Multi-head screw machine

Abstract

The utility model relates to the technical field of screw machines, and discloses a multi-head screw machine which comprises a workbench, a replacing mechanism, an adjusting mechanism, a driving mechanism and a connecting mechanism, the outer wall of the rear end of the workbench is fixedly connected with a side plate, the upper end of the outer wall of the front end of the side plate is fixedly connected with a top plate, and the replacing mechanism is arranged in the workbench. The replacing mechanism comprises a jig, an air cylinder is arranged in the middle of the rear end of the upper end of the top plate, an adjusting mechanism is arranged at the front end of the side plate and comprises an adjusting frame, and a driving mechanism is arranged at the lower end of the top plate. According to the conveying pipe replacing device, the conveying pipe is clamped through an elastic clamping cylinder in the connecting mechanism, a threaded rod is matched to drive a sleeve to move upwards, so that the elastic clamping cylinder deforms, friction force is increased through a friction ring, and the conveying pipe is prevented from falling off; and the fixture block is connected with the jig in a clamping manner, so that the jig is convenient to disassemble and assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw machine technical field especially relates to a multi -head screw machine. BACKGROUND

[0002] Multi -head screw machine is a kind of mechanical equipment that carries out multiple screw installation simultaneously, it not only can improve production efficiency, also can reduce manual operation error, is widely used in electronic, electric appliance, automobile, toy, furniture and other various industries product assembly.

[0003] But, since screw is sent to screw machine for installation by conveying pipe, and the existing multi -head screw machine on the market mostly conveying pipe is easy to fall off in moving process when installing screw, leading to screw conveying interruption, bring inconvenience to installation operation, and the existing multi -head screw machine on the market mostly is not convenient for dismounting and installing fixture of workpiece, increase the operation difficulty of staff when replacing the fixture adapted to different workpieces.

[0004] Therefore, the technical personnel in the art provide a kind of multi -head screw machine to solve the problems raised in the above background art. UTILITY MODEL CONTENT

[0005] The utility model content aims at solving the shortcomings in the prior art and provides a kind of multi -head screw machine, conveying pipe is clamped by elastic clamp cylinder in connecting mechanism, cooperation screw rod drives sleeve to move up, makes elastic clamp cylinder deformation, and increase friction by using friction ring, avoid conveying pipe to fall off, and by replacing the sliding connection of slider and sliding slot in mechanism, using reset spring acts on the clamping block, make clamping block and fixture clamping connection, it is convenient for the dismounting of fixture.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of multi -head screw machine, including workbench, replacement mechanism, adjusting mechanism, drive mechanism and connecting mechanism, the outer wall of the rear end of the workbench is fixedly connected with side plate, the upper end of the outer wall of the front end of the side plate is fixedly connected with top plate, the inside of workbench is provided with replacement mechanism, the replacement mechanism includes fixture, the middle part of the rear end of the top plate upper end is provided with cylinder, the front end of the side plate is provided with adjusting mechanism, the adjusting mechanism includes adjusting frame, the lower end of the top plate is provided with drive mechanism, the drive mechanism includes moving plate, the upper end of the moving plate is fixedly connected with four protective shells;

[0008] The bottom surface inside the protective shell is provided with a servo motor, the output shaft of the servo motor penetrates the protective shell and the moving plate and is fixedly connected with a universal driving shaft, the two sides of the upper end of the workbench are fixedly connected with support rods, the upper end of the support rod is fixedly connected with the top plate, the middle of the lower end of the moving plate is fixedly connected with a compression spring, the lower end of the compression spring is fixedly connected with a connecting rod, the upper end of the connecting rod is fixedly connected with the moving plate, the upper end of the workbench is provided with a connecting mechanism, the connecting mechanism comprises four connecting barrels and four elastic clamping barrels;

[0009] The upper end of the connecting barrel is connected with a sleeve, the two sides of the lower end of the connecting barrel are fixedly connected with a rotating shaft rod, the front end and the rear end of the outer wall of the rotating shaft rod are sleeved with a torsion spring, the front end and the rear end of the rotating shaft rod are rotatably connected with a clamping nozzle, one side of the connecting barrel away from the center of the workbench is fixedly connected with a fixed block, the upper end of the fixed block is rotatably connected with a threaded rod, the outer wall of the rod body of the threaded rod is threadedly connected with a sleeve ring, the sleeve ring is sleeved on the elastic clamping barrel, one side of the elastic clamping barrel close to the center of the workbench is connected with the connecting barrel, and the inner wall of the elastic clamping barrel is fixedly connected with a plurality of friction rings.

[0010] Through the above technical scheme, the elastic clamping barrel fixedly connected with the connecting barrel in the connecting mechanism clamps the conveying pipe, and the friction ring increases the friction between the conveying pipe and the elastic clamping barrel, and the sleeve ring moves up by rotating the threaded rod, so as to apply force to the elastic clamping barrel and make it deform, so as to further fix the conveying pipe, and the conveying pipe falls off from the connecting barrel.

[0011] Further, the two sides of the lower end of the jig are provided with a sliding groove, the middle of the upper end of the workbench is fixedly connected with a sliding block, the middle of the inside of the workbench is provided with a clamping groove, the inner bottom surface of the clamping groove is fixedly connected with three reset springs, the upper end of the reset spring is fixedly connected with a clamping block, the clamping block penetrates the workbench and is connected with the jig, and the two sides of the upper end of the outer wall of the front end of the clamping block are fixedly connected with a pressing block.

[0012] Through the above technical scheme, the sliding block fixedly connected with the workbench and the sliding groove provided on the lower end of the jig in the replacement mechanism are slidably connected, the jig is preliminarily limited to move, the reset spring in the clamping groove provided on the workbench acts on the clamping block, the clamping block is connected with the jig, the moving space of the jig is further limited, and the pressing block can release the clamping of the clamping block on the jig, so as to facilitate the disassembly and installation of the jig.

[0013] Further, one side of the outer wall of the front end of the workbench is fixedly connected with a PLC control panel, and the output shaft of the air cylinder penetrates the top plate and is fixedly connected with the moving plate.

[0014] Through the technical scheme, the PLC control panel fixedly connected on the workbench is convenient for workers to control the running state of the equipment, and the output shaft of the air cylinder penetrates through the top plate and is fixedly connected with the moving plate, so that under the control of the PLC control panel, the air cylinder can drive the moving plate to move up and down along the supporting rod.

[0015] Further, two connecting blocks are fixedly connected to the both sides of the lower end of the adjusting frame through bolts and nuts, and the upper ends of the outer walls of the sleeves are fixedly connected with the connecting blocks.

[0016] Through the technical scheme, the position of the sleeve on the horizontal plane can be changed by changing the position of the connecting block on the hole of the adjusting frame through the bolts and nuts, and then the position of the clamping mouth is adjusted, so that the position of the screw hole on different workpieces can be adjusted.

[0017] Further, screwdriver rods are fixedly connected to the lower ends of the universal driving shafts, and the outer walls of the rod bodies of the screwdriver rods are slidingly connected with the sleeves.

[0018] Through the technical scheme, the driving force of the servo motor can still be transmitted to the screwdriver rod when the sleeve changes the position with the screwdriver rod, and the outer walls of the rod bodies of the screwdriver rods are slidingly connected with the sleeves, so that the screwdriver rod can be displaced relative to the sleeve when the moving plate moves downward, and the screw can be pressed and installed on the workpiece.

[0019] Further, the outer walls of the rod bodies of the supporting rods are slidingly connected with the moving plate and the adjusting frame, and the outer wall of the rod body of the connecting rod is slidingly connected with the adjusting frame.

[0020] Through the technical scheme, the moving plate and the adjusting frame are slidingly connected with the supporting rod, and only the adjusting frame is slidingly connected with the connecting rod, so that when the moving plate moves downward, the adjusting frame is forced by the compression spring, and at the same time, the adjusting frame also moves downward to the position of the stopper fixed on the supporting rod by the gravity, and is stopped at a certain distance above the workpiece, and the moving plate can move downward alone to complete the installation of the screw by the screwdriver rod, and when the moving plate moves upward, the adjusting frame is driven to move upward to the initial position under the limitation of the stop ring fixed at the lower end of the connecting rod.

[0021] Further, one side of the torsional spring close to the center of the rotating shaft is fixedly connected with the connecting cylinder, and the other side of the torsional spring away from the center of the rotating shaft is fixedly connected with the clamping mouth.

[0022] Through the technical scheme, the clamping mouth and the torsional spring are fixedly connected, so that the clamping mouth can be opened when the screw is pushed out of the connecting cylinder by the screwdriver rod, and the clamping mouth can be automatically closed after the installation of the screw is completed.

[0023] Further, the sliding block is slidingly connected with the sliding groove, and the clamping block slides in the clamping groove.

[0024] The above technical solution uses a slider fixed to the worktable and a groove on the fixture to slide and restrict the left and right movement of the fixture. A return spring applies force to the locking block, causing the locking block to engage with the fixture, restricting the front and back movement of the fixture and thus fixing the fixture on the worktable. When the pressing block is pressed, the locking block moves down in the groove, releasing the engagement with the fixture and allowing the fixture to be removed from the slider for easy disassembly.

[0025] This utility model has the following beneficial effects:

[0026] 1. The present invention proposes a multi-head screw machine, which clamps the conveying pipe by means of an elastic clamp fixedly connected to the connecting cylinder in the connecting mechanism, and uses a friction ring to increase the friction between the conveying pipe and the elastic clamp. In conjunction with turning the threaded rod, the collar moves upward, applies force to the elastic clamp and causes it to deform, further fixing the conveying pipe, thereby preventing the conveying pipe from falling off during the movement and causing the screw conveying to be interrupted.

[0027] 2. The multi-head screw machine proposed in this utility model initially restricts the movement of the fixture by sliding the slider fixedly connected to the worktable in the replacement mechanism with the slide groove opened at the lower end of the fixture. In conjunction with the return spring in the slot opened in the worktable, the locking block is engaged with the fixture, further restricting the movement space of the fixture and fixing the fixture on the worktable. This makes it easier for the operator to disassemble and assemble the fixture, and reduces the difficulty of operation when changing fixtures to suit different workpieces. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the main structure of a multi-head screw machine proposed in this utility model;

[0029] Figure 2 This is a cross-sectional view of the worktable, side plate, top plate, adjustment frame, fixture, and clamping block of a multi-head screw machine proposed in this utility model.

[0030] Figure 3 A cross-sectional view of the worktable, fixture, slider, adjusting frame, sleeve, protective shell and top plate of a multi-head screw machine proposed in this utility model;

[0031] Figure 4 Exploded view of the connecting block, torsion spring, rotating shaft, collar, elastic clamp and friction ring of a multi-head screw machine proposed in this utility model;

[0032] Figure 5 Exploded view of the worktable, fixture, return spring and slider of a multi-head screw machine proposed in this utility model;

[0033] Figure 6 for Figure 2Enlarged view of point A in the middle;

[0034] Figure 7 for Figure 3 Enlarged view of point B in the middle.

[0035] Legend:

[0036] 1. Workbench; 2. PLC control panel; 3. Side plate; 4. Top plate; 5. Changing mechanism; 501. Fixture; 502. Slide groove; 503. Slider; 504. Slot; 505. Return spring; 506. Locking block; 507. Pressing block; 6. Cylinder; 7. Adjustment mechanism; 701. Adjustment frame; 702. Connecting block; 703. Compression spring; 704. Connecting rod; 8. Drive mechanism; 801. Protective shell; 802. Servo motor; 803. Universal drive shaft; 804. Screwdriver rod; 805. Support rod; 806. Moving plate; 9. Connecting mechanism; 901. Connecting cylinder; 902. Sleeve; 903. Rotating shaft; 904. Torsion spring; 905. Clamp; 906. Fixing block; 907. Threaded rod; 908. Collar; 909. Elastic clamp; 910. Friction ring. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 The present invention provides a specific embodiment of a multi-head screw machine, comprising a workbench 1, a changing mechanism 5, an adjusting mechanism 7, a driving mechanism 8, and a connecting mechanism 9. A side plate 3 is fixedly connected to the outer wall of the rear end of the workbench 1, and a top plate 4 is fixedly connected to the upper end of the outer wall of the front end of the side plate 3. The changing mechanism 5 is provided inside the workbench 1, and the changing mechanism 5 includes a fixture 501. A cylinder 6 is provided in the middle of the rear end of the upper end of the top plate 4. An adjusting mechanism 7 is provided at the front end of the side plate 3, and the adjusting mechanism 7 includes an adjusting frame 701. A driving mechanism 8 is provided at the lower end of the top plate 4, and the driving mechanism 8 includes a moving plate 806. Four protective shells 801 are fixedly connected to the upper end of the moving plate 806.

[0039] Servo motors 802 are installed on the bottom surface inside the protective shell 801. The output shafts of the servo motors 802 pass through the protective shell 801 and the moving plate 806 and are fixedly connected to the universal drive shaft 803. Support rods 805 are fixedly connected to both sides of the upper rear end of the worktable 1. The upper ends of the support rods 805 are fixedly connected to the top plate 4. A compression spring 703 is fixedly connected to the middle of the lower rear end of the moving plate 806. A connecting rod 704 is fixedly connected to the lower end of the compression spring 703. The upper end of the connecting rod 704 is fixedly connected to the moving plate 806. A connecting mechanism 9 is installed at the upper end of the worktable 1. The connecting mechanism 9 includes four connecting cylinders 901 and four elastic clamps 909.

[0040] The upper end of the connecting cylinder 901 is connected to the sleeve 902. The two sides of the lower end of the connecting cylinder 901 are fixedly connected to the rotating shaft 903. The front end and rear end of the outer wall of the rotating shaft 903 are fitted with torsion springs 904. The front end and rear end of the rotating shaft 903 are rotatably connected to the clamping mouth 905. The side of the connecting cylinder 901 away from the center of the worktable 1 is fixedly connected to the fixing block 906. The upper end of the fixing block 906 is rotatably connected to the threaded rod 907. The outer wall of the threaded rod 907 is threadedly connected to the collar 908. The collar 908 is fitted on the elastic clamp 909. The side of the elastic clamp 909 near the center of the worktable 1 is connected to the connecting cylinder 901. The inner wall of the elastic clamp 909 is fixedly connected to multiple friction rings 910.

[0041] A PLC control panel 2 is fixedly connected to one side of the bottom of the outer wall at the front end of the workbench 1. The output shaft of the cylinder 6 passes through the top plate 4 and is fixedly connected to the moving plate 806. The PLC control panel 2 fixedly connected to the workbench 1 allows the operator to control the operating status of the equipment. By having the output shaft of the cylinder 6 pass through the top plate 4 and be fixedly connected to the moving plate 806, the cylinder 6 can drive the moving plate 806 to move up and down along the support rod 805 under the control of the PLC control panel 2. Two connecting blocks 702 are fixedly connected to both sides of the lower end of the adjusting frame 701 by bolts and nuts. The upper end of the outer wall of the sleeve 902 is fixedly connected to the connecting blocks 702 by bolts and nuts. The position of the variable connecting block 702 on the opening in the adjusting frame 701 can change the position of the sleeve 902 on the horizontal plane, thereby adjusting the position of the clamp 905. This allows for adjustment based on the screw hole positions on different workpieces. A screwdriver shank 804 is fixedly connected to the lower end of the universal drive shaft 803. The outer wall of the screwdriver shank 804 is slidably connected to the sleeve 902. The universal drive shaft 803 is fixedly connected to the output shaft of the servo motor 802, ensuring that when the sleeve 902 moves with the screwdriver shank 804, the driving force of the servo motor 802 can still be transmitted to the screwdriver shank 804. The outer wall of the screwdriver shank 804 is slidably connected to the sleeve 902. This allows the screwdriver shank 804 to shift relative to the sleeve 902 when the movable plate 806 moves downward, pressing down the screw and installing it onto the workpiece. The outer wall of the support rod 805 is slidably connected to the movable plate 806 and the adjusting frame 701, while the outer wall of the connecting rod 704 is slidably connected to the adjusting frame 701. By allowing both the movable plate 806 and the adjusting frame 701 to be slidably connected to the support rod 805, and only allowing the adjusting frame 701 to be slidably connected to the connecting rod 704, when the movable plate 806 moves downward, the compression spring 703 applies force to the adjusting frame 701. Simultaneously, the adjusting frame 701 also moves downward to the bolted stop position on the support rod 805 due to gravity. When the screwdriver bar 804 is used to install the screw, the screwdriver bar 806 can be moved down independently to install the screw. When the screwdriver bar 806 moves up, the adjusting frame 701 is driven to move back to the initial position by the retaining ring fixed at the lower end of the connecting rod 704. The side of the torsion spring 904 near the center of the rotating shaft 903 is fixedly connected to the connecting cylinder 901, and the side of the torsion spring 904 away from the center of the rotating shaft 903 is fixedly connected to the clamp 905. The fixed connection between the clamp 905 and the torsion spring 904 allows the connecting cylinder 901 to open when the screw is pushed out by the screwdriver bar 804 and to close automatically after the screw is installed.

[0042] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6The fixture 501 has sliding grooves 502 on both sides of its lower end. A slider 503 is fixedly connected to the middle of the upper end of the worktable 1. A slot 504 is provided in the middle of the inside of the worktable 1. Three return springs 505 are fixedly connected to the bottom surface inside the slot 504. A locking block 506 is fixedly connected to the upper end of each return spring 505. The upper end of the locking block 506 passes through the worktable 1 and is locked to the fixture 501. Pressing blocks 507 are fixedly connected to both sides of the upper end of the outer wall of the front end of the locking block 506.

[0043] The slider 503 is slidably connected to the slide groove 502, and the locking block 506 slides inside the slot 504. The slider 503 fixedly connected to the worktable 1 and the slide groove 502 opened on the fixture 501 are slidably connected, which restricts the left and right movement of the fixture 501. The return spring 505 applies force to the locking block 506, so that the locking block 506 is locked to the fixture 501, which restricts the front and back movement of the fixture 501, thereby fixing the fixture 501 on the worktable 1. When the pressing block 507 is pressed, the locking block 506 moves down in the slot 504, releasing the locking state of the fixture 501, so that the fixture 501 can be removed from the slider 503 for easy disassembly.

[0044] Working Principle: When using this multi-head screwdriver, the operator first supplies power to the equipment via an external power source. Then, by pressing block 507, the locking block 506 moves within the slot 504, releasing the clamping of fixture 501 and allowing it to slide off the slider 503. A new fixture 501 is then slid into the slider 503 via the groove 502. Under the action of the return spring 505, the locking block 506 engages with fixture 501, completing the replacement of fixture 501. The position of connecting block 702 on the opening in adjusting frame 701 is changed using bolts and nuts, altering the position of sleeve 902 on the horizontal plane. The position of clamp 905 is then aligned with the screw hole on the workpiece, completing the position adjustment. Next, the operator inserts the screw delivery tube into the elastic clamp 909. Tighten the threaded rod 907 to move the collar 908 upward, apply force to the elastic clamp 909 and deform it. The friction ring 910 increases the friction between the conveying pipe and the elastic clamp 909, fixing the conveying pipe in place. Finally, the worker places the workpiece on the fixture 501. The cylinder 6 is started through the PLC control panel 2 to move the moving plate 806 downward. Under the action of the compression spring 703, the adjusting frame 701 moves the sleeve 902 downward to above the workpiece. The servo motor 802 is started through the PLC control panel 2 to drive the universal drive shaft 803 to rotate. The screw is pushed out of the connecting sleeve 901 and installed on the workpiece by the screwdriver bar 804. Then the cylinder 6 moves the moving plate 806 upward, and the adjusting frame 701 moves upward to return to its original position under the action of the connecting rod 704, waiting for the next operation.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-head screwing machine comprising a worktable (1), a changing mechanism (5), an adjusting mechanism (7), a driving mechanism (8) and a connecting mechanism (9), characterized in that: The outer wall of the rear end of the workbench (1) is fixedly connected with a side plate (3), the upper end of the outer wall of the front end of the side plate (3) is fixedly connected with a top plate (4), the inside of the workbench (1) is provided with a replacement mechanism (5), the replacement mechanism (5) comprises a jig (501), the middle of the rear end of the upper end of the top plate (4) is provided with an air cylinder (6), the front end of the side plate (3) is provided with an adjusting mechanism (7), the adjusting mechanism (7) comprises an adjusting frame (701), the lower end of the top plate (4) is provided with a driving mechanism (8), the driving mechanism (8) comprises a moving plate (806), the upper end of the moving plate (806) is fixedly connected with four protective shells (801); The bottom surface of the inside of the protective shell (801) is provided with a servo motor (802), the output shaft of the servo motor (802) penetrates the protective shell (801) and the moving plate (806) and is fixedly connected with a universal driving shaft (803), the upper end of the rear end of the workbench (1) is fixedly connected with a support rod (805) on both sides, the upper end of the support rod (805) is fixedly connected with the top plate (4), the middle of the rear end of the lower end of the moving plate (806) is fixedly connected with a compression spring (703), the lower end of the compression spring (703) is fixedly connected with a connecting rod (704), the upper end of the connecting rod (704) is fixedly connected with the moving plate (806), the upper end of the workbench (1) is provided with a connecting mechanism (9), the connecting mechanism (9) comprises four connecting barrels (901) and four elastic clamping barrels (909); The upper end of the connecting barrel (901) is connected with a sleeve (902) in a penetrating manner, the lower end of the connecting barrel (901) is fixedly connected with a rotating shaft rod (903) on both sides, the front end and the rear end of the outer wall of the rod body of the rotating shaft rod (903) are sleeved with a torsional spring (904), the front end and the rear end of the rotating shaft rod (903) are rotatably connected with a clamping nozzle (905), one side of the connecting barrel (901) away from the center of the workbench (1) is fixedly connected with a fixed block (906), the upper end of the fixed block (906) is rotatably connected with a threaded rod (907), the outer wall of the rod body of the threaded rod (907) is threadedly connected with a sleeve ring (908), the sleeve ring (908) is sleeved on the elastic clamping barrel (909), one side of the elastic clamping barrel (909) close to the center of the workbench (1) is connected with the connecting barrel (901) in a penetrating manner, the inner wall of the elastic clamping barrel (909) is fixedly connected with a plurality of friction rings (910).

2. A multi-head screwing machine according to claim 1, characterized in that: Both sides of the lower end of the jig (501) are provided with a sliding groove (502), the upper end of the workbench (1) is fixedly connected with a sliding block (503) in the middle, the middle of the inside of the workbench (1) is provided with a clamping groove (504), the inside bottom surface of the clamping groove (504) is fixedly connected with three reset springs (505), the upper end of the reset spring (505) is fixedly connected with a clamping block (506), the upper end of the clamping block (506) penetrates the workbench (1) and is connected with the jig (501) in a clamping manner, and the upper end of the outer wall of the front end of the clamping block (506) is fixedly connected with a pressing block (507) on both sides.

3. The multi-head screw machine of claim 1, wherein: The PLC control panel (2) is fixedly connected to one side of the front end outer wall of the workbench (1), and the output shaft of the air cylinder (6) penetrates the top plate (4) and is fixedly connected with the moving plate (806).

4. The multi-head screw machine of claim 1, wherein: The two connecting blocks (702) are fixedly connected to the lower end of the adjusting frame (701) on both sides through bolts and nuts, and the outer walls of the upper ends of the sleeves (902) are fixedly connected with the connecting blocks (702).

5. The multi-head screw machine of claim 1, wherein: The screwdriver rods (804) are fixedly connected to the lower ends of the universal driving shafts (803), and the outer walls of the rod bodies of the screwdriver rods (804) are in sliding connection with the sleeves (902).

6. The multi-head screw machine of claim 1, wherein: The outer walls of the rod bodies of the supporting rods (805) are in sliding connection with the moving plates (806) and the adjusting frame (701), and the outer wall of the rod body of the connecting rod (704) is in sliding connection with the adjusting frame (701).

7. The multi-head screw machine of claim 1, wherein: The torsional springs (904) are fixedly connected to the connecting barrels (901) on one side close to the centers of the shaft rods (903), and are fixedly connected to the clamping nozzles (905) on the other side away from the centers of the shaft rods (903).

8. The multi-head screw machine of claim 2, wherein: The sliding block (503) is in sliding connection with the sliding groove (502), and the clamping block (506) slides in the clamping groove (504).

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