A self-adaptive deformation-adjustable, support-free, shock-absorbing, and sound-insulating prefabricated floor slab and its installation method

Abstract

The present invention relates to the field of floor slab technology, and specifically to a prefabricated floor slab with self-adaptive deformation adjustment and support-free, shock-absorbing and sound-insulating properties, and an installation method thereof, comprising a first floor slab, wherein reinforcing steel bars are arranged in the first floor slab, and angle steel supports are arranged on the side walls of the first floor slab, and further comprising elastic members arranged at both ends of the reinforcing steel bars; and a foam pad arranged between the first floor slab and the elastic members; the present invention changes the status quo of traditional prefabricated floor slabs having no shock-absorbing capability by providing prefabricated floor slabs, and can increase the ability of prefabricated floor slabs to automatically adjust deformation, improve seismic performance, and reduce damage to buildings caused by earthquakes; and can eliminate the need for support of the prefabricated floor slabs, thereby improving construction efficiency; at the same time, the middle layer of the floor slab adopts an insulation board and a honeycomb structure, which not only ensures the structural strength of the middle layer, but also improves the sound insulation and heat preservation performance of the floor slab.

Description

Technical Field

[0001] The present invention relates to the technical field of floor slabs, and in particular to a self-adaptive deformation-adjustable, support-free, shock-absorbing, and sound-insulating prefabricated floor slab and an installation method thereof. Background Art

[0002] Currently, prefabricated buildings are too rigid. For example, masonry infill walls are replaced with precast concrete panels, which increases stiffness and intensifies seismic forces. However, during an earthquake, floor slabs, as non-seismic components, cannot deform within their planes and are often unable to absorb seismic energy, failing to contribute to shock absorption. The collapse of numerous buildings in earthquakes shows that after beams and columns are damaged, floor slabs often remain relatively intact.

[0003] Continuous advancements in construction technology, particularly in high-rise buildings and large industrial plants, have placed higher demands on the seismic resistance, load-bearing capacity, and construction efficiency of floor slabs. Traditional composite floor slabs are non-seismic, fully rigid components within the plane. They have poor seismic energy absorption and lack effective deformation accommodation. Furthermore, they still require a support system during construction, increasing both construction difficulty and cost. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned deficiencies and provide a support-free, shock-absorbing and sound-insulating prefabricated floor slab with adaptive deformation adjustment and an installation method.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A self-adaptive deformation-adjustable, support-free, shock-absorbing, and sound-insulating prefabricated floor slab comprises a first floor slab, wherein reinforcing steel bars are provided in the first floor slab, and angle steel supports are provided on the side walls of the first floor slab, and further comprises:

[0007] Elastic members, provided at both ends of the reinforcing steel bars, for shock absorption of the first floor slab;

[0008] A foam pad is provided between the first floor plate and the elastic member;

[0009] a second floor slab, arranged on top of the first floor slab;

[0010] Telescopic rods are provided at the four corners of the second floor slab to support the second floor slab;

[0011] The third damping member is arranged between the second floor plate and the first floor plate and is used for reducing vibration of the second floor plate.

[0012] Furthermore, the side wall of the first floor slab is provided with a convex plate, and the side wall of the convex plate is provided with a sliding groove. The elastic member includes a sleeve plate fixed on the beam, and a movable slider sliding in the sliding groove is provided in the sleeve plate. An extrusion component is sleeved on the reinforcing steel bar, and a first damping member is also provided on the sleeve plate. One side of the extrusion component slides in the sleeve plate and is connected to the first damping member.

[0013] Furthermore, the extrusion assembly includes an extrusion plate that is sleeved on the reinforcing steel bar, and deflection pressure plates are rotatably provided on both sides of the extrusion plate. A movable groove is opened on the inner wall of the sleeve plate, and a sliding rod is provided in the movable groove. A limit slider sleeved on the sliding rod is rotatably provided at one end of the deflection pressure plate away from the extrusion plate, and the limit slider is connected to the first damping member.

[0014] Furthermore, a limiting rod is provided on the limiting sliding block, a groove is provided on the convex plate, a second damping member is provided in the groove, and the limiting rod can extend into the groove and push the second damping member.

[0015] Furthermore, the first damping member includes a base plate fixed in the movable groove, a sleeve is provided on the base plate, a first cavity and a second cavity are opened in the sleeve, and the first cavity is connected to the second cavity through a through hole, an airbag is provided in the second cavity, a push rod is inserted into the sleeve, one end of the push rod is connected to the limiting slider, and the other end of the push rod extends into the first cavity and is connected to the piston plate, and a reset spring is provided between the sleeve and the limiting slider and is sleeved on the push rod. The structures of the second damping member and the third damping member are the same as those of the first damping member.

[0016] Furthermore, a tensile component is provided at the bottom of the second floor slab, and a compressive component is provided in the first floor slab and is sleeved on the reinforcing steel bar. One end of the compressive component is connected to the extrusion plate, and the other end of the compressive component is connected to the tensile component.

[0017] Furthermore, the compression component includes a connecting block connected to the tensile component, the connecting block is sleeved on the reinforcing steel bar, a compression sleeve is provided on one side of the connecting block, the compression sleeve is sleeved on the reinforcing steel bar, the end of the compression sleeve away from the connecting block is connected to the extrusion plate, and a limit spring sleeved on the compression sleeve is provided between the connecting block and the inner wall of the first floor slab.

[0018] Furthermore, the stretching assembly includes a first push plate connected to the connecting block, and a rotating block is fixedly provided at the bottom of the second floor plate, on which a second push plate is rotatably provided, and one end of the second push plate away from the rotating block is rotatably connected to the first push plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention changes the current situation that traditional prefabricated floor slabs have no shock absorption ability by providing prefabricated floor slabs. It can increase the ability of prefabricated floor slabs to automatically adjust deformation, improve seismic performance, and reduce earthquake damage to buildings. It can also eliminate the need for support of prefabricated floor slabs, thereby improving construction efficiency. At the same time, the middle layer of the floor slabs adopts insulation boards and honeycomb structures, which not only ensures the structural strength of the middle layer, but also improves the sound insulation and heat preservation performance of the floor slabs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 is a top view of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection between the foam pad and the elastic member of the present invention;

[0024] Figure 3 is a top view of the first floor of the present invention;

[0025] Figure 4 It is a schematic diagram of the installation of the second floor plate and the first floor plate of the present invention;

[0026] Figure 5 is a schematic diagram of the connection between the second floor slab and the first floor slab of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the elastic member of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection between the extrusion assembly and the sleeve plate of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the extrusion assembly of the present invention;

[0030] Figure 9 is a schematic structural diagram of the first damping member of the present invention;

[0031] Figure 10 It is a structural schematic diagram of the pressure component of the present invention.

[0032] In the figure: 1. first floor plate; 11. convex plate; 12. second damping member; 2. reinforcing steel bar; 3. angle steel support; 4. elastic member; 41. sleeve plate; 411. slide rod; 412. movable slider; 42. extrusion assembly; 421. extrusion plate; 422. deflection pressure plate; 423. limit slider; 43. first damping member; 431. bottom plate; 432. sleeve; 433. first cavity; 434. second cavity; 435. through hole; 436. push rod; 437. piston plate; 438. return spring; 44. limit rod; 45. pressure assembly; 451. connecting block; 452. pressure sleeve; 453. limit spring; 5. foam pad; 6. second floor plate; 61. first push plate; 62. rotating block; 63. second push plate; 7. telescopic rod; 8. third damping member. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] Reference Figure 1-Figure 3 As shown, this embodiment provides a simple structure;

[0036] A support-free, shock-absorbing, and sound-insulating prefabricated floor slab with adaptive deformation adjustment includes a first floor slab 1, wherein reinforcing steel bars 2 are provided inside the first floor slab 1, and angle steel supports 3 are provided on the side walls of the first floor slab 1, so as to realize support-free installation, and further includes:

[0037] Elastic members 4 are provided at both ends of the reinforcing steel bars 2. One side of the first floor slab 1 of the elastic member 4 is fixed to the crossbeam. That is, the first floor slab 1 can slide horizontally relative to the elastic member 4. When vibration occurs, the first floor slab 1 can slide horizontally to reduce the vibration of the first floor slab 1.

[0038] The foam pad 5 is provided between the first floor slab 1 and the elastic member 4. When the first floor slab 1 vibrates horizontally, the foam pad 5 can be squeezed to deform, thereby improving the displacement and deformation capacity of the entire floor slab.

[0039] The honeycomb-shaped insulation board 10 is arranged in the first floor slab 1 to improve the sound insulation and thermal insulation of the floor slab.

[0040] First, bend the end of the reinforcing steel bar 2 to make an end bent steel bar, thereby forming an elastic member 4; after the first floor slab 1 and the top floor reinforcing steel bar 2 are tied, the angle steel support 3 is welded to the end of the reinforcing steel bar 2, and then the foam board 5 is installed within a certain range of the end of the reinforcing steel bar 2; first lay the bottom steel mesh on the formwork and pour the bottom concrete, then lay the flexible insulation board 10, and pour the middle

[0041] The interlayer concrete forms a honeycomb-shaped intermediate layer structure, and finally the top steel mesh is laid and the top concrete is poured to form an integral prefabricated first floor slab 1; when the prefabricated first floor slab 1 is hoisted on site, the angle steel supports 3 at the ends of the reinforcing steel bars 2 can be used to form a support, so that the first floor slab 1 is supported on the prefabricated beam supports on all sides; the cast-in-place sections around the first floor slab 1 are cast on site to form the entire floor slab; the elastic member 4, i.e., the spring end can be stretched and deformed in the insulation board 10, and at the same time, the spring end not in the insulation board 10 can still ensure the effective anchoring force of the steel bar due to the bending anchorage, and then when the structure is subjected to force, the reinforcing steel bars 2 in the first floor slab 1 can automatically adapt to the deformation and displacement of the structure. When encountering an earthquake, the deformation capacity within the plane of the first floor slab 1 is increased, while also ensuring the stiffness of the first floor slab 1, which can absorb earthquake energy and play a shock-absorbing effect; the middle layer of the first floor slab 1 adopts the insulation board 10 and the honeycomb structure. The insulation board 10 can improve the sound insulation and thermal insulation performance of the floor slab, and the honeycomb structure can ensure the structural strength of the middle layer.

[0042] The self-adaptive deformation-adjustable, support-free, shock-absorbing, and sound-insulating fully prefabricated floor slab (shock-absorbing floor slab) changes the current situation of traditional prefabricated floor slabs without shock-absorbing capabilities. It can increase the ability of prefabricated floor slabs to automatically adjust deformation, improve seismic performance, and reduce earthquake damage to buildings. It can also eliminate the need for support for prefabricated floor slabs, thereby improving construction efficiency. At the same time, the middle layer of the floor slab adopts insulation board and honeycomb structure, which not only ensures the structural strength of the middle layer, but also improves the sound insulation and heat preservation performance of the floor slab.

[0043] In terms of economic benefits:

[0044]

[0045] According to calculations:

[0046] The comprehensive cost unit price of the shock-absorbing floor is 184 yuan / m 2 The comprehensive cost unit price of traditional composite panels is 180 yuan / m 2 , the cost remains basically the same.

[0047] Shock-absorbing floor slabs integrate shock absorption, sound insulation and thermal insulation functions, with high integration and improved floor quality.

[0048] It can eliminate the need for floor support, reduce on-site pouring workload by 90%, and shorten floor construction period by 80%.

[0049] Due to the built-in insulation board, the traditional 3cm thick LC15 full-light concrete floor insulation layer can be eliminated, reducing the floor building thickness and increasing the indoor clearance.

[0050] At the same time, the support-free, shock-absorbing and sound-insulating fully prefabricated floor slabs with adaptive deformation adjustment can be used in prefabricated floor slabs of various civil and public buildings.

[0051] Reference Figures 4-10 As shown, on the basis of the above, some reinforcement structures for facing vertical vibration are added and combined with the lateral deformation capacity of the first floor slab 1:

[0052] For example, the second floor 6 is arranged on the top of the first floor 1, and the second floor 6 can move up and down relative to the first floor 1. When the floor vibrates vertically, the second floor 6 can vibrate up and down.

[0053] Telescopic rods 7 are provided at the four corners of the second floor 6 to support the second floor 6;

[0054] The third damping member 8 is arranged between the second floor 6 and the first floor 1 and is used to reduce the vibration of the second floor 6. When the second floor 6 vibrates, it will dissipate energy together with the third damping member 8, thereby achieving a shock-absorbing effect.

[0055] In one embodiment, a convex plate 11 is provided on the side wall of the first floor slab 1, and a sliding groove is formed on the side wall of the convex plate 11. The elastic member 4 includes a sleeve plate 41 fixed to the crossbeam, and a movable slider 412 is provided in the sleeve plate 41 and slides in the sliding groove. An extrusion assembly 42 is sleeved on the reinforcing steel bar 2, and a first damping member 43 is further provided on the sleeve plate 41. One side of the extrusion assembly 42 slides in the sleeve plate 41 and is connected to the first damping member 43.

[0056] When the first floor slab 1 vibrates horizontally, one side of the first floor slab 1 will slide toward the sleeve plate 41 on that side, and the convex plate 11 will push the extrusion assembly 42, which will squeeze the first damping member 43 through the extrusion assembly 42, while the other side of the first floor slab 1 will pull the extrusion assembly 42, and the extrusion assembly 42 will pull the first damping member 43. The first damping members 43 on both sides will be used to dissipate energy from the vibration, thereby achieving a shock absorption effect.

[0057] In one embodiment, the extrusion assembly 42 includes an extrusion plate 421 that is sleeved on the reinforcing steel bar 2. Deflection pressure plates 422 are rotatably provided on both sides of the extrusion plate 421. A movable groove is provided on the inner wall of the sleeve plate 41. A slide rod 411 is provided in the movable groove. A limit slider 423 that is sleeved on the slide rod 411 is rotatably provided on one end of the deflection pressure plate 422 away from the extrusion plate 421. The limit slider 423 is connected to the first damping member 43.

[0058] When the first floor slab 1 vibrates, the extrusion plate 421 on one side slides toward the side sleeve plate 41, and the extrusion plate 421 pushes the deflection pressure plate 422, which deflects, thereby pushing the first damping member 43 through the limiting slider 423, and the extrusion plate 421 on the other side will pull the extrusion plate 421, and the extrusion plate 421 pulls the deflection pressure plate 422 to deflect, and the deflection pressure plate 422 will pull the first damping member 43 through the limiting slider 423.

[0059] In one embodiment, a limiting rod 44 is further provided on the limiting slider 423. Initially, there is a certain distance between the limiting rod 44 and the convex plate 11. A groove is provided on the convex plate 11, and a second damping member 12 is provided in the groove. The limiting rod 44 can extend into the groove and push the second damping member 12; since the convex plate 11 moves toward the sleeve plate 41, the limiting rod 44 will be close to the convex plate 11. If the vibration is large and the first damping member 43 is insufficient to meet the shock absorption requirement, when the deflection pressure plate 422 pushes the first damping member 43 to the limit, the limiting slider 423 will open to both sides, allowing the limiting rod 44 to contact the convex plate 11, and at this time the limiting rod 44 is aligned with the groove. When the first floor slab 1 continues to displace, the limiting rod 44 will be inserted into the groove and squeeze the second damping member 12.

[0060] In one embodiment, the first damping member 43 includes a base plate 431 fixed in the movable groove, a sleeve 432 is provided on the base plate 431, a first cavity 433 and a second cavity 434 are opened in the sleeve 432, and the first cavity 433 is connected to the second cavity 434 through a through hole 435, an airbag is provided in the second cavity 434, a push rod 436 is inserted into the sleeve 432, one end of the push rod 436 is connected to the limiting slider 423, and the other end of the push rod 436 extends into the first cavity 433 and is connected to the piston plate 437, a return spring 438 is provided between the sleeve 432 and the limiting slider 423 and is sleeved on the push rod 436, and the structures of the second damping member 12 and the third damping member 8 are the same as those of the first damping member 43.

[0061] In one embodiment, a tensile component is further provided at the bottom of the second floor slab 6, and a compressive component 45 is provided inside the first floor slab 1 and sleeved on the reinforcing steel bar 2. One end of the compressive component 45 is connected to the extrusion plate 421, and the other end of the compressive component 45 is connected to the tensile component. The compressive component 45 itself also has a certain degree of elasticity.

[0062] The compression assembly 45 has two functions. During vertical vibration, when the second floor slab 6 moves downward, the compression assembly 45 is pushed by the tension assembly, causing the compression assembly 45 to expand in all directions. This first compresses the compression assembly 45 and simultaneously compresses the third damping element 8. When the compression assembly 45 moves outward, it pushes the extrusion plate 421, thereby squeezing the first damping element 43.

[0063] When the horizontal vibration is large, as mentioned before, when the extrusion assembly 42 on one side starts the second damping member 12, a similar situation will occur in the extrusion assembly 42 on the other side. Specifically, the extrusion plate 421 on the other side will pull the deflection pressure plates 422 at both ends until the deflection pressure plates 422 are perpendicular to the extrusion plates 421. At this time, the first floor 1 continues to move, and the extrusion plate 421 will be subjected to tension and stop, forcing the extrusion plate 421 to separate from the convex plate 11, and the pressure assembly 45 is fixedly connected to the extrusion plate 421, that is, the pressure assembly 45 will also stop, and the first floor 1 will squeeze the pressure assembly 45. At the same time, when the first floor 1 is displaced relative to the pressure assembly 45, it will pull the tensile assembly in the opposite direction, thereby causing the second floor 6 on this side to move downward, compressing the third damping member 8, and using the elastic force of the pressure assembly 45 and the third damping member 8 to dissipate energy.

[0064] In one embodiment, the compression component 45 includes a connecting block 451 connected to the tensioning component, the connecting block 451 is sleeved on the reinforcing steel bar 2, a compression sleeve 452 is provided on one side of the connecting block 451, the compression sleeve 452 is sleeved on the reinforcing steel bar 2, the end of the compression sleeve 452 away from the connecting block 451 is connected to the extrusion plate 421, and a limit spring 453 sleeved on the compression sleeve 452 is provided between the connecting block 451 and the inner wall of the first floor 1; when vertical vibration occurs, the second floor 6 moves downward, and the connecting block 451 will be pushed through the tensioning component, and the connecting block 451 will push the extrusion plate 421 through the compression sleeve 452, and the extrusion plate 421 will be used to squeeze the first damping member 43, and the limit spring 453 will also be compressed and in a contracted state.

[0065] In one embodiment, the stretching assembly includes a first push plate 61 connected to the connecting block 451, and a rotating block 62 is fixedly provided at the bottom of the second floor 6, and a second push plate 63 is rotatably provided on the rotating block 62, and the end of the second push plate 63 away from the rotating block 62 is rotatably connected to the first push plate 61.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A self-adaptive deformation-adjustable, support-free, shock-absorbing, and sound-insulating prefabricated floor slab, comprising a first floor slab (1), wherein reinforcing steel bars (2) are provided in the first floor slab (1), and angle steel supports (3) are provided on the side walls of the first floor slab (1), characterized in that: Also includes: Elastic members (4) are provided at both ends of the reinforcing steel bars (2) and are used for shock absorption of the first floor slab (1); A foam pad (5) is arranged between the first floor plate (1) and the elastic member (4); A honeycomb-shaped insulation board (10) is arranged in the first floor slab (1) and is used to improve the sound insulation and heat preservation effects of the first floor slab (1); A second floor plate (6) is further provided on the first floor plate, and telescopic rods (7) are provided at the four corners of the second floor plate (6) for supporting the second floor plate (6), and a third damping member (8) is provided between the second floor plate (6) and the first floor plate (1) for reducing vibration of the second floor plate (6); The side wall of the first floor slab (1) is provided with a convex plate (11), and the side wall of the convex plate (11) is provided with a sliding groove. The elastic member (4) includes a sleeve plate (41) fixed on the crossbeam, and a movable slider (412) is provided in the sleeve plate (41) and slides in the sliding groove. The reinforcing steel bar (2) is sleeved with an extrusion component (42), and the sleeve plate (41) is further provided with a first damping member (43). One side of the extrusion component (42) slides in the sleeve plate (41) and is connected to the first damping member (43). The extrusion assembly (42) includes an extrusion plate (421) sleeved on the reinforcing steel bar (2), deflection pressure plates (422) are rotatably provided on both sides of the extrusion plate (421), a movable groove is provided on the inner wall of the sleeve plate (41), a slide rod (411) is provided in the movable groove, and a limiting slider (423) sleeved on the slide rod (411) is rotatably provided on one end of the deflection pressure plate (422) away from the extrusion plate (421), and the limiting slider (423) is connected to the first damping member (43); The limiting slider (423) is further provided with a limiting rod (44), the convex plate (11) is provided with a groove, a second damping member (12) is provided in the groove, and the limiting rod (44) can extend into the groove and push the second damping member (12); The first damping member (43) includes a base plate (431) fixed in the movable groove, a sleeve (432) is provided on the base plate (431), a first cavity (433) and a second cavity (434) are provided in the sleeve (432), and the first cavity (433) is connected to the second cavity (434) through a through hole (435), an air bag is provided in the second cavity (434), a push rod (436) is inserted into the sleeve (432), one end of the push rod (436) is connected to the limiting slider (423), and the other end of the push rod (436) extends into the first cavity (433) and is connected to the piston plate (437), a return spring (438) is provided between the sleeve (432) and the limiting slider (423) and is sleeved on the push rod (436), and the structures of the second damping member (12) and the third damping member (8) are the same as those of the first damping member (43).

2. The self-adaptive deformation-adjustable, support-free, shock-absorbing, and sound-insulating prefabricated floor slab according to claim 1, characterized in that: A tensile component is further provided at the bottom of the second floor slab (6), and a compression component (45) sleeved on the reinforcing steel bar (2) is provided in the first floor slab (1), one end of the compression component (45) is connected to the extrusion plate (421), and the other end of the compression component (45) is connected to the tensile component.

3. The self-adaptive deformation-adjustable, support-free, shock-absorbing, and sound-insulating prefabricated floor slab according to claim 2, characterized in that: The compression assembly (45) includes a connecting block (451) connected to the tension assembly, the connecting block (451) being sleeved on the reinforcing steel bar (2), a compression sleeve (452) being provided on one side of the connecting block (451), the compression sleeve (452) being sleeved on the reinforcing steel bar (2), an end of the compression sleeve (452) away from the connecting block (451) being connected to the extrusion plate (421), and a limit spring (453) being sleeved on the compression sleeve (452) being provided between the connecting block (451) and the inner wall of the first floor slab (1).

4. The self-adaptive deformation-adjustable, support-free, shock-absorbing, and sound-insulating prefabricated floor slab according to claim 3, characterized in that: The stretching assembly includes a first push plate (61) connected to the connecting block (451), a rotating block (62) is fixedly provided at the bottom of the second floor plate (6), a second push plate (63) is rotatably provided on the rotating block (62), and an end of the second push plate (63) away from the rotating block (62) is rotatably connected to the first push plate (61).

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