Laser welding tool for automatic machining of electronic throttle valve

Abstract

The invention discloses a laser welding tool for automatic machining of an electronic throttle valve, and relates to the technical field of laser welding tools, the laser welding tool comprises a fixed bottom plate, the top end of the fixed bottom plate is provided with an ash falling opening, the middle position of the top end of the fixed bottom plate is provided with a mounting frame, and the front end and the rear end of the top of the fixed bottom plate are both provided with threaded rods; a fan is installed in the middle of the bottom end of the installation frame, and an adjusting mechanism used for adjusting the blowing angle of the fan is arranged on the side of the installation frame. According to the laser welding tool for automatic machining of the electronic throttle valve, a movable block can synchronously drive a movable plate to move when moving, and the movable plate can push a workpiece to the middle position when moving, so that the workpiece to be machined is finally located in the middle position of the top end of a fixed bottom plate; and meanwhile, the clamping plates arranged on the inner sides of the moving plates can buffer and clamp the workpieces through elasticity, so that the workpieces have movement allowance when being clamped, and the surfaces of the workpieces are prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding tooling, and specifically to a laser welding tooling for automated machining of electronic throttle valves. Background Art

[0002] Laser welding tooling utilizes laser welding technology to rapidly melt and connect workpiece materials through a high-energy laser beam. During the production and machining of electronic throttle valves, the laser welding tooling can stably weld the required gear components inside, ensuring the stable use of the subsequent electronic throttle valve. When in use, since traditional laser welding tooling is prone to spatter and residue of debris during the welding of electrical throttle valves, excessive spatter of debris will cause dirt and unevenness on the surface of the welding tooling. When repeatedly welding and machining the electronic throttle valve, excessive debris remaining on the surface will cause the workpiece to be placed unstably, and then the workpiece will deflect at an angle during machining, affecting the stability during overall machining.

[0003] In order to overcome the above defects, Prior Art One (a Chinese patent with publication number CN117961283B and publication date August 13, 2024) is a laser welding tooling for the sector gear of an electronic throttle valve, which includes a bottom column. A centering device is fixedly connected to the top of the bottom column. The centering device includes a square frame plate. Cleaning plate mechanisms are fixedly connected to both the top and bottom of the square frame plate. Pull-back springs are fixedly connected to the four sides of the square frame plate. One end of the pull-back spring away from the square frame plate is fixedly connected to an outer pull rod. One end of the outer pull rod is fixedly connected to an arc-shaped push plate. The surface of the pull-back spring is scraped by an annular scraper to prevent a large amount of debris from adhering to the surface of the pull-back spring exposed outside, which affects the performance of the spring. The area covered by the four arc-shaped push plates is adjusted through the outer pull rod to center electronic throttle valves of different sizes, preventing the situation where it is difficult to uniformly center electronic throttle valves with different sizes to be processed. Prior Art Two (a Chinese patent with publication number CN115570266A and publication date January 6, 2023) is a laser welding tooling for an electronic throttle valve body and a sector gear, which includes a positioning and installation mechanism, a pressing and rotating mechanism, and a base. The positioning and installation mechanism includes a fixture plate, and the fixture plate is fixed on the base. The pressing and rotating mechanism includes a pressing cylinder, a rotating cylinder, and a toothed belt. The pressing cylinder is fixed on the base, the rotating cylinder is arranged on the pressing cylinder, and the toothed belt is connected to the rotating cylinder. The present invention effectively completes the laser welding and assembly of the sector gear assembly of the electronic throttle valve body, ensures the laser welding quality of the sector gear assembly of the electronic throttle valve, improves the stability of the assembly, reduces the ratio of sticking and jamming of the throttle valve body, thereby improving the qualification rate of the product. It can adjust the small angle (0 - 0.3°) of the throttle valve piece to a large angle (4 - 6°), reducing the angle jump during the angle adjustment of the valve piece, thereby improving production efficiency.

[0004] The above-mentioned mechanism fixes the electronic throttle in the middle position by utilizing a clamping mechanism to prevent the center of gravity from shifting due to different sizes. At the same time, the dust on the surface is cleaned to reduce the blockage caused by dust residue. However, in actual use, there will be a lot of debris remaining, and only cleaning the dust and impurities on the surface may cause debris accumulation. Summary of the invention

[0005] The purpose of the present invention is to provide a laser welding tool for automated processing of an electronic throttle valve, so as to solve the problem raised in the above background technology that when a traditional laser welding tool is used to weld an electric throttle valve, debris splashing is prone to remain. Excessive debris splashing will cause the surface of the welding tool to be dirty and uneven. When the electronic throttle valve is repeatedly welded, excessive debris remaining on the surface will cause the workpiece to be placed unsteadily, thereby causing the workpiece to deflect at an angle during processing, affecting the stability of the overall processing.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser welding tool for automated processing of an electronic throttle, comprising a fixed base plate, a ash drop opening is provided at the top of the fixed base plate, a mounting frame is installed at the middle position of the top of the fixed base plate, threaded rods are installed at the front and rear ends of the top of the fixed base plate, and the outer side of the threaded rod is threadedly connected with a movable block, and a movable plate is installed at one end between the movable blocks; the front and rear ends of the movable plate are slidably connected with a guide rod, and a clamping mechanism is provided on the side of the guide rod; a fan is installed at the middle position of the bottom end of the mounting frame, and an adjustment mechanism for adjusting the blowing angle of the fan is provided on the side of the mounting frame, the adjustment mechanism comprises a driving motor, and the driving motor is installed at the upper end of the side of the mounting frame through a fixed frame, a driving gear is installed at the output end of the driving motor, and the front and rear ends of the driving gear are meshed with driven gears, a rotating shaft is installed on the side of the driven gear close to the fan, and a fan blade is fixedly connected to the outer side of the rotating shaft.

[0007] Furthermore, the clamping mechanism includes a clamping plate, and the clamping plate is fixedly connected to the side of the guide rod, the clamping plate is arranged on the side close to the mounting frame, and the other side of the guide rod passes through the movable plate and is installed with a pushing plate.

[0008] Furthermore, a strong spring is wound around the outer side of the guide rod, and an elastic structure is formed between the moving plate and the pushing plate through the strong spring.

[0009] Furthermore, elastic airbags are attached to both left and right sides of the top end of the threaded rod, and an extrusion plate is installed on the side of the elastic airbag, and the positions of the extrusion plate and the propulsion plate correspond to each other.

[0010] Further, the extrusion plate is slidably connected to the fixed bottom plate, and the length of the extrusion plate is less than that of the propulsion plate. The elastic airbag is connected to the clamping plate through a hose, and reserved holes are formed on the surface of the clamping plate.

[0011] Further, the reserved holes are equally spaced on the surface of the clamping plate, and the middle position of the clamping plate is arc-shaped.

[0012] Further, reset springs are welded to both the front and rear ends of the extrusion plate, and an elastic structure is formed between the extrusion plate and the threaded rod through the reset springs. A damper is installed inside the reset spring.

[0013] Further, the fan is arranged at the middle position above the fixed bottom plate, and the clamping plates are arranged on both sides of the fan.

[0014] Further, slide rails are formed at both the front and rear ends of the top of the fixed bottom plate, and a slider matched with the slide rail is fixedly connected to the bottom end of the movable block. A sliding mechanism is formed by the sliding connection between the fixed bottom plate and the movable block through the slider and the slide rail.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The threaded rod is driven to rotate by the motor. When the threaded rod rotates, it is in threaded connection with the external movable block, so that the movable block will move outside the threaded rod. When the movable block moves, it will synchronously drive the moving plate to move. The moving plate will push the workpiece towards the middle position when moving. Since the threaded rod is a bidirectional threaded rod, the speed and distance of the moving plate during movement are consistent, so that the workpiece to be processed will finally be at the middle position of the top of the fixed bottom plate. At the same time, the clamping plate arranged inside the moving plate can elastically buffer and clamp the workpiece, so that the workpiece can have a certain margin of movement when being clamped, avoiding damage to the surface of the workpiece.

[0016] Further, the shape of the clamping plate itself can adapt to different sizes and shapes of the workpiece. The arc at the middle position of the clamping plate can fit with the valve position of the workpiece, facilitating stable clamping. When it is necessary to clamp other positions and the size is large, the flat surfaces at both ends of the clamping plate can be attached to it and stably clamped, increasing the applicability during use.

[0017] Furthermore, when the movable block moves, the slider arranged at the bottom end of the movable block will slide inside the slide rail. By using the limit sliding between the slider and the slide rail, the movable block will not deflect in terms of angle during the process of being driven by the threaded rod to move, so that the movable block can move more smoothly.

[0018] 2. When the clamping plate moves outward to both sides, the guide rod extends to the pushing plate installed on the other side of the moving plate, which will push the extrusion plate, so that the extrusion plate can extrude the elastic airbag. The gas inside the elastic airbag is transported through the hose and into the inside of the clamping plate. The reserved holes opened at the lower end of the clamping plate can eject the gas. And since the reserved holes are evenly distributed at the lower end of the clamping plate, when the gas is ejected, the residual debris at the corners can be blown out and fall below the fixed bottom plate through the ash drop port and into the waste residue collection box, reducing the residue of debris on the surface of the fixed bottom plate. At the same time, it also effectively avoids the situation that the workpiece is not placed flat due to the accumulation of debris on the surface of the fixed bottom plate during subsequent workpiece processing, increasing the overall stability during use.

[0019] Furthermore, the rotation of the fan can cool down the temperature of the workpiece itself and the clamping mechanism, reducing the situation where the surface of the workpiece and the clamping mechanism maintain a high temperature for a long time. At the same time, the output end of the drive motor can drive the driving gear to rotate. When the driving gear rotates, it will drive the driven gear to rotate. The deflection of the angle when the driven gear rotates will synchronously drive the rotating shaft to rotate. When the rotating shaft rotates, it will drive the fan blades to adjust the angle. When the angle of the fan blades is adjusted, the wind blown by the fan will be guided. When the wind is guided, it can not only play a role in cooling the workpiece and the clamping mechanism, but also blow the debris on the surface of the fixed bottom plate to the side, avoiding the accumulation of debris at the middle position of the surface of the fixed bottom plate, thus effectively avoiding the situation that the workpiece is not placed flat and increasing the applicability during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view structural schematic diagram of the present invention.

[0021] Figure 2 It is a front sectional view structural schematic diagram of the present invention.

[0022] Figure 3 It is a top view structural schematic diagram of the clamping mechanism of the present invention.

[0023] Figure 4 It is a partial structural schematic diagram of the clamping mechanism of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the clamping mechanism and the auxiliary dust cleaning mechanism of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the heat dissipation mechanism of the present invention.

[0026] Figure 7 It is a side sectional view structural schematic diagram of the present invention.

[0027] Figure 8This is a partial structural schematic diagram of the heat dissipation mechanism of the present invention.

[0028] Figure 9 This is a schematic diagram of the connection structure between the movable block and the slide rail of the present invention.

[0029] In the figure: 1, fixed bottom plate; 2, dust fall port; 3, threaded rod; 4, movable block; 5, moving plate; 6, clamping plate; 7, guide rod; 8, strong spring; 9, pushing plate; 10, pressing plate; 11, elastic airbag; 12, return spring; 13, reserved hole; 14, mounting frame; 15, fan; 16, driving motor; 17, driving gear; 18, driven gear; 19, rotating shaft; 20, fan blade; 21, slider; 22, slide rail. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1: As Figures 1-5 , Figure 7 and Figure 9 shown in the technical solution, in order to solve the problem that when clamping a workpiece, the center of gravity of the workpiece is likely to shift, resulting in inaccurate position during laser welding and affecting the machining accuracy: The laser welding tooling for automatic machining of electronic throttle discloses a clamping mechanism, including a fixed bottom plate 1, a dust fall port 2 is opened at the top of the fixed bottom plate 1, a mounting frame 14 is installed at the middle position of the top of the fixed bottom plate 1, threaded rods 3 are installed at both the front and rear ends of the top of the fixed bottom plate 1, and a movable block 4 is threadedly connected to the outside of the threaded rod 3. One end between the movable blocks 4 is provided with a moving plate 5; both the front and rear ends of the moving plate 5 are slidably connected to a guide rod 7, and a clamping mechanism is arranged on the side of the guide rod 7; the clamping mechanism includes a clamping plate 6, and the clamping plate 6 is fixedly connected to the side of the guide rod 7. The clamping plate 6 is arranged on the side close to the mounting frame 14. The other side of the guide rod 7 passes through the moving plate 5 and is provided with a pushing plate 9; a strong spring 8 is wound around the outside of the guide rod 7, and an elastic structure is formed between the moving plate 5 and the pushing plate 9 through the strong spring 8; slide rails 22 are opened at both the front and rear ends of the top of the fixed bottom plate 1, and the bottom end of the movable block 4 is fixedly connected with a slider 21 matching the slide rail 22. A sliding mechanism is formed by the sliding connection between the fixed bottom plate 1 and the movable block 4 through the slider 21 and the slide rail 22.

[0032] In this example, the workpiece to be processed is placed at the middle position on the top of the fixed base plate 1, and then the motor drives the threaded rod 3 to rotate. When the threaded rod 3 rotates, it is in threaded connection with the external movable block 4, so that the movable block 4 will move outside the threaded rod 3. When the movable block 4 moves, it will synchronously drive the moving plate 5 to move. The moving plate 5 will push the workpiece towards the middle position when it moves. Since the threaded rod 3 is a bidirectional threaded rod, the speed and distance of the moving plate 5 are kept consistent when it moves, so that the workpiece to be processed will finally be at the middle position on the top of the fixed base plate 1. At the same time, the clamping plate 6 arranged inside the moving plate 5 can buffer and clamp the workpiece elastically, so that the workpiece can have a certain margin of movement when being clamped, avoiding damage to the surface of the workpiece; the strong spring 8 has a large strength and will not vibrate repeatedly and greatly due to the push of the workpiece. The elastically clamped workpiece is subjected to non-contact laser welding, so the clamping of the workpiece will not be deflected due to other acting forces; the shape of the clamping plate 6 itself can adapt to different sizes and shapes of the workpiece. The arc at the middle position of the clamping plate 6 can fit with the valve position of the workpiece, which is convenient for stable clamping. When other positions need to be clamped and the size is large, the planes at both ends of the clamping plate 6 can be attached to it and stably clamped, increasing the applicability during use; when the movable block 4 moves, the slider 21 arranged at the bottom of the movable block 4 will slide inside the slide rail 22. By using the limit sliding between the slider 21 and the slide rail 22, the movable block 4 will not deflect in angle during the process of being driven by the threaded rod 3 to move, and thus the movable block 4 can move more smoothly.

[0033] Embodiment 2: As Figures 1-3 , Figure 5 and Figure 7The technical solution shown is to solve the problem that when the traditional laser welding tooling welds the electric throttle valve, it is easy to have splashing residues of debris. Excessive debris splashing will cause dirt and unevenness on the surface of the welding tooling. When repeatedly welding and processing the electronic throttle valve, excessive residues on the surface will cause the workpiece to be placed unstably, and then the workpiece will deflect at an angle during processing, affecting the stability during the overall processing: The laser welding tooling for automatic processing of the electronic throttle valve discloses an auxiliary dust cleaning mechanism. Elastic air bags 11 are attached to both the left and right sides of the top of the threaded rod 3, and an extrusion plate 10 is installed on the side of the elastic air bag 11. The position of the extrusion plate 10 corresponds to that of the propulsion plate 9; the extrusion plate 10 is slidably connected to the fixed bottom plate 1, and the length of the extrusion plate 10 is less than that of the propulsion plate 9. The elastic air bag 11 is connected to the clamping plate 6 through a hose, and a reserved hole 13 is formed on the surface of the clamping plate 6; the reserved holes 13 are evenly distributed on the surface of the clamping plate 6, and the middle position of the clamping plate 6 is arc-shaped; both the front and rear ends of the extrusion plate 10 are welded with a return spring 12, and the extrusion plate 10 and the threaded rod 3 form an elastic structure through the return spring 12. A damper is installed inside the return spring 12.

[0034] In this example, when the clamping plate 6 moves outward to both sides, the guide rod 7 extends to the pushing plate 9 installed on the other side of the moving plate 5, which will push the extrusion plate 10, so that the extrusion plate 10 can extrude the elastic airbag 11. The gas inside the elastic airbag 11 passes through the hose and is delivered to the inside of the clamping plate 6. The reserved holes 13 opened at the lower end of the clamping plate 6 can eject the gas. And because the reserved holes 13 are evenly distributed at the lower end of the clamping plate 6, when the reserved holes 13 eject gas, the debris remaining at the corners can be blown out and fall below the fixed bottom plate 1 through the dust falling port 2 and into the waste residue collection box, reducing the residue of debris on the surface of the fixed bottom plate 1. At the same time, it also effectively avoids the situation that the workpiece is not placed flat during subsequent workpiece processing due to the accumulation of debris on the surface of the fixed bottom plate 1, increasing the overall stability during use. When blowing air to remove debris, while the clamping plate 6 is moving synchronously, it will push the larger pieces of debris to move, so that the larger pieces of debris will fall from the dust falling port 2 and be collected by the waste residue collection box, so that debris of different sizes on the surface of the fixed bottom plate 1 can be cleaned thoroughly and the residue is reduced; both the front and rear ends of the extrusion plate 10 are connected to the fixed bottom plate 1 through the return springs 12. Therefore, after the extrusion plate 10 is extruded, it will be reset in position by the elastic force of the return spring 12 itself. And because a damper is provided inside the return spring 12, the extrusion plate 10 will achieve stable reset without repeated shaking. When the extrusion plate 10 is reset, the air inlet provided on the elastic airbag 11 will slowly intake air, and a one-way valve is provided at the air inlet of the elastic airbag 11, so as to avoid the situation that the elastic airbag 11 sucks the gas back from the reserved hole 13. And a one-way valve is provided at the hose connecting the elastic airbag 11 and the reserved hole 13 to avoid the situation that impurities enter the clamping plate 6 through the reserved hole 13 due to gas backflow.

[0035] Embodiment 3: As Figure 1 , Figure 2 and Figures 6-8The shown technical solution is to solve the problems that during laser welding, the temperature of the workpiece rises due to the welding temperature, and at the same time, the temperature conduction causes the temperature of the clamping mechanism to rise, which in turn leads to the workpiece being maintained at a high temperature for a long time, affecting its service life. At the same time, the blowing direction of the traditional heat dissipation component is fixed and cannot be adjusted, resulting in some debris remaining at the edge and not being thoroughly cleaned: This laser welding tooling for the automated processing of electronic throttle discloses an adjusting mechanism. A blower 15 is installed at the middle position of the bottom end of the mounting frame 14, and an adjusting mechanism for adjusting the blowing angle of the blower 15 is arranged on the side of the mounting frame 14. The adjusting mechanism includes a driving motor 16, and the driving motor 16 is installed at the upper end of the side of the mounting frame 14 through a fixing frame. The output end of the driving motor 16 is installed with a driving gear 17, and driven gears 18 are engaged at both the front and rear ends of the driving gear 17. A rotating shaft 19 is installed on the side of the driven gear 18 close to the blower 15, and a fan blade 20 is fixedly connected to the outer side of the rotating shaft 19; The blower 15 is arranged at the middle position above the fixed bottom plate 1, and the clamping plates 6 are arranged on both sides of the blower 15.

[0036] In this example, the rotation of the blower 15 can cool down the temperature of the workpiece itself and the clamping mechanism, reducing the situation where the surface of the workpiece and the clamping mechanism are maintained at a high temperature for a long time. At the same time, the output end of the driving motor 16 can drive the driving gear 17 to rotate. When the driving gear 17 rotates, it will drive the driven gear 18 to rotate. The deflection of the angle during the rotation of the driven gear 18 will synchronously drive the rotating shaft 19 to rotate, and the rotating shaft 19 will drive the fan blade 20 to adjust the angle during rotation. When the angle of the fan blade 20 is adjusted, the wind blown by the blower 15 will be deflected. When the wind is deflected, it can not only play a role in cooling the workpiece and the clamping mechanism, but also blow the debris on the surface of the fixed bottom plate 1 to both sides, avoiding the accumulation of debris at the middle position of the surface of the fixed bottom plate 1, thus effectively avoiding the situation of uneven placement of the workpiece and increasing the applicability during use.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser welding tool for automated processing of an electronic throttle, comprising a fixed base plate (1), a dust drop opening (2) being provided at the top of the fixed base plate (1), a mounting frame (14) being installed at the middle position of the top of the fixed base plate (1), threaded rods (3) being installed at both the front and rear ends of the top of the fixed base plate (1), and movable blocks (4) being threadedly connected to the outer sides of the threaded rods (3), and a movable plate (5) being installed at one end between the movable blocks (4); Features: The front and rear ends of the movable plate (5) are slidably connected to guide rods (7), and a clamping mechanism is provided on the side of the guide rod (7); A fan (15) is installed at a middle position at the bottom end of the mounting frame (14), and an adjustment mechanism for adjusting the blowing angle of the fan (15) is arranged on the side of the mounting frame (14), the adjustment mechanism comprising a drive motor (16), and the drive motor (16) is installed on the upper end of the side of the mounting frame (14) through a fixing frame, a driving gear (17) is installed at the output end of the drive motor (16), and the front and rear ends of the driving gear (17) are meshed with driven gears (18), and a rotating shaft (19) is installed on the side of the driven gear (18) close to the fan (15), and a fan blade (20) is fixedly connected to the outer side of the rotating shaft (19).

2. The laser welding tool for automated processing of electronic throttle valve according to claim 1, characterized in that: The clamping mechanism comprises a clamping plate (6), and the clamping plate (6) is fixedly connected to the side of the guide rod (7), the clamping plate (6) is arranged on a side close to the mounting frame (14), and the other side of the guide rod (7) passes through the moving plate (5) and is installed with a pushing plate (9).

3. The laser welding tool for automated processing of electronic throttle valve according to claim 2, characterized in that: A strong spring (8) is wound around the outer side of the guide rod (7), and an elastic structure is formed between the moving plate (5) and the pushing plate (9) through the strong spring (8).

4. The laser welding tool for automated processing of electronic throttle valve according to claim 3 is characterized in that: Elastic airbags (11) are attached to both left and right sides of the top end of the threaded rod (3), and an extrusion plate (10) is installed on the side of the elastic airbag (11), and the positions of the extrusion plate (10) and the propulsion plate (9) correspond to each other.

5. The laser welding tool for automated processing of electronic throttle valve according to claim 4, characterized in that: The extrusion plate (10) is slidably connected to the fixed base plate (1), and the length of the extrusion plate (10) is less than the length of the propulsion plate (9). The elastic airbag (11) is connected to the clamping plate (6) via a hose, and a reserved hole (13) is provided on the surface of the clamping plate (6).

6. The laser welding tool for automated processing of electronic throttle valve according to claim 5, characterized in that: The reserved holes (13) are distributed at equal intervals on the surface of the clamping plate (6), and the middle position of the clamping plate (6) is arc-shaped.

7. The laser welding tool for automated processing of electronic throttle valve according to claim 6, characterized in that: Return springs (12) are welded to both the front and rear ends of the extrusion plate (10), and an elastic structure is formed between the extrusion plate (10) and the threaded rod (3) via the return spring (12), and a damper is installed inside the return spring (12).

8. The laser welding tool for automated processing of electronic throttle valve according to claim 7, characterized in that: The fan (15) is arranged at a middle position above the fixed bottom plate (1), and the clamping plates (6) are arranged on both sides of the fan (15).

9. The laser welding tool for automated processing of electronic throttle valve according to claim 8, characterized in that: The front and rear ends of the top of the fixed base plate (1) are both provided with slide rails (22), and the bottom end of the movable block (4) is fixedly connected with a slider (21) matching the slide rail (22), and the fixed base plate (1) and the movable block (4) are slidably connected via the slider (21) and the slide rail (22) to form a sliding mechanism.

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