Silicone oil filling mechanism

Abstract

The utility model relates to the technical field of silicone oil filling, and discloses a silicone oil filling mechanism which comprises a filling barrel and a supporting frame, the left end of the top of the filling barrel is fixedly connected with a feeding pipe, the top side of the filling barrel is fixedly connected with a protection column, and the interior of the protection column is fixedly connected with a driving assembly for driving subsequent components to rotate. And a discharging pipe is fixedly connected to the bottom end of the filling barrel, a supporting ring is fixedly connected to the outer side wall of the discharging pipe, a rotating plate is rotationally connected to the outer portion of the supporting ring, a connecting column is fixedly connected to the side, away from the protective column, of the driving assembly, and an electric push rod is fixedly connected to the top side of the inner wall of the connecting column. According to the utility model, when the two trapezoidal plates are in contact with each other, residual silicone oil in the trapezoidal plates can slowly flow onto the trapezoidal plates, and then the situation of dripping leakage is prevented, so that the dripping silicone oil does not need to be cleaned by manpower, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicone oil filling, in particular to a silicone oil filling mechanism. Background Art

[0002] Silicone oil is generally a colorless and transparent liquid. Some silicone oils appear light yellow or light blue due to impurities or special treatment. Silicone oil has good lubricity, glossiness and breathability, and is widely used in cosmetics such as shampoo, conditioner, skin care products, makeup, etc., which can improve the product's feel and appearance.

[0003] When filling silicone oil, first inject the silicone oil into the filling head, and then open the discharge pipe, the silicone oil flows down by gravity and falls into the collection tank. Then, by stirring, the various components in the silicone oil can be fully mixed and restored to a uniform state, thereby ensuring the quality stability and consistency of the filled product.

[0004] In most existing silicone oil filling mechanisms, after filling, the silicone oil has a high viscosity, which causes it to adhere to and remain inside the discharge port. After filling, even after the discharge port valve is closed, the silicone oil does not flow out as quickly as low-viscosity liquids. Instead, it forms a thin liquid film on the inner wall of the discharge port, gradually converging into droplets that slowly fall under the influence of gravity. This requires human resources to clean up the fallen silicone oil, increasing production costs. Therefore, to address these shortcomings, a silicone oil filling mechanism has been proposed to address these issues. Summary of the Invention

[0005] In order to make up for the above shortcomings, the present invention provides a silicone oil filling mechanism, which aims to improve the problem in the prior art that some silicone oil filling mechanisms may leak after filling, resulting in the consumption of manpower to clean the leaked silicone oil and increased production costs.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The silicone oil filling mechanism comprises a filling barrel and a support frame, the top left end of the filling barrel is fixedly connected to a feeding pipe, the top side of the filling barrel is fixedly connected to a protective column, the interior of the protective column is fixedly connected to a driving assembly that drives subsequent components to rotate, the bottom end of the filling barrel is fixedly connected to a discharge pipe, the outer wall of the discharge pipe is fixedly connected to a supporting ring, the outer side of the supporting ring is rotatably connected to a rotating plate, the driving assembly is fixedly connected to a connecting column on a side away from the protective column, the top side of the inner wall of the connecting column is fixedly connected to an electric push rod, the driving end of the electric push rod is fixedly connected to an I-shaped plate, the two I-shaped plates are rotatably connected to a rotating plate at one end away from each other, the two rotating plates are rotatably connected to an opening plate at one end away from each other, the opening plate is fixedly connected to a trapezoidal plate on one side away from the connecting column, and the two trapezoidal plates are fixedly connected to a limiting plate at one end away from each other;

[0008] As a further description of the above technical solution:

[0009] The top side of the support frame is fixedly connected to a connecting frame, a conveyor belt is installed inside the connecting frame, the right end of the support frame is fixedly connected to a connecting box, the inside of the connecting box is fixedly connected to a power assembly that drives subsequent components to rotate, the top side of the power assembly is fixedly connected to a circular plate, the far end of the top side of the circular plate is fixedly connected to a fixing column, the outside of the fixing column is slidably connected to an opening frame, the far side of the two opening frames are fixedly connected to a hook-shaped plate, the right end of the connecting frame is fixedly connected to a plurality of guide frames, and the near side of the two hook-shaped plates are fixedly connected to an adjusting plate;

[0010] As a further description of the above technical solution:

[0011] Two right-angled plates are fixedly connected to the rear side of the support frame, a front end of one of the right-angled plates close to the side of the support frame is fixedly connected to a cylinder, and the front end of the other right-angled plate is fixedly connected to the rear side of the filling barrel, a driving end of the cylinder is fixedly connected to a disc, two connecting rods are fixedly connected to the top side of the inner wall of the filling barrel, and the bottom sides of the two connecting rods are fixedly connected to a connecting ring, the interior of the connecting ring is fixedly connected to a water inlet pipe, the top of the driving assembly is fixedly connected to a rotating ring, and nozzles are fixedly connected to the four sides of the rotating ring;

[0012] As a further description of the above technical solution:

[0013] The drive assembly includes a motor 1, the exterior of the motor 1 is fixedly connected to the interior of the protective column, the driving end of the motor 1 is fixedly connected to a rotating shaft, the exterior of the rotating shaft is fixedly connected to a connecting plate, the far sides of the connecting plate are fixedly connected to scrapers, the left and right sides of the rotating shaft are fixedly connected to a plurality of stirring paddles, and the bottom side of the rotating shaft is fixedly connected to the top side of the connecting column;

[0014] As a further description of the above technical solution:

[0015] The outer portions of the two trapezoidal plates are respectively slidably connected to the inner wall of the far end of the rotating plate, and the outer portions of the two limiting plates are respectively slidably connected to the inner wall of the far end of the rotating plate, and the adjacent sides of the two trapezoidal plates are in contact;

[0016] As a further description of the above technical solution:

[0017] The power assembly includes a second motor, the exterior of the second motor is fixedly connected to the interior of the connection box, and the driving end of the second motor is fixedly connected to a rotating shaft;

[0018] As a further description of the above technical solution:

[0019] The top side of the rotating shaft is fixedly connected to the bottom side of the circular plate, and the outer portion of the hook-shaped plate is slidably connected to the inner portions of the two guide frames;

[0020] As a further description of the above technical solution:

[0021] The top end of the rotating shaft is fixedly connected to the inner wall of the rotating ring, and the outer portion of the connecting ring is rotatably connected to the inner wall of the top end of the rotating ring.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, the opening size of the rotating plate is changed by adjusting the position of the trapezoidal plate in the rotating plate, thereby controlling the outflow of silicone oil in the discharge pipe and realizing the silicone oil filling operation of the oil filling container. When the two trapezoidal plates are in contact, the residual silicone oil inside will slowly flow to the trapezoidal plates, and then prevent dripping. Then, there is no need to consume manpower to clean up the dripping silicone oil, thereby saving production costs.

[0024] 2. In the present invention, the fixed column is driven to rotate by the circular plate, thereby pushing the opening frame to slide toward the adjacent side, thereby pushing the hook plate to slide toward the adjacent side, thereby pushing the two adjustment plates to slide toward the adjacent side and fixing barrels of different sizes, preventing them from shifting during the filling process, thereby improving work efficiency.

[0025] 3. In the utility model, water is introduced through the water inlet pipe, and the water enters through the connecting ring. At the same time, the driving motor drives the rotating shaft to continue to rotate, the rotating shaft drives the rotating ring to rotate, and the rotating ring drives the nozzle to rotate. The nozzle flushes the inner wall of the filling barrel in the form of rotation, thereby automatically removing residual silicone oil and avoiding cross infection during the next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a three-dimensional diagram of the silicone oil filling mechanism proposed in the present utility model;

[0027] Figure 2 This is a structural diagram of the support ring of the silicone oil filling mechanism proposed in the present invention;

[0028] Figure 3 This is a structural diagram of the limit plate of the silicone oil filling mechanism proposed in the present invention;

[0029] Figure 4 This is a structural diagram of the opening frame of the silicone oil filling mechanism proposed in the present invention;

[0030] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0031] Figure 6 This is a structural schematic diagram of the connecting ring of the silicone oil filling mechanism proposed in the present invention.

[0032] Legend:

[0033] 1. Filling barrel; 2. Feed pipe; 3. Protective column; 4. Motor 1; 5. Rotating shaft; 6. Agitator; 7. Connecting plate; 8. Scraper; 9. Discharge pipe; 10. Support ring; 11. Rotating plate; 12. Connecting column; 13. Electric push rod; 14. I-shaped plate; 15. Rotating plate; 16. Opening plate; 17. Trapezoidal plate; 18. Limiting plate; 19. Support frame; 20. Connecting frame; 21. Conveyor belt; 22. Connecting box; 23. Motor 2; 24. Rotating shaft; 25. Circular plate; 26. Fixed column; 27. Opening frame; 28. Hook plate; 29. ​​Guide frame; 30. Adjusting plate; 31. Right-angle plate; 32. Cylinder; 33. Disc; 34. Water inlet pipe; 35. Connecting rod; 36. Connecting ring; 37. Rotating ring; 38. Sprinkler. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Reference Figures 1 to 3The present invention provides an embodiment of a silicone oil filling mechanism, comprising a filling barrel 1 and a support frame 19. The filling barrel 1 is used to store silicone oil, while the support frame 19 supports the installation of subsequent components. A feed pipe 2 is fixedly connected to the top left end of the filling barrel 1, through which the silicone oil is stored within the filling barrel 1. A protective column 3 is fixedly connected to the top side of the filling barrel 1 to protect the internal components. A drive assembly that drives the subsequent components is fixedly connected to the interior of the protective column 3. The drive assembly includes a motor 1 4. The exterior of the motor 1 4 is fixedly connected to the interior of the protective column 3. The protective column 3 and motor 1 4 are connected by welding, ensuring that the motor 1 4 can provide a stable driving source. The driving end of the motor 1 4 is fixedly connected to a rotating shaft 5, which transmits the rotational force of the motor 1 4 driving end to the subsequent components. A connecting plate 7 is fixedly connected to the exterior of the rotating shaft 5. The rotating shaft 5 and connecting plate 7 are connected by welding, ensuring that the rotating shaft 5 drives the connecting plate 7 to rotate. The far side of the connecting plate 7 is fixedly connected with a scraper 8, which is driven by the connecting plate 7 to rotate, thereby cleaning the inner wall of the filling barrel 1;

[0036] A plurality of stirring paddles 6 are fixedly connected to both the left and right sides of the rotating shaft 5, which are used to stir the silicone oil inside the filling barrel 1, thereby improving its uniformity. A discharge pipe 9 is fixedly connected to the bottom end of the filling barrel 1, which is used to pour out the silicone oil inside the filling barrel 1. A support ring 10 is fixedly connected to the outer wall of the discharge pipe 9. The discharge pipe 9 and the support ring 10 are connected by a welding process, so that the support ring 10 can provide support for the rotation of subsequent components. The external rotation of the support ring 10 is connected to a rotating plate 11. The support ring 10 limits the rotating plate 11 so that the rotating plate 11 can be suspended in the air, and then can rotate around the support ring 10 as the center of the circle after being subjected to force. A connecting column 12 is fixedly connected to the side of the drive assembly away from the protective column 3. The bottom side of the rotating shaft 5 is fixedly connected to the top side of the connecting column 12, and the connecting column 12 is driven to rotate by the rotating shaft 5. The top side of the inner wall of the connecting column 12 is fixedly connected to the electric push rod 13. The connecting column 12 and the electric push rod 13 are connected by welding, so that the electric push rod 13 can stably provide a driving source.

[0037] The driving end of the electric push rod 13 is fixedly connected to an I-shaped plate 14, and the thrust of the driving end of the electric push rod 13 is transmitted to subsequent components through the I-shaped plate 14. The two I-shaped plates 14 are rotatably connected to the rotating plate 15 at the far end, and the thrust is transmitted to the rotating plate 15 through the I-shaped plate 14, so that the rotating plate 15 can rotate. The two rotating plates 15 are rotatably connected to the far end of the two rotating plates 15, and the rotation of the rotating plate 15 drives the opening plates 16 to slide, so that the two opening plates 16 can slide relative to each other. The side of the opening plate 16 away from the connecting column 12 is fixedly connected to a trapezoidal plate 17, and the trapezoidal plate 17 is pushed to slide horizontally by the opening plate 16. The outer parts of the two trapezoidal plates 17 are respectively slidably connected to the inner wall of the far end of the rotating plate 11. The trapezoidal plates 17 are restricted and guided by the rotating plate 11, so that the trapezoidal plates 17 can slide horizontally left and right. The two trapezoidal plates 17 are fixedly connected to the far side of each other with a limit plate 18, which restricts the trapezoidal plates 17 and allows them to slide stably. The outer parts of the two limit plates 18 are slidably connected to the inner wall of the far end of the rotating plate 11, and the adjacent sides of the two trapezoidal plates 17 are in contact, which is used to clamp and prevent the silicone oil from falling.

[0038] Reference Figure 1 and Figure 4 The top side of support frame 19 is fixedly connected to connecting frame 20, which is connected to the connecting frame 20 by welding. A conveyor belt 21 is installed inside connecting frame 20 for transporting the oil tank. A connecting box 22 is fixedly connected to the right end of support frame 19 to protect the internal components. A power assembly that drives the subsequent components is fixedly connected inside connecting box 22. The power assembly includes motor 23. The exterior of motor 23 is fixedly connected to the interior of connecting box 22. Connecting box 22 and motor 23 are connected by welding, allowing motor 23 to provide a stable driving source. The driving end of motor 23 is fixedly connected to rotating shaft 24, which transmits the rotational force of the driving end of motor 23 to the subsequent components through rotating shaft 24. A circular plate 25 is fixedly connected to the top side of the power assembly. The top side of rotating shaft 24 is fixedly connected to the bottom side of circular plate 25. The rotating shaft 24 is subjected to force and drives circular plate 25 to rotate. A fixed post 26 is fixedly connected to the far end of the top side of the circular plate 25. The rotational force is transmitted to the fixed post 26 through the circular plate 25, so that the fixed post 26 can rotate around the center of the circular plate 25.

[0039] The outer portion of the fixed column 26 is slidably connected to an opening frame 27. When the fixed column 26 rotates under force, it pushes the opening frames 27 to slide. A hook plate 28 is fixedly connected to the far side of each opening frame 27, transmitting the sliding force to the hook plates 28 through the opening frames 27. The right end of the connecting frame 20 is fixedly connected to multiple guide frames 29, which are connected to the connecting frame 20 via welding. The outer portion of the hook plates 28 is slidably connected to the inner portion of the two guide frames 29, and the guide frames 29 constrain the guide frames 29 to ensure stable sliding. The adjacent sides of the two hook plates 28 are fixedly connected to an adjustment plate 30. These two adjustment plates 30, when pushed by the hook plates 28, can secure the oil filling drum and prevent it from shifting. Two right-angle plates 31 are fixedly connected to the rear side of the support frame 19. These right-angle plates 31 are welded together to provide stable support. A cylinder 32 is fixedly connected to the front end of one of the right-angled plates 31, near the support frame 19. The two plates are welded together, allowing the cylinder 32 to provide a stable driving source. The front end of the other right-angled plate 31 is fixedly connected to the rear side of the filling barrel 1. A disc 33 is fixedly connected to the driving end of the cylinder 32. The disc 33 transmits the thrust from the driving end of the cylinder 32 to push the cover plate and the filling barrel together, sealing them.

[0040] Reference Figure 2 and Figure 6 Two connecting rods 35 are fixedly connected to the top side of the inner wall of the filling barrel 1. The filling barrel 1 and the connecting rods 35 are connected by welding, so that the connecting rods 35 can provide support for subsequent components. The bottom sides of the two connecting rods 35 are fixedly connected to the top side of the rotating shaft 24, and a connecting ring 36 is fixedly connected to the bottom side of the circular plate 25. The connecting ring 36 is connected to the connecting rods 35 by welding, so that the connecting ring 36 can support subsequent components. The inside of the connecting ring 36 is fixedly connected to the water inlet pipe 34, which is used to introduce water to clean the inner wall of the filling barrel 1. The top of the driving assembly is fixedly connected to the rotating ring 37, and the top of the rotating shaft 5 is fixedly connected to the inner wall of the rotating ring 37, and the rotating ring 37 is driven to rotate by the rotating shaft 5. The outside of the connecting ring 36 is rotatably connected to the inner wall of the top of the rotating ring 37, and the connecting ring 36 provides a suspended state for the rotating ring 37. The four sides of the rotating ring 37 are fixedly connected with nozzles 38 so that the nozzles 38 can rotate to flush the inner wall of the filling barrel 1.

[0041] Working principle: Silicone oil enters the filling barrel 1 through the feed pipe 2, which is connected to the external silicone oil supply system. At this time, the drive motor 4 is started, the rotating shaft 5 rotates, and then drives the connecting plate 7 and the stirring paddle 6 to move. The stirring paddle 6 stirs the silicone oil entering the filling barrel 1 to keep the silicone oil in a uniform state in the barrel, avoiding the silicone oil from being stratified or uneven due to long-term storage, and ensuring the consistency of the silicone oil quality each time it is filled. At the same time, the scraper 8 scrapes the inner wall of the filling barrel 1 as the connecting plate 7 rotates to prevent the silicone oil from adhering to the barrel wall and keep the barrel wall clean. The empty oil filling container is transported to the center of the bottom of the filling barrel 1 by the conveyor belt 21, and then the conveyor belt 21 is stopped.

[0042] At this time, the electric push rod 13 is driven to push the I-shaped plate 14 to slide, and then the rotating plate 15 is pushed to rotate. The rotating plate 15 slides against the opening plate 16, and the opening plate 16 pushes the trapezoidal plate 17 to slide horizontally in the rotating plate 11. By adjusting the position of the trapezoidal plate 17 in the rotating plate 11, the opening size of the rotating plate 11 is changed, thereby controlling the outflow of silicone oil in the discharge pipe 9, and realizing the silicone oil filling operation of the oil filling container. When the two trapezoidal plates 17 are in contact, the residual silicone oil inside will slowly flow onto the trapezoidal plate 17, and then prevent dripping, and then there is no need to consume manpower to clean up the dripping silicone oil, thereby saving production costs.

[0043] After filling, conveyor belt 21 is restarted, transporting the barrels to the right. Once perpendicular to the center of disc 33, conveyor belt 21 is stopped and motor 23 is activated, driving rotating shaft 24. Rotating shaft 24 rotates circular plate 25, which in turn rotates fixing column 26. This forces opening frame 27 to slide toward the same side, which in turn forces hook plate 28 to slide toward the same side, which in turn forces two adjustment plates 30 to slide toward the same side and secure barrels of different sizes, preventing them from shifting during the filling process. Simultaneously, a lid for each barrel is placed on the barrel, and cylinder 32 is then activated, pushing disc 33 to engage and seal the oil barrel with the lid.

[0044] After the silicone oil filling is completed, water is introduced through the water inlet pipe 34 and enters through the connecting ring 36. At the same time, the driving motor 14 drives the rotating shaft 5 to continue to rotate, the rotating shaft 5 drives the rotating ring 37 to rotate, and the rotating ring 37 drives the spray head 38 to rotate. The spray head 38 rotates to rinse the inner wall of the filling barrel 1, removing the residual silicone oil and keeping the interior of the filling barrel 1 clean, ready for the next filling.

[0045] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A silicone oil filling mechanism, comprising a filling barrel (1) and a support frame (19), characterized in that: The left end of the top of the filling barrel (1) is fixedly connected to a feed pipe (2), the top side of the filling barrel (1) is fixedly connected to a protective column (3), the interior of the protective column (3) is fixedly connected to a drive assembly for driving subsequent components to rotate, the bottom end of the filling barrel (1) is fixedly connected to a discharge pipe (9), the outer side wall of the discharge pipe (9) is fixedly connected to a support ring (10), the outside of the support ring (10) is rotatably connected to a rotating plate (11), and the side of the drive assembly away from the protective column (3) is fixedly connected to a connecting column (12). The top side of the inner wall of the connecting column (12) is fixedly connected to an electric push rod (13), the driving end of the electric push rod (13) is fixedly connected to an I-shaped plate (14), the two I-shaped plates (14) are rotatably connected to a rotating plate (15) at their respective ends, the two rotating plates (15) are rotatably connected to an opening plate (16) at their respective ends, the opening plate (16) is fixedly connected to a trapezoidal plate (17) on a side away from the connecting column (12), and the two trapezoidal plates (17) are fixedly connected to a limiting plate (18) at their respective sides.

2. The silicone oil filling mechanism according to claim 1, characterized in that: The top side of the support frame (19) is fixedly connected to a connecting frame (20), a conveyor belt (21) is installed inside the connecting frame (20), the right end of the support frame (19) is fixedly connected to a connecting box (22), the inside of the connecting box (22) is fixedly connected to a power assembly for driving subsequent components to rotate, the top side of the power assembly is fixedly connected to a circular plate (25), the top side of the circular plate (25) is fixedly connected to a fixed column (26), the outside of the fixed column (26) is slidably connected to an opening frame (27), the two opening frames (27) are fixedly connected to the far side with a hook plate (28), the right end of the connecting frame (20) is fixedly connected to a plurality of guide frames (29), and the adjacent sides of the two hook plates (28) are fixedly connected to an adjustment plate (30).

3. The silicone oil filling mechanism according to claim 2, characterized in that: Two right-angle plates (31) are fixedly connected to the rear side of the support frame (19), wherein a cylinder (32) is fixedly connected to the front end of one of the right-angle plates (31) near the support frame (19), and a front end of the other right-angle plate (31) is fixedly connected to the rear side of the filling barrel (1). A disc (33) is fixedly connected to the driving end of the cylinder (32). Two connecting rods (35) are fixedly connected to the top side of the inner wall of the filling barrel (1), and a connecting ring (36) is fixedly connected to the bottom side of the two connecting rods (35). The interior of the connecting ring (36) is fixedly connected to a water inlet pipe (34). A rotating ring (37) is fixedly connected to the top of the driving assembly, and nozzles (38) are fixedly connected to all four sides of the rotating ring (37).

4. The silicone oil filling mechanism according to claim 3, characterized in that: The driving assembly includes a motor (4), the exterior of the motor (4) is fixedly connected to the interior of the protective column (3), the driving end of the motor (4) is fixedly connected to a rotating shaft (5), the exterior of the rotating shaft (5) is fixedly connected to a connecting plate (7), the far sides of the connecting plate (7) are fixedly connected to scrapers (8), the left and right sides of the rotating shaft (5) are fixedly connected to a plurality of stirring paddles (6), and the bottom side of the rotating shaft (5) is fixedly connected to the top side of the connecting column (12).

5. The silicone oil filling mechanism according to claim 1, characterized in that: The exteriors of the two trapezoidal plates (17) are respectively slidably connected to the inner wall of the far end of the rotating plate (11), and the exteriors of the two limiting plates (18) are respectively slidably connected to the inner wall of the far end of the rotating plate (11), and the adjacent sides of the two trapezoidal plates (17) are in contact.

6. The silicone oil filling mechanism according to claim 2, characterized in that: The power assembly includes a second motor (23), the exterior of the second motor (23) is fixedly connected to the interior of the connection box (22), and the driving end of the second motor (23) is fixedly connected to a rotating shaft (24).

7. The silicone oil filling mechanism according to claim 6, characterized in that: The top side of the rotating shaft (24) is fixedly connected to the bottom side of the circular plate (25), and the outside of the hook-shaped plate (28) is slidably connected to the inside of the two guide frames (29).

8. The silicone oil filling mechanism according to claim 4, characterized in that: The top end of the rotating shaft (5) is fixedly connected to the inner wall of the rotating ring (37), and the outer portion of the connecting ring (36) is rotatably connected to the inner wall of the top end of the rotating ring (37).

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