Automatic screw locking device compatible with multiple specifications of screws

Abstract

The application is an automatic screw locking device compatible with multiple specifications of screws, relates to the technical field of screw locking, solves the technical problems of needing to replace the whole tool head group and easily causing damage to the bolts or tool heads, and comprises a main support and a locking bolt mounting rack fixedly installed on the main support, a lifting platform is slidably connected to the surface of the locking bolt mounting rack, four evenly distributed compensation rods are arranged below the lifting platform, a tool changing rack is arranged in each compensation rod, three rotating shafts are arranged in each tool changing rack, the three rotating shafts in each tool changing rack form a group, and a corresponding screwdriver is clamped below each rotating shaft in each group, the application can quickly switch and adapt to the fastening requirements of bolts of different specifications through the design of three groups of tool heads of different specifications in the tool changing rack, the size of the tool head can also be flexibly replaced according to the processing environment, and manual labor can also be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of screw locking, in particular to an automatic screw locking device compatible with multiple specifications of screws. BACKGROUND

[0002] In the upgrading process of manufacturing automation, screw locking as the core process of product assembly directly affects product quality and production capacity in terms of efficiency and precision.

[0003] Existing screw locking devices are mostly designed for single specification adaptation, that is, a set of equipment can only correspond to one type of screw locking. When different specifications of screws need to be switched, the entire tool head group needs to be replaced, which is cumbersome and time-consuming, resulting in low efficiency of the production line. Especially in the context of multiple varieties and small batch production, the entire tool head group needs to be replaced and matched again every certain period, and the tool head replacement relies on manual adjustment and positioning, which not only requires a lot of labor, but also easily causes misalignment of the tool head due to human operation errors, affecting locking precision and even causing damage to the workpiece or the tool head.

[0004] Moreover, the locking unit of the equipment is mostly fixed in structure and difficult to adapt to the distribution differences of locking points of different workpieces. When locking needs to be performed on different height positions at the same time, batch operations are required, and synchronous locking cannot be achieved. In addition, for workpieces with uneven surfaces or screws with different feeding lengths, the existing equipment lacks effective buffering, and the conventional uniform process may cause damage to the bolts or tool heads.

[0005] On this basis, the present application provides an automatic screw locking device compatible with multiple specifications of screws to solve the above problems. SUMMARY

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present application provides an automatic screw locking device compatible with multiple specifications of screws, which is ingenious in structure and practical in use, effectively solving the technical problems of the need for overall replacement of tool head groups and the easy damage to bolts or tool heads.

[0007] To achieve the above purpose, the present application adopts the following technical solutions:

[0008] The automatic screw locking device compatible with multiple specifications of screws comprises a main support and a locking bolt mounting rack fixedly installed on the main support, the locking bolt mounting rack is surface-slidably connected with a lifting platform, a plurality of compensation rods are arranged below the lifting platform and are uniformly distributed, a tool changer is arranged in each compensation rod, a plurality of rotating shafts are arranged in each tool changer and form a group, and a corresponding screwdriver is clamped below each rotating shaft in the group.

[0009] Preferably, a plurality of pairs of side limiting sliding grooves are formed in each of the tool changers, a sliding shaft is slidably connected in each of the side limiting sliding grooves, a push ring is fixedly installed on one side of each of the sliding shafts, a lower limiting sliding groove capable of limiting the rotation shaft is formed in the bottom of each of the tool changers, a plurality of push frames are slidably connected in each of the lower limiting sliding grooves, and a positioning limiting frame capable of contacting each other is installed on the top of each of the push frames.

[0010] Preferably, a plurality of adjusting sliding rods are slidably connected on the surface of each of the tool changers and are fixedly installed on one side of different push frames, a threaded screw rod is rotatably connected to one end of each of the adjusting sliding rods, and a threaded sleeve capable of being threadedly connected with the threaded screw rod is fixedly installed on the surface of the tool changer.

[0011] Preferably, a plurality of multi-angle connecting mechanisms are rotatably connected to the lifting platform, the bottom end of each of the multi-angle connecting mechanisms is fixedly installed on the top end of a compensation rod, an adjustable limiting table is slidably connected to the surface of the lock bolt mounting frame, and an adjusting frame is slidably sleeved on the surface of each of the compensation rods.

[0012] Preferably, an extension frame is fixedly installed on one side of each of the adjusting frames, and a discharging port is fixedly installed on one side of each of the extension frames.

[0013] Preferably, a rotating frame is rotatably connected to one side of each of the discharging ports, a discharging pipe is fixedly installed on the inner side of each of the rotating frames, an annular groove is formed in the surface of each of the discharging ports, and two symmetrical flip discharging ports are rotatably connected in the bottom of each of the discharging ports.

[0014] Preferably, a sliding disc is slidably connected in each of the compensation rods, a limiting compression spring is fixedly installed between each of the sliding discs and the compensation rod, and a compensation shaft fixedly installed at the top end of the tool changer is rotatably connected below each of the sliding discs.

[0015] Preferably, a lower gear is fixedly installed below each of the compensation rods, and an upper gear slidably connected in the compensation rod and capable of meshing with the lower gear is fixedly installed on the surface of each of the compensation shafts.

[0016] The present application has the following technical benefits.

[0017] 1. The present application is designed with three groups of different specifications of tool bits (cross screwdriver, inner hexagonal screwdriver, and outer hexagonal screwdriver) in the tool changer, cooperates with the linkage structure of the side limiting sliding groove, the push frame, and the threaded locking mechanism, can be quickly switched to adapt to the fastening needs of different specifications of bolts, the tool bit size can also be flexibly replaced according to the processing environment, greatly reduces the equipment investment cost in the multi-specification processing scene, and can also effectively reduce the manual labor;

[0018] 2. The multi-angle connecting mechanism (combination of buffer spring, support shaft and universal joint) can realize driving rotation at different angles, the cooperation structure of compensation rod, limit compression spring and sliding disc can cope with the locking requirements of different height target positions or different length bolts, and can complete height compensation and buffering without stopping, avoid locking failure caused by uneven workpiece surface or bolt length difference, and avoid bolt or tool bit damage caused by process error. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are included to provide a further understanding of the application, and are made a part of the specification and are included to provide a further understanding of the application. In the drawings:

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the application.

[0021] Figure 2 is a schematic diagram of the assembly structure of the adjusting frame, adjusting mechanism and extension frame in the application.

[0022] Figure 3 is a schematic diagram of the assembly structure of the buffer compression spring, buffer sliding rod and adjustable limit table in the application.

[0023] Figure 4 is a schematic diagram of the assembly structure of the electric push rod, drive motor and motor frame in the application.

[0024] Figure 5 is a schematic diagram of the assembly structure of the tool changing frame, rotating shaft and compensation rod in the application.

[0025] Figure 6 is a schematic diagram of the assembly structure of the adjusting sliding rod, threaded screw rod and pushing frame in the application.

[0026] Figure 7 is a schematic diagram of the assembly structure of the sliding shaft, side limit sliding groove and lower limit sliding groove in the application.

[0027] Figure 8 is a schematic diagram of the assembly structure of the threaded sleeve, adjusting sliding rod and threaded screw rod in the application.

[0028] Figure 9 is a schematic diagram of the assembly structure of the rotating shaft, compensation rod and adjusting sliding rod in the application.

[0029] Figure 10 is a schematic diagram of the assembly structure of the rotating connecting shaft, lower gear and upper gear in the application.

[0030] Figure 11 is a schematic diagram of the assembly structure of the adjustable limit table, extension frame and discharge port in the application.

[0031] Figure 12 Figure 1 is a schematic diagram of the assembly structure of the extension frame, the discharge port and the tool changer in the present application.

[0032] Figure 13 Figure 2 is a schematic diagram of the assembly structure of the rotating frame, the discharge pipe and the annular groove in the present application.

[0033] Reference signs:

[0034] 1, main support; 2, leg; 3, control console; 4, nut feeding table; 5, adjustable vibrating feeding disc; 6, feeding mechanism; 7, material transfer mechanism; 8, bolt feeding table; 9, bolt feeding machine; 10, electric rotating disc; 11, workpiece limiting frame; 12, lock bolt mounting frame; 13, electric push rod; 14, driving motor; 15, motor frame; 16, multi-angle connecting mechanism; 17, lifting table; 18, buffer compression spring; 19, buffer sliding rod; 20, adjustable limiting table; 21, turnover discharge port; 22, adjusting frame; 23, adjusting mechanism; 24, extension frame; 25, discharge port; 26, side connecting plate; 27, tool changer; 28, rotating shaft; 29, compensation rod; 30, threaded sleeve; 31, adjusting sliding rod; 32, threaded screw; 33, pushing frame; 34, pushed ring; 35, sliding shaft; 36, side limiting sliding groove; 37, lower limiting sliding groove; 38, positioning limiting frame; 39, limiting compression spring; 40, sliding disc; 41, rotating connecting shaft; 42, lower gear; 43, upper gear; 44, compensation shaft; 45, rotating frame; 46, discharge pipe; 47, annular groove. DETAILED DESCRIPTION

[0035] The foregoing and other technical contents, features and effects of the present application will be described in detail below with reference to the accompanying drawings. Figures 1 to 13 The detailed description of the embodiments will be clearly presented. The contents mentioned in the following embodiments are all referred to the drawings of the specification.

[0036] The exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0037] The application discloses an automatic screw locking device compatible with multiple specifications of screws, which comprises a main support 1 and a locking bolt mounting rack 12 fixedly installed on the main support 1, wherein the locking bolt mounting rack 12 is composed of two stainless steel rods fixedly installed above the main support 1 and a same stainless steel plate fixedly installed at the top end of the two stainless steel rods, a lifting platform 17 is slidably connected to the surface of the locking bolt mounting rack 12, the lifting platform 17 is used for mounting part of driving equipment, four compensation rods 29 are evenly arranged below the lifting platform 17, a tool changing rack 27 is arranged in each compensation rod 29, the tool changing rack 27 is composed of a hollow stainless steel rod and three stainless steel racks in communication with the internal space of the hollow metal rod, three rotating shafts 28 are arranged in each tool changing rack 27 and form a group, a cross screwdriver, an internal hexagonal screwdriver and an external hexagonal screwdriver are respectively clamped below the three rotating shafts 28 of each group, the tool bits of the three specifications of the cross screwdriver, the internal hexagonal screwdriver and the external hexagonal screwdriver are respectively used for fastening bolts of different specifications, and the specific size can be replaced according to the machining environment, and the screwdrivers can also be installed and matched according to the actual situation.

[0038] Each tool changing rack 27 is provided with three pairs of side limiting sliding grooves 36, a sliding shaft 35 is slidably connected in each pair of side limiting sliding grooves 36, the side limiting sliding groove 36 is an inclined groove, and the sliding shaft 35 can be limited to slide in the left-right direction and the up-down direction at the same time, a push ring 34 is fixedly installed on one side of each sliding shaft 35, the push ring 34 is a ring-shaped stainless steel rack, three push racks 33 are slidably connected in each lower limiting sliding groove 37, each push ring 34 is slidably connected in a different push rack 33, each rotating shaft 28 is fixedly installed on one side of a different sliding shaft 35, and a positioning limiting rack 38 capable of being in contact with each other is installed on the top of each three push racks 33, and the positioning limiting rack 38 is an arrow-shaped stainless steel rack.

[0039] A lower limiting sliding groove 37 capable of limiting the rotating shaft 28 is formed in the bottom of each tool changing rack 27, three adjusting sliding rods 31 fixedly installed on one side of different push racks 33 are slidably connected to the surface of each tool changing rack 27, the adjusting sliding rod 31 is slidably connected in the push rack 33 through a key groove, a threaded screw rod 32 is rotatably connected to one end of each adjusting sliding rod 31, and three threaded sleeves 30 capable of being threadedly connected with the threaded screw rod 32 and symmetrically distributed are fixedly installed on the surface of the tool changing rack 27.

[0040] In this embodiment, according to the actual bolt working requirements, the corresponding tool holder 27 can be selected, and then the adjustment sliding rod 31 corresponding to the target rotating shaft 28 is pushed to the tool holder 27 direction. At this time, the adjustment sliding rod 31 pushes the pusher frame 33 to move inward, the pusher frame 33 pushes the pushed ring 34 and the sliding shaft 35 fixedly installed with the pushed ring 34 to move inward, and in the process of moving inward, the sliding shaft 35 drives the sliding shaft 35 and the target rotating shaft 28 to move downward by means of the limiting of the side limiting sliding groove 36. The positioning limiting frame 38 connected with the target rotating shaft 28 will extrude the other two positioning limiting frames 38 outward in the process of moving inward. At this time, the other two non-target rotating shafts 28 will move outward and upward to be in a standby state. When the threaded rod 32 approaches the threaded sleeve 30, rotating the threaded rod 32 makes the threaded rod 32 clamped into the threaded sleeve 30, realizing the locking of the adjustment sliding rod 31 and the rotating shaft 28.

[0041] As an embodiment, the motor frame 15 is fixedly installed above the lifting platform 17, four driving motors 14 are fixedly installed above the motor frame 15, the driving motors 14 are connected with the power supply and the controller, the output end of each driving motor 14 is fixedly installed with a multi-angle connecting mechanism 16 rotatingly connected to the surface of the lifting platform 17. The multi-angle connecting mechanism 16 is composed of a buffer spring, a supporting shaft and two universal joints, which can realize the driving rotation at different angles. The bottom end of each multi-angle connecting mechanism 16 is fixedly installed at the top end of the compensation rod 29. The surface of the lock bolt mounting frame 12 is slidingly connected with an adjustable limiting table 20. The adjustable limiting table 20 is provided with an automatic locking mechanism, which can cooperate with the progress sensor to control the descending height. The automatic locking mechanism is connected with the power supply and the controller through the progress sensor. The surface of each compensation rod 29 is slidingly sleeved with an adjusting frame 22.

[0042] An adjusting mechanism 23 is arranged between the adjusting frame 22 and the adjustable limiting table 20. The surface of the adjustable limiting table 20 is processed with a plurality of grooves. Each groove is two parallel and identical grooves. The surface of each adjusting frame 22 is provided with a groove matched with each groove. The adjusting mechanism 23 is composed of a conventional bolt and a nut, and the bolt is slidingly connected in the groove.

[0043] The lock bolt mounting frame 12 is fixedly installed with an electric push rod 13 whose output shaft is fixedly connected with the lifting platform 17. The driving motor 14 and the electric push rod 13 are used in cooperation through the progress sensor. When the electric push rod 13 descends to a certain degree, the driving motor 14 starts to work. The electric push rod 13 is connected with the power supply and the controller.

[0044] The lifting platform 17 is fixedly installed with two symmetrically distributed side connecting plates 26 on one side, and the bottom of each side connecting plate 26 is fixedly installed with a buffer sliding rod 19 slidingly connected in the adjustable limiting table 20. The adjustable limiting table 20 and the side connecting plate 26 are fixedly installed with a buffer compression spring 18 therebetween, which can provide a buffer elastic force for the adjustable limiting table 20.

[0045] Each adjusting frame 22 is fixedly installed with an extension frame 24 on one side, and the extension frame 24 is fixedly installed with a discharging port 25 capable of matching the rotating shaft 28 on one side.

[0046] Each discharging port 25 is rotatably connected with a rotating frame 45 on one side, and a tension spring is arranged between the discharging port 25 and the rotating frame 45, which can assist the rotating frame 45 to reset. The inner side of each rotating frame 45 is fixedly installed with a discharging pipe 46 capable of being in communication with the discharging port 25. The surface of each discharging port 25 is provided with an annular groove 47 in communication with the discharging port 25, which can block the discharging pipe 46 to prevent discharging during the locking process. The bottom of each discharging port 25 is rotatably connected with two symmetrically distributed turnover ports 21. A tension spring is arranged between the turnover port 21 and the discharging port 25, which can assist the turnover port 21 to reset. The surface of the turnover port 21 is processed with a tapered groove.

[0047] The main support 1 is fixedly installed with a bolt feeding table 8 on one side, and the bolt feeding table 8 is fixedly installed with a bolt feeding machine 9 above. The bolt feeding machine 9 is connected with the discharging pipe 46 through a hose, and the bolt feeding machine 9 is connected with a power supply and a controller.

[0048] In this embodiment, before the bolt is discharged and locked, the relative position of the discharging port 25 is adjusted through the adjusting frame 22 and the adjusting mechanism 23. The position is determined according to the locking position of the bolt. The bolt feeding machine 9 is controlled to work, and the bolt is blown from the hose into the discharging pipe 46, and then into the turnover port 21 below the discharging port 25. The electric push rod 13 works to drive the lifting platform 17 and the adjustable limiting table 20 to descend. After the adjustable limiting table 20 descends to a certain height, the locking mechanism is controlled to work through the progress sensor, and the lifting platform 17 continues to descend. The rotating shaft 28 enters the discharging port 25 and pushes the discharging pipe 46 into the annular groove 47 during the descending process of the lifting platform 17. When the lifting platform 17 descends to the second set height, the progress sensor controls the driving motor 14 to work, and the bolt descends during the rotating process, and finally the bolt is locked at the target position.

[0049] When the bolt is locked, multiple groups of electric elements can be controlled to reset, and then the above structure is repeatedly worked.

[0050] As an embodiment, a sliding disc 40 is slidingly connected in each compensation rod 29, a hole is formed through the bottom end of the compensation rod 29, the sliding disc 40 is arranged in the hole, and the sliding disc 40 is slidingly connected in the compensation rod 29 through a key groove. A limiting compression spring 39 is fixedly installed between each sliding disc 40 and the compensation rod 29, and the limiting compression spring 39 provides a downward elastic force for the sliding disc 40. A rotating connection shaft 41 is rotatably connected below each sliding disc 40, and a compensation shaft 44 fixedly installed at the top end of the tool changer 27 is installed at the bottom end of each rotating connection shaft 41.

[0051] A lower gear 42 is fixedly installed below each compensation rod 29, and an upper gear 43 fixedly installed in the compensation rod 29 and capable of engaging with the lower gear 42 is fixedly installed on the surface of each compensation shaft 44.

[0052] In this embodiment, when it is necessary to lock bolts at different heights or to lock bolts of different lengths at the same time, the rotating shaft 28 rotates when descending, driving the bolts to be locked into the target position. When the highest bolt is driven in, the remaining rotating shafts 28 continue to descend because the locking work is not completed, and the locked rotating shaft 28 pushes the tool changer 27, the compensation shaft 44, the rotating connection shaft 41, and the sliding disc 40 upward. The upward movement of the compensation shaft 44 drives the upper gear 43 to move upward, and the upper gear 43 is disengaged from the lower gear 42. Even if the compensation rod 29 descends or continues to rotate, it will not affect the compensation shaft 44, the tool changer 27, and the rotating shaft 28 that have been locked. It can achieve different height locking and compensation and protection for excessive error without stopping.

[0053] As an embodiment, a nut feeding table 4 is fixedly installed on one side of the main support 1, two adjustable vibrating feeding discs 5 symmetrically distributed are fixedly installed above the nut feeding table 4, the adjustable vibrating feeding discs 5 are connected to a power supply and a controller, and the adjustable vibrating feeding discs 5 can adjust the height according to the needs. A feeding mechanism 6 capable of matching the two adjustable vibrating feeding discs 5 and a material transfer mechanism 7 capable of matching the feeding mechanism 6 are fixedly installed above the main support 1, the feeding mechanism 6 and the material transfer mechanism 7 are connected to a power supply and a controller, which can assist in transporting nuts to the appropriate position. An electric rotating disc 10 is rotatably connected above the main support 1, the electric rotating disc 10 is connected to a power supply and a controller, four workpiece limiting frames 11 symmetrically distributed and capable of matching the material transfer mechanism 7 are fixedly installed above the electric rotating disc 10, and the workpiece limiting frames 11 can be replaced according to different workpieces.

[0054] In this embodiment, when the nut is fed, the vibration feeding disc 5 is first started to work, the nut is transmitted to the position of the feeding mechanism 6, then the feeding mechanism 6 works to push the nut to the position capable of cooperating with the material transfer mechanism 7, and finally the material transfer mechanism 7 works to place the nut on the workpiece limiting frame 11 to realize the feeding of the nut.

[0055] As an embodiment, the bottom of the main support 1 is fixedly installed with a supporting leg 2, and one side of the main support 1 is fixedly installed with a control console 3.

[0056] Working principle:

[0057] Firstly, the workpiece limiting frame 11 is replaced according to the workpiece specification, the relative position of the adjusting frame 22 and the adjustable limiting table 20 is adjusted through the adjusting mechanism 23, thereby the spacing of the discharge port 25 is positioned, the adjusting sliding rod 31 is loosened by rotating the threaded screw rod 32, the corresponding adjusting sliding rod 31 drives the pushing frame 33, the pushed ring 34 and the sliding shaft 35 to move along the side limiting sliding groove 36, the target rotating shaft 28 (corresponding to a cross, internal hexagonal or external hexagonal screwdriver) is lowered to the position, and the other two rotating shafts 28 are raised to wait for work, and then the threaded screw rod 32 and the threaded sleeve 30 are locked by rotating tightly.

[0058] When the nut is fed, the vibration feeding disc 5 is started, the nut is transmitted to the material transfer mechanism 7 through the feeding mechanism 6, and is placed on the workpiece limiting frame 11 by the material transfer mechanism 7, the workpiece is conveyed to the screw locking station by the rotation of the electric rotating disc 10, then the electric push rod 13 is started by the control of the control console 3, the lifting table 17 is lowered along the locking bolt mounting frame 12, when the adjustable limiting table 20 reaches the set height, the process sensor feeds back the signal through the controller, the bolt feeding machine 9 conveys the bolt to the discharge pipe 46 through the hose, and the bolt falls into the turnover material port 21 through the discharge port 25.

[0059] The lifting table 17 is lowered, the rotating shaft 28 opens the turnover material port 21 and inserts into the bolt head, at the same time, the rotating shaft 28 is rotated by the driving motor 14 through the multi-angle connecting mechanism 16, the limiting compression spring 39 and the buffer compression spring 18 in the compensation rod 29 provide buffer, if there is a height difference, the tool changer 27 with the locked bolt will drive the compensation shaft 44 to move upwards, so that the upper gear 43 and the lower gear 42 are disengaged to avoid interfering with the work of the remaining rotating shaft 28, after the locking is completed, the lifting table 17 is reset by the electric push rod 13, the turnover material port 21 and the discharge pipe 46 are reset under the action of the tension spring, the electric rotating disc 10 conveys the next workpiece, and the above process is repeated.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An automatic screw-locking device compatible with multiple screw sizes, comprising a main support (1) and a screw-locking mounting bracket (12) fixedly mounted on the main support (1), characterized in that, The bolt mounting bracket (12) is slidably connected to a lifting platform (17). Multiple evenly distributed compensating rods (29) are provided below the lifting platform (17). Each compensating rod (29) is provided with a tool changer (27). Each tool changer (27) is provided with multiple rotating shafts (28), and the multiple rotating shafts (28) are a group. Each group of multiple rotating shafts (28) is respectively clamped with a corresponding screwdriver below. Each tool changer (27) has multiple pairs of side limiting slide grooves (36), each pair of side limiting slide grooves (36) is slidably connected to a sliding shaft (35), each sliding shaft (35) is fixedly installed on one side of a pushed ring (34), each tool changer (27) has a lower limiting slide groove (37) at the bottom that can limit the rotation shaft (28), each lower limiting slide groove (37) is slidably connected to multiple push frames (33), each push frame (33) has a positioning limiting frame (38) that can contact each other installed on the top of it; Each of the aforementioned compensating rods (29) is slidably connected to a sliding disc (40), and a limit spring (39) is fixedly installed between each sliding disc (40) and the compensating rod (29). Each sliding disc (40) is rotatably connected to a compensating shaft (44) whose bottom end is fixedly installed at the top of the tool changer (27). A lower gear (42) is fixedly installed below each of the compensation rods (29), and an upper gear (43) is fixedly installed on the surface of each compensation shaft (44), which is slidably connected inside the compensation rod (29) and can mesh with the lower gear (42).

2. The automatic screw-locking device compatible with multiple screw specifications according to claim 1, characterized in that, Each tool changer (27) has multiple adjusting sliding rods (31) that are fixedly installed on one side of different pushers (33) slidably connected to its surface. Each adjusting sliding rod (31) has a threaded screw (32) rotatably connected to one end. Each tool changer (27) has a threaded sleeve (30) that can be threadedly connected to the threaded screw (32) fixedly installed on its surface.

3. The automatic screw-locking device compatible with multiple screw specifications according to claim 1, characterized in that, The lifting platform (17) is rotatably connected to multiple multi-angle connecting mechanisms (16). The bottom end of each multi-angle connecting mechanism (16) is fixedly installed on the top of the compensating rod (29). The surface of the locking bolt mounting bracket (12) is slidably connected to an adjustable limiting platform (20). The surface of each compensating rod (29) is slidably sleeved with an adjusting bracket (22).

4. The automatic screw-locking device compatible with multiple screw specifications according to claim 3, characterized in that, Each of the adjustment frames (22) has an extension frame (24) fixedly installed on one side, and each extension frame (24) has a discharge port (25) fixedly installed on one side.

5. The automatic screw-locking device compatible with multiple screw specifications according to claim 4, characterized in that, Each feeding port (25) is rotatably connected to a rotating frame (45) on one side, and a feeding pipe (46) is fixedly installed on the inner side of each rotating frame (45). An annular groove (47) is opened on the surface of each feeding port (25), and two symmetrically distributed flipping feeding ports (21) are rotatably connected to the bottom of each feeding port (25).

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