JP2015194240A

JP2015194240A - Bearing device, manufacturing method of cage, and grip member

Info

Publication number: JP2015194240A
Application number: JP2014195145A
Authority: JP
Inventors: 田邉　晃一; Koichi Tanabe; 晃一田邉
Original assignee: NSK Ltd
Current assignee: NSK Ltd
Priority date: 2014-03-18
Filing date: 2014-09-25
Publication date: 2015-11-05

Abstract

PROBLEM TO BE SOLVED: To provide a bearing device which can be reduced in manufacturing costs.SOLUTION: An angular ball bearing 10 has an outer ring 11, an inner ring 12, a plurality of balls 13 arranged between the outer ring 11 and the inner ring 12, and a cage 14 for holding the plurality of the balls 13. The cage 14 has a large-diameter annular part 14a and a small-diameter annular part 14b, a plurality of column parts 14c for connecting the large-diameter annular part 14a and the small-diameter annular part 14b to each other in an axial direction, and a pocket part 14d which is defined by the large-diameter annular part 14a, the small-diameter annular part 14b, and the column parts 14c which adjoin each other in a circumferential direction, and holds the balls 13. A width b' in an axial direction of an external peripheral face of the large-diameter annular part 14a is 10 to 30% of a width B in an axial direction of the cage 14.

Description

本発明は、軸受装置、保持器の製造方法、及び把持部材に関する。 The present invention relates to a bearing device, a method for manufacturing a cage, and a gripping member.

いわゆるアンギュラ玉軸受は、一つの軸受でラジアル荷重及びアキシャル荷重の両荷重を支持することができるため、ポンプ等の各種機械装置の回転支持部に広く用いられている。アンギュラ玉軸受において、転動体である玉は、１５°〜４０°程度の接触角を持って外輪、内輪間に組み込まれている。一般的に、玉はテーパ円筒状の本体部に複数のポケットが形成された傾斜型保持器や、円環状の主部に複数のポケットを形成した冠型保持器によって回動自在に保持されており、玉の転動面同士の接触を阻止し、接触摩擦に基づく回転抵抗の増大や焼付き等を防止するようになっている（例えば、特許文献１及び２参照。） So-called angular ball bearings are widely used in rotation support portions of various mechanical devices such as pumps because one bearing can support both a radial load and an axial load. In an angular ball bearing, a ball as a rolling element is incorporated between an outer ring and an inner ring with a contact angle of about 15 ° to 40 °. Generally, a ball is rotatably held by a tilted cage having a plurality of pockets formed in a tapered cylindrical main body or a crown type cage having a plurality of pockets formed in an annular main portion. Thus, contact between the rolling surfaces of the balls is prevented, and an increase in rotational resistance or seizure based on contact friction is prevented (see, for example, Patent Documents 1 and 2).

このようなアンギュラ玉軸受は、ポンプの回転支持部に好適に使用される。ポンプ用のアンギュラ玉軸受には、銅合金製のもみ抜き保持器が多く使用され、近年では、軸受の負荷能力向上を目的に玉案内形式が採用されている。 Such an angular ball bearing is suitably used for the rotation support portion of the pump. Many angular contact ball bearings for pumps use a machined cage made of copper alloy, and in recent years, a ball guide type has been adopted for the purpose of improving the load capacity of the bearing.

特開２００７−２９８１８４公報JP 2007-298184 A 特開２００８−３０９１７８公報JP 2008-309178 A

しかしながら、もみ抜き保持器の材料となる銅合金は、鉄や樹脂等の他の材料と比べると非常に高価であるため、製作コストが嵩むことが課題となっていた。 However, since the copper alloy used as the material for the machined cage is very expensive compared to other materials such as iron and resin, an increase in production cost has been a problem.

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、製作コスト低減が可能な軸受装置、保持器の製造方法、及び把持部材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 thereof is to provide a bearing device, a manufacturing method of a cage, and a gripping member that can reduce the manufacturing cost.

本発明の上記目的は、下記の構成により達成される。
（１）外輪と、内輪と、前記外輪及び前記内輪の間に配置された複数の玉と、複数の前記玉を保持する保持器と、を有する軸受装置において、
前記保持器は、大径環状部及び小径環状部と、前記大径環状部及び前記小径環状部を軸方向に連結する複数の柱部と、前記大径環状部及び前記小径環状部と円周方向に隣り合う前記柱部とによって画成され、前記玉をそれぞれ保持する複数のポケット部と、を有し、
前記大径環状部の外周面の軸方向幅は、前記保持器の軸方向幅の１０〜３０％であることを特徴とする軸受装置。
（２）前記大径環状部の外周面の外径は、前記軸受装置の外径の８２〜８９％であることを特徴とする（１）に記載の軸受装置。
（３）外輪と、内輪と、前記外輪及び前記内輪の間に配置された複数の玉と、複数の前記玉を保持する保持器と、を有する軸受装置において、
前記保持器は、大径環状部及び小径環状部と、前記大径環状部及び前記小径環状部を軸方向に連結する複数の柱部と、前記大径環状部及び前記小径環状部と円周方向に隣り合う前記柱部とによって画成され、前記玉を保持するポケット部と、を有し、
前記大径環状部の外周面の外径は、前記軸受装置の外径の８２〜８９％であることを特徴とする軸受装置。
（４）前記保持器の軸方向幅は、前記軸受装置の軸方向幅の９０〜９６％であることを特徴とする（１）〜（３）の何れか１つに記載の軸受装置。
（５）前記保持器の外周面は、前記大径環状部の外周面である外径側円筒面と、前記柱部及び前記小径環状部の外周面である外径側テーパ面と、からなり、
前記保持器の内周面は、前記小径環状部の内周面である内径側円筒面と、前記柱部及び前記大径環状部の内周面である内径側テーパ面と、からなることを特徴とする（１）〜（４）の何れか１つに記載の軸受装置。
（６）軸方向一端側に配置された大径環状部と、軸方向他端側に配置された小径環状部と、前記大径環状部及び前記小径環状部を軸方向に連結する複数の柱部と、前記大径環状部及び前記小径環状部と円周方向に隣り合う前記柱部とによって画成され、玉をそれぞれ保持する複数のポケット部と、を有する軸受装置用の保持器を、円筒状の素材を切削加工して得る、保持器の製造方法において、
前記保持器の外周面は、前記大径環状部の外周面である外径側円筒面と、前記柱部及び前記小径環状部の外周面である外径側テーパ面と、からなり、
前記保持器の内周面は、前記小径環状部の内周面である内径側円筒面と、前記柱部及び前記大径環状部の内周面である内径側テーパ面と、からなり、
前記素材の軸方向一端面を切削加工して、前記保持器の軸方向一端面となる軸方向一端加工面を得ると共に、前記素材の外周面を切削加工して、前記保持器の外径側円筒面となる外径側円筒加工面を得る工程と、
前記軸方向一端加工面及び前記外径側円筒加工面を第１の把持部材によって把持しながら、前記素材の軸方向他端面を切削加工して、前記保持器の軸方向他端面となる軸方向他端加工面を得ると共に、前記素材の外周面を切削加工して、前記保持器の外径側テーパ面となる外径側テーパ加工面を得る工程と、
を備えることを特徴とする保持器の製造方法。
（７）前記第１の把持部材は、軸方向に延びて、前記素材の前記外径側円筒加工面を把持する第１把持部を有し、
前記第１把持部の軸方向幅は、前記保持器の前記外径側円筒面の軸方向幅以下であり、
前記第１把持部によって把持しながら、前記素材の軸方向他端面を切削加工して、前記保持器の軸方向他端面となる軸方向他端加工面を得ると共に、前記素材の外周面を切削加工して、前記保持器の外径側テーパ面となる外径側テーパ加工面を得ることを特徴とする（６）に記載の保持器の製造方法。
（８）前記第１の把持部材は、径方向に延びて、前記素材の前記軸方向一端加工面を把持する第２把持部を有し、
前記第２把持部の径方向幅は、前記保持器の前記軸方向一端面の径方向幅以下であり、
前記軸方向一端加工面及び前記外径側円筒加工面を前記第１の把持部材によって把持しながら、前記素材の内周面を切削加工して、前記保持器の内径側テーパ面となる内径側テーパ加工面と、前記保持器の内径側円筒面となる内径側円筒加工面と、を得る工程を備えることを特徴とする（７）に記載の保持器の製造方法。
（９）前記第２把持部の径方向幅は、前記保持器の前記軸方向一端面の径方向幅以下であり、前記軸方向一端加工面及び前記外径側円筒加工面を、第２の把持部材によって把持しながら、前記素材の内周面を切削加工して、前記保持器の内径側テーパ面となる内径側テーパ加工面と、前記保持器の内径側円筒面となる内径側円筒加工面と、を得る工程を備えることを特徴とする（６）に記載の保持器の製造方法。
（１０）軸方向一端側に位置する大径環状部と、軸方向他端側に位置する小径環状部と、前記大径環状部及び前記小径環状部を軸方向に連結する複数の柱部と、前記大径環状部及び前記小径環状部と円周方向に隣り合う前記柱部とによって画成され、玉をそれぞれ保持する複数のポケット部と、を有する軸受装置用の保持器を、円筒状の素材を切削加工して得る際に、前記素材を把持する把持部材において、
前記保持器の外周面は、前記大径環状部の外周面である外径側円筒面と、前記柱部及び前記小径環状部の外周面である外径側テーパ面と、からなり、
前記保持器の内周面は、前記小径環状部の内周面である内径側円筒面と、前記柱部及び前記大径環状部の内周面である内径側テーパ面と、からなり、
前記把持部材は、軸方向に延びて、前記素材を外径側から把持する第１把持部を有し、
前記第１把持部の軸方向幅は、前記保持器の前記外径側円筒面の軸方向幅以下であることを特徴とする把持部材。
（１１）前記把持部材は、径方向に延びて、前記素材を軸方向一端側から把持する第２把持部を有し、
前記第２把持部の径方向幅は、前記保持器の軸方向一端面の径方向幅以下であることを特徴とする（１０）に記載の把持部材。 The above object of the present invention can be achieved by the following constitution.
(1) In a bearing device having an outer ring, an inner ring, a plurality of balls disposed between the outer ring and the inner ring, and a cage that holds the plurality of balls.
The cage includes a large-diameter annular portion and a small-diameter annular portion, a plurality of column portions that connect the large-diameter annular portion and the small-diameter annular portion in the axial direction, the large-diameter annular portion, the small-diameter annular portion, and a circumference. A plurality of pocket portions each defined by the pillar portions adjacent in the direction and holding the balls,
An axial width of an outer peripheral surface of the large-diameter annular portion is 10 to 30% of an axial width of the cage.
(2) The bearing device according to (1), wherein an outer diameter of an outer peripheral surface of the large-diameter annular portion is 82 to 89% of an outer diameter of the bearing device.
(3) In a bearing device having an outer ring, an inner ring, a plurality of balls disposed between the outer ring and the inner ring, and a cage that holds the plurality of balls.
The cage includes a large-diameter annular portion and a small-diameter annular portion, a plurality of column portions that connect the large-diameter annular portion and the small-diameter annular portion in the axial direction, the large-diameter annular portion, the small-diameter annular portion, and a circumference. Defined by the pillars adjacent to each other in a direction, and having a pocket for holding the ball,
The outer diameter of the outer peripheral surface of the large-diameter annular portion is 82 to 89% of the outer diameter of the bearing device.
(4) The bearing device according to any one of (1) to (3), wherein an axial width of the cage is 90 to 96% of an axial width of the bearing device.
(5) The outer peripheral surface of the cage includes an outer-diameter cylindrical surface that is an outer peripheral surface of the large-diameter annular portion, and an outer-diameter tapered surface that is an outer peripheral surface of the column portion and the small-diameter annular portion. ,
The inner peripheral surface of the cage is composed of an inner diameter side cylindrical surface that is an inner peripheral surface of the small diameter annular portion, and an inner diameter side tapered surface that is an inner peripheral surface of the column portion and the large diameter annular portion. The bearing device according to any one of (1) to (4), which is characterized.
(6) A large-diameter annular portion disposed on one axial end side, a small-diameter annular portion disposed on the other axial end side, and a plurality of columns that connect the large-diameter annular portion and the small-diameter annular portion in the axial direction. A cage for a bearing device having a portion, and a plurality of pocket portions each holding a ball, which are defined by the pillar portion adjacent to the circumferential portion in the circumferential direction with the large-diameter annular portion and the small-diameter annular portion, In a method for manufacturing a cage obtained by cutting a cylindrical material,
The outer peripheral surface of the cage is composed of an outer diameter side cylindrical surface which is an outer peripheral surface of the large diameter annular portion, and an outer diameter side tapered surface which is an outer peripheral surface of the column portion and the small diameter annular portion,
The inner peripheral surface of the cage is composed of an inner diameter side cylindrical surface that is an inner peripheral surface of the small diameter annular portion, and an inner diameter side tapered surface that is an inner peripheral surface of the pillar portion and the large diameter annular portion,
One end surface in the axial direction of the material is cut to obtain one end surface in the axial direction that becomes one end surface in the axial direction of the cage, and the outer peripheral surface of the material is cut to obtain an outer diameter side of the cage. Obtaining an outer diameter side cylindrical machining surface to be a cylindrical surface;
While gripping the one axially processed surface and the outer diameter side cylindrical processed surface with the first gripping member, the axially other end surface of the material is cut and axially used as the other axial end surface of the cage Obtaining the other end processed surface and cutting the outer peripheral surface of the material to obtain an outer diameter side tapered surface that becomes the outer diameter side tapered surface of the cage;
A method for manufacturing a cage, comprising:
(7) The first gripping member includes a first gripping part that extends in the axial direction and grips the outer diameter side cylindrical machining surface of the material.
The axial width of the first gripping portion is equal to or less than the axial width of the outer cylindrical surface of the cage,
While gripping by the first gripping part, the other axial end surface of the material is cut to obtain an axial other end surface that becomes the other axial end surface of the cage, and the outer peripheral surface of the material is cut. The method for manufacturing a cage according to (6), wherein the outer diameter side tapered surface that is to be the outer diameter side tapered surface of the cage is obtained by processing.
(8) The first gripping member includes a second gripping portion that extends in a radial direction and grips the one axial end machining surface of the material.
The radial width of the second grip portion is equal to or less than the radial width of the axial end surface of the cage,
The inner diameter side which becomes the inner diameter side tapered surface of the cage by cutting the inner peripheral surface of the material while gripping the one end processing surface in the axial direction and the cylindrical processing surface on the outer diameter side with the first gripping member. (7) The method for manufacturing a cage according to (7), further comprising a step of obtaining a tapered surface and an inner diameter side cylindrical processed surface to be an inner diameter side cylindrical surface of the cage.
(9) A radial width of the second grip portion is equal to or less than a radial width of the one axial end surface of the cage, and the axial one end machining surface and the outer diameter side cylindrical machining surface are second While gripping by the gripping member, the inner peripheral surface of the material is cut to process an inner diameter side tapered surface that becomes the inner diameter side tapered surface of the cage, and an inner diameter side cylindrical surface that becomes the inner diameter side cylindrical surface of the cage The method for producing a cage according to (6), further comprising a step of obtaining a surface.
(10) A large-diameter annular portion located on one end side in the axial direction, a small-diameter annular portion located on the other end side in the axial direction, and a plurality of column portions connecting the large-diameter annular portion and the small-diameter annular portion in the axial direction. A cage for a bearing device having a plurality of pocket portions each holding a ball, which is defined by the pillar portion adjacent to the large-diameter annular portion and the small-diameter annular portion in the circumferential direction. In the gripping member that grips the material when the material is cut and processed,
The outer peripheral surface of the cage is composed of an outer diameter side cylindrical surface which is an outer peripheral surface of the large diameter annular portion, and an outer diameter side tapered surface which is an outer peripheral surface of the column portion and the small diameter annular portion,
The inner peripheral surface of the cage is composed of an inner diameter side cylindrical surface that is an inner peripheral surface of the small diameter annular portion, and an inner diameter side tapered surface that is an inner peripheral surface of the pillar portion and the large diameter annular portion,
The gripping member has a first gripping part that extends in the axial direction and grips the material from the outer diameter side,
The holding member according to claim 1, wherein an axial width of the first holding portion is equal to or less than an axial width of the outer cylindrical surface of the retainer.
(11) The gripping member includes a second gripping portion that extends in a radial direction and grips the material from one end side in the axial direction.
The holding member according to (10), wherein a radial width of the second holding portion is equal to or less than a radial width of one axial end surface of the cage.

本発明の軸受装置によれば、大径環状部の外周面の軸方向幅は、保持器の軸方向幅の１０〜３０％である。このように大径環状部の外周面の軸方向幅を設定することにより、保持器の外径を低減することができるので、保持器を製作する際の素材の外径及び重量を低減することができる。したがって、保持器の製作コストを低減することが可能である。
また、本発明の保持器の製造方法によれば、軸方向一端加工面及び外径側円筒加工面を把持部材によって把持しながら、素材の軸方向他端面を切削加工して、保持器の軸方向他端面となる軸方向他端加工面を得ると共に、素材の外周面を切削加工して、保持器の外径側テーパ面となる外径側テーパ加工面を得る工程を備える。したがって、１種類の把持部材のみで、軸方向他端加工面及び外径側テーパ加工面を得ることが可能であるので、把持部材の数、加工のための素材脱着回数、及び加工時間をそれぞれ削減でき、保持器の製造コストを低減することが可能である。更に、本発明の保持器の製造方法によれば、保持器の外径を低減することができるので、保持器を製作する際の素材の外径及び重量を低減することもできる。
また、本発明の把持部材によれば、軸方向に延びて、前記素材を外径側から把持する第１把持部を有し、当該第１把持部の軸方向幅は、保持器の外径側円筒面の軸方向幅以下である。したがって、切削加工により外径側テーパ加工面を得る際に、切削バイト等の切削工具と干渉することが防止される。したがって、他の把持部材を用いることなく、外径側テーパ加工面を得ることができるので、把持部材の数、加工のための素材脱着回数、及び加工時間をそれぞれ削減でき、保持器の製造コストを低減することが可能である。 According to the bearing device of the present invention, the axial width of the outer peripheral surface of the large-diameter annular portion is 10 to 30% of the axial width of the cage. Since the outer diameter of the cage can be reduced by setting the axial width of the outer peripheral surface of the large-diameter annular portion in this way, the outer diameter and weight of the material when the cage is manufactured can be reduced. Can do. Therefore, it is possible to reduce the manufacturing cost of the cage.
Further, according to the cage manufacturing method of the present invention, the other end surface in the axial direction of the material is cut while gripping the one end machining surface in the axial direction and the cylindrical machining surface on the outer diameter side by the gripping member. A process of obtaining the other end surface in the axial direction that is the other end surface in the direction and cutting the outer peripheral surface of the material to obtain the outer diameter side tapered surface that is the outer diameter side tapered surface of the cage. Therefore, since it is possible to obtain the other axially processed surface and the outer diameter side tapered surface with only one type of gripping member, the number of gripping members, the number of material attachment / detachment times for processing, and the processing time are respectively set. This can reduce the manufacturing cost of the cage. Furthermore, according to the method for manufacturing a cage of the present invention, the outer diameter of the cage can be reduced, so that the outer diameter and weight of the material when manufacturing the cage can also be reduced.
According to the gripping member of the present invention, the gripping member has a first gripping portion that extends in the axial direction and grips the material from the outer diameter side, and the axial width of the first gripping portion is the outer diameter of the cage. It is below the axial width of the side cylindrical surface. Therefore, when the outer diameter side tapered surface is obtained by cutting, interference with a cutting tool such as a cutting tool is prevented. Therefore, since the outer diameter side tapered surface can be obtained without using other gripping members, the number of gripping members, the number of times of material detachment for processing, and the processing time can be reduced, and the manufacturing cost of the cage can be reduced. Can be reduced.

アンギュラ玉軸受の断面図である。It is sectional drawing of an angular contact ball bearing. 保持器の一部断面図である。It is a partial cross section figure of a holder | retainer. （ａ）は比較例に係る保持器の断面図であり、（ｂ）は実施形態に係る保持器の断面図である。(A) is sectional drawing of the cage which concerns on a comparative example, (b) is sectional drawing of the cage concerning embodiment. （ａ）は比較例に係る保持器を得るための素材の断面図であり、（ｂ）は実施形態に係る保持器を得るための素材の断面図である。(A) is sectional drawing of the raw material for obtaining the holder | retainer which concerns on a comparative example, (b) is sectional drawing of the raw material for obtaining the holder | retainer which concerns on embodiment. （ａ）〜（ｅ）は本実施形態に係る保持器の製造工程を示す図である。(A)-(e) is a figure which shows the manufacturing process of the holder | retainer which concerns on this embodiment. （ａ）〜（ｅ）は変形例に係る保持器の製造工程を示す図である。(A)-(e) is a figure which shows the manufacturing process of the holder | retainer which concerns on a modification. （ａ）〜（ｆ）は比較例に係る保持器の製造工程を示す図である。(A)-(f) is a figure which shows the manufacturing process of the holder | retainer which concerns on a comparative example.

以下、本発明の一実施形態に係る軸受装置について、図面に基づいて詳細に説明する。 Hereinafter, a bearing device according to an embodiment of the present invention will be described in detail based on the drawings.

図１に示すように、軸受装置としてのアンギュラ玉軸受１０は、外輪１１と、内輪１２と、外輪１１及び内輪１２間に配置された複数の玉１３と、複数の玉１３を保持する保持器１４と、を有する。保持器１４は、玉案内形式である。 As shown in FIG. 1, an angular ball bearing 10 as a bearing device includes an outer ring 11, an inner ring 12, a plurality of balls 13 disposed between the outer ring 11 and the inner ring 12, and a cage that holds the plurality of balls 13. 14 and. The cage 14 is a ball guide type.

図２に示すように、保持器１４は、銅合金からなる矩形断面の円筒形状である素材１５´（図４（ｂ）参照）から切削加工されるもみぬき保持器である。保持器１４は、軸方向一端側（図中、左側）に位置する大径環状部１４ａと、軸方向他端側（図中、右側）に位置する小径環状部１４ｂと、大径環状部１４ａ及び小径環状部１４ｂを軸方向に連結する複数の柱部１４ｃと、大径環状部１４ａ及び小径環状部１４ｂと円周方向に隣り合う柱部１４ｃとによって画成され、玉１３をそれぞれ保持する複数のポケット部１４ｄと、を有する。柱部１４ｃは、大径環状部１４ａから小径環状部１４ｂに向かうにつれて、保持器１４の軸線に近接するように内周側に傾いている。 As shown in FIG. 2, the cage 14 is a rice bran machine that is cut from a material 15 ′ (see FIG. 4B) having a rectangular cross section made of a copper alloy. The cage 14 includes a large-diameter annular portion 14a located on one axial end side (left side in the drawing), a small-diameter annular portion 14b located on the other axial end side (right side in the drawing), and a large-diameter annular portion 14a. And the plurality of column portions 14c that connect the small-diameter annular portion 14b in the axial direction, and the pillar portions 14c that are adjacent to the large-diameter annular portion 14a and the small-diameter annular portion 14b in the circumferential direction, and hold the balls 13 respectively. A plurality of pocket portions 14d. The column portion 14c is inclined toward the inner peripheral side so as to approach the axis of the retainer 14 as it goes from the large-diameter annular portion 14a to the small-diameter annular portion 14b.

保持器１４の外周面は、保持器１４を軸線直交方向に見たときに、大径環状部１４ａの外周面である外径側円筒面１４ｅと、柱部１４ｃ及び小径環状部１４ｂの外周面であり、軸線に対して傾く外径側テーパ面１４ｆとからなる。保持器１４の内周面は、保持器１４を軸線直交方向に見たときに、小径環状部１４ｂの内周面である内径側円筒面１４ｇと、柱部１４ｃ及び大径環状部１４ａの内周面であり、軸線に対して傾く内径側テーパ面１４ｈとからなる。保持器１４の軸方向一端面１４ｉは、大径環状部１４ａの軸方向一端面であり、外径側円筒面１４ｅ及び内径側テーパ面１４ｈの軸方向一端部同士を径方向に結ぶ。保持器１４の軸方向他端面１４ｊは、小径環状部１４ｂの軸方向他端面であり、内径側円筒面１４ｇ及び外径側テーパ面１４ｆの軸方向他端部同士を径方向に結ぶ。 When the cage 14 is viewed in the direction orthogonal to the axis, the outer circumferential surface of the cage 14 is an outer circumferential surface of the outer diameter side cylindrical surface 14e that is the outer circumferential surface of the large diameter annular portion 14a, and the outer circumferential surfaces of the column portion 14c and the small diameter annular portion 14b. The outer diameter side tapered surface 14f is inclined with respect to the axis. When the cage 14 is viewed in the direction orthogonal to the axis, the inner circumferential surface of the cage 14 is the inner diameter side cylindrical surface 14g, which is the inner circumferential surface of the small-diameter annular portion 14b, and the inner side of the column portion 14c and the large-diameter annular portion 14a. It is a peripheral surface, and consists of an inner diameter side tapered surface 14h inclined with respect to the axis. One end surface 14i in the axial direction of the cage 14 is one end surface in the axial direction of the large-diameter annular portion 14a, and connects one end portion in the axial direction of the outer cylindrical surface 14e and the inner tapered surface 14h in the radial direction. The other axial end surface 14j of the cage 14 is the other axial end surface of the small-diameter annular portion 14b, and connects the other axial end portions of the inner diameter side cylindrical surface 14g and the outer diameter side tapered surface 14f in the radial direction.

ここで、図３（ｂ）に示すように、本実施形態の保持器１４の軸方向幅をＢとし、大径環状部１４ａの外周面（外径側円筒面１４ｅ）の軸方向幅をｂ´とし、大径環状部１４ａの外周面の外径（保持器１４の外径）をφＤ´とし、小径環状部１４ｂの内周面（内径側円筒面１４ｇ）の内径（保持器１４の内径）をφｄとし、保持器１４の径方向における肉厚をｔ´とする。なお、φＤ´＝φｄ＋２ｔ´の関係が成立する。 Here, as shown in FIG. 3B, the axial width of the cage 14 of the present embodiment is B, and the axial width of the outer peripheral surface (outer diameter side cylindrical surface 14e) of the large-diameter annular portion 14a is b. ′, The outer diameter of the outer peripheral surface of the large-diameter annular portion 14a (outer diameter of the cage 14) is φD ′, and the inner diameter of the inner peripheral surface (inner diameter side cylindrical surface 14g) of the small-diameter annular portion 14b (the inner diameter of the cage 14). ) Is φd, and the thickness of the cage 14 in the radial direction is t ′. Note that the relationship of φD ′ = φd + 2t ′ is established.

また、図３（ａ）に示すように、比較例（従来品）の保持器１４の軸方向幅をＢとし、大径環状部１４ａの外周面（外径側円筒面１４ｅ）の軸方向幅をｂとし、大径環状部１４ａの外周面の外径（保持器１４の外径）をφＤとし、小径環状部１４ｂの内周面（内径側円筒面１４ｇ）の内径（保持器１４の内径）をφｄとし、保持器１４の径方向における肉厚をｔとする。なお、φＤ＝φｄ＋２ｔの関係が成立する。 Further, as shown in FIG. 3A, the axial width of the cage 14 of the comparative example (conventional product) is B, and the axial width of the outer peripheral surface (outer cylindrical surface 14e) of the large-diameter annular portion 14a. Is b, the outer diameter of the outer peripheral surface of the large-diameter annular portion 14a (the outer diameter of the retainer 14) is φD, and the inner diameter of the inner peripheral surface (inner diameter side cylindrical surface 14g) of the small-diameter annular portion 14b (the inner diameter of the retainer 14). ) Is φd, and the thickness of the cage 14 in the radial direction is t. Note that the relationship φD = φd + 2t is established.

図４（ａ）及び（ｂ）には、比較例（従来品）及び本実施形態の保持器１４を切削加工して得るための、矩形断面の円筒形状である素材１５、１５´が示されている。それぞれの素材１５、１５´は、ｂ´をｂより長く設定することで、φＤ´をφＤよりも小さくすることができる。但し、外径側テーパ面１４ｆの垂直方向に対する傾斜角度Ａ、外径側テーパ面１４ｆ及び内径側テーパ面１４ｈ間の肉厚ｎ、及び小径環状部１４ｂの内周面の内径φｄは、比較例（従来品）と本実施形態で変更がない。よって、本実施形態の保持器１４は、大径環状部１４ａの外周面の軸方向幅ｂ´を従来品の軸方向幅ｂよりも長く設定することで、大径環状部１４ａの外径φＤ´が従来品の外径φＤより小さくなる。その結果、素材１５´は、従来品の素材１５より、径方向の寸法を小さく設定でき、素材のコストを低減することができる。 FIGS. 4A and 4B show materials 15 and 15 ′ having a cylindrical shape with a rectangular cross section, which are obtained by cutting the comparative example (conventional product) and the cage 14 of the present embodiment. ing. Each material 15 and 15 'can make φD' smaller than φD by setting b 'longer than b. However, the inclination angle A with respect to the vertical direction of the outer diameter side tapered surface 14f, the thickness n between the outer diameter side tapered surface 14f and the inner diameter side tapered surface 14h, and the inner diameter φd of the inner peripheral surface of the small diameter annular portion 14b are comparative examples. There is no change in this embodiment with (conventional product). Therefore, the cage 14 of the present embodiment sets the outer diameter φD of the large-diameter annular portion 14a by setting the axial width b ′ of the outer peripheral surface of the large-diameter annular portion 14a to be longer than the axial width b of the conventional product. 'Becomes smaller than the outer diameter φD of the conventional product. As a result, the material 15 'can be set to have a smaller radial dimension than the conventional material 15, and the cost of the material can be reduced.

さらに、比較例及び本実施形態のアンギュラ玉軸受１０は、外径が８０〜２６０ｍｍに設定される。比較例の保持器１４においては、大径環状部１４ａの外周面（外径側円筒面１４ｅ）の軸方向幅ｂが、保持器１４の軸方向幅Ｂの５〜１０％に設定されるのに対して、大径環状部１４ａの外周面（外径側円筒面１４ｅ）の軸方向幅ｂ´は、保持器１４の軸方向幅Ｂの１０〜３０％に設定される。これにより、保持器１４を加工する際に、大径環状部１４ａの外周面（外径側円筒面１４ｅ）が、後述する外径側把持部材２３（図５参照）に保持されやすくなり、さらに、大径環状部１４ａの外周面の外径φＤを、アンギュラ玉軸受１０の外径の８２〜８９％とすることが可能となる。したがって、上述のように素材１５´の外径φＤ´も比較例の外径φＤに比べて低減され、重量を削減し、保持器１４の製作コストを低減することが可能となる。 Furthermore, the outer diameter of the angular contact ball bearing 10 of the comparative example and this embodiment is set to 80 to 260 mm. In the cage 14 of the comparative example, the axial width b of the outer peripheral surface (outer diameter side cylindrical surface 14e) of the large-diameter annular portion 14a is set to 5 to 10% of the axial width B of the cage 14. On the other hand, the axial width b ′ of the outer circumferential surface (outer diameter side cylindrical surface 14 e) of the large-diameter annular portion 14 a is set to 10 to 30% of the axial width B of the cage 14. Thereby, when processing the retainer 14, the outer peripheral surface (outer diameter side cylindrical surface 14e) of the large diameter annular portion 14a is easily held by the outer diameter side gripping member 23 (see FIG. 5) described later. The outer diameter φD of the outer peripheral surface of the large-diameter annular portion 14 a can be 82 to 89% of the outer diameter of the angular ball bearing 10. Therefore, as described above, the outer diameter φD ′ of the material 15 ′ is also reduced as compared with the outer diameter φD of the comparative example, so that the weight can be reduced and the manufacturing cost of the cage 14 can be reduced.

なお、本実施形態では、保持器１４の径方向における肉厚ｔ´が比較例の肉厚ｔに比べて減少するので、応力が上昇することが懸念される。しかしながら、本実施形態のアンギュラ玉軸受１０の主な用途であるポンプにおいて、ＡＰＩ（ＡｍｅｒｉｃａｎＰｅｔｒｏｌｅｕｍＩｎｓｔｉｔｕｔｅ）規格に準じたポンプの最大回転速度であるｄｍＮ５０万で保持器１４に遠心力によって生じる応力は、高力黄銅鋳物材の引張強さと比較し、４倍以上の安全率を有しているため、問題ない。 In the present embodiment, since the thickness t ′ in the radial direction of the cage 14 is smaller than the thickness t of the comparative example, there is a concern that the stress increases. However, in the pump that is the main application of the angular ball bearing 10 of the present embodiment, the stress generated by the centrifugal force in the cage 14 at dmN 500,000, which is the maximum rotational speed of the pump according to the API (American Petroleum Institute) standard, Compared with the tensile strength of high strength brass casting material, it has a safety factor of 4 times or more, so there is no problem.

次に、本実施形態の保持器１４を、素材１５´を切削加工して得る方法について図５を用いて説明する。図５中、ハッチングで示された領域は、切削バイトによって素材１５´が切削された部分である。 Next, a method for obtaining the cage 14 of the present embodiment by cutting the material 15 ′ will be described with reference to FIG. In FIG. 5, a hatched area is a portion where the material 15 ′ is cut with a cutting tool.

先ず、図５（ａ）に示すような、円筒状の素材１５´に旋削粗加工を施す。ここで、素材１５´の軸方向一端面、軸方向他端面、外周面、及び内周面は、それぞれ符号１６、１７、１８、１９で示されている。 First, a rough turning process is performed on a cylindrical material 15 'as shown in FIG. Here, the one end surface in the axial direction, the other end surface in the axial direction, the outer peripheral surface, and the inner peripheral surface of the material 15 ′ are denoted by reference numerals 16, 17, 18, and 19, respectively.

次に、図５（ｂ）に示すように、素材１５´の軸方向他端面１７及び内周面１９を内径側把持部材２０によって把持する。内径側把持部材２０は、軸方向に延びて素材１５´の内周面１９を把持する第１把持部２１と、径方向に延びて素材１５´の軸方向他端面１７を把持する第２把持部２２と、を有する環状構造である。なお、第１及び第２把持部２１、２２はそれぞれ、略円環状の１つのチャック爪から構成されてもよく、円周方向等配に配置された略円弧状の複数のチャック爪から構成されてもよい。 Next, as shown in FIG. 5 (b), the other axial end surface 17 and the inner peripheral surface 19 of the material 15 ′ are gripped by the inner diameter side gripping member 20. The inner diameter side holding member 20 extends in the axial direction and holds the first holding portion 21 that holds the inner peripheral surface 19 of the material 15 ′, and the second holding portion that extends in the radial direction and holds the other end surface 17 in the axial direction of the material 15 ′. And a ring structure having a portion 22. Each of the first and second gripping portions 21 and 22 may be composed of one substantially annular chuck claw, and is composed of a plurality of substantially arc-shaped chuck claws arranged at equal intervals in the circumferential direction. May be.

このように、内径側把持部材２０によって素材１５´が把持された状態で、素材１５´の軸方向一端面１６を切削加工して、保持器１４（大径環状部１４ａ）の軸方向一端面１４ｉとなる軸方向一端加工面１６ａを得るとともに、素材１５´の外周面１８を切削加工して、保持器１４（大径環状部１４ａ）の外径側円筒面１４ｅとなる外径側円筒加工面１８ａを得る。外径側円筒加工面１８ａの軸方向幅Ｃは、保持器１４の外径側円筒面１４ｅの軸方向幅ｂ´以上に設定される（Ｃ≧ｂ´）。 In this way, in the state where the material 15 ′ is gripped by the inner diameter side gripping member 20, the axial end surface 16 of the material 15 ′ is cut, and the axial end surface of the cage 14 (large diameter annular portion 14 a). 14i is obtained as an axial end machining surface 16a to be 14i, and the outer peripheral surface 18 of the material 15 'is cut to form an outer diameter side cylindrical surface 14e of the retainer 14 (large diameter annular portion 14a). A surface 18a is obtained. The axial width C of the outer diameter side cylindrical machining surface 18a is set to be equal to or larger than the axial width b ′ of the outer diameter side cylindrical surface 14e of the cage 14 (C ≧ b ′).

次に、図５（ｃ）に示すように、軸方向に反転させた素材１５´の軸方向一端加工面１６ａ及び外径側円筒加工面１８ａを外径側把持部材２３によって把持する。外径側把持部材２３は、軸方向に延びて素材１５´の外径側円筒加工面１８ａを把持する第１把持部２４と、径方向に延びて素材１５´の軸方向一端加工面１６ａを把持する第２把持部２５と、を有する環状構造である。なお、第１及び第２把持部２４、２５はそれぞれ、略円環状の１つのチャック爪から構成されてもよく、円周方向等配に配置された略円弧状の複数のチャック爪から構成されてもよい。 Next, as shown in FIG. 5C, the axial one end processed surface 16 a and the outer diameter side cylindrical processed surface 18 a of the material 15 ′ reversed in the axial direction are gripped by the outer diameter side gripping member 23. The outer diameter side gripping member 23 extends in the axial direction to hold the first gripping portion 24 that grips the outer diameter side cylindrical machining surface 18a of the material 15 'and the axially one end machining surface 16a of the material 15' extending in the radial direction. An annular structure having a second gripping portion 25 for gripping. Each of the first and second gripping portions 24 and 25 may be composed of a substantially annular chuck claw, or may be composed of a plurality of substantially arc-shaped chuck claws arranged at equal intervals in the circumferential direction. May be.

ここで、第１把持部２４の軸方向幅Ｅは、保持器１４の外径側円筒面１４ｅの軸方向幅ｂ´以下とされている（Ｅ≦ｂ´）。したがって、素材１５´の外周面１８を切削加工して、保持器１４の外径側テーパ面１４ｆとなる外径側テーパ加工面１８ｂを得る際に、第１把持部２４と切削バイトが干渉することが防止される。さらに、素材１５´の軸方向他端面１７も切削加工され、保持器１４（小径環状部１４ｂ）の軸方向他端面１４ｊとなる軸方向他端加工面１７ａが得られる。 Here, the axial width E of the first gripping portion 24 is set to be equal to or smaller than the axial width b ′ of the outer diameter side cylindrical surface 14e of the retainer 14 (E ≦ b ′). Therefore, when the outer peripheral surface 18 of the raw material 15 ′ is cut to obtain the outer diameter side tapered surface 18 b that becomes the outer diameter side tapered surface 14 f of the cage 14, the first grip portion 24 and the cutting bite interfere with each other. It is prevented. Further, the other end surface 17 in the axial direction of the material 15 'is also cut to obtain the other end processed surface 17a in the axial direction that becomes the other end surface 14j in the axial direction of the cage 14 (small-diameter annular portion 14b).

なお、破線で示したように、第１把持部２４の軸方向幅Ｅを、保持器１４の外径側円筒面１４ｅの軸方向幅ｂ´より大きくした場合（Ｅ＞ｂ´）には、図６（ｃ）〜（ｅ）で後述するように、第１把持部２４と切削バイトが干渉してしまうため、他の内径側把持部材２６を用いて、素材１５´をもう一度反転させなければ、外径側テーパ加工面１８ｂを得ることができない。 As indicated by a broken line, when the axial width E of the first gripping portion 24 is larger than the axial width b ′ of the outer cylindrical surface 14e of the retainer 14 (E> b ′), As will be described later with reference to FIGS. 6C to 6E, the first gripping portion 24 and the cutting tool interfere with each other. Therefore, the material 15 ′ must be reversed once again using another inner diameter side gripping member 26. The outer diameter side tapered surface 18b cannot be obtained.

続いて、図５（ｄ）に示すように、外径側把持部材２３によって素材１５´が把持された状態で、素材１５´の内周面１９を切削加工して、保持器１４の内径側テーパ面１４ｈとなる内径側テーパ加工面１９ａと、保持器１４の内径側円筒面１４ｇとなる内径側円筒加工面１９ｂと、を得る。このとき、第２把持部２５の径方向幅Ｆは、保持器１４の軸方向一端面１４ｉの径方向幅Ｇ以下に設定される（Ｆ≦Ｇ）。したがって、内径側テーパ加工面１９ａを得る際に、第２把持部２５と切削バイトが干渉することが防止される。 Subsequently, as shown in FIG. 5D, the inner peripheral surface 19 of the material 15 ′ is cut in a state where the material 15 ′ is gripped by the outer diameter side gripping member 23, and the inner diameter side of the cage 14 is cut. An inner diameter side tapered surface 19a that becomes the tapered surface 14h and an inner diameter side cylindrical surface 19b that becomes the inner diameter side cylindrical surface 14g of the cage 14 are obtained. At this time, the radial width F of the second gripping portion 25 is set to be equal to or less than the radial width G of the axial end surface 14i of the retainer 14 (F ≦ G). Therefore, when the inner diameter side tapered surface 19a is obtained, the second gripping portion 25 and the cutting tool are prevented from interfering with each other.

なお、破線で示したように、第２把持部２５の径方向幅Ｆを保持器１４の軸方向一端面１４ｉの径方向幅Ｇより大きくした場合（Ｆ＞Ｇ）には、内径側テーパ加工面１９ａを得る際に、第２把持部２５と切削バイトが干渉してしまう。 As indicated by the broken line, when the radial width F of the second gripping portion 25 is larger than the radial width G of the axial one end face 14i of the cage 14 (F> G), the inner diameter side taper processing is performed. When the surface 19a is obtained, the second gripping portion 25 and the cutting tool interfere with each other.

以上説明したような工程を経て、図５（ｅ）に示すような保持器１４が得られる。 Through the steps as described above, a cage 14 as shown in FIG. 5E is obtained.

このように、本実施形態の保持器１４の製造方法によれば、軸方向一端加工面１６ａ及び外径側円筒加工面１８ａを外径側把持部材２３によって把持しながら、素材１５´の軸方向他端面１７を切削加工して、保持器１４の軸方向他端面１４ｊとなる軸方向他端加工面１７ａを得ると共に、素材１５´の外周面１８を切削加工して、保持器１４の外径側テーパ面１４ｆとなる外径側テーパ加工面１８ｂを得る工程を備える。したがって、１種類の外径側把持部材２３のみで、軸方向他端加工面１７ａ及び外径側テーパ加工面１８ｂを得ることが可能であるので、把持部材の数、加工のための素材脱着回数、及び加工時間をそれぞれ削減でき、保持器１４の製造コストを低減することが可能である。 Thus, according to the manufacturing method of the retainer 14 of the present embodiment, the axial direction of the material 15 ′ is gripped while gripping the axial one end processed surface 16 a and the outer diameter side cylindrical processed surface 18 a by the outer diameter side gripping member 23. The other end surface 17 is cut to obtain the other end surface 17a in the axial direction which becomes the other end surface 14j in the axial direction of the cage 14, and the outer peripheral surface 18 of the material 15 'is cut to obtain the outer diameter of the cage 14. A step of obtaining an outer diameter side tapered surface 18b to be the side tapered surface 14f is provided. Accordingly, since it is possible to obtain the other axially processed surface 17a and the externally tapered surface 18b with only one type of outer diameter side gripping member 23, the number of gripping members and the number of material attachment / detachment times for processing can be obtained. And the processing time can be reduced, respectively, and the manufacturing cost of the cage 14 can be reduced.

また、外径側把持部材２３は、第１把持部２４の軸方向幅Ｅが、保持器１４の外径側円筒面１４ｅの軸方向幅ｂ´以下とされている（Ｅ≦ｂ´）。したがって、素材１５´の外周面１８を切削加工して、保持器１４の外径側テーパ面１４ｆとなる外径側テーパ加工面１８ｂを得る際に、第１把持部２４と切削バイトが干渉することが防止できる。 Further, in the outer diameter side holding member 23, the axial width E of the first holding portion 24 is set to be equal to or smaller than the axial width b ′ of the outer diameter side cylindrical surface 14e of the cage 14 (E ≦ b ′). Therefore, when the outer peripheral surface 18 of the raw material 15 ′ is cut to obtain the outer diameter side tapered surface 18 b that becomes the outer diameter side tapered surface 14 f of the cage 14, the first grip portion 24 and the cutting bite interfere with each other. Can be prevented.

また、外径側把持部材２３は、第２把持部２５の径方向幅Ｆが、保持器１４の軸方向一端面１４ｉの径方向幅Ｇ以下に設定される（Ｆ≦Ｇ）。したがって、内径側テーパ加工面１９ａを得る際に、第２把持部２５と切削バイトが干渉することが防止される。 Further, in the outer diameter side gripping member 23, the radial width F of the second gripping portion 25 is set to be equal to or smaller than the radial width G of the axial end surface 14i of the retainer 14 (F ≦ G). Therefore, when the inner diameter side tapered surface 19a is obtained, the second gripping portion 25 and the cutting tool are prevented from interfering with each other.

Comparative example

これに対し、図７には、比較例として、第１把持部２４の軸方向幅Ｅを保持器１４の外径側円筒面１４ｅの軸方向幅ｂ´より大きくし（Ｅ＞ｂ´）、且つ、第２把持部２５の径方向幅Ｆを、保持器１４の軸方向他端面１４ｊの径方向幅Ｇより大きくした（Ｆ＞Ｇ）、外径側把持部材２３を用いた場合の、保持器１４の製造方法について説明する。 On the other hand, in FIG. 7, as a comparative example, the axial width E of the first gripping portion 24 is made larger than the axial width b ′ of the outer cylindrical surface 14e of the retainer 14 (E> b ′), Further, the holding in the case of using the outer diameter side holding member 23 in which the radial width F of the second holding portion 25 is made larger than the radial width G of the other axial end surface 14j of the cage 14 (F> G). A method for manufacturing the container 14 will be described.

先ず、図７（ａ）に示すような円筒状の素材１５´に旋削粗加工を施す。 First, a rough turning process is performed on a cylindrical material 15 'as shown in FIG.

次に、図７（ｂ）に示すように、素材１５´の軸方向他端面１７及び内周面１９を内径側把持部材２０の第１及び第２把持部２１、２２によって把持する。このように、内径側把持部材２０によって素材１５´が把持された状態で、素材１５´の軸方向一端面１６を切削加工して、保持器１４の軸方向一端面１４ｉとなる軸方向一端加工面１６ａを得るとともに、素材１５´の外周面１８を切削加工して、保持器１４の外径側円筒面１４ｅとなる外径側円筒加工面１８ａを得る。上述の実施形態と異なり、外径側円筒加工面１８ａは、素材１５´の外周面１８全面に亘って形成される。 Next, as shown in FIG. 7B, the other axial end surface 17 and the inner peripheral surface 19 of the material 15 ′ are gripped by the first and second gripping portions 21 and 22 of the inner diameter side gripping member 20. In this way, in the state where the material 15 ′ is gripped by the inner diameter side gripping member 20, the axial one end surface 16 of the retainer 14 is formed by cutting the axial one end surface 16 of the material 15 ′. While obtaining the surface 16a, the outer peripheral surface 18 of raw material 15 'is cut and the outer diameter side cylindrical processing surface 18a used as the outer diameter side cylindrical surface 14e of the holder | retainer 14 is obtained. Unlike the above-described embodiment, the outer cylindrical surface 18a is formed over the entire outer peripheral surface 18 of the material 15 '.

次に、図７（ｃ）に示すように、軸方向に反転させた素材１５´の軸方向一端加工面１６ａ及び外径側円筒加工面１８ａを外径側把持部材２３の第１及び第２把持部２４、２５によって把持する。ここで、第１把持部２４の軸方向幅Ｅは、保持器１４の外径側円筒面１４ｅの軸方向幅ｂ´より大きく（Ｅ＞ｂ´）、且つ、第２把持部２５の径方向幅Ｆは、保持器１４の軸方向他端面１４ｊの径方向幅Ｇより大きい（Ｆ＞Ｇ）。したがって、上述の実施形態と異なり、図７（ｃ）に示すような把持状態では、素材１５´に外径側テーパ加工面１８ｂや内径側テーパ加工面１９ａを研削加工することができない。したがって、本比較例では、素材１５´の軸方向他端面１７を切削加工し、保持器１４（小径環状部１４ｂ）の軸方向他端面１４ｊとなる軸方向他端加工面１７ａを形成すると共に、素材１５´の内周面１９を研削加工して、保持器１４の内径側円筒面１４ｇとなる内径側円筒加工面１９ｂを形成する。上述の実施形態と異なり、内径側円筒加工面１９ｂは、素材１５´の内周面１９全面に亘って形成される。 Next, as shown in FIG. 7C, the axial one end processed surface 16 a and the outer diameter side cylindrical processed surface 18 a of the material 15 ′ reversed in the axial direction are used as the first and second of the outer diameter side holding member 23. It is gripped by the gripping parts 24 and 25. Here, the axial width E of the first gripping portion 24 is larger than the axial width b ′ of the outer cylindrical surface 14 e of the retainer 14 (E> b ′), and the radial direction of the second gripping portion 25. The width F is larger than the radial width G of the other axial end surface 14j of the cage 14 (F> G). Therefore, unlike the above-described embodiment, in the gripping state as shown in FIG. 7C, the outer diameter side tapered surface 18b and the inner diameter side tapered surface 19a cannot be ground on the material 15 ′. Therefore, in this comparative example, the other end surface 17 in the axial direction of the material 15 'is cut to form the other end surface 17a in the axial direction that becomes the other end surface 14j in the axial direction of the cage 14 (small-diameter annular portion 14b). The inner peripheral surface 19 of the material 15 ′ is ground to form an inner diameter side cylindrical processing surface 19 b that becomes the inner diameter side cylindrical surface 14 g of the cage 14. Unlike the above-described embodiment, the inner diameter side cylindrical processing surface 19b is formed over the entire inner peripheral surface 19 of the material 15 '.

続いて、図７（ｄ）に示すように、外径側把持部材２３によって素材１５´が把持された状態で、素材１５´の内径側円筒加工面１９ｂを切削加工して、保持器１４の内径側テーパ面１４ｈとなる内径側テーパ加工面１９ａを得る。 Subsequently, as shown in FIG. 7D, in the state where the material 15 ′ is gripped by the outer diameter side gripping member 23, the inner diameter side cylindrical processing surface 19 b of the material 15 ′ is cut and processed. An inner diameter side tapered surface 19a to be the inner diameter side tapered surface 14h is obtained.

そして、図７（ｅ）に示すように、軸方向に再度反転させた素材１５´の軸方向他端加工面１７ａと内径側円筒加工面１９ｂを、図７（ｂ）で示した内径側把持部材２０とは異なる他の内径側把持部材２６によって把持する。この内径側把持部材２６は、軸方向に延びて素材１５´の内径側円筒加工面１９ｂを把持する第１把持部２７と、径方向に延びて素材１５´の軸方向他端加工面１７ａを把持する第２把持部２８と、を有する環状構造である。そして、素材１５´の外径側円筒加工面１８ａを研削加工することにより、保持器１４の外径側テーパ面１４ｆとなる外径側テーパ加工面１８ｂを得る。 Then, as shown in FIG. 7 (e), the axially other end processed surface 17a and the inner diameter side cylindrical processed surface 19b of the material 15 'reversed again in the axial direction are gripped on the inner diameter side shown in FIG. 7 (b). It is gripped by another inner diameter side gripping member 26 different from the member 20. The inner diameter side gripping member 26 extends in the axial direction to a first grip portion 27 that grips the inner diameter side cylindrical machining surface 19b of the material 15 ′, and an axially other end machining surface 17a of the material 15 ′ that extends in the radial direction. It is an annular structure having a second grip part 28 for gripping. And the outer diameter side taper processing surface 18b used as the outer diameter side taper surface 14f of the holder | retainer 14 is obtained by grinding the outer diameter side cylindrical processing surface 18a of raw material 15 '.

以上説明したような工程を経て、図７（ｅ）に示すような保持器１４が得られる。しかしながら、本比較例においては、把持部材２０、２３、２６の数（種類）が三つ必要であり、素材１５´の軸方向反転回数が二回必要である。また、素材１５´の寸法が、外径φ２２０ｍｍ×軸方向幅５０ｍｍであった場合、本比較例は、研削バイトによる概算の加工長さが２８０ｍｍとなる。 Through the steps described above, the cage 14 as shown in FIG. 7E is obtained. However, in this comparative example, the number (types) of the gripping members 20, 23, and 26 is required, and the number of axial reversals of the material 15 ′ is required twice. Moreover, when the dimension of the raw material 15 ′ is an outer diameter φ220 mm × an axial width 50 mm, in this comparative example, an approximate processing length by a grinding tool is 280 mm.

これに対し、本実施形態では、把持部材２０、２３の数が二つで足り、素材１５´の軸方向反転回数も一回で足りる。そして、素材１５´の寸法が、外径φ２２０ｍｍ×軸方向幅５０ｍｍであった場合、研削バイトによる概算の加工長さが１８０ｍｍとなり、比較例に比べて、約３５％低減できる。 On the other hand, in the present embodiment, two gripping members 20 and 23 are sufficient, and the number of axial reversals of the material 15 ′ is sufficient. And when the dimension of raw material 15 'is outer diameter (phi) 220mm x axial direction width 50mm, the rough processing length by a grinding tool will be 180 mm, and it can reduce about 35% compared with a comparative example.

なお、上述の実施形態では、素材１５´を単一の外径側把持部材２３によって把持しながら、外径側テーパ加工面１８ｂ及び軸方向他端加工面１７ａを切削加工する（図５（ｃ）参照）と共に、内径側テーパ加工面１９ａ及び内径側円筒加工面１９ｂを切削加工していた（図５（ｄ）参照）。しかしながら、必ずしも当該構成に限定されず、図６（ｃ）及び図６（ｄ）に示すように、素材１５´を第１外径側把持部材２３Ａによって把持しながら、外径側テーパ加工面１８ｂ及び軸方向他端加工面１７ａを切削加工するとともに、素材１５´を第２外径側把持部材２３Ｂによって把持しながら、内径側テーパ加工面１９ａ及び内径側円筒加工面１９ｂを切削加工してもよい。 In the above-described embodiment, the outer diameter side tapered surface 18b and the other axially processed surface 17a are cut while the material 15 'is held by the single outer diameter side holding member 23 (FIG. 5C). )) And the inner diameter side tapered machining surface 19a and the inner diameter side cylindrical machining surface 19b were cut (see FIG. 5D). However, the configuration is not necessarily limited thereto, and as illustrated in FIGS. 6C and 6D, the outer diameter side tapered surface 18 b is held while the material 15 ′ is held by the first outer diameter side holding member 23 </ b> A. In addition, while cutting the axially other end processed surface 17a and cutting the inner diameter side tapered processed surface 19a and the inner diameter side cylindrical processed surface 19b while holding the material 15 'by the second outer diameter side holding member 23B, Good.

ここで、第１外径側把持部材２３Ａは、上述した外径側把持部材２３と同様に（図５（ｃ）参照）、第１把持部２４Ａの軸方向幅ＥＡが、保持器１４の外径側円筒面１４ｅの軸方向幅ｂ´以下とされているので（ＥＡ≦ｂ´）、第１把持部２４Ａと切削バイトが干渉することが防止できる。まだ、第１外径側把持部材２３Ａの第２把持部２５Ａの径方向幅ＦＡを、上述した外径側把持部材２３の第２把持部２５の径方向幅Ｆよりも大きく設定することができるので、より確実に素材１５´を把持することができる。 Here, the first outer diameter side gripping member 23A is similar to the outer diameter side gripping member 23 described above (see FIG. 5C), and the axial width EA of the first gripping portion 24A Since the axial width b ′ of the radial cylindrical surface 14e is equal to or smaller than (EA ≦ b ′), it is possible to prevent the first gripping portion 24A and the cutting tool from interfering with each other. Still, the radial width FA of the second gripping portion 25A of the first outer diameter side gripping member 23A can be set larger than the radial width F of the second gripping portion 25 of the outer diameter side gripping member 23 described above. Therefore, the material 15 ′ can be gripped more reliably.

また、第２外径側把持部材２３Ｂは、上述した外径側把持部材２３と同様に（図５（ｄ）参照）、第２把持部２５Ｂの径方向幅ＦＢが、保持器１４の軸方向一端面１４ｉの径方向幅Ｇ以下に設定されるので（ＦＢ≦Ｇ）、第２把持部２５Ｂと切削バイトが干渉することが防止できる。まだ、第２外径側把持部材２３Ｂの第１把持部２４Ｂの軸方向幅ＥＢを、上述した外径側把持部材２３の第１把持部２４の軸方向幅Ｅよりも大きく設定することができるので、より確実に素材１５´を把持することができる。 Further, the second outer diameter side gripping member 23B is similar to the outer diameter side gripping member 23 described above (see FIG. 5D), and the radial width FB of the second gripping portion 25B is the axial direction of the cage 14. Since it is set to be equal to or less than the radial width G of the one end face 14i (FB ≦ G), it is possible to prevent the second gripping portion 25B and the cutting tool from interfering with each other. Still, the axial width EB of the first gripping portion 24B of the second outer diameter side gripping member 23B can be set larger than the axial width E of the first gripping portion 24 of the outer diameter side gripping member 23 described above. Therefore, the material 15 ′ can be gripped more reliably.

なお、図６において上述した工程以外は、図５で示した工程と同一である。 6 is the same as the process shown in FIG. 5 except for the processes described above.

次に、アンギュラ玉軸受１０の寸法や、保持器１４の寸法等を変更した場合に、素材１５の重量がどのように変化するかについて検証を行った。表１に当該検証結果を示す。なお、大径環状部１４ａの外周面の外径（保持器１４の外径）φＤ´は、アンギュラ玉軸受の外径の８２％〜８９％とし、保持器１４の軸方向幅Ｂは、アンギュラ玉軸受の軸方向幅の９０〜９６％とした。 Next, it verified about how the weight of the raw material 15 changes, when the dimension of the angular ball bearing 10, the dimension of the holder | retainer 14, etc. are changed. Table 1 shows the verification results. The outer diameter (outer diameter of the cage 14) φD ′ of the outer peripheral surface of the large-diameter annular portion 14a is 82% to 89% of the outer diameter of the angular ball bearing, and the axial width B of the cage 14 is angular. It was 90 to 96% of the axial width of the ball bearing.

このように、アンギュラ玉軸受１０の外径を９０〜２６０ｍｍに設定し、大径環状部１４ａの外周面（円筒面１４ｅ）の軸方向幅ｂ´を保持器１４の軸方向幅Ｂの１０〜２８％に設定することにより、大径環状部１４ａの外周面の外径（保持器１４の外径）φＤ´を比較例の外径φＤに比べて１〜２％低減でき、素材１５の重量を比較例に比べて３〜９％削減できることが明らかとなった。 Thus, the outer diameter of the angular ball bearing 10 is set to 90 to 260 mm, and the axial width b ′ of the outer peripheral surface (cylindrical surface 14 e) of the large-diameter annular portion 14 a is 10 to 10 of the axial width B of the cage 14. By setting 28%, the outer diameter (outer diameter of the retainer 14) φD ′ of the outer peripheral surface of the large-diameter annular portion 14a can be reduced by 1-2% compared to the outer diameter φD of the comparative example, and the weight of the material 15 It became clear that 3-9% can be reduced compared with a comparative example.

なお、本発明は、前述した各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。 In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.

１０アンギュラ玉軸受（軸受装置）
１１外輪
１２内輪
１３玉
１４保持器
１４ａ大径環状部
１４ｂ小径環状部
１４ｃ柱部
１４ｄポケット部
１４ｅ外径側円筒面
１４ｆ外径側テーパ面
１４ｇ内径側円筒面
１４ｈ内径側テーパ面
１４ｉ軸方向一端面
１４ｊ軸方向他端面
１５´ 素材
１６軸方向一端面
１６ａ軸方向一端加工面
１７軸方向他端面
１７ａ軸方向他端加工面
１８外周面
１８ａ外径側円筒加工面
１８ｂ外径側テーパ加工面
１９内周面
１９ａ内径側テーパ加工面
１９ｂ内径側円筒加工面
２０内径側把持部材
２１第１把持部
２２第２把持部
２３、２３Ａ、２３Ｂ外径側把持部材
２４、２３Ａ、２３Ｂ第１把持部
２５、２５Ａ、２５Ｂ第２把持部
２６内径側把持部材
２７第１把持部
２８第２把持部 10 Angular contact ball bearing (bearing device)
11 outer ring 12 inner ring 13 ball 14 cage 14a large-diameter annular portion 14b small-diameter annular portion 14c column portion 14d pocket portion 14e outer-diameter side cylindrical surface 14f outer-diameter side tapered surface 14g inner-diameter side cylindrical surface 14h inner-diameter side tapered surface 14i End surface 14j The other end surface 15 'in the axial direction Material 16 One end surface 16a in the axial direction One end processing surface 17 in the axial direction The other end surface 17a in the axial direction The other end processing surface 18 in the axial direction The outer peripheral surface 18a The outer cylindrical surface 18b The outer diameter side tapered processing surface 19 Inner peripheral surface 19a Inner diameter side tapered machining surface 19b Inner diameter side cylindrical machining surface 20 Inner diameter side gripping member 21 First gripping portion 22 Second gripping portions 23, 23A, 23B Outer diameter side gripping members 24, 23A, 23B First gripping portion 25 , 25A, 25B Second gripping portion 26 Inner diameter side gripping member 27 First gripping portion 28 Second gripping portion

Claims

In a bearing device having an outer ring, an inner ring, a plurality of balls arranged between the outer ring and the inner ring, and a cage for holding the plurality of balls,
The cage includes a large-diameter annular portion and a small-diameter annular portion, a plurality of column portions that connect the large-diameter annular portion and the small-diameter annular portion in the axial direction, the large-diameter annular portion, the small-diameter annular portion, and a circumference. A plurality of pocket portions each defined by the pillar portions adjacent in the direction and holding the balls,
An axial width of an outer peripheral surface of the large-diameter annular portion is 10 to 30% of an axial width of the cage.

The bearing device according to claim 1, wherein an outer diameter of an outer peripheral surface of the large-diameter annular portion is 82 to 89% of an outer diameter of the bearing device.

In a bearing device having an outer ring, an inner ring, a plurality of balls arranged between the outer ring and the inner ring, and a cage for holding the plurality of balls,
The cage includes a large-diameter annular portion and a small-diameter annular portion, a plurality of column portions that connect the large-diameter annular portion and the small-diameter annular portion in the axial direction, the large-diameter annular portion, the small-diameter annular portion, and a circumference. Defined by the pillars adjacent to each other in a direction, and having a pocket for holding the ball,
The outer diameter of the outer peripheral surface of the large-diameter annular portion is 82 to 89% of the outer diameter of the bearing device.

The bearing device according to any one of claims 1 to 3, wherein an axial width of the cage is 90 to 96% of an axial width of the bearing device.

The outer peripheral surface of the cage is composed of an outer diameter side cylindrical surface which is an outer peripheral surface of the large diameter annular portion, and an outer diameter side tapered surface which is an outer peripheral surface of the column portion and the small diameter annular portion,
The inner peripheral surface of the cage is composed of an inner diameter side cylindrical surface that is an inner peripheral surface of the small diameter annular portion, and an inner diameter side tapered surface that is an inner peripheral surface of the column portion and the large diameter annular portion. The bearing device according to any one of claims 1 to 4, characterized in that:

A large-diameter annular portion disposed on one end side in the axial direction, a small-diameter annular portion disposed on the other end side in the axial direction, and a plurality of column portions that connect the large-diameter annular portion and the small-diameter annular portion in the axial direction; A cage for a bearing device having a plurality of pocket portions each holding a ball, which is defined by the pillar portion adjacent to the large-diameter annular portion and the small-diameter annular portion in the circumferential direction, In a method for manufacturing a cage obtained by cutting a material,
The outer peripheral surface of the cage is composed of an outer diameter side cylindrical surface which is an outer peripheral surface of the large diameter annular portion, and an outer diameter side tapered surface which is an outer peripheral surface of the column portion and the small diameter annular portion,
The inner peripheral surface of the cage is composed of an inner diameter side cylindrical surface that is an inner peripheral surface of the small diameter annular portion, and an inner diameter side tapered surface that is an inner peripheral surface of the pillar portion and the large diameter annular portion,
One end surface in the axial direction of the material is cut to obtain one end surface in the axial direction that becomes one end surface in the axial direction of the cage, and the outer peripheral surface of the material is cut to obtain an outer diameter side of the cage. Obtaining an outer diameter side cylindrical machining surface to be a cylindrical surface;
While gripping the one axially processed surface and the outer diameter side cylindrical processed surface with the first gripping member, the axially other end surface of the material is cut and axially used as the other axial end surface of the cage Obtaining the other end processed surface and cutting the outer peripheral surface of the material to obtain an outer diameter side tapered surface that becomes the outer diameter side tapered surface of the cage;
A method for manufacturing a cage, comprising:

The first gripping member has a first gripping portion that extends in the axial direction and grips the outer diameter side cylindrical machining surface of the material,
The axial width of the first gripping portion is equal to or less than the axial width of the outer cylindrical surface of the cage,
While gripping by the first gripping part, the other axial end surface of the material is cut to obtain an axial other end surface that becomes the other axial end surface of the cage, and the outer peripheral surface of the material is cut. The method for manufacturing a cage according to claim 6, wherein the outer diameter side tapered surface that is the outer diameter side tapered surface of the cage is obtained by processing.

The first gripping member has a second gripping part that extends in a radial direction and grips the axial one end machining surface of the material.
The radial width of the second grip portion is equal to or less than the radial width of the axial end surface of the cage,
The inner diameter side which becomes the inner diameter side tapered surface of the cage by cutting the inner peripheral surface of the material while gripping the one end processing surface in the axial direction and the cylindrical processing surface on the outer diameter side with the first gripping member. The method for manufacturing a cage according to claim 7, further comprising a step of obtaining a tapered surface and an inner diameter side cylindrical surface that is an inner diameter side cylindrical surface of the cage.

While gripping the axial one end processed surface and the outer diameter side cylindrical processed surface by the second gripping member, the inner peripheral surface of the material is cut to process the inner diameter side taper surface of the cage The method for manufacturing a cage according to claim 6, further comprising a step of obtaining a tapered surface and an inner diameter side cylindrical surface that becomes an inner diameter side cylindrical surface of the cage.

A large-diameter annular portion located on one end side in the axial direction, a small-diameter annular portion located on the other end side in the axial direction, a plurality of column portions connecting the large-diameter annular portion and the small-diameter annular portion in the axial direction, and the large-diameter portion A retainer for a bearing device having a plurality of pocket portions each configured to hold a ball, which is defined by a circular annular portion and the small-diameter annular portion and the column portion adjacent in the circumferential direction, and a cylindrical material. In the gripping member that grips the material when obtained by cutting,
The outer peripheral surface of the cage is composed of an outer diameter side cylindrical surface which is an outer peripheral surface of the large diameter annular portion, and an outer diameter side tapered surface which is an outer peripheral surface of the column portion and the small diameter annular portion,
The inner peripheral surface of the cage is composed of an inner diameter side cylindrical surface that is an inner peripheral surface of the small diameter annular portion, and an inner diameter side tapered surface that is an inner peripheral surface of the pillar portion and the large diameter annular portion,
The gripping member has a first gripping part that extends in the axial direction and grips the material from the outer diameter side,
The holding member according to claim 1, wherein an axial width of the first holding portion is equal to or less than an axial width of the outer cylindrical surface of the retainer.

The grip member has a second grip portion that extends in a radial direction and grips the material from one end side in the axial direction.
The gripping member according to claim 10, wherein a radial width of the second gripping portion is equal to or less than a radial width of one axial end surface of the cage.