A full complement long spherical roller bearing

Abstract

The utility model provides a kind of full-length spherical surface roller bearing, including outer ring, roller, retainer and inner ring;Retainer includes crossbeam and double ring beam, and double ring beam is supported between by crossbeam, and crossbeam has multiple, multiple crossbeams are evenly distributed and set on the inner end surface of double ring beam and close to the side of inner diameter, and form pocket between adjacent two crossbeams and double ring beam;Roller is arranged between outer ring and inner ring and rolls, and one roller is arranged in one pocket;Retainer is once stamping forming retainer;Can realize that retainer is once stamping forming, need not machining, while, retainer and roller assembly are more compact when roller is loaded into retainer conveniently and quickly, and avoid the loose set of bearing in the process of installation and disassembly.

Description

Technical Field

[0001] This utility model belongs to the field of bearing technology, and in particular to a full complement long spherical roller bearing. Background Technology

[0002] The current standard full complement long spherical roller bearing lacks a cage, making installation, disassembly, and maintenance cumbersome. The added cage beam acts as a guide between the rollers, significantly reducing the risk of misalignment of the long spherical rollers. Our previous full complement roller bearing with a cage (patent number CN222351175U) used a basket-like structure composed of an inner and outer diameter beam. While this solved the aforementioned problems, the cage required machining after stamping. A single stamping and drafting process couldn't create two intersecting angles; the inner diameter beam needed to be stamped first, the rollers installed, and then the outer diameter beam machined. Otherwise, the outer diameter beam couldn't be formed in a single stamping operation. Pressing the rollers into the cage's basket-like structure was also difficult, as the cage was prone to deformation, making machining challenging and costly. Therefore, a cage that can solve all these problems with a single stamping operation is urgently needed. Utility Model Content

[0003] In view of the above problems, the purpose of this application is to provide a full complement long spherical roller bearing that enables the cage to be stamped in one piece without machining, making it convenient and quick to install the rollers into the cage, while making the cage and roller assembly more compact, and avoiding the bearing from falling apart during installation and disassembly.

[0004] To achieve some or all of the above objectives or other objectives, this application provides the following technical solution: a full complement long spherical roller bearing, comprising an outer ring, rollers, a cage, and an inner ring; the cage includes a crossbeam and a double ring beam, the double ring beams being supported by the crossbeams, and there are multiple crossbeams evenly distributed on the inner end faces of the double ring beams, with the crossbeams near the inner diameter side, and pockets formed between adjacent crossbeams and the double ring beams; the rollers are rolled between the outer ring and the inner ring, with one roller disposed in each pocket; the cage is a one-piece stamped cage.

[0005] Furthermore, the two end faces of the roller are provided with trapezoidal grooves, the upper bottom edge of the trapezoidal groove is close to the center of the roller, the lower bottom edge of the trapezoidal groove is far from the center of the roller, and the depth of the trapezoidal groove gradually decreases from the upper bottom edge to the lower bottom edge; the inner end face of the double ring beam is respectively provided with flanges that match the trapezoidal grooves, and the flanges are interference-fitted with the trapezoidal grooves.

[0006] Furthermore, the inner end face of the double ring beam is provided with a limiting platform, which is set between two adjacent crossbeams, and the height of the limiting platform is less than the height of the flange.

[0007] Furthermore, the cross-section of the beam is a sloping trapezoidal platform structure, the top of the beam is a straight plane, and the two sides of the straight plane of the beam are mutually symmetrical inclined guide surfaces, which are tangent to the roller.

[0008] Furthermore, the roller is a long spherical roller, and the roller surface includes three sections: curved sections at both ends and a planar section in the middle; the generatrix of the inner ring raceway is straight, and the planar section contacts the inner ring raceway, with the contact being a short line contact; the raceway of the outer ring is an arc surface; when the bearing is in operation, the roller and the outer ring raceway are in surface contact.

[0009] Furthermore, the cage is made of a flexible steel plate material.

[0010] Compared with existing technologies, the beneficial effects of this invention are as follows: through innovative structural design and optimized manufacturing process, the performance and manufacturing efficiency of a full complement long spherical roller bearing are significantly improved. Compared with existing technologies, this invention adopts a cage structure formed by one-time stamping, completely changing the complex processes of traditional stamping and machining. This not only simplifies the manufacturing process but also significantly reduces production costs and improves production efficiency. In terms of assembly, the annular pocket design makes roller installation more convenient and efficient, avoiding the risk of damage to rollers and cages during traditional assembly. Regarding performance optimization, the beam structure and limiting platform design effectively constrain the movement trajectory of the rollers. Combined with the trapezoidal grooves and flange matching structure at both ends of the rollers, the risk of roller misalignment is significantly reduced, greatly improving the bearing's operational stability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the retainer of this utility model;

[0012] Figure 2 A cross-sectional view of the cage filled with rollers;

[0013] Figure 3 This is a sectional view of the cage;

[0014] Figure 4 This is a partially enlarged schematic diagram of the cage;

[0015] Figure 5 AA view;

[0016] Figure 6 This is a sectional view of the flange;

[0017] Figure 7 This is a schematic diagram of the structure of this utility model;

[0018] In the diagram: 1. Outer ring, 2. Roller, 201. Trapezoidal groove, 3. Inner ring, 4. Cage, 5. Crossbeam, 501. Straight plane, 502. Inclined guide surface, 6. Double ring beam, 7. Limiting platform, 8. Flange. Detailed Implementation

[0019] To make the structure and function of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] See appendix Figure 1-7 A full complement long spherical roller bearing includes an outer ring 1, rollers 2, a cage 4, and an inner ring 3. The cage 4 includes crossbeams 5 and double ring beams 6, which are supported by the crossbeams 5. There are multiple crossbeams 5, which are evenly distributed on the inner end faces of the double ring beams 6. The crossbeams 5 are located near the inner diameter side, and a pocket is formed between two adjacent crossbeams 5 and the double ring beams. The rollers 2 are rolled between the outer ring 1 and the inner ring 3, and one roller 2 is installed in one pocket. The cage 4 is a one-piece stamped cage 4.

[0021] A full complement long spherical roller bearing with a cage 4 is provided to prevent the rollers 2 from misaligning or rolling together during operation, thus avoiding abnormal bearing damage. The structure of the double ring beam 6 and the crossbeam 5 enhances the overall strength of the cage 4 and prevents the rollers 2 from misaligning.

[0022] The roller 2 has trapezoidal grooves 201 on both end faces. The upper bottom edge of the trapezoidal groove 201 is close to the center of the roller 2, and the lower bottom edge is far from the center of the roller 2. The depth of the trapezoidal groove 201 gradually decreases from the upper bottom edge to the lower bottom edge. The inner end face of the double-ring beam 6 is provided with flanges 8 that match the trapezoidal grooves 201, and the flanges 8 are interference-fitted with the trapezoidal grooves 201. The two ends of the roller 2 are fixed in a trapezoidal shape to increase the contact area between the roller 2 and the flanges 8; the flanges 8 radially limit the movement of the roller 2. The interference fit between the trapezoidal grooves 201 and the flanges 8 forms an oil storage space, extending the grease retention time and improving the service life.

[0023] The inner end face of the double-ring beam 6 is provided with a limiting platform 7, which is located between two adjacent crossbeams 5. The height of the limiting platform 7 is less than the height of the flange 8. The limiting platform 7 axially limits the roller 2 to prevent the roller 2 from deflecting.

[0024] Based on the above technical features, the design of the limiting platform 7 and the flange 8 precisely constrains the axial displacement of the roller 2, preventing the roller 2 from falling off, and is suitable for high impact load conditions. The self-locking structure of the cage 4 and the roller 2 simplifies the disassembly and assembly process and reduces maintenance time.

[0025] The cross section of the beam 5 is a sloping trapezoidal platform structure. The top of the beam 5 is a straight plane 501, and the two sides of the straight plane 501 of the beam 5 are mutually symmetrical inclined guide surfaces 502. The inclined guide surfaces 502 are tangent to the rollers 2, thereby reducing friction with the rollers 2 and lowering the temperature rise.

[0026] The roller 2 is a long spherical roller 2, and the surface of the roller 2 includes three sections: curved sections at both ends and a flat section in the middle; the generatrix of the inner ring 3 raceway is straight, and the flat section contacts the inner ring 3 raceway, with the contact being a short line contact. It can withstand high radial loads, but its self-aligning ability is poor.

[0027] The raceway of the outer ring 1 is an arc surface; when the bearing is running, the roller 2 and the raceway of the outer ring 1 are in surface contact; the outer ring 1 is designed with a large convexity, and the center of the outer ring 1 is not on the center of rotation and is far away, so the bearing can withstand a large axial displacement when in use; the roller 2 and cage 4 assembly can be installed inside the outer ring 1, and the arc surface of the raceway of the outer ring 1 contacts and disperses the load, thus improving the bearing fatigue life.

[0028] The cage 4 is made of elastic steel plate.

[0029] Assembly process: Press the roller 2 radially into the cage 4 pocket, pressing it in from the outer radial direction to the inner diameter direction, and then axially install the cage 4 and roller 2 assembly into the outer ring 1 as a whole, and finally install the inner ring 3.

[0030] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A full complement long spherical roller bearing, characterized in that: It includes an outer ring, rollers, a cage, and an inner ring; the cage includes a crossbeam and a double ring beam, the double ring beams are supported by the crossbeams, there are multiple crossbeams, the multiple crossbeams are evenly distributed on the inner end face of the double ring beams, the crossbeams are close to the inner diameter side, and a pocket is formed between two adjacent crossbeams and the double ring beams; the rollers are rolled between the outer ring and the inner ring, and one roller is installed in one pocket.

2. The full complement long spherical roller bearing according to claim 1, characterized in that: The roller has trapezoidal grooves on both end faces. The upper bottom edge of the trapezoidal groove is close to the center of the roller, and the lower bottom edge of the trapezoidal groove is far from the center of the roller. The depth of the trapezoidal groove gradually decreases from the upper bottom edge to the lower bottom edge. The inner end face of the double ring beam is provided with flanges that match the trapezoidal grooves. The flanges are interference-fitted with the trapezoidal grooves.

3. A full complement long spherical roller bearing according to claim 2, characterized in that: The inner end faces of the double-ring beams are respectively provided with limiting platforms, which are located between two adjacent crossbeams. The height of the limiting platform is less than the height of the flange.

4. A full complement long spherical roller bearing according to claim 1, characterized in that: The cross-section of the beam is a sloping trapezoidal platform structure, with a straight plane at the top and symmetrical inclined guide surfaces on both sides of the straight plane. The inclined guide surfaces are tangent to the rollers.

5. A full complement long spherical roller bearing according to claim 1, characterized in that: The roller is a long spherical roller, and the roller surface includes three sections: curved sections at both ends and a flat section in the middle; the generatrix of the inner ring raceway is straight, and the flat section contacts the inner ring raceway, with the contact being a short line contact; the outer ring raceway is an arc surface; when the bearing is running, the roller and the outer ring raceway are in surface contact.

6. A full complement long spherical roller bearing according to claim 1, characterized in that: The cage is made of flexible steel plate.

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