JP2008045711A - Tapered roller bearing - Google Patents

Tapered roller bearing Download PDF

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JP2008045711A
JP2008045711A JP2006224143A JP2006224143A JP2008045711A JP 2008045711 A JP2008045711 A JP 2008045711A JP 2006224143 A JP2006224143 A JP 2006224143A JP 2006224143 A JP2006224143 A JP 2006224143A JP 2008045711 A JP2008045711 A JP 2008045711A
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tapered roller
roller bearing
oil
lubricating oil
outer ring
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Kohei Yamaguchi
高平 山口
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JTEKT Corp
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JTEKT Corp
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Priority to JP2006224143A priority Critical patent/JP2008045711A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4676—Details of individual pockets, e.g. shape or roller retaining means of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of the rollers

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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 tapered roller bearing which is easy in feeding lubricating oil to a large flange, and to a large flange face with which a tapered roller contacts with, and effectively prevents seizing. <P>SOLUTION: An oil introducer 6 which introduces the flow of the lubricating oil flowing to the large diameter side from the small diameter side accompanied by the rolling of the tapered roller 4 to the inside of the radial direction, is formed on the internal face 52 of a pocket of a cage 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は円錐ころ軸受に関するものである。   The present invention relates to a tapered roller bearing.

特開２００４−８４７９９号公報JP 2004-84799 A

自動車の変速機等に用いられる円錐ころ軸受は、内輪と外輪との間に複数の円錐ころが保持器により保持された状態で介装され、円錐ころの転動によって内輪と外輪の相対回転が可能にされている。そして、内輪に形成された大鍔部と小鍔部によって円錐ころが内側円錐軌道に案内される。   A tapered roller bearing used in an automobile transmission or the like is provided with a plurality of tapered rollers held by a cage between an inner ring and an outer ring, and the relative rotation of the inner ring and the outer ring is caused by the rolling of the tapered rollers. Has been made possible. The tapered roller is guided to the inner conical track by the large collar part and the small collar part formed on the inner ring.

一般に円錐ころ軸受は円錐ころが回転することで動作時に軸受内に流入する潤滑油を攪拌している。この潤滑油が多いと攪拌抵抗が大きくなるので、近年、車両の燃費向上の観点から、潤滑油を少量にして攪拌抵抗を小さくし、トルク損失を低減することが望まれている。   In general, tapered roller bearings agitate the lubricating oil flowing into the bearing during operation as the tapered rollers rotate. Since the agitation resistance increases when the amount of the lubricating oil is large, in recent years, it has been desired to reduce the agitation resistance by reducing the amount of the lubricating oil to reduce the torque loss from the viewpoint of improving the fuel efficiency of the vehicle.

しかし潤滑油を少量にすると、上述の円錐ころ端面とすべりを生じて摩擦の大きい大鍔部に潤滑油が十分に供給されず、大鍔面に焼き付きが発生する問題がある。潤滑油は、円錐ころの回転によって生じるポンプ作用により、保持器と内輪の間から軸受内に入り、遠心力によってラジアル方向外側へ流動し、軸受外へ抜けていく。そのため潤滑油は大鍔面へ届きにくくなっており、ここで上述の理由から潤滑油を少量にすると一層届きにくくなって、焼き付きが発生しやすくなる。   However, when the amount of the lubricating oil is small, the end face of the tapered roller is slipped, and the lubricating oil is not sufficiently supplied to the large flange portion where friction is large, and there is a problem that seizure occurs on the large flange surface. Lubricating oil enters the bearing from between the cage and the inner ring by the pump action generated by the rotation of the tapered roller, flows outward in the radial direction by centrifugal force, and escapes out of the bearing. For this reason, the lubricating oil is difficult to reach the surface of the large surface. If the amount of the lubricating oil is made small for the above-described reason, it becomes more difficult to reach and seizure is likely to occur.

この問題を解決するため特許文献１には、保持器の柱部に軸方向に潤滑油案内溝を形成することにより、潤滑油を供給しやすくした円錐ころ軸受が開示されている。   In order to solve this problem, Patent Document 1 discloses a tapered roller bearing in which lubricating oil is easily supplied by forming a lubricating oil guide groove in the axial direction in a column portion of a cage.

しかし上記発明でも潤滑油の供給は十分ではなく、大鍔面への潤滑油の供給をより効果的に行える円錐ころ軸受が望まれていた。   However, even in the above-described invention, the supply of the lubricating oil is not sufficient, and a tapered roller bearing capable of more effectively supplying the lubricating oil to the large collar surface has been desired.

本発明の課題は、大鍔部と円錐ころが接触する大鍔面へ潤滑油を供給しやすく、焼き付きを効果的に防止できる円錐ころ軸受を提供することにある。   An object of the present invention is to provide a tapered roller bearing which can easily supply lubricating oil to a large collar surface where the large collar portion and the tapered roller are in contact with each other and can effectively prevent seizure.

課題を解決するための手段および発明の効果Means for Solving the Problems and Effects of the Invention

上記課題を解決するために本発明の円錐ころ軸受は、
転動体をなす円錐ころの軌道となる外側円錐軌道面がアキシャル方向の第二側から第一側に向けて拡径する形で内周面に形成された外輪と、
その外輪と同心に配置され、外輪との間に介装された複数個の円錐ころによって外輪に対して軸線周りに相対回転可能にされた内輪であって、円錐ころの軌道となる内側円錐軌道面がアキシャル方向の第二側から第一側へ向けて拡径する形で外周面に形成されるとともに、内側円錐軌道面の第一側に隣接する形でラジアル方向外向きに突出形成され、内側円錐軌道面上の円錐ころの大径端面のアキシャル方向位置を規制する大鍔部を有した内輪と、
外輪と内輪との間の転動体保持空間に配置され、複数個の円錐ころをそれぞれ転動可能に収容保持するポケット部が周方向に予め定められた間隔にて形成されるとともに、円錐ころの転動に伴って転動体保持空間の第二側の端部から第一側の端部に向けて生ずる潤滑油の流れをラジアル方向内向きに誘導する油誘導部が、周方向におけるポケット部の内側面に形成された保持器と、
を備えることを特徴とする。 In order to solve the above problems, the tapered roller bearing of the present invention is
An outer ring formed on the inner peripheral surface in such a manner that the outer conical raceway surface that becomes the raceway of the tapered roller that forms the rolling element expands from the second side in the axial direction toward the first side;
An inner ring that is concentrically arranged with the outer ring and is configured to be rotatable relative to the outer ring around the axis by a plurality of tapered rollers interposed between the outer ring and the inner ring that serves as a path for the tapered roller The surface is formed on the outer peripheral surface in a shape that expands from the second side in the axial direction toward the first side, and is formed to protrude radially outward in a shape adjacent to the first side of the inner conical raceway surface, An inner ring having a large collar that regulates the axial position of the large-diameter end surface of the tapered roller on the inner conical raceway surface;
A pocket portion that is disposed in the rolling element holding space between the outer ring and the inner ring and that accommodates and holds the plurality of tapered rollers in a rollable manner is formed at predetermined intervals in the circumferential direction. An oil guide that guides the flow of lubricating oil generated in the radial direction inward from the second end of the rolling element holding space to the first end in accordance with the rolling is provided in the pocket portion in the circumferential direction. A cage formed on the inner surface;
It is characterized by providing.

円錐ころの転動に伴うポンプ作用によって潤滑油はアキシャル方向第二側（小径側）から転動体保持空間に流入し、遠心力によってラジアル方向外側へ流動し、アキシャル方向第一側（大径側）から流出する。上記発明によると、円錐ころの保持器に形成されたポケット部の、周方向における内側面に油誘導部が形成されており、この油誘導部によって、上述した潤滑油の流れがラジアル方向内向きに誘導される。これにより潤滑油が供給されやすくなり、油切れによる大鍔面での焼き付きを効果的に防止できるようになる。   Lubricating oil flows into the rolling element holding space from the second axial side (small diameter side) due to the pump action associated with the rolling of the tapered rollers, and flows outward in the radial direction by centrifugal force. The first axial direction (large diameter side) ). According to the above invention, the oil guiding portion is formed on the inner surface in the circumferential direction of the pocket portion formed in the retainer of the tapered roller, and the flow of the lubricating oil described above is directed inward in the radial direction by the oil guiding portion. Be guided to. Thereby, it becomes easy to supply lubricating oil, and it becomes possible to effectively prevent seizing on the large surface due to running out of oil.

なお、油誘導部は、アキシャル方向における第一側の端部が第二側の端部よりもラジアル方向に内側に位置するようにポケット部の内側面に形成された油誘導通路とすることができる。このような構造にすると、アキシャル方向第一側から第二側へ抜ける潤滑油の流れを、ラジアル方向内側に誘導しやすくなる。そのため、潤滑油が大鍔面に供給されやすくなり、焼き付きを効果的に防止できる。   The oil guiding portion may be an oil guiding passage formed on the inner surface of the pocket portion so that the first side end portion in the axial direction is located radially inward from the second side end portion. it can. With such a structure, it becomes easy to guide the flow of the lubricating oil flowing from the first side in the axial direction to the second side inward in the radial direction. Therefore, the lubricating oil can be easily supplied to the large surface, and seizure can be effectively prevented.

この場合、油誘導通路を溝状に形成することができる。このようにすると、潤滑油は溝の内部を流動するため、遠心力を受けてもラジアル方向外側へ流れにくくなる。しかもこの油誘導部は、アキシャル方向における第一側の端部が第二側の端部よりもラジアル方向の内側に位置する構造とされているため、溝の内部の潤滑油を、ラジアル方向内側に誘導しやすくなっている。   In this case, the oil guide passage can be formed in a groove shape. If it does in this way, since lubricating oil will flow in the inside of a slot, even if it receives centrifugal force, it will become difficult to flow to the radial direction outside. In addition, the oil guiding portion has a structure in which the end on the first side in the axial direction is located on the inner side in the radial direction than the end on the second side. It is easy to be guided to.

また、ポケット部の内側面に、各々アキシャル方向における第一側の端部が第二側の端部よりもラジアル方向に内側に位置するガイドリブが複数突出形成され、互いに隣接するガイドリブ間の凹状の空間が前記油誘導通路とされるようにしてもよい。このようにすると、ガイドリブがあるため潤滑油のラジアル方向外側への流動を抑制でき、凹状空間（油誘導通路）に沿って潤滑油をラジアル方向内側へ誘導しやすくなる。   In addition, a plurality of guide ribs are formed on the inner side surface of the pocket portion so that the end portions on the first side in the axial direction are located radially inward from the end portions on the second side, and a concave shape between adjacent guide ribs is formed. A space may be used as the oil guide passage. If it does in this way, since there is a guide rib, the flow of the lubricating oil to the outside in the radial direction can be suppressed, and it becomes easy to guide the lubricating oil to the inside in the radial direction along the concave space (oil guiding passage).

例えば、複数の油誘導通路を、ポケット部の内側面のラジアル方向における外縁側から、大鍔部に対応する内隅位置に向けて集合する形で放射状に形成することができる。このようにすると、放射状にされた油誘導通路に沿って、潤滑油が大鍔部に向かいやすくなる。そのため、大鍔部の焼き付きを効果的に防止できる。   For example, a plurality of oil guide passages can be formed radially from the outer edge side in the radial direction of the inner side surface of the pocket portion toward the inner corner position corresponding to the large collar portion. If it does in this way, lubricating oil will become easy to go to a large collar part along the oil guide passage made radial. Therefore, seizure of the large collar portion can be effectively prevented.

また、複数の油誘導通路を、ポケット部の内側面のラジアル方向における外縁側から内縁側に向けて互いに平行となるように形成してもよい。このようにすると、潤滑油は油誘導通路に沿って内側円錐軌道面に誘導され、その後円錐ころに巻き込まれて、大鍔部へ向かう流れができる。その結果、大鍔面の焼き付き防止効果が向上する。   Further, the plurality of oil guide passages may be formed so as to be parallel to each other from the outer edge side to the inner edge side in the radial direction of the inner surface of the pocket portion. If it does in this way, lubricating oil will be guide | induced to an inner cone track surface along an oil guide path, and it will be wound in a tapered roller after that, and the flow which goes to a large collar part can be made. As a result, the effect of preventing seizure on the large surface is improved.

さらには、油誘導通路の大鍔部に近い側の端部が、ポケット部の内側面周縁に開口するように形成することができる。このようにすると、油誘導通路を流れてきた潤滑油が開口部から出やすくなり、より多くの潤滑油を大鍔面へ供給することが可能となる。   Furthermore, the end of the oil guide passage on the side close to the large collar portion can be formed so as to open to the inner peripheral edge of the pocket portion. If it does in this way, it will become easy for the lubricating oil which has flowed through the oil guide passage to come out from an opening part, and it will become possible to supply more lubricating oil to a large surface.

また、上記保持器は、合成樹脂からなるものとすることができる。樹脂成型用の金型に油誘導通路となる形状を予め作っておき、その金型を使って保持器を成型すると、油誘導通路の形状によっては、金型から成型体が抜けにくくなる場合がある。その場合は、油誘導通路が形成されていない金型を使って保持器を成型し、後工程（例えば切削や型押し）で油誘導通路を形成するとよい。   Further, the cage may be made of a synthetic resin. If the shape that becomes the oil guide passage is made in advance in the mold for resin molding, and the cage is molded using that mold, the molded body may not be easily removed from the mold depending on the shape of the oil guide passage. is there. In that case, the cage may be formed using a mold in which no oil guide passage is formed, and the oil guide passage may be formed in a subsequent process (for example, cutting or embossing).

本発明の実施形態を、図面を参照しながら説明する。
図１は、本発明に係る円錐ころ軸受１の断面図である。このように円錐ころ軸受１は、外輪２と、その外輪２と同心に配置された内輪３と、外輪２と内輪３の間に保持器５によって保持された状態で介装された円錐ころ４とを含む。この円錐ころ４の転動により、外輪２と内輪３は軸線周りに相対回転可能にされている。また、外輪２の内周面には、円錐ころ４の軌道となる外側円錐軌道面２ａがアキシャル方向の第二側（小径側）から第一側（大径側）に向けて拡径する形で形成されている。内輪３の外周面には、円錐ころ４の軌道となる内側円錐軌道面３ａがアキシャル方向第二側から第一側へ向けて拡径する形で形成されている。 Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a tapered roller bearing 1 according to the present invention. As described above, the tapered roller bearing 1 includes the outer ring 2, the inner ring 3 disposed concentrically with the outer ring 2, and the tapered roller 4 interposed between the outer ring 2 and the inner ring 3 while being held by the cage 5. Including. By the rolling of the tapered roller 4, the outer ring 2 and the inner ring 3 are rotatable relative to each other around the axis. Further, on the inner peripheral surface of the outer ring 2, an outer conical raceway surface 2a serving as a raceway for the tapered rollers 4 expands from the second side (small diameter side) in the axial direction toward the first side (large diameter side). It is formed with. On the outer peripheral surface of the inner ring 3, an inner conical raceway surface 3a serving as a raceway for the tapered rollers 4 is formed so as to expand in diameter from the second side in the axial direction toward the first side.

また内輪３には、内側円錐軌道面３ａのアキシャル方向第一側および第二側に隣接する形で、大鍔部７および小鍔部８がラジアル方向に突出形成されている。これら大鍔部７および小鍔部８によって、円錐ころ４のアキシャル方向位置が規制されている。   Further, the inner ring 3 is formed with a large collar part 7 and a small collar part 8 protruding in the radial direction so as to be adjacent to the first side and the second side in the axial direction of the inner conical raceway surface 3a. The axial position of the tapered roller 4 is regulated by the large collar part 7 and the small collar part 8.

図２に、保持器５の斜視図を示す。このように、保持器５は円錐筒状に形成され、複数の円錐ころ４をそれぞれ転動可能に収容保持するポケット部５１が、周方向に予め定められた間隔で形成されている。隣接するポケット部５１の間には柱部５３が設けられている。また、ポケット部５１の周方向における内側面５２には、油誘導部６が形成されている。   FIG. 2 shows a perspective view of the cage 5. As described above, the cage 5 is formed in a conical cylinder shape, and pocket portions 51 that respectively accommodate and hold the plurality of tapered rollers 4 so as to roll are formed at predetermined intervals in the circumferential direction. A column portion 53 is provided between the adjacent pocket portions 51. An oil guiding portion 6 is formed on the inner side surface 52 in the circumferential direction of the pocket portion 51.

図１に戻る。保持器５は、外輪２と外輪３の間の転動体保持空間Ｓに配置されている。外輪２と内輪３が相対回転すると円錐ころ４が転動し、潤滑油のポンプ作用が生じて、転動体保持空間Ｓのアキシャル方向第二側の端部から第一側の端部に向けて潤滑油が流れる。このとき、遠心力によって潤滑油はラジアル方向外側へ流動する。   Returning to FIG. The cage 5 is disposed in the rolling element holding space S between the outer ring 2 and the outer ring 3. When the outer ring 2 and the inner ring 3 rotate relative to each other, the tapered roller 4 rolls, and a lubricating oil pumping action is generated, from the second side end in the axial direction of the rolling element holding space S toward the first side end. Lubricant flows. At this time, the lubricating oil flows radially outward due to the centrifugal force.

上述したように保持器５には、ポケット部５１の内側面５２に油誘導部６が形成されており、この油誘導部６によって、ラジアル方向外側へ流動する潤滑油の流れを妨げて、ラジアル方向内側へ誘導している。そのため、潤滑油の流れは図１に示すようになり、大鍔部７と円錐ころ４が接触する大鍔面７ａへ潤滑油が供給されやすくなる。その結果、大鍔面７ａの焼き付きを効果的に抑制できるようになる。   As described above, the retainer 5 has the oil guiding portion 6 formed on the inner surface 52 of the pocket portion 51, and the oil guiding portion 6 prevents the flow of the lubricating oil flowing outward in the radial direction, thereby It is guided inward. Therefore, the flow of the lubricating oil is as shown in FIG. 1, and the lubricating oil is easily supplied to the large collar surface 7a where the large collar portion 7 and the tapered roller 4 are in contact. As a result, the seizure of the large ridge surface 7a can be effectively suppressed.

従来の円錐ころ軸受は、ポケット部の内側面に油誘導部が形成されていなかったので、潤滑油が遠心力によってラジアル方向外側に流れてしまい、大鍔面７ａへ潤滑油を十分に供給できなかった。しかし本発明では、上述のように油誘導部６を形成したため、大鍔面７ａへ潤滑油を十分に供給することができ、焼き付きを効果的に防止できる。   In the conventional tapered roller bearing, since the oil guiding portion is not formed on the inner surface of the pocket portion, the lubricating oil flows radially outward due to the centrifugal force, and the lubricating oil can be sufficiently supplied to the large collar surface 7a. There wasn't. However, in the present invention, since the oil guiding portion 6 is formed as described above, the lubricating oil can be sufficiently supplied to the large collar surface 7a, and seizure can be effectively prevented.

図１の油誘導部６は、より詳しくは、アキシャル方向における第一側の端部が第二側の端部よりもラジアル方向内側に位置する油誘導通路として形成されている。さらに詳しくは、油誘導通路６は、ポケット部５１の内側面５２のラジアル方向における外縁から、大鍔部７に対応する内隅位置に向けて集合する形で放射状に形成されている。そのため、潤滑油を大鍔面１０７ａへ誘導しやすい。   More specifically, the oil guiding portion 6 in FIG. 1 is formed as an oil guiding passage in which the first side end portion in the axial direction is located radially inward from the second side end portion. More specifically, the oil guide passage 6 is formed radially so as to gather from the outer edge in the radial direction of the inner side surface 52 of the pocket portion 51 toward the inner corner position corresponding to the large collar portion 7. Therefore, it is easy to guide the lubricating oil to the large collar surface 107a.

また、図１の実施例では、油誘導通路６は溝状に形成されている。図１のＡ−Ａ矢視図を図３に示す。このように、外輪２と内輪３の間に円錐ころ４が保持器５に保持された状態で介装されており、保持器５のポケット部の内側面５２に溝状の油誘導通路６が形成されている。溝状にすると、潤滑油は溝の内部を流れるため、遠心力の影響を受けにくくなる。そのため、潤滑油をラジアル方向内側へ誘導しやすい。   In the embodiment of FIG. 1, the oil guide passage 6 is formed in a groove shape. FIG. 3 shows a view taken along the line AA in FIG. In this way, the tapered roller 4 is interposed between the outer ring 2 and the inner ring 3 in a state of being held by the cage 5, and the groove-shaped oil guide passage 6 is formed on the inner side surface 52 of the pocket portion of the cage 5. Is formed. When the groove is formed, the lubricating oil flows through the inside of the groove, so that it is less susceptible to centrifugal force. Therefore, it is easy to guide the lubricating oil to the inside in the radial direction.

なお保持器５は、合成樹脂を使って成型することができる。この場合、油誘導通路６に対応する形状を予め金型に形成しておくと、成型体（保持器）を金型から抜きにくくなる。そのため、油誘導通路６が形成されていない金型を使って保持器を成型し、後工程で油誘導通路６を形成するとよい。例えば切削により形成したり、熱を加えながら型押しすることにより形成することができる。   The cage 5 can be molded using a synthetic resin. In this case, if a shape corresponding to the oil guide passage 6 is formed in advance in the mold, it is difficult to remove the molded body (retainer) from the mold. Therefore, it is preferable to mold the cage using a mold in which the oil guide passage 6 is not formed, and to form the oil guide passage 6 in a subsequent process. For example, it can be formed by cutting or by embossing while applying heat.

合成樹脂としては、潤滑油に含まれる添加剤に対して劣化しにくいものが適しており、例えばポリアミド（特に６，６−ナイロン）を好適に使用できる。   As the synthetic resin, a resin that does not easily deteriorate with respect to the additive contained in the lubricating oil is suitable. For example, polyamide (particularly 6,6-nylon) can be suitably used.

図４に別の実施例を示す。この実施例では、保持器５のポケット部の内側面５２にガイドリブ９が複数突出形成されており、互いに隣接するガイドリブ９間の凹状の空間が油誘導通路６ａとされている。ガイドリブ９によって潤滑油のラジアル方向外側への流れが妨げられ、潤滑油は、油誘導通路６ａに沿ってラジアル方向内側へ案内される。   FIG. 4 shows another embodiment. In this embodiment, a plurality of guide ribs 9 are formed on the inner side surface 52 of the pocket portion of the cage 5, and a concave space between the adjacent guide ribs 9 serves as an oil guide passage 6a. The guide rib 9 prevents the lubricating oil from flowing outward in the radial direction, and the lubricating oil is guided radially inward along the oil guide passage 6a.

次に、図５に別の実施例を示す。この実施例では、複数の油誘導通路６が、ポケット部５１の内側面５２のラジアル方向における外縁側から内縁側に向けて互いに平行となるように形成されている。これにより、小径側から大径側へ向かう潤滑油の一部が油誘導通路に沿ってラジアル方向内側へ誘導され、内側円錐軌道面３ａに導かれた後、円錐ころ４の転動によって大鍔面７ａへ向かう流れが生じる。これにより、大鍔面７ａの焼き付きを効果的に防止できる。   Next, another embodiment is shown in FIG. In this embodiment, the plurality of oil guide passages 6 are formed so as to be parallel to each other from the outer edge side to the inner edge side in the radial direction of the inner side surface 52 of the pocket portion 51. As a result, a part of the lubricating oil from the small diameter side to the large diameter side is guided radially inward along the oil guide passage, guided to the inner conical raceway surface 3a, and then rolled by the tapered roller 4. A flow toward the surface 7a occurs. Thereby, the seizure of the large ridge surface 7a can be effectively prevented.

また、本発明は図６のようにすることもできる。この実施例では、油誘導通路６の大鍔部７に近い側の端部６ａが、ポケット部５１の内側面５２の周縁に開口するように形成されている。さらに油誘導通路６は、大鍔部７へ向けて集合する形で放射状に形成されている。これにより、潤滑を大鍔部７に集合させることができ、また、端部６ａが開口しているため潤滑油が流出しやすく、より多くの潤滑油を大鍔面７ａへ供給することが可能となる。   Further, the present invention can be configured as shown in FIG. In this embodiment, the end 6 a of the oil guide passage 6 on the side close to the large collar portion 7 is formed so as to open to the periphery of the inner side surface 52 of the pocket portion 51. Further, the oil guide passages 6 are radially formed so as to gather toward the large collar portion 7. Thereby, lubrication can be gathered in the large collar part 7, and since the edge part 6a is opening, lubricating oil tends to flow out and it can supply more lubricating oil to the large collar surface 7a. It becomes.

一方、油誘導通路６の大鍔部から遠い側の端部６ｂは、ポケット部５１の内側面５２の周縁で閉じるように形成されている。そのため、円錐ころ４の転動による遠心力が作用しても潤滑油が端部６ｂからラジアル方向外側へ出にくくなり、より多くの潤滑油を大鍔面７ａへ誘導することができる。   On the other hand, the end 6 b far from the large collar portion of the oil guide passage 6 is formed so as to be closed at the periphery of the inner side surface 52 of the pocket portion 51. Therefore, even if the centrifugal force due to the rolling of the tapered roller 4 acts, the lubricating oil is difficult to come out radially outward from the end portion 6b, and more lubricating oil can be guided to the large collar surface 7a.

なお、図７に示すように、保持器５と外輪２の間隙Ａから潤滑油が流入する場合は、端部６ｂが内側面５２の周縁で開口するようにしてもよい。この場合、潤滑油の一部が端部６ｂから油誘導通路６へ入り、反対側の端部６ａから流出する流れができる。   As shown in FIG. 7, when lubricating oil flows from the gap A between the cage 5 and the outer ring 2, the end 6 b may open at the periphery of the inner side surface 52. In this case, a part of the lubricating oil enters the oil guide passage 6 from the end 6b and flows out from the opposite end 6a.

さらに、図８に示す形態にしてもよい。この実施例では、油誘導通路６が、ポケット部５１の内側面５２のラジアル方向における外縁側から内縁側に向けて互いに平行となるように形成されており、大鍔部７に近い側の端部６ａと遠い側の端部６ｂが、内側面５２の周縁に開口するように形成されている。これにより、保持器５と外輪２の間隙Ａから流入する潤滑油の一部が端部６ｂから油誘導通路６へ入り、ラジアル方向内側へ誘導することが可能となり、また、反対側の端部６ａも開口しているため、より多くの潤滑油を大鍔面７ａへ誘導することができる。   Furthermore, you may make it the form shown in FIG. In this embodiment, the oil guide passage 6 is formed so as to be parallel to each other from the outer edge side to the inner edge side in the radial direction of the inner side surface 52 of the pocket portion 51, and the end closer to the large collar portion 7. An end 6 b far from the portion 6 a is formed so as to open at the periphery of the inner side surface 52. As a result, a part of the lubricating oil flowing in from the gap A between the cage 5 and the outer ring 2 can enter the oil guiding passage 6 from the end 6b and be guided radially inward, and the opposite end Since 6a is also open, more lubricating oil can be guided to the large collar surface 7a.

以上説明したように本発明は、円錐ころ４の転動に伴って小径側から転動体保持空間Ｓに入り、遠心力によってラジアル方向外向きに流動し、大径側から流出する潤滑油の流れを、円錐ころ４のポケット部５１の内側面５２に形成した油誘導部（油誘導通路）６によってラジアル方向内側へ誘導することができる。これにより、大鍔部７と円錐ころ４が接触する大鍔面７ａに十分な量の潤滑油を供給でき、焼き付きを効果的に防止できる。   As described above, according to the present invention, the flow of the lubricating oil that enters the rolling element holding space S from the small diameter side as the tapered roller 4 rolls, flows radially outward by centrifugal force, and flows out from the large diameter side. Can be guided radially inward by an oil guiding portion (oil guiding passage) 6 formed on the inner surface 52 of the pocket portion 51 of the tapered roller 4. Thereby, sufficient quantity of lubricating oil can be supplied to the large collar surface 7a where the large collar part 7 and the tapered roller 4 contact, and seizing can be prevented effectively.

本発明に係る円錐ころ軸受の断面図。Sectional drawing of the tapered roller bearing which concerns on this invention. 保持器の斜視図。The perspective view of a holder | retainer. 円錐ころ軸受のＡ−Ａ矢視図。AA arrow directional view of a tapered roller bearing. ガイドリブ部を突出形成した場合の円錐ころ軸受。Tapered roller bearing with guide ribs protruding. 円錐ころ軸受の第一変形例。A first variation of the tapered roller bearing. 円錐ころ軸受の第二変形例。The 2nd modification of a tapered roller bearing. 円錐ころ軸受の第三変形例。3rd modification of a tapered roller bearing. 円錐ころ軸受の第四変形例。4th modification of a tapered roller bearing.

符号の説明Explanation of symbols

１ 円錐ころ軸受
２ 外輪
２ａ 外側円錐軌道面
３ 内輪
３ａ 内側円錐軌道面
４ 円錐ころ
５ 保持器
６ 油誘導部（油誘導通路）
７ 大鍔部
７ａ 大鍔面
８ 小鍔部
９ ガイドリブ
５１ ポケット部
５２（ポケット部の）内側面 DESCRIPTION OF SYMBOLS 1 Tapered roller bearing 2 Outer ring 2a Outer conical raceway surface 3 Inner ring 3a Inner conical raceway surface 4 Tapered roller 5 Cage 6 Oil guide part (oil guide path)
7 Large collar part 7a Large collar surface 8 Small collar part 9 Guide rib 51 Pocket part 52 (on the pocket part) inner surface

Claims (7)

転動体をなす円錐ころの軌道となる外側円錐軌道面がアキシャル方向の第二側から第一側に向けて拡径する形で内周面に形成された外輪と、
その外輪と同心に配置され、前記外輪との間に介装された複数個の前記円錐ころによって該外輪に対して軸線周りに相対回転可能にされた内輪であって、前記円錐ころの軌道となる内側円錐軌道面がアキシャル方向の第二側から第一側へ向けて拡径する形で外周面に形成されるとともに、該内側円錐軌道面の前記第一側に隣接する形でラジアル方向外向きに突出形成され、該内側円錐軌道面上の前記円錐ころの大径端面のアキシャル方向位置を規制する大鍔部を有した内輪と、
前記外輪と前記内輪との間の転動体保持空間に配置され、複数個の前記円錐ころをそれぞれ転動可能に収容保持するポケット部が周方向に予め定められた間隔にて形成されるとともに、前記円錐ころの転動に伴って前記転動体保持空間の前記第二側の端部から前記第一側の端部に向けて生ずる潤滑油の流れをラジアル方向内向きに誘導する油誘導部が、前記周方向における前記ポケット部の内側面に形成された保持器と、
を備えることを特徴とする円錐ころ軸受。 An outer ring formed on the inner peripheral surface in such a manner that the outer conical raceway surface that becomes the raceway of the tapered roller that forms the rolling element expands from the second side in the axial direction toward the first side;
An inner ring that is arranged concentrically with the outer ring and is rotatable relative to the outer ring around an axis by the plurality of tapered rollers interposed between the outer ring and a raceway of the tapered roller The inner conical raceway surface is formed on the outer peripheral surface so as to increase in diameter from the second side in the axial direction toward the first side, and is formed radially adjacent to the first side of the inner conical raceway surface. An inner ring having a large collar portion that protrudes in the direction and restricts the axial position of the large-diameter end surface of the tapered roller on the inner conical raceway surface;
A pocket portion that is disposed in a rolling element holding space between the outer ring and the inner ring and that accommodates and holds the plurality of tapered rollers in a rollable manner is formed at predetermined intervals in the circumferential direction, An oil guiding portion that guides a flow of lubricating oil generated inward in the radial direction from the second side end portion of the rolling element holding space to the first side end portion with the rolling of the tapered roller. A cage formed on the inner surface of the pocket portion in the circumferential direction;
A tapered roller bearing comprising: 前記油誘導部は、アキシャル方向における前記第一側の端部が前記第二側の端部よりもラジアル方向に内側に位置するように前記ポケット部の前記内側面に形成された油誘導通路である請求項１記載の円錐ころ軸受。   The oil guiding portion is an oil guiding passage formed on the inner side surface of the pocket portion so that the end portion on the first side in the axial direction is located radially inward from the end portion on the second side. The tapered roller bearing according to claim 1. 前記油誘導通路が溝状に形成されている請求項２記載の円錐ころ軸受。   The tapered roller bearing according to claim 2, wherein the oil guide passage is formed in a groove shape. 前記ポケット部の前記内側面に、各々アキシャル方向における前記第一側の端部が前記第二側の端部よりもラジアル方向に内側に位置するガイドリブが複数突出形成され、互いに隣接するガイドリブ間の凹状の空間が前記油誘導通路とされている請求項２記載の円錐ころ軸受。   A plurality of guide ribs in which the first side end portion in the axial direction is positioned radially inward from the second side end portion on the inner side surface of the pocket portion are formed between the adjacent guide ribs. The tapered roller bearing according to claim 2, wherein a concave space is used as the oil guide passage. 複数の前記油誘導通路が、前記ポケット部の内側面のラジアル方向における外縁側から、前記大鍔部に対応する内隅位置に向けて集合する形で放射状に形成されている請求項４記載の円錐ころ軸受。   The plurality of oil guide passages are radially formed in such a manner that they gather from an outer edge side in the radial direction of an inner side surface of the pocket portion toward an inner corner position corresponding to the large collar portion. Tapered roller bearing. 複数の前記油誘導通路が、前記ポケット部の内側面のラジアル方向における外縁側から内縁側に向けて互いに平行となるように形成されている請求項４記載の円錐ころ軸受。   The tapered roller bearing according to claim 4, wherein the plurality of oil guide passages are formed so as to be parallel to each other from an outer edge side to an inner edge side in a radial direction of an inner side surface of the pocket portion. 前記油誘導通路の前記大鍔部に近い側の端部が、前記ポケット部の内側面周縁に開口するように形成されている請求項２記載の円錐ころ軸受。   The tapered roller bearing according to claim 2, wherein an end portion of the oil guide passage on a side close to the large collar portion is formed so as to open to a peripheral edge of an inner surface of the pocket portion.
JP2006224143A 2006-08-21 2006-08-21 Tapered roller bearing Pending JP2008045711A (en)

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JP2009191940A (en) * 2008-02-14 2009-08-27 Nsk Ltd Synthetic resin cage for tapered roller bearing, and tapered roller bearing
JP2010031901A (en) * 2008-07-25 2010-02-12 Jtekt Corp Tapered roller bearing
JP2011214689A (en) * 2010-04-01 2011-10-27 Jtekt Corp Tapered roller bearing device
JP2012241873A (en) * 2011-05-24 2012-12-10 Jtekt Corp Tapered roller bearing
WO2012175649A1 (en) 2011-06-22 2012-12-27 Aktiebolaget Skf Rolling-element bearing cage
WO2013042521A1 (en) * 2011-09-22 2013-03-28 Ntn株式会社 Roller bearing
DE112009001651B4 (en) * 2008-07-08 2014-03-06 Nsk Ltd. Resin cage for tapered roller bearings and tapered roller bearings
WO2018181756A1 (en) * 2017-03-30 2018-10-04 Ntn株式会社 Tapered roller bearing

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009191940A (en) * 2008-02-14 2009-08-27 Nsk Ltd Synthetic resin cage for tapered roller bearing, and tapered roller bearing
DE112009001651B4 (en) * 2008-07-08 2014-03-06 Nsk Ltd. Resin cage for tapered roller bearings and tapered roller bearings
US9039288B2 (en) 2008-07-08 2015-05-26 Nsk Ltd. Tapered roller bearing resin cage and tapered roller bearing
JP2010031901A (en) * 2008-07-25 2010-02-12 Jtekt Corp Tapered roller bearing
JP2011214689A (en) * 2010-04-01 2011-10-27 Jtekt Corp Tapered roller bearing device
JP2012241873A (en) * 2011-05-24 2012-12-10 Jtekt Corp Tapered roller bearing
WO2012175649A1 (en) 2011-06-22 2012-12-27 Aktiebolaget Skf Rolling-element bearing cage
DE102011077935A1 (en) * 2011-06-22 2012-12-27 Aktiebolaget Skf Rolling bearing cage
WO2013042521A1 (en) * 2011-09-22 2013-03-28 Ntn株式会社 Roller bearing
US8939865B2 (en) 2011-09-22 2015-01-27 Ntn Corporation Roller bearing
JP2013068281A (en) * 2011-09-22 2013-04-18 Ntn Corp Roller bearing
WO2018181756A1 (en) * 2017-03-30 2018-10-04 Ntn株式会社 Tapered roller bearing
JP2018168981A (en) * 2017-03-30 2018-11-01 Ntn株式会社 Conical roller bearing
US10883536B2 (en) 2017-03-30 2021-01-05 Ntn Corporation Tapered roller bearing

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