Workpiece posture automatic correction device

Abstract

The application discloses a kind of workpiece posture automatic correction device, it is related to correction device technical field, including being set on the shell of machine body, track and tray, the workpiece body is conveyed on the tray, and the sidewall of shell is slidably connected with lifting head, the bottom of lifting head is rotatably connected with three-jaw chuck, and the sidewall of lifting head is fixedly connected with industrial camera, the sidewall of lifting head is connected with the annular cover of hollow setting by lifting mechanism, and the inner side wall of annular cover is rotatably connected with two symmetrical rotation rings, the sidewall of each rotation ring is fixedly connected with multiple arrayed rubber tubes.This kind of workpiece posture automatic correction device, before posture automatic correction, it is convenient to clean the surface of workpiece body, at the same time, it is convenient to clean the bottom of workpiece body and the top of tray, and can absorb impurities after cleaning, to ensure the efficiency and effect of workpiece body posture automatic correction.

Description

Technical Field

[0001] This invention relates to the field of correction device technology, specifically to an automatic workpiece posture correction device. Background Technology

[0002] An automatic workpiece posture correction device is a device used to automatically adjust the posture of a workpiece to improve production efficiency and product quality. This device typically includes a frame, a correction mechanism, and a position adjustment mechanism. The correction mechanism corrects the workpiece's posture through a specific mechanical structure, ensuring the workpiece is in the correct position during subsequent processing or inspection. The position adjustment mechanism is used to adapt to workpieces of different sizes and shapes, improving the device's versatility and flexibility. Furthermore, some advanced automatic workpiece posture correction devices integrate vision inspection systems and intelligent control systems to achieve a more precise and efficient posture correction process.

[0003] However, in existing automatic workpiece posture correction devices, the workpiece is transported on a pallet and the transport stops when it reaches the correction position. Then, the workpiece needs to be centered, clamped, and rotated for adjustment. However, in actual use, some debris and other impurities easily adhere to the surface and bottom of the workpiece, and some debris and other impurities also easily adhere to the top of the pallet, affecting the clamping and positioning of the workpiece, thus affecting the efficiency and effectiveness of automatic workpiece posture correction.

[0004] Therefore, we propose an automatic workpiece posture correction device. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic workpiece posture correction device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic workpiece posture correction device, comprising a housing, a track, and a tray mounted on a machine body, wherein a workpiece body is conveyed on the tray, and a lifting head is slidably connected to the side wall of the housing, a three-jaw chuck is rotatably connected to the bottom of the lifting head, and an industrial camera is fixedly connected to the side wall of the lifting head. A hollow annular cover is connected to the side wall of the lifting head via a lifting mechanism, and two symmetrically arranged rotating rings are rotatably connected to the inner side wall of the annular cover. A plurality of arrayed rubber tubes are fixedly connected to the side wall of each of the rotating rings, and a plurality of arrayed through holes are opened on the side wall of the rubber tubes. An air extraction mechanism for driving the through holes to extract air is provided on the outer side wall of the annular cover. The rotation of the rotating rings is driven by a first driving mechanism, and a pushing mechanism for pushing the rubber tubes to tilt is provided at the bottom of the annular cover.

[0007] The air extraction mechanism includes an air extraction pipe fixedly connected to the outer wall of the annular cover, and a fixed box fixedly connected to the other end of the air extraction pipe. A connecting pipe is fixedly connected to the side wall of the fixed box away from the air extraction pipe, and a fan is fixedly connected to the other end of the connecting pipe.

[0008] Preferably, the first driving mechanism includes two symmetrically arranged first rotating shafts fixedly and rotatably connected to the top and bottom of the annular cover, and each first rotating shaft has a rubber wheel fixedly connected to its end. The rotation of the first rotating shafts is driven by a driving assembly.

[0009] Preferably, the drive assembly includes two symmetrically arranged second rotating shafts rotatably connected to the top and bottom of the fixed box, and each second rotating shaft has a drive pulley fixedly sleeved on its side wall, and each first rotating shaft has a driven pulley fixedly sleeved on its side wall. The driven pulley and the drive pulley are driven by a belt, and the fixed box is provided with a power mechanism for driving the second rotating shafts to rotate.

[0010] Preferably, the power mechanism includes a power shaft rotatably connected in a fixed box, and both ends of the power shaft are respectively fixed to the ends of a second rotating shaft. A plurality of arrayed blades are fixedly connected to the side wall of the power shaft.

[0011] Preferably, the pushing mechanism includes a movable ring inserted into each rotating ring, and a support frame is fixedly connected to the inner side wall of the annular cover. A first reset mechanism is provided between each movable ring and the support frame, and the movement of the movable ring is driven by a first pushing component.

[0012] Preferably, the first reset mechanism includes two symmetrically arranged first sleeves fixedly connected to the ends of each moving ring, and a first sleeve rod is inserted into each first sleeve. The lower end of the first sleeve rod is fixed to the support frame, and a first spring is sleeved on the side wall of each first sleeve.

[0013] Preferably, the first pushing component includes a third rotating shaft rotatably connected to the inner sidewall of the annular cover, and a rotating disk is fixedly connected to one end of the third rotating shaft. Two symmetrically arranged protrusions are fixedly connected to the sidewall of the rotating disk, and the rotation of the third rotating shaft is driven by a second driving mechanism.

[0014] Preferably, the second drive mechanism includes a gear fixedly sleeved on the side wall of the third rotating shaft, and the side wall of the annular cover is connected to a rack through a moving mechanism, wherein the rack is meshed with the gear.

[0015] Preferably, the moving mechanism includes a fixed plate fixedly connected to the inner side wall of the annular cover, and two symmetrically arranged fixed rods fixedly connected to the bottom of the fixed plate. A stop block is fixedly connected to the lower end of each fixed rod, and a slider is sleeved on the side wall of each fixed rod. The slider is fixed to the side wall of the rack, and a second spring is sleeved on the side wall of each fixed rod. A push rod is fixedly connected to the side wall of the rack, and the lower end of the push rod passes through the bottom of the annular cover.

[0016] Preferably, the lifting mechanism includes a fixed block fixedly connected to the side wall of the lifting head, and a second sleeve rod fixedly connected to the bottom of the fixed block. A second sleeve is sleeved on the side wall of the second sleeve rod, and the lower end of the second sleeve is fixed to the top of the annular cover. A threaded rod is rotatably connected to the bottom of the fixed block. A threaded tube is threadedly connected to the side wall of the threaded rod, and the lower end of the threaded tube is fixed to the top of the annular cover. A motor is fixedly connected to the top of the fixed block, and the output end of the motor is fixed to the upper end of the threaded rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The air extraction mechanism of the present invention facilitates the cleaning of the surface of the workpiece body before automatic posture correction, and also facilitates the cleaning of the bottom of the workpiece body and the top of the tray. Furthermore, it can absorb the impurities after cleaning, thereby ensuring the efficiency and effectiveness of automatic posture correction of the workpiece body. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the shell structure in this invention;

[0021] Figure 3 This is a schematic diagram of the overall structure of the annular cover in this invention;

[0022] Figure 4 This is a partial cross-sectional view of the annular cover in this invention;

[0023] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 6 for Figure 3 Enlarged view at point B in the middle;

[0025] Figure 7 for Figure 4 Enlarged view at point C;

[0026] Figure 8 for Figure 6 Enlarged view at point D;

[0027] Figure 9 for Figure 7 Enlarged view at point E in the middle;

[0028] Figure 10 for Figure 7 Enlarged view of point F in the middle.

[0029] In the diagram: 1. Body; 101. Shell; 102. Track; 103. Pallet; 104. Lifting head; 105. Three-jaw chuck; 106. Industrial camera; 2. Exhaust mechanism; 201. Exhaust pipe; 202. Fixing box; 203. Connecting pipe; 204. Exhaust fan; 3. First drive mechanism; 301. First rotating shaft; 302. Rubber wheel; 4. Drive assembly; 401. Driven pulley; 402. Second rotating shaft; 403. Driven pulley; 404. Belt; 5. Power mechanism; 501. Power shaft; 502. Blade; 6. Push mechanism; 601. Moving ring; 602. Support frame; 7. First reset mechanism; 701. First sleeve; 702. 703. First sleeve rod; 8. First spring; 9. First push assembly; 10. Third rotating shaft; 11. Rotating disk; 12. Protrusion; 13. Second drive mechanism; 14. Gear; 15. Rack; 16. Moving mechanism; 17. Fixed plate; 18. Fixed rod; 19. Stop block; 10. Slider; 10. Second spring; 10. Push rod; 11. Annular cover; 12. Rotating ring; 13. Rubber tube; 14. Through hole; 15. Workpiece body; 16. Lifting mechanism; 17. Fixed block; 18. Second sleeve rod; 19. Second sleeve; 10. Threaded tube; 10. Threaded rod; 10. Motor. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-10The figure shows an automatic workpiece posture correction device, including a housing 101, a track 102, and a tray 103 mounted on a machine body 1. The tray 103 carries a workpiece body 15. A lifting head 104 is slidably connected to the side wall of the housing 101. A three-jaw chuck 105 is rotatably connected to the bottom of the lifting head 104. An industrial camera 106 is fixedly connected to the side wall of the lifting head 104. A hollow annular cover 11 is connected to the side wall of the lifting head 104 via a lifting mechanism 16. Two symmetrically arranged rotating rings 12 are rotatably connected to the inner side wall of the annular cover 11. Multiple arrayed rubber tubes 13 are fixedly connected to the side wall of each rotating ring 12. Multiple arrayed through holes 14 are opened on the side wall of the rubber tubes 13. An air extraction mechanism 2 is provided on the outer side wall of the annular cover 11 for driving the through holes 14 to extract air. The rotation of the rotating rings 12 is driven by a first driving mechanism 3. A pushing mechanism 6 is provided at the bottom of the annular cover 11 for pushing the rubber tubes 13 to tilt.

[0032] The air extraction mechanism 2 includes an air extraction pipe 201 fixedly connected to the outer wall of the annular cover 11, and a fixed box 202 fixedly connected to the other end of the air extraction pipe 201. A connecting pipe 203 is fixedly connected to the side wall of the fixed box 202 away from the air extraction pipe 201, and a fan 204 is fixedly connected to the other end of the connecting pipe 203. Before the automatic posture correction, it is convenient to clean the surface of the workpiece body 15, and at the same time, it is convenient to clean the bottom of the workpiece body 15 and the top of the tray 103. In addition, it can absorb the impurities after cleaning, thereby ensuring the efficiency and effect of the automatic posture correction of the workpiece body 15.

[0033] The first drive mechanism 3 includes two symmetrically arranged first rotating shafts 301 fixedly and rotatably connected to the top and bottom of the annular cover 11, and a rubber wheel 302 is fixedly connected to the end of each first rotating shaft 301. The rotation of the first rotating shaft 301 is driven by the drive assembly 4. The rotation of the first rotating shaft 301 drives the rotation of the rubber wheel 302, which in turn drives the rotating ring 12 and the rubber tube 13 to rotate, making the cleaning efficiency higher and the effect better.

[0034] The drive assembly 4 includes two symmetrically arranged second rotating shafts 402 rotatably connected to the top and bottom of the fixed box 202. Each second rotating shaft 402 has a drive pulley 403 fixedly sleeved on its side wall, and each first rotating shaft 301 has a driven pulley 401 fixedly sleeved on its side wall. The driven pulley 401 and the drive pulley 403 are driven by a belt 404. The fixed box 202 is provided with a power mechanism 5 for driving the second rotating shafts 402 to rotate. The power mechanism 5 drives the second rotating shafts 402 to rotate, thereby driving the first rotating shafts 301 and the rubber wheel 302 to rotate through the drive pulley 403 and the belt 404.

[0035] The power mechanism 5 includes a power shaft 501 rotatably connected inside the fixed box 202, and both ends of the power shaft 501 are fixed to the ends of the second rotating shaft 402 respectively. Multiple arrayed blades 502 are fixedly connected to the side wall of the power shaft 501. When air enters the fixed box 202, it impacts the surface of the blades 502, causing the power shaft 501 to rotate. The rotation of the power shaft 501 drives the rotation of the second rotating shaft 402.

[0036] The pushing mechanism 6 includes a movable ring 601 inserted into each rotating ring 12, and a support frame 602 is fixedly connected to the inner wall of the annular cover 11. A first reset mechanism 7 is provided between each movable ring 601 and the support frame 602. The movement of the movable ring 601 is driven by the first pushing component 8. When the workpiece body 15 is about to fall onto the tray 103, the lifting head 104 is stopped first. Then, the first pushing component 8 pushes the two movable rings 601 to move away from each other. At the same time, the first spring 703 is stretched. At this time, the upper movable ring 601 can push the upper rubber tube 13 to tilt upward, thereby cleaning the bottom of the workpiece body 15. At the same time, the lower movable ring 601 can push the lower rubber tube 13 to tilt downward, thereby cleaning the top of the tray 103 and absorbing the impurities after cleaning, thereby ensuring the efficiency and effect of automatic posture correction of the workpiece body 15.

[0037] The first reset mechanism 7 includes two symmetrically arranged first sleeves 701 fixedly connected to the ends of each moving ring 601, and a first sleeve rod 702 is inserted into each first sleeve 701. The lower end of the first sleeve rod 702 is fixed to the support frame 602, and a first spring 703 is sleeved on the side wall of each first sleeve 701, which guides and resets the movement of the moving ring 601.

[0038] The first pushing assembly 8 includes a third rotating shaft 801 rotatably connected to the inner side wall of the annular cover 11, and a rotating disk 802 is fixedly connected to one end of the third rotating shaft 801. Two symmetrically arranged protrusions 803 are fixedly connected to the side wall of the rotating disk 802. The rotation of the third rotating shaft 801 is driven by the second driving mechanism 9. The second driving mechanism 9 drives the third rotating shaft 801 to rotate, thereby pushing the rotating disk 802 to rotate, so that the two protrusions 803 abut against the opposite ends of the two moving rings 601, thereby pushing the two moving rings 601 to move away from each other.

[0039] The second drive mechanism 9 includes a gear 901 fixedly sleeved on the side wall of the third rotating shaft 801, and a rack 902 connected to the side wall of the annular cover 11 through a moving mechanism 10. The rack 902 is meshed with the gear 901. The moving mechanism 10 drives the rack 902 to move, and the movement of the rack 902 drives the gear 901 to rotate.

[0040] The moving mechanism 10 includes a fixed plate 1001 fixedly connected to the inner side wall of the annular cover 11. Two symmetrically arranged fixed rods 1002 are fixedly connected to the bottom of the fixed plate 1001. A stop block 1003 is fixedly connected to the lower end of the fixed rod 1002. A slider 1004 is sleeved on the side wall of each fixed rod 1002. The slider 1004 is fixed to the side wall of the rack 902. A second spring 1005 is sleeved on the side wall of each fixed rod 1002. A push rod 1006 is fixedly connected to the side wall of the rack 902. The lower end of the push rod 1006 passes through the bottom of the annular cover 11. The annular cover 11 continues to move downward through the lifting mechanism 16. When the lower end of the push rod 1006 abuts against the top of the tray 103, the annular cover 11 continues to move downward, which pushes the rack 902 to move upward along the side wall of the fixed rod 1002. At the same time, the second spring 1005 is compressed.

[0041] The lifting mechanism 16 includes a fixed block 1601 fixedly connected to the side wall of the lifting head 104, and a second sleeve rod 1602 fixedly connected to the bottom of the fixed block 1601. A second sleeve tube 1603 is sleeved on the side wall of the second sleeve rod 1602, and the lower end of the second sleeve tube 1603 is fixed to the top of the annular cover 11. A threaded rod 1605 is rotatably connected to the bottom of the fixed block 1601. A threaded tube 1604 is threadedly connected to the side wall of the threaded rod 1605, and the lower end of the threaded tube 1604 is fixed to the top of the annular cover 11. A motor 1606 is fixedly connected to the top of the fixed block 1601, and the output end of the motor 1606 is fixed to the upper end of the threaded rod 1605. When the motor 1606 is started, the rotation of the motor 1606 drives the rotation of the threaded rod 1605, thereby driving the annular cover 11 to move up and down. When the annular cover 11 moves up and down, the rubber tube 13 moves up and down synchronously through the rotating ring 12.

[0042] Working principle: When in use, the workpiece body 15 is placed on the tray 103 and conveyed along the track 102 with the tray 103. When the tray 103 reaches directly below the lifting head 104, the conveying stops. Then, the motor 1606 is started. The rotation of the motor 1606 drives the rotation of the threaded rod 1605, thereby driving the annular cover 11 to move downward. When the annular cover 11 moves downward, the rotating ring 12 drives the rubber tube 13 to move synchronously, thereby cleaning the surface of the workpiece body 15.

[0043] At the same time, the exhaust fan 204 is started to perform the exhaust operation. At this time, the exhaust is performed through the through hole 14, so that the cleaned impurities can be absorbed and enter the annular cover 11 through the rubber tube 13. Then, it enters the fixed box 202 through the exhaust pipe 201, and is discharged through the connecting pipe 203 and the exhaust fan 204 for filtration and collection. When the air enters the fixed box 202, it impacts the surface of the blade 502, causing the power shaft 501 to rotate. The rotation of the power shaft 501 drives the rotation of the second rotating shaft 402, which in turn drives the first rotating shaft 301 and the rubber wheel 302 to rotate through the drive pulley 403 and the belt 404, thereby driving the rotating ring 12 and the rubber tube 13 to rotate, making the cleaning efficiency higher and the effect better, and ensuring the centering clamping effect of the subsequent three-jaw chuck 105.

[0044] After cleaning is completed, the lifting head 104 moves downward and clamps the top of the workpiece body 15 in the center through the three-jaw chuck 105. After clamping, the lifting head 104 moves the workpiece body 15 upward and the three-jaw chuck 105 rotates, thereby adjusting the angle of the workpiece body 15. At the same time, the industrial camera 106 detects the angle. After adjustment, the lifting head 104 moves the workpiece body 15 downward. When the workpiece body 15 is about to fall on the tray 103, the lifting head 104 is stopped.

[0045] Next, the lifting mechanism 16 causes the annular cover 11 to continue moving downward. When the lower end of the push rod 1006 abuts against the top of the tray 103, the annular cover 11 continues to move downward, pushing the rack 902 to move upward along the side wall of the fixed rod 1002. At the same time, the second spring 1005 is compressed, pushing the gear 901 and the third rotating shaft 801 to rotate, thereby pushing the rotating disk 802 to rotate, causing the two protrusions 803 to abut against the opposite ends of the two moving rings 601, thus pushing the two moving rings 601 to move away from each other. At the same time, the first spring 703 is stretched. At this time, the upper moving ring 601 can push the upper rubber tube 13 to tilt upward, thereby cleaning the bottom of the workpiece body 15. Meanwhile, the lower moving ring 601 can push the lower rubber tube 13 to tilt downward, thereby cleaning the top of the tray 103 and absorbing the impurities after cleaning, thus ensuring the efficiency and effect of automatic posture correction of the workpiece body 15.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic workpiece posture correction device, comprising a housing (101), a track (102), and a tray (103) disposed on a machine body (1), wherein a workpiece body (15) is conveyed on the tray (103), and a lifting head (104) is slidably connected to the side wall of the housing (101), a three-jaw chuck (105) is rotatably connected to the bottom of the lifting head (104), and an industrial camera (106) is fixedly connected to the side wall of the lifting head (104), characterized in that, The side wall of the lifting head (104) is connected to a hollow annular cover (11) via a lifting mechanism (16), and the inner side wall of the annular cover (11) is rotatably connected to two symmetrically arranged rotating rings (12). The side wall of each rotating ring (12) is fixedly connected to multiple arrayed rubber tubes (13), and the side wall of the rubber tubes (13) is provided with multiple arrayed through holes (14). The outer side wall of the annular cover (11) is provided with an air extraction mechanism (2) for driving the through holes (14) to extract air. The rotation of the rotating rings (12) is driven by a first driving mechanism (3), and the bottom of the annular cover (11) is provided with a pushing mechanism (6) for pushing the rubber tubes (13) to tilt. The air extraction mechanism (2) includes an air extraction pipe (201) fixedly connected to the outer wall of the annular cover (11), and a fixed box (202) fixedly connected to the other end of the air extraction pipe (201). A connecting pipe (203) is fixedly connected to the side wall of the fixed box (202) away from the air extraction pipe (201), and a fan (204) is fixedly connected to the other end of the connecting pipe (203). The first drive mechanism (3) includes two symmetrically arranged first rotating shafts (301) fixedly and rotatably connected to the top and bottom of the annular cover (11), and each first rotating shaft (301) is fixedly connected to a rubber wheel (302) at its end. The rotation of the first rotating shaft (301) is driven by the drive assembly (4). The drive assembly (4) includes two symmetrically arranged second rotating shafts (402) rotatably connected to the top and bottom of the fixed box (202), and each second rotating shaft (402) has a drive pulley (403) fixedly sleeved on its side wall, and each first rotating shaft (301) has a driven pulley (401) fixedly sleeved on its side wall. The driven pulley (401) and the drive pulley (403) are driven by a belt (404), and the fixed box (202) is provided with a power mechanism (5) for driving the second rotating shafts (402) to rotate. The power mechanism (5) includes a power shaft (501) rotatably connected in the fixed box (202), and the two ends of the power shaft (501) are respectively fixed to the ends of the second rotating shaft (402). The side wall of the power shaft (501) is fixedly connected with a plurality of arrayed blades (502). The pushing mechanism (6) includes a movable ring (601) inserted in each rotating ring (12), and a support frame (602) is fixedly connected to the inner side wall of the annular cover (11). A first reset mechanism (7) is provided between each movable ring (601) and the support frame (602), and the movement of the movable ring (601) is driven by the first pushing component (8). The first reset mechanism (7) includes two symmetrically arranged first sleeves (701) fixedly connected to the ends of each moving ring (601), and a first sleeve rod (702) is inserted into each first sleeve (701). The lower end of the first sleeve rod (702) is fixed to the support frame (602), and a first spring (703) is sleeved on the side wall of each first sleeve (701). The first pushing component (8) includes a third rotating shaft (801) rotatably connected to the inner side wall of the annular cover (11), and a rotating disk (802) is fixedly connected to one end of the third rotating shaft (801). Two symmetrically arranged protrusions (803) are fixedly connected to the side wall of the rotating disk (802), and the rotation of the third rotating shaft (801) is driven by the second driving mechanism (9). The second drive mechanism (9) includes a gear (901) fixedly sleeved on the side wall of the third rotating shaft (801), and the side wall of the annular cover (11) is connected to a rack (902) through a moving mechanism (10), the rack (902) meshing with the gear (901); The moving mechanism (10) includes a fixed plate (1001) fixedly connected to the inner side wall of the annular cover (11), and two symmetrically arranged fixed rods (1002) are fixedly connected to the bottom of the fixed plate (1001). A stop block (1003) is fixedly connected to the lower end of the fixed rod (1002), and a slider (1004) is sleeved on the side wall of each fixed rod (1002). The slider (1004) is fixed to the side wall of the rack (902), and a second spring (1005) is sleeved on the side wall of each fixed rod (1002). A push rod (1006) is fixedly connected to the side wall of the rack (902), and the lower end of the push rod (1006) is set through the bottom of the annular cover (11).

2. The automatic workpiece posture correction device according to claim 1, characterized in that: The lifting mechanism (16) includes a fixed block (1601) fixedly connected to the side wall of the lifting head (104), and a second sleeve rod (1602) fixedly connected to the bottom of the fixed block (1601). A second sleeve tube (1603) is sleeved on the side wall of the second sleeve rod (1602), and the lower end of the second sleeve tube (1603) is fixed to the top of the annular cover (11). A threaded rod (1605) is rotatably connected to the bottom of the fixed block (1601). A threaded tube (1604) is threadedly connected to the side wall of the threaded rod (1605), and the lower end of the threaded tube (1604) is fixed to the top of the annular cover (11). A motor (1606) is fixedly connected to the top of the fixed block (1601), and the output end of the motor (1606) is fixed to the upper end of the threaded rod (1605).

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