Portal crane slewing bearing gear lubricating device and portal crane
By installing an automated lubrication device on the slewing bearing gear of the gantry crane, the problems of uneven and untimely lubrication have been solved, achieving efficient gear lubrication and reducing wear and operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO HAIXI HEAVY DUTY MASCH CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-07
AI Technical Summary
In the existing technology, it is difficult to achieve uniform and timely lubrication of the slewing bearing gear of the gantry crane, resulting in severe gear wear. This is especially difficult and costly for manual operation when working at heights.
Design a lubrication device for the slewing bearing gear of a gantry crane. The device is installed at the bottom of the turntable via a bracket. It uses a solid shaft and a lubricating gear to mesh with the outer gear ring of the slewing bearing. Combined with an intelligent lubrication system, it achieves automated lubrication.
It reduces manual operation, saves labor costs, improves gear meshing, reduces gear wear, and solves the problem of inconvenient lubrication at high altitudes.
Smart Images
Figure CN224469636U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lubrication technology for slewing bearing gears of gantry cranes, and in particular to a lubrication device for slewing bearing gears of gantry cranes and a gantry crane. Background Technology
[0002] Previously, lubrication systems on cranes, especially those with open gear drives, were primarily lubricated manually on a regular schedule. This often resulted in uneven or untimely application of grease. Many open gears are mounted high off the ground, making it difficult to move heavy grease containers for application. For example, the slewing bearing of a gantry crane with open gear drives is typically tens of meters above the ground. Given the often loose-cargo handling environment, various dust particles can adhere to the gear teeth. Furthermore, the slewing mechanism experiences significant driving torque. Insufficient or untimely lubrication can easily lead to pitting corrosion of the gears. Over time, this significantly reduces the lifespan of the slewing bearing and can even cause premature failure, which is very costly to replace. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a lubrication device for the slewing bearing gear of a gantry crane and a gantry crane, so as to solve the above-mentioned technical problems.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0005] In a first aspect, a lubrication device for a slewing bearing gear of a gantry crane includes a bracket, the top of which is mounted on the bottom of a turntable. A solid shaft is disposed inside the bracket, the top of which extends into the turntable and is fitted with an oil nozzle. A lubrication gear is mounted on the solid shaft, and the lubrication gear has a gear oil passage. The outer end of the gear oil passage extends to the tooth surface of the lubrication gear. A lubrication oil passage is disposed inside the solid shaft, one end of which is connected to the oil nozzle, and the other end of which is connected to the gear oil passage. The lubrication gear is used to mesh with the outer gear ring of the slewing bearing.
[0006] As a further implementation, the bracket is U-shaped and includes one-piece side plates and a base plate, with the bottom end of the solid shaft fixedly connected to the base plate.
[0007] As a further implementation, an inner spacer is fitted on the outer side of the solid shaft, and an outer spacer is provided on the outer side of the inner spacer, with the outer spacer located inside the lubricating gear.
[0008] As a further implementation, both the inner and outer spacers are provided with annular oil grooves and oil holes communicating with the annular oil grooves to achieve communication with the gear oil passages.
[0009] As a further implementation, bearings are provided on the upper and lower sides of the inner and outer spacers, and end caps are provided on the side of the two sets of bearings that are far apart from each other.
[0010] As a further implementation, a sealing ring is provided inside the end cover, and the sealing ring is located on the side of the end cover near the bearing.
[0011] As a further implementation, the top of the solid shaft is provided with a retaining plate through a retaining groove, and is fixedly connected to the turntable through the retaining plate.
[0012] As a further implementation, the support is provided with a cover on the outside to enclose the internal space of the support.
[0013] As a further implementation, the housing is connected between the two side plates of the bracket.
[0014] Secondly, a gantry crane includes a turntable and a slewing bearing. The bottom of the turntable is provided with a slewing bearing gear lubrication device as described above, wherein the lubrication gear is engaged with the slewing bearing and the oil nozzle is engaged with the oil supply pipe.
[0015] The beneficial effects of this utility model are as follows:
[0016] This utility model discloses a lubrication device for the slewing bearing gear of a gantry crane. The device is mounted on the bottom of the turntable of the slewing bearing of the gantry crane via a bracket, avoiding cumbersome manual operation, greatly saving labor costs, significantly improving gear meshing, and reducing gear wear. The device, mounted on the bottom of the turntable of the slewing bearing of the gantry crane via a bracket, solves the problem of inconvenient lubrication work for slewing bearings, which are typically tens of meters above the ground. Attached Figure Description
[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.
[0018] Figure 1 This is a front view of the lubrication device for the slewing bearing gear of a gantry crane in an embodiment of this utility model;
[0019] Figure 2 This is a side view of the lubrication device for the slewing bearing gear of a gantry crane in an embodiment of this utility model;
[0020] Figure 3 This is a partial structural diagram of the gantry crane in an embodiment of this utility model;
[0021] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.
[0022] The components include: 1. Solid shaft; 2. Bracket; 3. End cover; 4. Sealing ring; 5. Lubricating gear; 6. Snap ring; 7. Bearing; 8. Inner spacer; 9. Outer spacer; 10. Cover; 11. Oil nozzle; 12. Bushing; 13. Snap plate; 14. Turntable; 15. Cylindrical gantry; 16. Slewing bearing; 17. Gear oil passage; 18. Lubricating oil passage; 19. Annular oil groove; 20. Slewing drive gear. Detailed Implementation
[0023] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.
[0024] Example 1
[0025] In a typical embodiment of this utility model, refer to Figure 1 As shown, a lubrication device for the slewing bearing gear of a gantry crane includes a bracket 2. The top of the bracket 2 is installed at the bottom of a turntable 14. A solid shaft 1 is disposed inside the bracket 2, and the top of the solid shaft 1 extends into the turntable 14 and is provided with an oil nozzle 11. A lubrication gear 5 is mounted on the solid shaft 1. The lubrication gear 5 is provided with a gear oil passage 17, and the outer end of the gear oil passage 17 extends to the tooth surface of the lubrication gear 5. A lubrication oil passage 18 is disposed inside the solid shaft 1. One end of the lubrication oil passage 18 is connected to the oil nozzle 11, and the other end is connected to the gear oil passage 17. The lubrication gear 5 is used to mesh with the outer gear ring of the slewing bearing 16.
[0026] like Figure 1 As shown, the bracket 2 is U-shaped and includes two integral side plates and a base plate. The bottom end of the solid shaft 1 is fixedly connected to the center of the base plate. The top of the side plates is fixed to the bottom of the turntable by a flange structure and bolts.
[0027] The steel plate of bracket 2 is 18mm thick and is integrally bent to meet the requirements of rigidity and strength.
[0028] An inner spacer 8 is fitted around the outer side of the solid shaft 1, and an outer spacer 9 is provided outside the inner spacer 8, with the outer spacer 9 located inside the lubricating gear 5. Both the inner spacer 8 and the outer spacer 9 have annular oil grooves and oil holes communicating with the annular oil grooves to achieve communication with the gear oil passages. Bearings 7 are provided on the upper and lower sides of the inner spacer 8 and the outer spacer 9, and an end cap 3 is provided on the circumference of the solid shaft 1 on the side of the two sets of bearings 7 that are far apart from each other. A sealing ring 4 is provided inside the end cap 3, and the sealing ring 4 is located on the side of the end cap 3 near the bearing 7.
[0029] A bushing 12 is provided between the upper end cap and the solid shaft. A retaining plate 13 is provided at the top of the solid shaft 1 through a retaining groove, and is fixedly connected to the turntable through the retaining plate 13. The bushing 12 is arranged between the bearing 7 and the retaining ring 6, and is mainly used for bearing positioning.
[0030] like Figure 1 and Figure 2 As shown, an oil nozzle 11 is located at the center of the top of the solid shaft 1. The oil nozzle 11 is used to connect to the oil supply pipe, which is connected to the intelligent lubrication system of the whole machine. The intelligent lubrication system of the whole machine is existing technology. A lubrication oil passage 18 is provided inside the solid shaft 1 along the axis. The bottom end of the lubrication oil passage 18 extends downward and extends to the outer side of the solid shaft 1 through a transverse lubrication oil passage 18. The height of the transverse lubrication oil passage 18 is adapted to the height of the inner spacer 8.
[0031] The inner side of the inner spacer 8 is provided with an annular oil groove, the height of which is adapted to the height of the transverse lubrication oil passage 18 to achieve communication. The outer side of the inner spacer 8 is evenly distributed with multiple oil holes that communicate with the annular oil groove 19.
[0032] Lubricating oil enters the annular oil groove on the inner side of the inner partition ring 8 through the oil supply pipe, oil nozzle 11, vertical lubricating oil passage 18, and horizontal lubricating oil passage 18, and enters the outer side of the inner partition ring 8 through the oil hole.
[0033] The inner side of the outer spacer 9 is provided with two rings of oil holes at different heights, and the outer side is provided with an annular oil groove that communicates with the corresponding oil holes. There are also two sets of annular oil grooves on the outer spacer 9, so that lubricating oil can enter the annular oil groove on the outer spacer 9 from the space between the inner spacer and the outer spacer through the oil holes on the outer spacer.
[0034] The bearing 7 is located outside the outer spacer 9. The bearing 7 has a gear oil passage 17 inside. Two sets of gear oil passages 17 are arranged along the radial direction of the gear. The height of each set corresponds to and is connected to the annular oil groove of the outer spacer 9, so that the lubricating oil at the annular oil groove of the outer spacer 9 can reach the tooth surface through the gear oil passage 17. With the cooperation of the lubrication gear 5 of the slewing bearing 16, the lubricating oil is applied to the tooth surface of the slewing bearing 16.
[0035] The bracket has a cover on its outer side to seal the internal space. The cover is connected between the two side plates of the bracket, and the bottom of the cover 10 is sealed and fixedly connected to the base plate. The cover 10 serves to prevent lubricating grease from splashing.
[0036] During installation, first, install the grease nipple 11 into the grease nipple mounting hole at the top of the solid shaft 1, press the bearing 7 through the grease nipple end of the solid shaft 1 until it reaches the shoulder, and then press the inner spacer 8 into the solid shaft 1 from the grease nipple end.
[0037] Next, press the lubricating gear 5 into the bearing 7 that has been previously pressed into the solid shaft 1, then press the outer spacer 9 into the inside of the lubricating gear 5, press another bearing 7 into the solid shaft, press the sealing ring 4 into the mounting groove of the end cover 3, and install the end cover 3 on both sides of the lubricating gear 5 with bolts.
[0038] Next, press the bushing 12 into the solid shaft, install the retaining ring 6 in the mounting groove of the solid shaft, and the retaining ring 6 abuts against the bushing 12 to fix it. Install the oilless end of the solid shaft into the mounting hole of the bracket 2 base plate, and install the bracket 2 on the lower surface of the turntable 14 with bolts. At this time, the oil-nose end of the solid shaft extends into the turntable through the turntable mounting hole.
[0039] Finally, the cover 10 is fixed to the bracket 2 with bolts, the retaining plate 13 is installed into the retaining groove of the solid shaft 1, and fixed to the threaded hole of the turntable with bolts to fix the solid shaft and prevent it from rotating.
[0040] This embodiment successfully solves the problem of intelligent lubrication of the slewing bearing gear ring of a gantry crane, avoiding cumbersome manual operation, greatly saving labor costs, significantly improving gear meshing, and reducing gear wear. The device is installed at the bottom of the turntable of the slewing bearing device of the gantry crane via a bracket, solving the problem of inconvenient lubrication work for the slewing bearing device of the gantry crane, which is generally tens of meters above the ground.
[0041] Understandably, the sealing ring is B110*140, meeting the requirements for lubricating grease sealing. The bearing is a 22219E self-aligning roller bearing, thus meeting the requirements for gear rotation and installation. The solid shaft has a diameter of 95mm, thus meeting the requirements for solid shaft rigidity and strength.
[0042] In this embodiment, the outer ring of the slewing bearing 16 with a toothed ring is connected to the flange of the cylindrical gantry 15 by high-strength bolts, and the inner ring of the slewing bearing 16 is connected to the flange of the turntable 14 by high-strength bolts.
[0043] Example 2
[0044] A gantry crane includes a turntable and a slewing bearing. The bottom of the turntable is provided with a slewing bearing gear lubrication device as described in Embodiment 1. The lubrication gear is engaged with the slewing bearing, and the oil nozzle is engaged with the oil supply pipe. There are two sets of slewing bearing gear lubrication devices, which are installed on the lower surface of the turntable and arranged at 90° with the slewing drive gear. There are two sets of slewing drive gears 20 with a spacing of 180°.
[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A lubrication device for the slewing bearing gear of a gantry crane, characterized in that, The system includes a bracket, the top of which is mounted on the bottom of the turntable. A solid shaft is installed inside the bracket, and the top of the solid shaft extends into the turntable and is fitted with an oil nozzle. A lubrication gear is mounted on the solid shaft, and the lubrication gear has a gear oil passage. The outer end of the gear oil passage extends to the tooth surface of the lubrication gear. A lubrication oil passage is also provided inside the solid shaft, with one end of the lubrication oil passage connected to the oil nozzle and the other end connected to the gear oil passage. The lubrication gear is used to mesh with the outer gear ring of the slewing bearing.
2. The lubrication device for the slewing bearing gear of a gantry crane according to claim 1, characterized in that, The bracket is U-shaped and includes two integrated side plates and a base plate. The bottom end of the solid shaft is fixedly connected to the base plate.
3. The lubrication device for the slewing bearing gear of a gantry crane according to claim 1, characterized in that, An inner spacer is fitted on the outside of the solid shaft, and an outer spacer is provided on the outside of the inner spacer. The outer spacer is located inside the lubricating gear.
4. A lubrication device for the slewing bearing gear of a gantry crane according to claim 3, characterized in that, Both the inner and outer spacers are provided with annular oil grooves and oil holes communicating with the annular oil grooves to achieve communication with the gear oil passages.
5. A lubrication device for the slewing bearing gear of a gantry crane according to claim 3, characterized in that, Bearings are provided on the upper and lower sides of the inner and outer spacers, and end caps are provided on the side of the two sets of bearings that are far apart from each other.
6. A lubrication device for the slewing bearing gear of a gantry crane according to claim 5, characterized in that, The end cover is provided with a sealing ring, which is located on the side of the end cover near the bearing.
7. A lubrication device for the slewing bearing gear of a gantry crane according to claim 6, characterized in that, The top of the solid shaft is provided with a retaining plate through a retaining groove, and is fixedly connected to the turntable through the retaining plate.
8. A lubrication device for the slewing bearing gear of a gantry crane according to claim 2, characterized in that, The support has a cover on the outside to enclose the internal space of the support.
9. A lubrication device for the slewing bearing gear of a gantry crane according to claim 8, characterized in that, The cover is connected between the two side plates of the bracket.
10. A gantry crane, characterized in that, It includes a turntable and a slewing bearing. The bottom of the turntable is provided with a slewing bearing gear lubrication device as described in any one of claims 1-9. The lubrication gear is engaged with the slewing bearing, and the oil nozzle is engaged with the oil supply pipe.