A tower crane with telescopic arm function

Abstract

The present invention relates to the technical field of tower cranes, and discloses a tower crane with a telescopic arm function, wherein a counterweight assembly is provided on one side of the rotating platform, and a lifting assembly is provided on the other side of the rotating platform, the pressure-bearing frame is connected to the counterweight assembly through a first arm force connecting rod, and the pressure-bearing frame is connected to the middle and top of the lifting assembly through a second arm force connecting rod and a third arm force connecting rod, respectively. The present invention can extend the lifting length of the tower crane and improve the lifting distance of the tower crane by telescopic adjustment of the extendable and adjustable lifting assembly under the synchronous weighting of the counterweight assembly, especially for workplaces with a high construction density, through the locking and positioning of the lifting extension mechanism by the locking mechanism, and the extended sliding of the lifting extension mechanism on the arm force supporting mechanism, the lifting distance of the tower crane can be telescopically adjusted, thereby improving its lifting function and adapting to different workplaces.

Description

Technical Field

[0001] The invention relates to the technical field of tower cranes, in particular to a tower crane with a telescopic arm function. Background Art

[0002] Tower crane is the most commonly used lifting equipment on construction sites, also known as "tower crane", or "tower crane" for short. It increases in height with standard sections one by one and is used to lift raw materials for construction such as steel bars, wooden slats, concrete, steel pipes, etc. Tower crane is an indispensable equipment on construction sites. The function of the tower crane tip is to bear the upper load transmitted by the boom rope and the balance arm rope, and transmit it directly to the tower structure through the turntable through structural components such as the rotating tower, turntable, and bearing.

[0003] In the process of using, the length of the tower arm of the existing tower crane is mostly fixed, and the lifting length is limited. At the same time, it cannot cope with construction work in different environments. Especially for construction sites with high building density, the tower arm length of the tower crane cannot be extended too much to avoid collision between two adjacent tower cranes. Therefore, those skilled in the art provide a tower crane with a telescopic arm function to solve the problems raised in the above background technology. Summary of the invention

[0004] The object of the present invention is to provide a tower crane with a telescopic arm function to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tower crane with a telescopic arm function, comprising a standard section, a rotating table is arranged at the top of the standard section, a counterweight assembly is arranged on one side of the rotating table, and a lifting assembly is arranged on the other side of the rotating table, a pressure-bearing frame is arranged at the top of the rotating table, a first arm force link is connected to one side of the pressure-bearing frame, and the pressure-bearing frame is connected to the counterweight assembly through the first arm force link, a third arm force link and a second arm force link are connected to the other side of the pressure-bearing frame in sequence from top to bottom, and the pressure-bearing frame is connected to the middle and top of the lifting assembly through the second arm force link and the third arm force link respectively.

[0006] As a further scheme of the present invention: the counterweight assembly includes an arm support arranged on one side of the top end of the rotating table, a counterweight block is arranged at the top of the arm support, and a first I-shaped guide rail is arranged below the arm support, a first transmission rack is arranged at the bottom position on the front side of the first I-shaped guide rail, and a pushing guide rail frame is sleeved on the outer side of the first I-shaped guide rail, an auxiliary weight block is arranged at the bottom of the pushing guide rail frame, and a first transmission motor is arranged at the front position inside the chamber of the pushing guide rail frame, a transmission gear is arranged at the output end of the first transmission motor, and the transmission gear is meshed and connected with the first transmission rack through a synchronous gear.

[0007] As a further solution of the present invention: the weight of the auxiliary weight block is half of the weight of the counterweight block.

[0008] As a further solution of the present invention: the number of the synchronous gears is two groups, and the synchronous gears are located on both sides of the transmission gear, and the teeth of the synchronous gears are meshed with the teeth of the transmission gear and the first transmission rack.

[0009] As a further solution of the present invention: the lifting assembly includes an arm force support mechanism arranged on the other side of the rotating platform, a lifting extension mechanism is arranged below the crossbeam support rod in the arm force support mechanism, and the lifting extension mechanism is connected through a locking mechanism;

[0010] The arm force support mechanism includes three groups of crossbeam support rods symmetrically connected to the other side of the rotating platform, one end of the crossbeam support rod is provided with a connecting seat, and the other end of the crossbeam support rod is provided with a mounting seat, the crossbeam support rod is fixedly connected through a triangular bracket, and a second I-shaped guide rail is provided below the crossbeam support rod, and a second transmission rack is symmetrically provided at the bottom position on both sides of the front and rear of the second I-shaped guide rail;

[0011] The lifting extension mechanism comprises an extension rail frame sleeved on the outside of the second I-shaped rail, a crane rail is arranged below the extension rail frame, and a second transmission motor is symmetrically arranged at the front and rear positions of the chamber of the extension rail frame, and the output end of the second transmission motor is provided with a driving gear meshing with the second transmission rack;

[0012] The locking mechanism includes two groups of locking sockets symmetrically arranged at the two ends of the extended guide rail frame, the inner wall of the locking socket is symmetrically provided with abutment grooves, and a locking rod is penetrated and engaged with the inner side of the locking socket, a transmission chamber is opened on the inner side of the locking rod, and a transmission screw is rotatably connected to the inner side of the transmission chamber, the output end of the transmission screw passes through the end face of the locking rod and is provided with a tightening handwheel, and two groups of transmission thread sleeves are symmetrically sleeved on the outer side of the transmission screw, and abutment buckles are symmetrically embedded and engaged between the outer side of the locking rod and the transmission thread sleeves.

[0013] As a further solution of the present invention: the transmission screw has two groups of threads, the threads are bounded by a center line, and symmetrically arranged positive and negative threads are respectively arranged on both sides of the center line. The transmission screw is symmetrically connected to the transmission thread sleeve through the positive and negative threads, the outer diameter of the transmission thread sleeve is matched with the inner diameter of the transmission chamber, and the transmission thread sleeve and the transmission chamber are both square structures.

[0014] As a further solution of the present invention: the lower half of the abutting buckle is a conical structure, and the upper half of the abutting buckle is an arc structure, the number of the abutting buckles and the abutting slots is the same, and the abutting buckles and the abutting slots correspond to each other one by one.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention replaces the traditional tower crane with a fixed tower boom length. Through the telescopic adjustment of the extendable and adjustable lifting assembly, the lifting length of the tower crane can be extended and the lifting distance of the tower crane can be increased under the synchronous weighting of the counterweight assembly. Especially for workplaces with a high construction density, the lifting extension mechanism is locked and positioned by a locking mechanism, and the lifting extension mechanism extends and slides on the arm support mechanism, so that the lifting distance of the tower crane can be telescopically adjusted, thereby improving its lifting function and adapting to different workplaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a tower crane with telescopic arm function;

[0018] Figure 2 It is a tower crane with telescopic arm function. Figure 1 The enlarged schematic diagram of point A in the middle;

[0019] Figure 3 It is a structural schematic diagram of a counterweight assembly in a tower crane with a telescopic arm function;

[0020] Figure 4 It is a structural schematic diagram of an arm force support mechanism of a tower crane with telescopic arm function;

[0021] Figure 5 It is a structural schematic diagram of a lifting and extending mechanism in a tower crane with a telescopic arm function;

[0022] Figure 6 It is a tower crane with telescopic arm function. Figure 1 The enlarged schematic diagram of point B in the middle;

[0023] Figure 7 The figure is a schematic diagram of the structure of a locking mechanism in a tower crane with a telescopic arm function.

[0024] In the figure: 1. standard section; 2. rotating table; 3. counterweight; 4. arm support; 5. first arm connecting rod; 6. pressure-bearing stand; 7. second arm connecting rod; 8. third arm connecting rod; 9. crossbeam support rod; 10. extension guide frame; 11. first I-shaped guide rail; 12. first transmission rack; 13. push guide frame; 14. auxiliary weight block; 15. first transmission motor; 16. transmission gear; 17. synchronous gear; 18. connecting seat; 19. mounting seat; 20. triangular support; 21. second I-shaped guide rail; 22. second transmission rack; 23. second transmission motor; 24. driving gear; 25. crane guide rail; 26. locking seat; 27. locking rod; 28. transmission chamber; 29. ​​tightening hand wheel; 30. transmission screw; 31. transmission screw sleeve; 32. abutment buckle; 33. abutment slot. DETAILED DESCRIPTION

[0025] See also Figures 1 to 7 In an embodiment of the present invention, a tower crane with a telescopic arm function includes a standard section 1, a rotating platform 2 is arranged at the top of the standard section 1, a counterweight assembly is arranged on one side of the rotating platform 2, and a lifting assembly is arranged on the other side of the rotating platform 2, a pressure-bearing frame 6 is arranged at the top of the rotating platform 2, a first arm force connecting rod 5 is connected to one side of the pressure-bearing frame 6, and the pressure-bearing frame 6 is connected to the counterweight assembly through the first arm force connecting rod 5, the counterweight assembly includes an arm support 4 arranged on one side of the top of the rotating platform 2, a counterweight block 3 is arranged on the top of the arm support 4, and a first I-shaped guide rail 11 is arranged below the arm support 4, a first transmission rack 12 is arranged at the bottom end position of the front side of the first I-shaped guide rail 11, and a pushing guide rail frame 13 is sleeved on the outer side of the first I-shaped guide rail 11, an auxiliary weight block 14 is arranged at the bottom of the pushing guide rail frame 13, and a first transmission motor 15 is arranged at the front position of the chamber of the pushing guide rail frame 13, and the first transmission motor A transmission gear 16 is provided at the output end of the machine 15, and the transmission gear 16 is meshed and connected with the first transmission rack 12 through a synchronous gear 17. The weight of the auxiliary weight block 14 is half of the weight of the counterweight block 3. There are two sets of synchronous gears 17, and the synchronous gears 17 are located on both sides of the transmission gear 16. The teeth of the synchronous gear 17 are meshed with the teeth of the transmission gear 16 and the first transmission rack 12. During the lifting process of the tower crane, when the tower boom length of the tower crane needs to be extended for lifting, the first transmission motor 15 works to drive the transmission gear 16 to rotate. Through the meshing transmission of the transmission gear 16 and the synchronous gear 17, the synchronous gear 17 is pushed to mesh and transmit on the first transmission rack 12, thereby pushing the push guide frame 13 to slide horizontally on the first I-shaped guide rail 11, and adjusting the position of the auxiliary weight block 14 so that the auxiliary weight block 14 is synchronously supported by the counterweight block 3 to balance the gravity, thereby improving the dynamic balance of the tower crane lifting.

[0026] The other side of the pressure-bearing frame 6 is connected with the third arm force link 8 and the second arm force link 7 in sequence from top to bottom, and the pressure-bearing frame 6 is connected to the middle and top of the lifting assembly through the second arm force link 7 and the third arm force link 8 respectively. The lifting assembly includes an arm force support mechanism arranged on the other side of the rotating table 2, and a lifting extension mechanism is arranged below the cross beam support rod 9 in the arm force support mechanism. The arm force support mechanism includes three groups of cross beam support rods 9 symmetrically connected to the other side of the rotating table 2, and one end of the cross beam support rod 9 is provided with a connecting seat 18, and the cross beam support rod 9 A mounting seat 19 is provided at the other end, the crossbeam support rod 9 is fixedly connected by a triangular bracket 20, and a second I-shaped guide rail 21 is provided below the crossbeam support rod 9, and a second transmission rack 22 is symmetrically provided at the bottom position on both sides of the front and rear of the second I-shaped guide rail 21, and the lifting extension mechanism includes an extension guide rail frame 10 sleeved on the outside of the second I-shaped guide rail 21, a crane guide rail 25 is provided below the extension guide rail frame 10, and a second transmission motor 23 is symmetrically provided at the front and rear positions of the chamber inside the extension guide rail frame 10, and the second The output end of the transmission motor 23 is provided with a driving gear 24 meshing with the second transmission rack 22. Two sets of adjacent beam support rods 9 are screwed together by the connecting seat 18 and the mounting seat 19, and the length of the extension guide frame 10 is the same as the length of the second I-shaped guide rail 21. During the hoisting process using the tower crane, the crane is assembled on the crane guide rail 25, so that the crane is assembled on the crane guide rail 25 and displaced and slid to perform the hoisting work. During the hoisting process, since the number of the extension guide frame 10 is three and the number of the beam support rods 9 is four, The group can make the extension guide frame 10 staggered and engaged on the second I-shaped guide rail 21, thereby improving the stability of the overall structure of the tower arm. When the tower arm of the tower crane needs to be extended and lifted, the second transmission motor 23 works to drive the drive gear 24 to rotate, and synchronously push the drive gear 24 to engage and transmit on the second transmission rack 22, so that the extension guide frame 10 slides on the second I-shaped guide rail 21, and the extension guide frame 10 is extended forward, and the crane guide rail 25 is synchronously extended forward, so that the crane has a longer distance lifting function.

[0027] The lifting extension mechanism is connected by a locking mechanism, which includes two sets of locking seats 26 symmetrically arranged at the two ends of the extension guide frame 10, the inner wall of the locking seat 26 is symmetrically provided with abutment slots 33, and the inner side of the locking seat 26 is penetrated and engaged with a locking rod 27, the inner side of the locking rod 27 is provided with a transmission chamber 28, the inner side of the transmission chamber 28 is rotatably connected with a transmission screw 30, the output end of the transmission screw 30 passes through the end face of the locking rod 27 and is provided with a tightening hand wheel 29, and the outer side of the transmission screw 30 is symmetrically sleeved with two sets of transmission screws. The outer side of the locking rod 27 is symmetrically embedded with the abutment buckle 32 for the transmission wire sleeve 31. The number of threads of the transmission screw 30 is two groups. The threads are bounded by the midline. Both sides of the midline are respectively provided with positive and negative threads symmetrically arranged with each other. The transmission screw 30 is symmetrically sleeved with the transmission wire sleeve 31 through the positive and negative threads. The outer diameter of the transmission wire sleeve 31 is adapted to the inner diameter of the transmission chamber 28, and the transmission wire sleeve 31 and the transmission chamber 28 are both square structures. The lower half of the abutment buckle 32 is a conical structure, and the upper half of the abutment buckle 32 is a conical structure. The upper portion is an arc-shaped structure, the number of the abutting buckles 32 and the abutting slots 33 is the same, and the abutting buckles 32 and the abutting slots 33 correspond to each other one by one. During the assembly and use of the tower crane, after the arm force support mechanism of the tower crane is assembled, the extension guide frame 10 is sleeved on the second I-shaped guide rail 21 in sequence, and the two adjacent groups of extension guide frames 10 are closely aligned synchronously, and then the staff inserts the locking rod 27 through the extension guide frame 10 into the adjacent locking seat 26, so that the abutting buckles 32 on the extension guide frame 10 are locked with the locking seat 26. The abutment slot 33 on the abutment buckle 32 is aligned. After the alignment is completed, the staff turns the tightening hand wheel 29 to drive the transmission screw 30 to rotate, and the transmission thread sleeve 31 is pushed to slide symmetrically through the positive and negative thread teeth symmetrically arranged on the transmission screw 30. During the symmetrical closing and sliding process, the transmission thread sleeve 31 symmetrically squeezes the conical structure of the lower half of the abutment buckle 32, pushes out the abutment buckle 32, and buckles it in the abutment slot 33, so that the locking rod 27 and the locking seat 26 are locked, thereby preventing the locking rod 27 from falling off and sliding.

[0028] The working principle of the present invention is as follows: during the lifting process of the tower crane, the crane is assembled on the crane guide rail 25, so that the crane is displaced and slid on the crane guide rail 25 to perform the lifting work, and during the lifting process, since the number of the extension guide rail frames 10 is three groups and the number of the crossbeam support rods 9 is four groups, the extension guide rail frame 10 can be staggered and engaged on the second I-shaped guide rail 21, thereby improving the stability of the overall structure of the tower arm. When the tower arm length of the tower crane needs to be extended for lifting, the second transmission motor 23 works to drive the driving gear 24 to rotate, and synchronously pushes the driving gear 24 to engage and transmit on the second transmission rack 22, so that the extension guide rail frame 10 is in the second working The first transmission motor 15 works to drive the transmission gear 16 to rotate, and the transmission gear 16 and the synchronous gear 17 are meshed and driven to engage and drive the synchronous gear 17 on the first transmission rack 12, thereby pushing the push guide frame 13 to slide horizontally on the first I-shaped guide rail 11, and adjusting the position of the auxiliary weight block 14, so that the auxiliary weight block 14 is synchronously supported by the counterweight block 3 to balance the gravity, thereby improving the dynamic balance of the tower crane hoisting.

[0029] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tower crane with telescopic arm function, comprising a standard section (1), characterized in that: A rotating platform (2) is arranged at the top of the standard section (1), a counterweight assembly is arranged on one side of the rotating platform (2), and a lifting assembly is arranged on the other side of the rotating platform (2), a pressure-bearing frame (6) is arranged at the top of the rotating platform (2), one side of the pressure-bearing frame (6) is connected to a first arm force link (5), and the pressure-bearing frame (6) is connected to the counterweight assembly through the first arm force link (5), and the other side of the pressure-bearing frame (6) is connected to a third arm force link (8) and a second arm force link (7) in sequence from top to bottom, and the pressure-bearing frame (6) is connected to the middle and top of the lifting assembly through the second arm force link (7) and the third arm force link (8), respectively; the lifting assembly comprises an arm force support mechanism arranged on the other side of the rotating platform (2), A lifting extension mechanism is provided below the crossbeam support rod (9) in the arm force support mechanism, and the lifting extension mechanism is connected via a locking mechanism; the arm force support mechanism comprises three groups of crossbeam support rods (9) symmetrically connected to the other side of the rotating platform (2), one end of the crossbeam support rod (9) is provided with a connecting seat (18), and the other end of the crossbeam support rod (9) is provided with a mounting seat (19), the crossbeam support rod (9) is fixedly connected via a triangular bracket (20), and a second I-shaped guide rail (21) is provided below the crossbeam support rod (9), and a second transmission rack (22) is symmetrically provided at the bottom position on both sides of the front and rear of the second I-shaped guide rail (21); the lifting extension mechanism comprises an extension guide rail sleeved on the outside of the second I-shaped guide rail (21) The extension guide rail frame (10) is provided with a crane guide rail (25) below the extension guide rail frame (10), and a second transmission motor (23) is symmetrically arranged at the front and rear sides of the chamber of the extension guide rail frame (10), and the output end of the second transmission motor (23) is provided with a driving gear (24) meshing with the second transmission rack (22); the locking mechanism comprises two sets of locking card seats (26) symmetrically arranged at the two ends of the extension guide rail frame (10), the inner wall of the locking card seat (26) is symmetrically provided with abutment grooves (33), and the inner side of the locking card seat (26) is penetrated and engaged with a locking rod (27), the inner side of the locking rod (27) is provided with a transmission chamber (28), and the inner side of the transmission chamber (28) is rotatably connected with a transmission gear (33). A movable screw (30), wherein the output end of the transmission screw (30) passes through the end surface of the locking rod (27) and is provided with a tightening hand wheel (29), and the outer side of the transmission screw (30) is symmetrically sleeved with two groups of transmission thread sleeves (31), and the outer side of the locking rod (27) is symmetrically embedded with abutment buckles (32) that are engaged with the transmission thread sleeves (31); the number of thread teeth of the transmission screw (30) is two groups, and the thread teeth are bounded by a center line, and positive and negative thread teeth that are symmetrically arranged on both sides of the center line are respectively provided, and the transmission screw (30) is symmetrically sleeved with the transmission thread sleeve (31) through the positive and negative thread teeth, and the outer diameter of the transmission thread sleeve (31) is adapted to the inner diameter of the transmission chamber (28), and the transmission thread sleeve (31) and the transmission chamber (28) are both square structures;The lower half of the abutting buckle (32) is a conical structure, and the upper half of the abutting buckle (32) is an arc structure, the abutting buckle (32) and the abutting slot (33) are the same in number, and the abutting buckle (32) and the abutting slot (33) correspond to each other one by one. ; 2. A tower crane with telescopic arm function according to claim 1, characterized in that: The counterweight assembly comprises an arm support (4) arranged on one side of the top end of the rotating platform (2); a counterweight block (3) is arranged at the top end of the arm support (4); a first I-shaped guide rail (11) is arranged below the arm support (4); a first transmission rack (12) is arranged at the bottom end of the front side of the first I-shaped guide rail (11); a push guide rail frame (13) is sleeved on the outer side of the first I-shaped guide rail (11); an auxiliary weight block (14) is arranged at the bottom of the push guide rail frame (13); a first transmission motor (15) is arranged at the front end of the chamber of the push guide rail frame (13); a transmission gear (16) is arranged at the output end of the first transmission motor (15); and the transmission gear (16) is meshedly connected with the first transmission rack (12) via a synchronous gear (17).

3. A tower crane with telescopic arm function according to claim 2, characterized in that: The weight of the auxiliary weight block (14) is half the weight of the counterweight block (3).

4. A tower crane with telescopic arm function according to claim 2, characterized in that: The number of the synchronous gears (17) is two groups, and the synchronous gears (17) are located on both sides of the transmission gear (16), and the teeth of the synchronous gears (17) are meshed with the teeth of the transmission gear (16) and the first transmission rack (12).

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