Angular contact ball bearing retainer, retainer injection molding device and angular contact ball bearing

Abstract

The utility model provides an angular contact ball bearing retainer, retainer injection molding device and angular contact ball bearing, wherein the bearing retainer comprises an annular frame body, a plurality of pockets are constructed on the annular frame body, each pocket penetrates through the inner and outer ring wall surfaces of the annular frame body along the radial direction of the annular frame body, and the pockets are uniformly arranged at intervals along the circumferential direction of the annular frame body; each pocket is defined by two oppositely-arranged planes and two oppositely-arranged cylindrical arc faces, the two planes are parallel to the radial face of the annular frame body, the two cylindrical arc faces are located on the same cylindrical face, and the axis of the cylindrical face is parallel to the central axis of the annular frame body. According to the utility model, the grease storage space in the pocket is increased, so that the lubricating effect on the rolling ball is improved; the contact area between the rolling ball and the retainer in the circumferential direction of the retainer during bearing operation is reduced, friction heat is reduced, and grease denaturation caused by too high temperature is avoided; the lateral force effect of the retainer on the rolling balls during bearing operation is eliminated, the stability of the bearing is improved, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing manufacturing, and specifically relates to an angular contact ball bearing retainer, a retainer injection molding device, and an angular contact ball bearing. Background Art

[0002] A bearing cage is a bearing component that partially wraps all or part of the rolling elements and moves with them. It can isolate the rolling elements and usually guide the rolling elements and keep them in the bearing. It is an important component of the rolling bearing and its quality has a direct impact on the bearing accuracy.

[0003] Existing angular contact ball bearing cage pocket designs mostly use round straight-through holes (such as Figure 1 as shown) or spherical pockets (as shown Figure 2 As shown in the figure). In the existing circular or spherical pocket design, the pocket completely wraps the ball, and the ball has only a limited pocket gap in the pocket. This pocket structure has the following disadvantages: (1) The oil storage space in the pocket is insufficient, which affects the lubrication effect; (2) During the operation of the bearing, when the ball rolls in the circumferential direction, the ball and the retaining frame have an arc surface contact at the maximum circumference of the pocket, which has a large contact area and high friction, and is prone to frictional heat generation; (3) In the case of a circular or spherical pocket, the front edge of the ball and the retaining frame are in arc surface contact. In addition to being subjected to the positive force in the circumferential direction, they are also subjected to the lateral force component, which will cause vibration and noise of the bearing. Utility Model Content

[0004] Therefore, the utility model provides an angular contact ball bearing cage, a cage injection molding device, and an angular contact ball bearing, which can overcome the shortcomings of the prior art, such as insufficient oil storage space in the cage pockets resulting in poor lubrication effect, arc surface contact between the ball and the pockets during bearing operation resulting in severe frictional heat generation, and lateral force generated by the pockets on the balls resulting in bearing vibration and noise.

[0005] In order to solve the above problems, the utility model provides an angular contact ball bearing retainer, including an annular frame body, on which a plurality of pockets are constructed, each of the pockets penetrating the inner and outer ring walls of the annular frame body in the radial direction of the annular frame body, each of the pockets being evenly spaced along the circumference of the annular frame body, each of the pockets being formed by two oppositely arranged planes and two oppositely arranged cylindrical arc surfaces, wherein the two planes are parallel to the radial plane of the annular frame body, the two cylindrical arc surfaces are on the same cylindrical surface, and the axis of the cylindrical surface is parallel to the central axis of the annular frame body.

[0006] In some embodiments, the distance b between the two planes in the axial direction of the annular frame is defined as the inner diameter of the pocket, the diameter of the ball accommodated in the pocket is q, (bq) is the pocket gap, and 0.1mm≤(bq)≤0.9mm.

[0007] In some embodiments, the diameter of the cylindrical arc surface is D, 1≤D / b≤1.03; and / or,

[0008] There is a transition chamfer r between the adjacent planes and the cylindrical arc surface, and b / 10≤r≤b / 5.

[0009] In some embodiments, when the inner ring diameter m of the angular contact ball bearing retainer is greater than 150 mm, 1<D / b≤1.03.

[0010] In some embodiments, each pocket has an outer locking opening on the outer ring wall surface of the annular frame and an inner locking opening on the inner ring wall surface of the annular frame, wherein the minimum distance between the outer locking opening and the intersection line of the two cylindrical arc surfaces is L1, 95%q≤L1≤97%q; the minimum distance between the inner locking opening and the intersection line of the two cylindrical arc surfaces is L2, 90%q≤L2≤93%q.

[0011] In some embodiments, the plane adjacent to the first end face of the annular frame is a first plane, and the plane adjacent to the second end face of the annular frame is a second plane, wherein a radially outer region of the first plane is connected to the first end face, and a radial thickness of the radially outer region is θ1, a radially inner region of the second plane is connected to the second end face, and a radial thickness of the radially inner region is θ2, and the radial thickness of the annular frame is θ, θ1+θ2=θ.

[0012] In some embodiments, the radial thickness of the radial outer region θ1 is greater than the radial thickness of the radial inner region θ2; and / or, there is a partition beam between two adjacent pockets, and the end of the partition beam corresponding to the first plane and / or the second plane has an inclined notch.

[0013] The utility model also provides an injection molding device for manufacturing the above-mentioned angular contact ball bearing retainer, comprising:

[0014] A male mold, wherein the male mold has a cylindrical inner mold core, and the outer cylindrical wall surface of the cylindrical inner mold core has a plurality of inner pocket hole forming mold pieces evenly spaced along the circumferential direction thereof;

[0015] A concave mold, wherein the concave mold has an annular outer mold core, and the inner cylindrical wall surface of the annular outer mold core has a plurality of outer pocket hole forming mold pieces evenly spaced along the circumferential direction thereof;

[0016] The male mold and the female mold have a closed mold state and an open mold state. When in the closed mold state, the annular outer mold core is buckled on the radially outer side of the cylindrical inner mold core to form an injection cavity therebetween. Each of the inner pocket hole molding mold pieces corresponds to each of the outer pocket hole molding mold pieces one by one and is stacked inside and outside. The outer contours of the stacked inner pocket hole molding mold pieces and outer pocket hole molding mold pieces are consistent with the hole shape of the pocket holes.

[0017] In some embodiments, the punch is a movable mold, the die is a fixed mold, a runner is formed on the end surface of the cylindrical inner mold core facing the die, the runner includes a central runner based on a branch runner constructed in the cylindrical inner mold core and extending radially outward to the area between two adjacent inner pocket hole molding mold pieces, and the die has a gate sleeve that penetrates the central runner.

[0018] The utility model also provides an angular contact ball bearing, comprising a retaining frame, and the retaining frame is the above-mentioned angular contact ball bearing retaining frame.

[0019] The utility model provides an angular contact ball bearing cage, a cage injection molding device, and an angular contact ball bearing, wherein the pocket is formed by two relatively parallel planes and two cylindrical arc surfaces whose axes are parallel to the central axis of the annular frame and relatively arranged, which can significantly increase the grease storage space in the pocket, which is beneficial to improving the lubrication effect on the rolling sphere (i.e., the ball), thereby improving the stability of the bearing and the service life of the bearing; it can reduce the contact area between the ball and the cage in the circumferential direction of the cage when the bearing is running, reduce frictional heat, and avoid grease degeneration caused by excessive temperature, which also improves the operating reliability and service life of the bearing; more importantly, it can also eliminate the lateral force of the cage on the ball when the bearing is running, avoid the interference of the lateral force on the movement of the ball, thereby reducing the generation of vibration and noise during the operation of the bearing, and further improve the stability of the bearing and the service life of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a three-dimensional structure of an angular contact ball bearing cage in the prior art, and the pocket hole in the figure is a circular straight through hole;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of another angular contact ball bearing cage in the prior art, and the pocket hole in the figure is a spherical pocket hole;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of an angular contact ball bearing cage in one embodiment of the utility model;

[0023] Figure 4 for Figure 3Schematic diagram of the partial structure of the angular contact ball bearing cage;

[0024] Figure 5 for Figure 3 Angular contact ball bearing cage profile (radial section) in;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of an angular contact ball bearing cage in another embodiment of the utility model;

[0026] Figure 7 for Figure 3 Schematic diagram of the manufacturing state of the angular contact ball bearing cage;

[0027] Figure 8 for Figure 6 A schematic diagram of the manufacturing status of the angular contact ball bearing cage in the figure shows a disassembled schematic diagram of some components of the corresponding cage injection molding device (the inner pocket hole molding die piece and the outer pocket hole molding die piece in the figure are only disassembled for illustration, and the flow channel in the figure is only a schematic diagram and does not represent its actual structure, that is, it can objectively be a pipeline structure constructed in the cylindrical inner mold core).

[0028] The reference numerals are:

[0029] 1. Ring frame; 11. Pocket hole; 12. Plane; 13. Cylindrical arc surface; 14. Separation beam; 141. Inclined notch; 21. External locking mouth; 22. Internal locking mouth; 100. Punch; 101. Cylindrical inner mold core; 102. Inner pocket hole forming mold piece; 103. Runner; 1031. Central runner; 1032. Branch runner; 200. Concave mold; 201. Ring outer mold core; 202. Outer pocket hole forming mold piece; 203. Gate sleeve; 300. Retaining frame; 400. External draw-out mold core. DETAILED DESCRIPTION

[0030] See also Figures 3 to 8As shown, according to an embodiment of the utility model, an angular contact ball bearing retainer is provided, comprising an annular frame 1, wherein the annular frame 1 is provided with a plurality of pockets 11, wherein each pocket 11 penetrates the inner and outer ring walls of the annular frame 1 in the radial direction of the annular frame 1, wherein each pocket 11 is evenly spaced along the circumference of the annular frame 1, and each pocket 11 is surrounded by two oppositely disposed planes 12 and two oppositely disposed cylindrical arc surfaces 13, wherein the two planes 12 are parallel to the radial surface of the annular frame 1. The two cylindrical arc surfaces 13 are located on the same cylindrical surface, and the axis of the cylindrical surface is parallel to the central axis of the annular frame 1. It should be noted that the aforementioned radial surface is any plane perpendicular to the central axis of the annular frame 1, such as the two end surfaces of the annular frame 1 (that is, the first end surface and the second end surface recorded later). It can be understood that a partition beam 14 is formed between two adjacent pockets 11, and the aforementioned two cylindrical arc surfaces 13 are respectively formed on the opposite sides of two adjacent partition beams 14.

[0031] In this technical solution, the pocket 11 is formed by two relatively parallel planes 12 and two cylindrical arc surfaces 13 whose axes are parallel to the central axis of the annular frame 1 and are relatively arranged. This can significantly increase the grease storage space in the pocket 11, which is beneficial to improving the lubrication of the rolling sphere (i.e., the ball), thereby improving the stability of the bearing and the service life of the bearing; it can reduce the contact area between the ball and the cage in the circumferential direction of the cage when the bearing is running, reduce frictional heat, and avoid grease degeneration caused by excessive temperature, which also improves the operating reliability and service life of the bearing; more importantly, it can also eliminate the lateral force of the cage on the ball when the bearing is running, avoid the interference of the lateral force on the movement of the ball, thereby reducing the generation of vibration and noise during the operation of the bearing, and further improve the stability of the bearing and the life of the bearing.

[0032] Specifically, the pocket hole 11 in the utility model is square in a cross section perpendicular to its depth direction when the size matches, while the corresponding cross section of the circular through hole or spherical pocket hole in the prior art is circular. It can be understood that the pocket hole 11 of the utility model has a larger grease storage space when the pocket hole 11 is inscribed in a circle in terms of size; and because the two planes 12 in the present application are respectively parallel to the radial plane of the annular frame 1, during the circumferential operation of the bearing, the two planes will not form a lateral force on the ball that forms an angle with its rolling direction, thereby not interfering with the movement trajectory of the ball, and reducing the vibration and noise of the bearing operation; Figure 1The cylindrical axis of the circular through hole shown in the figure is perpendicular to the central axis of the annular frame 1, and the pocket hole partially wraps the ball. The ball intersects with the circular pocket hole in the forward direction, that is, in the circumferential direction, as a short arc. The orientation of the short arc is perpendicular to the forward direction of the ball. The rolling ball slides on the front wall of the pocket hole to produce arc scratches, that is, the ball and the circular pocket hole are in arc contact. Figure 2 The spherical pocket shown in the figure wraps the ball in all directions, and the ball intersects with the spherical pocket in the forward direction, i.e., the circumferential direction, to form an arc surface. The rolling ball slides on the front wall of the pocket to produce arc surface scratches, and the ball and the spherical pocket are in arc surface contact. In the pocket 11 of the utility model, the ball intersects with the cylindrical arc surface 13 in the forward direction, i.e., the circumferential direction of the annular frame 1, to form a point or a short arc line, and the short arc line is oriented along the forward direction of the ball. The rolling ball slides on the front wall of the pocket to produce linear scratches, that is, the ball and the cylindrical arc surface pocket are in point contact or line contact. Therefore, the contact area between the pocket 11 in the utility model and the ball is smaller, and it can be understood that the contact between the ball and the two planes 12 is point contact or short arc contact (when the ball moves radially).

[0033] In some embodiments, the distance b between the two planes 12 in the axial direction of the annular frame 1 is defined as the inner diameter of the pocket 11, the diameter of the ball accommodated in the pocket 11 is q, (bq) is the pocket clearance, 0.1mm≤(bq)≤0.9mm, such a definition can prevent the pocket from being too small to fit the ball, and a large pocket clearance will affect the retaining effect of the retaining frame on the ball, and will also reduce the width of the short beam (that is, the separating beam 14), affecting the strength of the retaining frame; the diameter of the cylindrical arc surface 13 is D, 1≤D / b≤1.03, generally speaking, D / b=1, at this time, the pocket 11 has the same designed pocket clearance in the circumferential and axial directions, which is beneficial to the lubrication of the ball and the maintenance of the motion trajectory.

[0034] In some embodiments, when the inner ring diameter m of the angular contact ball bearing cage is greater than 150 mm, in order to alleviate the impact of the corresponding equipment on the bearing caused by the sudden stop or start, preferably, 1<D / b≤1.03. Specifically, for bearings with larger diameters, the linear velocity of the ball is larger, and the ball will have a greater impact on the cage during the sudden stop and start process. In view of this situation, a design of 1<D / b≤1.03 is adopted, which appropriately increases the circumferential pocket clearance, delays the collision time between the ball and the cage, and thus reduces the impact force.

[0035] There is a transition chamfer r between the adjacent planes 12 and the cylindrical arc surface 13, b / 10≤r≤b / 5, to prevent the transition chamfer from being too small and the transition from being smooth enough, which will cause the risk of stress concentration on the wall of the pocket 11. If the transition chamfer is too large, it will occupy the internal fat storage space, that is, the fat storage space of the pocket 11 should be as large as possible.

[0036] In some embodiments, each pocket 11 has an outer locking opening 21 located on the outer ring wall surface of the annular frame 1 and an inner locking opening 22 located on the inner ring wall surface of the annular frame 1, wherein the minimum distance between the outer locking opening 21 and the intersection line of the two cylindrical arc surfaces 13 is L1, 95%q≤L1≤97%q; the minimum distance between the inner locking opening 22 and the intersection line of the two cylindrical arc surfaces 13 is L2, 90%q≤L2≤93%q, that is, the passage diameter of the outer locking opening 21 is larger than the passage diameter of the inner locking opening 22.

[0037] In this technical solution, by optimizing and limiting the minimum distance between the outer locking port 21 and the inner locking port 22 and the diameter of the ball, and ensuring that the passage diameter of the outer locking port 21 is larger than the passage diameter of the inner locking port 22, the retaining frame is designed to load the ball from the outer diameter port, which can ensure that the ball can be easily loaded from the outer locking port 21 without letting the ball fall out of it; the design of the inner locking port 22 can provide a larger space for the flow of grease, and can also lock the ball to prevent it from falling out of the inner locking port 22.

[0038] In another specific embodiment, see Figure 6 As shown, the first end surface of the annular frame 1 (with Figure 6 The plane 12 adjacent to the second end face of the annular frame 1 (in the direction shown, that is, the right end face) is a first plane (not labeled in the figure), and is adjacent to the second end face of the annular frame 1 (in the direction shown, that is, the right end face) Figure 6 The plane 12 adjacent to the left end face (as shown in the direction, that is, the left end face) is a second plane (not marked in the figure), wherein the radially outer region of the first plane is connected to the first end face, and the radial thickness of the radially outer region is θ1, the radially inner region of the second plane is connected to the second end face, and the radial thickness of the radially inner region is θ2, and the radial thickness of the annular frame 1 is θ, θ1+θ2=θ.

[0039] In this technical solution, the radially outer area of ​​the first plane is connected with the first end face, and the radially inner area of ​​the second plane is connected with the second end face. This allows the annular frame 1 in the utility model to be able to process and manufacture the pockets 11 in the utility model by means of two mold cores that are opened and closed, thereby reducing the manufacturing difficulty and implementation cost. At the same time, it is worth emphasizing that in the utility model, the first plane and the second plane are respectively connected with the corresponding end faces, which can ensure the smooth flow of lubricating grease between the pockets 11, and ensure that the lubrication of the lubricating grease is more sufficient and the lubrication effect is better.

[0040] In some embodiments, the radial thickness of the radial outer area is θ1, which is greater than the radial thickness of the radial inner area is θ2. Specifically, the high-speed precision bearing guided by the outer ring is achieved by continuous contact, friction and collision between the guiding edge of the outer ring of the bearing and the outer side of the retaining frame. Therefore, the outer side of the retaining frame needs to bear the main load. In view of this situation, the technical solution in which the radial outer thickness is greater than the radial inner thickness is beneficial to improving the strength of the outer side of the retaining frame, thereby ensuring the overall structural strength of the retaining frame and extending its service life.

[0041] As mentioned above, there is a partition beam 14 between two adjacent pockets 11, and the end of the partition beam 14 corresponding to the first plane and / or the second plane has an inclined notch 141. The inclined notch 141 is set at the end of each partition beam 14 to further improve the fluidity of the lubricating grease between the pockets 11.

[0042] The annular frame 1 is injection molded using reinforced thermoplastic engineering plastics, such as fiber-reinforced polyphenylene sulfide composite materials, fiber-reinforced nylon 46 composite materials, fiber-reinforced nylon 66 composite materials, etc., and is preferably injection molded using high-performance carbon fiber reinforced thermoplastic polyetheretherketone composite materials. The carbon fiber reinforced thermoplastic polyetheretherketone composite materials have the characteristics of high strength, high temperature resistance, low friction, and wear resistance, and can give full play to the performance advantages.

[0043] In a specific embodiment, see Figure 7 As shown, the injection molding device of the angular contact ball bearing retainer is specifically an external core-pulling injection mold, which is prepared by an injection molding process using reinforced thermoplastic engineering plastics. Specifically, when the mold is processed, each pocket position corresponds to a pocket-shaped external core 400, and the external core 400 is connected to the slider mechanism through a connecting rod. The core-pulling function of the core mold is realized under the drive of the slider mechanism in conjunction with the mold opening and closing actions. After injection molding and core-pulling demoulding, the obtained retainer product has a complete annular frame and pocket structure. The mold can realize the preparation of the retainer of the utility model, but because the mold core corresponding to each pocket needs to be controlled to move in the radial direction, this leads to a complex design of the corresponding injection molding device actuator and a relatively high manufacturing cost. Therefore, as a preferred embodiment, see specifically Figure 8 As shown, an injection molding device for manufacturing the above-mentioned angular contact ball bearing retainer is also provided, comprising:

[0044] A punch 100, wherein the punch 100 has a cylindrical inner mold core 101, and a plurality of inner pocket hole forming mold pieces 102 are evenly spaced along the circumferential direction of the outer cylindrical wall surface of the cylindrical inner mold core 101;

[0045] A female mold 200, wherein the female mold 200 has a circular outer mold core 201, and the inner cylindrical wall surface of the circular outer mold core 201 has a plurality of outer pocket hole forming mold pieces 202 evenly spaced along the circumferential direction thereof;

[0046] The male mold 100 and the female mold 200 have a mold closing state and a mold opening state. The mold closing state is the state in which the male mold 100 and the female mold 200 are engaged with each other to form a corresponding injection cavity, while the mold opening state is the state in which the male mold 100 and the female mold 200 are separated from each other. When in the mold closing state, the annular outer mold core 201 is engaged with the radial outer side of the cylindrical inner mold core 101 to form an injection cavity between the two. Each of the inner pocket hole molding mold pieces 102 and each of the outer pocket hole molding mold pieces 202 They correspond one to one and form an inner and outer overlap, and the outer contours of the inner pocket hole forming mold piece 102 and the outer pocket hole forming mold piece 202 overlapped inside and outside are consistent with the hole type of the pocket hole 11, that is, the outer contours of the inner pocket hole forming mold piece 102 and the outer pocket hole forming mold piece 202 overlapped inside and outside are planes on the two side surfaces corresponding to the axial direction of the annular frame 1, while the two side surfaces corresponding to the circumference of the annular frame 1 are the aforementioned cylindrical arc surfaces, and the thickness is of course consistent with the depth of the corresponding pocket hole 11 (that is, the thickness of the annular frame 1).

[0047] In this technical solution, the placeholder entities of each pocket hole 11 are formed by inserting the inner and outer pocket hole forming mold pieces 102 and the outer pocket hole forming mold pieces 202, and each placeholder entity is in the injection cavity formed between the male mold 100 and the female mold 200 in the mold closing state. When the injection molding material is filled into the injection molding cavity, the annular frame 1 of the utility model is formed by injection molding, and then the male mold 100 and the female mold 200 are controlled to be away from each other. The device structure is simple, the design of the corresponding driving components is simpler, and the manufacturing cost of the device can be effectively reduced. It can be understood that the injection molding device also includes a corresponding fixed assembly bracket and related execution components (such as a cylinder, a hydraulic cylinder or a motor-driven lateral movement mechanism, etc.) that can control the switching of the male mold 100 and the female mold 200 between the mold closing and the mold opening state.

[0048] See also Figure 8 As shown, in some embodiments, the punch 100 is a movable mold plate, the die 200 is a fixed mold plate, and a runner 103 is formed on the end surface of the cylindrical inner mold core 101 facing the die 200. The runner 103 includes a central runner 1031, a branch runner 1032 that is constructed in the cylindrical inner mold core 101 and extends radially outward to the area between two adjacent inner pocket hole molding dies 102, and the die 200 has a gate sleeve 203 that passes through the central runner 1031.

[0049] In this technical solution, the runner 103 is constructed on the cylindrical inner mold core 101 of the punch 100, and the branch runners 1032 extending radially outward cooperate with the central runner 1031 to achieve uniform distribution of the injection melt poured at the gate sleeve 203 in the injection cavity, thereby ensuring the injection molding effect of the retainer.

[0050] According to an embodiment of the present invention, an angular contact ball bearing is further provided, comprising a retaining frame 300, wherein the retaining frame 300 is the above-mentioned angular contact ball bearing retaining frame.

[0051] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An angular contact ball bearing cage, characterized in that: The invention comprises an annular frame (1), wherein a plurality of pockets (11) are constructed on the annular frame (1), each pocket (11) penetrates the inner and outer annular wall surfaces of the annular frame (1) along the radial direction of the annular frame (1), each pocket (11) is evenly spaced along the circumference of the annular frame (1), and each pocket (11) is surrounded by two oppositely arranged planes (12) and two oppositely arranged cylindrical arc surfaces (13), wherein the two planes (12) are parallel to the radial plane of the annular frame (1), the two cylindrical arc surfaces (13) are on the same cylindrical surface, and the axis of the cylindrical surface is parallel to the central axis of the annular frame (1).

2. The angular contact ball bearing cage according to claim 1, characterized in that: The distance b between the two planes (12) in the axial direction of the annular frame (1) is defined as the inner diameter of the pocket (11), the diameter of the rolling ball accommodated in the pocket (11) is q, (bq) is the pocket gap, and 0.1mm≤(bq)≤0.9mm.

3. The angular contact ball bearing cage according to claim 1 or 2, characterized in that: The diameters of the two cylindrical arc surfaces (13) are D, 1≤D / b≤1.03; and / or, There is a transition chamfer r between the adjacent planes (12) and the cylindrical arc surfaces (13), and b / 10≤r≤b / 5.

4. The angular contact ball bearing cage according to claim 3, characterized in that: When the inner ring diameter m of the angular contact ball bearing retainer is greater than 150 mm, 1<D / b≤1.

03.

5. The angular contact ball bearing cage according to claim 4, characterized in that: Each pocket (11) has an outer locking opening (21) located on the outer ring wall surface of the annular frame (1) and an inner locking opening (22) located on the inner ring wall surface of the annular frame (1), wherein the minimum distance between the outer locking opening (21) and the intersection line of the two cylindrical arc surfaces (13) is L1, 95%q≤L1≤97%q; the minimum distance between the inner locking opening (22) and the intersection line of the two cylindrical arc surfaces (13) is L2, 90%q≤L2≤93%q.

6. The angular contact ball bearing cage according to claim 1, characterized in that: The plane (12) adjacent to the first end face of the annular frame (1) is a first plane, and the plane (12) adjacent to the second end face of the annular frame (1) is a second plane, wherein a radially outer region of the first plane is connected to the first end face, and a radial thickness of the radially outer region is θ1, a radially inner region of the second plane is connected to the second end face, and a radial thickness of the radially inner region is θ2, and a radial thickness of the annular frame (1) is θ, θ1+θ2=θ.

7. The angular contact ball bearing cage according to claim 6, characterized in that: The radial thickness θ1 of the radial outer region is greater than the radial thickness θ2 of the radial inner region; and / or, a partition beam (14) is provided between two adjacent pockets (11), and the end of the partition beam (14) corresponding to the first plane and / or the second plane has an inclined notch (141).

8. An injection molding device for manufacturing an angular contact ball bearing cage as claimed in claim 6 or 7, characterized in that: include: A male mold (100), wherein the male mold (100) has a cylindrical inner mold core (101), and an outer cylindrical wall surface of the cylindrical inner mold core (101) has a plurality of inner pocket hole forming mold pieces (102) evenly spaced along a circumferential direction thereof; A concave mold (200), wherein the concave mold (200) has an annular outer mold core (201), and the inner cylindrical wall surface of the annular outer mold core (201) has a plurality of outer pocket hole forming mold pieces (202) evenly spaced along the circumferential direction thereof; The male mold (100) and the female mold (200) have a mold closing state and a mold opening state. When in the mold closing state, the annular outer mold core (201) is buckled onto the radial outer side of the cylindrical inner mold core (101) to form an injection cavity between the two. Each of the inner pocket hole molding mold pieces (102) and each of the outer pocket hole molding mold pieces (202) correspond to each other one by one and are stacked inside and outside. The outer contours of the stacked inner pocket hole molding mold pieces (102) and the outer pocket hole molding mold pieces (202) are consistent with the hole shape of the pocket hole (11).

9. The injection molding device according to claim 8, characterized in that: The punch (100) is a movable mold plate, the die (200) is a fixed mold plate, a flow channel (103) is formed on the end surface of the cylindrical inner mold core (101) facing the die (200), the flow channel (103) includes a central flow channel (1031) and branch flow channels (1032) constructed in the cylindrical inner mold core (101) and extending radially outward to the area between two adjacent inner pocket hole molding mold pieces (102), and the die (200) has a gate sleeve (203) that penetrates the central flow channel (1031).

10. An angular contact ball bearing, comprising a retainer (300), characterized in that: The cage (300) is an angular contact ball bearing cage according to any one of claims 1 to 7.

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