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JP2014029174A - Split cage - Google Patents

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Publication number
JP2014029174A
JP2014029174A JP2012169700A JP2012169700A JP2014029174A JP 2014029174 A JP2014029174 A JP 2014029174A JP 2012169700 A JP2012169700 A JP 2012169700A JP 2012169700 A JP2012169700 A JP 2012169700A JP 2014029174 A JP2014029174 A JP 2014029174A
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Japan
Prior art keywords
cage
connecting portion
convex
segment
concave
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Pending
Application number
JP2012169700A
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Japanese (ja)
Inventor
Tomoaki Sakase
友章 坂瀬
Yasushi Tamaki
康 玉城
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NSK Ltd
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NSK Ltd
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Priority to JP2012169700A priority Critical patent/JP2014029174A/en
Publication of JP2014029174A publication Critical patent/JP2014029174A/en
Pending legal-status Critical Current

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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
    • F16C33/38—Ball cages
    • F16C33/3812—Ball cages formed of interconnected segments, e.g. chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2316/00—Apparatus in health or amusement
    • F16C2316/10—Apparatus in health or amusement in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances
    • 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
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators

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

Abstract

【課題】保持器の円周方向の膨張収縮に対して真円度を維持し、異音の発生を抑制する分割型保持器を提供する。
【解決手段】内輪と外輪間に配置された転動体を保持する複数のポケットが設けられたセグメント２を複数連結するとともに、前記セグメント両端に設けた連結部３によって環状に連結した保持器であって、前記連結部３は、前記保持器の円周方向のみのスライドを許容するように連結する。前記一対の連結部は、前記セグメント端面に設けられた凸状連結部３ｂと凹状連結部３ａであって、前記凸状連結部３ｂに設けられた凹溝状ガイド３ｄと、前記凹状連結部３ａに設けられた凸状レール３ｃとが嵌合されている。凸条レール３ｃの摺動面には玉よりなる転動体５が埋め込まれているため連結部３のスライドによる異音を抑制出来る。
【選択図】図２The present invention provides a split cage that maintains roundness against expansion and contraction in the circumferential direction of the cage and suppresses the generation of abnormal noise.
A cage in which a plurality of segments (2) provided with a plurality of pockets for holding rolling elements arranged between an inner ring and an outer ring are connected together and connected in a ring shape by connecting portions (3) provided at both ends of the segment. Thus, the connecting portion 3 is connected so as to allow the cage to slide only in the circumferential direction. The pair of connecting portions are a convex connecting portion 3b and a concave connecting portion 3a provided on the segment end face, and a concave groove-like guide 3d provided on the convex connecting portion 3b and the concave connecting portion 3a. Is fitted to the convex rail 3c. Since the rolling elements 5 made of balls are embedded in the sliding surface of the ridge rail 3c, abnormal noise due to the sliding of the connecting portion 3 can be suppressed.
[Selection] Figure 2

Description

本発明は、ＣＴスキャナー、ロボット、および工作機械用の大径、かつ、薄肉の転がり軸受の分割型保持器に関する。   The present invention relates to a split type cage of a large-diameter and thin-walled rolling bearing for CT scanners, robots, and machine tools.

従来より、ＣＴスキャナーなどに用いる大径薄肉の転がり軸受においては、一体型保持器の課題である真円度の悪化と、保持器の製造金型の大型化を避けるため、帯状のセグメントを円環状に複数配置した分割型保持器を採用している。例えば、図５に示す従来の分割型保持器は、セグメント１１の長手方向端面の一部から延長して延びる突出部１２と、突出部１２から連続してセグメント１１の幅方向に延びる係合部６３とを有する連結部１４によって、隣接する他のセグメント１１の連結部１４を連結してセグメント１１を円環状に接続し、保持器の分離を防止している（特許文献１参照）。   Conventionally, in large-diameter and thin-walled rolling bearings used for CT scanners, etc., in order to avoid the deterioration of roundness, which is a problem with integrated cages, and to increase the size of the cage manufacturing die, A plurality of split cages arranged in an annular shape are adopted. For example, the conventional split type retainer shown in FIG. 5 includes a protruding portion 12 extending from a part of the longitudinal end face of the segment 11 and an engaging portion extending continuously from the protruding portion 12 in the width direction of the segment 11. 63, the connecting portions 14 of other adjacent segments 11 are connected to connect the segments 11 in an annular shape to prevent the cage from being separated (see Patent Document 1).

特開２０００−６５０６７号公報JP 2000-65067 A

しかしながら、特許文献１においては、熱や湿度の変動環境下などにおける保持器の収縮膨張に際してはセグメント幅方向にしか寸法変化の逃げが無いため、保持器の真円度が悪化する虞があった。また、連結部が嵌合構造を採用しているため、保持器の膨張収縮の際には、セグメント同士の摩擦により異音が発生する可能性があった。   However, in Patent Document 1, since the dimensional change escapes only in the segment width direction at the time of contraction and expansion of the cage under a change environment of heat or humidity, the roundness of the cage may be deteriorated. . Moreover, since the connection part employ | adopted the fitting structure, in the case of expansion | swelling and shrinkage | contraction of a holder | retainer, there existed a possibility that noise may generate | occur | produce by the friction of segments.

本発明は、このような問題点に鑑みてなされたもので、その目的とするところは、保持器の膨張収縮に対して真円度を維持して異音の発生を抑制する分割型保持器を提供することにある。   The present invention has been made in view of such problems, and an object of the present invention is to provide a split cage that maintains the roundness against the expansion and contraction of the cage and suppresses the generation of abnormal noise. Is to provide.

本発明の分割型保持器は、内輪と外輪間に配置された転動体を保持する複数のポケットが設けられたセグメントを複数連結するとともに、前記セグメント両端に設けた連結部によって環状に連結した保持器であって、前記連結部は、前記保持器の円周方向のみのスライドを許容するように連結していることを特徴とする。   The split type retainer of the present invention connects a plurality of segments provided with a plurality of pockets for holding rolling elements arranged between an inner ring and an outer ring, and holds them connected in an annular shape by connecting portions provided at both ends of the segments. It is a container, Comprising: The said connection part is connected so that the sliding of only the circumferential direction of the said holder | retainer is permitted.

また、第二の発明は、前記一対の連結部は、前記セグメント端面に設けられた凸部と凹部であって、前記凸部に設けられた凹溝状ガイドと、前記凹部に設けられた凸状レールとが嵌合されていることを特徴とする。   According to a second aspect of the present invention, the pair of connecting portions includes a convex portion and a concave portion provided on the segment end surface, and a concave groove-like guide provided on the convex portion and a convex portion provided on the concave portion. It is characterized by being fitted with a rail.

また、第三の発明は、前記凹溝状ガイドと前記凸状レールの摺動面の一方に転動体を組込んだことを特徴とする。   The third invention is characterized in that a rolling element is incorporated in one of the sliding surfaces of the concave groove guide and the convex rail.

本発明によれば、保持器の膨張収縮に対して真円度を維持し異音の発生を抑制する分割型保持器を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the division | segmentation type | mold holder | retainer which maintains roundness with respect to the expansion / contraction of a holder | retainer and suppresses generation | occurrence | production of unusual noise can be provided.

本発明の分割型保持器を示す図である。It is a figure which shows the split type holder | retainer of this invention. 本発明の第一実施形態の分割型保持器のセグメントの要部を示す図である。It is a figure which shows the principal part of the segment of the split type holder | retainer of 1st embodiment of this invention. 本発明の第二実施形態の分割型保持器のセグメントの要部を示す図である。It is a figure which shows the principal part of the segment of the split type holder | retainer of 2nd embodiment of this invention. 本発明の第一実施形態のセグメントの摺動面の断面図である。It is sectional drawing of the sliding surface of the segment of 1st embodiment of this invention. 従来の分割型保持器のセグメントの要部を示す図である。It is a figure which shows the principal part of the segment of the conventional split type holder.

図２は本発明の第一の実施形態を示す図である。図１及び図２に示すように、複数の帯状セグメント２の保持器円周方向両端に設けられた連結部３を互いに連結して円環状の分割型保持器１が形成される。セグメント２には、長手方向に所定間隔でボールを保持する複数のポケット４が設けられている。前記セグメント２の一端の連結部３は、セグメント中央部に凹状連結部３ａが形成され、セグメント２の他端の連結部３は、セグメント中央部が突出した凸状連結部３ｂが形成されている。これら凹状連結部３ａと凸状連結部３ｂが保持器円周方向のみのスライドを許容して一対で嵌合されている。   FIG. 2 is a diagram showing a first embodiment of the present invention. As shown in FIGS. 1 and 2, connecting portions 3 provided at both ends of the plurality of strip-shaped segments 2 in the circumferential direction of the cage are connected to each other to form an annular split cage 1. The segment 2 is provided with a plurality of pockets 4 for holding balls at predetermined intervals in the longitudinal direction. The connecting portion 3 at one end of the segment 2 is formed with a concave connecting portion 3a at the center of the segment, and the connecting portion 3 at the other end of the segment 2 is formed with a convex connecting portion 3b protruding from the center of the segment. . The concave connection portion 3a and the convex connection portion 3b are fitted in a pair by allowing sliding only in the circumferential direction of the cage.

前記凹状連結部３ａの内周面には、保持器円周方向に沿って凸状レール３ｃが設けられ、前記凸状連結部３ｂの外周面には、保持器円周方向に沿って凹溝状のガイド３ｄが設けられている。これら凸状レール３ｃと凹溝状のガイド３ｄが互いに嵌合し、連結部３のスライドのみを許容している。   Convex rails 3c are provided on the inner peripheral surface of the concave connecting portion 3a along the circumferential direction of the cage, and concave grooves are provided on the outer peripheral surface of the convex connecting portion 3b along the circumferential direction of the cage. A guide 3d is provided. The convex rail 3c and the groove-shaped guide 3d are fitted to each other, and only the sliding of the connecting portion 3 is allowed.

また、前記凸状レール３ｃの摺動面には玉よりなる転動体５が埋め込まれている。摺動面に転動体５を介在させることにより、連結部３のスライドによる異音を抑制でき、円滑なスライド動作を与えることが出来る。   Further, rolling elements 5 made of balls are embedded in the sliding surface of the convex rail 3c. By interposing the rolling elements 5 on the sliding surface, it is possible to suppress abnormal noise due to the sliding of the connecting portion 3 and to provide a smooth sliding operation.

そして、図２、図４の様に、前記凹状連結部３ａの凸状レール３ｃの摺動面３ｋには、玉よりなる転動体５が埋め込まれている。転動体５は前記摺動面３ｋに設けられたポケット３ｇに挿入され、前記ポケット３ｇの円弧断面形状によって抜け止めされている。一旦転動体５をポケット３ｇの掛かり代３ｈを乗り越え、ポケット３ｇ内に挿入すると、転動体５が脱落せずポケット内に保持できる形状になっている。転動体５の一部は摺動面３ｋから突出しているため、このように摺動面３ｋに転動体５を介在させることにより、連結部３のスライドによる異音を抑制でき、円滑なスライド動作を与えることが出来る。ここで用いられる転動体の材質は、特に限定されるものではなく、金属であっても樹脂であってもセグメント２のスライドに寄与するものであれば何でも良い。   As shown in FIGS. 2 and 4, rolling elements 5 made of balls are embedded in the sliding surface 3k of the convex rail 3c of the concave connecting portion 3a. The rolling element 5 is inserted into a pocket 3g provided on the sliding surface 3k, and is prevented from coming off by the arc cross-sectional shape of the pocket 3g. Once the rolling element 5 gets over the hook 3h of the pocket 3g and is inserted into the pocket 3g, the rolling element 5 does not fall off and can be held in the pocket. Since a part of the rolling element 5 protrudes from the sliding surface 3k, by interposing the rolling element 5 on the sliding surface 3k in this way, abnormal noise caused by sliding of the connecting portion 3 can be suppressed, and smooth sliding operation can be achieved. Can be given. The material of the rolling element used here is not particularly limited and may be any metal or resin that contributes to the sliding of the segment 2.

図３は本発明の第二の実施形態を示す図である。連結部を除きその他の部位は第一の実施形態と同じであるので説明を省略する。本実施形態での連結部３は前記セグメント２の一端にセグメント中央部に凹穴状連結部３ｅが形成され、セグメント２の他端の連結部３は、セグメント中央部が突出した凸状連結部３ｆが形成されている。これら凹穴状連結部３ｅと凸状連結部３ｆが保持器円周方向のみのスライドを許容して一対で嵌合されている。   FIG. 3 is a diagram showing a second embodiment of the present invention. Since other parts are the same as those of the first embodiment except for the connecting portion, the description thereof is omitted. The connecting part 3 in this embodiment has a concave connecting part 3e formed at one end of the segment 2 at the center of the segment, and the connecting part 3 at the other end of the segment 2 is a convex connecting part protruding from the center of the segment. 3f is formed. The concave hole-like connecting portion 3e and the convex connecting portion 3f are fitted in a pair by allowing sliding only in the circumferential direction of the cage.

そして、図３様に、前記凸状連結部３ｆには円筒ころよりなる転動体５が埋め込まれている。転動体５の一部は摺動面から突出しているため、このように摺動面に転動体５を介在させることにより、連結部３のスライドによる異音を抑制でき、円滑なスライド動作を与えることが出来る。円筒ころの転動体５の保持も、第一の実施形態と同様に円弧断面のポケットにより抜け止め処理が施されているので、詳細な説明は省略する。ここで用いられる円筒ころの転動体の材質も、特に限定されるものではなく、金属であっても樹脂であってもセグメント２のスライドに寄与するものであれば何でも良い。   As shown in FIG. 3, rolling elements 5 made of cylindrical rollers are embedded in the convex connection portion 3f. Since a part of the rolling element 5 protrudes from the sliding surface, by interposing the rolling element 5 on the sliding surface in this way, abnormal noise due to the sliding of the connecting portion 3 can be suppressed, and a smooth sliding operation is given. I can do it. The holding of the rolling element 5 of the cylindrical roller is also prevented from coming off by a pocket having an arc cross section in the same manner as in the first embodiment, and thus detailed description thereof is omitted. The material of the rolling element of the cylindrical roller used here is not particularly limited, and any material may be used as long as it contributes to the slide of the segment 2 even if it is a metal or a resin.

なお、本発明は、本実施の形態のみに限定されるものではなく、本発明の主旨を逸脱しない範囲で種々の変更が可能であり、前記凸状レールが凸状連結部に設けられ、凹溝状のガイドが凹状連結部に設けられていてもよい。また、セグメントのスライドを円滑に行わせる転動体を凸状レール、凹溝状のガイドのどちらに設けても良いことは言うまでも無い。   The present invention is not limited to the present embodiment, and various modifications can be made without departing from the spirit of the present invention. The convex rail is provided on the convex coupling portion, and the concave A groove-shaped guide may be provided in the concave connection portion. Needless to say, the rolling elements for smoothly sliding the segments may be provided on either the convex rail or the concave groove guide.

１・・・保持器
２・・・セグメント
３・・・連結部
４・・・ポケット
５・・・転動体 DESCRIPTION OF SYMBOLS 1 ... Cage 2 ... Segment 3 ... Connection part 4 ... Pocket 5 ... Rolling body

Claims (3)

内輪と外輪間に配置された転動体を保持する複数のポケットが設けられたセグメントを複数連結するとともに、前記セグメント両端に設けた連結部によって環状に連結した保持器であって、前記連結部は、前記保持器の円周方向のみのスライドを許容するように連結していることを特徴とする分割型保持器。 A retainer that connects a plurality of segments provided with a plurality of pockets for holding rolling elements disposed between an inner ring and an outer ring, and is connected in a ring shape by connecting portions provided at both ends of the segment, The split type cage is connected so as to allow the cage to slide only in the circumferential direction. 前記一対の連結部は、前記セグメント端面に設けられた凸部と凹部であって、前記凸部に設けられた凹溝状ガイドと、前記凹部に設けられた凸状レールとが嵌合されていることを特徴とする請求項１記載の分割型保持器。   The pair of connecting portions is a convex portion and a concave portion provided on the segment end surface, and a concave groove-like guide provided on the convex portion and a convex rail provided on the concave portion are fitted. 2. The split type retainer according to claim 1, wherein: 前記凹溝状ガイドと前記凸状レールの摺動面の一方に転動体を組込んだことを特徴とする請求項１または請求項２記載の分割型保持器。   The split type retainer according to claim 1 or 2, wherein a rolling element is incorporated in one of the sliding surfaces of the concave groove guide and the convex rail.
JP2012169700A 2012-07-31 2012-07-31 Split cage Pending JP2014029174A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089986A (en) * 2016-06-24 2016-11-09 浙江工贸职业技术学院 A kind of high speed ceramic ball bearing and assembly technology thereof
CN111536154A (en) * 2020-04-30 2020-08-14 山东金帝精密机械科技股份有限公司 Machining process of bearing retainer for wind power generation equipment and bearing retainer
CN111536155A (en) * 2020-04-30 2020-08-14 山东金帝精密机械科技股份有限公司 Pitch staggered bearing retainer and processing method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106089986A (en) * 2016-06-24 2016-11-09 浙江工贸职业技术学院 A kind of high speed ceramic ball bearing and assembly technology thereof
CN111536154A (en) * 2020-04-30 2020-08-14 山东金帝精密机械科技股份有限公司 Machining process of bearing retainer for wind power generation equipment and bearing retainer
CN111536155A (en) * 2020-04-30 2020-08-14 山东金帝精密机械科技股份有限公司 Pitch staggered bearing retainer and processing method thereof

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