Self-unhooking hook with safety for lifting

Abstract

The application discloses a self-unhooking hook with safety for hoisting, which comprises a suspender, a connecting block, a fixing cylinder and a main hook, the connecting block is fixed on the top of the fixing cylinder, the suspender passes through the connecting block into the fixing cylinder, and the end of the suspender extending into the fixing cylinder is provided with an anti-unhooking head, the suspender and the connecting block are slidably connected in the vertical direction, a load bearing pin is arranged between the top end of the main hook and the fixing cylinder, a torsional spring is arranged between the load bearing pin and the main hook, and the torsional spring rotates the main hook to the opening direction; a safety buckle is arranged in the fixing cylinder, the safety buckle is connected with a retaining spring, the retaining spring moves the safety buckle upward, the top of the safety buckle abuts against the anti-unhooking head, the bottom end of the safety buckle extends out of the fixing cylinder to form a safety hook, a safety pin is arranged on the main hook, the safety pin is located in the safety hook when the main hook is closed, and the safety pin is out of the safety hook when the safety hook moves downward, and the application can realize stable closing of the main hook and automatic opening after carrying.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary equipment for switch cabinet installation, and more particularly relates to a self-detaching hook with a safety for hoisting. Background Art

[0002] As power equipment continues its trend toward miniaturization and intelligentization, complex assembly processes, tight spaces, a wide variety of models, and high labor requirements are becoming increasingly prominent. With the ever-expanding scale of power grids and the annual increase in labor costs, manual installation of power equipment is increasingly unable to meet the demands of modern power grid construction.

[0003] Some switch cabinets are transported and installed by hoisting. During hoisting, a hook is used to hook the lifting ring above the switch cabinet for transportation. After hoisting, manual labor is required to remove the hook from above the switch cabinet, which is troublesome and inefficient. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method in which the main hook can be automatically disengaged after the switch cabinet is placed, and during the transportation and transfer process, the main hook is locked and cannot be disengaged, which is safer and more convenient.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a self-detaching hook for lifting with safety, comprising a lifting rod, a connecting block, a fixing cylinder and a main hook, the connecting block being fixed at the top of the fixing cylinder, the lifting rod passing through the connecting block to the fixing cylinder, and an anti-slip head is provided at one end of the lifting rod extending into the fixing cylinder, the lifting rod and the connecting block are slidably connected in a vertical direction, the top end of the main hook extends into the fixing cylinder, and a bearing pin is provided between the main hook and the fixing cylinder, and a torsion spring is provided between the bearing pin and the main hook, which causes the main hook to rotate in the opening direction; a safety fastener is provided in the fixing cylinder, the safety fastener is connected to a retaining spring, and the retaining spring causes the safety fastener to move upward, the top of the safety fastener rests on the anti-slip head, and the bottom end of the safety fastener extends out of the fixing cylinder to form a safety hook, and a safety pin is provided on the main hook. When the main hook is closed, the safety pin is located in the safety hook, and when the safety hook moves downward, the safety pin falls out of the safety hook.

[0006] Furthermore, a limiting protrusion is provided on the side surface of the main hook, and the safety pin is fixed on the limiting protrusion.

[0007] Furthermore, two safety hooks are provided, and the two safety hooks are symmetrically arranged on both sides of the main hook, and the safety pin extends from the limiting protrusion to both sides of the safety hook.

[0008] Furthermore, the torsion spring is a double torsion spring.

[0009] Furthermore, the safety fastener is in an "n" shape, and the side wall of the safety fastener is attached to the inner side of the fixing tube.

[0010] Furthermore, a load-bearing bracket is provided in the fixed tube, the load-bearing bracket is in an "n" shape, and a guide groove is formed between the load-bearing bracket and the fixed tube, and the side surface of the safety fastener extends into the guide groove.

[0011] Furthermore, the retaining spring is a compression spring, which is located between the load-bearing bracket and the safety fastener.

[0012] Furthermore, the top of the load-bearing bracket is provided with a guide column, the compression spring is sleeved on the guide column, and a guide hole is provided on the safety fastener, and the guide column passes through the guide hole.

[0013] Compared with the prior art, the present invention has the following advantages: when used in conjunction with a forklift, the switch cabinet can be automatically unhooked without manual removal after it is placed; during the lifting and transportation process, the main hook can be prevented from being opened and unhooked under the action of the safety hook and the safety pin, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional structural diagram of the self-detaching hook for lifting with a safety mechanism of the present invention (when closed);

[0015] Figure 2 A side view of the self-releasing hook for lifting with a safety mechanism according to the present invention (when closed);

[0016] Figure 3 It is a cross-sectional view of the self-detaching hook for lifting with a safety of the present invention (when closed);

[0017] Figure 4 This is a three-dimensional structural diagram of the self-detaching hook for lifting with a safety mechanism of the present invention (when opened);

[0018] Figure 5 A side view of the self-detaching hook for lifting with a safety mechanism according to the present invention (when opened);

[0019] Figure 6 The figure is a cross-sectional view of the self-detaching hook for lifting with safety of the present invention (when opened).

[0020] Figure numerals: 21, lifting rod; 211, anti-slip head; 212, fastener; 22, fixing tube; 23, main hook; 231, limiting protrusion; 24, safety fastener; 241, safety hook; 25, safety pin; 26, torsion spring; 27, compression spring; 28, load-bearing bracket; 29, connecting block; 3, lifting ring. DETAILED DESCRIPTION

[0021] Reference Figures 1 to 6 The embodiment of the self-detachable hook for lifting with safety of the present invention is further described.

[0022] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. Throughout the description of the present invention, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0024] A self-releasing hook for lifting with insurance includes a boom 21, a connecting block 29, a fixed cylinder 22 and a main hook 23. The connecting block 29 is fixed to the top of the fixed cylinder 22. The boom 21 passes through the connecting block 29 to the fixed cylinder 22, and an anti-slip head 211 is provided at one end of the boom 21 extending into the fixed cylinder 22. The boom 21 and the connecting block 29 are slidably connected in the vertical direction. The top end of the main hook 23 extends into the fixed cylinder 22, and a bearing pin is provided between the main hook 23 and the fixed cylinder 22. A torsion spring 21 is provided between the bearing pin and the main hook 23. 6. The torsion spring 26 causes the main hook 23 to rotate in the opening direction; a safety fastener 24 is provided in the fixed cylinder 22, and the safety fastener 24 is connected to a retaining spring. The retaining spring causes the safety fastener 24 to move upward, and the top of the safety fastener 24 is against the anti-slip head 211, and the bottom end of the safety fastener 24 extends out of the fixed cylinder 22 to form a safety hook 241. A safety pin 25 is provided on the main hook 23. When the main hook 23 is closed, the safety pin 25 is located in the safety hook 241, and when the safety hook 241 moves downward, the safety pin 25 falls out of the safety hook 241.

[0025] In this embodiment, the boom 21 is mounted on an upper beam via a fastener 212. The upper beam can cooperate with the forks of a forklift. The boom 21 is fixed to the upper beam. When the upper beam moves up and down, the boom 21 moves synchronously.

[0026] The torsion spring 26 is preferably a double torsion spring, which is symmetrically arranged on the side of the main hook 23 so that the main hook 23 can be evenly stressed.

[0027] The opening direction of the main hook 23 refers to the direction in which the main hook 23 can be separated from the lifting ring 3, and vice versa is the closing direction of the main hook 23.

[0028] like Figure 1-3 As shown, the main hook 23 is in a closed state at this time. In order to make the open side of the main hook 23 completely closed, the fixed cylinder 22 preferably extends downward on the side corresponding to the opening of the main hook 23. When the main hook 23 is closed, its opening is blocked by the side wall of the fixed cylinder 22.

[0029] When the switch cabinet is lifted in cooperation with the lifting ring 3, the retaining spring keeps the retaining fastener at the top. At this time, the safety pin 25 is in the safety hook 241. The main hook 23 has a tendency to rotate clockwise, but the safety hook 241 blocks the safety pin 25. At this time, even if there is no heavy lifting ring 3 below the main hook 23, it cannot rotate in the opening direction (clockwise). In other words, during the transportation of the switch cabinet, the main hook 23 is always hooked with the lifting ring 3, and the lifting ring 3 cannot fall out.

[0030] After the switch cabinet is lowered, as the upper beam continues to descend, the main hook 23 or other components abut against the lifting ring 3 or the switch cabinet, and the suspension rod 21 further extends into the fixing tube 22. The anti-slip head 211 presses the safety fastener 24 downward to overcome the force of the retaining spring, and the safety fastener 24 moves downward. Figure 4-6 As shown, the safety hook 241 is moved downward, and the safety pin 25 is disengaged from the safety hook 241. Under the action of the torsion spring 26, the main hook 23 rotates in the opening direction (clockwise) to disengage the ring 3, thus completing the unhooking.

[0031] When the main hook 23 is closed again, as long as the upper beam is hoisted, the safety fastener 24 will move upward and reset. After the main hook 23 rotates in the closing direction, the safety pin 25 can enter the safety hook 241.

[0032] In this embodiment, a limiting protrusion 231 is preferably provided on the side surface of the main hook 23 , and the safety pin 25 is fixed on the limiting protrusion 231 .

[0033] The limiting protrusion 231 can not only be used to fix the limiting pin, but also cooperate with the limiting pin to limit the opening angle of the main hook 23 and facilitate the application of force to close the main hook 23. Of course, in one embodiment, the main hook 23 can also be connected to a motor to achieve closure by electric means.

[0034] In this embodiment, two safety hooks 241 are preferably provided. The two safety hooks 241 are symmetrically arranged on both sides of the main hook 23 , and the safety pin 25 extends from the limiting protrusion 231 to both sides of the safety hook 241 .

[0035] like Figure 1 and 2 As shown, after the safety pin 25 on the main hook 23 extends into the safety hook 241, both sides thereof are restricted at the same time and the force is evenly applied.

[0036] In one embodiment, the safety fastener 24 is in an “n” shape, and the sidewall of the safety fastener 24 is attached to the inner side of the fixing tube 22 .

[0037] The side surface of the safety fastener 24 is substantially in contact with the inner wall of the fixing tube 22 , and the movement of the safety fastener 24 is restricted by the inner wall of the fixing tube 22 to prevent the safety fastener 24 from tilting.

[0038] Preferably, a load-bearing bracket 28 is provided in the fixing tube 22 . The load-bearing bracket 28 is in an “n” shape and forms a guide groove with the fixing tube 22 . The side surface of the safety fastener 24 extends into the guide groove.

[0039] The load-bearing bracket 28 is completely fixed to the fixed tube 22, and the load-bearing pin can pass through the load-bearing bracket 28 and the fixed tube 22 at the same time. The further retaining spring can be a compression spring 27, one end of which is against the top of the load-bearing bracket 28 and the other end is against the bottom of the safety fastener 24. In order to maintain the stable movement of the safety fastener 24, it is preferred to have a guide column on the top of the load-bearing bracket 28, the compression spring 27 is sleeved on the guide column, and a guide hole is opened on the safety fastener 24, and the guide column passes through the guide hole.

[0040] The load-bearing bracket 28 can also be considered as being integrated with the fixing tube 22 .

[0041] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A self-detaching hook for lifting with a safety feature, characterized by: The cam is secured to the outside of the drawbar and is secured to the chassis, and the cam is secured to the chassis by a spring which is secured to the chassis base and is designed to lock the drawbar. The cam is secured to the chassis by a spring which is secured to the chassis base and is designed to lock the drawbar. The cam is secured to the chassis by a spring which is secured to the chassis base and is designed to lock the drawbar.

2. The self-detaching hook for lifting with a safety according to claim 1, characterized in that: A limiting protrusion is provided on the side surface of the main hook, and the safety pin is fixed on the limiting protrusion.

3. The self-detaching hook for lifting with a safety according to claim 2, characterized in that: Two safety hooks are provided, and the two safety hooks are symmetrically arranged on both sides of the main hook. The safety pin extends from the limiting protrusion to both sides of the safety hook.

4. The self-detaching hook for lifting with a safety according to claim 2, characterized in that: The torsion spring is a double torsion spring.

5. The self-detaching hook for lifting with a safety according to claim 4, characterized in that: The safety fastener is in an "N" shape, and the side wall of the safety fastener is attached to the inner side of the fixing tube.

6. The self-detaching hook for lifting with a safety according to claim 5, characterized in that: A load-bearing bracket is provided in the fixed cylinder. The load-bearing bracket is in an "N" shape and forms a guide groove between the load-bearing bracket and the fixed cylinder. The side surface of the safety fastener extends into the guide groove.

7. The self-detaching hook for lifting with a safety according to claim 6, characterized in that: The retaining spring is a compression spring, and the compression spring is located between the load-bearing bracket and the safety fastener.

8. The self-detaching hook for lifting with a safety according to claim 7, characterized in that: The top of the load-bearing bracket is provided with a guide column, the compression spring is sleeved on the guide column, and a guide hole is provided on the safety fastener, and the guide column passes through the guide hole.

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