Dustproof slewing bearing
The dustproof slewing bearing addresses sealing and load-bearing limitations by incorporating sealing rings and a three-layer ball structure, ensuring stability and expanded applicability through enhanced dust prevention and load support.
Patent Information
- Application Number
- CN202421198455.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-29
AI Technical Summary
Slewing bearings, particularly single-row ball slewing bearings, suffer from poor sealing and limited load-bearing capacity, leading to instability and restricted application in machinery due to dust ingress and inadequate support for radial, axial, and tipping loads.
A dustproof slewing bearing design featuring first and second sealing rings, a three-layer ball structure with first and second isolation blocks, and a retaining frame with middle row rollers, enhancing sealing and load-bearing capabilities.
The design effectively prevents dust pollution, improves mechanical stability, and increases the bearing's capacity to handle radial, axial, and tipping loads, allowing wider application in various machinery.
Smart Images
Figure CN222229208U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of slewing bearings, in particular to a dustproof slewing bearing. Background Art
[0002] Slewing bearings are key components of many machines. They can support the weight of the machine and can move or rotate in a stable and controllable manner. Single-row ball slewing bearings play a vital role in the operation of many machines.
[0003] First of all, the slewing bearing mainly plays the role of transmission and support, and the sealing requirement is not high. In a long-term working environment, both the slewing bearing itself and the space between the slewing bearing and the driving gear are easily covered with dust. The dust entering the slewing bearing and transmission parts will affect the stability of mechanical operation.
[0004] In addition, although single-row ball slewing bearings are mostly used in slewing bearings, the radial load, axial load and tipping load borne by single-row ball slewing bearings are relatively weak, and they can only be applied to small machinery and have a relatively low scope of application. Utility Model Content
[0005] In view of the deficiencies of the prior art, the utility model provides a dustproof slewing bearing, which overcomes the deficiencies of the prior art and effectively solves the problems of poor sealing effect and low application range of the single-row ball slewing bearing.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A dustproof slewing bearing comprises an outer ring, the inner wall of the outer ring is rotatably connected to the inner ring, the top and bottom of the inner ring are both bonded with a first sealing ring, and the first sealing ring is tightly attached to the inner wall of the outer ring, the outer wall of the outer ring is rotatably connected to a sealed driving box, and the top outer wall of the sealed driving box is bonded with a second sealing ring, and the second sealing ring is tightly attached to the inner wall of the outer ring;
[0008] The top between the outer ring and the inner ring is respectively provided with first balls and first isolation blocks distributed at equal distances, and the bottom between the outer ring and the inner ring is respectively provided with second balls and second isolation blocks distributed at equal distances, a retaining frame is provided in the middle between the outer ring and the inner ring, and a middle row of rollers distributed at equal distances is provided on the inner wall of the retaining frame.
[0009] Preferably, the outer wall of the outer ring is provided with gear teeth.
[0010] Preferably, the outer wall at the top of the outer ring is provided with first mounting holes distributed at equal distances, and the outer wall at the top of the inner ring is provided with second mounting holes distributed at equal distances.
[0011] Preferably, the tops of the inner walls of the outer ring and the inner ring are respectively provided with an outer top groove and an inner top groove, and the first ball and the first isolation block are both slidably connected to the inner walls of the outer top groove and the inner top groove.
[0012] Preferably, the bottoms of the inner walls of the outer ring and the inner ring are respectively provided with an outer bottom groove and an inner bottom groove, and the second ball and the second isolation block are both slidably connected to the inner walls of the outer bottom groove and the inner bottom groove.
[0013] Preferably, an outer middle groove and an inner middle groove are respectively provided in the middle of the inner walls of the outer ring and the inner ring, and the middle row of rollers are slidably connected to the inner walls of the outer middle groove and the inner middle groove.
[0014] The beneficial effects of the utility model are:
[0015] 1. The dustproof slewing bearing of the present design has a first sealing ring and a second sealing ring respectively arranged at the connection between the outer ring and the inner ring and at the connection between the outer ring and the sealed drive box. The first sealing ring can increase the sealing performance of the slewing bearing itself, and the second sealing ring and the sealed drive box can increase the sealing performance of the transmission structure, which effectively blocks dust pollution and ensures the stability of mechanical operation.
[0016] 2. The dustproof slewing bearing of this design has a three-layer ball structure between the outer ring and the inner ring. The cooperation between the first ball and the first isolation block and the second isolation block and the second ball plays a double-row ball support force, which improves the bearing capacity of the slewing bearing. The retaining frame and the middle row of rollers serve as the third row of ball structures, which further improves the bearing capacity of the slewing bearing and increases the radial load, axial load and tipping load that the slewing bearing can withstand. It can be applied to different types of machinery and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall structure of a dustproof slewing bearing proposed by the utility model;
[0018] Figure 2 This is a schematic diagram of the outer ring and inner ring connection structure of a dustproof slewing bearing proposed by the utility model;
[0019] Figure 3 This is a schematic diagram of the separation structure of the outer ring and inner ring of a dustproof slewing bearing proposed by the utility model;
[0020] Figure 4 The utility model is a schematic diagram of the inner structure of the outer ring of a dustproof slewing bearing.
[0021] In the figure: 1. outer ring; 2. inner ring; 3. first sealing ring; 4. sealed drive box; 5. second sealing ring; 6. first ball; 7. second isolation block; 8. second ball; 9. retaining frame; 10. middle row roller; 11. gear teeth; 12. first mounting hole; 13. second mounting hole; 14. outer top groove; 15. inner top groove; 16. outer bottom groove; 17. inner bottom groove; 18. outer middle groove; 19. inner middle groove; 20. first isolation block. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0023] Embodiment 1, refer to Figure 1 A dustproof slewing bearing comprises an outer ring 1, the inner wall of the outer ring 1 is rotatably connected with an inner ring 2, and the top and bottom of the inner ring 2 are both bonded with a first sealing ring 3, and the first sealing ring 3 is tightly attached to the inner wall of the outer ring 1, the outer wall of the outer ring 1 is rotatably connected with a sealing drive box 4, and the top outer wall of the sealing drive box 4 is bonded with a second sealing ring 5, and the second sealing ring 5 is tightly attached to the inner wall of the outer ring 1.
[0024] In this embodiment, since the first sealing ring 3 and the second sealing ring 5 are respectively provided at the connection between the outer ring 1 and the inner ring 2 and at the connection between the outer ring 1 and the sealed drive box 4, the first sealing ring 3 can increase the sealing performance of the slewing bearing itself, and the second sealing ring 5 and the sealed drive box 4 can increase the sealing performance of the transmission structure, which effectively blocks dust pollution and ensures the stability of mechanical operation.
[0025] Example 2, refer to Figure 3 A dustproof slewing bearing, wherein the top between the outer ring 1 and the inner ring 2 is respectively provided with first balls 6 and first isolation blocks 20 distributed at equal distances, and the bottom between the outer ring 1 and the inner ring 2 is respectively provided with second balls 8 and second isolation blocks 7 distributed at equal distances, a retaining frame 9 is provided in the middle between the outer ring 1 and the inner ring 2, and the inner wall of the retaining frame 9 is provided with middle row rollers 10 distributed at equal distances.
[0026] In this embodiment, a three-layer ball structure is arranged between the outer ring 1 and the inner ring 2. The cooperation between the first ball 6 and the first isolation block 20 and the second isolation block 7 and the second ball 8 plays a double-row ball support force, thereby improving the bearing capacity of the slewing bearing. The retaining frame 9 and the middle row of rollers 10 serve as the third row of ball structures, which further improves the bearing capacity of the slewing bearing and increases the radial load, axial load and tipping load that the slewing bearing can bear. The slewing bearing can be applied to different types of machinery and has a wide range of applications.
[0027] Reference Figure 2 The outer wall of the outer ring 1 is provided with gear teeth 11.
[0028] Reference Figure 2 The outer ring 1 is provided with first mounting holes 12 distributed at equal distances on the top outer wall, and the inner ring 2 is provided with second mounting holes 13 distributed at equal distances on the top outer wall.
[0029] Reference Figures 3 to 4 An outer top groove 14 and an inner top groove 15 are respectively provided at the top of the inner walls of the outer ring 1 and the inner ring 2, and the first ball 6 and the first isolation block 20 are both slidably connected to the inner walls of the outer top groove 14 and the inner top groove 15.
[0030] Reference Figures 3 to 4 The bottom of the inner wall of the outer ring 1 and the inner ring 2 are respectively provided with an outer bottom groove 16 and an inner bottom groove 17, and the second ball 8 and the second isolation block 7 are both slidably connected to the inner walls of the outer bottom groove 16 and the inner bottom groove 17.
[0031] Reference Figures 3 to 4 An outer middle groove 18 and an inner middle groove 19 are respectively arranged in the middle of the inner walls of the outer ring 1 and the inner ring 2, and the middle row rollers 10 are slidably connected to the inner walls of the outer middle groove 18 and the inner middle groove 19.
[0032] Working principle: The first sealing ring 3 and the second sealing ring 5 are respectively arranged at the connection between the outer ring 1 and the inner ring 2 and at the connection between the outer ring 1 and the sealed drive box 4, which not only improves the sealing performance of the slewing bearing itself, but also improves the sealing performance of the transmission structure to prevent dust pollution. On this basis, the first ball 6 and the first isolation block 20, the second isolation block 7 and the second ball 8, the retaining frame 9 and the middle row of rollers 10 serve as the three-row ball structure of the slewing bearing, which greatly improves the radial load, axial load and tipping load that the slewing bearing can withstand.
[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A dustproof slewing bearing, comprising an outer ring (1), characterized in that: The inner wall of the outer ring (1) is rotatably connected to the inner ring (2), and the top and bottom of the inner ring (2) are both bonded with a first sealing ring (3), and the first sealing ring (3) is tightly attached to the inner wall of the outer ring (1); the outer wall of the outer ring (1) is rotatably connected to a sealing drive box (4), and the top outer wall of the sealing drive box (4) is bonded with a second sealing ring (5), and the second sealing ring (5) is tightly attached to the inner wall of the outer ring (1); The top between the outer ring (1) and the inner ring (2) is respectively provided with first balls (6) and first isolation blocks (20) distributed at equal distances, and the bottom between the outer ring (1) and the inner ring (2) is respectively provided with second balls (8) and second isolation blocks (7) distributed at equal distances, and a retaining frame (9) is provided in the middle between the outer ring (1) and the inner ring (2), and the inner wall of the retaining frame (9) is provided with a middle row of rollers (10) distributed at equal distances.
2. A dustproof slewing bearing according to claim 1, characterized in that: The outer wall of the outer ring (1) is provided with gear teeth (11).
3. A dustproof slewing bearing according to claim 1, characterized in that: The outer wall at the top of the outer ring (1) is provided with first mounting holes (12) distributed at equal distances, and the outer wall at the top of the inner ring (2) is provided with second mounting holes (13) distributed at equal distances.
4. The dustproof slewing bearing according to claim 1, characterized in that: An outer top groove (14) and an inner top groove (15) are respectively provided at the top of the inner walls of the outer ring (1) and the inner ring (2), and the first ball (6) and the first isolation block (20) are both slidably connected to the inner walls of the outer top groove (14) and the inner top groove (15).
5. The dustproof slewing bearing according to claim 1, characterized in that: The bottoms of the inner walls of the outer ring (1) and the inner ring (2) are respectively provided with an outer bottom groove (16) and an inner bottom groove (17), and the second ball (8) and the second isolation block (7) are both slidably connected to the inner walls of the outer bottom groove (16) and the inner bottom groove (17).
6. The dustproof slewing bearing according to claim 1, characterized in that: An outer middle groove (18) and an inner middle groove (19) are respectively arranged in the middle of the inner walls of the outer ring (1) and the inner ring (2), and the middle row of rollers (10) are slidably connected to the inner walls of the outer middle groove (18) and the inner middle groove (19).