JP2013245706A - Split cage for rolling bearing - Google Patents

Split cage for rolling bearing Download PDF

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Publication number
JP2013245706A
JP2013245706A JP2012117937A JP2012117937A JP2013245706A JP 2013245706 A JP2013245706 A JP 2013245706A JP 2012117937 A JP2012117937 A JP 2012117937A JP 2012117937 A JP2012117937 A JP 2012117937A JP 2013245706 A JP2013245706 A JP 2013245706A
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Prior art keywords
cage
segment
rim
rim portion
cage segment
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Japanese (ja)
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Hideki Fujiwara
英樹 藤原
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JTEKT Corp
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JTEKT Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/50—Cages for rollers or needles formed of interconnected members, e.g. chains
    • F16C33/502—Cages for rollers or needles formed of interconnected members, e.g. chains formed of arcuate segments retaining one or more rollers or needles
    • 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
    • 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
    • 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

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

Abstract

PROBLEM TO BE SOLVED: To provide a split cage capable of ensuring integrity of a plurality of cage segments and allowing easy and efficient assembling of a rolling bearing.SOLUTION: A split cage 1 for a rolling bearing comprises cage segments 2, which have a plurality of pockets 24 for accommodating rolling elements and are annularly arranged along a circumference direction. A projection 21c of a first cage segment 2A overlaps an end of a second cage segment 2B adjoining thereto. The projection 21c of the first cage segment 2A and a first column part 23 of the second cage segment 2B are connected by a pin 25 and a hole 26. One end face 21a of a first rim part 21 of the first cage segment 2A and the other end face 21b of the first rim part 21 of the second cage segment 2B are abutted to each other while relative movement in a radial direction is restricted.

Description

この発明は、複数の保持器セグメントを環状に配列した転がり軸受用の分割保持器に関する。   The present invention relates to a split cage for a rolling bearing in which a plurality of cage segments are annularly arranged.

従来、水平軸プロペラ式の風力発電装置においては、ブレードを取り付ける主軸を回転自在に支持するために、転がり軸受が用いられている。近年、風力発電装置の大型化に伴って、主軸の直径が数メートルを超えることもあり、このような大型の主軸を支持するために、転がり軸受も大型化している。大型の転がり軸受に用いられる保持器として、合成樹脂製の保持器が用いられる場合がある。この合成樹脂製の保持器は、溶接で組み立てる金属製の保持器に較べて、軽量であるとともに精度も確保し易いという利点がある。しかし、直径の大きい合成樹脂製の保持器を、射出成形で一体成形することは困難である。そこで、周方向に複数に分割した分割保持器が用いられている（例えば特許文献１参照）。この分割保持器は、複数の保持器セグメントを環状に配列したものである。   Conventionally, in a horizontal axis propeller-type wind power generator, a rolling bearing is used to rotatably support a main shaft to which a blade is attached. In recent years, with the increase in size of wind power generators, the diameter of the main shaft may exceed several meters, and in order to support such a large main shaft, the rolling bearing is also increased in size. As a cage used for a large-sized rolling bearing, a synthetic resin cage may be used. This cage made of synthetic resin is advantageous in that it is lightweight and easy to ensure accuracy compared to a metal cage assembled by welding. However, it is difficult to integrally mold a cage made of a synthetic resin having a large diameter by injection molding. Therefore, a split cage that is divided into a plurality in the circumferential direction is used (see, for example, Patent Document 1). This divided cage is formed by annularly arranging a plurality of cage segments.

図６は従来の保持器セグメントの一例を示す要部斜視図であり、図７は従来の保持器セグメントを用いた円すいころ軸受を示す要部断面図である。この保持器セグメント１００は、所定間隔離して対向させた一対の第１，第２リム部１０１，１０２と、この第１，第２リム部１０１，１０２の間に架設した複数の柱部１０３とを有しており、隣合う柱部１０３と第１，第２リム部１０１，１０２とによって囲まれる空間を、転動体としての円すいころ１１３（図７参照）を収容するポケット１０４として構成している。前記保持器セグメント１００は、射出成形によって成形された合成樹脂製のものである。   FIG. 6 is a main part perspective view showing an example of a conventional cage segment, and FIG. 7 is a main part sectional view showing a tapered roller bearing using the conventional cage segment. The cage segment 100 includes a pair of first and second rim portions 101 and 102 opposed to each other at a predetermined interval, and a plurality of column portions 103 installed between the first and second rim portions 101 and 102. A space surrounded by the adjacent pillar portion 103 and the first and second rim portions 101 and 102 is configured as a pocket 104 that accommodates a tapered roller 113 (see FIG. 7) as a rolling element. Yes. The cage segment 100 is made of a synthetic resin molded by injection molding.

円すいころ軸受１１０は、外輪１１１と内輪１１２との間に複数の円すいころ１１３を配列し、各円すいころ１１３を、複数の前記保持器セグメント１００からなる分割保持器１２０によって保持している。内輪１１２の外周には、各円すいころ１１３が転走する軌道面１１２ａが形成されており、この軌道面１１２ａを挟んで、円すいころ１１３の端面が接触する大鍔部１１２ｂと小鍔部１１２ｃとが設けられている。
前記円すいころ軸受１１０は、例えば、各保持器セグメント１００を、内輪１１２の外周に沿って環状に配列し、各保持器セグメント１００のポケット１０４に円すいころ１１３を順次挿入した後、各円すいころ１１３に外接するように外輪１１１を嵌め込むことにより組み立てられる。 In the tapered roller bearing 110, a plurality of tapered rollers 113 are arranged between the outer ring 111 and the inner ring 112, and each tapered roller 113 is held by a divided cage 120 including a plurality of the cage segments 100. On the outer periphery of the inner ring 112, a raceway surface 112a on which each tapered roller 113 rolls is formed. Is provided.
In the tapered roller bearing 110, for example, the cage segments 100 are arranged in an annular shape along the outer periphery of the inner ring 112, and the tapered rollers 113 are sequentially inserted into the pockets 104 of the cage segments 100, and then the tapered rollers 113. It is assembled by fitting the outer ring 111 so as to circumscribe the ring.

ところが、従来の分割保持器１２０は、各保持器セグメント１００どうしが分離されているので、各保持器セグメント１００を内輪１１２の外周面に沿って環状に配列する際に、保持器セグメント１００が内輪１１２から脱落し易い。また、保持器セグメント１００を環状に配列した状態で、各ポケット１０４に円すいころ１１３を挿入する際に、保持器セグメント１００が円すいころ１１３とともに内輪１１２から脱落し易い。このため、各保持器セグメント１００を環状に配列したり、ポケット１０４に円すいころ１１３を挿入したりする作業が困難であり、円すいころ軸受１１０を組み立てるのに多くの工数を要するという問題があった。   However, in the conventional split cage 120, the cage segments 100 are separated from each other. Therefore, when the cage segments 100 are annularly arranged along the outer peripheral surface of the inner ring 112, the cage segments 100 are arranged in the inner ring. It is easy to drop off 112. In addition, when the tapered roller 113 is inserted into each pocket 104 with the cage segment 100 arranged in an annular shape, the cage segment 100 easily falls off the inner ring 112 together with the tapered roller 113. Therefore, it is difficult to arrange the cage segments 100 in an annular shape or insert the tapered rollers 113 into the pockets 104, and there is a problem that many man-hours are required to assemble the tapered roller bearing 110. .

そこで、特許文献２には、保持器セグメントの一端部に設けた凸部と、これに隣接する保持器セグメントの一端部に設けた径方向に貫通する開口とを嵌合させることにより、隣合う保持器セグメントどうしを連結した分割保持器が開示されている。   Therefore, Patent Document 2 adjoins a convex portion provided at one end portion of the cage segment by fitting a radially penetrating opening provided at one end portion of the cage segment adjacent thereto. A split cage in which cage segments are connected to each other is disclosed.

ヨーロッパ特許公報ＥＰ２２６４３２５（Ａ１）European Patent Publication EP 2264325 (A1) 特開２００３−１２０６８０号公報Japanese Patent Laid-Open No. 2003-120680

特許文献２に記載の分割保持器は、隣合う保持器どうしが連結されているので、各保持器セグメントを内輪の外周面に沿って環状に配列する際に、保持器セグメントが内輪から脱落するのを抑制することができる。しかし、前記開口が径方向に貫通しているので、隣合う保持器セグメントの周方向の連結強度は確保できるものの、径方向の連結強度は確保し難い。このため、風力発電装置等に用いられる大型の転がり軸受の分割保持器において、特許文献２に記載の連結構造を採用したとしても、各ポケットに円すいころを挿入する際に、隣合う保持器セグメントの連結部分が径方向に拡がって、その連結が外れ、転動体とともに内輪から脱落し易いという問題が残存している。   Since the adjacent cages are connected to each other in the split cage described in Patent Document 2, when the cage segments are annularly arranged along the outer peripheral surface of the inner ring, the cage segments fall off from the inner ring. Can be suppressed. However, since the opening penetrates in the radial direction, the connection strength in the circumferential direction between adjacent cage segments can be ensured, but the connection strength in the radial direction is difficult to ensure. For this reason, even in the split cage of a large-sized rolling bearing used for a wind power generator or the like, even when the connecting structure described in Patent Document 2 is adopted, when inserting a tapered roller into each pocket, adjacent cage segments However, the connection part is expanded in the radial direction, the connection is disengaged, and the problem remains that it easily falls off the inner ring together with the rolling elements.

この発明は、前記問題点に鑑みてなされたものであり、各保持器セグメントの周方向及び径方向の連結強度を確保することができ、転がり軸受を容易且つ効率的に組み立てることができる転がり軸受用の分割保持器を提供することを目的とする。   The present invention has been made in view of the above problems, and can ensure the circumferential and radial coupling strength of each cage segment, and can easily and efficiently assemble a rolling bearing. An object of the present invention is to provide a split cage for the use.

前記目的を達成するためのこの発明の転がり軸受用の分割保持器は、所定間隔離して対向させた第１，第２リム部と、この第１，第２リム部の間に架設した複数の柱部とを有し、隣合う柱部の相互間を、転動体を収容するポケットとして構成している複数の合成樹脂製の保持器セグメントを、周方向に沿って環状に配列した転がり軸受用の分割保持器であって、各保持器セグメントの第１リム部の端部に、第２リム部よりも周方向に突出する突出部を設け、隣合う一方の保持器セグメントの前記突出部を、他方の保持器セグメントの端部にオーバーラップさせて、当該他方の保持器セグメントの端部における第１リム部として構成しているとともに、前記一方の保持器セグメントの突出部と他方の保持器セグメントの端部の柱部とを、当該突出部及び柱部の何れか一方に形成した軸方向に延びるピンと、何れか他方に形成した軸方向に延びる孔とを嵌合させて連結し、前記一方の保持器セグメントの第１リム部の端面と、他方の保持器セグメントの第１リム部の端面とを、径方向への相対移動を規制した状態で突き合わせていることを特徴としている。   In order to achieve the above object, a split cage for a rolling bearing according to the present invention includes a first rim portion and a second rim portion which are opposed to each other with a predetermined distance therebetween, and a plurality of ridge portions installed between the first and second rim portions. For rolling bearings having a plurality of synthetic resin-made cage segments arranged in a ring shape along the circumferential direction. Each of the cage segments is provided with a projection protruding in the circumferential direction from the second rim portion at the end of the first rim portion of each cage segment. The first retainer segment is overlapped with the end of the other retainer segment to form a first rim portion at the end of the other retainer segment, and the protrusion of the one retainer segment and the other retainer The column at the end of the segment An end surface of the first rim portion of the one retainer segment is formed by fitting and connecting an axially extending pin formed in one of the first portion and the pillar portion and an axially extending hole formed in either one of the two retainer segments. And the end face of the first rim portion of the other cage segment are abutted against each other in a state in which the relative movement in the radial direction is restricted.

このような構成の転がり軸受用の分割保持器によれば、隣合う一方の保持器セグメントの第１リム部における突出部と、他方の保持器セグメントの端部の柱部とを、軸方向に延びるピン及び孔とを嵌合させることにより連結しているので、各保持器セグメントの周方向の連結強度を確保することができる。
また、隣合う一方の保持器セグメントにおける突出部の端面と、他方の保持器セグメントにおける第１リム部の端面とを、径方向への相対移動を規制した状態で突き合わせているので、前記一方の保持器セグメントと他方の保持器セグメントとが、前記ピンを中心として径方向へ相対的に回動するのを規制することができる。このため、各保持器セグメントの径方向の連結強度を確保することができる。 According to the split cage for a rolling bearing having such a configuration, the protruding portion in the first rim portion of one adjacent cage segment and the column portion at the end of the other cage segment are arranged in the axial direction. Since the extended pins and the holes are connected by fitting, the connection strength in the circumferential direction of each cage segment can be ensured.
Further, since the end surface of the protruding portion in one adjacent cage segment and the end surface of the first rim portion in the other cage segment are butted in a state in which relative movement in the radial direction is restricted, The cage segment and the other cage segment can be prevented from relatively rotating in the radial direction around the pin. For this reason, the connection strength of the radial direction of each holder | retainer segment is securable.

前記分割保持器は、一方の保持器セグメントの第１リム部の端面と、他方の保持器セグメントの第１リム部の端面の何れか一方に形成された凸部と、何れか他方に形成された凹部とを嵌合させることにより径方向への相対移動を規制していてもよい。
この場合、前記一方の保持器セグメントと他方の保持器セグメントとが、前記ピンを中心として径方向へ相対的に回動するのをより効果的に規制することができる。 The split cage is formed on any one of the end surface of the first rim portion of one cage segment, the convex portion formed on one of the end surfaces of the first rim portion of the other cage segment, and the other. The relative movement in the radial direction may be restricted by fitting the recessed portion.
In this case, it is possible to more effectively restrict the one cage segment and the other cage segment from relatively rotating in the radial direction around the pin.

前記分割保持器において、前記凸部が、頂部の稜線が保持器の軸方向に延びる三角柱形状であり、前記凹部が、前記凸部に合致する断面三角形の切欠きであってもよい。
この場合、隣合う保持器セグメントの凸部と凹部とを、適正位置に容易に突き合わせることができる。 In the split cage, the convex portion may have a triangular prism shape in which a ridge line at the top extends in the axial direction of the cage, and the concave portion may be a notch having a triangular cross section that matches the convex portion.
In this case, the convex part and the concave part of the adjacent cage segment can be easily butted to an appropriate position.

前記分割保持器は、前記一方の保持器セグメントの第１リム部の端面と、他方の保持器セグメントの第１リム部の端面とを、面接触させることにより径方向への相対移動を規制していてもよい。
この場合、前記一方の保持器セグメントと他方の保持器セグメントとが、前記ピンを中心として径方向へ相対的に回動しようとしても、前記面接触した端面どうしが干渉するので、両保持器セグメントが前記ピンを中心として径方向へ相対的に回動するのを規制することができる。 The split cage regulates relative movement in the radial direction by bringing the end surface of the first rim portion of the one cage segment into contact with the end surface of the first rim portion of the other cage segment. It may be.
In this case, even if the one cage segment and the other cage segment try to rotate relative to each other in the radial direction around the pin, the end surfaces in contact with each other interfere with each other. Can be controlled to relatively rotate in the radial direction around the pin.

この発明の転がり軸受用の分割保持器によれば、各保持器セグメントの周方向及び径方向の連結強度を効果的に確保することができるので、保持器セグメントどうしの連結が外れて転動体とともに内輪から脱落するのを防止することができる。このため、転がり軸受を容易且つ効率的に組み立てることができる。   According to the divided cage for a rolling bearing of the present invention, since the connection strength in the circumferential direction and the radial direction of each cage segment can be effectively ensured, the cage segments are disconnected from each other together with the rolling elements. It is possible to prevent the inner ring from falling off. For this reason, a rolling bearing can be assembled easily and efficiently.

この発明の一実施形態に係る転がり軸受用の分割保持器を示す概略図である。It is the schematic which shows the division holder for rolling bearings concerning one Embodiment of this invention. 保持器セグメントを示す斜視図である。It is a perspective view which shows a holder | retainer segment. 複数の保持器セグメントを連結した状態を示す斜視図である。It is a perspective view which shows the state which connected the several holder | retainer segment. 他の実施形態を示す要部斜視図である。It is a principal part perspective view which shows other embodiment. 凹部と凸部を示す要部分解斜視図である。It is a principal part disassembled perspective view which shows a recessed part and a convex part. 従来の保持器セグメントの一例を示す斜視図である。It is a perspective view which shows an example of the conventional holder | retainer segment. 従来の保持器セグメントを用いた円すいころ軸受を示す要部断面図である。It is principal part sectional drawing which shows the tapered roller bearing using the conventional cage | basket segment.

以下、この発明の実施形態について添付図面を参照しながら詳述する。
図１は、この発明の一実施形態に係る転がり軸受用の分割保持器１を示す概略図であり、図２は分割保持器１を構成する保持器セグメント２を示す斜視図である。
分割保持器１は風力発電装置の主軸を支持する転がり軸受に用いられる大型のものであり、複数の円弧状の保持器セグメント２を、周方向に沿って環状に配列することによって構成されている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic view showing a split cage 1 for a rolling bearing according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a cage segment 2 constituting the split cage 1.
The split cage 1 is a large size used for a rolling bearing that supports the main shaft of the wind turbine generator, and is configured by arranging a plurality of arc-shaped cage segments 2 in a ring shape along the circumferential direction. .

前記保持器セグメント２は、所定間隔離して対向させた第１，第２リム部２１，２２と、この第１，第２リム部２１，２２の相互間に架設した複数の柱部２３とを備えており、隣合う２つの柱部２３の相互間の空間を、転動体を収容するポケット２４として構成している。この分割保持器１は、射出成形によって一体成形された合成樹脂製のものである。   The cage segment 2 includes first and second rim portions 21 and 22 that face each other at a predetermined interval, and a plurality of column portions 23 that are laid between the first and second rim portions 21 and 22. The space between two adjacent pillars 23 is configured as a pocket 24 that accommodates rolling elements. The split cage 1 is made of a synthetic resin that is integrally molded by injection molding.

前記柱部２３は、保持器セグメント２の一端側（図２において左端側）２０ａから他端側２０ｂに向かって、第１柱部２３ａ、第２柱部２３ｂ、第３柱部２３ｃ及び第４柱部２３ｄの４本がこの順に等間隔で設けられている。なお、第１柱部２３ａの軸方向の一端は自由端となっており、この自由端は、後述するが、前記保持器セグメント２の第２リム部２２と、この保持器セグメント２に隣接する保持器セグメント２の第１リム部２１との間に架設される。   The column portion 23 has a first column portion 23a, a second column portion 23b, a third column portion 23c, and a fourth column from the one end side (left end side in FIG. 2) 20a of the cage segment 2 toward the other end side 20b. Four columns 23d are provided at equal intervals in this order. One end of the first pillar portion 23a in the axial direction is a free end, and this free end is adjacent to the second rim portion 22 of the cage segment 2 and the cage segment 2 as described later. It is installed between the first rim portion 21 of the cage segment 2.

第１リム部２１は第２柱部２３ｂから保持器セグメント２の他端側２０ｂに至る範囲に設けられている。したがって、保持器セグメント２の一端２０ａ側のポケット２４部分は、軸方向の一方の端部が開口している。また、第１リム部２１の前記他端側２０ｂには、第２リム部２２の他端面２２ｂよりも周方向へ突出する突出部２１ｃが設けられている。
第１リム部２１の第４柱部２３ｄから突出部２１ｃの他端面２１ｂに至る長さＬ１は、各柱部２３ａ〜２３ｄの形成ピッチをＰとし、周方向の厚みをＴとすると、
Ｌ１＝２Ｐ−Ｔ
となるように設定されている。つまり、前記長さＬ１は、保持器セグメント２の他端側２０ｂに、二つのポケット２４を構成できる長さに設定されている。 The first rim portion 21 is provided in a range from the second column portion 23 b to the other end side 20 b of the cage segment 2. Accordingly, the pocket 24 portion on the one end 20a side of the cage segment 2 is open at one end in the axial direction. Further, the other end side 20 b of the first rim portion 21 is provided with a protruding portion 21 c that protrudes in the circumferential direction from the other end surface 22 b of the second rim portion 22.
The length L1 from the fourth column portion 23d of the first rim portion 21 to the other end surface 21b of the protruding portion 21c is P, and the formation pitch of the column portions 23a to 23d is P, and the thickness in the circumferential direction is T.
L1 = 2P-T
It is set to become. That is, the length L1 is set to a length that allows the two pockets 24 to be formed on the other end side 20b of the cage segment 2.

第２リム部２２は、第１柱部２３ａを始点として、第４柱部２３ｄから保持器セグメント２の他端側２０ｂに所定長さ突出する範囲に設けられている。この第２リム部２２の第４柱部２３ｄからの突出長さＬ２は、
Ｌ２＝Ｐ−Ｔ
となるように設定されている。つまり、前記突出長さＬ２は、保持器セグメント２の他端側２０ｂに、一つのポケット２４を構成できる長さに設定されている。 The second rim portion 22 is provided in a range protruding from the fourth column portion 23d to the other end side 20b of the cage segment 2 by a predetermined length starting from the first column portion 23a. The protruding length L2 of the second rim portion 22 from the fourth column portion 23d is:
L2 = PT
It is set to become. That is, the protrusion length L2 is set to a length that allows one pocket 24 to be formed on the other end side 20b of the cage segment 2.

第１柱部２３ａの先端には、軸方向に延びるピン２５が形成されている。このピン２５は円柱状のものであり、その突出長さは第１リム部２１の軸方向幅よりも短くなっている。また、保持器セグメント２の第１リム部２１の突出部２１ｃには、軸方向に延びる円形断面の孔２６が形成されている。この孔２６は隣接する保持器セグメント２のピン２５を嵌合させるものである。   A pin 25 extending in the axial direction is formed at the tip of the first column part 23a. The pin 25 has a cylindrical shape, and its protruding length is shorter than the axial width of the first rim portion 21. Further, the projecting portion 21c of the first rim portion 21 of the cage segment 2 is formed with a hole 26 having a circular cross section extending in the axial direction. This hole 26 is for fitting the pin 25 of the adjacent cage segment 2.

分割保持器１は、図３に示すように、隣合う一方の保持器セグメント２（以下「第１保持器セグメント２Ａ」ともいう）のピン２５を、他方の保持器セグメント２（以下「第２保持器セグメント２Ｂ」ともいう）の孔２６に嵌合させることにより、互いに組合わせた状態で連結されている。この嵌合はしまり嵌めであることが好ましい。この連結により、第１保持器セグメント２Ａの第１リム部２１と第２保持器セグメント２Ｂの第２リム部２２との間に、第１柱部２３ａが架設される。また、この連結状態で、第１保持器セグメント２Ａの各リム部２１，２２の端面２１ｂ，２２ｂと、第２保持器セグメント２Ｂの各リム部２１，２２の端面２１ａ，２２ａとが、それぞれ面接触させた状態で突き合わされる。つまり、第１保持器セグメント２Ａの他端側２０ｂの第１リム部２１が、第２保持器セグメント２Ｂの一端側２０ａの第１リム部２１として構成される。   As shown in FIG. 3, the split cage 1 is configured such that the pin 25 of one of the neighboring cage segments 2 (hereinafter also referred to as “first cage segment 2 </ b> A”) is connected to the other cage segment 2 (hereinafter “second cage segment”). By fitting into the holes 26 of the cage segments 2B), they are connected in a combined state. This fitting is preferably an interference fit. By this connection, the first pillar portion 23a is constructed between the first rim portion 21 of the first cage segment 2A and the second rim portion 22 of the second cage segment 2B. In this connected state, the end surfaces 21b and 22b of the rim portions 21 and 22 of the first cage segment 2A and the end surfaces 21a and 22a of the rim portions 21 and 22 of the second cage segment 2B are respectively surfaces. Butted in contact. That is, the first rim portion 21 on the other end side 20b of the first cage segment 2A is configured as the first rim portion 21 on the one end side 20a of the second cage segment 2B.

このように、第１保持器セグメント２Ａの他端側２０ｂの第１リム部２１で、第２保持器セグメント２Ｂの一端側２０ａの第１リム部２１を構成するので、保持器セグメント２の軸方向幅を増やすことなく、当該保持器セグメント２どうしを連結することができる。したがって、隣合う保持器セグメント２の端部どうしを重ね合わせているにもかかわらず、分割保持器１が大型化するのを防止することができる。   Thus, the first rim portion 21 on the other end side 20b of the first retainer segment 2A constitutes the first rim portion 21 on the one end side 20a of the second retainer segment 2B. The cage segments 2 can be connected to each other without increasing the direction width. Therefore, it is possible to prevent the split cage 1 from being enlarged even though the ends of the adjacent cage segments 2 are overlapped with each other.

以上の構成の分割保持器１によれば、第１保持器セグメント２Ａの第１柱部２３ａに設けたピン２５と、第２保持器セグメント２Ｂの第１リム部２１の突出部２１ｃに設けた孔２６とを嵌合させているので、保持器セグメント２の周方向の連結強度を確保することができる。また、第１保持器セグメント２Ａの第１リム部２１の一端面２１ａと、第２保持器セグメント２Ｂの前記突出部２１ｃの他端面２１ｂとを、面接触させた状態で突き合わせているので、第１保持器セグメント２Ａと第２保持器セグメント２Ｂとが、前記ピン２５を中心として径方向へ相対的に回動しようとしても、前記第１リム部２１の一端面２１ａと前記突出部２１ｃの他端面２１ｂとが干渉するので、当該相対回転を規制することができる。このため、各保持器セグメント２の径方向の連結強度を確保することができるので、転がり軸受の組み立て時に、連結した保持器セグメント２どうしが径方向に拡がって、その連結が外れ、転動体とともに内輪から脱落するのを防止することができる。この結果、転がり軸受を容易且つ効率的に組み立てることができる。   According to the divided cage 1 having the above configuration, the pin 25 provided on the first pillar portion 23a of the first cage segment 2A and the protrusion 21c of the first rim portion 21 of the second cage segment 2B are provided. Since the hole 26 is fitted, the connection strength in the circumferential direction of the cage segment 2 can be ensured. Further, since the one end surface 21a of the first rim portion 21 of the first cage segment 2A and the other end surface 21b of the protruding portion 21c of the second cage segment 2B are brought into face contact with each other, Even if the first cage segment 2A and the second cage segment 2B try to rotate relative to each other in the radial direction around the pin 25, the one end face 21a of the first rim portion 21 and the protruding portion 21c Since the end surface 21b interferes, the relative rotation can be restricted. For this reason, since the connection strength in the radial direction of each cage segment 2 can be ensured, when assembling the rolling bearing, the cage segments 2 that are connected expand in the radial direction, the connection is disengaged, and together with the rolling elements It is possible to prevent the inner ring from falling off. As a result, the rolling bearing can be assembled easily and efficiently.

図４は分割保持器１の他の実施の形態を示す要部斜視図である。この実施形態に係る分割保持器１が、図２示す保持器セグメント２を用いた分割保持器１と異なる点は、第１保持器セグメント２Ａの第１リム部２１における突出部２１ｃの他端面２１ｂに凸部２１ｄを形成し、第２保持器セグメント２Ｂの第１リム部の一端面２１ａに凹部２１ｅを形成して、これら凸部２１ｄと凹部２１ｅとを嵌合させている点である。   FIG. 4 is a perspective view of a principal part showing another embodiment of the split cage 1. The split cage 1 according to this embodiment is different from the split cage 1 using the cage segment 2 shown in FIG. 2 in that the other end face 21b of the protruding portion 21c in the first rim portion 21 of the first cage segment 2A. The convex portion 21d is formed on the one end surface 21a of the first rim portion of the second cage segment 2B, and the concave portion 21e is fitted to the concave portion 21e.

前記凸部２１ｄは、基端部から先端に向かって径方向幅が漸次減少する三角柱形状のものであり、その頂部の稜線２１ｄ１が分割保持器１の軸方向に沿って延びている（図５参照）。凸部２１ｄの断面形状は二等辺三角形であり、その頂角は、例えば９０〜１２０度に設定されている。また、突起３１の基端部の径方向幅は、第１リム部２１の径方向幅と同一である。
凹部２１ｅは周方向に凹入しており、その断面形状が前記凸部２１ｄと合致する二等辺三角形に形成されている。 The convex portion 21d has a triangular prism shape in which the radial width gradually decreases from the proximal end portion toward the distal end, and the ridge line 21d1 at the top portion extends along the axial direction of the split cage 1 (FIG. 5). reference). The cross-sectional shape of the convex portion 21d is an isosceles triangle, and its apex angle is set to 90 to 120 degrees, for example. Further, the radial width of the base end portion of the protrusion 31 is the same as the radial width of the first rim portion 21.
The recess 21e is recessed in the circumferential direction, and its cross-sectional shape is formed in an isosceles triangle that matches the protrusion 21d.

この実施形態においては、凸部２１ｄと凹部２１ｅとを嵌合させているので、第１保持器セグメント２Ａと第２保持器セグメント２Ｂとが、前記ピン２５を中心として径方向へ相対的に回動するのをより確実に規制することができる。このため、各保持器セグメント２どうしの周方向の連結強度をより高めることができる。
また、凸部２１ｄの断面形状が二等辺三角形であり、凹部２１ｅの断面形状が凸部２１ｄと合致する二等辺三角形であるので、これら凸部２１ｄと凹部２１ｅとを、径方向に位置ずれさせることなく適正位置に容易に突き合わせることができる。 In this embodiment, since the convex portion 21d and the concave portion 21e are fitted, the first cage segment 2A and the second cage segment 2B rotate relatively in the radial direction around the pin 25. The movement can be more reliably regulated. For this reason, the connection strength of the circumferential direction of each holder | retainer segment 2 can be raised more.
Moreover, since the cross-sectional shape of the convex portion 21d is an isosceles triangle and the cross-sectional shape of the concave portion 21e is an isosceles triangle that matches the convex portion 21d, the convex portion 21d and the concave portion 21e are displaced in the radial direction. It can be easily matched to an appropriate position without any problems.

この発明に係る分割保持器１は、前記した実施形態に限定されるものではない。例えば、各保持器セグメント２において、孔２６を第１柱部２３ａに設け、ピン２５を第１リム部２１に設けてもよい。また、図４に示す保持器セグメント２において、第１リム部２１の一端面２１ａに凸部２１ｄを設け、第１リム部２１の突出部２１ｃの他端面２１ｂに凹部２１ｅを設けてもよい。   The divided cage 1 according to the present invention is not limited to the above-described embodiment. For example, in each cage segment 2, the hole 26 may be provided in the first pillar portion 23 a and the pin 25 may be provided in the first rim portion 21. Further, in the cage segment 2 shown in FIG. 4, a convex portion 21 d may be provided on one end surface 21 a of the first rim portion 21, and a concave portion 21 e may be provided on the other end surface 21 b of the protruding portion 21 c of the first rim portion 21.

１：分割保持器、２：保持器セグメント、２１：第１リム部、２１ｃ：突出部、２１ｄ：凸部、２１ｅ：凹部、２２：第２リム部、２３：柱部、２４：ポケット、２５：ピン２５、２６：孔   1: split cage, 2: cage segment, 21: first rim portion, 21c: protruding portion, 21d: convex portion, 21e: concave portion, 22: second rim portion, 23: pillar portion, 24: pocket, 25 : Pin 25, 26: Hole

Claims (4)

所定間隔離して対向させた第１，第２リム部と、この第１，第２リム部の間に架設した複数の柱部とを有し、隣合う柱部の相互間を、転動体を収容するポケットとして構成している複数の合成樹脂製の保持器セグメントを、周方向に沿って環状に配列した転がり軸受用の分割保持器であって、
各保持器セグメントの第１リム部の端部に、第２リム部よりも周方向に突出する突出部を設け、
隣合う一方の保持器セグメントの前記突出部を、他方の保持器セグメントの端部にオーバーラップさせて、当該他方の保持器セグメントの端部における第１リム部として構成しているとともに、
前記一方の保持器セグメントの突出部と他方の保持器セグメントの端部の柱部とを、当該突出部及び柱部の何れか一方に形成した軸方向に延びるピンと、何れか他方に形成した軸方向に延びる孔とを嵌合させて連結し、
前記一方の保持器セグメントの第１リム部の端面と、他方の保持器セグメントの第１リム部の端面とを、径方向への相対移動を規制した状態で突き合わせていることを特徴とする転がり軸受用の分割保持器。 The first and second rim portions separated from each other by a predetermined distance and a plurality of pillar portions erected between the first and second rim portions, and the rolling elements are disposed between the adjacent pillar portions. Divided cages for rolling bearings in which a plurality of cage segments made of synthetic resin configured as pockets to be accommodated are arranged annularly along the circumferential direction,
Provided at the end of the first rim portion of each cage segment is a protruding portion that protrudes in the circumferential direction from the second rim portion,
The protruding portion of one of the adjacent cage segments overlaps with the end of the other cage segment, and is configured as a first rim portion at the end of the other cage segment,
The protruding portion of the one cage segment and the column portion at the end of the other cage segment, the pin extending in the axial direction formed on one of the protruding portion and the column portion, and the shaft formed on either side Fitting and connecting holes extending in the direction,
Rolling characterized in that the end surface of the first rim portion of the one retainer segment and the end surface of the first rim portion of the other retainer segment are abutted against each other in a state in which relative movement in the radial direction is restricted. Split cage for bearings. 前記一方の保持器セグメントの第１リム部の端面と、他方の保持器セグメントの第１リム部の端面の何れか一方に形成された凸部と、何れか他方に形成された凹部とを嵌合させることにより径方向への相対移動を規制している請求項１記載の転がり軸受用の分割保持器。   Fit the end surface of the first rim portion of the one cage segment, the convex portion formed on one of the end surfaces of the first rim portion of the other cage segment, and the concave portion formed on either one of the cage segments. The split cage for a rolling bearing according to claim 1, wherein relative movement in the radial direction is restricted by combining them. 前記凸部が、頂部の稜線が保持器の軸方向に延びる三角柱形状であり、前記凹部が、前記凸部に合致する断面三角形の切欠きである請求項２記載の転がり軸受用の分割保持器。   The split cage for a rolling bearing according to claim 2, wherein the convex portion has a triangular prism shape in which a ridge line at a top portion extends in the axial direction of the cage, and the concave portion is a notch having a triangular section that matches the convex portion. . 前記一方の保持器セグメントの第１リム部の端面と、他方の保持器セグメントの第１リム部の端面とを、面接触させることにより径方向への相対移動を規制している請求項１記載の転がり軸受用の分割保持器。   2. The relative movement in the radial direction is restricted by bringing the end surface of the first rim portion of the one retainer segment into contact with the end surface of the first rim portion of the other retainer segment. Split cage for rolling bearings.
JP2012117937A 2012-05-23 2012-05-23 Split cage for rolling bearing Pending JP2013245706A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50112643A (en) * 1974-02-18 1975-09-04
JP2003013964A (en) * 2001-06-27 2003-01-15 Ntn Corp Super-thin-walled rolling bearing and its retainer
JP2007224953A (en) * 2006-02-21 2007-09-06 Nsk Ltd Split-type rolling bearing
JP2007239948A (en) * 2006-03-10 2007-09-20 Ntn Corp Roller bearing, retainer segment, spacer, and main spindle support structure for wind power generator
JP2008185167A (en) * 2007-01-31 2008-08-14 Ntn Corp Roller bearing, retainer segment, and main shaft supporting structure for wind power generator
JP2009537003A (en) * 2006-05-17 2009-10-22 シエフレル・コマンデイトゲゼルシヤフト Cage segment for cage of rolling bearing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50112643A (en) * 1974-02-18 1975-09-04
JP2003013964A (en) * 2001-06-27 2003-01-15 Ntn Corp Super-thin-walled rolling bearing and its retainer
JP2007224953A (en) * 2006-02-21 2007-09-06 Nsk Ltd Split-type rolling bearing
JP2007239948A (en) * 2006-03-10 2007-09-20 Ntn Corp Roller bearing, retainer segment, spacer, and main spindle support structure for wind power generator
JP2009537003A (en) * 2006-05-17 2009-10-22 シエフレル・コマンデイトゲゼルシヤフト Cage segment for cage of rolling bearing
JP2008185167A (en) * 2007-01-31 2008-08-14 Ntn Corp Roller bearing, retainer segment, and main shaft supporting structure for wind power generator

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