JP2008095839A - Rolling bearing device and sealing device - Google Patents

Rolling bearing device and sealing device Download PDF

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Publication number
JP2008095839A
JP2008095839A JP2006278699A JP2006278699A JP2008095839A JP 2008095839 A JP2008095839 A JP 2008095839A JP 2006278699 A JP2006278699 A JP 2006278699A JP 2006278699 A JP2006278699 A JP 2006278699A JP 2008095839 A JP2008095839 A JP 2008095839A
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Prior art keywords
outer ring
ring
sealing device
rolling bearing
peripheral surface
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Japanese (ja)
Inventor
Ryohei Hosaka
亮平 保坂
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JTEKT Corp
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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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device capable of increasing a rated load. <P>SOLUTION: A first sealing device 13 including an outer fitting part 42 fitted and fixed on the outer circumferential surface of a third outer ring 3, an inner fitting part 44 fitted into the inner circumferential surface of the third outer ring 3, and a core metal part 40 having a contact part 45 connecting the outer fitting part 43 to the inner fitting part 44 and abutting on an axial end surface of the third outer ring 3 is set on an axial end part of the rolling bearing device. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、転がり軸受装置に関し、特に、圧延機のワークロールに使用されれば好適な転がり軸受装置に関する。また、本発明は、密封装置に関する。   The present invention relates to a rolling bearing device, and more particularly to a rolling bearing device suitable for use in a work roll of a rolling mill. The present invention also relates to a sealing device.

従来、転がり軸受装置としては、特開２００１−２４１４５５号公報（特許文献１）に記載されているものがある。   Conventionally, as a rolling bearing device, there is one described in Japanese Patent Laid-Open No. 2001-241455 (Patent Document 1).

この転がり軸受装置は、外輪、内輪、円錐ころおよび密封装置を備え、密封装置は、上記外輪と上記内輪との間の空間の軸方向の一方の側の開口を密封している。上記密封装置は、シールカバーと、シール部とで構成されている。上記シールカバーは、上記外輪の上記一方の側の端面に当接している。上記シール部は、シールカバーの内周面に固定されると共に、内輪の外周面に摺接している。   This rolling bearing device includes an outer ring, an inner ring, a tapered roller, and a sealing device, and the sealing device seals an opening on one side in the axial direction of a space between the outer ring and the inner ring. The sealing device includes a seal cover and a seal portion. The seal cover is in contact with the end surface on the one side of the outer ring. The seal portion is fixed to the inner peripheral surface of the seal cover and is in sliding contact with the outer peripheral surface of the inner ring.

上記シールカバーの外周面には、環状溝が形成され、その環状溝には、Ｏリングが嵌入されている。上記Ｏリングは、密封装置の外周側から軸受装置内部に水が浸入することを防止している。   An annular groove is formed on the outer peripheral surface of the seal cover, and an O-ring is fitted into the annular groove. The O-ring prevents water from entering the bearing device from the outer peripheral side of the sealing device.

このような背景において、圧延機のワークロールに使用される転がり軸受装置の定格荷重を大きくしたいという要請がある。
特開２００１−２４１４５５号公報（第１図） In such a background, there is a demand for increasing the rated load of a rolling bearing device used for a work roll of a rolling mill.
JP 2001-241455 A (FIG. 1)

そこで、この発明の課題は、定格荷重を大きくできる転がり軸受装置を提供することにある。また、本発明は、転がり軸受装置に配置されたとき、その転がり軸受装置の定格荷重を大きくできる密封装置を提供することにある。   Then, the subject of this invention is providing the rolling bearing apparatus which can enlarge a rated load. Moreover, this invention is providing the sealing device which can enlarge the rated load of the rolling bearing apparatus, when it arrange | positions to a rolling bearing apparatus.

この課題を解決するために、この発明の転がり軸受装置は、
軌道面を有する外輪と、
軌道面を有する内輪と、
上記外輪の軌道面と上記内輪の軌道面との間に配置された転動体と、
上記外輪の外周面に外嵌されて固定された外嵌部と、上記外輪の内周面に内嵌された内嵌部と、上記外嵌部と上記内嵌部との間を接続すると共に、上記外輪の軸方向の端面に当接する当接部とを有する芯金部と、上記芯金部に固定されると共に、上記内輪の外周面に摺動する弾性部とを有する密封装置と
を備えることを特徴としている。 In order to solve this problem, the rolling bearing device of the present invention is:
An outer ring having a raceway surface;
An inner ring having a raceway surface;
A rolling element disposed between the raceway surface of the outer ring and the raceway surface of the inner ring;
While connecting between the outer fitting part fitted and fixed to the outer peripheral surface of the outer ring, the inner fitting part fitted to the inner peripheral surface of the outer ring, and the outer fitting part and the inner fitting part A sealing device having a core part having an abutting part that comes into contact with an end face in the axial direction of the outer ring, and an elastic part fixed to the core part and sliding on the outer peripheral surface of the inner ring. It is characterized by providing.

本発明によれば、外輪の外周面に外嵌されて固定された外嵌部と、外輪の内周面に内嵌された内嵌部と、外嵌部と内嵌部との間を接続すると共に、外輪の軸方向の端面に当接する当接部とを有する芯金部を有する密封装置を使用しているから、シールカバーを使用する密封装置と比較して、密封装置の軸方向の長さを格段に小さくできる。したがって、密封装置の軸方向の長さを低減できる分、軌道輪の軸方向の長さを大きくできるから、転動体の軸方向の長さを大きくすることができて、転動体の容量を大きくでき、転がり軸受装置の定格荷重を大きくすることができる。   According to the present invention, the outer fitting portion that is fitted and fixed to the outer circumferential surface of the outer ring, the inner fitting portion that is fitted to the inner circumferential surface of the outer ring, and the outer fitting portion and the inner fitting portion are connected. In addition, since the sealing device having the cored bar portion having the abutting portion that contacts the axial end surface of the outer ring is used, the sealing device in the axial direction of the sealing device is compared with the sealing device using the seal cover. The length can be significantly reduced. Therefore, since the axial length of the bearing ring can be increased by the amount that the axial length of the sealing device can be reduced, the axial length of the rolling element can be increased, and the capacity of the rolling element can be increased. The rated load of the rolling bearing device can be increased.

また、本発明によれば、外輪の端面に沿って略径方向に略直線状に延在する当接部を有すると共に、当接部とつながる外嵌部および内嵌部を有しているから、芯金部が略径方向に略直線状に延在しない構成と比較して、密封装置の剛性を、優れたものにすることができる。   In addition, according to the present invention, since the contact portion extends substantially linearly in the radial direction along the end surface of the outer ring, the outer fit portion and the inner fit portion connected to the contact portion are provided. The rigidity of the sealing device can be improved as compared with a configuration in which the cored bar portion does not extend substantially linearly in the substantially radial direction.

また、本発明によれば、外嵌部が、外輪の外周面に外嵌されて固定されると共に、内嵌部が、外輪の内周面に内嵌されている構成であって、芯金部が、外輪の外周面と外輪の内周面の両方を抱く構成であるから、芯金部を、外輪に確実に固定できる。   According to the present invention, the outer fitting portion is fitted and fixed to the outer circumferential surface of the outer ring, and the inner fitting portion is fitted to the inner circumferential surface of the outer ring, Since the portion is configured to hold both the outer peripheral surface of the outer ring and the inner peripheral surface of the outer ring, the cored bar portion can be reliably fixed to the outer ring.

また、本発明によれば、芯金部が外輪の内周面に内嵌された内嵌部を有するから、弾性部の軸方向の振れの支点を、内嵌部付近に位置させることができ、内嵌部を有さない構成と比較して、弾性部の軸方向の振れの支点の位置を径方向の内方に移動させることができる。したがって、内嵌部を有さない構成と比較して、弾性部の軸方向の振れを小さくすることができて、弾性部の密封性能を優れたものにすることができる。   Further, according to the present invention, since the cored bar portion has the inner fitting portion fitted into the inner peripheral surface of the outer ring, the fulcrum of axial deflection of the elastic portion can be positioned near the inner fitting portion. Compared with the configuration having no internal fitting portion, the position of the fulcrum of axial deflection of the elastic portion can be moved inward in the radial direction. Therefore, as compared with a configuration having no internal fitting portion, the axial deflection of the elastic portion can be reduced, and the sealing performance of the elastic portion can be improved.

また、本発明によれば、シールカバーを省略できて、部品点数を削減することができる。したがって、密封装置の製造工数および組立工数を、少なくできて、転がり軸受装置の製造コストを低減できる。   Moreover, according to the present invention, the seal cover can be omitted, and the number of parts can be reduced. Therefore, the manufacturing man-hours and assembly man-hours of the sealing device can be reduced, and the manufacturing cost of the rolling bearing device can be reduced.

また、一実施形態の転がり軸受装置は、上記密封装置は、上記外嵌部の外周面に固定された環状の弾性部材を有している。   In the rolling bearing device according to an embodiment, the sealing device has an annular elastic member fixed to the outer peripheral surface of the outer fitting portion.

上記実施形態によれば、外嵌部の外周面に、環状の弾性部材が配置されているから、密封装置にOリングの働きを兼用させることができる。   According to the above embodiment, since the annular elastic member is disposed on the outer peripheral surface of the outer fitting portion, the sealing device can also function as an O-ring.

また、環状の弾性部材は、外輪の外周面に外嵌されて固定された外嵌部に固定されているから、弾性部材の軸方向の位置が変動することがなくて、弾性部材の位置決めを正確に行うことができる。したがって、この弾性部材で、芯金部の外周側から水や油が浸入することを確実に防止できる。   Further, since the annular elastic member is fixed to the outer fitting portion that is fixedly fitted to the outer peripheral surface of the outer ring, the position of the elastic member in the axial direction does not fluctuate and the elastic member is positioned. Can be done accurately. Therefore, this elastic member can reliably prevent water and oil from entering from the outer peripheral side of the cored bar.

また、本発明の密封装置は、
外輪の外周面に外嵌されて固定される外嵌部と、上記外輪の内周面に内嵌される内嵌部と、上記外嵌部と上記内嵌部との間を接続すると共に、上記外輪の軸方向の端面に当接する当接部とを有する芯金部と、
上記芯金部に固定されると共に、内輪の外周面に摺動する弾性部と
を有することを特徴としている。 Moreover, the sealing device of the present invention comprises:
While connecting the outer fitting portion that is fitted and fixed to the outer circumferential surface of the outer ring, the inner fitting portion that is fitted to the inner circumferential surface of the outer ring, and the outer fitting portion and the inner fitting portion, A cored bar portion having a contact portion that contacts the axial end surface of the outer ring;
It has an elastic part which is fixed to the core metal part and slides on the outer peripheral surface of the inner ring.

本発明によれば、この発明の密封装置を有する転がり軸受装置の定格荷重を大きくすることができると共に、製造コストを小さくすることができる。   According to the present invention, the rated load of the rolling bearing device having the sealing device of the present invention can be increased, and the manufacturing cost can be reduced.

また、一実施形態の密封装置は、上記外嵌部の外周面に固定された環状の弾性部材を有している。   Moreover, the sealing device of one Embodiment has the cyclic | annular elastic member fixed to the outer peripheral surface of the said external fitting part.

上記実施形態によれば、芯金部の外周側から水や油が浸入することを確実に防止することができる。   According to the said embodiment, it can prevent reliably that water and oil penetrate | invade from the outer peripheral side of a metal core part.

本発明の転がり軸受装置によれば、定格荷重を大きくできると共に、製造コストを低減することができる。また、本発明の密封装置によれば、この発明を有する転がり軸受装置の定格荷重を大きくすることができると共に、製造コストを小さくすることができる。   According to the rolling bearing device of the present invention, the rated load can be increased and the manufacturing cost can be reduced. Moreover, according to the sealing device of the present invention, the rated load of the rolling bearing device having the present invention can be increased, and the manufacturing cost can be reduced.

以下、この発明を図示の形態の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、この発明の一実施形態の転がり軸受装置の軸方向の断面図である。   FIG. 1 is an axial sectional view of a rolling bearing device according to an embodiment of the present invention.

この転がり軸受装置は、圧延機のワークロールのロールネックに配置されている。詳しくは、この転がり軸受装置は、圧延機のワークロールのロールネックの軸部（図示せず）と、筒状のハウジング（図示せず）との間に配置されている。   This rolling bearing device is arranged at a roll neck of a work roll of a rolling mill. Specifically, this rolling bearing device is disposed between a shaft (not shown) of a roll neck of a work roll of a rolling mill and a cylindrical housing (not shown).

この転がり軸受装置は、第１外輪１、第２外輪２、第３外輪３、第１内輪５、第２内輪６、第１円錐ころ８、第２円錐ころ９、第３円錐ころ１０、第４円錐ころ１１、本発明の密封装置の一実施形態の第１密封装置１３、および、本発明の密封装置の一実施形態の第２密封装置１４を備える。   The rolling bearing device includes a first outer ring 1, a second outer ring 2, a third outer ring 3, a first inner ring 5, a second inner ring 6, a first tapered roller 8, a second tapered roller 9, a third tapered roller 10, A four tapered roller 11, a first sealing device 13 of an embodiment of the sealing device of the present invention, and a second sealing device 14 of an embodiment of the sealing device of the present invention are provided.

上記第１外輪１は、軸方向に隣接する２つの円錐軌道面を有している一方、第２外輪２および第３外輪３の夫々は、一つの円錐軌道面を有している。また、上記第１外輪１と第２外輪２との軸方向の間には、外輪間座２０が配置される一方、第１外輪１と第３外輪３との軸方向の間には、外輪間座２１が配置されている。上記第１乃至第３外輪１,２,３は、筒状のハウジング（図示せず）の内周面に隙間嵌めされている。   The first outer ring 1 has two conical raceway surfaces adjacent in the axial direction, whereas each of the second outer ring 2 and the third outer ring 3 has one conical raceway surface. An outer ring spacer 20 is disposed between the first outer ring 1 and the second outer ring 2 in the axial direction, while an outer ring is interposed between the first outer ring 1 and the third outer ring 3 in the axial direction. A spacer 21 is arranged. The first to third outer rings 1, 2, and 3 are fitted into the inner peripheral surface of a cylindrical housing (not shown).

一方、上記第１内輪５および第２内輪６の夫々は、軸方向に隣接する２つの円錐軌道面を有している。上記第１内輪５および第２内輪６の夫々は、ワークロールの軸部のロールネックの外周面に隙間嵌めされている。第１内輪５と第２内輪６とは、軸方向に突き合わされており、軸方向に互いに当接している。   On the other hand, each of the first inner ring 5 and the second inner ring 6 has two conical track surfaces adjacent in the axial direction. Each of the first inner ring 5 and the second inner ring 6 is fitted with a clearance on the outer peripheral surface of the roll neck of the shaft portion of the work roll. The first inner ring 5 and the second inner ring 6 are abutted in the axial direction and are in contact with each other in the axial direction.

上記第１円錐ころ８は、第２外輪２の円錐軌道面と、第１内輪５の一方の円錐軌道面との間に、保持器２２に保持された状態で、周方向に所定の間隔を隔てられて複数配置されている。上記第２円錐ころ９は、第１外輪１の一方の円錐軌道面と、第１内輪５の他方の円錐軌道面との間に、保持器２３に保持された状態で、周方向に所定の間隔を隔てられて複数配置されている。上記第３円錐ころ１０は、第１外輪１の他方の円錐軌道面と、第２内輪６の一方の円錐軌道面との間に、保持器２４に保持された状態で、周方向に所定の間隔を隔てられて複数配置されている。上記第４円錐ころ１１は、第３外輪３の円錐軌道面と、第２内輪６の他方の円錐軌道面との間に、保持器２５に保持された状態で、周方向に所定の間隔を隔てられて複数配置されている。   The first tapered roller 8 has a predetermined interval in the circumferential direction while being held by the cage 22 between the conical raceway surface of the second outer ring 2 and one conical raceway surface of the first inner ring 5. A plurality are arranged apart. The second tapered roller 9 has a predetermined circumferential direction while being held by a cage 23 between one conical raceway surface of the first outer ring 1 and the other conical raceway surface of the first inner ring 5. A plurality are arranged at intervals. The third tapered roller 10 has a predetermined circumferential direction while being held by a cage 24 between the other conical raceway surface of the first outer ring 1 and one conical raceway surface of the second inner ring 6. A plurality are arranged at intervals. The fourth tapered roller 11 has a predetermined interval in the circumferential direction while being held by the cage 25 between the conical raceway surface of the third outer ring 3 and the other conical raceway surface of the second inner ring 6. A plurality are arranged apart.

上記第１密封装置１３は、転がり軸受装置の軸方向の他方の側の端部に配置されている。上記第１密封装置１３は、第３外輪３と第２内輪６との間の軸方向の上記一方の側の開口を密封している。上記第２密封装置１４は、転がり軸受装置の軸方向の他方の側の端部に配置されている。上記第２密封装置１４は、第２外輪２と第１内輪５との間の軸方向の上記一方の側の開口を密封している。   The said 1st sealing device 13 is arrange | positioned at the edge part of the other side of the axial direction of a rolling bearing apparatus. The first sealing device 13 seals the opening on the one side in the axial direction between the third outer ring 3 and the second inner ring 6. The said 2nd sealing device 14 is arrange | positioned at the edge part of the other side of the axial direction of a rolling bearing apparatus. The second sealing device 14 seals the opening on the one side in the axial direction between the second outer ring 2 and the first inner ring 5.

図２は、図１における第１密封装置１３付近の拡大断面図である。尚、第２密封装置１４は、第１密封装置１３と同一な構成を有している。第２密封装置１４についての説明は省略する。   FIG. 2 is an enlarged cross-sectional view of the vicinity of the first sealing device 13 in FIG. The second sealing device 14 has the same configuration as the first sealing device 13. Description of the second sealing device 14 is omitted.

第１密封装置は、芯金部４０および弾性部４１を有し、上記芯金部４０は、略ヨ字状の形状を有し、外嵌部４３、内嵌部４４および当接部４５を有する。上記外嵌部４３は、第３外輪３の外周面に外嵌されて固定されている。詳しくは、上記外嵌部４３は、筒状の形状を有し、略軸方向に延在している。外嵌部４３の先端部には、径方向の内方に突出する環状の突起４７が形成されている。この突起４７は、第３外輪３の外周面の端部に形成されている環状の嵌合溝５０に嵌りこんでいる。このようにして、外嵌部４３が、第３外輪３の外周面に外嵌されて固定されている。また、上記内嵌部４４は、第３外輪３の内周面に内嵌されて、第３外輪３に嵌め込まれている。当接部４５は、外嵌部４３と内嵌部４４との間を接続している。上記当接部４５は、第３外輪３の軸方向の端面に隙間なく当接している。このようにして、芯金部４０を、第３外輪３に確実に固定している。   The first sealing device includes a cored bar part 40 and an elastic part 41. The cored bar part 40 has a substantially Y-shaped shape, and includes an outer fitting part 43, an inner fitting part 44, and a contact part 45. Have. The outer fitting portion 43 is fitted and fixed to the outer peripheral surface of the third outer ring 3. Specifically, the outer fitting portion 43 has a cylindrical shape and extends substantially in the axial direction. An annular protrusion 47 that protrudes inward in the radial direction is formed at the tip of the outer fitting part 43. The protrusion 47 is fitted in an annular fitting groove 50 formed at the end of the outer peripheral surface of the third outer ring 3. In this way, the outer fitting portion 43 is fitted and fixed to the outer peripheral surface of the third outer ring 3. The inner fitting portion 44 is fitted into the inner peripheral surface of the third outer ring 3 and is fitted into the third outer ring 3. The contact portion 45 connects between the outer fitting portion 43 and the inner fitting portion 44. The contact portion 45 is in contact with the axial end surface of the third outer ring 3 without a gap. In this way, the cored bar portion 40 is securely fixed to the third outer ring 3.

上記弾性部４１は、芯金部４０の径方向の内方の端部に焼付きにより固着されている。上記弾性部４１は、第２内輪６の外周面に摺接するリップ部５２を有している。リップ部５２の外周面には、環状溝が形成されている。この環状溝には、ガータスプリング（弾性金属環）５３が嵌入されている。ガータスプリング５３は、リップ部５２を径方向の内方に押圧する役割を果たしている。このようにして、芯金部４０と弾性部４１とで第３外輪３と第２内輪６との間の空間の軸方向の一方の側の開口を密封している。   The elastic part 41 is fixed to the radially inner end of the cored bar part 40 by seizure. The elastic portion 41 has a lip portion 52 that is in sliding contact with the outer peripheral surface of the second inner ring 6. An annular groove is formed on the outer peripheral surface of the lip portion 52. A garter spring (elastic metal ring) 53 is fitted in the annular groove. The garter spring 53 plays a role of pressing the lip portion 52 inward in the radial direction. In this way, the opening on one side in the axial direction of the space between the third outer ring 3 and the second inner ring 6 is sealed by the cored bar portion 40 and the elastic portion 41.

また、上記外嵌部４３の外周面には、環状の弾性部材５４が焼付けにより固着されている。この弾性部材５４は、図示しないハウジングの内周面に環状に接触することで第１密封装置１３の外周側から冷却水や圧延油が軸受装置内に浸入することを防止する役割を果たしている。   An annular elastic member 54 is fixed to the outer peripheral surface of the outer fitting portion 43 by baking. The elastic member 54 plays a role of preventing cooling water and rolling oil from entering the bearing device from the outer peripheral side of the first sealing device 13 by annularly contacting an inner peripheral surface of a housing (not shown).

上記芯金部４０の径方向の内方の端部は、軸方向の内方に屈曲している。円錐ころ１１を保持する保持器の軸方向の外方の端部は、芯金部４０の径方向の内方の端部と径方向に重なっている。このようにして、円錐ころ１１の軸方向の寸法を、大きくして、円錐ころ１１の容量を大きくしている。尚、保持器の軸方向の端部に位置する保持器の円錐形状でない部分の全部が、芯金部４０の径方向の内方の端部における軸方向の内方の端面よりも軸方向の外方に位置するようにすると、円錐ころの容量を格段に大きくすることができる。   An inner end portion in the radial direction of the cored bar portion 40 is bent inward in the axial direction. The axially outer end of the cage that holds the tapered roller 11 overlaps the radial inner end of the cored bar 40 in the radial direction. In this manner, the axial dimension of the tapered roller 11 is increased, and the capacity of the tapered roller 11 is increased. Note that all of the non-conical portions of the cage located at the axial end of the cage are axially more inward than the axially inner end face at the radially inner end of the cored bar 40. If it is located outside, the capacity of the tapered roller can be significantly increased.

尚、図２において、参照番号５５は、シムを示している。シム５５は、厚さを調整することでハウジングに固定される図示しない軸方向位置決め部材との間で転がり軸受装置の軸方向の位置を調整する役割を担っている。   In FIG. 2, reference numeral 55 indicates a shim. The shim 55 plays a role of adjusting the axial position of the rolling bearing device with an axial positioning member (not shown) fixed to the housing by adjusting the thickness.

上記実施形態の転がり軸受装置によれば、第３外輪３の外周面に外嵌されて固定された外嵌部４３と、第３外輪３の内周面に内嵌された内嵌部４４と、外嵌部４３と内嵌部４４との間を接続すると共に、第３外輪３の軸方向の端面に当接する当接部４５とを有する芯金部４０を有する第１密封装置１３を使用しているから、シールカバーを使用する密封装置と比較して、第１密封装置１３の軸方向の長さを格段に小さくできる。したがって、第１密封装置１３の軸方向の長さを低減できる分、軌道輪１,２,３,５,６の軸方向の長さを大きくできるから、円錐ころ８,９,１０,１１の軸方向の長さを大きくすることができて、円錐ころ８,９,１０,１１の容量を大きくでき、転がり軸受装置の定格荷重を大きくすることができる。   According to the rolling bearing device of the above embodiment, the outer fitting portion 43 that is fitted and fixed to the outer circumferential surface of the third outer ring 3, and the inner fitting portion 44 that is fitted to the inner circumferential surface of the third outer ring 3, The first sealing device 13 having a cored bar portion 40 that connects the outer fitting portion 43 and the inner fitting portion 44 and has an abutting portion 45 that abuts against an axial end surface of the third outer ring 3 is used. Therefore, the axial length of the first sealing device 13 can be remarkably reduced as compared with the sealing device using the seal cover. Accordingly, since the axial length of the race rings 1, 2, 3, 5, 6 can be increased by the amount that the axial length of the first sealing device 13 can be reduced, the tapered rollers 8, 9, 10, 11 The axial length can be increased, the capacities of the tapered rollers 8, 9, 10, 11 can be increased, and the rated load of the rolling bearing device can be increased.

また、上記実施形態の転がり軸受装置によれば、第３外輪３に沿って芯金部４０が略径方向に略直線状に延在する当接部４５を有すると共に、当接部４５につながる外嵌部４３および内嵌部４４を有しているから、芯金部４０が略径方向に略直線状に延在しない構成と比較して、密封装置の剛性を、優れたものにすることができる。   Further, according to the rolling bearing device of the above embodiment, the cored bar part 40 has the contact part 45 extending substantially linearly in the radial direction along the third outer ring 3 and is connected to the contact part 45. Since the outer fitting portion 43 and the inner fitting portion 44 are provided, the rigidity of the sealing device is made superior as compared with a configuration in which the cored bar portion 40 does not extend substantially linearly in the radial direction. Can do.

また、上記実施形態の転がり軸受装置によれば、外嵌部４３が、第３外輪３の外周面に外嵌されて固定されると共に、内嵌部４４が、第３外輪３の内周面に内嵌される構成であって、芯金部４０が、第３外輪３の外周面と第３外輪３の内周面の両方を抱く構成であるから、芯金部４０を、第３外輪３に確実に固定することができる。   Further, according to the rolling bearing device of the above embodiment, the outer fitting portion 43 is fitted and fixed to the outer peripheral surface of the third outer ring 3, and the inner fitting portion 44 is fixed to the inner peripheral surface of the third outer ring 3. Since the cored bar portion 40 is configured to hold both the outer peripheral surface of the third outer ring 3 and the inner peripheral surface of the third outer ring 3, the cored bar portion 40 is connected to the third outer ring. 3 can be securely fixed.

また、上記実施形態の転がり軸受装置によれば、芯金部４０が第３外輪３の内周面に内嵌された内嵌部４４を有するから、弾性４１部の軸方向の振れの支点を、内嵌部４４付近に位置させることができて、内嵌部を有さない構成と比較して、弾性部４１の軸方向の振れの支点の位置を径方向の内方に移動させることができる。したがって、内嵌部を有さない構成と比較して、弾性部４１の軸方向の振れを小さくすることができて、弾性部４１の密封性能を優れたものにすることができる。   Further, according to the rolling bearing device of the above embodiment, since the cored bar part 40 has the inner fitting part 44 fitted into the inner peripheral surface of the third outer ring 3, the fulcrum for the axial deflection of the elastic 41 part is provided. The position of the fulcrum of the axial deflection of the elastic portion 41 can be moved inward in the radial direction as compared with a configuration that can be positioned near the inner fitting portion 44 and does not have the inner fitting portion. it can. Therefore, compared with the structure which does not have an internal fitting part, the deflection | deviation of the axial direction of the elastic part 41 can be made small, and the sealing performance of the elastic part 41 can be made excellent.

また、上記実施形態の転がり軸受装置によれば、シールカバーを省略できて、部品点数を削減することができる。したがって、第１密封装置１３の製造工数および組立工数を、少なくできて、転がり軸受装置の製造コストを低減できる。   Moreover, according to the rolling bearing apparatus of the said embodiment, a seal cover can be abbreviate | omitted and a number of parts can be reduced. Therefore, the manufacturing man-hours and assembly man-hours of the first sealing device 13 can be reduced, and the manufacturing cost of the rolling bearing device can be reduced.

また、上記実施形態の転がり軸受装置によれば、外嵌部４３の外周面に、環状の弾性部材５４が配置されているから、第１密封装置１３にOリングの働きを兼用させることができる。   Moreover, according to the rolling bearing apparatus of the said embodiment, since the cyclic | annular elastic member 54 is arrange | positioned on the outer peripheral surface of the external fitting part 43, the function of an O-ring can be combined with the 1st sealing device 13. .

また、環状の弾性部材５４は、第３外輪３の外周面に外嵌されて固定された外嵌部４３に固定されているから、弾性部材５４の軸方向の位置が変動することがなくて、弾性部材５４の位置決めを正確に行うことができる。したがって、この弾性部材５４で、芯金部４０の外周側から冷却水や圧延油が浸入することを確実に防止できる。   Further, since the annular elastic member 54 is fixed to the outer fitting portion 43 that is fitted and fixed to the outer peripheral surface of the third outer ring 3, the position of the elastic member 54 in the axial direction does not vary. Therefore, the elastic member 54 can be accurately positioned. Therefore, the elastic member 54 can reliably prevent the cooling water and rolling oil from entering from the outer peripheral side of the cored bar 40.

また、上記実施形態の第１密封装置１３によれば、第１密封装置１３を有する転がり軸受装置の定格荷重を大きくすることができると共に、製造コストを小さくすることができる。また、芯金部４０の外周側から圧延材を冷却する冷却水や圧延油が浸入することを確実に防止することができる。   Moreover, according to the 1st sealing device 13 of the said embodiment, while being able to enlarge the rated load of the rolling bearing apparatus which has the 1st sealing device 13, manufacturing cost can be made small. Moreover, it can prevent reliably that the cooling water and rolling oil which cool a rolling material from the outer peripheral side of the metal core part 40 permeate.

尚、上記実施形態の転がり軸受装置では、転動体が、円錐ころ８,９,１０,１１であったが、この発明では、転動体は、円筒ころや玉であっても良い。また、転動体は、円錐ころ、円筒ころおよび玉のうちの２つ以上であっても良い。また、上記実施形態の転がり軸受装置では、軸方向の両端部に本発明の密封装置１３,１４が配置されていたが、この発明では、軸方向の一方の端部のみに本発明の密封装置が配置されていても良い。   In the rolling bearing device of the above embodiment, the rolling elements are tapered rollers 8, 9, 10, and 11. However, in this invention, the rolling elements may be cylindrical rollers or balls. Further, the rolling elements may be two or more of tapered rollers, cylindrical rollers, and balls. In the rolling bearing device of the above embodiment, the sealing devices 13 and 14 of the present invention are arranged at both ends in the axial direction. However, according to the present invention, the sealing device of the present invention is provided only at one end in the axial direction. May be arranged.

本発明の一実施形態の転がり軸受装置の軸方向の断面図である。It is sectional drawing of the axial direction of the rolling bearing apparatus of one Embodiment of this invention. 図１における第１密封装置付近の拡大断面図である。It is an expanded sectional view of the 1st sealing device vicinity in FIG.

符号の説明Explanation of symbols

３ 第３外輪
６ 第２内輪
１１ 円錐ころ
４０ 芯金部
４１ 弾性部
４３ 外嵌部
４４ 内嵌部
４５ 当接部
５４ 弾性部材 DESCRIPTION OF SYMBOLS 3 3rd outer ring 6 2nd inner ring 11 Tapered roller 40 Core metal part 41 Elastic part 43 Outer fitting part 44 Inner fitting part 45 Contact part 54 Elastic member

Claims (4)

軌道面を有する外輪と、
軌道面を有する内輪と、
上記外輪の軌道面と上記内輪の軌道面との間に配置された転動体と、
上記外輪の外周面に外嵌されて固定された外嵌部と、上記外輪の内周面に内嵌された内嵌部と、上記外嵌部と上記内嵌部との間を接続すると共に、上記外輪の軸方向の端面に当接する当接部とを有する芯金部と、上記芯金部に固定されると共に、上記内輪の外周面に摺動する弾性部とを有する密封装置と
を備えることを特徴とする転がり軸受装置。 An outer ring having a raceway surface;
An inner ring having a raceway surface;
A rolling element disposed between the raceway surface of the outer ring and the raceway surface of the inner ring;
While connecting between the outer fitting part fitted and fixed to the outer peripheral surface of the outer ring, the inner fitting part fitted to the inner peripheral surface of the outer ring, and the outer fitting part and the inner fitting part A sealing device having a core part having an abutting part that comes into contact with an end face in the axial direction of the outer ring, and an elastic part fixed to the core part and sliding on the outer peripheral surface of the inner ring. A rolling bearing device comprising: 請求項１に記載の転がり軸受装置において、
上記密封装置は、上記外嵌部の外周面に固定された環状の弾性部材を有していることを特徴とする転がり軸受装置。 The rolling bearing device according to claim 1,
The rolling bearing device according to claim 1, wherein the sealing device includes an annular elastic member fixed to the outer peripheral surface of the outer fitting portion. 外輪の外周面に外嵌されて固定される外嵌部と、上記外輪の内周面に内嵌される内嵌部と、上記外嵌部と上記内嵌部との間を接続すると共に、上記外輪の軸方向の端面に当接する当接部とを有する芯金部と、
上記芯金部に固定されると共に、内輪の外周面に摺動する弾性部と
を有することを特徴とする密封装置。 While connecting the outer fitting portion that is fitted and fixed to the outer circumferential surface of the outer ring, the inner fitting portion that is fitted to the inner circumferential surface of the outer ring, and the outer fitting portion and the inner fitting portion, A cored bar portion having a contact portion that contacts the axial end surface of the outer ring;
A sealing device having an elastic portion that is fixed to the core metal portion and slides on the outer peripheral surface of the inner ring. 請求項３に記載の密封装置において、
上記外嵌部の外周面に固定された環状の弾性部材を有していることを特徴とする密封装置。 The sealing device according to claim 3.
A sealing device comprising an annular elastic member fixed to the outer peripheral surface of the outer fitting portion.
JP2006278699A 2006-10-12 2006-10-12 Rolling bearing device and sealing device Pending JP2008095839A (en)

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JPS56150625A (en) * 1980-03-29 1981-11-21 Skf Kugellagerfabriken Gmbh Sealing device of bearing
JPH02286914A (en) * 1989-04-20 1990-11-27 Torrington Co:The Friction reducing bearing with sealing device
JPH0656521U (en) * 1993-01-19 1994-08-05 光洋精工株式会社 Energizing bearing
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WO2012127935A1 (en) * 2011-03-22 2012-09-27 カヤバ工業株式会社 Power steering device
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