Single-row four-point contact ball type slewing bearing

Abstract

The utility model belongs to the technical field of slewing bearings, and particularly relates to a single-row four-point contact ball type slewing bearing which comprises an outer ring, an inner ring is arranged on the inner side of the outer ring, embedding grooves are formed in the inner side face of the outer ring and the outer side face of the inner ring, and sealing grooves are formed in the bottom of the outer ring and the top of the inner ring. Sealing seats are integrally formed on the inner side of the top of the outer ring and the outer side of the bottom of the inner ring, sealing convex rings are arranged at the bottom of the sealing seat of the outer ring and the top of the sealing seat of the inner ring, the sealing convex rings are matched with the sealing grooves in an inserted mode, and self-adaptive sealing mechanism mounting grooves are formed in the bottom of the sealing seat of the outer ring and the top of the sealing seat of the inner ring; a spring telescopic column is mounted on the inner side of the self-adaptive sealing mechanism mounting groove, one end of the spring telescopic column is connected with a mounting ring plate, a sealing rubber ring is bonded to one side of the mounting ring plate, and the situation that sealing between the sealing rubber ring and the outer ring and between the sealing rubber ring and the inner ring is not tight due to abrasion can be avoided.

Description

Technical Field

[0001] This utility model belongs to the field of slewing bearing technology, specifically relating to a single-row four-point contact ball slewing bearing. Background Technology

[0002] Single-row four-point contact ball slewing bearing is an important mechanical transmission component, widely used in various engineering machinery and rotary worktables. Structurally, it is a large bearing consisting of two raceways, with the steel balls in four-point contact with the arc raceway, capable of simultaneously bearing axial force, radial force, and overturning moment.

[0003] During the assembly of the slewing bearing, sealing rings are required at the top and bottom of the contact points between the outer and inner rings to prevent impurities from entering and to prevent internal lubricating oil from leaking out. However, with use, the sealing rings will wear down, which will cause the sealing rings to lose tight contact with the inner and outer rings, resulting in a decrease in sealing performance and the occurrence of oil leakage and impurities entering. This necessitates more frequent replacement of the sealing rings. In order to reduce the impact of wear on the sealing performance of the sealing rings and extend the replacement interval, we propose a single-row four-point contact ball slewing bearing. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a single-row four-point contact ball slewing bearing that can avoid the situation where the sealing ring is not properly sealed with the outer and inner rings due to wear.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a single-row four-point contact ball slewing bearing, comprising an outer ring, an inner ring on the inner side of the outer ring, and mounting grooves on both the inner and outer sides of the outer ring. A first mounting guide ring is provided on the inner side of the mounting groove of the outer ring, and a second mounting guide ring is provided on the inner side of the mounting groove of the inner ring. Ball receiving grooves are provided on the sides of both the first and second mounting guide rings. An oil reservoir is provided on the inner side of the first mounting guide ring. A through oil inlet is provided between the side of the outer ring and the mounting groove. The outer ring has a sealing groove at the bottom and the inner ring has a sealing seat integrally formed on the inner side of the top of the outer ring and the outer side of the bottom of the inner ring. The sealing seat of the outer ring has a sealing protrusion at the bottom and the sealing seat of the inner ring has a sealing protrusion that inserts into the sealing groove. The sealing seat of the outer ring has an adaptive sealing mechanism mounting groove at the bottom and the sealing seat of the inner ring has an adaptive sealing mechanism mounting groove. A spring telescopic column is installed on the inner side of the adaptive sealing mechanism mounting groove. One end of the spring telescopic column is connected to the mounting ring plate. A sealing rubber ring is adhered to one side of the mounting ring plate.

[0006] The beneficial effects of this utility model are as follows: When the lubricating oil inside the ball receiving groove is depleted, the lubricating oil inside the oil storage tank can enter the ball receiving groove through the oil outlet to replenish the lubricating oil. Through the storage function of the oil storage tank, the frequency of lubricating oil filling can be reduced, allowing the device to work for a longer period of time. At the same time, the outer and inner rings of this device are sealed by a sealing groove and a sealing seat, and a sealing rubber ring is also provided as a sealing measure, which improves the sealing effect. The sealing rubber ring can make closer contact with the outer and inner rings through the elastic force of the spring telescopic column, improving the sealing performance. As the sealing rubber ring wears during the use of this device, the spring telescopic column can use its elasticity to keep the mounting plate and the sealing rubber ring in a tight state, keeping the sealing rubber ring in contact with the outer and inner rings, thereby avoiding the situation where the sealing rubber ring is not sealed properly with the outer and inner rings due to wear.

[0007] As a further improvement to the above technical solution: the inner ring has an integrally formed internal gear tooth on its inner side.

[0008] The internal gear teeth are used to mesh with the gears driven by the rotary motor in the equipment, thereby enabling the equipment to drive the inner ring to rotate.

[0009] As a further improvement to the above technical solution: the inner side of the ball receiving groove is provided with balls, and the adjacent balls are provided with isolation blocks.

[0010] Ball bearings and spacers are standard components in slewing bearings. They reduce friction between the inner and outer rings during rotation and bear loads. Spacers separate adjacent balls, preventing direct contact. This reduces friction between the balls, decreases wear, and extends the service life of the slewing bearing.

[0011] For the purpose of securing this device on the equipment:

[0012] As a further improvement to the above technical solution: a bolt connection hole is provided between the top and bottom of the outer ring.

[0013] The beneficial effect of this improvement is that the bolt connection hole mates with the bolt, which is used to fix the device on the equipment.

[0014] In order to fix the first and second embedded guide rings:

[0015] As a further improvement to the above technical solution: the top of the mounting groove, the top of the first mounting guide ring and the top of the second mounting guide ring are all provided with positioning wedge mounting grooves, and positioning wedges are provided on the inner side of the positioning wedge mounting grooves.

[0016] The beneficial effects of this improvement are: the positioning wedge mounting groove and the positioning wedge cooperate to fix the first and second embedded guide rings, preventing them from rotating after installation.

[0017] To prevent lubricating oil from leaking out of the oil inlet:

[0018] As a further improvement to the above technical solution: the inner side of the oil inlet is provided with an internal thread, and the inner side of the oil inlet is threadedly connected to the threaded plug through the internal thread.

[0019] The beneficial effect of this improvement is that after the lubricating oil is added, the threaded plug can be used to seal the oil inlet, thereby preventing the lubricating oil from leaking out of the oil inlet.

[0020] For the flow of lubricating oil:

[0021] As a further improvement to the above technical solution: an oil inlet hole is provided through the oil storage tank and the top of the first embedded guide ring, the oil inlet hole is aligned with the bottom end of the oil inlet nozzle, and an oil outlet hole is provided through the oil storage tank and the ball receiving groove.

[0022] The beneficial effects of this improvement are as follows: lubricating oil is injected into the oil reservoir through the oil inlet nozzle and the oil inlet hole, and the lubricating oil in the oil reservoir flows into the ball receiving groove through the oil inlet nozzle.

[0023] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0025] Figure 2 This is a top sectional view of the present invention;

[0026] Figure 3 This is a front sectional view of the present invention;

[0027] Figure 4 This is an isometric sectional view of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure in this utility model where the inner and outer rings are separated;

[0029] Figure 6 This is a schematic diagram of the installation of the spring telescopic column and the mounting ring plate in this utility model;

[0030] In the diagram: 1. Outer ring; 2. Inner ring; 3. Internal gear teeth; 4. Mounting groove; 5. First mounting guide ring; 6. Second mounting guide ring; 7. Ball receiving groove; 8. Positioning wedge mounting groove; 9. Positioning wedge; 10. Ball; 11. Isolation block; 12. Bolt connection hole; 13. Oil reservoir; 14. Oil inlet; 15. Oil inlet nozzle; 16. Internal thread; 17. Threaded plug; 18. Oil outlet; 19. Sealing groove; 20. Sealing seat; 21. Sealing convex ring; 22. Adaptive sealing mechanism mounting groove; 23. Spring telescopic column; 24. Mounting ring plate; 25. Sealing rubber ring. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0032] like Figure 1-6 As shown, a single-row four-point contact ball slewing bearing includes an outer ring 1, an inner ring 2 on the inner side of the outer ring 1, and mounting grooves 4 on both the inner and outer sides of the outer ring 1 and the inner ring 2. A first mounting guide ring 5 is provided inside the mounting groove 4 of the outer ring 1, and a second mounting guide ring 6 is provided inside the mounting groove 4 of the inner ring 2. Ball receiving grooves 7 are provided on the sides of both the first and second mounting guide rings 5 ​​and 6. An oil reservoir 13 is provided inside the first mounting guide ring 5. An oil inlet 15 passes through the side of the outer ring 1 and the mounting groove 4. Sealing elements are provided at the bottom of the outer ring 1 and the top of the inner ring 2. The groove 19 has a sealing seat 20 integrally formed on the inner top of the outer ring 1 and the outer bottom of the inner ring 2. The sealing seat 20 of the outer ring 1 and the sealing seat 20 of the inner ring 2 are both provided with sealing protrusions 21. The sealing protrusions 21 are inserted into the sealing groove 19. The sealing seat 20 of the outer ring 1 and the sealing seat 20 of the inner ring 2 are both provided with self-adaptive sealing mechanism mounting grooves 22. The self-adaptive sealing mechanism mounting grooves 22 are installed with spring telescopic columns 23 on the inner side. One end of the spring telescopic column 23 is connected to the mounting ring plate 24. A sealing rubber ring 25 is bonded to one side of the mounting ring plate 24.

[0033] When the lubricating oil inside the ball receiving groove 7 is depleted, the lubricating oil inside the oil storage tank 13 can enter the ball receiving groove 7 through the oil outlet 18 to replenish the lubricating oil. Through the lubricating oil storage function of the oil storage tank 13, the frequency of lubricating oil filling can be reduced, allowing the device to work for a longer period of time. At the same time, the outer ring 1 and inner ring 2 of this device are sealed by the cooperation of the sealing groove 19 and the sealing seat 20, and a sealing rubber ring 25 is also provided as a sealing measure, which improves the sealing effect. At the same time, the sealing rubber ring 25 can make closer contact with the outer ring 1 and inner ring 2 through the elastic force of the spring telescopic column 23, improving the sealing performance. As the sealing rubber ring 25 wears during the use of this device, the spring telescopic column 23 can use its elasticity to keep the mounting ring plate 24 and the sealing rubber ring 25 in a tight state, so that the sealing rubber ring 25 maintains contact with the outer ring 1 and inner ring 2, thereby avoiding the situation where the sealing rubber ring 25 is not sealed properly with the outer ring 1 and inner ring 2 due to wear.

[0034] The inner ring 2 has an integrally formed internal gear tooth 3 on its inner side.

[0035] The internal gear teeth 3 are used to mesh with the gear driven by the rotary motor in the equipment, thereby enabling the equipment to drive the inner ring 2 to rotate.

[0036] The inner side of the ball receiving groove 7 is provided with a ball 10, and an isolation block 11 is provided between adjacent balls 10.

[0037] The ball bearings 10 and spacer blocks 11 are standard components in slewing bearings. They are used to reduce friction between the inner ring 2 and the outer ring 1 during rotation and to bear loads. The spacer blocks 11 separate adjacent balls, preventing them from contacting each other directly. This reduces friction between the balls, decreases wear, and extends the service life of the slewing bearing.

[0038] A bolt connection hole 12 is provided between the top and bottom of the outer ring 1.

[0039] Bolt connection hole 12 mates with bolts and is used to fix this device on the equipment.

[0040] The top of the mounting groove 4, the top of the first mounting guide ring 5, and the top of the second mounting guide ring 6 are all provided with positioning wedge mounting grooves 8, and positioning wedges 9 are provided on the inner side of the positioning wedge mounting grooves 8.

[0041] The positioning wedge mounting groove 8 and the positioning wedge 9 work together to fix the first embedded guide ring 5 and the second embedded guide ring 6, preventing them from rotating after installation.

[0042] The inner side of the oil inlet 15 is provided with an internal thread 16, and the inner side of the oil inlet 15 is threadedly connected to the threaded plug 17 through the internal thread 16.

[0043] After the lubricating oil is added, the threaded plug 17 can be used to seal the oil inlet 15 to prevent the lubricating oil from leaking out of the oil inlet 15.

[0044] An oil inlet hole 14 is provided between the top of the oil storage tank 13 and the first embedded guide ring 5. The oil inlet hole 14 is aligned with the bottom end of the oil inlet nozzle 15. An oil outlet hole 18 is provided between the oil storage tank 13 and the ball receiving groove 7.

[0045] Lubricating oil is injected into the oil reservoir 13 through the oil inlet 15 and the oil inlet hole 14. The lubricating oil in the oil reservoir 13 flows into the ball receiving groove 7 through the oil inlet 15.

[0046] The working principle and usage process of this utility model are as follows: When adding lubricating oil, the threaded plug 17 is rotated off the internal thread 16. Then, the lubrication gun or other lubrication tools are aligned with the inlet 15 to add lubricating oil. The lubricating oil is injected into the oil reservoir 13 through the inlet 14 and flows into the ball receiving groove 7 through the inlet 15 until the ball receiving groove 7 and the oil reservoir 13 are filled with lubricating oil. Then, the threaded plug 17 can be reconnected to the internal thread 16. When rotating between the outer ring 1 and the inner ring 2, the lubricating oil lubricates the ball 10 and the ball receiving groove 7. When the lubricating oil inside the ball receiving groove 7 is depleted, the lubricating oil inside the oil reservoir 13 can enter the ball receiving groove 7 through the outlet 18 to replenish the lubricating oil. The oil tank 13 stores lubricating oil, reducing the frequency of oil filling and allowing the device to operate for a longer period. The outer ring 1 and inner ring 2 are sealed by a double seal through the sealing groove 19 and sealing seat 20, with an additional sealing ring 25 for better sealing. The sealing ring 25, aided by the elastic force of the spring telescopic column 23, maintains a tighter contact with the outer ring 1 and inner ring 2, enhancing sealing performance. As the sealing ring 25 wears during use, the spring telescopic column 23 uses its elasticity to keep the mounting plate 24 and the sealing ring 25 pressed together, ensuring continued contact between the sealing ring 25 and the outer ring 1 and inner ring 2, thus preventing incomplete sealing due to wear.

[0047] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A single-row four-point contact ball slewing bearing, characterized in that: The outer ring (1) includes an inner ring (2) on its inner side. Both the inner side of the outer ring (1) and the outer side of the inner ring (2) have mounting grooves (4). A first mounting guide ring (5) is provided inside the mounting groove (4) of the outer ring (1), and a second mounting guide ring (6) is provided inside the mounting groove (4) of the inner ring (2). Both the first and second mounting guide rings (5 and 6) have ball receiving grooves (7) on their sides. An oil reservoir (13) is provided inside the first mounting guide ring (5). An oil inlet (15) is provided between the side of the outer ring (1) and the mounting groove (4). A sealing groove (19) is provided at the bottom of the outer ring (1) and the top of the inner ring (2). A sealing seat (20) is integrally formed on the inner top side of the outer ring (1) and the outer bottom side of the inner ring (2). A sealing protrusion (21) is provided on the bottom of the sealing seat (20) of the outer ring (1) and the top of the sealing seat (20) of the inner ring (2). The sealing protrusion (21) is inserted into the sealing groove (19). An adaptive sealing mechanism mounting groove (22) is provided on the bottom of the sealing seat (20) of the outer ring (1) and the top of the sealing seat (20) of the inner ring (2). A spring telescopic column (23) is installed on the inner side of the adaptive sealing mechanism mounting groove (22). One end of the spring telescopic column (23) is connected to the mounting ring plate (24). A sealing rubber ring (25) is bonded to one side of the mounting ring plate (24).

2. A single-row four-point contact ball slewing bearing according to claim 1, characterized in that: The inner ring (2) has an integrally formed internal gear tooth (3) on its inner side.

3. A single-row four-point contact ball slewing bearing according to claim 1, characterized in that: The inner side of the ball receiving groove (7) is provided with balls (10), and an isolation block (11) is provided between adjacent balls (10).

4. A single-row four-point contact ball slewing bearing according to claim 1, characterized in that: A bolt connection hole (12) is provided between the top and bottom of the outer ring (1).

5. A single-row four-point contact ball slewing bearing according to claim 1, characterized in that: The top of the mounting groove (4), the top of the first mounting guide ring (5) and the top of the second mounting guide ring (6) are provided with positioning wedge mounting grooves (8), and positioning wedges (9) are provided on the inner side of the positioning wedge mounting grooves (8).

6. A single-row four-point contact ball slewing bearing according to claim 1, characterized in that: The inner side of the oil inlet (15) is provided with an internal thread (16), and the inner side of the oil inlet (15) is threadedly connected to the threaded plug (17) through the internal thread (16).

7. A single-row four-point contact ball slewing bearing according to claim 1, characterized in that: An oil inlet hole (14) is provided between the top of the oil storage tank (13) and the first embedded guide ring (5), the oil inlet hole (14) is aligned with the bottom end of the oil inlet nozzle (15), and an oil outlet hole (18) is provided between the oil storage tank (13) and the ball receiving groove (7).

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