CN112123788A - Production facility that has rotation function for welding of car working of plastics - Google Patents

Abstract

The invention discloses a production equipment with rotation function for welding of automobile plastic parts, comprising a bottom case, a support frame is symmetrically arranged on the upper surface of the bottom case, and the top of the support frame is arranged inside the four corners of the top plate, and the bottom The upper surface of the chassis is provided with a workbench, and a driven shaft is installed in the center of the workbench, a second driven gear is set above the driven shaft, and a base is installed on the surface of the bottom chassis on the left side of the workbench , and a robotic arm is connected above the base, and a laser welding head is arranged inside the right side of the robotic arm. In the present invention, a clamping mechanism and a fixing mechanism are arranged on the upper part of the working table, and the setting of the fixing mechanism is convenient for The position of the panel is fixed to avoid position movement during welding. At the same time, through the setting of the clamping structure, it is convenient to clamp the hook and avoid using external tools to clamp the hook, which is beneficial to the stability of the welding surface between the panel and the hook. .

Description

A production equipment with rotating function for welding of automobile plastic parts

technical field

The invention relates to the technical field of automobile welding, in particular to a production equipment with a rotating function for welding automobile plastic parts.

Background technique

The auto body components are mainly made of cold-rolled steel plate stamping parts with good stamping and welding process, which are assembled and welded. The welding production batch is large, the production speed is fast, and the welding accuracy of the parts to be welded is high. The production method has a high degree of mechanization and automation. A large number of special equipment and fixtures are used. More and more welding work is completed by automatic welding machines and welding robots. The resistance heat generated when the current passes through the workpiece is used to heat the workpiece for welding. Welding includes: spot welding, seam welding, projection welding, butt welding.

In order to facilitate the easy access of the fuel tank cover when the car is refueling, a fixed hook will be installed on the outer panel and an elastic rope will be installed, so that the elastic rope can be hung on the panel when the fuel tank cover is unscrewed, which is usually hand welded by the master. The size of the hook parts is relatively small. When the master is operating, the hook parts are usually fixed by means of fixtures, so the welding operation is not very convenient. The utility model relates to a production equipment with a rotating function for the welding of automobile plastic parts.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a production equipment with a rotating function for the welding of automobile plastic parts, so as to solve the problem of installing a fixing hook on the outer side panel and installing an elastic rope, which is convenient to unscrew the fuel tank cap. On the panel, it is usually welded manually by the master, and because the size of the hook parts is relatively small, the hook parts are usually fixed by a clamp when the master is operating, so the welding operation is not very convenient, and it is more likely to be caused by inaccurate welding positions. It is counterproductive that the outer panel cannot be closed and other problems.

In order to achieve the above purpose, the present invention provides the following technical solutions: a production equipment with a rotating function for welding of automobile plastic parts, comprising a bottom case, the upper surface of the bottom case is symmetrically provided with a support frame, and the top of the support frame is arranged on the Inside the four corners of the top plate, a rotating column is installed on the bottom surface of the top plate, and the bottom of the rotating column traverses the interior of the rotating disk, the inner two sides of the rotating disk are provided with stepper motors, and the right side of the stepper motor is installed There is a controller, the inside of the controller is connected with a synchronous belt, and the bottom of the synchronous belt is connected with a slider, the two ends of the slider are arranged inside the slide rail, and a clamping mechanism is installed inside the slider, The upper surface of the bottom case is provided with a workbench, and a driven shaft is installed in the center of the workbench, a second driven gear is arranged above the driven shaft, and a right side of the second driven gear is installed with a driven shaft. A driven rod, two ends of the driven rod are symmetrically provided with driven helical gears, and the upper slot of the driven helical gear on the right side of the driven rod is meshed and connected with a synchronous helical gear. The tooth holes of the synchronous helical gear It is connected with the output end of the servo motor, and a fixing mechanism is arranged above the workbench. A base is installed on the surface of the bottom chassis on the left side of the workbench, and a robotic arm is connected above the base. The right side of the robotic arm is There is a laser welding head inside.

The appearance of the rotating disk is a circular structure, and the interior of the rotating disk is hollowed out. The rotating disk and the slide rail are an integrated mechanism, and the length of the slide rail is consistent with the size of the fixing mechanism, so The sliding block forms a moving structure between the synchronous belt and the controller and the stepping motor.

The clamping mechanism includes a motor, a synchronizing gear, a first driven gear, a rotating plate, a piston rod, a shunt, a guide tube, an air bag and a bearing, and a synchronizing gear is installed on the output end of the motor, and the synchronizing gear A first driven gear is meshed with the tooth slot of the first driven gear, and a rotating plate is arranged at one end of the connecting rod that traverses inside the tooth hole of the first driven gear. The bottom is connected with a shunt chamber, two ends of the shunt chamber are respectively provided with guide tubes, and an air bag is installed below the guide tubes, and a bearing is arranged between the outer side of the clamping mechanism and the inside of the slider.

The shape of the clamping mechanism is a cylindrical structure, and the upper surface of the clamping mechanism is provided with a circular ring inside the slider, and the inner ring and the outer ring of the bearing are respectively between the inner side of the slider and the upper part of the clamping mechanism In order to fix the connection by welding, the clamping mechanism constitutes a rotatable structure between the bearing and the slider.

The rotating plate and the first driven gear are connected through a connecting rod, and the size of the first driven gear is larger than that of the synchronizing gear, the air bag is tightly connected through the guide tube and the piston rod, and the air bag is An inflatable structure is formed between the telescopic operation of the piston rod driven by the rotating plate.

The table and the fixing mechanism are in active connection, the second driven gear and the driven rod and the driven helical gear are in active meshing connection, and the second driven gear and the driven shaft are fixed The top of the driven shaft and the interior of the worktable are movably connected, and the fixing mechanism constitutes a rotatable structure through the driven shaft, the driven rod and the servo motor.

The fixing mechanism includes a chute, a splint, a nut, a rotating rod, a thread, a third driven gear, a convex button and a rack, and a splint is arranged across the interior of the chute, and a nut is welded to the bottom of the splint, and A rotating rod is arranged across the inside of the nut, a thread is arranged under the nut on the right side of the rotating rod, and a third driven gear is arranged on the left side of the rotating rod. The surface centerline of the fixing mechanism is symmetrically arranged on both sides. The convex button is provided with a rack on one side of the convex button.

The upper centerline of the fixing mechanism is symmetrical and a cross mechanism is provided with a convex button and a chute, and the chute and the fixing mechanism are an integrated structure, and the shape of the fixing mechanism is a circular structure.

There is an integrated mechanism between the convex button and the rack, and an integrated structure between the right side of the rotating rod and the thread. A rotatable clamping structure is formed between the rod and the nut.

Compared with the prior art, the beneficial effects of the present invention are:

1. In the present invention, a clamping mechanism and a fixing mechanism are arranged on the upper part of the working table. Through the setting of the fixing mechanism, the position of the panel is convenient to be fixed, so as to avoid position movement during welding. The hook is clamped to avoid using external tools to clamp the hook, which is beneficial to the stability of the welding surface between the panel and the hook.

2. In the present invention, the stepper motor and the synchronous belt are arranged inside the rotating disk, and the setting of the rotating disk facilitates a fixed support for the stepping motor and the controller. The block moves in position in the slide rail, thereby facilitating adjustment of the position of the clamping mechanism above the fixing mechanism.

3. In the present invention, by setting the bottom of the clamping mechanism into a hollow state, it is convenient to extend the upper part of the hook into the interior of the clamping mechanism, and at the same time, by installing two inflatable bags on the inner wall of the clamping mechanism, and driving the piston rod to operate through the rotating plate, The interior of the inflatable bag is inflated, so that the inflatable bag can closely fit the hook while being inflated, thereby facilitating the clamping of hooks of different shapes.

4. In the present invention, the driven shaft is arranged inside the worktable, and the upper part of the driven shaft and the bottom of the fixed mechanism are welded and fixed, so that the fixed mechanism can be supported and rotated synchronously, and through the servo motor and the driven The arrangement of the rod is convenient to drive the meshing rotation between the second driven gear and the driven helical gear, thereby facilitating the rotation of the fixing mechanism.

5. In the present invention, by setting the convex button and the splint on the surface of the fixing mechanism, through the setting of the convex button, it is convenient to drive the meshing rotation of the rack and the third driven gear during the pressing process. The nut engages and rotates on the thread, so as to facilitate the clamping plate to fix and clamp the surrounding of the panel.

Description of drawings

1 is a schematic diagram of the front structure of a production equipment with a rotating function for welding of automotive plastic parts according to the present invention;

2 is a schematic diagram of the internal structure of the meshing structure between the synchronizing gear and the first driven gear of a production equipment with a rotating function for welding automotive plastic parts according to the present invention;

3 is a schematic diagram of the internal structure of a rotary disk of a production equipment with a rotating function for welding automotive plastic parts according to the present invention;

4 is a schematic structural diagram of a workbench and a fixing mechanism of a production equipment with a rotating function for welding of automotive plastic parts according to the present invention;

FIG. 5 is a schematic view of the structure of the temple of a fixing mechanism of a production equipment with a rotating function for welding of automobile plastic parts according to the present invention.

In the figure: 1. Bottom chassis; 2. Supporting frame; 3. Top plate; 4. Rotating column; 5. Rotating disc; 6. Stepper motor; 7. Controller; 8. Timing belt; 9. Slider; 10. Slide rail; 11. Clamping mechanism; 1101, Motor; 1102, Synchronous gear; 1103, First driven gear; 1104, Rotating plate; 1105, Piston rod; Airbag; 1109, Bearing; 12, Worktable; 13, Driven Shaft; 14, Second Driven Gear; 15, Driven Rod; 16, Driven Helical Gear; 17, Synchronous Helical Gear; 18, Servo Motor; 19 , fixing mechanism; 1901, chute; 1902, splint; 1903, nut; 1904, rotating rod; 1905, thread; 1906, third driven gear; 1907, knob; 1908, rack; 20, base; 21, Robotic arm; 22. Laser welding head.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, not all of the embodiments. The embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.

1-5, the present invention provides a technical solution: a production equipment with a rotating function for welding automotive plastic parts, comprising a bottom case 1, and a support frame 2 is symmetrically arranged on the upper surface of the bottom case 1, and the support frame The top of 2 is arranged in the interior of the four corners of the top plate 3, the bottom surface of the top plate 3 is provided with a rotating column 4, and the bottom of the rotating column 4 traverses the interior of the rotating disk 5, and the inner two sides of the rotating disk 5 are provided with stepping motors 6, And the controller 7 is installed on the right side of the stepping motor 6, the controller 7 is connected with a timing belt 8, and the bottom of the timing belt 8 is connected with a slider 9, and the two ends of the slider 9 are arranged inside the slide rail 10. , the appearance of the rotary disk 5 is a circular structure, and the interior of the rotary disk 5 is hollowed out, the rotary disk 5 and the slide rail 10 are an integrated mechanism, and the length of the slide rail 10 and the size of the fixing mechanism 19 are the same. Consistently, the slider 9 forms a moving structure between the synchronous belt 8 and the controller 7 and the stepper motor 6. The function of this setting is to set the stepper motor 6 and the synchronous belt 8 inside the rotating disk 5, through the rotating disk. The setting of 5 is convenient to play a fixed support role for the stepping motor 6 and the controller 7, and at the same time, the setting of the synchronous belt 8 is convenient to control the position of the slider 9 in the slide rail 10, which is beneficial to the clamping mechanism. Adjust the position of 11 above the fixing mechanism.

A clamping mechanism 11 is installed inside the slider 9, and a synchronizing gear 1102 is installed on the output end of the motor 1101. The first driven gear 1103 is meshed with the tooth slot of the synchronizing gear 1102, and the first driven gear 1103 is A rotating plate 1104 is installed at one end of the connecting rod that crosses inside the tooth hole, a piston rod 1105 is installed on the left surface of the rotating plate 1104, and the bottom of the piston rod 1105 is connected with a shunt 1106, and both ends of the shunt 1106 are respectively provided with guides. A flow tube 1107, an air bag 1108 is installed under the guide tube 1107, a bearing 1109 is arranged between the outer side of the clamping mechanism 11 and the interior of the slider 9, the clamping mechanism 11 is cylindrical in shape, and clamps The upper surface of the mechanism 11 is provided with a circular ring inside the slider 9, and the inner and outer rings of the bearing 1109 are respectively welded and fixedly connected with the inner side of the slider 9 and the upper part of the clamping mechanism 11, and the clamping mechanism 11 passes through A rotatable structure is formed between the bearing 1109 and the slider 9, the rotating plate 1104 and the first driven gear 1103 are connected by a connecting rod, and the size of the first driven gear 1103 is larger than that of the synchronizing gear 1102, and the air bag 1108 passes through the guide. The flow tube 1107 and the piston rod 1105 are tightly connected, and the air bag 1108 drives the piston rod 1105 to expand and contract through the rotating plate 1104 to form an inflatable structure. The function of this setting is to set the bottom of the clamping mechanism 11 to be hollow In this state, it is convenient to extend the top of the hook into the interior of the clamping mechanism 11, and at the same time, by installing the inflatable bags 1108 on the inner wall of the clamping mechanism 11, and driving the piston rod 1105 to operate through the rotating plate 1104, the interior of the inflatable bag 1108 is inflated. Therefore, the inflatable bag 1108 can closely fit the hooks while being inflated, thereby facilitating the clamping of hooks of different shapes.

A workbench 12 is arranged on the upper surface of the bottom case 1, and a driven shaft 13 is installed in the center of the interior of the workbench 12. A second driven gear 14 is arranged above the driven shaft 13, and the right side of the second driven gear 14 is A driven rod 15 is installed on the side, and a driven helical gear 16 is symmetrically arranged at both ends of the driven rod 15, and the upper side of the driven helical gear 16 on the right side of the driven rod 15 is meshed and connected with a synchronous helical gear 17. The tooth hole of the helical gear 17 is connected with the output end of the servo motor 18, the worktable 12 and the fixing mechanism 19 are movably connected, and the second driven gear 14 and the driven rod 15 and the driven helical gear 16 are connected with each other. Active meshing connection, the second driven gear 14 and the driven shaft 13 are fixedly connected, and the top of the driven shaft 13 and the interior of the table 12 are movably connected, and the fixing mechanism 19 is connected by the driven shaft 13 and A rotatable structure is formed between the driven rod 15 and the servo motor 18 . The function of this arrangement is to set the driven shaft 13 inside the table 12 , and to weld between the upper part of the driven shaft 13 and the bottom of the fixing mechanism 19 . Fixed, it is convenient to support the fixing mechanism 19 and can rotate synchronously, and through the setting of the servo motor 18 and the driven rod 15, it is convenient to drive the meshing rotation between the second driven gear 14 and the driven helical gear 16, which is beneficial to Fixed 19 mechanisms for rotation.

Moreover, a fixing mechanism 19 is arranged above the worktable 12 , a splint 1902 is arranged across the inside of the chute 1901 , a nut 1903 is welded to the bottom of the splint 1902 , and a rotating rod 1904 is arranged across the interior of the nut 1903 , and the rotating rod 1904 A thread 1905 is provided under the nut 1903 on the right side, and a third driven gear 1906 is provided on the left side of the rotating rod 1904. A convex button 1907 is symmetrically arranged on both sides of the surface centerline of the fixing mechanism 19, and one side of the convex button 1907 A rack 1908 is provided, and the centerline of the fixing mechanism 19 is symmetrical and cross-shaped. A knob 1907 and a chute 1901 are provided, and the chute 1901 and the fixing mechanism 19 are integrated structures, and the shape of the fixing mechanism 19 is a circle. Structure, between the convex button 1907 and the rack 1908 is an integrated mechanism, and between the right side of the rotating rod 1904 and the thread 1905 is an integrated structure, the splint 1902 is movably connected through the nut 1903 and the rotating rod 1904, and the splint 1902 A rotatable clamping structure is formed by pressing the convex button 1907, the rotating rod 1904 and the nut 1903. The effect of this setting is that by setting the convex button 1907 and the clamping plate 1902 on the surface of the fixing mechanism 19, the setting of the convex button 1907 facilitates the In the process of pressing down, the rack 1908 and the third driven gear 1906 are driven to mesh and rotate, and the setting of the rotating rod 1904 facilitates the meshing and rotating movement of the nut 1903 on the thread 1905, thereby facilitating the clamping plate 1902 to fix the surrounding of the panel Clamp.

A base 20 is mounted on the surface of the bottom chassis 1 on the left side of the worktable 12 , and a robotic arm 21 is connected above the base 20 , and a laser welding head 22 is provided inside the right side of the robotic arm 21 .

Working principle: For this type of production equipment with rotating function for welding of automotive plastic parts, first place the panel to be welded above the fixing mechanism 19 on the workbench 12, and press the panel to make the convex button 1907 start to descend, While the rack 1908 descends with the knob 1907, it drives the third driven gear 1906 to rotate synchronously through the cogging connection, so that the rotating rod 1904 installed in the tooth hole of the third driven gear 1906 starts to drive the nut on the thread 1905 1903 starts to slide, so that the clamping plate 1902 will clamp and fix the panel as the chute 1901 begins to shrink inwards.

After the panel is fixed, the clamping mechanism 11 is moved on the slide rail 10 with the slider 9 through the stepper motor 6 and the controller 7 provided inside the rotary disk 5, and the clamping mechanism 11 is moved to the panel as required. At the welding position, then place the hook in an upside-down structure so that the welding surface is aligned with the surface of the panel and put it into the clamping mechanism 11, and then control the internal motor 1101 of the clamping mechanism 11 to start to operate to drive the first meshing connection with the output synchronous gear 1102. The driven gear 1103 starts to rotate, so that the rotating plate 1104 drives the piston rod 1105 to start the piston movement, so that the gas enters the guide tubes 1107 provided at both ends through the shunt chamber 1106, so that the air bag 1108 starts to inflate and bulge. The hook is clamped and fixed, the laser welding head 22 welds the panel and the hook through the mechanical arm 21, and the servo motor 18 on the bottom chassis 1 starts to drive the synchronous helical gear 17 to rotate, so that the driven rod 15 then starts to rotate synchronously through the power transmission of the driven helical gears 16 provided at both ends, so that the driven shaft 13 starts to rotate through the second driven gear 14, so that the fixing mechanism 19 starts to rotate, so that the laser welding head 22 is connected to the panel and the panel. The hooks are welded and fixed. When the welding is completed, only the splint 1902 needs to be moved outward, and the panel can be taken out from the fixing mechanism 19. In this way, the whole process of using the production equipment with rotating function for welding of automobile plastic parts is completed. .

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, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (9)

1. A production equipment with a rotating function for welding of automotive plastic parts, comprising a bottom case (1), characterized in that: the upper surface of the bottom case (1) is symmetrically provided with a support frame (2), and the support frame ( The top of 2) is arranged inside the four corners of the top plate (3), the bottom surface of the top plate (3) is provided with a rotating column (4), and the bottom of the rotating column (4) traverses the interior of the rotating disk (5), so A stepper motor (6) is provided on both sides of the inner side of the rotary disk (5), and a controller (7) is installed on the right side of the stepper motor (6), and a timing belt is connected inside the controller (7). (8), and a sliding block (9) is connected below the timing belt (8), the two ends of the sliding block (9) are arranged inside the sliding rail (10), and the sliding block (9) is installed inside the sliding block (9). A clamping mechanism (11), a worktable (12) is provided on the upper surface of the bottom case (1), and a driven shaft (13) is installed in the center of the worktable (12), and the driven shaft (13) A second driven gear (14) is arranged above the ), and a driven rod (15) is installed on the right side of the second driven gear (14), and two ends of the driven rod (15) are symmetrically provided with a driven rod (15). The driven helical gear (16), and the upper slot of the driven helical gear (16) on the right side of the driven rod (15) is meshed with a synchronous helical gear (17), and the tooth hole of the synchronous helical gear (17) is connected to the The output ends of the servo motors (18) are connected, and a fixing mechanism (19) is arranged above the workbench (12), and a base (20) is mounted on the surface of the left bottom chassis (1) of the workbench (12). , and a robotic arm (21) is connected above the base (20), and a laser welding head (22) is provided inside the right side of the robotic arm (21). 2 . The production equipment with a rotating function for welding automotive plastic parts according to claim 1 , wherein the appearance of the rotating disk ( 5 ) is a circular structure, and the interior of the rotating disk ( 5 ) has a circular structure. 3 . It is a hollow installation, an integrated mechanism is formed between the rotating disk (5) and the sliding rail (10), and the length dimension of the sliding rail (10) is consistent with the dimension of the fixing mechanism (19), and the sliding block (9) ) through the synchronous belt (8) and between the controller (7) and the stepping motor (6) to form a moving structure. 3 . The production equipment with a rotating function for welding automotive plastic parts according to claim 1 , wherein the clamping mechanism ( 11 ) comprises a motor ( 1101 ), a synchronizing gear ( 1102 ), a first slave The moving gear (1103), the rotating plate (1104), the piston rod (1105), the shunt chamber (1106), the guide tube (1107), the air bag (1108) and the bearing (1109), and the output end of the motor (1101) A synchronizing gear (1102) is installed on the synchronizing gear (1102), a first driven gear (1103) is engaged with the cogging of the synchronizing gear (1102), and one end of the connecting rod traversing inside the tooth hole of the first driven gear (1103) A rotating plate (1104) is provided, a piston rod (1105) is installed on the left side surface of the rotating plate (1104), and a diverter chamber (1106) is connected to the bottom of the piston rod (1105), and the diverter chamber (1106) A guide tube (1107) is respectively provided at both ends of the guide tube (1107), and an inflatable bag (1108) is installed under the guide tube (1107), between the outside of the clamping mechanism (11) and the inside of the slider (9) Bearings (1109) are provided. 4 . The production equipment with a rotating function for welding automotive plastic parts according to claim 3 , wherein the clamping mechanism ( 11 ) has a cylindrical structure, and the clamping mechanism ( 11 ) has a cylindrical shape. 5 . A circular ring is arranged inside the slider (9) on the upper surface, and the inner and outer rings of the bearing (1109) are respectively welded and fixedly connected with the inner side of the slider (9) and the upper part of the clamping mechanism (11). The clamping mechanism (11) forms a rotatable structure between the bearing (1109) and the slider (9). 5. A production equipment with a rotating function for welding automotive plastic parts according to claim 3, wherein the rotating plate (1104) is connected with the first driven gear (1103) through a connecting rod , and the size of the first driven gear (1103) is larger than that of the synchronizing gear (1102). ) through the rotating plate (1104) to drive the piston rod (1105) to expand and contract to form an inflatable structure. 6. A production equipment with a rotating function for welding of automotive plastic parts according to claim 1, characterized in that: the worktable (12) and the fixing mechanism (19) are movably connected, and the second slave There is a movable meshing connection between the driven gear (14) and the driven rod (15) and the driven helical gear (16), and the second driven gear (14) and the driven shaft (13) are fixedly connected, And the top of the driven shaft (13) and the inside of the workbench (12) are connected movably, and the fixing mechanism (19) is connected by the driven shaft (13), the driven rod (15) and the servo motor (18). ) to form a rotatable structure. 7. A production equipment with a rotating function for welding of automotive plastic parts according to claim 1, wherein the fixing mechanism (19) comprises a chute (1901), a splint (1902), and a nut (1903) , rotating rod (1904), thread (1905), third driven gear (1906), convex button (1907) and rack (1908), and the inside of the chute (1901) is provided with a splint (1902), A nut (1903) is welded to the bottom of the splint (1902), and a rotating rod (1904) is arranged across the inside of the nut (1903), and a thread is provided below the nut (1903) on the right side of the rotating rod (1904). (1905), and a third driven gear (1906) is provided on the left side of the rotating rod (1904), and convex buttons (1907) are symmetrically arranged on both sides of the surface centerline of the fixing mechanism (19), and the convex buttons ( 1907) is provided with a rack (1908) on one side. 8. A production equipment with a rotating function for welding of automotive plastic parts according to claim 7, wherein the fixing mechanism (19) is provided with convex buttons (1907) and A chute (1901), and an integrated structure is formed between the chute (1901) and the fixing mechanism (19), and the shape of the fixing mechanism (19) is a circular structure. 9. A production equipment with a rotating function for welding of automotive plastic parts according to claim 7, characterized in that: an integrated mechanism is formed between the convex button (1907) and the rack (1908), and the rotating rod There is an integrated structure between the right side of (1904) and the thread (1905). 1907) and the rotating rod (1904) and the nut (1903) form a rotatable clamping structure.

Images