A kind of anti-drop hook for plate hole type lifting lug that can be quickly hung and dropped

Abstract

The application discloses a plate hole type lifting lug anti-falling hook capable of being quickly hung and detached, which comprises a lifting lug fork block, a bearing bolt and a lock pin. The lifting lug fork block comprises a connecting part and a guide part. One end of the connecting part is provided for being connected with external hoisting equipment, and the other end of the connecting part is formed with a fork opening in a two-fork structure for inserting a workpiece to be hoisted. The guide part is hollow and fixedly connected with the fork opening and communicates with the fork opening. The bearing bolt comprises a bolt main body. The bolt main body has at least two working positions relative to the lifting lug fork block. In the first working position, the bolt main body is inserted into the guide part. In the second working position, the bolt main body is inserted into the guide part and the fork opening. The lock pin comprises a lock pin shaft which can be inserted into the guide part and the bolt main body, so that the bolt main body is selectively locked in the first working position or the second working position. The anti-falling hook is safe, quick and efficient in operation.

Description

Technical Field

[0001] This invention relates to the technical field of lifting hooks, and in particular to an anti-detachment lifting hook for a plate-hole type lifting lug that can be quickly attached and detached. Background Technology

[0002] Traditional anti-detachment hooks are inexpensive and versatile, but they require sufficient vertical movement when hooking and unhooking. The hook and lug fit loosely, and the arc-shaped hook can easily leave indentations on the lug when lifting aluminum workpieces with plate holes, affecting the appearance of the workpiece. They are also unsuitable for use with guides (where the position between the guide and the workpiece needs to be relatively accurate). Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a quick-release anti-detachment hook for plate-hole type lifting lugs. While ensuring safety, it is quicker and more efficient to operate, and the shape of the hook structure is more suitable for lifting workpieces with plate-hole type lifting lugs.

[0004] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is an anti-detachment hook for a plate hole type lifting lug that can be quickly hooked and unhooked, comprising: lifting lug fork block, load-bearing pin and locking pin;

[0005] The lifting lug block includes a connecting part and a guiding part. One end of the connecting part is for connecting with external lifting equipment, and the other end of the connecting part has a fork with a bifurcated structure for inserting the workpiece to be lifted. The guiding part is hollow and is fixedly connected to and communicates with the fork.

[0006] The load-bearing pin includes a pin body, which has at least two working positions relative to the lifting lug block. In the first working position, the pin body is inserted into the guide portion, and in the second working position, the pin body is inserted into both the guide portion and the fork opening.

[0007] The locking pin includes a locking pin shaft, which can be inserted into the guide portion and the pin body, so that the pin body can be selectively locked in the first working position or the second working position.

[0008] In a preferred embodiment of the present invention, the guide portion is a hollow straight tube, one shaft end of the guide portion is fixedly connected to and communicates with the fork opening, and the other shaft end of the guide portion is provided with a mounting hole for the locking pin to pass through and install; the fork opening is provided with a pin hole.

[0009] In a preferred embodiment of the present invention, a hanging hole is provided on one end of the connecting portion.

[0010] In a preferred embodiment of the present invention, the main body of the pin is long and divided into two sections along its length. The first section of the main body of the pin can be inserted into the fork and the pin hole. The second section of the main body of the pin is provided with a first limiting groove, a second limiting groove and a third limiting groove in sequence along its length.

[0011] In a preferred embodiment of the present invention, the first limiting hole groove and the second limiting hole groove are both circular hole grooves, the axis of the first limiting hole groove is perpendicular to the axis of the second limiting hole groove, and the third limiting hole groove extends along the axial direction of the pin body and has a strip-shaped hole structure in cross-section.

[0012] In a preferred embodiment of the present invention, an anti-detachment groove is formed on the first segment of the pin body.

[0013] In a preferred embodiment of the present invention, the load-bearing pin further includes a first return spring and a button cover. The first return spring is a compression spring. The first return spring is sleeved on the first section of the pin body, and its two ends elastically abut against the first section of the pin body and the fork, respectively. The button cover is positioned and inserted into the first limiting hole groove.

[0014] In a preferred embodiment of the present invention, the locking pin further includes a locking pin seat, which is a hollow structure and sleeved on the other shaft end of the guide portion. The locking pin shaft passes through the inner cavity of the locking pin seat and, after passing through the mounting hole, can be selectively inserted into the second limiting hole groove or the third limiting hole groove. A groove is provided at the bottom of the locking pin shaft, and the outer diameter of the groove is larger than the width of the third limiting hole groove and slightly smaller than the diameter of the second limiting hole groove.

[0015] In a preferred embodiment of the present invention, the locking pin further includes a limiting pin and a second return spring. The locking pin shaft seat is also provided with a through hole for the limiting pin to pass through. The second return spring is disposed between the groove at the bottom of the locking pin shaft and the inner cavity of the locking pin shaft seat, providing elastic return force for the locking pin shaft.

[0016] In a preferred embodiment of the present invention, the upper part of the locking pin shaft is provided with a limiting slot extending along its length direction, and the limiting pin passes through the through hole and the limiting slot, thereby limiting and guiding the stroke of the locking pin shaft.

[0017] The beneficial effects of this invention are: This practical anti-derailment hook for plate hole type lifting lugs that can be quickly hooked and unhooked makes hooking and unhooking more convenient and quick. Hooking and unhooking can be completed by a push-press action when the hook is not under force. Moreover, its pin-type fixing form is more compatible with plate hole type lifting lugs and is more suitable for production occasions with short cycle time and high automation rate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0019] Figure 1 This is a side view of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention;

[0021] Figure 3 This is a schematic diagram showing the load-bearing pin in the retracted and reset state.

[0022] Figure 4 This is a schematic diagram showing the load-bearing pin in the inserted state. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0024] Please see Figure 1-4 The present invention provides a quick-release plate hole type lifting lug anti-detachment hook, comprising: lifting lug fork block, load-bearing pin and locking pin;

[0025] The lifting lug block 1 includes a connecting part 10 and a guide part 11. One end of the connecting part 10 is provided with a hanging hole 12, which is used to connect with external lifting equipment for lifting. The other end of the connecting part 10 is formed with a fork 13 with a bifurcated structure, and a pin hole 14 is also provided on the fork 13. The fork 13 is mainly used to restrict the left and right directions of the plate hole lifting lug (i.e., the workpiece to be lifted), and the pin hole 14 is used to cooperate with the load-bearing pin 2 to bear the load.

[0026] The guide part 11 is a hollow straight tube. One shaft end of the guide part 11 is fixedly connected to and communicates with the fork 13. The other shaft end of the guide part 11 is provided with a mounting hole. The guide part 11 is used to guide and support the movement of the load-bearing pin 2. The mounting hole is used for the locking pin 3 to pass through and be installed.

[0027] The load-bearing pin 2 mainly cooperates with the fork 13 to complete the closed loop and lift the workpiece. It can be automatically reset by the first return spring 21. The load-bearing pin 2 includes a pin body 20, a first return spring 21, and a button cover 22. The pin body 20 is the load-bearing body and is used to pass through the lifting lug hole to lift the workpiece. The pin body 20 is long and divided into two sections along its length. The first section of the pin body 20 can be inserted into the fork 13 and the pin hole 14. An anti-detachment groove 23 is formed on the first section of the pin body 20. The anti-detachment groove 23 is used to lock the lifting lug when the workpiece has been lifted, thereby preventing the weighing pin 2 from being opened by accident and causing the workpiece to fall off. The second section of the pin body 20 is provided with three limiting slots, which are the first limiting slot 240, the second limiting slot 241, and the third limiting slot 242 along the length direction. The first limiting slot 240... Both the first limiting slot 240 and the second limiting slot 241 are circular slots, and the axis of the first limiting slot 240 is perpendicular to the axis of the second limiting slot 241. The third limiting slot 242 is a structure that extends axially along the pin body 20 and has a strip-shaped cross-section. In addition, the second limiting slot 241 and the third limiting slot 242 are connected (the first limiting slot 240 may or may not be connected to them), and the second limiting slot 241 and the third limiting slot 242 can also be connected to the aforementioned mounting hole. That is, when the locking pin 3 is inserted into the mounting hole and the second limiting slot 241, it can restrict the displacement of the pin body 20, so that the pin body 20 is locked in the inserted state (i.e., the second working position); and when the locking pin 3 is inserted into the mounting hole and the third limiting slot 242, it can restrict the displacement of the pin body 20, so that the pin body 20 is kept in the reset and retracted state (i.e., the first working position).

[0028] The first reset spring 21 is a compression spring used to automatically and elastically reset the pin body 20. The first reset spring 21 is sleeved on the first section of the pin body 20, and its two ends elastically abut against the first section of the pin body 20 and the fork 13 respectively. The button cover 22 is positioned and inserted into the first limiting hole groove 240 for manually pushing and pressing the pin body 20.

[0029] Locking pin 3, perpendicular to the load-bearing pin 2, is used to restrict the state of the load-bearing pin 2, locking it in the inserted state or automatically retracting it. Locking pin 3 includes a locking pin seat 30, a locking pin shaft 31, a limiting pin 32, and a second return spring 33. The locking pin seat 30 is a hollow structure, mainly used to connect and guide the locking pin shaft 31. The locking pin seat 30 is sleeved on the other end of the guide portion 11 and fixed to the guide portion 11 by a pin. The locking pin seat 30 is provided with a locking pin for the locking pin shaft 31 to insert into. The opening in the inner cavity of the shaft seat 30 and the through hole 34 for the limit pin 32 to pass through, the locking pin 31 passes through the inner cavity of the locking pin seat 30, the mounting hole, the second limit hole groove 241 / or the third limit hole groove 242, and is used as a locking or unlocking pin body 20; and the upper part of the locking pin 31 is provided with a limit groove 35 extending along its length direction, and the bottom of the locking pin 31 is provided with a groove. The limit pin 32 passes through the through hole 34 and the limit groove 35, thereby limiting and guiding the stroke of the locking pin 31.

[0030] The second return spring 33 is placed between the groove at the bottom of the locking pin 31 and the inner cavity of the locking pin seat 30, providing elastic return force for the locking pin 31. In addition, the outer diameter of the groove at the bottom of the locking pin 31 is larger than the width of the third limiting hole groove 242 and slightly smaller than the diameter of the second limiting hole groove 241.

[0031] The working method of the anti-detachment hook of the present invention is as follows: when the pin body 20 is in the retracted state under the action of the first return spring 21, the locking pin shaft 31 is in the retracted state. At this time, the groove at the bottom of the locking pin shaft 31 stops outside the third limiting hole groove 242, so that the locking pin shaft 31 will not automatically extend under the action of the second return spring 33, thereby locking the pin body 20 and preventing it from automatically retracting.

[0032] When the button cover 22 is pushed by hand to extend the pin body 20 into place (i.e., the first section of the pin body 20 is inserted into the fork 13 and the pin hole 14), the groove at the bottom of the locking pin shaft 31 will just enter the second limiting hole groove 241. At this time, the locking pin shaft 31 will automatically extend under the action of the second return spring 33. However, under the action of the limiting pin 32, the groove at the bottom of the locking pin shaft 31 will be slightly tightly fitted in the second limiting hole groove 241, thus safely lifting the workpiece. If the pin body 20 is not extended into place due to improper operation, the groove at the bottom of the locking pin shaft 31 cannot enter the second limiting hole groove 241, thus failing to lock the pin body 20. In this case, under the action of the first return spring 21, the pin body 20 will automatically retract, thus failing to lift the workpiece. This fundamentally prevents the workpiece from being lifted before the hook is in place, thus preventing the workpiece from falling out of the air.

[0033] When unhooking is required, first press the locking pin 31 to disengage the groove at its bottom from the second limiting hole 241. Then, the pin body 20 will automatically retract under the action of the first return spring 21, thus completing the unhooking. When the workpiece is lifted in the air, if the locking pin 31 is accidentally pressed, the anti-disengagement groove 23 will be stuck on the lifting lug of the workpiece, preventing the pin body 20 from retracting and thus preventing safety hazards caused by accidental operation.

[0034] The beneficial effects of this invention are: the anti-detachment hook is more convenient and quick to hook and detach. Hooking and detachment can be completed by a push-press action when the hook is not under force. Moreover, its pin-type fixing form is more compatible with the plate hole type lifting lug, and is more suitable for production occasions with short cycle time and high automation rate.

[0035] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A quick-release plate-hole type lifting lug anti-detachment hook, characterized in that, include: Lifting lug fork block, load-bearing pin and locking pin; The lifting lug block includes a connecting part and a guiding part. One end of the connecting part is for connecting with external lifting equipment, and the other end of the connecting part has a fork with a bifurcated structure for inserting the workpiece to be lifted. The guiding part is hollow and is fixedly connected to and communicates with the fork. The load-bearing pin includes a pin body, which has at least two working positions relative to the lifting lug block. In the first working position, the pin body is inserted into the guide portion, and in the second working position, the pin body is inserted into both the guide portion and the fork opening. The locking pin includes a locking pin shaft, which can be inserted into the guide portion and the pin body, so that the pin body can be selectively locked in the first working position or the second working position. The load-bearing pin also includes a first return spring and a button cover. The first return spring is a compression spring, which is sleeved on the first section of the pin body, and its two ends elastically abut against the first section of the pin body and the fork, respectively. The button cover is positioned and inserted into the first limiting hole groove. The second section of the pin body is provided with a first limiting hole groove, a second limiting hole groove, and a third limiting hole groove in sequence along its length. The locking pin also includes a locking pin seat, which is a hollow structure and sleeved on the other end of the guide portion. The locking pin shaft passes through the inner cavity of the locking pin seat and, after passing through the mounting hole, can be selectively inserted into the second or third limiting hole groove. The bottom of the locking pin shaft is provided with a groove, the outer diameter of which is larger than the width of the third limiting hole groove and slightly smaller than the diameter of the second limiting hole groove. The locking pin also includes a limiting pin and a second return spring. The locking pin seat is also provided with a through hole for the limiting pin to pass through. The second return spring is disposed between the groove at the bottom of the locking pin shaft and the inner cavity of the locking pin seat, providing elastic return force for the locking pin shaft.

2. The anti-detachment hook for a plate-hole type lifting lug with quick hooking and unhooking as described in claim 1, characterized in that, The guide part is a hollow straight tube. One shaft end of the guide part is fixedly connected to and communicates with the fork opening. The other shaft end of the guide part is provided with a mounting hole for the locking pin to pass through and install. The fork opening is provided with a pin hole.

3. The anti-detachment hook for a plate-hole type lifting lug with quick hooking and unhooking as described in claim 1, characterized in that, A hanging hole is provided on one end of the connecting part.

4. The anti-detachment hook for a plate-hole type lifting lug with quick hooking and unhooking as described in claim 2, characterized in that, The main body of the pin is long and is divided into two sections along its length. The first section of the main body of the pin can be inserted into the fork and the pin hole.

5. The anti-detachment hook for a plate-hole type lifting lug with quick-attachment and detachment capability as described in claim 4, characterized in that, Both the first and second limiting slots are circular slots. The axis of the first limiting slot is perpendicular to the axis of the second limiting slot. The third limiting slot extends along the axial direction of the pin body and has a strip-shaped hole structure in cross-section.

6. The anti-detachment hook for a plate-hole type lifting lug with quick hooking and unhooking as described in claim 4, characterized in that, The first section of the pin body has an anti-detachment groove.

7. The anti-detachment hook for a plate-hole type lifting lug with quick hooking and unhooking as described in claim 1, characterized in that, The upper part of the locking pin shaft is provided with a limiting slot extending along its length direction. The limiting pin passes through the through hole and the limiting slot, thereby limiting and guiding the stroke of the locking pin shaft.

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