Valve rod assembling machine

Abstract

The utility model relates to a valve rod assembling machine which comprises a movable or rotatable assembling table, and a valve rod seat feeding mechanism, a valve rod feeding and assembling mechanism, a bolt feeding and assembling mechanism and a discharging mechanism which are sequentially arranged along the moving direction or the rotating direction of the assembling table. And a positioning device for fixing the valve rod seat is fixedly mounted on the assembly table. The valve rod base feeding mechanism comprises a first feeding device, a first conveying device and a first assembling device, the first feeding device is arranged at the end, away from the assembling table, of the first conveying device, the first assembling device is arranged at the other end of the first conveying device, and the first assembling device is used for installing a valve rod base to the positioning device. And the valve rod feeding and assembling mechanism is used for assembling the valve rod on the valve rod seat. The plug pin feeding and assembling mechanism is used for installing and fixing a valve rod and a plug pin of a valve rod base. The valve rod is assembled through mechanical equipment, and compared with manual work, the assembling efficiency of the valve rod is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spool production equipment, in particular to a valve stem assembly machine. Background Art

[0002] The faucet spool is a key component for controlling the water flow of the faucet, and its structure directly affects the performance and service life of the faucet. The faucet valve stem is an important part of the faucet, and its main function is to drive through rotation, thereby driving the movement or rotation of the spool to achieve the opening, closing or adjustment function of the faucet.

[0003] Such as Figure 1 and Figure 2 As shown, the assembly of the faucet valve stem 110 is usually to assemble the valve stem 110 and the valve stem seat 120 together, and then use a pin to pass through the pin holes on the valve stem seat 120 and the valve stem 110 to complete the installation. The traditional faucet valve stem 110 is usually assembled manually, but the manual assembly efficiency is low and cannot meet the needs of mass production. Summary of the Invention

[0004] The purpose of the utility model is to provide a valve stem assembly machine to solve the above problems.

[0005] To achieve the above purpose, the utility model discloses a valve stem assembly machine, including: a movable or rotatable assembly table and a valve stem seat feeding mechanism, a valve stem feeding and assembling mechanism, a pin feeding and assembling mechanism, and a discharging mechanism arranged in sequence along the moving direction or rotating direction of the assembly table. A positioning device for fixing the valve stem seat is fixedly installed on the assembly table. The valve stem seat feeding mechanism includes a first feeding device, a first conveying device, and a first assembling device. The first feeding device is arranged at one end of the first conveying device away from the assembly table, and the first assembling device is arranged at the other end of the first conveying device. The first assembling device is used to install the valve stem seat onto the positioning device. The valve stem feeding and assembling mechanism is used to assemble the valve stem onto the valve stem seat. The pin feeding and assembling mechanism is used to install and fix the pin for the valve stem and the valve stem seat.

[0006] Preferably, the first feeding device is a vibrating feeding tray, the first conveying device is a conveyor belt, the first assembling device includes a moving device, a power device, and a pushing device. The moving device is arranged at one end of the first conveying device away from the first feeding device, the power device is arranged at one end of the moving device, and the pushing device is arranged on the side of the moving device away from the positioning device.

[0007] Preferably, the mobile device is composed of a sliding groove and a slider moving within the sliding groove. A first placement groove for placing the valve stem seat is formed at the top of the slider. The power device is a first cylinder disposed on one side of the sliding groove, and the telescopic rod of the first cylinder is fixedly connected to the slider. The pushing device is a second cylinder, and a first guiding groove is formed on the sliding groove. The telescopic rod of the second cylinder moves within the first guiding groove after elongation.

[0008] Preferably, the valve stem feeding and assembling mechanism includes a second feeding device, a second conveying device, a second steering device, and a second manipulator. The second feeding device is disposed at one end of the second conveying device away from the assembling table. The second steering device is disposed at the other end of the second conveying device. The second manipulator is disposed on one side of the second steering device, and the second manipulator is used to assemble the valve stem onto the valve stem seat.

[0009] Preferably, second guiding strips are installed on both sides of the second conveying device. The second feeding device is a vibrating feeding tray. The second conveying device is a conveyor belt. The second steering device includes a second rotating cylinder and a rotating seat. The rotating seat is installed on the rotating shaft of the second rotating cylinder. A second placement groove for placing the handle is formed on the circumferential side of the rotating seat, and the valve stem enters the second placement groove from one end of the second conveying device.

[0010] Preferably, the second manipulator includes a horizontal moving platform, a vertical moving device, a second power device, and a second chuck disposed on one side of the second steering device. The second steering device is disposed below the horizontal moving platform. The vertical moving device is installed on the horizontal moving platform. The second power device is installed on the vertical moving device. The second chuck is installed on the second power device. The second power device drives the opening or closing of the second chuck, and the horizontal moving platform drives the second power device to move towards or away from the assembling table.

[0011] Preferably, the pin feeding and assembling mechanism includes a third feeding device, a third conveying device, a third steering device, and a third assembling device. One end of the third conveying device is connected to the third feeding device, and the other end is connected to the third steering device. The third assembling device is disposed on the side of the steering device away from the assembling table, and the third assembling device is used to install and fix the pin of the valve stem and the valve stem seat.

[0012] Preferably, the third feeding device is a vibrating feeding tray, the third conveying device is a conveyor belt, the third steering device includes a reversing table, a guide post, a third rotating cylinder and a rotating disk. The rotating disk is installed on the rotating shaft of the third rotating cylinder, the reversing table is installed on the third rotating cylinder, a groove is formed on the reversing table, the rotating disk is arranged in the groove, a connecting groove communicating with the third conveying device is formed on one side of the groove, the guide post is installed on one side of the reversing table close to the assembling table, a guide hole is formed in the guide post, and the guide hole penetrates through the guide post, the groove and the reversing table. A third placing groove for placing a plug pin is formed on the rotating disk. The third assembling device includes a third cylinder and a push rod. One end of the push rod is slidably connected in the guide hole, and the other end of the push rod is fixedly connected to the telescopic rod of the third cylinder; when the third placing groove is parallel to the guide hole, the third cylinder drives the push rod to push the plug pin from the third placing groove into the guide hole to complete the installation.

[0013] Preferably, the discharging mechanism includes a discharging chute and a fourth manipulator. The discharging chute is fixedly connected to one side of the reversing table, the fourth manipulator is arranged above the discharging chute, the fourth manipulator includes a pawl and a fifth cylinder, the pawl is fixedly connected to the telescopic rod of the fifth cylinder, and the upper surface of the bottom of the pawl is close to the positioning device.

[0014] Preferably, the assembling table is disc-shaped, a rotating device for driving the assembling table to rotate is installed at the bottom of the assembling table, the positioning device includes a positioning block and a pressing block, a positioning groove is formed on the side surface of the positioning block, the cross-sectional shape of the positioning groove is T-shaped, the pressing blocks are fixedly installed on both sides of the top of the positioning block, and the side surfaces of the two pressing blocks close to each other extend above the positioning groove.

[0015] The utility model has the following beneficial effects:

[0016] 1. Using mechanical equipment to assemble the valve stem improves the assembly efficiency of the valve stem compared with manual work. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the assembly structure of the valve stem seat and the valve stem provided in the specific embodiment of the utility model;

[0018] Figure 2 It is an exploded view of the valve stem and the valve stem seat provided in the specific embodiment of the utility model;

[0019] Figure 3 It is a top view schematic diagram of the overall structure provided in the specific embodiment of the utility model;

[0020] Figure 4 It is a three-dimensional structure schematic diagram of the overall structure provided in the specific embodiment of the utility model;

[0021] Figure 5 It is a partial enlarged schematic view of part A provided in the specific embodiment of the present utility model;

[0022] Figure 6 It is a schematic structural view of the valve stem seat feeding mechanism provided in the specific embodiment of the present utility model;

[0023] Figure 7 It is a partial enlarged schematic view of part B provided in the specific embodiment of the present utility model;

[0024] Figure 8 It is a schematic structural view of the valve stem feeding and assembling mechanism provided in the specific embodiment of the present utility model;

[0025] Figure 9 It is a partial enlarged schematic view of part C provided in the specific embodiment of the present utility model;

[0026] Figure 10 It is a schematic structural view of the pin feeding and assembling mechanism provided in the specific embodiment of the present utility model;

[0027] Figure 11 It is a partial enlarged schematic view of part D provided in the specific embodiment of the present utility model;

[0028] Figure 12 It is a schematic structural view of the assembly table and the discharging mechanism provided in the specific embodiment of the present utility model.

[0029] Description of main component symbols:

[0030] 110, valve stem; 120, valve stem seat; 200, assembly table; 210, positioning device; 211, positioning block; 2111, positioning groove; 212, pressing block; 310, first feeding device; 320, first conveying device; 330, chute; 340, slider; 341, first placing groove; 350, first cylinder; 360, second cylinder; 370, first guiding groove; 410, second feeding device; 420, second conveying device; 430, second rotating cylinder; 431, rotating seat; 4311, second placing groove; 440, horizontal moving platform; 450, vertical moving device; 451, second power device; 452, second chuck; 510, third feeding device; 520, third conveying device; 530, reversing table; 531, guiding column; 532, groove; 533, connecting groove; 540, rotating disc; 541, third placing groove; 550, third cylinder; 551, push rod; 610, fourth manipulator; 611, pawl; 620, discharging chute. Specific embodiments

[0031] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] As Figures 1 to 12 shown, the present utility model provides a valve stem 110 assembly machine, comprising: a movable or rotatable assembly table 200, and a valve seat 120 feeding mechanism, a valve stem 110 feeding and assembling mechanism, a pin feeding and assembling mechanism and a discharging mechanism arranged in sequence along the moving direction or the rotating direction of the assembly table 200. A positioning device 210 for fixing the valve seat 120 is fixedly installed on the assembly table 200. The valve seat 120 feeding mechanism includes a first feeding device 310, a first conveying device 320 and a first assembling device. The first feeding device 310 is arranged at one end of the first conveying device 320 away from the assembly table 200, and the first assembling device is arranged at the other end of the first conveying device 320. The first assembling device is used to install the valve seat 120 onto the positioning device 210. The valve stem 110 feeding and assembling mechanism is used to assemble the valve stem 110 onto the valve seat 120. The pin feeding and assembling mechanism is used to install and fix the pin for the valve stem 110 and the valve seat 120.

[0033] As Figure 12 shown, in this embodiment, the assembly table 200 is in a disc shape, and a rotating device for driving the assembly table 200 to rotate is installed at the bottom of the assembly table 200. The rotating device is a rotating cylinder or a motor. The positioning device 210 includes a positioning block 211 and a pressing block 212. A positioning groove 2111 is formed on the side surface of the positioning block 211, and the cross-sectional shape of the positioning groove 2111 is in a T shape. The pressing blocks 212 are fixedly installed on both sides of the top of the positioning block 211, and the sides of the two pressing blocks 212 close to each other extend above the positioning groove 2111.

[0034] As Figures 6 to 7 shown, in this embodiment, the first feeding device 310 is a vibrating feeding tray, the first conveying device 320 is a conveyor belt, the valve seat 120 is placed in the vibrating feeding tray, and the valve seat 120 with a qualified attitude is discharged from the vibrating feeding tray, enters the conveyor belt and is conveyed to the other end of the conveyor belt.

[0035] The first assembling device includes a moving device, a power device and a pushing device. The moving device is arranged at one end of the first conveying device 320 away from the first feeding device 310, the power device is arranged at one end of the moving device, and the pushing device is arranged on the side of the moving device away from the positioning device 210.

[0036] In this embodiment, the mobile device is composed of a sliding groove 330 and a slider 340 that moves within the sliding groove 330. A first placement groove 341 for placing the valve stem seat 120 is provided at the top of the slider 340. The power device is a first cylinder 350 disposed on one side of the sliding groove 330. The telescopic rod of the first cylinder 350 is fixedly connected to the slider 340. The pushing device is a second cylinder 360. A first guiding groove 370 is provided on the sliding groove 330. After the telescopic rod of the second cylinder 360 extends, it moves within the first guiding groove 370. The valve stem seat 120 enters the first placement groove 341 at the top of the slider 340 from the end of the first conveying device 320. Subsequently, the first cylinder 350 pushes the slider 340 to move until the first placement groove 341 coincides with the first guiding groove 370. Then, the second cylinder 360 pushes the valve stem seat 120 within the first placement groove 341, causing the valve stem seat 120 to enter the first guiding groove 370 and finally enter the positioning device 210, completing the installation of the valve stem seat 120.

[0037] As Figures 8 to 9 shown, the valve stem 110 feeding and assembling mechanism includes a second feeding device 410, a second conveying device 420, a second turning device, and a second manipulator. The second feeding device 410 is provided at one end of the second conveying device 420 away from the assembling table 200. The second turning device is provided at the other end of the second conveying device 420. The second manipulator is provided on one side of the second turning device. The second manipulator is used to assemble the valve stem 110 onto the valve stem seat 120.

[0038] In this embodiment, the second feeding device 410 is a vibrating feeding tray. Second guiding strips are installed on both sides of the second conveying device 420. The second conveying device 420 is a conveyor belt. The second turning device includes a second rotating cylinder 430 and a rotating seat 431. The rotating seat 431 is installed on the rotating shaft of the second rotating cylinder 430. A second placement groove 4311 for placing the handle is provided on the circumferential side of the rotating seat 431. The valve stem 110 enters the second placement groove 4311 from one end of the second conveying device 420.

[0039] After the valve stem 110 exits the vibrating discharging tray, the end with the pin hole at its bottom faces the direction of the rotating seat 431. Then, the second conveying device 420 drives the valve stem 110 to move towards the second turning device. The second guiding strips on both sides of the second conveying device 420 keep the valve stem 110 in a posture parallel to the second conveying device 420. The valve stem 110 enters the second placement groove 4311 on the rotating seat 431 from the end of the second conveying device 420. The rotating seat 431 rotates 90°, changing the horizontally placed valve stem 110 into a vertically placed valve stem 110, facilitating the second manipulator to grasp.

[0040] The second manipulator includes a horizontal moving platform 440, a vertical moving device 450, a second power device 451, and a second chuck 452 disposed on one side of the second steering device. The second steering device is disposed below the horizontal moving platform 440. The vertical moving device 450 is mounted on the horizontal moving platform 440. The second power device 451 is mounted on the vertical moving device 450. The second power device 451 is a third cylinder 550. The second chuck 452 is mounted on the second power device 451. The second power device 451 drives the second chuck 452 to open or close. The horizontal moving platform 440 drives the second power device 451 to move in a direction closer to or away from the assembly table 200.

[0041] In this embodiment, the vertical moving device 450 is a fourth cylinder. The second power device 451 is mounted on the piston rod of the fourth cylinder and moves up and down as the piston rod extends and retracts. The horizontal moving platform 440 drives the second power device 451 and the second chuck 452 to move above the rotating seat 431. The vertical moving device 450 drives the second power device 451 and the second chuck 452 to move downward until the second chuck 452 can pick up the valve stem 110. The second power device 451 drives the second chuck 452 to clamp the valve stem 110. Subsequently, the vertical moving device 450 drives the second chuck 452 and the valve stem 110 to move upward. The horizontal moving platform 440 drives the second chuck 452 and the valve stem 110 to move above the assembly table 200 and align with the valve stem seat 120 on the positioning device 210. The vertical moving device drives the second chuck 452 and the valve stem 110 to move downward and insert the valve stem 110 into the valve stem seat 120. The second chuck 452 releases the assembled valve stem 110.

[0042] As Figures 10 to 11 shown, the pin feeding and assembling mechanism includes a third feeding device 510, a third conveying device 520, a third steering device, and a third assembling device. One end of the third conveying device 520 is connected to the third feeding device 510, and the other end is connected to the third steering device. The third assembling device is disposed on the side of the steering device away from the assembly table 200. The third assembling device is used to install and fix the pin of the valve stem 110 and the valve stem seat 120.

[0043] In this embodiment, the third feeding device 510 is a vibrating feeding tray, the third conveying device 520 is a conveyor belt, the third turning device includes a reversing table 530, a guide post 531, a third rotating cylinder and a rotating disk 540. The rotating disk 540 is installed on the rotating shaft of the third rotating cylinder, the reversing table 530 is installed on the third rotating cylinder, a groove 532 is formed on the reversing table 530, the rotating disk 540 is arranged in the groove 532, a connecting groove 533 communicating with the third conveying device 520 is formed on one side of the groove 532, the guide post 531 is installed on the side of the reversing table 530 close to the assembling table 200, a guide hole is formed in the guide post 531, and the guide hole penetrates through the guide post 531, the groove 532 and the reversing table 530. A third placement groove 541 for placing a plug pin is formed on the rotating disk 540.

[0044] After the plug pin enters the third conveying device 520 from the third feeding device 510, it enters the third placement groove 541 on the rotating disk 540 through the connecting groove 533. Subsequently, the third rotating cylinder rotates 90°, making the plug pin parallel to the guide hole. Then, the third assembling device pushes the plug pin through the guide hole and installs it into the plug pin holes on the valve rod seat 120 and the valve rod 110.

[0045] The guide post 531 can keep the plug pin in the correct installation direction and improve the accuracy of plug pin installation.

[0046] The third assembling device includes a third cylinder 550 and a push rod 551. One end of the push rod 551 is slidably connected in the guide hole, and the other end of the push rod 551 is fixedly connected to the telescopic rod of the third cylinder 550. When the third placement groove 541 is parallel to the guide hole, the third cylinder 550 drives the push rod 551 to push the plug pin from the third placement groove 541 into the guide hole and complete the installation.

[0047] After the plug pin is parallel to the guide hole, the push rod 551 pushes the plug pin through the guide hole from the side away from the assembling table 200 and installs it into the plug pin holes on the valve rod seat 120 and the valve rod 110.

[0048] The discharging mechanism includes a discharging chute 620 and a fourth manipulator 610. The discharging chute 620 is fixedly connected to one side of the reversing table 530. The fourth manipulator 610 is arranged above the discharging chute 620. The fourth manipulator 610 includes a claw 611 and a fifth cylinder. The claw 611 is fixedly connected to the telescopic rod of the fifth cylinder, and the bottom of the claw 611 is close to the upper surface of the positioning device 210.

[0049] In this embodiment, after the telescopic rod of the fifth cylinder retracts, the pawl 611 abuts against the assembled valve stem 110 and valve stem seat 120. As the telescopic rod of the fifth cylinder retracts, the valve stem 110 and valve stem seat 120 are gradually pulled out of the positioning device 210 and driven to move towards the discharge chute 620 until they fall into the discharge chute 620 to complete the discharging. Subsequently, the telescopic rod of the fifth cylinder extends again to wait for the next assembled valve stem 110 and valve stem seat 120 to arrive.

[0050] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A valve stem assembly machine, characterized in that: include: A movable or rotatable assembly table (200) and a valve stem seat (120) feeding mechanism, a valve stem feeding assembly mechanism, a latch feeding assembly mechanism and a discharging mechanism sequentially arranged along the moving direction or the rotating direction of the assembly table (200); A positioning device (210) for fixing the valve stem seat (120) is fixedly mounted on the assembly table (200); The valve stem seat (120) feeding mechanism comprises a first loading device (310), a first conveying device (320) and a first assembling device, wherein the first loading device (310) is arranged at one end of the first conveying device (320) away from the assembling table (200), and the first assembling device is arranged at the other end of the first conveying device (320), and the first assembling device is used to install the valve stem seat (120) on the positioning device (210); The valve stem feeding assembly mechanism is used to assemble the valve stem (110) onto the valve stem seat (120); The latch pin feeding assembly mechanism is used to install a latch pin that fixes the valve stem (110) and the valve stem seat (120).

2. A valve stem assembly machine according to claim 1, characterized in that: The first loading device (310) is a vibrating loading tray, the first conveying device (320) is a conveyor belt, and the first assembling device comprises a moving device, a power device and a pushing device, the moving device is arranged at one end of the first conveying device (320) away from the first loading device (310), the power device is arranged at one end of the moving device, and the pushing device is arranged at a side of the moving device away from the positioning device (210).

3. A valve stem assembly machine according to claim 2, characterized in that: The moving device is composed of a slide groove (330) and a slider (340) arranged in the slide groove (330) and moving therein. A first placement groove (341) for placing a valve stem seat (120) is provided on the top of the slider (340). The power device is a first cylinder (350) arranged on one side of the slide groove (330). The telescopic rod of the first cylinder (350) is fixedly connected to the slider (340). The pushing device is a second cylinder (360). A first guide groove (370) is provided on the slide groove (330). The telescopic rod of the second cylinder (360) moves in the first guide groove (370) after being extended.

4. The valve stem assembly machine according to claim 1, characterized in that: The valve stem feeding and assembly mechanism comprises a second loading device (410), a second conveying device (420), a second steering device and a second manipulator, wherein the second loading device (410) is arranged at one end of the second conveying device (420) away from the assembly table (200), the second steering device is arranged at the other end of the second conveying device (420), the second manipulator is arranged on one side of the second steering device, and the second manipulator is used to assemble the valve stem (110) onto the valve stem seat (120).

5. A valve stem assembly machine according to claim 4, characterized in that: Second guide bars are installed on both sides of the second conveying device (420), the second loading device (410) is a vibrating loading plate, the second conveying device (420) is a conveyor belt, and the second steering device includes a second rotating cylinder (430) and a rotating seat (431), the rotating seat (431) is installed on the rotating shaft of the second rotating cylinder (430), and a second placement groove (4311) for placing a handle is opened on the peripheral side of the rotating seat (431), and the valve stem (110) enters the second placement groove (4311) from one end of the second conveying device (420).

6. A valve stem assembly machine according to claim 5, characterized in that: The second manipulator comprises a horizontal moving platform (440), a vertical moving device (450), a second power device (451) and a second chuck (452) arranged on one side of a second steering device. The second steering device is arranged below the horizontal moving platform (440). The vertical moving device (450) is installed on the horizontal moving platform (440). The second power device (451) is installed on the vertical moving device (450). The second chuck (452) is installed on the second power device (451). The second power device (451) drives the second chuck (452) to open or close. The horizontal moving platform (440) drives the second power device (451) to move toward or away from the assembly table (200).

7. The valve stem assembly machine according to claim 1, characterized in that: The latch feeding assembly mechanism comprises a third loading device (510), a third conveying device (520), a third steering device and a third assembly device. One end of the third conveying device (520) is connected to the third loading device (510), and the other end is connected to the third steering device. The third assembly device is arranged on a side of the steering device away from the assembly platform (200). The third assembly device is used to install the latch that fixes the valve stem (110) and the valve stem seat (120).

8. The valve stem assembly machine according to claim 7, characterized in that: The third loading device (510) is a vibrating loading plate, the third conveying device (520) is a conveyor belt, the third steering device comprises a reversing platform (530), a guide column (531), a third rotating cylinder and a rotating plate (540), the rotating plate (540) being mounted on a rotating shaft of the third rotating cylinder, the reversing platform (530) being mounted on the third rotating cylinder, the reversing platform (530) being provided with a groove (532), the rotating plate (540) being arranged in the groove The groove (532) is provided with a connection groove (533) connected to the third conveying device (520) on one side of the groove (532); the guide column (531) is installed on the side of the reversing platform (530) close to the assembly platform (200); the guide column (531) is provided with a guide hole, and the guide hole passes through the guide column (531), the groove (532) and the reversing platform (530); and the rotating disk (540) is provided with a third placement groove (541) for placing a latch; The third assembly device comprises a third cylinder (550) and a push rod (551), one end of the push rod (551) is slidably connected in the guide hole, and the other end of the push rod (551) is fixedly connected to the telescopic rod of the third cylinder (550); when the third placement groove (541) is parallel to the guide hole, the third cylinder (550) drives the push rod (551) to push the latch from the third placement groove (541) into the guide hole, and the installation is completed.

9. The valve stem assembly machine according to claim 1, characterized in that: The discharging mechanism includes a discharging chute (620) and a fourth manipulator (610), wherein the discharging chute (620) is fixedly connected to one side of the reversing platform (530), and the fourth manipulator (610) is arranged above the discharging chute (620). The fourth manipulator (610) includes a claw (611) and a fifth cylinder, wherein the claw (611) is fixedly connected to the telescopic rod of the fifth cylinder, and the bottom of the claw (611) is close to the upper surface of the positioning device (210).

10. The valve stem assembly machine according to claim 1, characterized in that: The assembly table (200) is disc-shaped. A rotating device for driving the assembly table (200) to rotate is installed at the bottom of the assembly table (200). The positioning device (210) comprises a positioning block (211) and a pressing block (212). A positioning groove (2111) is provided on the side of the positioning block (211). The cross-sectional shape of the positioning groove (2111) is T-shaped. The pressing blocks (212) are fixedly mounted on both sides of the top of the positioning block (211), and the sides of the two pressing blocks (212) that are close to each other extend to the top of the positioning groove (2111).

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