JP2015017710A - Synthetic resin retainer and ball bearing - Google Patents

Synthetic resin retainer and ball bearing Download PDF

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Publication number
JP2015017710A
JP2015017710A JP2014221078A JP2014221078A JP2015017710A JP 2015017710 A JP2015017710 A JP 2015017710A JP 2014221078 A JP2014221078 A JP 2014221078A JP 2014221078 A JP2014221078 A JP 2014221078A JP 2015017710 A JP2015017710 A JP 2015017710A
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Prior art keywords
pocket
cage
ball
synthetic resin
corrugated
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JP2014221078A
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Japanese (ja)
Inventor
石田　光
Hikari Ishida
光 石田
勉 眞岩
Tsutomu Maiwa
勉 眞岩
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2014221078A priority Critical patent/JP2015017710A/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
    • F16C33/38—Ball cages
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3862—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together
    • F16C33/3875—Massive or moulded cages having cage pockets surrounding the balls, 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
    • F16C33/38—Ball cages
    • F16C33/3887—Details of individual pockets, e.g. shape or ball 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin retainer whose pocket gap never becomes too small even when two wave-shaped retainer half bodies with deviation of the equal interval arrangement of pocket parts and coupling plate parts are combined together.SOLUTION: Two wave-shaped retainer half bodies 41a, 41b made of two sheets of synthetic resin have a plurality of pocket parts 42 formed at equal intervals in a circumferential direction; a coupling plate part 43 formed between the pocket parts 42 has an engagement hole 44 and an engagement claw 45 formed thereon; and the engagement claw 45 is engaged with the engagement hole 44 so as to couple the pair of wave-shaped retainer half bodies 41a, 41b with each other. A pair of opposed horns 50 are provided at both ends of an opening part of the pocket part 42 of the one wave-shaped retainer half body 41a, and cut parts 51 in which the horns 50 are accommodated are provided at both ends of an opening part of the pocket part 42 of the other wave-shaped retainer half body 41b. The radius of a spherical inner surface of the pocket part 42 where the cut parts 51 are formed is made larger than the radius of a spherical inner surface of the horned pocket part 42, and a ball 31 is retained by the horned pocket part 42.

Description

この発明は、ボールを保持する合成樹脂製保持器およびその保持器が組み込まれた玉軸受に関する。   The present invention relates to a synthetic resin cage for holding a ball and a ball bearing incorporating the cage.

電動モータの回転軸のように、高速回転される回転軸を回転自在に支持する高速回転用玉軸受には、発熱を抑制する目的等から合成樹脂製保持器が一般的に採用されている。   Synthetic resin cages are generally employed for high-speed rotating ball bearings that rotatably support a rotating shaft that rotates at high speed, such as a rotating shaft of an electric motor, for the purpose of suppressing heat generation.

高速回転用玉軸受の合成樹脂製保持器として、特許文献１に記載されたものが従来から知られている。この保持器においては、図６に示すように、複数の半球状ポケット部７１が周方向に等間隔に形成され、隣接するポケット部７１間に形成された結合板部７２のそれぞれに係合孔７３と係合爪７４が形成された２枚の同一形状とされた波形保持器半体７０を、係合孔７３に対する係合爪７４の係合によって互いに連結して、対向するポケット部７１間にボール７５を収容するポケット７１ａを形成するようにしている。   As a synthetic resin cage for a ball bearing for high-speed rotation, a cage described in Patent Document 1 has been conventionally known. In this cage, as shown in FIG. 6, a plurality of hemispherical pocket portions 71 are formed at equal intervals in the circumferential direction, and each of the coupling plate portions 72 formed between the adjacent pocket portions 71 has an engagement hole. The two corrugated cage halves 70 having the same shape formed with the engaging claw 74 and the engaging claw 74 are connected to each other by the engagement of the engaging claw 74 with respect to the engaging hole 73, and between the opposing pocket portions 71. A pocket 71a for accommodating the ball 75 is formed in the inner wall.

特開２００６−２２６４４８号公報JP 2006-226448 A

ところで、上記従来の合成樹脂製保持器においては、ポケット部７１および結合板部７２のそれぞれが等間隔の配置とされているが、成形後の熱収縮量の相違によってポケット部７１および結合板部７２の等間隔の配置にずれが生じる場合があり、その配置にずれがある波形保持器半体７０が組み合わせされて保持器が形成される場合がる。   By the way, in the conventional synthetic resin cage, the pocket portion 71 and the coupling plate portion 72 are arranged at equal intervals, but the pocket portion 71 and the coupling plate portion are different due to the difference in the amount of heat shrinkage after molding. There may be a deviation in the arrangement of 72 at equal intervals, and the holder may be formed by combining the waveform holder halves 70 having a deviation in the arrangement.

このとき、図６に示すように、軸方向で対向する一対の半球状ポケット部７１の球形内面７１ａに周方向の位相ずれδが生じ、ボール７５が本来接触する箇所で接触しなかったり、ポケット隙間が過小となって、ボール７５との接触により異常に発熱し、あるいは、回転時のトルク損失が多くなって円滑に回転させることができなくなる。   At this time, as shown in FIG. 6, a circumferential phase shift δ occurs on the spherical inner surface 71a of the pair of hemispherical pocket portions 71 facing in the axial direction, and the ball 75 does not contact at the place where it originally contacts, The gap becomes too small and abnormal heat is generated due to contact with the ball 75, or torque loss during rotation increases, making it impossible to rotate smoothly.

この発明の課題は、ポケット部と結合板部の等間隔の配置にずれがある２枚の波形保持器半体が組み合わせされた場合でも、ポケット隙間が過小となるようなことがない合成樹脂製保持器および玉軸受を提供することである。   The problem of the present invention is that the pocket gap is not excessively small even when two corrugated cage halves having a gap in the equidistant arrangement between the pocket portion and the coupling plate portion are combined. It is to provide a cage and a ball bearing.

上記の課題を解決するために、この発明に係る合成樹脂製保持器においては、複数の半球状のポケット部が周方向に等間隔に設けられ、隣接するポケット部間に形成された結合板部のそれぞれに係合孔と係合爪とが形成された２枚の合成樹脂製の波形保持器半体からなり、前記係合孔に対する係合爪の係合により２枚の波形保持器半体を互いに結合して、軸方向で対向する一対のポケット部間にボール収容用のポケットを形成する玉軸受用の合成樹脂製保持器において、前記２枚の波形保持器半体のうち、一方の波形保持器半体における半球状ポケット部の保持器突合せ面での開口部の両端に対向一対のつのを、その半球状ポケット部の球形内面に延長するようにして設け、他方の波形保持器半体におけるポケット部の保持器突合せ面での開口部の両端に、前記つのが収容される切欠部を形成し、前記つの付きポケット部でボールを保持するようにした構成を採用したのである。   In order to solve the above-mentioned problems, in the synthetic resin cage according to the present invention, a plurality of hemispherical pocket portions are provided at equal intervals in the circumferential direction, and a coupling plate portion formed between adjacent pocket portions. Two corrugated cage halves made of synthetic resin, each of which has an engagement hole and an engaging claw, and the two corrugated cage halves are formed by engaging the engaging claw with the engaging hole. In a synthetic resin cage for ball bearings that form a ball receiving pocket between a pair of axially opposed pocket portions, one of the two corrugated cage halves. In the corrugated cage half, a pair of opposed ones are provided at both ends of the opening at the abutting surface of the hemispherical pocket portion so as to extend to the spherical inner surface of the hemispherical pocket portion, and the other corrugated cage half Open the pocket on the butt face of the body Both ends of parts, said one of forming a notch to be accommodated, it had adopted a configuration which is adapted to hold the ball in the one per pocket.

また、この発明においては、切欠部が形成されたポケット部の球形内面の半径を前記つの付きポケット部の球形内面の半径より大径としている。   In the present invention, the radius of the spherical inner surface of the pocket portion in which the notch portion is formed is larger than the radius of the spherical inner surface of the two pocket portions.

また、この発明に係る玉軸受においては、外輪と内輪間にボールと、そのボールを保持する保持器とを組込んだ玉軸受において、前記保持器として、この発明に係る上記合成樹脂製保持器を採用する構成としたのである。   Further, in the ball bearing according to the present invention, in the ball bearing in which a ball and a cage for holding the ball are incorporated between the outer ring and the inner ring, the cage made of the synthetic resin according to the present invention is used as the cage. It was set as the structure which employs.

この発明に係る合成樹脂製保持器においては、上記のように、軸方向で対向する一対の半球状ポケット部の相互において、一方のポケット部の保持器突合せ面での開口部における両端に対向一対のつのを設け、他方のポケット部の保持器突合せ面での開口部の両端部に、上記つのが収容される切欠部を形成し、その切欠部が形成されたポケット部の球形内面の半径をつの付きポケット部の球形内面の半径より大径として、つの付きポケット部でボールを保持するようにしたことにより、ポケット部と結合板部の等間隔の配置にずれがある２枚の波形保持器半体の組み合わせによって対向一対のポケット部間に周方向で位相ずれが発生しても、つの付きポケット部の内面とボール間に一定大きさのポケット隙間が確保されることになってポケット隙間が過小になるというようなことがない。   In the synthetic resin cage according to the present invention, as described above, in the pair of hemispherical pocket portions facing each other in the axial direction, a pair of opposed opposing ends at the opening portion of the cage butting surface of one pocket portion. Is formed at both ends of the opening of the other pocket portion at the abutting surface of the cage, and a notch for accommodating the above is formed, and the radius of the spherical inner surface of the pocket portion where the notch is formed is determined. Two corrugated cages that have a larger gap than the radius of the spherical inner surface of the two pockets, and hold the ball in the pockets with two pockets, resulting in deviations in the equidistant arrangement between the pockets and the coupling plate Even if a phase shift occurs in the circumferential direction between a pair of opposing pockets due to the combination of the half bodies, a pocket gap of a certain size is secured between the inner surface of the pocket with the two pockets and the ball. There is no such thing as that become too small gap.

このため、異常な発熱を抑制し、損失トルクの低減を図り、玉軸受を円滑に回転させることができる。   For this reason, abnormal heat generation can be suppressed, loss torque can be reduced, and the ball bearing can be smoothly rotated.

この発明に係る合成樹脂保持器において、２枚の波形保持器半体のそれぞれを、開口部の両端につのを有するつの付きポケット部と開口部の両端に切欠部を有する切欠部付きポケット部とを周方向に交互に設けた構成とすると、２枚の波形保持器半体を同一の形状とすることができるため、一種類の成形用金型によって２枚の波形保持器半体を成形することができ、コストの低減を図ることができる。   In the synthetic resin retainer according to the present invention, each of the two corrugated retainer halves is provided with a pocket portion having one at both ends of the opening and a pocket portion with a notch having notches at both ends of the opening. Since the two corrugated cage halves can have the same shape, the two corrugated cage halves are formed by one type of molding die. And cost can be reduced.

この発明に係る玉軸受において、ボールをセラミックスとすると、保持器に対するボールの衝突力を低減し、保持器の損傷防止に効果を挙げることができる。   In the ball bearing according to the present invention, if the ball is made of ceramic, the impact force of the ball against the cage can be reduced, and the effect of preventing damage to the cage can be obtained.

この発明においては、上記のように、ポケット部と結合板部の等間隔の配置にずれがある２枚の波形保持器半体の組み合わせによって対向一対のポケット部間に周方向で位相ずれが発生しても、つの付きポケット部の内面とボール間に一定大きさのポケット隙間が確保されることになってポケット隙間が過小になるというようなことがないため、異常な発熱を抑制し、損失トルクの低減を図り、玉軸受を円滑に回転させることができる。   In the present invention, as described above, a phase shift occurs in the circumferential direction between a pair of opposed pocket portions by the combination of two corrugated cage halves having a shift in the equidistant arrangement between the pocket portion and the coupling plate portion. However, since a pocket gap of a certain size is secured between the inner surface of the pocket with one pocket and the ball, the pocket gap does not become too small. The torque can be reduced and the ball bearing can be rotated smoothly.

また、対向一対のつのは他方の波形保持器半体のポケット部に形成された切欠部内に収容されているため、つのが周方向に変形するようなことがなく、つの付きポケット部によってボールを確実に保持することができ、ボールの脱落を確実に防止することができる。   In addition, since the pair of opposed ones is housed in a notch formed in the pocket portion of the other corrugated cage half, the two do not deform in the circumferential direction. The ball can be securely held and the ball can be reliably prevented from falling off.

この発明に係る玉軸受の縦断面図Vertical sectional view of the ball bearing according to the present invention 図１に示す保持器の側面図Side view of the cage shown in FIG. ２枚の波形保持器半体を結合して形成された保持器の一部分を示す断面図Sectional drawing which shows a part of retainer formed by combining two corrugated retainer halves 図３の一部を拡大した状態の断面図Sectional drawing of the state which expanded a part of FIG. ２枚の波形保持器半体の結合前の状態を示す断面図Sectional drawing which shows the state before the coupling | bonding of two corrugated cage halves 従来の保持器を示す断面図Sectional view showing a conventional cage

図１に示すように、玉軸受は、外輪１１と、内輪２１と、その外輪１１と内輪２１間に組み込まれたボール３１およびそのボール３１を保持する保持器４０を有し、上記外輪１１と内輪２１の対向面間に形成された軸受空間の両端開口部は、シール部材６０の組込みによって密閉されている。   As shown in FIG. 1, the ball bearing includes an outer ring 11, an inner ring 21, a ball 31 incorporated between the outer ring 11 and the inner ring 21, and a cage 40 that holds the ball 31. Both end openings of the bearing space formed between the opposing surfaces of the inner ring 21 are sealed by the incorporation of the seal member 60.

ここで、外輪１１は、内径面に軌道溝１２を有し、一方、内輪２１は外径面に軌道溝２２を有し、その両軌道溝１２、２２間にボール３１が組み込まれている。   Here, the outer ring 11 has a raceway groove 12 on the inner diameter surface, while the inner ring 21 has a raceway groove 22 on the outer diameter surface, and a ball 31 is incorporated between both the raceway grooves 12 and 22.

図５に示すように、保持器４０は、２枚の合成樹脂製の波形保持器半体４１ａ、４１ｂからなる。図２乃至図４に示すように、波形保持器半体４１ａ、４１ｂは、周方向に等間隔に形成された複数の半球状のポケット部４２を有し、隣接するポケット部４２間に帯板状の結合板部４３が形成されている。   As shown in FIG. 5, the cage 40 includes two synthetic resin corrugated cage halves 41a and 41b. As shown in FIGS. 2 to 4, the corrugated cage halves 41 a and 41 b have a plurality of hemispherical pocket portions 42 formed at equal intervals in the circumferential direction, and a band plate between the adjacent pocket portions 42. A connecting plate portion 43 is formed.

結合板部４３には、両側面に貫通する角形の係合孔４４が形成されている。また、結合板部４３には、他方の波形保持器半体４１ａ、４１ｂの結合板部４３に形成された係合孔４４に挿入される係合爪４５が形成されている。   The coupling plate portion 43 is formed with a rectangular engagement hole 44 that penetrates both side surfaces. Further, the coupling plate portion 43 is formed with an engaging claw 45 to be inserted into the engagement hole 44 formed in the coupling plate portion 43 of the other corrugated cage halves 41a and 41b.

係合孔４４および係合爪４５のそれぞれは、断面が角形とされている。係合爪４５は、その係合孔４４側の一方の端面が係合孔４４の周方向で対向する一方の端面と同一面を形成するようにして設けられおり、その一方の端面の先端部に鈎部４６が形成されている。一方、係合孔４４の一方の端面には、上記鈎部４６が係合可能な係合段部４７が設けられている。   Each of the engagement hole 44 and the engagement claw 45 has a square cross section. The engagement claw 45 is provided so that one end surface on the engagement hole 44 side forms the same surface as one end surface opposed in the circumferential direction of the engagement hole 44, and the tip end portion of the one end surface A flange 46 is formed on the top. On the other hand, on one end face of the engagement hole 44, an engagement step portion 47 that can engage with the flange portion 46 is provided.

２枚の波形保持器半体４１ａ、４１ｂは、係合孔４４に係合爪４５が挿入される組み合わせとされ、係合段部４７に対する鈎部４６の係合によって結合状態とされる。その結合によって保持器４０が形成され、軸方向で対向する一対の半球状のポケット部４２間に、図４に示すように、ボール３１を収容するポケット４８が形成される。   The two corrugated cage halves 41 a and 41 b are combined such that the engaging claw 45 is inserted into the engaging hole 44, and are brought into a coupled state by the engagement of the flange 46 with the engaging step 47. A cage 40 is formed by the coupling, and a pocket 48 for accommodating the ball 31 is formed between a pair of hemispherical pocket portions 42 opposed in the axial direction, as shown in FIG.

ポケット４８を形成する対向一対のポケット部４２において、一方のポケット部４２の保持器突合せ面での開口部における両端には対向一対のつの５０が、ポケット部４２の球形内面に延長するようして設けられ、他方のポケット部４２の保持器突合せ面での開口部における両端には、上記つの５０が収容される切欠部５１が設けられている。   In the pair of opposed pocket portions 42 forming the pocket 48, a pair of opposed 50 is extended to the spherical inner surface of the pocket portion 42 at both ends of the opening of the one pocket portion 42 at the abutting surface of the cage. Provided at both ends of the opening portion of the other pocket portion 42 at the abutting surface of the cage are cutout portions 51 in which the 50 is accommodated.

図５に示すように、一対の波形保持器半体４１ａ、４１ｂにおいては、つの付きポケット部４２と切欠部付きポケット部４２が周方向に交互に設けられた構成とされ、その切欠部付きポケット部４２の球形内面の半径φ１は、つの付きポケット部４２の球形内面の半径φ２より大径とされ、上記つの付きポケット部４２でボール３１を保持し、切欠部付きポケット部４２は、つの５０の周方向への変形を防止して、つの付きポケット部４２からボール３１が脱落するのを防止するようになっている。 As shown in FIG. 5, the pair of corrugated cage halves 41a and 41b has a configuration in which two pocket portions 42 and pocket portions 42 with notches are alternately provided in the circumferential direction. The radius φ 1 of the spherical inner surface of the portion 42 is larger than the radius φ 2 of the spherical inner surface of the two pocket portions 42, the ball 31 is held by the two pocket portions 42, The deformation of the two 50 in the circumferential direction is prevented, and the ball 31 is prevented from dropping out of the two pocket portions 42.

一対の波形保持器半体４１ａ、４１ｂは、つの付きポケット部４２が相手方波形保持器半体の切欠部付きポケット部４２と対向する組み合わせとされ、係合孔４４に対する係合爪４５の係合により結合されて保持器４０を形成する。   The pair of corrugated cage halves 41a and 41b is a combination in which the one pocket portion 42 is opposed to the notched pocket portion 42 of the counterpart corrugated cage half, and the engagement claw 45 is engaged with the engagement hole 44. To form a retainer 40.

上記のように、軸方向で対向する一対の半球状ポケット部４２の相互において、一方のポケット部４２の保持器突合せ面での開口部における両端に対向一対のつの５０を設け、他方のポケット部４２の保持器突合せ面での開口部の両端部に、上記つの５０が収容される切欠部５１を形成し、その切欠部５１が形成されたポケット部４２の球形内面の半径φ１をつの付きポケット部４２の球形内面の半径φ２より大径として、つの付きポケット部４２でボール３１を保持することにより、ポケット部４２と結合板部４３の等間隔の配置にずれがある２枚の波形保持器半体４１ａ、４１ｂの組み合わせによって対向一対のポケット部４２間に周方向で位相ずれが発生しても、つの付きポケット部４２の内面とボール３１間に一定大きさのポケット隙間が確保されることになる。図４に示すｇは、そのポケット隙間を示している。 As described above, in the pair of hemispherical pocket portions 42 facing each other in the axial direction, a pair of facing 50 is provided at both ends of the opening portion of the one pocket portion 42 on the retainer abutting surface, and the other pocket portion is provided. at both ends of the opening in the retainer abutting surfaces 42, to form a notch 51 in which the one 50 is accommodated, with horns radius phi 1 spherical inner surface of the pocket portion 42 that notch 51 is formed Two waveforms having a deviation in the arrangement of the pocket portion 42 and the coupling plate portion 43 at equal intervals by holding the ball 31 by the two pocket portions 42 with a larger diameter than the radius φ 2 of the spherical inner surface of the pocket portion 42. Even if a phase shift occurs in the circumferential direction between the pair of opposed pocket portions 42 due to the combination of the cage halves 41a and 41b, a pocket of a certain size between the inner surface of the two pocket portions 42 and the ball 31 During so that is ensured. “G” shown in FIG. 4 indicates the pocket gap.

ここで、切欠部５１を有するポケット部４２の球形内面の半径φ１は、上記のように、つの付きポケット部４２の球形内面の半径φ２より大径とされているため、切欠部５１を有するポケット部４２の球形内面とボール３１間もポケット隙間が確保されることになって、その球形内面がボール３１と接触するようなことはない。このため、異常な発熱を抑制することができると共に、トルク損失の低減を図り、玉軸受を円滑に回転させることができる。 Here, the radius φ 1 of the spherical inner surface of the pocket portion 42 having the notch portion 51 is larger than the radius φ 2 of the spherical inner surface of the two pocket portions 42 as described above. A pocket clearance is also secured between the spherical inner surface of the pocket portion 42 and the ball 31, so that the spherical inner surface does not come into contact with the ball 31. Therefore, abnormal heat generation can be suppressed, torque loss can be reduced, and the ball bearing can be smoothly rotated.

実施の形態では、一対の波形保持器半体４１ａ、４１ｂのそれぞれを開口部の両端につの５０を有するつの付きポケット部４２と、開口部の両端に切欠部５１を有する切欠部付きポケット部４２とを周方向に交互に設けた構成としているが、一対の波形保持器半体４１ａ、４１ｂの一方に複数のつの付きポケット部４２を設け、他方に複数の切欠部付きポケット部４２を設けるようにしてもよい。   In the embodiment, each of the pair of corrugated cage halves 41a and 41b is provided with a pocket portion 42 having 50 at both ends of the opening portion, and a pocket portion 42 with a notch portion having cutout portions 51 at both ends of the opening portion. Are alternately provided in the circumferential direction, but a plurality of pocket portions 42 are provided in one of the pair of corrugated cage halves 41a and 41b, and a plurality of pocket portions 42 with notches are provided in the other. It may be.

実施の形態で示すように、一対の波形保持器半体４１ａ、４１ｂのそれぞれを開口部の両端につの５０を有するつの付きポケット部４２と、開口部の両端に切欠部５１を有する切欠部付きポケット部４２とを周方向に交互に設けた構成とすると、２枚の波形保持器半体４１ａ、４１ｂを同一の形状とすることができるため、一種類の成形用金型によって２枚の波形保持器半体４１ａ、４１ｂを成形することができ、コストの低減を図ることができる。   As shown in the embodiment, each of the pair of corrugated cage halves 41a and 41b is provided with two pocket portions 42 having 50 at both ends of the opening, and with notches having notches 51 at both ends of the opening. When the pocket portions 42 are alternately provided in the circumferential direction, the two corrugated cage halves 41a and 41b can have the same shape, so that two corrugations can be formed by one type of molding die. The cage halves 41a and 41b can be molded, and the cost can be reduced.

図１に示す玉軸受において、ボール３１は鋼製のものであってもよく、あるいは、セラミックス製のものであってもよい。セラミックス製とすると、保持器４０に対するボール３１の衝突力を低減し、保持器４０の損傷防止に効果を挙げることができる。   In the ball bearing shown in FIG. 1, the balls 31 may be made of steel or ceramics. When made of ceramics, the impact force of the ball 31 against the cage 40 can be reduced, and the effect of preventing damage to the cage 40 can be obtained.

１１ 外輪
２１ 内輪
３１ ボール
４０ 保持器
４１ａ、４１ｂ 波形保持器半体
４２ ポケット部
４３ 結合板部
４４ 係合孔
４５ 係合爪
４８ ポケット
５０ つの
５１ 切欠部 11 outer ring 21 inner ring 31 ball 40 cage 41a, 41b corrugated cage half 42 pocket part 43 coupling plate part 44 engagement hole 45 engagement claw 48 pocket 50 51 51 notch

Claims (4)

複数の半球状のポケット部が周方向に等間隔に設けられ、隣接するポケット部間に形成された結合板部のそれぞれに係合孔と係合爪とが形成された２枚の合成樹脂製の波形保持器半体からなり、前記係合孔に対する係合爪の係合により２枚の波形保持器半体を互いに結合して、軸方向で対向する一対のポケット部間にボール収容用のポケットを形成する玉軸受用の合成樹脂製保持器において、
前記２枚の波形保持器半体のうち、一方の波形保持器半体における半球状ポケット部の保持器突合せ面での開口部の両端に対向一対のつのを、その半球状ポケット部の球形内面に延長するようにして設け、他方の波形保持器半体におけるポケット部の保持器突合せ面での開口部の両端に、前記つのが収容される切欠部を形成し、前記つの付きポケット部でボールを保持するようにしたことを特徴とする玉軸受用の合成樹脂製保持器。 Made of two synthetic resins in which a plurality of hemispherical pocket portions are provided at equal intervals in the circumferential direction, and an engagement hole and an engagement claw are formed in each of the coupling plate portions formed between adjacent pocket portions The two corrugated cage halves are coupled to each other by engagement of the engaging claws with the engaging holes, and are used for ball accommodation between a pair of axially opposed pocket portions. In a synthetic resin cage for ball bearings that form a pocket,
Of the two corrugated cage halves, a pair of opposing ones at both ends of the opening in the cage abutting surface of the hemispherical pocket portion in one corrugated cage half is the spherical inner surface of the hemispherical pocket portion. In the other half of the corrugated cage half, a notch for accommodating the one is formed at both ends of the opening at the butt-matching surface of the pocket in the other corrugated cage half. A synthetic resin cage for ball bearings characterized by holding 前記切欠部が形成されたポケット部の球形内面の半径を前記つの付きポケット部の球形内面の半径より大径とした請求項１に記載の合成樹脂製保持器。   The synthetic resin cage according to claim 1, wherein the radius of the spherical inner surface of the pocket portion in which the notch portion is formed is larger than the radius of the spherical inner surface of the two pocket portions. 外輪と内輪間にボールと、そのボールを保持する保持器とを組込んだ玉軸受において、
前記保持器が請求項１又は２に記載の合成樹脂製保持器からなることを特徴とする玉軸受。 In ball bearings incorporating a ball and a cage for holding the ball between the outer ring and the inner ring,
A ball bearing, wherein the cage comprises the synthetic resin cage according to claim 1. 前記ボールが、セラミックスからなる請求項３に記載の玉軸受。   The ball bearing according to claim 3, wherein the ball is made of ceramics.
JP2014221078A 2014-10-30 2014-10-30 Synthetic resin retainer and ball bearing Pending JP2015017710A (en)

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KR100632475B1 (en) * 2004-07-26 2006-10-09 삼성전자주식회사 Method for manufacturing multi-gate transistor with improved performance and multi-gate transistor manufactured by
CN104728305A (en) * 2015-04-09 2015-06-24 无锡华洋滚动轴承有限公司 Double-wedge sealed buckled type reverse stop bearing
US11118626B2 (en) * 2020-01-24 2021-09-14 Schaeffler Technologies AG & Co. KG Multi-part bearing cage assembly
IT202000024403A1 (en) * 2020-10-16 2022-04-16 Skf Ab BEARING UNIT EQUIPPED WITH HIGH PERFORMANCE RETENTION DEVICE
WO2022186094A1 (en) * 2021-03-05 2022-09-09 Ntn株式会社 Rolling bearing and cage for rolling bearing

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JP2005180666A (en) * 2003-12-24 2005-07-07 Ntn Corp Ball bearing cage and its ball bearing
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JP2011256963A (en) * 2010-06-10 2011-12-22 Ntn Corp Ball bearing holder and ball bearing

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FR2308013A1 (en) * 1975-04-18 1976-11-12 Ina Roulements Sa Ball race bearings with snap fit (polyamide) cages - so the cages inhibit axial track displacement
JPS60227014A (en) * 1984-04-04 1985-11-12 エス・ケー・エフ（ユー・ケー）・リミテツド Ball holder for radial ball bearing
JPH061848U (en) * 1992-06-12 1994-01-14 エヌティエヌ株式会社 Synthetic resin cage
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100632475B1 (en) * 2004-07-26 2006-10-09 삼성전자주식회사 Method for manufacturing multi-gate transistor with improved performance and multi-gate transistor manufactured by
CN104728305A (en) * 2015-04-09 2015-06-24 无锡华洋滚动轴承有限公司 Double-wedge sealed buckled type reverse stop bearing
US11118626B2 (en) * 2020-01-24 2021-09-14 Schaeffler Technologies AG & Co. KG Multi-part bearing cage assembly
IT202000024403A1 (en) * 2020-10-16 2022-04-16 Skf Ab BEARING UNIT EQUIPPED WITH HIGH PERFORMANCE RETENTION DEVICE
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WO2022186094A1 (en) * 2021-03-05 2022-09-09 Ntn株式会社 Rolling bearing and cage for rolling bearing

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