High-strength wide-temperature-range nickel alloy fastener machining cooling device

Abstract

The invention relates to the technical field of machining and cooling, and discloses a high-strength wide-temperature-range nickel alloy fastener machining and cooling device which comprises four sets of supporting legs, fixing blocks are fixedly connected to the tops of the four sets of supporting legs, water storage grooves are formed in the inner walls of the fixing blocks, the high-strength wide-temperature-range nickel alloy fastener machining and cooling device further comprises a pulling mechanism, and the pulling mechanism comprises an attaching plate; the attaching plate is installed at the top of the fixing block, and the left side and the right side of the attaching plate are fixedly connected with contact blocks. By arranging the clamping mechanism, when a fastener needs to be wiped, collective wiping operation can be completed at a time, after the clamped fastener makes contact with a sponge plate, a vibration phenomenon can be caused by resilience force generated by a pulling mechanism, the vibration can drive the fastener to shake, and therefore the fastener can be wiped conveniently. And the sponge plate can wipe the periphery of the fastener in all directions, and the wiping effect and wiping efficiency of the fastener are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of processing cooling, and particularly to a processing cooling device for high-strength wide-temperature-range nickel alloy fasteners. Background Art

[0002] Fasteners are basic components used to connect, fix or seal mechanical parts, and are widely used in fields such as industrial manufacturing, construction, automobiles, aerospace, etc. Common fasteners include bolts, nuts, screws, washers, rivets, pins, etc. Their materials are mostly carbon steel, stainless steel or alloy steel, and titanium alloy or plastic are used in some special environments. Fasteners achieve stable connection through methods such as threading, interference fit or mechanical locking, and need to meet the requirements of strength, corrosion resistance and seismic resistance. International standards (such as ISO, DIN) and industry specifications (such as GB, ANSI) have strict regulations on dimensions, tolerances and performance. With the progress of technology, high-strength, anti-loosening and lightweight fasteners have become the development trend, which is crucial for the safety and reliability of equipment.

[0003] The patent application with the application number CN202211138191.9 discloses a fastener processing cooling device, including a liquid cooling device, and a heat dissipation device is arranged at the bottom of the liquid cooling device. The present invention relates to the technical field of cooling. For this fastener processing cooling device, by setting the liquid cooling device and the heat dissipation device, when the equipment is in use, the workpiece enters the inside of the liquid cooling device, and under the immersion cooling effect of the cooling water, the workpiece completes quenching and cooling, and the temperature of the cooling water inside the liquid cooling device decreases.

[0004] Currently, after the water cooling operation of the fastener is completed, it is necessary to manually wipe the excess water stains on its outer surface, and then let it dry naturally. This operation process is not only inefficient but also consumes a lot of manpower. Therefore, this process needs to be improved. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a processing cooling device for high-strength wide-temperature-range nickel alloy fasteners to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A processing cooling device for high-strength wide-temperature-range nickel alloy fasteners, including four sets of support legs, and fixing blocks are fixedly connected to the tops of the four sets of support legs. A water storage tank is provided inside the inner wall of the fixing block. The device further includes: A pulling mechanism, the pulling mechanism includes a fitting plate, the fitting plate is installed on the top of the fixing block, contact blocks are fixedly connected to both the left and right sides of the fitting plate, first rotating plates are fixedly connected to the sides of the two contact blocks away from the fitting plate, and second rotating plates are rotatably connected to the sides of the two first rotating plates away from the contact blocks through first rotating shafts. The second rotating plate is used to limit the excessive rotation of the first rotating plate.

[0007] According to the above technical solution, arc grooves are formed in the outer walls of the two groups of the first rotating plates, sliding blocks are arranged on the inner walls of the two groups of arc grooves, one sides of the two groups of sliding blocks close to the inner walls of the arc grooves are slidably connected to the peripheries of the inner walls of the arc grooves, rectangular blocks are arranged on one sides of the outer walls of the two groups of the second rotating plates close to the first rotating plates, one sides of the two groups of rectangular blocks close to the second rotating plates are fixedly connected to the outer walls of the second rotating plates, elastic ropes are arranged on one sides of the two groups of rectangular blocks away from the second rotating plates, one sides of the two groups of elastic ropes close to the sliding blocks are fixedly connected to the tops of the sliding blocks, and one sides of the two groups of elastic ropes close to the rectangular blocks are fixedly connected to the outer walls of the rectangular blocks. The elastic ropes are used to pull the sliding blocks to move.

[0008] According to the above technical solution, a clamping mechanism is further included. The clamping mechanism includes a top plate. One side of the top plate close to the fixed block is fixedly connected to the outer wall of the fixed block. Both the left and right sides of the top plate are rotatably connected to the second rotating plate through a second rotating shaft. The top plate is used to limit the second rotating plate.

[0009] According to the above technical solution, two groups of first elastic rods are arranged on the inner wall of the top plate. One sides of the two groups of first elastic rods close to the top plate are fixedly connected to the inner wall of the top plate. Protective shells are fixedly connected to one sides of the two groups of first elastic rods close to each other. The first elastic rods are used to fix the positions of the protective shells.

[0010] According to the above technical solution, two groups of springs are arranged on the inner walls of the two groups of protective shells. One sides of the four groups of springs close to the inner walls of the protective shells are fixedly connected to the inner walls of the protective shells. Push plates are fixedly connected to one sides of the four groups of springs away from the inner walls of the protective shells. Limiting plates are fixedly connected to one sides of the four groups of push plates close to each other. One sides of the two groups of limiting plates close to each other are in contact with the sponge plate. The springs are used to push the push plates to move.

[0011] According to the above technical solution, a fixing mechanism is further included. The fixing mechanism includes two groups of bent plates. One sides of the two groups of bent plates close to the top plate are fixedly connected to the top of the top plate. A positioning rod is fixedly connected to one sides of the two groups of bent plates close to each other. A rotating plate is arranged on the outer wall of the positioning rod on the right side. The inner wall of the rotating plate is rotatably connected to the outer wall of the positioning rod on the right side through a first bearing. The bent plates are used to fix the position of the rotating plate.

[0012] According to the above technical solution, a pulling plate is arranged on the outer wall of the positioning rod on the left side. The inner wall of the pulling plate is rotatably connected to the outer wall of the positioning rod on the left side through a second bearing. A suspension rod is fixedly connected to the bottom of the pulling plate. The pulling plate is used to drive the suspension rod to rotate.

[0013] According to the above technical solution, a second resilient rod is fixedly connected to one side of the hanging rod away from the pulling plate, and an insertion plate is fixedly connected to one side of the second resilient rod away from the hanging rod. The fixing mechanism is provided in two groups and is symmetrically arranged with the middle of the top plate as the main line. This insertion plate is used to fix the fitting plate and prevent it from moving further.

[0014] Compared with the prior art, the present invention provides a high-strength wide-temperature-range nickel alloy fastener processing and cooling device, which has the following beneficial effects: 1. By setting the pulling mechanism, the present invention can adjust the water cooling time of the fasteners according to the unique cooling requirements of various fasteners. After the cooling process is completed, the elastic force of the elastic rope is used to automatically drive the fasteners to reset, and the entire operation process is simple and efficient.

[0015] 2. By setting the clamping mechanism, when it is necessary to dry the fasteners, the collective drying operation can be completed at one time. When the clamped fasteners come into contact with the sponge plate, the resilience generated by the pulling mechanism will cause a vibration phenomenon. This vibration can drive the fasteners to shake, enabling the sponge plate to wipe all around the fasteners, improving the drying effect and wiping efficiency of the fasteners.

[0016] 3. By setting the fixing mechanism, when fixing the fitting plate, it will not completely restrict it. This mechanism allows the fitting plate to still be able to move slightly while being restricted, thereby ensuring that the fitting plate can generate vibrations. This vibration characteristic can prompt the fasteners to move more effectively in a shaking manner.

[0017] 4. By setting the limiting plate, when clamping the sponge plate, the effective clamping of the sponge plate can be achieved by using the irregular arc of the limiting plate itself, which can avoid excessive contact between the sponge plate and the fasteners, thereby preventing the sponge plate from falling due to contact problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the present invention; Figure 2 is a structural sectional view of the present invention; Figure 3 is a structural schematic diagram of the pulling mechanism of the present invention; Figure 4 is a structural schematic diagram of the contact fast of the present invention; Figure 5 is a structural schematic diagram of the top plate of the present invention; Figure 6 is a structural schematic diagram of the clamping mechanism of the present invention; Figure 7 is a structural schematic diagram of the pushing plate of the present invention; Figure 8This is a schematic structural diagram of the fixing mechanism of the present invention.

[0019] In the figure: 1, support legs; 2, fixing blocks; 3, water storage tanks; 4, pulling mechanisms; 401, fitting plates; 402, first rotating plates; 403, contact blocks; 404, second rotating plates; 405, rectangular blocks; 406, elastic ropes; 407, sliding blocks; 408, arc-shaped grooves; 5, clamping mechanisms; 501, top plates; 502, sponge plates; 503, first rebounding rods; 504, protective shells; 505, limiting plates; 506, pushing plates; 507, springs; 6, fixing mechanisms; 601, bent plates; 602, rotating plates; 603, positioning rods; 604, pulling plates; 605, suspension rods; 606, second rebounding rods; 607, insertion plates. Specific embodiments

[0020] 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.

[0021] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1: Refer to Figures 1 - 4 , the present invention provides a technical solution: a high-strength wide-temperature-range nickel alloy fastener processing and cooling device, including four groups of support legs 1, and fixing blocks 2 are fixedly connected to the tops of the four groups of support legs 1. A water storage tank 3 is opened in the inner wall of the fixing block 2. It further includes: Pulling mechanism 4, the pulling mechanism 4 includes a fitting plate 401, the fitting plate 401 is installed on the top of the fixed block 2, both left and right sides of the fitting plate 401 are fixedly connected with contact blocks 403, one side of each of the two groups of contact blocks 403 away from the fitting plate 401 is fixedly connected with a first rotating plate 402, arc-shaped grooves 408 are formed on the outer walls of the two groups of first rotating plates 402. The arc-shaped grooves 408 can restrict the sliding block 407. When the first rotating plate 402 no longer fixes the sliding block 407, the fitting plate 401 is no longer restricted by the elastic rope 406, and the staff can independently set the residence time of the fitting plate 401 in the water storage tank 3. Sliding blocks 407 are arranged on the inner walls of the two groups of arc-shaped grooves 408, and one side of each of the two groups of sliding blocks 407 close to the inner wall of the arc-shaped groove 408 is slidably connected with the periphery of the inner wall of the arc-shaped groove 408. One side of each of the two groups of first rotating plates 402 away from the contact blocks 403 is rotatably connected with a second rotating plate 404 through a first rotating shaft. The second rotating plate 404 is used to limit the excessive rotation of the first rotating plate 402. Rectangular blocks 405 are arranged on the outer wall side of each of the two groups of second rotating plates 404 close to the first rotating plate 402. One side of each of the two groups of rectangular blocks 405 close to the second rotating plate 404 is fixedly connected with the outer wall of the second rotating plate 404. Elastic ropes 406 are arranged on one side of each of the two groups of rectangular blocks 405 away from the second rotating plate 404. The arc-shaped groove 408 is used to restrict the movement of the sliding block 407. One side of each of the two groups of elastic ropes 406 close to the sliding block 407 is fixedly connected with the top of the sliding block 407. One side of each of the two groups of elastic ropes 406 close to the rectangular block 405 is fixedly connected with the outer wall of the rectangular block 405. The elastic rope 406 is used to pull the sliding block 407 to move.

[0024] The working principle of this embodiment is as follows: When the staff places the fastener on the fitting plate 401, push the sliding block 407 to slide in the arc-shaped groove 408. When the sliding block 407 moves out of the notch of the arc-shaped groove 408, the first rotating plate 402 loses its restriction and then rotates downward, driving the contact block 403 to move downward synchronously. The downward movement of the contact block 403 further drives the fitting plate 401 to move downward synchronously, so that the fitting plate 401 enters the water storage tank 3. At this time, the liquid in the water storage tank 3 cools the fastener on the fitting plate 401. After the fastener is cooled, the staff slides the sliding block 407 again to move it into the semi-circular notch of the arc-shaped groove 408, and the notch immediately fixes the sliding block 407. During the sliding process of the sliding block 407, the elastic rope 406 will be stretched. When the sliding block 407 is fixed at the notch, the elastic rope 406 loses its tensile force and starts to rebound, driving the first rotating plate 402 to rotate upward. The upward rotation of the first rotating plate 402 drives the contact block 403 to move upward synchronously, and then the fitting plate 401 moves upward synchronously, and the pulling mechanism 4 is thus reset.

[0025] Embodiment 2: Please refer to Figures 5 - 7, on the basis of Embodiment 1, the present invention provides a technical solution: further comprising a clamping mechanism 5, the clamping mechanism 5 includes a top plate 501, one side of the top plate 501 close to the fixed block 2 is fixedly connected to the outer wall of the fixed block 2, both the left and right sides of the top plate 501 are rotatably connected to the second rotating plate 404 through a second rotating shaft, and the top plate 501 is used to limit the second rotating plate 404. Two groups of first elastic rods 503 are arranged on the inner wall of the top plate 501. One side of the two groups of first elastic rods 503 close to the top plate 501 is fixedly connected to the inner wall of the top plate 501. One side of the two groups of first elastic rods 503 close to each other is fixedly connected with a protective shell 504. The first elastic rod 503 is used to fix the position of the protective shell 504. Two groups of springs 507 are arranged on the inner walls of the two groups of protective shells 504. After the springs 507 are arranged, the elastic force of the springs 507 can be used to push the push plate 506. Since the head of the push plate 506 is in an inclined shape, when clamping the sponge plate 502, it can fix it more firmly to ensure the clamping effect. One side of the four groups of springs 507 close to the inner wall of the protective shell 504 is fixedly connected to the inner wall of the protective shell 504. One side of the four groups of springs 507 away from the inner wall of the protective shell 504 is fixedly connected with a push plate 506. One side of the four groups of push plates 506 close to each other is fixedly connected with a limiting plate 505. By arranging the limiting plate 505, it can ensure the effective fixation of the sponge plate 502, so that the sponge plate 502 will not fall off when contacting the fastener. One side of the two groups of limiting plates 505 close to each other is in contact with the sponge plate 502. The spring 507 is used to push the push plate 506 to move.

[0026] The working principle of this embodiment is as follows: When the staff needs to clamp the sponge plate 502, press the push plate 506 to make it move into the protective shell 504. During the movement of the push plate 506, the spring 507 will be compressed and contracted, and at the same time, the limiting plate 505 will be driven to move synchronously. At this time, the staff installs the sponge plate 502 in the middle of the limiting plate 505, and then releases the push plate 506. The spring 507 will immediately rebound, push the push plate 506 to move, and then drive the limiting plate 505 to move synchronously. The limiting plate 505 will clamp and fix the sponge plate 502. After the sponge plate 502 is fixed, the pulling mechanism 4 is reset, causing the fastener to contact the sponge plate 502. After the elastic rope 406 is reset, it will cause repeated shaking, drive the first rotating plate 402 to shake, and then make the fastener shake in the fitting plate 401. While shaking, the fastener will also move in position and rotate during the movement, ensuring that the sponge plate 502 can dry the periphery of the fastener, so that the water stains on the outer wall of the fastener can be absorbed, ensuring that no manual secondary drying is required. Thus, the work is completed.

[0027] Embodiment 3: Please refer to Figure 8, on the basis of the first and second embodiments, the present invention provides a technical solution: further including a fixing mechanism 6, the fixing mechanism 6 includes two groups of bent plates 601, one side of the two groups of bent plates 601 close to the top plate 501 is fixedly connected to the top of the top plate 501, and a positioning rod 603 is fixedly connected to the side of the two groups of bent plates 601 close to each other. A rotating plate 602 is arranged on the outer wall of the positioning rod 603 on the right side. The inner wall of the rotating plate 602 is rotatably connected to the outer wall of the positioning rod 603 on the right side through a first bearing. This bent plate 601 is used to fix the position of the rotating plate 602. A pulling plate 604 is arranged on the outer wall of the positioning rod 603 on the left side. By setting the pulling plate 604, the hanging rod 605 can be driven to rotate in time, so as to ensure that the insertion plate 607 can fix the fitting plate 401 in time, so as to ensure that the fitting plate 401 will not contact the top plate 501 due to the too fast reset of the pulling mechanism 4. The inner wall of the pulling plate 604 is rotatably connected to the outer wall of the positioning rod 603 on the left side through a second bearing. The bottom of the pulling plate 604 is fixedly connected to a hanging rod 605. This pulling plate 604 is used to drive the hanging rod 605 to rotate. One side of the hanging rod 605 away from the pulling plate 604 is fixedly connected to a second elastic rod 606. After setting the second elastic rod 606, even if the insertion plate 607 is inside the fitting plate 401, the fitting plate 401 can still shake slightly. This design can ensure that when the fastener contacts the panel, it will not be limited to a single contact surface, thereby effectively expanding the wiping range of the sponge plate 502. One side of the second elastic rod 606 away from the hanging rod 605 is fixedly connected to an insertion plate 607. The fixing mechanism 6 is provided with two groups and is symmetrically arranged with the middle of the top plate 501 as the main line. This insertion plate 607 is used to fix the fitting plate 401 and prevent it from moving further.

[0028] The working principle of this embodiment is as follows: when the fitting plate 401 moves upward, it will push the rotating plate 602 to rotate. During the rotation of the rotating plate 602, it will push the pulling plate 604 at the top to rotate on the positioning rod 603. While the pulling plate 604 rotates, it drives the hanging rod 605 at the bottom to rotate synchronously. The rotation of the hanging rod 605 drives the second elastic rod 606 to rotate. When the second elastic rod 606 rotates, it drives the insertion plate 607 to rotate synchronously. When the insertion plate 607 rotates, the insertion rod will contact the outer wall of the fitting plate 401, slide a certain distance first, and then insert into the hole of the fitting plate 401, thereby restricting the fitting plate 401 and making it in a fixed position state to ensure that the fitting plate 401 will not move down.

[0029] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. High-strength wide-temperature-range nickel alloy fastener processing cooling device, including four groups of support legs (1), the tops of the four groups of support legs (1) are fixedly connected with fixing blocks (2), and a water storage tank (3) is opened on the inner wall of the fixing block (2), characterized in that, Further comprising: A pulling mechanism (4), the pulling mechanism (4) includes a fitting plate (401), the fitting plate (401) is installed on the top of the fixed block (2), both the left and right sides of the fitting plate (401) are fixedly connected with contact blocks (403), one side of each of the two groups of contact blocks (403) away from the fitting plate (401) is fixedly connected with a first rotating plate (402), one side of each of the two groups of first rotating plates (402) away from the contact blocks (403) is rotatably connected with a second rotating plate (404) through a first rotating shaft, and the second rotating plate (404) is used to limit the excessive rotation of the first rotating plate (402).

2. The high-strength wide-temperature-range nickel alloy fastener processing cooling device according to claim 1, wherein: Arc-shaped grooves (408) are formed in the outer walls of both the two groups of first rotating plates (402), sliding blocks (407) are arranged on the inner walls of both the two groups of arc-shaped grooves (408), one side of each of the two groups of sliding blocks (407) close to the inner wall of the arc-shaped groove (408) is slidably connected with the inner wall around the arc-shaped groove (408), rectangular blocks (405) are arranged on one side of the outer walls of both the two groups of second rotating plates (404) close to the first rotating plates (402), one side of each of the two groups of rectangular blocks (405) close to the second rotating plate (404) is fixedly connected with the outer wall of the second rotating plate (404), elastic ropes (406) are arranged on one side of each of the two groups of rectangular blocks (405) away from the second rotating plate (404), one side of each of the two groups of elastic ropes (406) close to the sliding block (407) is fixedly connected with the top of the sliding block (407), and one side of each of the two groups of elastic ropes (406) close to the rectangular block (405) is fixedly connected with the outer wall of the rectangular block (405), and the elastic rope (406) is used to pull the sliding block (407) to move.

3. The high-strength wide-temperature-range nickel alloy fastener processing cooling device according to claim 1, wherein: Further comprising a clamping mechanism (5), the clamping mechanism (5) includes a top plate (501), one side of the top plate (501) close to the fixed block (2) is fixedly connected with the outer wall of the fixed block (2), both the left and right sides of the top plate (501) are rotatably connected with the second rotating plate (404) through a second rotating shaft, and the top plate (501) is used to limit the second rotating plate (404).

4. The high-strength wide-temperature-range nickel alloy fastener processing and cooling device according to claim 3, characterized in that: Two groups of first rebounding rods (503) are arranged on the inner wall of the top plate (501), one side of each of the two groups of first rebounding rods (503) close to the top plate (501) is fixedly connected with the inner wall of the top plate (501), and one side of each of the two groups of first rebounding rods (503) close to each other is fixedly connected with a protective shell (504), and the first rebounding rod (503) is used to fix the position of the protective shell (504).

5. The high-strength wide-temperature-range nickel alloy fastener processing cooling device according to claim 4, characterized in that: On the inner walls of the two groups of the protective cases (504), two groups of springs (507) are provided. One side of the four groups of springs (507) close to the inner walls of the protective cases (504) is fixedly connected to the inner walls of the protective cases (504). One side of the four groups of springs (507) away from the inner walls of the protective cases (504) is fixedly connected with a push plate (506). One side of the four groups of push plates (506) close to each other is fixedly connected with a limiting plate (505). One side of the two groups of limiting plates (505) close to each other is in contact with the sponge plate (502). The springs (507) are used to push the push plates (506) to move.

6. The high-strength wide-temperature-range nickel alloy fastener processing cooling device according to claim 5, wherein: It further includes a fixing mechanism (6). The fixing mechanism (6) includes two groups of bent plates (601). One side of the two groups of bent plates (601) close to the top plate (501) is fixedly connected to the top of the top plate (501). One side of the two groups of bent plates (601) close to each other is fixedly connected with a positioning rod (603). On the outer wall of the positioning rod (603) on the right side, a rotating plate (602) is provided. The inner wall of the rotating plate (602) is rotatably connected to the outer wall of the positioning rod (603) on the right side through a first bearing. The bent plates (601) are used to fix the position of the rotating plate (602).

7. The high-strength wide-temperature-range nickel alloy fastener processing cooling device according to claim 6, characterized in that: On the outer wall of the positioning rod (603) on the left side, a pulling plate (604) is provided. The inner wall of the pulling plate (604) close to the outer wall of the positioning rod (603) on the left side is rotatably connected through a second bearing. The bottom of the pulling plate (604) is fixedly connected with a hanging rod (605). The pulling plate (604) is used to drive the hanging rod (605) to rotate.

8. The high-strength wide-temperature-range nickel alloy fastener processing cooling device according to claim 7, wherein: One side of the hanging rod (605) away from the pulling plate (604) is fixedly connected with a second resilient rod (606). One side of the second resilient rod (606) away from the hanging rod (605) is fixedly connected with an insertion plate (607). The fixing mechanism (6) is provided with two groups and is symmetrically arranged with the middle of the top plate (501) as the main line. The insertion plate (607) is used to fix the fitting plate (401) so that it no longer moves.

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