A portable servo construction elevator foundation intelligent top-return device

Abstract

This invention relates to the field of elevator construction technology and discloses a portable servo intelligent return device for the foundation of a construction elevator, including a standard section of the construction elevator and a base. This invention can monitor the load changes borne by the standard section of the construction elevator in real time. When the load exceeds a preset threshold, the controller automatically adjusts the extension and retraction of the hydraulic push rod to actively compensate for the support force, ensuring that the base and the standard section are always in a dynamic equilibrium state. This effectively prevents structural settlement or collapse caused by insufficient support force, significantly improving the stability of the construction elevator foundation support. Simultaneously, the locking assembly constructs a multi-level mechanical locking structure through precise positioning of the triangular insert and slot, the slotted engagement of the locking plate and boss, and the downward pressure reinforcement of the push plate and top block. This design not only enables rapid assembly and disassembly between the connecting plate and the circular plate but also effectively prevents loosening of the connection during hydraulic system operation, ensuring the stability of the mechanical structure and laying a solid foundation for the safe operation of the entire device.

Description

Technical Field

[0001] This invention belongs to the field of elevator construction technology, specifically, it relates to a portable servo construction elevator foundation intelligent return device. Background Technology

[0002] In the construction industry, construction elevators, as key equipment for the vertical transportation of personnel and materials, have always had their operational safety as a core concern in engineering projects. Currently, the foundation support of construction elevators typically uses traditional concrete bases combined with fixed support structures. This support method has revealed many problems that urgently need to be solved in practical applications.

[0003] On the one hand, traditional support structures are mostly static and fixed. When the construction elevator carries materials or personnel, the load on the foundation support system will change significantly. Static support structures cannot compensate for the support force in real time, which can easily lead to local stress concentration in the base, and thus cause the risk of structural settlement and cracking. On the other hand, existing support structures are connected by bolts. When the construction elevator operates for a long time and generates vibration or frequent load fluctuations, the bolts are very likely to loosen. Once the bolts loosen, gaps and displacements will appear at the connection positions of the support structure, resulting in a decrease in the stability of the entire support system.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A portable servo construction elevator foundation intelligent top-return device includes a standard section of the construction elevator and a base.

[0006] A hydraulic push rod is installed on the base, a circular plate is installed at the output end of the hydraulic push rod, a connecting plate is installed on the circular plate, and a locking assembly is provided between the connecting plate and the circular plate. The connecting plate is connected to the bottom of the standard section of the construction elevator, and a pressure sensor is installed on the top of the standard section of the construction elevator. The locking assembly includes an integrally cast insert and a boss. The insert is movably inserted into a connecting plate. A retaining plate is rotatably mounted on the bottom of the connecting plate and is rotatably engaged with the side wall of the boss. A pressure plate is mounted at the center of the retaining plate's rotation. The pressure plate is positioned above the connecting plate and is engaged with the insert. The connecting plate is plugged into a push plate for connecting the plug and the connecting plate, and a limiting rod for limiting the position of the pressure plate is installed around the connecting plate. The bottom of the push plate is fitted with a plug that is plugged into the pressure plate, the plug and the clamping plate.

[0007] In a preferred embodiment of the present invention, the base is made of concrete, the connection surface between the base and the hydraulic push rod is horizontal, and the base is in the shape of a boss.

[0008] In a preferred embodiment of the present invention, a pump body is mounted on the base, an input pipe is installed at the inlet of the pump body and is connected to a hydraulic oil tank, and four hydraulic pipes are installed at the outlet of the pump body. The ends of the hydraulic pipes are connected to the hydraulic cylinders on the corresponding hydraulic push rods, and the hydraulic pipes are used to input hydraulic oil to control the extension and retraction of the hydraulic push rods. Valves are installed on the hydraulic pipes, and the valve housings are mounted on the base. The pump body is connected to a controller.

[0009] In a preferred embodiment of the present invention, a pad is provided on the top of the standard section of the construction elevator, a top sleeve is installed on the top of the pad, a top rod is screwed onto the top sleeve, a top plate is installed on the top of the top rod, and a pressure sensor is installed on the top plate and connected to the controller.

[0010] In a preferred embodiment of the present invention, the bottom of the pad is provided with an inner groove, and the inner groove is movably sleeved on the outer wall of the standard section of the construction elevator, and the pad and the standard section of the construction elevator are connected by bolts.

[0011] In a preferred embodiment of the present invention, a slot is provided on the connecting plate, the plug is movably inserted into the slot, both the plug and the slot are triangular, the plug is located above the boss and the diameter of the plug is smaller than the support of the boss, the boss is placed below the slot and the bottom of the boss is mounted on a circular plate.

[0012] In a preferred embodiment of the present invention, a retaining shaft is rotatably mounted on the connecting plate. The top of the retaining shaft is connected to the rotation center of the pressure plate, and the bottom of the retaining shaft is connected to the rotation center of the retaining plate. A retaining groove is provided on the side wall of the boss, and the retaining groove is arc-shaped. The retaining groove is adapted to the retaining plate. A torsion spring is sleeved on the retaining shaft. One end of the torsion spring is engaged with the bottom of the connecting plate, and the other end is engaged with the retaining plate.

[0013] In a preferred embodiment of the present invention, a top block is installed at the bottom of the push plate, the top block corresponds to the upper surface of the boss, and an installation hole is opened at the center of the top block and the push plate. A bolt rod is inserted through the installation hole, and the bottom of the bolt rod is connected to the top of the top block. A locking nut is rotatably installed on the bolt rod.

[0014] In a preferred embodiment of the present invention, the pressure plate has a first through hole, the insert block has a through groove, and the card plate has a second through hole. The first through hole, the through groove, and the second through hole have the same cross-sectional area, and the first through hole, the through groove, and the second through hole are located on the same straight line. The first through hole, the through groove, and the second through hole are movably inserted into the insert plate.

[0015] In a preferred embodiment of the present invention, a guide groove is provided on the connecting plate, a baffle is slidably disposed inside the guide groove, a collar is installed on the baffle, the limiting rod is inserted into the collar, and a return spring is provided between the bottom of the baffle and the guide groove, wherein the compression direction of the return spring and the movement direction of the limiting rod are both on the same straight line.

[0016] Compared with the prior art, the present invention has the following advantages: This invention, through the coordinated operation of a hydraulic system and a pressure sensing system, can monitor the load changes borne by the standard section of the construction elevator in real time. When the load exceeds a preset threshold, the controller will automatically adjust the extension and retraction of the hydraulic push rod to actively compensate for the support force, ensuring that the base and the standard section are always in a dynamic equilibrium state. This effectively prevents structural settlement or collapse caused by insufficient support force and significantly improves the stability of the construction elevator foundation support. At the same time, the locking assembly constructs a multi-level mechanical locking structure through the precise positioning of the triangular insert and slot, the slotted engagement of the card plate and the boss, and the downward pressure reinforcement of the push plate and the top block. This design not only enables quick assembly and disassembly between the connecting plate and the circular plate, but also effectively prevents the connection from loosening when the hydraulic system is working, ensuring the stability of the mechanical structure and laying a solid foundation for the safe operation of the entire device.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram: Figure 1 A 3D diagram of a portable servo construction elevator foundation intelligent top-return device; Figure 2 This is an assembly diagram of a pad plate for a portable servo construction elevator foundation intelligent top-return device. Figure 3 A bottom view of the pad plate of a portable servo construction elevator foundation intelligent top-return device. Figure 4 A partial view of a portable servo construction elevator foundation intelligent jacking device Figure 1 ; Figure 5 A partial view of a portable servo construction elevator foundation intelligent jacking device Figure 2 ; Figure 6 A portable servo construction elevator foundation intelligent jacking device Figure 4 Enlarged view of point A in the middle; Figure 7 A cross-sectional view of the limit rod and connecting plate of a portable servo construction elevator foundation intelligent top-return device; Figure 8 A cross-sectional view of the connecting plate of a portable servo construction elevator foundation intelligent top-return device; Figure 9 A structural diagram of the slot of a portable servo construction elevator foundation intelligent top-return device; Figure 10 A cross-sectional view of the insertion block of a portable servo construction elevator foundation intelligent top-return device; Figure 11 A bottom view of the push plate of a portable servo construction elevator foundation intelligent top-return device.

[0019] In the picture: 1. Construction elevator standard section; 11. Base; 111. Hydraulic push rod; 112. Circular plate; 12. Pump body; 121. Input pipe; 122. Hydraulic pipe; 123. Valve; 13. Pad; 131. Inner groove; 132. Top sleeve; 133. Push rod; 134. Top plate; 135. Pressure sensor; 14. Connecting plate; 2. Insert block; 21. Slot; 211. Boss; 22. Card plate; 221. Card groove; 222. Card shaft; 223. Torsion spring; 224. Pressure plate; 225. First through hole; 226. Through groove; 227. Second through hole; 3. Push plate; 31. Top block; 311. Mounting hole; 312. Bolt rod; 313. Locking nut; 32. Insert plate; 33. Limiting rod; 331. Collar; 332. Baffle; 333. Guide groove; 334. Return spring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0021] Example 1:

[0022] like Figures 1 to 11 As shown, a portable servo construction elevator foundation intelligent top-return device includes a standard section 1 of the construction elevator and a base 11.

[0023] A hydraulic push rod 111 is installed on the base 11. A circular plate 112 is installed at the output end of the hydraulic push rod 111. A connecting plate 14 is installed on the circular plate 112, and a locking assembly is provided between the connecting plate 14 and the circular plate 112. The connecting plate 14 is connected to the bottom of the standard section 1 of the construction elevator, and a pressure sensor 135 is installed on the top of the standard section 1 of the construction elevator. The hydraulic push rod 111 can adjust the support force of the standard section 1 of the construction elevator. The pressure sensor 135 can monitor the force in real time, provide data support for intelligent control, and ensure the stability and safety of the device operation.

[0024] The locking assembly includes an integrally cast insert 2 and a boss 211. The insert 2 is movably inserted into the connecting plate 14. A retaining plate 22 is rotatably mounted on the bottom of the connecting plate 14, and the retaining plate 22 is rotatably engaged with the side wall of the boss 211. A pressure plate 224 is mounted at the center of rotation of the retaining plate 22. The pressure plate 224 is positioned above the connecting plate 14 and is engaged with the insert 2. The structural design of this locking assembly achieves mechanical locking through the cooperation of the insert 2 and the retaining plate 22. The pressure plate 224 further limits the connection, making the connection between the connecting plate 14 and the round plate 112 more secure and reliable, and preventing loosening during use.

[0025] The connecting plate 14 is fitted with a push plate 3 for connecting the insert block 2 and the connecting plate 14. Limiting rods 33 are installed around the connecting plate 14 to limit the position of the pressure plate 224. An insert plate 32 is installed at the bottom of the push plate 3, which interlocks with the pressure plate 224, the insert block 2, and the locking plate 22. The push plate 3 and the limiting rods 33 provide secondary fixation to the locking assembly, enhancing the stability of the overall structure. Simultaneously, the limiting rods 33 precisely limit the position of the pressure plate 224, ensuring the normal operation of the locking assembly.

[0026] like Figures 1 to 11 As shown, in a specific embodiment, the base 11 is made of concrete. The connection surface between the base 11 and the hydraulic push rod 111 is horizontal. The base 11 is in the shape of a boss. A pump body 12 is installed on the base 11. An input pipe 121 is installed at the inlet of the pump body 12. The input pipe 121 is connected to the hydraulic oil tank. Four hydraulic pipes 122 are installed at the outlet of the pump body 12. The ends of the hydraulic pipes 122 are connected to the hydraulic cylinders on the corresponding hydraulic push rods 111. The hydraulic pipes 122 are used to input hydraulic oil to control the extension and retraction of the hydraulic push rods 111. A valve 123 is installed on the hydraulic pipe 122. The outer shell of the valve 123 is installed on the base 11. The pump body 12 is connected to the controller. The base adopts a boss shape with a horizontal connecting surface, which can increase the contact area with the hydraulic push rod 111, so that the back support force is evenly distributed. At the same time, the boss structure can play a geometric guiding role, ensuring that the hydraulic push rod 111 applies force vertically, improving the stability and reliability of the support. The hydraulic system composed of the pump body 12 and hydraulic pipe 122 can precisely control the extension and retraction of the hydraulic push rod 111 through the controller, realizing flexible adjustment of the back force.

[0027] like Figures 1 to 11As shown, furthermore, a pad 13 is provided on the top of the standard section 1 of the construction elevator. A top sleeve 132 is installed on the top of the pad 13. A top rod 133 is screwed onto the top sleeve 132. A top plate 134 is installed on the top rod 133. A pressure sensor 135 is installed on the top plate 134 and is connected to the controller. An inner groove 131 is formed at the bottom of the pad 13 and is movably fitted onto the outer wall of the standard section 1 of the construction elevator. The pad 13 and the standard section 1 of the construction elevator are connected by bolts. The pad 13 is fitted onto the standard section through the inner groove 131 and fixed with bolts, which is convenient to install and ensures the stability of the connection. The top sleeve 132, top rod 133 and top plate 134 can stably install the pressure sensor 135 on the top of the standard section, accurately monitor the load pressure, and work with the controller to realize intelligent control of the hydraulic system to ensure force balance.

[0028] Example 2:

[0029] The difference between the above embodiments and this embodiment is that: Figures 1 to 11 As shown, a slot 21 is provided on the connecting plate 14. The insert 2 is movably inserted into the slot 21. Both the insert 2 and the slot 21 are triangular. The insert 2 is located above the boss 211, and the diameter of the insert 2 is smaller than the support of the boss 211. The boss 211 is located below the slot 21, and the bottom of the boss 211 is mounted on the circular plate 112. The triangular design of the insert 2 and the slot 21 utilizes the stability of the triangle to prevent the insert 2 from rotating within the slot 21, thereby enhancing the connection strength and reliability of the locking assembly.

[0030] like Figures 1 to 11 As shown, in a specific embodiment, a retaining shaft 222 is rotatably mounted on the connecting plate 14. The top of the retaining shaft 222 is connected to the rotation center of the pressure plate 224, and the bottom of the retaining shaft 222 is connected to the rotation center of the retaining plate 22. A retaining groove 221 is provided on the side wall of the boss 211, and the retaining groove 221 is arc-shaped and fits the retaining plate 22. A torsion spring 223 is sleeved on the retaining shaft 222. One end of the torsion spring 223 is engaged with the bottom of the connecting plate 14, and the other end is engaged with the retaining plate 22. The torsion spring 223 allows the retaining plate 22 to automatically rotate around the retaining shaft 222 and engage with the retaining groove 221 after being released, achieving rapid locking, improving installation efficiency, and ensuring a tight engagement between the retaining plate 22 and the boss 211, thus enhancing the stability of the locking assembly.

[0031] Example 3:

[0032] The difference between the above embodiments and this embodiment is that: Figures 1 to 11As shown, a top block 31 is installed at the bottom of the push plate 3. The top block 31 corresponds to the upper surface of the boss 211. A mounting hole 311 is opened at the center of the top block 31 and the push plate 3. A bolt rod 312 is inserted through the mounting hole 311, and the bottom of the bolt rod 312 is connected to the top of the top block 31. A locking nut 313 is rotatably installed on the bolt rod 312. The top block 31 and the boss 211 are correspondingly arranged. By tightening the bolt rod 312 and the locking nut 313, the top block 31 can apply downward pressure to the boss 211, further tightening the connection between the insert block 2 and the connecting plate 14, enhancing the firmness of the entire locking structure, and preventing loosening.

[0033] like Figures 1 to 11 As shown, in a specific embodiment, the pressure plate 224 has a first through hole 225, the insert block 2 has a through groove 226, and the clamping plate 22 has a second through hole 227. The first through hole 225, the through groove 226, and the second through hole 227 have the same cross-sectional area and are located on the same straight line. The first through hole 225, the through groove 226, and the second through hole 227 are movably inserted into the inserting plate 32. The inserting plate 32 passes through the first through hole 225, the through groove 226, and the second through hole 227 in sequence, thereby achieving linkage fixation of the pressure plate 224, the insert block 2, and the clamping plate 22. This makes the connection between the components of the locking assembly tighter and improves the stability and reliability of the overall structure.

[0034] like Figures 1 to 11 As shown, the connecting plate 14 further includes a guide groove 333, inside which a baffle 332 is slidably mounted. A collar 331 is installed on the baffle 332, and a limiting rod 33 is inserted into the collar 331. A return spring 334 is positioned between the bottom of the baffle 332 and the guide groove 333. The compression direction of the return spring 334 and the movement direction of the limiting rod 33 are both on the same straight line. The cooperation of the guide groove 333, baffle 332, collar 331, limiting rod 33, and return spring 334 can precisely limit the position of the push plate 3, preventing displacement during use. Simultaneously, the return spring 334 provides buffering and reset functions when the push plate 3 moves, ensuring the stability and reliability of the limiting structure.

[0035] The implementation principle of the portable servo construction elevator foundation intelligent top-return device of the present invention is as follows: During device installation, the construction of the base and hydraulic system begins first. A base 11, shaped like a boss, is cast in concrete, ensuring its connection surface with the hydraulic push rod 111 is horizontal. This boss structure offers two advantages: firstly, it effectively increases the contact area with the hydraulic push rod 111, allowing the back-pushing support force to be evenly distributed across the base, preventing damage due to localized stress concentration; secondly, the geometric guidance of the boss structure ensures that the hydraulic push rod 111 always applies a back-pushing force vertically. Next, the pump body 12 is fixedly installed on the base 11, and the input pipe 121 is connected to the hydraulic oil tank. Four hydraulic pipes 122 are installed at the outlet of the pump body 12, connecting the ends of the hydraulic pipes 122 to the hydraulic cylinders on the corresponding hydraulic push rods 111. Valves 123 are installed on the hydraulic pipes 122, and the valve housings are fixed to the base 11. Finally, the pump body 12 is connected to the controller. After completing the above operations, install the hydraulic push rod 111 on the base 11, ensuring that its output end faces upward.

[0036] Next, the standard section and connecting plate are assembled. A pad 13 is installed on top of the standard section 1 of the construction elevator, allowing the inner groove 131 at the bottom of the pad 13 to movably fit onto the outer wall of the standard section 1, and then secured with bolts. A top sleeve 132 is installed on top of the pad 13, and a push rod 133 is threaded onto the top sleeve 132. A top plate 134 is installed on top of the push rod 133, and a pressure sensor 135 connected to the controller is installed on the top plate 134. A circular plate 112 is installed at the output end of the hydraulic push rod 111, and a connecting plate 14 is installed on the circular plate 112. The connecting plate 14 and the circular plate 112 are connected by a locking assembly.

[0037] The specific installation steps of the locking assembly are as follows: First, rotate the locking plate 22 to cause the torsion spring 223 on the locking shaft 222 to twist, so that the locking plate 22 and the bottom of the slot 21 are separated. Then, insert the plug 2 into the slot 21 of the connecting plate 14. After releasing the locking plate 22, under the action of the torsion spring 223, the locking plate 22 rotates around the locking shaft 222 and is locked into the slot 221 of the boss 211. At this time, the pressure plate 224 is located above the connecting plate 14 and is locked above the plug 2, thereby completing the initial positioning of the plug 2.

[0038] Next, push plate 3 is assembled, and push plate 3 and bolt rod 312 are inserted together. Locking nut 313 is tightened on bolt rod 312, causing push plate 3 to move downward, so that the top block 31 at the bottom of push plate 3 contacts the upper surface of boss 211. As locking nut 313 is tightened, top block 31 applies downward pressure to boss 211, making the connection between insert block 2 and connecting plate 14 tighter. At the same time, insert plate 32 at the bottom of push plate 3 passes through the first through hole 225 of pressure plate 224, through groove 226 of insert block 2, and second through hole 227 of clamping plate 22, further fixing pressure plate 224, insert block 2, and clamping plate 22. During the downward movement of push plate 3, limiting rods 33 around connecting plate 14 are inserted into collar 331, baffle 332 slides in guide groove 333, and return spring 334 is compressed, thereby limiting the position of push plate 3 and preventing displacement during use. The installation of the entire device is thus completed.

[0039] Once the device is installed, the jacking operation can begin. The operator starts pump 12, which draws hydraulic oil from the hydraulic tank through input pipe 121 and delivers it to the hydraulic cylinder of hydraulic push rod 111 via hydraulic pipe 122, driving the push rod to extend or retract, thus achieving jacking support. When the construction elevator standard section 1 is under load, pressure sensor 135 monitors the pressure on the top plate 134 in real time. If the load exceeds a preset threshold, the controller immediately adjusts the output power of pump 12 and controls the flow of hydraulic oil through valve 123, causing hydraulic push rod 111 to extend upwards or retract downwards to compensate for changes in support force. This ensures that the forces between the base 11 and the construction elevator standard section 1 are always in a dynamic equilibrium, effectively preventing structural settlement or collapse due to insufficient support force. During the entire top-return operation, the hydraulic system, pressure sensing system, and mechanical locking assembly work together. The extension and retraction of the hydraulic push rod 111 is precisely controlled by the controller based on the signal fed back by the pressure sensor 135, ensuring that the supporting force can adapt to changes in load in real time. The mechanical locking assembly ensures that the connection between the connecting plate 14 and the circular plate 112 is stable and reliable, preventing loosening during the operation of the hydraulic system, thereby ensuring the safety and reliability of the entire device.

Claims

1. A portable servo construction elevator foundation intelligent return device, comprising a standard section (1) of the construction elevator and a base (11), characterized in that: A hydraulic push rod (111) is installed on the base (11), and a circular plate (112) is installed at the output end of the hydraulic push rod (111). A connecting plate (14) is installed on the circular plate (112), and a locking assembly is provided between the connecting plate (14) and the circular plate (112). The connecting plate (14) is connected to the bottom of the standard section (1) of the construction elevator, and a pressure sensor (135) is installed on the top of the standard section (1) of the construction elevator. The locking assembly includes an integrally cast insert (2) and a boss (211). The insert (2) is movably inserted into the connecting plate (14). A retaining plate (22) is rotatably mounted on the bottom of the connecting plate (14), and the retaining plate (22) is rotatably engaged with the side wall of the boss (211). A pressure plate (224) is mounted at the rotation center of the retaining plate (22). The pressure plate (224) is positioned above the connecting plate (14) and is engaged with the insert (2). The connecting plate (14) is inserted with a push plate (3) for connecting the plug (2) and the connecting plate (14), and a limiting rod (33) for limiting the position of the pressure plate (224) is installed around the connecting plate (14). The bottom of the push plate (3) is equipped with a plug plate (32) that is inserted into the pressure plate (224), the plug (2) and the card plate (22).

2. The portable servo construction elevator foundation intelligent top-return device according to claim 1, characterized in that, The base (11) is made of concrete. The connection surface between the base (11) and the hydraulic push rod (111) is horizontal. The base (11) is in the shape of a boss.

3. The portable servo construction elevator foundation intelligent top-return device according to claim 1, characterized in that, A pump body (12) is installed on the base (11). An input pipe (121) is installed at the inlet of the pump body (12). The input pipe (121) is connected to the hydraulic oil tank. Four hydraulic pipes (122) are installed at the outlet of the pump body (12). The end of the hydraulic pipe (122) is connected to the hydraulic cylinder on the corresponding hydraulic push rod (111). The hydraulic pipe (122) is used to input hydraulic oil to control the extension and retraction of the hydraulic push rod (111). A valve (123) is installed on the hydraulic pipe (122). The outer shell of the valve (123) is installed on the base (11). The pump body (12) is connected to the controller.

4. The portable servo construction elevator foundation intelligent top-return device according to claim 1, characterized in that, The construction elevator standard section (1) is provided with a pad plate (13) on top, a top sleeve (132) is installed on the top of the pad plate (13), a top rod (133) is provided on the top sleeve (132) by screwing on the top rod (133), a top plate (134) is installed on the top of the top rod (133), a pressure sensor (135) is installed on the top plate (134), and the pressure sensor (135) is connected to the controller.

5. The portable servo construction elevator foundation intelligent top-return device according to claim 4, characterized in that, The pad (13) has an inner groove (131) at the bottom, and the inner groove (131) is movably sleeved on the outer wall of the standard section (1) of the construction elevator, and the pad (13) and the standard section (1) of the construction elevator are connected by bolts.

6. The portable servo construction elevator foundation intelligent top-return device according to claim 1, characterized in that, The connecting plate (14) has a slot (21) and the plug (2) is movably inserted into the slot (21). Both the plug (2) and the slot (21) are triangular. The plug (2) is located above the boss (211) and the diameter of the plug (2) is smaller than the support of the boss (211). The boss (211) is placed below the slot (21) and the bottom of the boss (211) is mounted on the circular plate (112).

7. The portable servo construction elevator foundation intelligent top-return device according to claim 1, characterized in that, A retaining pin (222) is rotatably mounted on the connecting plate (14). The top of the retaining pin (222) is connected to the rotation center of the pressure plate (224), and the bottom of the retaining pin (222) is connected to the rotation center of the retaining plate (22). A retaining groove (221) is provided on the side wall of the boss (211), and the retaining groove (221) is arc-shaped. The retaining groove (221) is adapted to the retaining plate (22). A torsion spring (223) is sleeved on the retaining pin (222). One end of the torsion spring (223) is engaged with the bottom of the connecting plate (14), and the other end is engaged with the retaining plate (22).

8. The portable servo construction elevator foundation intelligent top-return device according to claim 1, characterized in that, The push plate (3) has a top block (31) installed at the bottom. The top block (31) corresponds to the upper surface of the boss (211). The top block (31) and the push plate (3) have a mounting hole (311) at the center. A bolt rod (312) is installed through the mounting hole (311). The bottom of the bolt rod (312) is connected to the top of the top block (31). A locking nut (313) is rotatably installed on the bolt rod (312).

9. A portable servo construction elevator foundation intelligent top-return device according to claim 1, characterized in that, The pressure plate (224) has a first through hole (225), the insert block (2) has a through groove (226), and the card plate (22) has a second through hole (227). The first through hole (225), the through groove (226), and the second through hole (227) have the same cross-sectional area, and the first through hole (225), the through groove (226), and the second through hole (227) are located on the same straight line. The first through hole (225), the through groove (226), and the second through hole (227) are movably inserted into the insert plate (32).

10. A portable servo construction elevator foundation intelligent top-return device according to claim 1, characterized in that, The connecting plate (14) is provided with a guide groove (333), and a baffle (332) is slidably arranged inside the guide groove (333). A collar (331) is installed on the baffle (332), and the limiting rod (33) is inserted into the collar (331). A reset spring (334) is provided between the bottom of the baffle (332) and the guide groove (333). The compression direction of the reset spring (334) and the movement direction of the limiting rod (33) are both on the same straight line.

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