Tower crane safety arm end joint

Abstract

The utility model discloses a tower crane safety arm end joint, and particularly relates to the technical field of tower cranes, the tower crane safety arm end joint comprises a main frame rectangular frame, the upper surface of the main frame rectangular frame is fixedly connected with a lifting frame, a support frame body is arranged in the lifting frame, and a double-sided locking assembly is arranged on the support frame body in a penetrating manner; the double-face locking assembly comprises a locking screw arranged at the top end of the supporting frame body in a penetrating mode, and a safety rope limiting column is connected to the position, located at the circle center point of the locking screw, of the top end of the locking screw. According to the utility model, through the arrangement of the double-sided locking assembly, the safety rope is locked in the gap between the safety rope limiting column and the embedded crimping pillar, and the adjusting screw rod and the locking screw rod are in threaded connection, so that the safety rope can be limited and bound at the position between the safety rope limiting column and the embedded crimping pillar, and the safety rope does not fall off even if the safety rope moves upwards; the safety arm end joint of the tower crane is better in use safety.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, and more specifically, to a safety arm end section of a tower crane. Background Art

[0002] The safety arm end section of a tower crane refers to an important structural component of the tower crane arm. It is used to connect the main arm and the auxiliary arm of the tower crane, enabling the tower crane to maintain balance and stability during operation. The safety arm end section is usually made of high-strength steel.

[0003] After retrieval in the existing publicly available literature, the utility model patent with the Chinese patent publication number CN218174489U discloses an arm end section of a tower crane. For the arm head section, a tie rod with a fixed length is adopted. When the length of the lifting arm is increased or decreased, the height of the lifting arm will change, and the tie rod of the arm head section needs to be adjusted on the premise of ensuring that the triangular fixed structure is not damaged; by leaving enough distance between the trolley idler and the anti-twist device of the arm end section, the trolley can travel to the limit position without colliding with the anti-twist device. The addition of the tie rod will make the whole structure more solid, and the tie rod is a telescopic tie rod. After the lifting arm is reduced in length, the height of the lifting arm increases, and the telescopic tie rod can still be fixed with the support rod and the lifting arm in a triangular structure; however, the tower crane arm end section still has the following defects;

[0004] When personnel repair and move on the tower crane arm end section, they need to wear a safety rope body. Since the safety rope is usually hung at a designated position, it is difficult to lock and limit the safety rope, which is extremely likely to cause the safety rope to fall off from the hanging position. Therefore, the safety during the repair and use of the tower crane arm end section is poor. Summary of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a safety arm end section of a tower crane.

[0006] A safety arm end section of a tower crane includes a main frame rectangular frame. The upper surface of the main frame rectangular frame is fixedly connected with a lifting frame. A support frame body is installed inside the lifting frame, and a double-sided locking assembly is arranged through the support frame body;

[0007] The double-sided locking assembly includes a locking screw rod arranged through the top end of the support frame body. The top end of the locking screw rod and at its center point position is connected with a safety rope limiting column. An adjusting screw rod is rotatably connected inside the safety rope limiting column. A threaded sleeve ring block is threadedly connected to the outer wall of the adjusting screw rod and near its top end position. A socket buckle is rotatably connected to the outer wall of the adjusting screw rod and near the position of the safety rope limiting column. An embedded pressing support column passing through the socket buckle is arranged inside the threaded sleeve ring block and near the outer side of the adjusting screw rod.

[0008] Preferably, the locking screw is fixedly connected between the safety rope limiting post and the support frame body. The cross-sectional diameter of the bottom end of the safety rope limiting post is larger than that of the top end of the locking screw. The threaded sleeve ring block is fixedly connected with the embedded pressing post. The outer walls of the embedded pressing post and the safety rope limiting post are both polished. A locking nut for vertically pressing the support frame body is threadedly connected to the outer wall of the locking screw near its bottom end. A luffing rope wheel connecting plate is welded to one side of the main frame rectangular frame. The luffing rope wheel connecting plate and the main frame rectangular frame are both made of stainless steel. An obstacle lamp base is fixedly connected to the top end of the support frame body and located on one side of the outer wall. A docking pipe body is welded to the other side of the main frame rectangular frame. Two tread plates are welded at equal intervals from left to right on the inner wall of the docking pipe body, and two symmetrically arranged anti-collision blocks are welded to one side of the docking pipe body.

[0009] By adopting the above technical solution, a lamp holder is installed on the obstacle lamp base, which is convenient for the lampshade to be placed at the designated position and provides the lighting condition at the eccentric wheel position. The maintenance personnel place the safety rope at the right side position of the outer wall of the safety rope limiting post, rotate the adjusting screw to rotate inside the socket buckle. The adjusting screw drives the threaded sleeve ring block to move downward under the action of the thread. The threaded sleeve ring block drives the embedded pressing post to move downward along the guide inside the socket buckle. The bottom end of the embedded pressing post presses against the bottom end position of the inner wall of the safety rope limiting post. The safety rope is locked in the gap between the safety rope limiting post and the embedded pressing post. And by rotating the adjusting screw, the adjusting screw is threadedly connected with the locking screw, and the top end of the locking nut presses against the bottom end position of the support frame body, increasing the stability of the support frame body. In this way, the safety rope can be limited and constrained between the safety rope limiting post and the embedded pressing post and firmly locked on the outer wall of the safety rope limiting post, and even if the safety rope moves upward, it will not fall off.

[0010] Preferably, an eccentric wheel is rotatably connected to the inner wall of the support frame body near its bottom end. A handle is fixedly connected to the top end of the eccentric wheel. A connecting wheel shaft is inserted and fixed inside the eccentric wheel. Support blocks are rotatably connected to both sides of the outer wall of the connecting wheel shaft. A bottom block is welded to the bottom end of the support block.

[0011] By adopting the above technical solution, the bottom block plays a supporting role for the support block, and the support block plays a supporting role for the connecting wheel shaft. The hand holds the handle to prevent the eccentric wheel from moving. The steel rope is placed at the outer wall position of the eccentric wheel for guiding movement.

[0012] The technical effects and advantages of the present utility model:

[0013] 1. By setting a double-sided locking assembly, the safety rope is locked in the gap between the safety rope limiting post and the embedded crimping post. And by rotating the adjusting screw, which is threadedly connected to the locking screw, the safety rope can be limited and constrained at the position between the safety rope limiting post and the embedded crimping post, and firmly locked on the outer wall of the safety rope limiting post. The safety rope will not fall off even if it moves upward, making the use of the end section of the safety arm of the tower crane safer;

[0014] 2. The bottom block supports the support block, and the support block supports the connecting wheel shaft. The steel rope is placed at the outer wall position of the eccentric wheel for guiding movement, which can limit and install the steel rope and increase the stability of the connection between the eccentric wheel and the steel rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic top plan view of the end section of the safety arm of a tower crane provided by the present utility model.

[0016] Figure 2 FIG. is a schematic side plan view of the connection between the lifting frame and the support frame body in the end section of the safety arm of a tower crane of the present utility model.

[0017] Figure 3 FIG. is a schematic structural view of the double-sided locking assembly in the end section of the safety arm of a tower crane of the present utility model.

[0018] Figure 4 FIG. is a schematic partial plan view of the connection between the eccentric wheel and the handle in the end section of the safety arm of a tower crane of the present utility model.

[0019] The reference numerals are: 1, main frame rectangular frame; 2, lifting frame; 3, support frame body; 4, locking screw; 5, safety rope limiting post; 6, socket buckle; 7, adjusting screw; 8, threaded sleeve ring block; 9, embedded crimping post; 10, locking nut; 11, luffing rope wheel connecting plate; 12, obstacle lamp base; 13, docking pipe body; 14, checkered plate; 15, anti-collision block; 16, eccentric wheel; 17, handle; 18, connecting wheel shaft; 19, support block; 20, bottom block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] As shown in the atta Figures 1-4A safety arm end section of a tower crane is shown. A double-sided locking assembly is provided on the safety arm end section of the tower crane. The double-sided locking assembly can limit and lock the safety rope in the gap between the safety rope limiting post 5 and the embedded crimping post 9. By rotating the adjusting screw 7, which is threadedly connected to the locking screw 4, the safety rope can be limited and constrained at the position between the safety rope limiting post 5 and the embedded crimping post 9 and firmly locked on the outer wall of the safety rope limiting post 5. The safety rope will not fall off even if it moves upward, making the use of the safety arm end section of the tower crane safer. The specific structure of the double-sided locking assembly is as follows:

[0022] In some embodiments, as shown in the appendix Figures 1-3 The double-sided locking assembly includes a locking screw 4 penetrating through the top end of the support frame body 3. At the top end of the locking screw 4 and at its center point position, a safety rope limiting post 5 is connected. Inside the safety rope limiting post 5, an adjusting screw 7 is rotatably connected. At a position near the top end of the outer wall of the adjusting screw 7, a threaded sleeve ring block 8 is threadedly connected. At a position near the safety rope limiting post 5 on the outer wall of the adjusting screw 7, a socket buckle 6 is rotatably connected. Inside the threaded sleeve ring block 8 and at a position near the outer side of the adjusting screw 7, an embedded crimping post 9 penetrating through the socket buckle 6 is provided;

[0023] The working principle of the safety arm end section of the tower crane in this embodiment: Install a lamp holder on the obstacle lamp base 12 to facilitate placing the lamp shade at the designated position and provide the lighting condition at the position of the eccentric wheel 16. The maintenance personnel place the safety rope at the right side position on the outer wall of the safety rope limiting post 5 and rotate the adjusting screw 7 to rotate inside the socket buckle 6. The adjusting screw 7 drives the threaded sleeve ring block 8 to move downward under the action of the thread. The threaded sleeve ring block 8 drives the embedded crimping post 9 to move downward along the guide inside the socket buckle 6. The bottom end of the embedded crimping post 9 presses against the bottom end position on the inner wall of the safety rope limiting post 5. The safety rope is limited and locked in the gap between the safety rope limiting post 5 and the embedded crimping post 9. By rotating the adjusting screw 7, which is threadedly connected to the locking screw 4, the top end of the locking nut 10 presses against the bottom end position of the support frame body 3 to increase the stability of the support frame body 3. In this way, the safety rope can be limited and constrained at the position between the safety rope limiting post 5 and the embedded crimping post 9 and firmly locked on the outer wall of the safety rope limiting post 5. Even if the safety rope moves upward, it will not fall off. Fix the docking pipe body 13 on the tower crane arm so that the anti-collision block 15 can press against the side position of the tower crane arm to avoid collision on one side of the docking pipe body 13. Personnel can step on the upper surface position of the checkered plate 14. By lifting the upper frame 2, the support frame body 3 is fixed, and the luffing rope wheel connecting plate 11 installs the luffing rope assembly to increase the stability of the luffing rope wheel.

[0024] In some embodiments, as shown in the appendix Figures 2-3As shown in the figure, a locking nut 10 for vertically pressing the support frame 3 is threadedly connected to the outer wall of the locking screw 4 near its bottom end. By rotating the locking nut 10, the locking nut 10 is threadedly connected to the locking screw 4, and the top end of the locking nut 10 presses against the bottom end of the support frame 3. On one side of the main frame rectangular frame 1, a luffing rope wheel connecting plate 11 is welded. Both the luffing rope wheel connecting plate 11 and the main frame rectangular frame 1 are made of stainless steel. At the top end of the support frame 3 and on one side of the outer wall, an obstacle lamp base 12 is fixedly connected to facilitate the installation of the luffing rope assembly on the luffing rope wheel connecting plate 11. A lamp base is installed on the obstacle lamp base 12 to conveniently place the lamp shade at the designated position, providing the lighting condition at the position of the eccentric wheel 16. On the other side of the main frame rectangular frame 1, a docking pipe body 13 is welded. Inside the docking pipe body 13, two corrugated plates 14 are welded at equal intervals from left to right. On one side of the docking pipe body 13, two symmetrically arranged anti-collision blocks 15 are welded to facilitate the docking pipe body 13 to be fixed on the safety arm of the tower crane, so that the anti-collision blocks 15 can press against the side position of the safety arm of the tower crane, preventing collision on one side of the docking pipe body 13. Personnel can step on the upper surface of the corrugated plate 14, and the support frame 3 is fixed by lifting the frame 2.

[0025] In some embodiments, as shown in the appendix Figures 2-4 As shown in the figure, an eccentric wheel 16 is rotatably connected to the inner wall of the support frame 3 near its bottom end. A handle 17 is fixedly connected to the top end of the eccentric wheel 16. A connecting wheel shaft 18 is inserted and fixed inside the eccentric wheel 16. On both sides of the eccentric wheel 16 on the outer wall of the connecting wheel shaft 18, support blocks 19 are rotatably connected. The bottom end of the support block 19 is welded with a bottom block 20.

[0026] According to the above structure, when connecting the steel rope, the bottom block 20 supports the support block 19, the support block 19 supports the connecting wheel shaft 18. Hold the handle 17 with the hand to prevent the eccentric wheel 16 from moving. Place the steel rope at the position of the outer wall of the eccentric wheel 16 for guiding movement, which can play a role in limiting the installation of the steel rope. At the same time, both sides can support the connecting wheel shaft 18.

[0027] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safety end section for the boom of a tower crane, comprising a main frame rectangular frame (1), wherein an upper lifting frame (2) is fixedly connected to the upper surface of the main frame rectangular frame (1), and a support frame body (3) is installed inside the upper lifting frame (2), characterized in that: A double-sided locking assembly is provided through the support frame body (3). The double-sided locking assembly includes a locking screw rod (4) provided through the top end of the support frame body (3). At the top end of the locking screw rod (4) and at its center point position, a safety rope limiting post (5) is connected. Inside the safety rope limiting post (5), an adjusting screw rod (7) is rotatably connected. On the outer wall of the adjusting screw rod (7) and near its top end position, a threaded sleeve ring block (8) is threadedly connected. On the outer wall of the adjusting screw rod (7) and near the position of the safety rope limiting post (5), a socket buckle (6) is rotatably connected. Inside the threaded sleeve ring block (8) and near the outer side of the adjusting screw rod (7), an embedded pressing support pillar (9) passing through the socket buckle (6) is provided.

2. The safety arm end section of a tower crane according to claim 1, characterized in that: The locking screw rod (4) is fixedly connected between the safety rope limiting post (5) and the support frame body (3). The cross-sectional diameter of the bottom end of the safety rope limiting post (5) is larger than the cross-sectional diameter of the top end of the locking screw rod (4).

3. The safety arm end section of a tower crane according to claim 1, wherein: The threaded sleeve ring block (8) is fixedly connected to the embedded pressing support pillar (9). The outer walls of the embedded pressing support pillar (9) and the safety rope limiting post (5) are both polished.

4. A safety arm end section of a tower crane according to claim 1, characterized in that: On the outer wall of the locking screw rod (4) and near its bottom end position, a locking nut (10) for vertically pressing the support frame body (3) is threadedly connected.

5. A safety arm end section of a tower crane according to claim 1, characterized in that: On one side of the main frame rectangular frame (1), a luffing rope wheel connecting plate (11) is welded. Both the luffing rope wheel connecting plate (11) and the main frame rectangular frame (1) are made of stainless steel. At the top end of the support frame body (3) and on the outer wall on one side position, an obstacle lamp base (12) is fixedly connected.

6. The end section of the safety arm of a tower crane according to claim 1, characterized in that: On the other side of the main frame rectangular frame (1), a docking pipe body (13) is welded. Inside the inner wall of the docking pipe body (13), two pattern plates (14) are welded equidistantly from left to right. And on one side of the docking pipe body (13), two symmetrically arranged anti-collision blocks (15) are welded.

7. The end section of the safety arm of a tower crane according to claim 1, characterized in that: Inside the inner wall of the support frame body (3) and near its bottom end position, an eccentric wheel (16) is rotatably connected. At the top end of the eccentric wheel (16), a handle (17) is fixedly connected. Inside the eccentric wheel (16), a connecting wheel shaft (18) is inserted and fixed. On the outer wall of the connecting wheel shaft (18) and on both sides of the eccentric wheel (16), support blocks (19) are rotatably connected. At the bottom end of the support block (19), a bottom block (20) is welded.

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