Automatic assembling equipment for square screws of smoke alarm

Abstract

The invention provides smoke alarm square screw automatic assembling equipment which comprises a workbench, a material disc fixing mechanism, a screw assembling mechanism and a screw feeder, the material disc fixing mechanism, the screw assembling mechanism and the screw feeder are installed on the workbench, the material disc fixing mechanism comprises a material clamping table, a material clamping air cylinder and a driving motor, and a material disc is placed on the material clamping table; the material clamping air cylinder penetrates through the material clamping table through an ejector rod to be connected to a material clamping claw on the surface of the material clamping table, the material clamping air cylinder ejects the ejector rod to drive the material clamping claw to clamp a material disc, the lower end of the material clamping table is fixed to a rotating disc, the rotating disc is connected with a driving motor, and the driving motor can drive the rotating disc and the material disc to rotate. According to the automatic assembling equipment for the square screws of the smoke alarm, the screws can be sequentially sucked to a material disc at a material clamping table through a screw taking head in the screw assembling mechanism to be matched with an elastic piece, and the material clamping table can be driven by a rotating disc to rotate, so that the screws can be sequentially fixed to all stations on the edge of the material disc; and the assembly efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of smoke alarm assembly equipment, and particularly to an automatic assembly equipment for square screws of a smoke alarm. Background Art

[0002] A smoke detector is assembled from a PCB board, corresponding components inside the PCB, and components such as a middle buckle. The entire assembly process is complex and requires a large number of delicate operations. In the traditional manual assembly process, it is time-consuming and laborious, not only with low efficiency but also a high error rate. The patent with the application number 202323081962.8 discloses an integrated smoke alarm assembly equipment, including a material taking tray, a conveying mechanism, and multiple processing stations. The conveying mechanism includes an indexing plate, a pulley, and a slide rail. The two ends of the pulley are respectively sleeved on the indexing plate, and the slide rails are arranged at equal intervals outside the pulley. The processing stations are arranged around the slide rails, and a feeding table is installed on the slide rail. A clamping mechanism is provided on the feeding table, and the clamping mechanism is used to fix the material tray on the feeding table. A driving mechanism is provided on one side of the indexing plate, and the driving mechanism is used to drive the clamping mechanism; this assembly equipment can automatically assemble the shrapnel of the smoke alarm material tray. Since the overall shape of the material tray is circular, it is difficult for the existing equipment to screw and assemble multiple shrapnels on the material tray at one time. Therefore, it is still necessary to manually screw and fix the material tray and the shrapnel subsequently, which affects the production efficiency. Summary of the Invention

[0003] (I) Technical Problems to be Solved The problem to be solved by the present invention is to provide an automatic assembly equipment for square screws of a smoke alarm to overcome the defect that the existing smoke alarm assembly equipment cannot automatically screw and assemble the shrapnel.

[0004] (II) Technical Solutions To solve the above technical problems, the present invention provides an automatic assembly device for square screws of a smoke alarm, which includes a workbench, a tray fixing mechanism, a screw assembling mechanism, and a screw feeder installed on the workbench. The tray fixing mechanism is located at the front end of the screw feeder, and the screw assembling mechanism is located on one side. The tray fixing mechanism includes a clamping table, a clamping cylinder, and a driving motor. The clamping table is used for placing the tray, and the assembled tray needs to be manually placed on the clamping table. The clamping cylinder is connected to a clamping claw on the surface of the clamping table through a push rod. When the clamping cylinder ejects the push rod, it can drive the clamping claw to clamp the tray, thereby fixing the tray. The lower end of the clamping table is fixed on a rotating disk, and the rotating disk is connected to the driving motor. The driving motor can drive the rotating disk and the tray connected thereto to rotate; the screw feeder sends out screws, and the screw assembling mechanism transports the screws to the tray for assembly. The tray rotates driven by the rotating disk, and the screws can be sequentially assembled to each station of the tray.

[0005] In some embodiments, a mounting seat is fixed on the workbench. The clamping cylinder and the driving motor are fixed at the bottom of the mounting seat. The interior of the mounting seat is hollow. The rotating disk is rotatably installed on the mounting seat. A driven gear is fixed at the bottom of the rotating disk, and a driving gear meshing with the driven gear is connected to the output shaft of the driving motor. The driven gear and the driving gear are both inside the mounting seat; the clamping cylinder is connected to the push rod through a coupling. The interiors of both ends of the coupling are hollow. One end is connected to the clamping cylinder, and the other end is connected to the push rod. The bottom of the push rod is inserted into the coupling, and arc-shaped grooves are circumferentially provided on the surface of the push rod and the inner wall of the coupling at the same height. Steel balls are assembled in the arc-shaped grooves, that is, the arc-shaped grooves of the coupling and the push rod form a circular ring groove, and the steel balls are placed in the ring groove, enabling the push rod to rotate relative to the coupling. Therefore, the clamping table can drive the clamping claw and the push rod to rotate synchronously.

[0006] In some embodiments, a plurality of elastic pieces are installed on the tray. Positioning ribs are symmetrically provided on the clamping table, and positioning grooves are symmetrically provided on the tray. After the tray is assembled, the positioning ribs pass through the positioning grooves. It is necessary to align the positioning ribs with the positioning grooves after placing the tray to achieve the positioning purpose.

[0007] In some embodiments, a hinge seat is fixed to the end of the ejector rod. The inner sides of the material clamping claws are symmetrically hinged to the hinge seat. A positioning seat is also fixed to the material clamping table. One end of each material clamping claw is hinged to the positioning seat. The ejector rod pushes up the hinge seat. Since the material clamping claws are respectively hinged to the hinge seat and the positioning seat, the outer sides of the material clamping claws will descend when the side of the ejector rod rises, thereby pressing the material tray to achieve fixation.

[0008] In some embodiments, a through rectangular groove is provided at the bottom of the mounting seat. A rectangular block is fixed to the material clamping cylinder. The rectangular block is placed in the rectangular groove. The rectangular block is smaller than the rectangular groove but its long side is longer than the short side of the rectangular groove. Therefore, it cannot rotate in the rectangular groove, thereby restricting the material clamping cylinder and preventing the material clamping cylinder from rotating with the rotating disk.

[0009] In some embodiments, a horizontal material rail is provided on the screw feeder. One end of the material rail is connected to the inside of the screw feeder. The screws inside the screw feeder can be sent out along the material rail. A material taking table is also provided on the screw feeder. The other end of the material rail is located above the material taking table. The material clamping table is located at the front end of the material taking table. A plurality of screw holes are provided on the material taking table. The screws fall into the material taking table along the material rail and enter the screw holes for positioning.

[0010] In some embodiments, the screw assembly mechanism is arranged on one side of the screw feeder and the material tray fixing mechanism. The screw assembly mechanism includes a bracket, a transverse moving table and a lifting table. The transverse moving table is slidably mounted horizontally on the bracket. The lifting table is slidably mounted vertically on the transverse moving table. A screw taking head is mounted on the lifting table. The transverse sliding table is used to drive the screw taking head to move horizontally as a whole. The lifting table is used to drive the screw taking head to lift when taking and placing materials.

[0011] In some embodiments, the screw taking head is fixed to the lower end of the lifting table. A screw tightening motor is liftably mounted at the upper end of the lifting table. The bottom of the screw tightening motor is connected with a screwdriver. The screwdriver can pass through the screw taking head. The bracket is connected to the transverse moving table through a mounting plate. The transverse moving table is slidably mounted on the mounting plate through a horizontal slide rail. The lifting table is slidably mounted on the transverse moving table through a vertical slide rail. The screw tightening motor is slidably mounted on the lifting table through a vertical slide rail. A material taking groove is provided at the bottom of the screw taking head. The material taking groove can suck the screws and then transport them. The transverse moving table, the lifting table, the screw tightening motor, etc. are all pushed by air cylinders to slide along the slide rails. After the screw tightening motor descends, the screwdriver passes through the screw taking head and screws the screw at the connection between the elastic piece and the material tray for fixation.

[0012] (III) Beneficial effects An automatic assembly device for square screws of a smoke alarm provided by the present invention arranges a material clamping table on one side of the material taking table of a screw feeder. The screw taking head in the screw assembly mechanism can sequentially suck the screws to be matched with the elastic sheet on the material tray at the material clamping table. Since the material clamping table can rotate driven by a rotating disk, the screws can be sequentially fixed on each working station at the edge of the material tray, eliminating the need for manual screwing and improving the assembly efficiency. Description of the drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a perspective view of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 2 It is a perspective view of the material tray fixing mechanism of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 3 It is a perspective view of the bottom view of the material tray fixing mechanism of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 4 It is a perspective view of the internal structure of the material tray fixing mechanism of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 5 It is a perspective view of the material clamping table and the material clamping cylinder of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 6 It is a perspective view of the material clamping cylinder, the ejector rod and the material clamping claw of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 7 It is a perspective view of the material clamping cylinder and the ejector rod of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 8 It is a perspective view of the coupling of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 9 It is a perspective view of the screw feeder of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 10 It is a front perspective view of the screw assembly mechanism of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 11 It is a rear perspective view of the screw assembly mechanism of an automatic assembly device for square screws of a smoke alarm of the present invention; Figure 12 This is the bottom three-dimensional view of the screw assembly mechanism of an automatic screw assembly device for a smoke alarm in the present invention; Figure 13 This is the three-dimensional view of the material tray of an automatic screw assembly device for a smoke alarm in the present invention.

[0015] The corresponding component names for each reference numeral in the figure are: 1, workbench; 2, material clamping table; 3, material clamping cylinder; 4, driving motor; 5, material tray; 6, ejector rod; 7, material clamping claw; 8, rotating disk; 9, screw feeder; 10, screw; 11, mounting seat; 12, driven gear; 13, driving gear; 14, coupling; 15, arc groove; 16, elastic sheet; 17, positioning rib; 18, positioning groove; 19, hinge seat; 20, positioning seat; 21, rectangular groove; 22, rectangular block; 23, material rail; 24, material taking table; 25, screw hole; 26, bracket; 27, transverse moving table; 28, lifting table; 29, screw taking head; 30, screw tightening motor; 31, screwdriver; 32, mounting plate; 33, slide rail; 34, material taking groove. Specific Embodiments

[0016] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0017] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application.

[0018] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. In addition, this device and / or this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0019] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. The diagrams only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0020] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the practice can be carried out without these specific details.

[0021] Referring to Figures 1 to 13 , the present invention provides an automatic assembly device for square screws of a smoke alarm, including a workbench 1 and a material tray fixing mechanism, a screw assembly mechanism, and a screw feeder 9 installed on the workbench 1. The screw assembly mechanism is fixed on the workbench 1 through a bracket 26, and the bottom of the material tray fixing mechanism is fixed on the workbench 1 through a mounting seat 11. The material tray fixing mechanism includes a clamping table 2, a clamping cylinder 3, and a driving motor 4. The clamping table 2 is located at the front end of the screw feeder 9, and the screw assembly mechanism is located on one side of the screw feeder 9 and the material tray fixing mechanism, and is used to transport the screws sent out by the screw feeder 9 to the clamping table 2 for assembly; a material tray 5 is placed on the clamping table 2, and a plurality of elastic pieces 16 are installed on the material tray 5. These elastic pieces 16 are assembled onto the material tray 5 by other smoke alarm assembly devices, but are not completely fixed and need to be tightened and fixed by screws 10. The clamping cylinder 3 is connected to a clamping claw 7 on the surface of the clamping table 2 through a push rod 6 passing through the clamping table 2. The cylinder shaft of the clamping cylinder 3 and the push rod 6 are connected through a coupling 14. The bottom of the push rod 6 is inserted into the coupling 14, and arc-shaped grooves 15 are circumferentially provided on the surface and the inner wall of the coupling 14 at the same height. Steel balls are assembled in the arc-shaped grooves 15. The arc-shaped grooves 15 of the coupling 14 and the push rod 6 form a circular closed-loop groove, and the steel balls are located therein, enabling the coupling 14 to act as a bearing. Therefore, the cylinder shafts of the clamping cylinder 3 at both ends of the coupling 14 and the push rod 6 can rotate relative to each other. When the clamping cylinder 3 ejects the push rod 6, it can drive the clamping claw 7 to clamp the material tray 5. The lower end of the clamping table 2 is fixed on a rotating disk 8, and the rotating disk 8 is connected to the driving motor 4 through a transmission structure, enabling the driving motor 4 to drive the rotating disk 8 and the material tray 5 to rotate synchronously. At this time, the clamping claw 7 and the push rod 6 on the material tray 5 also rotate synchronously. The coupling 14 enables the push rod 6 to rotate while the clamping cylinder 3 remains stationary. Since the clamping cylinder 3 needs to be externally connected to an air pipe, it cannot perform rotational motion. The screw feeder 9 can sequentially send out the screws 10, and the screw assembly mechanism transports the screws 10 to the material tray 5 for assembly. During the assembly process, the material tray 5 rotates. Since there are a plurality of elastic pieces 16 on the material tray 5 that need to be assembled, after rotation, the screw assembly mechanism can assemble all the screws 10 onto the material tray 5.

[0022] In some embodiments, as Figures 2 to 6 shown, the clamping cylinder 3 and the driving motor 4 are fixed to the bottom of the mounting seat 11. The interior of the mounting seat 11 is hollow. The rotating disk 8 is rotatably mounted on the mounting seat 11. A driven gear 12 is fixed to the bottom of the rotating disk 8. A driving gear 13 meshing with the driven gear 12 is connected to the output shaft of the driving motor 4. The driven gear 12 and the driving gear 13 are both located in the hollow part of the mounting seat 11. When the driving motor 4 operates, it drives the driven gear 12 and the entire rotating disk 8 to rotate through the driving gear 13, thereby driving the entire clamping table 2 and the material tray 5 to rotate. In this embodiment, positioning ribs 17 are symmetrically provided on the clamping table 2, and positioning grooves 18 are symmetrically provided on the material tray 5. After the material tray 5 is assembled, the positioning ribs 17 pass through the positioning grooves 18. When placing the material tray 5, it is necessary to align the positioning grooves 18 with the positioning ribs 17 for positioning. A hinge seat 19 is fixed to the end of the ejector rod 6. The inner sides of the clamping claws 7 are symmetrically hinged to the hinge seat 19. A positioning seat 20 is also fixed on the clamping table 2. One ends of the clamping claws 7 are hinged to the positioning seat 20. When the ejector rod 6 moves up and down, it will pull the hinge seat 19 to move up and down. Since the inner sides of the clamping claws 7 are hinged to the hinge seat 19 and the lower ends are also hinged to the positioning seat 20, when the ejector rod 6 pushes up the hinge seat 19, it will drive the inner sides of the clamping claws 7 to swing upward, and the outer sides will be pressed downward. The clamping claws 7 are strip-shaped, and the material tray 5 is hollow. The clamping claws 7 pass through the hollow part and the outer edges are placed above the pressing parts of the material tray 5. Therefore, the outer sides of the clamping claws 7 can fix the material tray 5 after being pressed downward. In addition, a through rectangular groove 21 is provided at the bottom of the mounting seat 11. A rectangular block 22 is fixed to the clamping cylinder 3. The rectangular block 22 is placed in the rectangular groove 21. The rectangular groove 21 is larger than the rectangular block 22, but the length of the rectangular block 22 is greater than the width of the rectangular groove 21. Therefore, the rectangular block 22 cannot rotate relative to the rectangular groove 21, thereby preventing the clamping cylinder 3 from rotating along with the rotation of the ejector rod 6.

[0023] In some embodiments, as Figure 9 shown, a horizontal material rail 23 is provided on the screw feeder 9. One end of the material rail 23 is connected to the inside of the screw feeder 9. A material taking table 24 is also provided on the screw feeder 9. The other end of the material rail 23 is located above the material taking table 24. The clamping table 2 is located at the front end of the material taking table 24. A plurality of screw holes 25 are provided on the material taking table 24. The screw feeder 9 transports the screws 10 to the material taking table 24 through the material rail 23 and the screws fall into the screw holes 25 for positioning.

[0024] In some embodiments, as Figures 10 to 12As shown in the figure, the screw assembly mechanism includes a bracket 26, a transverse moving table 27 and a lifting table 28. The bracket 26 is fixed on the workbench 1. The transverse moving table 27 is horizontally slidably mounted on the bracket 26. The lifting table 28 is vertically slidably mounted on the transverse moving table 27. A screw picking head 29 is mounted on the lifting table 28. Specifically, the screw picking head 29 is fixed at the lower end of the lifting table 28. A screw tightening motor 30 is liftably mounted at the upper end of the lifting table 28. A screwdriver 31 is connected to the bottom of the screw tightening motor 30. The screwdriver 31 can pass through the screw picking head 29. The bracket 26 is connected to the transverse moving table 27 through a mounting plate 32. The transverse moving table 27 is slidably mounted on the mounting plate 32 through a horizontal slide rail 33. The lifting table 28 is slidably mounted on the transverse moving table 27 through a vertical slide rail 33. The screw tightening motor 30 is slidably mounted on the lifting table 28 through a vertical slide rail 33. A picking groove 34 is provided at the bottom of the screw picking head 29. Sliders are provided on both the lifting table 28 and the transverse moving table 27 to cooperate with the slide rail 33, and both are driven by air cylinders. The slide rail 33 enables the transverse moving table 27 to slide horizontally along the mounting plate 32. The lifting table 28 can be lifted along the transverse moving table 27. The screw tightening motor 30 is connected to the slide rail 33 through a connecting plate to achieve its lifting along the lifting table 28. And the screw tightening motor 30 and the screw picking head 29 are positioned and connected through a positioning rod. The transverse moving table 27 drives the lifting table 28 and the screw picking head 29 as a whole to horizontally move above the picking table 24. The outside of the screw picking head 29 is connected to air. The picking groove 34 sucks the screw 10 through suction. After the lifting table 28 drives it to descend to suck the screw 10 and then reset and horizontally move above the elastic piece 16 of the material tray 5, the air cylinder drives the screw tightening motor 30 to descend along the slide rail 33, and then the screwdriver 31 passes through the screw picking head 29 to perform the screw tightening work. Through multiple operations and the rotation of the material tray 5, all the elastic pieces 16 are fixed by the screws 10.

[0025] A square screw automatic assembly device for a smoke alarm provided by the present invention arranges the clamping table on one side of the picking table of the screw feeder. The screw picking head in the screw assembly mechanism can sequentially suck the screws to cooperate with the material tray and the elastic piece at the clamping table. Since the clamping table can be rotated driven by the rotating disk, the screws can be sequentially fixed at each station on the edge of the material tray, eliminating the need for manual screw tightening and improving the assembly efficiency.

[0026] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An automatic assembly device for square screws of a smoke alarm, comprising a workbench (1), a tray fixing mechanism, a screw assembly mechanism and a screw feeder (9) mounted on the workbench (1), characterized in that: The tray fixing mechanism includes a material clamping table (2), a material clamping cylinder (3), and a driving motor (4). The material clamping table (2) is used to place a tray (5). The material clamping cylinder (3) is connected to a material clamping claw (7) on the surface of the material clamping table (2) through a push rod (6). When the material clamping cylinder (3) ejects the push rod (6), it can drive the material clamping claw (7) to clamp the tray (5). The lower end of the material clamping table (2) is fixed on a rotating disk (8), and the rotating disk (8) is connected to the driving motor (4). The driving motor (4) can drive the rotating disk (8) and the tray (5) to rotate. The screw feeder (9) sends out screws (10), and the screw assembly mechanism transports the screws (10) to the tray (5) for assembly.

2. The automatic assembly equipment for square screws of the smoke alarm according to claim 1, characterized in that: An installation seat (11) is fixed on the workbench (1). The material clamping cylinder (3) and the driving motor (4) are fixed at the bottom of the installation seat (11). The rotating disk (8) is rotatably installed on the installation seat (11). A driven gear (12) is fixed at the bottom of the rotating disk (8), and a driving gear (13) meshing with the driven gear (12) is connected to the driving motor (4).

3. The automatic assembly device for square screws of a smoke alarm according to claim 2, characterized in that: The material clamping cylinder (3) is connected to the push rod (6) through a coupling (14). The bottom of the push rod (6) is inserted into the coupling (14), and arc-shaped grooves (15) are circumferentially provided on the surface and the inner wall of the coupling (14) at the same height. Steel balls are assembled in the arc-shaped grooves (15).

4. The automatic assembly device for square screws of a smoke alarm according to claim 1, wherein: A plurality of elastic pieces (16) are installed on the tray (5). Positioning ribs (17) are symmetrically provided on the material clamping table (2), and positioning grooves (18) are symmetrically provided on the tray (5). After the tray (5) is assembled, the positioning ribs (17) pass through the positioning grooves (18).

5. The automatic assembly device for square screws of a smoke alarm according to claim 1, characterized in that: A hinge seat (19) is fixed at the end of the push rod (6). The inner sides of the material clamping claws (7) are symmetrically hinged on the hinge seat (19). A positioning seat (20) is also fixed on the material clamping table (2), and one end of each material clamping claw (7) is hinged on the positioning seat (20).

6. The automatic assembly device for square screws of a smoke alarm according to claim 2, characterized in that: A through rectangular groove (21) is provided at the bottom of the installation seat (11). A rectangular block (22) is fixed on the material clamping cylinder (3), and the rectangular block (22) is placed in the rectangular groove (21).

7. The automatic assembly device for square screws of a smoke alarm as described in claim 1, characterized in that: A horizontal material rail (23) is provided on the screw feeder (9). One end of the material rail (23) is connected to the inside of the screw feeder (9). A material taking table (24) is also provided on the screw feeder (9). The other end of the material rail (23) is located above the material taking table (24). The material clamping table (2) is located at the front end of the material taking table (24). A plurality of screw holes (25) are provided on the material taking table (24).

8. The automatic assembly device for square screws of a smoke alarm according to claim 1, characterized in that: The screw assembling mechanism is arranged on one side of the screw feeder (9) and the tray fixing mechanism. The screw assembling mechanism includes a bracket (26), a transverse moving table (27) and a lifting table (28). The transverse moving table (27) is horizontally slidably mounted on the bracket (26), the lifting table (28) is vertically slidably mounted on the transverse moving table (27), and a screw picking head (29) is mounted on the lifting table (28).

9. The automatic assembly device for square screws of a smoke alarm according to claim 8, characterized in that: The screw picking head (29) is fixed to the lower end of the lifting table (28), and a screw tightening motor (30) is liftably mounted at the upper end of the lifting table (28). The bottom of the screw tightening motor (30) is connected with a screwdriver (31), and the screwdriver (31) can pass through the screw picking head (29).

10. The automatic assembly device for square screws of a smoke alarm according to claim 9, characterized in that: The bracket (26) is connected to the transverse moving table (27) through a mounting plate (32). The transverse moving table (27) is slidably mounted on the mounting plate (32) through a horizontal slide rail (33). The lifting table (28) is slidably mounted on the transverse moving table (27) through a vertical slide rail (33). The screw tightening motor (30) is slidably mounted on the lifting table (28) through a vertical slide rail (33). A picking groove (34) is provided at the bottom of the screw picking head (29).

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