Hoisting accessory and engineering machinery

Abstract

The invention relates to the technical field of hoisting accessories, and discloses a hoisting accessory and engineering machinery, the hoisting accessory is provided with an unhooking structure, the unhooking structure comprises: a housing provided with a vertical chute; the lifting hook comprises a hook part, a hinging part and a swinging part, and the hinging part is hinged to the shell; the first end of the self-locking connecting rod is hinged into the vertical sliding groove and can move up and down along the vertical sliding groove, and the second end of the self-locking connecting rod is hinged to the swing part; the elastic piece is connected with the first end of the self-locking connecting rod and used for applying downward force to the second end of the self-locking connecting rod; the hinge point between the second end of the self-locking connecting rod and the swing part, the hinge point between the hinge part and the shell and the vertical center line of the vertical sliding groove can be located on the same plumb line when the hoisting accessory is suspended, so that the unhooking structure has the mechanical dead point position. According to the hoisting accessory and the engineering machinery, automatic unhooking operation is carried out by arranging the unhooking structure, and the purpose of improving operation safety is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of lifting accessories, and specifically relates to a lifting accessory and an engineering machine. Background Art

[0002] Telescopic forklifts are a type of multifunctional engineering machinery widely used in the fields of construction, logistics, energy, ports, etc. In order to adapt to various complex working conditions, telescopic forklifts are usually equipped with a variety of attachments to complete operations such as lifting, handling, loading and unloading. Among them, lifting attachments are one of the most common functional attachments, which are mainly used for lifting and transferring materials. However, when performing lifting operations, existing hook attachments usually require manual participation in hooking and unhooking operations. The operator needs to leave the cab to manually complete the hooking, then return to the cab for lifting operations, and then leave the cab again to manually complete the unhooking operation. During the lifting operation, the operator needs to approach the lifting area or enter the working range of the lifting equipment to complete the hooking and unhooking operations, which increases the risk of the operator being injured by falling objects or mechanical misoperation, especially when lifting large heavy objects or dangerous goods, the safety hazards are more obvious. Summary of the invention

[0003] The purpose of this application is to provide a lifting attachment and engineering machinery to achieve the purpose of improving operation safety.

[0004] In order to achieve the above-mentioned purpose, the present application provides a lifting attachment having a decoupling structure, the decoupling structure comprising:

[0005] The housing is provided with a vertical slide groove extending in the vertical direction;

[0006] The hook comprises a hook portion, a hinge portion and a swing portion which are sequentially connected from bottom to top, wherein the hinge portion is hinged to the housing;

[0007] A self-locking connecting rod, wherein the first end of the self-locking connecting rod is hinged in the vertical slide groove and can move up and down along the vertical slide groove, and the second end of the self-locking connecting rod is hinged to the swinging part;

[0008] an elastic member, wherein a first end of the elastic member is connected to the housing, and a second end of the elastic member is connected to the first end of the self-locking connecting rod, so as to apply a downward force to the second end of the self-locking connecting rod;

[0009] Among them, the hinge point between the second end of the self-locking link and the swing part, the hinge point between the hinge part and the shell, and the vertical center line of the vertical slide groove can be located on the same plumb line when the lifting attachment is suspended, so that the hook has a mechanical dead point position, and the elastic member can drive the first end of the self-locking link to move downward along the vertical slide groove when the hook is located at a non-mechanical dead point position.

[0010] In some specific embodiments, the lower end of the shell extends downward and forms an anti-detachment portion. When the unhooking structure is located at a mechanical dead point, the anti-detachment portion is buckled on the hook mouth of the hook portion to form a closed hanging ring structure with the hook portion.

[0011] In some specific embodiments, a first limiting member is provided on the anti-detachment portion, and when the unhooking structure is located at a mechanical dead point, an outer peripheral wall of the end hook head of the hook portion abuts against the first limiting member for limiting position.

[0012] In some specific embodiments, a second limiting member is provided on the shell, and the hook portion is located between the anti-slip portion and the second limiting member. When the outer peripheral wall of the upper hook body of the hook portion abuts against the second limiting member, the hook mouth of the hook portion is arranged horizontally or slightly upward.

[0013] In some specific embodiments, the shell further includes a hanging portion located above the vertical slide groove.

[0014] In some specific embodiments, the lifting attachment may further include:

[0015] A main frame, one end of which is provided with an interface structure for connecting with engineering machinery;

[0016] A shackle, the upper end of which is hinged to the main frame, and the lower end of which is connected to the hoisting part.

[0017] In some specific embodiments, the lifting part includes a lifting hole that is buckled with the lower end of the shackle, and the center line of the lifting hole, the center line of the hinge axis between the upper end of the shackle and the main frame, the center line of the hinge axis between the first end of the self-locking link and the vertical slide groove, the center line of the hinge axis between the second end of the self-locking link and the swinging part, and the center line of the hinge axis between the hinged part and the shell are parallel to each other.

[0018] In some specific embodiments, the shell also includes a main body connected below the lifting part, the main body includes two shell side walls arranged at intervals and a clamping cavity clamped between the two shell side walls, the self-locking connecting rod, the elastic member, the hinge part and the swinging part are respectively accommodated in the clamping cavity, the two shell side walls are respectively provided with the vertical sliding grooves, the self-locking connecting rod is respectively hinged to the two vertical sliding grooves through the sliding rod shaft, and the hinge part is respectively hinged to the two shell side walls through the hook rotating shaft.

[0019] In some specific embodiments, the elastic member is a spring, a first end of the elastic member is hinged to the shell, a second end of the elastic member is hinged to the first end of the self-locking link, and a hinge point between the first end of the elastic member and the shell is located below a hinge point between the second end of the elastic member and the first end of the self-locking link.

[0020] A second aspect of the present application provides an engineering machine, which includes the above-mentioned lifting accessories.

[0021] Through the above technical solution, when the heavy object is ready to be lifted, the lifting attachment can be swung, the hook rotates relative to the shell, and the self-locking connecting rod can make the unhooking structure disengage from the mechanical dead point position under the action of the elastic member to achieve unlocking. When the hook is hooked on the heavy object and lifted, the hook can restore the unhooking structure to the mechanical dead point position under the action of the gravity of the heavy object to lock it. In addition, when the heavy object needs to be released, the lifting attachment can be swung, the hook rotates relative to the shell, and the self-locking connecting rod can make the unhooking structure disengage from the mechanical dead point position under the action of the elastic member to achieve unlocking, so that the hook can reach the position where the heavy object is unhooked, thereby achieving automatic unhooking operation without manual unhooking, which not only improves the efficiency of the telescopic arm forklift in the lifting operation, reduces the safety risks of manual participation, but also improves the safety and operation convenience of the equipment. In addition, the automatic unhooking structure of the lifting attachment is based on mechanical principles, avoids the use of complex electrical or hydraulic systems, and reduces manufacturing costs and maintenance difficulties.

[0022] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0024] Figure 1 A schematic diagram of the installation of a lifting attachment and a telescopic forklift arm head according to a specific embodiment of the present application is shown;

[0025] Figure 2 for Figure 1 Exploded diagram of the installation structure of the lifting attachment and the boom head of the telescopic forklift;

[0026] Figure 3 for Figure 1 A cross-sectional view of a lifting attachment in FIG. 1 , wherein the unhooking structure is located at a mechanical dead point;

[0027] Figure 4 for Figure 1 A cross-sectional view of a lifting attachment in which the unhooking structure is located at a non-mechanical dead point.

[0028] Description of Reference Numerals

[0029] 1Main frame 11Interface structure

[0030] 12 shackle holes 2 shackles

[0031] 21 Shackle screw 3 housing

[0032] 31 vertical slide 32 anti-slip part

[0033] 33 first limiter 34 second limiter

[0034] 35 lifting holes 4 hooks

[0035] 5 self-locking connecting rod 6 elastic part

[0036] 7 Spring fixed shaft 8 Sliding rod shaft

[0037] 9 connecting rod shaft 10 hook shaft

[0038] 100 arm head quick change connection device DETAILED DESCRIPTION

[0039] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0040] Telescopic forklifts are usually designed for single-person operation. Traditional lifting requires additional manual cooperation to complete the unhooking operation when unloading at high altitude. The manual unhooking operation takes extra time, increases the complexity of the operation, greatly limits the operating efficiency of the forklift, and violates the original design intention of the equipment to be convenient, efficient and safe.

[0041] In view of this, the first aspect of the present application provides a novel lifting attachment, which is provided with a decoupling structure, and the decoupling structure includes a housing 3, a hook 4, a self-locking connecting rod 5 and an elastic member 6. The housing 3 is provided with a vertical slide 31 extending in the vertical direction, and the hook 4 includes a hook portion, a hinge portion and a swing portion connected in sequence from bottom to top, and the hinge portion is hinged to the housing 3. The first end of the self-locking connecting rod 5 is hinged in the vertical slide 31 and can move up and down along the vertical slide 31, and the second end of the self-locking connecting rod 5 is hinged to the swing portion. The first end of the elastic member 6 is connected to the housing 3, and the second end of the elastic member 6 is connected to the first end of the self-locking connecting rod 5, so as to apply a downward force to the second end of the self-locking connecting rod 5. Among them, the hinge point between the second end of the self-locking connecting rod 5 and the swing portion, the hinge point between the hinge portion and the housing 3, and the vertical center line of the vertical slide 31 can be located on the same plumb line when the lifting attachment is suspended, so that the decoupling structure has a mechanical dead point position. When the unhooking structure is located at a non-mechanical dead point position, the elastic member 6 can drive the first end of the self-locking connecting rod 5 to move downward along the vertical sliding groove 31 .

[0042] like Figure 3 and Figure 4 As shown, when the lifting attachment is suspended, the vertical center line of the vertical slot 31 is arranged along the plumb line. Due to the guiding effect of the vertical slot 31, the first end of the self-locking connecting rod 5 can only make vertical linear motion along the vertical slot 31. The self-locking connecting rod 5 is in the shape of a straight rod, and the first end of the self-locking connecting rod 5 is hinged in the vertical slot 31, that is, the first end of the self-locking connecting rod 5 is rotatably connected to the vertical slot 31, and the second end of the self-locking connecting rod 5 can make a swinging motion. The hook 4 is in the shape of an inverted question mark, and the hinged portion of the hook 4 is hinged to the housing 3 through the hook shaft 10, that is, the hook 4 can rotate around the hinge point between the hinged portion and the housing 3. The swinging portion is located at the upper end of the hook 4, and is hinged to the second end of the self-locking connecting rod 5 through the connecting rod shaft 9.

[0043] When the lifting attachment is suspended, and the vertical center line of the vertical slide 31, the two hinge points of the first and second ends of the self-locking link 5, and the two hinge points on the hinge and the swing part are located on the same plumb line, the unhooking structure is located at the mechanical dead point position. At this time, even if the elastic member 6 applies a downward force to the second end of the self-locking link 5, the self-locking link 5 and the hook 4 will not move, that is, the unhooking structure is in a locked state. When the hook 4 swings, the swing part drives the second end of the self-locking link 5 to swing. At this time, the unhooking structure is out of the mechanical dead point position. Under the action of the downward force applied by the elastic member 6, the first end of the self-locking link 5 moves downward along the vertical slide 31, and the second end of the self-locking link 5 swings accordingly, thereby driving the swing part to swing, and the hook 4 rotates around the hinge, so that the hook mouth of the bent hook part rotates downward, thereby achieving the purpose of automatic unhooking.

[0044] Specifically, Figure 3 and Figure 4As shown, during the lifting process, the hook sleeve connected to the heavy object is hung on the hook mouth of the hook 4 in the unlocked state, and the entire lifting attachment is lifted by the boom. In the process of lifting the heavy object, the weight of the heavy object will press on the hook 4. Under the action of the weight of the heavy object, the hook 4 rotates counterclockwise around the hook shaft 10, and the swing part of the hook 4 rotates counterclockwise with the counterclockwise rotation of the hook 4, so that the second end of the self-locking connecting rod 5 in the unlocked state rotates with the hook 4, and the first end of the self-locking connecting rod 5 moves upward along the vertical slide groove 31. Gravity can overcome the downward force of the elastic member 6 until the two hinge holes of the self-locking connecting rod 5 and the hook 4 are both located on the same plumb line. At this time, the unhooking structure is in a locked state, and the self-locking connecting rod 5 and the hook 4 are locked in position.

[0045] During the unhooking process, it is necessary to release the hoisted object, operate the boom to swing the entire hoisting attachment forward, so that the hook 4 rotates slightly clockwise due to inertia, or operate the boom to lightly touch the bottom of the hook 4 to the object, so that the hook 4 rotates slightly clockwise. After the hook 4 rotates, the two hinge points at the first end and the second end of the self-locking link 5 are not on the same vertical line as the hook shaft 10, so that the self-locking link 5 is separated from the mechanical dead point, and the elastic member 6 pulls the self-locking link 5, so that the self-locking link 5 moves downward along the vertical slide groove 31 in the housing 3. The self-locking link 5 will push the swinging part of the hook 4 to rotate clockwise during the downward movement. At this time, the hook 4 rotates clockwise around the hook shaft 10, so that the hook mouth of the hook 4 rotates downward until it reaches the hook unhooking limit position.

[0046] It can be seen that the unhooking structure of the lifting attachment of the present application is simple, efficient, and highly adaptable, and can achieve the purpose of automatic unhooking. Through the setting of the mechanical dead point structure of the elastic member 6 and the self-locking connecting rod 5, and the rotational coordination of the hook 4, the hook 4 can be switched between the working state and the unhooking state, realizing automatic unhooking without manual unhooking, which not only improves the efficiency of the telescopic arm forklift in the lifting operation, reduces the safety risks of manual participation, but also improves the safety and ease of operation of the equipment. In addition, the automatic unhooking structure of the lifting attachment is based on mechanical principles, avoids the use of complex electrical or hydraulic systems, reduces manufacturing costs and maintenance difficulties, and makes the lifting attachment suitable for a wide range of lifting operation scenarios.

[0047] It should be noted that the structures of the housing 3 and the elastic member 6 can be varied and can be designed according to actual application requirements or manufacturing cost requirements. For example, the housing 3 can be an integrally formed part or a plurality of parts assembled together, and the housing 3 can be square, round or irregular in shape. The elastic member 6 can be a spring or a torsion spring, and can apply tensile stress or compressive stress to the self-locking connecting rod 5 according to different settings.

[0048] Alternatively, if Figure 3 and Figure 4As shown, a spring hanging hole is provided at the middle position between the first end and the second end of the self-locking connecting rod 5. The elastic member 6 can be a spring, the first end of the elastic member 6 is hinged to the housing 3 through the spring fixing shaft 7, and the second end of the elastic member 6 is hinged to the first end of the self-locking connecting rod 5 through the spring hanging hole. Among them, the hinge point between the first end of the elastic member 6 and the housing 3 is located below the hinge point between the second end of the elastic member 6 and the first end of the self-locking connecting rod 5. At this time, the elastic member 6 is in a stretched state, and exerts a downward force on the self-locking connecting rod 5 by applying tensile stress to the self-locking connecting rod 5.

[0049] Optionally, in order to make the structure of the lifting attachment more stable and reliable, Figure 1 , Figure 3 and Figure 4 As shown, the housing 3 may also include a main body connected below the lifting part, the main body including two housing side walls arranged at intervals and a clamping cavity sandwiched between the two housing side walls, the self-locking connecting rod 5, the elastic member 6, the hinge part and the swinging part are respectively accommodated in the clamping cavity. The two housing side walls are respectively provided with vertical slide grooves 31, that is, each housing side wall is provided with a vertical slide groove 31, the two vertical slide grooves 31 are arranged in a corresponding position, and the self-locking connecting rod 5 is respectively hinged to the two vertical slide grooves 31 through the slide rod shaft 8. Each housing side wall is also provided with a spring hinge hole and a hook hinge hole, the two spring hinge holes are arranged in a corresponding position, and the elastic member 6 is hinged to the two housing side walls through the spring fixing shaft 7 and the two spring hinge holes. The hinge part of the hook 4 is hinged to the two housing side walls through two hook hinge holes and the hook rotating shaft 10.

[0050] Alternatively, if Figure 3 and Figure 4 As shown, the lower end of the housing 3 extends downward and is formed with an anti-slip portion 32. When the unhooking structure is located at the mechanical dead point, the anti-slip portion 32 is buckled on the hook opening of the hook portion to block the hook opening of the hook portion and form a closed hanging ring structure with the hook portion to prevent the object from escaping from the hook 4 during shaking. When the unhooking structure is located at the mechanical dead point, the hook 4 can rotate and move away from the anti-slip portion 32, so that the hook opening of the hook 4 can be reopened to facilitate the automatic unhooking operation.

[0051] Furthermore, the anti-slip part 32 is provided with a first stopper 33, and when the unhooking structure is at the mechanical dead point, the outer peripheral wall of the hook head at the end of the curved hook part abuts against the first stopper 33 for stoppering. In this way, under the stopper 33 on the hook 4, the hook 4 cannot continue to rotate counterclockwise to escape from the mechanical dead point. Since the hook mouth of the hook 4 faces the anti-slip part 32, the hook mouth of the hook 4 cannot continue to rotate upward, thereby preventing the hook 4 from being in a posture that is not conducive to unhooking, making the unhooking structure more reasonable.

[0052] Furthermore, the housing 3 is provided with a second stopper 34, and the hook portion is located between the anti-slip portion 32 and the second stopper 34. When the outer peripheral wall of the upper hook portion abuts against the second stopper 34, the hook opening of the hook portion is arranged horizontally or slightly upward. In this way, the hook 4 cannot continue to rotate clockwise, which can prevent the hook 4 from being in a position that is not conducive to hooking with the hook opening facing downward, making the unhooking structure more reasonable.

[0053] Optionally, the housing 3 may further include a hanging portion located above the vertical slide slot 31, so that the unhooking structure can be directly hung. Of course, the present application is not limited thereto, and the unhooking structure may also be connected to other structures for hanging.

[0054] Furthermore, the lifting attachment may also include a main frame 1 and a shackle 2, and the unhooking structure may be suspended through the main frame 1 and the shackle 2, so that the unhooking structure can be swung easily. Figure 1 and Figure 2 As shown, one end of the main frame 1 is provided with an interface structure 11 for connecting with engineering machinery, the other end of the main frame 1 is provided with a shackle hole 12, the upper end of the shackle 2 is provided with a shackle screw 21, and the shackle screw 21 is passed through the shackle hole 12, so that the upper end of the shackle 2 is hinged to the main frame 1. The hoisting part includes a hoisting hole 35, and the lower end of the shackle 2 is buckled and connected with the hoisting hole 35 of the hoisting part.

[0055] Furthermore, in order to make the swinging action of the unhooking structure more conducive to unhooking, the center line of the lifting hole 35, the center line of the hinge axis between the upper end of the shackle 2 and the main frame 1, the center line of the hinge axis between the first end of the self-locking link 5 and the vertical slide groove 31, the center line of the hinge axis between the second end of the self-locking link 5 and the swing part, and the center line of the hinge axis between the hinge part and the shell 3 are parallel to each other.

[0056] The second aspect of the present application provides an engineering machine, which includes the above-mentioned lifting attachment. Since the engineering machine includes the above-mentioned lifting attachment, it also has all the technical effects brought by the lifting attachment, so it will not be repeated. The engineering machine can be, for example, a telescopic arm forklift or a forklift boom crane.

[0057] Alternatively, if Figure 1 and Figure 2 As shown, the engineering machinery is a telescopic forklift, and the telescopic forklift is provided with an arm head quick-change connection device 100, and the interface structure 11 at the rear end of the main frame 1 is detachably connected to the arm head quick-change connection device 100, so as to realize the installation of the lifting attachment on the telescopic forklift for lifting operations. It should be noted that the structural principle of the arm head quick-change connection device 100 is well known to those skilled in the art, and does not belong to the core improvement part of the present application, so it will not be repeated here.

[0058] To sum up, the lifting accessories of the present application have a simple and efficient structure, strong adaptability, and can realize automatic unhooking operation, which not only improves the efficiency of the telescopic arm forklift in lifting operations, reduces the safety risks of manual participation, but also improves the safety of the equipment and the convenience of operation.

[0059] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood 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 at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A lifting attachment, characterized in that: A decoupling structure is provided, and the decoupling structure comprises: The housing (3) is provided with a vertical slide groove (31) extending in the vertical direction; The hook (4) comprises a hook portion, a hinge portion and a swing portion which are sequentially connected from bottom to top, wherein the hinge portion is hinged to the housing (3); A self-locking connecting rod (5), wherein a first end of the self-locking connecting rod (5) is hinged in the vertical sliding groove (31) and can move up and down along the vertical sliding groove (31), and a second end of the self-locking connecting rod (5) is hinged to the swinging portion; an elastic member (6), wherein a first end of the elastic member (6) is connected to the housing (3), and a second end of the elastic member (6) is connected to a first end of the self-locking connecting rod (5) so as to apply a downward force to the second end of the self-locking connecting rod (5); Wherein, the hinge point between the second end of the self-locking connecting rod (5) and the swinging part, the hinge point between the hinge part and the shell (3), and the vertical center line of the vertical slide groove (31) can be located on the same plumb line when the lifting attachment is suspended, so that the unhooking structure has a mechanical dead point position, and the elastic member (6) can drive the first end of the self-locking connecting rod (5) to move downward along the vertical slide groove (31) when the unhooking structure is located at a non-mechanical dead point position.

2. The lifting attachment according to claim 1, characterized in that: The lower end of the shell (3) extends downward and is formed with an anti-slip portion (32); when the unhooking structure is located at a mechanical dead point, the anti-slip portion (32) is buckled onto the hook opening of the hook portion to form a closed hanging ring structure with the hook portion.

3. The lifting attachment according to claim 2, characterized in that: The anti-detachment portion (32) is provided with a first limiting member (33), and when the unhooking structure is located at a mechanical dead point, the outer peripheral wall of the end hook head of the bent hook portion abuts against the first limiting member (33) for limiting position.

4. The lifting attachment according to claim 2, characterized in that: The shell (3) is provided with a second limiting member (34), the hook portion is located between the anti-slip portion (32) and the second limiting member (34), and when the outer peripheral wall of the upper hook body of the hook portion abuts against the second limiting member (34), the hook mouth of the hook portion is arranged in a transverse direction.

5. The lifting attachment according to claim 1, characterized in that: The housing (3) further comprises a hanging portion located above the vertical slide groove (31).

6. The lifting attachment according to claim 5, characterized in that: The lifting attachment also includes: A main frame (1), one end of the main frame (1) being provided with an interface structure for connecting to engineering machinery; A shackle (2), wherein the upper end of the shackle (2) is hinged to the main frame (1), and the lower end of the shackle (2) is connected to the lifting part.

7. The lifting attachment according to claim 6, characterized in that: The hoisting part comprises a hoisting hole (35) which is buckled with the lower end of the shackle (2); the center line of the hoisting hole (35), the center line of the hinge axis between the upper end of the shackle (2) and the main frame (1), the center line of the hinge axis between the first end of the self-locking connecting rod (5) and the vertical slide groove (31), the center line of the hinge axis between the second end of the self-locking connecting rod (5) and the swinging part, and the center line of the hinge axis between the hinge part and the shell (3) are parallel to each other.

8. The lifting attachment according to claim 5, characterized in that: The shell (3) also includes a main body connected below the lifting part, the main body includes two shell side walls arranged at intervals and a clamping cavity clamped between the two shell side walls, the self-locking connecting rod (5), the elastic member (6), the hinge part and the swinging part are respectively accommodated in the clamping cavity, the two shell side walls are respectively provided with the vertical sliding grooves, the self-locking connecting rod (5) is respectively hinged to the two vertical sliding grooves (31) through the sliding rod shaft (8), and the hinge part is respectively hinged to the two shell side walls through the hook rotating shaft (10).

9. The lifting attachment according to claim 1, characterized in that: The elastic member (6) is a spring, the first end of the elastic member (6) is hinged on the housing (3), the second end of the elastic member (6) is hinged on the first end of the self-locking connecting rod (5), and the hinge point between the first end of the elastic member (6) and the housing (3) is located below the hinge point between the second end of the elastic member (6) and the first end of the self-locking connecting rod (5).

10. An engineering machine, characterized in that: It comprises the lifting attachment according to any one of claims 1 to 9.

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