A tower crane attachment frame adjustment rod

Abstract

This invention discloses an adjusting tie rod for a tower crane attachment frame, relating to the field of attachment frame tie rod technology. The invention includes a first tie rod and a second tie rod. A guide rail is fixedly connected to the middle of the right side of the first tie rod. A coarse adjustment screw is fixedly connected to the right side of the first tie rod. A first screw hole is formed on the right side of the first tie rod, and the first screw hole and the coarse adjustment screw are symmetrically distributed about the guide rail. A fine adjustment nut is rotatably installed on the right side of the first screw hole. A fine adjustment screw is fixedly connected to the left side of the second tie rod. A transmission assembly is internally provided in the guide rail, enabling the fine adjustment nut and the coarse adjustment nut to rotate synchronously at a differential speed. This invention employs a dual-screw adjustment method. Through the transmission assembly, the coarse adjustment nut and the fine adjustment nut can rotate synchronously at a differential speed, thereby allowing for coarse and fine adjustments to the distance between the first and second tie rods, resulting in higher adjustment accuracy and greater convenience.

Description

Technical Field

[0001] The invention relates to the technical field of attachment frame pull rods, and in particular to an adjusting pull rod of an attachment frame of a tower crane. Background Art

[0002] Tower cranes are widely used in construction, especially in the construction of high-rise buildings. Their main function is to lift heavy objects and improve work efficiency. In the structure of a tower crane, the attachment frame is one of the key components. The tower crane attachment frame is mainly used to fix the connection between the tower body and the tower body foundation. At the same time, it also has an adjustment function, which can adjust the height of the tower body according to the needs of different construction stages. The attachment frame is usually composed of a support structure, an adjustment rod, an adjustment screw and other parts. Through the cooperation of these parts, the tower crane can be effectively lifted and adjusted as the project progresses, thereby ensuring the stability and safety of the operation.

[0003] The attachment frame tie rod is used to connect the attachment frame with the wall embedded parts to play a supporting and stabilizing role. In the actual installation process, the distance between the attachment frame and the wall embedded parts is uncertain, so the attachment frame tie rod is required to have a length adjustment function. At present, the attachment frame tie rod adjustment methods mainly include manual thread adjustment and hydraulic adjustment. The initial investment and maintenance costs of the hydraulic system are high, and the sealing and maintenance requirements of the system are high. Therefore, manual thread adjustment is the most commonly used. In a Chinese patent (application number: CN201310409147.1), a tower crane attachment frame adjustment tie rod is disclosed, including a tie rod and an ear plate, and also includes an embedded part; the embedded part includes a universal fixing device, and the tie rod is connected to the universal fixing device through the ear plate. This patent also uses manual thread adjustment and a single threaded rod for adjustment. The adjustment accuracy is limited and the adjustment is difficult. At the same time, in actual use, the tower crane will be subject to vibration while working, especially when lifting heavy objects or operating. Long-term vibration may cause the nut to gradually loosen. Since the adjustment nut is subjected to a large load, it is more likely to loosen. Loosening of the attachment frame adjustment nut will cause a loose connection between the attachment frame and the wall, which may cause the overall structure of the tower crane to shift or become unstable. This instability will increase the risk of the tower crane tilting or unbalancing, and may even cause the tower crane to collapse, resulting in a major safety accident. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problem and provide an adjusting rod for an attachment frame of a tower crane.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] A tower crane attachment frame adjustment rod comprises a first rod and a second rod, wherein a guide rail rod is fixedly connected to the middle of the right side of the first rod, a coarse adjustment screw rod is fixedly connected to the right side of the first rod, a first screw rod hole is opened on the right side of the first rod, the first screw rod hole and the coarse adjustment screw rod are symmetrically distributed with respect to the guide rail rod, and a fine adjustment nut is rotatably installed on the right side of the first screw rod hole;

[0007] A guide rail hole is provided in the middle of the left side of the second tie rod, the guide rail rod is inserted in the guide rail hole, a fine-adjustment screw is fixedly connected to the left side of the second tie rod, a second screw hole is provided on the left side of the second tie rod, the second screw hole and the fine-adjustment screw are symmetrically distributed with respect to the guide rail hole, the coarse-adjustment screw is inserted in the second screw hole, the fine-adjustment screw is inserted in the first screw hole, and a coarse-adjustment nut is rotatably installed on the left side of the second screw hole;

[0008] A transmission assembly is arranged inside the guide rail rod, and the transmission assembly enables the fine adjustment nut and the coarse adjustment nut to rotate synchronously and differentially.

[0009] Furthermore, the transmission assembly includes a slider slidably connected to the inside of the guide rod, a support shaft is rotatably installed inside the slider, a sleeve is provided at the top of the support shaft, a transmission sleeve is rotatably installed inside the sleeve, both ends of the transmission sleeve are slidably connected with a transmission shaft, a universal joint is provided at one end of the transmission shaft away from the transmission sleeve, and two sets of universal joints are respectively transmission-connected to the fine-adjustment nut and the coarse-adjustment nut.

[0010] Furthermore, a fine adjustment driving wheel is fixedly connected to the right side of the fine adjustment nut, a coarse adjustment driving wheel is fixedly connected to the left side of the coarse adjustment nut, a first connecting member is rotatably installed on the outer side of the fine adjustment nut, and a second connecting member is rotatably installed on the outer side of the coarse adjustment nut. A telescopic sleeve is provided at the bottom end of the support shaft, and telescopic connecting rods are inserted at both ends of the telescopic sleeve. The two groups of telescopic connecting rods are respectively hinged to the first connecting member and the second connecting member, a fine adjustment transmission wheel is rotatably installed on the side of the first connecting member away from the first pull rod, and the fine adjustment transmission wheel is meshed with the fine adjustment driving wheel, a coarse adjustment transmission wheel is rotatably installed on the side of the second connecting member away from the second pull rod, and the movable ends of the two groups of universal joints are respectively fixedly connected to the fine adjustment transmission wheel and the coarse adjustment transmission wheel.

[0011] Further, the radius of the fine-adjustment driving wheel is smaller than the radius of the coarse-adjustment driving wheel, and the radius of the fine-adjustment transmission wheel is larger than the radius of the coarse-adjustment transmission wheel.

[0012] Furthermore, a locking thread is provided on the outer side of the support shaft, and an anti-loosening locking nut is threadedly connected to the outer side of the locking thread.

[0013] Furthermore, the anti-loosening locking nut is located above the sliding block, and the lower surface of the anti-loosening locking nut and the upper surface of the sliding block are both friction surfaces.

[0014] Furthermore, a connector is disposed on the left side of the first pull rod and the right side of the second pull rod.

[0015] Furthermore, a transmission protrusion is annularly arranged on the outer side of the transmission sliding shaft, and a transmission groove is annularly opened on the inner wall of the transmission sleeve, and the transmission protrusion is inserted into the transmission groove.

[0016] Furthermore, the coarse adjustment screw and the fine adjustment screw have the same radius, and are both made of No. 45 steel, and are sprayed with an anti-corrosion coating on the surface.

[0017] The beneficial effects of the present invention are as follows:

[0018] The present invention arranges a coarse adjustment screw and a fine adjustment screw between the first pull rod and the second pull rod. The arrangement of the two sets of screws can provide a more stable pulling force and a high connection stability.

[0019] The present invention adopts a double-screw adjustment method. Through the setting of the transmission component, the coarse adjustment nut and the fine adjustment nut can rotate synchronously at differential speeds, thereby making it possible to perform coarse and fine adjustments on the distance between the first pull rod and the second pull rod, with higher adjustment accuracy and convenient adjustment.

[0020] The present invention can prevent the coarse adjustment screw and the fine adjustment screw from loosening by setting the transmission component and utilizing its own structure, thereby ensuring that the coarse adjustment nut and the fine adjustment nut are not prone to loosening during use, and the use safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0023] Figure 3 It is the overall exploded view of the present invention;

[0024] Figure 4 is a schematic diagram of the first pull rod structure of the present invention;

[0025] Figure 5 is a schematic diagram of the second pull rod structure of the present invention;

[0026] Figure 6 It is an exploded view of the transmission assembly of the present invention.

[0027] Figure numerals: 1. first pull rod; 11. coarse adjustment screw; 12. guide rail; 13. first screw hole; 14. fine adjustment nut; 15. fine adjustment drive wheel; 16. first connecting piece; 17. fine adjustment transmission wheel; 2. second pull rod; 21. fine adjustment screw; 22. second screw hole; 23. guide rail hole; 24. coarse adjustment nut; 25. coarse adjustment drive wheel; 26. second connecting piece; 27. coarse adjustment transmission wheel; 3. transmission assembly; 31. slider; 32. support shaft; 33. sleeve; 34. transmission sleeve; 35. telescopic sleeve; 36. transmission slide shaft; 37. universal joint; 38. telescopic connecting rod; 39. anti-loosening locking nut. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Embodiment 1, as Figure 1-Figure 6 As shown, an adjusting rod of a tower crane attachment frame includes a first rod 1 and a second rod 2, a guide rail rod 12 is fixedly connected to the middle of the right side of the first rod 1, a coarse adjustment screw rod 11 is fixedly connected to the right side of the first rod 1, a first screw hole 13 is opened on the right side of the first rod 1, the first screw hole 13 and the coarse adjustment screw 11 are symmetrically distributed about the guide rail rod 12, and a fine adjustment nut 14 is rotatably installed on the right side of the first screw hole 13;

[0030] A guide rail hole 23 is provided in the middle of the left side of the second tie rod 2, the guide rail rod 12 is inserted into the guide rail hole 23, a fine adjustment screw 21 is fixedly connected to the left side of the second tie rod 2, a second screw hole 22 is provided on the left side of the second tie rod 2, the second screw hole 22 and the fine adjustment screw 21 are symmetrically distributed about the guide rail hole 23, the coarse adjustment screw 11 is inserted into the second screw hole 22, the fine adjustment screw 21 is inserted into the first screw hole 13, and a coarse adjustment nut 24 is rotatably installed on the left side of the second screw hole 22;

[0031] A transmission assembly 3 is disposed inside the guide rail rod 12 , and the transmission assembly 3 enables the fine adjustment nut 14 and the coarse adjustment nut 24 to rotate synchronously and differentially.

[0032] When in use, the first pull rod 1 is connected to the attachment frame, and then according to the distance from the embedded part to the attachment frame, the coarse adjustment nut 24 is first rotated with a wrench. The coarse adjustment nut 24 first coarsely adjusts the distance between the second pull rod 2 and the first pull rod 1 through the coarse adjustment screw 11. Through the setting of the transmission component 3, the fine adjustment nut 14 rotates synchronously, and the rotation speed of the fine adjustment nut 14 is higher than that of the coarse adjustment nut 24, ensuring that the coarse adjustment screw 11 and the fine adjustment screw 21 move the same distance. After completing the coarse adjustment, the fine adjustment nut 14 is rotated with a wrench. The fine adjustment nut 14 finely adjusts the distance between the second pull rod 2 and the first pull rod 1 through the fine adjustment screw 21. The adjustment has high accuracy and is convenient. After the adjustment is completed, the second pull rod 2 is connected to the embedded part of the wall.

[0033] The pull rod of the present invention adopts a double-screw adjustment method, which can be used for fine adjustment and coarse adjustment with high adjustment accuracy. At the same time, the double-screw has a stronger load-bearing capacity, and the fine-adjustment nut 14 and the coarse-adjustment nut 24 are transmitted as a whole through the transmission component 3. When the coarse-adjustment nut 24 is slightly loose, the transmission component 3 will amplify the number of rotations of the coarse-adjustment nut 24, thereby increasing the loosening resistance of the coarse-adjustment nut 24. When the fine-adjustment nut 14 is loose, the rotation angle of the coarse-adjustment nut 24 is small, and the overall length of the device changes little, thereby improving the safety of the device.

[0034] Embodiment 2, on the basis of the above embodiment, further includes that the transmission assembly 3 includes a slider 31 slidably connected to the inside of the guide rod 12, a support shaft 32 is rotatably installed inside the slider 31, a sleeve 33 is provided at the top of the support shaft 32, a transmission sleeve 34 is rotatably installed inside the sleeve 33, both ends of the transmission sleeve 34 are slidably connected with a transmission sliding shaft 36, a universal joint 37 is provided at one end of the transmission sliding shaft 36 away from the transmission sleeve 34, and the two sets of universal joints 37 are respectively connected to the fine adjustment nut 14 and the coarse adjustment nut 24 for transmission.

[0035] Furthermore, the right side of the fine-adjustment nut 14 is fixedly connected with a fine-adjustment driving wheel 15, the left side of the coarse-adjustment nut 24 is fixedly connected with a coarse-adjustment driving wheel 25, the outer side of the fine-adjustment nut 14 is rotatably installed with a first connecting member 16, the outer side of the coarse-adjustment nut 24 is rotatably installed with a second connecting member 26, a telescopic sleeve 35 is provided at the bottom end of the support shaft 32, and telescopic connecting rods 38 are inserted at both ends of the telescopic sleeve 35, and the two groups of telescopic connecting rods 38 are respectively hinged to the first connecting member 16 and the second connecting member 26, and the two groups of telescopic connecting rods 38 are respectively hinged to the first connecting member 16 and the second connecting member 26, and the fine-adjustment transmission wheel 17 is rotatably installed on the side of the first connecting member 16 away from the first pull rod 1, and the fine-adjustment transmission wheel 17 is meshed with the fine-adjustment driving wheel 15, and the coarse-adjustment transmission wheel 27 is rotatably installed on the side of the second connecting member 26 away from the second pull rod 2, and the movable ends of the two groups of universal joints 37 are respectively fixedly connected to the fine-adjustment transmission wheel 17 and the coarse-adjustment transmission wheel 27.

[0036] Furthermore, the radius of the fine-adjustment driving wheel 15 is smaller than the radius of the coarse-adjustment driving wheel 25 , and the radius of the fine-adjustment transmission wheel 17 is larger than the radius of the coarse-adjustment transmission wheel 27 .

[0037] During coarse adjustment: use a wrench to rotate the coarse adjustment nut 24, the coarse adjustment nut 24 first coarsely adjusts the distance between the second pull rod 2 and the first pull rod 1 through the coarse adjustment screw 11, and at the same time the coarse adjustment nut 24 drives the coarse adjustment drive wheel 25 to rotate, the coarse adjustment drive wheel 25 drives the coarse adjustment transmission wheel 27 to rotate, the coarse adjustment transmission wheel 27 drives the transmission pulley 36 on the same side to rotate through the universal joint 37 close to the second pull rod 2 side, the transmission pulley 36 close to the second pull rod 2 side drives the transmission sleeve 34 to rotate, the transmission sleeve 34 drives the transmission pulley 36 close to the first pull rod 1 side to rotate, the transmission pulley 36 close to the first pull rod 1 side drives the fine adjustment transmission wheel 17 to rotate through the universal joint 37 on the same side, and the fine adjustment transmission The wheel 17 drives the fine-adjustment driving wheel 15 to rotate, and the fine-adjustment driving wheel 15 drives the fine-adjustment nut 14 to rotate synchronously. Since the radius of the fine-adjustment driving wheel 15 is smaller than the radius of the coarse-adjustment driving wheel 25, and the radius of the fine-adjustment transmission wheel 17 is larger than the radius of the coarse-adjustment transmission wheel 27, the rotation speed of the fine-adjustment nut 14 is higher than the rotation speed of the coarse-adjustment nut 24. By setting the threads of the coarse-adjustment screw 11 and the fine-adjustment screw 21, the meshing ratio of the fine-adjustment driving wheel 15, the coarse-adjustment driving wheel 25, the fine-adjustment transmission wheel 17 and the coarse-adjustment transmission wheel 27 is set, so that the coarse-adjustment screw 11 and the fine-adjustment screw 21 move the same distance, and do not affect each other during coarse and fine adjustments. At the same time, the stability of the speed transmission can be improved by setting two sets of universal joints 37.

[0038] As the distance between the first pull rod 1 and the second pull rod 2 changes, the distance between the fine-adjustment nut 14 and the coarse-adjustment nut 24 increases, and thus the angle between the transmission sleeve 34 and the guide rod 12 changes. Therefore, through the setting of the universal joint 37, transmission can be performed at different angles, and the transmission sliding shaft 36 can slide relative to the transmission sleeve 34 to ensure stable transmission. At the same time, since the slider 31 can slide along the guide rod 12, it is ensured that the support shaft 32 is always located at the center position between the fine-adjustment nut 14 and the coarse-adjustment nut 24.

[0039] The two sets of telescopic links 38 are hinged to the first connecting member 16 and the second connecting member 26, so that the first connecting member 16 and the second connecting member 26 cannot rotate, and a stable supporting force can be provided for the fine adjustment transmission wheel 17 and the coarse adjustment transmission wheel 27, and the telescopic links 38 can be telescoped relative to the telescopic sleeve 35 without affecting the telescopic movement of the transmission slide shaft 36.

[0040] Embodiment 3, based on the above embodiment, further includes that a locking thread is provided on the outer side of the support shaft 32, and an anti-loosening locking nut 39 is threadedly connected to the outer side of the locking thread.

[0041] Furthermore, the anti-loosening locking nut 39 is located above the slider 31 , and the lower surface of the anti-loosening locking nut 39 and the upper surface of the slider 31 are both friction surfaces.

[0042] As the distance between the first pull rod 1 and the second pull rod 2 changes, the distance between the fine-adjustment nut 14 and the coarse-adjustment nut 24 increases, and thus the angle between the transmission sleeve 34 and the guide rod 12 changes. The loosening of the fine-adjustment nut 14 and the coarse-adjustment nut 24 will change the angle of the transmission sleeve 34. Therefore, based on this structural characteristic, after the adjustment is completed, the anti-loosening locking nut 39 is tightened on the slider 31, and the support shaft 32 is locked on the slider 31, thereby limiting the change in the angle of the transmission sleeve 34, thereby limiting the loosening of the fine-adjustment nut 14 and the coarse-adjustment nut 24, and a smaller anti-loosening locking nut 39 can be used to achieve this. Compared with the common method of setting two large-sized anti-loosening nuts on the coarse-adjustment screw 11 and the fine-adjustment screw 21, the cost is extremely low. At the same time, during normal use, the support shaft 32 does not need to bear a large load, so the anti-loosening locking nut 39 is less likely to loosen and has higher stability.

[0043] Embodiment 4, based on the above embodiment, further includes that a connector is provided on the left side of the first pull rod 1 and the right side of the second pull rod 2 for easy connection.

[0044] Embodiment 5, based on the above embodiment, further includes that a transmission protrusion is provided in an annular shape on the outer side of the transmission slide shaft 36, and a transmission groove is provided in an annular shape on the inner wall of the transmission sleeve 34, and the transmission protrusion is inserted in the transmission groove, so that the transmission is more stable.

[0045] Embodiment 6, based on the above embodiment, further includes that the radius of the coarse adjustment screw 11 and the fine adjustment screw 21 are the same, and both are made of 45 steel, and the surface is sprayed with an anti-corrosion coating.

[0046] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tower crane attachment frame adjustment rod, comprising a first rod (1) and a second rod (2), characterized in that: A guide rail rod (12) is fixedly connected to the middle of the right side of the first pull rod (1), a coarse adjustment screw rod (11) is fixedly connected to the right side of the first pull rod (1), a first screw rod hole (13) is opened on the right side of the first pull rod (1), the first screw rod hole (13) and the coarse adjustment screw rod (11) are symmetrically distributed with respect to the guide rail rod (12), and a fine adjustment nut (14) is rotatably installed on the right side of the first screw rod hole (13); A guide rail hole (23) is provided in the middle of the left side of the second tie rod (2), the guide rail rod (12) is inserted into the guide rail hole (23), a fine adjustment screw rod (21) is fixedly connected to the left side of the second tie rod (2), a second screw hole (22) is provided on the left side of the second tie rod (2), the second screw hole (22) and the fine adjustment screw rod (21) are symmetrically distributed with respect to the guide rail hole (23), the coarse adjustment screw rod (11) is inserted into the second screw hole (22), the fine adjustment screw rod (21) is inserted into the first screw hole (13), and a coarse adjustment nut (24) is rotatably installed on the left side of the second screw hole (22); A transmission assembly (3) is arranged inside the guide rail rod (12), and the transmission assembly (3) enables the fine adjustment nut (14) and the coarse adjustment nut (24) to rotate synchronously and differentially.

2. The tower crane attachment frame adjusting rod according to claim 1, characterized in that: The transmission assembly (3) comprises a slider (31) slidably connected to the inside of the guide rail rod (12); a support shaft (32) is rotatably mounted inside the slider (31); a sleeve (33) is arranged at the top end of the support shaft (32); a transmission sleeve (34) is rotatably mounted inside the sleeve (33); both ends of the transmission sleeve (34) are slidably connected to a transmission sliding shaft (36); a universal joint (37) is arranged at one end of the transmission sliding shaft (36) away from the transmission sleeve (34); and two sets of universal joints (37) are respectively transmission-connected to the fine adjustment nut (14) and the coarse adjustment nut (24).

3. The tower crane attachment frame adjusting rod according to claim 2, characterized in that: The right side of the fine adjustment nut (14) is fixedly connected to a fine adjustment driving wheel (15), the left side of the coarse adjustment nut (24) is fixedly connected to a coarse adjustment driving wheel (25), the outer side of the fine adjustment nut (14) is rotatably mounted with a first connecting member (16), the outer side of the coarse adjustment nut (24) is rotatably mounted with a second connecting member (26), the bottom end of the support shaft (32) is provided with a telescopic sleeve (35), both ends of the telescopic sleeve (35) are plugged with telescopic connecting rods (38), and the two sets of telescopic connecting rods (38) are connected to the support shaft (32). 8) are respectively hinged to the first connecting member (16) and the second connecting member (26); a fine adjustment transmission wheel (17) is rotatably mounted on the side of the first connecting member (16) away from the first pull rod (1), and the fine adjustment transmission wheel (17) is meshed with the fine adjustment drive wheel (15); a coarse adjustment transmission wheel (27) is rotatably mounted on the side of the second connecting member (26) away from the second pull rod (2); and the movable ends of the two sets of universal joints (37) are respectively fixedly connected to the fine adjustment transmission wheel (17) and the coarse adjustment transmission wheel (27).

4. The tower crane attachment frame adjusting rod according to claim 3, characterized in that: The radius of the fine adjustment driving wheel (15) is smaller than the radius of the coarse adjustment driving wheel (25), and the radius of the fine adjustment transmission wheel (17) is larger than the radius of the coarse adjustment transmission wheel (27).

5. The tower crane attachment frame adjusting rod according to claim 4, characterized in that: The outer side of the support shaft (32) is provided with a locking thread, and the outer side of the locking thread is threadedly connected to an anti-loosening locking nut (39).

6. The tower crane attachment frame adjusting rod according to claim 5, characterized in that: The anti-loosening locking nut (39) is located above the sliding block (31), and the lower surface of the anti-loosening locking nut (39) and the upper surface of the sliding block (31) are both friction surfaces.

7. The tower crane attachment frame adjusting rod according to claim 1, characterized in that: Connectors are provided on the left side of the first pull rod (1) and the right side of the second pull rod (2).

8. The tower crane attachment frame adjusting rod according to claim 2, characterized in that: The outer side of the transmission sliding shaft (36) is provided with a transmission protrusion in an annular shape, and the inner wall of the transmission sleeve (34) is provided with a transmission groove in an annular shape, and the transmission protrusion is inserted into the transmission groove.

9. The tower crane attachment frame adjusting rod according to claim 1, characterized in that: The coarse adjustment screw (11) and the fine adjustment screw (21) have the same radius and are both made of No. 45 steel, with an anti-corrosion coating sprayed on their surfaces.

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