CN214359769U

CN214359769U - Automatic unhooking device and hoisting equipment

Info

Publication number: CN214359769U
Application number: CN202120218045.1U
Authority: CN
Inventors: 闫志伟; 者中林; 闫晨阳; 王林伟; 张建军
Original assignee: Shanxi Double Ring Heavy Industry Group Co ltd
Current assignee: Shanxi Double Ring Heavy Industry Group Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-10-08
Anticipated expiration: 2031-01-26

Abstract

The utility model provides an automatic unhook device and hoisting equipment, automatic unhook device includes: the first hooking component comprises a first sliding part and a connecting part; the second hooking component comprises a second sliding part, a fixing part and a sliding part; and at least one lock assembly including a housing, a bolt and an elastic member. During the use, the first even subassembly that colludes links to each other with hoisting apparatus's jib loading boom, and the second colludes even subassembly and links to each other with the heavy object, and the lock subassembly then colludes even subassembly with the second with first even subassembly and colludes even subassembly and be connected or the disconnection, and connect and the disconnection only need can accomplish through the lift of control jib loading boom. The operation personnel can complete the hooking and unhooking operation without approaching the automatic unhooking device, the labor intensity is low, and the operation is safer.

Description

Automatic unhooking device and hoisting equipment

Technical Field

The utility model relates to a jack-up hoist and mount field especially relates to an automatic unhook device and hoisting equipment.

Background

In the hoisting operation, the hoisting equipment needs to hook the heavy object first to hoist the heavy object. After the operator transfers the weight to a certain position by using the hoisting device, the connection between the hoisting device and the weight needs to be released so as to continuously hoist and take off the next weight.

At present, most hoisting operations all need operating personnel to be close to the hoist and carry out the couple or unhook operation, and not only intensity of labour is big, has certain potential safety hazard moreover.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the operation personnel are close to the lifting appliance to hook or unhook the hook, the labor intensity is high, and the problem of certain potential safety hazard exists, one of the purposes of the utility model is to provide an automatic unhooking device.

The utility model provides a following technical scheme:

an automatic unhooking device is applied to hoisting equipment, and comprises:

the first hooking component comprises a first sliding part and a connecting part, and the connecting part is connected with the first sliding part;

the second hooking component comprises a second sliding part, a fixing part and a sliding part, the second sliding part is in sliding fit with the first sliding part along a first direction, the fixing part is fixedly connected with the second sliding part, the fixing part is positioned above the sliding part, the sliding part is arranged on the second sliding part in a sliding mode along the first direction, a first inclined surface is arranged on the lower surface of the sliding part, and the maximum distance between the upper surface of the sliding part and the second sliding part is larger than the maximum distance between the surface of the fixing part and the second sliding part; and

at least one lock subassembly, the lock subassembly is including lock shell, spring bolt and elastic component, the lock shell with the connecting piece links to each other, the spring bolt slides and sets up in the lock shell, just the glide direction of spring bolt is directional the second slider, the spring bolt orientation the lower surface of second slider one end is equipped with the second inclined plane, the elastic component orders about the spring bolt orientation the second slider slides.

As right automatic unhooking device's further optional scheme, the lock subassembly still includes the adjusting screw, the axis of adjusting screw is directional the second slider, the adjusting screw with the lock shell dorsad the one end screw-thread fit of second slider, be equipped with the push pedal on the spring bolt, the push pedal is located the adjusting screw with between the second slider, the elastic component is the pressure spring, the one end of elastic component with the adjusting screw offsets, the other end of elastic component with the push pedal offsets.

As right automatic unhooking device's further optional scheme, the spring bolt orientation the one end of second slider sets up to the cuboid form, and with lock shell sliding fit, the spring bolt dorsad the one end of second slider sets up to cylindric, the spring bolt dorsad the one end of second slider with adjustment screw sliding fit and normal running fit, the axis of adjustment screw with the axis coincidence of spring bolt.

As a further alternative to the automatic unhooking device, the lock assemblies are provided in pairs on both sides of the second slider.

As a further optional scheme for the automatic unhooking device, the second hooking component further includes a limiting member, the limiting member is fixedly connected to the second sliding member, the limiting member is located below the sliding member, and the limiting member is used for limiting a sliding stroke of the sliding member.

As a further optional scheme of the automatic unhooking device, a groove is formed in one side, facing the sliding piece, of the fixing piece, and a convex block is correspondingly formed in one side, facing the fixing piece, of the sliding piece.

As a further optional scheme of the automatic unhooking device, the first sliding part is cylindrical, the first sliding part is arranged along the first direction, the second sliding part is cylindrical, and the second sliding part is in sliding insertion fit with the first sliding part.

As a further alternative to the automatic unhooking device, the fixed part is disposed around the second sliding part, and the sliding part is disposed around the second sliding part.

Another object of the present invention is to provide a hoisting device.

The utility model provides a following technical scheme:

a hoisting device comprises the automatic unhooking device and a hoisting arm, wherein a lifting lug is arranged at the top end of the first sliding part and is connected with the hoisting arm, and the second sliding part is used for being connected with a heavy object.

As a further alternative to the hoisting device, a coupling plate is provided on the first sliding member, and a coupling hole is provided on the coupling plate.

The embodiment of the utility model has the following beneficial effect:

in use, the first slider is connected to a boom of a lifting apparatus and the second slider is connected to a weight. The operator controls the crane boom to put down the first sliding part, and the lock assembly moves down along with the first sliding part until the second inclined surface on the lock tongue is contacted with the fixed part. At the moment, the counterforce exerted on the lock tongue by the fixing piece inclines upwards, and the component force of the counterforce along the horizontal direction drives the lock tongue to move back to the second sliding piece, so that the lock tongue cannot be stopped by the fixing piece when moving downwards.

After the bolt passes through the fixing part downwards, the elastic part ejects the bolt, so that the upper surface of the bolt is partially overlapped with the lower surface of the fixing part. At this time, the operator controls the boom to lift the first slider, and the first slider can lift the second slider upward through the lock tongue and the fixing member, thereby lifting the heavy object.

When unhooking is needed, an operator controls the crane arm to put down the first sliding part, and the lock assembly moves downwards along with the first sliding part until the lock tongue presses on the sliding part at the lowest position. At the moment, the second inclined plane on the lock tongue is contacted with the sliding piece, the reaction force applied to the lock tongue by the sliding piece inclines upwards, and the component force of the reaction force along the horizontal direction drives the lock tongue to move back to the second sliding piece, so that the lock tongue cannot be stopped by the sliding piece when moving downwards.

After the spring bolt passes through the top end of the first inclined plane on the sliding piece downwards, the elastic piece gradually pops up the spring bolt, and the spring bolt exerts an upward oblique force on the sliding piece through the first inclined plane, so that the sliding piece gradually rises. At the moment, the operator controls the crane boom to lift the first sliding part and drive the lock tongue to upwards support the sliding part. The spring bolt still offsets with the first inclined plane on the sliding piece to drive the sliding piece to move upwards, until the sliding piece offsets with the mounting.

Because the sliding piece is stopped by the fixing piece, the reaction force applied to the lock tongue by the sliding piece is enough to overcome the elastic force of the elastic piece, so that the lock tongue moves back to the second sliding piece until the lock tongue moves to the top end of the sliding piece, and the maximum distance between the upper surface of the sliding piece and the second sliding piece is greater than the maximum distance between the surface of the fixing piece and the second sliding piece, therefore, the lock tongue can smoothly cross the fixing piece after crossing the sliding piece. At the moment, the first sliding part and the second sliding part do not bear force along the length direction of the first sliding part and the second sliding part, and unhooking action is completed.

The operation personnel can complete the hooking and unhooking operation without approaching the automatic unhooking device, the labor intensity is low, and the operation is safer.

In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view showing an overall structure of an automatic unhooking device provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram illustrating a lock assembly in an automatic unhooking device according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of an automatic unhooking device provided in embodiment 1 of the present invention during an unhooking process;

fig. 4 is a schematic structural diagram of an automatic unhooking device provided in embodiment 1 of the present invention after unhooking;

fig. 5 is a schematic view showing an overall structure of an automatic unhooking device provided in embodiment 2 of the present invention;

fig. 6 is a schematic structural diagram illustrating a lock assembly in an automatic unhooking device according to embodiment 2 of the present invention;

fig. 7 is a schematic structural diagram of an automatic unhooking device provided in embodiment 2 of the present invention during an unhooking process;

fig. 8 shows a schematic structural diagram of an automatic unhooking device provided in embodiment 2 of the present invention after unhooking.

Description of the main element symbols:

100-a first hooking component; 110-a first slide; 120-a connector; 130-a lifting lug; 140-a coupling plate; 200-a second hooking component; 210-a second slide; 220-a fixture; 221-grooves; 230-a glide; 231-a bump; 240-a limiter; 300-a lock assembly; 310-a lock case; 320-a bolt; 321-a push plate; 330-an elastic member; 340-adjusting screws.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1 to 4, the present embodiment provides an automatic unhooking device for a hoisting apparatus. The automatic unhooking device comprises a first hooking component 100, a second hooking component 200 and at least one lock component 300, wherein the first hooking component 100 is connected with a crane boom of the hoisting equipment, the second hooking component 200 is connected with a heavy object, and the lock component 300 is used for connecting or disconnecting the first hooking component 100 and the second hooking component 200.

Specifically, the first hooking component 100 is composed of a first sliding member 110 and a connecting member 120. The first sliding member 110 is bar-shaped and disposed along a first direction, and the first direction is a vertical direction. The top end of the first sliding member 110 is connected to a boom of a lifting apparatus, the connecting member 120 is disposed at the bottom end of the first sliding member 110, and the top end of the connecting member 120 is welded or bolted to the first sliding member 110.

Specifically, the second hooking component 200 is composed of a second sliding component 210, a fixed component 220 and a sliding component 230. The second sliding member 210 is bar-shaped and is disposed along a vertical direction, and a bottom end of the second sliding member 210 is connected to a weight.

The second slider 210 and the first slider 110 are slidably engaged in a vertical direction without translational freedom in any horizontal direction. For example, a vertical sliding slot is formed on a side wall of the first sliding member 110, a width of a slot opening of the sliding slot is smaller than a width of a slot bottom, and a sliding block is correspondingly disposed on a side wall of the second sliding member 210. The cross sections of the sliding groove and the sliding block can be arranged into a dovetail shape or a T shape.

The fixing member 220 is fixed on the sidewall of the second sliding member 210 by welding or bolting, and the upper surface of the fixing member is provided with a third inclined surface facing away from the second sliding member 210.

The sliding member 230 is located below the fixed member 220 and is slidably disposed on a sidewall of the second sliding member 210 in a vertical direction. The lower surface of the sliding member 230 is provided with a first inclined surface, and the first inclined surface faces away from the second sliding member 210. In addition, the maximum distance between the upper surface of the sliding member 230 and the second sliding member 210 is greater than the maximum distance between the surface of the fixed member 220 and the second sliding member 210.

Specifically, the lock assembly 300 is comprised of a housing 310, a bolt 320, and an elastic member 330. Wherein the lock case 310 has a cylindrical shape, and an axis of the lock case 310 is directed toward the second slider 210. The lock housing 310 is disposed through the bottom of the connecting member 120, completely below the first sliding member 110, and is fixed to the connecting member 120 by welding, screwing, or the like.

The locking tongue 320 is slidably disposed in the lock case 310 along the axial direction of the lock case 310, and a lower surface of one end of the locking tongue 320 facing the second sliding member 210 is provided with a second inclined surface facing the second sliding member 210.

The elastic member 330 is disposed in the lock case 310 to urge the latch tongue 320 to move toward the second slider 210.

In use, the first slide 110 is attached to the boom of a lifting apparatus and the second slide 210 is secured to a weight. The operator controls the lift arm to lower the first slide 110, and the lock assembly 300 moves downward until the second inclined surface of the locking tongue 320 contacts the third inclined surface of the fixing member 220. At this time, the reaction force applied to the locking tongue 320 by the third inclined surface is inclined upward, and the component force of the reaction force in the horizontal direction drives the locking tongue 320 to move away from the second sliding member 210, so that the locking tongue 320 is not stopped by the fixing member 220 when moving downward.

After the locking tongue 320 passes downward over the fixing member 220, the elastic member 330 ejects the locking tongue 320 so that the upper surface of the locking tongue 320 partially overlaps the lower surface of the fixing member 220. At this time, the worker controls the boom to lift the first slider 110, and the first slider 110 can lift the second slider 210 upward through the locking tongue 320 and the fixing member 220, thereby lifting the heavy object.

After the weight is transferred to the destination, the operator controls the boom to lower the first slide 110, and the lock assembly 300 moves down until the latch tongue 320 presses on the slide 230 at the lowest position. At this time, the second inclined surface on the locking tongue 320 contacts with the sliding member 230, and the reaction force applied by the sliding member 230 to the locking tongue 320 is inclined upwards, and the component force of the reaction force in the horizontal direction drives the locking tongue 320 to move away from the second sliding member 230, so that the locking tongue 320 is not stopped by the sliding member 230 when moving downwards.

After the latch tongue 320 passes downward over the top of the first inclined surface of the sliding member 230, the elastic member 330 gradually ejects the latch tongue 320, and the latch tongue 320 applies an upward force to the sliding member 230 through the first inclined surface, so that the sliding member 230 gradually rises. At this time, the operator controls the boom to lift the first sliding member 110, and the latch 320 is driven to lift the sliding member 230. The latch tongue 320 still abuts against the first inclined surface of the sliding member 230, and drives the sliding member 230 to move upwards until the sliding member 230 abuts against the fixing member 220.

Since the sliding member 230 is stopped by the fixed member 220, the reaction force applied by the sliding member 230 to the locking tongue 320 is enough to overcome the elastic force of the elastic member 330, so that the locking tongue 320 moves away from the second sliding member 210 until the locking tongue 320 moves to the top end of the sliding member 230. Since the maximum distance between the upper surface of the sliding member 230 and the second sliding member 210 is greater than the maximum distance between the surface of the fixed member 220 and the second sliding member 210, the latch 320 can smoothly pass over the fixed member 220 after passing over the sliding member 230. At this time, the first slider 110 and the second slider 210 do not bear force along the length direction thereof any more, and the unhooking action is completed.

In the process, the operation of hooking and unhooking can be completed without approaching the automatic unhooking device by operating personnel, so that the labor intensity is low, and the operation is safer.

Example 2

Referring to fig. 5 to 8, the present embodiment provides an automatic unhooking device for a hoisting apparatus. The automatic unhooking device comprises a first hooking component 100, a second hooking component 200 and two lock components 300, wherein the first hooking component 100 is connected with a crane boom of the hoisting equipment, the second hooking component 200 is connected with a heavy object, and the two lock components 300 are used for connecting or disconnecting the first hooking component 100 and the second hooking component 200.

Specifically, the first hooking component 100 is composed of a first sliding member 110 and a connecting member 120. The first sliding member 110 is cylindrical, two ends of the first sliding member are through, and the first sliding member 110 is disposed along a first direction. In this embodiment, the first direction is a vertical direction. A lifting lug 130 is welded at the top end of the outer side wall of the first sliding part 110, and is connected with a lifting arm of the lifting equipment through the lifting lug 130.

In addition, a coupling plate 140 is welded to the top of the outer sidewall of the first slider 110. The coupling plate 140 is vertically disposed, and an upper surface of the coupling plate 140 is abutted against a lower surface of the shackle 130. The connecting plate 140 is provided with a connecting hole, and a bolt, a chain, a rope and other structures can be inserted into the connecting hole to connect the first sliding member 110 with other structures, so that the first sliding member 110 has more various functions.

The connecting member 120 is also provided in a cylindrical shape, consisting of a top surface and a side surface. The axis of the link 120 coincides with the axis of the first slider 110, and the inner diameter of the link 120 is larger than the outer diameter of the first slider 110. The bottom end of the first sliding member 110 penetrates into the top surface of the connecting member 120, the end surface of the bottom end of the first sliding member 110 is flush with the top surface of the inner wall of the connecting member 120, and the first sliding member 110 and the connecting member 120 are fixed by welding.

Specifically, the second hooking component 200 is composed of a second sliding component 210, a fixing component 220, a sliding component 230 and a limiting component 240. The second sliding member 210 is cylindrical, and the bottom end of the second sliding member 210 is connected to a weight.

The axis of the second sliding part 210 coincides with the axis of the first sliding part 110, and the diameter of the second sliding part 210 is equal to the inner diameter of the first sliding part 110, and the two are in sliding insertion fit along the vertical direction. At this time, the second slider 210 and the first slider 110 do not have a translational degree of freedom in any horizontal direction, but have a rotational degree of freedom.

The fixing member 220 is disposed around the second sliding member 210 and welded to a sidewall of the second sliding member 210. The upper surface of the fixing member 220 is provided with a third inclined surface, the third inclined surface faces away from the second sliding member 210, and the fixing member 220 is in a conical structure with a small top and a large bottom.

The sliding member 230 is located below the fixed member 220, is also disposed around the second sliding member 210, and is slidably disposed on a side wall of the second sliding member 210 in a vertical direction. The lower surface of the sliding member 230 is provided with a first inclined surface, and the first inclined surface faces away from the second sliding member 210. The upper part of the sliding member 230 has a conical structure with a large top and a small bottom, and the lower part is cylindrical.

In addition, the outer diameter of the top end of the sliding member 230 is slightly larger than the outer diameter of the bottom end of the fixing member 220 and slightly smaller than the inner diameter of the connecting member 120. When the sliding member 230 and the fixed member 220 slide with the second sliding member 210 relative to the first sliding member 110, both the sliding member 230 and the fixed member 220 can slide into the connecting member 120.

The limiting member 240 is annular, and is sleeved on the second sliding member 210 and welded to the sidewall of the second sliding member 210, and the limiting member 240 is located below the sliding member 230. The sliding range of the sliding member 230 is the area between the limiting member 240 and the fixing member 220.

Specifically, two lock assemblies 300 are symmetrically disposed about the axis of the second slider 210, and each of the two lock assemblies 300 is composed of a lock case 310, a locking tongue 320, an elastic member 330, and an adjustment screw 340.

The lock case 310 has a cylindrical shape, and the lock case 310 is disposed along a radial direction of the second slider 210. An end of the lock case 310 facing the second slider 210 penetrates the bottom of the link 120 and is welded to the link 120.

The bolt 320 is divided into a rectangular parallelepiped section and a cylindrical section, and the axis of the rectangular parallelepiped section coincides with the axis of the cylindrical section and coincides with the axis of the lock case 310. The height of cuboid section equals the diameter of cylinder section, and the cuboid section is located between cylinder section and second slider 210, and cuboid section and cylinder section integrated into one piece.

The end of the lock case 310 facing the second sliding member 210 has an end surface, and a through hole having a rectangular cross section is formed in the middle of the end surface. The rectangular parallelepiped section of the latch tongue 320 passes through the through hole and is in sliding fit with the inner wall of the through hole.

In addition, a second inclined surface is disposed on a lower surface of the lock tongue 320 facing the second sliding member 210, and the second inclined surface faces the second sliding member 210, that is, an end of the lock tongue 320 facing the second sliding member 210 is disposed in a wedge shape.

The axis of the adjusting screw 340 coincides with the axis of the lock case 310, and the adjusting screw 340 is threadedly engaged with an end of the lock case 310 facing away from the second sliding member 210. The adjusting screw 340 is provided with a circular hole, the axis of the circular hole coincides with the axis of the adjusting screw 340, and the inner diameter of the circular hole is equal to the diameter of the cylindrical section of the locking tongue 320. The cylindrical section of the locking tongue 320 is slidably engaged with the circular hole and can freely rotate in the circular hole, so that when the adjusting screw 340 is screwed, the adjusting screw 340 can move along the axis direction of the lock case 310 without being obstructed by the locking tongue 320.

The elastic member 330 is a compression spring, and is disposed in the lock housing 310 and sleeved on the cylindrical section of the locking tongue 320. Correspondingly, a push plate 321 is sleeved on the latch tongue 320, and the push plate 321 is located in the lock case 310 and is welded and fixed with the side wall of the latch tongue 320.

One end of the elastic element 330 abuts against the push plate 321, and the other end of the elastic element 330 abuts against the adjusting screw 340, so as to drive the locking tongue 320 to move towards the second sliding member 210. When the adjusting screw 340 is screwed into the lock case 310, the elastic force of the elastic member 330 can be increased. The elastic force of the elastic member 330 can be reduced when the adjustment screw 340 is unscrewed from the lock case 310.

The working process of the embodiment is the same as that of the embodiment 1, and similarly, an operator can complete hooking and unhooking operations without approaching the automatic unhooking device, so that the labor intensity is low, and the operation is safer.

Further, an annular groove 221 is formed on the inner edge of the lower surface of the fixing member 220, an annular protrusion 231 is correspondingly formed on the inner edge of the upper surface of the sliding member 230, and the protrusion 231 and the sliding member 230 are integrally formed. When the sliding member 230 slides up to abut against the fixing member 220, the protrusion 231 is embedded in the groove 221, so that the sliding member 230 and the fixing member 220 are more stably engaged.

The present embodiment also provides a lifting apparatus comprising the above-mentioned automatic unhooking device and a lifting arm, wherein the first sliding member 110 of the automatic unhooking device is connected with the lifting arm through the lifting lug 130. Specifically, the boom may be provided with a hook, and the hook hooks the lifting lug 130, or the boom may be provided with a rope, and the bottom end of the rope is tied to the lifting lug 130.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. An automatic unhooking device is applied to hoisting equipment, characterized in that, automatic unhooking device includes:

2. The automatic unhooking device of claim 1, wherein the lock assembly further comprises an adjusting screw, an axial line of the adjusting screw points to the second sliding part, the adjusting screw is in threaded fit with one end of the lock shell, which faces away from the second sliding part, a push plate is arranged on the lock tongue, the push plate is located between the adjusting screw and the second sliding part, the elastic part is a pressure spring, one end of the elastic part abuts against the adjusting screw, and the other end of the elastic part abuts against the push plate.

3. The automatic unhooking device of claim 2, wherein one end of the lock tongue facing the second sliding member is rectangular and is in sliding fit with the lock case, one end of the lock tongue facing away from the second sliding member is cylindrical, one end of the lock tongue facing away from the second sliding member is in sliding fit and rotating fit with the adjusting screw, and the axis of the adjusting screw coincides with the axis of the lock tongue.

4. The automatic unhooking apparatus according to claim 1, wherein said lock assemblies are provided in pairs on both sides of said second slider.

5. The automatic unhooking device according to claim 1, wherein the second hooking component further comprises a limiting member, the limiting member is fixedly connected with the second sliding member, the limiting member is located below the sliding member, and the limiting member is used for limiting the sliding stroke of the sliding member.

6. The automatic unhooking device of claim 1, wherein a groove is formed on one side of the fixing member facing the sliding member, and a projection is correspondingly formed on one side of the sliding member facing the fixing member.

7. The automatic unhooking device according to claim 1, wherein the first sliding member is cylindrical and is disposed along the first direction, and the second sliding member is cylindrical and is slidably fitted with the first sliding member.

8. The automatic unhooking apparatus according to claim 7, wherein said fixed member is disposed around said second slide member, and said sliding member is disposed around said second slide member.

9. Hoisting device, characterized in that it comprises a self-unhooking apparatus according to any of claims 1-8 and a boom, the top end of the first slide being provided with a lifting lug, which is connected to the boom, and the second slide being adapted to be connected to a weight.

10. The hoisting device of claim 9, wherein the first slide member is provided with a coupling plate, the coupling plate being provided with a coupling hole.