JP2007010114A - Rolling bearing for transmission - Google Patents

Rolling bearing for transmission Download PDF

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Publication number
JP2007010114A
JP2007010114A JP2005195240A JP2005195240A JP2007010114A JP 2007010114 A JP2007010114 A JP 2007010114A JP 2005195240 A JP2005195240 A JP 2005195240A JP 2005195240 A JP2005195240 A JP 2005195240A JP 2007010114 A JP2007010114 A JP 2007010114A
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Prior art keywords
oil
bearing
inner ring
outer ring
rolling
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Yohei Kashiwakura
洋平 柏倉
Shigeru Okita
滋 沖田
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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
    • F16C33/72—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
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner 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
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • 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
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • 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
    • F16C33/7889—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to an inner race and extending toward the outer 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
    • F16C19/02—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
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/60—Oil repelling
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/61—Toothed gear systems, e.g. support of pinion shafts

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing for a transmission requiring a small amount of lubricating oil for securing the sufficient seizure resistance by eliminating sealing torque while maintaining sealability inside the bearing, shutting off intrusion of a foreign matter into a bearing space with lubricating oil outside the bearing repelled by oil repellent films containing oil repellent components less liable to wet with the lubricating oil, and applying only oil plating lubrication to the inside of the bearing to lower the torque of the whole bearing. <P>SOLUTION: In the rolling bearing 10 for the transmission, oil plating is applied to at least one of an inner ring 11, an outer ring 14 and a rolling element 17, the oil repellent films 22, 26 are formed on a seal end part, an outer peripheral face 12 of the inner ring 11 and an inner peripheral face 15 of the outer ring 14, and the rolling element 17 is subjected to quenching with the usage of steel including from 0.5-1.5 wt% or more of Si, and thereafter, tempering at high temperatures at 200-300°C. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、歯車変速機等のトランスミッションに用いられる防塵性および低トルク特性が要求されるトランスミッション用転がり軸受に関する。   The present invention relates to a rolling bearing for transmission that is required for dustproof and low torque characteristics used in a transmission such as a gear transmission.

従来、歯車変速機等のトランスミッションには、複数本の回転軸や多くの歯車（ギア）が組み込まれている。これら回転軸や歯車は、玉軸受や円筒ころ軸受等の転がり軸受によりハウジングや支持軸に対し回転自在に支持されている。   Conventionally, a transmission such as a gear transmission incorporates a plurality of rotating shafts and many gears. These rotary shafts and gears are rotatably supported with respect to the housing and the support shaft by rolling bearings such as ball bearings and cylindrical roller bearings.

一般的に、トランスミッション用転がり軸受は軸受空間を密封しない開放型が使用されているが、この様な変速機の内部には、運転時に上記歯車の噛み合い部分で発生する摩耗粉等、異物が多く存在している。そして、この様な異物が上記転がり軸受内に浸入すると、この異物により転がり接触部の表面に圧痕が形成され、この圧痕に基づいて、この表面が疲労、剥離（フレーキング）して破損に至り易くなる。   In general, the rolling bearings for transmission use open types that do not seal the bearing space. However, there are many foreign objects such as wear powder generated at the meshing part of the gear during operation. Existing. When such foreign matter enters the rolling bearing, an indentation is formed on the surface of the rolling contact portion by the foreign matter, and the surface is fatigued, peeled (flaked), and damaged based on the indentation. It becomes easy.

従来のトランスミッション用転がり軸受の一例として、圧痕のつき難い新材料を用いたり、熱処理を施したりすることにより、圧痕の形成を回避しようとする転がり軸受が知られている（例えば、特許文献１参照）。   As an example of a conventional rolling bearing for a transmission, there is known a rolling bearing that attempts to avoid formation of indentation by using a new material that does not easily form indentation or by performing heat treatment (see, for example, Patent Document 1). ).

また、従来のトランスミッション用転がり軸受の他の一例として、密封板を装着した転がり軸受が知られている（例えば、特許文献２参照）。   Further, as another example of a conventional transmission rolling bearing, a rolling bearing equipped with a sealing plate is known (see, for example, Patent Document 2).

図８に示すように、特許文献２に開示されたトランスミッション用転がり軸受８０は、代表的な歯車変速機のひとつである自動車用トランスミッション等の、金属系の異物が多く存在する環境で使用される転がり軸受であり、外周面の軸方向中間部に深溝型の内輪軌道８２を有する内輪８１と、内周面の軸方向中間部に深溝型の外輪軌道８４を有して内輪８１と同心に配置された外輪８３と、内輪軌道８２と外輪軌道８４との間に転動自在に配置された複数個の玉８５とを備える。これら複数個の玉８５は、保持器８６に設けられた複数のポケット８７内に、１個ずつ転動自在に保持されている。   As shown in FIG. 8, the rolling bearing 80 for transmission disclosed in Patent Document 2 is used in an environment where there are many metallic foreign matters, such as an automobile transmission which is one of typical gear transmissions. This is a rolling bearing and is arranged concentrically with the inner ring 81 having an inner ring 81 having a deep groove type inner ring raceway 82 at the axially intermediate portion of the outer peripheral surface and a deep groove type outer ring raceway 84 at the axially intermediate portion of the inner peripheral surface. The outer ring 83 and a plurality of balls 85 arranged between the inner ring raceway 82 and the outer ring raceway 84 so as to be freely rollable. The plurality of balls 85 are held in a plurality of pockets 87 provided in the holder 86 so as to be rollable one by one.

また、トランスミッション用転がり軸受８０は、外輪８３の両端部内周面にそれぞれ全周に亙って設けられた係止溝８８，８８に、密封板８９，８９の外周縁部を係止している。そして、密封板８９，８９に有するシールリップ９０，９０の先端縁部を、内輪８１の両端部外周面に形成したシール溝９１，９１の内側壁面９２，９２に摺接させている。   Moreover, the rolling bearing 80 for transmission is locking the outer peripheral edge part of the sealing plates 89 and 89 to the locking grooves 88 and 88 provided in the inner peripheral surface of the both ends of the outer ring | wheel 83 over the perimeter, respectively. . The leading edge portions of the seal lips 90, 90 included in the sealing plates 89, 89 are brought into sliding contact with the inner wall surfaces 92, 92 of the seal grooves 91, 91 formed on the outer peripheral surfaces of both ends of the inner ring 81.

このようなトランスミッション用転がり軸受８０は、各玉８５の転動に基づき、内輪８１を外嵌固定した軸部材（不図示）と、外輪８３を内嵌固定した外方部材（不図示）との相対回転を許容する。そして、外輪８３の両端部内周面に、それぞれの外周縁を係止した１対の密封板８９，８９は、外部に浮遊する塵芥、オイル、水等の異物が各玉８５を配置した軸受空間９３内に浸入しないようにする。   Such a transmission rolling bearing 80 is based on the rolling of each ball 85, and includes a shaft member (not shown) to which the inner ring 81 is fitted and fixed and an outer member (not shown) to which the outer ring 83 is fitted and fixed. Allow relative rotation. A pair of sealing plates 89 and 89 with the outer peripheral edges locked to the inner peripheral surfaces of both ends of the outer ring 83 are bearing spaces in which foreign particles such as dust, oil, water, etc. floating outside are arranged in the balls 85. Do not penetrate into 93.

また、従来のトランスミッション用転がり軸受の他の一例として、組み立て時に充填する潤滑油量を最小限に絞り、且つ、運転開始後において潤滑油を安定して供給するために、内輪・外輪に微量の潤滑油を塗布する、所謂、オイルプレーティング処理を施した転がり軸受が知られている（例えば、特許文献３参照）。   As another example of a conventional rolling bearing for a transmission, a small amount of lubricating oil is charged to the inner and outer rings in order to minimize the amount of lubricating oil to be filled at the time of assembly and to stably supply the lubricating oil after the start of operation. A so-called oil-plating rolling bearing that applies lubricating oil is known (see, for example, Patent Document 3).

さらに、従来のトランスミッション用転がり軸受の他の一例として、潤滑油を含浸させた保持器と内輪・外輪の軌道面の塗布潤滑油によって潤滑する転がり軸受が知られている（例えば、特許文献４参照）。
特開平１１−８０８３８号公報 特開２００２−３２７７６１号公報 特開昭６４−０４６０１１号公報 特開２０００−２３４６２５号公報 Further, as another example of a conventional transmission rolling bearing, there is known a rolling bearing which is lubricated by a cage impregnated with lubricating oil and lubricating oil applied to the raceway surfaces of the inner and outer rings (see, for example, Patent Document 4). ).
Japanese Patent Laid-Open No. 11-80838 JP 2002-327761 A Japanese Unexamined Patent Publication No. 64-046011 JP 2000-234625 A

ところが、上記特許文献１では、材料の製作に伴う設備の新設や、熱処理に掛かるコストがかかるという問題があり、実現がし難かった。   However, in the above-mentioned Patent Document 1, there is a problem that a new installation of equipment associated with the production of materials and a cost for heat treatment are required, which is difficult to realize.

また、上記特許文献２では、軸受内部の密封性を高めるためにシールリップ９０の先端縁部と、内輪８１の両端部外周面に形成したシール溝９１の内側壁面９２とが摺接しているため、これらの摩擦が軸受全体のトルクを増大させ、結果として、トランスミッションのエネルギー効率が低下してしまうという問題がある。これに対して、上記の摩擦を排除するためにシールを非接触型にすると、軸受外部の潤滑油やコンタミネーションなどの異物が軸受空間に浸入することにより軸受寿命の低下を招く虞がある。   Further, in Patent Document 2, the edge of the seal lip 90 and the inner wall surface 92 of the seal groove 91 formed on the outer peripheral surface of both ends of the inner ring 81 are in sliding contact with each other in order to improve the sealability inside the bearing. These frictions increase the torque of the entire bearing, and as a result, there is a problem that the energy efficiency of the transmission decreases. On the other hand, if the seal is made to be a non-contact type in order to eliminate the above-mentioned friction, foreign matters such as lubricating oil and contamination outside the bearing may enter the bearing space, which may lead to a reduction in bearing life.

また、上記特許文献３及び特許文献４では、歯車変速機の内部においては、潤滑油が激しく流動しているために軸受内部へ油が浸入してしまい、その結果、オイルプレーティングを施しても低トルク効果及びトルク変動抑制効果を期待できず、さらに、希少潤滑であるために、早期に焼付き損傷を起す虞がある。   Further, in Patent Document 3 and Patent Document 4 described above, in the gear transmission, since the lubricating oil is flowing vigorously, the oil enters the bearing, and as a result, even if oil plating is performed. The low torque effect and the torque fluctuation suppressing effect cannot be expected, and furthermore, since it is rare lubrication, there is a possibility that seizure damage may occur at an early stage.

本発明は、上述した事情に鑑みてなされたものであり、その目的は、軸受内部の密封性を維持しつつシールトルクを排除するとともに、潤滑油で濡らされにくい撥油成分を含む撥油膜によって軸受外部の潤滑油を弾いて軸受空間への異物の浸入を遮断することで寿命低下を防止し、軸受内部をオイルプレーティングによる潤滑のみとすることで軸受全体のトルクを低下させ、さらに微小量の潤滑油においても十分な耐焼付き性を確保することができるトランスミッション用転がり軸受を提供することにある。   The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an oil-repellent film containing an oil-repellent component that is not easily wetted by lubricating oil while eliminating the sealing torque while maintaining the sealing performance inside the bearing. Prevents the life from deteriorating by blocking the entry of foreign matter into the bearing space by repelling the lubricating oil outside the bearing, reducing the torque of the entire bearing by lubricating the inside of the bearing only with oil plating. Another object of the present invention is to provide a rolling bearing for a transmission that can secure sufficient seizure resistance even in the case of the lubricating oil.

１）本発明に係るトランスミッション用転がり軸受は、外周面に内輪軌道をもつ内輪と、内周面に外輪軌道をもつ外輪と、これら内輪軌道及び外輪軌道の間に転動自在に配置された転動体と、基端部が前記転動体に対して軸方向両側に装着され、先端部が前記内輪の外周面若しくは前記外輪の内周面のいずれか一方と互いに非接触に近接対向するシール板と、を具備するトランスミッション用転がり軸受であって、
前記内輪軌道、前記外輪軌道及び前記転動体の少なくともいずれか一つにオイルプレーティングが施され、前記シール先端部、若しくは該シール先端部と対向する前記内輪の外周面若しくは前記外輪の内周面の少なくとも一方に撥油膜を形成するとともに、少なくとも前記転動体が、素材にＳｉ含有量が０．５〜１．５重量％以上の鋼を用いて焼入れを行った後に、２００〜３００℃の高温焼戻しを施したことを特徴としている。 1) A rolling bearing for transmission according to the present invention includes an inner ring having an inner ring raceway on an outer peripheral surface, an outer ring having an outer ring raceway on an inner peripheral surface, and a rolling roller disposed between the inner ring raceway and the outer ring raceway. A moving body, and a seal plate having proximal end portions mounted on both sides in the axial direction with respect to the rolling element, and having a distal end portion in close proximity to and in contact with either the outer peripheral surface of the inner ring or the inner peripheral surface of the outer ring. A rolling bearing for a transmission comprising
Oil plating is applied to at least one of the inner ring raceway, the outer ring raceway, and the rolling element, and the outer peripheral surface of the inner ring or the inner peripheral surface of the outer ring that faces the seal front end portion. An oil-repellent film is formed on at least one of the rolling elements, and at least the rolling elements are quenched at a high temperature of 200 to 300 ° C. after quenching with a steel having a Si content of 0.5 to 1.5% by weight or more. It is characterized by tempering.

ここで、オイルプレーティングとしては、例えば鉱油や炭化水素系潤滑剤、脂肪酸エステル系潤滑剤、弗素系潤滑剤、シリコーン系潤滑剤等を、適当な溶剤（例えば、石油ベンジン、白灯油）に溶解させた液中に浸漬して溶剤を蒸発させたり、前記液を軸受に直接噴霧させたりするなどして実施される。   Here, as oil plating, for example, mineral oil, hydrocarbon lubricant, fatty acid ester lubricant, fluorine lubricant, silicone lubricant, etc. are dissolved in an appropriate solvent (for example, petroleum benzine, white kerosene). It is carried out by immersing in the liquid so as to evaporate the solvent or spraying the liquid directly on the bearing.

また、撥油剤を付着させて形成した撥油膜は、例えば、弗素系ポリマーで形成できる。すなわち、撥油性にはオイルプレーティング及び外部の潤滑剤で濡らされにくい成分を含んでいる。撥油性皮膜は、所定の部分に撥油膜を塗布することにより形成してもよい。必要に応じて、撥油剤を溶剤（例えば代替フロンや弗素系溶剤）で希釈して塗布すると、薄く均一な被膜を得ることができる。   The oil repellent film formed by attaching an oil repellent agent can be formed of, for example, a fluorine polymer. That is, the oil repellency includes components that are not easily wetted by the oil plating and external lubricant. The oil repellent film may be formed by applying an oil repellent film to a predetermined portion. If necessary, an oil repellent can be diluted with a solvent (for example, alternative chlorofluorocarbon or fluorine-based solvent) and applied to obtain a thin and uniform film.

上記１）に記載の発明によれば、軸受外部に存在する潤滑油は、シール板の先端部、内輪の外周面及び外輪の内周面の少なくともいずれか一つの表面に付着された撥油膜によって潤滑油が濡らされにくくなるために、軸受空間へ浸入しない。それにより、軸受の潤滑はオイルプレーティングによる微少量の油のみが担うこととなり、軸がり摩擦が減少する。また、潤滑油が微少量であるから攪拌抵抗も減少し、これらの結果、軸受トルクが低減される。さらに、微小量の潤滑油においても十分な耐焼付き性を確保することができる。そして、転動体の素材にＳｉ含有量が０．５〜１．５重量％の鋼を用いて焼入れを行い、２００〜３００℃の高温で焼戻し処理を施すことによって、相手部材である内輪の内輪軌道及び外輪の外輪軌道における表面疲労を抑制することができる。従って、軸受内部の密封性を維持しつつシールトルクを排除するとともに、潤滑油で濡らされにくい撥油成分を含む撥油膜によって軸受外部の潤滑油を弾いて軸受空間への異物の浸入を遮断し、軸受内部をオイルプレーティングによる潤滑のみとすることにより軸受全体のトルクを低下させることができ、さらに微小量の潤滑油においても十分な耐焼付き性を確保することができ、転動体の寿命を延ばして延命を図ることができる。   According to the invention described in 1) above, the lubricating oil existing outside the bearing is caused by the oil repellent film attached to at least one of the tip of the seal plate, the outer peripheral surface of the inner ring, and the inner peripheral surface of the outer ring. Since it is difficult for the lubricating oil to get wet, it does not enter the bearing space. As a result, the bearing is lubricated by only a small amount of oil by oil plating, and the shaft friction is reduced. Further, since the amount of the lubricating oil is very small, the stirring resistance is also reduced, and as a result, the bearing torque is reduced. Furthermore, sufficient seizure resistance can be ensured even with a minute amount of lubricating oil. And the inner ring | wheel of the inner ring | wheel which is a counterpart member by quenching using the steel of Si content 0.5 to 1.5 weight% to the raw material of a rolling element, and giving a tempering process at the high temperature of 200-300 degreeC. Surface fatigue in the outer ring track of the track and the outer ring can be suppressed. Therefore, while maintaining the sealability inside the bearing, the seal torque is eliminated, and the oil-repellent film containing an oil-repellent component that is difficult to get wet with the lubricant repels the lubricant outside the bearing and blocks foreign matter from entering the bearing space. By using only oil plating inside the bearing, the torque of the entire bearing can be reduced, and even with a small amount of lubricating oil, sufficient seizure resistance can be ensured, and the life of the rolling element can be increased. You can prolong your life.

本発明のトランスミッション用転がり軸受によれば、コストがかかる、エネルギー効率を低下させる、低トルク効果及びトルク変動抑制効果を期待できない、という問題を解消でき、これにより、軸受内部の密封性を維持しつつシールトルクを排除するとともに、潤滑油で濡らされにくい撥油成分を含む撥油膜によって軸受外部の潤滑油を弾いて軸受空間への異物の浸入を遮断し、軸受内部をオイルプレーティングによる潤滑のみとすることにより軸受全体のトルクを低下させることができ、さらに微小量の潤滑油においても十分な耐焼付き性を確保することができるという効果が得られる。   According to the rolling bearing for a transmission of the present invention, it is possible to solve the problems that cost is high, energy efficiency is lowered, low torque effect and torque fluctuation suppressing effect cannot be expected, and thereby maintaining the sealability inside the bearing. While eliminating the sealing torque, the oil-repellent film containing an oil-repellent component that is hard to get wet with the lubricating oil repels the lubricating oil outside the bearing and blocks the entry of foreign matter into the bearing space. As a result, the torque of the entire bearing can be reduced, and sufficient seizure resistance can be secured even with a small amount of lubricating oil.

以下、本発明に係る複数の実施の形態例を図面に基づいて詳細に説明する。
図１は本発明に係るトランスミッション用転がり軸受の第１実施形態の断面図、図２は図１に示すトランスミッション用転がり軸受の部分拡大図、図３は本発明に係るトランスミッション用転がり軸受の第２実施形態の断面図、図４は図３に示すトランスミッション用転がり軸受の部分拡大図、図５は本発明に係るトランスミッション用転がり軸受の第３実施形態の断面図、図６は本発明に係るトランスミッション用転がり軸受の焼付き性能試験の結果表である。 Hereinafter, a plurality of exemplary embodiments according to the present invention will be described in detail with reference to the drawings.
1 is a cross-sectional view of a first embodiment of a transmission rolling bearing according to the present invention, FIG. 2 is a partially enlarged view of the transmission rolling bearing shown in FIG. 1, and FIG. 3 is a second embodiment of the transmission rolling bearing according to the present invention. 4 is a partial enlarged view of the rolling bearing for transmission shown in FIG. 3, FIG. 5 is a sectional view of the rolling bearing for transmission according to the third embodiment of the present invention, and FIG. 6 is a transmission according to the present invention. It is a result table | surface of the seizure performance test of a rolling bearing for a motor.

図１に示すように、本発明の第１実施形態であるトランスミッション用転がり軸受１０は、外周面１２に内輪軌道１３をもつ内輪１１と、内周面１５に外輪軌道１６をもつ外輪１４と、これら内輪軌道１３及び外輪軌道１６の間に転動自在に配置された複数の転動体である玉１７と、玉１７に対して軸方向両側において、基端部である外周縁部が外輪１４の内周面に嵌着され、先端部である内周縁部が内輪１１の外周面１２の近傍まで延出した一対の環状のシール板１８，１８と、から構成されており、自動車用トランスミッション等の歯車変速機に組み込まれる。   As shown in FIG. 1, a transmission rolling bearing 10 according to a first embodiment of the present invention includes an inner ring 11 having an inner ring raceway 13 on an outer peripheral surface 12, an outer ring 14 having an outer ring raceway 16 on an inner peripheral surface 15, A ball 17 that is a plurality of rolling elements arranged so as to be able to roll between the inner ring raceway 13 and the outer ring raceway 16, and an outer peripheral edge portion that is a base end portion of the outer ring 14 on both sides in the axial direction with respect to the ball 17. A pair of annular seal plates 18 and 18 that are fitted to the inner peripheral surface and have an inner peripheral edge portion that is a tip portion extending to the vicinity of the outer peripheral surface 12 of the inner ring 11, such as an automobile transmission Built into the gear transmission.

また、トランスミッション用転がり軸受１０は保持器１９を有し、この保持器１９は、円周方向に等間隔に形成されたポケット２０内に玉１７を転動自在に保持している。この場合の保持器１９は波形プレス保持器である。   Moreover, the rolling bearing 10 for transmission has the holder | retainer 19, and this holder | retainer 19 hold | maintains the ball | bowl 17 so that rolling is possible within the pocket 20 formed in the circumferential direction at equal intervals. The cage 19 in this case is a corrugated press cage.

内輪１１は、外周面１２の軸方向中央部に深溝型の内輪軌道１３を配置しており、この内輪軌道１３の表面にオイルプレーティングを施したオイルプレーティング層２１が形成されている。そして、内輪１１は、外周面１２の軸方向両端部に撥油膜２２が形成されている。この撥油膜２２には、オイルプレーティング及び外部の潤滑油で濡らされにくい成分を含んでいる。   In the inner ring 11, a deep groove type inner ring raceway 13 is disposed in the axially central portion of the outer peripheral surface 12, and an oil plating layer 21 with oil plating is formed on the surface of the inner ring raceway 13. In the inner ring 11, oil repellent films 22 are formed at both axial ends of the outer peripheral surface 12. The oil repellent film 22 contains components that are not easily wetted by oil plating and external lubricating oil.

外輪１４は、内周面１５の軸方向中央部に深溝型の外輪軌道１６を配置しており、この外輪軌道１６の表面にオイルプレーティングを施したオイルプレーティング層２３が形成されている。そして、外輪１４は、内周面１５の軸方向両端部寄りに、シール板１８，１８を取り付けるための係止溝であるシール板固定部２４，２４を有する。   In the outer ring 14, a deep groove type outer ring raceway 16 is disposed in the axially central portion of the inner peripheral surface 15, and an oil plating layer 23 is formed on the surface of the outer ring raceway 16. The outer ring 14 has seal plate fixing portions 24 and 24, which are locking grooves for attaching the seal plates 18 and 18, near both axial ends of the inner peripheral surface 15.

玉１７は、表面にオイルプレーティングを施したオイルプレーティング層２５が形成されている。玉１７は、素材として、Ｓｉを０．５重量％以上２．０重量％以下含有する鋼を用い、表面窒素濃度が０．２重量％以上となるように浸炭窒化処理が施された後に、さらに高温焼戻しが施されている。また、玉１７は、表面部の残留オーステナイト量が、２０体積％以下である。また、玉１７は、高温焼き戻しが、２００〜３００℃の範囲である。そして、玉１７は、表面粗さが、内輪１１の内輪軌道１３と外輪１４の外輪軌道１６との表面粗さよりも小さい。さらに、玉１７は、表面部のＮ濃度が、０．２〜２．０重量％である。これにより、内輪１１の内輪軌道１３と外輪１４の外輪軌道１６との摩擦を低減させて相手部材表面の損傷が軽減され、その結果、転がり軸受１０の寿命を延長することができる。   The ball 17 has an oil plating layer 25 having an oil plating surface. The ball 17 is a steel containing 0.5 wt% or more and 2.0 wt% or less of Si as a material, and after carbonitriding is performed so that the surface nitrogen concentration is 0.2 wt% or more, Furthermore, high temperature tempering is performed. Further, the balls 17 have a retained austenite amount of the surface portion of 20% by volume or less. Moreover, the high-temperature tempering of the ball 17 is in the range of 200 to 300 ° C. The ball 17 has a surface roughness smaller than that of the inner ring raceway 13 of the inner ring 11 and the outer ring raceway 16 of the outer ring 14. Further, the ball 17 has an N concentration in the surface portion of 0.2 to 2.0% by weight. As a result, the friction between the inner ring raceway 13 of the inner ring 11 and the outer ring raceway 16 of the outer ring 14 is reduced to reduce the damage on the mating member surface. As a result, the life of the rolling bearing 10 can be extended.

玉１７に高窒素浸炭窒化処理を施す理由としては、玉１７と各軌道１３，１６との間での摩擦を低コストで低減することができるからである。各軌道１３，１６に使用しようとすると、内輪１１および外輪１４のいずれにも高窒素浸炭窒化処理を施す必要が生ずるためにコスト高になって好ましくない。内輪１１および外輪１４には、それらの負荷圏で繰り返しせん断応力が負荷されるために、異物混入下やすべりが起こり易い環境で使用する場合に残留オーステナイト量が必要になる。ただし、高速で使用されることにより焼付きが起こり易い場合等では、残留オーステナイト量が少ない方が耐焼付き性は良好になる。   The reason why the ball 17 is subjected to the high nitrogen carbonitriding process is that friction between the ball 17 and the tracks 13 and 16 can be reduced at a low cost. If it is going to use for each track | truck 13,16, since it will be necessary to perform a high nitrogen carbonitriding process to both the inner ring | wheel 11 and the outer ring | wheel 14, it will become expensive and is not preferable. Since the inner ring 11 and the outer ring 14 are repeatedly subjected to shear stress in their load zone, the amount of retained austenite is required when used in an environment where slipping easily occurs due to contamination with foreign matter. However, in the case where seizure is likely to occur due to use at a high speed, the seizure resistance is better when the amount of retained austenite is smaller.

以上のことから、玉１７に使用するのが効果的であり、内輪１１および外輪１４に使用する熱処理は、環境に応じて変更する必要がある。勿論、内輪１１および外輪１４に使用しても良いことは言うまでもない。   From the above, it is effective to use the ball 17 and the heat treatment used for the inner ring 11 and the outer ring 14 needs to be changed according to the environment. Needless to say, the inner ring 11 and the outer ring 14 may be used.

シール板１８は、内外輪１１，１４の間に玉１７が装着された後に、その外周縁部が外輪１４のシール板固定部２４に装着固定されることにより、その内周縁部が内輪１１の外周面１２に近接される非接触タイプである。シール板１８は、非接触タイプであるために、内輪１１に接触する接触タイプと比べてシールトルクが排除されるので、軸受全体のトルクを低減することができる。そして、シール板１８は、内輪１１の外周面１２における撥油膜２２に対向する内周縁部に撥油膜２６が形成されている。   After the ball 17 is mounted between the inner and outer rings 11, 14, the seal plate 18 is mounted and fixed on the seal plate fixing portion 24 of the outer ring 14, so that the inner periphery of the seal plate 18 is the inner ring 11. It is a non-contact type that is close to the outer peripheral surface 12. Since the seal plate 18 is a non-contact type, the seal torque is eliminated as compared with the contact type that contacts the inner ring 11, so that the torque of the entire bearing can be reduced. The seal plate 18 has an oil repellent film 26 formed on the inner peripheral edge of the outer peripheral surface 12 of the inner ring 11 facing the oil repellent film 22.

ここで、内輪１１の内輪軌道１３と、外輪１４の外輪軌道１６と、玉１７の表面部と、に施されたオイルプレーティング層２１，２３，２５は、例えば鉱油や炭化水素系潤滑剤、脂肪酸エステル系潤滑剤、弗素系潤滑剤、シリコーン系潤滑剤等を、適当な溶剤（例えば、石油ベンジン、白灯油）に溶解させた液中に浸漬して溶剤を蒸発させたり、前記液を軸受に直接噴霧させたりするなどして実施されるものである。オイルプレーティングにおける潤滑油の付着量は特に制限されることはなく、軸受に潤滑性を付与できる程度であればよい。なお、オイルプレーティングは、内輪軌道１３、外輪軌道１６及び玉１７のすべてに施すことが望ましいが、いずれか１つに施してもよい。   Here, the oil plating layers 21, 23, and 25 applied to the inner ring raceway 13 of the inner ring 11, the outer ring raceway 16 of the outer ring 14, and the surface portion of the ball 17 are, for example, mineral oil, hydrocarbon-based lubricant, A fatty acid ester-based lubricant, a fluorine-based lubricant, a silicone-based lubricant, etc. are immersed in a solution in an appropriate solvent (for example, petroleum benzine, white kerosene) to evaporate the solvent, It is carried out by spraying directly on the surface. The amount of the lubricating oil adhering to the oil plating is not particularly limited as long as it can impart lubricity to the bearing. The oil plating is preferably applied to all of the inner ring raceway 13, the outer ring raceway 16, and the balls 17, but may be applied to any one of them.

また、内輪１１の外周面１２における軸方向両端部に形成された撥油膜２２と、シール板１８の内周縁部に形成された撥油膜２６としては、例えば、弗素系ポリマーで形成された潤滑油を撥油可能な皮膜である。撥油膜２２，２６は、必要に応じて、撥油剤を溶剤（例えば代替フロンや弗素系溶剤）で希釈して塗布することにより、薄く均一な被膜を得ることができる。なお、撥油剤を付着させる部分は、内輪１１の外周面１２と、シール板１８の内周縁部である非接触部分の対向面のいずれか一方であれば足りるが、両方に付着させておくのが望ましい。また、転がり接触面である、玉１７の転動面、内輪軌道１３や外輪軌道１６以外の部分であれば、特に制約なく塗布してよい。   Further, as the oil repellent film 22 formed on both axial ends of the outer peripheral surface 12 of the inner ring 11 and the oil repellent film 26 formed on the inner peripheral edge of the seal plate 18, for example, a lubricating oil formed of a fluorine-based polymer Is an oil repellent coating. The oil repellent films 22 and 26 can be applied to a thin and uniform film by diluting and applying an oil repellent agent with a solvent (for example, alternative chlorofluorocarbon or fluorine-based solvent) as necessary. The part to which the oil repellent agent is attached may be either one of the outer peripheral surface 12 of the inner ring 11 and the opposing surface of the non-contact part which is the inner peripheral edge of the seal plate 18, but it should be attached to both. Is desirable. Further, any portion other than the rolling contact surface of the ball 17, the inner ring raceway 13, and the outer ring raceway 16, which is a rolling contact surface, may be applied without particular limitation.

図２に示すように、トランスミッション用転がり軸受１０は、内輪１１の外周面１２における軸方向両端部と、シール板１８の内周縁部と、に形成された撥油膜２２，２６によって、軸受外部に存在する潤滑油２７が弾かれて、これら部分に付着しないために、潤滑油２７は軸受空間へ浸入することがない。それにより、軸受の潤滑は、内輪１１の内輪軌道１３と、外輪１４の外輪軌道１６と、玉１７と、に施されたオイルプレーティング層２１，２３，２５による微少量の油のみが担うこととなり、転がり摩擦が減少する。また、潤滑油が微少量であるから撹拌抵抗も減少し、これらの結果、軸受トルクが低減される。   As shown in FIG. 2, the transmission rolling bearing 10 is disposed outside the bearing by oil repellent films 22 and 26 formed on both axial ends of the outer peripheral surface 12 of the inner ring 11 and the inner peripheral edge of the seal plate 18. Since the existing lubricating oil 27 is repelled and does not adhere to these portions, the lubricating oil 27 does not enter the bearing space. Thereby, the bearing is lubricated by only a small amount of oil by the oil plating layers 21, 23, 25 applied to the inner ring raceway 13 of the inner ring 11, the outer ring raceway 16 of the outer ring 14, and the balls 17. And rolling friction is reduced. Further, since the amount of the lubricating oil is very small, the stirring resistance is reduced, and as a result, the bearing torque is reduced.

このようなトランスミッション用転がり軸受１０における玉１７の素材としてのＳｉは、素材のマトリックスを強化する元素であって、製鋼時の脱酸剤として必要な元素であるが、鋼の焼戻し軟化抵抗性を向上させるのに有効な元素であり、また鋼に浸炭窒化処理を施す場合に表面部の窒素濃度を高くする作用がある元素である。これを踏まえて、玉１７の素材に、Ｓｉ含有量が０．５〜１．５重量％以上の鋼を用いて、焼入れを行った後に、２００〜３００℃の高温で焼戻し処理を施すことによって、相手部材の表面疲労を抑制する効果が得られる。ここで、Ｓｉ含有量の下限は、０．５重量％とする。その効果を得るために好ましいＳｉ含有量の下限は０．８重量％である。また、過剰に含有すると、素材の被削性を低下させ、素材の冷間加工性が著しく低下してコストの増大を招く恐れがあり、１．５重量％を超えると素材加工工程で生産性を阻害する虞がある。そのため、Ｓｉ含有量の上限は１．５重量％とすることが望ましい。   Si as the material of the balls 17 in such a rolling bearing 10 for transmission is an element that reinforces the matrix of the material and is an element necessary as a deoxidizer during steelmaking. It is an element effective for improving, and an element that has an effect of increasing the nitrogen concentration in the surface portion when carbonitriding is performed on steel. Based on this, the material of the ball 17 is tempered at a high temperature of 200 to 300 ° C. after quenching using steel having a Si content of 0.5 to 1.5% by weight or more. The effect of suppressing the surface fatigue of the mating member can be obtained. Here, the lower limit of the Si content is 0.5% by weight. In order to obtain the effect, the lower limit of the Si content is preferably 0.8% by weight. In addition, if contained excessively, the machinability of the material may be reduced, and the cold workability of the material may be significantly reduced, resulting in an increase in cost. May be disturbed. Therefore, the upper limit of the Si content is desirably 1.5% by weight.

玉１７は、焼戻し温度が低すぎると、相手部材の寿命を延長する効果が十分に得られなくなるために、２００〜２７０℃の範囲として、焼戻し温度の下限は２００℃とする。好ましくは、表面部の残留オーステナイト量が２０体積％未満となるように焼戻し温度を高くし、より好ましくは、表面部の残留オーステナイト量が１８体積％以下となるよう焼戻し温度を選定すると、相手部材の寿命をより効果的に延長することができる。一方、焼戻し温度を高くし過ぎると、硬さの低下及び残留オーステナイト量の不足によって寿命が低下し、返って軸受としての寿命が低下してしまうため、焼戻し温度の上限は２７０℃とする。このとき、玉１７の寿命低下によって軸受としての寿命が低下することを防止するためには、焼戻し温度を選定して表面部の残留オーステナイト量が７体積％以上とすることが好ましい。   When the tempering temperature of the balls 17 is too low, the effect of extending the life of the mating member cannot be obtained sufficiently. Therefore, the lower limit of the tempering temperature is set to 200 ° C. in the range of 200 to 270 ° C. Preferably, the tempering temperature is increased so that the amount of retained austenite in the surface portion is less than 20% by volume, and more preferably, the tempering temperature is selected so that the amount of retained austenite in the surface portion is 18% by volume or less. Can effectively extend the service life. On the other hand, if the tempering temperature is too high, the life is reduced due to the decrease in hardness and the amount of retained austenite, and the life as a bearing is lowered. Therefore, the upper limit of the tempering temperature is 270 ° C. At this time, in order to prevent the life of the bearing from being reduced due to a decrease in the life of the balls 17, it is preferable to select a tempering temperature and to set the amount of retained austenite at the surface portion to 7% by volume or more.

さらに、玉１７は、表面のＮ濃度を高くするほど相手部材の損傷を軽減する効果が高くなるため、表面Ｎ濃度の下限を０．２重量％以上とすることが好ましく、より好ましくは、０．５重量％以上とする。しかしながら、あまりにＮ濃度を高くしすぎると、脆弱な窒化層が形成されて、返って軸受としての寿命待性が低下する恐れがあるため、上限は２．０重量％とすることが望ましい。   Furthermore, the ball 17 has a higher effect of reducing damage to the mating member as the surface N concentration is increased. Therefore, the lower limit of the surface N concentration is preferably 0.2% by weight or more, more preferably 0. .5% by weight or more. However, if the N concentration is too high, a fragile nitrided layer may be formed and the life expectancy of the bearing may be lowered, so the upper limit is preferably set to 2.0% by weight.

また、浸炭窒化処理によってＮと同時に添加される表面部のＣの濃度については、転動部材として必要とされている表面硬さ６５０ＨＶの硬さが得られるように調整する必要がある。このため、表面部Ｃ濃度とＮ濃度の合計が０．８重量％以下となるようにＣ濃度を調整することが好ましい。より好ましくは表面部のＣ濃度をあまりにも高くし過ぎると、粗大な炭化物が析出して、玉１７そのものの寿命特性が低下してしまう恐れがあるため、上限を２．５重量％とすることが好ましく、より好ましくは２．０重量％以下とする。尚、相手部材の損傷低減の為には、金属接触が起こる表面の残留オーステナイト量や窒素濃度、あるいは炭素濃度が重要であり、本発明における表面部とは、最表面から少なくとも１μｍの範囲を意味する。   Moreover, it is necessary to adjust about the density | concentration of C of the surface part added simultaneously with N by carbonitriding so that the hardness of 650HV of surface hardness required as a rolling member is obtained. For this reason, it is preferable to adjust the C concentration so that the sum of the surface portion C concentration and the N concentration is 0.8 wt% or less. More preferably, if the C concentration in the surface portion is too high, coarse carbides may be precipitated and the life characteristics of the ball 17 itself may be lowered. Therefore, the upper limit should be 2.5% by weight. Is preferable, and more preferably 2.0% by weight or less. In order to reduce damage to the mating member, the amount of retained austenite, nitrogen concentration, or carbon concentration on the surface where metal contact occurs is important, and the surface portion in the present invention means a range of at least 1 μm from the outermost surface. To do.

次に、玉１７の素材として選択される元素における各数値の臨界的意義について説明する。   Next, the critical significance of each numerical value in the element selected as the material of the ball 17 will be described.

素材のＣ含有量０．５〜１．５重量％について、Ｃは基地をマルテンサイト化することにより強度を増加させるために必要な元素である。本発明の表面部においては、浸炭窒化処理によってＮと同時にＣを添加することが可能であるために、素材のＣ含有量は、完成状態での玉１７の心部が必要な強度を確保できる量であれば良いので、Ｃ含有量の下限を０．３重量％以上とする。より好ましくは、玉１７の心部硬さとしては、６５０ＨＶ以上とすることが望ましく、Ｃ含有量の下限を０．８重量％以上とすることが好ましい。   With respect to the C content of the material of 0.5 to 1.5% by weight, C is an element necessary for increasing the strength by converting the matrix into martensite. In the surface portion of the present invention, it is possible to add C simultaneously with N by carbonitriding, so that the C content of the material can ensure the strength required for the core of the ball 17 in the completed state. Therefore, the lower limit of the C content is set to 0.3% by weight or more. More preferably, the core hardness of the ball 17 is desirably 650 HV or more, and the lower limit of the C content is preferably 0.8 wt% or more.

しかしながら、素材のＣ含有量が余りに多すぎると、製鋼の段階で粗大な炭化物が生成して転動疲労特性を低下させる恐れがあるため、上限は１．５重量％とする。   However, if the C content of the raw material is too large, coarse carbides may be generated at the steelmaking stage and the rolling fatigue characteristics may be reduced, so the upper limit is set to 1.5% by weight.

素材のＭｎ含有量について、Ｍｎは、製鋼時の脱酸剤および脱硫剤として必要な元素であり、その効果を十分に得るためには、０．２０重量％以上含有することが好ましい。また、Ｍｎは、焼入れ性の向上に有効な元素でもあるため、０．２５重量％以上含有することがより好ましい。   About Mn content of a raw material, Mn is an element required as a deoxidizer and a desulfurization agent at the time of steelmaking, and in order to fully acquire the effect, it is preferable to contain 0.20 weight% or more. Moreover, since Mn is an element effective for improving hardenability, it is more preferable to contain 0.25% by weight or more.

しかしながら、その含有量をあまりに高くし過ぎると、非金属介在物が多くなり過ぎて寿命特性が低下する恐れがあり、また、素材の鍛造性および被削性等の機械加工性が低下するため、Ｍｎ含有量の上限は２．０重量％とする。   However, if the content is too high, the non-metallic inclusions may increase so much that the life characteristics may deteriorate, and the machinability such as the forgeability and machinability of the material will decrease. The upper limit of the Mn content is 2.0% by weight.

素材のＣｒ含有量について、Ｃｒは、焼入れ性及び焼戻し軟化抵抗性を向上させるのに有効な元素であり、基地を強化して転動疲労寿命特性を向上する作用がある。また、微細で高硬度な炭化物や炭窒化物を形成して、耐摩耗性を向上する働きもある。さらに、浸炭窒化層のＣ濃度を高める作用があり、浸炭窒化特性の向上にも有効な元素である。これらの作用・効果を十分に発揮させるためには、Ｃｒ含有量の下限を０．５重量％とする。   Regarding the Cr content of the material, Cr is an element effective for improving hardenability and temper softening resistance, and has the effect of strengthening the base and improving rolling fatigue life characteristics. It also has the function of improving wear resistance by forming fine and high hardness carbides and carbonitrides. Furthermore, it has the effect of increasing the C concentration of the carbonitriding layer, and is an effective element for improving the carbonitriding characteristics. In order to fully exhibit these actions and effects, the lower limit of the Cr content is 0.5% by weight.

しかしながら、多量に添加してもその効果が飽和してしまうばかりか、表面に不動体膜を形成することにより、返って浸炭窒化特性を阻害する恐れがあるため、Ｃｒ含有量の上限は２．０重量％とすることが好ましい。   However, even if it is added in a large amount, not only the effect is saturated, but also the formation of a non-moving body film on the surface may adversely affect the carbonitriding property, so the upper limit of the Cr content is 2. It is preferably 0% by weight.

素材のＯ含有量について、Ｏは、転動疲労寿命特性に有害な酸化物系の非金属介在物を形成するため、極力その含有量を低くする必要があり、含有量の上限を１２ｐｐｍとすることが好ましい。より好ましくは、９ｐｐｍ以下とする。   Regarding the O content of the material, O forms oxide-based non-metallic inclusions that are harmful to the rolling fatigue life characteristics. Therefore, it is necessary to reduce the content as much as possible, and the upper limit of the content is 12 ppm. It is preferable. More preferably, it is 9 ppm or less.

尚、上記合金元素以外にも、製鋼上不可避な量の不純物元素(例えばＰ，Ｓ，Ｎｉ，Ｃｕ，Ｍｏ，Ｖ，Ａｌ，Ｔｉ，Ｎｂ等)が含まれることは言うまでもない。また、ＭｏやＶ等の炭化物形成元素は、浸炭窒化処理によって微細で高硬度な炭窒化物を形成して耐摩耗性の向上に有効であるため、コストが許す限り微量に添加しても良いが、添加量上限は合計で２．０重量％以下とすることが好ましい。   In addition to the above alloy elements, it goes without saying that impurity elements inevitable in steelmaking (for example, P, S, Ni, Cu, Mo, V, Al, Ti, Nb, etc.) are included. Further, carbide forming elements such as Mo and V are effective for improving wear resistance by forming fine and high hardness carbonitride by carbonitriding, and may be added in a trace amount as long as the cost permits. However, the upper limit of the amount added is preferably 2.0% by weight or less in total.

また、玉１７の効果だけではなく、内輪１１と外輪１４との組合せにおいても長寿命化が図れることを見出した。表面損傷を低減するには、内外輪１１，１４の残留オーステナイトと硬さを増加することが効果的である。残留オーステナイトは圧痕縁での応力緩和に有効に働き、硬さは耐摩耗性や耐圧痕性に効果的であるため、内外輪１１，１４には浸炭処理や浸炭窒化処理を施すことが好ましい。しかしながら、浸炭処理は浸炭窒化処理と異なり、窒化物を形成しないために、浸炭窒化処理と比較して硬さが得られないため、より好ましくは浸炭窒化処理を施すことが効果的である。   Further, it has been found that not only the effect of the ball 17 but also the combination of the inner ring 11 and the outer ring 14 can extend the life. In order to reduce surface damage, it is effective to increase the retained austenite and hardness of the inner and outer rings 11 and 14. Residual austenite works effectively for stress relaxation at the indentation edge, and the hardness is effective for wear resistance and indentation resistance. Therefore, the inner and outer rings 11 and 14 are preferably subjected to carburizing or carbonitriding. However, unlike the carbonitriding process, the carburizing process does not form nitrides, so that hardness cannot be obtained as compared with the carbonitriding process. Therefore, it is more effective to perform the carbonitriding process.

上述したトランスミッション用転がり軸受１０によれば、軸受外部に存在する潤滑油２７は、シール板１８の先端部と、内輪１１の外周面１２と、の表面に付着された撥油膜２２，２６によって潤滑油２７が濡らされにくくなるために、軸受空間へ浸入しない。それにより、軸受の潤滑はオイルプレーティングによる微少量の油のみが担うこととなり、転がり摩擦が減少する。また、潤滑油が微小量であるから撹拌抵抗も減少し、これらの結果、軸受トルクが低減される。さらに、微小量の潤滑油においても十分な耐焼付き性を確保することができる。   According to the transmission rolling bearing 10 described above, the lubricating oil 27 existing outside the bearing is lubricated by the oil-repellent films 22 and 26 attached to the surfaces of the front end portion of the seal plate 18 and the outer peripheral surface 12 of the inner ring 11. Since the oil 27 is hardly wetted, it does not enter the bearing space. As a result, the bearing is lubricated only by a small amount of oil by oil plating, and rolling friction is reduced. Further, since the amount of lubricating oil is very small, the stirring resistance is also reduced, and as a result, the bearing torque is reduced. Furthermore, sufficient seizure resistance can be ensured even with a minute amount of lubricating oil.

そして、玉１７の素材にＳｉ含有量が０．５〜１．５重量％の鋼を用いて焼入れを行い、２００〜３００℃の高温で焼戻し処理を施すことによって、相手部材である内輪１１の内輪軌道１３及び外輪１４の外輪軌道１６における表面疲労を抑制することができる。従って、軸受内部の密封性を維持しつつシールトルクを排除するとともに、潤滑油２７で濡らされにくい撥油成分を含む撥油膜２２，２６によって軸受外部の潤滑油２７を弾いて軸受空間への異物の浸入を遮断し、軸受内部をオイルプレーティングによる潤滑のみとすることにより軸受全体のトルクを低下させることができ、さらに微小量の潤滑油においても十分な耐焼付き性を確保することができる。   And the material of the ball 17 is quenched with steel having a Si content of 0.5 to 1.5% by weight and tempered at a high temperature of 200 to 300 ° C. Surface fatigue in the outer ring raceway 16 of the inner ring raceway 13 and the outer ring 14 can be suppressed. Accordingly, while maintaining the sealing performance inside the bearing, the sealing torque is eliminated, and the lubricating oil 27 outside the bearing is repelled by the oil repellent films 22 and 26 containing the oil repellent component which is difficult to be wetted by the lubricating oil 27, so that the foreign matter to the bearing space. Therefore, the entire bearing can be lubricated only by lubrication by oil plating. Further, sufficient seizure resistance can be secured even with a small amount of lubricating oil.

次に、図３，図４を参照して、本発明に係るトランスミッション用転がり軸受の第２実施形態について説明する。なお、第２実施形態以下の各実施形態において、既に説明した部材等と同様な構成・作用を有する部材等については、図中に同一符号または相当符号を付することにより、説明を簡略化或いは省略する。   Next, a second embodiment of the rolling bearing for transmission according to the present invention will be described with reference to FIGS. In addition, in each embodiment following 2nd Embodiment, about the member etc. which have the structure and effect | action similar to the member already demonstrated, description is simplified by attaching | subjecting the same code | symbol or an equivalent code | symbol in a figure. Omitted.

図３に示すように、本発明の第２実施形態のトランスミッション用転がり軸受３０は、内輪１１の外周面１２の軸方向両端部寄りに、シール板１８，１８を取り付けるためのシール板固定部３１，３１を有し、シール板１８，１８の外周縁部に撥油膜３２が設けられているとともに、外輪１４の内周面１５に、シール板１８の撥油膜３２に対向して撥油膜３３が設けられている。これら撥油膜３２，３３には、オイルプレーティング及び外部の潤滑油で濡らされにくい成分を含んでいる。   As shown in FIG. 3, the rolling bearing 30 for transmission according to the second embodiment of the present invention has a seal plate fixing portion 31 for attaching seal plates 18, 18 near both axial ends of the outer peripheral surface 12 of the inner ring 11. , 31, and an oil repellent film 32 is provided on the outer peripheral edge of the seal plates 18, 18, and an oil repellent film 33 is provided on the inner peripheral surface 15 of the outer ring 14 so as to face the oil repellent film 32 of the seal plate 18. Is provided. These oil repellent films 32 and 33 contain components that are not easily wetted by oil plating and external lubricating oil.

そして、内輪軌道１３の表面にオイルプレーティングを施したオイルプレーティング層２１が形成されているとともに、外輪軌道１６の表面にオイルプレーティングを施したオイルプレーティング層２３が形成されており、玉１７の表面にオイルプレーティングを施したオイルプレーティング層２５が形成されている。   An oil plating layer 21 with oil plating is formed on the surface of the inner ring raceway 13, and an oil plating layer 23 with oil plating is formed on the surface of the outer ring raceway 16. An oil plating layer 25 is formed on the surface of 17 by oil plating.

図４に示すように、トランスミッション用転がり軸受３０は、シール板１８の外周縁部と、外輪１４の内周面１５における軸方向両端部と、に形成された撥油性皮膜３２，３３によって、軸受外部に存在する潤滑油２７が弾かれて、これら部分に付着しないために、潤滑油２７は軸受空間へ浸入することがない。それにより、軸受の潤滑は、内輪１１の内輪軌道１３におけるオイルプレーティング層２１と、外輪１４の外輪軌道１６におけるオイルプレーティング層２３と、玉１７のオイルプレーティング層２５と、による微少量の油のみが担うこことなり、転がり摩擦が減少する。また、潤滑油が微少量であるから撹拌抵抗も減少し、これらの結果、軸受トルクが低減される。   As shown in FIG. 4, the rolling bearing 30 for transmission is formed by an oil repellent coating 32, 33 formed on the outer peripheral edge portion of the seal plate 18 and both axial end portions of the inner peripheral surface 15 of the outer ring 14. Since the lubricating oil 27 existing outside is repelled and does not adhere to these portions, the lubricating oil 27 does not enter the bearing space. Thereby, the lubrication of the bearing is caused by a minute amount by the oil plating layer 21 in the inner ring raceway 13 of the inner ring 11, the oil plating layer 23 in the outer ring raceway 16 of the outer ring 14, and the oil plating layer 25 of the ball 17. This is where oil is only responsible, and rolling friction is reduced. Further, since the amount of the lubricating oil is very small, the stirring resistance is reduced, and as a result, the bearing torque is reduced.

トランスミッション用転がり軸受３０によれば、内輪軌道１３，外輪軌道１６，玉１７がオイルプレーティング層２１，２３，２５を有し、互いに非接触に近接対面するシール板１８の外周縁部に撥油膜３２が設けられているとともに、外輪１４の内周面１５に撥油膜３３が設けられているために、軸受外部に存在する潤滑油２７は、シール板１８の外周縁部に形成された撥油膜３２と、外輪１４の内周面１５に形成された撥油膜３３と、により弾かれることによってシール板１８の外周縁部及び外輪１４の内周面１５に付着せずに軸受空間へ浸入しない。それにより、軸受の潤滑は、内輪１１の内輪軌道１３と、外輪１４の外輪軌道１６と、玉１７と、に施されたオイルプレーティングによる微少量の油のみが担うこととなり、転がり摩擦が減少する。   According to the rolling bearing 30 for transmission, the inner ring raceway 13, the outer ring raceway 16, and the ball 17 have the oil plating layers 21, 23, 25, and the oil repellent film is formed on the outer peripheral edge portion of the seal plate 18 facing each other in close contact with each other. 32 and the oil repellent film 33 is provided on the inner peripheral surface 15 of the outer ring 14, the lubricating oil 27 existing outside the bearing is oil repellent film formed on the outer peripheral edge of the seal plate 18. 32 and the oil repellent film 33 formed on the inner peripheral surface 15 of the outer ring 14, so that it does not adhere to the outer peripheral edge of the seal plate 18 and the inner peripheral surface 15 of the outer ring 14 and does not enter the bearing space. As a result, the bearing is lubricated by only a small amount of oil from the oil plating applied to the inner ring raceway 13 of the inner ring 11, the outer ring raceway 16 of the outer ring 14, and the balls 17, thereby reducing rolling friction. To do.

また、潤滑油が微少量であるから撹拌抵抗も減少し、これらの結果、軸受トルクが低減される。さらに、微小量の潤滑油においても十分な耐焼付き性を確保することができる。そして、玉１７の素材にＳｉ含有量が０．５〜１．５重量％の鋼を用いて焼入れを行い、２００〜３００℃の高温で焼戻し処理を施すことによって、相手部材である内輪１１の内輪軌道１３及び外輪１４の外輪軌道１６における表面疲労を抑制することができる。   Further, since the amount of the lubricating oil is very small, the stirring resistance is reduced, and as a result, the bearing torque is reduced. Furthermore, sufficient seizure resistance can be ensured even with a minute amount of lubricating oil. And the material of the ball 17 is quenched with steel having a Si content of 0.5 to 1.5% by weight and tempered at a high temperature of 200 to 300 ° C. Surface fatigue in the outer ring raceway 16 of the inner ring raceway 13 and the outer ring 14 can be suppressed.

その結果、軸受内部の密封性を維持しつつシールトルクを排除するとともに、潤滑油２７で濡らされにくい撥油成分を含む撥油膜３２，３３によって軸受外部の潤滑油２７を弾いて軸受空間への異物の浸入を遮断し、軸受内部をオイルプレーティングによる潤滑のみとすることにより軸受全体のトルクを低下させることができ、さらに微小量の潤滑油においても十分な耐焼付き性を確保することができる。   As a result, the sealing torque is eliminated while maintaining the sealability inside the bearing, and the lubricating oil 27 outside the bearing is repelled by the oil repellent films 32 and 33 containing the oil repellent component which is not easily wetted by the lubricating oil 27 to the bearing space. By blocking the intrusion of foreign matter and only lubricating the inside of the bearing with oil plating, the torque of the entire bearing can be reduced, and sufficient seizure resistance can be secured even with a minute amount of lubricating oil. .

次に、図５を参照して、本発明に係るトランスミッション用転がり軸受の第３実施形態について説明する。   Next, a third embodiment of the rolling bearing for transmission according to the present invention will be described with reference to FIG.

図５に示すように、本発明の第３実施形態のトランスミッション用転がり軸受４０は、外輪１４の内周面１５の軸方向両端部寄りに、シール板１８，１８を取り付けるためのシール板固定部２４，２４を有し、内輪軌道１３の表面にオイルプレーティングを施したオイルプレーティング層２１が形成されている。また、外輪軌道１６の表面にオイルプレーティングを施したオイルプレーティング層２３が形成されており、玉１７の表面にオイルプレーティングを施したオイルプレーティング層２５が形成されている。   As shown in FIG. 5, the rolling bearing 40 for transmission according to the third embodiment of the present invention has a seal plate fixing portion for attaching seal plates 18, 18 near both axial ends of the inner peripheral surface 15 of the outer ring 14. An oil plating layer 21 having oil plating is formed on the surface of the inner ring raceway 13. An oil plating layer 23 with oil plating is formed on the surface of the outer ring raceway 16, and an oil plating layer 25 with oil plating is formed on the surface of the ball 17.

また、トランスミッション用転がり軸受４０は、各シール板１８の内周縁部に、円板形状の本体部４１から軸受内部の方向に折れ曲がって形成された環状の凸部４２を有している。そして、シール板１８の軸方向外側面に撥油膜４３が形成されているとともに凸部４２の内周面に撥油膜４４が形成されている。さらに、内輪１１の外周面１２に撥油膜４５が形成されているとともに内輪１１の端面に撥油膜４６が形成されている。これにより、互いに非接触に近接対面するシール板１８の凸部４２の内周面と、内輪１１の外周面１２と、の間に、シール板１８側の撥油膜４４と、内輪１１側の撥油膜４５と、で軸方向が囲まれたラビリンス隙間４７を形成することができる。これら撥油膜４３，４４，４５，４６には、オイルプレーティング及び外部の潤滑油で濡らされにくい成分を含んでいる。   Further, the transmission rolling bearing 40 has an annular convex portion 42 formed at the inner peripheral edge portion of each seal plate 18 by bending from the disc-shaped main body portion 41 toward the inside of the bearing. An oil repellent film 43 is formed on the outer surface in the axial direction of the seal plate 18, and an oil repellent film 44 is formed on the inner peripheral surface of the convex portion 42. Further, an oil repellent film 45 is formed on the outer peripheral surface 12 of the inner ring 11, and an oil repellent film 46 is formed on the end surface of the inner ring 11. Thus, the oil repellent film 44 on the seal plate 18 side and the repellent side on the inner ring 11 side are disposed between the inner peripheral surface of the convex portion 42 of the seal plate 18 facing each other in close contact with each other and the outer peripheral surface 12 of the inner ring 11. A labyrinth gap 47 surrounded by the oil film 45 in the axial direction can be formed. These oil repellent films 43, 44, 45, 46 contain components that are not easily wetted by oil plating and external lubricating oil.

トランスミッション用転がり軸受４０によれば、軸受外部に存在する潤滑油は、シール板１８の軸方向外側面に形成された撥油膜４３と、互いに非接触で近接対面するシール板１８の凸部４２の内周面に形成された撥油膜４４及び内輪１１の外周面１２に形成された撥油膜４５と、内輪１１の端面に形成された撥油性４６と、によって弾かれることにより、シール板１８の内周縁部と、内輪１１の外周面１２と、内輪１１の端面と、に付着せずに軸受空間へ浸入しない。そして、荷重が負荷されることによって内外輪１１，１４と玉１７とが弾性変形したり、軸受内部の隙間が大きくなったりして非接触部の隙間が大きくなって潤滑油を弾き難くなったとしても、潤滑油を確実に弾くことができる。それにより、軸受外部の潤滑油の浸入防止をより確実なものとすることができるために、軸受内部に軸受外部の潤滑油が浸入することがなくなり、異物による軸受の寿命低下を防止し、オイルプレーティングによる軸受トルク低減を図ることができる。   According to the rolling bearing 40 for transmission, the lubricating oil present outside the bearing is in contact with the oil-repellent film 43 formed on the outer surface in the axial direction of the seal plate 18 and the convex portion 42 of the seal plate 18 facing each other in close contact with each other. By being repelled by the oil repellent film 44 formed on the inner peripheral surface, the oil repellent film 45 formed on the outer peripheral surface 12 of the inner ring 11, and the oil repellency 46 formed on the end surface of the inner ring 11, It does not enter the bearing space without adhering to the peripheral edge, the outer peripheral surface 12 of the inner ring 11 and the end surface of the inner ring 11. When the load is applied, the inner and outer rings 11 and 14 and the ball 17 are elastically deformed, or the gap inside the bearing becomes large, and the gap in the non-contact portion becomes large, making it difficult to play the lubricating oil. Even so, the lubricating oil can be reliably repelled. As a result, it is possible to more reliably prevent the lubricating oil from entering the outside of the bearing, so that the lubricating oil outside the bearing does not enter the inside of the bearing. Bearing torque can be reduced by plating.

さらに、微小量の潤滑油においても十分な耐焼付き性を確保することができる。そして、玉１７の素材にＳｉ含有量が０．５〜１．５重量％の鋼を用いて焼入れを行い、２００〜３００℃の高温で焼戻し処理を施すことによって、相手部材である内輪１１の内輪軌道１３及び外輪１４の外輪軌道１６における表面疲労を抑制することができる。その結果、軸受内部の密封性を維持しつつシールトルクを排除するとともに、潤滑油で濡らされにくい撥油成分を含む撥油膜４３，４４，４５，４６によって軸受外部の潤滑油を弾いて軸受空間への異物の浸入を遮断し、軸受内部をオイルプレーティングによる潤滑のみとすることにより軸受全体のトルクを低下させることができ、さらに微小量の潤滑油においても十分な耐焼付き性を確保することができる。   Furthermore, sufficient seizure resistance can be ensured even with a minute amount of lubricating oil. And the material of the ball 17 is quenched with steel having a Si content of 0.5 to 1.5% by weight and tempered at a high temperature of 200 to 300 ° C. Surface fatigue in the outer ring raceway 16 of the inner ring raceway 13 and the outer ring 14 can be suppressed. As a result, while eliminating the sealing torque while maintaining the sealing performance inside the bearing, the bearing space is repelled by the lubricating oil outside the bearing by the oil repellent films 43, 44, 45, and 46 containing the oil repellent component that is not easily wetted by the lubricating oil. By blocking the intrusion of foreign matter into the bearing and by only lubricating the inside of the bearing with oil plating, the torque of the entire bearing can be reduced, and sufficient seizure resistance can be secured even with a small amount of lubricating oil. Can do.

また、トランスミッション用転がり軸受４０によれば、シール板１８の外周縁部に有する円環状の凸部４２が、内輪１１の外周面１２に対向配置されるために、シール板１８の凸部４２と、内輪１１の外周面１２との間にラビリンス隙間４７を確実に形成することができるために、密封性能を、より向上させることができ、シール板１８が非接触となるために、シール摺動によるトルク増大を回避することができる。   Further, according to the rolling bearing 40 for transmission, the annular convex portion 42 provided on the outer peripheral edge portion of the seal plate 18 is disposed opposite to the outer peripheral surface 12 of the inner ring 11. Since the labyrinth gap 47 can be reliably formed between the outer ring 12 and the inner ring 11, the sealing performance can be further improved, and the seal plate 18 becomes non-contact, so that the seal sliding Torque increase due to can be avoided.

（実施例）
次に、図６を参照して、本発明に係るトランスミッション用転がり軸受の作用・効果を確認するために行った実施例について説明する。なお、比較例として、従来構造をもつＢ１，Ｂ２，Ｂ３の３種類のトランスミッション用転がり軸受相当品を用意し、実施例として、本発明の構造をもつＡ１，Ａ２，Ａ３の３種類のトランスミッション用転がり軸受相当品を用意した。 (Example)
Next, with reference to FIG. 6, the Example performed in order to confirm the effect | action and effect of the rolling bearing for transmission which concerns on this invention is demonstrated. As comparative examples, three types of transmission rolling bearings equivalent to B1, B2, and B3 having a conventional structure are prepared. As an example, for three types of transmissions A1, A2, and A3 having the structure of the present invention. Rolling bearing equivalents were prepared.

[焼付き性能試験条件]
試験軸受：６２０６ＶＶ５
アキシアル荷重：５８８０Ｎ
ラジアル荷重：０Ｎ
回転数：１００００ｍｉｎ−１
[比較例仕様]
Ｓｉ含有量：０．２５％
焼戻し温度：１６０〜１９０℃
残留オーステナイト量：９〜１１％
[実施例仕様]
オイルプレーティング使用油：ギアオイル
撥油剤：弗素系ポリマー
Ｓｉ含有量：０．６％
焼戻し温度：２４０℃
残留オーステナイト量：３％ [Seizure performance test conditions]
Test bearing: 6206VV5
Axial load: 5880N
Radial load: 0N
Rotational speed: 10000 min -1
[Comparative example specifications]
Si content: 0.25%
Tempering temperature: 160-190 ° C
Residual austenite amount: 9 to 11%
[Example specifications]
Oil plating oil used: Gear oil Oil repellent: Fluorine polymer Si content: 0.6%
Tempering temperature: 240 ° C
Residual austenite amount: 3%

焼付き性能試験の結果、従来例に相当する、Ｂ１は６時間経過時に、Ｂ２は１時間経過時に、Ｂ３は６時間経過時に、それぞれ１時間経過時から６時間経過時の間で焼付きが確認された。これに対して、本発明に相当する、Ａ１は３５時間以上経過した３６時間経過後に、Ａ２は３０時間以上経過した３１時間経過後に、Ａ３は２０時間以上経過した２４時間経過後まで焼付きを確認することがなかった。   As a result of the seizure performance test, seizure was confirmed between 1 hour and 6 hours when B1 is 6 hours, B2 is 1 hour, and B3 is 6 hours, corresponding to the conventional example. It was. On the other hand, A1 corresponds to the present invention after 36 hours after 35 hours have elapsed, A2 after 31 hours after 30 hours, and A3 after 24 hours after 20 hours have elapsed. There was no confirmation.

これにより、本発明に係るトランスミッション用転がり軸受が、軸受内部の密封性を維持しつつシールトルクを排除するとともに、潤滑油で濡らされにくい撥油成分を含む撥油膜によって軸受外部の潤滑油を弾いて軸受空間への異物の浸入を遮断し、軸受内部をオイルプレーティングによる潤滑のみとすることにより軸受全体のトルクを低下させることができ、さらに微小量の潤滑油においても十分な耐焼付き性を確保できるからであることがわかる。   As a result, the transmission rolling bearing according to the present invention eliminates the sealing torque while maintaining the sealability inside the bearing, and repels the lubricating oil outside the bearing by the oil repellent film containing the oil repellent component that is not easily wetted by the lubricating oil. By blocking the intrusion of foreign matter into the bearing space and lubricating the interior of the bearing only with oil plating, the torque of the entire bearing can be reduced, and sufficient seizure resistance can be achieved even with a small amount of lubricating oil. It can be seen that it can be secured.

なお、本発明は、前述した実施形態に限定されるものではなく、適宜、変形、改良等が可能である。例えば、シール板としては、非接触タイプのものであれば良く、例えばゴム製、金属製、プラスチック製など、特に制約なく使用することができる。芯金の回りに樹脂を成形したシール板でも良い。   In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. For example, the seal plate may be of a non-contact type, and can be used without any particular limitation, for example, made of rubber, metal or plastic. A seal plate in which a resin is molded around the core metal may be used.

また、第３実施形態において、シール板が内輪に装着固定され、外周縁部が外輪に摺接しない非接触の場合に適用することもできる。もちろん、それらの場合に、凸部は外輪側に形成される。   Further, in the third embodiment, the present invention can also be applied to a case where the seal plate is mounted and fixed to the inner ring and the outer peripheral edge portion is not in contact with the outer ring without contact. Of course, in those cases, the convex portion is formed on the outer ring side.

また、ラビリンス隙間の形状は、図示した形状に限定されることはなく、これらの形状以外でも密封力が得られる範囲で種々の形状にすることができる。   Further, the shape of the labyrinth gap is not limited to the illustrated shapes, and can be various shapes other than these shapes as long as a sealing force can be obtained.

また、トランスミッション用転がり軸受としては、図示したものに限らず、保持器の無いタイプや、ころ軸受等、様々な軸受に本発明を適用しても良い。   Further, the transmission rolling bearing is not limited to the illustrated one, and the present invention may be applied to various bearings such as a type without a cage and a roller bearing.

本発明に係るトランスミッション用転がり軸受の第１実施形態の断面図である。It is sectional drawing of 1st Embodiment of the rolling bearing for transmissions which concerns on this invention. 図１に示したトランスミッション用転がり軸受の部分拡大図である。It is the elements on larger scale of the rolling bearing for transmission shown in FIG. 本発明に係るトランスミッション用転がり軸受の第２実施形態の断面図である。It is sectional drawing of 2nd Embodiment of the rolling bearing for transmissions which concerns on this invention. 図３に示したトランスミッション用転がり軸受の部分拡大図である。FIG. 4 is a partial enlarged view of the transmission rolling bearing shown in FIG. 3. 本発明に係るトランスミッション用転がり軸受の第３実施形態の断面図である。It is sectional drawing of 3rd Embodiment of the rolling bearing for transmissions which concerns on this invention. 本発明に係るトランスミッション用転がり軸受の焼付き性能試験の結果表である。It is a result table of the seizure performance test of the rolling bearing for transmission which concerns on this invention. 従来のトランスミッション用転がり軸受の断面図である。It is sectional drawing of the conventional rolling bearing for transmissions.

符号の説明Explanation of symbols

１０，３０，４０ トランスミッション用転がり軸受
１１ 内輪
１２ 外周面
１３ 内輪軌道
１４ 外輪
１５ 内周面
１６ 外輪軌道
１７ 玉（転動体）
１８ シール板
２１，２３，２５ オイルプレーティング層
２２，２６ 撥油膜
２７ 潤滑油
３２，３３ 撥油膜
４３，４４ 撥油膜
４５，４６ 撥油膜 10, 30, 40 Transmission rolling bearing 11 Inner ring 12 Outer surface 13 Inner ring raceway 14 Outer ring 15 Inner circumference 16 Outer ring raceway 17 Ball (rolling element)
18 Seal plate 21, 23, 25 Oil plating layer 22, 26 Oil repellent film 27 Lubricating oil 32, 33 Oil repellent film 43, 44 Oil repellent film 45, 46 Oil repellent film

Claims (1)

外周面に内輪軌道をもつ内輪と、内周面に外輪軌道をもつ外輪と、これら内輪軌道及び外輪軌道の間に転動自在に配置された転動体と、基端部が前記転動体に対して軸方向両側に装着され、先端部が前記内輪の外周面若しくは前記外輪の内周面のいずれか一方と互いに非接触に近接対向するシール板と、を具備するトランスミッション用転がり軸受であって、
前記内輪軌道、前記外輪軌道及び前記転動体の少なくともいずれか一つにオイルプレーティングが施され、前記シール先端部、若しくは該シール先端部と対向する前記内輪の外周面若しくは前記外輪の内周面の少なくとも一方に撥油膜を形成するとともに、少なくとも前記転動体が、素材にＳｉ含有量が０．５〜１．５重量％以上の鋼を用いて焼入れを行った後に、２００〜３００℃の高温焼戻しを施したことを特徴とするトランスミッション用転がり軸受。 An inner ring having an inner ring raceway on the outer peripheral surface, an outer ring having an outer ring raceway on the inner peripheral surface, a rolling element disposed so as to be able to roll between the inner ring raceway and the outer ring raceway, and a base end portion with respect to the rolling element A rolling bearing for a transmission comprising a seal plate mounted on both sides in the axial direction and having a front end portion in close contact with the outer peripheral surface of the inner ring or the inner peripheral surface of the outer ring in close contact with each other;
Oil plating is applied to at least one of the inner ring raceway, the outer ring raceway, and the rolling element, and the outer peripheral surface of the inner ring or the inner peripheral surface of the outer ring that faces the seal front end portion. An oil-repellent film is formed on at least one of the rolling elements, and at least the rolling elements are quenched at a high temperature of 200 to 300 ° C. after quenching with a steel having a Si content of 0.5 to 1.5% by weight or more. Rolling bearing for transmission characterized by tempering.
JP2005195240A 2005-07-04 2005-07-04 Rolling bearing for transmission Pending JP2007010114A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009015855A1 (en) * 2007-08-01 2009-02-05 Ab Skf Coated bearing
WO2010099776A1 (en) * 2009-03-06 2010-09-10 Schaeffler Technologies Gmbh & Co. Kg Sealing assembly for a rolling bearing and spherical rolling bearing comprising the sealing assembly
WO2012062608A1 (en) 2010-11-12 2012-05-18 Schaeffler Technologies AG & Co. KG Sealed anti-friction bearing
JP2012167809A (en) * 2011-01-27 2012-09-06 Nsk Ltd Rolling bearing
WO2014094755A1 (en) * 2012-12-20 2014-06-26 Schaeffler Technologies AG & Co. KG Bearing
DE102015201174A1 (en) * 2015-01-23 2016-07-28 Aktiebolaget Skf Coated bearing and process for its production
EP2644920A3 (en) * 2012-03-30 2018-02-21 Schaeffler Technologies AG & Co. KG Rolling bearing with a sealing element clamped in a groove in the face of a bearing ring
CN116447234A (en) * 2023-04-19 2023-07-18 浙江恒嘉轴承有限公司 Bearing forging and forging method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009015855A1 (en) * 2007-08-01 2009-02-05 Ab Skf Coated bearing
WO2010099776A1 (en) * 2009-03-06 2010-09-10 Schaeffler Technologies Gmbh & Co. Kg Sealing assembly for a rolling bearing and spherical rolling bearing comprising the sealing assembly
WO2012062608A1 (en) 2010-11-12 2012-05-18 Schaeffler Technologies AG & Co. KG Sealed anti-friction bearing
US8956052B2 (en) 2010-11-12 2015-02-17 Schaeffler Technologies AG & Co. KG Sealed anti-friction bearing
JP2012167809A (en) * 2011-01-27 2012-09-06 Nsk Ltd Rolling bearing
EP2644920A3 (en) * 2012-03-30 2018-02-21 Schaeffler Technologies AG & Co. KG Rolling bearing with a sealing element clamped in a groove in the face of a bearing ring
WO2014094755A1 (en) * 2012-12-20 2014-06-26 Schaeffler Technologies AG & Co. KG Bearing
US9581201B2 (en) 2012-12-20 2017-02-28 Schaeffler Technologies AG & Co. KG Bearing
DE102015201174A1 (en) * 2015-01-23 2016-07-28 Aktiebolaget Skf Coated bearing and process for its production
CN116447234A (en) * 2023-04-19 2023-07-18 浙江恒嘉轴承有限公司 Bearing forging and forging method
CN116447234B (en) * 2023-04-19 2023-11-17 浙江恒嘉轴承有限公司 Bearing forging and forging method

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