A kind of fixture structure of quick replacement of printer silk screen machine

Abstract

The utility model discloses a kind of fixture structures of printer silk screen machine quick replacement, it is related to fixture technical field, including first bearing frame, first fixed frame, first screw rod, first spring and limit block;Lifting mechanism is provided on the first bearing frame top, the lifting mechanism includes second screw rod, second fixed frame, swing angle plate, guide slot, third fixed frame, sliding block, guide rail and bearing, the second fixed frame, third fixed frame are respectively arranged in guide rail both sides, the second screw rod is installed in the top of fixed frame, third fixed frame, the sliding block is installed in the side of second screw rod, the guide slot is arranged in swing angle plate side edge, and the second screw rod between third fixed frame and second fixed frame is connected with sliding block screw thread, rotation motion is converted into sliding block linear motion, torque loss is small to accurately control first bearing frame lifting height.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to a quick-change fixture structure for a printer screen printer. Background Technology

[0002] The quick-change fixture for printer screen printing machines is a workpiece fixing device used in printer screen printing machines. Through multi-component collaborative design, it achieves quick fixture changes, precise positioning, and stable operation. However, existing workpiece fixing devices have some shortcomings, such as:

[0003] The screen plate fixing clamp of the running table screen printing machine described in application number CN201220465055.6 adopts a four-bar linkage mechanism, which is convenient and labor-saving to use, and can better clamp the screen plate of the running table screen printing machine to prevent it from shifting. It also makes it convenient for users to replace the screen plate, thus ensuring the fixing effect and improving production efficiency and printing quality.

[0004] However, the equipment focuses only on fixing and replacing the screen, and its fixing components only adjust the vertical position of the fixing plate by screws. When facing complex scenarios such as curved substrates or multi-color printing, it cannot correct the printing trajectory through angle compensation, which makes the fixture only suitable for the single working condition of flat screens. Utility Model Content

[0005] The purpose of this utility model is to provide a quick-change fixture structure for printer screen printing machines, in order to solve the problem mentioned in the background art that the existing equipment on the market only focuses on fixing and replacing the screen, and its fixing components only adjust the vertical position of the fixing plate by screws. When facing complex scenarios such as curved substrates or multi-color printing, it is impossible to correct the printing trajectory through angle compensation, resulting in the fixture being only suitable for single working conditions of flat screens.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a quick-change fixture structure for a printer screen printing machine, comprising a first support frame, a first fixing frame, a first screw, a first spring, and a limiting block;

[0007] A lifting mechanism is provided above the first support frame. The lifting mechanism includes a second screw, a second fixed frame, a swing plate, a guide groove, a third fixed frame, a slider, a guide rail, and a bearing. The second fixed frame and the third fixed frame are respectively located on both sides of the guide rail. The second screw is installed above the fixed frame and the third fixed frame. The slider is installed on one side of the second screw. The guide groove is located on the side of the swing plate. The bearing is located on both sides of the slider. The slider is installed inside the guide groove of the swing plate through the bearing.

[0008] As a preferred technical solution of this utility model, the first support frame is slidably connected to the right side of the first fixed frame, the upper part of the first fixed frame is a T-shaped structure, and a cone head is slidably connected to the upper part of the first fixed frame, and a first spring is clamped between the cone head and the first fixed frame.

[0009] Using the above technical solution, the upper part of the first fixed frame slidably connected to the right side of the first support frame is a T-shaped structure. A first spring is clamped between the cone head slidably connected above the first fixed frame and the first fixed frame. During fixture installation, the elastic deformation of the first spring can automatically tighten the cone head, completing the initial positioning without additional tools, shortening the installation time. At the same time, the buffering effect of the first spring can reduce the damage to the fixture or equipment caused by rigid collisions during installation. In addition, by rotating the first screw to adjust the position of the first fixed frame, the clamping force and position of the cone head can be adjusted, so that the fixture structure can adapt to workpieces of different thicknesses or shapes, improving versatility.

[0010] As a preferred technical solution of this utility model, the fourth fixing frame is fixed to the left side of the first support frame with bolts, the motor is fixedly connected to the left side of the fourth fixing frame, and the output shaft of the motor is threadedly connected to the sleeve on the right side. The lower part of the first support frame has a right-angled U-shaped structure.

[0011] Using the above technical solution, the fourth fixed frame, which is bolted to the left side of the first support frame, is fixedly connected to the motor on the left side. The output shaft of the motor is threadedly connected to the sleeve. Driven by the motor, the sleeve can move axially along the output shaft, realizing precise and rapid adjustment of the fixture support position. Compared with traditional manual adjustment, this can improve production efficiency. The lower part of the first support frame has a right-angled U-shaped structure, which increases the contact area with the bottom support surface. Together with the bolted fourth fixed frame, it can effectively distribute the weight of the fixture and workpiece, reduce the shaking of the equipment during operation, and enhance the stability of the overall structure.

[0012] As a preferred technical solution of this utility model, the first support frame is rotatably connected to the pipe seat below, the second support frame is clamped below the pipe seat, and there are two pipe seats symmetrically distributed. The first support frame is fixedly connected to the lower part of the swing angle plate, and the surface of the swing angle plate is provided with a guide groove.

[0013] Using the above technical solution, the first support frame is rotatably connected to two symmetrically distributed tube seats at its lower part, and the second support frame is clamped under the tube seats. A guide groove is opened on the surface of the swing plate fixedly connected to the lower part of the first support frame. When the lifting mechanism is working, the slider moves and drives the swing plate to swing through the bearing, so that the first support frame can be tilted or lifted at a certain angle, which is convenient for operators to load and unload the fixture from different angles, especially suitable for installation scenarios with limited space. The two symmetrically distributed tube seats can evenly bear the weight of the first support frame, avoiding structural displacement due to unilateral force, ensuring that the fixture remains horizontal after installation, and ensuring the accuracy of the screen printing process.

[0014] As a preferred technical solution of this utility model, a third fixing frame is bolted to the top of the second support frame. The third fixing frame has a T-shaped structure, and the second support frame and the second fixing frame are bolted to the symmetrical position of the third fixing frame. A first guide block is fixedly connected between the third fixing frame and the second fixing frame.

[0015] Using the above technical solution, the third fixed frame bolted above the second support frame is a T-shaped structure. The second support frame and the second fixed frame are bolted to each other at the symmetrical position of the third fixed frame, and the first guide block is fixedly connected between the third fixed frame and the second fixed frame to form a stable triangular support structure. This enhances the rigidity of the lifting mechanism and prevents jamming caused by deformation due to force when the slider moves. The first guide block provides linear guidance for the slider's sliding. When used in conjunction with the guide rail, the slider's movement error can be controlled within a small range, ensuring the smoothness and accuracy of the lifting mechanism's operation.

[0016] As a preferred technical solution of this utility model, a slider is slidably connected above the first guide block, bearings are fitted on both sides of the slider, and the bearings are slidably connected to the swing plate through the guide groove. A second screw is rotatably connected between the third fixing frame and the second fixing frame, and the second screw is threadedly connected to the slider.

[0017] Using the above technical solution, bearings are mounted on both sides of the slider that is slidably connected above the first guide block. The bearings are slidably connected to the swing plate through the guide groove. The second screw, which is rotatably connected between the third fixed frame and the second fixed frame, is threadedly connected to the slider. Through the transmission of the second screw, the rotational motion can be converted into the linear motion of the slider. The torque loss is small, and the movement distance of the slider can be precisely controlled, thereby accurately adjusting the lifting height of the first support frame. The slider is slidably connected to the guide groove of the swing plate through the bearing, which converts sliding friction into rolling friction, reduces motion resistance, makes the lifting process smoother, reduces component wear, and extends the service life of the equipment.

[0018] As a preferred technical solution of this utility model, a limiting block is fixedly connected below the first support frame, the side of the limiting block is rotatably connected to the first screw, and the first screw is threadedly connected to the first fixed frame;

[0019] Using the above technical solution, the side of the limiting block fixedly connected to the lower part of the first support frame is rotatably connected to the first screw, and the first screw is threadedly connected to the first fixed frame. When the first fixed frame moves to the set position, the limiting block can prevent it from moving excessively, thus playing a safety protection role. By rotating the first screw, the position of the first fixed frame can be finely adjusted, realizing micro-control of the clamping force of the cone head and ensuring the stability of the fixture after installation. This design occupies little space, and the operator can complete the adjustment with a simple rotation action without complicated tools, which improves the convenience of equipment maintenance.

[0020] As a preferred technical solution of this utility model, the output shaft on the right side of the motor is fixedly connected to the shaft member, and the shaft member has a hexagonal structure. A bushing is fitted on the right side of the shaft member. The right side of the bushing has a tapered structure. A second spring is fitted on one side of the bushing. A sliding sleeve is threaded to the other side of the bushing. A tube sleeve is slidably connected inside the bushing. A nozzle is slidably connected above the first fixed frame. A first spring is clamped between the nozzle and the first fixed frame. A cone head is threaded to the left side of the nozzle.

[0021] Using the above technical solution, the hexagonal shaft fixed to the output shaft on the right side of the motor can improve the stability of torque transmission and prevent slippage; the tapered bushing fitted on the right side of the shaft facilitates guidance and positioning, shortens assembly time, and the second spring on one side can buffer impact and reduce wear, while the threaded sliding sleeve on the other side can adjust the clamping force. The sliding connection between the bushing and the sleeve reduces friction; the top nozzle piece slidably connected above the first fixed frame has a threaded cone head on the left side, which facilitates the replacement of different cone heads to meet diverse needs. The first spring between the top nozzle piece and the first fixed frame can adaptively adjust the clamping force. The overall structure improves adjustment accuracy, assembly efficiency, and component life, and enhances versatility.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. The first fixed frame, which is slidably connected to the right side of the first support frame, works with the cone head and the first spring. During installation, the cone head can be automatically tightened by the elastic deformation of the first spring, allowing for initial positioning without tools and shortening the time. The first spring also provides cushioning and reduces collision damage. At the same time, rotating the first screw adjusts the position of the first fixed frame, which can adjust the tightening force and position of the cone head to adapt to different workpieces and improve versatility. The fourth fixed frame, which is bolted to the left side of the first support frame, is connected to the motor. The sleeve threaded to the motor output shaft can be moved axially by the motor to achieve precise and rapid adjustment of the fixture support position. The right-angled U-shaped structure below the first support frame increases the contact area with the bottom support surface and, together with the fourth fixed frame, distributes the weight, reducing equipment shaking and enhancing stability.

[0024] 2. The lifting mechanism is linked by components such as the second screw, slider, and swing plate. When the second screw rotates, the slider moves on the guide rail, and the bearings on both sides slide in the guide groove of the swing plate, causing the swing plate to swing and lift or tilt the first support frame, which facilitates loading and unloading of the fixture from different angles. The two symmetrically distributed tube seats rotate to connect the first support frame and the second support frame, which can evenly bear the weight to avoid structural displacement and ensure screen printing accuracy. The third fixed frame, which is bolted on the top of the second support frame, is connected to the second fixed frame through the first guide block to form a triangular support structure to enhance the rigidity of the lifting mechanism and prevent the slider from deforming and jamming when moving. The first guide block cooperates with the guide rail to provide linear guidance for the slider, reduce movement error and ensure smooth and accurate operation.

[0025] 3. The optimized screw drive and bearing design improve motion accuracy and efficiency. The second screw between the third and second fixed frames is threadedly connected to the slider, converting rotational motion into linear motion of the slider. This minimizes torque loss and allows for precise control of the lifting height of the first support frame. The slider is slidably connected to the guide groove of the swing plate via bearings, converting sliding friction into rolling friction, reducing resistance and ensuring smooth lifting, while also reducing component wear and extending service life. The combination design of the limit block and the first screw prevents excessive movement of the first fixed frame during movement, providing safety protection. Rotating the first screw allows for precise adjustment of the position of the first fixed frame, enabling micro-control of the cone head clamping force to ensure the stability of the clamp. This design also occupies little space; operators can adjust it simply by rotating the screw, eliminating the need for complex tools and improving maintenance convenience.

[0026] 4. The overall structure, through the design of elastic buffer, precise guidance and limit adjustment, realizes quick loading and unloading and stable clamping of the fixture. Compared with the traditional structure, it not only reduces the number of tool changes and steps and shortens downtime, but also improves the adjustment accuracy through motor drive and screw transmission, and enhances the stability of operation through symmetrical support and rigid structure, making it suitable for the high-efficiency production needs of printer screen printing machines. Attached Figure Description

[0027] Figure 1 This is a side view of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the second screw and the second fixing frame structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the motor and the fourth fixing frame of this utility model;

[0030] Figure 4 This is a schematic diagram of the guide rail and bearing structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the first fixing frame and the first screw structure of this utility model;

[0032] Figure 6 This is a side view of the structure of Embodiment 2 of this utility model;

[0033] Figure 7 This is a schematic diagram of the second spring and bushing structure of this utility model;

[0034] Figure 8 This is a schematic diagram of the fourth fixing frame and tube sleeve structure of this utility model;

[0035] Figure 9 This is a side view of the top nozzle component of this utility model.

[0036] In the diagram: 1. First support frame; 2. First fixed frame; 3. First screw; 4. First spring; 5. Cone head; 6. Second screw; 7. Second fixed frame; 8. First guide block; 9. Second support frame; 10. Swing plate; 11. Tube seat; 12. Guide groove; 13. Third fixed frame; 14. Motor; 15. Fourth fixed frame; 16. Tube sleeve; 17. Slider; 18. Guide rail; 19. Bearing; 20. Limiting block; 21. Top nozzle; 22. Sliding sleeve; 23. Second spring; 24. Bushing; 25. Shaft. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figure 1 - Figure 9 The present invention provides a quick-change fixture structure for a printer / screen printer.

[0039] Example 1

[0040] For details, please refer to the following: Figure 1 - Figure 5 It includes a first support frame 1, a first fixed frame 2, a first screw 3, a first spring 4, a cone head 5, a second screw 6, a second fixed frame 7, a first guide block 8, a second support frame 9, a swing plate 10, a pipe seat 11, a guide groove 12, a third fixed frame 13, a motor 14, a fourth fixed frame 15, a pipe sleeve 16, a slider 17, a guide rail 18, a bearing 19, and a limiting block 20;

[0041] The lifting mechanism above the first support frame 1 is centered on the second screw 6, which is installed above the second fixed frame 7 and the third fixed frame 13. The two fixed frames are distributed on both sides of the guide rail 18. The slider 17 is connected to the second screw 6. The bearings 19 on both sides are embedded in the guide groove 12 of the swing plate 10. When the second screw 6 rotates, the slider 17 drives the swing plate 10 to swing, thereby lifting or adjusting the angle of the first support frame 1.

[0042] The first fixed frame 2, which is slidably connected to the right side of the first support frame 1, has a T-shaped structure on top. A first spring 4 is sandwiched between the first fixed frame 2 and the cone head 5. During installation, the elastic deformation of the first spring 4 causes the cone head 5 to automatically tighten and complete the initial positioning. Rotating the first screw 3 can adjust the position of the first fixed frame 2 and adjust the tightening force and position of the cone head 5 to adapt to different workpieces.

[0043] The first support frame 1 has a motor 14 fixed on the left side by a fourth fixing frame 15. The output shaft of the motor 14 is threadedly connected to the sleeve 16, which drives the sleeve 16 to move axially, thereby adjusting the position of the clamp support. The right-angled U-shaped structure below the first support frame 1 increases the contact area with the bottom support surface and enhances the structural stability.

[0044] The first support frame 1 is rotatably connected to two symmetrical tube seats 11 below. The second support frame 9 is clamped below the tube seats 11. The surface of the swing plate 10 below the first support frame 1 has a guide groove 12. When the lifting mechanism is working, the slider 17 drives the swing plate 10 to swing, so that the first support frame 1 is tilted or lifted, which facilitates the loading and unloading of the fixture. The symmetrical tube seats 11 bear the weight evenly, ensuring the accuracy of screen printing.

[0045] The third fixed frame 13, which is T-shaped, is bolted above the second support frame 9. Its symmetrical position is bolted to the second fixed frame 7. The first guide block 8 is fixed between the two to form a triangular support structure, which enhances the rigidity of the lifting mechanism. The first guide block 8 provides linear guidance for the slider 17 to ensure that the lifting mechanism moves smoothly.

[0046] The slider 17 is slidably connected to the first guide block 8, the bearings 19 on both sides are slidably connected to the guide groove 12, and the second screw 6 is threadedly connected to the slider 17. The lifting height of the first support frame 1 is precisely controlled by the transmission of the second screw 6. The bearing 19 converts sliding friction into rolling friction, reducing resistance and reducing component wear.

[0047] The limiting block 20 below the first support frame 1 is rotatably connected to the first screw 3. The first screw 3 is threadedly connected to the first fixed frame 2. The limiting block 20 prevents the first fixed frame 2 from moving excessively. Rotating the first screw 3 can finely adjust the position of the first fixed frame 2, ensuring that the fixture is installed stably and is easy to adjust.

[0048] Example 2

[0049] For details, please refer to the following: Figure 6 - Figure 9 The difference between this embodiment and embodiment one is that: the output shaft on the right side of the motor 14 is fixedly connected to the shaft 25, and the shaft 25 is a hexagonal structure. The shaft 25 is fitted with a bushing 24 on the right side. The right side of the bushing 24 is a tapered structure. A second spring 23 is fitted on one side of the bushing 24. The other side of the bushing 24 is threadedly connected to a sliding sleeve 22. The bushing 24 is slidably connected to a tube sleeve 16. The top nozzle 21 is slidably connected above the first fixed frame 2. A first spring 4 is sandwiched between the top nozzle 21 and the first fixed frame 2. The left side of the top nozzle 21 is threadedly connected to a cone head 5.

[0050] The hexagonal shaft 25 fixed to the output shaft on the right side of the motor 14 can improve the stability of torque transmission and prevent slippage; the tapered bushing 24 fitted on the right side of the shaft 25 facilitates guidance and positioning, shortens assembly time, and the second spring 23 on one side can buffer impact and reduce wear, while the threaded sliding sleeve 22 on the other side can adjust the clamping force. The sliding connection between the bushing 24 and the sleeve 16 reduces friction; the top nozzle 21 slidably connected above the first fixed frame 2 has a threaded cone 5 on its left side, which facilitates the replacement of different cones 5 to meet various needs. The first spring 4 between the top nozzle 21 and the first fixed frame 2 can adaptively adjust the clamping force. The overall structure improves the adjustment accuracy, assembly efficiency and component life, and enhances versatility.

[0051] Working principle: When using a quick-change fixture structure for a printer screen printing machine, the lifting mechanism above the first support frame 1 uses the second screw 6 as the power core. The second fixed frame 7 and the third fixed frame 13 are symmetrically installed on both sides of the guide rail 18 to provide support for the second screw 6. When the second screw 6 is driven to rotate by hand, the slider 17, which is threaded to the second screw 6, moves linearly along the guide rail 18. The bearings 19 on both sides of the slider 17 are embedded in the guide grooves 12 on the side of the swing plate 10. As the slider 17 moves, the bearings 19 slide in the guide grooves 12, causing the swing plate 10 to swing, thereby enabling the first support frame 1 to be lifted or its angle adjusted.

[0052] The first fixed frame 2 on the right side of the first support frame 1 is slidably connected to the cone head 5, and the first spring 4 is sandwiched between the two. When the clamp is installed, the elastic deformation of the first spring 4 pushes the cone head 5 to automatically press against the clamp, completing the initial positioning. Rotating the first screw 3 can adjust the position of the first fixed frame 2, thereby adjusting the pressing force and position of the cone head 5 to adapt to clamps of different sizes and ensure stable installation.

[0053] The first support frame 1 is rotatably connected to the second support frame 9 via two symmetrically distributed tube seats 11. The surface of the swing plate 10 fixed below the first support frame 1 has a guide groove 12. When the lifting mechanism is working, the swing plate 10 swings to drive the first support frame 1 to tilt or lift, which makes it easy for the operator to load and unload the fixture from different angles. The third fixed frame 13 above the second support frame 9 is connected to the second fixed frame 7 via the first guide block 8 to form a stable triangular support structure, which provides linear guidance for the slider 17 and ensures that the lifting mechanism moves smoothly and accurately.

[0054] The limiting block 20 fixed below the first support frame 1 is rotatably connected to the first screw 3. The first screw 3 is threadedly connected to the first fixed frame 2. When the first fixed frame 2 moves to the set position, the limiting block 20 prevents it from moving excessively, thus playing a safety protection role. By rotating the first screw 3, the position of the first fixed frame 2 can be finely adjusted, thereby achieving micro-control of the clamping force of the cone head 5 and ensuring the stability of the fixture after installation.

[0055] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick-change fixture structure for a printer screen printing machine, comprising a first support frame (1), a first fixing frame (2), a first guide block (8), a second support frame (9), and a motor (14); characterized in that: A lifting mechanism is provided above the first support frame (1). The lifting mechanism includes a second screw (6), a second fixed frame (7), a swing plate (10), a guide groove (12), a third fixed frame (13), a slider (17), a guide rail (18), and a bearing (19). The second fixed frame (7) and the third fixed frame (13) are respectively located on both sides of the guide rail (18). The second screw (6) is installed above the fixed frame (7) and the third fixed frame (13). The slider (17) is installed on one side of the second screw (6). The guide groove (12) is located on the side of the swing plate (10). The bearing (19) is located on both sides of the slider (17). The slider (17) is installed inside the guide groove (12) of the swing plate (10) through the bearing (19).

2. The quick-change fixture structure for a printer / screen printing machine according to claim 1, characterized in that, The first support frame (1) is slidably connected to the first fixed frame (2) on the right side. The first fixed frame (2) has a T-shaped structure on top and a cone (5) is slidably connected on top of the first fixed frame (2). A first spring (4) is sandwiched between the cone (5) and the first fixed frame (2).

3. The quick-change fixture structure for a printer / screen printing machine according to claim 1, characterized in that, The first support frame (1) is bolted to the left side of the fourth fixed frame (15), the fourth fixed frame (15) is fixedly connected to the left side of the motor (14), and the output shaft of the motor (14) is threadedly connected to the sleeve (16). The first support frame (1) has a right-angled U-shaped structure below it.

4. The quick-change fixture structure for a printer / screen printing machine according to claim 1, characterized in that, The first support frame (1) is rotatably connected to the tube seat (11) below. The second support frame (9) is clamped below the tube seat (11), and there are two tube seats (11) symmetrically distributed. The first support frame (1) is fixedly connected to the lower part of the swing plate (10), and the surface of the swing plate (10) is provided with a guide groove (12).

5. The quick-change fixture structure for a printer / screen printing machine according to claim 1, characterized in that, The third fixing frame (13) is bolted above the second support frame (9). The third fixing frame (13) is a T-shaped structure. The second support frame (9) and the second fixing frame (7) are bolted to the third fixing frame (13) at symmetrical positions. The first guide block (8) is fixedly connected between the third fixing frame (13) and the second fixing frame (7).

6. The quick-change fixture structure for a printer / screen printing machine according to claim 1, characterized in that, A slider (17) is slidably connected above the first guide block (8). Bearings (19) are fitted on both sides of the slider (17), and the bearings (19) are slidably connected to the swing plate (10) through the guide groove (12). A second screw (6) is rotatably connected between the third fixed frame (13) and the second fixed frame (7), and the second screw (6) is threadedly connected to the slider (17). A limiting block (20) is fixedly connected below the first support frame (1). The side of the limiting block (20) is rotatably connected to the first screw (3), and the first screw (3) is threadedly connected to the first fixed frame (2).

7. The quick-change fixture structure for a printer / screen printing machine according to claim 1, characterized in that, The output shaft on the right side of the motor (14) is fixedly connected to the shaft (25), and the shaft (25) is a hexagonal structure. The right side of the shaft (25) is fitted with a bushing (24), and the right side of the bushing (24) is a tapered structure. A second spring (23) is fitted on one side of the bushing (24), and a sliding sleeve (22) is threaded on the other side of the bushing (24). A tube sleeve (16) is slidably connected inside the bushing (24). A nozzle (21) is slidably connected above the first fixing frame (2). A first spring (4) is sandwiched between the nozzle (21) and the first fixing frame (2). A cone (5) is threadedly connected to the left side of the nozzle (21).

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