JP2009185938A - Roller bearing - Google Patents

Roller bearing Download PDF

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Publication number
JP2009185938A
JP2009185938A JP2008027723A JP2008027723A JP2009185938A JP 2009185938 A JP2009185938 A JP 2009185938A JP 2008027723 A JP2008027723 A JP 2008027723A JP 2008027723 A JP2008027723 A JP 2008027723A JP 2009185938 A JP2009185938 A JP 2009185938A
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Prior art keywords
roller bearing
raceway surface
groove
inner ring
tapered
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JP2008027723A
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Japanese (ja)
Inventor
Yasuhiko Shimizu
保彦 清水
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2008027723A priority Critical patent/JP2009185938A/en
Publication of JP2009185938A publication Critical patent/JP2009185938A/en
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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
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C19/36—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 a single row of rollers
    • F16C19/364—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 a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller bearing capable of operating without causing trouble owing to imperfect lubrication even under a poorly lubricated condition such as at a low temperature in winter, at starting after a long-time stop, etc. <P>SOLUTION: A plurality of recesses 28a are formed at the escape groove 28 of the inner ring 20. Because the lubricating oil can be held certainly in the escape groove 28 by seizing the oil with these recesses 28a, it is possible to enhance the lubricity by feeding the oil into the bearing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、円筒ころ軸受や円すいころ軸受等のころ軸受に関し、特に鉄道車両の駆動装置に用いられるころ軸受に関する。   The present invention relates to a roller bearing such as a cylindrical roller bearing or a tapered roller bearing, and more particularly to a roller bearing used in a drive device for a railway vehicle.

例えば鉄道車両の駆動装置では、歯車の回転により潤滑油を跳ね上げることで軸受の潤滑を行うことが多い。しかし、冬期の低温時や長時間停車した後は、軸受の摺動部、例えば内輪のつば面と転動体との摺動部に油がなかなか供給されず、潤滑不良が生じる恐れがあった。   For example, in a railway vehicle drive device, a bearing is often lubricated by splashing up lubricating oil by rotation of a gear. However, after low temperatures in winter and after stopping for a long time, oil is not easily supplied to the sliding portion of the bearing, for example, the sliding portion between the collar surface of the inner ring and the rolling element, which may cause poor lubrication.

この対策として、例えば特許文献１に示されている円すいころ軸受では、内輪の軌道面とつば面との境界部に扁平状のぬすみ溝を設け、このぬすみ溝に潤滑油を保持し、ぬすみ溝に保持した潤滑油を前記摺動部に供給することにより、軸受の潤滑性を高めている。   As a countermeasure, for example, in the tapered roller bearing shown in Patent Document 1, a flat thin groove is provided at the boundary between the raceway surface and the flange surface of the inner ring, and the lubricating oil is held in the thin groove, The lubricity of the bearing is improved by supplying the lubricating oil held in the above to the sliding portion.

特開２００６−３００１７６号公報JP 2006-300196 A

しかしながら、上記のようにぬすみ溝を扁平状に設けても、ぬすみ溝に潤滑油を保持しておくことができない場合があり、潤滑不良が生じる恐れを拭いきれない。   However, even if the thin groove is provided in a flat shape as described above, the lubricating oil may not be retained in the thin groove, and the risk of poor lubrication cannot be wiped out.

本発明の課題は、冬期低温時や長時間停止後の始動時等の希少潤滑条件下においても、潤滑不良を起こすことなく駆動することができるころ軸受を提供することにある。   An object of the present invention is to provide a roller bearing that can be driven without causing poor lubrication even under rare lubrication conditions such as at low temperatures in winter and at the start after a long stop.

前記課題を解決するために、本発明は、内周面に軌道面を有する外輪と、外周面に軌道面を有し、軌道面の軸方向両側につば面を形成した内輪と、外輪の軌道面と内輪の軌道面との間に転動自在に配された複数の転動体とを備え、内輪の軌道面とつば面との境界部にぬすみ溝を設けたころ軸受において、ぬすみ溝の内面に、複数の凹部を形成したことを特徴とする。   In order to solve the above-mentioned problems, the present invention provides an outer ring having a raceway surface on the inner peripheral surface, an inner ring having a raceway surface on the outer peripheral surface and formed with flange surfaces on both axial sides of the raceway surface, and a raceway of the outer ring. A roller bearing having a plurality of rolling elements arranged in a freely rolling manner between a raceway surface of the inner ring and a raceway surface of the inner ring, and having a fillet groove at the boundary between the raceway surface and the flange surface of the inner ring. In addition, a plurality of recesses are formed.

このように、ぬすみ溝に複数の凹部を設けることにより、この凹部で潤滑油を捕捉することができるため、ぬすみ溝に潤滑油を確実に保持することができる。希少潤滑条件下における軸受運転時には、このぬすみ溝に保持された潤滑油が軌道輪と転動体との摺動部（例えばつば面と転動体の端面との接触部）に供給され、潤滑不良を予防することができる。また、ぬすみ溝に凹部を設けることで、ぬすみ溝で保持することのできる油量を増すことができるため、摺動部により多くの油が供給され、潤滑性を高めることができる。   In this way, by providing a plurality of recesses in the relief groove, the lubricant can be captured by the recesses, so that the lubricant can be reliably held in the relief groove. During bearing operation under rare lubrication conditions, the lubricating oil retained in this fillet groove is supplied to the sliding part between the race and the rolling element (for example, the contact part between the collar surface and the end face of the rolling element), which causes poor lubrication. Can be prevented. Moreover, since the amount of oil that can be held in the sag groove can be increased by providing the recess in the slush groove, a larger amount of oil is supplied to the sliding portion and the lubricity can be improved.

また、前記課題は、ぬすみ溝を開口側へ向けて先すぼまり形状とすることによっても解決することができる。すなわち、ぬすみ溝の先すぼまり部分で潤滑油を捕捉することができるため、ぬすみ溝から潤滑油が流れ落ちにくくなり、より確実に潤滑油をぬすみ溝内に保持することができるため、上記と同様の効果を得ることができる。また、先すぼまり形状とすることにより、ぬすみ溝の開口部の大きさを維持したまま、ぬすみ溝の内部の容積を増すことができるため、保持できる油量が増し、さらに潤滑性を高めることができる。   Moreover, the said subject can be solved also by making a thin groove | channel into a tapered shape toward the opening side. That is, since the lubricating oil can be captured at the constricted portion of the thin groove, the lubricating oil is less likely to flow from the thin groove, and the lubricating oil can be more securely held in the thin groove. Similar effects can be obtained. In addition, the tapered shape allows the internal volume of the slash groove to be increased while maintaining the size of the opening of the slush groove, thereby increasing the amount of oil that can be retained and further improving the lubricity. be able to.

転動体として円すいころを使用した円すいころ軸受では、円すいころの大径端面と、これと対向する内輪の大つば面との間に大きな負荷が加わるため、この部分の潤滑を高めることが重要となる。従って、円すいころ軸受の場合は、少なくとも内輪の軌道面の大径側に設けられたぬすみ溝に前記複数の凹部を形成したり、このぬすみ溝を先すぼまり形状として、円すいころと内輪の大つば面との接触部の潤滑性を高めることが望ましい。   In tapered roller bearings using tapered rollers as rolling elements, a large load is applied between the large-diameter end surface of the tapered roller and the large collar surface of the inner ring facing the tapered roller. Become. Therefore, in the case of a tapered roller bearing, the plurality of recesses are formed in at least a recess groove provided on the large diameter side of the raceway surface of the inner ring, or the recess groove is formed in a tapered shape so that the tapered roller and the inner ring have a tapered shape. It is desirable to improve the lubricity of the contact portion with the large brim surface.

上記のようなころ軸受を鉄道車両の駆動装置に使用すれば、冬期低温時や長時間停止後の始動時等であっても、潤滑不良を起こすことなく駆動装置を運転することができる。   If such a roller bearing is used for a railway vehicle drive device, the drive device can be operated without causing poor lubrication even at low temperatures in winter or at the start after a long stop.

以上のように、本発明によると、冬期低温時や長時間停止後の始動時等の希少潤滑条件下においても、潤滑不良を起こすことなく駆動することができるころ軸受を得ることができる。   As described above, according to the present invention, it is possible to obtain a roller bearing that can be driven without causing poor lubrication even under rare lubrication conditions such as at low temperatures in winter and at the start after a long stop.

本発明の実施形態を図面に基づいて説明する。   Embodiments of the present invention will be described with reference to the drawings.

図１に示す本発明の実施形態に係るころ軸受１（円すいころ軸受）は、例えば鉄道車両の駆動装置用として使用され、外輪１０と、内輪２０と、複数の円すいころ３０と、保持器４０とを主要な構成要素としている。   A roller bearing 1 (tapered roller bearing) according to an embodiment of the present invention shown in FIG. 1 is used, for example, for a drive device of a railway vehicle, and includes an outer ring 10, an inner ring 20, a plurality of tapered rollers 30, and a cage 40. Are the main components.

外輪１０の内周面には円すい状の軌道面１２が形成され、内輪２０の外周面には円すい状の軌道面２２が形成される。外輪１０の軌道面１２と内輪２０の軌道面２２との間には、転動体として複数の円すいころ３０が転動自在に配列される。複数の円すいころ３０は保持器４０によって所定の円周方向間隔に保持される。   A conical raceway surface 12 is formed on the inner peripheral surface of the outer ring 10, and a conical raceway surface 22 is formed on the outer peripheral surface of the inner ring 20. Between the raceway surface 12 of the outer ring 10 and the raceway surface 22 of the inner ring 20, a plurality of tapered rollers 30 are arranged so as to roll freely as rolling elements. The plurality of tapered rollers 30 are held by the cage 40 at predetermined circumferential intervals.

内輪２０の軌道面２２の大径側には大つば面２４が形成され、小径側には小つば面２６が形成される。軌道面２２と、大つば面２４及び小つば面２６との境界部には、それぞれぬすみ溝２８、２９が形成される。大つば面２４側のぬすみ溝２８の内面の最奥部には、円周方向等間隔に複数の凹部２８ａが形成される。この凹部２８ａで潤滑油を捕捉することにより、ぬすみ溝２８に潤滑油を保持しておくことができ、この潤滑油を軸受内の摺動部に供給することで潤滑性を高めることができる。特に、本実施形態のような円すいころ軸受の場合、円すいころ３０の大径端面３２と大つば面２４との間には大きな負荷が加わるため、この部分に近接した大径側のぬすみ溝２８に凹部２８ａを設けて潤滑油を保持しておくことにより、より効果的に潤滑性を高めることができる。   A large collar surface 24 is formed on the large diameter side of the raceway surface 22 of the inner ring 20, and a small collar surface 26 is formed on the small diameter side. Numerous grooves 28 and 29 are formed at the boundaries between the raceway surface 22 and the large brim surface 24 and the small brim surface 26, respectively. A plurality of recesses 28a are formed at equal intervals in the circumferential direction in the innermost part of the inner surface of the thin groove 28 on the large brim surface 24 side. By capturing the lubricating oil in the concave portion 28a, the lubricating oil can be held in the thin groove 28, and the lubricity can be improved by supplying the lubricating oil to the sliding portion in the bearing. In particular, in the case of the tapered roller bearing as in the present embodiment, a large load is applied between the large diameter end surface 32 and the large collar surface 24 of the tapered roller 30, and therefore, the large diameter side thin groove 28 close to this portion. By providing the recess 28a in the base plate and retaining the lubricating oil, the lubricity can be improved more effectively.

上記の実施形態では、ぬすみ溝２８の内面に設けた凹部２８ａが、円周方向等間隔の複数箇所に設けられているが、これに限らず、例えばぬすみ溝２８の内面にディンプル状やローレット状に形成してもよい。また、小径側のぬすみ溝２９にも同様の凹部を形成すれば、さらに潤滑性を高めることができる。   In the above-described embodiment, the recesses 28a provided on the inner surface of the thin groove 28 are provided at a plurality of locations at equal intervals in the circumferential direction. However, the present invention is not limited to this. You may form in. Further, if a similar recess is formed in the small-diameter side recess groove 29, the lubricity can be further improved.

また、上記実施形態では、ぬすみ溝２８に凹部２８ａを設けることにより、ぬすみ溝２８内における潤滑油の保持性を高めているが、本発明はこれに限られない。例えば、図２に示す例では、ぬすみ溝２８を開口側へ向けて先すぼまりの形状としている。具体的には、ぬすみ溝２８の開口部（溝幅Ｗ１）から奥部へ向けて徐々に溝幅を広げ、溝幅が最大となる部分（溝幅Ｗ２）を越えると、徐々に溝幅を狭めて最奥部まで達している。これにより、ぬすみ溝２８内の潤滑油を、ぬすみ溝２８の先すぼまりの部分で捕捉することができるため、潤滑油をぬすみ溝２８内に確実に保持することができる。また、開口部の溝幅Ｗ１を変えることなくぬすみ溝２８の内部の容積を拡大することができるため、他の部分の設計に影響を与えることなく、ぬすみ溝２８の潤滑油の保持量を増すことができる。尚、図２に示すような先すぼまり形状のぬすみ溝２８は、一回の加工で形成することは難しい場合があるが、このときはさらに追加工することで形成することができる。   Further, in the above embodiment, the recess 28a is provided in the thinning groove 28 to improve the retention of the lubricating oil in the thinning groove 28, but the present invention is not limited to this. For example, in the example shown in FIG. 2, the narrow groove 28 is formed in a tapered shape toward the opening side. Specifically, the groove width is gradually widened from the opening (groove width W1) to the back of the fillet groove 28, and when the portion where the groove width is maximized (groove width W2) is exceeded, the groove width is gradually increased. Narrow down to the deepest part. As a result, the lubricating oil in the sag groove 28 can be captured by the tapered portion of the slush groove 28, so that the lubricating oil can be reliably held in the slush groove 28. Further, since the internal volume of the fillet groove 28 can be expanded without changing the groove width W1 of the opening, the amount of lubricating oil retained in the fillet groove 28 is increased without affecting the design of other portions. be able to. 2 may be difficult to form by a single process, but in this case, it can be formed by additional machining.

また、図３に示す例のように、先すぼまり形状のぬすみ溝２８の内面に、複数の凹部２８ａを形成すれば、先すぼまり形状による効果と凹部による効果の双方を得ることができ、軸受の潤滑性をより一層高めることができる。   Further, as in the example shown in FIG. 3, if a plurality of concave portions 28a are formed on the inner surface of the tapered groove 28, both the effect of the tapered shape and the effect of the recessed portion can be obtained. It is possible to further improve the lubricity of the bearing.

また、本発明は円すいころ軸受に限らず、円筒ころ軸受等の他のころ軸受に適用することができる。また、本発明のころ軸受は、鉄道車両の駆動装置用に限らず、自動車や産業機械等、他の用途に適用することができる。   The present invention can be applied not only to a tapered roller bearing but also to other roller bearings such as a cylindrical roller bearing. In addition, the roller bearing of the present invention is not limited to a railway vehicle drive device but can be applied to other uses such as automobiles and industrial machines.

本発明にかかるころ軸受の断面図である。It is sectional drawing of the roller bearing concerning this invention. 他の例のころ軸受の断面図である。It is sectional drawing of the roller bearing of another example. 他の例のころ軸受の断面図である。It is sectional drawing of the roller bearing of another example.

符号の説明Explanation of symbols

１ ころ軸受
１０ 外輪
１２ 軌道面
２０ 内輪
２２ 軌道面
２４ 大つば面
２６ 小つば面
２８、２９ ぬすみ溝
２８ａ 凹部
３０ 円すいころ
４０ 保持器 DESCRIPTION OF SYMBOLS 1 Roller bearing 10 Outer ring 12 Race surface 20 Inner ring 22 Race surface 24 Large brim surface 26 Small brim surface 28, 29 Nuts groove 28a Recess 30 Tapered roller 40 Cage

Claims (5)

内周面に軌道面を有する外輪と、外周面に軌道面を有する内輪と、外輪の軌道面と内輪の軌道面との間に転動自在に配された複数の転動体とを備え、少なくとも一方の軌道面の端部につば面を形成すると共に、軌道面とつば面との境界部にぬすみ溝を設けたころ軸受において、
ぬすみ溝の内面に、複数の凹部を形成したことを特徴とするころ軸受。 An outer ring having a raceway surface on the inner peripheral surface, an inner ring having a raceway surface on the outer peripheral surface, and a plurality of rolling elements arranged to be freely rollable between the raceway surface of the outer ring and the raceway surface of the inner ring, In a roller bearing in which a flange surface is formed at the end of one raceway surface and a thin groove is provided at the boundary between the raceway surface and the collar surface,
A roller bearing characterized in that a plurality of recesses are formed on the inner surface of the relief groove. 内周面に軌道面を有する外輪と、外周面に軌道面を有する内輪と、外輪の軌道面と内輪の軌道面との間に転動自在に配された複数の転動体とを備え、少なくとも一方の軌道面の端部につば面を形成すると共に、軌道面とつば面との境界部にぬすみ溝を設けたころ軸受において、
ぬすみ溝を、開口側へ向けて先すぼまり形状としたことを特徴とするころ軸受。 An outer ring having a raceway surface on the inner peripheral surface, an inner ring having a raceway surface on the outer peripheral surface, and a plurality of rolling elements arranged to be freely rollable between the raceway surface of the outer ring and the raceway surface of the inner ring, In a roller bearing in which a flange surface is formed at the end of one raceway surface and a thin groove is provided at the boundary between the raceway surface and the collar surface,
A roller bearing characterized in that the relief groove is tapered toward the opening side. 転動体として円すいころを使用し、内輪の軌道面の大径側に設けられたぬすみ溝に前記複数の凹部を形成した請求項１記載のころ軸受。   The roller bearing according to claim 1, wherein a tapered roller is used as a rolling element, and the plurality of recesses are formed in a hollow groove provided on a large diameter side of the raceway surface of the inner ring. 転動体として円すいころを使用し、内輪の軌道面の大径側に設けられたぬすみ溝を、開口側へ向けて先すぼまり形状とした請求項２記載のころ軸受。   The roller bearing according to claim 2, wherein a tapered roller is used as a rolling element, and a recess groove provided on the large diameter side of the raceway surface of the inner ring is tapered toward the opening side. 鉄道車両の駆動装置用として用いられる請求項１又は２記載のころ軸受。   The roller bearing according to claim 1, wherein the roller bearing is used for a drive device of a railway vehicle.
JP2008027723A 2008-02-07 2008-02-07 Roller bearing Withdrawn JP2009185938A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014231898A (en) * 2013-05-30 2014-12-11 日本精工株式会社 Roller bearing
JP2016156487A (en) * 2015-02-26 2016-09-01 日本精工株式会社 Ball screw
DE102019007309A1 (en) 2018-11-23 2020-05-28 Sew-Eurodrive Gmbh & Co Kg Bearing system with one bearing and gearbox with one bearing system
CN113211015A (en) * 2021-05-18 2021-08-06 中国航发哈尔滨轴承有限公司 Processing technology method of vertical over-travel groove thin-wall needle roller outer ring

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014231898A (en) * 2013-05-30 2014-12-11 日本精工株式会社 Roller bearing
JP2016156487A (en) * 2015-02-26 2016-09-01 日本精工株式会社 Ball screw
DE102019007309A1 (en) 2018-11-23 2020-05-28 Sew-Eurodrive Gmbh & Co Kg Bearing system with one bearing and gearbox with one bearing system
CN113211015A (en) * 2021-05-18 2021-08-06 中国航发哈尔滨轴承有限公司 Processing technology method of vertical over-travel groove thin-wall needle roller outer ring

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Effective date: 20110510