Building adjustable aluminum mold material conveying opening forming device

Abstract

The utility model provides a building adjustable aluminum mold material transfer port forming device, which relates to the field of building aluminum molds, and comprises four L-shaped assembly aluminum plates and a plurality of inclined plane assembly aluminum boxes, the outer surface of each L-shaped assembly aluminum plate and the outer surface of each inclined plane assembly aluminum box are fixedly connected with a sliding strip for butt joint and a sliding way for butt joint; the sliding strip for butt joint is matched with the sliding way for butt joint. According to the building adjustable aluminum mold material conveying opening forming device, a forming mold of a material conveying opening can be formed through assembly and combination, adjustment can be conducted according to the actual size of materials, workers can adjust the size of the formed material conveying opening, operation is convenient, simple and easy to learn, the flexibility of the material conveying opening forming mold is improved, and the production efficiency is improved. And meanwhile, the jacking and stabilizing plate moves upwards to jack the building aluminum formwork on the top layer, so that the transfer port forming mold is fixed, and the problem that the forming surface of the transfer port is difficult to flatten due to the fact that the formed transfer port is affected by loosening of the forming mold is effectively solved.

Description

Technical Field

[0001] The utility model relates to a molding device, in particular to an adjustable aluminum mold material transfer port molding device for buildings, belonging to the technical field of aluminum molds for buildings. Background Art

[0002] With the rapid development of high-rise and super-high-rise buildings, formwork technology has become an important construction tool in large quantities and wide range in building construction. Due to the extensive use of wood plywood formworks, a large number of trees have been cut down. Therefore, under the situation of vigorously promoting energy conservation and emission reduction, aluminum alloy formworks have been produced. Aluminum alloy formworks have replaced traditional wooden formwork systems with the characteristics of high turnover times, easy installation, low cost, saving wood resources, and improving the engineering quality of cast-in-place structures.

[0003] Aluminum alloy formwork is mainly used for cement pouring in high-rise buildings. Generally, workers assemble multiple aluminum plates on the basis of the top floor section to form a huge hollow mold, and then pour cement into the huge mold as a whole. After the cement solidifies, the aluminum plates are disassembled and separated to obtain a cast wall. However, in the aluminum mold system, in order to facilitate the transportation of materials between the upper and lower floors, a material transfer port is generally reserved at the top of the floor to achieve simple manual transfer of materials between layers, and the mold used for forming the material transfer port is an aluminum mold material transfer port forming device. However, the current aluminum mold material transfer port forming devices are all ordinary aluminum alloy shells, which are simply placed in a preset place during pouring. This type of aluminum mold material transfer port forming device has a simple structure and is easy to loosen, affecting the material transfer port after forming, resulting in difficulty in leveling the material transfer port forming surface.

[0004] On the other hand, after searching, the patent number CN111360974B disclosed an aluminum mold feed port forming device and forming method. The device can avoid interference between the aluminum mold feed port forming device and the concrete leveler and trowel machine and improve construction efficiency. However, it is difficult for the above device to adjust the size of the feed port after forming according to the size of the materials transported between the upper and lower layers. Due to the differences in the main body of the building, the sizes of the materials transported between the upper and lower layers are different, and the size of the aluminum mold feed port forming device is usually fixed. It is difficult to adjust the aluminum mold feed port forming device to a suitable size according to the size of the transported materials, thereby reducing the flexibility of the aluminum mold feed port forming device when using it. To this end, we provide a building adjustable aluminum mold feed port forming device to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] The purpose of the utility model is to provide an adjustable aluminum mold material transfer port forming device for building in order to solve the above-mentioned problems, so as to solve the problem in the prior art that it is difficult to adjust the aluminum mold material transfer port forming device to a suitable size according to the size of the transported material.

[0007] (II) Technical solution

[0008] The utility model is realized through the following technical scheme: a building adjustable aluminum mold material transfer port forming device, comprising four L-shaped assembled aluminum plates and a plurality of inclined surface assembled aluminum boxes, the outer surfaces of each of the L-shaped assembled aluminum plates and the inclined surface assembled aluminum boxes are fixedly connected with a docking slide bar and a docking slideway, the docking slide bar and the docking slideway are adapted, and the outside of each of the L-shaped assembled aluminum plates is provided with a stabilizing mechanism, the stabilizing mechanism comprises a connecting spindle, the bottom end of the connecting spindle is fixedly connected with a top pressure stabilizing plate adapted to the L-shaped assembled aluminum plate, and the inside of each of the inclined surface assembled aluminum boxes is provided with a limiting mechanism, the limiting mechanism comprises a push-pull long rod, the outer surface of the push-pull long rod is hinged with four hinged rods two through a pin shaft, the four hinged rods two are hinged with a clamping limit column at one end away from the push-pull long rod through a pin shaft, the four clamping limit columns all penetrate the inner wall of the inclined surface assembled aluminum box and are slidably connected to the inclined surface assembled aluminum box, and each of the docking The surfaces of the slide bar and the docking slideway are provided with four clamping limit grooves matched with the clamping limit columns. When assembling first, four L-shaped assembly aluminum plates and multiple inclined surface assembly aluminum boxes are assembled and combined through the docking slide bars and the docking slideways thereon. The L-shaped assembly aluminum plate and the inclined surface assembly aluminum box are combined and two adjacent inclined surface assembly aluminum boxes are combined at the same time. When assembling the inclined surface assembly aluminum box with the L-shaped assembly aluminum plate, the push-pull long rod is pulled to pass through the clamping limit column and insert it into the clamping limit groove on the L-shaped assembly aluminum plate to limit the adjacent L-shaped assembly aluminum plates and the inclined surface assembly aluminum box. The inclined surface assembly aluminum box and the inclined surface assembly aluminum box are assembled in the same way. The assembly and combination are formed into a forming mold with a square material transfer port. Since this assembly combination has high flexibility, it can be adjusted according to the actual size of the material, so that the worker can adjust the size of the material transfer port after forming.

[0009] Preferably, the outer surface of the L-shaped assembly aluminum plate is fixedly connected to a supporting fixing plate, the outer surface of the supporting fixing plate is fixedly connected to a fixed slide rail, the inner wall of the fixed slide rail is slidably connected to a threaded sliding block, the inner wall of the fixed slide rail is rotatably connected to a one-way threaded rod, the one-way threaded rod is threadedly connected to the threaded sliding block, and the threaded sliding block is slidably connected to the fixed slide rail, thereby increasing the stability of the threaded sliding block during movement and avoiding deviation of the threaded sliding block during movement.

[0010] Preferably, the outer surface of the threaded sliding block is hinged with a hinged rod 1 through a pin shaft, and the end of the hinged rod 1 away from the threaded sliding block is hinged with a drag plate through a pin shaft. The drag plate is rotatably connected to the connecting main shaft, and rotating the one-way threaded rod will drive the threaded sliding block to move. When the threaded sliding block moves, it will drive the drag plate to move up and down through the hinged rod 1, thereby causing the drag plate to drive the connecting main shaft to move up and down.

[0011] Preferably, the connecting main shaft passes through the outer surface of the supporting fixing plate and is slidably connected to the supporting fixing plate. The bottom surface of the supporting fixing plate is fixedly connected with a fixed sliding tube. The fixed sliding tube is slidably connected to the connecting main shaft. Through the setting of the fixed sliding tube, the stability of the connecting main shaft when moving up and down is increased, and the displacement of the connecting main shaft when moving up and down, which leads to the weakening of the clamping force of the top pressure stabilizing plate, is avoided.

[0012] Preferably, the inner wall of the fixed sliding tube is fixedly connected to two fixed sliding blocks, and the outer surface of the connecting main shaft is provided with two threaded grooves matched with the fixed sliding blocks. The two fixed sliding blocks are respectively slidably connected to the two threaded grooves. When disassembling the material transfer port forming mold, the one-way threaded rod is rotated in the opposite direction to move the connecting main shaft downward. The threaded groove is affected by the fixed sliding block to rotate the connecting main shaft 90 degrees to the inside, so that the staff can directly separate the material transfer port forming mold from the wall, which is convenient and quick.

[0013] Preferably, the top end of the push-pull rod passes through the inner wall of the sloped assembly aluminum box and is slidably connected to the sloped assembly aluminum box, the inner wall of the sloped assembly aluminum box is fixedly connected with a fixed sleeve, and the bottom end of the push-pull rod is fixedly connected with a sliding circular plate, and the sliding circular plate is slidably connected to the inner wall of the fixed sleeve. The sliding circular plate slides on the inner wall of the fixed sleeve to increase the stability of the push-pull rod when it moves up and down. When the staff pulls the push-pull rod to move downward, the push-pull rod will drive the card-connected limit column to retract into the sloped assembly aluminum box through the hinge rod 2.

[0014] Preferably, a telescopic spring is fixedly connected to the bottom surface of the sliding circular plate, and one end of the telescopic spring away from the sliding circular plate is fixedly connected to the inner bottom wall of the fixed sleeve. Through the setting of the telescopic spring, the sliding circular plate is subjected to the spring pressure of the telescopic spring, so that the sliding circular plate presses the push-pull long rod upward, and then the push-pull long rod presses the clamping limit column to the outside of the inclined surface assembly aluminum box through the second hinge rod, thereby maintaining the clamping state of the clamping limit column and the clamping limit groove.

[0015] The utility model provides a building adjustable aluminum mold material transfer port forming device, which has the following beneficial effects:

[0016] 1. The utility model is provided with an L-shaped assembly aluminum plate, an inclined surface assembly aluminum box and a limiting mechanism. When the size of the material transfer port after forming needs to be adjusted according to the size of the transported material, four L-shaped assembly aluminum plates and multiple inclined surface assembly aluminum boxes are assembled and combined through the docking slide bars and docking slideways thereon, and the L-shaped assembly aluminum plate and the inclined surface assembly aluminum box are combined through the docking slide bars and docking slideways on the L-shaped assembly aluminum plate and the inclined surface assembly aluminum box. At the same time, two adjacent inclined surface assembly aluminum boxes are combined, and at the same time, two adjacent parts are limited by inserting the clamping limiting column into the clamping limiting groove, and the assembly and combination are formed to form a forming mold for the material transfer port. Since the flexibility of this assembly combination is high, it can be adjusted according to the actual size of the material, so that the worker can adjust the size of the material transfer port after forming, and the operation is convenient, simple and easy to learn, thereby improving the flexibility of the material transfer port forming mold.

[0017] 2. The utility model is provided with a stabilizing mechanism. After the device is combined multiple times to form a material transfer port forming mold, the material transfer port forming mold is placed on the top layer of the building aluminum formwork, and the one-way threaded rod is rotated to drive the connecting spindle under the drag plate to move upward through the hinge rod, so that the top pressure stabilizing plate moves upward to press the top layer of the building aluminum formwork, so that the material transfer port forming mold is fixed, and the problem of the loosening of the forming mold affecting the material transfer port after forming and causing the material transfer port forming surface to be difficult to be flat is effectively avoided. At the same time, when disassembling the material transfer port forming mold, the one-way threaded rod is rotated in the opposite direction to move the connecting spindle downward. The threaded slide groove is affected by the fixed slider to rotate the connecting spindle 90 degrees to the inside, so that the staff can directly separate the material transfer port forming mold from the wall, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model after assembly;

[0019] Figure 2 It is a schematic diagram of the split structure of the utility model;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the utility model when the L-shaped assembly aluminum plate and the inclined assembly aluminum box are assembled;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the interior of the aluminum box with inclined surface assembly according to the utility model;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure inside the fixed sleeve of the utility model;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the stabilizing mechanism of the utility model;

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the fixed sliding block of the utility model.

[0025]

Main component symbol description

[0026] 1. L-shaped aluminum plate; 2. Inclined aluminum box; 3. Slide bar for docking; 4. Slide rail for docking; 5. Clamping limit groove;

[0027] 6. Stabilizing mechanism; 601. Supporting fixed plate; 602. Fixed slide rail; 603. Threaded sliding block; 604. One-way threaded rod; 605. Articulated rod 1; 606. Drag plate; 607. Connecting spindle; 608. Fixed slide tube; 609. Fixed slide block; 610. Threaded slide groove; 611. Top pressure stabilizing plate;

[0028] 7. Limiting mechanism; 701. Push-pull long rod; 702. Articulated rod 2; 703. Snap-fit ​​limiting column; 704. Fixed sleeve; 705. Sliding circular plate; 706. Telescopic spring. DETAILED DESCRIPTION

[0029] The utility model embodiment provides a building adjustable aluminum mold material transfer port forming device.

[0030] See also Figure 1 , Figure 2 , Figure 6 and Figure 7 , including four L-shaped assembly aluminum plates 1 and a plurality of inclined surface assembly aluminum boxes 2, the outer surfaces of each L-shaped assembly aluminum plate 1 and the inclined surface assembly aluminum box 2 are fixedly connected with a docking slide bar 3 and a docking slideway 4, the docking slide bar 3 and the docking slideway 4 are adapted, and the outer surface of each L-shaped assembly aluminum plate 1 is provided with a stabilizing mechanism 6, the stabilizing mechanism 6 includes a connecting spindle 607, the bottom end of the connecting spindle 607 is fixedly connected with a top pressure stabilizing plate 611 adapted to the L-shaped assembly aluminum plate 1, and the outer surface of the L-shaped assembly aluminum plate 1 is fixed A supporting fixed plate 601 is connected, and a fixed slide rail 602 is fixedly connected to the outer surface of the supporting fixed plate 601. A threaded sliding block 603 is slidably connected to the inner wall of the fixed slide rail 602. A one-way threaded rod 604 is rotatably connected to the inner wall of the fixed slide rail 602. The one-way threaded rod 604 is threadedly connected to the threaded sliding block 603, and the threaded sliding block 603 is slidably connected to the fixed slide rail 602, thereby increasing the stability of the threaded sliding block 603 when it moves and avoiding deviation of the threaded sliding block 603 when it moves.

[0031] The outer surface of the threaded sliding block 603 is hinged with a hinged rod 605 through a pin shaft, and the end of the hinged rod 605 away from the threaded sliding block 603 is hinged with a drag plate 606 through a pin shaft. The drag plate 606 is rotatably connected to the connecting main shaft 607. Rotating the one-way threaded rod 604 will drive the threaded sliding block 603 to move. When the threaded sliding block 603 moves, it will drive the drag plate 606 to move up and down through the hinged rod 605, so that the drag plate 606 drives the connecting main shaft 607 to move up and down.

[0032] The connecting main shaft 607 passes through the outer surface of the supporting fixed plate 601 and is slidably connected to the supporting fixed plate 601. The bottom surface of the supporting fixed plate 601 is fixedly connected with a fixed slide tube 608. The fixed slide tube 608 is slidably connected to the connecting main shaft 607. Through the setting of the fixed slide tube 608, the stability of the connecting main shaft 607 when moving up and down is increased, and the displacement of the connecting main shaft 607 when moving up and down is avoided, which leads to the weakening of the clamping force of the top pressure stabilizing plate 611.

[0033] Two fixed slide blocks 609 are fixedly connected to the inner wall of the fixed slide tube 608, and two threaded grooves 610 matched with the fixed slide blocks 609 are provided on the outer surface of the connecting main shaft 607. The two fixed slide blocks 609 are respectively slidably connected with the two threaded grooves 610. When disassembling the material transfer port forming mold, the one-way threaded rod 604 is rotated in the opposite direction to move the connecting main shaft 607 downward. The threaded groove 610 is affected by the fixed slide block 609 to rotate the connecting main shaft 607 90 degrees inward, so that the staff can directly separate the material transfer port forming mold from the wall, which is convenient and quick.

[0034] See also Figure 3 , Figure 4 ,and Figure 5 A limiting mechanism 7 is arranged inside each inclined-surface assembled aluminum box 2, and the limiting mechanism 7 comprises a push-pull long rod 701, and the outer surface of the push-pull long rod 701 is hinged with four hinged rods 702 through a pin shaft, and the four hinged rods 702 are hinged with a clamping limiting column 703 at one end away from the push-pull long rod 701 through a pin shaft, and the four clamping limiting columns 703 all penetrate the inner wall of the inclined-surface assembled aluminum box 2 and are slidably connected with the inclined-surface assembled aluminum box 2, and the surface of each docking slide bar 3 and the docking slideway 4 is provided with four clamping limiting grooves 5 matched with the clamping limiting columns 703.

[0035] The top end of the push-pull long rod 701 passes through the inner wall of the inclined surface assembly aluminum box 2 and is slidably connected to the inclined surface assembly aluminum box 2. The inner wall of the inclined surface assembly aluminum box 2 is fixedly connected with a fixed sleeve 704. The bottom end of the push-pull long rod 701 is fixedly connected with a sliding circular plate 705. The sliding circular plate 705 is slidably connected to the inner wall of the fixed sleeve 704. The sliding circular plate 705 slides on the inner wall of the fixed sleeve 704 to increase the stability of the push-pull long rod 701 when it moves up and down. When the staff pulls the push-pull long rod 701 to move downward, the push-pull long rod 701 will drive the card-connected limit column 703 to retract into the inclined surface assembly aluminum box 2 through the hinge rod 2 702.

[0036] The bottom surface of the sliding circular plate 705 is fixedly connected with a telescopic spring 706, and one end of the telescopic spring 706 away from the sliding circular plate 705 is fixedly connected to the inner bottom wall of the fixed sleeve 704. Through the setting of the telescopic spring 706, the sliding circular plate 705 is subjected to the spring pressure of the telescopic spring 706, so that the sliding circular plate 705 presses the push-pull long rod 701 upward, and then the push-pull long rod 701 presses the clamping limit column 703 to the outside of the inclined surface assembly aluminum box 2 through the hinge rod 2 702, thereby maintaining the clamping state of the clamping limit column 703 and the clamping limit groove 5.

[0037] When the utility model is in use: first, during assembly, four L-shaped assembly aluminum plates 1 and multiple inclined surface assembly aluminum boxes 2 are assembled and combined through the docking slide bars 3 and the docking slideways 4 thereon, and the L-shaped assembly aluminum plate 1 and the inclined surface assembly aluminum box 2 are combined through the docking slide bars 3 and the docking slideways 4 on the L-shaped assembly aluminum plate 1 and the inclined surface assembly aluminum box 2. At the same time, two adjacent inclined surface assembly aluminum boxes 2 are combined. When the inclined surface assembly aluminum box 2 is assembled with the L-shaped assembly aluminum plate 1, the push-pull long rod 701 is pulled and inserted into the clamping limit groove 5 on the L-shaped assembly aluminum plate 1 through the clamping limit column 703 to limit the adjacent L-shaped assembly aluminum plates 1 and the inclined surface assembly aluminum box 2. The inclined surface assembly aluminum box 2 and the inclined surface assembly aluminum box 2 are assembled in the same way. The assembly and combination are used to form a forming mold with a square material transfer port. Since this assembly combination has high flexibility, it can be adjusted according to the actual size of the material, so that the worker can adjust the size of the material transfer port after forming.

[0038] After the device is combined multiple times to form a transfer port forming mold, the transfer port forming mold is placed on the top layer of the building aluminum formwork, and the one-way threaded rod 604 is rotated to drive the connecting main shaft 607 under the drag plate 606 to move upward through the hinge rod 605, so that the top pressure stabilizing plate 611 moves upward to press the top layer of the building aluminum formwork, so that the transfer port forming mold is fixed, effectively avoiding the problem that the loosening of the forming mold affects the transfer port after forming and makes it difficult to level the forming surface of the transfer port.

[0039] When disassembling the material transfer port forming mold, the one-way threaded rod 604 is rotated in the opposite direction to move the connecting spindle 607 downward. The threaded groove 610 is affected by the fixed slider 609 to rotate the connecting spindle 607 90 degrees inward, so that the staff can directly separate the material transfer port forming mold from the wall, which is convenient and quick. At the same time, the push-pull long rod 701 on the inclined surface assembly aluminum box 2 is pulled to retract the clamping limit column 703 into the inclined surface assembly aluminum box 2. The staff can then separate the inclined surface assembly aluminum box 2 from the adjacent L-shaped assembly aluminum plate 1 or the inclined surface assembly aluminum box 2. The disassembled material transfer port forming mold is convenient for storage and transportation.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A building adjustable aluminum mold material transfer port forming device, comprising four L-shaped assembly aluminum plates (1) and a plurality of inclined surface assembly aluminum boxes (2), characterized in that: The outer surfaces of each of the L-shaped assembly aluminum plate (1) and the inclined surface assembly aluminum box (2) are fixedly connected with a butt-jointing slide bar (3) and a butt-jointing slideway (4), and the butt-jointing slide bar (3) and the butt-jointing slideway (4) are matched with each other. The outside of each of the L-shaped assembly aluminum plate (1) is provided with a stabilizing mechanism (6), and the stabilizing mechanism (6) includes a connecting spindle (607), and the bottom end of the connecting spindle (607) is fixedly connected with a top pressure stabilizing plate (611) matched with the L-shaped assembly aluminum plate (1). The inside of each of the inclined surface assembly aluminum box (2) is provided with a limiting mechanism (7). The limiting mechanism (7) comprises a push-pull long rod (701), the outer surface of which is hinged with four hinged rods (702) via a pin, and one end of the four hinged rods (702) away from the push-pull long rod (701) is hinged with a clamping limiting column (703) via a pin, and the four clamping limiting columns (703) all penetrate the inner wall of the inclined surface assembly aluminum box (2) and are slidably connected to the inclined surface assembly aluminum box (2), and the surface of each of the docking slide bar (3) and the docking slideway (4) is provided with four clamping limiting grooves (5) that are compatible with the clamping limiting columns (703).

2. The building adjustable aluminum mold material transfer port forming device according to claim 1, characterized in that: The outer surface of the L-shaped assembly aluminum plate (1) is fixedly connected to a support fixing plate (601), the outer surface of the support fixing plate (601) is fixedly connected to a fixed slide rail (602), the inner wall of the fixed slide rail (602) is slidably connected to a threaded sliding block (603), the inner wall of the fixed slide rail (602) is rotatably connected to a one-way threaded rod (604), and the one-way threaded rod (604) is threadedly connected to the threaded sliding block (603).

3. The building adjustable aluminum mold material transfer port forming device according to claim 2, characterized in that: The outer surface of the threaded sliding block (603) is hinged with a hinged rod (605) via a pin shaft, and the end of the hinged rod (605) away from the threaded sliding block (603) is hinged with a drag plate (606) via a pin shaft, and the drag plate (606) is rotatably connected to the connecting main shaft (607).

4. The building adjustable aluminum mold material transfer port forming device according to claim 2, characterized in that: The connecting main shaft (607) passes through the outer surface of the supporting fixing plate (601) and is slidably connected to the supporting fixing plate (601); the bottom surface of the supporting fixing plate (601) is fixedly connected with a fixed sliding tube (608); and the fixed sliding tube (608) is slidably connected to the connecting main shaft (607).

5. The building adjustable aluminum mold material transfer port forming device according to claim 4, characterized in that: The inner wall of the fixed sliding tube (608) is fixedly connected to two fixed sliding blocks (609), and the outer surface of the connecting main shaft (607) is provided with two threaded sliding grooves (610) adapted to the fixed sliding blocks (609), and the two fixed sliding blocks (609) are respectively slidably connected to the two threaded sliding grooves (610).

6. The building adjustable aluminum mold material transfer port forming device according to claim 1, characterized in that: The top end of the push-pull long rod (701) passes through the inner wall of the bevel-mounted aluminum box (2) and is slidably connected to the bevel-mounted aluminum box (2); the inner wall of the bevel-mounted aluminum box (2) is fixedly connected to a fixed sleeve (704); the bottom end of the push-pull long rod (701) is fixedly connected to a sliding circular plate (705); and the sliding circular plate (705) is slidably connected to the inner wall of the fixed sleeve (704).

7. The building adjustable aluminum mold material transfer port forming device according to claim 6, characterized in that: A telescopic spring (706) is fixedly connected to the bottom surface of the sliding circular plate (705), and one end of the telescopic spring (706) away from the sliding circular plate (705) is fixedly connected to the inner bottom wall of the fixed sleeve (704).

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