Recyclable pre-embedded external scaffold wall connecting piece

Abstract

The utility model relates to the technical field of constructional engineering, and discloses a turnover pre-embedded external scaffold wall connecting piece. The wall connecting piece comprises a positioning piece and a rod piece installation piece matched with the positioning piece, the positioning piece comprises a positioning sleeve and a fastening piece, one end of the fastening piece is inserted into one end of the positioning sleeve, the rod piece installation piece comprises a bolt and a clamping piece, the bolt is arranged on the clamping piece in a penetrating mode, the clamping piece is used for clamping a horizontal rod of a scaffold, and the horizontal rod is fixed to the positioning sleeve. After the fastener is pulled out, the bolt is in threaded connection into the positioning sleeve; according to the wall connecting piece, the positioning sleeve is integrally pre-embedded in a beam through the matching of the positioning screw rod and the positioning nut, and then a horizontal rod of a scaffold is connected with the beam through the matching of the detachable rod piece mounting piece, so that the problems that a traditional method conflicts with working faces of subsequent plate face masonry building, breast board concrete pouring and other procedures are solved; and meanwhile, the ending work amount is reduced, the leakage risk is avoided, and the effects of shortening the construction period and reducing the construction cost are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of building engineering technology, specifically relating to a reusable pre-embedded wall tie for external scaffolding. Background Technology

[0002] In the field of construction engineering, for high-rise buildings, scaffolding is often quite tall, and the loads from wind and construction are significant. Wall ties transfer the loads on the scaffolding to the main building structure, preventing the scaffolding from overturning, deforming, or collapsing due to excessive horizontal and vertical forces, thus ensuring construction safety. While traditional scaffolding wall ties have played a role in construction, they also have several problems.

[0003] Currently, the common methods for wall ties in construction projects include flexible and rigid connections. Flexible wall ties are relatively weak in resisting horizontal forces and cannot provide sufficient restraint, which can easily lead to the overall instability of the scaffolding. Although rigid wall ties provide a strong connection, traditional rigid wall ties use steel pipes directly installed on the concrete floor slab. These steel pipes are not reusable, resulting in high costs. The installation and dismantling process is also cumbersome, requiring significant manpower and time. Furthermore, they can conflict with the work surfaces of other subsequent processes, leading to a large amount of finishing work and impacting construction efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a wall connection component with a simple structure and reasonable design in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A reusable pre-embedded external scaffolding wall tie includes a positioning component and a rod mounting component that cooperates with the positioning component. The positioning component includes a positioning sleeve and a fastener. One end of the fastener is inserted into one end of the positioning sleeve. The rod mounting component includes a bolt and a clamping component. The bolt passes through the clamping component, and the clamping component is used to clamp the horizontal rod of the scaffolding. After the fastener is pulled out, the bolt is threaded into the positioning sleeve.

[0007] The clamping member has a locking assembly connected to its surface. The locking assembly includes an outer sleeve, a pressing member, and a tension spring. The outer sleeve is fixedly connected to a set of clamping blocks with bolts. A horizontal bar passes through the inside of the outer sleeve. One end of the pressing member is rotatably connected to the inner wall of the outer sleeve, and the other end of the pressing member presses against the surface of the horizontal bar. One end of the tension spring is connected to the surface of the pressing member away from the horizontal bar, and the other end is connected to the inner wall of the outer sleeve.

[0008] As a further optimization of this utility model, the clamping member includes a connector and two sets of clamping blocks. The ends of the two sets of clamping blocks that are close to each other are rotatably connected by a rotating shaft, and the ends of the two sets of clamping blocks that are away from the rotating shaft are connected by a connector.

[0009] As a further optimization of this utility model, the pressing component includes a pressure block, a rotating rod, and a rotating shaft. One end of the rotating rod is fixedly connected to the rotating shaft, the pressure block is fixedly connected to the other end of the rotating rod, and the tension spring is connected to the surface of the rotating rod.

[0010] As a further optimization of this utility model, the outer sleeve includes a side wall portion and a protrusion portion. The protrusion portion is connected to the inner wall of the side wall portion. A rotating groove is formed on the surface of the protrusion portion. The rotating shaft is rotatably connected in the rotating groove. The end of the tension spring away from the rotating rod is connected to the surface of the side wall portion. The rotating rod is inclined.

[0011] As a further optimization of this utility model, the outer sleeve is provided with an unlocking component to move the pressure bar block away from the surface of the horizontal bar. The unlocking component includes a trigger cylinder, a compression spring, and a push rod. A sliding groove is formed on the surface of the outer sleeve. The trigger cylinder is fitted onto the surface of the outer sleeve. One end of the push rod is connected to the inner surface of the trigger cylinder, and the other end of the push rod passes through the sliding groove and corresponds to the position of the rotating rod. The push rod slides along the inner wall of the sliding groove.

[0012] As a further optimization of this utility model, a pressing mechanism is provided on the clamping block through which the bolt is inserted. The pressing mechanism includes a pressing block and a triggering component. The triggering component is used to drive the pressing block so that the pressing block cooperates with the clamping block away from the bolt to press the horizontal bar.

[0013] As a further optimization of this utility model, the triggering component includes piston one, piston two, and a pushing block. The inner wall of the clamping block through which the bolt passes is provided with a groove, and the other end of the groove extends to the inner wall of the outer sleeve. The pushing block is slidably connected to the end of the groove located inside the outer sleeve and extends outside the groove. Piston two is fixedly connected to the end of the pushing block located inside the groove. The pressing block is slidably connected to the end of the groove away from the outer sleeve. Piston one is fixedly connected to the end of the pressing block located inside the groove. The space between piston one and piston two in the groove is filled with liquid. The end of the pushing block away from piston one is connected to a transmission mechanism.

[0014] As a further optimization of this utility model, the transmission mechanism includes a trigger bar, a first transmission rod, a second transmission rod, a crossbar, a limiting rod, and a return spring. One end of the trigger bar is fixedly connected to the surface of the rotating rod away from the horizontal rod. The crossbar is rotatably connected to the end of the pushing block away from the second piston. The second transmission rod is rotatably connected to the end of the crossbar away from the pressing block. The middle section of the first transmission rod is rotatably connected to the inner wall of the outer sleeve. The end of the first transmission rod away from the pressing member is rotatably connected to the end of the second transmission rod away from the crossbar. The two ends of the limiting rod are rotatably connected to the end of the crossbar near the pressing block and the inner wall of the outer sleeve, respectively. One end of the return spring is fixedly connected to the surface of the limiting rod, and the other end is fixedly connected to the inner wall of the outer sleeve. The end of the trigger bar away from the rotating rod is located below the end of the first transmission rod away from the second transmission rod.

[0015] The beneficial effects of this utility model are as follows: By cooperating with the positioning screw and the positioning nut, the positioning sleeve is pre-embedded in the beam. Combined with the detachable rod installation parts, the horizontal rod of the scaffolding is connected to the beam, avoiding the problems of conflict between the traditional method and the subsequent work surface of the masonry and concrete pouring of the parapet. At the same time, it also reduces the amount of finishing work, avoids the risk of leakage, and plays a role in shortening the construction period and reducing construction costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the positioning component structure according to Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of the rod mounting component structure according to Embodiment 1 of this utility model;

[0018] Figure 3 This is a schematic diagram of the clamping component structure according to Embodiment 1 of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection between a sleeve and a rod mounting component according to an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of the position of the locking component in Embodiment 2 of this utility model;

[0021] Figure 6 This is a schematic diagram of the locking component structure according to Embodiment 2 of this utility model;

[0022] Figure 7 This is a schematic diagram of the connection between the trigger cylinder and the push rod in Embodiment 2 of this utility model;

[0023] Figure 8 This is a schematic diagram of the outer sleeve structure of Embodiment 2 of this utility model;

[0024] Figure 9This is a schematic diagram of the pressing mechanism structure of Embodiment 3 of this utility model.

[0025] In the diagram: 1. Positioning sleeve; 2. Positioning screw; 3. Positioning nut; 4. Bolt; 5. Clamping component; 51. Clamping block; 52. Connecting component; 6. Locking assembly; 61. Outer sleeve; 611. Side wall portion; 612. Protrusion; 613. Rotating groove; 62. Pressure rod block; 63. Rotating rod; 64. Tension spring; 65. Rotating shaft; 7. Unlocking assembly; 71. Trigger cylinder; 72. Compression spring; 73. Push rod; 74. Slide groove; 8. Pressing mechanism; 81. Pressing block; 82. Piston one; 83. Piston two; 84. Push block; 85. Groove; 9. Transmission mechanism; 91. Trigger bar; 92. Transmission rod one; 93. Transmission rod two; 94. Crossbar; 95. Limiting rod; 96. Return spring. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] Example 1

[0028] refer to Figures 1 to 4 The structure shown is a reusable pre-embedded external scaffolding wall tie, including a positioning component and a rod installation component that cooperates with the positioning component;

[0029] The positioning component includes a positioning sleeve 1 and a fastener, with one end of the fastener inserted into one end of the positioning sleeve 1;

[0030] The pole installation component includes a bolt 4 and a clamp 5. The bolt 4 passes through the clamp 5, which is used to clamp the horizontal pole of the scaffold. After the fastener is pulled out, the bolt 4 is threaded into the positioning sleeve 1.

[0031] In this embodiment, the fastener includes a positioning screw 2 and a positioning nut 3. One end of the positioning screw 2 is inserted into one end of the positioning sleeve 1, and the surface of the end of the positioning screw 2 away from the positioning sleeve 1 is threadedly connected to the positioning nut 3. The positioning screw 2, the positioning nut 3, the bolt 4, and the clamping member 5 can all be disassembled and reused.

[0032] Specifically, the positioning sleeve 1 is installed inside the side formwork of the frame beam. Holes are made in the side formwork of the frame beam, and the positioning screw 2 passes through the holes to the outside of the formwork. The positioning sleeve is then secured to the side formwork of the beam using a positioning nut 3. After the concrete is poured and formed, the side formwork of the frame beam is removed, and the positioning screw 2 is pulled out. The bolt 4 on the clamping member 5 is then inserted into the positioning sleeve 1. This connects the clamping member 5 to the positioning sleeve 1. The clamping member 5 is used to clamp the horizontal bars of the scaffold, which connect the scaffolding installation members and the scaffolding uprights.

[0033] It should be noted that during the concrete pouring and hardening process, the positioning sleeve 1 protects the threaded part of the bolt 4 from concrete contamination or damage, ensuring the functional integrity of the bolt 4 and providing a reliable foundation for the subsequent installation of wall ties. The inner diameter of the positioning sleeve 1 is slightly larger than the outer diameter of the pre-embedded sleeve, usually by 1-2 mm, to facilitate installation and adjustment.

[0034] It should be further explained that the positioning sleeve 1 is pre-embedded on the side of the beam to avoid conflict with the working surface of subsequent slab masonry construction, parapet concrete pouring and other processes, and to reduce the risk of leakage.

[0035] Furthermore, the clamping member 5 includes a connector 52 and two sets of clamping blocks 51. The ends of the two sets of clamping blocks 51 that are close to each other are rotatably connected by a rotating shaft, and the ends of the two sets of clamping blocks 51 that are away from the rotating shaft are connected by the connector 52.

[0036] Specifically, the connector 52 includes a screw and a nut, and the ends of the two sets of clamps 51 away from the rotating shaft are connected by the screw and the nut.

[0037] In actual use, first remove the screw and nut, then insert the horizontal bar between the two sets of clamping blocks 51, and finally install the screw and nut so that the clamping parts 5 clamp the horizontal bar.

[0038] It should be noted that the clamping piece 5 with bolts 4 can be connected to the horizontal uprights of scaffolding of different lengths, which can meet the different distance requirements between the scaffolding and the building.

[0039] This utility model adopts a convenient disassembly design, facilitating on-site operation and relocation. After the external scaffolding is removed, only the positioning sleeve 1 remains. The surface layer construction can then proceed simply by sealing the positioning sleeve 1, reducing the amount of finishing work. This not only shortens the construction period but also reduces construction costs.

[0040] Example 2

[0041] This embodiment provides a reusable pre-embedded external scaffolding wall tie, which is a further improvement on Embodiment 1. In the wall tie provided in Embodiment 1, the two sets of clamping blocks 51 are connected by screws and nuts. However, scaffolding is often used for high-altitude operations, and the wind at high altitudes blows the scaffolding, causing it to sway and the nuts to loosen, resulting in the horizontal bar falling off the clamping block 5. Therefore, the wall tie in this embodiment adds a locking component 6 to prevent the horizontal bar from falling off the clamping block 5. For details, refer to... Figures 5 to 8 The structure shown includes a clamping component 6 connected to the surface of the clamping member 5. The clamping component 6 includes an outer sleeve 61, a pressing member, and a tension spring 64. The outer sleeve 61 is fixedly connected to a set of clamping blocks 51 with bolts 4. A horizontal bar passes through the inside of the outer sleeve 61. One end of the pressing member is rotatably connected to the inner wall of the outer sleeve 61, and the other end of the pressing member presses against the surface of the horizontal bar. One end of the tension spring 64 is connected to the surface of the pressing member away from the horizontal bar, and the other end is connected to the inner wall of the outer sleeve 61.

[0042] It should be noted that multiple sets of pressing components can be set, arranged in a circle inside the outer sleeve 61, and the number of tension springs 64 corresponds to the number of pressing components.

[0043] Furthermore, the pressing component includes a pressure bar block 62, a rotating rod 63, and a rotating shaft 65. One end of the rotating rod 63 is fixedly connected to the rotating shaft 65, the pressure bar block 62 is fixedly connected to the other end of the rotating rod 63, and the tension spring 64 is connected to the surface of the rotating rod 63.

[0044] Furthermore, the outer sleeve 61 includes a side wall portion 611 and a protrusion portion 612. The protrusion portion 612 is connected to the inner wall of the side wall portion 611. A rotating groove 613 is formed on the surface of the protrusion portion 612. A rotating shaft 65 is rotatably connected in the rotating groove 613. One end of the tension spring 64 away from the rotating rod 63 is connected to the surface of the side wall portion 611. The rotating rod 63 is inclined.

[0045] It should be noted that the surface of the pressure bar block 62 may be provided with a rubber layer, a resin layer, or its surface may be made uneven to increase the friction between the pressure bar block 62 and the horizontal bar. When the horizontal bar comes off the clamping member 5, the locking assembly 6 can prevent the horizontal bar from moving.

[0046] Furthermore, the outer sleeve 61 is provided with an unlocking component 7, which moves the pressure bar block 62 away from the surface of the horizontal bar. The unlocking component 7 includes a trigger cylinder 71, a compression spring 72, and a push rod 73. A groove 74 is opened on the surface of the outer sleeve 61. The trigger cylinder 71 is sleeved on the surface of the outer sleeve 61. One end of the push rod 73 is connected to the inner surface of the trigger cylinder 71, and the other end of the push rod 73 passes through the groove 74 and corresponds to the position of the rotating rod 63. The push rod 73 slides along the inner wall of the groove 74.

[0047] It should be noted that the end of the push rod 73 near the rotating rod 63 can be inclined or curved.

[0048] In actual use, pulling the trigger cylinder 71 can drive the push rod 73 to slide along the inner wall of the slide groove 74. The push rod 73 presses against the surface of the rotating rod 63, causing the rotating rod 63 to rotate, thereby causing the pressure rod block 62 to move away from the horizontal rod. At this time, the horizontal rod can be pulled out. Through the setting of the unlocking component 7, the horizontal rod can be easily disengaged from the locking component 6, which facilitates the reuse of the locking component 6.

[0049] It should be noted that the number of push rods 73 is the same as the number of pressing parts.

[0050] Example 3

[0051] This embodiment provides a reusable pre-embedded wall tie for external scaffolding. It is a further improvement on Embodiment 2 by adding a pressing mechanism 8. The pressing mechanism 8 further strengthens the overall clamping force of the wall tie on the horizontal bar. For details, please refer to... Figure 6 , Figure 7 and Figure 9 The structure shown includes a pressing mechanism 8 on the clamping block 51 through which the bolt 4 passes. The pressing mechanism 8 includes a pressing block 81 and a triggering component. The triggering component is used to drive the pressing block 81 so that the pressing block 81 cooperates with the clamping block 51 away from the bolt 4 to press the horizontal bar.

[0052] Furthermore, the triggering assembly includes piston 1 82, piston 2 83, and push block 84. The inner wall of the clamping block 51, through which bolt 4 passes, has a groove 85. The other end of the groove 85 extends to the inner wall of the outer sleeve 61. The push block 84 is slidably connected to the end of the groove 85 located inside the outer sleeve 61 and extends outside the groove 85. Piston 2 83 is fixedly connected to the end of the push block 84 located inside the groove 85. The clamping block 81 is slidably connected to the end of the groove 85 away from the outer sleeve 61. Piston 1 82 is fixedly connected to the end of the clamping block 81 located inside the groove 85. The space between piston 1 82 and piston 2 83 in the groove 85 is filled with liquid. The end of the push block 84 away from piston 1 82 is connected to a transmission mechanism 9.

[0053] It should be noted that the liquid can be water or hydraulic oil, but hydraulic oil would be better.

[0054] In actual use, pressing the push block 84 can cause the clamping block 81 to exert pressure on the horizontal bar.

[0055] In this embodiment, the surface of the pressure bar block 62 must be provided with a material with a certain degree of elasticity, such as a rubber layer or a resin layer.

[0056] Furthermore, the transmission mechanism 9 includes a trigger bar 91, a first transmission rod 92, a second transmission rod 93, a crossbar 94, a limiting rod 95, and a return spring 96. One end of the trigger bar 91 is fixedly connected to the surface of the rotating rod 63 away from the horizontal rod. The crossbar 94 is rotatably connected to the end of the push block 84 away from the second piston 83. The second transmission rod 93 is rotatably connected to the end of the crossbar 94 away from the pressing block 81. The middle section of the first transmission rod 92 is rotatably connected to the inner wall of the outer sleeve 61. The end of the first transmission rod 92 away from the pressing member is rotatably connected to the end of the second transmission rod 93 away from the crossbar 94. The two ends of the limiting rod 95 are rotatably connected to the end of the crossbar 94 near the pressing block 81 and the inner wall of the outer sleeve 61, respectively. One end of the return spring 96 is fixedly connected to the surface of the limiting rod 95, and the other end is fixedly connected to the inner wall of the outer sleeve 61. The end of the trigger bar 91 away from the rotating rod 63 is located below the end of the first transmission rod away from the second transmission rod.

[0057] In actual use, when the horizontal bar slips out of the clamping piece 5, the pressure block 62 will press the horizontal bar tightly, and at the same time, the rotating rod 63 will rotate slightly along the rotating shaft 65. The rotation of the rotating rod 63 will cause the trigger bar 91 to squeeze the end of the transmission rod 1 92 away from the transmission rod 2 93. Due to the cooperation between the rotating rod 1 92, the rotating rod 2 93, the horizontal bar 94 and the limiting rod 95, the pushing block 84 can be pressed, so that the pressing block 81 will exert pressure on the horizontal bar, and cooperate with the clamping block 51 away from the bolt 4 to clamp the horizontal bar and prevent the horizontal bar from slipping out of the clamping piece 5.

[0058] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A recyclable pre-buried outside scaffold wall connecting piece, characterized in that, The utility model provides a kind of positioning piece and the rod piece mounting piece matched with positioning piece, the positioning piece includes positioning sleeve (1) and fastener, one end of the fastener is inserted in one end of positioning sleeve (1), the rod piece mounting piece includes bolt (4) and clamping piece (5), the bolt (4) is threaded on clamping piece (5), the clamping piece (5) is used to clamp horizontal pole of scaffold, after pulling out fastener, the bolt (4) is connected to inside positioning sleeve (1) by screw thread; The surface of the clamping piece (5) is connected with a locking assembly (6), the locking assembly (6) includes an outer sleeve (61), a pressing piece and a tension spring (64), the outer sleeve (61) is fixedly connected to a group of clamping blocks (51) provided with the bolt (4), the horizontal pole passes through the inside of the outer sleeve (61), one end of the pressing piece is rotatably connected to the inner wall of the outer sleeve (61), the other end of the pressing piece abuts against the surface of the horizontal pole, one end of the tension spring (64) is connected to the surface of the pressing piece away from the horizontal pole, and the other end is connected to the inner wall of the outer sleeve (61).

2. A wall tie for a recyclable pre-buried external scaffold according to claim 1, wherein: The clamping piece (5) includes a connecting piece (52) and two groups of clamping blocks (51), the two groups of clamping blocks (51) are rotatably connected by a rotating shaft at one end close to each other, and the two groups of clamping blocks (51) are connected by the connecting piece (52) at one end away from the rotating shaft.

3. A transferable pre-buried outside scaffold wall connecting piece according to claim 2, characterized in that: The pressing piece includes a pressing rod block (62), a rotating rod (63) and a rotating shaft (65), one end of the rotating rod (63) is fixedly connected to the rotating shaft (65), the pressing rod block (62) is fixedly connected to the other end of the rotating rod (63), and the tension spring (64) is connected to the surface of the rotating rod (63).

4. A transferable pre-buried outside scaffold wall connecting piece according to claim 3, characterized in that: The outer sleeve (61) includes a side wall part (611) and a protruding part (612), the protruding part (612) is connected to the inner wall of the side wall part (611), the surface of the protruding part (612) is provided with a rotating groove (613), the rotating shaft (65) is rotatably connected in the rotating groove (613), one end of the tension spring (64) away from the rotating rod (63) is connected to the surface of the side wall part (611), and the rotating rod (63) is arranged obliquely.

5. A transferable pre-buried outside scaffold wall connecting piece according to claim 4, characterized in that: The outer sleeve (61) is provided with an unlocking assembly (7) to make the surface of the pressing rod block (62) away from the horizontal pole, the unlocking assembly (7) includes a trigger cylinder (71), a compression spring (72) and a push rod (73), the surface of the outer sleeve (61) is provided with a sliding groove (74), the trigger cylinder (71) is sleeved on the surface of the outer sleeve (61), one end of the push rod (73) is connected to the inner side surface of the trigger cylinder (71), the other end of the push rod (73) penetrates through the sliding groove (74) and corresponds to the position of the rotating rod (63), and the push rod (73) slides along the inner wall of the sliding groove (74).

6. The recyclable pre-embedded outside-scaffolding wall connecting piece according to claim 3, characterized in that: The clamping block (51) provided with the bolt (4) is provided with a pressing mechanism (8), the pressing mechanism (8) includes a pressing block (81) and a trigger assembly, the trigger assembly is used to drive the pressing block (81) to press the horizontal pole away from the clamping block (51) of the bolt (4).

7. A transferable pre-buried outside scaffold wall connecting piece according to claim 6, characterized in that: The trigger assembly includes a piston one (82), a piston two (83) and a push block (84), the inner wall of the clamping block (51) provided with the bolt (4) is provided with a groove (85), the other end of the groove (85) extends to the inner wall of the outer sleeve (61), the push block (84) is slidably connected to one end of the groove (85) in the outer sleeve (61), and extends out of the groove (85), the piston two (83) is fixedly connected to one end of the push block (84) in the groove (85), the compression block (81) is slidably connected to one end of the groove (85) away from the outer sleeve (61), the piston one (82) is fixedly connected to one end of the compression block (81) in the groove (85), the space in the groove (85) between the piston one (82) and the piston two (83) is filled with a liquid, and one end of the push block (84) away from the piston one (82) is connected with a transmission mechanism (9).

8. A transferable pre-buried outside scaffold wall connecting piece according to claim 7, characterized in that: The transmission mechanism (9) includes a trigger bar (91), a transmission rod one (92), a transmission rod two (93), a cross rod (94), a limiting rod (95) and a return spring (96), one end of the trigger bar (91) is fixedly connected to the surface of the rotating rod (63) away from the horizontal rod one side, the cross rod (94) is rotatably connected to one end of the push block (84) away from the piston two (83), the transmission rod two (93) is rotatably connected to one end of the cross rod (94) away from the compression block (81), the middle section of the transmission rod one (92) is rotatably connected to the inner wall of the outer sleeve (61), one end of the transmission rod one (92) away from the pressing piece is rotatably connected to one end of the transmission rod two (93) away from the cross rod (94), the limiting rod (95) is rotatably connected to the cross rod (94) near one end of the compression block (81) and the inner wall of the outer sleeve (61), one end of the return spring (96) is fixedly connected to the surface of the limiting rod (95), and the other end is fixedly connected to the inner wall of the outer sleeve (61), and one end of the trigger bar (91) away from the rotating rod (63) is located below one end of the transmission rod one away from the transmission rod two.

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