A high speed open cage

Abstract

The application relates to the field of bearing components, in particular to a high-speed open type retainer which comprises a base ring, a claw group and a reinforcing rib, the claw group is connected to one end of the base ring and is provided with pockets, a plurality of the claw groups are arranged at intervals along the circumference of the base ring, the reinforcing rib is connected to one end of the base ring and the adjacent claw group, the minimum distance of the reinforcing rib to the axis of the base ring is greater than the inner diameter of the base ring, and the maximum distance of the reinforcing rib to the axis of the base ring is less than the outer diameter of the base ring, the application further comprises a reinforcing ring connected to one end of the base ring away from the claw group, and the reinforcing rib has a plurality of specific structural settings. The application achieves the technical effects of enhancing the overall structural strength of the high-speed open type retainer, improving the stability and reliability of the high-speed open type retainer, and meeting the requirements of high-speed operation.

Description

Technical Field

[0001] This application relates to the field of bearing components, and in particular to a high-speed open cage. Background Technology

[0002] In the field of rolling bearing technology, the development of new energy drive motors places higher demands on the performance of open cages for high-speed deep groove ball bearings. With the rise of industries such as new energy vehicles, the demand for cages that can adapt to high-speed operation, ensure stable bearing performance, and achieve lightweight design is increasing daily. As a key component of the bearing, the performance of the cage directly affects the overall performance of the bearing, and consequently, the operating efficiency and reliability of equipment such as new energy drive motors. A well-designed cage can improve the stability of the bearing's assembly form, providing a fundamental guarantee for the efficient operation of the equipment.

[0003] Current single-sided open crown-shaped cages are typically made of plastic to meet certain strength and lightweight requirements. However, single-sided open crown-shaped plastic cages have inherent design flaws: their center of mass does not coincide with their center of rotation, and under the enormous centrifugal force generated by high-speed operation, this can lead to significant vortexing of the cage, resulting in decreased operational stability; the gyroscopic torque and complex nonlinear motion such as spin sliding generated by the contact between the rolling elements and the raceway can exacerbate abnormal impacts and friction on the sidewalls and bottom of the cage pockets; the root of the pocket, as a stress concentration area, not only bears high-frequency, alternating impact loads but also generates heat due to internal friction (especially prominent under lean lubrication conditions), leading to excessively high local temperature rise of the material.

[0004] Stress concentration occurs at the root of the pocket. Under the combined effects of high-frequency alternating impact loads and frictional heat, the material's hardness and strength decrease sharply, which can easily lead to micro-fatigue cracks that propagate rapidly, eventually causing tearing at the root of the pocket or overall fracture, resulting in bearing failure. Utility Model Content

[0005] To improve the strength of the cage pocket root, this application provides a high-speed open cage.

[0006] The high-speed open cage provided in this application adopts the following technical solution: A high-speed open cage includes a base ring, claw assembly, and reinforcing ribs. The claw assembly is connected to one end of the base ring, and the claw assembly is provided with pockets. Multiple claws are spaced apart along the circumference of the base ring. The reinforcing rib is connected to one end of the base ring and to an adjacent claw assembly. The minimum distance from the reinforcing rib to the axis of the base ring is greater than the inner diameter of the base ring, and the maximum distance from the reinforcing rib to the axis of the base ring is less than the outer diameter of the base ring.

[0007] By adopting the above technical solution, there is a gap between the claws, which is conducive to weight reduction, reduces the rotational inertia of the cage, improves the acceleration response capability of the bearing system, and reduces high-speed start-up energy consumption. The use of reinforcing ribs connected to the base ring and adjacent claw groups helps to improve the strength of the root of the pocket, enhance the resistance to bending, torsion and impact, inhibit the initiation and propagation of microcracks, and improve service life. The surfaces of the claw assembly and the reinforcing ribs form open side grooves, creating lubricant channels. Lubricant can be stored in the side grooves to continuously lubricate and cool the cage, avoiding dry friction and instantaneous high temperatures caused by localized insufficient oil.

[0008] Preferably, the distance from the end of the reinforcing rib facing away from the base ring to the base ring is less than the distance from the end of the claw assembly facing away from the base ring to the base ring.

[0009] By adopting the above technical solution, the surface of the claw assembly and the end face of the reinforcing rib facing away from the base ring also form an open upper groove, and the upper groove is connected to the side groove to form a lubricant channel. The upper groove can store lubricant to continuously provide lubrication and cooling for the cage, avoiding dry friction and instantaneous high temperature caused by local oil deficiency.

[0010] Preferably, along the circumferential direction of the base ring: the thickness of the middle part of the reinforcing rib is greater than the thickness of the two ends of the reinforcing rib.

[0011] By adopting the above technical solutions, the weight of the cage can be reduced while meeting the strength requirements, thus achieving lightweighting.

[0012] Preferably, the reinforcing ribs include rib sheets and rib strips. The reinforcing rib is connected to the base ring, and the reinforcing rib is connected to the claw assembly. The rib is connected to the middle of the rib plate, and there is a gap between the rib and the claw assembly.

[0013] By adopting the above technical solution, the side groove is directly connected to the upper groove, which is beneficial for storing lubricant.

[0014] Preferably, the cross-section of the rib is arc-shaped.

[0015] By adopting the above technical solutions, stress concentration can be reduced.

[0016] Preferably, there are two ribs, which are respectively connected to both sides of the rib sheet.

[0017] By adopting the above technical solutions, the overall integrity and strength of the structure can be improved.

[0018] Preferably, the cross-section of the rib is arc-shaped, and the centers of the two ribs coincide.

[0019] By adopting the above technical solutions, the overall integrity and strength of the structure can be improved.

[0020] Preferably, the reinforcing rib is parallel to the axial direction of the base ring.

[0021] By adopting the above technical solution, it is beneficial to store lubricant.

[0022] Preferably, it also includes a reinforcing ring. The reinforcing ring is connected to one end of the base ring away from the claw assembly.

[0023] By adopting the above technical solution, the bottom of the pocket is thickened to improve its strength.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The unique groove and reinforcing rib structure forms an efficient lubricant channel, realizing the synergistic design of "weight reduction and self-alignment at the top" and "thickening and strengthening at the root", which improves dynamic stability and structural reliability while reducing weight; 2. Enhances the bending, torsion and impact resistance of the bottom of the pocket, inhibits the initiation and propagation of microcracks, and extends the service life of the cage. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the high-speed open cage.

[0026] Figure 2 This is a partial schematic diagram of a high-speed open cage.

[0027] Figure 3 This is a dynamic stress diagram of a high-speed open cage.

[0028] Figure 4 This is a static stress diagram of a high-speed open cage.

[0029] Explanation of reference numerals in the attached diagram: 1. Base ring; 2. Claw assembly; 21. Pocket claw; 22. Pocket hole; 3. Reinforcing rib; 31. Rib plate; 32. Rib strip; 41. Side groove; 42. Upper groove; 5. Reinforcing ring. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] Reference Figure 1 and Figure 2 This application discloses a high-speed open cage, including a base ring 1, a claw assembly 2, and a reinforcing rib 3.

[0032] Multiple claw assemblies 2 are provided, and each claw assembly 2 is fixedly connected to one end surface of the base ring 1 along its own axial direction. Each claw assembly 2 includes two pocket claws 21, and a pocket hole 22 is formed between the two pocket claws 21 for the insertion of rolling elements. Multiple claw assemblies 2 are arranged at equal intervals along the circumference of the base ring 1, so that multiple rolling elements are evenly distributed.

[0033] There are multiple reinforcing ribs 3, and the number of reinforcing ribs 3 is equal to the number of claw assemblies 2. One reinforcing rib 3 is arranged between two adjacent claw assemblies 2. The reinforcing rib 3 is fixedly connected to one end surface of the base ring 1 and to the adjacent claw assembly 2.

[0034] The minimum distance from the reinforcing rib 3 to the axis of the base ring 1 is greater than the inner diameter of the base ring 1, and the maximum distance from the reinforcing rib 3 to the axis of the base ring 1 is less than the outer diameter of the base ring 1, so that the surface of the reinforcing rib 3 facing / away from the center of the base ring 1 and the surface of the claw assembly 2 form a side groove 41. Simultaneously, the distance from the end of the reinforcing rib 3 away from the base ring 1 to the base ring 1 is less than the distance from the end of the claw assembly 2 away from the base ring 1 to the base ring 1, so that the surface of the reinforcing rib 3 away from the base ring 1 and the surface of the claw assembly 2 form an upper groove 42. The upper groove 42 is directly connected to the side groove 41, and both the upper groove 42 and the side groove 41 can be used to store lubricant.

[0035] Along the circumference of the base ring 1: the thickness of the middle part of the reinforcing rib 3 is greater than the thickness of both ends of the reinforcing rib 3. Specifically: the reinforcing rib 3 includes a rib sheet 31 and a rib strip 32; the rib sheet 31 is parallel to the axial direction of the base ring 1 and is fixedly connected to the base ring 1 and the claw assembly 2; the rib strip 32 is connected to the middle part of the rib sheet 31, and there is a gap between the rib strip 32 and the claw assembly 2.

[0036] In the attached diagram: the reinforcing rib 31 is arc-shaped; there are two reinforcing ribs 32, which are respectively connected to the two sides of the reinforcing rib 31; the cross-section of the reinforcing rib 32 is arc-shaped, and the centers of the two reinforcing ribs 32 coincide; the reinforcing rib 32 is parallel to the axial direction of the base ring 1.

[0037] The high-speed open cage also includes a reinforcing ring 5. The reinforcing ring 5 is fixedly connected to one end of the base ring 1 away from the claw assembly 2.

[0038] In one embodiment: the base ring 1, claw assembly 2, reinforcing rib 3 and reinforcing ring 5 are integrally formed; the cage can be made of plastic material, specifically PA46 matrix with 30% glass fiber (GF) added.

[0039] Reference Figure 3 and Figure 4The cage of the 6012 bearing has a dynamic equivalent stress of 72.38 MPa and a static equivalent stress of 50.2 MPa at 21,000 rpm. Using the yield strength of PA46-GF30 material (180 MPa as specified in JB / T7048-2011) and a safety factor of 2 as the standard, its allowable stress is 90 MPa. Both the dynamic and static equivalent stresses are less than the allowable stress.

[0040] The implementation principle of a high-speed open cage according to an embodiment of this application is as follows: Through the rational design and combination of the base ring 1, claw assembly 2, reinforcing rib 3, and reinforcing ring 5, the stability and reliability of the cage are improved. PA46-GF30 plastic material is used to reduce deformation caused by centrifugal force, achieving lightweight design. The design of the reinforcing rib 3 and reinforcing ring 5 enhances structural strength, disperses stress, and avoids stress concentration. The pockets 22 on the claw assembly 2 provide stable installation and operating space for the rolling elements, reducing abnormal impacts and friction between the rolling elements and the cage. The cage of this embodiment is suitable for high-speed bearings with dmN values ​​exceeding 1.6 million, and helps control the curb weight and improve energy efficiency in new energy vehicles, etc.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-speed open-type cage, characterized in that, It includes a base ring (1), a claw assembly (2), and a reinforcing rib (3). The claw assembly (2) is connected to one end of the base ring (1). The claw assembly (2) is provided with pockets (22). The claw assembly (2) is provided with multiple claws spaced apart along the circumference of the base ring (1). The reinforcing rib (3) is connected to one end of the base ring (1), and the reinforcing rib (3) is connected to the adjacent claw group (2). The minimum distance from the reinforcing rib (3) to the axis of the base ring (1) is greater than the inner diameter of the base ring (1), and the maximum distance from the reinforcing rib (3) to the axis of the base ring (1) is less than the outer diameter of the base ring (1).

2. A high-speed open cage according to claim 1, characterized in that, The distance from the end of the reinforcing rib (3) facing away from the base ring (1) to the base ring (1) is less than the distance from the end of the claw group (2) facing away from the base ring (1) to the base ring (1).

3. A high-speed open cage according to claim 1, characterized in that, Along the circumference of the base ring (1): the thickness of the middle part of the reinforcing rib (3) is greater than the thickness of the two ends of the reinforcing rib (3).

4. A high-speed open cage according to claim 1 or 3, characterized in that, The reinforcing rib (3) includes rib sheets (31) and rib strips (32). The reinforcing rib (31) is connected to the base ring (1), and the reinforcing rib (31) is connected to the claw assembly (2). The rib (32) is connected to the middle of the rib (31), and there is a gap between the rib (32) and the claw group (2).

5. A high-speed open cage according to claim 4, characterized in that, The cross section of the rib (32) is arc-shaped.

6. A high-speed open cage according to claim 4, characterized in that, There are two ribs (32), and the two ribs (32) are respectively connected to both sides of the rib sheet (31).

7. A high-speed open cage according to claim 6, characterized in that, The cross section of the rib (32) is arc-shaped, and the centers of the two ribs (32) coincide.

8. A high-speed open cage according to claim 4, characterized in that, The reinforcing bar (32) is parallel to the axial direction of the base ring (1).

9. A high-speed open cage according to claim 1, characterized in that, It also includes a reinforcing ring (5). The reinforcing ring (5) is connected to one end of the base ring (1) away from the claw assembly (2).

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