Oil-cooled rotary drive

Abstract

The utility model belongs to the field of rotary drive, specifically is an oil cooling type rotary drive device. The utility model discloses through installing oil pump in built-in sealing element, utilizes oil pump to send lubricating oil to the worm shaft, carries out lubrication cooling to worm gear meshing surface, and the oil after cooling enters cooling cavity, and the outside of the shell is led to the outside through the radiating pipe, completes the heat dissipation treatment in the radiating pipe, and the oil after heat dissipation returns to built-in sealing element, and carries out the circulation operation again, and completes the cooling operation of rotary drive device.

Description

Technical Field

[0001] This utility model belongs to the field of rotary drive, specifically an oil-cooled rotary drive device. Background Technology

[0002] The slewing drive unit mainly consists of a worm gear, slewing bearing, housing, and motor. Because the main component is a slewing bearing, it can simultaneously withstand axial force, radial force, and overturning moment. Compared to traditional slewing products, the slewing drive unit uses worm gear transmission, giving it advantages such as easy installation, large reduction ratio, easy maintenance, and greater space saving. This product has a wide range of applications, including heavy-duty flatbed trucks, container cranes, truck-mounted cranes, mining machinery, aerial work platforms, radar devices, solar power systems, construction machinery, and new energy fields. The company's current application, CN 206972893 U, mentions an oil-bath lubricated gear-worm gear combined slewing drive unit. However, because it only uses oil bath cooling, the cooling effect is low and cannot be transferred externally in a timely manner. Furthermore, the heat source is mainly concentrated at the worm gear meshing position. Therefore, the slewing drive unit often suffers from low transmission efficiency, rapid wear, and severe heat generation. Utility Model Content

[0003] The technical problem to be solved by this utility model is: how to solve the problems of low transmission efficiency, rapid wear and severe heat generation in rotary drive devices.

[0004] To solve the above-mentioned technical problems, the inventors of this utility model, through practice and summarization, have derived the technical solution of this utility model, which adopts the following technical solution:

[0005] An oil-cooled rotary drive device is movably mounted with a worm shaft. An internal seal is fixed in the upper cavity. A rotary component is mounted on the outside of the internal seal via rolling elements. A gap is reserved between the rotary component and the outer shell to serve as a cooling chamber. The outer circumferential surface of the rotary component is a worm wheel surface that meshes with the worm shaft. The rotary component, the upper cavity, and the internal seal are all sealed and installed by a skeleton oil seal.

[0006] The worm shaft is provided with a main oil inlet and a branch oil outlet. The main oil inlet is connected to the cooling chamber through the branch oil outlet. An oil reservoir is provided inside the built-in seal, and an oil pump is installed in the oil reservoir. The oil pump is connected to the main oil inlet of the worm shaft through a pipeline. The cooling chamber is connected to the built-in seal through a heat dissipation pipe.

[0007] In a preferred embodiment, the built-in seal includes an inner ring and a cover plate. The inner ring is fixed inside the upper cavity by screws and a sealing ring is provided between the inner ring and the upper cavity. The cover plate is fixed on the upper cavity by screws and seals the upper cavity to form an oil storage tank. The oil pump is installed inside the oil storage tank.

[0008] In a preferred embodiment, the heat dissipation pipe is mounted on the outer casing via a fixed structure. The outer casing is provided with connector one, connector two, and connector three. Connector one is connected to the oil outlet of the oil pump via an internal oil pipe. Connector one is connected to the main oil inlet via an oil guide pipe and a rotary joint. Connector two and connector three are connected via the heat dissipation pipe.

[0009] In a preferred embodiment, the oil outlet branch is oriented on the worm shaft, and multiple sets of oil outlet branches are arranged, distributed at the meshing parts of the worm wheel surface and the worm shaft.

[0010] In a preferred embodiment, multiple sealing rings are arranged between the oil pump and the housing.

[0011] In a preferred embodiment, one end cap is installed at one end of the lower cavity and the other end cap is installed at the other end;

[0012] Both end cap one and end cap two are provided with through openings;

[0013] A sealing ring is provided between the end cap and the outer shell;

[0014] The end cap is installed using a skeleton oil seal and a worm shaft seal.

[0015] In a preferred embodiment, one end of the worm shaft is a transmission connection end, and the other end is a cooling end;

[0016] The main oil inlet is located at the cooling end;

[0017] A rotary joint is installed at the oil inlet of the main oil inlet.

[0018] In a preferred embodiment, the heat dissipation pipe includes an inner pipe and an outer pipe, and the inner pipe is connected to connector two and connector three.

[0019] The outer tube is fitted onto the outside of the inner tube, and the two ends of the outer tube are respectively provided with a coolant inlet and a coolant outlet.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In this case, an oil pump is installed in the built-in seal to deliver lubricating oil to the worm shaft, thereby lubricating and cooling the meshing surface of the worm gear. The cooled oil enters the cooling chamber and is led out of the outer shell through the heat dissipation pipe to complete the heat dissipation treatment inside the heat dissipation pipe. After the heat dissipation is completed, the oil returns to the built-in seal to start the circulation operation again, thus completing the cooling operation of the rotary drive device.

[0022] 2. In this case, an oil sump is formed by sealing the inside of the traditional rotating part with a cover plate and a sealing ring. An oil pump is installed in the oil sump, and the oil pump completes the circulation of lubricating oil inside the device.

[0023] 3. This invention achieves efficient cooling by placing cooling points at the meshing points of the worm gear surface and the worm shaft, and by flushing the meshing points with oil, especially at the root of the worm gear teeth.

[0024] 4. In this case, the lubricating oil is drawn out through the heat dissipation pipe and cooled on the outside of the casing. The cooling operation can be achieved by setting up a heat exchange structure on the outside. For example, the heat dissipation pipe can be made of a material with high thermal conductivity and combined with air cooling. Alternatively, heat dissipation fins can be added to the surface of the heat dissipation pipe to utilize the exchange with air. In this case, a double-layer heat dissipation pipe structure can be used, in which the flow direction of the coolant (water) flowing in the outer pipe and the flow direction of the lubricating oil flowing in the inner pipe are opposite to form convection, thereby ensuring heat exchange efficiency. Attached Figure Description

[0025] Figure 1 Main view of the overall structure of this utility model Figure 1 ;

[0026] Figure 2 This is a partial internal structural diagram of the lower cavity of the overall structure of this utility model;

[0027] Figure 3 This is a horizontal cross-sectional view of the overall structure of this utility model at the middle section;

[0028] Figure 4 This is a vertical cross-sectional view of the overall structure of this utility model from the middle section;

[0029] Figure 5 This is a cross-sectional view of the internal structure of the overall structure of this utility model;

[0030] Figure 6 for Figure 5 A magnified view of a section at point AA;

[0031] Figure 7 This is a schematic diagram of the worm shaft of this utility model;

[0032] Figure 8 for Figure 7 End face view of the worm gear shaft;

[0033] Figure 9 Main view of the overall structure of this utility model Figure 2 ;

[0034] Figure 10 for Figure 9 A schematic diagram of the heat pipe structure.

[0035] In the diagram: 10. Outer shell; 11. Lower cavity; 12. Upper cavity; 13. Worm shaft; 14. Internal seal; 141. Inner ring; 142. Cover plate; 15. Rotating component; 16. Rolling element; 17. Main oil inlet; 18. Branch oil outlet; 19. Oil pump; 20. Cooling pipe; 21. Connector 1; 22. Connector 2; 23. Connector 3; 24. Rotary joint; 25. Oil guide pipe; 26. End cap 1; 27. End cap 2; 28. Inner tube; 29. ​​Outer tube. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0038] Example 1

[0039] like Figure 1 As shown, an oil-cooled rotary drive device includes a housing 10;

[0040] The outer shell 10 is provided with a lower cavity 11 and an upper cavity 12. A worm shaft 13 is rotatably installed in the lower cavity 11. An internal seal 14 is fixed in the upper cavity 12. A rotating part 15 is installed on the outside of the internal seal 14 through a rolling element 16. A gap is reserved between the rotating part 15 and the outer shell 10 to form a cooling cavity. The outer peripheral surface of the rotating part 15 is a worm wheel surface and meshes with the worm shaft 13. The rotating part 15, the upper cavity 12, and the internal seal 14 are all sealed by a skeleton oil seal.

[0041] The worm shaft 13 is provided with an oil inlet main passage 17 and an oil outlet branch passage 18. The oil inlet main passage 17 is connected to the cooling chamber through the oil outlet branch passage 18. An oil storage tank is provided inside the built-in seal 14 and an oil pump 19 is installed in the oil storage tank. The oil pump 19 is connected to the oil inlet main passage 17 of the worm shaft 13 through a pipeline. The cooling chamber is connected to the built-in seal 14 through a heat dissipation pipe 20.

[0042] The oil pump 19 pumps lubricating oil into the worm shaft 13 through pipelines, and then through the main oil inlet 17 and the branch oil outlet 18 into the cooling chamber, completing the oil circulation. The oil in the cooling chamber is led out to the outside of the housing 10 through the heat dissipation pipe 20, where it is cooled. The heat dissipation of the heat dissipation pipe 20 can be achieved by cooling itself and the outside air, or by adding a direct heat exchange structure to the outside of the heat dissipation pipe 20. The oil then enters the built-in seal 14 to complete the circulating cooling operation.

[0043] Example 2

[0044] In Example 1, as Figure 3 and Figure 6 As shown, the built-in seal 14 includes an inner ring 141 and a cover plate 142. The inner ring 141 is fixed inside the upper cavity 12 by screws and a sealing ring is provided between the inner ring 141 and the upper cavity 12. The cover plate 142 is fixed on the upper cavity 12 by screws and seals the upper cavity 12 to form an oil storage tank. The oil pump 19 is installed in the oil storage tank.

[0045] The cover plate 142 and the inner ring 141 form a semi-enclosed structure, which is sealed with the outer shell 10 to obtain an oil storage tank. The oil storage tank is filled with lubricating oil, and the internal oil pump 19 completes the circulation of the lubricating oil, ultimately achieving the effect of cooling the rotary drive device.

[0046] Example 3

[0047] In Example 1, as Figures 1 to 5 As shown, the heat dissipation pipe 20 is mounted on the outer casing 10 via a fixed structure. The outer casing 10 is equipped with connector 1 21, connector 22, and connector 3 23. Connector 1 21 is connected to the oil outlet of the oil pump 19 via an internal oil pipe. Connector 1 21 is also connected to the main oil inlet 17 via an oil guide pipe 25 and a rotary joint 24. Connector 22 and connector 3 23 are connected via the heat dissipation pipe 20. In practical implementation, the corresponding connectors and corresponding pipes are connected to achieve a closed oil circuit, thereby completing the circulation of lubricating oil.

[0048] Example 4

[0049] In Example 1, as Figures 5 to 8 As shown, the oil outlet branch 18 is radially arranged on the worm shaft 13, and multiple sets of oil outlet branches 18 are distributed at the meshing parts of the worm wheel surface and the worm shaft 13. Since heat is mainly generated at the meshing parts, the lubricating oil can directly flush the meshing parts, thus achieving efficient operation and appropriately reducing the number of lubricating oil circulations under the same cooling effect.

[0050] Example 5

[0051] In Example 1, as Figure 6 As shown, multiple sealing rings are arranged between the oil pump 19 and the housing 10. An external lead hole is provided on the housing 10 located inside the sealing rings. The external lead hole is used for the external lead of the oil guide pipe 25. At the same time, the power line and control line of the oil pump 19 are also led out from this point.

[0052] Example 6

[0053] In Example 1, as Figure 5 As shown, one end of the lower cavity 11 is fitted with an end cap 26 and the other end is fitted with an end cap 27.

[0054] Both end cap 26 and end cap 27 are provided with through openings;

[0055] A sealing ring is provided between the end cap and the outer casing 10;

[0056] The end cap is installed by sealing with a skeleton oil seal and worm shaft 13.

[0057] One end of the worm shaft 13 is a transmission connection end, and the other end is a cooling end;

[0058] The main oil inlet line 17 is located at the cooling end;

[0059] A rotary joint 24 is installed at the oil inlet of the main oil inlet 17.

[0060] In practice, the oil inlet at the cooling end can provide dynamic cooling during transmission. Secondly, the oil seal and sealing ring can be used to seal the worm shaft 13 and the lower cavity 11.

[0061] Example 7

[0062] In Example 1, as Figure 9-10 As shown, the heat dissipation pipe 20 includes an inner pipe 28 and an outer pipe 29. The inner pipe 28 is connected to connector 22 and connector 23.

[0063] The outer tube 29 is fitted outside the inner tube 28, and the two ends of the outer tube 29 are respectively provided with a coolant inlet and a coolant outlet.

[0064] Cooling medium (water) is introduced through the outer tube 29, and the cooling medium exchanges heat with the lubricating oil in the inner tube 28. The two flow in opposite directions, creating a convection effect. Furthermore, the inner tube 28 is made of a material with high thermal conductivity, which ensures efficient heat exchange.

[0065] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. An oil-cooled rotary drive device, characterized in that, Including the outer casing (10); The outer shell (10) is provided with a lower cavity (11) and an upper cavity (12). A worm shaft (13) is rotatably installed in the lower cavity (11), and an internal seal (14) is fixed in the upper cavity (12). A rotating part (15) is installed on the outside of the internal seal (14) through a rolling element (16). A gap is reserved between the rotating part (15) and the outer shell (10) to form a cooling cavity. The outer peripheral surface of the rotating part (15) is a worm wheel surface and meshes with the worm shaft (13). The rotating part (15) is sealed with the upper cavity (12) and the internal seal (14) through a skeleton oil seal. The worm shaft (13) is provided with an oil inlet main passage (17) and an oil outlet branch passage (18). The oil inlet main passage (17) is connected to the cooling chamber through the oil outlet branch passage (18). An oil storage tank is provided inside the built-in seal (14), and an oil pump (19) is installed inside the oil storage tank. The oil pump (19) is connected to the oil inlet main passage (17) of the worm shaft (13) through a pipeline. The cooling chamber is connected to the built-in seal (14) through a heat dissipation pipe (20).

2. The oil-cooled rotary drive device according to claim 1, characterized in that, The built-in seal (14) includes an inner ring (141) and a cover plate (142). The inner ring (141) is fixed inside the upper cavity (12) by screws and a sealing ring is provided between it and the upper cavity (12). The cover plate (142) is fixed on the upper cavity (12) by screws and seals the upper cavity (12) to form an oil storage tank. The oil pump (19) is installed in the oil storage tank.

3. The oil-cooled rotary drive device according to claim 1, characterized in that, The heat dissipation pipe (20) is installed on the outer shell (10) by a fixed structure. The outer shell (10) is provided with connector one (21), connector two (22) and connector three (23). Connector one (21) is connected to the oil outlet of the oil pump (19) through the built-in oil pipe. Connector one (21) is connected to the main oil inlet (17) through the oil guide pipe (25) and the rotary joint (24). Connector two (22) and connector three (23) are connected through the heat dissipation pipe (20).

4. The oil-cooled rotary drive device according to claim 1, characterized in that, The oil outlet branch (18) is radially arranged on the worm shaft (13). Multiple sets of oil outlet branches (18) are arranged and distributed at the meshing parts of the worm wheel surface and the worm shaft (13).

5. The oil-cooled rotary drive device according to claim 1, characterized in that, Multiple sealing rings are arranged between the oil pump (19) and the housing (10).

6. The oil-cooled rotary drive device according to claim 1, characterized in that, One end cap (26) is installed at one end of the lower cavity (11), and the other end cap (27) is installed at the other end. Both end cap 1 (26) and end cap 2 (27) are provided with through openings; A sealing ring is provided between the end cap and the outer shell (10); The end cap is sealed and installed by a skeleton oil seal and a worm shaft (13).

7. The oil-cooled rotary drive device according to claim 1, characterized in that, One end of the worm shaft (13) is the transmission connection end, and the other end is the cooling end; The main oil inlet (17) is located at the cooling end; A rotary joint (24) is installed at the oil inlet of the main oil inlet (17).

8. The oil-cooled rotary drive device according to claim 1, characterized in that, The heat dissipation pipe (20) includes an inner pipe (28) and an outer pipe (29), and the inner pipe (28) is connected to connector two (22) and connector three (23); The outer tube (29) is fitted on the outside of the inner tube (28), and the two ends of the outer tube (29) are respectively provided with a coolant inlet and a coolant outlet.

Images