Self-unhooking device

Abstract

The application discloses a self-unhooking device, 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 is connected with the connecting block, the top end of the main hook extends into the fixing cylinder, and a load bearing pin is arranged between 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 an opening direction, so that the main hook and the suspender can be automatically separated after the switch cabinet is transported to a specified position without manual intervention.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary equipment for switchgear installation, and more specifically relates to a self-detaching hook. Background Technology

[0002] As power equipment develops towards miniaturization and intelligence, the problems of complex procedures, limited space, diverse models, and high manpower input in its assembly are becoming increasingly prominent. With the continuous expansion of the power grid and the year-on-year increase in labor costs, manual installation of power equipment is becoming increasingly difficult to meet the needs of modern power grid construction.

[0003] Some switchgear is transported and installed by hoisting. During hoisting, hooks are used to attach the switchgear to the lifting rings on top. After the hoisting is completed, it is necessary to manually go to the top of the switchgear to remove the hooks, which is quite troublesome and inefficient. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method that enables the main hook and lifting ring to automatically disengage after the switch cabinet has been moved to a designated location, without the need for manual intervention.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-detaching hook, comprising a lifting rod, a connecting block, a fixed cylinder, and a main hook, wherein the connecting block is fixed to the top of the fixed cylinder, the lifting rod is connected to the connecting block, the top end of the main hook extends into the fixed cylinder, and a load-bearing pin is provided between the main hook and the fixed cylinder, and a torsion spring is provided between the load-bearing pin and the main hook, the torsion spring causing the main hook to rotate in the opening direction.

[0006] Furthermore, the boom passes through the connecting block into the fixed cylinder, and an anti-detachment head is provided at one end of the boom that extends into the fixed cylinder. The boom and the connecting block are slidably connected in the vertical direction. A safety fastener is provided in the fixed cylinder, and a retaining spring is connected to the safety fastener. The retaining spring causes the safety fastener to move upward. The top of the safety fastener abuts against the anti-detachment head. A safety claw is provided in the fixed cylinder between the safety fastener and the main hook. When the main hook is closed, the safety claw prevents the main hook from rotating in the opening direction.

[0007] Furthermore, a pin is provided between the safety claw and the fixed cylinder, and a stop block is provided on the main hook. When the main hook is closed, one end of the safety claw abuts against the stop block, and the other end of the safety claw is connected to the safety fastener.

[0008] Furthermore, the safety fastener has a positioning groove, and the end of the safety claw extends into the positioning groove.

[0009] Furthermore, the safety fastener is in the shape of an "n", and the positioning groove is provided on the side of the safety fastener.

[0010] Furthermore, a load-bearing bracket is provided inside the fixed cylinder. The load-bearing bracket is "n"-shaped and forms a guide groove with the fixed cylinder. The side of the safety fastener extends into the guide groove.

[0011] Furthermore, the side of the main hook is provided with a limiting protrusion, which abuts against the fixed cylinder when the main hook is opened.

[0012] Compared with the prior art, the beneficial effects of the present invention are: when used with a forklift, after the switch cabinet is placed, it can be automatically unhooked without manual removal; during the hoisting and transportation process, the main hook can be prevented from being opened by the safety claws, thus preventing unhooking and making it safer. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of the switchgear hoisting device;

[0014] Figure 2 This is a 3D structural diagram of the self-detaching hook;

[0015] Figure 3 This is a cross-sectional view of the self-detaching hook (when closed);

[0016] Figure 4 This is an enlarged view of the safety fastener in this invention.

[0017] Figure 5 This is a cross-sectional view of the self-detaching hook (when open).

[0018] Attached reference numerals: 1. Top beam; 11. Longitudinal beam; 12. Cross beam; 121. Opening; 2. Self-detaching hook; 21. Lifting rod; 211. Anti-detachment head; 212. Locking nut; 22. Fixing cylinder; 23. Main hook; 231. Stop block; 232. Limiting protrusion; 24. Safety fastener; 241. Positioning groove; 25. Safety claw; 26. Torsion spring; 27. Compression spring; 28. Load-bearing bracket; 29. ​​Connecting block; 3. Lifting ring. Detailed Implementation

[0019] Reference Figures 1 to 5 The embodiments of the self-detaching hook of the present invention will be further described.

[0020] In the description of this invention, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0021] 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. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this invention, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0022] A switchgear hoisting device includes a hoisting upper beam 1 and a plurality of hooks. The upper beam 1 is provided with an opening 121 that cooperates with the forks of a forklift. The hooks are self-detaching hooks 2, which are fixed below the upper beam 1.

[0023] In practical applications, multiple lifting rings 3 are arranged on the top of the switch cabinet to cooperate with the self-detaching hooks 2.

[0024] In this preferred embodiment, the upper beam 1 includes a crossbeam 12 and a longitudinal beam 11. The crossbeam 12 and the longitudinal beam 11 are fixedly connected to each other. The opening 121 is located on the crossbeam 12, and the self-detaching hook 2 is fixed on the longitudinal beam 11.

[0025] like Figure 1 As shown, in this embodiment, there are two crossbeams 12 and two longitudinal beams 11. The crossbeams 12 and the longitudinal beams 11 are locked together by fasteners. The opening 121 passes through the crossbeam 12. When the forks of the forklift are inserted, the upper beam 1 can maintain a relatively static and stable position relative to the forks.

[0026] The crossbeam 12 has a slotted groove. By adjusting the connection position between the longitudinal beam 11 and the crossbeam 12, the lateral position of the longitudinal beam 11 can be controlled.

[0027] like Figure 1 As shown, in this preferred embodiment, the longitudinal beam 11 is provided with a strip groove, and the self-detaching hook 2 includes a lifting rod 21. The lifting rod 21 passes through the strip groove and is threaded with two sets of locking nuts 212. The two sets of locking nuts 212 are located on the upper and lower sides of the longitudinal beam 11.

[0028] The position of the self-detaching hook 2 can be adjusted by the strip groove, that is, the longitudinal position of the self-detaching hook 2 can be controlled. Combined with the position of the longitudinal beam 11 on the transverse beam 12, the position of the self-detaching hook 2 on the horizontal plane can be controlled to ensure that multiple self-detaching hooks 2 can hook the lifting ring 3 at the same time.

[0029] In one preferred embodiment, the self-detaching hook 2 further includes a connecting block 29, a fixing cylinder 22, and a main hook 23. The connecting block 29 is fixed to the top of the fixing cylinder 22, the lifting rod 21 is connected to the connecting block 29, the top end of the main hook 23 extends into the fixing cylinder 22, and a load-bearing pin is provided between the main hook 23 and the fixing cylinder 22. A torsion spring 26 is provided between the load-bearing pin and the main hook 23, and the torsion spring 26 causes the main hook 23 to rotate in the opening direction.

[0030] In this embodiment, the torsion spring 26 is preferably a double torsion spring.

[0031] The opening direction of the main hook 23 refers to the direction in which the main hook 23 can disengage from the lifting ring 3, and vice versa.

[0032] In use, the upper beam 1 is first secured to the forklift forks. Then, the entire upper beam 1 is moved above the switch cabinet to be transported, and the main hook 23 is hooked onto the lifting ring 3. The forks are then moved upwards, and under the weight of the switch cabinet, the main hook 23 will completely hook onto the lifting ring 3. After reaching the designated position, the forks are moved downwards, and the switch cabinet is placed on the ground. The forks continue to move downwards, at which point the main hook 23 will move downwards within the lifting ring 3. Without the restriction of the lifting ring 3, the main hook 23 will rotate in the opening direction under the action of the torsion spring 26. The forklift can move in the opposite direction of the opening 121 of the main hook 23 to remove the main hook 23, realizing the self-unhooking function without manual intervention.

[0033] In this preferred embodiment, the boom 21 passes through the connecting block 29 into the fixed cylinder 22, and one end of the boom 21 extending into the fixed cylinder 22 is provided with an anti-detachment head 211. The boom 21 and the connecting block 29 are slidably connected in the vertical direction. A safety fastener 24 is provided in the fixed cylinder 22, and a retaining spring is connected to the safety fastener 24. The retaining spring causes the safety fastener 24 to move upward. The top of the safety fastener 24 abuts against the anti-detachment head 211. A safety claw 25 is provided in the fixed cylinder 22 between the safety fastener 24 and the main hook 23. When the main hook 23 is closed, the safety claw 25 prevents the main hook 23 from rotating in the opening direction.

[0034] Specifically, a pin is provided between the safety claw 25 and the fixed cylinder 22, and a stop block 231 is provided on the main hook 23. When the main hook 23 is closed, one end of the safety claw 25 abuts against the stop block 231, and the other end of the safety claw 25 is connected to the safety fastener 24.

[0035] like Figure 3As shown, the main hook 23 is in a closed state at this time. In order to completely close one side of the opening 121 of the main hook 23, the fixed cylinder 22 preferably extends downward on the side corresponding to the opening 121 of the main hook 23. When the main hook 23 is closed, its opening 121 is blocked by the side wall of the fixed cylinder 22.

[0036] like Figure 4 As shown, for a clear understanding of the present invention, the end of the safety claw 25 facing the stop block 231 is referred to as the passive end and the other end as the active end. The retaining spring keeps the retaining fastener at the top, and under the action of the lever, the active end of the safety claw 25 is pulled upward and the passive end is pressed downward. The passive end abuts against the stop block 231. At this time, even if there is no heavy lifting ring 3 pulling below the main hook 23, it cannot rotate in the opening direction (clockwise). That is, it is ensured that during the transfer of the switch cabinet, the main hook 23 always remains in a mutually hooked state with the lifting ring 3, and the lifting ring 3 cannot be dislodged.

[0037] After the switchgear is lowered, as the upper beam 1 continues to descend, the main hook 23 or other components abut against the lifting ring 3 or the switchgear. The lifting rod 21 extends further into the fixed cylinder 22, and the anti-detachment head 211 presses down on the safety fastener 24, overcoming the force of the retaining spring. The safety fastener 24 then moves downwards. Figure 5 As shown, the active end of the safety claw 25 swings downward and the passive end of the safety claw 25 swings upward, disengaging from the stop block 231. At this time, the main hook 23 is no longer affected by the safety claw 25 and will rotate in the opening direction (clockwise) under the action of the torsion spring 26, causing the lifting ring 3 to disengage, thus completing the unhooking process.

[0038] When the main hook 23 closes again, as long as the upper beam 1 is lifted, the safety fastener 24 will move upward and reset. After the main hook 23 rotates in the closing direction, the safety pawl 25 will abut against the stop block 231 again.

[0039] In this preferred embodiment, the safety fastener 24 is provided with a positioning groove 241, and the end of the safety claw 25 extends into the positioning groove 241.

[0040] The active end of the safety claw 25 extends into the positioning groove 241. The positioning groove 241 only restricts the position of the safety claw 25 in the vertical direction, which ensures that the safety fastener 24 can drive the safety claw 25 to rotate around the pin shaft during the up and down movement.

[0041] like Figure 3 The safety fastener 24 shown is in the shape of an "n", and the positioning groove 241 is provided on the side of the safety fastener 24.

[0042] The side of the safety fastener 24 is basically in contact with the inner wall of the fixing cylinder 22. The movement of the safety fastener 24 is restricted by the inner wall of the fixing cylinder 22 to prevent it from tilting.

[0043] In one embodiment, a load-bearing bracket 28 is provided inside the fixed cylinder 22. The load-bearing bracket 28 is "n" shaped and forms a guide groove with the fixed cylinder 22. The side of the safety fastener 24 extends into the guide groove.

[0044] The load-bearing bracket 28 is completely fixed to the fixed cylinder 22, and the load-bearing pin can pass through the load-bearing bracket 28 and the fixed cylinder 22 at the same time. The further retaining spring can be a compression spring 27, one end of which abuts against the top of the load-bearing bracket 28 and the other end abuts against the bottom of the safety fastener 24. In order to maintain the stable movement of the safety fastener 24, it is preferable to have a guide post at the top of the load-bearing bracket 28, the compression spring 27 is sleeved on the guide post, and a guide hole is opened on the safety fastener 24, through which the guide post passes.

[0045] The load-bearing bracket 28 can also be considered as an integral part of the fixed cylinder 22.

[0046] In this preferred embodiment, the main hook 23 is provided with a limiting protrusion 232 on its side. When the main hook 23 is opened, the limiting protrusion 232 abuts against the fixed cylinder 22.

[0047] The maximum opening angle of the main hook 23 can be limited by the limiting protrusion 232.

[0048] This invention can also be combined with the earlier Chinese patent application, publication number CN114675637A, to achieve automated switch cabinet transfer and handling.

[0049] 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 embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing 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, characterized in that: It includes a boom, a connecting block, a fixed cylinder, and a main hook. The connecting block is fixed to the top of the fixed cylinder. The boom is connected to the connecting block. The top of the main hook extends into the fixed cylinder. A load-bearing pin is provided between the main hook and the fixed cylinder. A torsion spring is provided between the load-bearing pin and the main hook. The torsion spring causes the main hook to rotate in the opening direction. The boom passes through the connecting block into the fixed cylinder, and an anti-detachment head is provided at one end of the boom that extends into the fixed cylinder. The boom and the connecting block are slidably connected in the vertical direction. A safety fastener is provided in the fixed cylinder, and a retaining spring is connected to the safety fastener. The retaining spring causes the safety fastener to move upward. The top of the safety fastener abuts against the anti-detachment head. A safety claw is provided in the fixed cylinder between the safety fastener and the main hook. When the main hook is closed, the safety claw prevents the main hook from rotating in the opening direction. A pin is provided between the safety claw and the fixed cylinder, and a stop block is provided on the main hook. When the main hook is closed, one end of the safety claw abuts against the stop block, and the other end of the safety claw is connected to the safety fastener. The safety fastener has a positioning groove, and the end of the safety claw extends into the positioning groove; The safety fastener is in the shape of an "n", and the positioning groove is formed on the side of the safety fastener; The fixed cylinder is equipped with a load-bearing bracket, which is "n" shaped and forms a guide groove with the fixed cylinder. The side of the safety fastener extends into the guide groove.

2. The self-detaching hook according to claim 1, characterized in that: The side of the main hook is provided with a limiting protrusion, which abuts against the fixed cylinder when the main hook is opened.

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