Triangular safety hook capable of automatically extending and retracting

Abstract

The invention relates to the field of lifting appliances, and discloses an automatically telescopic triangular safety lifting hook which comprises a center rod, a slide way, a lifting hook body and supporting rods, a plurality of supporting rods are installed at the other end of the center rod, the supporting rods are rotationally connected with the center rod, the center rod is sleeved with a sliding block capable of sliding along the center rod, and the sliding block is connected with the lifting hook body in a sliding mode. A plurality of force bearing rods are installed on the sliding block, one end of each force bearing rod is rotationally connected with the sliding block, the side faces of the force bearing rods are connected with the supporting rods in a one-to-one correspondence mode, sliding ways are arranged on the force bearing rods, and the ends of the supporting rods are limited in the sliding ways. The lifting appliance can be used for lifting various cavity workpieces, and after the lifting appliance is stressed, the lifting hooks naturally expand outwards, so that three surfaces in the workpieces are stressed, and stable support is formed. Meanwhile, after the hoisting force is loose, the hoisting hook can automatically retract and fall off, the hoisting operation is completed, the use is convenient, and meanwhile, the operation safety can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment, and more particularly to an automatically retractable triangular safety hook. Background Technology

[0002] In the field of machining, there are many large workpieces with internal cavities, such as... Figure 2 As shown, the handling of large workpieces requires the use of cranes and lifting tools. The commonly used lifting tool is the hook. When lifting such workpieces, the hook is prone to falling off, which poses a significant safety risk. Summary of the Invention

[0003] The purpose of this invention is to provide an automatically retractable triangular safety hook to solve the problem that common hooks cannot lift workpieces with internal cavities.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatically retractable triangular safety hook, comprising: a central rod, a slide rail, a hook, and a support rod. Multiple support rods are installed at the other end of the central rod, and the support rods are rotatably connected to the central rod. A slider that can slide along the central rod is fitted onto the central rod. Multiple force-bearing rods are installed on the slider, one end of each force-bearing rod is rotatably connected to the slider, and the side of each force-bearing rod is correspondingly connected to one of the support rods. A slide rail is provided on the force-bearing rod, and the end of each support rod is confined within the slide rail.

[0005] Furthermore, the end of the support rod is provided with a cylindrical limiting block, the slide is convex in shape, and the limiting block is embedded in the slide.

[0006] Furthermore, a circular baffle is provided on the central rod, the circular baffle is located below the slider, and the diameter of the circular baffle is larger than the diameter of the through hole inside the slider.

[0007] Furthermore, the bottom of the central rod is provided with a connector that is fixedly connected to it, and the connector is rotatably connected to the support rod.

[0008] Furthermore, a hook is provided at the end of the force-bearing rod away from the slider.

[0009] Furthermore, it also includes a lifting ring, which is fixedly connected to the top of the central rod.

[0010] Furthermore, there are three force-bearing rods, and the three force-bearing rods are equidistantly distributed around the circumference.

[0011] Furthermore, there are three support rods, and the three support rods are equidistant from each other around the circumference.

[0012] The technical effects and advantages of this invention are as follows:

[0013] This invention can be used to lift various hollow workpieces. When the lifting device is under force, the hook naturally opens outward, so that the workpiece is stressed on three sides, forming a stable support. At the same time, after the lifting force is released, the hook can automatically retract and fall off, completing the lifting operation. It is convenient to use and ensures operational safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 A schematic diagram of a workpiece with an internal cavity;

[0016] Figure 3 This is a schematic diagram of the structure in the working state of the present invention;

[0017] Figure 4 This is a top view of the invention in its working state;

[0018] Reference numerals in the attached diagram: 1. Lifting ring; 2. Center rod; 3. Slide rail; 4. Circular baffle; 5. Connector; 6. Hook; 7. Sliding block; 8. Force-bearing rod; 9. Support rod. Detailed Implementation

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

[0020] like Figure 1 As shown, to address the shortcomings of existing technologies, this invention discloses an automatically retractable triangular safety hook, comprising: a central rod 2, a slide rail 3, a hook 6, and a support rod 9. Multiple support rods 9 are mounted on the other end of the central rod 2, and the support rods 9 are rotatably connected to the central rod 2. A slider 7, which can slide along the central rod 2, is fitted onto the central rod 2. Multiple force-bearing rods 8 are mounted on the slider 7, one end of each force-bearing rod 8 is rotatably connected to the slider 7, and the side of each force-bearing rod 8 is correspondingly connected to one of the support rods 9. The force-bearing rod 8 is provided with a slide rail 3, and the end of each support rod 9 is confined within the slide rail 3.

[0021] In one embodiment of the present invention, the end of the support rod 9 is provided with a cylindrical limiting block, the slide rail 3 is convex, and the limiting block is embedded in the slide rail 3.

[0022] In one embodiment of the present invention, a circular baffle 4 is provided on the central rod 2. The circular baffle 4 is located below the slider 7. The diameter of the circular baffle 4 is larger than the diameter of the through hole inside the slider 7, so as to prevent the slider 7 from sliding too far.

[0023] In one embodiment of the present invention, the bottom of the central rod 2 is provided with a connector 5 fixedly connected thereto, and the connector 5 is rotatably connected to the support rod 9.

[0024] In one embodiment of the present invention, a hook 6 is provided at the end of the force-bearing rod 8 away from the slider 7.

[0025] In one embodiment of the present invention, an automatically retractable triangular safety hook further includes: a lifting ring 1, wherein the lifting ring 1 is fixedly connected to the top of the central rod 2.

[0026] like Figure 4 As shown, there are three force-bearing rods 8, and the three force-bearing rods 8 are equidistant from each other around the circumference; similarly, there are three support rods 9, and the three support rods 9 are equidistant from each other around the circumference.

[0027] like Figure 3 The operating principle of the present invention is as follows: The load-bearing rod 8 and the hook 6 in their natural state are placed into the hollow workpiece to be lifted. The hook of the crane is hooked into the lifting ring 1. The crane pulls upward. After the load-bearing rod 8 contacts the object to be lifted, it is subjected to a downward force. The bottom of the support rod 9 is pulled upward by the central rod 2 and then opens outward. The top of the support rod 9 slides outward along the slide rail 3. At this time, the hook 6 is pushed outward. After the support rod 9 is pushed outward at a certain angle, the circular baffle 4 on the central rod 2 blocks the slider 7, preventing it from sliding downward. This protects the connecting piece 5 and also prevents the hook from failing if the load-bearing rod 8 is pushed outward at too large an angle. After the load-bearing rod 8 is fully pushed out, it supports the object to be lifted, completing the lifting.

[0028] After the object is hoisted, place it on the ground. Under the action of gravity, the load-bearing rod 8 retracts downward, the slider 7 moves upward naturally through the central rod 2, the support rod 9 slides back naturally through the slide rail 3, and the triangular hook naturally falls off the hoisted object. Remove the triangular hook to complete the hoisting operation.

[0029] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A triangular safety hook that can automatically extend and retract, characterized in that, include: The center rod (2), slide rail (3), hook (6), and support rod (9) are provided. Multiple support rods (9) are installed at the other end of the center rod (2). The support rods (9) are rotatably connected to the center rod (2). A slider (7) that can slide along the center rod (2) is fitted on the center rod (2). Multiple force rods (8) are installed on the slider (7). One end of the force rod (8) is rotatably connected to the slider (7). The side of the force rod (8) is connected to the support rod (9) one by one. The force rod (8) is provided with a slide rail (3). The end of the support rod (9) is restricted within the slide rail (3).

2. The automatically retractable triangular safety hook according to claim 1, characterized in that, The end of the support rod (9) is provided with a cylindrical limiting block, the slide (3) is convex, and the limiting block is embedded in the slide (3).

3. The automatically retractable triangular safety hook according to claim 1, characterized in that, A circular baffle (4) is provided on the central rod (2). The circular baffle (4) is located below the slider (7). The diameter of the circular baffle (4) is larger than the diameter of the through hole inside the slider (7).

4. The automatically retractable triangular safety hook according to claim 1, characterized in that, The bottom of the central rod (2) is provided with a connector (5) that is fixedly connected to it, and the connector (5) is rotatably connected to the support rod (9).

5. The automatically retractable triangular safety hook according to claim 1, characterized in that, The force-bearing rod (8) is provided with a hook (6) at the end away from the slider (7).

6. The automatically retractable triangular safety hook according to claim 1, characterized in that, Also includes: The lifting ring (1) is fixedly connected to the top of the central rod (2).

7. The automatically retractable triangular safety hook according to claim 1, characterized in that, There are three force-bearing rods (8), and the three force-bearing rods (8) are equidistant from each other around the circumference.

8. The automatically retractable triangular safety hook according to claim 7, characterized in that, There are three support rods (9), and the three support rods (9) are equidistant from each other around the circumference.

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