Height adjusting device of tower crane

Abstract

The utility model discloses a height adjusting device of a tower crane, which relates to the technical field of tower cranes and comprises a cargo boom, an adjusting component arranged at the bottom of the cargo boom and comprises a vertical column, a clamping groove is arranged at the top of the vertical column, a screw rod is rotatably connected in the clamping groove at the top of the vertical column, and the cargo boom is connected with the screw rod in the clamping groove at the top of the vertical column. A second driven gear is connected to the screw rod, a second fixing shaft is arranged on the side, close to the second driven gear, of the stand column, a second transmission gear is arranged on the second fixing shaft, a belt is arranged between the second transmission gear and the second driven gear in a sleeving mode, and a rack is arranged on the side, close to the second driven gear, of the belt; according to the tower crane, the height of the cargo boom can be adjusted by arranging the adjusting assembly, so that the tower crane can more quickly adapt to the change of a construction site, and the time wasted by replacing the length of the cargo boom or adjusting the operation position is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, in particular to a height adjusting device for tower cranes. Background Art

[0002] The height adjustment device of a tower crane is a mechanism used to adjust and control the working height of the tower crane. It is crucial to ensure the safe and efficient operation of the tower crane under different working conditions.

[0003] An existing Chinese patent (publication number: CN209383294U) proposes a tower crane with a stable structure that is easy to adjust the height, including a cantilever and a rotating disk. A slide rail is provided under the cantilever. There are two rotating disks inside the sliding seat, and one side of the rotating disk is connected to the inner wall of the sliding seat through a transmission gear. The other sides of the two rotating disks are connected to the inner wall of the sliding seat. A steel wire rope is wrapped around the outer side of the rotating disk, a transmission chain is installed inside the sliding seat, a fixed ball is installed below the spring column, the lower end of the steel wire rope passes through the surface of the balance plate, and a cable is installed below the balance plate.

[0004] The above technical solution rotates a rotating disk in opposite directions to another rotating disk, and the two rotating disks rotate in opposite directions, while driving the wire rope to be wound or loosened. The two rotating disks are driven to rotate at the same time through the transmission chain, which is convenient for control.

[0005] In the above device, the lifting height can only be increased by adjusting the wire rope, while the height of the boom is fixed. If the boom height is not adjustable, then when a larger operating radius or a higher lifting height is required, the tower crane will not be able to meet the requirements, limiting its application in high-rise building construction. In addition, in the case of strong winds or uneven ground, the tower crane may overturn due to uneven force. Therefore, we propose a tower crane height adjustment device. Utility Model Content

[0006] The purpose of the utility model is to provide a height adjustment device for a tower crane to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a height adjustment device of a tower crane, comprising a boom, an adjustment assembly provided at the bottom of the boom, the adjustment assembly comprising a column, a slot provided at the top of the column, a screw rod rotatably connected in the slot at the top of the column, the boom is connected to the screw rod in the slot at the top of the column, a second driven gear is connected to the screw rod, a second fixed shaft is provided on the side of the column close to the second driven gear, a second transmission gear is provided on the second fixed shaft, a belt is sleeved between the second transmission gear and the second driven gear, a rack is provided on the side of the belt close to the second driven gear, the rack is meshed with the second driven gear and the second transmission gear, and a third motor is provided on the second fixed shaft.

[0008] As a preferred embodiment, an auxiliary component is provided on the side of the column close to the lifting arm, and the auxiliary component includes a first fixed seat, a first rotating rod is rotatably connected to the first fixed seat, an electric telescopic rod is connected to the first rotating rod, and an output end of the electric telescopic rod is connected to the second rotating rod, a second fixed seat is provided on the side of the lifting arm close to the second rotating rod, the second rotating rod is rotatably connected to the second fixed seat, and a screw is threadedly connected to the second fixed seat.

[0009] By adopting the above technical solution, auxiliary components are provided to support the boom during height adjustment and maintain its stability during adjustment.

[0010] As a preferred embodiment, a rotating assembly is provided at the bottom of the column, and the rotating assembly includes a connecting plate, and the top of the connecting plate is rotatably connected to a first driven gear, and the first driven gear is connected to the bottom of the column, and a first fixed shaft is provided on the side of the top of the connecting plate close to the first driven gear, and a first motor is provided on the top of the first fixed shaft, and a first transmission gear is provided on the first fixed shaft, and the first transmission gear is meshed with the first driven gear.

[0011] By adopting the above technical solution, by providing a rotating assembly, the crane can change the position of the hoisted object without moving the entire device.

[0012] As a preferred embodiment, a lifting assembly is provided on the lifting arm, and the lifting assembly includes a second motor. A clamp is provided on the side of the lifting arm close to the second motor, and a connecting shaft is rotatably connected in the clamp. A take-up roller is connected to the connecting shaft, and a rope is sleeved on the take-up roller. The side of the rope away from the take-up roller is sleeved on the rotating shaft, and a hanging piece is connected to the bottom of the rope.

[0013] The above technical solution is adopted: by setting up a lifting component, turning on the second motor to drive the take-up roller to rotate, so that the height of the lifted object can be adjusted.

[0014] As a preferred embodiment, a limiting assembly is provided on the side of the lifting arm close to the rope, and the limiting assembly includes a fixed frame, a bolt is threadedly connected to the fixed frame, a limiting piece is provided at the bottom of the fixed frame, a through hole is opened on the limiting piece, and the rope is slidably connected in the through hole.

[0015] The above technical solution is adopted: by setting a limit component, the rope is limited during its movement to ensure its stability.

[0016] As a preferred embodiment, a limiting plate is provided on a side of the clamping member close to the rope, and the rope is slidably connected in a limiting groove provided in the limiting plate.

[0017] The above technical solution is adopted: by setting a limit plate, the rope is guided during the process of being taken up to prevent it from falling off the take-up roller.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are:

[0019] In the present invention, by providing an adjustment component, the height of the boom can be adjusted, so that the tower crane can adapt to changes on the construction site more quickly, reducing the time wasted due to changing the boom length or adjusting the working position, and solving the problem that the lifting height can only be increased by adjusting the wire rope in the above-mentioned device, and the height of the boom is fixed. If the boom height is not adjustable, then when a larger operating radius or a higher lifting height is required, the tower crane will not be able to meet the requirements, limiting its application in high-rise building construction, and in the case of strong winds or uneven ground, the tower crane may overturn due to uneven force. By providing an auxiliary component, the boom height can be supported during adjustment to maintain its stability during adjustment. By providing a rotating component, the crane can change the position of the hoisted object without moving the entire equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a front view of a height adjustment device for a tower crane.

[0021] Figure 2 This is a disassembled diagram of a tower crane height adjustment device.

[0022] Figure 3 for Figure 2 Enlarged view of point B in the middle.

[0023] Figure 4 for Figure 1Enlarged view of point A in the middle.

[0024] Numbers in the figure:

[0025] 1. Crane arm;

[0026] 2. Rotating assembly; 21. Connecting plate; 22. First driven gear; 23. First transmission gear; 24. First fixed shaft; 25. First motor;

[0027] 3. Lifting assembly; 31. Second motor; 32. Clamp; 33. Connecting shaft; 34. Take-up roller; 35. Rope; 36. Limit plate; 37. Rotating shaft; 38. Lifting piece;

[0028] 4. Adjustment assembly; 41. Column; 42. Screw; 43. Second driven gear; 44. Belt; 45. Rack; 46. Second fixed shaft; 47. Second transmission gear; 48. Third motor;

[0029] 5. Auxiliary components; 51. First fixing base; 52. First rotating rod; 53. Electric telescopic rod; 54. Second fixing base; 55. Second rotating rod; 56. Screws;

[0030] 6. Limiting assembly; 61. Fixing frame; 62. Bolt; 63. Limiting piece. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1 and Figure 3As shown, a height adjustment device for a tower crane includes a boom 1, an adjustment assembly 4 is provided at the bottom of the boom 1, the adjustment assembly 4 includes a column 41, a slot is provided at the top of the column 41, a screw 42 is rotatably connected in the slot at the top of the column 41, the boom 1 is connected to the screw 42 in the slot at the top of the column 41, a second driven gear 43 is connected to the screw 42, a second fixed shaft 46 is provided on the side of the column 41 close to the second driven gear 43, a second fixed shaft 46 is provided on the second fixed shaft 46, and a second transmission gear 47 is provided between the second transmission gear 47 and the second driven gear 43. A belt 44 is provided, and a rack 45 is provided on one side of the belt 44 near the second driven gear 43. The rack 45 is meshed with the second driven gear 43 and the second transmission gear 47. A third motor 48 is provided on the second fixed shaft 46. When the third motor 48 is turned on, it drives the second fixed shaft 46 to rotate. The second fixed shaft 46 drives the second transmission gear 47 to rotate. The second transmission gear 47 drives the rack 45 and the belt 44 to move, thereby driving the second driven gear 43 to rotate. The second driven gear 43 drives the screw 42 to rotate, thereby driving the boom 1 to rotate and lift.

[0033] Furthermore, if Figure 4 As shown: a lifting assembly 3 is provided on the boom 1, and the lifting assembly 3 includes a second motor 31. A clamp 32 is provided on the side of the boom 1 close to the second motor 31. A connecting shaft 33 is rotatably connected in the clamp 32. A take-up roller 34 is connected to the connecting shaft 33. A rope 35 is sleeved on the take-up roller 34. The side of the rope 35 away from the take-up roller 34 is sleeved on the rotating shaft 37. The bottom of the rope 35 is connected to a hanging piece 38. When the second motor 31 is turned on, the connecting shaft 33 is driven to rotate. The connecting shaft 33 drives the take-up roller 34 to rotate. The take-up roller 34 drives the rope 35 to wind, thereby driving the hanging piece 38 to perform lifting and lowering movements.

[0034] The above solution also has the problem that when the boom 1 is rotated and raised, the bottom thereof is not supported and may easily lead to failure of the lifting. Figure 1 As shown: an auxiliary component 5 is provided on the side of the column 41 close to the boom 1, and the auxiliary component 5 includes a first fixed seat 51, a first rotating rod 52 is rotatably connected to the first fixed seat 51, an electric telescopic rod 53 is connected to the first rotating rod 52, and an output end of the electric telescopic rod 53 is connected to a second rotating rod 55. A second fixed seat 54 is provided on the side of the boom 1 close to the second rotating rod 55, the second rotating rod 55 is rotatably connected to the second fixed seat 54, and a screw 56 is threadedly connected to the second fixed seat 54. By providing the auxiliary component 5, the boom 1 can be supported during the height adjustment process to maintain its stability during adjustment;

[0035] The above solution also has the problem that when the rope 35 drives the hanger 38 to move, the rope 35 is not limited, which may easily cause the rope 35 to deviate from the original trajectory and slip. Figure 1 and Figure 4 As shown: a limiting assembly 6 is provided on the side of the boom 1 near the rope 35, the limiting assembly 6 includes a fixing frame 61, a bolt 62 is threadedly connected to the fixing frame 61, a limiting member 63 is provided at the bottom of the fixing frame 61, a through hole is provided on the limiting member 63, the rope 35 is slidably connected in the through hole, a limiting plate 36 is provided on the side of the clamp 32 near the rope 35, the rope 35 is slidably connected in the limiting groove provided on the limiting plate 36, by providing the limiting assembly 6, the rope 35 is limited during its movement to ensure its stability, and by providing the limiting plate 36, the rope 35 is guided during the process of being retracted to prevent it from falling off the take-up roller 34;

[0036] Furthermore, if Figure 2 As shown: a rotating assembly 2 is provided at the bottom of the column 41, and the rotating assembly 2 includes a connecting plate 21. The top of the connecting plate 21 is rotatably connected to the first driven gear 22. The first driven gear 22 is connected to the bottom of the column 41. A first fixed shaft 24 is provided on the side of the top of the connecting plate 21 close to the first driven gear 22. A first motor 25 is provided on the top of the first fixed shaft 24. A first transmission gear 23 is provided on the first fixed shaft 24. The first transmission gear 23 is meshed and connected with the first driven gear 22. When the first motor 25 is turned on, the first fixed shaft 24 is driven to rotate, and the first fixed shaft 24 drives the first transmission gear 23 to rotate. The first transmission gear 23 drives the first driven gear 22 to rotate, thereby driving the boom 1 to rotate.

[0037] Working principle: Figure 1 - Figure 4As shown, first, the object is lifted by the hanging member 38, and the second motor 31 is turned on to drive the connecting shaft 33 to rotate, and the connecting shaft 33 drives the take-up roller 34 to rotate, and the take-up roller 34 drives the rope 35 to be wound, thereby driving the hanging member 38 to perform lifting and lowering movements. By setting the limit component 6, the rope 35 is limited during its movement to ensure its stability. By setting the limit plate 36, the rope 35 is guided during the process of being wound up to prevent it from falling off the take-up roller 34. Then, the height of the crane arm 1 is adjusted according to the situation, and the third motor 48 is turned on to drive the second fixed shaft 46 to rotate, and the second fixed shaft 46 drives the second transmission gear 47 rotates, the second transmission gear 47 drives the rack 45 and the belt 44 to move, thereby driving the second driven gear 43 to rotate, and the second driven gear 43 drives the screw 42 to rotate, thereby driving the boom 1 to rotate and lift. During the lifting process of the boom 1, the electric telescopic rod 53 can be turned on to support the height adjustment process of the boom 1 to maintain its stability during adjustment. If it is necessary to change the lifting position of the object, the first motor 25 is turned on to drive the first fixed shaft 24 to rotate, and the first fixed shaft 24 drives the first transmission gear 23 to rotate, and the first transmission gear 23 drives the first driven gear 22 to rotate, thereby driving the boom 1 to rotate.

[0038] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments with equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A tower crane height adjustment device, comprising a boom (1), characterized in that: The bottom of the boom (1) is provided with an adjustment assembly (4), and the adjustment assembly (4) includes a column (41), a slot is provided at the top of the column (41), a screw (42) is rotatably connected in the slot at the top of the column (41), the boom (1) is connected to the screw (42) in the slot at the top of the column (41), a second driven gear (43) is connected to the screw (42), and a second driven gear (43) is provided on the side of the column (41) close to the second driven gear (43). A fixed shaft (46), a second transmission gear (47) is provided on the second fixed shaft (46), a belt (44) is sleeved between the second transmission gear (47) and the second driven gear (43), a rack (45) is provided on the side of the belt (44) close to the second driven gear (43), the rack (45) is meshedly connected with the second driven gear (43) and the second transmission gear (47), and a third motor (48) is provided on the second fixed shaft (46).

2. A tower crane height adjustment device according to claim 1, characterized in that: An auxiliary component (5) is provided on the side of the column (41) close to the boom (1), and the auxiliary component (5) includes a first fixed seat (51), a first rotating rod (52) is rotatably connected to the first fixed seat (51), an electric telescopic rod (53) is connected to the first rotating rod (52), and an output end of the electric telescopic rod (53) is connected to a second rotating rod (55). A second fixed seat (54) is provided on the side of the boom (1) close to the second rotating rod (55), the second rotating rod (55) is rotatably connected to the second fixed seat (54), and a screw (56) is threadedly connected to the second fixed seat (54).

3. The height adjustment device for a tower crane according to claim 1, characterized in that: A rotating assembly (2) is provided at the bottom of the column (41), and the rotating assembly (2) includes a connecting plate (21). The top of the connecting plate (21) is rotatably connected to a first driven gear (22), and the first driven gear (22) is connected to the bottom of the column (41). A first fixed shaft (24) is provided on the top of the connecting plate (21) near the first driven gear (22), and a first motor (25) is provided on the top of the first fixed shaft (24). A first transmission gear (23) is provided on the first fixed shaft (24), and the first transmission gear (23) is meshed with the first driven gear (22).

4. The height adjustment device for a tower crane according to claim 1, characterized in that: The lifting arm (1) is provided with a lifting assembly (3), and the lifting assembly (3) includes a second motor (31). A clamping member (32) is provided on the side of the lifting arm (1) close to the second motor (31). A connecting shaft (33) is rotatably connected in the clamping member (32). A take-up roller (34) is connected to the connecting shaft (33). A rope (35) is sleeved on the take-up roller (34). The side of the rope (35) away from the take-up roller (34) is sleeved on a rotating shaft (37). The bottom of the rope (35) is connected to a hanging member (38).

5. The height adjustment device for a tower crane according to claim 4, characterized in that: A limiting assembly (6) is provided on a side of the boom (1) close to the rope (35), and the limiting assembly (6) includes a fixing frame (61), a bolt (62) is threadedly connected to the fixing frame (61), and a limiting member (63) is provided at the bottom of the fixing frame (61), and a through hole is opened on the limiting member (63), and the rope (35) is slidably connected in the through hole.

6. The height adjustment device for a tower crane according to claim 4, characterized in that: A limiting plate (36) is provided on one side of the clamp (32) close to the rope (35), and the rope (35) is slidably connected in a limiting groove provided on the limiting plate (36).

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