A surface treatment device for automobile lamp production

Abstract

This utility model discloses a surface treatment device for automotive lamp production, including a worktable and a support shell disposed at the center of its bottom. A rotating rod is rotatably connected to the center of the top of the worktable, and the rotating rod passes through the worktable and extends into the support shell, where it is rotatably connected. A first motor is fixedly connected to the bottom of the inner wall of the support shell, and the output shaft of the first motor is fixedly connected to the bottom of the rotating rod. An annular top plate is fixedly connected to the top of the rotating rod, and a rotating table for supporting the automotive lamp to be processed is fixedly connected to the top of the top plate. This device has the advantages of flexible nozzle position adjustment and good spraying effect on the surface of the automotive lamp. The nozzle position can be adjusted laterally according to the size of the automotive lamp, making it highly adaptable. Combined with the rotating table and multi-nozzle layout, it ensures the spraying quality.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive lamp surface treatment devices, specifically a surface treatment device for automotive lamp production. Background Technology

[0002] In the production process of automotive headlights, the surface treatment equipment is a key device to ensure that the headlights have excellent optical performance, weather resistance and appearance quality. Common surface treatment processes include painting, coating and polishing. Among them, the spraying equipment is one of the devices used in the production process of automotive headlights.

[0003] The spraying device atomizes the paint and sprays it onto the surface of the workpiece through the nozzle. However, the position of the nozzle in the existing spraying device is not convenient to adjust. Due to the different specifications of car headlights, it is difficult to ensure that all areas can get consistent paint coverage. When the nozzle position is not suitable for the current workpiece, it may lead to the overuse of paint in an attempt to make up for the insufficient coverage, resulting in material waste and adverse environmental impact. Utility Model Content

[0004] The purpose of this utility model is to provide a surface treatment device for automotive headlight production, which has the advantages of flexible nozzle position adjustment and good spraying effect on headlight surface. The nozzle position can be adjusted laterally according to the headlight size, making it highly adaptable. Combined with a rotary table and multi-nozzle layout, it ensures spraying quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a surface treatment device for automotive headlight production, comprising a workbench and a support shell disposed at the center of its bottom, wherein a rotating rod is rotatably connected to the center of the top of the workbench, and the rotating rod passes through the workbench and extends into the support shell, where it is rotatably connected.

[0006] A first motor is fixedly connected to the bottom of the inner wall of the support shell. The output shaft of the first motor is fixedly connected to the bottom of the rotating rod. An annular top plate is fixedly connected to the top of the rotating rod. A rotating table for carrying the car lamp to be processed is fixedly connected to the top of the top plate. At least four rectangular shells are fixedly connected in a circular array on one side of the circumferential surface of the rotating table. A fixed sleeve is slidably connected to the top of each of the four rectangular shells. The fixed sleeve moves from the circumference of the rotating table to its center. An L-shaped plate is provided on the top of each of the four fixed sleeves. The bottom of the L-shaped plate is slidably connected to the top of the fixed sleeve. A horizontally placed high-pressure nozzle is fixedly connected to one end of each of the four L-shaped plates that is close to each other.

[0007] As a preferred embodiment of the surface treatment device for automotive headlight production according to this utility model, a controller is fixedly connected to the front surface of the support shell, and corrugated pipes are fixedly connected to the four high-pressure nozzles at one end away from each other. A liquid storage tank is fixedly sleeved on the surface of the rotating rod, and the liquid storage tank is located below the top plate. Vertically arranged electric push rods are fixedly connected to the bottom of the inner walls of the four fixed sleeves.

[0008] In a preferred embodiment of the surface treatment device for automotive headlight production according to this utility model, the movable end of the electric push rod is fixedly connected to the bottom of the L-shaped plate, and at least four positioning shells are fixedly connected in a circumferential array below the surface of the liquid storage tank. A liquid pump is fixedly connected to the bottom of the inner wall of each of the four positioning shells, and the four corrugated pipes extend from the end away from the high-pressure nozzle into the interior of the positioning shell and are fixedly connected to the liquid outlet end of the liquid pump.

[0009] In a preferred embodiment of the surface treatment device for automotive headlight production according to this utility model, the surface of the corrugated pipe is slidably connected to the top of the positioning shell, and injection pipes are fixedly connected to both the left and right sides of the top of the liquid storage tank. The four liquid pumps are all fixedly connected to liquid pumping ends with liquid pumping pipes. The end of the liquid pumping pipe away from the liquid pump extends into the interior of the liquid storage tank and is fixedly connected thereto.

[0010] As a preferred embodiment of the surface treatment device for automotive headlight production according to this utility model, a bevel gear ring is rotatably connected to the bottom of the inner wall of the rotary table, and at least four driven bevel gears are meshed in a circumferential array at the top of the bevel gear ring. A horizontally arranged threaded rod is fixedly connected to the inner wall of each of the four driven bevel gears. The end of the threaded rod away from the driven bevel gear extends into the interior of the rectangular shell and is rotatably connected to one side of its inner wall. A connecting rod is fixedly connected to the bottom of each of the four fixed sleeves.

[0011] As a preferred embodiment of the surface treatment device for automotive headlight production according to this utility model, the top of the bevel ring is meshed with a power bevel gear, the top of each of the four rectangular shells is provided with a horizontally arranged guide groove, the bottom of the connecting rod extends into the interior of the rectangular shell and is slidably connected to the inner wall of the guide groove, the threaded rod is threadedly connected to a threaded sleeve on the surface of the rectangular shell, and a guide rod is fixedly connected between the circumferential surface of the rotary table and one side of the inner wall of the rectangular shell.

[0012] In a preferred embodiment of the surface treatment device for automotive headlight production according to this utility model, a second motor is fixedly connected to the circumferential surface of the rotary table, the output shaft of the second motor extends into the interior of the rotary table and is fixedly connected to the inner wall of the power bevel gear, the threaded rod and the guide rod are arranged in parallel, the threaded sleeve and the guide rod are slidably connected, and the bottom of the connecting rod and the top of the threaded sleeve are fixedly connected.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model places the car light workpiece to be painted on a rotating table. The second motor starts, driving the power bevel gear to rotate. The power bevel gear drives the bevel gear ring to rotate. The bevel gear ring drives multiple driven bevel gears to rotate synchronously. Each driven bevel gear drives the corresponding threaded rod to rotate. When the threaded rod rotates, the threaded sleeve moves horizontally. The connecting rod moves with the threaded sleeve and, through the limiting effect of the guide groove, drives the fixed sleeve to slide at the top of the rectangular shell. The fixed sleeve drives the L-shaped plate and the high-pressure nozzle to move closer to or away from the center of the rotating table, completing the lateral position adjustment of the high-pressure nozzle. According to the height requirements of the workpiece, the controller controls the electric push rod to move. The electric push rod pushes or pulls back the L-shaped plate, causing it to move up and down, thereby adjusting the height of the high-pressure nozzle and achieving precise painting of car lights of different heights.

[0015] 2. This utility model starts the liquid pump through the controller. The paint is drawn from the storage tank through the liquid extraction pipe. After being pressurized by the liquid pump, it is delivered to the corrugated pipe. The corrugated pipe delivers the paint to the high-pressure nozzle for atomized spraying. The corrugated pipe has extensibility and flexibility to adapt to the displacement changes of the high-pressure nozzle during the horizontal and vertical adjustment process. The first motor starts and drives the rotating rod to rotate. The rotating rod drives the top plate and the rotating table to rotate. The car light workpiece on the rotating table rotates accordingly. Multiple high-pressure nozzles spray synchronously around the car light to ensure that the coating is uniform and without dead corners, maintaining the best spraying effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional drawing of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the rectangular shell structure of this utility model.

[0019] In the diagram: 1. Workbench; 2. Support shell; 3. Rotating rod; 4. First motor; 5. Top plate; 6. Rotary table; 7. Rectangular shell; 701. Guide groove; 8. Fixing sleeve; 9. Electric push rod; 10. L-shaped plate; 11. High-pressure nozzle; 12. Corrugated pipe; 13. Liquid storage tank; 14. Injection pipe; 15. Positioning shell; 16. Liquid pump; 17. Liquid extraction pipe; 18. Bevel gear ring; 19. Driven bevel gear; 20. Power bevel gear; 21. Second motor; 22. Threaded rod; 23. Threaded sleeve; 24. Guide rod; 25. Connecting rod; 26. Controller. Detailed Implementation

[0020] Please see Figures 1-3A surface treatment apparatus for automotive headlight production includes a worktable 1 and a support shell 2 disposed at the center of its bottom. A rotating rod 3 is rotatably connected to the center of the top of the worktable 1. The rotating rod 3 passes through the worktable 1 and extends into the support shell 2, where it is rotatably connected.

[0021] Furthermore, a first motor 4 is fixedly connected to the bottom of the inner wall of the support shell 2. The output shaft of the first motor 4 is fixedly connected to the bottom of the rotating rod 3. An annular top plate 5 is fixedly connected to the top of the rotating rod 3. A rotating table 6 for carrying the car lamp to be processed is fixedly connected to the top of the top plate 5. At least four rectangular shells 7 are fixedly connected in a circular array on one side of the circumferential surface of the rotating table 6. A fixed sleeve 8 is slidably connected to the top of each of the four rectangular shells 7. The fixed sleeve 8 moves from the circumference of the rotating table 6 to its center. An L-shaped plate 10 is provided on the top of each of the four fixed sleeves 8. The bottom of the L-shaped plate 10 is slidably connected to the top of the fixed sleeve 8. A horizontally placed high-pressure nozzle 11 is fixedly connected to one end of each of the four L-shaped plates 10 that is close to each other.

[0022] The workbench 1 serves as the basic platform for the entire device, supporting the upper components. The support shell 2 is fixed at the center of the bottom of the workbench 1 and contains a first motor 4. A rotating rod 3 passes through the workbench 1 and connects to the top plate 5, enabling rotation. The first motor 4 is installed at the bottom of the support shell 2 and drives the rotating rod 3 to rotate the top plate 5 and the rotating table 6. The top plate 5 is a ring structure, fixedly connected to the top of the rotating rod 3, and is used to support the rotating table 6. The rotating table 6 is fixed on the top plate 5 and is used to place the automotive lamp workpiece to be processed, rotating with it. Rectangular shells 7 are evenly distributed on the circumference of the rotating table 6, with at least four. Each rectangular shell 7 has a sliding fixing sleeve 8 on its top. The fixing sleeve 8 can slide along the top of the rectangular shell 7, moving from the circumference of the rotating table 6 towards its center or away. An L-shaped plate 10 is fixed to the top of the fixing sleeve 8, forming a sliding connection with it, and can be freely adjusted within a certain range. A high-pressure nozzle 11 is horizontally set at one end of the L-shaped plate 10 near the rotating table 6, used for high-precision spraying of the automotive lamp.

[0023] When different sizes of car lights need to be sprayed, the position of the L-shaped plate 10 can be adjusted by controlling the fixed sleeve 8 to slide along the rectangular shell 7, thereby changing the distance between the high-pressure nozzle 11 and the car light. This design allows the high-pressure nozzle 11 to flexibly adapt to car lights of various diameters or shapes, ensuring uniform spraying without dead corners. The first motor 4 drives the rotating rod 3 to rotate, which in turn drives the rotating table 6 and the car lights on it to rotate. While the car lights are rotating, multiple high-pressure nozzles 11 work synchronously around the car lights to achieve all-round and continuous spraying. With the rotation and displacement adjustment of the high-pressure nozzle 11, the consistency of coating thickness and coverage integrity can be effectively improved.

[0024] Furthermore, a controller 26 is fixedly connected to the front surface of the support shell 2, and four high-pressure nozzles 11 are fixedly connected to corrugated pipes 12 at opposite ends. A liquid storage tank 13 is fixedly sleeved on the surface of the rotating rod 3, and the liquid storage tank 13 is located below the top plate 5. Vertically set electric push rods 9 are fixedly connected to the bottom of the inner walls of the four fixed sleeves 8.

[0025] The controller 26 is fixedly connected to the front surface of the support shell 2, serving as the operation control center of the entire device. One end of the bellows 12 is fixedly connected to the end of the high-pressure nozzle 11 away from the L-shaped plate 10, and the other end extends into the positioning shell 15 and is connected to the liquid outlet of the liquid pump 16. The bellows structure has good extensibility and flexibility, which can adapt to the displacement changes of the high-pressure nozzle 11 as it moves with the L-shaped plate 10, ensuring stable and continuous liquid supply.

[0026] Furthermore, the movable end of the electric push rod 9 is fixedly connected to the bottom of the L-shaped plate 10, and at least four positioning shells 15 are fixedly connected in a circumferential array below the surface of the liquid storage tank 13. The bottom of the inner wall of each of the four positioning shells 15 is fixedly connected to a liquid pump 16, and the end of each of the four corrugated pipes 12 away from the high-pressure nozzle 11 extends into the interior of the positioning shell 15 and is fixedly connected to the liquid outlet end of the liquid pump 16.

[0027] The liquid storage tank 13 is fitted onto the surface of the rotating rod 3 and located below the top plate 5. It is used to store the paint required for spraying. The electric push rod 9 is fixedly installed at the bottom of the inner wall of the fixed sleeve 8. Its movable end is connected to the bottom of the L-shaped plate 10. Through the lifting action, the L-shaped plate 10 is moved up and down to realize the height adjustment function of the high-pressure nozzle 11 to adapt to the different height specifications of the vehicle lamp workpieces. The positioning shell 15 is installed below the liquid storage tank 13 and is distributed in a circumferential array. The liquid pump 16 is installed at the bottom of each positioning shell 15. Its liquid outlet is connected to the corresponding corrugated pipe 12. The liquid pump 16 can be started according to the command of the controller 26 to transport the paint in the liquid storage tank 13 to the corresponding high-pressure nozzle 11 for spraying.

[0028] Furthermore, the surface of the corrugated pipe 12 is slidably connected to the top of the positioning shell 15, and the top left and right sides of the liquid storage tank 13 are fixedly connected to the injection pipes 14. The liquid pumps 16 are all fixedly connected to the liquid pumping ends with the liquid pumping pipes 17. The end of the liquid pumping pipe 17 away from the liquid pump 16 extends into the interior of the liquid storage tank 13 and is fixedly connected to it.

[0029] The top left and right sides of the liquid storage tank 13 are each equipped with a liquid injection pipe 14. The liquid injection pipe 14 is used to replenish the paint inside the liquid storage tank 13, which is convenient for operators to add materials regularly or change the type of paint. Each liquid pump 16 is connected to a liquid extraction pipe 17 at the extraction end. The end of the liquid extraction pipe 17 away from the liquid pump 16 extends into the liquid storage tank 13 and is fixedly connected to it. All liquid extraction pipes 17 are evenly distributed inside the liquid storage tank 13 to ensure balanced liquid flow during the extraction process. The liquid pump 16 is started according to the instruction of the controller 26, which draws the paint in the liquid storage tank 13 through the liquid extraction pipe 17 and delivers it to the corresponding high-pressure nozzle 11 for spraying operation through the corrugated pipe 12.

[0030] Furthermore, a bevel gear ring 18 is rotatably connected to the bottom of the inner wall of the rotary table 6. At least four driven bevel gears 19 are meshed in a circumferential array at the top of the bevel gear ring 18. A horizontally arranged threaded rod 22 is fixedly connected to the inner wall of each of the four driven bevel gears 19. The end of the threaded rod 22 away from the driven bevel gear 19 extends into the interior of the rectangular shell 7 and is rotatably connected to one side of its inner wall. A connecting rod 25 is fixedly connected to the bottom of each of the four fixed sleeves 8.

[0031] Furthermore, the top of the bevel ring 18 is meshed with a power bevel gear 20, and the top of each of the four rectangular shells 7 is provided with a horizontally arranged guide groove 701. The bottom of the connecting rod 25 extends into the interior of the rectangular shell 7 and is slidably connected to the inner wall of the guide groove 701. The threaded rod 22 is threadedly connected to the surface of the rectangular shell 7 with a threaded sleeve 23. The circumferential surface of the rotary table 6 is fixedly connected to one side of the inner wall of the rectangular shell 7 with a guide rod 24.

[0032] The power bevel gear 20 is located inside the rotary table 6 and meshes with the top of the bevel gear ring 18, serving as a drive source to provide power to the entire device. A horizontally arranged guide groove 701 is provided on the top of each rectangular shell 7 to guide the sliding direction of the connecting rod 25 and ensure that it can move smoothly. The threaded rod 22 passes through the threaded sleeve 23 and is threadedly connected to its surface, enabling it to move along its length when the threaded rod 22 rotates.

[0033] Furthermore, a second motor 21 is fixedly connected to the circumferential surface of the rotary table 6. The output shaft of the second motor 21 extends into the interior of the rotary table 6 and is fixedly connected to the inner wall of the power bevel gear 20. The threaded rod 22 and the guide rod 24 are arranged in parallel. The threaded sleeve 23 is slidably connected to the guide rod 24. The bottom of the connecting rod 25 is fixedly connected to the top of the threaded sleeve 23.

[0034] After the second motor 21 starts, it drives the power bevel gear 20 to rotate. The power bevel gear 20 transmits the rotational motion to the bevel gear ring 18 through meshing with the top of the bevel gear ring 18. The bevel gear ring 18 then drives the driven bevel gear 19 to rotate synchronously, which eventually causes all the threaded rods 22 to start rotating. When the threaded rods 22 rotate, the threaded sleeve 23 moves linearly along the direction of the threaded rods 22. The bottom of the connecting rod 25 is fixedly connected to the top of the threaded sleeve 23, and the connecting rod 25 is also slidably connected to the inner wall of the guide groove 701, ensuring that it can only move horizontally along the direction of the guide groove 701. When the threaded sleeve 23 moves along the threaded rod 22, it will pull or push the fixed sleeve 8 through the connecting rod 25 to achieve precise adjustment of the position of the high-pressure nozzle 11. The guide rod 24 not only provides the necessary support for the threaded sleeve 23, but also restricts all other forms of movement except along the guide direction, which greatly improves the stability and accuracy of the device.

[0035] The operator places the headlight workpiece to be painted on the rotary table 6. The second motor 21 starts, driving the power bevel gear 20 to rotate. The power bevel gear 20 drives the bevel gear ring 18 to rotate. The bevel gear ring 18 drives multiple driven bevel gears 19 to rotate synchronously. Each driven bevel gear 19 drives the corresponding threaded rod 22 to rotate. When the threaded rod 22 rotates, the threaded sleeve 23 moves horizontally. The connecting rod 25 moves with the threaded sleeve 23 and, through the limiting action of the guide groove 701, drives the fixed sleeve 8 to slide at the top of the rectangular shell 7. The fixed sleeve 8 drives the L-shaped plate 10 and the high-pressure nozzle 11 to move closer to or away from the center of the rotary table 6, completing the lateral position adjustment of the high-pressure nozzle 11. According to the workpiece height requirements, the controller 26 controls the electric push rod 9 to move. The electric push rod 9 pushes or pulls back the L-shaped plate 10, causing it to move up and down, thereby adjusting the height of the high-pressure nozzle 11 and achieving precise painting of headlights of different heights.

[0036] The liquid pump 16 is started by the controller 26. The paint is drawn from the storage tank 13 through the liquid extraction pipe 17. After being pressurized by the liquid pump 16, it is delivered to the corrugated pipe 12. The corrugated pipe 12 delivers the paint to the high-pressure nozzle 11 for atomized spraying. The corrugated pipe 12 has extensibility and flexibility to adapt to the displacement changes of the high-pressure nozzle 11 during the horizontal and vertical adjustment process. The first motor 4 is started, driving the rotating rod 3 to rotate. The rotating rod 3 drives the top plate 5 and the rotating table 6 to rotate. The car light workpiece on the rotating table 6 rotates accordingly. Multiple high-pressure nozzles 11 spray synchronously around the car light to ensure that the coating is uniform and without dead corners, maintaining the best spraying effect.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 surface treatment apparatus for automotive headlight production, comprising a workbench (1) and a support shell (2) disposed at the center of its bottom, wherein a rotating rod (3) is rotatably connected to the center of the top of the workbench (1), and the rotating rod (3) passes through the workbench (1) and extends into the support shell (2) and is rotatably connected thereto, characterized in that: The bottom of the inner wall of the support shell (2) is fixedly connected to a first motor (4). The output shaft of the first motor (4) is fixedly connected to the bottom of the rotating rod (3). The top of the rotating rod (3) is fixedly connected to an annular top plate (5). The top of the top plate (5) is fixedly connected to a rotating table (6) that carries the car lamp to be processed. At least four rectangular shells (7) are fixedly connected in a circular array on one side of the circumferential surface of the rotating table (6). The top of each of the four rectangular shells (7) is slidably connected to a fixed sleeve (8). The fixed sleeve (8) moves from the circumference of the rotating table (6) to its center. The top of each of the four fixed sleeves (8) is provided with an L-shaped plate (10). The bottom of the L-shaped plate (10) is slidably connected to the top of the fixed sleeve (8). Each of the four L-shaped plates (10) is fixedly connected to a horizontally placed high-pressure nozzle (11) at one end close to each other.

2. The surface treatment apparatus for automotive lamp production as described in claim 1, characterized in that: A controller (26) is fixedly connected to the front surface of the support shell (2). The four high-pressure nozzles (11) are all fixedly connected to a corrugated pipe (12) at one end away from each other. A liquid storage tank (13) is fixedly sleeved on the surface of the rotating rod (3). The liquid storage tank (13) is located below the top plate (5). A vertically set electric push rod (9) is fixedly connected to the bottom of the inner wall of the four fixed sleeves (8).

3. The surface treatment apparatus for automotive lamp production as described in claim 2, characterized in that: The movable end of the electric push rod (9) is fixedly connected to the bottom of the L-shaped plate (10). At least four positioning shells (15) are fixedly connected in a circular array below the surface of the liquid storage tank (13). A liquid pump (16) is fixedly connected to the bottom of the inner wall of each of the four positioning shells (15). The four corrugated pipes (12) extend from the end away from the high-pressure nozzle (11) into the interior of the positioning shell (15) and are fixedly connected to the liquid outlet end of the liquid pump (16).

4. The surface treatment apparatus for automotive lamp production as described in claim 3, characterized in that: The surface of the corrugated pipe (12) is slidably connected to the top of the positioning shell (15). The top left and right sides of the liquid storage tank (13) are fixedly connected to the injection pipe (14). The four liquid pumps (16) are fixedly connected to the liquid pumping ends with the liquid pumping pipe (17). The end of the liquid pumping pipe (17) away from the liquid pump (16) extends into the interior of the liquid storage tank (13) and is fixedly connected to it.

5. The surface treatment apparatus for automotive lamp production as described in claim 1, characterized in that: The bottom of the inner wall of the rotating platform (6) is rotatably connected to a bevel gear ring (18). The top of the bevel gear ring (18) is circumferentially arrayed and meshed with at least four driven bevel gears (19). The inner walls of the four driven bevel gears (19) are all fixedly connected with horizontally arranged threaded rods (22). The end of the threaded rod (22) away from the driven bevel gear (19) extends into the interior of the rectangular shell (7) and is rotatably connected to one side of its inner wall. The bottom of the four fixed sleeves (8) is fixedly connected with connecting rods (25).

6. The surface treatment apparatus for automotive lamp production as described in claim 5, characterized in that: The top of the bevel ring (18) is meshed with a power bevel gear (20). The top of each of the four rectangular shells (7) is provided with a horizontally arranged guide groove (701). The bottom of the connecting rod (25) extends into the interior of the rectangular shell (7) and is slidably connected to the inner wall of the guide groove (701). The threaded rod (22) is threadedly connected to a threaded sleeve (23) on the surface of the rectangular shell (7). A guide rod (24) is fixedly connected between the circumferential surface of the rotary table (6) and one side of the inner wall of the rectangular shell (7).

7. The surface treatment apparatus for automotive lamp production as described in claim 6, characterized in that: A second motor (21) is fixedly connected to the circumferential surface of the rotary table (6). The output shaft of the second motor (21) extends into the interior of the rotary table (6) and is fixedly connected to the inner wall of the power bevel gear (20). The threaded rod (22) is arranged parallel to the guide rod (24). The threaded sleeve (23) is slidably connected to the guide rod (24). The bottom of the connecting rod (25) is fixedly connected to the top of the threaded sleeve (23).

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