JP2015140918A - Self-aligning roller bearing - Google Patents

Self-aligning roller bearing Download PDF

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JP2015140918A
JP2015140918A JP2014015928A JP2014015928A JP2015140918A JP 2015140918 A JP2015140918 A JP 2015140918A JP 2014015928 A JP2014015928 A JP 2014015928A JP 2014015928 A JP2014015928 A JP 2014015928A JP 2015140918 A JP2015140918 A JP 2015140918A
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spherical
rim portion
self
roller bearing
cage
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JP6337482B2 (en
Inventor
智史 牛丸
Satoshi Ushimaru
智史 牛丸
村井　隆司
Takashi Murai
隆司 村井
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
    • F16C23/086—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface forming a track for rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/541—Details of individual pockets, e.g. shape or roller retaining means
    • 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
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • 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
    • F16C19/38—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 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/46—Gap sizes or clearances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4676—Details of individual pockets, e.g. shape or roller retaining means of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of the rollers

Abstract

PROBLEM TO BE SOLVED: To provide a self-aligning roller bearing which can improve weight saving, component management and assemblability by using a metal cage.SOLUTION: A self-aligning roller bearing includes: an annular intermediate rim part 10 arranged between spherical rollers 3 on both rows; a pair of annular outside rim parts 11 arranged on the opposite side from the intermediate rim part 10 respectively in an axial direction with respect to the spherical rollers; and a plurality of column parts 12 for connecting the intermediate rim part 10 and each outside rim part 11 in a circumferential direction at a predetermined interval respectively. Between the column parts 12 adjacent to each other in the circumferential direction, an integrated type iron cage 4a including a plurality of pockets 13 for holding the spherical rollers 3 in a freely rolling manner is provided. An inner diameter φd of the outside rim part 11 is larger than a maximum outer diameter φD of an inner ring 2.

Description

本発明は、自動調心ころ軸受に関し、より詳細には、ハウジングの内側に回転軸を支承するため、各種産業機械装置のロール等の回転支持部に組み込んだ状態で使用される自動調心ころ軸受に関する。   The present invention relates to a self-aligning roller bearing, and more particularly, to a self-aligning roller used in a state where it is incorporated in a rotation support portion such as a roll of various industrial machine devices in order to support a rotating shaft inside a housing. Related to bearings.

従来の自動調心ころ軸受としては、球面ころを保持する保持器が鋼板に打ち抜き加工を施すことで形成され、また、複列の球面ころ間に球面ころの端面を案内する案内輪が配置されるものが種々考案されている（例えば、特許文献１及び２参照。）。   As a conventional self-aligning roller bearing, a cage for holding a spherical roller is formed by punching a steel plate, and a guide wheel for guiding the end face of the spherical roller is arranged between the double-row spherical rollers. Various devices have been devised (see, for example, Patent Documents 1 and 2).

図６は、従来の自動調心ころ軸受を示しており、外輪１の内周面には、単一の中心を有する球面状凹面である外輪軌道１ａが形成されている。また、内輪２の外周面の幅方向両側には、それぞれが外輪軌道１ａと対向する１対の内輪軌道２ａが形成されている。また、複数の球面ころ３は、その最大径部が各球面ころ３の軸方向長さの中央部にある対称形で、外輪軌道１ａと内輪軌道２ａとの間の両列毎に、複数個ずつ転動自在に配置されている。各球面ころ３の転動面の母線形状の曲率半径は、外輪軌道１ａ及び内輪軌道２ａの母線形状の曲率半径より僅かに小さい。   FIG. 6 shows a conventional self-aligning roller bearing, and an outer ring raceway 1 a that is a spherical concave surface having a single center is formed on the inner peripheral surface of the outer ring 1. Also, a pair of inner ring raceways 2a are formed on both sides of the outer circumferential surface of the inner ring 2 in the width direction so as to face the outer ring raceway 1a. In addition, the plurality of spherical rollers 3 are symmetrical in that the maximum diameter portion is in the center of the axial length of each spherical roller 3, and a plurality of spherical rollers 3 are provided for each row between the outer ring raceway 1a and the inner ring raceway 2a. It is arranged to roll freely. The radius of curvature of the generatrix of the rolling surface of each spherical roller 3 is slightly smaller than the radius of curvature of the generatrix of the outer ring raceway 1a and the inner ring raceway 2a.

各列の球面ころ３は、１対の鉄製の保持器４によってそれぞれ転動自在に保持されている。各保持器４は、球面ころ３の両側に設けられた円環状の内側リム部５ａ及び外側リム部５ｂと、内側リム部５ａと外側リム部５ｂとを円周方向複数個所で結合する複数の柱部６とを備え、逆Ｌ字状断面形状に形成される。そして、保持器４は、円周方向に隣り合う柱部６同士の間に、球面ころ３を転動自在に保持する複数のポケット７を備える。また、内輪２の中央の外径面部と、保持器４の内側リム部５ａの内径面との間には、案内輪８が設けられている。   The spherical rollers 3 in each row are held by a pair of iron cages 4 so as to be freely rollable. Each retainer 4 includes a plurality of annular inner rim portions 5a and outer rim portions 5b provided on both sides of the spherical roller 3, and a plurality of inner rim portions 5a and outer rim portions 5b coupled at a plurality of positions in the circumferential direction. It is provided with a column part 6 and is formed in an inverted L-shaped cross-sectional shape. And the holder | retainer 4 is provided with the some pocket 7 which hold | maintains the spherical roller 3 so that rolling is possible between column parts 6 adjacent to the circumferential direction. Further, a guide wheel 8 is provided between the center outer diameter surface portion of the inner ring 2 and the inner diameter surface of the inner rim portion 5 a of the cage 4.

特開２００１−１４０８７５号公報JP 2001-140875 A 特開２００７−２０５３８８号公報JP 2007-205388 A

しかしながら、図６に示す自動調心ころ軸受によれば、保持器４は、案内輪８の外周面及び、外側リム部５ｂのフランジ部９によって案内される軌道輪案内方式であるため、外側リム部５ｂには内輪２に近接するためのフランジ部９が必要になり、その分だけ保持器４の重量が大きくなるという課題がある。また、球面ころ３の端面を案内するとともに、保持器４の内側リム部５ａの内径面を案内する案内輪８が必要な構成であるため、案内輪８の分だけ重量が大きくなると共に、部品管理を行う際の部品点数も多くなるという課題がある。さらに、外側リム部５ｂには内輪２に近接するフランジ部９があるため、各列毎にそれぞれ保持器４を設けなければ組み込みできず、組立性の観点からも改善の余地があった。   However, according to the self-aligning roller bearing shown in FIG. 6, the cage 4 is a raceway guide system that is guided by the outer peripheral surface of the guide wheel 8 and the flange portion 9 of the outer rim portion 5b. The part 5b requires the flange part 9 for approaching the inner ring 2, and there is a problem that the weight of the retainer 4 increases accordingly. In addition, since the guide wheel 8 that guides the end surface of the spherical roller 3 and guides the inner surface of the inner rim portion 5a of the cage 4 is necessary, the weight is increased by the amount of the guide wheel 8, and There is a problem that the number of parts when managing is increased. Further, since the outer rim portion 5b has a flange portion 9 close to the inner ring 2, the outer rim portion 5b cannot be assembled unless the cage 4 is provided for each row, and there is room for improvement from the viewpoint of assembly.

本発明は、前述した課題に鑑みてなされたものであり、その目的は、鉄製の保持器を使用して、軽量化、且つ、部品管理及び組立性を向上することができる自動調心ころ軸受を提供することにある。   The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a self-aligning roller bearing capable of reducing weight and improving component management and assemblability by using an iron cage. Is to provide.

本発明の上記目的は、下記の構成により達成される。
（１） 球面状凹面である外輪軌道をその内周面に形成する外輪と、
前記外輪軌道と対向する１対の内輪軌道をその外周面に形成する内輪と、
前記外輪軌道と前記内輪軌道との間の両列毎に、複数個ずつ転動自在に配置される球面ころと、
前記両列の球面ころ同士の間に配置された円環状の中間リム部と、前記球面ころに対して軸方向において前記中間リム部と反対側にそれぞれ配置された円環状の１対の外側リム部と、前記中間リム部と前記各外側リム部とを円周方向に所定の間隔でそれぞれ連結する複数の柱部とを有し、円周方向に隣り合う柱部同士の間に前記球面ころを転動自在に保持する複数のポケットを形成する一体型の鉄製の保持器と、
を備え、
前記外側リム部の内径は、前記内輪の最大外径よりも大きいことを特徴とする自動調心ころ軸受。
（２） 前記保持器は、ころ案内方式であることを特徴とする（１）に記載の自動調心ころ軸受。
（３） 前記保持器は、少なくとも前記中間リム部において断面直線形状に形成されていることを特徴とする（１）又は（２）に記載の自動調心ころ軸受。
（４） 前記各ポケットの隅部は、前記各柱部の円周方向両側面と前記中間リム部及び外側リム部の軸方向側面とを断面円弧状の凹曲面により連続させることを特徴とする（１）〜（３）のいずれかに記載の自動調心ころ軸受。
（５） 前記各柱部の円周方向側面は、前記球面ころの軸方向の曲率半径よりも大きい、軸方向の曲率半径を有する曲面形状を有することを特徴とする（１）〜（４）のいずれかに記載の自動調心ころ軸受。 The above object of the present invention can be achieved by the following constitution.
(1) an outer ring that forms an outer ring raceway that is a spherical concave surface on its inner circumferential surface;
An inner ring forming a pair of inner ring raceways opposed to the outer ring raceway on its outer peripheral surface;
A plurality of spherical rollers that are arranged so as to roll freely for each row between the outer ring raceway and the inner ring raceway,
An annular intermediate rim portion disposed between the spherical rollers in both rows, and a pair of annular outer rims disposed on the opposite side of the intermediate rim portion in the axial direction with respect to the spherical rollers. And a plurality of pillars that respectively connect the intermediate rim part and each outer rim part in the circumferential direction at a predetermined interval, and the spherical roller between the circumferentially neighboring pillar parts. An integrated iron retainer that forms a plurality of pockets for freely rolling,
With
A self-aligning roller bearing, wherein an inner diameter of the outer rim portion is larger than a maximum outer diameter of the inner ring.
(2) The self-aligning roller bearing according to (1), wherein the cage is a roller guide system.
(3) The self-aligning roller bearing according to (1) or (2), wherein the cage is formed in a linear cross-sectional shape at least in the intermediate rim portion.
(4) The corners of the pockets are characterized in that both circumferential side surfaces of the column portions and axial side surfaces of the intermediate rim portion and the outer rim portion are continuous by a concave curved surface having a circular arc cross section. The self-aligning roller bearing according to any one of (1) to (3).
(5) The circumferential side surface of each column part has a curved surface shape having a radius of curvature in the axial direction that is larger than the radius of curvature of the spherical roller in the axial direction (1) to (4). Spherical roller bearings according to any of the above.

本発明の自動調心ころ軸受によれば、保持器を、中間リム部と、１対の外側リム部と、中間リム部と各外側リム部とを円周方向に所定の間隔でそれぞれ連結する複数の柱部とを有し、円周方向に隣り合う柱部同士の間に球面ころを転動自在に保持する複数のポケットを形成する一体型の鉄製の保持器によって構成し、外側リム部の内径を、内輪の最大外径よりも大きくしている。これにより、鉄製の保持器を使用して、保持器の重量を抑えることができると共に、案内輪を不要とすることができ、軽量化、且つ、部品管理及び組立性を向上することができる。   According to the self-aligning roller bearing of the present invention, the cage is connected to the intermediate rim portion, the pair of outer rim portions, the intermediate rim portion and each outer rim portion at predetermined intervals in the circumferential direction. The outer rim portion is formed by an integrated iron cage that has a plurality of column portions and forms a plurality of pockets that rotatably hold the spherical roller between the column portions adjacent to each other in the circumferential direction. The inner diameter of the inner ring is larger than the maximum outer diameter of the inner ring. Accordingly, the weight of the cage can be suppressed by using the iron cage, the guide wheel can be made unnecessary, the weight can be reduced, and the parts management and assembling can be improved.

本発明の第１実施形態に係る自動調心ころ軸受の断面図である。It is sectional drawing of the self-aligning roller bearing which concerns on 1st Embodiment of this invention. 図１の保持器の要部拡大斜視図である。It is a principal part expansion perspective view of the holder | retainer of FIG. （ａ）は、図１の保持器及び球面ころを内側から見た要部拡大図である。（ｂ）は、図１のＩＩＩ−ＩＩＩ線に沿った保持器及び球面ころの断面図であり、（ｃ）は、変形例に係る（ｂ）に対応する断面図である。(A) is the principal part enlarged view which looked at the holder | retainer and spherical roller of FIG. 1 from the inner side. (B) is sectional drawing of the holder | retainer and spherical roller which followed the III-III line | wire of FIG. 1, (c) is sectional drawing corresponding to (b) which concerns on a modification. 本発明の第２実施形態に係る自動調心ころ軸受の断面図である。It is sectional drawing of the self-aligning roller bearing which concerns on 2nd Embodiment of this invention. 本発明の変形例に係る自動調心ころ軸受の断面図である。It is sectional drawing of the self-aligning roller bearing which concerns on the modification of this invention. 従来の自動調心ころ軸受の断面図である。It is sectional drawing of the conventional self-aligning roller bearing.

（第１実施形態）
以下、本発明の第１実施形態に係る自動調心ころ軸受を図１〜図３に基づいて詳細に説明する。なお、本実施形態の自動調心ころ軸受は、外輪１と、内輪２と、複数個の球面ころ３と、鉄製の保持器４ａと、を備える点において、従来構造と同様とする一方、案内輪を不要とし、鉄製の保持器４ａを複列の球面ころ３に対して単一部材によって構成している。 (First embodiment)
Hereinafter, a self-aligning roller bearing according to a first embodiment of the present invention will be described in detail with reference to FIGS. The self-aligning roller bearing of the present embodiment is similar to the conventional structure in that it includes an outer ring 1, an inner ring 2, a plurality of spherical rollers 3, and an iron cage 4a. No ring is required, and the iron cage 4a is constituted by a single member with respect to the double row spherical rollers 3.

具体的に、本実施形態の自動調心ころ軸受は、球面状凹面である外輪軌道１ａをその内周面に形成する外輪１と、外輪軌道１ａと対向する１対の内輪軌道２ａをその外周面に形成する内輪２と、外輪軌道１ａと内輪軌道２ａとの間の両列毎に、複数個ずつ転動自在に配置される球面ころ３と、球面ころ３を転動自在に保持する複数のポケット１３を二列備えた一体型の鉄製の保持器４ａと、を備える。   Specifically, the self-aligning roller bearing of the present embodiment includes an outer ring 1 that forms an outer ring raceway 1a that is a spherical concave surface on an inner peripheral surface thereof, and a pair of inner ring raceways 2a that are opposed to the outer ring raceway 1a. The inner ring 2 formed on the surface, the spherical rollers 3 arranged in a plurality of rolls for each row between the outer ring raceway 1a and the inner ring raceway 2a, and a plurality of rolls for holding the spherical rollers 3 in a rollable manner. And an integrated iron cage 4a provided with two rows of pockets 13.

即ち、保持器４ａは、鉄製の単一部材からなり、ころ案内方式としている。保持器４ａは、図２にも示すように、両列の球面ころ３同士の間に配置された円環状の中間リム部１０と、球面ころ３に対して軸方向において中間リム部１０と反対側にそれぞれ配置された円環状の１対の外側リム部１１と、中間リム部１０と各外側リム部１１とを円周方向に所定の間隔でそれぞれ連結する複数の柱部１２とを有し、円周方向に隣り合う柱部１２同士の間に球面ころ３を転動自在に保持する複数のポケット１３を形成する。   That is, the cage 4a is made of a single member made of iron and has a roller guide system. As shown in FIG. 2, the cage 4 a is an annular intermediate rim portion 10 disposed between the two rows of spherical rollers 3, and is opposite to the intermediate rim portion 10 in the axial direction with respect to the spherical rollers 3. A pair of annular outer rim portions 11 arranged on the respective sides, and a plurality of column portions 12 respectively connecting the intermediate rim portion 10 and each outer rim portion 11 at predetermined intervals in the circumferential direction. A plurality of pockets 13 are formed between the column portions 12 adjacent to each other in the circumferential direction so as to hold the spherical roller 3 in a rollable manner.

各列の柱部１２は、それぞれの柱部１２の円周方向中間位置が、該柱部１２が位置する列と異なる列のポケット１３の円周方向中間位置となるように、円周方向における位相が互いに異なっている。
なお、各列の柱部１２は、円周方向において同位相に形成されてもよい。 The column portions 12 in each row are arranged in the circumferential direction so that the intermediate position in the circumferential direction of each column portion 12 is the intermediate position in the circumferential direction of the pocket 13 in a row different from the row in which the column portion 12 is located. The phases are different from each other.
In addition, the column part 12 of each row | line | column may be formed in the same phase in the circumferential direction.

また、図１に示すように、保持器４ａは、一方の列の外側リム部１１及び柱部１２から、中間リム部１０を介して、他方の列の外側リム部１１及び柱部１２まで、断面円弧形状に形成されている。具体的には、各列の柱部１２の位相が互いに異なるので、一方の列の外側リム部１１、柱部１２、及び中間リム部１０と、他方の列の外側リム部１１、柱部１２及び中間リム部１０とは、それぞれ同一の曲率半径の断面円弧形状で形成されている。さらに、外側リム部１１の軸方向端面１１ａには、平面が設けられている。   As shown in FIG. 1, the retainer 4a is connected from the outer rim portion 11 and the column portion 12 of one row to the outer rim portion 11 and the column portion 12 of the other row through the intermediate rim portion 10. The cross-sectional arc shape is formed. Specifically, since the phases of the column portions 12 in each row are different from each other, the outer rim portion 11, the column portion 12, and the intermediate rim portion 10 in one row, and the outer rim portion 11 and the column portion 12 in the other row. And the intermediate | middle rim | limb part 10 is formed in the cross-sectional arc shape of the same curvature radius, respectively. Further, a flat surface is provided on the axial end surface 11 a of the outer rim portion 11.

また、図２及び図３（ａ）に示すように、各ポケット１３の隅部は、各柱部１２の円周方向両側面と中間リム部１０及び外側リム部１１の軸方向側面とを断面円弧状の凹曲面１４により連続させている。これにより、ポケット１３の隅部に加わる応力を緩和することができ、保持器４ａの耐久性を確保することができる。   As shown in FIGS. 2 and 3A, the corners of the pockets 13 are cross sections of the circumferential side surfaces of the column portions 12 and the axial side surfaces of the intermediate rim portion 10 and the outer rim portion 11. It is made continuous by the arcuate concave curved surface 14. Thereby, the stress added to the corner part of the pocket 13 can be relieved, and the durability of the cage 4a can be ensured.

なお、このような保持器４ａは、ころ案内方式であるため、外側リム部１１に従来のような内輪２に近接するフランジ部を設ける必要がない。このため、外側リム部１１の内径（φｄ）は、内輪２の最大外径（φＤ）よりも大きく設定されており、一体型の保持器４ａを内輪２に軸方向から挿入することができる。また、外側リム部１１に従来のようなフランジ部を設ける必要がないことから、自動調心ころ軸受の軸方向両端部から軸受空間内に、潤滑剤を容易に供給することができる。   In addition, since such a holder | retainer 4a is a roller guide system, it is not necessary to provide the outer rim part 11 with the flange part which adjoins the inner ring | wheel 2 like the past. For this reason, the inner diameter (φd) of the outer rim portion 11 is set larger than the maximum outer diameter (φD) of the inner ring 2, and the integrated cage 4 a can be inserted into the inner ring 2 from the axial direction. Further, since it is not necessary to provide a conventional flange portion on the outer rim portion 11, the lubricant can be easily supplied into the bearing space from both axial end portions of the self-aligning roller bearing.

また、各柱部１２の円周方向側面は、球面ころ３の転動面と軸方向において略相似形を有している。図３（ａ）に示すように、各柱部１２の円周方向側面は、球面ころ３の軸方向の曲率半径Ｒよりも若干大きい、軸方向の曲率半径Ｒ＋ΔＲを有する曲面形状を有し、円周方向側面と球面ころ３との間に、潤滑剤を送り込み可能なポケット隙間を形成している。
なお、径方向から見て球面ころ３の中心軸がポケット１３の円周方向中間位置と一致する状態での、ポケット隙間は、０．１〜０．５ｍｍ程度、或いは、各球面ころ３の最大径の０．４〜２％程度であり、ΔＲは、ポケット隙間の寸法以下に設定されればよい。
また、本実施形態では、柱部１２の円周方向側面の軸方向中間部は、軸方向において直線形状に形成されているが、これに限らず、軸方向に亘って単一の曲率半径Ｒ＋ΔＲで形成されてもよい。即ち、本発明の柱部１２の円周方向側面は、球面ころ３の軸方向変位を抑えることができる程度に、ポケット隙間を介して、球面ころ３の転動面と軸方向において略相似形に形成されればよい。 Further, the circumferential side surface of each column portion 12 has a substantially similar shape in the axial direction to the rolling surface of the spherical roller 3. As shown in FIG. 3A, the circumferential side surface of each column 12 has a curved surface shape having an axial curvature radius R + ΔR that is slightly larger than the axial curvature radius R of the spherical roller 3. A pocket clearance is formed between the circumferential side surface and the spherical roller 3 so that the lubricant can be fed.
The pocket clearance is about 0.1 to 0.5 mm or the maximum of each spherical roller 3 when the central axis of the spherical roller 3 coincides with the circumferential intermediate position of the pocket 13 when viewed from the radial direction. It is about 0.4 to 2% of the diameter, and ΔR may be set equal to or less than the dimension of the pocket gap.
Moreover, in this embodiment, although the axial direction intermediate part of the circumferential direction side surface of the pillar part 12 is formed in the linear shape in the axial direction, it is not restricted to this, A single curvature radius R + (DELTA) R over an axial direction May be formed. That is, the circumferential side surface of the column portion 12 of the present invention is substantially similar in the axial direction to the rolling surface of the spherical roller 3 through the pocket clearance so that the axial displacement of the spherical roller 3 can be suppressed. What is necessary is just to form.

さらに、図３（ｂ）に示すように、球面ころ３の軸方向中間部において、保持器４ａの柱部１２は、ピッチ円直径Ｐ．Ｃ．Ｄ．よりも外側に位置する。そして、各柱部１２の円周方向側面は、該円周方向側面によって球面ころ３の外径側への抜け止めがなされるように、各柱部１２の外周面が内周面よりも円周方向寸法が長くなるように形成されている。なお、各柱部１２の円周方向側面は、加工性の観点から、半径方向において直線形状に形成されているが、図３（ｃ）に示すように、曲面形状に形成されてもよい。   Further, as shown in FIG. 3 (b), in the axial intermediate portion of the spherical roller 3, the column portion 12 of the cage 4a has a pitch circle diameter P.I. C. D. Located outside. In addition, the circumferential side surface of each column portion 12 is more circular than the inner circumferential surface so that the outer circumferential surface of each column portion 12 is prevented from coming off to the outer diameter side of the spherical roller 3 by the circumferential side surface. The circumferential dimension is long. In addition, although the circumferential direction side surface of each pillar part 12 is formed in the linear shape in the radial direction from a viewpoint of workability, as shown in FIG.3 (c), you may form in a curved-surface shape.

以上説明したように、本実施形態の自動調心ころ軸受によれば、外側リム部１１の内径φｄが、内輪２の最大外径φＤよりも大きい一体型の鉄製の保持器４ａを用いることで、外側リム部１１に内輪２に案内するフランジ部を設ける必要がなく、保持器４ａの重量が抑えられる。
また、保持器４ａの各柱部１２の円周方向側面は、球面ころ３の転動面と軸方向において略相似形としており、これにより、球面ころ３の軸方向変位が抑えられる。さらに、保持器４ａは、複列の球面ころ３を保持することができるので、一方の列の球面ころ３がスキューして保持器４ａが傾こうとした場合であっても、保持器４ａは、他方の列の球面ころ３によっても案内されているので、保持器４ａが傾くのを防止することができる。このように、各柱部１２の円周方向側面を球面ころ３の転動面と略相似形とし、保持器４ａを一体形とした結果、案内輪を設けなくても、両列の球面ころ３のスキューを防止することができる。したがって、本実施形態によれば、鉄製の保持器４ａを使用して、保持器４ａの重量を抑えることができると共に、案内輪を不要とすることができ、軽量化、且つ、部品管理を向上することができる。さらに、外側リム部１１の内径φｄが、内輪２の最大外径φＤよりも大きい一体型の保持器４ａとすることで、容易に内輪２に組み付けることができ、組立性を向上することができる。 As described above, according to the self-aligning roller bearing of the present embodiment, by using the integrated iron cage 4a in which the inner diameter φd of the outer rim portion 11 is larger than the maximum outer diameter φD of the inner ring 2. In addition, it is not necessary to provide the outer rim portion 11 with a flange portion that guides the inner ring 2, and the weight of the cage 4a can be suppressed.
In addition, the circumferential side surface of each column portion 12 of the cage 4a is substantially similar to the rolling surface of the spherical roller 3 in the axial direction, whereby the axial displacement of the spherical roller 3 is suppressed. Furthermore, since the cage 4a can hold the double-row spherical rollers 3, even if the spherical rollers 3 in one row are skewed and the cage 4a is inclined, the cage 4a Since the guide is also guided by the spherical roller 3 in the other row, the cage 4a can be prevented from being inclined. Thus, as a result of making the circumferential side surface of each column portion 12 substantially similar to the rolling surface of the spherical roller 3 and integrating the cage 4a, both rows of spherical rollers can be provided without providing guide wheels. 3 skew can be prevented. Therefore, according to the present embodiment, the weight of the retainer 4a can be suppressed by using the iron retainer 4a, the guide wheel can be eliminated, the weight is reduced, and the parts management is improved. can do. Furthermore, by using the integrated cage 4a in which the inner diameter φd of the outer rim portion 11 is larger than the maximum outer diameter φD of the inner ring 2, it can be easily assembled to the inner ring 2 and the assemblability can be improved. .

また、保持器は、ころ案内方式であるので、外側リム部にフランジ部を設ける必要がないと共に、案内輪が不要となり、軽量化を図ることができる。   In addition, since the cage is a roller guide system, it is not necessary to provide a flange portion on the outer rim portion, and a guide wheel is not required, and the weight can be reduced.

（第２実施形態）
図４は、本発明の第２実施形態に係る自動調心ころ軸受を示す。なお、第１実施形態と同等部分については同一符号を付して、説明を省略或いは簡略化する。 (Second Embodiment)
FIG. 4 shows a self-aligning roller bearing according to a second embodiment of the present invention. In addition, the same code | symbol is attached | subjected about a part equivalent to 1st Embodiment, and description is abbreviate | omitted or simplified.

第２実施形態の自動調心ころ軸受では、保持器４ｂは、中間リム部１０を含む軸方向中間部１５が断面直線形状に形成されており、残りの部分が断面円弧形状に形成されている。このように、軸方向中間部１５を断面直線形状に形成することで、保持器４ｂを製造しやすく、また、保持器４ｂの寸法管理が容易となる。   In the self-aligning roller bearing of the second embodiment, the cage 4b is formed such that the axial intermediate portion 15 including the intermediate rim portion 10 is formed in a cross-sectional linear shape, and the remaining portion is formed in a circular arc shape in cross-section. . Thus, by forming the axial direction intermediate part 15 in a cross-sectional linear shape, the cage 4b can be easily manufactured, and the size management of the cage 4b is facilitated.

また、外側リム部１１の軸方向端面１１ａに第１実施形態よりも長い平面を確保する必要がある場合には、若干径方向内側に延びるフランジ部１６を形成してもよい。ただし、本実施形態の場合にも、外側リム部１１の内径（φｄ）が、内輪２の最大外径（φＤ）よりも大きくなる寸法関係は成立する。   Further, when it is necessary to secure a longer plane than the first embodiment on the axial end surface 11a of the outer rim portion 11, a flange portion 16 that extends slightly inward in the radial direction may be formed. However, also in the present embodiment, a dimensional relationship is established in which the inner diameter (φd) of the outer rim portion 11 is larger than the maximum outer diameter (φD) of the inner ring 2.

尚、本発明は、前述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。
例えば、第１及び第２実施形態のように、外側リム部１１の軸方向端面１１ａに平面を形成する必要がない場合には、図５に示す変形例のように、保持器４ｃは、外側リム部１１の軸方向端面１１ａまで断面円弧形状に形成すればよく、外側リム部１１にフランジ部を設ける必要もない。 In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, when it is not necessary to form a flat surface on the axial end surface 11a of the outer rim portion 11 as in the first and second embodiments, the retainer 4c is arranged on the outer side as in the modification shown in FIG. What is necessary is just to form in cross-sectional arc shape to the axial direction end surface 11a of the rim | limb part 11, and it is not necessary to provide a flange part in the outer side rim | limb part 11. FIG.

１ 外輪
２ 内輪
３ 球面ころ
４ａ、４ｂ、４ｃ 保持器
１０ 中間リム部
１１ 外側リム部
１２ 柱部
１３ ポケット
１４ 凹曲面 DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Spherical roller 4a, 4b, 4c Cage 10 Middle rim part 11 Outer rim part 12 Column part 13 Pocket 14 Concave surface

Claims (5)

球面状凹面である外輪軌道をその内周面に形成する外輪と、
前記外輪軌道と対向する１対の内輪軌道をその外周面に形成する内輪と、
前記外輪軌道と前記内輪軌道との間の両列毎に、複数個ずつ転動自在に配置される球面ころと、
前記両列の球面ころ同士の間に配置された円環状の中間リム部と、前記球面ころに対して軸方向において前記中間リム部と反対側にそれぞれ配置された円環状の１対の外側リム部と、前記中間リム部と前記各外側リム部とを円周方向に所定の間隔でそれぞれ連結する複数の柱部とを有し、円周方向に隣り合う柱部同士の間に前記球面ころを転動自在に保持する複数のポケットを形成する一体型の鉄製の保持器と、
を備え、
前記外側リム部の内径は、前記内輪の最大外径よりも大きいことを特徴とする自動調心ころ軸受。 An outer ring that forms an outer ring raceway that is a spherical concave surface on its inner circumferential surface;
An inner ring forming a pair of inner ring raceways opposed to the outer ring raceway on its outer peripheral surface;
A plurality of spherical rollers that are arranged so as to roll freely for each row between the outer ring raceway and the inner ring raceway,
An annular intermediate rim portion disposed between the spherical rollers in both rows, and a pair of annular outer rims disposed on the opposite side of the intermediate rim portion in the axial direction with respect to the spherical rollers. And a plurality of pillars that respectively connect the intermediate rim part and each outer rim part in the circumferential direction at a predetermined interval, and the spherical roller between the circumferentially neighboring pillar parts. An integrated iron retainer that forms a plurality of pockets for freely rolling,
With
A self-aligning roller bearing, wherein an inner diameter of the outer rim portion is larger than a maximum outer diameter of the inner ring. 前記保持器は、ころ案内方式であることを特徴とする請求項１に記載の自動調心ころ軸受。   The self-aligning roller bearing according to claim 1, wherein the cage is a roller guide system. 前記保持器は、少なくとも前記中間リム部において断面直線形状に形成されていることを特徴とする請求項１又は２に記載の自動調心ころ軸受。   The self-aligning roller bearing according to claim 1 or 2, wherein the cage is formed in a linear cross-sectional shape at least in the intermediate rim portion. 前記各ポケットの隅部は、前記各柱部の円周方向両側面と前記中間リム部及び外側リム部の軸方向側面とを断面円弧状の凹曲面により連続させることを特徴とする請求項１〜３のいずれか１項に記載の自動調心ころ軸受。   2. The corners of each of the pockets are formed by connecting both circumferential side surfaces of the column portions and axial side surfaces of the intermediate rim portion and the outer rim portion by a concave curved surface having a circular arc cross section. The spherical roller bearing according to any one of? 前記各柱部の円周方向側面は、前記球面ころの軸方向の曲率半径よりも大きい、軸方向の曲率半径を有する曲面形状を有することを特徴とする請求項１〜４のいずれか１項に記載の自動調心ころ軸受。   The circumferential side surface of each of the pillar portions has a curved surface shape having a radius of curvature in the axial direction that is larger than the radius of curvature of the spherical roller in the axial direction. Spherical roller bearings described in 1.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108999887A (en) * 2018-08-22 2018-12-14 大连国威轴承股份有限公司 A kind of precision self-aligning roller bearing

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JPS441601Y1 (en) * 1964-02-04 1969-01-22
JPH03144110A (en) * 1989-09-28 1991-06-19 Nippon Seiko Kk Double row automatic aligning roller bearing
JPH09317760A (en) * 1996-05-30 1997-12-09 Ntn Corp Self-aligning roller bearing
JP2006029539A (en) * 2004-07-21 2006-02-02 Nsk Ltd Self-aligning roller bearing
JP2007127167A (en) * 2005-11-02 2007-05-24 Nsk Ltd Self-aligning roller bearing with retainer
JP2007303608A (en) * 2006-05-12 2007-11-22 Nsk Ltd Double-row roller bearing with cage
JP2010025191A (en) * 2008-07-17 2010-02-04 Nsk Ltd Self-aligning roller bearing

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Publication number Priority date Publication date Assignee Title
JPS441601Y1 (en) * 1964-02-04 1969-01-22
JPH03144110A (en) * 1989-09-28 1991-06-19 Nippon Seiko Kk Double row automatic aligning roller bearing
JPH09317760A (en) * 1996-05-30 1997-12-09 Ntn Corp Self-aligning roller bearing
JP2006029539A (en) * 2004-07-21 2006-02-02 Nsk Ltd Self-aligning roller bearing
JP2007127167A (en) * 2005-11-02 2007-05-24 Nsk Ltd Self-aligning roller bearing with retainer
JP2007303608A (en) * 2006-05-12 2007-11-22 Nsk Ltd Double-row roller bearing with cage
JP2010025191A (en) * 2008-07-17 2010-02-04 Nsk Ltd Self-aligning roller bearing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108999887A (en) * 2018-08-22 2018-12-14 大连国威轴承股份有限公司 A kind of precision self-aligning roller bearing

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