Lifting appliance

Abstract

The utility model relates to a lifting appliance which is used for lifting an object to be lifted, the lifting appliance comprises a base body, an adjusting part and a rail, the adjusting part and the rail are arranged on the base body, the length of the adjusting part can be changed so that the adjusting part can detachably abut against and fix the object to be lifted, and the rail is movably connected with a balance weight structure with adjustable mass. By means of the technical scheme, at least one of the position of the balance weight structure and the mass of the balance weight structure can be adjusted, so that the to-be-hoisted object can be kept balanced in the hoisting process, the safety in the hoisting process can be improved, and meanwhile follow-up work such as placement and installation of the to-be-hoisted object is facilitated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of hoisting construction, and in particular to a hoisting device. Background Art

[0002] A fuel cell stack is a battery stack composed of multiple fuel cells. Its purpose is to obtain voltage for practical applications. When in use, in order to protect the fuel cell stack from impact, bumps, water immersion and other factors, the fuel cell stack needs to be installed in a sealed box. However, the box is large in size and heavy in weight, so a hoist is required during the installation process.

[0003] In the related art, the box is usually lifted by assembling with slings and lifting rings, and the lifting process is relatively simple. Specifically, the lifting ring is first installed into the original threaded hole on the box, and then the sling is passed through the lifting ring and hung on the hook of the crane. For safety during the lifting process, at least two slings are usually required to be used together. The two slings are respectively connected to different lifting rings and are both hung on the hook. However, during the lifting process, the elastic elongation of different slings may be different, or the weight of the box itself is unbalanced, which will cause the box to not be well balanced during the lifting process and cause a certain tilt. When the box is subsequently placed on the mounting plate, it will cause an impact on the mounting plate, causing damage to the seal installed between the box and the mounting plate, affecting the sealing after the subsequent box assembly is completed. Utility Model Content

[0004] The purpose of the present disclosure is to provide a hoisting device which can maintain the balance of the object to be hoisted during hoisting, so as to at least partially solve the above technical problems.

[0005] In order to achieve the above-mentioned object, the present disclosure provides a sling for slinging an object to be slinged, the sling comprising:

[0006] matrix;

[0007] an adjusting member, disposed on the base, the length of which can be changed so as to be able to detachably press against and fix the object to be hoisted; and

[0008] A track is arranged on the base body, and a weight structure with adjustable mass is movably connected to the track.

[0009] Optionally, the counterweight structure includes a connecting rod and an end head and a locking member connected to the connecting rod, a counterweight block with adjustable mass is sleeved on the connecting rod, the connecting rod passes through the track, the end head and the locking member are arranged at intervals on both sides of the track, and the connecting rod is lockably movably connected to the track through the locking member and the end head.

[0010] Optionally, the number of the tracks is two, and the two tracks are symmetrically arranged about a center line of the base along a vertical direction.

[0011] Optionally, a level is provided on the substrate.

[0012] Optionally, the number of the adjusting members is two and they are cross-arranged, and both ends of the adjusting members along the length direction can be detachably pressed against the inner wall of the object to be hoisted which is constructed as a box.

[0013] Optionally, the adjusting member includes an intermediate rod, an adjusting rod and a driving member, the two ends of the intermediate rod have threads with opposite rotation directions, the number of the adjusting rods is set to two and they are respectively threadedly sleeved on the two ends of the intermediate rod, and the driving member drives the intermediate rod to rotate and make the two adjusting rods move closer to or away from each other to change the length of the adjusting member.

[0014] Optionally, the driving member includes a worm wheel connected to the intermediate rod, a worm drivingly connected to the worm wheel, and a power member connected to the worm.

[0015] Optionally, the two power members are arranged symmetrically about a center line of the base along a vertical direction.

[0016] Optionally, a limiting sleeve for the adjusting rod to pass through is arranged on the base, and the limiting sleeve is used to stop the adjusting rod from rotating in the circumferential direction and enable the adjusting rod to move in the axial direction.

[0017] Optionally, a laser positioning module is arranged on the substrate.

[0018] Through the above technical solution, the hoist can maintain the balance of the object to be hoisted during hoisting, that is, by changing the length of the adjusting part, the abutment and fixation of the object to be hoisted can be achieved, and then by adjusting at least one of the position of the counterweight structure and the mass of the counterweight structure, for example, the position of the counterweight structure on the track can be changed, and / or the mass of the counterweight structure can be changed, so that the object to be hoisted can maintain balance during the hoisting process, which is beneficial to improving the safety of the hoisting process and is convenient for subsequent placement and installation of the object to be hoisted.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0021] Figure 1is a schematic diagram of the overall structure of a sling provided in an exemplary embodiment of the present disclosure;

[0022] Figure 2 is a schematic diagram of the overall structure of a counterweight structure provided in an exemplary embodiment of the present disclosure;

[0023] Figure 3 Schematic diagram of the overall structure of the adjusting member provided in the exemplary embodiment of the present disclosure.

[0024] Description of Reference Numerals

[0025] 1. Base; 2. Adjusting part; 21. Intermediate rod; 22. Adjusting rod; 23. Driving part; 231. Worm wheel; 232. Worm; 3. Track; 4. Counterweight structure; 41. Connecting rod; 42. End; 43. Locking part; 44. Counterweight block; 5. Level; 6. Power part; 61. Handwheel; 7. Limiting sleeve; 8. Object to be hoisted; 81. Box. DETAILED DESCRIPTION

[0026] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0027] In the present disclosure, unless otherwise stated, "inside" and "outside" refer to the inside and outside of the outline of the corresponding component; "far" and "near" refer to the distance and nearness of the corresponding component in space relative to another component. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another element and do not have order and importance. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0028] The hanger in the exemplary embodiment of the present disclosure will be described below with reference to the accompanying drawings.

[0029] Reference Figures 1 to 3 The present disclosure relates to a sling for hoisting an object 8 to be hoisted. The sling comprises a base 1, an adjusting member 2 and a track 3 arranged on the base 1. The length of the adjusting member 2 can be changed so as to be able to detachably press against and fix the object 8 to be hoisted. A counterweight structure 4 with adjustable mass is movably connected to the track 3.

[0030] Through the above technical scheme, the hoist can maintain the balance of the object to be hoisted 8 during hoisting, that is, by changing the length of the adjusting member 2, the abutment and fixation of the object to be hoisted 8 can be achieved, and then by adjusting at least one of the position of the counterweight structure 4 and the mass of the counterweight structure 4, for example, the position of the counterweight structure 4 on the track 3 can be changed, and / or the mass of the counterweight structure 4 can be changed, so that the object to be hoisted 8 can maintain balance during the hoisting process, which is beneficial to improving the safety of the hoisting process and is convenient for subsequent placement and installation of the object to be hoisted 8.

[0031] In an exemplary application scenario, for example, the object to be hoisted 8 may be a box 81 for sealing a fuel cell stack, as shown in FIG. Figure 1 The box 81 is constructed as a square frame structure without a bottom and a cover, wherein the fuel cell stack has been pre-installed on the bottom plate, and a sealing structure is provided between the bottom plate and the box 81. During the hoisting operation, the hoist is extended from the top of the box 81 into the inside of the box 81, and the box 81 is fixed by changing the length of the adjusting member 2 so that the adjusting member 2 can press against the inner wall of the box 81, and then the hoist and the box 81 are hoisted by a crane, and the box 81 is balanced by adjusting the position of the counterweight structure 4 on the track 3 and / or changing the weight of the counterweight structure 4. When the box 81 is placed on the bottom plate after being hoisted to the specified position, the box 81 is in a balanced state, which can protect the sealing structure and reduce the possibility that the edges or corners of the box 81 damage the sealing structure and affect the subsequent sealing effect of the fuel cell stack. In some other possible embodiments not shown in the drawings, the adjusting member 2 can also press against the outer wall of the box 81 to fix the box 81, and the present disclosure is not limited to this.

[0032] In some embodiments, reference Figure 1 and Figure 2The counterweight structure 4 may include a connecting rod 41 and an end 42 and a locking member 43 connected to the connecting rod 41, a counterweight block 44 with adjustable mass is sleeved on the connecting rod 41, wherein the connecting rod 41 passes through the track 3, the end 42 and the locking member 43 are arranged at intervals on both sides of the track 3, and the connecting rod 41 is movably connected to the track 3 through the locking member 43 and the end 42 in a lockable manner. In this way, the connecting rod 41 can be installed on the track 3 through the end 42 and the locking piece 43, that is, the end 42 and the locking piece 43 are arranged at intervals on both sides of the track 3, so that the connecting rod 41 can be connected to the track 3 without detachment and can move on the track 3. Exemplarily, the locking piece 43 can be constructed as a butterfly nut, which is threadedly connected to the connecting rod 41 and is located on the top side of the track 3, and the end 42 is connected to the connecting rod 41 and is located on the bottom side of the track 3, wherein the counterweight 44 is placed between the end 42 and the track 3, and the butterfly nut or the connecting rod 41 is rotated to change the position of the butterfly nut on the connecting rod 41, so that the butterfly nut and the counterweight 44 respectively abut against the two sides of the track 3, thereby fixing the connecting rod 41 at any position on the track 3. When the position of the counterweight structure 4 needs to be changed, the butterfly nut can be rotated to make the butterfly nut and the counterweight block 44 separate from the track 3, and then the connecting rod 41 can be moved to change the position of the counterweight structure 4 on the track 3, so as to adjust the balance of the hoisted object 8. In addition, the mass of the counterweight structure 4 as a whole can be adjusted by changing the number of counterweight blocks 44 or the mass of a single counterweight block 44. Specifically, the butterfly nut can be rotated to make the butterfly nut separate from the connecting rod 41, and then the connecting rod 41 can be moved to separate from the track 3. If the counterweight structure 4 is light, the number of counterweight blocks 44 can be increased on the connecting rod 41, or any one or more of the counterweight blocks 44 can be replaced with a counterweight block 44 with a larger mass, so as to increase the mass of the counterweight structure 4 as a whole. If the counterweight structure 4 is heavy, the number of counterweight blocks 44 can be reduced on the connecting rod 41, or any one or more of the counterweight blocks 44 can be replaced with a counterweight block 44 with a smaller mass, so as to reduce the mass of the counterweight structure 4 as a whole. Of course, in actual use, it may also be necessary to adjust the position and mass of the counterweight structure 4, and the adjustment can be adaptively made according to actual needs, and the present disclosure does not make specific limitations on this.

[0033] It can be understood that in some other possible embodiments not shown in the accompanying drawings, the locking member 43 can also be constructed as, for example, an annular magnet, which is sleeved on the connecting rod 41 and can be magnetically connected to the track 3 so as to fix the connecting rod 41 at any position on the track 3. In addition, the locking member 43 can also be constructed as, for example, a snap-on block sleeved on the connecting rod 41 so as to be snap-fitted with the track 3 to fix the adjusting rod 22, but the present disclosure is not limited to this.

[0034] In some embodiments, reference Figure 1 , the number of tracks 3 can be set to two, and the two tracks 3 are symmetrically arranged about the center line of the base 1 in the vertical direction. In this way, the two tracks 3 are arranged to be balanced and distributed relative to the center of the base 1, so as not to affect the balance of the sling itself, wherein, for example, the track 3 can be constructed in an arc shape to facilitate the adjustment of the counterweight structure 4. It can be understood that the track 3 can also be constructed in any other suitable shape, for example, the track 3 can also be constructed in a regular shape such as a square or a polygon. In addition, the number of tracks 3 can also be set to multiple, and the multiple tracks 3 are evenly spaced around the center line of the base 1 in the vertical direction. In some other possible embodiments not shown in the accompanying drawings, the number of tracks 3 can also be set to one, and the track 3 is connected to the base 1 by, for example, a bracket. At this time, the track 3 can be constructed in a regular shape such as a circle, a square or a polygon, and the center of the circular track 3 is the center of the base 1. The present disclosure is not limited to this.

[0035] It should be noted that the number of the counterweight structures 4 arranged on the track 3 can be determined according to actual needs. For example, Figure 1 , the number of tracks 3 is set to two, and each track 3 is provided with a counterweight structure 4. In some other possible embodiments not shown in the drawings, the number of counterweight structures 4 on any track 3 can be set to multiple, so as to facilitate the adjustment of the balance of the object to be hoisted 8. This disclosure does not make specific limitations on this.

[0036] In some embodiments, reference Figure 1 A spirit level 5 is provided on the base 1, so that the staff can directly observe the overall balance of the sling and the object to be hoisted 8 at this time through the spirit level 5, that is, in the process of adjusting the balance of the object to be hoisted 8 through the counterweight structure 4, the spirit level 5 can be observed at the same time to reflect the balance state of the object to be hoisted 8 at this time through the spirit level 5, which is conducive to improving the speed and accuracy of the adjustment process compared with only visual perception.

[0037] In some embodiments, reference Figure 1, the number of adjusting members 2 can be set to two and arranged crosswise, and the two ends of the adjusting members 2 along the length direction can be detachably pressed against the inner wall of the object to be hoisted 8 constructed as a box 81, so that the box 81 can be releasably fixed by changing the length of the adjusting members 2. In this way, the box 81 can be fixed by the cooperation of the two adjusting members 2, and the cross arrangement of the two adjusting members 2 can abut the box 81 in two different directions to improve the stability of the box 81 when fixed. Exemplarily, the two adjusting members 2 can be arranged perpendicular to each other, and in some other possible deformation modes, the two adjusting members 2 can also be arranged crosswise at an angle to each other. It can be understood that the number of adjusting members 2 can also be set to multiple, and the multiple adjusting members 2 are arranged crosswise at an angle to each other to improve the stability when fixing the box 81. The present disclosure does not make specific restrictions on this. In addition, the adjusting members 2 act on the inner wall of the box 81, which can also reduce the damage to the structure such as the anti-corrosion layer on the outside of the box 81, and ensure the anti-corrosion performance of the box 81.

[0038] In some embodiments, reference Figure 1 and Figure 3 The adjusting member 2 may include an intermediate rod 21, an adjusting rod 22 and a driving member 23, wherein the two ends of the intermediate rod 21 have threads with opposite rotation directions, or the intermediate rod 21 may adopt a bidirectional screw, the number of the adjusting rods 22 is set to two and they are respectively threadedly sleeved on the two ends of the intermediate rod 21, and the driving member 23 drives the intermediate rod 21 to drive the intermediate rod 21 to rotate so that the two adjusting rods 22 move closer to each other or farther from each other to change the length of the adjusting member 2. In this way, in the process of fixing the box body 81, the intermediate rod 21 can be driven by the driving member 23 to rotate so as to drive the adjusting rod 22 to move along the axial direction of the intermediate rod 21, and the two adjusting rods 22 move closer to each other so that the length of the adjusting member 2 is reduced. At this time, the sling can be extended from the top of the box body 81 into the inside of the box body 81, and then the intermediate rod 21 is driven by the driving member 23 to rotate in the opposite direction so as to drive the two adjusting rods 22 to move away from each other so that the length of the adjusting member 2 is increased, until both adjusting rods 22 abut against the inner wall of the box body 81 to fix the box body 81. It is understandable that a leg with a larger contact area may be provided at the end of the adjustment rod 22, and the leg may be made of, for example, rubber material to have a larger friction coefficient, so that it has a larger friction force when in contact with the inner wall of the box body 81, thereby improving the stability when fixing the box body 81. The present disclosure is not limited thereto.

[0039] It is understandable that the driving member 23 can be constructed in any suitable manner. In some embodiments, for example, referring to Figure 3The driving member 23 may include a worm wheel 231 connected to the intermediate rod 21, a worm 232 driving the worm wheel 231, and a power member 6 connected to the worm 232. In this way, the power member 6 can drive the worm 232 to rotate, and then the worm 232 drives the worm wheel 231 to rotate to drive the intermediate rod 21 to rotate, thereby realizing the movement of the two adjusting rods 22 closer to or farther from each other, so as to fix or release the box body 81. At the same time, the worm 232 and the worm wheel 231 have a certain self-locking ability, that is, after the adjusting rod 22 abuts against the inner wall of the box body 81, the worm 232 and the worm wheel 231 are self-locking, so as to reduce the possibility that the worm 232 rotates in the opposite direction and causes the adjusting rod 22 to be separated from the inner wall of the box body 81, thereby improving the stability when fixing the box body 81.

[0040] The power member 6 can be constructed as any suitable structure. For example, Figure 1 and Figure 3 The power member 6 can be configured as a hand wheel 61, which is connected to the end of the worm 232 passing through the base 1, that is, the staff can drive the worm 232 to rotate by turning the hand wheel 61, which can save effort during the rotation process. In addition, in some other possible deformation modes, the power member 6 can also be configured as a power motor, which can be arranged inside the base 1 and drive the worm 232 to drive the worm 232 to rotate. The present disclosure is not limited to this.

[0041] It can be understood that the worm wheel 231 and at least part of the worm 232 are arranged inside the base 1, so that the base 1 can provide protection for the worm wheel 231 and the worm 232, reducing the possibility that the worm wheel 231 and the worm 232 are damaged and deformed by the external environment, making it impossible to adjust the position of the adjusting rod 22.

[0042] In some other possible embodiments not shown in the drawings, the driving member 23 may include a driving motor and a bevel gear set. Specifically, the bevel gear set may include a first bevel gear and a second bevel gear that are meshed and connected. The second bevel gear is connected to the middle rod 21. The driving motor drives the first bevel gear, so that the middle rod 21 can be driven to rotate through the second bevel gear, thereby realizing the movement of the two adjustment rods 22 closer to or farther from each other, so as to fix or release the box 81. Similarly, the driving motor and the bevel gear set may also be arranged inside the base 1, so that the driving motor and the bevel gear set can be protected by the base 1 to ensure the normal movement of the adjustment rod 22, that is, the normal use of the sling.

[0043] In some embodiments, reference Figure 1The two power members 6 are symmetrically arranged about the center line of the base 1 in the vertical direction. In this way, the two power members 6 are arranged to be balanced relative to the center of the base 1, so as not to affect the balance of the sling itself. Taking the power member 6 as a hand wheel 61 as an example, the two hand wheels 61 are arranged on the top of the base 1 and symmetrically arranged about the center line of the base 1, so that they are in a balanced state relative to the center of the base 1, and it is also convenient for the staff to rotate and adjust the hand wheel 61.

[0044] In some embodiments, reference Figure 1 and Figure 3 The base body 1 is provided with a limiting sleeve 7 through which the adjusting rod 22 passes. The limiting sleeve 7 is used to stop the adjusting rod 22 from rotating in the circumferential direction and enable the adjusting rod 22 to move in the axial direction. In this way, the limiting sleeve 7 can stop the circumferential rotation of the adjusting rod 22. The adjusting rod 22 is threadedly connected to the intermediate rod 21, so that the adjusting rod 22 can move in its own axial direction, thereby changing the position of the adjusting rod 22, and further changing the combined length of the intermediate rod 21 and the adjusting rod 22. By way of example, a limiting groove can be provided on the outer wall of the adjusting rod 22, and a limiting block can be provided on the inner wall of the limiting sleeve 7. During the rotation of the intermediate rod 21, the limiting groove abuts against the limiting block so that the adjusting rod 22 cannot rotate with the intermediate rod 21, but moves in the axial direction through the threaded connection with the intermediate rod 21 to achieve a change in position. It is understandable that the limiting block can be formed on the outer wall of the adjusting rod 22, and correspondingly, the limiting groove can be formed on the inner wall of the limiting sleeve 7, which is not specifically limited in the present disclosure.

[0045] In some embodiments, a laser positioning module (not shown in the figure) can be provided on the base 1. The laser positioning module can be connected to the bottom of the base 1 through a bracket or other structure, so that the installation position of the box 81 can be located when the box 81 is installed. For example, the laser positioning module can project a cross center line onto the bottom plate to facilitate the installation of the box 81 to the specified position, so as to assist the sling to complete the placement and installation of the box 81 and improve the efficiency of the installation.

[0046] The present disclosure exemplarily describes the use process of the spreader.

[0047] Taking the object 8 to be hoisted as a box 81 as an example, first, the staff drives the worm 232 to rotate by operating the handwheel 61, and the worm 232 drives the middle rod 21 to rotate through the worm wheel 231, and the two adjusting rods 22 move closer to each other to reduce the length of the adjusting member 2. At this time, the sling can be extended from the top of the box 81 into the inside of the box 81, and then the staff rotates the handwheel 61 in the reverse direction to drive the worm 232 to rotate, and the worm 232 drives the middle rod 21 to rotate in the reverse direction through the worm wheel 231, and the two adjusting rods 22 move away from each other to increase the length of the adjusting member 2 until the two adjusting rods 22 are both in contact with the inner wall of the box 81 to fix the box 81.

[0048] The hoist and the box 81 are lifted by a crane, and the butterfly nut is rotated so that the butterfly nut and the counterweight 44 are separated from the track 3, and then the connecting rod 41 can be moved to change the position of the counterweight structure 4 on the track 3, and the level 5 is observed at the same time to adjust the balance of the hoisted object 8. Alternatively, the butterfly nut is rotated to disengage the butterfly nut from the connecting rod 41, and then the connecting rod 41 is moved to be separated from the track 3, and the mass of the counterweight structure 4 is increased by increasing the number of counterweights 44 or replacing them with counterweights 44 with larger mass, and the mass of the counterweight structure 4 is reduced by reducing the number of counterweights 44 or replacing them with counterweights 44 with smaller mass, and then the position of the counterweight structure 4 can be selected according to the actual situation, and the level 5 is observed simultaneously to adjust the balance of the hoisted object 8.

[0049] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0051] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A hoisting device for hoisting an object to be hoisted, characterized in that: The sling comprises: matrix; an adjusting member, disposed on the base, the length of which can be changed so as to be able to detachably press against and fix the object to be hoisted; and A track is arranged on the base body, and a weight structure with adjustable mass is movably connected to the track.

2. The sling according to claim 1, characterized in that: The counterweight structure includes a connecting rod and an end and a locking piece connected to the connecting rod. A counterweight block with adjustable mass is sleeved on the connecting rod. The connecting rod passes through the track. The end and the locking piece are arranged at intervals on both sides of the track. The connecting rod is lockably movably connected to the track through the locking piece and the end.

3. The sling according to claim 2, characterized in that: The number of the rails is two, and the two rails are symmetrically arranged about a center line of the base along a vertical direction.

4. The sling according to any one of claims 1 to 3, characterized in that: A level is arranged on the base.

5. The sling according to claim 1, characterized in that: The number of the adjusting members is two and they are arranged crosswise, and the two ends of the adjusting members along the length direction can be detachably pressed against the inner side wall of the object to be hoisted which is structured as a box.

6. The sling according to claim 5, characterized in that: The adjusting member includes an intermediate rod, an adjusting rod and a driving member. The two ends of the intermediate rod have threads with opposite rotation directions. The number of the adjusting rods is set to two and they are respectively threadedly sleeved on the two ends of the intermediate rod. The driving member drives and connects the intermediate rod to drive the intermediate rod to rotate so that the two adjusting rods move closer to or away from each other to change the length of the adjusting member.

7. The sling according to claim 6, characterized in that: The driving member includes a worm wheel connected to the intermediate rod, a worm drivingly connected to the worm wheel, and a power member connected to the worm.

8. The sling according to claim 7, characterized in that: The two power members are symmetrically arranged about a center line of the base body along a vertical direction.

9. The sling according to claim 6, characterized in that: The base is provided with a limiting sleeve for the adjusting rod to pass through, and the limiting sleeve is used to stop the adjusting rod from rotating in the circumferential direction and enable the adjusting rod to move in the axial direction.

10. The sling according to claim 1, characterized in that: A laser positioning module is arranged on the base.

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