New energy automobile side wall

Abstract

This invention relates to the field of automotive side panel technology and discloses a side panel for a new energy vehicle, comprising a rear side panel outer plate, a rear side panel inner plate, and a fixed beam. The fixed beam is fixedly connected to the vehicle body of the new energy vehicle. Two first limiting holes are provided at the upper and lower parts of the fixed beam, and a second limiting hole is provided in the middle of the fixed beam. Four first T-shaped pins are fixedly connected to the inner side of the rear side panel outer plate, and the four first T-shaped pins are movably inserted into the four first limiting holes. A second T-shaped pin is fixedly connected to the middle of the inner side of the rear side panel outer plate, and the second T-shaped pin is movably inserted into the second limiting hole. This new energy vehicle side panel has a connecting and fixing structure that can conveniently connect and fix the rear side panel outer plate and the rear side panel inner plate to the fixed beam. This connecting and fixing structure is simple in design, convenient to use and operate, and provides stable and reliable connection and fixing.

Description

Technical Field

[0001] This invention belongs to the field of automotive side panel technology, specifically a side panel for a new energy vehicle. Background Technology

[0002] Automobiles are an essential means of transportation. With the continuous development of technology, people have higher and higher requirements for automobile performance. The production and manufacturing of automobiles requires a variety of parts. The rear side structure of automobiles has an important impact on the torsional stiffness, strength and overall performance of automobiles. Reasonable design of the rear side structure of automobiles can improve automobile performance and stiffness and achieve lightweighting.

[0003] The rear side panel structure of a car consists of an outer rear side panel, an inner rear side panel, and a fixed beam. The outer and inner rear side panels are welded onto the fixed beam. Firstly, the welding operation of the outer and inner rear side panels is relatively complex, and the outer and inner rear side panels are quite heavy, requiring support and fixing structures for assistance during the welding operation. Secondly, the rear side panel bears a large force, which can easily lead to cracking of the weld points after prolonged use. Therefore, improvements are needed to address these issues. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a side panel for a new energy vehicle, comprising a rear side panel outer plate, a rear side panel inner plate, and a fixed beam. The fixed beam is fixedly connected to the vehicle body of the new energy vehicle. Two first limiting holes are provided at the upper and lower parts of the fixed beam, and a second limiting hole is provided in the middle of the fixed beam. Four first T-shaped pins are fixedly connected to the inner side of the rear side panel outer plate, and the four first T-shaped pins are movably inserted into the four first limiting holes. A second T-shaped pin is fixedly connected to the middle of the inner side of the rear side panel outer plate, and the second T-shaped pin is movably inserted into the second limiting hole. Inside the limiting insertion hole, four insertion rods are fixedly connected to the side of the rear inner panel near the fixed beam. The four insertion rods are respectively connected to four first T-shaped pins. A rotating shaft is rotatably connected to the middle of the rear inner panel, and the rotating shaft is connected to a second T-shaped pin. A main adjustment component connected to the rotating shaft is installed in the middle of the side of the rear inner panel away from the fixed beam. A rotating component connected to the main adjustment component is connected to the side of the rear inner panel away from the fixed beam. Four transmission components connected to the main adjustment component are also connected to the side of the rear inner panel away from the fixed beam. The four transmission components are respectively connected to the four insertion rods.

[0005] Preferably, the rear inner panel has a mounting groove on the side away from the fixed beam. The main adjustment component, rotating component, and transmission component are all located inside the mounting groove. A sealing cover is provided inside the mounting groove. A locking sealing ring is fixedly connected to one edge of the sealing cover. The sealing cover is movably locked inside the mounting groove by the locking sealing ring, thereby effectively shielding and protecting the adjustment component, rotating component, and transmission component.

[0006] Preferably, one end of the second T-shaped pin has an inverted convex inner groove, and a limiting slider is installed inside the inverted convex inner groove. One end of the limiting slider is fixedly connected to an internal threaded tube. A stop block that contacts the end of the second T-shaped pin is fixedly installed in the middle of the rear inner plate near the fixed beam. The stop block is located above the second T-shaped pin to prevent the second T-shaped pin from sliding upward inside the second limiting hole.

[0007] Preferably, a connecting threaded pin is fixedly connected to one end of the rotating shaft near the second T-shaped pin, and a large gear is fixedly connected to the end of the rotating shaft and the connecting threaded pin that is inserted into the inverted convex inner groove away from the end near the second T-shaped pin. A worm gear is fixedly connected to one side of the large gear, so that the rear outer panel and the rear inner panel can be effectively installed on the fixed beam through the second T-shaped pin, the rotating shaft, and the second limiting insertion hole.

[0008] Preferably, the rotating component includes a worm and two rotating nuts. The worm is rotatably connected inside the mounting groove and meshes with a worm wheel. The two rotating nuts are fixedly connected to both ends of the worm, thereby enabling effective adjustment and maintaining the stability of the adjustment.

[0009] Preferably, both rotating nuts are hexagonal in shape, and each of the two rotating nuts has three threaded holes and three through holes at equal intervals on its surface. The threaded holes and through holes are arranged alternately, and the threaded holes are aligned with the through holes. Bolts are threaded into the internal threads of the threaded holes, and rotating nuts and abutment rods are fixedly connected to the two ends of the bolts, respectively. The abutment rods pass through the through holes and contact the mounting groove, thereby effectively fixing the adjusted worm gear and maintaining the stability of the adjustment.

[0010] Preferably, each of the four transmission components includes a pinion, which is rotatably connected inside the mounting groove and meshes with a large gear. A winding wheel is fixedly connected to one side of each of the four pinions. Pulleys are rotatably installed at the four corners of the mounting groove near the insertion rod. Metal cables are fixedly connected to the surfaces of the four winding wheels, and the four metal cables are in contact with the surfaces of the four pulleys respectively.

[0011] Preferably, each of the four insertion rods has a square through groove in the middle, and a square pin is movably inserted into the inside of the square through groove. One end of each of the four metal cables extends into the inside of the four square through grooves and is fixedly connected to one end of the square pin. The other end of the square pin is fixedly connected to a conical extrusion truncated cone. Four elastic metal strips are fixedly connected at equal intervals in a ring to the end of each of the four insertion rods near the first T-shaped pin. One end of each of the four elastic metal strips is fixedly connected to a locking block.

[0012] Preferably, the inner side of each card block is provided with an extrusion slope that matches the conical extrusion frustum, and the outer side of each card block is provided with a clamping slope. One end of each of the four first T-shaped pins is provided with a slot, and the middle of each slot is provided with a fixing limiting slope that matches the clamping slope. This effectively reinforces the four corners of the rear outer panel and the rear inner panel that are installed and connected, and maintains the firmness of the installation connection.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] In operation, the rear side panel of this new energy vehicle is equipped with a connecting and fixing structure consisting of an outer rear side panel, an inner rear side panel, a fixing beam, a first limiting hole, a second limiting hole, a first T-shaped pin, a second T-shaped pin, a rod, a rotating shaft, a main adjusting component, a rotating component, and a transmission component. This connecting and fixing structure allows for easy connection and fixing of the outer and inner rear side panels to the fixing beam. Furthermore, this connecting and fixing structure can install the rear side panel of the vehicle without the need for support or fixing devices, thus effectively improving the convenience of installing the rear side panel. At the same time, the connecting and fixing structure is simple in design, convenient to use and operate, and provides stable and reliable connection and fixing. Its performance meets the usage requirements for the installation of the side panel of new energy vehicles.

[0015] When installing the rear side panel outer and inner panels, first install the rear side panel onto the fixed beam, inserting the four first T-shaped pins and the second T-shaped pins on the rear side panel into the four first limiting holes and the second limiting holes respectively. Then, lower the rear side panel so that the four first T-shaped pins and the second T-shaped pins are respectively engaged in the lower part of the first limiting holes and the second limiting holes. Next, install the rear side panel, inserting the four rods and the rotating shaft on the rear side panel into the four first T-shaped pins and the second T-shaped pins respectively. This allows the rotating shaft to be inserted into the inverted convex inner groove and to contact the internal threaded tube. Then, the rotating shaft and the connecting threaded pin are driven to rotate through the worm gear and the large gear. The rotation of the rotating shaft will screw into the internal threaded tube and pull the internal threaded tube to move. The movement of the internal threaded tube will drive the limiting slider to move, and finally the limiting slider will be stuck in the middle of the inverted convex inner groove. This ensures that the rotating shaft, the connecting threaded pin and the limiting slider are firmly connected, so that the rear side outer panel and the rear side inner panel can be stably installed on the fixed beam.

[0016] By using a tool to rotate the rotating nut, the worm gear is driven to rotate. The rotation of the worm gear will drive the worm wheel, which in turn drives the large gear and the rotating shaft to rotate. After the worm gear is adjusted, the rotating nut is rotated using a tool. The rotation of the rotating nut will drive the bolt to rotate. The rotation of the bolt will drive the abutment rod to pass through the through hole and make contact with the mounting slot, so that the worm gear and the two rotating nuts will not rotate arbitrarily.

[0017] When installing the rear inner panel, the four inserts drive the square pin, conical extrusion frustum, elastic metal strip, and locking block into the slot. As the large gear rotates, it drives the four small gears, which in turn rotate the winding wheel, winding up the metal cable. The cable, wound by the winding wheel, moves through the pulley, pulling the square pin into the square through slot. The movement of the square pin moves the conical extrusion frustum, which then presses against the locking block, deforming the elastic metal strip. This causes the locking block to move, bringing the locking bevel into contact with the fixed limiting bevel, securing the inserts firmly into the slot. This reinforces the four corners of the installed rear outer and inner panels, ensuring a secure connection. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1 This is a schematic diagram of the front view of the side panel structure of the new energy vehicle according to the present invention;

[0021] Figure 2 This is a schematic diagram of the rear-view side structure of the new energy vehicle according to the present invention;

[0022] Figure 3 For the present invention Figure 2 A partial structural diagram of the inner panel of the middle and rear side walls;

[0023] Figure 4 This is a front view of the sealing cap of the present invention.

[0024] Figure 5 For the present invention Figure 1 A partial structural diagram;

[0025] Figure 6 This is a schematic diagram of the structure of the fixed beam of the present invention;

[0026] Figure 7 This is a front view structural diagram of the present invention 2;

[0027] Figure 8 This is a top-section schematic diagram of the first T-shaped pin and the insertion rod of the present invention;

[0028] Figure 9 This is a top-section schematic diagram of the second T-shaped pin and the rotating shaft of the present invention;

[0029] Figure 10 This is a side sectional view of the rotating nut of the present invention;

[0030] In the diagram: 1. Rear side outer panel; 2. Rear side inner panel; 201. Mounting groove; 202. Sealing cap; 203. Clamping sealing ring; 3. Fixing beam; 4. First limiting insertion hole; 5. Second limiting insertion hole; 6. First T-shaped pin; 7. Second T-shaped pin; 8. Insert rod; 9. Rotating shaft; 11. Inverted convex inner groove; 12. Limiting slider; 13. Internally threaded tube; 14. Stop block; 15. Connecting threaded pin; 16. Large gear; 17. Worm gear 18. Wheel; 19. Worm; 20. Rotating nut; 21. Threaded hole; 22. Through hole; 23. Bolt; 24. Rotating cap; 25. Abutting rod; 26. Pinion; 27. Winding wheel; 28. Pulley; 29. ​​Metal cable; 30. Square through slot; 31. Square pin; 32. Conical extrusion frustum; 33. Elastic metal strip; 34. Clamping block; 35. Extrusion bevel; 36. Clamping bevel; 37. Slot; 38. Fixed limiting bevel. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] Example 1, by Figures 1 to 10The present invention includes a rear side outer panel 1, a rear side inner panel 2, and a fixing beam 3. The fixing beam 3 is fixedly connected to the vehicle body of the new energy vehicle. Two first limiting holes 4 are provided at the upper and lower parts of the fixing beam 3, and a second limiting hole 5 is provided in the middle of the fixing beam 3. Four first T-shaped pins 6 are fixedly connected to the inner side of the rear side outer panel 1, and the four first T-shaped pins 6 are movably inserted into the four first limiting holes 4. A second T-shaped pin 7 is fixedly connected to the middle of the inner side of the rear side outer panel 1, and the second T-shaped pin 7 is movably inserted into the second limiting hole 5. Four insert rods 8 are fixedly connected to the side of the rear side inner panel 2 near the fixing beam 3, and the four insert rods 8 are respectively connected to the four first T-shaped pins 6. A rotating shaft 9 is rotatably connected to the middle of the rear side inner panel 2, and the rotating shaft 9 is connected to the second T-shaped pins 7. A main adjustment component connected to a rotating shaft 9 is installed in the middle of the side of the plate 2 away from the fixed beam 3. A rotating component connected to the main adjustment component is connected to the side of the rear inner plate 2 away from the fixed beam 3. Four transmission components connected to the main adjustment component are also connected to the side of the rear inner plate 2 away from the fixed beam 3. The four transmission components are connected to four insert rods 8 respectively. An installation groove 201 is provided on the side of the rear inner plate 2 away from the fixed beam 3. The main adjustment component, rotating component, and transmission component are all located inside the installation groove 201. A sealing cover 202 is provided inside the installation groove 201. A clamping sealing ring 203 is fixedly connected to one edge of the sealing cover 202. The sealing cover 202 is movably clamped inside the installation groove 201 by the clamping sealing ring 203, thereby effectively shielding and protecting the adjustment component, rotating component, and transmission component.

[0033] This new energy vehicle side panel has a connecting and fixing structure that can easily connect and fix the rear side panel outer panel and the rear side panel inner panel to the fixing beam. Moreover, this connecting and fixing structure can install the rear side panel of the vehicle without the need for support and fixing devices, thereby effectively improving the convenience of the rear side panel installation. At the same time, the connecting and fixing structure is simple in design, convenient to use and operate, and the connection and fixing are stable and reliable. Its performance can meet the usage requirements of new energy vehicle side panel installation.

[0034] In Embodiment 2, based on Embodiment 1, one end of the second T-shaped pin 7 is provided with an inverted convex inner groove 11. A limiting slider 12 is installed inside the inverted convex inner groove 11. One end of the limiting slider 12 is fixedly connected to an internal threaded tube 13. A stop block 14 is fixedly installed in the middle of the rear side inner plate 2 near the fixed beam 3, which contacts the end of the second T-shaped pin 7. The stop block 14 is located above the second T-shaped pin 7 to prevent the second T-shaped pin 7 from sliding upward inside the second limiting hole 5. A connecting threaded pin 15 is fixedly connected to one end of the rotating shaft 9 near the second T-shaped pin 7. The rotating shaft 9 and the connecting threaded pin 15 are inserted into the inverted convex inner groove 11. A large gear 16 is fixedly connected to the end away from the second T-shaped pin 7. A worm gear 17 is fixedly connected to one side of the large gear 16, so that the rear side outer plate 1 and the rear side inner plate 2 can be effectively installed on the fixed beam 3 through the second T-shaped pin 7, the rotating shaft 9, and the second limiting hole 5.

[0035] When installing the rear side outer panel 1 and the rear side inner panel 2, first install the rear side outer panel 1 on the fixed beam 3, so that the four first T-shaped pins 6 and the second T-shaped pins 7 on the rear side outer panel 1 are inserted into the four first limiting holes 4 and the second limiting holes 5 respectively. Then move the rear side outer panel 1 down so that the four first T-shaped pins 6 and the second T-shaped pins 7 are respectively locked in the lower part of the first limiting holes 4 and the second limiting holes 5.

[0036] Next, the rear inner panel 2 is installed, so that the four inserts 8 and the rotating shaft 9 on the rear inner panel 2 are inserted into the four first T-shaped pins 6 and the second T-shaped pins 7 respectively, thereby inserting the rotating shaft 9 into the inverted convex inner groove 11 and making the rotating shaft 9 contact the internal threaded tube 13. Then, the rotating shaft 9 and the connecting threaded pin 15 are driven to rotate through the worm gear 17 and the large gear 16. The rotation of the rotating shaft 9 will screw into the internal threaded tube 13 and pull the internal threaded tube 13 to move. The movement of the internal threaded tube 13 will drive the limiting slider 12 to move, and finally make the limiting slider 12 stuck in the middle of the inverted convex inner groove 11, thereby keeping the rotating shaft 9, the connecting threaded pin 15 and the limiting slider 12 firmly connected, so that the rear outer panel 1 and the rear inner panel 2 can be stably installed on the fixed beam 3.

[0037] In Example 3, based on Example 2, the rotating component includes a worm gear 18 and two rotating nuts 19. The worm gear 18 is rotatably connected inside the mounting groove 201 and meshes with the worm wheel 17. The two rotating nuts 19 are fixedly connected to both ends of the worm gear 18, thereby enabling effective adjustment and maintaining adjustment stability. By using a tool to rotate the rotating nuts 19, the worm gear 18 is driven to rotate. The rotation of the worm gear 18 transmits power to the worm wheel 17, thereby causing the worm wheel 17 to drive the large gear 16 and the rotating shaft 9 to rotate.

[0038] Both rotating nuts 19 are hexagonal in shape, and each of the two rotating nuts 19 has three threaded holes 20 and three through holes 21 evenly spaced on its surface. The threaded holes 20 and through holes 21 are staggered and aligned with each other. Bolts 22 are threaded into the internal threads of the threaded holes 20. Rotating caps 23 and contact rods 24 are fixedly connected to both ends of the bolts 22, respectively. The contact rods 24 penetrate through the through holes 21 and contact the mounting grooves 201, thereby effectively fixing the adjusted worm gear 18 and maintaining the stability of the adjustment. After the worm gear 18 is adjusted, the rotating caps 23 are rotated using a tool. The rotation of the rotating caps 23 will cause the bolts 22 to rotate, and the rotation of the bolts 22 will cause the contact rods 24 to penetrate through the through holes 21 and contact the mounting grooves 201, preventing the worm gear 18 and the two rotating nuts 19 from rotating arbitrarily.

[0039] In Example 4, based on Example 1, each of the four transmission components includes a pinion 25. All four pinions 25 are rotatably connected inside the mounting groove 201 and mesh with the large gear 16. A winding wheel 26 is fixedly connected to one side of each of the four pinions 25. Pulleys 27 are rotatably mounted at the four corners of the mounting groove 201 near the insertion rod 8. Metal cables 28 are fixedly connected to the surfaces of the four winding wheels 26, and each of the four metal cables 28 contacts the surface of one of the four pulleys 27. A square through-slot 29 is opened in the middle of each of the four insertion rods 8. A square pin 30 is movably inserted into the interior of the square through-slot 29. One end of each of the four metal cables 28 extends into the interior of the four square through-slots 29 and connects with the square pin 30. One end is fixedly connected to a square pin 30, and the other end is fixedly connected to a conical extrusion frustum 31. Four elastic metal strips 32 are fixedly connected at equal intervals in a ring near the ends of the four insert rods 8 close to the first T-shaped pin 6. Each of the four elastic metal strips 32 is fixedly connected to a locking block 33. The inner side of the locking block 33 is provided with an extrusion slope 34 that matches the conical extrusion frustum 31, and the outer side of the locking block 33 is provided with a locking slope 35. Each of the four first T-shaped pins 6 is provided with a slot 36, and the middle of the slot 36 is provided with a fixing limiting slope 37 that matches the locking slope 35. This effectively reinforces the four corners of the installed and connected rear side outer panel 1 and rear side inner panel 2, maintaining the firmness of the installation connection.

[0040] When the rear side inner panel 2 is installed, the four insert rods 8 on it drive the square pin 30, the conical extrusion frustum 31, the elastic metal strip 32 and the locking block 33 to be inserted into the slot 36.

[0041] When the large gear 16 rotates, it drives the four small gears 25 to rotate. The rotation of the small gears 25 drives the winding wheel 26 to rotate, which in turn winds up the metal cable 28. The metal cable 28, wound up by the winding wheel 26, moves through the pulley 27, causing the metal cable 28 to pull the square pin 30 into the square through slot 29. The movement of the square pin 30 causes the conical extrusion platform 31 to move, ultimately causing the conical extrusion platform 31 to press the locking block 33 through the extrusion ramp 34, deforming the elastic metal strip 32. This causes the elastic metal strip 32 to move the locking block 33, making the locking ramp 35 contact and lock with the fixed limiting ramp 37, so that the insertion rod 8 can be firmly inserted into the slot 36. This reinforces the four corners of the rear side outer panel 1 and the rear side inner panel 2, maintaining the firmness of the installation connection.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A side panel for a new energy vehicle, comprising a rear side panel outer panel (1), a rear side panel inner panel (2), and a fixed beam (3), characterized in that: The fixed beam (3) is fixedly connected to the new energy vehicle body. Two first limiting holes (4) are provided at the upper and lower parts of the fixed beam (3), and a second limiting hole (5) is provided in the middle of the fixed beam (3). Four first T-shaped pins (6) are fixedly connected to the inner side of the rear side panel (1). The four first T-shaped pins (6) are movably inserted into the four first limiting holes (4). A second T-shaped pin (7) is fixedly connected to the middle of the inner side of the rear side panel (1). The second T-shaped pin (7) is movably inserted into the second limiting hole (5). The side of the rear side panel (2) closest to the fixed beam (3) is fixedly connected to... There are four insert rods (8), which are connected to four first T-shaped pins (6) respectively. A rotating shaft (9) is rotatably connected to the middle of the rear inner panel (2), and the rotating shaft (9) is connected to the second T-shaped pin (7). A main adjustment component connected to the rotating shaft (9) is installed in the middle of the side of the rear inner panel (2) away from the fixed beam (3). A rotating component connected to the main adjustment component is connected to the side of the rear inner panel (2) away from the fixed beam (3). Four transmission components connected to the main adjustment component are connected to the side of the rear inner panel (2) away from the fixed beam (3). The four transmission components are connected to the four insert rods (8) respectively. The rear inner panel (2) has an installation groove (201) on the side away from the fixed beam (3). The main adjustment component, rotating component and transmission component are all located inside the installation groove (201). The installation groove (201) has a sealing cover (202) inside. A clamping sealing ring (203) is fixedly connected to one edge of the sealing cover (202). The sealing cover (202) is movably clamped inside the installation groove (201) by the clamping sealing ring (203). One end of the second T-shaped pin (7) is provided with an inverted convex inner groove (11), and a limit slider (12) is installed inside the inverted convex inner groove (11). One end of the limit slider (12) is fixedly connected to an internal threaded tube (13). A stop block (14) that contacts the end of the second T-shaped pin (7) is fixedly installed in the middle of the rear side inner plate (2) near the fixed beam (3). The stop block (14) is located above the second T-shaped pin (7) to prevent the second T-shaped pin (7) from sliding upward inside the second limit hole (5). The rotating shaft (9) is fixedly connected to a connecting threaded pin (15) at one end near the second T-shaped pin (7). The rotating shaft (9) and the connecting threaded pin (15) are inserted into the inverted convex inner groove (11). A large gear (16) is fixedly connected to the end away from the second T-shaped pin (7). A worm gear (17) is fixedly connected to one side of the large gear (16). The rotating component includes a worm (18) and two rotating nuts (19). The worm (18) is rotatably connected inside the mounting groove (201) and meshes with the worm wheel (17). The two rotating nuts (19) are fixedly connected to both ends of the worm (18). Both rotating nuts (19) are hexagonal in structure, and three threaded holes (20) and three through holes (21) are equally spaced on the surface of each rotating nut (19). The threaded holes (20) and through holes (21) are arranged alternately, and the threaded holes (20) are aligned with the through holes (21). The threaded holes (20) are connected to bolts (22) by internal threads. The two ends of the bolts (22) are respectively fixedly connected to rotating caps (23) and abutting rods (24). The abutting rods (24) penetrate through the through holes (21) and contact the mounting groove (201). All four transmission components include a pinion (25), which is rotatably connected inside the mounting groove (201) and meshes with the large gear (16). A winding wheel (26) is fixedly connected to one side of each of the four pinions (25). Pulleys (27) are rotatably installed at the four corners of the mounting groove (201) near the insertion rod (8). Metal cables (28) are fixedly connected to the surfaces of the four winding wheels (26), and the four metal cables (28) are in contact with the surfaces of the four pulleys (27). The four insertion rods (8) are provided with square through slots (29) in the middle. Square pins (30) are movably inserted into the square through slots (29). One end of the four metal cables (28) extends into the four square through slots (29) and is fixedly connected to one end of the square pins (30). The other end of the square pins (30) is fixedly connected to a conical extrusion frustum (31). Four elastic metal strips (32) are fixedly connected at equal intervals in a ring at the end of the four insertion rods (8) near the first T-shaped pin (6). One end of each of the four elastic metal strips (32) is fixedly connected to a locking block (33). The inner side of each of the card blocks (33) is provided with an extrusion slope (34) that matches the conical extrusion frustum (31), and the outer side of each of the card blocks (33) is provided with a clamping slope (35). One end of each of the four first T-shaped pins (6) is provided with a slot (36), and the middle of each slot (36) is provided with a fixing limiting slope (37) that matches the clamping slope (35).

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