JP5083023B2 - Tapered roller bearings - Google Patents

Tapered roller bearings Download PDF

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JP5083023B2
JP5083023B2 JP2008124602A JP2008124602A JP5083023B2 JP 5083023 B2 JP5083023 B2 JP 5083023B2 JP 2008124602 A JP2008124602 A JP 2008124602A JP 2008124602 A JP2008124602 A JP 2008124602A JP 5083023 B2 JP5083023 B2 JP 5083023B2
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ring
tapered roller
inner ring
outer peripheral
bearing
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JP2009275716A (en
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亮平 保坂
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JTEKT Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/52—Cages for rollers or needles with no part entering between, or touching, the bearing surfaces of the rollers
    • F16C33/523—Cages for rollers or needles with no part entering between, or touching, the bearing surfaces of the rollers with pins extending into holes or bores on the axis of 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
    • 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
    • F16C33/4605—Details of interaction of cage and race, e.g. retention or centring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4688—Cages for rollers or needles with rolling elements with smaller diameter than the load carrying rollers, e.g. cages with counter-rotating spacers
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
    • 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
    • F16C2360/00—Engines or pumps
    • F16C2360/31—Wind motors

Description

本発明は、円錐ころ軸受に関する。本発明は、特に、転動体が軸中心に沿った貫通穴を有する円錐ころであるころ軸受に関する。 The present invention relates to a tapered roller bearing. The present invention is particularly, rolling elements about the roller bearing is a tapered roller having a through-hole along the axial center.

従来、ころ軸受としては、特開２００５−１１４００６号公報に記載されている円錐ころ軸受がある。   Conventionally, as a roller bearing, there is a tapered roller bearing described in JP-A No. 2005-114006.

この円錐ころ軸受は、外輪、内輪、保持器アッセンブリを備える。上記外輪は、その円錐軌道面の軸方向の両側に鍔部を有さない一方、上記内輪は、その円錐軌道面の軸方向の大径側に大鍔を有し、その円錐軌道面の軸方向の小径側に小鍔を有する。   The tapered roller bearing includes an outer ring, an inner ring, and a cage assembly. The outer ring has no flanges on both sides in the axial direction of the conical raceway surface, while the inner ring has a large collar on the large diameter side in the axial direction of the conical raceway surface, and the axis of the conical raceway surface Has a small wrinkle on the small diameter side of the direction.

上記保持器アッセンブリは、複数の円錐ころと、ピンタイプ保持器とからなっている。   The cage assembly includes a plurality of tapered rollers and a pin type cage.

上記各円錐ころは、その軸中心に沿って延在する貫通穴を有している。上記ピンタイプ保持器は、小径環状部、大径環状部および複数のピンを有し、小径環状部は、周方向に等間隔に貫通穴を有する一方、大径環状部は、周方向に等間隔にねじ穴を有している。   Each of the tapered rollers has a through hole extending along the axial center thereof. The pin type retainer has a small-diameter annular portion, a large-diameter annular portion, and a plurality of pins. The small-diameter annular portion has through holes at regular intervals in the circumferential direction, while the large-diameter annular portion has a circumferential direction and the like. There are screw holes in the interval.

上記保持器アッセンブリは、上記円錐ころの貫通穴にピンを挿通した後、円錐ころの円錐外周面の小径側の貫通穴の開口から突出している部分の一部を、小径環状部の貫通穴に挿入した後、その一部を、小径環状部の貫通穴に溶接により固定する一方、上記円錐ころの円錐外周面の大径側の貫通穴の開口から突出している部分を、大径環状部のねじ穴に螺合により固定することにより、形成されている。   In the cage assembly, after inserting a pin into the through hole of the tapered roller, a part of the portion protruding from the opening of the small diameter side through hole of the outer peripheral surface of the tapered roller is used as the through hole of the small diameter annular portion. After the insertion, a part thereof is fixed to the through hole of the small diameter annular portion by welding, while the portion protruding from the opening of the large diameter side through hole of the conical outer peripheral surface of the tapered roller is the portion of the large diameter annular portion. It is formed by being screwed into the screw hole.

上記円錐ころ軸受では、保持器アッセンブリを作成した後、内輪に保持器アッセンブリを組み付けようとしても、内輪の小鍔と、円錐ころの大径端面とが接触して、内輪に保持器アッセンブリを組み込むことができない。   In the tapered roller bearing described above, after creating the cage assembly, even if the cage assembly is assembled to the inner ring, the small ring of the inner ring comes into contact with the large-diameter end surface of the tapered roller, and the cage assembly is assembled to the inner ring. I can't.

そこで、上記従来の円錐ころ軸受を、内輪の円錐軌道面に複数の円錐ころを配置した上で、ピンタイプ保持器を組み立て、最後に外輪を組み付けて、組み立てている。
特開２００５−１１４００６号公報（第１図） Therefore, the conventional tapered roller bearing is assembled by arranging a plurality of tapered rollers on the conical raceway surface of the inner ring, assembling the pin type cage, and finally assembling the outer ring.
Japanese Patent Laying-Open No. 2005-114006 (FIG. 1)

上記従来の円錐ころは、内輪の円錐軌道面に円錐ころを配置してから、保持器を組み立てなければならないから、組み立ての自由度が低くて、組み立てを行いにくい。   In the conventional tapered roller, since the retainer must be assembled after the tapered roller is arranged on the conical raceway surface of the inner ring, the degree of freedom in assembly is low and it is difficult to assemble.

また、上記従来の円錐ころは、内輪の円錐軌道面に複数の円錐ころを配置した上で、ピンタイプ保持器を組み立てなければならないが、ピンタイプ保持器の組み立ての際の溶接工程で、溶接によるスパッタが発生し、このスパッタが、内輪の外周面等を汚染するのを避けがたい。そして、上記内輪の外周面等に飛び散ったスパッタを取り除くのに多数の工数を要し、生産性が格段に悪くなると共に、製造コストが高くなる。   In addition, the conventional tapered roller has to be assembled with a pin type cage after disposing a plurality of tapered rollers on the conical raceway surface of the inner ring. In the welding process at the time of assembling the pin type cage, It is difficult to avoid spattering due to this, and this spattering contaminates the outer peripheral surface of the inner ring. Further, many man-hours are required to remove the spatter scattered on the outer peripheral surface of the inner ring, and the productivity is remarkably deteriorated and the manufacturing cost is increased.

特に、風力発電機の主軸の支持用の円錐ころ軸受は、サイズが非常に大きいため、上記スパッタの除去が大変である。更には、特に、大型の軸受において、軽量化や、保持器の挙動の安定化の要請がある。   In particular, since the tapered roller bearing for supporting the main shaft of the wind power generator is very large, it is difficult to remove the spatter. Furthermore, there is a demand for reducing the weight and stabilizing the behavior of the cage, particularly for large bearings.

そこで、本発明の課題は、生産性が高くて、製造コストが低くて、構成部品の汚染も心配がなく、かつ、軽くて、安定した保持器の挙動を実現できる円錐ころ軸受を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide a tapered roller bearing that has high productivity, low manufacturing cost, is free from concern about contamination of components, and is light and can realize stable cage behavior. It is in.

上記課題を解決するため、この発明の円錐ころ軸受は、
円錐軌道面を有する外輪と、
円錐軌道面を有する内輪と、
上記外輪の上記円錐軌道面と上記内輪の上記円錐軌道面との間に配置された複数の円錐ころと、
リング部と、このリング部につながっていると共に、上記リング部の周方向に互いに間隔をおいて位置する複数の棒状部と、上記各棒状部の上記リング部側とは反対側の端部の外周面に夫々取り付けられた軸受とを有する保持器と
を備え、
上記各円錐ころは、その円錐ころの軸中心に沿って延在する貫通穴を有し、
上記棒状部は、上記円錐ころの上記貫通穴に挿通されており、
上記軸受の外周面は、上記内輪の外周面で案内されており、
上記各棒状部の上記リング部側とは反対側の端部は、上記各棒状部における上記内輪の上記円錐軌道面の大径側の端部であることを特徴としている。 In order to solve the above problems, the tapered roller bearing of the present invention is
An outer ring having a conical raceway surface;
An inner ring having a conical raceway surface;
A plurality of tapered rollers disposed between the conical raceway surface of the outer ring and the conical raceway surface of the inner ring;
A ring portion, a plurality of rod-shaped portions connected to the ring portion and spaced apart from each other in the circumferential direction of the ring portion, and an end portion of each rod-shaped portion opposite to the ring portion side A cage having a bearing attached to each of the outer peripheral surfaces,
Each of the tapered rollers has a through hole extending along the axial center of the tapered roller,
The rod-shaped portion is inserted through the through hole of the tapered roller,
The outer peripheral surface of the bearing is guided by the outer peripheral surface of the inner ring ,
The above ring portion side of the respective rod-like portion the opposite end is characterized ends der Rukoto of the large diameter side of the tapered raceway surface of the inner ring in each of the bar-shaped portion.

尚、上記各棒状部に取り付けられる軸受としては、例えば、玉やころ等の転動体を有する軸受（内輪を有していてもいなくてもどちらでも良い）や、転動体を有さないすべり軸受等がある。   In addition, as a bearing attached to each said rod-shaped part, for example, a bearing having a rolling element such as a ball or a roller (which may or may not have an inner ring) or a sliding bearing not having a rolling element Etc.

本発明によれば、保持器の各棒状部のリング部側とは反対側の端部が、棒状部の外周面に軸受を取り付けている構成であって、棒状部の上記端部を、保持器の軸中心に対して、容易かつ大きく歪ませることができる構成であるから、例えば、リング部および棒状部を、リングの貫通穴にピンを溶接固定して構成する場合においても、保持器および円錐ころからなる保持器アッセンブリを構成した後でも、ピンのリング側とは反対側の端部を、歪ませるようにして、この保持器アッセンブリを、内輪に組み込むことができる。したがって、リング部にピンを固定する構成において、その固定手段として溶接を用いた場合において、溶接の際に発生するスパッタが内輪を汚すことがなく、また、内輪にスパッタが付着することがないから、内輪からスパッタを除去する必要がなくて、生産性を向上させることができる。 According to the present invention, the end of each cage portion opposite to the ring portion side has a configuration in which a bearing is attached to the outer peripheral surface of the rod portion, and holds the end portion of the rod portion. For example, in the case where the ring part and the rod-like part are configured by welding and fixing a pin to the through hole of the ring, the cage and Even after the cage assembly composed of tapered rollers is constructed, the cage assembly can be incorporated into the inner ring such that the end of the pin opposite to the ring side is distorted. Accordingly, in the configuration in which the pin is fixed to the ring portion, when welding is used as the fixing means, spatter generated during welding does not contaminate the inner ring, and spatter does not adhere to the inner ring. It is not necessary to remove spatter from the inner ring, and productivity can be improved.

尚、リング部および棒状部を、リングの貫通穴にピンを固定して構成する場合、上記リングの貫通穴に対するピンの一端部の固定を、圧入や、螺合等、溶接以外の手段によって行うことができることは勿論である。また、リング部および棒状部を、プレス成形により一体に形成しても良いことも勿論である。   When the ring part and the rod-like part are configured by fixing a pin to the through hole of the ring, the one end part of the pin is fixed to the through hole of the ring by means other than welding, such as press fitting or screwing. Of course you can. Of course, the ring portion and the rod-like portion may be integrally formed by press molding.

また、本発明によれば、保持器の構成が、対応するピン保持器、すなわち、二つのリング部および複数の棒状部を有するピン保持器と比較して、保持器の一方の側に、リング部の替わりに軽量かつ安価な複数の軸受を配置する構成であるから、円錐ころ軸受を軽量化できると共に、円錐ころ軸受の製造コストを低減できる。特に、円錐ころ軸受のサイズが大きい場合において、円錐ころ軸受を格段に軽量化でき、円錐ころ軸受の製造コストを格段に低減できる。 Further, according to the present invention, the structure of the cage is such that the ring on one side of the cage is compared with the corresponding pin cage, that is, the pin cage having two ring portions and a plurality of rod-like portions. since parts are instead configured to arrange the lightweight and inexpensive multiple bearings of, along with the tapered roller bearing can be lightweight, it can reduce the manufacturing cost of the tapered roller bearings. In particular, when the size of the tapered roller bearing is large, the tapered roller bearing can be significantly reduced in weight, and the manufacturing cost of the tapered roller bearing can be significantly reduced.

また、本発明によれば、上記保持器が有する軸受の外周面が、上記内輪の外周面で案内される構成であるから、保持器の挙動を安定させることができる。   According to the present invention, since the outer peripheral surface of the bearing of the cage is guided by the outer peripheral surface of the inner ring, the behavior of the cage can be stabilized.

本発明の円錐ころ軸受によれば、内輪がスパッタで汚れることがなく、かつ、内輪からスパッタを除去する必要がないから、生産性が向上する。 According to the tapered roller bearing of the present invention, the inner ring is not contaminated by spatter, and it is not necessary to remove spatter from the inner ring, so that productivity is improved.

また、本発明の円錐ころ軸受によれば、保持器の一方の側に、重くて材料費を要する環状部の替わりに、軽くて安価な軸受を配置することができるから、円錐ころ軸受の軽量化と、円錐ころ軸受の製造コストを低減できる。 Further, according to the tapered roller bearing of the present invention, on one side of the cage, heavy instead of annulus requiring material costs, light and because it is possible to arrange an inexpensive bearings, tapered roller bearings weight And the manufacturing cost of the tapered roller bearing can be reduced.

また、本発明の円錐ころ軸受によれば、保持器が有する軸受の外周面が、内輪の外周面で案内される構成であるから、保持器の挙動を安定させることができる。 Moreover, according to the tapered roller bearing of the present invention, the outer peripheral surface of the bearing of the cage is configured to be guided by the outer peripheral surface of the inner ring, so that the behavior of the cage can be stabilized.

以下、本発明を図示の形態により詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the drawings.

図１は、本発明の一実施形態の円錐ころ軸受の軸方向の断面図である。 Figure 1 is an axial sectional view of a tapered roller bearing of an embodiment of the present invention.

この円錐ころ軸受は、外輪１、内輪２、保持器３、および、複数の円錐ころ４を備える。   The tapered roller bearing includes an outer ring 1, an inner ring 2, a cage 3, and a plurality of tapered rollers 4.

上記外輪１は、内周側に軌道面としての円錐軌道面１１を有する。   The outer ring 1 has a conical raceway surface 11 as a raceway surface on the inner peripheral side.

一方、上記内輪２は、外周側に軌道面としての円錐軌道面２１を有する。上記内輪２は、円錐軌道面２１の小径側に小鍔部２２を有する一方、円錐軌道面２１の大径側に大鍔部２３を有する。   On the other hand, the inner ring 2 has a conical raceway surface 21 as a raceway surface on the outer peripheral side. The inner ring 2 has a small flange portion 22 on the small diameter side of the conical raceway surface 21, and a large collar portion 23 on the large diameter side of the conical raceway surface 21.

上記保持器３は、リング部であるリング３１と、複数のピン３２と、玉軸受３３と、ナット３４とを有する。   The cage 3 includes a ring 31 that is a ring portion, a plurality of pins 32, a ball bearing 33, and a nut 34.

上記リング３１は、複数の貫通穴３９を有している。上記複数の貫通穴３９は、リング３１の周方向に略同一の間隔をおいて配置されている。上記リング３１の各貫通穴３９の内周面には、雌ねじが形成されている。   The ring 31 has a plurality of through holes 39. The plurality of through holes 39 are arranged at substantially the same interval in the circumferential direction of the ring 31. A female thread is formed on the inner peripheral surface of each through hole 39 of the ring 31.

上記各ピン３２は、棒状部を構成している。上記ピン３２の一端部の外周面には、雄ねじが形成されている。また、上記ピン３２の他端部の外周面は、段部と、円筒外周面からなる軸受嵌合い部と、雄ねじ部とを有している。上記軸受嵌合い部は、上記段部よりもピン３２の軸方向の外方に位置し、上記雄ねじ部は、上記軸受嵌合い部よりも軸方向の外方に位置している。   Each pin 32 constitutes a rod-like part. A male screw is formed on the outer peripheral surface of one end of the pin 32. The outer peripheral surface of the other end portion of the pin 32 has a stepped portion, a bearing fitting portion composed of a cylindrical outer peripheral surface, and a male screw portion. The bearing fitting portion is positioned outward in the axial direction of the pin 32 with respect to the stepped portion, and the male screw portion is positioned outward in the axial direction with respect to the bearing fitting portion.

上記各ピン３２は、リング３１につながっている。詳しくは、上記ピン３２の上記一端部の外周面をリング３１の貫通穴３９の内周面に螺合して、ピン３２をリング３１に固定している。また、上記玉軸受３３は、ピン２１の上記軸受嵌合い部に外嵌されて固定されている。上記ナット３４を、ピン３２の他端部の上記雄ねじ部に螺合して、玉軸受３３を上記段部の方に押圧することにより、玉軸受３３を、ピン３２の他端部に固定している。   Each pin 32 is connected to the ring 31. Specifically, the pin 32 is fixed to the ring 31 by screwing the outer peripheral surface of the one end of the pin 32 to the inner peripheral surface of the through hole 39 of the ring 31. Further, the ball bearing 33 is externally fitted and fixed to the bearing fitting portion of the pin 21. The nut 34 is screwed into the male threaded portion at the other end of the pin 32 and the ball bearing 33 is pressed toward the stepped portion, thereby fixing the ball bearing 33 to the other end of the pin 32. ing.

上記各円錐ころ４は、貫通穴４１を有している。上記貫通穴４１は、円錐ころ４の軸中心に沿って延在している。この円錐ころ４の貫通穴４１には、上記ピン３２が挿通されている。上記各円錐ころ４は、ピン３２の軸方向において、リング３１と玉軸受３３との間に位置している。上記複数の円錐ころ４は、外輪１の軌道溝１１と、内輪２の軌道溝２１との間に、保持器３によって保持された状態で、周方向に互いに間隔をおいて配置されている。   Each tapered roller 4 has a through hole 41. The through hole 41 extends along the axial center of the tapered roller 4. The pin 32 is inserted into the through hole 41 of the tapered roller 4. Each of the tapered rollers 4 is located between the ring 31 and the ball bearing 33 in the axial direction of the pin 32. The plurality of tapered rollers 4 are disposed between the raceway groove 11 of the outer ring 1 and the raceway groove 21 of the inner ring 2 at intervals in the circumferential direction while being held by the cage 3.

図２は、上記実施形態の円錐ころ軸受を、内輪２１の大鍔部２３側の軸方向の外方から見た時の、内輪２および保持器３の模式図である。   FIG. 2 is a schematic view of the inner ring 2 and the cage 3 when the tapered roller bearing of the above-described embodiment is viewed from the outside in the axial direction on the side of the large collar portion 23 of the inner ring 21.

尚、図２においては、ナット３４の図示を省略している。   In addition, illustration of the nut 34 is abbreviate | omitted in FIG.

図２に示すように、上記複数のピン３２は、内輪２の周方向に等間隔に配置されている。上記玉軸受３３の外周面３８は、内輪２の外周面２７に接している。図１および図２に示すように、上記玉軸受３３の外周面３８は、内輪２１の大鍔部２３の外周面に案内されている。   As shown in FIG. 2, the plurality of pins 32 are arranged at equal intervals in the circumferential direction of the inner ring 2. The outer peripheral surface 38 of the ball bearing 33 is in contact with the outer peripheral surface 27 of the inner ring 2. As shown in FIGS. 1 and 2, the outer peripheral surface 38 of the ball bearing 33 is guided by the outer peripheral surface of the large collar portion 23 of the inner ring 21.

上記実施形態の円錐ころ軸受によれば、保持器３が、リング３１の貫通穴にピン３２の一端部を固定すると共に、ピン３２の他端部の外周面に玉軸受３３を外嵌して固定する構成であって、保持器３の構成が、対応するピン保持器と比較して、保持器３の一方の側に、リングの替わりに、軽量かつ安価な複数の玉軸受３３を配置する構成であるから、円錐ころ軸受を軽量化できると共に、円錐ころ軸受の製造コストを低減できる。また、風力発電機の主軸支持用の円錐ころ軸受のように、円錐ころ軸受が大型である場合に、円錐ころ軸受を格段に軽量化できると共に、円錐ころ軸受の製造コストを格段に低減できる。   According to the tapered roller bearing of the above embodiment, the cage 3 fixes one end of the pin 32 to the through hole of the ring 31 and externally fits the ball bearing 33 to the outer peripheral surface of the other end of the pin 32. A plurality of ball bearings 33 that are light and inexpensive are arranged instead of a ring on one side of the cage 3 as compared with the corresponding pin cage. Since it is a structure, while reducing a tapered roller bearing, the manufacturing cost of a tapered roller bearing can be reduced. Further, when the tapered roller bearing is large like the tapered roller bearing for supporting the main shaft of the wind power generator, the tapered roller bearing can be remarkably reduced in weight, and the manufacturing cost of the tapered roller bearing can be significantly reduced.

また、上記実施形態の円錐ころ軸受によれば、上記保持器３が有する玉軸受３３の外周面３８が、内輪２の外周面で案内される構成であるから、保持器３の挙動を安定させることができる。   Further, according to the tapered roller bearing of the above embodiment, the outer peripheral surface 38 of the ball bearing 33 included in the retainer 3 is configured to be guided by the outer peripheral surface of the inner ring 2, so that the behavior of the retainer 3 is stabilized. be able to.

尚、上記実施形態の円錐ころ軸受では、リング３１とピン３２との固定を、螺合により行ったが、この発明では、リングとピンとの固定を、圧入を行った後、溶接することにより行っても良い。この場合、保持器のピンのリング側とは反対側の端部が、ピンの外周面に玉軸受を固定している構成であって、ピンのその端部を、保持器の軸中心に対して、容易かつ大きく歪ませることができる構成であるから、溶接を用いて保持器および円錐ころからなる保持器アッセンブリを構成した後でも、ピンのリング側とは反対側の端部を、歪ませるようにして、この保持器アッセンブリを、内輪に組み込むことができる。したがって、この場合において、溶接の際に発生するスパッタが内輪を汚すことがなく、また、内輪にスパッタが付着することがないから、内輪からスパッタを除去する必要がなくて、生産性を向上させることができる。 In the tapered roller bearing of the above embodiment, the ring 31 and the pin 32 are fixed by screwing. In the present invention, the ring and the pin are fixed by press-fitting and welding. May be. In this case, the end of the cage pin opposite to the ring side is a configuration in which a ball bearing is fixed to the outer peripheral surface of the pin, and the end of the pin is positioned with respect to the axial center of the cage. Therefore, the end of the pin opposite to the ring side is distorted even after the cage assembly composed of the cage and the tapered roller is constructed by welding. In this way, the cage assembly can be incorporated into the inner ring. Therefore, in this case, spatter generated during welding does not contaminate the inner ring, and spatter does not adhere to the inner ring. Therefore, it is not necessary to remove spatter from the inner ring, thereby improving productivity. be able to.

尚、上記実施形態の円錐ころ軸受では、ピン３２の段部およびナット３４を用いて、ピン３２に玉軸受３３を固定したが、この発明では、ナットを使用せずに、棒状部の外周面に、転がり軸受の内輪を締まり嵌めにより固定しても良いし、締まり嵌めをしたうえ、ナットを用いて固定しても良い。   In the tapered roller bearing of the above embodiment, the ball bearing 33 is fixed to the pin 32 by using the step portion of the pin 32 and the nut 34. However, in the present invention, the outer peripheral surface of the rod-like portion is used without using the nut. In addition, the inner ring of the rolling bearing may be fixed by an interference fit, or may be fixed using a nut after an interference fit.

また、上記実施形態の円錐ころ軸受では、ピン３２のリング３１側とは反対側の端部に玉軸受３３を固定したが、この発明では、ピンのリング側とは反対側の端部に、ころ軸受等、玉軸受以外の転がり軸受を外嵌して固定しても良い。   Further, in the tapered roller bearing of the above embodiment, the ball bearing 33 is fixed to the end of the pin 32 opposite to the ring 31 side, but in this invention, the end of the pin opposite to the ring side is A rolling bearing other than a ball bearing such as a roller bearing may be externally fitted and fixed.

また、上記実施形態の円錐ころ軸受では、ピン３２のリング３１側とは反対側の端部に、転がり軸受（本実施形態では、玉軸受３３）の内輪を固定する構成であったが、この発明では、棒状部に取り付けられる軸受は、棒状部に内輪を固定しない構成であっても良い。   Further, in the tapered roller bearing of the above embodiment, the inner ring of the rolling bearing (in this embodiment, the ball bearing 33) is fixed to the end of the pin 32 opposite to the ring 31 side. In the invention, the bearing attached to the rod-shaped portion may be configured such that the inner ring is not fixed to the rod-shaped portion.

例えば、この発明では、棒状部のリング側とは反対側の端部の外周面に取り付けられる軸受は、筒状部を有する内輪接触部材と、複数の転動体（例えば、玉や、ころ（円筒ころ、円錐ころ、凸面ころ）等）とを有して、上記複数の転動体が、上記内輪接触部材の上記筒状部の内周面と、棒状部のリング側とは反対側の端部の外周面との間に、棒状部の周方向に間隔をおいて配置される構成であっても良い。尚、この場合、棒状部の外周面の一部を、軌道面として利用すること、また、上記内輪接触部材の上記筒状部の外周面が、本発明のころ軸受の内輪の外周面で案内されることは、言うまでもない。   For example, in the present invention, the bearing attached to the outer peripheral surface of the end opposite to the ring side of the rod-shaped portion includes an inner ring contact member having a cylindrical portion and a plurality of rolling elements (for example, balls and rollers (cylinders). End of the inner ring contact member on the side opposite to the ring side and the inner circumferential surface of the cylindrical part of the inner ring contact member The structure arrange | positioned at intervals in the circumferential direction of a rod-shaped part may be sufficient. In this case, a part of the outer peripheral surface of the rod-shaped portion is used as a raceway surface, and the outer peripheral surface of the cylindrical portion of the inner ring contact member is guided by the outer peripheral surface of the inner ring of the roller bearing of the present invention. It goes without saying that it is done.

また、この発明では、棒状部のリング側とは反対側の端部の外周面に取り付けられる軸受は、転動体を有する軸受でなくても良く、例えば、すべり軸受であっても良い。詳しくは、この発明では、棒状部のリング側とは反対側の端部の外周面に取り付けられる軸受は、円筒部を有するブッシュ等の環状部材を有し、この環状部材の内周面が、棒状部のリング側とは反対側の端部の外周面に径方向に対向するように、上記環状部材を、上記棒状部の上記端部の外周面に取り付けた構成であっても良い。そして、環状部材の内周面と、上記棒状部の上記端部の外周面とが、油膜をはさんですべり運動する構成であっても良い。尚、この場合、環状部材の外周面が、本発明のころ軸受の内輪の外周面で案内されることは、言うまでもない。   In the present invention, the bearing attached to the outer peripheral surface of the end of the rod-like portion opposite to the ring side may not be a bearing having rolling elements, and may be, for example, a sliding bearing. Specifically, in the present invention, the bearing attached to the outer peripheral surface of the end opposite to the ring side of the rod-shaped portion has an annular member such as a bush having a cylindrical portion, and the inner peripheral surface of the annular member is The structure may be such that the annular member is attached to the outer peripheral surface of the end portion of the rod-shaped portion so as to face the outer peripheral surface of the end portion opposite to the ring side of the rod-shaped portion in the radial direction. And the structure which an inner peripheral surface of an annular member and the outer peripheral surface of the said edge part of the said rod-shaped part carry out sliding motion on both sides of an oil film may be sufficient. In this case, it goes without saying that the outer peripheral surface of the annular member is guided by the outer peripheral surface of the inner ring of the roller bearing of the present invention.

また、上記実施形態の円錐ころ軸受では、リング部および棒状部を、ピン３２をリング３１に固定することにより構成したが、この発明では、リング部および棒状部を、プレス成形により一体成形しても良い。   Further, in the tapered roller bearing of the above embodiment, the ring portion and the rod-shaped portion are configured by fixing the pin 32 to the ring 31, but in the present invention, the ring portion and the rod-shaped portion are integrally formed by press molding. Also good.

本発明の一実施形態の円錐ころ軸受の軸方向の断面図である。It is sectional drawing of the axial direction of the tapered roller bearing of one Embodiment of this invention. 上記実施形態の円錐ころ軸受を、内輪の大鍔部側の軸方向の外方から見た時の、内輪および保持器の模式図である。It is a schematic diagram of an inner ring | wheel and a holder | retainer when the tapered roller bearing of the said embodiment is seen from the axial direction outward of the large collar part side of an inner ring | wheel.

１ 外輪
２ 内輪
３ 保持器
４ 円錐ころ
１１ 円錐軌道面
２１ 円錐軌道面
２３ 大鍔部
２７ 外周面
３１ リング
３２ ピン
３３ 玉軸受
３４ ナット
３８ 玉軸受の外周面
４１ 円錐ころの貫通穴 DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Cage 4 Tapered roller 11 Conical raceway surface 21 Conical raceway surface 23 Large collar part 27 Outer peripheral surface 31 Ring 32 Pin 33 Ball bearing 34 Nut 38 Outer peripheral surface of ball bearing 41 Through hole of tapered roller

Claims (1)

円錐軌道面を有する外輪と、
円錐軌道面を有する内輪と、
上記外輪の上記円錐軌道面と上記内輪の上記円錐軌道面との間に配置された複数の円錐ころと、
リング部と、このリング部につながっていると共に、上記リング部の周方向に互いに間隔をおいて位置する複数の棒状部と、上記各棒状部の上記リング部側とは反対側の端部の外周面に夫々取り付けられた軸受とを有する保持器と
を備え、
上記各円錐ころは、その円錐ころの軸中心に沿って延在する貫通穴を有し、
上記棒状部は、上記円錐ころの上記貫通穴に挿通されており、
上記軸受の外周面は、上記内輪の外周面で案内されており、
上記各棒状部の上記リング部側とは反対側の端部は、上記各棒状部における上記内輪の上記円錐軌道面の大径側の端部であることを特徴とする円錐ころ軸受。 An outer ring having a conical raceway surface;
An inner ring having a conical raceway surface;
A plurality of tapered rollers disposed between the conical raceway surface of the outer ring and the conical raceway surface of the inner ring;
A ring portion, a plurality of rod-shaped portions connected to the ring portion and spaced apart from each other in the circumferential direction of the ring portion, and an end portion of each rod-shaped portion opposite to the ring portion side A cage having a bearing attached to each of the outer peripheral surfaces,
Each of the tapered rollers has a through hole extending along the axial center of the tapered roller,
The rod-shaped portion is inserted through the through hole of the tapered roller,
The outer peripheral surface of the bearing is guided by the outer peripheral surface of the inner ring ,
It said end opposite to the said ring portion side of the rod-shaped portion is a tapered roller bearing and said end portion der Rukoto of the large diameter side of the tapered raceway surface of the inner ring in each of the bar-shaped portion.
JP2008124602A 2008-05-12 2008-05-12 Tapered roller bearings Expired - Fee Related JP5083023B2 (en)

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Publication number Priority date Publication date Assignee Title
DE2332897A1 (en) * 1973-06-28 1975-01-23 Schaeffler Ohg Industriewerk Roller bearing cage for large radial thrust bearings - has keep-ring or keep-plates to hold rollers on shafts in position
DE4232433C2 (en) * 1992-09-28 2000-05-11 Skf Gmbh Cage guide for roller bearings, especially for axial cylindrical roller bearings
JPH11325063A (en) * 1998-05-14 1999-11-26 Nippon Seiko Kk Roller bearing
JP4884886B2 (en) * 2005-09-01 2012-02-29 Ｎｔｎ株式会社 Roller bearing
JP2007162750A (en) * 2005-12-09 2007-06-28 Ntn Corp Rolling bearing and spindle supporting structure of wind power generator

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