JP2007051669A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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JP2007051669A
JP2007051669A JP2005236821A JP2005236821A JP2007051669A JP 2007051669 A JP2007051669 A JP 2007051669A JP 2005236821 A JP2005236821 A JP 2005236821A JP 2005236821 A JP2005236821 A JP 2005236821A JP 2007051669 A JP2007051669 A JP 2007051669A
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outer ring
pair
outer rings
bearing
rolling
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Japanese (ja)
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Takeshi Osumi
毅 大隅
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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
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • 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
    • F16C19/385—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 two rows, i.e. double-row tapered roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • F16C25/08—Ball or roller bearings self-adjusting
    • F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/12—Rolling apparatus, e.g. rolling stands, rolls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Support Of The Bearing (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing capable of incorporating a pre-load generating mechanism in a bearing, and integrally handling outer rings without separation. <P>SOLUTION: An outer ring spacer 20 is externally fitted to an outer diameter side of a pair of outer rings 3, 3, and recessed step portions 3b, 3b are formed on both end portions of the outer rings 3, 3. The outer ring spacer 20 comprises a central projecting portion 21 positioned between the pair of outer rings 3, 3, and a pair of hook-shaped locking portions 22, 22 locked on the recessed step portions 3b, 3b at both side of the outer rings 3, 3. The locking portions 22 of the outer ring spacer 20 are provided with through holes 24, and the plurality of through holes 24 are formed in the circumferential direction. Coil springs 30 are inserted in the through holes 24, and sealed by set screws 31, and proper pre-load is applied to the pair of outer rings 3, 3 by energizing force of the coil springs 30. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、鉄鋼設備、圧延機等に使用されるロールネック軸受に関し、熱間圧延機、冷間圧延機のバックアップロール（稀にワークロールや中間ロール）に好適に使用される主にスラスト荷重受け複列円錐ころ軸受である転がり軸受に関する。   TECHNICAL FIELD The present invention relates to a roll neck bearing used in steel facilities, rolling mills, etc., and mainly used as a thrust load for hot rolling mills and backup rolls of cold rolling mills (rarely work rolls and intermediate rolls). The present invention relates to a rolling bearing which is a receiving double row tapered roller bearing.

転動体が複列に配設された複列転がり軸受の一例である複列円錐ころ軸受は、ラジアル荷重とアキシアル荷重を負荷することができるので、鉄鋼設備の圧延機のロールを支持する転がり軸受として用いられることが多い。   A double row tapered roller bearing, which is an example of a double row rolling bearing in which rolling elements are arranged in a double row, is capable of carrying a radial load and an axial load, and is therefore a rolling bearing that supports the roll of a rolling mill in a steel facility. Often used as

また、二つ割れ間座を用いて、複列の軸受を不分離にする構造は、特許文献１に開示してある。   Further, Patent Document 1 discloses a structure in which double row bearings are not separated by using a two-split spacer.

図５は、従来例に係る２列円錐ころ軸受の縦断面図である。２列円錐ころ軸受１は、内輪２と、外輪３と、複数の転動体４とから構成されている。内輪２の外周面には、２列の内輪軌道面２ａが形成されている。２列円錐ころ軸受１は、２個の外輪３を備え、夫々の外輪３の内周面に外輪軌道面３ａが形成されている。内輪軌道面２ａと外輪軌道面３ａの間には、複数の転動体４が円周方向に２列に整列され、転動自在に配設されている。複数の転動体４は、例えば鋼板の打抜き保持器５によって回転自在に保持されている。   FIG. 5 is a longitudinal sectional view of a two-row tapered roller bearing according to a conventional example. The two-row tapered roller bearing 1 includes an inner ring 2, an outer ring 3, and a plurality of rolling elements 4. Two rows of inner ring raceway surfaces 2 a are formed on the outer circumferential surface of the inner ring 2. The two-row tapered roller bearing 1 includes two outer rings 3, and an outer ring raceway surface 3 a is formed on the inner peripheral surface of each outer ring 3. Between the inner ring raceway surface 2a and the outer ring raceway surface 3a, a plurality of rolling elements 4 are arranged in two rows in the circumferential direction, and are arranged to freely roll. The plurality of rolling elements 4 are rotatably held by, for example, a steel plate punching cage 5.

さらに、従来の軸受は、軸受には、予圧機構を持っておらず、軸受回りに予圧機能構造が必要であり、軸受に予圧を加える為、間座に組み込まれたバネの付勢力による予圧発生機構が設けられている。   Furthermore, the conventional bearing does not have a preload mechanism, and a preload function structure is required around the bearing. Preload is generated by the biasing force of the spring built into the spacer to apply preload to the bearing. A mechanism is provided.

すなわち、図５の従来例では、一対の外輪３，３の外径側に、一対の外嵌部材６ａ，６ｂが外嵌してあり、その両側の係止部７ａ，７ｂにより、一対の外輪３，３の両端部が係止してある。さらに、一方の外嵌部材６ａには、コイルバネ８が装着してあり、このコイルバネ８の付勢力により、一対の外輪３，３に適切な予圧荷重を与えるようになっている。   That is, in the conventional example of FIG. 5, a pair of outer fitting members 6a and 6b are fitted on the outer diameter side of the pair of outer rings 3 and 3, and the pair of outer rings are formed by the locking portions 7a and 7b on both sides thereof. Both ends of 3 and 3 are locked. Further, a coil spring 8 is attached to one outer fitting member 6a, and an appropriate preload is applied to the pair of outer rings 3 and 3 by the urging force of the coil spring 8.

次に、図６は、他の従来例に係る２列円錐ころ軸受の縦断面図である。図７は、２列円錐ころ軸受で、内輪、転動体や保持器と、外輪とを分離した状態の縦断面図である。図８は、２列円錐ころ軸受を組み込む状態を示す縦断面図である。   Next, FIG. 6 is a longitudinal sectional view of a two-row tapered roller bearing according to another conventional example. FIG. 7 is a longitudinal sectional view showing a state where the inner ring, the rolling elements and the cage, and the outer ring are separated from each other in the double row tapered roller bearing. FIG. 8 is a longitudinal sectional view showing a state in which the double row tapered roller bearing is assembled.

図６に於いて、２列円錐ころ軸受１は、内輪２と、外輪３と、複数の転動体４とから構成されている。内輪２の外周面には、２列の内輪軌道面２ａが形成されている。２列円錐ころ軸受１は、２個の外輪３を備え、夫々の外輪３の内周面に外輪軌道面３ａが形成されている。内輪軌道面２ａと外輪軌道面３ａの間には、複数の転動体４が円周方向に２列に整列され、転動自在に配設されている。複数の転動体４は、保持器５によって回転自在に保持されている。   In FIG. 6, the two-row tapered roller bearing 1 includes an inner ring 2, an outer ring 3, and a plurality of rolling elements 4. Two rows of inner ring raceway surfaces 2 a are formed on the outer circumferential surface of the inner ring 2. The two-row tapered roller bearing 1 includes two outer rings 3, and an outer ring raceway surface 3 a is formed on the inner peripheral surface of each outer ring 3. Between the inner ring raceway surface 2a and the outer ring raceway surface 3a, a plurality of rolling elements 4 are arranged in two rows in the circumferential direction, and are arranged to freely roll. The plurality of rolling elements 4 are rotatably held by a cage 5.

また、一対の外輪３，３の両側には、一対の端部リング部材９，９が装着してある。一対の外輪３，３と、一対の端部リング部材には、コイルバネ１０が装着してあり、このコイルバネ１０の付勢力により、一対の外輪３，３に適切な予圧荷重を与えるようになっている。   A pair of end ring members 9 and 9 are mounted on both sides of the pair of outer rings 3 and 3. A coil spring 10 is attached to the pair of outer rings 3 and 3 and the pair of end ring members, and an appropriate preload is applied to the pair of outer rings 3 and 3 by the biasing force of the coil spring 10. Yes.

図７に示すように、組立前には、内輪２と、複数の転動体４と、保持器５とは、一体的に組み立ててあり、一対の外輪３，３と、一対の端部リング部材９，９と分離してある。   As shown in FIG. 7, before the assembly, the inner ring 2, the plurality of rolling elements 4, and the cage 5 are integrally assembled, and a pair of outer rings 3, 3 and a pair of end ring members. 9 and 9 are separated.

図８に示すように、組込み時には、一方の外輪３と端部リング部材９とを軸箱１１に予め装着し、その後、内輪２と、複数の転動体４と、保持器５と、他方の外輪３と端部リング部材９とを一体的に組込んでいる。
特願２００３−３７４４０９号 As shown in FIG. 8, at the time of assembly, one outer ring 3 and the end ring member 9 are mounted in advance on the axle box 11, and then the inner ring 2, the plurality of rolling elements 4, the cage 5, and the other The outer ring 3 and the end ring member 9 are integrally incorporated.
Japanese Patent Application No. 2003-374409

しかしながら、図５に示した２列円錐ころ軸受では、部品点数が増え、さらに形状が複雑で大型化するという問題点があった。   However, the double-row tapered roller bearing shown in FIG. 5 has a problem that the number of parts is increased and the shape is complicated and the size is increased.

また、図６乃至図８に示した２列円錐ころ軸受のような構造では、正味の軸受幅が減少して、負荷容量の大幅な低下が起きていた。   Further, in the structure like the two-row tapered roller bearing shown in FIGS. 6 to 8, the net bearing width is reduced, and the load capacity is greatly reduced.

さらに、外輪は、内輪、転動体、保持器と分離してあり、軸受を一体として取り扱うことができない為（内輪、転動体、保持器は、非分離で一体物として取り扱えるが、外輪は分離する。）、軸受を軸受箱に設置する場合、一方の外輪を軸箱に設置した後、内輪、保持器、保持器を組み込まねばならず、組み込み作業に手間と時間が必要であった。   In addition, the outer ring is separated from the inner ring, rolling element, and cage, and the bearing cannot be handled as a unit (the inner ring, rolling element, and cage can be handled as a single piece without separation, but the outer ring is separated. .) When installing the bearing in the bearing housing, it was necessary to install the inner ring, the cage and the cage after installing one outer ring in the axle box.

本発明は、上述したような事情に鑑みてなされたものであって、軸受に予圧発生機構を内蔵し、かつ、外輪を不分離として一体として取り扱えることができる、転がり軸受を提供することを目的とする。   The present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a rolling bearing in which a preload generating mechanism is built in the bearing and the outer ring can be handled as a single piece without separation. And

上記の目的を達成するため、本発明に係る転がり軸受は、外周面に複数の内輪軌道面が形成された内輪と、内周面に外輪軌道面が形成された複数の外輪と、前記内輪軌道面と前記外輪軌道面との間に円周方向に複数列に整列され転動自在に配設された複数の転動体と、からなる転がり軸受に於いて、
係止部を複数の前記外輪に係合させて連結し、前記外輪の前記転がり軸受からの離脱を阻止するように前記外輪の間に配置された外輪間座を備え、
当該外輪間座に組み込まれたバネの付勢力によって、予圧発生機構を内蔵したことを特徴とする。 In order to achieve the above object, a rolling bearing according to the present invention includes an inner ring having a plurality of inner ring raceway surfaces formed on an outer peripheral surface, a plurality of outer rings having outer ring raceway surfaces formed on an inner peripheral surface, and the inner ring raceway. In a rolling bearing comprising a plurality of rolling elements arranged in a plurality of rows in a circumferential direction between a surface and the outer ring raceway surface, the rolling elements are arranged to be freely rollable.
An outer ring spacer disposed between the outer rings so as to prevent the outer ring from being detached from the rolling bearing;
A preload generating mechanism is built in by a biasing force of a spring incorporated in the outer ring spacer.

好適には、外輪間座は、一対の外輪の間に位置する中央凸部と、外輪の両側の凹段部に係止するカギ形状の一対の係止部と、を備えている。   Preferably, the outer ring spacer includes a central convex portion positioned between the pair of outer rings and a pair of key-shaped locking portions that are locked to the concave step portions on both sides of the outer ring.

また、好適には、外輪間座の端部では、カギ形状の係止部の幅寸法は、外輪の外径部の凹段部の幅寸法より、小さく設定してある。   Preferably, at the end of the outer ring spacer, the width dimension of the key-shaped locking part is set smaller than the width dimension of the concave step part of the outer diameter part of the outer ring.

本発明によれば、軸受の負荷容量を減少することなく、予圧機構を自分自身で加えることが可能であり、この予圧機構は、スラスト荷重を適切に受けることができる。   According to the present invention, it is possible to add the preload mechanism by itself without reducing the load capacity of the bearing, and this preload mechanism can appropriately receive the thrust load.

また、外輪間座によって、外輪を不分離にすることにより、外輪、内輪、転動体、保持器を一体として取り扱うことを可能にして、軸受の取り付け、取り外しの作業性を向上することができ、メンテナンス作業時間を短縮することができる。   In addition, by making the outer ring non-separated by the outer ring spacer, it is possible to handle the outer ring, inner ring, rolling element, and cage as a single unit, and the workability of mounting and removing the bearing can be improved. Maintenance work time can be shortened.

以下、本発明の実施の形態に係る転がり軸受を図面を参照しつつ説明する。   Hereinafter, a rolling bearing according to an embodiment of the present invention will be described with reference to the drawings.

図１は、本発明の実施の形態に係る２列円錐ころ軸受の縦断面図である。図２は、図１のＩＩ部の詳細を示す断面図である。図３（ａ）は、外輪間座の軸方向の断面図であり、（ｂ）は、それに直交する方向の断面図である。図４（ａ）は、図１のＩＩ部の詳細を示す断面図であり、（ｂ）は、その分解断面図である。   FIG. 1 is a longitudinal sectional view of a two-row tapered roller bearing according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing details of the II part of FIG. FIG. 3A is a sectional view in the axial direction of the outer ring spacer, and FIG. 3B is a sectional view in a direction perpendicular to the axial direction. 4A is a cross-sectional view showing details of the II part of FIG. 1, and FIG. 4B is an exploded cross-sectional view thereof.

図１に示すように、２列円錐ころ軸受１は、内輪２と、外輪３と、複数の転動体４とから構成されている。内輪２の外周面には、２列の内輪軌道面２ａが形成されている。２列円錐ころ軸受１は、２個の外輪３を備え、夫々の外輪３の内周面に外輪軌道面３ａが形成されている。内輪軌道面２ａと外輪軌道面３ａの間には、複数の転動体４が円周方向に２列に整列され、転動自在に配設されている。複数の転動体４は、例えば鋼板の打抜き保持器５によって回転自在に保持されている。   As shown in FIG. 1, the two-row tapered roller bearing 1 includes an inner ring 2, an outer ring 3, and a plurality of rolling elements 4. Two rows of inner ring raceway surfaces 2 a are formed on the outer circumferential surface of the inner ring 2. The two-row tapered roller bearing 1 includes two outer rings 3, and an outer ring raceway surface 3 a is formed on the inner peripheral surface of each outer ring 3. Between the inner ring raceway surface 2a and the outer ring raceway surface 3a, a plurality of rolling elements 4 are arranged in two rows in the circumferential direction, and are arranged to freely roll. The plurality of rolling elements 4 are rotatably held by, for example, a steel plate punching cage 5.

次に、本実施の形態では、外輪間座２０に組み込まれたコイルバネ３０の付勢力による予圧発生機構が設けられている。   Next, in the present embodiment, a preload generation mechanism is provided by the biasing force of the coil spring 30 incorporated in the outer ring spacer 20.

一対の外輪３，３の外径側には、外輪間座２０が外嵌してある。なお、外輪３，３の両端部には、凹段部３ｂ，３ｂが形成してある。   An outer ring spacer 20 is fitted on the outer diameter side of the pair of outer rings 3 and 3. Recessed steps 3b and 3b are formed at both ends of the outer rings 3 and 3, respectively.

外輪間座２０は、一対の外輪３，３の間に位置する中央凸部２１と、外輪３，３の両側の凹段部３ｂ，３ｂに係止するカギ形状の一対の係止部２２，２２と、を備えている。   The outer ring spacer 20 includes a central convex portion 21 positioned between the pair of outer rings 3 and 3, and a pair of key-shaped locking portions 22 that are locked to the concave step portions 3 b and 3 b on both sides of the outer rings 3 and 3. 22.

外輪間座２０の両端部では、このカギ形状の係止部２２，２２により、外輪３の外径端部の凹段部３ｂが係止されて、外輪３，３は、不分離になる。   At both ends of the outer ring spacer 20, the key-shaped locking portions 22, 22 lock the concave step 3 b at the outer diameter end of the outer ring 3, so that the outer rings 3, 3 are not separated.

また、外輪間座２０は、図３に示すように、２分割構造に構成してあり、ボルト２３により締結されて一体的に組立てられ、外輪３，３に組み付けられるようになっている。このように、２分割された外輪間座２０によって、外輪３，３が不分離になっている。   Further, as shown in FIG. 3, the outer ring spacer 20 has a two-part structure, is fastened by a bolt 23 and is assembled integrally, and is assembled to the outer rings 3 and 3. Thus, the outer rings 3 and 3 are not separated by the outer ring spacer 20 divided into two parts.

さらに、図２に示すように、外輪間座２０の端部では、カギ形状の係止部２２の幅寸法Ａは、外輪３の外径部の凹段部３ｂの幅寸法Ｂより、小さく設定してあり、両者の間には、若干のガタが設けてある。   Further, as shown in FIG. 2, at the end of the outer ring spacer 20, the width dimension A of the key-shaped locking part 22 is set smaller than the width dimension B of the recessed step part 3 b of the outer diameter part of the outer ring 3. There is some backlash between the two.

さらに、外輪間座２０の端部内径寸法Ｄは、外輪３の凹段部３ｂの内径端部の寸法Ｃより、大きく設定してある。外輪間座２０の内周径寸法Ｆは、これに対向する外輪３の外周径寸法Ｅより、大きく設定してある。これらより、外輪間座２０は、外輪３を拘束はしない。   Further, the inner diameter dimension D of the outer ring spacer 20 is set to be larger than the dimension C of the inner diameter end of the recessed step portion 3 b of the outer ring 3. An inner peripheral diameter dimension F of the outer ring spacer 20 is set larger than an outer peripheral diameter dimension E of the outer ring 3 facing the outer ring spacer 20. Accordingly, the outer ring spacer 20 does not restrain the outer ring 3.

次いで、図１，図２及び図４に示すように、外輪間座２０の係止部２２には、軸方向に延びる貫通孔２４が形成してあり、この貫通孔２４は、周方向に複数個設けてある。   Next, as shown in FIGS. 1, 2, and 4, the locking portion 22 of the outer ring spacer 20 has a through hole 24 extending in the axial direction, and there are a plurality of through holes 24 in the circumferential direction. It is provided.

貫通孔２４には、コイルバネ３０が挿入してあり、止めネジ３１により封止してある。これにより、コイルバネ３０が外輪３の凹段部３ｂを弾性的に押圧し、このコイルバネ３０の付勢力により、一対の外輪３，３に適切な予圧荷重を与えるようになっている。   A coil spring 30 is inserted into the through hole 24 and sealed with a set screw 31. Thereby, the coil spring 30 elastically presses the concave step portion 3 b of the outer ring 3, and an appropriate preload is applied to the pair of outer rings 3 and 3 by the biasing force of the coil spring 30.

なお、貫通孔２４及びコイルバネ３０の個数は、適切な予圧荷重を発生させるのに適しており、コイルバネ３０は、適切な仕様を持っている。また、止めネジ３１は、コイルバネ３０が脱落することを防止する働きもある。   The numbers of the through holes 24 and the coil springs 30 are suitable for generating an appropriate preload, and the coil springs 30 have appropriate specifications. The set screw 31 also has a function of preventing the coil spring 30 from falling off.

以上のように、本実施の形態によれば、軸受１の負荷容量を減少することなく、予圧機構を自分自身で加えることが可能であり、この予圧機構は、スラスト荷重を適切に受けることができる。   As described above, according to the present embodiment, the preload mechanism can be applied by itself without reducing the load capacity of the bearing 1, and the preload mechanism can appropriately receive the thrust load. it can.

また、外輪間座２０によって、外輪３を不分離にすることにより、外輪３、内輪２、転動体４、保持器５を一体として取り扱うことを可能にして、軸受１の取り付け、取り外しの作業性を向上することができ、メンテナンス作業時間を短縮することができる。   Further, by making the outer ring 3 non-separated by the outer ring spacer 20, the outer ring 3, the inner ring 2, the rolling element 4, and the cage 5 can be handled as a unit, and workability of mounting and removing the bearing 1 is achieved. The maintenance work time can be shortened.

なお、本発明は、上述した実施の形態に限定されず、種々変形可能である。実施の形態では、予庄を発生させるものとして、コイルバネを用いているが、適切な予圧荷重を発生し得る弾性部材であれば、これに限定されることなく、たとえば、板ばね、皿ばねなどでも良い。   In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible. In the embodiment, a coil spring is used to generate the preload, but the elastic member is not limited to this as long as it is an elastic member capable of generating an appropriate preload, for example, a leaf spring, a disc spring, etc. But it ’s okay.

本発明の実施の形態に係る２列円錐ころ軸受の縦断面図である。It is a longitudinal cross-sectional view of the double row tapered roller bearing which concerns on embodiment of this invention. 図１のＩＩ部の詳細を示す断面図である。It is sectional drawing which shows the detail of the II section of FIG. （ａ）は、外輪間座の軸方向の断面図であり、（ｂ）は、それに直交する方向の断面図である。(A) is sectional drawing of the axial direction of an outer ring | wheel spacer, (b) is sectional drawing of the direction orthogonal to it. （ａ）は、図１のＩＩ部の詳細を示す断面図であり、（ｂ）は、その分解断面図である。(A) is sectional drawing which shows the detail of the II section of FIG. 1, (b) is the decomposition | disassembly sectional drawing. 従来例に係る２列円錐ころ軸受の縦断面図である。It is a longitudinal cross-sectional view of the double row tapered roller bearing which concerns on a prior art example. 他の従来例に係る２列円錐ころ軸受の縦断面図である。It is a longitudinal cross-sectional view of the double row tapered roller bearing which concerns on another prior art example. ２列円錐ころ軸受で、内輪、転動体や保持器と、外輪とを分離した状態の縦断面図である。It is a longitudinal cross-sectional view of the state which isolate | separated the inner ring | wheel, the rolling element, the holder | retainer, and the outer ring | wheel with the double row tapered roller bearing. ２列円錐ころ軸受を組み込む状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which incorporates a double row tapered roller bearing.

符号の説明Explanation of symbols

１ ２列円錐ころ軸受
２ 内輪
２ａ 内輪軌道面
３ 外輪
３ａ 外輪軌道面
３ｂ 凹段部
４ 転動体
５ 保持器
６ａ，６ｂ 外嵌部材
７ａ，７ｂ 係止部
８ コイルバネ
９ 端部リング部材
１０ コイルバネ
１１ 軸箱
２０ 外輪間座
２１ 中央凸部
２２ カギ形状の係止部
２３ ボルト
２４ 貫通孔
３０ コイルバネ
３１ 止めネジ DESCRIPTION OF SYMBOLS 1 2 row tapered roller bearing 2 Inner ring 2a Inner ring raceway surface 3 Outer ring 3a Outer ring raceway surface 3b Concave step part 4 Rolling element 5 Cage 6a, 6b External fitting member 7a, 7b Locking part 8 Coil spring 9 End ring member 10 Coil spring 11 Axis box 20 Outer ring spacer 21 Center convex part 22 Locking part of key shape 23 Bolt 24 Through hole 30 Coil spring 31 Set screw

Claims (3)

外周面に複数の内輪軌道面が形成された内輪と、内周面に外輪軌道面が形成された複数の外輪と、前記内輪軌道面と前記外輪軌道面との間に円周方向に複数列に整列され転動自在に配設された複数の転動体と、からなる転がり軸受に於いて、
係止部を複数の前記外輪に係合させて連結し、前記外輪の前記転がり軸受からの離脱を阻止するように前記外輪の間に配置された外輪間座を備え、
当該外輪間座に組み込まれたバネの付勢力によって、予圧発生機構を内蔵したことを特徴とする転がり軸受。 An inner ring having a plurality of inner ring raceway surfaces formed on the outer peripheral surface, a plurality of outer rings having outer ring raceway surfaces formed on the inner peripheral surface, and a plurality of rows in a circumferential direction between the inner ring raceway surface and the outer ring raceway surface In a rolling bearing comprising a plurality of rolling elements arranged in a freely rotatable manner,
An outer ring spacer disposed between the outer rings so as to prevent the outer ring from being detached from the rolling bearing;
A rolling bearing characterized in that a preload generating mechanism is built in by a biasing force of a spring incorporated in the outer ring spacer. 外輪間座は、一対の外輪の間に位置する中央凸部と、外輪の両側の凹段部に係止するカギ形状の一対の係止部と、を備えていることを特徴とする請求項１に記載の転がり軸受。   The outer ring spacer includes a central convex portion located between the pair of outer rings and a pair of hook-shaped locking portions that are locked to the concave step portions on both sides of the outer ring. The rolling bearing according to 1. 外輪間座の端部では、カギ形状の係止部の幅寸法は、外輪の外径部の凹段部の幅寸法より、小さく設定してあることを特徴とする請求項２に記載の転がり軸受。   3. The rolling according to claim 2, wherein at the end of the outer ring spacer, the width dimension of the key-shaped locking part is set smaller than the width dimension of the concave step part of the outer diameter part of the outer ring. bearing.
JP2005236821A 2005-08-17 2005-08-17 Rolling bearing Withdrawn JP2007051669A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105723106A (en) * 2013-11-13 2016-06-29 Ntn株式会社 Bearing preloading device
WO2016114195A1 (en) * 2015-01-13 2016-07-21 Ntn株式会社 Bearing preload mechanism and shaft support device
CN107830050A (en) * 2017-12-06 2018-03-23 安徽睿知信信息科技有限公司 A kind of single-row tapered roller bearing of convenient dismounting
CN109307014A (en) * 2018-11-27 2019-02-05 瓦房店轴承集团国家轴承工程技术研究中心有限公司 Tapered roller bearing with laminating formula spacer ring
CN110864045A (en) * 2019-12-26 2020-03-06 瓦房店轴承集团国家轴承工程技术研究中心有限公司 Ball bearing with replaceable wear contact area
US10738825B2 (en) 2018-05-08 2020-08-11 Roller Bearing Company Of America, Inc. Double row tapered roller bearing assembly having a two-piece outer ring

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105723106A (en) * 2013-11-13 2016-06-29 Ntn株式会社 Bearing preloading device
EP3070351A4 (en) * 2013-11-13 2016-11-30 Ntn Toyo Bearing Co Ltd Bearing preloading device
US9863469B2 (en) 2013-11-13 2018-01-09 Ntn Corporation Bearing preloading device
WO2016114195A1 (en) * 2015-01-13 2016-07-21 Ntn株式会社 Bearing preload mechanism and shaft support device
JP2016130532A (en) * 2015-01-13 2016-07-21 Ntn株式会社 Bearing preload mechanism and shaft support device
CN107830050A (en) * 2017-12-06 2018-03-23 安徽睿知信信息科技有限公司 A kind of single-row tapered roller bearing of convenient dismounting
US10738825B2 (en) 2018-05-08 2020-08-11 Roller Bearing Company Of America, Inc. Double row tapered roller bearing assembly having a two-piece outer ring
CN109307014A (en) * 2018-11-27 2019-02-05 瓦房店轴承集团国家轴承工程技术研究中心有限公司 Tapered roller bearing with laminating formula spacer ring
CN110864045A (en) * 2019-12-26 2020-03-06 瓦房店轴承集团国家轴承工程技术研究中心有限公司 Ball bearing with replaceable wear contact area
CN110864045B (en) * 2019-12-26 2024-03-01 瓦房店轴承集团国家轴承工程技术研究中心有限公司 Ball bearing with replaceable wear contact areas

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