A pile foundation positioning device

Abstract

The present application is suitable for pile foundation positioning technical field, provide a kind of pile foundation positioning device, including base, the mounting bracket is fixed on the base, the base is provided with avoiding hole, further include: guide sliding block, main shaft, helical blade, mounting plate, guide shaft, mounting block, drive assembly, reciprocating mechanism, second transmission assembly and disengaging mechanism.Reciprocating mechanism is driven mounting block to reciprocate up and down on guide shaft by the way of guide sliding block moves in guide chute, further make main shaft and helical blade reciprocate up and down while moving down, it is convenient to discharge the soil drilled by helical blade, improve the efficiency of pit positioning, when main shaft is contacted with rock, disengaging mechanism removes the transmission connection of main shaft and first motor and stops mounting block to reciprocate up and down on guide shaft, make mounting block move upwards along guide shaft, main shaft has no downward thrust at this time, to avoid the instant collision of helical blade and rock when main shaft is contacted with rock.

Description

Technical Field

[0001] This invention belongs to the field of pile foundation positioning technology, and particularly relates to a pile foundation positioning device. Background Technology

[0002] A pile foundation is a deep foundation in which the tops of several piles are connected into a whole by a pile cap to jointly bear dynamic and static loads. A pile is a vertical or inclined foundation component set in the soil. Its function is to penetrate soft, highly compressible soil layers or water and transfer the load borne by the pile to a harder, denser or less compressible bearing layer. We usually refer to the piles in a pile foundation as foundation piles.

[0003] Pile foundations are divided into two types during construction: precast and cast-in-place. Precast pile foundations are formed by casting the pile foundation in a factory in advance. During construction, holes need to be drilled at the location where the pile foundation will be installed, and then a crane is used to move the pile foundation into the positioning hole.

[0004] The existing CN 217536945U discloses an electronic piling positioning device for construction. When in use, the center position of the positioning hole is first aligned with the ground where piling is required. Then, the base is fixed by fixed support feet to improve the stability of the base. Subsequently, the first motor drives the drill rod to rotate rapidly, and the telescopic hydraulic cylinder drives the slider to descend in the slide groove, thereby lowering the mounting box and allowing the high-speed rotating drill rod to pass through the positioning hole to drill a hole in the ground.

[0005] The above-mentioned device still has the following shortcomings when in use: when the drill rod is continuously drilling downwards, the soil on the drill rod is easy to get stuck on the spiral blades, resulting in poor soil discharge. In addition, when the drill rod comes into contact with the rock, the rock will collide with the drill rod, which can easily damage the drill rod. Summary of the Invention

[0006] The purpose of this invention is to provide a pile foundation positioning device, which aims to solve the problem that when the drill rod comes into contact with the rock in the existing positioning device, the rock will collide with the drill rod and easily damage it.

[0007] This invention is implemented as follows: a pile foundation positioning device includes a base, on which a mounting frame is fixed, and the base is provided with clearance holes. It also includes: a guide slider, a main shaft, helical blades, mounting plates, a guide shaft, a mounting block, a drive assembly, a reciprocating movement mechanism, a second transmission assembly, and a disengagement mechanism. The mounting frame is provided with a guide groove, the guide slider is slidably connected to the guide groove, two mounting plates are fixed to the guide slider, a guide shaft is fixed to the mounting plates, and the mounting block is slidably connected to the guide shaft. A first motor is mounted on the mounting block, and the second transmission assembly is... The first motor is mounted on a mounting block. The rotating end of the first motor is connected to the main shaft via a second transmission assembly, and the spiral blades are fixed on the main shaft. The drive assembly is mounted on a mounting frame and is used to drive the guide slider to move on the guide groove. The reciprocating movement mechanism is mounted on the guide slider and drives the mounting block to reciprocate up and down on the guide shaft by the guide slider moving within the guide groove. The disengagement mechanism is mounted on the mounting block and, when the main shaft contacts the rock, disengages the transmission connection between the main shaft and the first motor and stops the mounting block from reciprocating up and down on the guide shaft.

[0008] In a further technical solution, the drive assembly includes a lead screw and a second motor. The lead screw is rotatably connected in a guide groove and threadedly connected to the guide slider. The second motor is fixed on a mounting bracket, and the rotating end of the second motor is connected to the lead screw.

[0009] In a further technical solution, the reciprocating moving mechanism includes a first transmission component, a rotating column, and a push shaft. The rotating column is movably connected to the guide slider, and the push shaft is fixed on the rotating column. A long groove is provided on the side wall of the mounting block, and the push shaft is slidably connected to the long groove. The first transmission component is disposed on the guide slider, and the first transmission component drives the rotating column to rotate by the guide slider moving in the guide groove.

[0010] In a further technical solution, the first transmission component includes a gear, a rack, and a transmission shaft. The guide groove is provided with a mounting groove, the rack is mounted on the side wall of the mounting groove, the transmission shaft is rotatably connected to the guide slider, the gear is fixed to one end of the transmission shaft and meshes with the rack, and the other end of the transmission shaft is slidably connected to a rotating column.

[0011] In a further technical solution, the second transmission component includes a rotating disk and a first slider. The rotating disk is rotatably connected to the mounting block. The rotating disk is provided with a first sliding groove. The first slider is slidably connected to the first sliding groove. A first spring is provided in the first sliding groove. The main shaft is provided with a second sliding groove that cooperates with the first slider. Both the mounting block and the rotating disk are provided with insertion holes. The rotating end of the first motor is connected to the rotating disk.

[0012] A further technical solution includes a disengagement mechanism comprising a first push rod, a sliding ring, a second push rod, and a trigger assembly. A third groove is provided on the mounting block, and the sliding ring is slidably connected to the third groove. The sliding ring is sleeved on the rotating disk. A first annular push groove and a second annular push groove are respectively provided on the inner and outer walls of the sliding ring. The first push rod is fixed to a first slider, and its end penetrates the rotating disk and extends into the first annular push groove. A second push rod is slidably connected to the mounting block, with one end extending out of the mounting block and the other end extending into the third groove and the second annular push groove. A fourth groove is provided on the guide slider. A shoulder ring is provided on the side wall of the rotating column, and the shoulder ring is movably disposed within the fourth groove. A second spring is provided within the fourth groove. The trigger assembly is mounted on the main shaft, and upon contact with the rock, the trigger assembly pushes the first slider out of the second groove.

[0013] In a further technical solution, the triggering component includes a trigger block, a powerful spring, a connecting shaft, and a push slider. A fourth slide groove is provided at the end of the main shaft. The trigger block is slidably connected to the fourth slide groove. A powerful spring is provided in the fourth slide groove. One end of the connecting shaft is fixed to the trigger block, and the other end of the connecting shaft is provided with a push surface. A push slider is slidably connected to the first slide groove.

[0014] This invention provides a pile foundation positioning device. The device is moved to the location where a drilling pit needs to be positioned. A first motor drives the main shaft to rotate via a second transmission assembly. The main shaft drives the helical blades to rotate. A drive assembly drives a guide slider to move downwards on a guide groove. The guide slider drives the main shaft and helical blades downwards for drilling pit positioning. A reciprocating mechanism drives an installation block to move up and down on a guide shaft by the guide slider moving within the guide groove. This allows the main shaft and helical blades to move up and down simultaneously while moving downwards, facilitating the removal of soil drilled by the helical blades and improving drilling pit positioning efficiency. When the main shaft contacts the rock, a disengagement mechanism releases the transmission connection between the main shaft and the first motor and stops the installation block from reciprocating up and down on the guide shaft. The installation block then moves upwards along the guide shaft. At this point, the main shaft has no downward thrust, thus avoiding collision between the helical blades and the rock at the moment of contact. The drive assembly can then be shut off promptly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a pile foundation positioning device provided in an embodiment of the present invention;

[0016] Figure 2 This is a front view of a pile foundation positioning device provided in an embodiment of the present invention;

[0017] Figure 3This is a schematic diagram of the internal structure of a pile foundation positioning device provided in an embodiment of the present invention;

[0018] Figure 4 Provided for embodiments of the present invention Figure 3 A magnified structural diagram of A in the middle;

[0019] Figure 5 Provided for embodiments of the present invention Figure 3 A magnified structural diagram of B in the diagram;

[0020] Figure 6 Provided for embodiments of the present invention Figure 4 A magnified structural diagram of C.

[0021] In the attached diagram: base 101, clearance hole 102, mounting bracket 103, guide groove 104, guide slider 105, main shaft 106, spiral blade 107, mounting plate 108, guide shaft 109, mounting block 110, first motor 111, drive assembly 2, lead screw 201, second motor 202, reciprocating movement mechanism 4, first transmission assembly 3, mounting groove 301, gear 302, rack 303, transmission shaft 304, rotating column 401, long groove 402, push shaft 403, second transmission assembly 5, rotation. Disc 501, first slide groove 502, first slider 503, first spring 504, second slide groove 505, insertion hole 506, disengagement mechanism 6, first push rod 601, third slide groove 602, sliding ring 603, first annular push groove 604, second annular push groove 605, second push rod 606, fourth slide groove 607, shoulder ring 608, second spring 609, trigger assembly 7, fourth slide groove 701, trigger block 702, strong spring 703, connecting shaft 704, pushing surface 705, pushing slider 706. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0023] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0024] like Figures 1-4As shown, a pile foundation positioning device according to an embodiment of the present invention includes a base 101, a mounting frame 103 fixed on the base 101, and an avoidance hole 102 provided on the base 101. It also includes: a guide slider 105, a main shaft 106, a helical blade 107, a mounting plate 108, a guide shaft 109, a mounting block 110, a drive assembly 2, a reciprocating movement mechanism 4, a second transmission assembly 5, and a disengagement mechanism 6. The mounting frame 103 is provided with a guide groove 104, and the guide slider 105 is slidably connected to the guide groove 104. Two mounting plates 108 are fixed on the guide slider 105, and a guide shaft 109 is fixed on the mounting plate 108. The mounting block 110 is slidably connected to the guide shaft 109. A first motor 111 is mounted on the mounting block 110. The second transmission assembly 5 is mounted on the mounting block 110. The rotating end of the first motor 111 is connected to the main shaft 106 through the second transmission assembly 5. The spiral blade 107 is fixed on the main shaft 106. The drive assembly 2 is mounted on the mounting frame 103. The drive assembly 2 is used to drive the guide slider 105 to move on the guide groove 104. The reciprocating movement mechanism 4 is mounted on the guide slider 105. The reciprocating movement mechanism 4 drives the mounting block 110 to reciprocate up and down on the guide shaft 109 by the guide slider 105 moving in the guide groove 104. The disengagement mechanism 6 is mounted on the mounting block 110. When the main shaft 106 contacts the rock, the disengagement mechanism 6 releases the transmission connection between the main shaft 106 and the first motor 111 and stops the mounting block 110 from reciprocating up and down on the guide shaft 109.

[0025] In this embodiment of the invention, during use, the device is moved to the location where the drilling pit needs to be positioned. The first motor 111 drives the main shaft 106 to rotate via the second transmission assembly 5. The main shaft 106 drives the spiral blade 107 to rotate. The drive assembly 2 drives the guide slider 105 to move downward on the guide groove 104. The guide slider 105 drives the main shaft 106 and the spiral blade 107 to move downward for drilling pit positioning. The reciprocating movement mechanism 4 drives the mounting block 110 to move up and down on the guide shaft 109 by the movement of the guide slider 105 within the guide groove 104, thereby causing the main shaft 106 to move back and forth. While moving downwards, the spiral blade 107 reciprocates up and down, facilitating the removal of the soil drilled out by the spiral blade 107 and improving the efficiency of pit positioning. When the main shaft 106 contacts the rock, the disengagement mechanism 6 disconnects the transmission connection between the main shaft 106 and the first motor 111 and stops the mounting block 110 from reciprocating up and down on the guide shaft 109, causing the mounting block 110 to move upwards along the guide shaft 109. At this time, the main shaft 106 has no downward thrust, thus avoiding the spiral blade 107 from colliding with the rock at the moment the main shaft 106 contacts the rock. At this time, the drive assembly 2 can be shut down in time.

[0026] like Figure 1As shown, in a preferred embodiment of the present invention, the drive assembly 2 includes a lead screw 201 and a second motor 202. The lead screw 201 is rotatably connected in the guide groove 104 and threadedly connected to the guide slider 105. The second motor 202 is fixed on the mounting bracket 103 and the rotating end of the second motor 202 is connected to the lead screw 201.

[0027] In this embodiment of the invention, the second motor 202 drives the lead screw 201 to rotate, and the lead screw 201 drives the guide slider 105 to move on the guide groove 104 through thread transmission.

[0028] like Figure 4 As shown, in a preferred embodiment of the present invention, the reciprocating moving mechanism 4 includes a first transmission component 3, a rotating column 401, and a push shaft 403. The rotating column 401 is movably connected to the guide slider 105, and the push shaft 403 is fixed on the rotating column 401. A long groove 402 is provided on the side wall of the mounting block 110, and the push shaft 403 is slidably connected to the long groove 402. The first transmission component 3 is disposed on the guide slider 105, and the first transmission component 3 drives the rotating column 401 to rotate by the guide slider 105 moving within the guide groove 104.

[0029] In this embodiment of the invention, the first transmission component 3 drives the rotating column 401 to rotate by the guide slider 105 moving in the guide groove 104. The rotating column 401 drives the push shaft 403 to rotate, and the push shaft 403 pushes the mounting block 110 to move up and down reciprocally through the long groove 402.

[0030] like Figure 4 As shown, in a preferred embodiment of the present invention, the first transmission component 3 includes a gear 302, a rack 303, and a transmission shaft 304. The guide groove 104 is provided with a mounting groove 301. The rack 303 is mounted on the side wall of the mounting groove 301. The transmission shaft 304 is rotatably connected to the guide slider 105. The gear 302 is fixed to one end of the transmission shaft 304 and meshes with the rack 303. The other end of the transmission shaft 304 is slidably connected to the rotating column 401.

[0031] In this embodiment of the invention, when the guide slider 105 moves up and down, the guide slider 105 drives the gear 302 to move relative to the rack 303, the rack 303 pushes the gear 302 to rotate, the gear 302 drives the transmission shaft 304 to rotate, and the transmission shaft 304 drives the rotating column 401 to rotate.

[0032] like Figure 6As shown, in a preferred embodiment of the present invention, the second transmission component 5 includes a rotating disk 501 and a first slider 503. The rotating disk 501 is rotatably connected to the mounting block 110. The rotating disk 501 is provided with a first sliding groove 502. The first slider 503 is slidably connected to the first sliding groove 502. A first spring 504 is provided in the first sliding groove 502. The main shaft 106 is provided with a second sliding groove 505 that cooperates with the first slider 503. Both the mounting block 110 and the rotating disk 501 are provided with insertion holes 506. The rotating end of the first motor 111 is connected to the rotating disk 501.

[0033] In this embodiment of the invention, the first spring 504 pushes the first slider 503, and the end of the first slider 503 is inserted into the second groove 505. At this time, the rotating disk 501 can drive the main shaft 106 to rotate.

[0034] like Figures 4-6 As shown, in a preferred embodiment of the present invention, the disengagement mechanism 6 includes a first push rod 601, a sliding ring 603, a second push rod 606, and a trigger assembly 7. A third sliding groove 602 is provided on the mounting block 110. The sliding ring 603 is slidably connected to the third sliding groove 602 and is sleeved on the rotating disk 501. A first annular push groove 604 and a second annular push groove 605 are respectively provided on the inner and outer walls of the sliding ring 603. The first push rod 601 is fixed to the first slider 503, and the end of the first push rod 601 penetrates the rotating disk 501 and extends into the first annular push groove 604. A second push rod 606 is slidably connected to the mounting block 110. One end of the second push rod 606 extends out of the mounting block 110, and the other end of the second push rod 606 extends into the third slide groove 602 and the second annular push groove 605. A fourth slide groove 607 is provided on the guide slider 105. A shoulder ring 608 is provided on the side wall of the rotating column 401. The shoulder ring 608 is movably disposed in the fourth slide groove 607. A second spring 609 is provided in the fourth slide groove 607. The trigger component 7 is disposed on the main shaft 106. After the trigger component 7 contacts the rock, it pushes the first slider 503 out of the second slide groove 505.

[0035] In this embodiment of the invention, after the trigger component 7 contacts the rock, it pushes the first slider 503 out of the second slide groove 505. The first slider 503 drives the first push rod 601 to move towards the first annular push groove 604, thereby causing the first push rod 601 to push the sliding ring 603 upward by pushing the first annular push groove 604. When the sliding ring 603 moves upward, it pushes the second push rod 606 to move through the second annular push groove 605. The second push rod 606 overcomes the elastic force of the second spring 609 and pushes the rotating column 401 to move. The rotating column 401 drives the push shaft 403 to disengage from the long groove 402, causing the mounting block 110 to move upward along the guide shaft 109. At this time, the main shaft 106 has no downward thrust, thereby avoiding the collision between the spiral blade 107 and the rock at the moment the main shaft 106 contacts the rock. At this time, the second motor 202 can be turned off in time.

[0036] like Figure 5 and Figure 6 As shown, in a preferred embodiment of the present invention, the triggering component 7 includes a trigger block 702, a powerful spring 703, a connecting shaft 704, and a push slider 706. The end of the main shaft 106 is provided with a fourth slide groove 701. The trigger block 702 is slidably connected to the fourth slide groove 701. The powerful spring 703 is provided in the fourth slide groove 701. One end of the connecting shaft 704 is fixed to the trigger block 702, and the other end of the connecting shaft 704 is provided with a push surface 705. The push slider 706 is slidably connected to the first slide groove 502.

[0037] In this embodiment of the invention, when the trigger block 702 contacts the rock, as the main shaft 106 continues to move downward, the trigger block 702 overcomes the elastic force of the strong spring 703 and moves upward relative to the main shaft 106. The trigger block 702 drives the connecting shaft 704 to move upward, and the pushing surface 705 at the end of the connecting shaft 704 pushes the pushing slider 706. The pushing slider 706 pushes the first slider 503 out of the second groove 505. At this time, the rotating disk 501 cannot drive the main shaft 106 to rotate when it rotates, thereby avoiding the collision between the spiral blade 107 and the rock.

[0038] The above embodiments of the present invention provide a pile foundation positioning device. In use, the device is moved to the location where drilling is required. A first spring 504 pushes a first slider 503, the end of which inserts into a second groove 505. At this time, a rotating disk 501 drives a main shaft 106 to rotate. A first motor 111 drives the main shaft 106 to rotate, which in turn drives a spiral blade 107 to rotate. A second motor 202 drives a lead screw 201 to rotate. The lead screw 201 drives a guide slider 105 to move downwards on a guide groove 104 via a threaded transmission. The guide slider 105 drives the main shaft 106 and the spiral blade 107 to rotate. The spiral blade 107 moves downwards to position the drill pit. As the guide slider 105 moves downwards, it drives the gear 302 to move relative to the rack 303. The rack 303 pushes the gear 302 to rotate, which in turn drives the drive shaft 304 to rotate. The drive shaft 304 then drives the rotating column 401 to rotate, which in turn drives the push shaft 403 to rotate. The push shaft 403 pushes the mounting block 110 to move up and down reciprocally through the long slot 402. This causes the main shaft 106 and the spiral blade 107 to move up and down simultaneously while moving downwards, facilitating the removal of the soil drilled out by the spiral blade 107 and improving the drill pit positioning. Efficiency: When the trigger block 702 contacts the rock, as the main shaft 106 continues to move downwards, the trigger block 702 overcomes the elastic force of the strong spring 703 and moves upwards relative to the main shaft 106. The trigger block 702 drives the connecting shaft 704 to move upwards. The pushing surface 705 at the end of the connecting shaft 704 pushes the pushing slider 706, which pushes the first slider 503 out of the second groove 505. At this time, the rotating disk 501 cannot drive the main shaft 106 to rotate, thus avoiding the collision between the spiral blade 107 and the rock. The first slider 503 drives the first push rod 601 to move towards the first annular push groove 604, thereby making... The first push rod 601 pushes the sliding ring 603 upward by pushing the first annular push groove 604. When the sliding ring 603 moves upward, it pushes the second push rod 606 to move through the second annular push groove 605. The second push rod 606 overcomes the elastic force of the second spring 609 and pushes the rotating column 401 to move. The rotating column 401 drives the push shaft 403 to disengage from the long groove 402, so that the mounting block 110 moves upward along the guide shaft 109. At this time, the main shaft 106 has no downward thrust, thereby avoiding the collision between the spiral blade 107 and the rock at the moment the main shaft 106 contacts the rock. At this time, the second motor 202 can be turned off in time.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pile foundation positioning device, comprising a base, a mounting bracket fixed on the base, and clearance holes provided on the base, characterized in that, Also includes: The system comprises a guide slider, a main shaft, helical blades, a mounting plate, a guide shaft, a mounting block, a drive assembly, a reciprocating movement mechanism, a second transmission assembly, and a disengagement mechanism. The mounting frame has a guide groove, the guide slider is slidably connected to the guide groove, two mounting plates are fixed to the guide slider, a guide shaft is fixed to the mounting plate, and the mounting block is slidably connected to the guide shaft. A first motor is mounted on the mounting block, and the second transmission assembly is mounted on the mounting block. The rotating end of the first motor is connected to the main shaft through the second transmission assembly, and the helical blades are fixed to the main shaft. The drive assembly is mounted on the mounting frame and is used to drive the guide slider to move on the guide groove. The reciprocating movement mechanism is mounted on the guide slider and drives the mounting block to reciprocate up and down on the guide shaft by the movement of the guide slider within the guide groove. The mechanism includes a first transmission component, a rotating column, and a push shaft. The rotating column is movably connected to a guide slider, and the push shaft is fixed on the rotating column. A long groove is provided on the side wall of the mounting block, and the push shaft is slidably connected to the long groove. The first transmission component is mounted on the guide slider, and drives the rotating column to rotate by the guide slider moving within the guide groove. The first transmission component includes a gear, a rack, and a transmission shaft. A mounting groove is provided on the guide groove, and the rack is mounted on the side wall of the mounting groove. The transmission shaft is rotatably connected to the guide slider, and the gear is fixed to one end of the transmission shaft, meshing with the rack. The other end of the transmission shaft is slidably connected to the rotating column. A disengagement mechanism is provided on the mounting block. When the main shaft contacts the rock, the disengagement mechanism releases the transmission connection between the main shaft and the first motor and stops the mounting block from reciprocating up and down on the guide shaft.

2. The pile foundation positioning device according to claim 1, characterized in that, The drive assembly includes a lead screw and a second motor. The lead screw is rotatably connected in a guide groove and threadedly connected to a guide slider. The second motor is fixed on a mounting bracket, and the rotating end of the second motor is connected to the lead screw.

3. The pile foundation positioning device according to claim 1, characterized in that, The second transmission assembly includes a rotating disk and a first slider. The rotating disk is rotatably connected to the mounting block. The rotating disk is provided with a first sliding groove. The first slider is slidably connected to the first sliding groove. A first spring is provided in the first sliding groove. The main shaft is provided with a second sliding groove that cooperates with the first slider. Both the mounting block and the rotating disk are provided with insertion holes. The rotating end of the first motor is connected to the rotating disk.

4. The pile foundation positioning device according to claim 3, characterized in that, The disengagement mechanism includes a first push rod, a sliding ring, a second push rod, and a trigger assembly. A third groove is provided on the mounting block, and the sliding ring is slidably connected to the third groove. The sliding ring is sleeved on the rotating disk. A first annular push groove and a second annular push groove are respectively provided on the inner and outer walls of the sliding ring. The first push rod is fixed to the first slider, and its end passes through the rotating disk and extends into the first annular push groove. A second push rod is slidably connected to the mounting block, with one end extending out of the mounting block and the other end extending into the third groove and the second annular push groove. A fourth groove is provided on the guide slider. A shoulder ring is provided on the side wall of the rotating column, and the shoulder ring is movably disposed within the fourth groove. A second spring is provided within the fourth groove. The trigger assembly is mounted on the main shaft. After contacting the rock, the trigger assembly pushes the first slider out of the second groove.

5. The pile foundation positioning device according to claim 4, characterized in that, The triggering assembly includes a trigger block, a powerful spring, a connecting shaft, and a push slider. The end of the main shaft is provided with a fourth slide groove. The trigger block is slidably connected to the fourth slide groove. A powerful spring is provided in the fourth slide groove. One end of the connecting shaft is fixed to the trigger block, and the other end of the connecting shaft is provided with a push surface. A push slider is slidably connected to the first slide groove.

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