JP6011099B2 - Rolling bearing - Google Patents

Rolling bearing Download PDF

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Publication number
JP6011099B2
JP6011099B2 JP2012161691A JP2012161691A JP6011099B2 JP 6011099 B2 JP6011099 B2 JP 6011099B2 JP 2012161691 A JP2012161691 A JP 2012161691A JP 2012161691 A JP2012161691 A JP 2012161691A JP 6011099 B2 JP6011099 B2 JP 6011099B2
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Japan
Prior art keywords
lubricating oil
seal
rotating wheel
annular groove
rolling bearing
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Expired - Fee Related
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JP2012161691A
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JP2014020506A (en
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洋佑 永野
洋佑 永野
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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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3862—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together
    • F16C33/3875—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together made from plastic, e.g. two injection moulded parts joined by a snap fit
    • 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
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • 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
    • F16C33/38—Ball cages
    • F16C33/3806—Details of interaction of cage and race, e.g. retention, centring
    • 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
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/667—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to conditioning, e.g. cooling, filtering
    • 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
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—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
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/30—Fluoropolymers
    • F16C2208/32—Polytetrafluorethylene [PTFE]
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/36—Polyarylene ether ketones [PAEK], e.g. PEK, PEEK
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/52—Polyphenylene sulphide [PPS]
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/60—Polyamides [PA]
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/66—Acetals, e.g. polyoxymethylene [POM]
    • 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
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6674—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to the amount supplied, e.g. gaps to restrict flow of the liquid
    • 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
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)

Description

本発明は、転がり軸受例えば産業用軸受装置や鉄道車両用車軸軸受装置の転がり軸受に関する。   The present invention relates to a rolling bearing, for example, a rolling bearing of an industrial bearing device or an axle bearing device for a railway vehicle.

従来、産業用軸受装置や鉄道車両用車軸軸受装置などの転がり軸受において、固定輪と回転輪との間に転動自在に配設された複数の転動体が両輪の軌道面で転がり、その摩擦で、鉄系粒子などの摩耗粉が発生してくるが、この摩耗粉が転がり軸受の軌道面に噛み込むと、その軌道面に損傷を与えてしまう。そして、軌道面の損傷が拡がると、転がり軸受の異音の発生および、転がり軸受の寿命を低下させる畏れがある。このような事態を回避する方法として、例えば潤滑油のろ過装置を設けて摩耗粉を除去する方法が考えられるが、装置構成が複雑化(部品点数が増加)して装置が大型化し、その結果、製造コストが上昇してしまう。また、例えば特許文献１には、鉄道車両車軸用転がり軸受の構成が示されており、転がり軸受の密封装置に磁性体を設置して、摩耗粉を集める工夫が提案されている。   Conventionally, in a rolling bearing such as an industrial bearing device or an axle bearing device for a railway vehicle, a plurality of rolling elements arranged so as to freely roll between a fixed wheel and a rotating wheel roll on the raceway surfaces of both wheels, and the friction thereof. Thus, wear powder such as iron-based particles is generated. If the wear powder bites into the raceway surface of the rolling bearing, the raceway surface is damaged. And when damage to a raceway surface spreads, there exists a possibility of generating the noise of a rolling bearing and reducing the life of a rolling bearing. As a method of avoiding such a situation, for example, a method of removing a wear powder by providing a lubricating oil filtering device can be considered, but the device configuration becomes complicated (the number of parts increases), resulting in a larger device, and as a result. The manufacturing cost will increase. Further, for example, Patent Document 1 discloses a configuration of a rolling bearing for a rolling stock axle, and a device for collecting wear powder by installing a magnetic body in a sealing device of the rolling bearing is proposed.

特開２００６−３８０８５号公報JP 2006-38085 A

このものは、軌道面と密封装置が互いに離れているため、密封装置の磁性体に摩耗粉を吸着させにくい問題があった。本発明は、このような問題を解決するためになされており、その目的は、磁性体に摩耗粉を積極的に吸着させることのできる転がり軸受を提供することにある。   Since this raceway surface and the sealing device are separated from each other, there is a problem that it is difficult to adsorb the wear powder on the magnetic body of the sealing device. The present invention has been made to solve such problems, and an object of the present invention is to provide a rolling bearing capable of actively adsorbing wear powder on a magnetic material.

このような目的を達成するために、本発明は、リング状の固定輪と、リング状の回転輪と、前記固定輪および前記回転輪間に転動自在に配設された複数の転動体と、前記転動体を転動可能に保持するポケットを円周方向に複数設けた保持器と、前記固定輪の両端に設けられたシールと、前記固定輪、前記回転輪および前記シールに囲まれた空間に設けられた潤滑油とを備えた転がり軸受において、前記転動体および前記シール間における前記回転輪の前記保持器側の周面に、前記潤滑油を一時的に貯留する環状溝を形成し、前記環状溝に一時的に貯留された前記潤滑油を、前記潤滑油に含まれる金属粉とともに掻き出す突起部を前記保持器の前記回転輪側の周面に、円周方向に少なくとも１箇所以上形成し、前記シールの前記回転輪側に掻き出された前記潤滑油中の前記金属粉を集約する磁性体を設け、前記環状溝の底面に前記潤滑油に含まれている前記金属粉を磁力でもって吸引する第２磁性体を円周方向に少なくとも１箇所以上配置したことを要旨としている。
In order to achieve such an object, the present invention includes a ring-shaped stationary wheel, a ring-shaped rotating wheel, and a plurality of rolling elements that are rotatably disposed between the stationary wheel and the rotating wheel. A cage that is provided with a plurality of circumferential pockets for holding the rolling elements in a rollable manner, seals provided at both ends of the fixed ring, and the fixed ring, the rotating ring, and the seal. In a rolling bearing provided with a lubricating oil provided in a space, an annular groove for temporarily storing the lubricating oil is formed on a peripheral surface on the cage side of the rotating wheel between the rolling element and the seal. And at least one protrusion in the circumferential direction on the peripheral surface of the retainer on the rotating wheel side of the retainer that scrapes the lubricating oil temporarily stored in the annular groove together with the metal powder contained in the lubricating oil. Forming and scraping on the rotating wheel side of the seal The magnetic provided to aggregate the metal powder of the lubricating oil that is, the metal powder contained in the lubricating oil on the bottom of the annular groove of the second magnetic body attracted with a magnetic force in the circumferential direction The gist is that at least one or more places .

本発明によると、環状溝によって潤滑油および摩耗粉を集めることができ、保持器の突起部によって、環状溝の潤滑油および摩耗粉を掻き出して飛ばすため、シールに設けた磁性体へ積極的に摩耗粉を吸着させることができる。   According to the present invention, the lubricating oil and the wear powder can be collected by the annular groove, and the lubricating oil and the wear powder in the annular groove are scraped off and blown off by the protrusion of the cage. Wear powder can be adsorbed.

さらに、第２磁性体により環状溝内の潤滑油に含まれる摩耗粉の含有率が高められ、保持器の突起部によって摩耗粉の含有率が高い潤滑油を突起部により掻き出して飛ばすため、シールに設けた磁性体へより積極的に摩耗粉を吸着させることができる。
In addition, the second magnetic body increases the content of wear powder contained in the lubricating oil in the annular groove, and the protruding portion of the cage causes the protruding portion to scrape away the lubricating oil having a high content of wear powder. The wear powder can be more actively adsorbed to the magnetic body provided on the surface.

本発明の転がり軸受によれば、鉄系粒子などの摩耗粉が軸受の軌道面に損傷を与える前に、シールの磁性体へ積極的に摩耗粉を吸着させることができる転がり軸受を提供できる。   According to the rolling bearing of the present invention, it is possible to provide a rolling bearing capable of positively adsorbing the wear powder to the magnetic body of the seal before the wear powder such as iron-based particles damages the raceway surface of the bearing.

本発明の転がり軸受の部分断面図Partial sectional view of the rolling bearing of the present invention 本発明の転がり軸受用保持器の斜視図The perspective view of the cage for rolling bearings of this invention 本発明の転がり軸受用保持器の図２Ａ−Ａ 断面図Sectional drawing of FIG. 2A-A of the cage for rolling bearings of this invention 本発明の転がり軸受用シールの側面図Side view of the rolling bearing seal of the present invention 図４のシールのＣ−Ｃ断面図CC sectional view of the seal of FIG. 第２実施例の転がり軸受の部分断面図Partial sectional view of the rolling bearing of the second embodiment

以下、本発明の第１の実施形態に係る転がり軸受装置について、添付図面を参照して説明する。図１には、本実施の形態の転がり軸受装置の構成例が示されている。   Hereinafter, a rolling bearing device according to a first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a configuration example of the rolling bearing device according to the present embodiment.

この発明の一実施形態を図１図２および図３と共に説明する。図１に示すように、この実施形態に係る転がり軸受１は、密閉型の深溝玉軸受であり、外輪２と、内輪４と、複数の玉６と、保持器８と、内外輪２，４間の軸受空間を塞ぐシール７，７とを有する。図１ではシール７として非接触シールが示されている。外輪２は内周に軌道面３を有し、内輪２はこの軌道面３に対向する軌道面５を有し、内輪２の軌道面５から両端面の間の外周面に断面矩形の潤滑油を保持する環状溝１０を有している。軌道面３，５間に複数の玉６を介在させ、保持器８が複数の玉６を保持している。前記軸受空間に潤滑油が封入され、環状溝１０に潤滑油が保持される。   An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a rolling bearing 1 according to this embodiment is a sealed deep groove ball bearing, and includes an outer ring 2, an inner ring 4, a plurality of balls 6, a cage 8, and inner and outer rings 2, 4. There are seals 7 and 7 for closing the bearing space between them. In FIG. 1, a non-contact seal is shown as the seal 7. The outer ring 2 has a raceway surface 3 on the inner periphery, the inner ring 2 has a raceway surface 5 opposite to the raceway surface 3, and a lubricating oil having a rectangular cross section on the outer peripheral surface between the raceway surface 5 and both end faces of the inner ring 2. It has the annular groove 10 which hold | maintains. A plurality of balls 6 are interposed between the raceway surfaces 3 and 5, and a cage 8 holds the plurality of balls 6. Lubricating oil is sealed in the bearing space, and the lubricating oil is held in the annular groove 10.

保持器８について説明する。
図２、図３に示すように、保持器８は、環状体８ａの円周方向に内部に玉６を保持するポケット８ｂを複数箇所に有する形状である。この保持器８は、例えば、合成樹脂を射出成形して形成されている。また、この保持器８は各ポケット８ｂの内面を単調な同一曲率から成る球面とし、各ポケット８ｂに玉６がはめ込まれることにより、軸方向、径方向、および円周方向への拘束がなされる転動体案内形式に構成されている。 The cage 8 will be described.
As shown in FIGS. 2 and 3, the cage 8 has a shape having pockets 8 b that hold the balls 6 inside in a circumferential direction of the annular body 8 a at a plurality of locations. The cage 8 is formed, for example, by injection molding synthetic resin. In addition, the cage 8 has a spherical surface having the same curvature as each inner surface of each pocket 8b, and the ball 6 is fitted into each pocket 8b, thereby restraining in the axial direction, the radial direction, and the circumferential direction. It is configured in a rolling element guide format.

前記環状体８ａの内周面８ｄからの円周方向へ一定の幅で端面８ｃの両端からそれぞれ半径方向に突出する一対の突起部９，９を設けている。これら一対の突起部９，９は、断面が略３角形で環状体８ａに一体成形されている。内輪４の環状溝１０と軸方向に対向し構成している。   A pair of projecting portions 9 and 9 projecting radially from both ends of the end surface 8c with a constant width in the circumferential direction from the inner peripheral surface 8d of the annular body 8a are provided. The pair of protrusions 9 and 9 have a substantially triangular cross section and are integrally formed with the annular body 8a. It is configured to face the annular groove 10 of the inner ring 4 in the axial direction.

前記保持器８は、このような突起部９，９は半径内側方向に突出しており、その先端９ａは内輪２に形成した、環状溝１０に内輪２の外周面２ａより寸法Ｌだけ入り込んで構成されている。   The retainer 8 has such protrusions 9 and 9 projecting radially inward, and a tip 9a of the retainer 8 is formed in the inner ring 2 and enters the annular groove 10 by a dimension L from the outer peripheral surface 2a of the inner ring 2. Has been.

保持器８の樹脂材料としては、ポリアミド（ナイロン６、ナイロン６６、ナイロン４６）樹脂、ポリアセタール樹脂、ポリエーテルエーテルケトン樹脂（ＰＥＥＫ）、ポリフェニレンサルファイド樹脂（ＰＰＳ）、ポリ四弗化エチレン（ＰＴＦＥ）等のエンジニアリングプラスチックの単体、またはそれにガラス繊維やカーボン繊維等の短繊維（補強材）を１０〜５０重量％程度含有させて強化した複合材等が用いられる。   Resin materials for the cage 8 include polyamide (nylon 6, nylon 66, nylon 46) resin, polyacetal resin, polyether ether ketone resin (PEEK), polyphenylene sulfide resin (PPS), polytetrafluoroethylene (PTFE), and the like. Or a composite material or the like that is reinforced by containing about 10 to 50% by weight of a short fiber (reinforcing material) such as glass fiber or carbon fiber.

以上説明した構成によると、保持器８において、一対の突起部９，９を半径方向に、内輪２の環状溝１０に突出して設けたため、一対の突起部９，９が内輪２の環状溝１０の潤滑油を回転ごとに掻き出す働きを有している。すなわち、環状溝によって集められた潤滑油および摩耗粉を、保持器の突起部によって、環状溝から掻き出してシール７側へ飛ばすことができる。そのため、常に潤滑油がシール７側と転動体側へ掻き出しながら、潤滑油の流動させる働きを有している。そのため、潤滑油に存在する摩耗粉を同時に循環させることができる。   According to the configuration described above, in the cage 8, the pair of protrusions 9, 9 are provided in the radial direction so as to protrude from the annular groove 10 of the inner ring 2. It has a function to scrape out the lubricating oil every rotation. That is, the lubricating oil and wear powder collected by the annular groove can be scraped out from the annular groove by the protrusion of the cage and can be blown to the seal 7 side. For this reason, the lubricating oil always has a function of allowing the lubricating oil to flow while being scraped to the seal 7 side and the rolling element side. Therefore, the wear powder present in the lubricating oil can be circulated simultaneously.

軸受の両側に装着されたシール７には、図４、図５に示すような短円筒部およびこれの左端にある内向きフランジ部からなる金属製の環状芯金７ｂと、芯金７ｂの短円筒部外周面および内向きフランジ部左側面に接着されかつ内輪４の肩部とでラビリンスを形成するシール部を有するゴムなどの弾性体７ａと、環状芯金７ｂの短円筒部が弾性体７ａを介して外輪２の両端部に圧入されて固定されている。シール７の先端部７ｃには、内輪２の外周面とラビリンスを形成して、それにより密封効果を維持するようになっている。先端部７ｃの保持器９側に断面矩形の磁性体２０が円周方向に等配に接着して設置されている。   The seals 7 mounted on both sides of the bearing are provided with a metal annular cored bar 7b composed of a short cylindrical part as shown in FIGS. 4 and 5 and an inward flange at the left end thereof, and a short of the cored bar 7b. An elastic body 7a such as rubber having a seal portion bonded to the outer peripheral surface of the cylindrical portion and the left side surface of the inward flange portion and forming a labyrinth with the shoulder portion of the inner ring 4, and a short cylindrical portion of the annular cored bar 7b are the elastic body 7a. Are pressed into both ends of the outer ring 2 and fixed. A labyrinth is formed with the outer peripheral surface of the inner ring 2 at the tip 7c of the seal 7, thereby maintaining a sealing effect. A magnetic body 20 having a rectangular cross-section is installed on the tip 9c on the side of the cage 9 so as to be evenly bonded in the circumferential direction.

このようなシール７において、磁性体２０は、軸受１の運転時に装置内に発生した鉄系粒子を含んだ磨耗粉に対して磁気吸着作用を与えることにより、当該磨耗粉が拡散する前に磁気的に捕捉する捕捉機能を有している。   In such a seal 7, the magnetic body 20 gives a magnetic adsorption action to the wear powder containing iron-based particles generated in the apparatus during the operation of the bearing 1, so that the magnetic powder 20 is magnetized before the wear powder diffuses. It has a capture function to capture automatically.

本実施の形態において、シール７に捕捉機能を付加する方法として、例えば図４に示す磁性体２０は、その全体が磁性を有する材料で形成されている。この場合、磁性を有する材料としては、例えば、鉄、ニッケル、コバルト、フェライト系・マルテンサイト系のステンレス、高炭素鋼、シリコンマンガン鋼、マンガンクロム鋼、クロムバナジウム鋼などの磁性体材料を適用することができる。   In the present embodiment, as a method for adding a capturing function to the seal 7, for example, the magnetic body 20 shown in FIG. 4 is entirely made of a magnetic material. In this case, as the material having magnetism, for example, a magnetic material such as iron, nickel, cobalt, ferritic / martensitic stainless steel, high carbon steel, silicon manganese steel, manganese chromium steel, or chromium vanadium steel is applied. be able to.

また、磁性を有しない材料(例えば、ゴムや樹脂)中に磁性体の粉末を混入することにより、全体として磁性を持たせても良い。磁性体形成方法の一例としては、合成ゴムに磁性粉末(フェライト粉末、サマリウムコバルト粉末など)を混入することでフェライトゴム磁石やサマリウムコバルトゴム磁石などの磁性体を形成することができる。同様に、塩素化ポリエチレンなどの熱可塑性樹脂に磁性粉末を混入することで樹脂製磁石を形成することができる。   Further, the magnetic property may be given as a whole by mixing a magnetic powder in a non-magnetic material (for example, rubber or resin). As an example of the magnetic body forming method, a magnetic body such as a ferrite rubber magnet or a samarium cobalt rubber magnet can be formed by mixing magnetic powder (ferrite powder, samarium cobalt powder, etc.) into synthetic rubber. Similarly, a resin magnet can be formed by mixing magnetic powder into a thermoplastic resin such as chlorinated polyethylene.

また、例えば図４に示すシール７は、その全体が磁性を有しない材料で形成されており、その１部には、磁性を有する材料で形成された磁性体２０が付加されている。この場合、磁性を有しない材料としては、例えば、ゴム、樹脂、或いは、オーステナイト系(１８Ｃｒ−８Ｎｉ系)のステンレス、銅、アルミニウム、真鍮などの非磁性体材料を適用することができる。この場合、外部に付加する磁性体２０としては、上述した磁性体材料や磁性体形成方法を適用することができるため、その説明は省略する。   For example, the seal 7 shown in FIG. 4 is entirely formed of a material having no magnetism, and a magnetic body 20 formed of a material having magnetism is added to a part thereof. In this case, as the material having no magnetism, for example, rubber, resin, or nonmagnetic material such as austenite (18Cr-8Ni system) stainless steel, copper, aluminum, or brass can be applied. In this case, since the magnetic material and the magnetic body forming method described above can be applied as the magnetic body 20 to be added to the outside, description thereof is omitted.

以上、本実施の形態によれば、例えば鉄道車両車軸用複列軸受の内部で鉄系粒子を含んだ摩耗粉が発生しても、シール７の磁性体２０の捕捉機能により摩耗粉が拡散する前に磁気的に捕捉することができる。この場合、また摩耗粉がラビリンスシールで噛み込むことが事前に防止されるため、内輪２の外周面に損傷を与えることは少ない。この結果、シール７の密封精度を高い状態に保持することができ、異物の浸入防止や潤滑油の漏洩防止を維持することが可能となる。   As described above, according to the present embodiment, for example, even if wear powder containing iron-based particles is generated inside a double-row bearing for a railcar axle, the wear powder diffuses due to the capturing function of the magnetic body 20 of the seal 7. It can be magnetically captured before. In this case, the wear powder is prevented from being bitten by the labyrinth seal in advance, so that the outer peripheral surface of the inner ring 2 is hardly damaged. As a result, the sealing accuracy of the seal 7 can be maintained at a high level, and it is possible to maintain the prevention of entry of foreign matters and the prevention of leakage of the lubricating oil.

さらに図６に示す第２の実施形態では、軸受け１００の内輪１０４の軌道面１０５から両端面の間の外周面に断面矩形の潤滑油を保持する環状溝１１０の溝底部１１０ａに磁性体１１５を接着して設けている。磁性体１１５は一箇所以上、シール７の円周状に等配に設けてもよい。
以上の構成によれば、環状溝１１０に設置した磁性体１１５により、潤滑油に含まれる摩耗粉を吸着しやすくして、一時的に集約して、含有濃度を高めた上で保持器１０８の突起１０９により飛ばされてシール１０７の磁性体１２０側へ吸着できるため、効率的に摩耗粉の集約できる。
さらに磁性体１１５と磁性体１２０の磁力の大きさをかえて（例えば、磁性体１２０の磁力を磁性体１１５より大きくする）形成することで外側にあるシール側の磁性体１２０に集めやすくなり、より効果的に摩耗粉を集約できる。 Further, in the second embodiment shown in FIG. 6, the magnetic body 115 is provided on the groove bottom 110 a of the annular groove 110 that holds the lubricating oil having a rectangular cross section on the outer peripheral surface between the raceway surface 105 and both end surfaces of the inner ring 104 of the bearing 100. Adhesion is provided. One or more magnetic bodies 115 may be provided at equal intervals around the circumference of the seal 7.
According to the above configuration, the magnetic body 115 installed in the annular groove 110 makes it easy to adsorb the wear powder contained in the lubricating oil, temporarily aggregates it, and increases the concentration of the retainer 108. Since it is blown off by the protrusion 109 and can be attracted to the magnetic body 120 side of the seal 107, the wear powder can be efficiently collected.
Furthermore, by changing the magnitude of the magnetic force of the magnetic body 115 and the magnetic body 120 (for example, making the magnetic force of the magnetic body 120 larger than that of the magnetic body 115 ), it becomes easier to collect the magnetic body 120 on the seal side on the outside, Wear powder can be collected more effectively.

本発明はこうした実施形態に何等限定されるものではなく、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。   The present invention is not limited to these embodiments, and can of course be implemented in various modes without departing from the gist of the present invention.

上述した実施形態は、図１のシール７として非接触シールを挙げた。他の実施形態として、シール７は、接触シールであっても良い。また、金属板からなるシール７を設けても良い。   In the embodiment described above, a non-contact seal is cited as the seal 7 in FIG. As another embodiment, the seal 7 may be a contact seal. Further, a seal 7 made of a metal plate may be provided.

上述した実施形態は、図１のシール７として金属製の環状芯金７ｂと、ゴム製の弾性体７ａとからなるものを使用した。他の実施形態として、シール７は、金属板のみで構成しても良い。   In the embodiment described above, the seal 7 shown in FIG. 1 is made of a metal annular cored bar 7b and a rubber elastic body 7a. As another embodiment, the seal 7 may be composed of only a metal plate.

２…外輪、４…内輪、６…転動体、７…シール、８…保持器、９…突起部、１０，１１０…環状溝、２０，１１５…磁性体   2 ... Outer ring, 4 ... Inner ring, 6 ... Rolling element, 7 ... Seal, 8 ... Retainer, 9 ... Projection, 10, 110 ... Circular groove, 20, 115 ... Magnetic body

Claims (1)

リング状の固定輪と、リング状の回転輪と、前記固定輪および前記回転輪間に転動自在に配設された複数の転動体と、前記転動体を転動可能に保持するポケットを円周方向に複数設けた保持器と、前記固定輪の両端に設けられたシールと、前記固定輪、前記回転輪および前記シールに囲まれた空間に設けられた潤滑油とを備えた転がり軸受において、
前記転動体および前記シール間における前記回転輪の前記保持器側の周面に、前記潤滑油を一時的に貯留する環状溝を形成し、
前記環状溝に一時的に貯留された前記潤滑油を、前記潤滑油に含まれる金属粉とともに掻き出す突起部を前記保持器の前記回転輪側の周面に、円周方向に少なくとも１箇所以上形成し、
前記シールの前記回転輪側に掻き出された前記潤滑油中の前記金属粉を集約する磁性体を設け、
前記環状溝の底面に前記潤滑油に含まれている前記金属粉を磁力でもって吸引する第２磁性体を円周方向に少なくとも１箇所以上配置したことを特徴とする転がり軸受。
A ring-shaped stationary wheel, a ring-shaped rotating wheel, a plurality of rolling elements that are rotatably disposed between the stationary wheel and the rotating wheel, and a pocket that holds the rolling elements in a rollable manner. In a rolling bearing comprising a plurality of cages provided in the circumferential direction, seals provided at both ends of the fixed ring, and lubricating oil provided in a space surrounded by the fixed ring, the rotating wheel and the seal ,
An annular groove for temporarily storing the lubricating oil is formed on a peripheral surface of the rotating wheel between the rolling element and the seal on the cage side,
Protrusions that scrape the lubricating oil temporarily stored in the annular groove together with the metal powder contained in the lubricating oil are formed on the peripheral surface on the rotating wheel side of the cage in at least one circumferential direction. And
The magnetic material to aggregate the metal powder of the lubricating oil scraped out on the rotating wheel side of the seal provided,
A rolling bearing , wherein at least one second magnetic body that attracts the metal powder contained in the lubricating oil with a magnetic force is arranged on the bottom surface of the annular groove in the circumferential direction .
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