A drag type automatic screw machine

Abstract

The present invention discloses a dragging type automatic screw machine, comprising a base, a fixing mechanism, a dragging mechanism and a limiting mechanism, wherein a Y-axis control console is arranged on the base, a fixing mechanism is arranged on the Y-axis control console, a dragging mechanism is arranged on the base, a limiting mechanism is arranged on the dragging mechanism, a fixing frame is installed on the dragging mechanism, an electric push rod is installed on the fixing frame, a fixing piece is fixed on one end of the electric push rod, before screwing a workpiece, firstly, a secondary shaft is manually dragged through a first connecting piece, so that the secondary shaft rotates inside a limiting slide groove with the main shaft as the center of the circle, and its own position is changed, and through a second connecting piece, the connecting frame is rotated and adjusted with the secondary shaft as the center of the circle, and the position of the fixing frame arranged on one side of the connecting frame is changed, and the programmed control of the position movement of the electric screw is replaced by manual adjustment, thereby simplifying the operation steps and reducing the requirements for technical personnel.

Description

Technical Field

[0001] The invention belongs to the technical field of screw machines, and in particular relates to a drag-type automatic screw machine. Background Art

[0002] The automatic screw locking machine uses various electric and pneumatic components to realize automatic conveying, tightening, and detection of screws. It simplifies the screw tightening process through the equipment, reduces the number of manual labor and reduces the adverse factors caused by manual misoperation. It is a typical non-standard automation equipment.

[0003] The automatic screw machine is a machine used to replace the traditional manual tightening of screws. The automatic screw machine feeding system feeds the screws one by one, and then the intelligent electric screwdriver extracts the screws and locks them into the product. Compared with the traditional manual screw assembly, it greatly improves the efficiency and increases the output value.

[0004] The existing screw machines are complex to operate and difficult to program, and require high technical staff; the position of the electric screwdriver cannot be accurately defined after manual movement. Summary of the invention

[0005] In order to solve at least one of the problems mentioned in the above background technology, the present invention provides a drag-type automatic screw machine.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A dragging type automatic screw machine comprises a base, a fixing mechanism, a dragging mechanism and a limiting mechanism, wherein the base is provided with a Y-axis control console, the Y-axis control console is provided with a fixing mechanism, the base is provided with a dragging mechanism, the dragging mechanism is provided with a limiting mechanism, a fixing frame is installed on the dragging mechanism, an electric push rod is installed on the fixing frame, a fixing piece is fixed at one end of the electric push rod, the fixing piece is movably connected to the fixing frame, an electric screwdriver is installed on the fixing piece, and a suction nozzle is installed at one end of the electric screwdriver.

[0008] As a further improvement of the above technical solution, the fixing mechanism includes a mounting frame, a threaded hole, a slot, a clamping block, a protrusion, a through hole, a turning handle, a threaded rod and a limit ring. The mounting frame is movably mounted on the Y-axis control console, a threaded hole is opened inside the middle position of one end of the mounting frame, a slot is opened in the middle position of one end of the mounting frame, a clamping block is movably mounted on the mounting frame, a protrusion is arranged in the middle position of one side of the clamping block, a through hole is opened at the center position of the protrusion, the protrusion is installed in the slot, a turning handle is movably mounted on the clamping block, a threaded rod is fixed on one side of the turning handle, the threaded rod passes through the through hole and is connected to the inside of the threaded hole, two groups of limit rings are fixed on the threaded rod, and the two groups of limit rings are arranged on both sides of the protrusion.

[0009] As a further improvement of the above technical solution, the clamping block and the protrusion are an integrated structure, the cross-sectional size of the protrusion is the same as the cross-sectional size of the slot, and a sliding structure is formed between the clamping block and the mounting frame.

[0010] As a further improvement of the above technical solution, the turning handle, the threaded rod and the limiting ring are an integrated structure, two groups of limiting rings are provided, the shortest distance between the two groups of limiting rings is the same as the width of the protrusion, the cross-sectional size of the limiting ring is larger than the cross-sectional size of the through hole, and the threaded rod forms a rotating structure through the through hole and the protrusion.

[0011] As a further improvement of the above technical solution, the dragging mechanism includes a main shaft, a first connecting groove, a first connecting member, a secondary shaft, a second connecting groove, a second connecting member and a connecting frame, the main shaft is vertically fixed on the base, the first connecting groove is provided at one end of the main shaft away from the base, the first connecting member is movably installed on the main shaft, the secondary shaft is installed at one end of the first connecting member away from the main shaft, the second connecting groove is provided at one end of the secondary shaft away from the base, the first connecting member and the second connecting member are installed inside the second connecting groove, the connecting frame is fixedly installed at one end of the second connecting member away from the secondary shaft, and a fixing frame is installed on the connecting frame by bolts.

[0012] As a further improvement of the above technical solution, the main shaft forms a rotating structure through the first connecting member and the secondary shaft, the length of the first connecting member is three times the length of the second connecting member, and the secondary shaft forms a rotating structure through the second connecting member and the connecting frame.

[0013] As a further improvement of the above technical solution, the limiting mechanism includes a limiting member, a first limiting block, a second limiting block, a first limiting groove, a second limiting groove and a limiting slide groove. The first limiting block and the second limiting block are respectively arranged at both ends of the limiting member. The top end of the secondary shaft is provided with a first limiting groove, and the top end of the connecting frame is provided with a second limiting groove. The first limiting block and the second limiting block are respectively installed in the inside of the first limiting groove and the second limiting groove. The upper surface of the base is symmetrically provided with two groups of limiting slide grooves, and the bottom end of the secondary shaft is installed in the inside of the limiting slide groove.

[0014] As a further improvement of the above technical solution, the limit member, the first limit block and the second limit block are an integrated structure, the first limit block and the second limit block have the same shape and size, and multiple groups of teeth are arranged at equal angles on the outside of the first limit block.

[0015] As a further improvement of the above technical solution, a detachable structure is formed between the limiting member and the secondary shaft and the connecting frame, the first limiting groove and the second limiting groove opened at the top of the secondary shaft and the connecting frame are the same in shape and size, and the internal size of the first limiting groove is the same as the external size of the first limiting block.

[0016] As a further improvement of the above technical solution, the limiting groove is an arc-shaped structure, the width of the limiting groove is the same as the bottom diameter of the secondary shaft, the limiting groove and the secondary shaft are interference fit, and the depth of the limiting groove is one third of the height of the base.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The dragging type automatic screw machine of the present invention comprises a base, a limiting mechanism, a dragging mechanism and a limiting mechanism, wherein the base is provided with a Y-axis control console, the Y-axis control console is provided with a limiting mechanism, the base is provided with a dragging mechanism, the dragging mechanism is provided with a limiting mechanism, a fixing frame is installed on the dragging mechanism, an electric push rod is installed on the fixing frame, a fixing piece is fixed at one end of the electric push rod, the fixing piece is movably connected to the fixing frame, an electric screwdriver is installed on the fixing piece, and a suction nozzle is installed at one end of the electric screwdriver. Before screwing the workpiece, first manually drag the secondary shaft through the first connecting piece, so that the secondary shaft rotates inside the limiting slide groove with the main shaft as the center, and changes its own position. And through the second connecting piece, the connecting frame is rotated and adjusted with the secondary shaft as the center, and the position of the fixed frame arranged on one side of the connecting frame is changed. Manual adjustment replaces the programmed control of the position movement of the electric screwdriver, which simplifies the operation steps and reduces the requirements for technical personnel. When the electric screwdriver set on the fixed frame moves to the top of the workpiece to be processed, the first limit block and the second limit block set on the limit member are installed and fixed in the first limit groove and the second limit groove, so that the angle between the secondary shaft and the connecting frame is fixed, so that the angle of the fixed frame installed on the connecting frame is fixed. At the same time, through the interference fit between the limiting slide groove and the secondary shaft, the secondary shaft will not be relatively displaced between the secondary shaft and the base when it is not affected by external forces, and the position of the electric screwdriver is manually limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure after partial decomposition of the present invention;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0024] In the figure: 1. base; 2. Y-axis control console; 3. fixing mechanism; 301. mounting frame; 302. threaded hole; 303. slot; 304. clamping block; 305. bump; 306. through hole; 307. turning handle; 308. threaded rod; 309. limiting ring; 4. dragging mechanism; 401. main shaft; 402. first connecting groove; 403. first connecting member; 404. secondary shaft; 405. second connecting groove; 406. second connecting member; 407. connecting frame; 5. limiting mechanism; 501. limiting member; 502. first limiting block; 503. second limiting block; 504. first limiting groove; 505. second limiting groove; 506. limiting slide; 6. fixing frame; 7. electric push rod; 8. fixing member; 9. electric screwdriver; 10. suction nozzle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0026] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0027] Below, refer to Figures 1 to 4 The drag-type automatic screw machine according to the embodiment of the present invention will be described in detail.

[0028] like Figure 1-Figure 4The present invention provides the following technical solutions: a drag-type automatic screw machine, comprising a base 1, a fixing mechanism 3, a dragging mechanism 4 and a limiting mechanism 5, the base 1 is provided with a Y-axis control console 2, the Y-axis control console 2 is provided with a fixing mechanism 3, the base 1 is provided with a dragging mechanism 4, the dragging mechanism 4 is provided with a limiting mechanism 5, a fixing frame 6 is installed on the dragging mechanism 4, an electric push rod 7 is installed on the fixing frame 6, a fixing piece 8 is fixed at one end of the electric push rod 7, the fixing piece 8 is movably connected to the fixing frame 6, an electric screwdriver 9 is installed on the fixing piece 8, and a suction nozzle 10 is installed at one end of the electric screwdriver 9.

[0029] Further, the fixing mechanism 3 includes a mounting frame 301, a threaded hole 302, a slot 303, a clamping block 304, a protrusion 305, a through hole 306, a turning handle 307, a threaded rod 308 and a limiting ring 309. The mounting frame 301 is movably mounted on the Y-axis control console 2. The threaded hole 302 is provided inside the middle position of one end of the mounting frame 301. The slot 303 is provided in the middle position of one end of the mounting frame 301. The clamping block 304 is movably mounted on the mounting frame 301. A protrusion 305 is provided in the middle position of one side of the clamping block 304. The center position of the protrusion 305 is opened. A through hole 306 is provided, and a protrusion 305 is installed in the slot 303. A turning handle 307 is movably installed on the clamping block 304. A threaded rod 308 is fixed on one side of the turning handle 307. The threaded rod 308 passes through the through hole 306 and is connected to the inside of the threaded hole 302. Two groups of limiting rings 309 are fixed on the threaded rod 308, and the two groups of limiting rings 309 are arranged on both sides of the protrusion 305. By providing an adjustable clamping block 304, the clamping block 304 cooperates with the mounting frame 301 to fix workpieces of different sizes, and the Y-axis control console 2 is used to control the movement of the workpiece.

[0030] Furthermore, the clamp block 304 and the protrusion 305 are an integrated structure, the cross-sectional dimensions of the protrusion 305 are the same as the cross-sectional dimensions of the slot 303, a sliding structure is formed between the clamp block 304 and the mounting frame 301, and the protrusion 305 fixed on the clamp block 304 is arranged inside the slot 303, and the protrusion 305 is limited by the slot 303, so that the clamp block 304 can slide on the mounting frame 301.

[0031] Furthermore, the turning handle 307, the threaded rod 308 and the limiting ring 309 are an integrated structure, and two groups of limiting rings 309 are provided. The shortest distance between the two groups of limiting rings 309 is the same as the width of the protrusion 305. The cross-sectional size of the limiting ring 309 is larger than the cross-sectional size of the through hole 306. The threaded rod 308 forms a rotating structure through the through hole 306 and the protrusion 305. The threaded rod 308 is installed on the clamping block 304 through the through hole 306, and the position between the threaded rod 308 and the clamping block 304 is fixed by two groups of limiting rings 309. By rotating the turning handle 307, one end of the threaded rod 308 moves inside the threaded hole 302, thereby changing the positional relationship between the threaded rod 308 and the mounting frame 301, and then the clamping block 304 is driven to move on the mounting frame 301 through the limiting ring 309.

[0032] Further, the dragging mechanism 4 includes a main shaft 401, a first connecting groove 402, a first connecting member 403, a secondary shaft 404, a second connecting groove 405, a second connecting member 406 and a connecting frame 407. The main shaft 401 is vertically fixed on the base 1, and the first connecting groove 402 is provided at one end of the main shaft 401 away from the base 1. The first connecting member 403 is movably installed on the main shaft 401, and the secondary shaft 404 is installed at one end of the first connecting member 403 away from the main shaft 401. The second connecting groove 405 is provided at one end of the secondary shaft 404 away from the base 1. The second connecting groove 405 is provided inside the connecting frame 407. A first connecting member 403 and a second connecting member 406 are installed, and a connecting frame 407 is fixedly installed at one end of the second connecting member 406 away from the secondary shaft 404, and a fixing frame 6 is installed on the connecting frame 407 by bolts. The main shaft 401, the secondary shaft 404 and the connecting frame 407 are connected by the first connecting member 403 and the second connecting member 406. The position of the main shaft 401 and the connecting frame 407 is indirectly controlled by the first connecting member 403 and the second connecting member 406, and the connecting frame 407 and the fixing frame 6 are connected together by bolts, thereby controlling the position of the electric screwdriver 9.

[0033] Furthermore, the main shaft 401 forms a rotating structure with the first connecting member 403 and the secondary shaft 404. The length of the first connecting member 403 is three times the length of the second connecting member 406. The secondary shaft 404 forms a rotating structure with the second connecting member 406 and the connecting frame 407. The main shaft 401 and the secondary shaft 404 are connected by the first connecting member 403, so that the secondary shaft 404 can change its position within a certain range of the main shaft 401 with the help of the first connecting member 403. Similarly, the secondary shaft 404 and the connecting frame 407 are connected by the second connecting member 406, so that the connecting frame 407 can change its position within a certain range of the secondary shaft 404 with the help of the second connecting member 406, thereby realizing the adjustment of the position of the electric screwdriver 9.

[0034] Furthermore, the limiting mechanism 5 includes a limiting member 501, a first limiting block 502, a second limiting block 503, a first limiting groove 504, a second limiting groove 505 and a limiting slide 506. The first limiting block 502 and the second limiting block 503 are respectively arranged at both ends of the limiting member 501. The top of the secondary shaft 404 is provided with a first limiting groove 504, and the top of the connecting frame 407 is provided with a second limiting groove 505. The first limiting block 502 and the second limiting block 503 are respectively installed in the first limiting groove 504 and the second limiting groove 505. Two groups of limiting slides 506 are symmetrically provided on the upper surface of the base 1. The bottom end of the secondary shaft 404 is installed in the limiting slide 506. The position of the secondary shaft 404 is limited by the limiting slide 506, and the angle between the secondary shaft 404 and the connecting frame 407 is limited by means of the limiting member 501, so that the final position of the electric screwdriver 9 is limited.

[0035] Furthermore, the limiting member 501, the first limiting block 502 and the second limiting block 503 are an integrated structure, the first limiting block 502 and the second limiting block 503 have the same shape and size, and multiple groups of teeth are arranged at equal angles on the outside of the first limiting block 502. The movement of the first limiting block 502 and the second limiting block 503 is controlled by moving the limiting member 501, and the multiple groups of teeth arranged on the outside of the first limiting block 502 improve the fault tolerance between the first limiting block 502 and the first limiting groove 504.

[0036] Furthermore, a detachable structure is formed between the limiting member 501 and the secondary shaft 404 and the connecting frame 407. The first limiting groove 504 and the second limiting groove 505 opened at the top of the secondary shaft 404 and the connecting frame 407 have the same shape and size. The internal size of the first limiting groove 504 is the same as the external size of the first limiting block 502. By installing and fixing the first limiting block 502 and the second limiting block 503 arranged on the limiting member 501 into the first limiting groove 504 and the second limiting groove 505, the angle between the secondary shaft 404 and the connecting frame 407 is fixed, thereby fixing the angle of the fixing frame 6 installed on the connecting frame 407.

[0037] Furthermore, the limiting groove 506 is an arc-shaped structure, the width of the limiting groove 506 is the same as the bottom diameter of the secondary shaft 404, the limiting groove 506 and the secondary shaft 404 are interference fit, the depth of the limiting groove 506 is one third of the height of the base 1, and the shape of the limiting groove 506 is set so that when the secondary shaft 404 rotates, part of its movement trajectory is inside the limiting groove 506. Through the interference fit between the limiting groove 506 and the secondary shaft 404, the secondary shaft 404 will not be relatively displaced from the base 1 when it is not affected by external forces.

[0038] The working principle and use process of the present invention are as follows: when processing a workpiece, the workpiece to be processed is first placed between the mounting bracket 301 and the clamping block 304, and then the handle 307 is rotated to make one end of the threaded rod 308 move inside the threaded hole 302, thereby changing the position relationship between the threaded rod 308 and the mounting bracket 301, and at the same time, the position between the threaded rod 308 and the clamping block 304 is limited and fixed by two sets of limiting rings 309, so that when the position of the threaded rod 308 moves, the clamping block 304 is driven to move on the mounting bracket 301 through the limiting ring 309 to limit the workpiece to be processed. Before screwing the workpiece to be processed, first, the secondary shaft 404 is manually dragged through the first connecting member 403, so that the secondary shaft 404 rotates inside the limiting slide groove 506 with the main shaft 401 as the center, changing its own position, and the connecting frame 407 is rotated and adjusted with the secondary shaft 404 as the center through the second connecting member 406, changing the connecting frame 40 7, when the electric screwdriver 9 arranged on the fixing frame 6 moves to the upper part of the workpiece to be processed, the first limiting block 502 and the second limiting block 503 arranged on the limiting member 501 are installed and fixed in the first limiting groove 504 and the second limiting groove 505, so as to fix the angle between the secondary shaft 404 and the connecting frame 407, thereby fixing the angle of the fixing frame 6 installed on the connecting frame 407. At the same time, through the interference fit between the limiting slide groove 506 and the secondary shaft 404, the secondary shaft 404 is not affected by external forces, and the secondary shaft 404 and the base 1 do not have relative displacement. The position of the electric screwdriver 9 is manually limited, the screw is transported to the electric screwdriver 9 by the suction nozzle 10, and the electric push rod 7 is controlled by an external device to push the fixing member 8 down, so that the electric screwdriver 9 screws the workpiece to be processed, and through the cooperation of the Y-axis control console 2, the workpiece to be processed is controlled to move, so that the electric screwdriver 9 automatically screws the area where screws are required.

[0039] The dragging type automatic screw machine provided by the embodiment of the present invention comprises a base 1, a fixing mechanism 3, a dragging mechanism 4 and a limiting mechanism 5. The base 1 is provided with a Y-axis control console 2, the Y-axis control console 2 is provided with a fixing mechanism 3, the base 1 is provided with a dragging mechanism 4, the dragging mechanism 4 is provided with a limiting mechanism 5, a fixing frame 6 is installed on the dragging mechanism 4, an electric push rod 7 is installed on the fixing frame 6, a fixing piece 8 is fixed at one end of the electric push rod 7, the fixing piece 8 is movably connected to the fixing frame 6, an electric screwdriver 9 is installed on the fixing piece 8, and a suction nozzle 10 is installed at one end of the electric screwdriver 9. Before screwing the workpiece, firstly, manually drag the secondary shaft 405 through the first connecting member 403, so that the secondary shaft 405 rotates inside the limiting slide groove 506 with the main shaft as the center, and changes its own position. And through the second connecting member 406, the connecting frame 407 is rotated and adjusted with the secondary shaft 405 as the center, and the position of the fixing frame 6 set on one side of the connecting frame 407 is changed. The manual adjustment replaces the program-controlled electric screw position movement, which simplifies the operation steps and reduces the requirements for technicians. When the electric screwdriver 9 moves to the top of the workpiece to be processed, the first limit block 502 and the second limit block 503 provided on the limit piece 501 are installed and fixed into the first limit groove 504 and the second limit groove 505, thereby fixing the angle between the secondary shaft 404 and the connecting frame 407, thereby fixing the angle of the fixing frame installed on the connecting frame, and at the same time, through the interference fit between the limiting groove and the secondary shaft, the secondary shaft and the base will not be relatively displaced when not affected by external forces, and the position of the electric screwdriver is manually limited.

[0040] In the description of the present invention, in addition, the terms "first", "second", "another", "yet another" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0042] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A drag-type automatic screw machine, comprising a base (1), a fixing mechanism (3), a drag mechanism (4) and a limiting mechanism (5), characterized in that: The base (1) is provided with a Y-axis control console (2), the Y-axis control console (2) is provided with a fixing mechanism (3), the base (1) is provided with a dragging mechanism (4), the dragging mechanism (4) is provided with a limiting mechanism (5), the dragging mechanism (4) is provided with a fixing frame (6), the fixing frame (6) is provided with an electric push rod (7), one end of the electric push rod (7) is fixed with a fixing member (8), the fixing member (8) is movably connected to the fixing frame (6), the fixing member (8) is provided with an electric screwdriver (9), and one end of the electric screwdriver (9) is provided with a suction nozzle (10); The fixing mechanism (3) comprises a mounting frame (301), a threaded hole (302), a slot (303), a clamping block (304), a protrusion (305), a through hole (306), a turning handle (307), a threaded rod (308) and a limiting ring (309); the mounting frame (301) is movably mounted on the Y-axis control console (2); a threaded hole (302) is provided in the middle of one end of the mounting frame (301); a slot (303) is provided in the middle of one end of the mounting frame (301); a clamping block (304) is movably mounted on the mounting frame (301); the clamping block (304) ) is provided with a protrusion (305) at the middle position of one side, a through hole (306) is opened at the center position of the protrusion (305), the protrusion (305) is installed in the clamping groove (303), a turning handle (307) is movably installed on the clamping block (304), a threaded rod (308) is fixed on one side of the turning handle (307), the threaded rod (308) passes through the through hole (306) and is connected to the inside of the threaded hole (302), two groups of limiting rings (309) are fixed on the threaded rod (308), and the two groups of limiting rings (309) are arranged on both sides of the protrusion (305); The dragging mechanism (4) comprises a main shaft (401), a first connecting groove (402), a first connecting member (403), a secondary shaft (404), a second connecting groove (405), a second connecting member (406) and a connecting frame (407); the main shaft (401) is vertically fixed on the base (1); the first connecting groove (402) is formed at one end of the main shaft (401) away from the base (1); the first connecting member (403) is movably mounted on the main shaft (401); the first connecting member (403) A secondary shaft (404) is installed at one end of the secondary shaft (403) away from the main shaft (401), a second connecting groove (405) is opened at one end of the secondary shaft (404) away from the base (1), the first connecting member (403) and the second connecting member (406) are installed inside the second connecting groove (405), a connecting frame (407) is installed and fixed at one end of the second connecting member (406) away from the secondary shaft (404), and a fixing frame (6) is installed on the connecting frame (407) by means of bolts; The limiting mechanism (5) comprises a limiting member (501), a first limiting block (502), a second limiting block (503), a first limiting groove (504), a second limiting groove (505) and a limiting slide groove (506); the first limiting block (502) and the second limiting block (503) are respectively arranged at two ends of the limiting member (501); the first limiting groove (504) is provided at the top end of the secondary shaft (404); the second limiting groove (505) is provided at the top end of the connecting frame (407); the first limiting block (502) and the second limiting block (503) are respectively correspondingly mounted inside the first limiting groove (504) and the second limiting groove (505); the upper surface of the base (1) is symmetrically provided with two groups of limiting slide grooves (506); the bottom end of the secondary shaft (404) is mounted inside the limiting slide groove (506); The limiting member (501), the first limiting block (502) and the second limiting block (503) are an integrated structure; the first limiting block (502) and the second limiting block (503) are of the same shape and size; and a plurality of groups of tooth blocks are arranged at equal angles on the outer side of the first limiting block (502).

2. The drag-type automatic screw machine according to claim 1, characterized in that: The clamping block (304) and the protrusion (305) are an integrated structure, the cross-sectional dimensions of the protrusion (305) are the same as the cross-sectional dimensions of the slot (303), and a sliding structure is formed between the clamping block (304) and the mounting frame (301).

3. The drag-type automatic screw machine according to claim 1, characterized in that: The turning handle (307), the threaded rod (308) and the limiting ring (309) are an integrated structure, two groups of the limiting rings (309) are provided, the shortest distance between the two groups of the limiting rings (309) is the same as the width of the protrusion (305), the cross-sectional size of the limiting ring (309) is greater than the cross-sectional size of the through hole (306), and the threaded rod (308) passes through the through hole (306) and the protrusion (305) to form a rotating structure.

4. The drag-type automatic screw machine according to claim 1, characterized in that: The main shaft (401) forms a rotating structure through the first connecting member (403) and the secondary shaft (404); the length of the first connecting member (403) is three times the length of the second connecting member (406); and the secondary shaft (404) forms a rotating structure through the second connecting member (406) and the connecting frame (407).

5. The drag-type automatic screw machine according to claim 1, characterized in that: The limiting member (501) forms a detachable structure with the secondary shaft (404) and the connecting frame (407); the first limiting groove (504) and the second limiting groove (505) opened at the top of the secondary shaft (404) and the connecting frame (407) are of the same shape and size; the internal dimensions of the first limiting groove (504) are the same as the external dimensions of the first limiting block (502).

6. The drag-type automatic screw machine according to claim 1, characterized in that: The limiting slide groove (506) is an arc-shaped structure, the width of the limiting slide groove (506) is the same as the bottom diameter of the secondary shaft (404), the limiting slide groove (506) and the secondary shaft (404) are in an interference fit, and the depth of the limiting slide groove (506) is one third of the height of the base (1).

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