An intelligent unmanned tower crane lifting device

Abstract

The present invention belongs to the field of tower cranes, and particularly relates to an intelligent unmanned tower crane lifting device, which comprises a top sleeve, an outer sleeve, an inner rod, a reset spring, a guide wheel, a guide sleeve, a limit rod, a tower section frame, a clamping block A, a lifting mechanism, and an electric push rod, which are installed at the lower end of a slewing seat through high-strength bolts, wherein the top sleeve is nested outside a plurality of tower sections frame stacked and connected together in sequence through high-strength bolts, two layers of outer sleeves are installed on the inner side of the top sleeve, and each layer has eight symmetrical outer sleeves; the transmission connection cooperation between any two relative telescopic structures where the guide wheels are located can effectively prevent the slewing seat from shaking relative to the tower section frame due to the imbalance between the balance arm and the lifting arm during the lifting process, and at the same time, the transmission connection cooperation between any two relative telescopic structures where the guide wheels are located can ensure that the tower section frame with an inaccurate or deformed production shape will not be stuck with the guide wheel during the lifting process.

Description

Technical Field

[0001] The invention belongs to the field of tower cranes, and in particular relates to an intelligent unmanned tower crane jacking device. Background Art

[0002] Tower crane is the most commonly used lifting equipment on construction sites. It is also called "tower crane". It is connected in length (height) section by section (referred to as "standard section") and is used to lift construction materials such as steel bars, wooden slats, concrete, steel pipes, etc. Tower crane is an indispensable equipment on construction sites.

[0003] Before using the tower crane, it is necessary to adjust the tower frame by adjusting the position of the hoisting trolley and then lift the tower frame. The operation of adjusting the balance is cumbersome and inefficient. Before lifting, the guide wheel on the top sleeve and the section frame need to be adjusted to a suitable distance. Otherwise, during lifting, the guide wheel and the section frame bracket may be stuck due to inaccurate or deformed production shape of the section frame, and the gap between the guide wheel and the section frame may cause the tower body to shake due to improper balance adjustment during the lifting process.

[0004] Traditionally, the balance adjustment and the gap adjustment between the guide wheel and the frame require workers to strictly follow the installation and operation procedures, which is inefficient. For the intelligent unmanned tower crane, how to achieve reliable balance adjustment and jacking without jamming is the first problem to be solved.

[0005] The present invention designs an intelligent unmanned tower crane jacking device so that the tower crane does not need balance adjustment during the jacking process and will not cause problems caused by non-adjustment, thereby providing technical support for subsequent intelligent unmanned operation. Summary of the invention

[0006] In order to solve the defects in the prior art, the present invention discloses an intelligent unmanned tower crane lifting device, which is implemented by adopting the following technical solutions.

[0007] It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the invention product is usually placed when in use, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific direction, be constructed or operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0008] An intelligent unmanned tower crane lifting device, which includes a top sleeve, an outer sleeve, an inner rod, a reset spring, a guide wheel, a guide sleeve, a limit rod, a tower section frame, a block A, a lifting mechanism, and an electric push rod, which are installed on the lower end of a slewing seat through high-strength bolts, wherein the top sleeve is nested outside a plurality of tower sections stacked and connected in sequence through high-strength bolts, and two layers of outer sleeves are installed on the inner side of the top sleeve, and each layer has eight symmetrical outer sleeves; each outer sleeve is provided with an inner rod sliding in a direction perpendicular to the side of the four square columns of the top sleeve and is provided with a pair of inner rods A return spring for motion reset, a guide wheel that is against the side wall of the top sleeve is installed at the end of the inner rod; each limit groove on the side wall of the inner rod corresponds to a limit rod, the limit rod slides vertically in the guide sleeve on the top sleeve, and each limit rod is transmission-connected to the inner rod where the relative guide wheel is located; when the top sleeve swings relative to the tower body section frame, the slight contraction of the inner rod where the guide wheel with increased force is located will drive the limit rod corresponding to the relative guide wheel to release the contraction restriction on the corresponding inner rod and effectively limit the large swing of the top sleeve relative to the tower body section frame.

[0009] The top sleeve is hinged with two lifting mechanisms symmetrically distributed on both sides of the receiving platform on the top sleeve for lifting the slewing seat upward and effectively limiting the swing of the top sleeve relative to the tower section frame; the lifting mechanism is driven by the electric push rod on the top sleeve to swing and cooperate with the corresponding grooves of the two clamping blocks A on the tower section frame; there is a structure between the top sleeve and the tower section frame to prevent the top sleeve from descending relative to the tower section frame when the top sleeve is lifted to half the height of the tower section frame; during the lifting process, the two relative guide wheels will be subjected to increased force at the same time due to the sudden increase in the external dimensions of the tower section frame they pass through, and the corresponding two inner rods will simultaneously undergo a slight contraction, respectively driving the limit rods connected to them in transmission to instantly release the contraction restriction on the corresponding inner rods, so that the two relative guide wheels will not get stuck due to passing over the part with increased external dimensions on the tower section frame.

[0010] As a further improvement of the present technology, two guide blocks are symmetrically mounted on the inner rod, and the two guide blocks slide in two guide grooves on the inner wall of the corresponding outer sleeve respectively; the reset spring is a compression spring.

[0011] As a further improvement of the present technology, the teeth on the limit rod mesh with the gear A installed in the corresponding guide sleeve, and the gear B installed on the shaft where the gear A is located meshes with the rack installed on the relative inner rod.

[0012] As a further improvement of the present technology, the inner rod is fixedly connected to the corresponding rack through a synchronization rod, and the synchronization rod slides horizontally in the guide rail on the top sleeve; the pitch circle diameter ratio of gear A and the corresponding gear B is greater than 1.

[0013] As a further improvement of the present technology, the lifting mechanism includes a hydraulic cylinder, a shoulder pole beam, a top plate, a top pin, and a leaf spring, wherein the ends of two hydraulic cylinders parallel to each other are hinged with a shoulder pole beam, and two cylindrical top pins are symmetrically installed at both ends of the shoulder pole beam, which cooperate with the groove of the block A on the tower section frame; the middle part of the shoulder pole beam has a top plate that cooperates with the corresponding electric push rod; a high elastic coefficient leaf spring is installed between the two hydraulic cylinders to limit the change of the distance between the two.

[0014] As a further improvement of the present technology, four blocks B are symmetrically hingedly installed on the inner side of the top sleeve through swing pins, and each swing pin is embedded with a vortex spring for swinging and resetting the corresponding block B; four limit swing blocks are installed on the top sleeve, which correspond one-to-one with the blocks B and are used to prevent the blocks B from swinging upward from a horizontal state.

[0015] Compared with the traditional tower crane jacking device, the present invention does not need to manually adjust the tower body precisely before jacking, and does not need to adjust the gap between the guide wheel and the tower body section frame, which reduces the process and effectively improves the jacking efficiency.

[0016] The 16 guide wheels in the present invention always keep close contact with the tower section frame due to the transmission connection between any two relative telescopic structures where the guide wheels are located, and there is no need to adjust the gap between the guide wheels and the tower section frame before jacking, which saves processes and has high efficiency. The transmission connection between any two relative telescopic structures where the guide wheels are located can effectively prevent the slewing seat from shaking relative to the tower section frame due to the imbalance between the balance arm and the lifting arm during the lifting process. At the same time, the transmission connection between any two relative telescopic structures where the guide wheels are located ensures that the tower section frame with an inaccurate or deformed appearance will not get stuck with the guide wheels during the jacking process.

[0017] In addition, the reciprocating swing of the hydraulic cylinder during the lifting process of the slewing seat is completed by an electric push rod, which achieves a certain degree of unmanned operation and provides effective technical support for the subsequent intelligent unmanned operation of the tower crane.

[0018] The invention has a simple structure and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the tower crane.

[0020] Figure 2 It is a schematic diagram of the coordination between the top sleeve and the tower body section frame and their cross-section.

[0021] Figure 3 It is a cross-sectional schematic diagram of the coordination between the eight guide wheels on the same layer of the top sleeve and the tower body segment frame.

[0022] Figure 4 It is a cross-sectional schematic diagram of the cooperation between the two relatively guide wheels on the top sleeve and the tower body segment frame.

[0023] Figure 5 It is a schematic cross-sectional view of the telescopic structure.

[0024] Figure 6 It is a cross-sectional schematic diagram of the distribution of hydraulic cylinders on both sides of the tower section.

[0025] Figure 7 It is a schematic diagram of the coordination of the top sleeve, paired hydraulic cylinders, shoulder beams and tower section frames.

[0026] Figure 8 It is a cross-sectional diagram of the coordination of the top sleeve, the swing pin, the clamp block B, the clamp block A and the tower section frame.

[0027] Fig. 9 This is a schematic diagram of the tower section frame.

[0028] Fig.10 This is a schematic diagram of the coordination of two hydraulic cylinders and a shoulder pole beam.

[0029] Fig.11 It is a cross-sectional schematic diagram of the transmission cooperation between two telescopic structures.

[0030] The names of the numbers in the figure are: 1. slewing seat; 2. balance arm; 3. lifting arm; 4. lifting trolley; 5. top sleeve; 6. receiving platform; 7. lifting mechanism; 8. outer sleeve; 9. guide groove; 10. inner rod; 11. limit groove; 12. guide block; 13. reset spring; 14. guide wheel; 15. guide sleeve; 16. limit rod; 17. gear A; 18. gear B; 19. rack; 20. synchronization rod; 21. tower section frame; 22. block A; 23. hydraulic cylinder; 24. shoulder beam; 25. top plate; 26. lift pin; 27. leaf spring; 28. electric push rod; 29. ​​swing pin; 30. block B; 31. vortex spring; 32. swing limit block. DETAILED DESCRIPTION

[0031] The accompanying drawings are schematic diagrams of the present invention, which are provided to facilitate understanding of the operating principle of the structure. The specific product structure and proportional dimensions can be determined according to the use environment combined with conventional technology.

[0032] like Figure 1 , 2 As shown in FIG. 3 , it includes a top sleeve 5, an outer sleeve 8, an inner rod 10, a return spring 13, a guide wheel 14, a guide sleeve 15, a limit rod 16, a tower section frame 21, a block A22, a jacking mechanism 7, and an electric push rod 28, which are installed on the lower end of the slewing seat 1 through high-strength bolts. Figure 2 , 3 As shown, the top sleeve 5 is nested outside a plurality of tower body sections 21 stacked and connected in sequence by high-strength bolts, and two layers of outer sleeves 8 are installed inside the top sleeve 5, each layer having eight symmetrical outer sleeves 8; Figure 3 ,4 As shown in FIG. 5 , each outer sleeve 8 has an inner rod 10 sliding in a direction perpendicular to the side of the square column of the top sleeve 5 and is equipped with a return spring 13 for returning the movement of the inner rod 10. A guide wheel 14 is installed at the end of the inner rod 10 to abut against the side wall of the top sleeve 5; Figure 5 , 11 As shown, the limiting groove 11 on the side wall of each inner rod 10 corresponds to the limiting rod 16, and the limiting rod 16 vertically slides in the guide sleeve 15 on the top sleeve 5. Each limiting rod 16 is transmission-connected to the inner rod 10 where the relative guide wheel 14 is located; Figure 4 , 11 As shown, when the top sleeve 5 swings relative to the tower section frame 21, the slight contraction of the inner rod 10 where the guide wheel 14 with increased force is located will drive the limit rod 16 corresponding to the guide wheel 14 to release the contraction restriction on the corresponding inner rod 10 and effectively limit the large-scale swing of the top sleeve 5 relative to the tower section frame 21.

[0033] like Figure 6 , 7 As shown in FIG. 10 , the top sleeve 5 is hinged with two lifting mechanisms 7 symmetrically distributed on both sides of the receiving platform 6 on the top sleeve 5 for lifting the slewing seat 1 upward and effectively limiting the swing of the top sleeve 5 relative to the tower section frame 21; Figure 6 , 7 As shown in 9, the lifting mechanism 7 is driven by the electric push rod 28 on the top sleeve 5 to swing and cooperate with the corresponding two card slots A22 on the tower section frame 21; Figure 7 , 8 As shown, there is a structure between the top sleeve 5 and the tower section frame 21 to prevent the top sleeve 5 from falling relative to the tower section frame 21 when the top sleeve 5 is lifted to half the height of the tower section frame 21; Figure 4 , 11 As shown, during the jacking process, the two relative guide wheels 14 will be subjected to increased force at the same time due to the sudden increase in the external dimensions of the tower section frame 21 they pass through, and the corresponding two inner rods 10 will simultaneously undergo a slight contraction, thereby driving the limit rods 16 connected thereto to instantly release the contraction restrictions on the corresponding inner rods 10, so that the two relative guide wheels 14 will not get stuck because they pass over the part with increased external dimensions on the tower section frame 21.

[0034] like Figure 5 As shown, two guide blocks 12 are symmetrically mounted on the inner rod 10, and the two guide blocks 12 slide in two guide grooves 9 on the inner wall of the corresponding outer sleeve 8 respectively; the return spring 13 is a compression spring.

[0035] like Figure 5 , 11 As shown, the teeth on the limit rod 16 mesh with the gear A17 installed in the corresponding guide sleeve 15, and the gear B18 installed on the shaft where the gear A17 is located meshes with the rack 19 installed on the relative inner rod 10.

[0036] like Fig.11 As shown, the inner rod 10 is fixedly connected to the corresponding rack 19 through a synchronous rod 20, and the synchronous rod 20 slides horizontally in the guide rail on the top sleeve 5. The ratio of the pitch circle diameter of the gear A17 and the corresponding gear B18 is greater than 1, ensuring that the inner rod 10 can drive the corresponding limiting rod 16 to quickly disengage from the limiting groove 11 on the inner rod 10 corresponding to the relative guide wheel 14 through a series of transmissions when it undergoes a very small displacement.

[0037] like Figure 7 , 9 As shown in Figure 10, the lifting mechanism 7 includes a hydraulic cylinder 23, a shoulder pole beam 24, a top plate 25, a top pin 26, and a leaf spring 27, wherein the ends of the two hydraulic cylinders 23, whose upper ends are ball-jointed with the top sleeve 5 and are parallel to each other, are hinged with a shoulder pole beam 24, and two cylindrical top pins 26 that cooperate with the grooves of the block A22 on the tower section frame 21 are symmetrically installed at both ends of the shoulder pole beam 24; the middle part of the shoulder pole beam 24 has a top plate 25 that cooperates with the corresponding electric push rod 28; a high elastic coefficient leaf spring 27 that limits the change of the distance between the two hydraulic cylinders 23 is installed between the two hydraulic cylinders 23.

[0038] like Figure 7 , 8 As shown, four blocks B30 are symmetrically hingedly installed on the inner side of the top sleeve 5 through a swing pin 29, and each swing pin 29 is embedded with a vortex spring 31 for swinging and resetting the corresponding block B30; four limit swing blocks 32 are installed on the top sleeve 5, which correspond to the blocks B30 one by one and are used to prevent the blocks B30 from swinging upward from a horizontal state.

[0039] The hydraulic cylinder 23 and the electric push rod 28 in the present invention both adopt the existing technology.

[0040] The working process of the present invention is as follows: in the initial state, the slewing seat 1 and the tower body section frame 21 are in a bolt-tightened state, and any two adjacent tower body sections 21 are in a bolt-tightened state. The shoulder beam 24 in each lifting mechanism 7 is in a drooping state, the top pin 26 on the shoulder beam 24 is out of the slot of the block A22 on the tower body section frame 21, the hydraulic cylinder 23 is in the shortest contraction state, and the two electric push rods 28 are in a contraction state. The four blocks B30 are all overlapped on the corresponding blocks A22 on a certain tower body section frame 21, and the vortex spring 31 is in a compressed state. The 16 guide wheels 14 are all against the side walls of the tower body section frame 21 and the elastic forces generated by all the reset springs 13 are equal, and all the limit rods 16 are inserted into the limit grooves 11 on the corresponding inner rods 10.

[0041] When the tower body needs to be lifted and raised, the two electric push rods 28 are started, and the two electric push rods 28 respectively push the two push pins 26 on the shoulder beam 24 in the corresponding lifting mechanism 7 to move toward the slots on the corresponding block A22. At the same time, the hydraulic cylinders 23 in the two lifting mechanisms 7 are started to extend, so that the push pins 26 in the two lifting mechanisms 7 enter the slots on the corresponding block A22 respectively, and then the electric push rods 28 are started to retract to the initial state.

[0042] Next, the fastening bolts between the slewing seat 1 and the tower section frame 21 are removed. After the bolts between the slewing seat 1 and the tower section frame 21 are completely removed, the hydraulic cylinders 23 in the two jacking mechanisms 7 are started to extend, so that the top sleeve 5 moves vertically upward relative to the tower section frame 21, and each block B30 is disengaged from the corresponding block A22. The sixteen guide wheels 14 rotate under the action of the tower section frame 21 to reduce the rising resistance of the top sleeve 5.

[0043] When the top sleeve 5 rises to half the height of the tower section frame 21, each block B30 meets the new block A22 again and swings down under the action of the corresponding block A22, and then swings up over the block A22 under the reset action of the corresponding vortex spring 31. At this time, the hydraulic cylinder 23 in the jacking mechanism 7 begins to shrink, and the top sleeve 5 falls back a small distance and stops moving because the block overlaps the block A22. During the retraction process of the hydraulic cylinder 23, the top pin 26 in the jacking mechanism 7 is separated from the upper slot of the block A22, and the hydraulic rod B drives the shoulder beam 24 to return to the drooping state.

[0044] When the hydraulic cylinder 23 is retracted to about half the length of the tower section frame 21, the initial state is restored, and the two push pins 26 on the shoulder beam 24 of the jacking mechanism 7 are opposite to the new block A22. At this time, the two electric push rods 28 and the hydraulic cylinder 23 are started to extend at the same time, and the two electric push rods 28 swing the shoulder beam 24 in the corresponding jacking mechanism 7 toward the new block A22. When the push pin 26 enters the slot on the block A22, the electric push rod 28 is retracted to the initial state. As the hydraulic cylinder 23 continues to extend, the top sleeve 5 moves vertically upward relative to the tower section frame 21 again.

[0045] When the top sleeve 5 rises to half the height of the tower section frame 21 again, each block B30 meets the new block A22 again and swings down under the action of the corresponding block A22, and then swings up over the block A22 under the reset action of the corresponding vortex spring 31. At this time, the hydraulic cylinder 23 in the jacking mechanism 7 is retracted again, and the top sleeve 5 falls back a small distance and stops moving because the block overlaps the block A22. During the retraction process of the hydraulic cylinder 23, the top pin 26 in the jacking mechanism 7 is disengaged from the upper slot of the block A22, and the hydraulic rod B drives the shoulder beam 24 to return to the drooping state again.

[0046] At this time, the distance between the slewing seat 1 and the topmost tower section frame 21 is just the height of one tower section frame 21. The new tower section frame 21 is hoisted to the platform by the lifting trolley 4, and rollers are installed at the bottom of the new tower section frame 21 and manually pulled into the top sleeve 5 under the slewing seat 1.

[0047] When the tower section frame 21 on the platform is completely pulled into the top sleeve 5 and completely docked with the lower tower section frame 21, the locking groove of the fixed block A on the new tower section frame 21 is just opposite to the corresponding locking block on the lower tower section frame 21, and the locking block on the new tower section frame 21 is just opposite to the locking groove on the corresponding fixed block A on the slewing seat 1. At this time, all the electric push rods 28B are driven to extend, and the electric push rods 28B push the corresponding slide rods to move, and the slide rods drive the corresponding two locking blocks to be tightly inserted into the locking grooves of the corresponding fixed blocks A. The limiting rod 16B is instantly inserted into the limiting groove 11B on the slide rod under the action of the corresponding spring D and completes the locking of the locking block in the locking groove, thereby completing the bolt tightening of the slewing seat 1 and the new tower section frame 21 and the new tower section frame 21 and the lower tower section frame 21.

[0048] During the lifting process, if the balance arm 2 and the lifting arm 3 on the top of the tower are not in a balanced state, the top sleeve 5 will have a swinging tendency relative to the tower body frame 21 due to the unbalanced moment, and the lateral pressure of the tower body frame 21 on the guide wheel 14 on the side with small moment will increase, and the lateral pressure of the tower body frame 21 on the guide wheel 14 on the side with large moment will decrease. The guide wheel 14 with increased force drives the corresponding inner rod 10 to shrink a small distance into the outer sleeve 8, and then stops because the limit rod 16 reaches the limit movement in the limit groove 11. The moving inner rod 10 drives the limit rod 16 corresponding to the inner rod 10 where the guide wheel 14 with reduced force on the opposite side is located through the corresponding synchronization rod 20, rack 19, gear B18 and gear A17 to quickly disengage from the corresponding limit groove 11 and release the movement restriction of the inner rod 10 corresponding to the guide wheel 14 with reduced force.

[0049] The inner rod 10 corresponding to the guide wheel 14 on the side subjected to increased force stops moving after generating a small movement and prevents the top sleeve 5 from swinging significantly relative to the tower section frame 21 through the guide wheel 14, thereby ensuring that the top sleeve 5 will not swing significantly relative to the tower section frame 21 when it is jacking up the rotating seat 1 due to the lack of precise leveling in the early stage, thereby achieving effective jacking while saving the leveling process and improving efficiency.

[0050] During the jacking process, if the outer dimensions of the tower section frame 21 through which the guide wheel 14 passes suddenly increase, the guide wheel 14 passing through the enlarged portion of the tower section frame 21 makes the relative guide wheel 14 receive the reaction of the top sleeve 5 through the top sleeve 5, so that the guide wheel 14 passing through the enlarged portion of the tower section frame 21 and the guide wheel 14 opposite to it simultaneously drive the corresponding inner rod 10 to retract into the outer sleeve 8, and the inner rod 10 where the two guide wheels 14 are located respectively drive the corresponding limit rods 16 to quickly disengage from the corresponding limit grooves 11 through the corresponding synchronization rods 20, racks 19, gears B18 and gears A17, and release the movement restrictions of the two inner rods 10 corresponding to the guide wheel 14 passing through the enlarged portion of the tower section frame 21 and the guide wheel 14 opposite to it, so that the guide wheel 14 passing through the enlarged portion of the tower section frame 21 and the guide wheel 14 opposite to it can easily pass over the enlarged portion of the tower section frame 21 without getting stuck, thereby realizing effective heightening and jacking of the tower crane.

[0051] In summary, the beneficial effects of the present invention are as follows: the present invention does not require manual precise adjustment and balance of the tower body before jacking, and does not require adjustment of the gap between the guide wheel 14 and the tower body segment frame 21, thereby reducing the number of procedures and effectively improving the jacking efficiency.

[0052] The 16 guide wheels 14 in the present invention always keep close contact with the tower section frame 21 due to the transmission connection between any two relative telescopic structures where the guide wheels 14 are located, and there is no need to adjust the gap between the guide wheels 14 and the tower section frame 21 before jacking, which saves processes and has high efficiency. The transmission connection between any two relative telescopic structures where the guide wheels 14 are located can effectively prevent the slewing seat 1 from shaking relative to the tower section frame 21 due to the imbalance of the balance arm 2 and the lifting arm 3 during the lifting process. At the same time, the transmission connection between any two relative telescopic structures where the guide wheels 14 are located ensures that the tower section frame 21 with an inaccurate or deformed appearance will not get stuck with the guide wheels 14 during the jacking process.

[0053] In addition, the reciprocating swing of the hydraulic cylinder 23 during the lifting process of the slewing seat 1 is completed by the electric push rod 28, which achieves a certain degree of unmanned operation and provides effective technical support for the subsequent intelligent unmanned operation of the tower crane.

Claims

1. An intelligent unmanned tower crane lifting device, characterized in that: It comprises a top sleeve, an outer sleeve, an inner rod, a reset spring, a guide wheel, a guide sleeve, a limit rod, a tower frame, a block A, a lifting mechanism and an electric push rod, which are installed at the lower end of a slewing seat by high-strength bolts, wherein the top sleeve is nested outside a plurality of tower frames which are stacked and connected in sequence by high-strength bolts, two layers of outer sleeves are installed on the inner side of the top sleeve, and each layer has eight symmetrical outer sleeves; an inner rod is slid in a direction perpendicular to the side surfaces of the four square columns of the top sleeve in each outer sleeve, and a reset spring for resetting the movement of the inner rod is installed, and a guide wheel which abuts against the side wall of the tower frame is installed at the end of the inner rod; the limit grooves on the side walls of each inner rod correspond to the limit rods, and the limit rods slide vertically in the guide sleeves on the top sleeve, and each limit rod is connected to the inner rod where the relative guide wheel is located by transmission; when the top sleeve swings relative to the tower frame, the slight contraction of the inner rod where the guide wheel with increased force is located will drive the limit rod corresponding to the relative guide wheel to release the contraction restriction on the corresponding inner rod and effectively limit the large swing of the top sleeve relative to the tower frame; The top sleeve is hinged with two lifting mechanisms symmetrically distributed on both sides of the receiving platform on the top sleeve for lifting the slewing seat upward and effectively limiting the swing of the top sleeve relative to the tower section frame; the lifting mechanism is driven by the electric push rod on the top sleeve to swing and cooperate with the corresponding grooves of the two clamping blocks A on the tower section frame; there is a structure between the top sleeve and the tower section frame to prevent the top sleeve from descending relative to the tower section frame when the top sleeve is lifted to half the height of the tower section frame; during the lifting process, the two relative guide wheels will be subjected to increased force at the same time due to the sudden increase in the external dimensions of the tower section frame they pass through, and the corresponding two inner rods will simultaneously undergo a slight contraction, respectively driving the limit rods connected to them in transmission to instantly release the contraction restriction on the corresponding inner rods, so that the two relative guide wheels will not get stuck due to passing over the part with increased external dimensions on the tower section frame.

2. The intelligent unmanned tower crane lifting device according to claim 1 is characterized in that: Two guide blocks are symmetrically mounted on the inner rod, and the two guide blocks slide in two guide grooves on the inner wall of the corresponding outer sleeve respectively; the reset spring is a compression spring.

3. The intelligent unmanned tower crane lifting device according to claim 1 is characterized in that: The teeth on the limit rod mesh with the gear A installed in the corresponding guide sleeve, and the gear B installed on the shaft where the gear A is located meshes with the rack installed on the relative inner rod.

4. The intelligent unmanned tower crane lifting device according to claim 3 is characterized in that: The inner rod is fixedly connected to the corresponding rack through a synchronous rod, and the synchronous rod slides horizontally in the guide rail on the top sleeve; the ratio of the pitch circle diameter of gear A to the corresponding gear B is greater than 1.

5. The intelligent unmanned tower crane lifting device according to claim 1 is characterized in that: The lifting mechanism includes a hydraulic cylinder, a shoulder pole beam, a top plate, a top pin, and a leaf spring, wherein the ends of two hydraulic cylinders parallel to each other and connected to the top sleeve ball joint at the upper ends are hinged with the shoulder pole beam, and two cylindrical top pins that cooperate with the slots of the block A on the tower section frame are symmetrically installed at both ends of the shoulder pole beam; the middle part of the shoulder pole beam is provided with a top plate that cooperates with the corresponding electric push rod; a high elastic coefficient leaf spring that limits the change of the distance between the two hydraulic cylinders is installed between the two hydraulic cylinders.

6. The intelligent unmanned tower crane lifting device according to claim 1 is characterized in that: The inner side of the top sleeve is symmetrically hinged with four blocks B through swing pins, and each swing pin is embedded with a vortex spring for swinging and resetting the corresponding block B; the top sleeve is equipped with four limit swing blocks that correspond to the blocks B one by one and are used to prevent the blocks B from swinging upward from a horizontal state.

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