JP7009821B2 - Rolling bearings and cages - Google Patents

Rolling bearings and cages Download PDF

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Publication number
JP7009821B2
JP7009821B2 JP2017150922A JP2017150922A JP7009821B2 JP 7009821 B2 JP7009821 B2 JP 7009821B2 JP 2017150922 A JP2017150922 A JP 2017150922A JP 2017150922 A JP2017150922 A JP 2017150922A JP 7009821 B2 JP7009821 B2 JP 7009821B2
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Prior art keywords
cage
annular body
pillar
axial direction
claw
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JP2019027572A (en
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昂佑 室
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JTEKT Corp
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JTEKT Corp
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Priority to JP2017150922A priority Critical patent/JP7009821B2/en
Priority to TW107124188A priority patent/TWI726224B/en
Priority to KR1020207002711A priority patent/KR102393018B1/en
Priority to PCT/JP2018/028567 priority patent/WO2019026875A1/en
Priority to CN201880050178.3A priority patent/CN110998112B/en
Priority to DE112018003967.6T priority patent/DE112018003967T5/en
Publication of JP2019027572A publication Critical patent/JP2019027572A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4641—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together
    • F16C33/4647—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together made from metal, e.g. two cast parts joined by rivets
    • 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
    • F16C33/48—Cages for rollers or needles for multiple rows of 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
    • F16C19/24—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 radial load mainly
    • F16C19/28—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 radial load mainly with two or more rows of 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
    • F16C19/44—Needle bearings
    • F16C19/48—Needle bearings with two or more rows of 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/70—Positive connections with complementary interlocking parts
    • F16C2226/72—Positive connections with complementary interlocking parts with bayonet joints, i.e. parts are rotated to create positive interlock
    • 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
    • F16C33/4641—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together
    • F16C33/4652—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together made from plastic, e.g. two injection moulded parts joined by a snap fit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4682—Details of individual pockets, e.g. shape or roller retaining means of the end walls, e.g. interaction with the end faces 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
    • 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

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

Description

本発明は、転がり軸受、及び転がり軸受の転動体を保持する保持器に関する。 The present invention relates to a rolling bearing and a cage for holding a rolling element of the rolling bearing.

転がり軸受は、軸を支持するために様々な分野で広く用いられており、一般的に、内輪、外輪、これら内輪と外輪との間に設けられている複数の転動体、及びこれら転動体を保持する環状の保持器を備えている。 Rolling bearings are widely used in various fields to support shafts, and generally include inner rings, outer rings, a plurality of rolling elements provided between these inner and outer rings, and these rolling elements. It is equipped with an annular cage for holding.

このような転がり軸受が備えている保持器として、例えば黄銅製であって、図８に示すように、リベット９１により組み立てられるものがある（例えば、特許文献１参照）。図８は、このような保持器９９の一部を示す斜視図である。この保持器９９は、円環状である第一環状体９８及びこの第一環状体９８から軸方向に延在している複数の柱９７を有する保持器本体９６と、複数の柱９７の軸方向一方側に設けられている円環状の第二環状体９５とを備えている。第一環状体９８と第二環状体９５との間であって周方向で隣り合う柱９７，９７の間の空間９４が、図示していない転動体を保持するポケットとなる。 As a cage provided in such a rolling bearing, for example, there is one made of brass and assembled by a rivet 91 as shown in FIG. 8 (see, for example, Patent Document 1). FIG. 8 is a perspective view showing a part of such a cage 99. The cage 99 includes a first annular body 98 which is an annular shape, a cage main body 96 having a plurality of columns 97 extending axially from the first annular body 98, and the plurality of columns 97 in the axial direction. It is provided with an annular second annular body 95 provided on one side. The space 94 between the columns 97 and 97 adjacent to each other in the circumferential direction between the first annular body 98 and the second annular body 95 serves as a pocket for holding a rolling element (not shown).

保持器本体９６において、全ての柱９７、及び第一環状体９８のうち柱９７が繋がる部分９８ａには、リベット９１の軸部９１ｂを挿通させる軸方向に長い第一孔９３が形成されている。また、第二環状体９５において、柱９７と同じ周方向ピッチで軸方向に貫通する第二孔９２が形成されている。これら第一孔９３及び第二孔９２に対してリベット９１の軸部９１ｂを挿通し、リベット端部９１ａをかしめることで、保持器本体９６と第二環状体９５とが一体とされる。 In the cage main body 96, a first hole 93 that is long in the axial direction through which the shaft portion 91b of the rivet 91 is inserted is formed in the portion 98a of all the pillars 97 and the first annular body 98 to which the pillars 97 are connected. .. Further, in the second annular body 95, a second hole 92 that penetrates in the axial direction at the same circumferential pitch as the pillar 97 is formed. By inserting the shaft portion 91b of the rivet 91 into the first hole 93 and the second hole 92 and crimping the rivet end portion 91a, the cage main body 96 and the second annular body 95 are integrated.

特開２００１－３２３９３４号公報Japanese Unexamined Patent Publication No. 2001-323934

リベット９１の軸部９１ｂの直径は、例えば２ミリメートル程度であり、保持器本体９６に形成されている第一孔９３の直径、及び第二環状体９５に形成されている第二孔９２の直径は、軸部９１ｂの直径よりも僅かに大きい。保持器本体９６に第一孔９３を形成するためには、柱９７及び第一環状体９８に対して工具を軸方向に貫通させる必要があるが、形成する第一孔９３は直径が小さく軸方向に長いことから、その加工が難しく、工具が細くて折れる場合がある。しかも、このような孔加工を、全ての柱９７に対して行う必要があり、保持器９９の製造は困難であるという問題点がある。また、前記のような孔加工を終えても、柱９７と同数のリベット９１を一つずつハンマー等を用いてかしめる作業が必要であり、組み立てに手間を要するという問題点がある。 The diameter of the shaft portion 91b of the rivet 91 is, for example, about 2 mm, and the diameter of the first hole 93 formed in the cage body 96 and the diameter of the second hole 92 formed in the second annular body 95. Is slightly larger than the diameter of the shaft portion 91b. In order to form the first hole 93 in the cage main body 96, it is necessary to allow the tool to penetrate the column 97 and the first annular body 98 in the axial direction, but the first hole 93 to be formed has a small diameter and a shaft. Since it is long in the direction, it is difficult to process it, and the tool may be thin and break. Moreover, it is necessary to perform such hole processing for all the pillars 97, and there is a problem that it is difficult to manufacture the cage 99. Further, even after the hole processing as described above is completed, it is necessary to crimp the same number of rivets 91 as the pillar 97 one by one by using a hammer or the like, which causes a problem that it takes time and effort to assemble.

保持器９９は（型番によって異なるが）例えば１２～２０本程度の柱９７を備えており、柱９７の数が多くなるほど、その製造（孔加工）や組み立て作業に多くの工数を要するという問題点がある。
そこで、本発明は、保持器本体と第二環状体とを連結するための孔加工や連結作業の手間が削減され、製造及び組み立て工数を低減することが可能となる保持器、及びこのような保持器を備えている転がり軸受を提供することを目的とする。 The cage 99 is provided with, for example, about 12 to 20 pillars 97 (depending on the model number), and the larger the number of pillars 97, the more man-hours are required for manufacturing (hole processing) and assembling. There is.
Therefore, the present invention is a cage that can reduce the labor of drilling and connecting work for connecting the cage main body and the second annular body, and can reduce the man-hours for manufacturing and assembling, and such a cage. It is an object of the present invention to provide a rolling bearing equipped with a cage.

本発明は、第一環状体及び当該第一環状体から軸方向一方側に延在している複数の柱を有する保持器本体と、複数の前記柱の軸方向一方側に設けられている第二環状体と、前記柱の数よりも少なく前記保持器本体と前記第二環状体とを軸方向に貫通して連結するための軸部材と、を備え、前記第一環状体と前記第二環状体との間であって周方向で隣り合う前記柱の間の空間が転動体を保持するポケットとなる保持器であって、前記複数の柱には、前記軸部材を挿通させる貫通孔が形成されている第一柱と、軸方向一方側の端部に爪を有する第二柱と、が含まれ、前記第二環状体のうち前記第二柱と連結される部分に、前記爪を収容する凹部が形成されており、当該凹部に前記爪と係合する突起が設けられている。 The present invention includes a first annular body, a cage main body having a plurality of columns extending from the first annular body on one side in the axial direction, and a plurality of columns provided on one side in the axial direction. The bicyclic body is provided with a shaft member for axially penetrating and connecting the cage main body and the second annular body, which is smaller than the number of the pillars, and the first annular body and the second annular body are provided. A cage in which the space between the pillars adjacent to each other in the circumferential direction is a pocket for holding the rolling element, and the plurality of pillars have through holes through which the shaft member is inserted. A first pillar formed and a second pillar having a claw at one end in the axial direction are included, and the claw is placed in a portion of the second annular body connected to the second pillar. A recess for accommodating is formed, and the recess is provided with a protrusion that engages with the claw.

この保持器によれば、複数の柱には、軸部材が貫通することで第二環状体と連結される第一柱と、爪と突起との係合によって第二環状体と連結される第二柱とが含まれる構成となる。つまり、保持器本体と第二環状体とを連結するために、全ての柱に対して軸部材を挿通させる必要がなく、複数の柱のうちの一部である第一柱において軸部材を挿通させ、別の第二柱において爪と突起とを係合させればよい。よって、全ての柱、及びこれら全ての柱に対応する第一環状体及び第二環状体それぞれの部分に、軸部材を挿通させる貫通孔を形成する必要がない。このため、軸部材によって保持器本体と第二環状体とを連結するための孔加工や軸部材による連結作業の手間が削減され、保持器の製造及び組み立て工数を低減することが可能となる。なお、前記「軸部材による連結作業」の例としては、例えば、軸部材がリベットである場合、かしめ作業である。 According to this cage, the plurality of columns are connected to the first column, which is connected to the second annular body by penetrating the shaft member, and the second annular body, which is connected to the second annular body by the engagement between the claw and the protrusion. The configuration includes two pillars. That is, in order to connect the cage body and the second annular body, it is not necessary to insert the shaft member through all the pillars, and the shaft member is inserted through the first pillar which is a part of the plurality of pillars. Then, the claw and the protrusion may be engaged with each other in another second pillar. Therefore, it is not necessary to form a through hole through which the shaft member is inserted in all the columns and the portions of the first annular body and the second annular body corresponding to all the columns. For this reason, it is possible to reduce the labor of drilling holes for connecting the cage main body and the second annular body by the shaft member and the labor of connecting work by the shaft member, and it is possible to reduce the man-hours for manufacturing and assembling the cage. In addition, as an example of the said "connecting work by a shaft member", for example, when a shaft member is a rivet, it is a caulking work.

また、前記複数の柱には、更に、軸方向一方側の端面が前記第二環状体の軸方向他方側の面に対して接触可能であって当該第二環状体と非連結状態にある第三柱が含まれているのが好ましい。この構成によれば、複数の柱には、第一柱及び第二柱の他に、第三柱が含まれ、軸部材を用いて保持器本体と第二環状体とを連結する箇所を更に減らし、保持器の製造及び組み立て工数をより一層低減することが可能となる。 Further, the plurality of pillars are in a state in which the end surface on one side in the axial direction is in contact with the surface on the other side in the axial direction of the second annular body and is not connected to the second annular body. It is preferable that three pillars are included. According to this configuration, the plurality of pillars include the third pillar in addition to the first pillar and the second pillar, and further a place where the cage main body and the second annular body are connected by using a shaft member. It is possible to reduce the number and further reduce the man-hours for manufacturing and assembling the cage.

また、前記凹部において、前記突起の周方向一方側の隣りに、前記爪を軸方向に挿入可能とするスペースが設けられているのが好ましい。この構成によれば、保持器本体と第二環状体とを組み合わせる際、第二環状体の凹部に設けられている前記スペースに対して、保持器本体の第二柱の爪を、軸方向から挿入させ、その後、保持器本体に対して第二環状体を周方向一方側に回転させると、爪を突起に係合させることが可能となる構成が得られる。そして、爪と突起とが係合した状態で、第一柱を貫通する軸部材によって保持器本体と第二環状体とを連結すれば、保持器本体と第二環状体とは周方向に回転不能となり、爪と突起との係合が解けない。よって、前記構成によれば、爪と突起との係合による保持器の組み立てが容易となり、しかも、組み立てが完了すると、爪と突起との係合によって保持器本体と第二環状体とは機構的に結合され、保持器の剛性が高まる。 Further, in the recess, it is preferable that a space is provided next to one side of the protrusion in the circumferential direction so that the claw can be inserted in the axial direction. According to this configuration, when the cage main body and the second annular body are combined, the claws of the second pillar of the cage main body are axially inserted into the space provided in the recess of the second annular body. When the second annular body is inserted and then rotated to one side in the circumferential direction with respect to the cage body, a configuration is obtained in which the claw can be engaged with the protrusion. Then, if the cage body and the second annular body are connected by a shaft member penetrating the first pillar with the claws and the protrusions engaged, the cage body and the second annular body rotate in the circumferential direction. It becomes impossible and the engagement between the claw and the protrusion cannot be disengaged. Therefore, according to the above configuration, the cage can be easily assembled by engaging the claws with the protrusions, and when the assembly is completed, the cage main body and the second annular body are mechanically assembled by the engagement between the claws and the protrusions. The rigidity of the cage is increased.

また、前記凹部は、径方向外側又は内側、及び、軸方向他方側に向かって開口しており、前記突起は、軸方向一方側に向く第一面と、径方向に向く第二面と、軸方向他方側に向く第三面と、を有し、前記爪は、前記第一面に対向する第四面と、前記第二面に対向する第五面と、を有し、前記第二柱の軸方向一方側の端面が、前記第三面に対向すると共に、当該端面から前記爪が突出しているのが好ましい。この構成によれば、突起が有する各面に対して爪が有する各面が対向することで、突起と爪とが係合し、保持器本体と第二環状体とが軸方向について分離不能となる。 Further, the recess is open outward or inside in the radial direction and toward the other side in the axial direction, and the protrusion has a first surface facing one side in the axial direction and a second surface facing in the radial direction. The claw has a third surface facing the other side in the axial direction, and the claw has a fourth surface facing the first surface and a fifth surface facing the second surface. It is preferable that the end face on one side in the axial direction of the pillar faces the third surface and the claws protrude from the end face. According to this configuration, when each surface of the claw faces each surface of the protrusion, the protrusion and the claw engage with each other, and the cage body and the second annular body cannot be separated in the axial direction. Become.

本発明の転がり軸受は、内輪と、外輪と、前記内輪と前記外輪との間に設けられている複数の転動体と、前記複数の転動体を保持する環状の保持器と、を備え、前記保持器が、前記の各構成を備えている。
この転がり軸受によれば、保持器の製造及び組み立てにおいて、軸部材によって保持器本体と第二環状体とを連結するための孔加工や軸部材による連結作業の手間が削減され、工数を低減することが可能となる。 The rolling bearing of the present invention includes an inner ring, an outer ring, a plurality of rolling elements provided between the inner ring and the outer ring, and an annular cage for holding the plurality of rolling elements. The cage comprises each of the above configurations.
According to this rolling bearing, in the manufacturing and assembling of the cage, the man-hours for drilling holes for connecting the cage main body and the second annular body by the shaft member and the connecting work by the shaft member are reduced, and the man-hours are reduced. Is possible.

本発明によれば、保持器の製造及び組み立てにおいて、軸部材によって保持器本体と第二環状体とを連結するための孔加工や軸部材による連結作業の手間が削減され、工数を低減することが可能となる。この結果、保持器のコスト低下（転がり軸受のコスト低下）に貢献することができる。 According to the present invention, in the manufacture and assembly of a cage, the man-hours for drilling holes for connecting the cage main body and the second annular body by the shaft member and the connecting work by the shaft member are reduced, and the man-hours are reduced. Is possible. As a result, it is possible to contribute to the cost reduction of the cage (the cost reduction of the rolling bearing).

転がり軸受の断面図である。It is sectional drawing of the rolling bearing. 環状である保持器を平面的に展開した状態の図であり、径方向外側から見た場合の図である。It is the figure in the state which expanded the cage which is an annular shape in a plane, and is the figure when it is seen from the outside in the radial direction. 保持器本体を軸方向一方側から見た図である。It is the figure which looked at the cage body from one side in the axial direction. 第二柱及び第二環状体の一部を示す斜視図である。It is a perspective view which shows a part of a 2nd pillar and a 2nd ring body. 保持器の一部を周方向に沿って見た断面図であり、（Ａ）は爪と突起とが係合する前の状態（非係合状態）を示し、（Ｂ）は爪と突起とが係合した状態を示している。It is a cross-sectional view of a part of the cage seen along the circumferential direction, (A) shows the state before the claw and the protrusion are engaged (non-engaged state), and (B) is the state before the claw and the protrusion are engaged. Shows the engaged state. 保持器の一部を軸方向一方側から見た図である。It is the figure which saw a part of the cage from one side in the axial direction. 第二柱の爪、及び第二環状体の凹部の突起の変形例を示す図である。It is a figure which shows the deformation example of the claw of the second pillar, and the protrusion of the recess of the second annular body. 従来の保持器の一部を示す斜視図である。It is a perspective view which shows a part of the conventional cage.

図１は転がり軸受の断面図である。この転がり軸受１０は、内輪１１と、外輪１２と、これら内輪１１と外輪１２との間に設けられている複数の転動体と、これら複数の転動体を保持する環状の保持器１４とを備えている。本実施形態の転動体は円筒ころ１３であり、転がり軸受１０は円筒ころ軸受である。 FIG. 1 is a cross-sectional view of a rolling bearing. The rolling bearing 10 includes an inner ring 11, an outer ring 12, a plurality of rolling elements provided between the inner ring 11 and the outer ring 12, and an annular cage 14 for holding the plurality of rolling elements. ing. The rolling element of this embodiment is a cylindrical roller 13, and the rolling bearing 10 is a cylindrical roller bearing.

本実施形態の内輪１１は、円筒状の内輪本体１５と、環状の鍔輪１６とを有しており、内輪本体１５の軸方向一方側に鍔輪１６を並べた状態とし、これらを組み合わせることで内輪１１が構成される。内輪本体１５の外周側に円筒ころ１３が転がり接触する内輪軌道面１７が形成されており、内輪本体１５の軸方向他方側に径方向外方へ突出している内鍔部１８が設けられている。本実施形態の外輪１２は、円筒状であり、内周側に円筒ころ１３が転がり接触する外輪軌道面１９が形成されている。外輪１２の軸方向一方側及び他方側に径方向内方へ突出している外鍔部１９ａ，１９ｂが設けられている。本実施形態では、円筒ころ１３が軸方向に二列並んで設けられている。二列の円筒ころ１３が、一つの保持器１４によって保持されている。内輪１１、外輪１２、及び円筒ころ１３は、例えば軸受鋼製である。図１に示す転がり軸受１０は、鉄鋼圧延機におけるワークロールスラスト用の軸受として用いられる。 The inner ring 11 of the present embodiment has a cylindrical inner ring main body 15 and an annular collar ring 16, and the collar rings 16 are arranged on one side of the inner ring main body 15 in the axial direction, and these are combined. The inner ring 11 is configured with. An inner ring raceway surface 17 with which the cylindrical roller 13 rolls and contacts is formed on the outer peripheral side of the inner ring main body 15, and an inner flange portion 18 protruding outward in the radial direction is provided on the other side in the axial direction of the inner ring main body 15. .. The outer ring 12 of the present embodiment has a cylindrical shape, and an outer ring raceway surface 19 with which the cylindrical rollers 13 roll and contact is formed on the inner peripheral side. Outer flange portions 19a and 19b protruding inward in the radial direction are provided on one side and the other side in the axial direction of the outer ring 12. In this embodiment, the cylindrical rollers 13 are provided side by side in two rows in the axial direction. Two rows of cylindrical rollers 13 are held by one cage 14. The inner ring 11, the outer ring 12, and the cylindrical roller 13 are made of, for example, bearing steel. The rolling bearing 10 shown in FIG. 1 is used as a bearing for work roll thrust in a steel rolling mill.

図２は、環状である保持器１４を平面的に展開した状態の図であり、径方向外側から見た場合の図である。図１及び図２に示すように、保持器１４は、二分割構造を有している。つまり、保持器１４は、第一環状体（第一環状部）２１及びこの第一環状体２１から軸方向一方側に延在している複数の柱（柱部）２２を有する保持器本体２０と、複数の柱２２の軸方向一方側に設けられている第二環状体３０とを備えている。第一環状体２１は円環状であり、この第一環状体２１の軸方向一方側から更に軸方向一方側に向けて柱２２が直線状に延びて設けられている。第二環状体３０は円環状の部材である。本実施形態の保持器本体２０及び第二環状体３０は、銅合金（黄銅）製であるが、その他の金属材料であってもよい。保持器本体２０と第二環状体３０とは、別部材により構成されており、後にも説明するがリベット２３（図２参照）及び爪３１と突起３４との係合によって連結され一体となっている。 FIG. 2 is a view showing a state in which the annular cage 14 is developed in a plane, and is a view when viewed from the outside in the radial direction. As shown in FIGS. 1 and 2, the cage 14 has a bifurcated structure. That is, the cage 14 has a cage main body 20 having a first annular body (first annular portion) 21 and a plurality of pillars (pillar portions) 22 extending on one side in the axial direction from the first annular body 21. And a second annular body 30 provided on one side in the axial direction of the plurality of pillars 22. The first annular body 21 is an annular shape, and a pillar 22 is provided so as to extend linearly from one side in the axial direction of the first annular body 21 toward one side in the axial direction. The second annular body 30 is an annular member. The cage body 20 and the second annular body 30 of the present embodiment are made of a copper alloy (brass), but may be made of other metal materials. The cage main body 20 and the second annular body 30 are composed of separate members, and as will be described later, they are connected and integrated by engaging the rivet 23 (see FIG. 2) and the claw 31 and the protrusion 34. There is.

図２において、保持器１４は、保持器本体２０と第二環状体３０とを軸方向に貫通して連結するための軸部材として前記リベット２３を備えている。リベット２３は、直線状の軸部２４と、この軸部２４の軸方向一方側に設けられている直径が拡大した頭部２５とを有している。軸部２４を、第二環状体３０に設けられている貫通孔２８及び保持器本体２０に設けられている貫通孔２７に挿通し、軸方向他方側の端部をかしめる（塑性変形させる）ことで直径が拡大したかしめ部２６が形成され、これにより、保持器本体２０と第二環状体３０とが分離不能となる。なお、リベット２３の代わりに、図示しないが、他の軸部材として細長いボルトを採用することができ、このボルトを前記貫通孔２７，２８に挿通させ、軸方向一方側のボルト頭部と、軸方向他方側においてこのボルトに螺合するナットとによって、保持器本体２０と第二環状体３０とを連結する構成としてもよい。 In FIG. 2, the cage 14 includes the rivet 23 as a shaft member for axially penetrating and connecting the cage main body 20 and the second annular body 30. The rivet 23 has a linear shaft portion 24 and a head portion 25 provided on one side of the shaft portion 24 in the axial direction and having an enlarged diameter. The shaft portion 24 is inserted into the through hole 28 provided in the second annular body 30 and the through hole 27 provided in the cage main body 20, and the end portion on the other side in the axial direction is crimped (plastically deformed). As a result, a caulked portion 26 having an enlarged diameter is formed, whereby the cage body 20 and the second annular body 30 cannot be separated. Although not shown, an elongated bolt can be used instead of the rivet 23 as another shaft member, and this bolt is inserted into the through holes 27 and 28 to form a bolt head on one side in the axial direction and a shaft. The cage main body 20 and the second annular body 30 may be connected by a nut screwed into the bolt on the other side in the direction.

保持器本体２０の第一の貫通孔２７は、第一環状体２１及び柱２２を軸方向に貫通している。後にも説明するが、本実施形態では、第一の貫通孔２７はリベット２３と同数である三箇所に設けられている（図３参照）。
第二の貫通孔２８は第二環状体３０を軸方向に貫通している。第二環状体３０において、第二の貫通孔２８は、第一の貫通孔２７と同数であって第一の貫通孔２７と周方向について同じ位置に設けられている。
これら貫通孔２７，２８はリベット２３の軸部２４の直径よりも僅かに大きな直径の孔である。リベット２３の軸部２４が貫通している柱２２を第一柱２２ａと呼ぶ。図２に示すように、保持器１４は、第一柱２２ａ以外に、第二柱２２ｂ及び第三柱２２ｃを有している。第二柱２２ｂ及び第三柱２２ｃの構成については、後で説明する。 The first through hole 27 of the cage body 20 penetrates the first annular body 21 and the pillar 22 in the axial direction. As will be described later, in the present embodiment, the first through holes 27 are provided at three locations having the same number as the rivets 23 (see FIG. 3).
The second through hole 28 penetrates the second annular body 30 in the axial direction. In the second annular body 30, the second through holes 28 are provided in the same number as the first through holes 27 and at the same positions in the circumferential direction as the first through holes 27.
These through holes 27 and 28 are holes having a diameter slightly larger than the diameter of the shaft portion 24 of the rivet 23. The pillar 22 through which the shaft portion 24 of the rivet 23 penetrates is referred to as a first pillar 22a. As shown in FIG. 2, the cage 14 has a second pillar 22b and a third pillar 22c in addition to the first pillar 22a. The configuration of the second pillar 22b and the third pillar 22c will be described later.

図３は、保持器本体２０を軸方向一方側から見た図である。本実施形態の保持器本体２０は、１５本の柱２２を有しており、このうち、貫通孔２７が形成されている第一柱２２ａは３本である。第一柱２２ａは周方向に沿って均等に（本実施形態では１２０度離れて）配置されている。そして、１５本の柱２２のうち６本が第二柱２２ｂであり、残りの６本が第三柱２２ｃである。一つの第一柱２２ａと他の第一柱２２ａとの間に、第二柱２２ｂ及び第三柱２２ｃが設けられている。本実施形態では、一つの第一柱２２ａと他の第一柱２２ａとの間に、２本の第二柱２２ｂ及び２本の第三柱２２ｃが設けられている。なお、柱２２の数は、転がり軸受１０の型番（大きさ）によって様々であり、また、第一柱２２ａ、第二柱２２ｂ、及び第三柱２２ｃのそれぞれの数及び周方向の配置は、図３に示す形態以外であってもよい。ただし、第一柱２２ａ及び第二柱２２ｂについては、それぞれを周方向に分散させる（均等に配置する）のがよく、図３に示す形態のように、複数本（２本）の第二柱２２ｂを一組として、その組を周方向に分散させてもよい（均等に配置してもよい）。 FIG. 3 is a view of the cage main body 20 as viewed from one side in the axial direction. The cage main body 20 of the present embodiment has 15 pillars 22, of which 3 are the first pillars 22a on which the through holes 27 are formed. The first pillars 22a are evenly arranged (120 degrees apart in this embodiment) along the circumferential direction. Of the 15 pillars 22, 6 are the second pillars 22b, and the remaining 6 pillars are the third pillars 22c. A second pillar 22b and a third pillar 22c are provided between one first pillar 22a and the other first pillar 22a. In the present embodiment, two second pillars 22b and two third pillars 22c are provided between one first pillar 22a and the other first pillar 22a. The number of pillars 22 varies depending on the model number (size) of the rolling bearing 10, and the numbers and arrangements of the first pillars 22a, the second pillars 22b, and the third pillars 22c in the circumferential direction are different. It may be other than the form shown in FIG. However, it is preferable that the first pillar 22a and the second pillar 22b are dispersed (evenly arranged) in the circumferential direction, and as shown in FIG. 3, a plurality of (two) second pillars are used. 22b may be set as one set, and the set may be dispersed in the circumferential direction (may be evenly arranged).

図２及び図３に示すように、第二柱２２ｂは、軸方向一方側の端部に爪３１を有している。図４は、第二柱２２ｂ及び第二環状体３０の一部を示す斜視図である。第二環状体３０のうち第二柱２２ｂと連結される部分３２に、爪３１を収容する凹部３３が形成されており、この凹部３３の一部に爪３１と係合する突起３４が設けられている。凹部３３（及び突起３４）は、第二柱２２ｂと同数であって第二柱２２ｂと周方向について同じ位置に設けられている。保持器本体２０が有する第二柱２２ｂの爪３１が、第二環状体３０の凹部３３に形成されている突起３４に係合することで、これら保持器本体２０と第二環状体３０とは連結され、軸方向について分離不能となる。 As shown in FIGS. 2 and 3, the second pillar 22b has a claw 31 at one end in the axial direction. FIG. 4 is a perspective view showing a part of the second pillar 22b and the second annular body 30. A recess 33 for accommodating the claw 31 is formed in a portion 32 of the second annular body 30 connected to the second pillar 22b, and a protrusion 34 that engages with the claw 31 is provided in a part of the recess 33. ing. The number of recesses 33 (and protrusions 34) is the same as that of the second pillar 22b, and the number of recesses 33 (and the protrusions 34) is the same as that of the second pillar 22b in the circumferential direction. The claw 31 of the second pillar 22b of the cage body 20 engages with the protrusion 34 formed in the recess 33 of the second annular body 30, so that the cage body 20 and the second annular body 30 are separated from each other. It is connected and inseparable in the axial direction.

図４に示すように、第二環状体３０において、凹部３３は、少なくとも径方向外側及び軸方向他方側に向かって開口しており、本実施形態では、更に、軸方向一方側に向かって開口している。つまり、凹部３３は、第二環状体３０をその内周側を残して軸方向に貫通している。この凹部３３の周方向の一部に突起３４が設けられている。また、本実施形態では、凹部３３において、周方向一方側に軸方向に貫通しているスペース（空間部）３５が設けられており、その周方向他方側に軸方向の障壁となる突起３４が設けられている。 As shown in FIG. 4, in the second annular body 30, the recess 33 is open at least toward the radial outer side and the other side in the axial direction, and in the present embodiment, the recess 33 is further opened toward one side in the axial direction. is doing. That is, the recess 33 penetrates the second annular body 30 in the axial direction, leaving the inner peripheral side thereof. A protrusion 34 is provided in a part of the concave portion 33 in the circumferential direction. Further, in the present embodiment, in the recess 33, a space (space portion) 35 penetrating in the axial direction is provided on one side in the circumferential direction, and a protrusion 34 serving as an axial barrier is provided on the other side in the circumferential direction. It is provided.

図５は、保持器１４の一部（第二柱２２ｂ及びその周囲）を周方向に沿って見た拡大断面図であり、（Ａ）は爪３１と突起３４とが係合する前の状態（非係合状態）を示しており、（Ｂ）は爪３１と突起３４とが係合した状態を示している。
突起３４は、直方体乃至立方体形状を備えており、軸方向一方側に向く第一面３６と、径方向外側に向く第二面３７と、軸方向他方側に向く第三面３８とを有している。
これに対して、爪３１は、第二柱２２ｂの軸方向一方側の端面４１から軸方向一方側に突出している軸方向突出部４２と、この軸方向突出部４２の軸方向一方側の先部から径方向内方側へ突出している径方向突出部４３とを有している。これにより、爪３１が突起３４に係合した状態において（図５（Ｂ）参照）、爪３１は、第一面３６に対向する第四面３９と、第二面３７に対向する第五面４０とを有する構成となる。そして、第二柱２２ｂの軸方向一方側の端面４１が、第三面３８に対向する。第四面３９は、径方向突出部４３の軸方向他方側の面であり、第五面４０は、軸方向突出部４２の径方向内側の面である。 FIG. 5 is an enlarged cross-sectional view of a part of the cage 14 (second pillar 22b and its surroundings) viewed along the circumferential direction, and FIG. 5A is a state before the claw 31 and the protrusion 34 are engaged with each other. (Non-engaged state) is shown, and (B) shows a state in which the claw 31 and the protrusion 34 are engaged.
The protrusion 34 has a rectangular parallelepiped to cubic shape, and has a first surface 36 facing one side in the axial direction, a second surface 37 facing outward in the radial direction, and a third surface 38 facing the other side in the axial direction. ing.
On the other hand, the claw 31 has an axial protrusion 42 protruding from the end surface 41 on one axial side of the second pillar 22b to one side in the axial direction, and a tip on one side in the axial direction of the protruding portion 42 in the axial direction. It has a radial protrusion 43 that protrudes inward in the radial direction from the portion. As a result, in a state where the claw 31 is engaged with the protrusion 34 (see FIG. 5B), the claw 31 has a fourth surface 39 facing the first surface 36 and a fifth surface facing the second surface 37. It is configured to have 40. Then, the end surface 41 on one side in the axial direction of the second pillar 22b faces the third surface 38. The fourth surface 39 is the surface on the other side in the axial direction of the radial protrusion 43, and the fifth surface 40 is the inner surface in the radial direction of the axial protrusion 42.

図５（Ｂ）に示すように、爪３１が突起３４に係合した状態で、第一面３６と第四面３９とが面接触可能であり、第二面３７と第五面４０とが面接触可能であり、第二柱２２ｂの軸方向一方側の端面４１と第三面３８とが面接触可能となる。第四面３９と第二柱２２ｂの端面４１との間に突起３４が介在することで、第二柱２２ｂと第二環状体３０とは軸方向に分離不能となって連結され、第五面４０と第二面３７とが接触することで、柱２２ｂと第二環状体３０との相互の径方向の位置決めがされる。 As shown in FIG. 5B, with the claw 31 engaged with the protrusion 34, the first surface 36 and the fourth surface 39 can be in surface contact with each other, and the second surface 37 and the fifth surface 40 are in contact with each other. Surface contact is possible, and surface contact is possible between the end surface 41 on one side in the axial direction of the second pillar 22b and the third surface 38. By interposing the protrusion 34 between the fourth surface 39 and the end surface 41 of the second pillar 22b, the second pillar 22b and the second annular body 30 are inseparably connected in the axial direction, and the fifth surface is connected. When the 40 and the second surface 37 come into contact with each other, the column 22b and the second annular body 30 are mutually radially positioned.

図２及び図３に示すように、第三柱２２ｃは、軸方向一方側に、第二柱２２ｂが有する爪３１が設けられておらず、また、第一柱２２ａのようにリベット２２用の貫通孔２７が形成されておらず、第三柱２２ｃの軸方向一方側の端面４４は、環状である保持器１４の中心軸Ｃ１（図３参照）に直行する平面に沿った平滑面となっている。そして、第二環状体３０の軸方向他方側の側面のうち、第三柱２２ｃの前記端面４４と対向する面４５（図２参照）も、前記中心軸Ｃ１に直行する平面に沿った平滑面となっている。保持器本体２０と第二環状体３０とが前記リベット２３及び前記爪３１と前記突起３４との係合により連結された状態で、第三柱２２ｃの軸方向一方側の前記端面４４と、第二環状体３０の軸方向他方側の前記面４５とは接触した状態であって、第三柱２２ｃと第二環状体３０とは連結されていない。第三柱２２ｃは、第一環状体２１から軸方向一方側に延びる片持梁状となっている。なお、第三柱２２ｃ及び第一環状体２１の剛性は高く、例えば円筒ころ１３が第三柱２２ｃに接触しても、その接触による力に抗することができる。 As shown in FIGS. 2 and 3, the third pillar 22c is not provided with the claw 31 of the second pillar 22b on one side in the axial direction, and is used for the rivet 22 like the first pillar 22a. The through hole 27 is not formed, and the end surface 44 on one side in the axial direction of the third pillar 22c is a smooth surface along a plane orthogonal to the central axis C1 (see FIG. 3) of the annular cage 14. ing. Of the side surfaces on the other side in the axial direction of the second annular body 30, the surface 45 (see FIG. 2) facing the end surface 44 of the third pillar 22c is also a smooth surface along a plane orthogonal to the central axis C1. It has become. In a state where the cage body 20 and the second annular body 30 are connected by the engagement of the rivet 23, the claw 31 and the protrusion 34, the end surface 44 on one side in the axial direction of the third pillar 22c and the second. The surface 45 on the other side in the axial direction of the bicyclic body 30 is in contact with the surface 45, and the third pillar 22c and the second ring body 30 are not connected to each other. The third pillar 22c has a cantilever shape extending from the first annular body 21 to one side in the axial direction. The rigidity of the third pillar 22c and the first annular body 21 is high, and even if the cylindrical roller 13 comes into contact with the third pillar 22c, the force due to the contact can be resisted.

リベット２３及び爪３１と突起３４との係合によって保持器本体２０と第二環状体３０とが連結された状態で、第一環状体２１と第二環状体３０との間であって周方向で隣り合う柱２２，２２の間の空間２９が、転動体である円筒ころ１３（図１参照）を保持するポケットとなる。 Circumferential direction between the first annular body 21 and the second annular body 30 in a state where the cage body 20 and the second annular body 30 are connected by the engagement of the rivet 23, the claw 31 and the protrusion 34. The space 29 between the adjacent columns 22 and 22 is a pocket for holding the cylindrical roller 13 (see FIG. 1) which is a rolling element.

以上のように、保持器１４では、保持器本体２０と第二環状体３０とを連結するためのリベット２３の数（全数）は、柱２２の数（全数）よりも少なく、本実施形態では、柱２２が１５本であるのに対してリベット２３は３本である。そして、これら１５本の柱２２には、リベット２３の軸部２４を挿通させる第一の貫通孔２７が形成されている第一柱２２ａと、軸方向一方側の端部に爪３１を有する第二柱２２ｂとが含まれている。更に、本実施形態では、総数が１５本である柱２２には、軸方向一方側の端面４４が第二環状体３０の軸方向他方側の面４５に対して接触可能であるが、第二環状体３０と非連結状態にある第三柱２２ｃが含まれている。 As described above, in the cage 14, the number of rivets 23 (total number) for connecting the cage main body 20 and the second annular body 30 is smaller than the number of pillars 22 (total number), and in the present embodiment, the number of rivets 23 is smaller than the number of pillars 22. , The number of pillars 22 is 15, while the number of rivets 23 is 3. The 15 pillars 22 have a first pillar 22a in which a first through hole 27 through which the shaft portion 24 of the rivet 23 is inserted is formed, and a claw 31 at one end in the axial direction. Two pillars 22b are included. Further, in the present embodiment, the pillar 22 having a total number of 15 can be contacted with the end surface 44 on one side in the axial direction with respect to the surface 45 on the other side in the axial direction of the second annular body 30. A third column 22c that is not connected to the annular body 30 is included.

このように、保持器１４が有する１５本の柱２２には、リベット２３が貫通することで第二環状体３０と連結される第一柱２２ａと、爪３１と突起３４との係合によって第二環状体３０と連結される第二柱２２ｂとが含まれている。つまり、保持器本体２０と第二環状体３０とを連結するために、１５本全ての柱２２に対してリベット２３を挿通させる必要がなく、１５本の柱２２のうちの一部である第一柱２２ａにおいてリベット２３を挿通させ、別の第二柱２２ｂにおいて爪３１と突起３４とを係合させればよい。 In this way, the 15 pillars 22 of the cage 14 are connected to the first pillar 22a, which is connected to the second annular body 30 by the rivet 23 penetrating, and the claw 31 and the protrusion 34 are engaged with each other. A second pillar 22b connected to the dicyclic body 30 is included. That is, in order to connect the cage main body 20 and the second annular body 30, it is not necessary to insert the rivet 23 through all 15 pillars 22, and it is a part of the 15 pillars 22. The rivet 23 may be inserted in one pillar 22a, and the claw 31 and the protrusion 34 may be engaged in another second pillar 22b.

よって、１５本全ての柱２２、及びこれら全ての柱２２に対応する第一環状体２１及び第二環状体３０それぞれの部分に、リベット２３を挿通させる貫通孔２７，２８を形成する必要がなく、３本の第一柱２２ａ、並びに第一環状体２１及び第二環状体３０のうち、この３本の第一柱２２ａの軸方向隣りに位置する部分にのみ、貫通孔２７，２８を形成すればよい。そして、リベット２３が用いられるのは、３本の第一柱２２ａに対応する３箇所のみである。これにより、リベット２３によって保持器本体２０と第二環状体３０とを連結するための孔加工やかしめ作業の手間が削減され、保持器１４の製造及び組み立て工数を低減することが可能となる。この結果、保持器１４のコスト低下、更には、この保持器１４を備えている転がり軸受１０のコスト低下に貢献することができる。 Therefore, it is not necessary to form through holes 27 and 28 through which the rivet 23 is inserted in each of the 15 pillars 22 and the portions of the first annular body 21 and the second annular body 30 corresponding to all the pillars 22. Through holes 27 and 28 are formed only in the portions of the three first pillars 22a and the first annular body 21 and the second annular body 30 located adjacent to each other in the axial direction of the three first pillars 22a. do it. The rivet 23 is used only at three locations corresponding to the three first pillars 22a. As a result, the labor for drilling and caulking for connecting the cage main body 20 and the second annular body 30 by the rivet 23 is reduced, and the man-hours for manufacturing and assembling the cage 14 can be reduced. As a result, it is possible to contribute to the cost reduction of the cage 14 and further to the cost reduction of the rolling bearing 10 provided with the cage 14.

特に本実施形態では（図２及び図３参照）、第三柱２２ｃにおいて、軸方向一方側の端面４４が第二環状体３０の軸方向他方側の面４５に対して接触可能であるが、第二環状体３０と非連結状態にある。このように、１５本の柱２２の中には、第一柱２２ａ及び第二柱２２ｂの他に、第三柱２２ｃが含まれており、リベット２３を用いて保持器本体２０と第二環状体３０とを連結する箇所を減らしている。すなわち、１５本の柱２２のうち、一部（６本）が爪３１と突起３４とにより第二環状体３０と連結される第二柱２２ｂであって、その残りの全数（９本）が、リベット２３が用いられる第一柱２２ａである場合よりも、本実施形態のように、第三柱２２ｃが（３本）更に含まれていることで、リベット２３が用いられる第一柱２２ａの数を減らすことができる。よって、保持器１４の製造及び組み立て工数をより一層低減することが可能となる。 In particular, in the present embodiment (see FIGS. 2 and 3), in the third column 22c, the end surface 44 on one side in the axial direction is in contact with the surface 45 on the other side in the axial direction of the second annular body 30. It is in a non-connected state with the second annular body 30. As described above, the 15 pillars 22 include the third pillar 22c in addition to the first pillar 22a and the second pillar 22b, and the cage main body 20 and the second ring ring using the rivet 23. The number of places connected to the body 30 is reduced. That is, of the 15 pillars 22, a part (6) is the second pillar 22b connected to the second annular body 30 by the claw 31 and the protrusion 34, and the remaining total number (9) is. As in the present embodiment, the first pillar 22a in which the rivet 23 is used is provided with (three) more third pillars 22c than in the case where the rivet 23 is the first pillar 22a in which the rivet 23 is used. You can reduce the number. Therefore, it is possible to further reduce the man-hours for manufacturing and assembling the cage 14.

ここで、保持器１４と円筒ころ１３との組み立てについて説明する。
まず、保持器本体２０において、周方向で隣り合う柱２２，２２の間に、円筒ころ１３を配置する。本実施形態では、図３に示すように、各柱２２の周方向に向く側面４７は、円筒ころ１３よりも僅かに半径が大きい円弧面形状であり、柱２２，２２の間に設けられた円筒ころ１３は、径方向に脱落不能な状態となる。 Here, the assembly of the cage 14 and the cylindrical roller 13 will be described.
First, in the cage main body 20, the cylindrical roller 13 is arranged between the columns 22 and 22 adjacent to each other in the circumferential direction. In the present embodiment, as shown in FIG. 3, the side surface 47 facing the circumferential direction of each pillar 22 has an arcuate surface shape having a slightly larger radius than the cylindrical roller 13, and is provided between the pillars 22 and 22. The cylindrical roller 13 is in a state where it cannot fall off in the radial direction.

このようにして保持器本体２０と円筒ころ１３とを組み合わせた状態で、保持器本体２０の軸方向一方側に第二環状体３０を位置させる。この際、図６に示すように、第二柱２２ｂの爪３１を、第二環状体３０の凹部３３のうち突起３４の周方向一方側の隣りに設けられている前記スペース３５に挿入した状態とする。図６は、保持器１４の一部を軸方向一方側から見た図である。そして、保持器本体２０（第二柱部２２ｂ）に対して第二環状体３０を相対的に周方向一方側（図６の矢印Ｒ方向）に回転させると、爪３１と突起３４とを係合させることができる。 In this way, with the cage body 20 and the cylindrical roller 13 combined, the second annular body 30 is positioned on one side of the cage body 20 in the axial direction. At this time, as shown in FIG. 6, a state in which the claw 31 of the second pillar 22b is inserted into the space 35 provided on one side of the recess 33 of the second annular body 30 in the circumferential direction. And. FIG. 6 is a view of a part of the cage 14 as viewed from one side in the axial direction. Then, when the second annular body 30 is rotated relatively to one side in the circumferential direction (in the direction of arrow R in FIG. 6) with respect to the cage main body 20 (second pillar portion 22b), the claw 31 and the protrusion 34 are engaged. Can be matched.

この状態で（図２参照）、保持器本体２０側に形成されている第一の貫通孔２７と、第二環状体３０側に形成されている第二の貫通孔２８とは同位相（周方向について同じ位置）となり、リベット２３をこれら貫通孔２７，２８に挿通し、リベット２３の端部をかしめ加工して、リベット２３が抜けないようにする。これにより、保持器本体２０と第二環状体３０とは相対回転不能となり、爪３１と突起３４との係合が解けない状態となる。
このように、本実施形態では、凹部３３において、突起３４の周方向一方側の隣りに、爪３１を軸方向に挿入可能とするスペース３５が設けられていることで、爪３１と突起３４との係合による保持器１４の組み立てが容易となり、しかも、組み立てが完了すると、爪３１と突起３４との係合によって保持器本体２０と第二環状体３０とは機構的に結合され、保持器１４の剛性が高まる。 In this state (see FIG. 2), the first through hole 27 formed on the cage body 20 side and the second through hole 28 formed on the second annular body 30 side are in phase (periphery). The rivet 23 is inserted into these through holes 27 and 28, and the end portion of the rivet 23 is crimped to prevent the rivet 23 from coming off. As a result, the cage main body 20 and the second annular body 30 cannot rotate relative to each other, and the engagement between the claw 31 and the protrusion 34 cannot be disengaged.
As described above, in the present embodiment, in the recess 33, a space 35 that allows the claw 31 to be inserted in the axial direction is provided next to one side of the protrusion 34 in the circumferential direction, so that the claw 31 and the protrusion 34 are provided. Assembling of the cage 14 is facilitated by the engagement of the cage 31, and when the assembly is completed, the cage body 20 and the second annular body 30 are mechanically coupled by the engagement between the claw 31 and the protrusion 34, and the cage is assembled. The rigidity of 14 is increased.

前記実施形態では（図４参照）、第二環状体３０に形成されている凹部３３は、径方向外側に向かって開口しているが、径方向内側に向かって開口していてもよい。この場合、図２が保持器１４を径方向内側から見た場合の図であると考えればよく、この場合においても、前記実施形態と同じ機能を有することができる。 In the embodiment (see FIG. 4), the recess 33 formed in the second annular body 30 is open outward in the radial direction, but may be open inward in the radial direction. In this case, it can be considered that FIG. 2 is a view when the cage 14 is viewed from the inside in the radial direction, and even in this case, it can have the same function as that of the embodiment.

図７は、第二柱２２ｂの爪３１、及び第二環状体３０の凹部３３の突起３４の変形例を示す図であり、保持器１４の一部を径方向外側から見た図である。この図７に示す形態においても、凹部３３の周方向の一部に突起３４が設けられている。また、この凹部３３において、周方向一方側に軸方向に貫通しているスペース３５が設けられており、その周方向他方側に軸方向の障壁となる突起３４が設けられている。突起３４は、直方体乃至立方体形状を備えており、軸方向一方側に向く第一面３６と、周方向一方側に向く第二面３７と、軸方向他方側に向く第三面３８とを有している。これに対して、爪３１は、第二柱２２ｂの軸方向一方側の端面４１から軸方向一方側に更に突出している軸方向突出部４２と、この軸方向突出部４２の軸方向一方側の先部から周方向他方側へ突出している周方向突出部４６とを有している。これにより、爪３１は、第一面３６に対向する第四面３９と、第二面３７に対向する第五面４０とを有する構成となる。そして、第二柱２２ｂの軸方向一方側の端面４１が、第三面３８に対向する。 FIG. 7 is a view showing a modified example of the claw 31 of the second pillar 22b and the protrusion 34 of the recess 33 of the second annular body 30, and is a view of a part of the cage 14 viewed from the outside in the radial direction. Also in the form shown in FIG. 7, a protrusion 34 is provided in a part of the concave portion 33 in the circumferential direction. Further, in the recess 33, a space 35 penetrating in the axial direction is provided on one side in the circumferential direction, and a protrusion 34 serving as an axial barrier is provided on the other side in the circumferential direction. The protrusion 34 has a rectangular parallelepiped to cubic shape, and has a first surface 36 facing one side in the axial direction, a second surface 37 facing one side in the circumferential direction, and a third surface 38 facing the other side in the axial direction. is doing. On the other hand, the claw 31 has an axial protrusion 42 that further protrudes from the end surface 41 on one axial side of the second pillar 22b to one side in the axial direction, and the claw 31 on one side in the axial direction of the axial protrusion 42. It has a circumferential projecting portion 46 projecting from the front portion to the other side in the circumferential direction. As a result, the claw 31 has a fourth surface 39 facing the first surface 36 and a fifth surface 40 facing the second surface 37. Then, the end surface 41 on one side in the axial direction of the second pillar 22b faces the third surface 38.

爪３１が突起３４に係合した状態で、第一面３６と第四面３９とが面接触可能であり、第二面３７と第五面４０とが面接触可能であり、第二柱２２ｂの軸方向一方側の端面４１と第三面３８とが面接触可能となる。第四面３９と第二柱２２ｂの端面４１との間に突起３４が介在することで、第二柱２２ｂと第二環状体３０とは軸方向に分離不能となって連結される。そして、凹部３３において、突起３４の周方向一方側の隣りに、爪３１を軸方向に挿入可能とするスペース３５が設けられているので、図５及び図６に示す形態の場合と同様に、組み立てが容易となり、また、リベット２３で保持器本体２０と第二環状体３０とを連結すると、爪３１と突起３４との係合が解けない状態となる。 With the claw 31 engaged with the protrusion 34, the first surface 36 and the fourth surface 39 can be in surface contact, the second surface 37 and the fifth surface 40 can be in surface contact, and the second pillar 22b. The end surface 41 on one side in the axial direction and the third surface 38 can be in surface contact with each other. By interposing the protrusion 34 between the fourth surface 39 and the end surface 41 of the second pillar 22b, the second pillar 22b and the second annular body 30 are inseparably connected in the axial direction. Further, in the recess 33, a space 35 is provided next to one side of the protrusion 34 in the circumferential direction so that the claw 31 can be inserted in the axial direction. Assembling becomes easy, and when the cage body 20 and the second annular body 30 are connected by the rivet 23, the engagement between the claw 31 and the protrusion 34 cannot be disengaged.

以上のとおり開示した実施形態はすべての点で例示であって制限的なものではない。つまり、本発明の保持器及び転がり軸受は、図示する形態に限らず本発明の範囲内において他の形態のものであってもよい。例えば、爪３１と突起３４は、図示した形態（突起３４に関して直方体乃至立方体）以外であってもよい。
前記実施形態の保持器１４は、第一柱２２ａ及び第二柱２２ｂの他に第三柱２２ｃを有している場合について説明したが、第三柱２２ｃは無くてもよい。つまり、複数の柱２２のうちの一部が第一柱２２ａであり、残りが第二柱２２ｂであってもよい。
図１に示す形態では、転動体である円筒ころ１３が軸方向に二列並ぶ構成であるが、一列であってもよい。また、内輪１１や外輪１２は他の形態であってもよい。保持器１４は、円筒ころ１３以外に、円すいころや針状ころ等を保持するものであってもよく、また、自動調心ころ軸受用の保持器であってもよい。
また、本発明の保持器を備えている転がり軸受は、鉄鋼圧延機におけるワークロールスラスト用以外であってもよい。 The embodiments disclosed as described above are exemplary in all respects and are not restrictive. That is, the cage and the rolling bearing of the present invention are not limited to the illustrated form, and may be of other forms within the scope of the present invention. For example, the claw 31 and the protrusion 34 may have a form other than the illustrated form (a rectangular parallelepiped or a cube with respect to the protrusion 34).
Although the case where the cage 14 of the embodiment has the third pillar 22c in addition to the first pillar 22a and the second pillar 22b has been described, the third pillar 22c may be omitted. That is, a part of the plurality of pillars 22 may be the first pillar 22a, and the rest may be the second pillar 22b.
In the form shown in FIG. 1, the cylindrical rollers 13 which are rolling elements are arranged in two rows in the axial direction, but they may be in one row. Further, the inner ring 11 and the outer ring 12 may have other forms. In addition to the cylindrical roller 13, the cage 14 may hold a tapered roller, a needle roller, or the like, or may be a cage for self-aligning roller bearings.
Further, the rolling bearing provided with the cage of the present invention may be other than the one for work roll thrust in a steel rolling mill.

１０：転がり軸受 １１：内輪 １２：外輪
１３：円筒ころ（転動体） １４：保持器 ２０：保持器本体
２１：第一環状体 ２２：柱 ２２ａ：第一柱
２２ｂ：第二柱 ２２ｃ：第三柱 ２３：リベット（軸部材）
２７：第一の貫通孔 ２８：第二の貫通孔 ２９：空間
３０：第二環状体 ３１：爪 ３２：第二柱と連結される部分
３３：凹部 ３４：突起 ３５：スペース
３６：第一面 ３７：第二面 ３８：第三面
３９：第四面 ４０：第五面 ４１：端面
４５：面 10: Rolling bearing 11: Inner ring 12: Outer ring 13: Cylindrical roller (rolling body) 14: Cage 20: Cage body 21: First annular body 22: Pillar 22a: First pillar 22b: Second pillar 22c: Third Pillar 23: Rivets (shaft members)
27: First through hole 28: Second through hole 29: Space 30: Second annular body 31: Claw 32: Part connected to the second pillar 33: Recess 34: Protrusion 35: Space 36: First surface 37: 2nd surface 38: 3rd surface 39: 4th surface 40: 5th surface 41: End surface 45: Surface

Claims (3)

第一環状体及び当該第一環状体から軸方向一方側に延在している複数の柱を有する保持器本体と、複数の前記柱の軸方向一方側に設けられている第二環状体と、前記柱の数よりも少なく前記保持器本体と前記第二環状体とを軸方向に貫通して連結するための軸部材と、を備え、前記第一環状体と前記第二環状体との間であって周方向で隣り合う前記柱の間の空間が転動体を保持するポケットとなる保持器であって、
前記複数の柱には、前記軸部材を挿通させる第一の貫通孔が形成されている第一柱と、軸方向一方側の端部に爪を有する第二柱と、が含まれ、
前記第二環状体のうち前記第一柱と連結される部分に前記軸部材を挿通させる第二の貫通孔が形成され、
前記第二環状体のうち前記第二柱と連結される部分に、前記爪を収容する凹部が形成されており、当該凹部の一部に前記爪と係合する突起が設けられ、
前記凹部において、前記突起の周方向一方側の隣りに、前記爪を軸方向に挿入可能とするスペースが設けられ、
前記凹部において、前記突起の周方向他方側の隣りに、前記第二環状体の壁面があり、
前記爪は、周方向一方側の第六面と、周方向他方側の第七面と、を有し、
前記壁面に前記第七面が当接する一方、前記スペースに前記第六面が露出し、
前記軸部材が前記第一の貫通孔と前記第二の貫通孔とに挿通され、
前記凹部は、径方向外側又は内側、及び、軸方向他方側に向かって開口しており、
前記突起は、軸方向一方側に向く第一面と、径方向に向く第二面と、軸方向他方側に向く第三面と、を有し、
前記爪は、前記第一面に対向する第四面と、前記第二面に対向する第五面と、を有し、
前記第二柱の軸方向一方側の端面が、前記第三面に対向すると共に、当該端面から前記爪が突出している、
保持器。 A cage main body having a first annular body and a plurality of columns extending on one side in the axial direction from the first annular body, and a second annular body provided on one side in the axial direction of the plurality of columns. A shaft member for axially penetrating and connecting the cage main body and the second annular body, which is smaller than the number of the pillars, is provided, and the first annular body and the second annular body are provided. The space between the pillars adjacent to each other in the circumferential direction is a cage that serves as a pocket for holding the rolling elements.
The plurality of pillars include a first pillar in which a first through hole through which the shaft member is inserted is formed, and a second pillar having a claw at one end in the axial direction.
A second through hole through which the shaft member is inserted is formed in a portion of the second annular body connected to the first pillar.
A recess for accommodating the claw is formed in a portion of the second annular body connected to the second pillar, and a protrusion engaging with the claw is provided in a part of the recess.
In the recess, a space is provided next to one side of the protrusion in the circumferential direction so that the claw can be inserted in the axial direction.
In the recess, next to the other side in the circumferential direction of the protrusion, there is a wall surface of the second annular body.
The claw has a sixth surface on one side in the circumferential direction and a seventh surface on the other side in the circumferential direction.
While the seventh surface abuts on the wall surface, the sixth surface is exposed in the space.
The shaft member is inserted into the first through hole and the second through hole, and the shaft member is inserted into the first through hole.
The recess is open outward or inside in the radial direction and toward the other side in the axial direction.
The protrusion has a first surface facing one side in the axial direction, a second surface facing the radial direction, and a third surface facing the other side in the axial direction.
The claw has a fourth surface facing the first surface and a fifth surface facing the second surface.
The end face on one side in the axial direction of the second pillar faces the third surface, and the claws protrude from the end face.
Cage. 前記複数の柱には、更に、軸方向一方側の端面が前記第二環状体の軸方向他方側の面に対して接触可能であって当該第二環状体と非連結状態にある第三柱が含まれている、請求項１に記載の保持器。 Further, the plurality of columns have a third column in which one end surface in the axial direction is in contact with the other surface in the axial direction of the second annular body and is not connected to the second annular body. The cage according to claim 1, wherein the cage is included. 内輪と、外輪と、前記内輪と前記外輪との間に設けられている複数の転動体と、前記複数の転動体を保持する環状の保持器と、を備え、
前記保持器が、請求項１又は請求項２に記載の保持器である、転がり軸受。 The inner ring, the outer ring, a plurality of rolling elements provided between the inner ring and the outer ring, and an annular cage for holding the plurality of rolling elements are provided.
A rolling bearing in which the cage is the cage according to claim 1 or 2 .
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