Protective device for crane construction

Abstract

The utility model discloses a protective device for crane construction, which comprises a pulley, two ends of the pulley are provided with a trapezoidal shell through a rotating shaft, two ends of the bottom of the trapezoidal shell are respectively hinged with a first support rod, one end of the bottom of each first support rod is hinged with a connecting cylinder, and a threaded rod is arranged in the connecting cylinder through a bearing. The adjacent ends of the two threaded rods are in threaded connection with internal threaded cylinders, the directions of thread lines of the two threaded rods are opposite, and the directions of internal thread lines of the internal threaded cylinders are matched with the directions of the thread lines of the two threaded rods; according to the utility model, a stable triangular supporting structure for hoisting of the crane is formed among the trapezoidal shell, the first supporting rod and the threaded rod, the first supporting rod can swing outwards or inwards when the threaded rod rotates, the hoisting distance of the steel rope is flexibly adjusted, and meanwhile, the second supporting rod can move up and down in the pipe body, so that the stability of the triangular supporting structure is further improved.

Description

Technical Field

[0001] This utility model relates to the field of lifting protection technology, specifically to a protective device for crane construction. Background Technology

[0002] Crane safety devices are a critical system for ensuring safety during high-altitude operations. They mainly include torque limiters, height limiters, and travel limiters, which can monitor the load weight, lifting height, and travel radius in real time, effectively preventing overloading, collisions, and overturning accidents. Like the crane's "intelligent safety brain," they automatically warn of or shut down dangerous operations, creating a vital safety barrier for personnel, equipment, and the surrounding environment at the construction site, making them an indispensable safety guarantee in modern construction.

[0003] The existing crane lifting devices mostly use a single lifting pulley combined with a steel cable design. The lateral distance of the bottom support points cannot be flexibly adjusted according to the width or length of the object to be lifted. When lifting objects such as plates with large differences in width or components of different lengths, it is necessary to replace the entire set of lifting fixtures or add additional matching accessories. This not only increases the equipment investment cost but also prolongs the preparation time. Furthermore, the large sway of the steel cable can cause the object to be lifted to shift, and may even pose a safety hazard. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] Therefore, one objective of this utility model is to provide a protective device for crane construction. This protective device can make the first support rod swing outward or inward by rotating the threaded rod, flexibly adjusting the spacing of the steel cable lifting. At the same time, the trapezoidal shell, the first support rod and the threaded rod form a stable triangular support structure for crane lifting.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a protective device for crane construction, comprising a pulley, with trapezoidal housings mounted on both ends of the pulley via rotating shafts, and first support rods hinged to both bottom ends of the trapezoidal housings, with a connecting cylinder hinged to one bottom end of each first support rod, and threaded rods mounted inside the connecting cylinder via bearings, with an internal threaded cylinder threaded to one adjacent end of each of the two threaded rods, the threads of the two threaded rods being in opposite directions, and the internal thread of the internal threaded cylinder matching the thread direction of the two threaded rods, and a sleeve mounted on the outer wall of the internal threaded cylinder via bearings.

[0007] Preferably, a second support rod is fixedly connected to the bottom of the trapezoidal shell, a tube is fixedly connected to the outer wall of the sleeve, one bottom end of the second support rod is slidably installed inside the tube, and a spring is fixedly connected to one bottom end of the second support rod.

[0008] Preferably, a steel cable is installed inside the pulley, and a hook is installed on the top of the pulley.

[0009] Preferably, a plurality of guide wheels are installed at equal intervals on the outer wall of the first support rod, and the steel cable is attached to the outer wall of the guide wheels.

[0010] Preferably, a connecting ring is installed at the end of the steel cable.

[0011] Preferably, a limit ring is fixedly connected to one end of the top of the tube.

[0012] Preferably, the outer wall of the internally threaded cylinder is provided with anti-slip texture.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, a stable triangular support structure for crane lifting is formed between the trapezoidal shell, the first support rod and the threaded rod, and the first support rod can swing outward or inward when the threaded rod rotates, so as to flexibly adjust the spacing of the steel cable lifting. At the same time, the second support rod can move up and down in the tube, further improving the stability of the triangular support structure and reducing the swaying amplitude of the first support rod and the threaded rod. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the protective device for crane construction according to an embodiment of the present utility model;

[0015] Figure 2 This is a side view of the pulley structure in the crane construction safety device according to an embodiment of the present utility model;

[0016] Figure 3 This is an embodiment of the present utility model. Figure 1 A magnified structural diagram of part A in the middle;

[0017] Figure 4 This is a cross-sectional structural diagram of the internally threaded cylinder in the crane construction protective device according to an embodiment of this utility model.

[0018] In the diagram: 1. Trapezoidal shell; 2. First support rod; 3. Threaded rod; 4. Internally threaded cylinder; 5. Sleeve; 6. Tube body; 7. Second support rod; 8. Guide wheel; 9. Connecting ring; 10. Pulley; 11. Steel cable; 12. Hook; 13. Spring; 14. Limiting ring; 15. Anti-slip texture; 16. Connecting cylinder. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 An embodiment of this utility model provides a protective device for crane construction, including: pulley 10.

[0021] Among them, such as Figure 1 and Figure 2 As shown, trapezoidal housings 1 are mounted on both ends of pulley 10 via pivots. A steel cable 11 is installed inside pulley 10. A hook 12 is installed on the top of pulley 10. The hook 12 is used to connect to the crane lifting mechanism and provide a suspension fulcrum for the entire device. A connecting ring 9 is installed at the end of the steel cable 11. The connecting ring 9 provides a convenient and secure connection point between the steel cable 11 and the object to be lifted. The lifting point of the object to be lifted can be quickly connected through components such as hooks and ropes.

[0022] In this embodiment, as Figures 1-4 As shown, the bottom ends of the trapezoidal shell 1 are both hinged with a first support rod 2. The bottom end of the first support rod 2 is hinged with a connecting cylinder 16. The inside of the connecting cylinder 16 is fitted with a threaded rod 3 through a bearing. The adjacent ends of the two threaded rods 3 are threadedly connected to an internal threaded cylinder 4. The threads of the two threaded rods 3 are in opposite directions, and the internal thread of the internal threaded cylinder 4 matches the thread direction of the two threaded rods 3. The outer wall of the internal threaded cylinder 4 is fitted with a sleeve 5 through a bearing.

[0023] When the internal threaded cylinder 4 is rotated, since the threads of the two threaded rods 3 are in opposite directions and matched with the internal threaded cylinder 4, the two will move synchronously towards each other or synchronously in opposite directions. The threaded rods 3 drive the connecting cylinder 16 at their ends to move, thereby pushing the two first support rods 2 to swing outward or inward, changing the lateral distance of their bottom support points, flexibly adjusting the lifting spacing of the steel cable 11, adapting to objects of different widths or lengths to be lifted, and forming a stable triangular support structure for crane lifting between the trapezoidal shell 1, the first support rods 2 and the threaded rods 3.

[0024] It should be noted that the outer wall of the internal threaded cylinder 4 is provided with anti-slip texture 15. The anti-slip texture 15 increases the friction between the operator's hand and the outer wall of the internal threaded cylinder 4, making it easier to apply force when rotating the internal threaded cylinder 4 to adjust the spacing of the threaded rod 3.

[0025] Reference Figure 1 and Figure 3The bottom of the trapezoidal shell 1 is fixedly connected to a second support rod 7, and the outer wall of the sleeve 5 is fixedly connected to a tube 6. One bottom end of the second support rod 7 is slidably installed inside the tube 6, and one bottom end of the second support rod 7 is fixedly connected to a spring 13. When the first support rod 2 swings, the second support rod 7 slides up and down inside the tube 6, and the spring 13 continuously compresses the second support rod 7, providing a restoring force between the tube 6 and the second support rod 7 to maintain the dynamic balance of the structure.

[0026] Furthermore, multiple guide wheels 8 are installed at equal intervals on the outer wall of the first support rod 2. The steel cable 11 is attached to the outer wall of the guide wheel 8. The guide wheel 8 provides support and guidance for the steel cable 11, avoiding direct friction between the steel cable 11 and the first support rod 2, which would cause wear. Moreover, the equal distribution of multiple guide wheels 8 can evenly disperse the tension of the steel cable 11, reducing excessive local stress.

[0027] like Figure 3 As shown, a limiting ring 14 is fixedly connected to one end of the top of the tube body 6. The limiting ring 14 can limit the sliding stroke of the second support rod 7 in the tube body 6 and prevent the second support rod 7 from detaching from the tube body 6 due to excessive sliding.

[0028] Based on the above technical solution, the working steps of this solution are summarized as follows: When the operator rotates the internal threaded cylinder 4, since the thread lines of the two threaded rods 3 are opposite in direction and matched with the internal threaded cylinder 4, the two will move synchronously towards each other or synchronously in opposite directions. The threaded rods 3 drive the connecting cylinder 16 at their ends to move, thereby pushing the two first support rods 2 to swing outward or inward, changing the lateral distance of their bottom support points, flexibly adjusting the lifting spacing of the steel cable 11, adapting to objects of different widths or lengths to be lifted, and forming a stable triangular support structure for crane lifting between the trapezoidal shell 1, the first support rods 2 and the threaded rods 3.

[0029] Meanwhile, when the first support rod 2 swings outward or inward, the tube body 6 can move up and down, and the bottom of the second support rod 7 slides inside the tube body 6, further improving the stability of the triangular support structure and reducing the swaying amplitude of the first support rod 2 and the threaded rod 3.

[0030] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective device for crane construction, characterized in that, Including pulleys (10): The pulley (10) has a trapezoidal housing (1) mounted on both ends of the pulley (10) via a rotating shaft. The bottom ends of the trapezoidal housing (1) are hinged with a first support rod (2). The bottom end of the first support rod (2) is hinged with a connecting cylinder (16). The connecting cylinder (16) has a threaded rod (3) mounted inside via a bearing. The adjacent ends of the two threaded rods (3) are threadedly connected to an internal threaded cylinder (4). The thread directions of the two threaded rods (3) are opposite, and the internal thread of the internal threaded cylinder (4) matches the thread direction of the two threaded rods (3). The outer wall of the internal threaded cylinder (4) is fitted with a sleeve (5) via a bearing.

2. The protective device for crane construction according to claim 1, characterized in that: The bottom of the trapezoidal shell (1) is fixedly connected to a second support rod (7), the outer wall of the sleeve (5) is fixedly connected to a tube body (6), one bottom end of the second support rod (7) is slidably installed inside the tube body (6), and one bottom end of the second support rod (7) is fixedly connected to a spring (13).

3. The protective device for crane construction according to claim 1, characterized in that: A steel cable (11) is installed inside the pulley (10), and a hook (12) is installed on the top of the pulley (10).

4. The protective device for crane construction according to claim 3, characterized in that: Multiple guide wheels (8) are installed at equal intervals on the outer wall of the first support rod (2), and the steel cable (11) is attached to the outer wall of the guide wheel (8).

5. The protective device for crane construction according to claim 3, characterized in that: The end of the steel cable (11) is fitted with a connecting ring (9).

6. The protective device for crane construction according to claim 2, characterized in that: A limit ring (14) is fixedly connected to one end of the top of the tube (6).

7. The protective device for crane construction according to claim 1, characterized in that: The outer wall of the internally threaded cylinder (4) is provided with anti-slip texture (15).

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