JP2011127713A - Retainer for ball bearing, and ball bearing with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retainer for a ball bearing easy to be manufactured and capable of reducing the oil film amount to be formed between balls. <P>SOLUTION: This retainer 10 includes pockets 15 for respectively retaining a ball 4 with an equal interval between the circumferential direction. Resin segments 11 respectively formed with a ball retaining surface 14 for retaining the ball 4 in both ends in the circumferential direction thereof are arranged spaced apart in the circumferential direction so that the opposite ball retaining surfaces 14 and 14 of adjacent two segments 11 and 11 form the pocket 15. Further, the retainer 10 has an annular regulating member 20 for regulating displacement of each segment 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a ball bearing retainer and a ball bearing including the same, and more particularly to a ball bearing retainer incorporated in an electrical component or an accessory part of an automobile and a ball bearing including the same.

  Rolling bearings for supporting a rotating shaft, which is driven to rotate by the output of the engine, rotatably with respect to a stationary member are used for electric parts and auxiliary parts of automobiles such as idler pulleys, alternators, electromagnetic clutches, fan clutches, etc. It has been incorporated. As a rolling bearing for this type of application, a ball bearing 101 as shown in FIG. 11 is widely used (see, for example, Patent Document 1).

  The ball bearing 101 shown in FIG. 11 includes an inner ring 102 having an inner race 102a formed on the outer diameter surface, an outer ring 103 disposed on the outer side in the radial direction of the inner ring 102, and an outer race 103a formed on the inner diameter surface, and the inner ring 102. Is provided between the inner race 102a and the outer race 103a of the outer ring 103 so as to roll freely, and between the inner ring 102 and the outer ring 103, and holds the balls 104 at equal intervals in the circumferential direction. The main part is composed of the resin cage 105. In this ball bearing 101, an outer ring 103 is mounted on a stationary member such as a housing (not shown) to constitute a stationary side, and an inner ring 102 is attached to a rotating shaft (not shown) that rotates by engine output to constitute a rotating side. .

  As the cage 105 incorporated in the ball bearing 101, a so-called crown type is often used. Specifically, as shown in FIG. 12, recesses 107 are provided at one end surface in the axial direction of the annular main portion 106 at equal intervals in the circumferential direction, and at the opening end facing the circumferential direction of the recess 107 in the axial direction. A pair of elastic pieces 108, 108 extending is provided, and bottomed pockets 109 having one end opened by the recess 107 and the pair of elastic pieces 108, 108 are provided at equal intervals in the circumferential direction. The ball 104 disposed between the inner track 102 a of the inner ring 102 and the outer track 103 a of the outer ring 103 is held in a pocket 109 of the cage 105 so as to be freely rollable.

  In the ball bearing 101 configured as described above, an annular space formed between the inner ring 102 and the outer ring 103 is filled with a lubricant such as grease, whereby internal lubrication of the ball bearing 101 is performed. On both axial sides of the annular space formed between the inner ring 102 and the outer ring 103, seal members 110, 110 are provided to prevent external leakage of the lubricant filled in the annular space and entry of foreign matter into the annular space, respectively. Are arranged (see FIG. 11).

JP 2001-241448 A

  In recent years, there has been a strong demand for improving the fuel efficiency of automobiles, and it has become necessary to strongly promote the reduction in torque of ball bearings incorporated in automobile parts. The ball bearing torque accounts for a large proportion of oil shear resistance accompanying ball rolling. Most of the shear resistance is generated when an oil film formed between the pocket inner surface (ball facing surface) and the ball is sheared along with the ball rolling.

  As is clear from FIG. 11, the conventional cage has a uniform thickness t of the main portion 106 and the elastic piece 108 (thickness of the cage) from the bottom side of the pocket 109 to the opening side of the pocket 109. The ball facing area (ball contact area) of the pocket 109 is also uniform from the bottom side of the pocket 109 to the opening side of the pocket 109. Therefore, when the ball bearing 101 is driven and the ball 104 rolls in the pocket 109, a large shear resistance is generated between the pocket 109 and the ball 104, and the ball bearing 101 is likely to have a high torque. .

  In addition, since the demand for cost reduction for this type of ball bearing is becoming stricter, it is necessary to further reduce the cost of the cage that is one of the components of the ball bearing. However, the conventional cage 105 described above has a complicated shape in which a plurality of concave portions 107 and elastic pieces 108 are provided along the circumferential direction of the main portion 106. Therefore, it is actually difficult to reduce costs because special consideration is required to ensure a predetermined molding accuracy.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide an easily manufactured ball bearing retainer capable of reducing the amount of oil film formed between the balls, This contributes to lowering the torque and cost of the ball bearing.

  The present invention made to achieve the above object is a ball bearing retainer in which pockets for holding balls are provided at equal intervals in the circumferential direction, and ball holding surfaces are formed at both ends in the circumferential direction. The formed resin segments are spaced apart from each other in the circumferential direction, and pockets are formed by opposing ball holding surfaces of two adjacent segments.

  As described above, the ball bearing cage according to the present invention (hereinafter simply referred to as a cage) has pockets formed by opposing ball holding surfaces of two adjacent segments that are spaced apart in the circumferential direction. It is. Therefore, a gap is formed between two adjacent segments, and the facing area (contact area) between the pocket inner surface and the ball is reduced by this gap compared to the conventional cage shown in FIG. Accordingly, the amount of oil film formed between the inner surface of the pocket and the ball accommodated in the pocket can be reduced as compared with the conventional case, so that the shear resistance generated when shearing the oil film is reduced as compared with the conventional case. be able to. As a result, the torque of the ball bearing can be reduced.

  Further, each segment constituting the cage is reduced in size and simplified in shape as compared with the conventional cage, so that the weight can be reduced and a predetermined molding accuracy can be easily ensured. . Therefore, the manufacturing cost can be reduced as compared with the conventional product which has a complicated shape and is difficult to mold.

  Furthermore, since a gap is provided between two adjacent segments, the gap can absorb stress and vibration that repeatedly act on the pocket (cage) during bearing operation. As a result, the possibility of deformation or breakage in the cage (segment) can be effectively reduced, so that the durable life of the ball bearing can be improved.

  Each segment constituting the cage may have a main portion extending in the circumferential direction and a pair of elastic pieces protruding in the axial direction from both circumferential ends of the main portion. The pair of elastic pieces provided in each segment can project from one side in the axial direction of the main part, or can project from both sides in the axial direction of the main part. In particular, if the pair of elastic pieces protrudes on both sides in the axial direction of the main part and the protruding amounts of both elastic pieces are set equal, the segment can be made symmetrical with the main part interposed therebetween. In this case, there is an advantage that it is not necessary to consider the directionality when the cage (segment) is assembled between the inner and outer rings.

  The inner and outer diameter surfaces of each segment can be formed on arc surfaces parallel to each other along the inner and outer diameter surfaces of the inner ring and straight surfaces parallel to each other. You can also. If the inner diameter surface and outer diameter surface of each segment are formed on straight surfaces parallel to each other, the molding of each segment can be facilitated and the die cost can be reduced.

  By the way, especially when the load capacity of the ball bearing is large or when the ball bearing (rotating ring) has a high rotational speed, a cage composed of only the segments spaced apart in the circumferential direction as described above is used. The segments may fall in the axial direction, the diameter may be expanded (moved in the radial direction) by centrifugal force, or the placement balance may be lost due to the delay of the ball. Such various displacements of the segment become a factor that destabilizes the behavior of the ball, that is, a factor that deteriorates the bearing performance. Therefore, the cage according to the present invention can further include an annular regulating member that regulates the displacement of each segment and holds each segment in a predetermined position and posture. As a result, it is possible to prevent the above-described problem from occurring as much as possible, to improve the holding and guiding accuracy of the ball, and to stabilize the bearing performance.

  The method for fixing the segment and the regulating member is arbitrary. For example, a circumferential groove may be provided in each segment, and a regulating member may be fitted and fixed in the circumferential groove, or each segment may be injection molded with resin using the regulating member as an insert part. In particular, if each segment is injection-molded with resin using the restricting member as an insert part, the molding of the segment and the positioning and fixing of the segment to the restricting member can be completed at the same time, improving cage accuracy and reducing manufacturing costs. Can be achieved simultaneously.

  The restricting member may be formed of a wire material, or may be formed of a plate material (wider than the wire material).

  The resin material used for molding each segment is not particularly limited as long as it satisfies the required mechanical strength, wear resistance, heat resistance, oil resistance, moldability, and the like. For example, a resin material based on one resin selected from the group of polyamide resin (PA), polyether ether ketone resin (PEEK), polyphenylene sulfide resin (PPS), and phenol resin is suitable.

  The cage according to the present invention described above can be configured as a ball bearing by combining an inner ring and an outer ring and a plurality of balls incorporated between the raceways of the inner and outer rings. In this ball bearing, the cage Exhibits a function of holding a plurality of balls at equal intervals in the circumferential direction. Since this ball bearing has the characteristics of low torque and low cost, it is necessary to reduce the torque and cost of automobiles and auxiliary parts such as idler pulleys, alternators, electromagnetic clutches and fans. It is suitable as a bearing for a clutch.

  As described above, according to the present invention, it is possible to provide an easily manufactured ball bearing retainer that can reduce the amount of oil film formed between the balls. Thereby, it can contribute to the reduction in torque and cost of the ball bearing at the same time.

It is a sectional view of a ball bearing incorporating a retainer concerning one embodiment of the present invention. It is a schematic perspective view of the holder | retainer shown in FIG. (A) The figure is an expansion perspective view of the segment which comprises the holder | retainer shown in FIG. 2, (b) The figure is the top view which looked at the segment shown to (a) figure from the arrow A direction. It is a top view when the holder shown in Drawing 1 is seen from the pocket bottom side. It is a schematic perspective view of the holder | retainer which concerns on other embodiment of this invention. It is a modification of a segment. (A)-(c) figure is all the principal part expanded sectional views of the holder | retainer which used the segment shown in FIG. 6 as a component. It is a modification of a segment. It is a schematic perspective view of the holder | retainer which concerns on other embodiment of this invention. It is a figure which shows the calculation result for demonstrating the usefulness of this invention. It is sectional drawing of the ball bearing which used the conventional cage | basket as a component. It is a schematic perspective view of the holder | retainer integrated in the ball bearing shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a ball bearing 1 incorporating a ball bearing cage (hereinafter simply referred to as a cage) according to an embodiment of the present invention. The ball bearing 1 shown in the figure includes an inner ring 2 having an inner raceway 2a formed on an outer diameter surface, an outer ring 3 having an outer raceway 3a formed on an inner diameter surface, an inner race 2a of the inner ring 2 and an outer raceway of the outer ring 3. Main components are a ball 4 that is freely rollable between the inner ring 2 and the outer ring 3 and a cage 10 that holds the balls 4 at equal intervals in the circumferential direction. Prepare as. In the ball bearing 1, an inner ring 2 is mounted on a rotating shaft (not shown) to form a rotating side, and an outer ring 3 is mounted to a stationary member such as a housing (not shown) to form a stationary side.

  An annular space 5 formed between the inner ring 2 and the outer ring 3 is filled with grease as a lubricant, whereby internal lubrication of the ball bearing 1 is performed. Seal members 6 and 6 are provided on both axial sides of the annular space 5 formed between the inner ring 2 and the outer ring 3 in order to prevent external leakage of grease filled in the annular space 5 and entry of foreign matter into the annular space. Has been placed. Each of the seal members 6 and 6 in the illustrated example includes a cored bar 7 and an elastic portion 8 vulcanized and bonded to the surface thereof, and a seal lip 9 constituted by the elastic portion 8 is a rotating wheel (in this case, the inner ring 2). The sealing property is ensured by contacting the surface. Although the seal members 6 and 6 in the illustrated example are so-called contact types, a so-called non-contact type such as the seal member 110 shown in FIG. 11 can be adopted as the seal member.

  Hereinafter, the configuration of the cage 10 will be described in detail.

  FIG. 2 is a schematic perspective view of the cage 10 incorporated in the ball bearing 1 shown in FIG. As shown in the figure, the retainer 10 includes a plurality of segments (retainer pieces) 11 arranged along the circumferential direction, and an annular regulating member 20 fixed to each segment 11. Provide as a member. Two segments 11 and 11 adjacent in the circumferential direction are spaced apart from each other in the circumferential direction so as not to contact each other.

  As shown in enlarged views in FIGS. 3 (a) and 3 (b), the segment 11 is an arcuate member in which the inner diameter surface 11a and the outer diameter surface 11b are formed on arc surfaces parallel to each other. A main portion 12 having a circular arc plate shape having a predetermined thickness and a pair of elastic pieces 13 and 13 projecting from one end and the other end of the main portion 12 in the axial direction are integrally formed. It is a resin injection molded product. At both ends in the circumferential direction of the segment 11, there are provided ball holding surfaces 14 and 14 each having a concave spherical shape along the outer diameter of the ball 4 to be held, and the two segments 11 and 11 adjacent to each other are provided. A pocket 15 for accommodating and holding the ball 4 is formed by the ball holding surfaces 14 and 14 facing each other. In the present embodiment, the elastic pieces 13 and 13 are curved in a direction away from each other toward the one side in the axial direction (on the side opposite to the main portion 12), and the outer surface thereof is formed into a concave spherical shape. A ball holding surface 14 is formed by recessing a spherical portion connected to the outer surface of the elastic piece 13 on the side surface.

  As shown in FIG. 4, two arc-shaped concave grooves 16 are provided on the bottom surface of the segment 11 (the end surface opposite to the side on which the elastic piece 13 is provided). The restricting member 20 is fixed to. The regulating member 20 plays the role of regulating the displacement of each segment 11 and holding each segment 11 in a predetermined position / posture, and is formed of an annular wire here. The wire constituting the restricting member 20 is capable of restricting the displacement of the segment 11 that adversely affects the holding and guiding performance of the ball 4 when stress or centrifugal force acts on the segment 11. If it does not specifically limit. For example, a wire made of iron, steel, stainless steel, or aluminum can be used.

  The cage 10 according to the present invention having the above-described configuration is obtained by individually fitting and fixing the regulating member 20 separately prepared and prepared in the concave groove 16 of each segment 11 after the segments 11 are individually injection-molded. . At this time, each segment 11 is not in contact with the adjacent segment 11 (so that a predetermined pocket 15 is formed by the ball holding surfaces 14 and 14 opposite to each other of the two adjacent segments 11 and 11). The fixing member 20 is fixed at an appropriate position in the circumferential direction.

  The resin material for forming the segment 11 is not particularly limited as long as it is based on a resin that can satisfy the required mechanical strength, wear resistance, heat resistance, oil resistance, moldability, and the like. For example, one resin selected from the group of polyamide resin (PA), polyether ether ketone resin (PEEK), polyphenylene sulfide resin (PPS), and phenol resin can be used as the base resin. The resin material for molding the segment 11 can be appropriately mixed with various fillers that can add various properties such as a reinforcing material, a release agent, a weather resistance improver, an antioxidant, and a dimension stabilizer.

  As described above, the cage 10 according to the present invention has the resin segments 11 having the ball holding surfaces 14 and 14 formed at both ends in the circumferential direction, spaced apart in the circumferential direction and adjacent to each other. A pocket 15 for holding the ball 4 is formed by the ball holding surfaces 14 and 14 of the two segments 11 and 11 facing each other. In this way, a gap C as shown in FIG. 4 can be formed between two adjacent segments 11. Then, the facing area (contact area) between the inner surface of the pocket 15 and the ball 4 is reduced by an amount corresponding to the gap C as compared with the conventional product shown in FIG. Accordingly, the amount of oil film formed between the inner surface of the pocket 15 and the ball 4 accommodated in the pocket 15 can be reduced as compared with the conventional case, so that the shear resistance generated when shearing the oil film is lower than before. Can be reduced. As a result, the torque of the ball bearing 1 can be reduced.

  Further, each segment 11 constituting the cage 10 of the present invention is greatly reduced in size and simplified in shape as compared with the conventional cage, and therefore it is easy to ensure a predetermined molding accuracy. is there. Therefore, the manufacturing cost can be reduced and the yield can be improved as compared with the conventional product which has a complicated shape and is difficult to mold.

  Furthermore, since the gap C is provided between the two adjacent segments 11, 11, the gap C can absorb stress and vibration that repeatedly act on the cage 10 (pocket 15) during bearing operation. As a result, the possibility of deformation or breakage of the cage 5 can be effectively reduced, so that the durable life of the ball bearing 1 can be improved.

  In particular, when the load capacity of the ball bearing 1 is large or when the ball bearing 1 (the inner ring 2 which is a rotating ring) is at a high rotational speed, the cage 10 is configured only by the segments 11 that are spaced apart in the circumferential direction. Then, there is a possibility that each segment 11 falls in the axial direction, expands in diameter (moves in the radial direction) due to centrifugal force, or the arrangement balance is lost due to the advance and delay of the balls 4. Such various displacements of the segment 11 become a factor that destabilizes the behavior of the ball 4, that is, a factor that deteriorates the bearing performance. On the other hand, if the above-described regulating member 20 is provided in the cage 10, the occurrence of the above-described problems can be prevented as much as possible. Thereby, since the holding | maintenance and guidance precision of the ball | bowl 4 can be improved, the bearing performance is stabilized.

  As described above, the cage 10 and the ball bearing 1 incorporating the cage 10 according to an embodiment of the present invention have been described, but various modifications can be made to the cage 10. Hereinafter, although the holder | retainer 10 which concerns on other embodiment of this invention is demonstrated, a common reference number is attached | subjected to the substantially same member and site | part as what was demonstrated above, and duplication description is abbreviate | omitted.

  FIG. 5 is a schematic perspective view of the cage 10 according to the second embodiment of the present invention. The main point of the cage 10 shown in the figure different from that shown in FIG. 2 is that a regulating member 20 that regulates the displacement of each segment 11 is formed of a wide plate material having an annular shape, and the regulating member 20 is inserted into the cage 10. As a part, each segment 11 is injection-molded with resin.

  Thus, if each segment 11 is injection-molded with resin using the regulating member 20 as an insert part, the molding of the segment 11 and the positioning and fixing of each segment 11 with respect to the regulating member 20 can be completed simultaneously. Therefore, compared with the case where the regulating member 20 is fitted and fixed to the circumferential groove 16 of the segment 11 manufactured individually, the accuracy of the cage 10 can be improved and the manufacturing cost can be reduced.

  In addition, it cannot be overemphasized that each segment 11 can also be injection-molded with resin also about the retainer 10 which concerns on 1st Embodiment of this invention shown in FIG. 2 by using the control member 20 as an insert component. On the contrary, in the cage 10 shown in FIG. 5, after the segments 11 having the circumferential grooves 16 are individually injection-molded, the regulating members 20 formed of an annular plate material are fitted into the circumferential grooves 16 of each segment 11. It can also be obtained by fixing together.

  The segment 11 constituting the cage 10 described above includes a main portion 12 and a pair of elastic pieces 13 and 13 projecting from one end and the other end in the circumferential direction of the main portion 12 on one side in the axial direction. As shown in FIG. 6, a pair of elastic pieces 13, 13 is a shaft from one end and the other end in the circumferential direction of the main portion 12. It is also possible to use one projecting on both sides in the direction. In this case, as is apparent from the figure, the weight of each segment 11 and thus the cage 10 can be reduced by the amount of the volume of the main portion 12 being reduced. Further, the segment 11 shown in FIG. 6 has a symmetrical shape in which the protruding amounts of the elastic pieces 13 and 13 on both axial sides are equal. Such a segment 11 has an advantage that it is not necessary to consider the directionality when the segment 11 (the cage 10) is assembled between the inner and outer rings.

  As a fixing aspect of the restricting member 20 with respect to the segment 11 shown in FIG. 6, what is shown, for example to FIG.7 (a)-(c) is employable. In FIG. 7A, a circumferential groove 16 is formed on the surface of one side in the axial direction of the segment 11 (main portion 12 and elastic pieces 13, 13) along the cross-sectional shape of the main portion 12 and elastic pieces 13, 13. In this example, the regulating member 20 is fitted and fixed to the circumferential groove 16. FIG. 7B shows that circumferential grooves 16 and 16 are formed on the surfaces on both sides in the axial direction of the segment 11 so as to follow the cross-sectional shapes of the main portion 12 and the elastic pieces 13 and 13, respectively. 16 is an example in which the restricting members 20 and 20 are fitted and fixed to each other. FIG. 7C shows a regulating member 20 having a ring shape as a whole and having a three-dimensional shape portion along the cross-sectional shape of the segment 11 (the main portion 12 and the elastic pieces 13 and 13) at a portion where the segment 11 is fixed. Is an insert part and each segment 11 is injected with resin.

  Further, the segment 11 constituting the cage 10 described above has an inner diameter surface 11a and an outer diameter surface 11b formed in arc surfaces parallel to each other. As shown in FIG. It is also possible to use the inner surface 11a and the outer surface 11b formed on straight surfaces parallel to each other. In this case, there is an advantage that the segment 11 can be easily formed as compared with the case where the inner diameter surface 11a and the outer diameter surface 11b are formed in arcuate surfaces parallel to each other.

  The cage 10 according to the present invention described above includes a plurality of segments 11 that are spaced apart from each other in the circumferential direction and a regulating member 20 that regulates the displacement of the segments 11. As described above, the cage 10 according to the present invention can be configured by only a plurality of segments 11 that are spaced apart in the circumferential direction. In this case, it is possible to further reduce the cost and weight of the retainer 10 as much as the restricting member 20 is eliminated. However, as the regulating member 20 is removed, the cage 10 is easily deformed by the stress or centrifugal force acting during the bearing operation (the segment 11 is easily displaced), and the behavior of the ball 4 becomes unstable. there's a possibility that. 9 is suitable for a ball bearing having a relatively small load capacity and a ball bearing having a relatively low rotational speed.

  Since the ball bearing 1 incorporating the cage 10 according to the present invention described above has low torque and low cost, it is suitable for machine parts that are demanded to reduce torque and cost. Examples of such mechanical parts include automobile electrical parts and auxiliary machine parts such as idler pulleys, alternators, electromagnetic clutches, fan clutches, and the like.

In order to demonstrate the usefulness of the present invention,
(1) Ball contact area of conventional cage pocket shown in FIG. 12: S
(2) Ball contact area of the cage pocket of the present invention shown in FIG.
(3) Torque of ball bearing incorporating the conventional product shown in FIG.
(4) Torque of ball bearing incorporating the product of the present invention shown in FIG.
FIG. 10 shows the results of calculating the relationship between the ball contact area and the ball bearing torque under the conditions of rotational speed: 5000 rpm, radial load: 100 N, and lubricant temperature: 40 ° C.

  As is apparent from the calculation results shown in FIG. 10, it can be seen that the torque of the ball bearing decreases as the amount of decrease in the ball contact area of the pocket increases. Therefore, the usefulness of the present invention is demonstrated.

1 Ball Bearing 2 Inner Ring 3 Outer Ring 4 Ball 10 Cage (Bag Bearing Cage)
11 segment 12 main part 13 elastic piece 14 ball holding surface 15 pocket 16 concave groove 20 regulating member C gap

Claims (13)

A ball bearing cage in which pockets for holding balls are provided at equal intervals in the circumferential direction,
Resin segments having ball holding surfaces formed at both ends in the circumferential direction are arranged in the circumferential direction so as to be spaced apart from each other, and the pockets are formed by the ball holding surfaces facing each other between two adjacent segments. Ball bearing cage.   2. The ball bearing according to claim 1, wherein each segment includes a main portion extending in a circumferential direction and a pair of elastic pieces projecting in an axial direction from both circumferential ends of the main portion. Retainer.   The ball bearing retainer according to claim 2, wherein the pair of elastic pieces protrudes on one side in the axial direction of the main portion.   The ball bearing retainer according to claim 2, wherein the pair of elastic pieces protrudes on both axial sides of the main portion.   The ball bearing retainer according to any one of claims 1 to 4, wherein an inner diameter surface and an outer diameter surface of each segment are formed on straight surfaces parallel to each other.   The ball bearing retainer according to any one of claims 1 to 6, further comprising an annular regulating member that regulates the displacement of each segment.   The ball bearing retainer according to claim 6, wherein each segment is provided with a circumferential groove, and the regulating member is fitted and fixed in the circumferential groove.   The ball bearing retainer according to claim 6, wherein the segments are injection-molded with resin using the regulating member as an insert part.   The ball bearing retainer according to any one of claims 6 to 8, wherein the regulating member is formed of a wire rod.   The ball bearing retainer according to any one of claims 6 to 8, wherein the regulating member is formed of a plate material.   Each said segment was injection-molded with the resin material which used as a base resin one resin selected from the group of a polyamide resin, polyetheretherketone resin, polyphenylene sulfide resin, and a phenol resin. The ball bearing retainer according to item.   An inner ring and an outer ring, and a plurality of balls incorporated between the races of the inner and outer rings, and the balls are held at equal intervals in the circumferential direction by the ball bearing retainer according to any one of claims 1 to 11. Ball bearing.   The ball bearing according to claim 12, which is incorporated in an electrical component or auxiliary component of an automobile.

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