軸部材2は、円筒外周面49を有している。   The outer cylinder member 1 comes into contact with the work roll or another backup roll, and rotates as the work roll or the other backup roll rotates. The outer cylinder member 1 has a cylindrical inner peripheral surface 48. On the other hand, the shaft member 2 is fixed. The shaft member 2 has a cylindrical outer peripheral surface 49.

上記複数の第1、第2、第3および第4円筒ころ3,4,5,6は、軸方向に4列に配置されている。上記複数の第1円筒ころ3および複数の第2円筒ころ4の夫々は、外筒部材1の円筒内周面48と、軸部材2の円筒外周面49との間に、軸方向の両側にくし状部を有する第1保持器15によって保持されている状態で、周方向に互いに間隔おいて配置されている。また、上記複数の第3円筒ころ5および複数の第2円筒ころ6の夫々は、外筒部材1の円筒内周面48と、軸部材2の円筒外周面49との間に、軸方向の両側にくし状部を有する第2保持器16によって保持されている状態で、周方向に互いに間隔おいて配置されている。   The plurality of first, second, third and fourth cylindrical rollers 3, 4, 5, 6 are arranged in four rows in the axial direction. Each of the plurality of first cylindrical rollers 3 and the plurality of second cylindrical rollers 4 is provided on both sides in the axial direction between the cylindrical inner peripheral surface 48 of the outer cylindrical member 1 and the cylindrical outer peripheral surface 49 of the shaft member 2. In the state hold | maintained by the 1st holder | retainer 15 which has a comb-shaped part, it arrange | positions at intervals in the circumferential direction. Further, each of the plurality of third cylindrical rollers 5 and the plurality of second cylindrical rollers 6 has an axial direction between a cylindrical inner peripheral surface 48 of the outer cylindrical member 1 and a cylindrical outer peripheral surface 49 of the shaft member 2. In the state hold | maintained by the 2nd holder | retainer 16 which has a comb-shaped part on both sides, it arrange | positions at intervals in the circumferential direction.

上記第1、第2および第3案内輪7,8,9の夫々は、軸部材2の外周面に隙間嵌めされている。上記第1案内輪7は、軸方向において、第1円筒ころ3と第2円筒ころ4との間に配置され、第2案内輪8は、軸方向において、第2円筒ころ4と第3円筒ころ5との間に配置されている。また、上記第3案内輪9は、軸方向において、第3円筒ころ5と第4円筒ころ6との間に配置されている。上記各円筒ころ3,4,5,6と、その円筒ころ3,4,5,6に軸方向に隣接する案内輪7,8,9とは、当接している。   Each of the first, second and third guide wheels 7, 8, 9 is fitted into the outer peripheral surface of the shaft member 2 with a gap. The first guide wheel 7 is disposed between the first cylindrical roller 3 and the second cylindrical roller 4 in the axial direction, and the second guide wheel 8 is disposed between the second cylindrical roller 4 and the third cylinder in the axial direction. It is arranged between the rollers 5. The third guide wheel 9 is disposed between the third cylindrical roller 5 and the fourth cylindrical roller 6 in the axial direction. The cylindrical rollers 3, 4, 5, 6 are in contact with the guide rollers 7, 8, 9 adjacent to the cylindrical rollers 3, 4, 5, 6 in the axial direction.

上記軸部材2は、大径外周面50および小径外周面51を有し、大径外周面50は、円筒外周面49よりも大きな外径を有する一方、小径外周面51は、円筒外周面49よりも小さな外径を有する。上記大径外周面50は、第1段部26を介して円筒外周面49に連なっている一方、小径外周面51は、第2段部27を介して円筒外周面49に連なっている。上記第1円筒ころ3は、第1段部26に当接している。   The shaft member 2 has a large-diameter outer peripheral surface 50 and a small-diameter outer peripheral surface 51. The large-diameter outer peripheral surface 50 has a larger outer diameter than the cylindrical outer peripheral surface 49, while the small-diameter outer peripheral surface 51 is a cylindrical outer peripheral surface 49. Has a smaller outer diameter. The large-diameter outer peripheral surface 50 continues to the cylindrical outer peripheral surface 49 via the first step portion 26, while the small-diameter outer peripheral surface 51 continues to the cylindrical outer peripheral surface 49 via the second step portion 27. The first cylindrical roller 3 is in contact with the first step portion 26.

上記第1密封装置10は、第1円筒ころ3の軸方向の外方側に位置している。上記第1密封装置10は、外筒部材1と軸部材2との間の軸方向の一方の側の開口を密封している。上記第1密封装置10は、密封部材19、スリンガ22および止め輪23を備え、密封部材19は、環状の外筒内嵌部20と、環状の密封部21とを有する。   The first sealing device 10 is located on the outer side in the axial direction of the first cylindrical roller 3. The first sealing device 10 seals the opening on one side in the axial direction between the outer cylinder member 1 and the shaft member 2. The first sealing device 10 includes a sealing member 19, a slinger 22, and a retaining ring 23, and the sealing member 19 includes an annular outer cylinder fitting portion 20 and an annular sealing portion 21.

上記外筒内嵌部20は、外筒部材1の内周面の軸方向の一端部に内嵌されて固定されている。上記外筒内嵌部20の軸方向の第1円筒ころ3側の端面は、第1円筒ころ3の軸方向の外方側の端面に当接している。上記止め輪23は、断面略矩形の形状を有している。上記止め輪23は、その一部が、外筒部材1の内周面に形成された環状の係合溝に係合している一方、その一部以外の部分は、外筒部材1の内周面から径方向の内方に突出している。上記止め輪23の上記一部以外の部分の軸方向の端面は、外筒内嵌部20の軸方向の外方側の端面に当接している。   The outer cylinder fitting portion 20 is fitted and fixed to one axial end portion of the inner circumferential surface of the outer cylinder member 1. The end surface on the first cylindrical roller 3 side in the axial direction of the outer cylinder fitting portion 20 is in contact with the end surface on the outer side in the axial direction of the first cylindrical roller 3. The retaining ring 23 has a substantially rectangular cross section. A part of the retaining ring 23 is engaged with an annular engagement groove formed on the inner peripheral surface of the outer cylinder member 1, while the other part is the inner part of the outer cylinder member 1. Projecting radially inward from the peripheral surface. The axial end surface of the part other than the part of the retaining ring 23 is in contact with the axially outer end surface of the outer tube fitting portion 20.

上記スリンガ22は、軸部材2の外周面に締まり嵌めにより外嵌されて固定されている。上記スリンガ22は、円筒状部と、径方向延在部とを有し、円筒状部は、締まり嵌めにより、軸部材2の外周面に外嵌されて固定されている。一方、上記径方向延在部は、円筒状部の軸方向の外方側の端部から径方向の外方に延在している。上記径方向延在部の径方向の外方の端部と、外筒部材1の内周面とは、ラビリンスシールを構成している。上記外筒内嵌部20は、スリンガ22に対して間隔をおいて位置している。詳述しないが、上記密封部21は、芯金部と、弾性部とを有し、芯金部は、外筒内嵌部20の内周面に締まり嵌めにより内嵌されて固定されている。また、上記弾性部は、芯金部に固着され、スリンガ22の円筒状部に摺動するリップ部を有している。   The slinger 22 is externally fitted and fixed to the outer peripheral surface of the shaft member 2 by an interference fit. The slinger 22 has a cylindrical portion and a radially extending portion, and the cylindrical portion is fitted and fixed to the outer peripheral surface of the shaft member 2 by an interference fit. On the other hand, the radially extending portion extends radially outward from the axially outward end of the cylindrical portion. The radially outer end of the radially extending portion and the inner peripheral surface of the outer cylinder member 1 constitute a labyrinth seal. The outer cylinder fitting portion 20 is located at a distance from the slinger 22. Although not described in detail, the sealing part 21 has a cored bar part and an elastic part, and the cored bar part is fitted and fixed to the inner peripheral surface of the outer cylinder fitting part 20 by an interference fit. . Further, the elastic part has a lip part fixed to the cored bar part and sliding on the cylindrical part of the slinger 22.

上記第2密封装置11は、第4円筒ころ6の軸方向の外方側に位置している。上記第2密封装置11は、外筒部材1と軸部材2との間の軸方向の他方の側の開口を密封している。   The second sealing device 11 is located on the outer side in the axial direction of the fourth cylindrical roller 6. The second sealing device 11 seals the opening on the other side in the axial direction between the outer cylinder member 1 and the shaft member 2.

図2は、上記第2密封装置11の周辺の軸方向の拡大断面図である。   FIG. 2 is an enlarged sectional view in the axial direction around the second sealing device 11.

上記第2密封装置11は、密封部材78、雌ねじ部材79および止め輪44を備え、密封部材78は、環状の外筒内嵌部40と、環状の密封部42とを有する。また、上記雌ねじ部材79は、環状の雌ねじ本体部41と、スリンガ43とを有する。   The second sealing device 11 includes a sealing member 78, a female screw member 79, and a retaining ring 44, and the sealing member 78 has an annular outer cylinder fitting portion 40 and an annular sealing portion 42. The female screw member 79 includes an annular female screw main body 41 and a slinger 43.

上記外筒内嵌部40は、外筒部材1の内周面の軸方向の他端部に内嵌されて固定されている。上記外筒内嵌部40の軸方向の第4円筒ころ6側の端面は、第4円筒ころ6の軸方向の外方側の端面に当接している。上記止め輪44は、断面略矩形の形状を有している。上記止め輪44は、その一部が、外筒部材1の内周面に形成された環状の係合溝に係合している一方、その一部以外の部分は、外筒部材1の内周面から径方向の内方に突出している。上記止め輪44の上記一部以外の部分の軸方向の端面は、外筒内嵌部40の軸方向の外方側の端面に当接している。   The outer cylinder fitting portion 40 is fitted and fixed to the other axial end portion of the inner circumferential surface of the outer cylinder member 1. An end surface on the fourth cylindrical roller 6 side in the axial direction of the outer cylinder fitting portion 40 is in contact with an end surface on the outer side in the axial direction of the fourth cylindrical roller 6. The retaining ring 44 has a substantially rectangular cross section. A part of the retaining ring 44 is engaged with an annular engaging groove formed on the inner peripheral surface of the outer cylinder member 1, while the other part is the inner part of the outer cylinder member 1. Projecting radially inward from the peripheral surface. The axial end surface of the part other than the part of the retaining ring 44 is in contact with the axially outer end surface of the outer tube fitting part 40.

上記雌ねじ本体部41は、軸部材2に螺合により固定されている。詳しくは、上記軸部材2は、小径外周面51に雄ねじ部53を有する。上記雌ねじ本体部41の内周面は、雌ねじ部55と、環状のOリング係合溝56とを有し、雌ねじ部55は、雌ねじ本体部41の軸方向の端面から軸方向に間隔をおいた箇所に位置している。上記雌ねじ本体部41の雌ねじ部55は、軸部材2の雄ねじ部53に螺合している。   The female screw main body 41 is fixed to the shaft member 2 by screwing. Specifically, the shaft member 2 has a male screw portion 53 on the small-diameter outer peripheral surface 51. The inner peripheral surface of the female screw main body 41 has a female screw portion 55 and an annular O-ring engagement groove 56, and the female screw portion 55 is spaced from the axial end surface of the female screw main body portion 41 in the axial direction. It is located where it was. The female screw portion 55 of the female screw main body 41 is screwed into the male screw portion 53 of the shaft member 2.

上記雌ねじ本体部41は、小径円筒内周面75を有し、この小径円筒内周面75は、雌ねじ部55の軸方向の外方に段部81を介して連なっている。上記小径円筒内周面75は、雌ねじ部55よりも軸方向の外方に位置している。上記小径円筒内周面75は、雌ねじ部55の内径よりも小さい内径を有している。上記Oリング係合溝56は、小径円筒内周面75に形成されている。   The female screw main body portion 41 has a small-diameter cylindrical inner peripheral surface 75, and the small-diameter cylindrical inner peripheral surface 75 is connected to the outer side in the axial direction of the female screw portion 55 via a step portion 81. The small-diameter cylindrical inner peripheral surface 75 is positioned outward in the axial direction from the female screw portion 55. The small-diameter cylindrical inner peripheral surface 75 has an inner diameter that is smaller than the inner diameter of the female screw portion 55. The O-ring engagement groove 56 is formed on the inner peripheral surface 75 of the small diameter cylinder.

上記小径円筒内周面75は、軸部材2の外周面に隙間嵌めされている。詳しくは、上記軸部材2は、小径円筒外周面95を有し、この小径円筒内周面95は、雄ねじ部53の軸方向の外方の端部に、段部91を介して連なっている。上記小径円筒外周面95は、雄ねじ部53よりも軸方向の外方に位置している。上記小径円筒外周面95は、雄ねじ部53の外径よりも小さい外径を有している。上記小径円筒内周面75は、小径円筒外周面95に、隙間嵌めされている。上記小径円筒内周面75は、小径円筒外周面95に、中間嵌めされていても良い。   The small-diameter cylindrical inner peripheral surface 75 is fitted into the outer peripheral surface of the shaft member 2 with a gap. Specifically, the shaft member 2 has a small-diameter cylindrical outer peripheral surface 95, and the small-diameter cylindrical inner peripheral surface 95 is connected to an outer end portion in the axial direction of the male screw portion 53 via a step portion 91. . The small-diameter cylindrical outer peripheral surface 95 is located outward in the axial direction from the male screw portion 53. The small-diameter cylindrical outer peripheral surface 95 has an outer diameter smaller than the outer diameter of the male screw portion 53. The small-diameter cylindrical inner peripheral surface 75 is fitted into the small-diameter cylindrical outer peripheral surface 95 with a gap. The small diameter cylindrical inner peripheral surface 75 may be intermediately fitted to the small diameter cylindrical outer peripheral surface 95.

上記Oリング係合溝56の底面と、軸部材2の小径円筒外周面95との間には、Oリング80が配設されている。上記雌ねじ本体部41は、治具係合穴70を有し、この治具係合穴70は、軸方向の第4円筒ころ6側とは反対側の端面に開口している。この治具係合穴70に治具の先端を挿入して、その挿入した治具により、雌ねじ本体部41に回転トルクを付与する。このようにして、上記雌ねじ本体部41の軸方向の第4円筒ころ6側の端面(鍔面)90が、第2円筒ころ6の軸方向の端面93に当接し、かつ、雌ねじ本体部41の内周側の段部81が、軸部材2の段部91に当接するまで、雌ねじ本体部41を、第4円筒ころ6の方に螺合により締め込むようにする。   An O-ring 80 is disposed between the bottom surface of the O-ring engagement groove 56 and the small-diameter cylindrical outer peripheral surface 95 of the shaft member 2. The female screw main body 41 has a jig engaging hole 70, and the jig engaging hole 70 is opened on the end surface opposite to the fourth cylindrical roller 6 side in the axial direction. The tip of the jig is inserted into the jig engaging hole 70, and rotational torque is applied to the female screw main body 41 by the inserted jig. In this manner, the end surface (ridge surface) 90 on the fourth cylindrical roller 6 side in the axial direction of the female screw main body 41 abuts on the end surface 93 in the axial direction of the second cylindrical roller 6, and the female screw main body 41. The internal thread main body 41 is tightened to the fourth cylindrical roller 6 by screwing until the inner peripheral side step 81 abuts on the step 91 of the shaft member 2.

上記スリンガ43は、円筒状部と、径方向延在部とを有し、円筒状部は、締まり嵌めにより、雌ねじ本体部41の外周面に外嵌されて固定されている。一方、上記径方向延在部は、円筒状部の軸方向の外方側の端部から径方向の外方に延在している。上記径方向延在部の径方向の外方の端部と、外筒部材1の内周面とは、ラビリンスシールを構成している。上記外筒内嵌部40は、スリンガ43に対して間隔をおいて位置している。詳述しないが、上記密封部42は、芯金部と、弾性部とを有し、芯金部は、外筒内嵌部40の内周面に締まり嵌めにより内嵌されて固定されている。また、上記弾性部は、芯金部に固着され、スリンガ43の円筒状部の外周面に摺動するリップ部を有している。上記スリンガ43の円筒状部の外周面は、雌ねじ部材79において、密封部材78が摺動する摺動面を構成している。   The slinger 43 has a cylindrical portion and a radially extending portion, and the cylindrical portion is externally fitted and fixed to the outer peripheral surface of the female screw main body 41 by an interference fit. On the other hand, the radially extending portion extends radially outward from the axially outward end of the cylindrical portion. The radially outer end of the radially extending portion and the inner peripheral surface of the outer cylinder member 1 constitute a labyrinth seal. The outer cylinder fitting portion 40 is located at a distance from the slinger 43. Although not described in detail, the sealing part 42 has a cored bar part and an elastic part, and the cored bar part is fitted and fixed to the inner peripheral surface of the outer cylinder fitting part 40 by an interference fit. . The elastic part has a lip part that is fixed to the cored bar part and slides on the outer peripheral surface of the cylindrical part of the slinger 43. The outer peripheral surface of the cylindrical portion of the slinger 43 constitutes a sliding surface on which the sealing member 78 slides in the female screw member 79.

このバックアップロールは、図示しない給脂通路を介して、外部から潤滑剤が、給脂されつつ使用されるようになっている。このバックアップロールは、潤滑剤を、軸方向の両側において、スリンガ22,43と、外筒部材1との間から少しずつ排出しながら、ワークロールをバックアップするようになっている。   This backup roll is used while being lubricated with lubricant from the outside via a greasing passage (not shown). This backup roll backs up the work roll while discharging the lubricant little by little from between the slinger 22, 43 and the outer cylinder member 1 on both sides in the axial direction.

上記構成において、図1および図2を参照して、例えば、第4円筒ころ6の軸方向の外方側でかつ径方向の外方側から、第1円筒ころ3の軸方向の外方側でかつ径方向の内方側に荷重がかかった際には、止め輪44(図2参照)、外筒内嵌部40、第4円筒ころ6、第3案内輪9(図1参照)、第3円筒ころ5、第2案内輪8、第2円筒ころ4、第1案内輪7、第1円筒ころ3および第1段部26で、その荷重を負荷するようになっている。   In the above configuration, referring to FIG. 1 and FIG. 2, for example, the outer side in the axial direction of the first cylindrical roller 3 from the outer side in the axial direction of the fourth cylindrical roller 6 and the outer side in the radial direction. When a load is applied to the radially inward side, the retaining ring 44 (see FIG. 2), the outer cylinder fitting portion 40, the fourth cylindrical roller 6, the third guide wheel 9 (see FIG. 1), The third cylindrical roller 5, the second guide wheel 8, the second cylindrical roller 4, the first guide wheel 7, the first cylindrical roller 3, and the first step portion 26 are adapted to load the load.

また、例えば、第1円筒ころ3の軸方向の外方側でかつ径方向の外方側から、第4円筒ころ6の軸方向の外方側でかつ径方向の内方側に荷重がかかった際には、止め輪23(図1参照)、外筒内嵌部20、第1円筒ころ3、第1案内輪7、第2円筒ころ4、第2案内輪8、第3円筒ころ5、第3案内輪9、第4円筒ころ6および雌ねじ本体部41で、その荷重を負荷するようになっている。   Further, for example, a load is applied from the outer side in the axial direction of the first cylindrical roller 3 to the outer side in the axial direction of the fourth cylindrical roller 6 and from the outer side in the radial direction. In this case, the retaining ring 23 (see FIG. 1), the outer cylinder fitting portion 20, the first cylindrical roller 3, the first guide wheel 7, the second cylindrical roller 4, the second guide wheel 8, and the third cylindrical roller 5 are used. The third guide wheel 9, the fourth cylindrical roller 6, and the female screw main body 41 are adapted to apply the load.

本発明者は、使用不能になった従来のころ軸受装置の調査を行った。その結果、軸部材の外周面に係止されている止め輪において顕著な腐食が見られた。また、軸部材の外周面およびシールリングの内周面については、Oリングよりも軸方向の外方側で腐食が顕著である一方、Oリングよりも軸方向の内方側では、腐食が殆ど見られなかった。   The inventor has investigated a conventional roller bearing device that has become unusable. As a result, significant corrosion was observed in the retaining ring that is locked to the outer peripheral surface of the shaft member. Further, the outer peripheral surface of the shaft member and the inner peripheral surface of the seal ring are significantly corroded on the outer side in the axial direction from the O-ring, while the corrosion is almost on the inner side in the axial direction from the O-ring. I couldn't see it.

本発明者は、この現象の理由について、Oリングよりも軸方向の内方側では、潤滑がリッチであり、腐食や、腐食に起因する摩耗が殆ど起こらないためではないかと推察している。   The present inventor has inferred that the reason for this phenomenon is that lubrication is rich on the inner side in the axial direction from the O-ring, and corrosion and wear due to corrosion hardly occur.

また、本発明者は、径方向の外方に位置する止め輪(この実施形態のバックアップロールにおいては、止め輪23,44に相当)において、腐食が殆ど見られなかった理由は、このバックアップロールは、図示しない給脂通路を介して、外部から潤滑剤が、給脂されつつ使用されるようになっているから、スリンガと外筒部材との間がラビリンスシールになっている構成(この実施形態でも、この構成になっている)においては、スリンガと外筒部材との間から、潤滑剤が徐々に排出されることになり、ラビリンスシールに近い止め輪付近に、新鮮な潤滑剤が供給され易くなり、ラビリンスシールに近い止め輪付近の潤滑がリッチになることによるものと推察している。   The inventor has also found that the corrosion of the retaining ring positioned outward in the radial direction (corresponding to the retaining rings 23 and 44 in the backup roll of this embodiment) was hardly observed. Since the lubricant is used while being lubricated from the outside via a greasing passage (not shown), the labyrinth seal is formed between the slinger and the outer cylinder member (this implementation). In this configuration, the lubricant is gradually discharged from between the slinger and the outer cylinder member, and fresh lubricant is supplied near the retaining ring close to the labyrinth seal. It is presumed that the lubrication near the retaining ring near the labyrinth seal becomes rich.

上記実施形態の円筒ころ軸受装置(バックアップロール)によれば、軸部材2の外周面の雄ねじ部53に、雌ねじ本体部41の雌ねじ部55を螺合する構成であるから、軸部材2に対して雌ねじ本体部41が軸方向に相対移動することを確実に防止できて、雌ねじ本体部41で確実にスラスト荷重を負荷することができる。また、上記軸部材2に対して雌ねじ本体部41が軸方向に相対移動することを確実に防止できるから、雌ねじ部材79のアキシアル方向移動量が大きくなることに起因する密封部42のシールリップの摩耗を防止できる。したがって、上記密封部42のシールリップの締め代の減少の進行を遅らすことができる。したがって、密封装置の密封性能の低下を抑制でき、外部の冷却水等の異物が軸受内に浸入することを抑制する性能を格段に向上させることができる。   According to the cylindrical roller bearing device (backup roll) of the above embodiment, since the female screw portion 55 of the female screw main body portion 41 is screwed into the male screw portion 53 on the outer peripheral surface of the shaft member 2, Thus, the female screw main body 41 can be reliably prevented from relatively moving in the axial direction, and the female screw main body 41 can reliably apply a thrust load. Further, since it is possible to reliably prevent the female screw main body portion 41 from moving relative to the shaft member 2 in the axial direction, the seal lip of the sealing portion 42 caused by the increased amount of movement of the female screw member 79 in the axial direction. Wear can be prevented. Accordingly, it is possible to delay the progress of the reduction in the tightening margin of the sealing lip of the sealing portion 42. Therefore, it is possible to suppress the deterioration of the sealing performance of the sealing device, and it is possible to significantly improve the performance of suppressing the entry of foreign matter such as external cooling water into the bearing.

また、上記実施形態のころ軸受装置によれば、上記Oリング80が、雌ねじ部材79の内周面において、雌ねじ部55よりも軸方向の外方に位置しているから、このOリング80で雌ねじ部55の腐食を、確実に防止できて、雌ねじ本体部41が、腐食によって、螺合および取り外ししにくくなることがない。したがって、アキシアル荷重を長期に亘って負荷できると同時に、雌ねじ本体部41を螺合および取り外しを行うだけで、簡易に、ころ軸受装置のメンテナンスを行うことができる。   Further, according to the roller bearing device of the above embodiment, the O-ring 80 is positioned on the outer peripheral surface of the female screw member 79 in the axial direction from the female screw portion 55. Corrosion of the internal thread portion 55 can be reliably prevented, and the internal thread body portion 41 does not become difficult to be screwed and removed due to corrosion. Therefore, an axial load can be applied over a long period of time, and at the same time, maintenance of the roller bearing device can be performed simply by screwing and removing the female screw main body 41.

また、上記実施形態のころ軸受装置によれば、軸部材2の外周面の段部91と、雌ねじ本体部41の内周面の段部81とが、当接しているから、雌ねじ本体部41を、軸部材2に対して軸方向に正確に位置決めできる。したがって、上記雌ねじ本体部41で、アキシアル荷重を、確実に負荷することができる。   Further, according to the roller bearing device of the above embodiment, the step 91 on the outer peripheral surface of the shaft member 2 and the step 81 on the inner peripheral surface of the female screw main body 41 are in contact with each other. Can be accurately positioned in the axial direction with respect to the shaft member 2. Therefore, an axial load can be reliably applied by the female screw main body 41.

また、上記実施形態のころ軸受装置によれば、上記雌ねじ本体部41が、第4円筒ころ6の端面に摺接する端面(鍔面)90を有しているから、第4円筒ころ6の端面を介してアキシアル荷重を確実に負荷することができる。   Further, according to the roller bearing device of the above embodiment, the female screw main body 41 has the end surface (ridge surface) 90 that is in sliding contact with the end surface of the fourth cylindrical roller 6. Through this, the axial load can be reliably applied.

尚、上記実施形態のころ軸受装置では、第1乃至4円筒ころ3,4,5,6が、軸方向に4列に配置されていたが、この発明では、円筒ころが、軸方向に1列、2列、または、3列に配置されても良く、また、円筒ころが、軸方向に5列以上に配置されていても良い。また、この発明では、転動体に、円錐ころや、凸面ころが含まれていても良い。この発明では、転動体に、ころが、含まれていれば良く、違った種類のころを、同時に含んでいても良い。   In the roller bearing device of the above embodiment, the first to fourth cylindrical rollers 3, 4, 5, 6 are arranged in four rows in the axial direction. However, in the present invention, the cylindrical rollers are 1 in the axial direction. The rows may be arranged in two rows, or three rows, and the cylindrical rollers may be arranged in five or more rows in the axial direction. In the present invention, the rolling element may include a tapered roller or a convex roller. In the present invention, it is sufficient that the rolling elements include rollers, and different types of rollers may be included at the same time.

また、上記実施形態のころ軸受装置では、内側軌道部材が、軸部材2であったが、この発明では、内側軌道部材は、環状の内輪であっても良い。   Moreover, in the roller bearing device of the above embodiment, the inner race member is the shaft member 2, but in this invention, the inner race member may be an annular inner ring.

また、上記実施形態のころ軸受装置では、雌ねじ本体部41が、軸方向の一方側のみに配置されたが、この発明では、雌ねじ部材は、軸方向の両側に配置されていても良い。   In the roller bearing device of the above embodiment, the female thread main body 41 is disposed only on one side in the axial direction. However, in the present invention, the female thread member may be disposed on both sides in the axial direction.

また、上記実施形態のころ軸受装置では、図2に示すように、密封部42のリップ部が、スリンガの円筒状部の外周面のみに摺動しているが、この発明では、密封部材のリップ部は、スリンガの円筒状部の外周面およびスリンガの径方向延在部の軸方向の端面のうちの少なくとも一方に摺動していれば良い。また、この発明では、スリンガがなくて、密封装置のリップ部が、雌ねじ部材の外周面に摺動する構成であっても良く、密封装置と、雌ねじ部材の外周面とが、ラビリンスシールを構成していても良い。   Moreover, in the roller bearing device of the above embodiment, as shown in FIG. 2, the lip portion of the sealing portion 42 slides only on the outer peripheral surface of the cylindrical portion of the slinger. The lip portion only has to slide on at least one of the outer peripheral surface of the cylindrical portion of the slinger and the axial end surface of the radially extending portion of the slinger. Further, in the present invention, there may be a configuration in which there is no slinger and the lip portion of the sealing device slides on the outer peripheral surface of the female screw member, and the sealing device and the outer peripheral surface of the female screw member constitute a labyrinth seal. You may do it.

また、上記実施形態のころ軸受装置では、軸部材2が固定される一方、外筒部材1がワークロールと接触して回転する構成であったが、この発明では、内側軌道部材が回転部材である一方、外側軌道部材が、固定部材であっても良い。   In the roller bearing device of the above embodiment, the shaft member 2 is fixed, while the outer cylinder member 1 rotates in contact with the work roll. In the present invention, the inner race member is a rotating member. On the other hand, the outer race member may be a fixed member.

また、上記実施形態のころ軸受装置では、雌ねじ本体部41の内周面が、環状のOリング係合溝56を有する構成であったが、この発明では、環状のOリング係合溝は、雌ねじ部材の内周面およびこの雌ねじ部材の内周面に対向する内側軌道部材の外周面のうちの少なくとも一方に存在していれば良い。   Further, in the roller bearing device of the above embodiment, the inner peripheral surface of the female screw main body 41 has the annular O-ring engagement groove 56, but in the present invention, the annular O-ring engagement groove is It suffices to exist on at least one of the inner peripheral surface of the female screw member and the outer peripheral surface of the inner race member facing the inner peripheral surface of the female screw member.

また、この発明のころ軸受装置は、図3に雌ねじ部材179の周辺の拡大断面図を示す軸受装置であっても良い。   Further, the roller bearing device of the present invention may be a bearing device showing an enlarged sectional view of the periphery of the female screw member 179 in FIG.

すなわち、この発明のころ軸受装置は、図3に示すように、軸部材102の外径側の段部と、雌ねじ部材179の内径側の段部とが、当接しない構成であっても良く、雌ねじ部材179の軸方向のころ106側の端面(鍔面)190が、軸部材102の段部193およびころ106の端面194の両方に当接する構成であっても良い。   That is, as shown in FIG. 3, the roller bearing device of the present invention may have a configuration in which the stepped portion on the outer diameter side of the shaft member 102 and the stepped portion on the inner diameter side of the female screw member 179 do not contact each other. Further, the end surface (ridge surface) 190 on the roller 106 side in the axial direction of the female screw member 179 may be in contact with both the step portion 193 of the shaft member 102 and the end surface 194 of the roller 106.

また、この発明のころ軸受装置の雌ねじ部材179は、図3および図4(軸方向の外方側から雌ねじ部材179の一部を見たときの平面図)に示すように、回転トルク付与用の治具を挿入するための係合部として、上記実施形態の治具係合穴70(図2参照)の替わりに、雌ねじ部材179の外周面に径方向および軸方向に開口する治具係合用の切欠き170を有していても良い。   Further, the female screw member 179 of the roller bearing device of the present invention is provided with a rotational torque as shown in FIGS. 3 and 4 (plan view when a part of the female screw member 179 is viewed from the axially outer side). As an engaging portion for inserting the jig, a jig engaging with the outer peripheral surface of the female screw member 179 in the radial direction and the axial direction instead of the jig engaging hole 70 (see FIG. 2) of the above embodiment. It may have a notch 170 for use.

また、上記実施形態では、ころ軸受装置が、バックアップロールであったが、この発明のころ軸受装置は、上述のように、外側軌道部材が、固定部材である構成でも良く、バックアップロールでなくても良い。   Moreover, in the said embodiment, although the roller bearing apparatus was a backup roll, as above-mentioned, the structure where an outer track member is a fixed member may be sufficient as the roller bearing apparatus of this invention, and it is not a backup roll. Also good.

本発明の一実施形態のころ軸受装置であるバックアップロールの軸方向の断面図である。It is sectional drawing of the axial direction of the backup roll which is a roller bearing apparatus of one Embodiment of this invention. 上記バックアップロールの第2密封装置の周辺の軸方向の拡大断面図である。It is an expanded sectional view of the circumference of the circumference of the 2nd sealing device of the above-mentioned backup roll. 変形例のころ軸受装置の雌ねじ部材の周辺の拡大断面図である。It is an expanded sectional view of the periphery of the internal thread member of the roller bearing device of a modification. 変形例のころ軸受装置において、軸方向の外方側から雌ねじ部材の一部を見たときの平面図である。In the roller bearing device of a modification, it is a top view when a part of female thread member is seen from the outside of the direction of an axis.

1 外筒部材
2,102 軸部材
3,4,5,6,106 円筒ころ
11 第2密封装置
48 円筒内周面
49 円筒外周面
53 雄ねじ部
55 雌ねじ部
78 密封部材
79,179 雌ねじ部材
80 Oリング
81 雌ねじ部材の内周面の段部
90,190 雌ねじ部材の鍔面
91 軸部材の外周面の段部
93,194 円筒ころの端面
193 軸部材の段部
DESCRIPTION OF SYMBOLS 1 Outer cylinder member 2,102 Shaft member 3, 4, 5, 6, 106 Cylindrical roller 11 2nd sealing device 48 Cylindrical inner peripheral surface 49 Cylindrical outer peripheral surface 53 Male thread part 55 Female thread part 78 Sealing member 79,179 Female thread member 80 O Ring 81 Stepped portion on inner peripheral surface of female screw member 90,190 Ridge surface of female screw member 91 Stepped portion on outer peripheral surface of shaft member 93,194 End surface of cylindrical roller 193 Stepped portion of shaft member

Claims (4)

軌道面と雄ねじ部とを外周面に有する内側軌道部材と、
軌道面を内周面に有する外側軌道部材と、
上記内側軌道部材と上記外側軌道部材との間に配置されたころと、
上記内側軌道部材の軸方向の一端部と、上記外側軌道部材の軸方向の一端部との間を密封する環状の密封装置と
を備え、
上記密封装置は、
上記外側軌道部材に固定された環状の密封部材と、
上記内側軌道部材の上記雄ねじ部に螺合する雌ねじ部を有する内周面と、上記密封部材が摺動する摺動面とを有する環状の雌ねじ部材と
を有し、
上記雌ねじ部材の上記内周面において上記雌ねじ部よりも軸方向の外方に位置する部分と、上記内側軌道部材の上記外周面との間にOリングを備え
上記雌ねじ部材と、上記内側軌道部材との接合部の軸方向の外方側の端部が、外部に露出していることを特徴とするころ軸受装置。
An inner race member having a raceway surface and a male screw portion on the outer peripheral surface;
An outer race member having a raceway surface on the inner peripheral surface;
A roller disposed between the inner race member and the outer race member;
An annular sealing device that seals between one axial end of the inner race member and one axial end of the outer race member;
The sealing device is
An annular sealing member fixed to the outer race member;
An inner peripheral surface having an internal thread portion that is screwed into the external thread portion of the inner race member, and an annular internal thread member having a sliding surface on which the sealing member slides,
An O-ring is provided between a portion of the inner peripheral surface of the female screw member positioned axially outward from the female screw portion and the outer peripheral surface of the inner raceway member ;
And the female screw member, the end portion in the axial direction of the outer side of the joint between the inner raceway member, a bearing device roller characterized that you have exposed to the outside.
請求項1に記載のころ軸受装置において、
上記内側軌道部材の上記外周面および上記雌ねじ部材の上記内周面の夫々は、段部を有し、
上記内側軌道部材の上記段部と、上記雌ねじ部材の上記段部とは、当接していることを特徴とするころ軸受装置。
The roller bearing device according to claim 1,
Each of the outer peripheral surface of the inner race member and the inner peripheral surface of the female screw member has a stepped portion,
The roller bearing device, wherein the step portion of the inner race member and the step portion of the female screw member are in contact with each other.
請求項1または2に記載のころ軸受装置において、
上記雌ねじ部材は、上記ころの端面に摺接する鍔面を有することを特徴とするころ軸受装置。
In the roller bearing device according to claim 1 or 2,
The roller bearing device, wherein the female screw member has a flange surface that is in sliding contact with the end surface of the roller.
請求項1乃至3のいずれか1つに記載のころ軸受装置を備え、
上記ころ軸受装置の上記外側軌道部材は、回転自在の外筒部材であることを特徴とするバックアップロール。
A roller bearing device according to any one of claims 1 to 3,
The backup roll, wherein the outer race member of the roller bearing device is a rotatable outer cylinder member.
JP2008223525A 2008-09-01 2008-09-01 Roller bearing device and backup roll Expired - Fee Related JP5343456B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6052423U (en) * 1983-09-19 1985-04-12 川崎製鉄株式会社 bearing
JPH01144271U (en) * 1988-03-29 1989-10-03
JP2551738Y2 (en) * 1991-09-30 1997-10-27 光洋精工株式会社 Bearing device
JP4058568B2 (en) * 1998-05-19 2008-03-12 株式会社ジェイテクト Bearing device and method for assembling sealing member
JP2002235740A (en) * 2001-02-13 2002-08-23 Koyo Seiko Co Ltd Bearing structure
JP2007211820A (en) * 2006-02-07 2007-08-23 Nsk Ltd Ball screw supporting apparatus

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