Lifting appliance and lifting mechanism

Abstract

The utility model provides a lifting appliance and a lifting mechanism, the lifting appliance comprises a lifting appliance body, a hook claw and a limiting piece, the hook claw is arranged at the first end of the lifting appliance body, and the hook claw is configured to hook an opening in a bulge on the side surface of a battery pack so as to limit the movement of the lifting appliance in the horizontal direction; the limiting piece is slidably mounted on the lifting appliance body in the first horizontal direction, and the limiting piece can be moved to a first position or a second position in the first horizontal direction; after the hook claw hooks the open hole, the limiting piece is moved to a first position, the limiting end of the limiting piece is attached to the upper surface of the protrusion on the side face of the battery pack, and the limiting piece is matched with the hook claw to limit movement of the lifting appliance in the vertical direction; and when the limiting piece moves to the second position, the limiting end of the limiting piece leaves the upper surface of the bulge on the side surface of the battery pack so as to release the limiting of the lifting appliance in the vertical direction. According to the lifting appliance, the hook claws are prevented from being separated from open holes due to self weight, and the hook claws do not need to be manually reassembled; the assembly efficiency of the lifting appliance is improved, and the safety of lifting the battery pack is also greatly improved.

Description

Technical Field

[0001] This application belongs to the technical field of hoisting equipment, and particularly relates to a sling and a hoisting mechanism. Background Art

[0002] During the production process of battery packs, due to the large weight of the battery packs, hoisting equipment is required to move the battery packs. Existing hoisting equipment generally hooks several hook claws onto the openings reserved on the side protrusions of the battery packs.

[0003] In order to ensure that the openings of the battery packs can adapt to hook claws of various sizes, the openings are generally made relatively large. This may cause the hook claws to fall off due to their own weight after hooking the openings, and manual re-assembly is required. If the loosening is not discovered in time, there may also be a risk of the battery pack falling during movement, resulting in poor safety. Utility Model Content

[0004] The purpose of this application is to provide a sling to solve the problem that the hook claws of existing slings are prone to falling off when hoisting battery packs; in addition, another purpose of this application is to provide a hoisting mechanism including this sling.

[0005] To achieve this purpose, this application adopts the following technical solutions:

[0006] In a first aspect, this application provides a sling, which includes a sling body, hook claws, and a limiting member. The hook claws are arranged at the first end of the sling body and are configured to hook the openings on the side protrusions of the battery pack to limit the movement of the sling in the horizontal direction;

[0007] The limiting member is slidably mounted on the sling body along a first horizontal direction, and the limiting member can be moved to a first position or a second position along the first horizontal direction;

[0008] After the hook claws hook the openings, the limiting member is moved to the first position, and the limiting end of the limiting member fits against the upper surface of the side protrusion of the battery pack. The limiting member and the hook claws cooperate to limit the movement of the sling in the vertical direction;

[0009] When the limiting member is moved to the second position, the limiting end of the limiting member leaves the upper surface of the side protrusion of the battery pack to release the limit on the sling in the vertical direction.

[0010] The sling body of the sling provided in this application is provided with a limiting member. After the hook claws hook the openings, the limiting member is moved to the first position and fits against the upper surface of the side protrusion of the battery pack. In this way, the hook claws and the limiting member cooperate to limit the sling body in the vertical direction, thereby preventing the hook claws from falling off the openings due to their own weight and eliminating the need for manual re-assembly of the hook claws; the assembly efficiency of the sling is improved, and the safety of hoisting the battery pack is also greatly improved.

[0011] Optionally, an assembly hole is formed in the spreader body along a first horizontal direction, the assembly hole penetrates through the spreader body, and the limiting member is movably installed in the assembly hole along the first horizontal direction;

[0012] The limiting end of the limiting member extends out of the assembly hole along the first horizontal direction and approaches the battery pack, so that the limiting member moves to the first position;

[0013] The limiting end of the limiting member moves away from the battery pack along the first horizontal direction, so that the limiting member moves to the second position.

[0014] By forming an assembly hole in the spreader body and movably installing the limiting member in the assembly hole along the first horizontal direction, an installation method of the limiting member with a compact structure, low cost, and convenient installation and operation is provided.

[0015] Optionally, a limiting component is arranged between the assembly hole and the limiting member. The limiting component includes two elastic limiting members and two first limiting grooves, wherein:

[0016] Receiving grooves for accommodating the elastic limiting members are respectively formed on two side walls of the assembly hole. Each elastic limiting member can extend out of or retract into the corresponding receiving groove, and the two first limiting grooves are symmetrically arranged on two side surfaces of the limiting member respectively;

[0017] When the limiting member moves to the first position, the two elastic limiting members respectively extend out of the receiving grooves and are snapped into the two first limiting grooves to fix the limiting member in the first position.

[0018] By arranging two elastic limiting members and two first limiting grooves between the assembly hole and the limiting member, the limiting member is fixed in the first position, and the displacement of the limiting member after moving to the first position is avoided, greatly improving the stability and reliability of the limiting member for limiting the spreader in the vertical direction.

[0019] Optionally, the limiting component further includes two second limiting grooves, the two second limiting grooves are symmetrically arranged on two side surfaces of the limiting member respectively, and the two second limiting grooves are arranged relatively far away from the limiting end of the limiting member compared with the two first limiting grooves;

[0020] When the limiting member moves to the second position, the two elastic limiting members respectively extend out of the receiving grooves and are snapped into the two second limiting grooves to fix the limiting member in the second position.

[0021] By arranging two second limiting grooves between the assembly hole and the limiting member and through the cooperation of the two elastic limiting members and the two second limiting grooves, the limiting member is fixed in the second position, and the situation that the limiting member falls off the spreader body during the assembly of the spreader is avoided, which is beneficial to improving the assembly efficiency of the spreader.

[0022] Optionally, the elastic limiting member includes a ball and a spring. The first end of the spring abuts against the bottom of the receiving groove, the second end of the spring abuts against the ball, and the ball can partially protrude or retract into the receiving groove.

[0023] Through the cooperation of the ball and the spring, the ball is automatically clamped in the corresponding limiting groove, providing an elastic limiting member with a simple structure and low cost.

[0024] Optionally, the receiving groove penetrates through the sling body, the receiving groove is a threaded groove, and the elastic limiting member further includes a screw sleeve, wherein:

[0025] The screw sleeve has an external thread that is threadedly engaged with the receiving groove. An accommodation space for storing the spring and the ball is provided inside the screw sleeve. An opening for the ball and the spring to enter and exit is provided at the first end of the screw sleeve. A end cap for preventing the ball and the spring from leaving the accommodation space is provided at the second end of the screw sleeve. An internal hexagonal groove is provided at one end of the end cap facing away from the screw sleeve.

[0026] Through the cooperation of the screw sleeve and the receiving groove, the elastic limiting member is screwed to the sling body, so that the position of the ball in the receiving groove is adjustable to ensure the optimal limiting effect; at the same time, it also greatly facilitates the installation and replacement of the elastic limiting member.

[0027] Optionally, the first limiting groove is a V-shaped groove opened in the vertical direction, and the diameter of the ball is greater than the width of the openings of the two first limiting grooves.

[0028] By setting the first limiting groove and the ball, it is convenient for the ball to move into or out of the first limiting groove; at the same time, after the ball moves into the first limiting groove, the ball can be in contact with the two groove surfaces of the V-shaped groove at the same time, which is beneficial to improving the stability of the cooperation and limiting between the ball and the first limiting groove.

[0029] Optionally, a limiting post is further provided on the sling body and located inside the assembly hole. The limiting member is provided with a limiting hole extending along the first horizontal direction, and the limiting post extends into the limiting hole;

[0030] A mounting hole communicating with the assembly hole is vertically provided at the bottom of the sling body. A threaded hole corresponding to the mounting hole is provided on the top wall of the assembly hole. A threaded section is provided at the end of the limiting post. The end of the limiting post sequentially passes through the mounting hole and the limiting hole from bottom to top and is locked in the threaded hole.

[0031] By providing the limiting post extending into the limiting hole, the limiting member cannot leave the limiting post, further preventing the limiting member from falling off the sling body during the assembly of the sling; at the same time, the limiting post is screwed and installed on the sling body, providing a simple structure and convenient disassembly and assembly method for the installation of the limiting post.

[0032] Optionally, a hanging hole for connecting a traction member is provided at the second end of the sling body; an operating handle is provided at the other end of the limiting member away from the limiting end.

[0033] By providing a lifting hole on the sling body, it facilitates the connection between the sling body and the traction member; by providing an operating handle on the limiting member, it facilitates the operation of the limiting member.

[0034] In a second aspect, the present application further provides a lifting mechanism, which includes a main frame, a plurality of lifting members, and a plurality of traction members, wherein:

[0035] A plurality of lifting points are arranged at intervals on the main frame, each lifting point corresponds to a lifting member, the lower end of the lifting member is connected to the corresponding lifting point, and the upper end of the lifting member is connected to the execution end of the lifting device;

[0036] A plurality of traction points are arranged at intervals on the main frame, each traction point corresponds to a traction member, the upper end of the traction member is connected to the corresponding traction point, and the lower end of the traction member is connected with the above-mentioned sling.

[0037] Through the cooperation of the main frame, a plurality of lifting members, and a plurality of traction members, the automatic lifting of the battery pack by the lifting device is realized; a lifting mechanism with stable structure and high lifting efficiency is provided; at the same time, the sling of the lifting mechanism can prevent the hook claw from disengaging from the opening on the side protrusion of the battery pack due to its own weight, eliminating the need for manual re-assembly of the hook claw; improving the assembly efficiency of the sling and greatly enhancing the safety of the battery pack handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a three-dimensional structural schematic diagram of the sling provided by an embodiment of the present application;

[0039] Figure 2 is an exploded schematic diagram of the sling provided by an embodiment of the present application;

[0040] Figure 3 is a side view schematic diagram of the sling provided by an embodiment of the present application;

[0041] Figure 4 is Figure 3 a cross-sectional schematic diagram taken along the A-A direction in

[0042] Figure 5 is a bottom view schematic diagram of the sling provided by an embodiment of the present application;

[0043] Figure 6 is Figure 5 a cross-sectional schematic diagram taken along the B-B direction in

[0044] Figure 7 is a three-dimensional structural schematic diagram of the lifting mechanism provided by an embodiment of the present application;

[0045] Figure 8 is Figure 7 a partial enlarged view at C in

[0046] Figures 1 to 8 It includes the following reference numerals:

[0047] The sling body 10: hook claw 11, limiting member 12, limiting hole 120, operating handle 121, assembly hole 13, accommodating groove 130, elastic limiting member 14, ball 140, spring 141, screw sleeve 142, first limiting groove 15, second limiting groove 16, limiting post 17, mounting hole 18, lifting hole 19;

[0048] The side protrusion 20 of the battery pack, opening 21, battery pack 22;

[0049] The main frame 30: lifting point 31, traction point 32;

[0050] Lifting member 40, traction member 41. Detailed implementation manners

[0051] To make the above objects, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the drawings and specific implementation manners.

[0052] During the production process of the battery pack, due to the large weight of the battery pack body, when moving the battery pack, a hoisting device needs to be used to move the battery pack. The existing hoisting devices generally hook the openings reserved on the side protrusions of the battery pack through several hook claws.

[0053] In order to ensure that the openings of the battery pack can adapt to hook claws of various sizes, the openings are generally made relatively large. This results in that after the hook claws hook the openings, they may fall off due to their own weight and need to be manually reassembled. If the loosening is not detected in time, there may also be a risk of the battery pack falling during the movement, and the safety is poor.

[0054] Therefore, the present application proposes a sling. Please refer to Figure 1 and Figure 8 As shown, the sling proposed in the embodiment of the present application includes a sling body 10, a hook claw 11 and a limiting member 12. The hook claw 11 is arranged at the first end of the sling body 10. The hook claw 11 is configured to hook the opening 21 on the side protrusion 20 of the battery pack to limit the movement of the sling in the horizontal direction; the limiting member 12 is slidably mounted on the sling body 10 along the first horizontal direction ( Figure 1 the X direction in

[0055] It can be seen that a limiting member 12 is provided on the spreader body 10 of the spreader proposed in this application. After the hook claw 11 hooks the opening 21, the limiting member 12 moves to the first position and fits on the upper surface of the convex 20 on the side of the battery pack. In this way, the hook claw 11 and the limiting member 12 cooperate to limit the spreader body 10 in the vertical direction, thereby preventing the hook claw 11 from disengaging from the opening 21 due to its own weight, eliminating the need for manual re-assembly of the hook claw; improving the assembly efficiency of the spreader and greatly enhancing the safety of transporting the battery pack 22.

[0056] Please refer to Figure 2 and Figure 7 As shown, as an implementation manner, an assembly hole 13 is provided on the spreader body 10 along the first horizontal direction. The assembly hole 13 penetrates the spreader body 10, and the limiting member 12 is movably installed in the assembly hole 13 along the first horizontal direction; the limiting end of the limiting member 12 extends out of the assembly hole 13 along the first horizontal direction and approaches the battery pack 22, so that the limiting member 12 moves to the first position; the limiting end of the limiting member 12 moves away from the battery pack 22 along the first horizontal direction, so that the limiting member 12 moves to the second position.

[0057] Specifically, the limiting member 12 is an overall square flat structure, and the assembly hole 13 is a square hole adapted to the limiting member 12.

[0058] It can be seen that by providing the assembly hole 13 on the spreader body 10 and movably installing the limiting member 12 in the assembly hole 13 along the first horizontal direction, a mounting method of the limiting member 12 with a compact structure, low cost, and convenient installation and operation is provided.

[0059] As an implementation manner, a limiting component is provided between the assembly hole 13 and the limiting member 12. The limiting component includes two elastic limiting members 14 and two first limiting grooves 15, where: receiving grooves 130 for accommodating the elastic limiting members 14 are respectively provided on two side walls of the assembly hole 13, each elastic limiting member 14 can extend out of or retract into the corresponding receiving groove 130, and the two first limiting grooves 15 are symmetrically provided on two sides of the limiting member 12 respectively; when the limiting member 12 moves to the first position, the two elastic limiting members 14 respectively extend out of the receiving grooves 130 and are snapped into the two first limiting grooves 15 to fix the limiting member 12 in the first position.

[0060] It can be seen that by providing two elastic limiting members 14 and two first limiting grooves 15 between the assembly hole 13 and the limiting member 12, the limiting member 12 is fixed in the first position, preventing the limiting member 12 from shifting again after moving to the first position, and greatly improving the stability and reliability of the limiting member 12 in limiting the spreader in the vertical direction.

[0061] Please refer to Figures 2 to 5 and Figure 8As shown, as an implementation manner, the limiting component further includes two second limiting grooves 16, and the two second limiting grooves 16 are symmetrically arranged on two side surfaces of the limiting member 12 respectively, and the two second limiting grooves 16 are arranged at the limiting ends of the two first limiting grooves 15 far away from the limiting member 12; when the limiting member 12 is moved to the second position, the two elastic limiting members 14 respectively extend out of the accommodating groove 130 and are clamped into the two second limiting grooves 16 to fix the limiting member 12 at the second position.

[0062] It can be seen that by arranging two second limiting grooves 16 between the assembly hole 13 and the limiting member 12, and through the cooperation of the two elastic limiting members 14 and the two second limiting grooves 16, the limiting member 12 is fixed at the second position, avoiding the limiting member 12 falling off from the hoist body 10 when assembling the hoist, which is beneficial to improving the assembly efficiency of the hoist.

[0063] As an implementation manner, the elastic limiting member 14 includes a ball 140 and a spring 141. The first end of the spring 141 abuts against the bottom of the accommodating groove 130, the second end of the spring 141 abuts against the ball 140, and the ball 140 can partially extend out of or retract into the accommodating groove 130.

[0064] It can be seen that through the cooperation of the ball 140 and the spring 141, the ball 140 is automatically clamped into the corresponding limiting groove, providing an elastic limiting member 14 with a simple structure and low cost.

[0065] As an implementation manner, the accommodating groove 130 penetrates through the hoist body 10, the accommodating groove 130 is a threaded groove, and the elastic limiting member 14 further includes a screw sleeve 142, where: the screw sleeve 142 has an external thread that is threadedly matched with the accommodating groove 130, an accommodating space for storing the spring 141 and the ball 140 is arranged inside the screw sleeve 142, an opening for the ball 140 and the spring 141 to enter and exit is arranged at the first end of the screw sleeve 142, and an end cap for preventing the ball 140 and the spring 141 from leaving the accommodating space is arranged at the second end of the screw sleeve 142, and an internal hexagonal groove is arranged at one end of the end cap facing away from the screw sleeve 142.

[0066] It can be seen that through the cooperation of the screw sleeve 142 and the accommodating groove 130, the elastic limiting member 14 is screwed to the hoist body 10, so that the position of the ball 140 in the accommodating groove 130 is adjustable to ensure the optimal limiting effect; at the same time, it also greatly facilitates the installation and replacement of the elastic limiting member 14; by arranging the internal hexagonal groove, it is convenient to disassemble and assemble the screw sleeve 142 with the help of a wrench.

[0067] As an implementation manner, the first limiting groove 15 is a V-shaped groove opened in the vertical direction, and the diameter of the ball 140 is greater than the width of the openings of the two first limiting grooves 15.

[0068] It can be seen that by providing the first limiting groove 15 and the ball 140, it is convenient for the ball 140 to move into or out of the first limiting groove 15. At the same time, after the ball 140 moves into the first limiting groove 15, the ball 140 can be in contact with both groove surfaces of the V-shaped groove, which is beneficial to improving the stability of the cooperation and limiting between the ball 140 and the first limiting groove 15.

[0069] As an implementation manner, a limiting post 17 is further provided on the spreader body 10 and located in the assembly hole 13. The limiting member 12 is provided with a limiting hole 120 extending along the first horizontal direction, and the limiting post 17 extends into the limiting hole 120. A mounting hole 18 communicating with the assembly hole 13 is vertically provided at the bottom of the spreader body 10. A threaded hole is provided on the top wall of the assembly hole 13 corresponding to the mounting hole 18. A threaded section is provided at the end of the limiting post 17, and the end of the limiting post 17 sequentially passes through the mounting hole 18 and the limiting hole 120 from bottom to top and is locked in the threaded hole.

[0070] It can be seen that by providing the limiting post 17 extending into the limiting hole 120, the limiting member 12 cannot leave the limiting post 17, further preventing the limiting member 12 from falling off the spreader body 10 during the assembly of the spreader. At the same time, the limiting post 17 is screwed and installed on the spreader body 10, providing a simple and convenient installation method for the limiting post 17 that is easy to disassemble and assemble.

[0071] As an implementation manner, a lifting hole 19 for connecting a traction member is provided at the second end of the spreader body 10; an operating handle 121 is provided at the other end of the limiting member 12 away from the limiting end.

[0072] It can be seen that by providing the lifting hole 19 on the spreader body 10, it is convenient to connect the spreader body 10 with the traction member; by providing the operating handle 121 on the limiting member 12, it is convenient to operate the limiting member 12.

[0073] The specific assembly process of the above spreader is as follows: First, insert the limiting member 12 into the assembly hole 13, then pass the limiting post 17 through the limiting hole 120 and screw it into the spreader body 10. Then, install the ball 140 and the spring 141 in the elastic limiting member 14 into the corresponding sleeve 142, and finally screw the sleeve 142 into the corresponding receiving groove 130 so that the ball 140 abuts against the side wall of the limiting member 12.

[0074] When the above spreader is in use, first hook the hook 11 on the opening 21 on the side protrusion 20 of the battery pack, and then push the limiting member 12 to the first position so that the limiting end of the limiting member 12 fits against the upper surface of the side protrusion 20 of the battery pack, that is, restricting the movement of the spreader in the vertical direction.

[0075] The spreader provided by the embodiment of the present application has the following advantages:

[0076] 1) The limiting member and the hook cooperate to limit the lifting tool body in the vertical direction, preventing the hook from disengaging from the opening due to its own weight, improving the assembly efficiency of the lifting tool, and greatly enhancing the safety of transporting the battery pack.

[0077] 2) It can fix the limiting member at the first position, preventing the limiting member from shifting after moving to the first position, greatly improving the stability and reliability of the limiting member in limiting the lifting tool in the vertical direction.

[0078] 3) It can fix the limiting member at the second position, preventing the limiting member from falling off the lifting tool body, which is beneficial to improving the assembly efficiency of the lifting tool.

[0079] 4) The overall structure is compact, reasonably designed, and easy to operate.

[0080] Please refer to Figure 7 and Figure 8 As shown, the embodiment of the present application also proposes a hoisting mechanism, which includes a main frame 30, a plurality of lifting members 40 and a plurality of traction members 41, wherein: a plurality of lifting points 31 are arranged at intervals on the main frame 30, each lifting point 31 corresponds to a lifting member 40, the lower end of the lifting member 40 is connected to the corresponding lifting point 31, and the upper end of the lifting member 40 is connected to the execution end of the hoisting equipment; a plurality of traction points 32 are arranged at intervals on the main frame 30, each traction point 32 corresponds to a traction member 41, the upper end of the traction member 41 is connected to the corresponding traction point 32, and the lower end of the traction member 41 is connected with the above-mentioned lifting tool.

[0081] Specifically, according to the size of the battery pack 22, different numbers of traction members 41 are configured. In this embodiment, eight traction members 41 are provided. Of course, four, six or other numbers of traction members 41 can also be set according to needs.

[0082] Through the cooperation of the main frame 30, a plurality of lifting members 40 and a plurality of traction members 41, the automatic hoisting of the battery pack by the hoisting equipment is realized; a hoisting mechanism with stable structure and high hoisting efficiency is provided; at the same time, the lifting tool of this hoisting mechanism can prevent the hook 11 from disengaging from the opening 21 on the side protrusion 20 of the battery pack due to its own weight, eliminating the need for manual re-assembly of the hook; improving the assembly efficiency of the lifting tool and greatly enhancing the safety of transporting the battery pack.

[0083] The above embodiments only illustrate the basic principles and characteristics of the present application. The present application is not limited by the above examples. Without departing from the spirit and scope of the present application, there are various changes and modifications to the present application, and these changes and modifications all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A sling, characterized in that, The sling includes a sling body, a hook claw and a limiting member, where: the hook claw is arranged at the first end of the sling body, and the hook claw is configured to hook an opening on the side protrusion of the battery pack to limit the movement of the sling in the horizontal direction; The limiting member is slidably mounted on the sling body along a first horizontal direction, and the limiting member can be moved to a first position or a second position along the first horizontal direction; After the hook claw hooks the opening, the limiting member is moved to the first position, and the limiting end of the limiting member fits on the upper surface of the side protrusion of the battery pack. The limiting member and the hook claw cooperate to limit the movement of the sling in the vertical direction; When the limiting member is moved to the second position, the limiting end of the limiting member leaves the upper surface of the side protrusion of the battery pack to release the limit on the sling in the vertical direction.

2. The spreader according to claim 1, characterized in that, An assembly hole is formed in the sling body along the first horizontal direction, the assembly hole penetrates through the sling body, and the limiting member is movably mounted in the assembly hole along the first horizontal direction; The limiting end of the limiting member extends out of the assembly hole along the first horizontal direction and approaches the battery pack, so that the limiting member is moved to the first position; The limiting end of the limiting member moves away from the battery pack along the first horizontal direction, so that the limiting member is moved to the second position.

3. The spreader according to claim 2, wherein, A limiting component is arranged between the assembly hole and the limiting member. The limiting component includes two elastic limiting members and two first limiting grooves, where: Receiving grooves for accommodating the elastic limiting members are respectively formed on two side walls of the assembly hole. Each elastic limiting member can extend out of or retract into the corresponding receiving groove. The two first limiting grooves are symmetrically arranged on two sides of the limiting member respectively; When the limiting member is moved to the first position, the two elastic limiting members respectively extend out of the receiving grooves and are clamped into the two first limiting grooves to fix the limiting member at the first position.

4. The spreader according to claim 3, characterized in that, The limiting component further includes two second limiting grooves, the two second limiting grooves are symmetrically arranged on two sides of the limiting member respectively, and the two second limiting grooves are arranged away from the limiting end of the limiting member relative to the two first limiting grooves; When the limiting member is moved to the second position, the two elastic limiting members respectively extend out of the receiving grooves and are clamped into the two second limiting grooves to fix the limiting member at the second position.

5. The spreader according to claim 3, characterized in that, The elastic limiting member includes a ball and a spring. The first end of the spring abuts against the bottom of the receiving groove, the second end of the spring abuts against the ball, and the ball can partially extend out of or retract into the receiving groove.

6. The spreader according to claim 5, characterized in that, The receiving groove penetrates through the sling body, the receiving groove is a threaded groove, and the elastic limiting member further includes a screw sleeve, where: The screw sleeve has an external thread that is threadedly matched with the receiving groove. A receiving space for storing the spring and the ball is arranged inside the screw sleeve. An opening for the ball and the spring to enter and exit is arranged at the first end of the screw sleeve. An end cover for preventing the ball and the spring from leaving the receiving space is arranged at the second end of the screw sleeve. An internal hexagonal groove is arranged at one end of the end cover facing away from the screw sleeve.

7. The spreader according to claim 5, wherein, The first limiting groove is a V-shaped groove opened in the vertical direction, and the diameter of the ball is greater than the width of the openings of the two first limiting grooves.

8. The spreader according to claim 2, characterized in that A limiting post located in the assembly hole is further provided on the hoist body. The limiting member is provided with a limiting hole extending in the first horizontal direction, and the limiting post extends into the limiting hole. An installation hole communicating with the assembly hole is vertically provided at the bottom of the hoist body. A threaded hole is provided on the top wall of the assembly hole corresponding to the installation hole. A threaded section is provided at the end of the limiting post, and the end of the limiting post sequentially passes through the installation hole and the limiting hole from bottom to top and is locked in the threaded hole.

9. The spreader according to claim 1, characterized in that, A lifting hole for connecting a traction member is provided at the second end of the hoist body; an operation handle is provided at the other end of the limiting member away from the limiting end.

10. A hoisting mechanism, characterized in that, The hoisting mechanism includes a main frame, a plurality of lifting members, and a plurality of traction members, wherein: A plurality of lifting points are spaced apart on the main frame. Each lifting point corresponds to a lifting member. The lower end of the lifting member is connected to the corresponding lifting point, and the upper end of the lifting member is connected to the execution end of the hoisting device. A plurality of traction points are spaced apart on the main frame. Each traction point corresponds to a traction member. The upper end of the traction member is connected to the corresponding traction point, and the lower end of the traction member is connected to the hoist as described in any one of claims 1-9.

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