Sleeve frame step top plate device for tower crane

Abstract

The utility model discloses a stock step top plate device for a tower crane, which comprises a stock structure, stock step top plate devices, connecting rods and fixing nuts, the stock step top plate devices are arranged on two sides of the stock structure, and the two stock step top plate devices are connected through the connecting rods. The fixing nut is arranged on the sleeve frame step top plate device and connected to a thread at the end of the connecting rod, the sleeve frame step top plate device comprises a top plate and a pin shaft, a connecting lug plate is arranged on the sleeve frame structure, the pin shaft is arranged on the connecting lug plate, and the top plate is rotationally matched with the pin shaft, so that working synchronism of the two top plates can be achieved; and the jacking and descending safety of the sleeve frame is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, in particular to a frame step top plate device for tower cranes. Background Art

[0002] Tower cranes are a type of lifting equipment used in construction, and they play a very important role in transportation. However, when adding standard sections or lowering sections, there is a risk that the lifting claws will fall out of the tower steps, which will cause a tower collapse accident and seriously endanger the personal safety of the operators. At the same time, the overall structure of the lifting claw assembly is relatively complex and heavy, and the frame needs to be fixed manually to ensure stability when it rises and falls, which is very cumbersome. Therefore, it is very inconvenient for workers to operate and reduces the efficiency of adding and reducing sections.

[0003] Therefore, it is particularly necessary to provide a tower crane frame step top plate device which has a simple and reasonable structure, is safe and reliable, is easy to operate, and improves work efficiency to replace the previous old climbing claw assembly. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a frame step top plate device for a tower crane, which can achieve synchronization of the operation of two top plates and improve the safety of the frame jacking and lowering.

[0005] The utility model adopts the following technical solutions:

[0006] A frame step top plate device for a tower crane comprises a frame structure, a frame step top plate device, a connecting rod and a fixing nut. Frame step top plate devices are provided on both sides of the frame structure. The two frame step top plate devices are connected by a connecting rod. The fixing nut is arranged on the frame step top plate device and connected to the thread at the end of the connecting rod. The frame step top plate device comprises a top plate and a pin shaft. A connecting ear plate is provided on the frame structure. The pin shaft is arranged on the connecting ear plate. The top plate is rotatably matched with the pin shaft.

[0007] Preferably, connecting ear plates are provided on both the left and right sides of the pin shaft, and the upper end of the top plate is located between the two connecting ear plates.

[0008] Preferably, the connecting rod comprises a middle rod body and a connecting portion perpendicular to the rod body, and the connecting portion is provided with threads.

[0009] Preferably, the frame step top plate device also includes a locking pin, a chain, a stop round steel and a locking pin placement tube, the locking pin is connected to the mounting ear plate through the chain, the stop round steel is connected to the mounting ear plate, and the locking pin placement tube is connected to the pin shaft.

[0010] Compared with the prior art, the utility model has the following advantages: the utility model provides a frame step top plate device for a tower crane, comprising a frame structure, a frame step top plate device, a connecting rod and a fixing nut; the frame step top plate device comprises a top plate and a pin shaft; a connecting ear plate is provided on the frame structure, the pin shaft is arranged on the connecting ear plate, the top plate rotates and cooperates with the pin shaft, and after the top plate supports the step, the safety of the frame lifting and lowering is guaranteed, thereby ensuring the safety of the tower crane and reducing the threat to personnel life safety; in addition, the connecting rod is fixed to the top plates on both sides with nuts, ensuring that the top plates on both sides work synchronously and improving the reliability of the fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the frame step top plate device for a tower crane.

[0012] Figure 2 It is a side view of the frame step top plate device.

[0013] Figure 3 This is a schematic diagram of the structure of the step top plate.

[0014] Figure 4 Schematic diagram of the connecting rod structure.

[0015] In the figure, there are a frame structure 1, a frame step top plate device 2, a connecting rod 3, a locking pin 4, a chain 5, a mounting ear plate 6, a fixing nut 7, a stop round steel 8, a locking pin placement tube 9, a top plate 10, and a pin shaft 11. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of the technical solution of the utility model, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.

[0017] Example 1

[0018] like Figure 1-4 As shown, a frame step top plate device for a tower crane includes a frame structure 1, a frame step top plate device 2, a connecting rod 3 and a fixing nut 7. Frame step top plate devices 2 are provided on both sides of the frame structure 1. The two frame step top plate devices 2 are connected by a connecting rod 3. The fixing nut 7 is arranged on the frame step top plate device 2 and connected to the thread at the end of the connecting rod 3. The frame step top plate device 2 includes a top plate 10 and a pin 11. A connecting ear plate 6 is provided on the frame structure 1. The pin 11 is arranged on the connecting ear plate 6. The top plate 10 is rotatably matched with the pin 11 to ensure the synchronization of the operation of the two top plates 10.

[0019] Connecting ear plates 6 are provided on both the left and right sides of the pin shaft 11 , and the upper end of the top plate 10 is located between the two connecting ear plates 6 .

[0020] The pin shaft 11 and the top plate 10 are fixedly connected, and the pin shaft 11 is rotatably engaged with the connecting ear plate 6. There are connecting ear plates 6 on both sides of the top plate 10 to prevent the top plate 10 from detaching during movement.

[0021] The connecting rod 3 comprises a middle rod body and a connecting portion perpendicular to the rod body, wherein the connecting portion is provided with threads.

[0022] The frame step top plate device 2 also includes a locking pin 4, a chain 5, a stop round steel 8 and a locking pin placement tube 9. The locking pin 4 is connected to the mounting ear plate 6 through the chain 5, the stop round steel 8 is connected to the mounting ear plate 6, and the locking pin placement tube 9 is connected to the pin shaft 11. When not working, the locking pin 4 is placed in the locking pin placement tube 9.

[0023] When lifting or lowering a section, a worker pushes the connecting rod 3 to rotate the pin 11 to fix the top plate 10 into the groove at the upper end of the standard section step. The operation is simple and the lifting efficiency is accelerated. After the top plate 10 is inserted into the step, the locking pin 4 is inserted into the hole of the pin 11. The stop round steel 8 will jam the locking pin 4 to prevent the pin 11 from continuing to rotate and prevent the top plate from escaping from the tower step, thereby realizing the anti-slip function and ensuring the safe use of the entire device.

[0024] The above are only preferred embodiments of the present invention. The protection scope of the present invention shall be based on the scope defined by the claims. Several improvements and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall also be regarded as the protection scope of the present invention.

Claims

1. A tower crane frame step top plate device, characterized in that: The invention comprises a sleeve frame structure (1), a sleeve step top plate device (2), a connecting rod (3) and a fixing nut (7); the sleeve step top plate device (2) is provided on both sides of the sleeve frame structure (1); the two sleeve step top plate devices (2) are connected via a connecting rod (3); the fixing nut (7) is arranged on the sleeve step top plate device (2) and connected to a thread at the end of the connecting rod (3); the sleeve step top plate device (2) comprises a top plate (10) and a pin shaft (11); a connecting ear plate (6) is provided on the sleeve frame structure (1); the pin shaft (11) is arranged on the connecting ear plate (6); and the top plate (10) is rotatably matched with the pin shaft (11).

2. A tower crane frame step top plate device according to claim 1, characterized in that: Connecting ear plates (6) are provided on both the left and right sides of the pin shaft (11), and the upper end of the top plate (10) is located between the two connecting ear plates (6).

3. The tower crane frame step top plate device according to claim 1, characterized in that: The connecting rod (3) comprises a middle rod body and a connecting portion perpendicular to the rod body, wherein the connecting portion is provided with a thread.

4. A tower crane frame step top plate device according to claim 1, characterized in that: The frame step top plate device (2) also includes a lock pin (4), a chain (5), a stop round steel (8) and a lock pin placement tube (9). The lock pin (4) is connected to the mounting ear plate (6) through the chain (5), the stop round steel (8) is connected to the mounting ear plate (6), and the lock pin placement tube (9) is connected to the pin shaft (11).

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