A lampshade tightening device

Abstract

This utility model discloses a lampshade tightening device, belonging to the field of light string manufacturing technology. The lampshade tightening device includes a base assembly, a lifting assembly, a drive assembly, and a clamping assembly. The lifting assembly is disposed on the top surface of the base assembly, the drive assembly is disposed on the lifting assembly, and the clamping assembly is disposed on the bottom surface of the drive assembly. The drive assembly includes a clutch box, and a first rotating shaft, a second rotating shaft, and a third rotating shaft are sequentially rotatably connected to the bottom surface of the clutch box. Gears are fitted on the outside of each of the first, second, and third rotating shafts, and adjacent pairs of gears mesh with each other. A lifting groove is formed inside the first rotating shaft, and a counterweight is disposed inside the lifting groove. A first electromagnet is rotatably connected to the top surface of the clutch box, directly above the counterweight, and the counterweight is magnetically connected to the first electromagnet. The base assembly includes a worktable, and a torque meter is installed at the bottom of the worktable. A base fixture is installed at the detection end of the torque meter.

Description

Technical Field

[0001] This utility model relates to the field of light string production technology, specifically a lampshade tightening device. Background Technology

[0002] A string of lights consists of light-emitting units, wires and connectors, lamp holders, and lamp shades. The light-emitting units are typically bulbs or LED chips, providing the light source; the wires and connectors connect the individual light-emitting units, transmitting electrical energy; the lamp holders, usually with external threads, hold the base of the light-emitting units in place for mounting the lamp shades; the lamp shades are protective or decorative components that cover the light-emitting units, and are often made of plastic, glass, or metal, serving to protect against dust and impacts, soften the light, and enhance the appearance. In the string of lights production process, the tightening process between the lamp shades and the string is a crucial step in ensuring product quality.

[0003] Based on the above, the inventors have discovered the following problems: Currently, the tightening of lampshades mostly relies on manual operation or simple mechanical devices. The core process involves manually pre-fitting the lampshade onto the lamp string base and tightening it by hand rotation or with the help of tools such as wrenches. Manual tightening depends on the operator's experience, resulting in large fluctuations in force. Some lampshades are tightened too loosely, causing them to fall off during transportation, while others are tightened too tightly, causing them to crack. It is impossible to guarantee that the tightening degree of each product is consistent.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a lampshade tightening device in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of this utility model is to provide a lampshade tightening device to solve the problems mentioned in the background art.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] A lampshade tightening device includes a base assembly, a lifting assembly, a drive assembly, and a clamping assembly. The lifting assembly is disposed on the top surface of the base assembly, the drive assembly is disposed on the lifting assembly, and the clamping assembly is disposed on the bottom surface of the drive assembly. The drive assembly includes a clutch box, and a first rotating shaft, a second rotating shaft, and a third rotating shaft are rotatably connected to the bottom surface of the clutch box in sequence. Gears are fitted on the outside of the first rotating shaft, and adjacent pairs of gears mesh with each other. A lifting groove is formed inside the first rotating shaft, and a counterweight is provided inside the lifting groove. A first electromagnet is rotatably connected to the top surface of the clutch box directly above the counterweight, and the counterweight is magnetically connected to the first electromagnet. The base assembly includes a worktable, and a torque meter is installed at the bottom of the worktable. A base fixture is installed at the detection end of the torque meter.

[0008] Furthermore, the counterweight bar has a regular hexagonal cross-section, the outer wall of the counterweight bar slides in conjunction with the inner wall of the lifting groove, and the counterweight bar is made of magnetic material.

[0009] The beneficial effect of adopting the above-mentioned further solution is that, since the cross-section of the counterweight bar is a regular hexagon and the counterweight bar slides with the first rotating shaft through the lifting groove, the rotational freedom of the counterweight bar is restricted, allowing only axial lifting. This ensures that when the electromagnet rotates, the counterweight bar achieves precise axial position adjustment by magnetic attraction. When tightening is required, the first electromagnet is energized, the counterweight bar is attracted and magnetically connected to the first electromagnet. When the first servo motor drives the first electromagnet to rotate, the counterweight bar and the first rotating shaft follow the rotation, and the clamping component is finally rotated under the meshing action of adjacent gears. When the torque reaches the threshold, the first electromagnet is de-energized, the counterweight bar separates from the electromagnet under the action of gravity and continuously moves down along the lifting groove to retract into the first rotating shaft. At this time, the first servo motor drives the first electromagnet to idle and cannot transmit power, thereby realizing clutch transmission.

[0010] Furthermore, the third rotating shaft has a movable groove inside, and a movable rod is rotatably connected inside the movable groove. A counterweight rod and a plug rod are respectively installed on the top and bottom surfaces of the movable rod. A second electromagnet is rotatably connected to the top surface of the clutch box directly above the counterweight rod. The counterweight rod is made of magnetic material, and the second electromagnet is magnetically connected to the counterweight rod.

[0011] The beneficial effect of adopting the above-mentioned further solution is that, since the cross-section of the moving rod is gear-shaped and the moving rod slides into the moving groove of the third rotating shaft through the moving groove, the rotation of the moving rod is restricted, and only its axial lifting and lowering is allowed. This ensures that when the second electromagnet rotates, the moving rod follows the magnetic attraction to achieve precise extension and retraction of the insertion rod. When the second electromagnet is energized, it attracts the counterweight rod. Since the insertion rod and the worm gear are connected by the internal hexagonal slot, power is transmitted when the second servo motor is working. The rotational power of the third rotating shaft drives the clamping seat to clamp the lamp cover through the insertion rod, worm gear, worm wheel, and bidirectional lead screw.

[0012] Furthermore, a first servo motor and a second servo motor are respectively installed on both sides of the top surface of the clutch box. The output end of the first servo motor is fixedly connected to the end of the first electromagnet away from the counterweight bar, and the output end of the second servo motor is fixedly connected to the end of the second electromagnet away from the counterweight bar.

[0013] The beneficial effects of adopting the above-mentioned further solution are that, through the setting of the first servo motor, when it is working, the rotation of the clamping component can be realized under the cooperation of the first electromagnet, the counterweight bar, the first rotating shaft, the second rotating shaft, the third rotating shaft, and their external gears; through the setting of the second servo motor, when it is working, the clamping operation of the clamping component can be realized under the cooperation of the second electromagnet, the counterweight bar, the third rotating shaft, the second rotating shaft, the first rotating shaft, and their external gears; the first and second servo motors do not have internal brakes and are not braked. When the first servo motor is driven, the output shaft of the first servo motor can overcome electromagnetic damping and mechanical friction and drive the output shaft of the second servo motor to rotate under the mechanical linkage of gear meshing. Conversely, when the second servo motor is driven, the driving state is the same as that of the first servo motor.

[0014] Furthermore, the clamping assembly includes a connecting frame disposed on the bottom surface of the clutch box. The top surface of the connecting frame is fixedly connected to the bottom surface of the third rotating shaft. An installation cavity is provided inside the connecting frame. Sliding grooves are provided on both sides of the installation cavity inside the connecting frame. Sliding blocks are slidably connected inside the two sliding grooves. The sliding blocks are T-shaped. A bidirectional lead screw is threaded between a pair of sliding blocks. The outer wall of the bidirectional lead screw is rotatably connected to the inner wall of the connecting frame. A clamping seat is installed on the outer wall of a pair of sliding blocks near the bottom end.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the third rotating shaft is fixedly connected to the connecting frame, and when the third rotating shaft rotates, it drives the clamping assembly to rotate as a whole; through the setting of the bidirectional lead screw, when the bidirectional lead screw rotates, the two slide blocks at the opposite threads on the outside of the bidirectional lead screw achieve linear movement under the sliding connection of the slide groove, thereby realizing the operation of clamping or releasing the lamp cover.

[0016] Furthermore, the bidirectional lead screw has a worm gear fitted on the outside of the mounting cavity, and a worm is rotatably connected inside the mounting cavity. The worm and the worm gear mesh with each other. Both ends of the worm extend through the mounting cavity to the outside. The top surface of the worm has an internal hexagonal groove, which is inserted into one end of the insertion rod.

[0017] The beneficial effect of adopting the above-mentioned further solution is that, through the cooperative use of the worm gear and worm, based on the self-locking characteristics of the worm gear transmission, when the worm is the driving member, the worm gear cannot drive the worm in the reverse direction, ensuring the stability of the tightening process; since the insert rod and the internal hexagonal slot are inserted, when the counterweight rod is attracted to the second electromagnet and the second servo motor drives the second electromagnet to rotate, the moving rod rotates in the moving slot, so that the insert rod rotates and drives the worm to rotate.

[0018] Furthermore, the lifting assembly includes a top plate, and a lifting plate is provided below the top plate. Smooth rods are slidably connected to the four corners inside the lifting plate. The two ends of the smooth rods are fixedly connected to the top surface of the workbench and the bottom surface of the top plate, respectively. A notch is provided on the lifting plate, and a clutch box is disposed in the notch. The outer wall of the clutch box is fixedly connected to the inner wall of the notch. A linear bearing is installed on the top surface of the workbench, and a bearing seat is slidably connected to the outside of the linear bearing. The top surface of the bearing seat is fixedly connected to the bottom surface of the lifting plate.

[0019] The beneficial effect of adopting the above-mentioned further solution is that, through the cooperation of linear bearings and bearing housings, when the linear bearing drives the bearing housing to move up or down, the lifting plate moves stably up or down on the smooth rod.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: The lampshade tightening device uses a torque meter to directly detect the tightening torque borne by the base fixture and provides real-time feedback on the mechanical data of the tightening process. If the torque exceeds the standard, the clutch protection is immediately triggered to ensure that the tightening torque of each lampshade is consistent, thus solving the problems of uneven torque and low yield rate in manual tightening. When tightening is required, the first electromagnet is energized, and the counterweight is attracted and magnetically connected to the first electromagnet. When the first servo motor drives the first electromagnet to rotate, the counterweight and the first rotating shaft follow the rotation, and the clamping component is finally rotated under the meshing action of adjacent gears. When the torque reaches the threshold, the first electromagnet is de-energized, and the counterweight separates from the electromagnet under the action of gravity and moves down along the lifting groove to retract into the first rotating shaft. At this time, the first servo motor drives the first electromagnet to rotate idly and cannot transmit power, thereby realizing clutch transmission. Attached Figure Description

[0021] Figure 1 A three-dimensional structural diagram of a lampshade tightening device provided by this utility model;

[0022] Figure 2 An exploded three-dimensional structural diagram of the base assembly of a lampshade tightening device provided by this utility model;

[0023] Figure 3 A three-dimensional structural diagram of the driving assembly and clamping assembly of a lampshade tightening device provided by this utility model;

[0024] Figure 4 An exploded three-dimensional structural diagram of the drive assembly of a lampshade tightening device provided by this utility model;

[0025] Figure 5 A front cross-sectional view of the clamping assembly of a lampshade tightening device provided by this utility model.

[0026] In the diagram: 1. Base assembly; 11. Workbench; 12. Torque meter; 13. Base fixture; 2. Lifting assembly; 21. Top plate; 22. Lifting plate; 23. Smooth rod; 24. Linear bearing; 3. Drive assembly; 31. Clutch box; 32. First rotating shaft; 33. Second rotating shaft; 34. Third rotating shaft; 35. Gear; 36. Counterweight bar; 37. First electromagnet; 38. Moving rod; 39. Counterweight rod; 310. Second electromagnet; 311. Insert rod; 312. First servo motor; 313. Second servo motor; 4. Clamping assembly; 41. Connecting frame; 42. Slide groove; 43. Slide seat; 44. Clamping seat; 45. Bidirectional lead screw; 46. Worm gear; 47. Worm. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5This utility model provides a technical solution: a lampshade tightening device, including a base assembly 1, a lifting assembly 2, a driving assembly 3, and a clamping assembly 4. The lifting assembly 2 is disposed on the top surface of the base assembly 1, the driving assembly 3 is disposed on the lifting assembly 2, and the clamping assembly 4 is disposed on the bottom surface of the driving assembly 3. The driving assembly 3 includes a clutch box 31, and the bottom surface of the clutch box 31 is sequentially rotatably connected to a first rotating shaft 32, a second rotating shaft 33, and a third rotating shaft 34. Gears 35 are fitted onto the exterior of shafts 34, with adjacent pairs of gears 35 meshing with each other. A lifting groove is provided inside the first rotating shaft 32, and a counterweight bar 36 is installed inside the lifting groove. A first electromagnet 37 is rotatably connected to the top surface of the clutch box 31, directly above the counterweight bar 36. The counterweight bar 36 and the first electromagnet 37 are magnetically connected. The base assembly 1 includes a worktable 11, with a torque meter 12 installed at the bottom of the worktable 11. A base fixture 13 is installed at the detection end of the torque meter 12. The counterweight 36 has a regular hexagonal cross-section, and its outer wall slides against the inner wall of the lifting groove. The counterweight 36 is made of magnetic material. The torque meter 12 directly detects the tightening torque borne by the base fixture 13 and provides real-time feedback on the mechanical data of the tightening process. If the torque exceeds the limit, the clutch protection is immediately triggered to ensure that the tightening torque of each lampshade is consistent, solving the problems of uneven manual tightening torque and low yield. When tightening is required, the first electromagnet 37 is energized, and the counterweight 36 is attracted and magnetically attracted to the first electromagnet 37. When the first servo motor 312 drives the first electromagnet 37 to rotate, the counterweight bar 36 and the first rotating shaft 32 follow the rotation, and the clamping assembly 4 is finally rotated under the meshing action of the adjacent gears 35. When the torque reaches the threshold, the first electromagnet 37 is de-energized, and the counterweight bar 36 separates from the electromagnet under the action of gravity and moves down along the lifting groove to retract into the first rotating shaft 32. At this time, the first servo motor 312 drives the first electromagnet 37 to rotate idly and cannot transmit power, thereby realizing the clutch transmission.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-5This utility model provides a technical solution: a movable groove is provided inside the third rotating shaft 34, and a movable rod 38 is rotatably connected inside the movable groove. A counterweight rod 39 and a plug rod 311 are respectively installed on the top and bottom surfaces of the movable rod 38. A second electromagnet 310 is rotatably connected to the top surface of the clutch box 31, directly above the counterweight rod 39. The counterweight rod 39 is made of magnetic material, and the second electromagnet 310 is magnetically connected to the counterweight rod 39. A first servo motor 312 and a second servo motor 313 are respectively installed on both sides of the top surface of the clutch box 31. The output end of the first servo motor 312 is connected to the first electromagnet. The end of the second servo motor 313 away from the counterweight bar 36 is fixedly connected to the output end of the second electromagnet 310 away from the counterweight bar 39. The clamping assembly 4 includes a connecting frame 41, which is disposed on the bottom surface of the clutch box 31. The top surface of the connecting frame 41 is fixedly connected to the bottom surface of the third rotating shaft 34. The connecting frame 41 has an installation cavity inside. Slide grooves 42 are provided on both sides of the installation cavity inside the connecting frame 41. Slide seats 43 are slidably connected inside the two slide grooves 42. The slide seats 43 are T-shaped. A bidirectional lead screw 45 is threaded between the pair of slide seats 43. The outer wall of the bidirectional lead screw 45 is rotatably connected to the inner wall of the connecting frame 41. A pair of slides 43 each have a clamping seat 44 mounted on their outer walls near the bottom. A worm gear 46 is fitted onto the outer side of the bidirectional lead screw 45 within the mounting cavity. A worm 47 is rotatably connected inside the mounting cavity, meshing with the worm gear 46. Both ends of the worm 47 extend through the mounting cavity to the outside. An internal hexagonal slot is formed on the top surface of the worm 47, which is inserted into one end of the insertion rod 311. Because the insertion rod 311 and the internal hexagonal slot are inserted, when the counterweight rod 39 is attracted to the second electromagnet 310, and the second servo motor... 313 drives the second electromagnet 310 to rotate, thereby enabling the moving rod 38 to rotate within the moving groove. This causes the insert rod 311 to rotate, driving the worm 47 to rotate. Under the meshing action with the worm wheel 46, the bidirectional lead screw 45 rotates. The two sliding blocks 43 at the opposite threads on the outside of the bidirectional lead screw 45 move linearly towards the center under the sliding connection of the sliding groove 42, thus clamping the lampshade. After clamping, the second electromagnet 310 is de-energized. According to the self-locking characteristic of the worm wheel 46 and worm 47 transmission, when the worm 47 is the driving member, the worm wheel 46 cannot drive the worm 47 in the reverse direction, ensuring a stable tightening process.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figures 1-5This utility model provides a technical solution: the lifting assembly 2 includes a top plate 21, and a lifting plate 22 is provided below the top plate 21. Smooth rods 23 are slidably connected to the four corners of the lifting plate 22. The two ends of the smooth rods 23 are fixedly connected to the top surface of the workbench 11 and the bottom surface of the top plate 21, respectively. A notch is provided on the lifting plate 22, and a clutch box 31 is disposed within the notch. The outer wall of the clutch box 31 is fixedly connected to the inner wall of the notch. A linear bearing 24 is installed on the top surface of the workbench 11, and a bearing seat is slidably connected to the outside of the linear bearing 24. The top surface of the bearing seat is fixedly connected to the bottom surface of the lifting plate 22. When the linear bearing 24 drives the bearing seat to move up or down, the lifting plate 22 moves stably up or down on the smooth rods 23. When the lifting plate 22 moves down, the lampshade to be tightened is positioned between a pair of clamping seats 44.

[0033] Specifically, the working principle of this lampshade tightening device is as follows: During use, a high-precision torque wrench is used to assist in testing. First, the lampshade is installed on the light string. Then, the torque wrench simulates the tightening process, gradually increasing the torque and recording the torque value when the lampshade is just tightened without damage. Afterward, the torque of the tightening device is adjusted to near this value, and actual testing and fine-tuning are performed to determine the most suitable torque. This is controlled by the torque meter 12 and the control knob. First, the light string base and lampshade are pre-rotated to ensure their threads are properly threaded. The light string base is engaged and inserted into the base fixture 13; the linear bearing 24 drives the bearing seat to move downward, so that the lifting plate 22 moves stably downward on the light rod 23, so that the lamp cover to be tightened is located between a pair of clamping seats 44; since the insertion rod 311 and the internal hexagonal slot are inserted, when the counterweight rod 39 is attracted to the second electromagnet 310, and the second servo motor 313 drives the second electromagnet 310 to rotate, the moving rod 38 rotates in the moving slot, so that the insertion rod 311 rotates and drives the worm gear 47 to rotate, and interacts with the worm wheel 46. The two-way lead screw 45 rotates under the meshing action. The two sliding blocks 43 at the opposite threads on the outside of the two-way lead screw 45 move linearly towards the center under the sliding connection of the sliding groove 42, thereby clamping the lampshade. After clamping, the second electromagnet 310 is de-energized. According to the self-locking characteristic of the worm gear 46 and worm 47 transmission, when the worm 47 is the driving member, the worm gear 46 cannot drive the worm 47 in the reverse direction, ensuring the stability of the tightening process. When tightening is required, the first electromagnet 37 is energized, and the counterweight 36 is attracted and connected with the first electromagnet. 37 magnetic connection, when the first servo motor 312 drives the first electromagnet 37 to rotate, the counterweight bar 36 and the first rotating shaft 32 follow the rotation, and under the meshing action of the adjacent gears 35, the clamping component 4 is finally rotated; when the torque reaches the threshold, the first electromagnet 37 is de-energized, the counterweight bar 36 separates from the electromagnet under the action of gravity and moves down along the lifting groove and retracts into the first rotating shaft 32. At this time, the first servo motor 312 drives the first electromagnet 37 to rotate idly and cannot transmit power, thereby realizing clutch transmission.

[0034] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. Furthermore, since this application is mainly used to protect mechanical devices, the control methods and circuit connections will not be explained in detail in this application.

Claims

1. A lamp cap screwing device characterized by comprising: The assembly includes a base assembly (1), a lifting assembly (2), a drive assembly (3), and a clamping assembly (4). The lifting assembly (2) is disposed on the top surface of the base assembly (1), the drive assembly (3) is disposed on the lifting assembly (2), and the clamping assembly (4) is disposed on the bottom surface of the drive assembly (3). The drive assembly (3) includes a clutch housing (31). The bottom surface of the clutch housing (31) is sequentially rotatably connected to a first rotating shaft (32), a second rotating shaft (33), and a third rotating shaft (34). The first rotating shaft (32), the second rotating shaft (33), and the third rotating shaft (34) are all fitted with [missing information]. Gears (35), a pair of adjacent gears (35) mesh with each other, the first rotating shaft (32) has a lifting groove inside, the lifting groove has a counterweight (36) inside, the clutch box (31) has a first electromagnet (37) rotatably connected to the top surface of the clutch box (31) directly above the counterweight (36), the counterweight (36) and the first electromagnet (37) are magnetically connected, the base assembly (1) includes a workbench (11), the bottom of the workbench (11) is equipped with a torque meter (12), and the detection end of the torque meter (12) is equipped with a base fixture (13).

2. A lampshade screwing device according to claim 1, characterized in that The counterweight (36) has a regular hexagonal cross-section, and the outer wall of the counterweight (36) slides in conjunction with the inner wall of the lifting groove. The counterweight (36) is made of magnetic material.

3. A lampshade screwing device according to claim 2, characterized in that The third rotating shaft (34) has a moving groove inside, and a moving rod (38) is rotatably connected inside the moving groove. A counterweight rod (39) and a plug rod (311) are respectively installed on the top and bottom surfaces of the moving rod (38). A second electromagnet (310) is rotatably connected to the top surface of the clutch box (31) directly above the counterweight rod (39). The counterweight rod (39) is made of magnetic material, and the second electromagnet (310) is magnetically connected to the counterweight rod (39).

4. A lampshade screwing device according to claim 3, characterized in that The clutch box (31) has a first servo motor (312) and a second servo motor (313) installed on both sides of its top surface. The output end of the first servo motor (312) is fixedly connected to the end of the first electromagnet (37) away from the counterweight bar (36), and the output end of the second servo motor (313) is fixedly connected to the end of the second electromagnet (310) away from the counterweight bar (39).

5. A lampshade tightening device according to claim 1, characterized in that, The clamping assembly (4) includes a connecting frame (41), which is disposed on the bottom surface of the clutch box (31). The top surface of the connecting frame (41) is fixedly connected to the bottom surface of the third rotating shaft (34). The connecting frame (41) has an installation cavity inside. The connecting frame (41) has a sliding groove (42) on both sides of the installation cavity inside. The sliding groove (42) is slidably connected to a slide seat (43). The slide seat (43) is T-shaped. A double-acting screw (45) is threaded between a pair of slide seats (43). The outer wall of the double-acting screw (45) is rotatably connected to the inner wall of the connecting frame (41). A clamping seat (44) is installed on the outer wall of a pair of slide seats (43) near the bottom.

6. A lampshade screwing device according to claim 5, characterized in that The bidirectional lead screw (45) has a worm gear (46) mounted on its exterior inside the mounting cavity. A worm (47) is rotatably connected inside the mounting cavity. The worm (47) meshes with the worm gear (46). Both ends of the worm (47) extend through the mounting cavity to the outside. An internal hexagonal groove is provided inside the top surface of the worm (47). The internal hexagonal groove is inserted into one end of the insert rod (311).

7. A lampshade screwing device according to claim 6, characterized in that The lifting assembly (2) includes a top plate (21), and a lifting plate (22) is provided below the top plate (21). Smooth rods (23) are slidably connected to the four corners of the lifting plate (22). The two ends of the smooth rods (23) are fixedly connected to the top surface of the workbench (11) and the bottom surface of the top plate (21), respectively. A notch is provided on the lifting plate (22). The clutch box (31) is set in the notch, and the outer wall of the clutch box (31) is fixedly connected to the inner wall of the notch. A linear bearing (24) is installed on the top surface of the workbench (11). A bearing seat is slidably connected to the outside of the linear bearing (24). The top surface of the bearing seat is fixedly connected to the bottom surface of the lifting plate (22).

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