Crown type bearing retainer and bearing

Abstract

The utility model discloses a crown-shaped bearing retainer and a bearing, and belongs to the technical field of bearing retainers. The retainer comprises a retainer body provided with a plurality of pocket holes, and each pocket hole is composed of two claw parts; the connecting parts are arranged between every two adjacent pocket holes, the top ends of the connecting parts are lower than the top ends of the claw parts, and the top ends of the connecting parts are planes; the reinforcing parts are connected with the connecting part, the number of the reinforcing parts is at least two, the reinforcing parts are evenly distributed in the annular direction of the frame body, and the end faces of the reinforcing parts are flush with the end face of the connecting part. The technical problem that an existing injection molding retainer is low in structural strength is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing retainer technical field, especially crown type bearing retainer and bearing. BACKGROUND

[0002] The retainer (also known as bearing retainer) is a bearing part that partially wraps all or part of the rolling element and moves with it, and is used to isolate the rolling element, guide the rolling element to roll and keep it in the bearing.

[0003] The retainer includes metal retainers and injection-molded retainers. Compared with the metal retainers, the injection-molded retainers have smaller mass, and have advantages such as magnetic resistance and low friction. At the same time, due to the limitation of the material, the structural strength of the injection-molded retainers is lower than that of the metal retainers. Therefore, the current injection-molded retainers have the technical problem of low structural strength. SUMMARY

[0004] The main purpose of the utility model is to provide a crown type bearing retainer and bearing, which aims to solve the technical problem of low structural strength of the current injection-molded retainers.

[0005] To achieve the above-mentioned purpose, the crown type bearing retainer provided by the utility model comprises:

[0006] The frame body is provided with a plurality of pockets, and each pocket is composed of two claw parts;

[0007] The connecting part is arranged between the adjacent two pockets, the top end of the connecting part is lower than the top end of the claw part, and the top end of the connecting part is a plane;

[0008] The reinforcing part is connected with the connecting part, the reinforcing part is provided with at least two, the plurality of reinforcing parts are uniformly distributed along the ring direction of the frame body, and the end face of the reinforcing part is flush with the end face of the connecting part.

[0009] Optionally, in an embodiment of the utility model, the number of reinforcing parts is equal to the number of connecting parts, and the reinforcing part is located at the center of the side of the connecting part away from the core part of the frame body.

[0010] Optionally, in an embodiment of the utility model, the reinforcing part is a semicylindrical structure.

[0011] Optionally, in an embodiment of the utility model, the connecting part is also provided with a weight-reducing groove, and the weight-reducing groove is located on the side of the connecting part close to the core part of the frame body.

[0012] Optionally, in one embodiment of the present invention, the connecting part has a connecting segment that extends obliquely from the inner wall of the connecting part to the inner wall of the weight-reducing groove.

[0013] Optionally, in one embodiment of the present invention, the bottom of the pocket has a spherical concave surface.

[0014] Optionally, in one embodiment of the present invention, the spherical concave surface extends in the peripheral direction of the frame to form an oil inlet groove.

[0015] Optionally, in one embodiment of the present invention, the diameter of the imaginary circle formed on the outer periphery of the claw is D1, and the diameter of the imaginary circle formed on the outer periphery of the frame is D2, where D2 > D1.

[0016] Optionally, in one embodiment of the present invention, the portion of the frame extending beyond the claw portion is a base platform, and the outer edge of the base platform at the connecting portion is a straight line.

[0017] To achieve the above objectives, this utility model also proposes a bearing, comprising:

[0018] Inner circle;

[0019] Outer ring;

[0020] Ball bearings, a plurality of said ball bearings being disposed between the inner ring and the outer ring;

[0021] And the crown-type bearing cage as described above.

[0022] Compared with existing technologies, this utility model achieves at least the following beneficial effects. The crown-type bearing cage proposed in this solution is an injection-molded cage. During the injection molding process, one step involves ejecting the injection-molded cage using an ejector pin. If the ejector pin directly contacts the cage, it may cause dents or scratches on the cage surface, resulting in defective products. Therefore, a reinforcing section is added to contact the ejector pin during material unloading, facilitating the ejector pin's ejection of the cage from the mold. When the ejector pin contacts the reinforcing section, it does not affect other parts of the cage; therefore, even if scratches or dents appear at the reinforcing section, it will not affect the cage's function. Furthermore, injection-molded cages inevitably have lower structural strength than metal cages. In addition to the above-mentioned function, the reinforcing section also enhances the overall structural strength of the cage during operation, preventing deformation or damage caused by the rolling elements. Attached Figure Description

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0024] Figure 1 It is a structure diagram of the crown type bearing retainer of the present application.

[0025] Figure 2 It is a top view of the crown type bearing retainer of the present application.

[0026] Figure 3 It is a sectional view formed along Figure 2 A-A direction.

[0027] Explanation of the reference signs:

[0028] 100, frame body; 110, pocket hole; 111, spherical concave surface; 112, oil inlet groove; 120, claw part; 130, bottom platform; 200, connecting part; 210, weight reduction groove; 220, connecting section; 300, reinforcing part;

[0029] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0032] In the utility model, unless another definite provision and limitation, the terms "connect", "fix" and the like should be understood broadly, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirect connection through intermediate medium, can be the intercommunication of two elements or the interaction of two elements, unless another definite limitation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0033] In addition, if the embodiment of the utility model involves "first", "second" and the like, the "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first", "second" can explicitly or implicitly include at least one feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. For example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0034] Referring to Figures 1-3 The utility model proposes a kind of crown type bearing retainer, comprising:

[0035] Frame body 100, frame body 100 is provided with multiple pockets 110, and each pocket 110 is formed by two claw parts 120;

[0036] Connecting portion 200, connecting portion 200 is arranged between adjacent two pockets 110, the top end of connecting portion 200 is lower than the top end of claw part 120, and the top end of connecting portion 200 is plane;

[0037] Reinforcing portion 300, reinforcing portion 300 is connected with connecting portion 200, reinforcing portion 300 is at least provided with two, and multiple reinforcing portions 300 are evenly distributed along the ring direction of frame body 100, and the end surface of reinforcing portion 300 is flush with the end surface of connecting portion 200.

[0038] The crown type bearing retainer provided in the scheme is an injection molded retainer. In the process of injection molding, there is a step of ejecting the injection molded retainer using a ejector pin. If the ejector pin directly abuts against the retainer, concave or scratches may occur, resulting in inferior products. Therefore, the reinforcing part 300 structure is added to contact the ejector pin during blanking, so that the ejector pin can eject the retainer from the mold. When the ejector pin abuts against the reinforcing part 300, it will not affect other parts of the retainer, so even if scratches or concave occur at the reinforcing part 300, it will not affect the function of the retainer. In addition, the injection molded retainer inevitably has lower structural strength than the metal material retainer. In addition to the above-mentioned effect, the reinforcing part 300 can also enhance the overall structural strength of the retainer during operation, preventing the retainer from deforming or being damaged due to the operation of the rolling element.

[0039] Specifically, the number of reinforcing parts 300 can be determined according to the number of ejector pins. In order to make the retainer bear uniform force during ejection, the reinforcing parts 300 also need to be arranged uniformly along the ring direction of the frame body 100. When two reinforcing parts 300 are arranged, the two reinforcing parts 300 are located at the two ends of the frame body 100 with the same diameter. When three reinforcing parts 300 are arranged, the connecting line between the three reinforcing parts 300 is at least an isosceles triangle, and an equilateral triangle is optimal. When four reinforcing parts 300 are arranged, the connecting line between the four reinforcing parts 300 is a rectangle, and a square is optimal.

[0040] In addition, the end face of the connecting part 200 is a plane, and the end face of the reinforcing part 300 is also a plane, and the two planes are flush. If the position of a certain ejector pin deviates during ejection, the end face of the connecting part 200 can abut against the ejector pin and be ejected, and since the connecting part 200 is flush with the reinforcing part 300, the situation of force deviation during ejection will not occur.

[0041] In a more preferred embodiment, the number of reinforcing parts 300 is the same as the number of connecting parts 200. In addition to abutting against the ejector pin during blanking, the reinforcing part 300 also has the function of improving the structural strength of the retainer. The rolling element of the crown type bearing is located in the pocket 110 and is clamped by the claw part 120. During operation, the rolling element will abut against the claw part 120 on one side, which will cause extrusion to the connecting part 200. In order to improve the structural strength of the connecting part 200, each connecting part 200 is connected with a reinforcing part 300.

[0042] Specifically, the reinforcing part 300 is arranged at the middle of the side of the connecting part 200 away from the core of the frame body 100, and has a semi-cylindrical structure. The plane of the semi-cylindrical structure is connected with the connecting part 200, and the curved surface is away from the core of the frame body 100. During the operation of the retainer, the outer periphery is filled with lubricating oil, and the curved surface outwardly can also reduce the resistance of the retainer to the lubricating oil during the flow.

[0043] Further, the connecting part 200 is also provided with a lightening groove 210. In the operation process of the retainer, by providing the lightening groove 210, the mass of the retainer can be reduced, thereby improving the operation efficiency of the bearing and reducing the wear and heating caused by the inertial force.

[0044] In the operation process of the retainer, friction inevitably occurs between the inside of the retainer and other components, and the friction at high speed rotation generates a large amount of heat. If the heat cannot be dissipated in time, the temperature of the bearing will rise, the performance will decrease, and even damage will occur. The retainer formed by injection molding has poor heat resistance, and is more prone to deformation at high temperature. After the lightening groove 210 is provided, the heat dissipation area of the retainer can be increased, thereby improving the heat dissipation performance.

[0045] In addition to heat dissipation, the structure of the lightening groove 210 can also serve as a storage space for lubricating oil, ensuring sufficient supply of lubricating oil during the operation of the bearing. In order to facilitate the flow of lubricating oil in the lightening groove 210, the connecting part 200 is also provided with a connecting section 220, which is an inclined planar structure extending from the inner wall of the connecting part 200 to the inner wall of the lightening groove 210, providing a smooth flow path for the lubricating oil flowing therebetween.

[0046] In addition, in order to facilitate the flow of lubricating oil, the corners of the lightening groove 210 are rounded to form smooth curved surfaces to reduce resistance.

[0047] Further, the bottom of the pocket hole 110 is provided with a spherical concave surface 111. Since the rolling element is a ball, in order to improve the fixation of the pocket hole 110 to the rolling element, the spherical concave surface 111 is provided to carry the ball. The spherical concave surface 111 can increase the contact area between the ball and the pocket hole 110 and uniformly distribute the contact stress therebetween. The spherical concave surface 111 can also make the ball more stable during rotation, prevent the ball from moving off course, and reduce wear and noise caused by the ball shaking or jumping.

[0048] After the contact area between the pocket hole 110 and the ball is increased, a large area of oil film can also be generated between the pocket hole 110 and the ball, improving the lubricity. Similarly, a large area of oil film requires more lubricating oil. In order to ensure that sufficient lubricating oil can enter the pocket hole 110, the spherical concave surface 111 extends outwardly to the periphery of the frame body 100 to form an oil inlet groove 112. Through the oil inlet groove 112, lubricating oil can directly enter the gap between the ball and the bottom wall of the pocket hole 110.

[0049] The diameter of the imaginary circle formed by the outer periphery of the claw portion 120 is defined as D1, and the diameter of the imaginary circle formed by the outer periphery of the cage body 100 is defined as D2, D2>D1, that is, the outer periphery of the claw portion 120 has the structure of the cage body 100, and this part of the structure is the base 130. By providing the base 130, the structural strength of the whole retainer is improved. Specifically, the outer edge of the base 130 at the connecting portion 200 is a straight line structure, that is, the outer periphery of the cage body 100 is a ring structure formed by alternately arranging straight lines and curves.

[0050] The utility model discloses still propose a kind of bearing, the bearing includes the retainer, inner ring, outer ring and ball as described above, specifically, the specific structure of retainer refers to above embodiment, since the bearing has adopted all technical solutions of above embodiment, therefore at least have all beneficial effects brought by the technical solutions of above embodiment, here no longer repeat.

[0051] The above is only optional embodiment of the utility model, and does not limit the patent range of the utility model, and all equivalent structural transformations made by using the utility model specification and drawing contents, or direct / indirect application in other related technical fields under the inventive concept of the utility model are included in the patent protection range of the utility model.

Claims

1. A crown-type bearing cage, characterized by The application relates to a crown type bearing retainer, which comprises the following parts: a frame body provided with a plurality of pockets, each of which is composed of two claw parts; a connecting part arranged between two adjacent pockets, the top end of the connecting part being lower than the top end of the claw part, and the top end of the connecting part being a plane; a reinforcing part connected with the connecting part, the reinforcing part being provided with at least two, the reinforcing parts being uniformly distributed along the ring direction of the frame body, the end surface of the reinforcing part being flush with the end surface of the connecting part, the number of the reinforcing parts being equal to the number of the connecting parts, the reinforcing part being located at the center of the side, away from the core of the frame body, of the connecting part, and the reinforcing part being a semicylindrical structure.

2. The crowned bearing cage of claim 1, wherein, The connecting part is further provided with a weight-reducing groove located on the side of the connecting part close to the core of the frame body.

3. The crowned bearing cage of claim 2, wherein, The connecting part has a connecting section which is formed by the inner wall of the connecting part being obliquely extended to the inner wall of the weight-reducing groove.

4. The crowned bearing cage of claim 1, wherein, The bottom of the pocket has a spherical concave surface.

5. The crowned bearing cage of claim 4, wherein, The spherical concave surface extends to the outer periphery of the frame body to form an oil inlet groove.

6. The crowned bearing cage of claim 1, wherein, The diameter of an imaginary circle formed by the outer periphery of the claw part is D1, and the diameter of an imaginary circle formed by the outer periphery of the frame body is D2, and D2>D1.

7. The crowned bearing cage of claim 6, wherein, The part of the frame body beyond the claw part is a bottom platform, and the outer edge of the bottom platform at the connecting part is a straight line.

8. A bearing, characterized by The application relates to a crown type bearing retainer, which comprises the following parts: an inner ring; an outer ring; a plurality of balls arranged between the inner ring and the outer ring; and the crown type bearing retainer according to any one of claims 1-7.

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