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JP5292842B2 - Tapered roller bearing cage and tapered roller bearing - Google Patents

Tapered roller bearing cage and tapered roller bearing Download PDF

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Publication number
JP5292842B2
JP5292842B2 JP2008028967A JP2008028967A JP5292842B2 JP 5292842 B2 JP5292842 B2 JP 5292842B2 JP 2008028967 A JP2008028967 A JP 2008028967A JP 2008028967 A JP2008028967 A JP 2008028967A JP 5292842 B2 JP5292842 B2 JP 5292842B2
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side annular
tapered roller
roller bearing
diameter side
annular part
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JP2009185978A (en
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匠 竹内
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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
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6674—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to the amount supplied, e.g. gaps to restrict flow of the liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—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
    • F16C33/6685—Details of collecting or draining, e.g. returning the liquid to a sump

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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 retainer for a tapered roller bearing and the tapered roller bearing which can reduce the agitation resistance of a lubricant in the bearing and can reduce the rotation torque of the bearing. <P>SOLUTION: The retainer for the tapered roller bearing 14 has a large diameter-side annular part 15, a small diameter-side annular part 16 arranged coaxially with the large diameter-side annular part 15, pillar parts 17 arranged plurally in a substantially equidistant manner in the circumference to connect the large diameter-side annular part 15 and the small diameter-side annular part 16, and pocket parts 18 which are formed between the pillar parts 17 adjacent to each other in the circumference and which support tapered rollers 13 so that they can roll. Through holes 19 for relieving the lubricant are formed in the axial end face of the large diameter-side annular part 15. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

本発明は、例えば、鉄道車両、鉄鋼機械、工作機械、建設機械等の一般産業機械や、自動車のトランスミッション等の回転支持部に使用される円すいころ軸受用保持器及び円すいころ軸受に関する。   The present invention relates to a tapered roller bearing retainer and a tapered roller bearing used for a general industrial machine such as a railway vehicle, a steel machine, a machine tool, and a construction machine, and a rotation support part of an automobile transmission or the like.

円すいころ軸受は、コンパクトで、大きなラジアル荷重及びアキシャル荷重を支持することができ、しかも、高速回転で使用することができるため、広く使用されている。   Tapered roller bearings are widely used because they are compact, can support large radial loads and axial loads, and can be used at high speeds.

従来の円すいころ軸受としては、例えば、図８に示す円すいころ軸受５０が知られている。この円すいころ軸受５０は、内周面に外輪軌道面５１ａを有する外輪５１と、外周面に内輪軌道面５２ａを有する内輪５２と、外輪軌道面５１ａと内輪軌道面５２ａとの間に転動可能に配設される複数の円すいころ５３と、円すいころ５３を円周方向に等間隔に保持する保持器５４と、を備える。   As a conventional tapered roller bearing, for example, a tapered roller bearing 50 shown in FIG. 8 is known. The tapered roller bearing 50 can roll between an outer ring 51 having an outer ring raceway surface 51a on an inner peripheral surface, an inner ring 52 having an inner ring raceway surface 52a on an outer peripheral surface, and the outer ring raceway surface 51a and the inner ring raceway surface 52a. And a plurality of tapered rollers 53 disposed in the holder, and a retainer 54 that holds the tapered rollers 53 at equal intervals in the circumferential direction.

保持器５４は、図９に示すように、大径側円環部５５と、大径側円環部５５と同軸配置される小径側円環部５６と、大径側円環部５５と小径側円環部５６とを連結すべく、円周方向に略等間隔で複数配置される柱部５７と、円周方向に互いに隣り合う柱部５７の間に形成され、円すいころ５３を転動可能に保持するポケット部５８と、を有する。   As shown in FIG. 9, the cage 54 includes a large-diameter-side annular portion 55, a small-diameter-side annular portion 56 that is coaxially arranged with the large-diameter-side annular portion 55, and a large-diameter-side annular portion 55 and a small-diameter. In order to connect the side annular portion 56, a plurality of column portions 57 arranged at substantially equal intervals in the circumferential direction and the column portions 57 adjacent to each other in the circumferential direction are formed to roll the tapered rollers 53. A pocket portion 58 for holding the same.

ところで、円すいころ軸受５０では、回転トルクの発生要因として、円すいころ５３と内輪５２との間の摩擦抵抗の他に、図８の矢印に示すように、内輪５２の小径側端部から流入して大径側端部から排出される潤滑油の軸受内での攪拌抵抗があり、この回転トルクが大きいと、エネルギー節約の観点から好ましくない。   Incidentally, in the tapered roller bearing 50, in addition to the frictional resistance between the tapered roller 53 and the inner ring 52, as shown in the arrow of FIG. In addition, there is an agitation resistance in the bearing of the lubricating oil discharged from the end portion on the large-diameter side.

このため、軸受の回転トルクの低減を目的として、保持器５４の小径側端部の内輪５２側への折り曲げ部と内輪５２との間隙を調整して、軸受内への潤滑油の流入量を減らし、これにより、軸受内での潤滑油の攪拌抵抗を低減する技術が提案されている（例えば、特許文献１参照）。   For this reason, for the purpose of reducing the rotational torque of the bearing, the gap between the inner ring 52 and the bent portion of the small-diameter end of the cage 54 toward the inner ring 52 is adjusted to reduce the amount of lubricating oil flowing into the bearing. A technique for reducing the agitation resistance of lubricating oil in the bearing has been proposed (see, for example, Patent Document 1).

また、同様に、軸受の回転トルクの低減を目的として、保持器５４の小径側端部の内輪５２側への折り曲げ部と内輪５２との間隙、及び保持器５４の大径側端部の内輪５２側への折り曲げ部と内輪５２との間隙を調整して、軸受内への潤滑油の流入量を最小限に抑える技術が提案されている（例えば、特許文献２参照）。   Similarly, for the purpose of reducing the rotational torque of the bearing, the gap between the bent portion of the cage 54 on the small diameter side end toward the inner ring 52 and the inner ring 52 and the inner ring on the large diameter side end of the cage 54 are also shown. A technique has been proposed in which the gap between the bent portion toward the side 52 and the inner ring 52 is adjusted to minimize the amount of lubricating oil flowing into the bearing (see, for example, Patent Document 2).

特開平１１−２０１１４９号公報JP-A-11-2011149 特開平１０−８９３５３号公報Japanese Patent Laid-Open No. 10-89353

しかしながら、上記特許文献１及び特許文献２に記載の円すいころ軸受では、保持器５４の内輪５２側への折り曲げ部と内輪５２との間隙の寸法調整や内輪５２側の加工が必要になり、また、保持器５４の基本断面形状を変更しなければならないため、製造コストが増加する可能性があった。   However, in the tapered roller bearings described in Patent Document 1 and Patent Document 2, it is necessary to adjust the size of the gap between the bent portion of the cage 54 toward the inner ring 52 and the inner ring 52 and to process the inner ring 52. Since the basic cross-sectional shape of the cage 54 has to be changed, the manufacturing cost may increase.

本発明は、このような不都合を解消するためになされたものであり、その目的は、軸受内での潤滑油の攪拌抵抗を低減することができ、軸受の回転トルクを低減することができる円すいころ軸受用保持器及び円すいころ軸受を提供することにある。   The present invention has been made to eliminate such inconveniences, and its purpose is to reduce the stirring resistance of the lubricating oil in the bearing, and to reduce the rotational torque of the bearing. The object is to provide a roller bearing cage and a tapered roller bearing.

本発明の上記目的は、下記の構成により達成される。
（１）大径側円環部と、大径側円環部と同軸配置される小径側円環部と、大径側円環部と小径側円環部とを連結すべく、円周方向に略等間隔で複数配置される柱部と、円周方向に互いに隣り合う柱部の間に形成され、円すいころを転動可能に保持するポケット部と、を有する円すいころ軸受用保持器であって、合成樹脂製であり、大径側円環部、小径側円環部、及び柱部のうち大径側円環部の軸方向端面にのみ潤滑油逃げ用の貫通穴が設けられ、貫通穴は大径側円環部を略軸方向に貫通するように形成され、貫通穴の径方向寸法は大径側円環部の径方向の板厚の５０％以下であり、貫通穴はポケット部それぞれに対して円周方向に互いに離間して２個ずつ配置され、これにより、軸受内部に流入する潤滑油は貫通穴を通過して排出されて、軸受内部での潤滑油の攪拌抵抗が低減することを特徴とする円すいころ軸受用保持器。
（２）貫通穴それぞれが柱部の近傍に設けられていることを特徴とする（１）に記載の円すいころ軸受用保持器。
（３）内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、外輪軌道面と内輪軌道面との間に転動可能に配設される複数の円すいころと、円すいころを円周方向に等間隔に保持する保持器と、を備える円すいころ軸受であって、保持器が、（１）又は（２）に記載の円すいころ軸受用保持器であることを特徴とする円すいころ軸受。 The above object of the present invention can be achieved by the following constitution.
(1) A circumferential direction in order to connect the large diameter side annular part, the small diameter side annular part coaxially arranged with the large diameter side annular part, and the large diameter side annular part and the small diameter side annular part. A tapered roller bearing retainer having a plurality of pillar portions arranged at substantially equal intervals on each other and a pocket portion formed between the pillar portions adjacent to each other in the circumferential direction to hold the tapered rollers in a rollable manner. It is made of synthetic resin, and a through hole for lubricating oil escape is provided only on the end surface in the axial direction of the large-diameter side annular part of the large-diameter side annular part, the small-diameter side annular part, and the column part, The through-hole is formed so as to penetrate the large-diameter side annular part in the substantially axial direction, and the radial dimension of the through-hole is 50% or less of the radial thickness of the large-diameter side annular part. disposed two by two spaced from each other in the circumferential direction relative to the pocket portions respectively, thereby the lubricating oil flowing in the bearing is discharged through the through hole, the shaft Cage for the tapered roller bearing, characterized in that the stirring resistance of the lubricating oil inside is reduced.
(2) The tapered roller bearing retainer according to (1), wherein each of the through holes is provided in the vicinity of the column portion.
(3) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising: a retainer that retains the tapered roller at equal intervals in the circumferential direction, wherein the retainer is the retainer for the tapered roller bearing according to (1) or (2). Tapered roller bearing.

本発明の円すいころ軸受用保持器及び円すいころ軸受によれば、保持部の大径側円環部、小径側円環部、及び柱部のうち大径側円環部の軸方向端面にのみ潤滑油逃げ用の貫通穴が設けられるため、軸受内に流入した潤滑油を速やかに排出することができる。これにより、軸受内での潤滑油の攪拌抵抗を低減することができ、軸受の回転トルクを低減することができる。
また、本発明の円すいころ軸受用保持器及び円すいころ軸受によれば、貫通穴の径方向寸法は大径側円環部の径方向の板厚の５０％以下であるため、軸受回転時に保持器に作用する荷重に耐える強度を確保しつつ、回転トルクを低減することができる。 According to the tapered roller bearing retainer and the tapered roller bearing of the present invention, only the axial end face of the large-diameter side annular portion among the large-diameter- side annular portion, the small-diameter-side annular portion, and the column portion of the holding portion. Since the through hole for lubricating oil escape is provided, the lubricating oil flowing into the bearing can be quickly discharged. Thereby, the stirring resistance of the lubricating oil in the bearing can be reduced, and the rotational torque of the bearing can be reduced.
Further, according to the tapered roller bearing retainer and the tapered roller bearing of the present invention, since the radial dimension of the through hole is 50% or less of the radial thickness of the large-diameter side annular portion, it is retained when the bearing rotates. The rotational torque can be reduced while ensuring the strength to withstand the load acting on the vessel.

以下、本発明に係る円すいころ軸受用保持器及び円すいころ軸受の一実施形態について、図面を参照して詳細に説明する。
図１は本発明に係る円すいころ軸受用保持器及び円すいころ軸受の一実施形態を説明するための要部断面図、図２は図１に示す円すいころ軸受用保持器を説明するための斜視図、図３は図２のＡ部拡大図、図４は円すいころ軸受用保持器の第１変形例を説明するための要部拡大斜視図、図５は円すいころ軸受用保持器の第２変形例を説明するための要部拡大断面図、図６は円すいころ軸受用保持器の第３変形例を説明するための要部拡大断面図、図７は円すいころ軸受用保持器の第４変形例を説明するための要部拡大断面図である。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a tapered roller bearing retainer and a tapered roller bearing according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of a main part for explaining an embodiment of a tapered roller bearing retainer and a tapered roller bearing according to the present invention, and FIG. 2 is a perspective view for explaining the tapered roller bearing retainer shown in FIG. FIG. 3, FIG. 3 is an enlarged view of a part A in FIG. 2, FIG. 4 is an enlarged perspective view of a main part for explaining a first modified example of the tapered roller bearing retainer, and FIG. 5 is a second view of the tapered roller bearing retainer. The principal part expanded sectional view for demonstrating a modification, FIG. 6 is a principal part expanded sectional view for demonstrating the 3rd modification of a tapered roller bearing retainer, FIG. 7 is 4th of a tapered roller bearing retainer. It is a principal part expanded sectional view for demonstrating a modification.

本実施形態の円すいころ軸受１０は、図１に示すように、内周面に外輪軌道面１１ａを有する外輪１１と、外周面に内輪軌道面１２ａを有する内輪１２と、外輪軌道面１１ａと内輪軌道面１２ａとの間に転動可能に配設される複数の円すいころ１３と、円すいころ１３を円周方向に等間隔に保持する円すいころ軸受用保持器１４と、を備える。   As shown in FIG. 1, the tapered roller bearing 10 of this embodiment includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring raceway surface 11a and an inner ring. A plurality of tapered rollers 13 disposed so as to be able to roll between the raceway surface 12a, and a tapered roller bearing retainer 14 that holds the tapered rollers 13 at equal intervals in the circumferential direction.

円すいころ軸受用保持器１４は、合成樹脂の射出成形で形成されており、図２に示すように、大径側円環部１５と、大径側円環部１５と同軸配置される小径側円環部１６と、大径側円環部１５と小径側円環部１６とを連結すべく、円周方向に略等間隔で複数配置される柱部１７と、円周方向に互いに隣り合う各柱部１７の間に形成され、円すいころ１３を転動可能に保持するポケット部１８と、を備える。   The tapered roller bearing retainer 14 is formed by injection molding of synthetic resin. As shown in FIG. 2, the large diameter side annular portion 15 and the small diameter side arranged coaxially with the large diameter side annular portion 15. In order to connect the annular portion 16, the large-diameter-side annular portion 15, and the small-diameter-side annular portion 16, a plurality of column portions 17 that are arranged at substantially equal intervals in the circumferential direction are adjacent to each other in the circumferential direction. A pocket portion 18 is formed between the column portions 17 and holds the tapered rollers 13 in a rollable manner.

そして、本実施形態では、図３に示すように、円すいころ軸受用保持器１４の大径側円環部１５の軸方向端面に潤滑油逃げ用の貫通穴１９が形成される。この貫通穴１９は、大径側円環部１５を略軸方向に貫通するように形成される。これにより、図１の矢印に示すように、内輪１２の小径側端部と保持器１４の小径側円環部１６との間からから流入した潤滑油が、外輪１１及び内輪１２の大径側端部と保持器１４の大径側円環部１５との間から排出されると共に、大径側円環部１５の貫通穴１９からも排出される。   In this embodiment, as shown in FIG. 3, a through hole 19 for lubricating oil escape is formed on the end surface in the axial direction of the large-diameter side annular portion 15 of the tapered roller bearing retainer 14. The through hole 19 is formed so as to penetrate the large-diameter side annular portion 15 substantially in the axial direction. As a result, as shown by the arrows in FIG. 1, the lubricating oil flowing from between the small-diameter side end portion of the inner ring 12 and the small-diameter side annular portion 16 of the retainer 14 becomes larger on the large-diameter side of the outer ring 11 and the inner ring 12. The gas is discharged from between the end portion and the large-diameter side annular portion 15 of the retainer 14 and is also discharged from the through hole 19 of the large-diameter side annular portion 15.

また、貫通穴１９は、本実施形態では円形であり、各ポケット部１８に対して円周方向に互いに離間して２個ずつ配置される。また、貫通穴１６の直径Ｄは、軸受回転時に保持器１４に作用する荷重に耐える強度を確保できる範囲で、例えば、大径側円環部１５の径方向の板厚Ｔの５０％以下が好ましい。   In addition, the through holes 19 are circular in the present embodiment, and two through holes 19 are spaced apart from each other in the circumferential direction with respect to each pocket portion 18. Further, the diameter D of the through hole 16 is within a range in which the strength that can withstand the load acting on the cage 14 during rotation of the bearing can be secured, for example, 50% or less of the radial thickness T of the large-diameter side annular portion 15. preferable.

以上説明したように、本実施形態の円すいころ軸受用保持器１４及び円すいころ軸受１０によれば、保持部１４の大径側円環部１５の軸方向端面に潤滑油逃げ用の貫通穴１９が設けられるため、軸受１０内に流入した潤滑油を速やかに排出することができる。これにより、軸受１０内での潤滑油の攪拌抵抗を低減することができ、軸受１０の回転トルクを低減することができる。   As described above, according to the tapered roller bearing retainer 14 and the tapered roller bearing 10 of the present embodiment, the through hole 19 for lubricating oil escape is formed on the axial end surface of the large-diameter annular portion 15 of the retaining portion 14. Therefore, the lubricating oil that has flowed into the bearing 10 can be quickly discharged. Thereby, the stirring resistance of the lubricating oil in the bearing 10 can be reduced, and the rotational torque of the bearing 10 can be reduced.

なお、本実施形態の円すいころ軸受用保持器１４の第１変形例として、上記実施形態では、貫通穴１９を柱部１７から円周方向に離れた位置に形成したが、図４に示すように、貫通穴１９を柱部１７の近傍に形成するようにしてもよい。   As a first modification of the tapered roller bearing retainer 14 of the present embodiment, the through hole 19 is formed at a position away from the column portion 17 in the circumferential direction in the above embodiment, but as shown in FIG. In addition, the through hole 19 may be formed in the vicinity of the column portion 17.

また、本実施形態の円すいころ軸受用保持器１４の第２変形例として、図５に示すように、貫通穴１９を四角形状としてもよい。この場合、貫通穴１９の円周方向長さＬ１は、軸受回転時に保持器１４に作用する荷重に耐える強度を確保できる範囲で、例えば、ポケット部１８の円周方向長さＬ２の５０％以下が好ましい。   Further, as a second modification of the tapered roller bearing retainer 14 of the present embodiment, as shown in FIG. In this case, the circumferential length L1 of the through hole 19 is within a range in which the strength that can withstand the load acting on the cage 14 during rotation of the bearing can be secured, for example, 50% or less of the circumferential length L2 of the pocket portion 18. Is preferred.

また、本実施形態の円すいころ軸受用保持器１４の第３変形例として、図６に示すように、貫通穴１９を三角形状としてもよい。   As a third modification of the tapered roller bearing retainer 14 of the present embodiment, the through hole 19 may be triangular as shown in FIG.

また、本実施形態の円すいころ軸受用保持器１４の第４変形例として、上記実施形態では、各ポケット部１８に対して貫通穴１９を設ける場合を例示したが、図７に示すように、貫通穴１９が設けられるポケット部１８と貫通穴１９が設けられないポケット部１８が円周方向に交互に配置されるようにしてもよい。なお、本変形例では、貫通穴１９は、ポケット部１８の円周方向中央部に１個配置されている。   Further, as a fourth modified example of the tapered roller bearing retainer 14 of the present embodiment, in the above embodiment, the case where the through holes 19 are provided in the pocket portions 18 is illustrated, but as shown in FIG. The pocket portions 18 provided with the through holes 19 and the pocket portions 18 not provided with the through holes 19 may be alternately arranged in the circumferential direction. In the present modification, one through hole 19 is disposed at the center in the circumferential direction of the pocket portion 18.

なお、本発明は上記実施形態に例示したものに限定されるものではなく、本発明の要旨を逸脱しない範囲において適宜変更可能である。
例えば、上記実施形態では、１個のポケット部１８に対して貫通穴１９を１個又は２個設ける場合を例示したが、これに限定されず、貫通穴１９を３個以上設けるようにしてもよい。また、貫通穴１９の形状も上記に限定されず任意である。 In addition, this invention is not limited to what was illustrated to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, in the above embodiment, the case where one or two through holes 19 are provided for one pocket portion 18 is illustrated, but the present invention is not limited to this, and three or more through holes 19 may be provided. Good. Further, the shape of the through hole 19 is not limited to the above and is arbitrary.

本発明に係る円すいころ軸受用保持器及び円すいころ軸受の一実施形態を説明するための要部断面図である。It is principal part sectional drawing for demonstrating one Embodiment of the retainer for tapered roller bearings and tapered roller bearing which concern on this invention. 図１に示す円すいころ軸受用保持器を説明するための斜視図である。It is a perspective view for demonstrating the tapered roller bearing retainer shown in FIG. 図２のＡ部拡大図である。It is the A section enlarged view of FIG. 円すいころ軸受用保持器の第１変形例を説明するための要部拡大斜視図である。It is a principal part expansion perspective view for demonstrating the 1st modification of the retainer for tapered roller bearings. 円すいころ軸受用保持器の第２変形例を説明するための要部拡大断面図である。It is a principal part expanded sectional view for demonstrating the 2nd modification of the retainer for tapered roller bearings. 円すいころ軸受用保持器の第３変形例を説明するための要部拡大断面図である。It is a principal part expanded sectional view for demonstrating the 3rd modification of the retainer for tapered roller bearings. 円すいころ軸受用保持器の第４変形例を説明するための要部拡大断面図である。It is a principal part expanded sectional view for demonstrating the 4th modification of the retainer for tapered roller bearings. 従来の円すいころ軸受を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the conventional tapered roller bearing. 従来の円すいころ軸受用保持器を説明するための斜視図である。It is a perspective view for demonstrating the conventional taper roller bearing retainer.

符号の説明Explanation of symbols

１０ 円すいころ軸受
１１ 外輪
１１ａ 外輪軌道面
１２ 内輪
１２ａ 内輪軌道面
１３ 円すいころ
１４ 円すいころ軸受用保持器
１５ 大径側円環部
１６ 小径側円環部
１７ 柱部
１８ ポケット部
１９ 貫通穴 DESCRIPTION OF SYMBOLS 10 Tapered roller bearing 11 Outer ring 11a Outer ring raceway surface 12 Inner ring 12a Inner ring raceway surface 13 Tapered roller 14 Tapered roller bearing cage 15 Large-diameter side annular part 16 Small-diameter side annular part 17 Column part 18 Pocket part 19 Through hole

Claims (3)

大径側円環部と、前記大径側円環部と同軸配置される小径側円環部と、前記大径側円環部と前記小径側円環部とを連結すべく、円周方向に略等間隔で複数配置される柱部と、円周方向に互いに隣り合う前記柱部の間に形成され、円すいころを転動可能に保持するポケット部と、を有する円すいころ軸受用保持器であって、
合成樹脂製であり、
前記大径側円環部、前記小径側円環部、及び前記柱部のうち前記大径側円環部の軸方向端面にのみ潤滑油逃げ用の貫通穴が設けられ、
前記貫通穴は前記大径側円環部を略軸方向に貫通するように形成され、
前記貫通穴の径方向寸法は前記大径側円環部の径方向の板厚の５０％以下であり、
前記貫通穴は前記ポケット部それぞれに対して円周方向に互いに離間して２個ずつ配置され、
これにより、軸受内部に流入する潤滑油は前記貫通穴を通過して排出されて、前記軸受内部での前記潤滑油の攪拌抵抗が低減することを特徴とする円すいころ軸受用保持器。 In order to connect the large diameter side annular part, the small diameter side annular part coaxially arranged with the large diameter side annular part, and the large diameter side annular part and the small diameter side annular part, the circumferential direction A tapered roller bearing retainer having a plurality of column portions arranged at substantially equal intervals on each other and a pocket portion formed between the column portions adjacent to each other in the circumferential direction so as to hold the tapered rollers in a rollable manner. Because
Made of synthetic resin,
A through hole for lubricating oil escape is provided only in the axial end surface of the large-diameter side annular part of the large-diameter side annular part, the small-diameter side annular part, and the column part,
The through hole is formed so as to penetrate the large-diameter side annular portion in a substantially axial direction,
The radial dimension of the through hole is 50% or less of the radial thickness of the large-diameter side annular portion,
The through-holes are arranged two by two apart from each other in the circumferential direction with respect to each of the pocket portions,
Accordingly, the lubricating oil flowing into the bearing is discharged through the through hole, and the stirring resistance of the lubricating oil inside the bearing is reduced . 前記貫通穴それぞれが前記柱部の近傍に設けられていることを特徴とする請求項１に記載の円すいころ軸受用保持器。   The tapered roller bearing retainer according to claim 1, wherein each of the through holes is provided in the vicinity of the column portion. 内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、前記外輪軌道面と前記内輪軌道面との間に転動可能に配設される複数の円すいころと、前記円すいころを円周方向に等間隔に保持する保持器と、を備える円すいころ軸受であって、
前記保持器が、請求項１又は２に記載の円すいころ軸受用保持器であることを特徴とする円すいころ軸受。 An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers arranged to be rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising: a retainer that holds the tapered rollers at equal intervals in a circumferential direction;
A tapered roller bearing, wherein the cage is a tapered roller bearing cage according to claim 1 or 2.
JP2008028967A 2008-02-08 2008-02-08 Tapered roller bearing cage and tapered roller bearing Expired - Fee Related JP5292842B2 (en)

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JP2006070926A (en) * 2004-08-31 2006-03-16 Nakanishi Metal Works Co Ltd Retainer for tapered roller bearing
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