A profiled pocket retainer and split type self-aligning roller bearing

Abstract

The utility model belongs to the technical field of profiled pocket retainer, specifically discloses a profiled pocket retainer and split type self-aligning roller bearing thereof, which is composed of an outer ring, an inner ring, a spherical roller assembly, a fastening ring and fastening screws, the spherical roller assembly is installed between the outer ring and the inner ring, the spherical roller assembly comprises a spherical roller, an inner support ring, an outer support ring, a single-surface profiled spacer block and a double-surface profiled spacer block, the single-surface profiled spacer block is installed at both ends of the inner support ring and the outer support ring through countersunk screws, the double-surface profiled spacer block is arranged between the single-surface profiled spacer blocks at intervals, one spherical roller is arranged between every two spacer blocks of the bearing, thereby effectively controlling the skew and deflection of the rolling body during operation, reducing the heat generation and vibration of the bearing during use, effectively prolonging the service life of the bearing and reducing the production cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of contoured pocket retainers, specifically relating to a contoured pocket retainer and its split self-aligning roller bearing. Background Technology

[0002] Self-aligning roller bearings feature double-row rollers, with a common spherical raceway on the outer ring and two raceways on the inner ring inclined at an angle relative to the bearing axis. This ingenious structure gives it self-aligning properties, making it less susceptible to angular misalignment between the shaft and bearing housing or shaft bending. It is suitable for applications where angular errors are caused by installation errors or shaft deflection. In addition to radial loads, this bearing can also withstand bidirectional axial loads. Existing split self-aligning roller bearing cages have certain shortcomings in use. For example, a split self-aligning roller bearing cage and its self-aligning roller bearing, as disclosed in CN201810645724.X, replaces the original connecting plate structure with screws and Z-shaped splicing surfaces. This new connection method effectively reduces radial clearance caused by cage connection and improves cage deformation. Furthermore, the space for the connecting screws fixing the cage is relatively spacious, allowing the use of high-strength connecting screws. The cage is further reinforced by semi-clamping rings, improving its stability. Staggered pockets on the cage are used to store... The rolling elements allow for balanced force distribution during operation and effectively increase the strength of the cage. This enables the rolling elements to rotate relatively regularly and smoothly within the cage pockets, reducing wear between the rolling elements and the cage. It offers advantages such as structural stability and high practicality. For example, a split self-aligning roller bearing with publication number CN209959718U has a cage structure similar to that of patent CN201810645724.X, featuring an externally guided double-claw cage, but without a detailed description of the cage pocket shape. Similarly, a split self-aligning roller bearing cage with publication number CN216951309U is similar to the above two cage structures, but with improvements in the connection method of the half-cage. It also features a double-claw cage and without a detailed description of the cage pocket shape. The above-mentioned existing technologies still have the following problems in use.

[0003] 1. In the above-mentioned existing technical solutions, the cage is a double-claw solid cage and the cage cover are connected by screws. When the bearing is subjected to a large axial force, the bearing is prone to a situation where a single row of rollers bears the load or one row of rollers bears a large load and the other row of rollers bears a small load. At this time, it is easy to cause the two rows of rollers to have different speeds. The faster roller drives the cage, and at the same time, the cage drives the other side of the roller to accelerate, eventually making the two rows of rollers keep the speeds the same. When the faster roller drags the slower roller, the cage bears a large drag force, which can easily cause the cage to break.

[0004] None of the aforementioned existing technical solutions mention the shape of the cage pockets. However, according to the cage structure shown in the patent, the shape of its pockets is consistent with that of a CA-type self-aligning roller. That is, half of the roller rolling surface contacts the spherical arc pocket, while the other half has a certain gap with the cylindrical pocket surface of the cage. Theoretically, the cylindrical pocket surface does not contact the bearing roller. When the roller is skewed or misaligned during operation, this type of pocket cannot effectively play the role of straightening the roller. In view of the above problems, there is an urgent need for a method that can solve this problem. Utility Model Content

[0005] In view of the problems existing in the background art, this utility model provides a contoured pocket retainer and its split self-aligning roller bearing.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a contoured pocket retainer and its split self-aligning roller bearing, comprising an outer ring, an inner ring, spherical roller assemblies, a fastening ring, and fastening screws. The spherical roller assemblies are arranged in groups of two to form a ring, and the two groups of spherical roller assemblies are symmetrically installed between the outer ring and the inner ring, and fixed by the fastening ring. Each spherical roller assembly includes spherical rollers, an inner support ring, an outer support ring, a single-sided contoured isolation block, and a double-sided contoured isolation block. The outer support ring is semi-circular, with multiple countersunk holes A evenly distributed on its end face; the inner support ring is also semi-circular, with multiple countersunk holes B evenly distributed on its end face; the countersunk holes A and B have the same structure and correspond to each other; the single-sided contoured isolation block is installed at both ends of the inner and outer support rings by countersunk screws; the double-sided contoured isolation block and the spherical roller are spaced apart between the single-sided contoured isolation block, and the double-sided contoured isolation block is installed between the inner and outer support rings by countersunk screws.

[0007] The fastening ring is mounted on the outside of the spherical roller assembly by fastening screws.

[0008] The single-sided contoured isolation block has a rectangular parallelepiped structure. One side of the single-sided contoured isolation block is a spherical groove, and the radius of curvature of the spherical groove is the same as that of the spherical roller. The front end face of the single-sided contoured isolation block is provided with a threaded hole A, and the rear end face of the single-sided contoured isolation block is provided with a threaded hole B. The threaded hole A and the threaded hole B have the same structure and are adapted to the countersunk hole A and the countersunk hole B.

[0009] The double-sided contoured isolation block has a rectangular parallelepiped structure. The left and right sides of the double-sided contoured isolation block are spherical grooves with the same radius of curvature as the spherical roller. The front end face of the double-sided contoured isolation block is provided with a threaded hole C, and the rear end face of the double-sided contoured isolation block is provided with a threaded hole D. The threaded hole C and the threaded hole D have the same structure and are adapted to the countersunk holes A and B.

[0010] The countersunk screw has anti-loosening adhesive applied to its threads.

[0011] The single-sided contoured isolation block and the double-sided contoured isolation block have the same length.

[0012] The length of the double-sided contoured isolation block is not less than the length of the spherical roller.

[0013] The beneficial effects of this utility model are as follows: This utility model provides a conformal pocket cage and its split self-aligning roller bearing. A spherical roller is provided between every two spacers in the bearing. The curvature of the spherical roller's rolling surface is completely consistent with the curvature of the spherical groove in the conformal pocket, ensuring a uniform gap between the cage pocket and the roller. This effectively controls the skewing and misalignment of the rolling elements during operation, thereby reducing heat generation and vibration during bearing use, effectively increasing bearing life, and reducing production costs. Attached Figure Description

[0014] Figure 1 This is a side sectional view of the bearing.

[0015] Figure 2 for Figure 1 A schematic diagram of the K-direction.

[0016] Figure 3 This is a magnified view of a portion of point A.

[0017] Figure 4 This is a schematic diagram of a double-sided contoured pocket isolation block.

[0018] Figure 5 This is a schematic diagram of a single-sided contoured pocket isolation block.

[0019] Figure 6 This is a schematic diagram of the outer support ring.

[0020] Figure 7 This is a schematic diagram of the inner support ring.

[0021] In the diagram: 1. Inner ring of bearing; 2. Fastening ring; 3. Fastening screw; 4. Countersunk screw; 5. Outer support ring; 6. Double-sided contoured pocket isolation block; 7. Spherical roller; 8. Inner support ring; 9. Oil hole; 10. Outer ring of bearing; 11. Spherical roller assembly; 12. Single-sided contoured pocket isolation block. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The following detailed description of the specific embodiments of this utility model, in conjunction with the accompanying drawings, further illustrates the following: A contoured pocket retainer and its split self-aligning roller bearing include an outer ring 10, an inner ring 1, spherical roller assemblies 11, a fastening ring 2, and fastening screws 3. The spherical roller assemblies 11 are arranged in pairs to form a ring. The two sets of spherical roller assemblies 11 are symmetrically installed between the outer ring 10 and the inner ring 1, and fixed by the fastening rings 2. A certain space is maintained between the two sets of spherical roller assemblies 11, and they are connected to an oil hole 9 for easy daily maintenance of the bearing. The fastening rings 2 are installed on the outside of the spherical roller assemblies by the fastening screws 3. The spherical roller assembly 11 includes spherical rollers 7, an inner support ring 8, an outer support ring 5, and a single-sided contoured... The system includes an isolation block 12 and a double-sided contoured isolation block 6. The outer support ring 5 is semi-circular, with multiple countersunk holes A evenly distributed on its end face. The inner support ring 8 is also semi-circular, with multiple countersunk holes B evenly distributed on its end face. The countersunk holes A and B have the same structure and correspond to each other. In this embodiment, two countersunk holes A or B form a group, allowing for more stable fixation of the single-sided contoured isolation block 12 or the double-sided contoured isolation block 6, preventing rotation due to vibration during bearing operation and thus preventing bearing damage. The single-sided contoured isolation block 12 has a rectangular parallelepiped structure, with one side being a spherical groove. The radius of curvature of the spherical groove is similar to that of the spherical roller. The radii of curvature of the single-sided contoured isolation block 12 are the same as those of the spherical roller 7. The single-sided contoured isolation block 12 has a threaded hole A on its front end face and a threaded hole B on its rear end face. Threaded hole A and threaded hole B have the same structure and are compatible with countersunk holes A and B. The double-sided contoured isolation block 6 is a rectangular parallelepiped structure. The left and right sides of the double-sided contoured isolation block 6 are spherical grooves, and the radius of curvature of the spherical grooves is the same as that of the spherical roller 7. The double-sided contoured isolation block 6 has a threaded hole C on its front end face and a threaded hole D on its rear end face. Threaded hole C and threaded hole D have the same structure and are compatible with countersunk holes A and B. The single-sided contoured isolation block 12 and the double-sided contoured isolation block 6 have the same length. The length of the spherical roller 7 shall not be less than the length of the spherical roller 7. During actual installation, a certain gap exists between the spherical roller 7 and the inner support ring 8, outer support ring 5, single-sided contoured isolation block 12, and double-sided contoured isolation block 6 to allow grease or oil to enter for lubrication. The single-sided contoured isolation block 12 is installed at both ends of the inner support ring 8 and outer support ring 5 using countersunk screws 4. The double-sided contoured isolation block 6 is spaced apart from the spherical roller 7 between the single-sided contoured isolation block 12 and is installed between the inner support ring 8 and outer support ring 5 using countersunk screws 4. The threads of the countersunk screws 4 are coated with anti-loosening adhesive, which effectively prevents loosening and thus prevents the countersunk screws 4 from falling off the inner support ring 8 or outer support ring 5.In this embodiment, the countersunk screw 4 can also be replaced with other connection methods, such as riveting.

[0024] The usage process of this utility model is as follows: First, one end of the single-sided contoured isolation block 12 is installed on one end of the inner support ring 8 using a countersunk screw 4. Then, the spherical roller 7 is placed in the spherical groove of the inner support ring 8. Next, the double-sided contoured isolation block 6 is installed on the countersunk hole adjacent to the single-sided contoured isolation block 12. At this time, the spherical roller 7 is located in the spherical groove between the single-sided contoured isolation block 12 and the double-sided contoured isolation block 6. The double-sided contoured isolation block 6 and the spherical roller 7 are installed in sequence. When the installation reaches the other end of the inner support ring 8, another single-sided contoured isolation block 12 is installed on the other end of the inner support ring 8. Then, the outer support ring 5 is installed on the other end of the single-sided contoured isolation block 12 and the double-sided contoured isolation block 6 using a countersunk screw 4, assembling a spherical roller assembly 11. The two spherical roller assemblies 11 are combined into a ring. Finally, the two rings are symmetrically installed between the outer ring 10 and the inner ring 1, and fixed by the fastening ring 2 to complete the assembly of the bearing.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0026] The parts of this utility model not described in detail are existing technologies.

Claims

1. A conformal pocket cage and its split self-aligning roller bearing, comprising an outer ring (10), an inner ring (1), a spherical roller assembly (11), a retaining ring (2), and a fastening screw (3), characterized in that: The spherical roller assembly (11) consists of two rollers arranged in a ring. The two sets of spherical roller assemblies (11) are symmetrically installed between the outer ring (10) and the inner ring (1) and fixed by a fastening ring (2). The spherical roller assembly (11) includes a spherical roller (7), an inner support ring (8), an outer support ring (5), a single-sided contoured isolation block (12), and a double-sided contoured isolation block (6). The outer support ring (5) is semi-circular, and multiple countersunk holes A are evenly distributed on the end face of the outer support ring (5). The inner support ring (8) is semi-circular. The ring (8) is semi-circular, and multiple countersunk holes B are evenly distributed on the end face of the inner support ring (8); the countersunk holes A and B have the same structure and correspond to each other; the single-sided contoured isolation block (12) is installed at both ends of the inner support ring (8) and the outer support ring (5) by countersunk screws (4); the double-sided contoured isolation block (6) and the spherical roller (7) are spaced apart between the single-sided contoured isolation block (12); the double-sided contoured isolation block (6) is installed between the inner support ring (8) and the outer support ring (5) by countersunk screws (4).

2. The conformal pocket cage and its split self-aligning roller bearing according to claim 1, characterized in that: The fastening ring (2) is mounted on the outside of the spherical roller assembly by fastening screws (3).

3. The conformal pocket cage and its split self-aligning roller bearing according to claim 1, characterized in that: The single-sided contoured isolation block (12) is a cuboid structure. One side of the single-sided contoured isolation block (12) is a spherical groove, and the radius of curvature of the spherical groove is the same as that of the spherical roller (7). The front end face of the single-sided contoured isolation block (12) is provided with a threaded hole A, and the rear end face of the single-sided contoured isolation block (12) is provided with a threaded hole B. The structure of the threaded hole A and the threaded hole B is the same, and they are compatible with the countersunk hole A and the countersunk hole B.

4. The conformal pocket cage and its split self-aligning roller bearing according to claim 1, characterized in that: The double-sided contoured isolation block (6) is a rectangular parallelepiped structure. The left and right sides of the double-sided contoured isolation block (6) are spherical grooves. The radius of curvature of the spherical grooves is the same as that of the spherical roller (7). The front end face of the double-sided contoured isolation block (6) is provided with a threaded hole C, and the rear end face of the double-sided contoured isolation block (6) is provided with a threaded hole D. The structure of the threaded hole C and the threaded hole D is the same, and they are compatible with the countersunk hole A and the countersunk hole B.

5. The conformal pocket cage and its split self-aligning roller bearing according to claim 1, characterized in that: The countersunk screw (4) has anti-loosening adhesive applied to its threads.

6. The conformal pocket cage and its split self-aligning roller bearing according to claim 1, characterized in that: The single-sided contoured isolation block (12) has the same length as the double-sided contoured isolation block (6).

7. The conformal pocket cage and its split self-aligning roller bearing according to claim 6, characterized in that: The length of the double-sided contoured isolation block (6) is not less than the length of the spherical roller (7).

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