Lubricating and sealing structure of slewing mechanism of gantry crane

Abstract

The utility model discloses a lubrication sealing structure of a slewing mechanism of a gantry crane, and particularly relates to the technical field of sealing of slewing mechanisms of gantry cranes, which comprises a slewing mechanism box body and a rotating shaft inserted in the middle of the slewing mechanism box body, and the bottom end of the rotating shaft is fixedly connected with a stabilizing shaft. According to the utility model, firstly, through the arrangement of the first lubricating oil groove and the second lubricating oil groove, lubricating oil entering between the first plugging ring and the rotating shaft and between the second plugging ring and the stabilizing shaft can be distributed more uniformly, and through the cooperation of the plurality of second oil inlet holes and the first oil inlet holes, the lubricating oil can be more uniformly distributed; lubricating oil in the box body of the slewing mechanism can be supplemented and enter from the periphery, the distribution uniformity of the lubricating oil is improved, abrasion of the sealing rings is avoided, a multi-layer sealing structure can be formed through the multiple sealing rings, sealing pressure is dispersed, vibration and impact borne by the single sealing ring are reduced, the durability of the sealing rings is improved, and the service life of the sealing rings is prolonged. The sealing strength is improved.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for the slewing mechanism of a gantry crane, and more specifically, to a lubrication and sealing structure for the slewing mechanism of a gantry crane. Background Technology

[0002] As an important loading and unloading equipment in ports and docks, the slewing mechanism of the gantry crane is a key component for realizing the spatial transfer of goods. The slewing mechanism is usually composed of a slewing bearing device and a slewing drive device. The slewing bearing device connects the slewing part and the non-slewing part of the crane and bears vertical loads, horizontal loads and overturning moments. The slewing drive device drives the slewing part to achieve slewing motion relative to the non-slewing part. When the gantry crane is working, the slewing mechanism needs to operate frequently, and its lubrication and sealing conditions directly affect the operational stability, service life and maintenance costs of the equipment.

[0003] The existing gantry crane's slewing mechanism has a rotating shaft that rotates on the slewing mechanism housing. Lubricating oil is injected inside the slewing mechanism housing to lubricate the shaft drive gear and drive mechanism to prevent wear. Since one end of the rotating shaft needs to extend out of the slewing mechanism housing, a lubrication sealing structure is required to seal the gap between the rotating shaft and the slewing mechanism housing.

[0004] Existing lubrication seals rely on sealing rings and require manual injection of lubricating oil to lubricate the sealing area. However, manual lubrication can easily lead to uneven distribution of lubricating oil, causing severe wear on the sealing rings in some areas and even resulting in incomplete sealing. Furthermore, the existing sealing structure is too simple to cope with abnormal oscillations of the rotating shaft under complex working conditions. Therefore, a lubrication sealing structure for the slewing mechanism of a gantry crane is proposed. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a lubrication and sealing structure for the slewing mechanism of a gantry crane to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lubrication and sealing structure for the slewing mechanism of a gantry crane, comprising a slewing mechanism housing and a rotating shaft inserted in the middle of the slewing mechanism housing. A stabilizing shaft is fixedly connected to the bottom end of the rotating shaft. A first sealing ring is sleeved in the middle of the rotating shaft to seal the gap between the rotating shaft and the slewing mechanism housing. A second sealing ring is sleeved in the middle of the stabilizing shaft to seal the gap between the stabilizing shaft and the slewing mechanism housing. The inner cavity of the first sealing ring is provided with a first annular groove, a first lubricating oil groove, and a second annular groove.

[0007] A first sealing ring is provided in the middle of the first annular groove, and multiple first oil inlets are provided in the middle of the first lubricating oil groove. A second sealing ring is provided in the middle of the second annular groove. A pressure ring is fixedly connected to the top of the first sealing ring, and a first sealing pressure ring is embedded in the bottom of the pressure ring. A rotating ring is fixedly connected to the top of the pressure ring. Extrusion components are symmetrically arranged on both sides of the pressure ring. The first and second sealing rings can improve the sealing strength between the first sealing ring and the rotating shaft. The first sealing pressure ring can improve the sealing performance between the first sealing ring and the rotating mechanism housing, and facilitate the rotational installation of the pressure ring and the first sealing ring. The extrusion components can extrude and fix the installation position of the pressure ring. The lubricating oil inside the rotating mechanism housing enters the interior of the first lubricating oil groove through the first oil inlet, which can lubricate the first sealing ring and the rotating shaft, improve the rotation effect of the rotating shaft, and avoid wear.

[0008] The second sealing ring has a second lubricating oil groove and a third annular groove in its middle. The second lubricating oil groove has a second oil inlet hole in its middle. The third annular groove has a third sealing ring in its middle. A limit ring is fixedly connected to the bottom of the second sealing ring. A drive ring is fixedly connected to the bottom of the limit ring. A top ring is provided at the bottom of the drive ring. The limit ring has a groove at its top. A second sealing pressure ring is embedded in the middle of the groove. The second sealing pressure ring improves the sealing strength between the second sealing ring and the rotary mechanism housing. The third sealing ring improves the sealing strength between the second sealing ring and the stabilizing shaft. The lubricating oil inside the rotary mechanism housing enters the second lubricating oil groove through the second oil inlet hole, improving the smoothness of the stabilizing shaft rotation and preventing wear.

[0009] Preferably, the first annular groove and the second annular groove are disposed on the upper and lower sides of the first lubricating oil groove, the second sealing ring and the first sealing ring are tightly fitted to the outer surface of the rotating shaft, and the first oil inlet is connected to the inner cavity of the rotary mechanism housing. Through the cooperation of the first sealing ring and the second sealing ring, the lubricating oil between the first sealing ring and the rotating shaft can be prevented from flowing out from both sides, thereby improving the sealing and lubrication effect.

[0010] Preferably, the rotating ring has symmetrically arranged cross-sections on both sides, and the outer surface of the first sealing ring is threadedly connected to the wall of the rotating mechanism housing, which facilitates the rotation of the rotating ring and thus controls the rotation and installation of the first sealing ring.

[0011] Preferably, the extrusion assembly includes threaded rods fixed on both sides of the top of the rotary mechanism housing. An extrusion plate and a nut are sleeved on the top of the threaded rods. The nut is located on the top of the extrusion plate. One end of the extrusion plate extends to the top of the pressure ring. By rotating the nut to extrude the extrusion plate, the extrusion plate can be controlled to extrude the pressure ring, thereby improving the stability of the pressure ring and preventing the pressure ring from rotating and loosening.

[0012] Preferably, the outer surface of the second sealing ring is threaded to the wall of the rotary mechanism housing, and the outer surface of the top ring is threaded to the corresponding groove wall of the rotary mechanism housing. By limiting the second sealing ring with the top ring, the installation stability of the second sealing ring can be improved and loosening can be avoided.

[0013] Preferably, the walls of the first and second sealing rings are tightly fitted to the walls of the rotary mechanism housing. The third sealing ring is located at the bottom of the second lubricating oil groove, and the wall of the third sealing ring is tightly fitted to the outer surface wall of the stabilizing shaft. The third sealing ring prevents the lubricating oil that has entered the second lubricating oil groove from flowing out from the bottom of the gap between the second sealing ring and the stabilizing shaft, thereby improving the sealing effect and providing lubrication.

[0014] Preferably, the second lubricating oil groove is located at the top of the third annular groove, the second oil inlet is located at the top of the second lubricating oil groove, the second oil inlet is connected to the inner cavity of the rotary mechanism housing, and the rotary mechanism housing is provided with an oil inlet pipe and an oil outlet pipe on both sides respectively. The oil inlet pipe facilitates the injection of lubricating oil into the rotary mechanism housing, improving the smoothness of the shaft rotation and avoiding wear.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. This utility model firstly, by setting a first lubricating oil groove and a second lubricating oil groove, can make the distribution of lubricating oil between the first sealing ring and the rotating shaft, and between the second sealing ring and the stabilizing shaft more uniform. Furthermore, by setting multiple second oil inlets in cooperation with the first oil inlet, the lubricating oil inside the rotating mechanism housing can be replenished from all sides, improving the uniformity of lubricating oil distribution and avoiding wear of the sealing ring. Moreover, by setting multiple sealing rings, a multi-layer sealing structure can be formed, dispersing the sealing pressure, reducing the vibration and impact borne by a single sealing ring, improving the durability of the sealing ring, and improving the sealing strength.

[0017] 2. This utility model also limits the installation position of the first sealing ring by setting the compression component, so as to prevent the installation of the first sealing ring from loosening and affecting the sealing between the first sealing ring and the rotary mechanism housing. By using the top ring to compress and limit the installation position of the second sealing ring, the sealing between the second sealing ring and the rotary mechanism housing can be improved, preventing the second sealing ring from loosening, facilitating combination installation and use, improving the stability of installation and sealing strength, and improving the use effect.

[0018] In summary, through the interaction of the above-mentioned multiple effects, the distribution of the incoming lubricating oil can be made more uniform, and the setting of multiple sealing rings can form a multi-layer sealing structure, disperse the sealing pressure, reduce the vibration and impact borne by a single sealing ring, improve the durability of the sealing ring, and improve the sealing strength. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the disassembled structure of the first sealing ring of this utility model.

[0021] Figure 3 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0022] Figure 4 This is a schematic diagram of the split cross-sectional structure of the second sealing ring of this utility model.

[0023] Figure 5 This utility model Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0024] The attached figures are labeled as follows: 1. Rotary mechanism housing; 2. Rotating shaft; 3. Stabilizing shaft; 4. First sealing ring; 5. Pressure ring; 6. Rotating ring; 7. First annular groove; 8. First sealing ring; 9. First lubricating oil groove; 10. First oil inlet; 11. Second annular groove; 12. Second sealing ring; 13. Threaded rod; 14. Extrusion plate; 15. Nut; 16. First sealing pressure ring; 17. Second sealing ring; 18. Limiting ring; 19. Drive ring; 20. Top ring; 21. Second lubricating oil groove; 22. Second oil inlet; 23. Third annular groove; 24. Third sealing ring; 25. Embedded groove; 26. Second sealing pressure ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] As attached Figure 1-5 The lubrication and sealing structure of the slewing mechanism of the gantry crane shown includes a slewing mechanism housing 1 and a rotating shaft 2 inserted in the middle of the slewing mechanism housing 1. A stabilizing shaft 3 is fixedly connected to the bottom end of the rotating shaft 2. A first sealing ring 4 is sleeved in the middle of the rotating shaft 2 to seal the gap between the rotating shaft 2 and the slewing mechanism housing 1. A second sealing ring 17 is sleeved in the middle of the stabilizing shaft 3 to seal the gap between the stabilizing shaft 3 and the slewing mechanism housing 1. The inner cavity of the first sealing ring 4 is provided with a first annular groove 7, a first lubricating oil groove 9, and a second annular groove 11.

[0027] A first sealing ring 8 is provided in the middle of the first annular groove 7, and a plurality of first oil inlets 10 are provided in the middle of the first lubricating oil groove 9. A second sealing ring 12 is provided in the middle of the second annular groove 11. A pressure ring 5 is fixedly connected to the top of the first sealing ring 4, and a first sealing pressure ring 16 is embedded in the bottom of the pressure ring 5. A rotating ring 6 is fixedly connected to the top of the pressure ring 5. Extrusion components are symmetrically arranged on both sides of the pressure ring 5. The sealing strength between the first sealing ring 4 and the rotating shaft 2 can be improved by the first sealing ring 8 and the second sealing ring 12. The sealing performance between the first sealing ring 4 and the rotating mechanism housing 1 can be improved by the first sealing pressure ring 16. It is convenient to rotate and install the pressure ring 5 and the first sealing ring 4. The installation position of the pressure ring 5 can be squeezed and fixed by the extrusion components. The lubricating oil inside the rotating mechanism housing 1 enters the interior of the first lubricating oil groove 9 through the first oil inlet 10, which can lubricate the first sealing ring 4 and the rotating shaft 2, improve the rotation effect of the rotating shaft 2, and avoid wear.

[0028] The second sealing ring 17 has a second lubricating oil groove 21 and a third annular groove 23 in its middle. The second lubricating oil groove 21 has a second oil inlet hole 22 in its middle. The third annular groove 23 has a third sealing ring 24 in its middle. The bottom of the second sealing ring 17 is fixedly connected to a limit ring 18. The bottom of the limit ring 18 is fixedly connected to a drive ring 19. The bottom of the drive ring 19 has a top ring 20. The top of the limit ring 18 has a groove 25. The middle of the groove 25 has a second sealing pressure ring 26. The second sealing pressure ring 26 improves the sealing strength between the second sealing ring 17 and the rotary mechanism housing 1. The third sealing ring 24 improves the sealing strength between the second sealing ring 17 and the stabilizing shaft 3. The lubricating oil inside the rotary mechanism housing 1 enters the interior of the second lubricating oil groove 21 through the second oil inlet hole 22, improving the smoothness of the rotation of the stabilizing shaft 3 and avoiding wear.

[0029] As attached Figure 1-3As shown, the first annular groove 7 and the second annular groove 11 are provided on the upper and lower sides of the first lubricating oil groove 9. The second sealing ring 12 and the first sealing ring 8 are both tightly fitted to the outer surface of the rotating shaft 2. The first oil inlet hole 10 is connected to the inner cavity of the rotary mechanism housing 1. The rotating ring 6 has symmetrically arranged cross-sections on both sides. The outer surface of the first sealing ring 4 is threadedly connected to the wall of the rotary mechanism housing 1. The extrusion assembly includes threaded rods 13 fixed on both sides of the top of the rotary mechanism housing 1. The top of the threaded rods 13 is fitted with an extrusion plate 14 and a nut. 15. Nut 15 is set on the top of extrusion plate 14. One end of extrusion plate 14 extends to the top of pressure ring 5. Through the cooperation of first sealing ring 8 and second sealing ring 12, the lubricating oil between first sealing ring 4 and rotating shaft 2 can be prevented from flowing out from both sides, improving the sealing and lubrication effect. It is convenient to rotate rotating ring 6 to control the rotation installation of first sealing ring 4. By rotating nut 15 to squeeze extrusion plate 14, the extrusion plate 14 can be controlled to squeeze pressure ring 5, improving the stability of pressure ring 5 and preventing pressure ring 5 from rotating loose.

[0030] As attached Figure 1 , 4 As shown in Figure 5, the outer surface of the second sealing ring 17 is threadedly connected to the wall of the rotary mechanism housing 1, and the outer surface of the top ring 20 is threadedly connected to the corresponding groove wall of the rotary mechanism housing 1. The walls of the first sealing ring 16 and the second sealing ring 26 are tightly fitted to the wall of the rotary mechanism housing 1. The third sealing ring 24 is located at the bottom of the second lubricating oil groove 21, and the wall of the third sealing ring 24 is tightly fitted to the outer surface wall of the stabilizing shaft 3. The second lubricating oil groove 21 is located at the top of the third annular groove 23, and the second oil inlet 22 is located at the top of the second lubricating oil groove 21. The second oil inlet 22 is connected to the inner cavity of the rotary mechanism housing 1. Oil inlet pipes and oil outlet pipes are respectively provided on both sides of the rotary mechanism housing 1. By limiting the second sealing ring 17 with the top ring 20, the second sealing ring 17 can be raised. To ensure installation stability and prevent loosening, the third sealing ring 24 prevents lubricating oil from entering the second lubricating oil groove 21 and flowing out from the bottom of the gap between the second sealing ring 17 and the stabilizing shaft 3, thus improving the sealing effect and providing lubrication. The oil inlet pipe facilitates the injection of lubricating oil into the rotary mechanism housing 1, improving the smoothness of the rotation of the shaft 2 and preventing wear. Through the cooperation of multiple second oil inlet holes 22 and the first oil inlet hole 10, lubricating oil can be evenly injected into the interior of the second lubricating oil groove 21 and the first lubricating oil groove 9, improving the uniformity of lubrication. In addition, multiple sealing rings are provided between the first sealing ring 4 and the second sealing ring 17, which can form a multi-layer sealing structure, disperse the sealing pressure, reduce the vibration and impact borne by a single sealing ring, improve the durability of the sealing ring, and improve the sealing strength.

[0031] The working principle of this utility model is as follows: When in use, lubricating oil is filled into the inside of the rotating mechanism housing 1. At this time, the lubricating oil will enter the inside of the second lubricating oil groove 21 through the second oil inlet 22 and enter the inside of the first lubricating oil groove 9 through the first oil inlet 10, thereby improving the smoothness of the rotating ring 6 of the rotating shaft 2 and avoiding wear. At the same time, the sealing performance between the first sealing ring 4 and the rotating shaft 2 can be improved by the third sealing ring 24, the first sealing ring 8, and the second sealing ring 12, and the sealing performance between the second sealing ring 17 and the stabilizing shaft 3 can also be improved.

[0032] Meanwhile, the first sealing ring 4 is threadedly connected to the rotary mechanism housing 1, and the pressure ring 5 is pressed and fixed by the extrusion assembly, which can improve the installation stability of the first sealing ring 4 and prevent it from loosening during rotation. The second sealing ring 17 is threadedly connected to the rotary mechanism housing 1, and the second sealing ring 17 is limited and fixed by the top ring 20, which can improve the sealing strength of the gap between the second sealing ring 17 and the first sealing ring 4 and the rotary mechanism housing 1, and improve the performance.

[0033] 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.

Claims

1. A lubricating sealing structure of a slewing mechanism of a portal crane, comprising a slewing mechanism box (1) and a rotating shaft (2) inserted in the middle of the slewing mechanism box (1), characterized in that: The bottom end of the rotating shaft (2) is fixedly connected with a stabilizing shaft (3), the middle part of the rotating shaft (2) is sleeved with a first plugging ring (4), the middle part of the stabilizing shaft (3) is sleeved with a second plugging ring (17), the inner cavity of the first plugging ring (4) is provided with a first annular groove (7), a first lubricating oil groove (9) and a second annular groove (11); The middle part of the first annular groove (7) is provided with a first sealing ring (8), the middle part of the first lubricating oil groove (9) is provided with a plurality of first oil inlet holes (10), the middle part of the second annular groove (11) is provided with a second sealing ring (12), the top of the first plugging ring (4) is fixedly connected with a press ring (5), the bottom of the press ring (5) is embedded with a first sealing press ring (16), the top of the press ring (5) is fixedly connected with a rotating ring (6), and the two sides of the press ring (5) are symmetrically provided with extrusion assemblies; The middle part of the second plugging ring (17) is provided with a second lubricating oil groove (21) and a third annular groove (23), the middle part of the second lubricating oil groove (21) is provided with a second oil inlet hole (22), the middle part of the third annular groove (23) is provided with a third sealing ring (24), the bottom of the second plugging ring (17) is fixedly connected with a limiting ring (18), the bottom of the limiting ring (18) is fixedly connected with a driving ring (19), the bottom of the driving ring (19) is provided with a top ring (20), the top of the limiting ring (18) is provided with an embedded groove (25), and the middle part of the embedded groove (25) is embedded with a second sealing press ring (26).

2. The lubrication seal structure for a trolley crane slewing mechanism according to claim 1, characterized by: The first annular groove (7) and the second annular groove (11) are arranged on the upper and lower sides of the first lubricating oil groove (9), the second sealing ring (12) and the first sealing ring (8) are tightly attached to the outer surface of the rotating shaft (2), and the first oil inlet hole (10) is in communication with the inner cavity of the rotary mechanism box body (1).

3. The lubrication seal structure for a trolley crane slewing mechanism according to claim 1, characterized by: The two sides of the rotating ring (6) are symmetrically provided with cutting surfaces, and the outer surface of the first plugging ring (4) is threadedly connected with the wall of the rotary mechanism box body (1).

4. The lubrication seal arrangement for a trolley crane slewing mechanism according to claim 1, characterized in that: The extrusion assembly comprises threaded rods (13) fixed on the two sides of the top of the rotary mechanism box body (1), the top of the threaded rod (13) is sleeved with an extrusion plate (14) and a nut (15), the nut (15) is arranged on the top of the extrusion plate (14), and one end of the extrusion plate (14) extends to the top of the press ring (5).

5. The lubrication seal arrangement for a trolley crane slewing mechanism according to claim 1, characterized in that: The outer surface of the second plugging ring (17) is threadedly connected with the wall of the rotary mechanism box body (1), and the outer surface of the top ring (20) is threadedly connected with the corresponding groove wall of the rotary mechanism box body (1).

6. The lubrication seal arrangement for a trolley crane slewing mechanism according to claim 1, characterized in that: The wall bodies of the first sealing press ring (16) and the second sealing press ring (26) are tightly attached to the wall body of the rotary mechanism box body (1), the third sealing ring (24) is arranged at the bottom of the second lubricating oil groove (21), and the wall body of the third sealing ring (24) is tightly attached to the outer surface wall body of the stabilizing shaft (3).

7. The lubrication seal arrangement for a trolley crane slewing mechanism according to claim 1, characterized in that: The second lubricating oil groove (21) is arranged at the top of the third annular groove (23), the second oil inlet hole (22) is located at the top of the second lubricating oil groove (21), the second oil inlet hole (22) is communicated with the inner cavity of the slewing mechanism box (1), and the slewing mechanism box (1) is respectively provided with an oil inlet pipe and an oil outlet pipe on two sides.

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