Self-aligning bearing for high-speed shaft of gearbox and gearbox
By increasing the cage width and reducing the number of rollers, the problem of insufficient bearing strength under complex working conditions was solved, resulting in high-speed and long-life gearbox bearings and reducing equipment maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2026-04-03
AI Technical Summary
Existing bearings have insufficient cage strength and performance under complex operating conditions, making it impossible to simultaneously meet the requirements of high-speed operation and long service life, resulting in increased equipment and maintenance costs.
Design a self-aligning bearing for high-speed shafts in gearboxes, increasing the axial width of the cage to 70-80 mm and reducing the number of rollers, using spherical rollers and a limiting structure to ensure sufficient load-bearing capacity and stability.
The cage strength and stability are improved, the bearing service life is extended, the impact stress and maintenance frequency are reduced, and the requirements of high-speed operation are met.
Smart Images
Figure CN224079470U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gearbox technology, and in particular to a self-aligning bearing for a high-speed shaft of a gearbox and a gearbox. Background Technology
[0002] Bearings are an important component in mechanical equipment. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during movement, and ensure their rotational accuracy.
[0003] In certain industrial applications, such as gearboxes in flat rolling mills for bar and wire rod production, the actual operating conditions are more complex, and the impact loads are more intense. In such cases, existing bearings, due to their small cage space, cannot meet the strength and performance requirements of high-intensity impact conditions. Furthermore, existing standard bearings have certain design limitations. For example, selecting bearings of different speed ranges restricts their operating speed. For some high-speed shaft applications, existing standard bearings (such as standard 23130 self-aligning roller bearings), while meeting the speed requirements, have short service lives, failing to reach their expected rated life. Conversely, selecting bearings with longer lifespans, while meeting the lifespan requirements, reduces the operating speed range, failing to meet the demands of high-speed operation. This necessitates replacing the entire gearbox, increasing equipment and maintenance costs.
[0004] Therefore, there is an urgent need for a self-aligning bearing and gearbox that can be used on the high-speed shaft of a gearbox to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this invention is to provide a self-aligning bearing for high-speed shafts of gearboxes, which can meet the requirements of high-speed operation and has a long service life under complex working conditions.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A self-aligning bearing for a high-speed shaft in a gearbox, comprising:
[0008] Inner circle;
[0009] The outer ring is fitted around the outside of the inner ring and is coaxially arranged with the inner ring;
[0010] A cage is disposed between the inner ring and the outer ring. The axial width of the cage is 70-80 mm, which is greater than the axial width of the guide cage of a standard 23130 self-aligning roller bearing.
[0011] The rolling assembly includes a plurality of first rollers and a plurality of second rollers. The plurality of first rollers are circumferentially spaced along the cage and rotatably connected to one side of the cage. The plurality of second rollers are circumferentially spaced along the cage and rotatably connected to the other side of the cage. Both the first rollers and the second rollers roll in contact with the inner ring and the outer ring. There are 10 to 14 first rollers and 10 to 14 second rollers. The number of first rollers and second rollers is equal and less than the number of rollers in a standard 23130 self-aligning roller bearing.
[0012] Optionally, the inner ring is provided with a first limiting part, and the first roller and the second roller are respectively disposed on both sides of the first limiting part.
[0013] Optionally, the inner ring is provided with a first raceway surface and a second raceway surface, the first raceway surface and the second raceway surface are respectively disposed on both sides of the first limiting part, the first roller abuts against the first raceway surface, and the second roller abuts against the second raceway surface.
[0014] Optionally, the angle between the axis of the first roller and the axis of the inner ring is 10° to 20°, and the angle between the axis of the second roller and the axis of the inner ring is 10° to 20°.
[0015] Optionally, the inner ring is provided with second limiting portions at both ends along its own axial direction, and the first roller and the second roller are both limited between the second limiting portion and the cage.
[0016] Optionally, the axial width of the inner ring is 80 mm, and the axial width of the outer ring is 80 mm.
[0017] Optionally, the inner ring has a first chamfer and a second chamfer at both ends along its own axial direction, the first chamfer extending along the inner peripheral wall of the inner ring, and the second chamfer extending along the outer peripheral wall of the inner ring.
[0018] Optionally, the outer ring has a third chamfer and a fourth chamfer at both ends along its own axial direction. The third chamfer extends along the inner peripheral wall of the outer ring, and the fourth chamfer extends along the outer peripheral wall of the outer ring.
[0019] Optionally, the outer ring includes a first ring body, a second ring body, and a washer, wherein the first ring body and the second ring body face each other and are coaxially arranged, and the washer is sandwiched between the first ring body and the second ring body.
[0020] Another objective of this invention is to provide a gearbox that can meet the requirements of high-speed operation and has a long service life under complex working conditions.
[0021] To achieve this objective, the present invention adopts the following technical solution:
[0022] A gearbox includes a shaft and a self-aligning bearing for a high-speed shaft of the gearbox as described above, the shaft being connected to the inner ring.
[0023] The beneficial effects of this utility model are:
[0024] This utility model provides a self-aligning bearing for a high-speed shaft of a gearbox and a gearbox. The self-aligning bearing for the high-speed shaft of the gearbox includes an inner ring, an outer ring, a cage, and rolling elements. The outer ring is fitted outside the inner ring and is coaxially arranged with the inner ring. The cage is disposed between the inner and outer rings, and the axial width of the cage is 70-80 mm, which is greater than the axial width of the guide cage of a standard 23130 self-aligning roller bearing. By increasing the axial width of the cage, the strength and stability of the cage can be improved, making it less prone to deformation under high-intensity impact conditions, effectively extending the service life of the bearing, and avoiding frequent maintenance and replacement due to cage damage. The rolling assembly includes multiple first rollers and multiple second rollers. The first rollers are spaced circumferentially along the cage and rotatably connected to one side of the cage. The second rollers are also spaced circumferentially along the cage and rotatably connected to the other side of the cage. Both the first and second rollers roll in contact with the inner and outer rings. There are 10 to 14 first rollers and 10 to 14 second rollers, with the number of first and second rollers being equal and fewer than the number of rollers in a standard 23130 self-aligning roller bearing. By reducing the number of first and second rollers, the bearing can ensure sufficient load-bearing capacity, and space is saved to increase the radial width of the cage, thereby improving the strength and stability of the cage. The gearbox includes a shaft and a self-aligning bearing for the high-speed shaft of the gearbox, with the shaft connected to the inner ring. With the above configuration, the self-aligning bearing for the high-speed shaft of the gearbox of this application can meet the requirements of high-speed operation and has a long service life under complex working conditions. Attached Figure Description
[0025] Figure 1 This is a cross-sectional view of the self-aligning bearing for the high-speed shaft of a gearbox provided in an embodiment of this utility model;
[0026] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0027] Figure 3 This is a schematic diagram of the inner ring provided in an embodiment of the present utility model;
[0028] Figure 4 This is a schematic diagram of the outer ring provided in an embodiment of the present invention.
[0029] In the picture:
[0030] 1. Inner ring; 11. First limiting part; 12. First raceway surface; 13. Second raceway surface; 14. Second limiting part; 15. First chamfer; 16. Second chamfer; 2. Outer ring; 21. Third chamfer; 22. Fourth chamfer; 23. First ring body; 24. Second ring body; 25. Washer; 3. Cage; 4. Rolling assembly; 41. First roller; 42. Second roller. Detailed Implementation
[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0035] Bearings are an important component in mechanical equipment. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during movement, and ensure their rotational accuracy.
[0036] In certain industrial applications, such as gearboxes in flat rolling mills for bar and wire rod production, the actual operating conditions are more complex, and the impact loads are more intense. In such cases, existing bearings, due to their small cage space, cannot meet the strength and performance requirements of high-intensity impact conditions. Furthermore, existing standard bearings have certain design limitations. For example, selecting bearings of different speed ranges restricts their operating speed. For some high-speed shaft applications, existing standard bearings (such as standard 23130 self-aligning roller bearings), while meeting the speed requirements, have short service lives, failing to reach their expected rated life. Conversely, selecting bearings with longer lifespans, while meeting the lifespan requirements, reduces the operating speed range, failing to meet the demands of high-speed operation. This necessitates replacing the entire gearbox, increasing equipment and maintenance costs.
[0037] Therefore, there is an urgent need for a self-aligning bearing and gearbox that can be used on the high-speed shaft of a gearbox to solve the above-mentioned technical problems.
[0038] like Figures 1-4 As shown, this embodiment provides a self-aligning bearing for a high-speed shaft of a gearbox, which includes an inner ring 1, an outer ring 2, a cage 3, and a rolling assembly 4. The outer ring 2 is fitted outside the inner ring 1 and is coaxially arranged with the inner ring 1. The cage 3 is arranged between the inner ring 1 and the outer ring 2. The axial width of the cage 3 is 70-80mm, which is greater than the axial width of the guide cage of the standard 23130 self-aligning roller bearing. The rolling assembly 4 includes a plurality of first rollers 41 and a plurality of second rollers 42. The plurality of first rollers 41 are spaced apart circumferentially along the cage 3 and rotatably connected to one side of the cage 3. The plurality of second rollers 42 are spaced apart circumferentially along the cage 3 and rotatably connected to the other side of the cage 3. The first rollers 41 and the second rollers 42 are both in rolling contact with the inner ring 1 and the outer ring 2. There are 10-14 first rollers 41 and 10-14 second rollers 42. The number of first rollers 41 and the number of second rollers 42 are equal and less than the number of rollers in the standard 23130 self-aligning roller bearing.
[0039] In this embodiment, the outer ring 2 is fitted outside the inner ring 1 and is coaxially arranged with the inner ring 1. The cage 3 is disposed between the inner ring 1 and the outer ring 2. The axial width of the cage 3 is 70-80mm, which is greater than the axial width of the guide cage (equivalent to the cage 3) of the standard 23130 self-aligning roller bearing. By increasing the axial width of the cage 3, the strength and stability of the cage 3 can be improved, making it less prone to deformation under high-intensity impact conditions. This can effectively extend the service life of the bearing and avoid frequent maintenance and replacement due to damage to the cage 3. The rolling assembly 4 includes multiple first rollers 41 and multiple second rollers 42. The first rollers 41 are spaced circumferentially along the cage 3 and rotatably connected to one side of the cage 3. The second rollers 42 are spaced circumferentially along the cage 3 and rotatably connected to the other side of the cage 3. Both the first rollers 41 and the second rollers 42 roll in contact with the inner ring 1 and the outer ring 2. There are 10 to 14 first rollers 41 and 10 to 14 second rollers 42. The number of first rollers 41 and second rollers 42 is equal and less than the number of rollers in a standard 23130 self-aligning roller bearing. By reducing the number of first rollers 41 and second rollers 42, the bearing can ensure sufficient load-bearing capacity, and space is saved to increase the radial width of the cage 3, thereby improving the strength and stability of the cage 3. With the above configuration, the self-aligning bearing for the high-speed shaft of the gearbox in this embodiment can meet the requirements of high-speed operation and has a long service life under complex working conditions.
[0040] It should be noted that, in this embodiment, according to ISO 15, the axial width of the guide cage of a standard 23130 self-aligning roller bearing is 30-60 mm, and the number of rollers on one side of a standard 23130 self-aligning roller bearing is 15-20. For the self-aligning bearing used in the high-speed shaft of the gearbox in this embodiment, the axial width of the cage 3 is 75 mm, which is greater than the axial width of the guide cage of a standard 23130 self-aligning roller bearing (30-60 mm); the number of the first roller 41 and the second roller 42 is 12 each, which is less than the number of rollers in a standard 23130 self-aligning roller bearing (15-20).
[0041] In other embodiments, the axial width of the cage 3 can be set to 70mm or 80mm, and the number of the first roller 41 (or the second roller 42) can be set to 10, 13 or 14. The specific parameters of the above components are not limited here.
[0042] The specific structure of the self-aligning bearing used in the high-speed shaft of the gearbox is described below:
[0043] Specifically, such as Figure 1 and Figure 2As shown, the inner ring 1 is provided with a first limiting part 11, and the first roller 41 and the second roller 42 are respectively disposed on both sides of the first limiting part 11, which can effectively limit the axial displacement of the first roller 41 and the second roller 42, thereby improving the operating stability and reliability of the bearing.
[0044] More specifically, in this embodiment, the first limiting part 11 is an annular protrusion, which is not only simple in structure and easy to process, but also can limit the first roller 41 and the second roller 42, preventing the first roller 41 and the second roller 42 from axially moving during operation.
[0045] Moreover, in this embodiment, the first roller 41 and the second roller 42 are both spherical rollers. By contacting the inner ring 1 and the outer ring 2, they can effectively transfer and distribute the load, while ensuring the self-aligning function of the bearing, so that the shaft connected to the self-aligning bearing can still operate normally when there is a slight angular deviation.
[0046] Specifically, such as Figure 1 and Figure 2 As shown, the inner ring 1 has a first raceway surface 12 and a second raceway surface 13, which are respectively located on both sides of the first limiting part 11. The first roller 41 abuts against the first raceway surface 12, and the second roller 42 abuts against the second raceway surface 13. This arrangement ensures more uniform contact between the first roller 41 and the second roller 42 and their corresponding raceway surfaces, thereby improving the uniformity of load distribution, reducing local stress concentration, and ultimately enhancing the bearing's load-bearing capacity and service life.
[0047] Specifically, the angle between the axis of the first roller 41 and the axis of the inner ring 1 is 10° to 20°, and the angle between the axis of the second roller 42 and the axis of the inner ring 1 is 10° to 20°. For the shaft mounted on the self-aligning bearing, when the shaft deviates during operation, the above-mentioned angle settings enable the first roller 41 and the second roller 42 to better adapt to the small angular deviation of the shaft, thereby realizing the automatic self-aligning function, which is beneficial to improving the adaptability and reliability of the bearing under complex working conditions.
[0048] More specifically, in this embodiment, the angle between the axis of the first roller 41 and the axis of the inner ring 1, and the angle between the axis of the second roller 42 and the axis of the inner ring 1, are both 15°. In other embodiments, the angle between the axis of the first roller 41 and the axis of the inner ring 1 can be set to 10°, 18°, or 20°, and the angle between the axis of the second roller 42 and the axis of the inner ring 1 can be set to 10°, 18°, or 20°, without further limitation.
[0049] Specifically, such as Figure 1 and Figure 2As shown, the inner ring 1 has a second limiting part 14 at both ends along its own axial direction. The first roller 41 and the second roller 42 are both limited between the second limiting part 14 and the cage 3, so that the first roller 41 and the second roller 42 always remain in the correct position during operation, which improves the operating stability and reliability of the bearing.
[0050] More specifically, in this embodiment, the second limiting part 14 is an annular protrusion, with two annular protrusions respectively encircling the outer peripheral walls of the inner ring 1 at both ends along its own axis. By setting the annular protrusions, not only is the structure simple and easy to process, but it can also limit the first roller 41 and the second roller 42, preventing the first roller 41 and the second roller 42 from axially moving during operation.
[0051] Specifically, the axial width of the inner ring 1 is 80mm, and the axial width of the outer ring 2 is 80mm, which ensures that the overall structure of the bearing is compact and easy to install and maintain.
[0052] Specifically, such as Figure 3 As shown, the inner ring 1 has a first chamfer 15 and a second chamfer 16 at both ends along its own axial direction. The first chamfer 15 extends along the inner peripheral wall of the inner ring 1, and the second chamfer 16 extends along the outer peripheral wall of the inner ring 1. This arrangement can remove burrs on the inner ring 1, avoid stress concentration, improve the machining accuracy and surface quality of the inner ring 1, and thus help extend the service life of the inner ring 1.
[0053] Specifically, such as Figure 4 As shown, the outer ring 2 has a third chamfer 21 and a fourth chamfer 22 at both ends along its own axial direction. The third chamfer 21 extends along the inner peripheral wall of the outer ring 2, and the fourth chamfer 22 extends along the outer peripheral wall of the outer ring 2. This arrangement can remove burrs on the outer ring 2, avoid stress concentration, improve the processing accuracy and surface quality of the outer ring 2, and thus help extend the service life of the outer ring 2.
[0054] More specifically, such as Figure 4 As shown, the outer ring 2 includes a first ring body 23, a second ring body 24, and a washer 25. The first ring body 23 and the second ring body 24 face each other and are coaxially arranged, with the washer 25 sandwiched between the first ring body 23 and the second ring body 24. It is understood that in this embodiment, the split-structure design of the outer ring 2 improves its assembly flexibility and facilitates processing and maintenance. Furthermore, the use of the washer 25 enhances the structural stability and reliability of the outer ring 2.
[0055] In other embodiments, the outer ring 2 can adopt a one-piece structural design, which can provide higher overall strength and rigidity, ensuring the stability of the outer ring 2 under high loads and complex working conditions. No specific limitations are placed on the design of the outer ring 2, as long as the aforementioned functions are achieved.
[0056] This embodiment also provides a gearbox, which includes a rotating shaft and the aforementioned self-aligning bearing for the high-speed shaft of the gearbox. The rotating shaft is connected to the inner ring 1, which can meet the requirements of high-speed operation and has a long service life under complex working conditions. By adopting the self-aligning bearing for the high-speed shaft of the gearbox in this embodiment, compared with the existing standard 23130 self-aligning roller bearing, experimental data shows that the impact stress of the cage 3 is reduced by 50%, and the impact safety factor of the cage 3 is increased by 100%. Moreover, the cage 3 in this embodiment is made of brass, which further increases the strength of the cage 3 by 10%, thereby solving the failure problem of the gearbox in the flat rolling mill of bar and wire rod rolling line.
[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A self-aligning bearing for a high speed shaft of a gear box, characterized in that, The application relates to a bearing, which comprises the following parts: an inner ring (1); an outer ring (2) arranged on the outer side of the inner ring (1) and coaxial with the inner ring (1); a retainer (3) arranged between the inner ring (1) and the outer ring (2), wherein the axial width of the retainer (3) is 70-80 mm and is greater than the axial width of a guide frame of a standard 23130 self-aligning roller bearing; a rolling assembly (4) comprising a plurality of first rollers (41) and a plurality of second rollers (42), wherein the first rollers (41) are arranged at intervals along the circumference of the retainer (3) and are rotatably connected to one side of the retainer (3), the second rollers (42) are arranged at intervals along the circumference of the retainer (3) and are rotatably connected to the other side of the retainer (3), the first rollers (41) and the second rollers (42) are in rolling contact with the inner ring (1) and the outer ring (2), the first rollers (41) are provided in a number of 10-14, the second rollers (42) are provided in a number of 10-14, the number of the first rollers (41) is equal to that of the second rollers (42), and the number of the first rollers (41) and the second rollers (42) is less than that of rollers of the standard 23130 self-aligning roller bearing.
2. The aligning bearing for a high speed shaft of a gear box as claimed in claim 1, wherein, The inner ring (1) is provided with a first limiting part (11), and the first rollers (41) and the second rollers (42) are arranged on the two sides of the first limiting part (11).
3. The aligning bearing for a high speed shaft of a gear box as claimed in claim 2, characterized in that, The inner ring (1) is provided with a first raceway surface (12) and a second raceway surface (13), and the first raceway surface (12) and the second raceway surface (13) are arranged on the two sides of the first limiting part (11), the first rollers (41) abut against the first raceway surface (12), and the second rollers (42) abut against the second raceway surface (13).
4. The aligning bearing for a high speed shaft of a gear box as claimed in claim 1, wherein, The included angle between the axis of the first roller (41) and the axis of the inner ring (1) is 10-20 degrees, and the included angle between the axis of the second roller (42) and the axis of the inner ring (1) is 10-20 degrees.
5. The aligning bearing for a high speed shaft of a gear box as claimed in claim 1, wherein, The inner ring (1) is provided with a second limiting part (14) at each end along the axial direction, and the first rollers (41) and the second rollers (42) are limited between the second limiting part (14) and the retainer (3).
6. The aligning bearing for a high speed shaft of a gear box as claimed in claim 1, wherein, The axial width of the inner ring (1) is 80 mm, and the axial width of the outer ring (2) is 80 mm.
7. The aligning bearing for a high speed shaft of a gear box as claimed in claim 1, wherein, The inner ring (1) is provided with a first chamfer (15) and a second chamfer (16) at each end along the axial direction, the first chamfer (15) extends along the inner circumferential wall of the inner ring (1), and the second chamfer (16) extends along the outer circumferential wall of the inner ring (1).
8. The aligning bearing for a high speed shaft of a gear box as claimed in claim 1, wherein, The outer ring (2) is provided with a third chamfer (21) and a fourth chamfer (22) at each end along the axial direction, the third chamfer (21) extends along the inner circumferential wall of the outer ring (2), and the fourth chamfer (22) extends along the outer circumferential wall of the outer ring (2).
9. A plmg bearing for a high speed shaft of a gear box according to any of claims 1-8, characterized in that, The outer ring (2) comprises a first ring body (23), a second ring body (24) and a gasket (25), the first ring body (23) and the second ring body (24) are arranged oppositely and coaxially, and the gasket (25) is clamped between the first ring body (23) and the second ring body (24).
10. A gear box characterized by, The application relates to a pin bearing for a high-speed shaft of a gear box, comprising a shaft and a pin bearing according to any one of claims 1 to 9, the shaft being connected to the inner ring (1).