Lifting appliance

Abstract

The utility model discloses a lifting appliance. The lifting appliance comprises an upper clamping assembly and a lower clamping assembly, the lower clamping assembly is rotationally arranged at one end of the upper clamping assembly and comprises a first clamping piece and a second clamping piece which are rotationally connected. The first clamping piece comprises a first straight section and a first clamping section which are connected with each other, the second clamping piece comprises a second straight section and a second clamping section which are connected with each other, one end of the first straight section and one end of the second straight section are rotationally connected with the upper clamping assembly, and the other end of the first straight section and the other end of the second straight section are rotationally connected. A clamping space is defined by the first clamping section and the second clamping section, and the length of the first clamping piece is larger than that of the second clamping piece. The length of the first clamping piece is set to be longer than that of the second clamping piece, so that the inlet of the clamping space is located on the side edge of the lifting appliance and is different from the traditional design that the inlet is located at the bottom of the lifting appliance, and meanwhile, the first clamping piece and the second clamping piece are of an asymmetric structure, so that the lifting appliance can adapt to a narrow space, and is simple and efficient; convenience and rapidness are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting devices, in particular to a hoisting device. Background Art

[0002] When round tubes or round bars are delivered or shipped, they are usually placed side by side or in multiple layers. When lifting them, the available space is small. For heavier products, it is not convenient to manually reverse and move them. They can only be fixed and lifted from one side of the tube, which increases the difficulty of lifting the tube.

[0003] At present, there are two ways to lift long round tubes: one is to use a lifting strap combined with the crane's own hook. After the lifting strap is passed through the pipe, the two ends are hooked in the crane hook. Each time the lifting is carried out, the crane lock buckle must be pressed to remove one end of the lifting strap, and then the lifting strap must be bypassed by the pipe (or the lifting strap must be pulled out from under the pipe). This method has the problems of cumbersome pipe lifting steps, low lifting efficiency, and large shaking during the lifting process. Another method is to use quick clamps for lifting pipes. This method requires sufficient space on both sides of the radial direction of the round pipe to lower the clamps during lifting. At the same time, the lifting device must be manually adjusted. When the quick clamp is in a vertical position, it can lock the pipe only when the crane moves up a certain distance with manual assistance. This method also has many limitations during the lifting process and is not suitable for pipe clamping and lifting in a narrow space. Utility Model Content

[0004] Aiming at the technical problem that the existing lifting tools are not suitable for clamping and lifting pipes in a narrow space, the utility model provides a lifting tool.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] A sling comprises an upper clamping assembly and a lower clamping assembly, wherein the lower clamping assembly is rotatably arranged at one end of the upper clamping assembly, and comprises a first clamping member and a second clamping member which are rotatably connected, wherein the first clamping member comprises a first straight section and a first clamping section which are connected to each other, and the second clamping member comprises a second straight section and a second clamping section which are connected to each other, wherein one end of the first straight section and the second straight section are rotatably connected to the upper clamping assembly, and the other ends of the first straight section and the second straight section are rotatably connected, and the first clamping section and the second clamping section enclose a clamping space, wherein the length of the first clamping member is longer than the length of the second clamping member.

[0007] Optionally, the sling further includes an anti-slip portion, and the anti-slip portion is provided at a rotational connection between the first straight section of the first clamping member and the second straight section of the second clamping member.

[0008] Optionally, the upper clamping assembly includes a third clamping member and a fourth clamping member. One ends of the third clamping member and the fourth clamping member are rotatably connected. The other end of the third clamping member is rotatably connected to the end of the second straight section of the second clamping member away from the clamping space. The other end of the fourth clamping member is rotatably connected to the end of the first straight section of the first clamping member away from the clamping space.

[0009] Optionally, the spreader further includes a plurality of rotating parts. One ends of the third clamping member and the fourth clamping member are rotatably connected through the first rotating part. The other ends of the fourth clamping member and the third clamping member are respectively rotatably connected to one end of the first clamping member and the second clamping member through the second rotating part and the third transmission part. The other ends of the first straight section of the first clamping member and the second straight section of the second clamping member are rotatably connected through the fourth rotating part.

[0010] Optionally, the rotating part includes a rotating shaft and a bearing, and the bearing is sleeved on the rotating shaft;

[0011] Or, the rotating part includes a rotating shaft, a bearing and a handle. The bearing is sleeved on the rotating shaft, and the handle is sleeved on the rotating shaft.

[0012] Optionally, the spreader further includes an anti - detachment part, and the anti - detachment part is arranged at the rotation connection of the third clamping member and the fourth clamping member;

[0013] Or, the anti - detachment part is arranged at the rotation connection of the third clamping member and the end of the second straight section of the second clamping member away from the clamping space;

[0014] Or, the anti - detachment part is arranged at the rotation connection of the fourth clamping member and the end of the first straight section of the first clamping member away from the clamping space.

[0015] Optionally, the anti - detachment part includes a spiral body and a force - applying arm, and the force - applying arms extend from both ends of the spiral body.

[0016] Optionally, the third clamping member includes two first clamping arms arranged at intervals. The fourth clamping member is clamped at one end of the two first clamping arms, and the second clamping member is clamped at the other end of the two first clamping arms.

[0017] Optionally, the first clamping member includes two second clamping arms arranged at intervals. The fourth clamping member is clamped at one end of the two second clamping arms, and the second clamping member is clamped at the middle of the two second clamping arms.

[0018] Optionally, the spreader further includes a lifting ring, and the lifting ring is rotatably connected to one end of the upper clamping assembly;

[0019] Alternatively, the first clamping section (2112) is designed as a semi-circle;

[0020] Alternatively, the second clamping section (222) is designed as an arc.

[0021] The sling of the present utility model includes an upper clamping assembly and a lower clamping assembly. The lower clamping assembly is rotatably arranged at one end of the upper clamping assembly and includes a first clamping member and a second clamping member that are rotatably connected. The first clamping member includes a first straight section and a first clamping section that are connected to each other. The second clamping member includes a second straight section and a second clamping section that are connected to each other. One end of the first straight section and the second straight section is rotatably connected to the upper clamping assembly, and the other ends of the first straight section and the second straight section are rotatably connected. The first clamping section and the second clamping section enclose a clamping space. Among them, the length of the first clamping member is longer than the length of the second clamping member. By setting the length of the first clamping member to be longer than the length of the second clamping member, the present utility model makes the entrance formed by the free ends of the first clamping section and the second clamping section, that is, the entrance of the clamping space, located on the side of the sling, which is different from the traditional design where the entrance is located at the bottom of the sling. At the same time, the asymmetric structure of the first clamping member and the second clamping member is more conducive to the sling adapting to narrow spaces, being simple, efficient, convenient and fast. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 It is an exploded structural schematic diagram of an embodiment of the sling of the present utility model;

[0024] Figure 2 It is a structural schematic diagram of one perspective of an embodiment of the sling of the present utility model;

[0025] Figure 3 It is a structural schematic diagram of another perspective of an embodiment of the sling of the present utility model.

[0026] Explanation of the Reference Numerals in the Drawings:

[0027]

[0028]

[0029] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the embodiments and the drawings. Detailed Embodiments

[0030] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0034] For products such as round tubes or round bars during incoming or outgoing shipments, they are mostly placed side by side in multiple rows and stacked in multiple layers. When lifting them, the operable space is relatively small. For heavier products, it is not convenient to manually reverse and move them, and they can only be fixed and lifted from one side of the pipe, which also increases the lifting difficulty of the pipe. In view of this situation, a lifting tool 100 is provided.

[0035] Please refer to Figures 1-3The sling 100 provided by the utility model includes an upper clamping assembly 10 and a lower clamping assembly 20. The lower clamping assembly 20 is rotatably arranged at one end of the upper clamping assembly 10, and includes a first clamping member 21 and a second clamping member 22 that are rotatably connected. The first clamping member 21 includes a first straight section 2111 and a first clamping section 2112 that are connected to each other. The second clamping member 22 includes a second straight section 221 and a second clamping section 222 that are connected to each other. One end of the first straight section 2111 and the second straight section 221 are rotatably connected to the upper clamping assembly 10, and the other ends of the first straight section 2111 and the second straight section 221 are rotatably connected. The first clamping section 2112 and the second clamping section 222 enclose a clamping space 20A, wherein the length of the first clamping member 21 is longer than the length of the second clamping member 22.

[0036] It can be understood that the lower clamping assembly of a traditional sling includes two lower clamping members, and both lower clamping members include a straight section and a clamping section, and are symmetrically arranged. In this way, the opening of the clamping space formed by the two clamping sections must be located at the bottom of the sling. In this way, there may be objects to be clamped in a narrow space that cannot be clamped, such as multiple round tubes stacked side by side or in multiple layers. In order to be able to use it in a narrow space, the sling must be reversed and moved so that the entrance formed by the free ends of the two clamping sections, that is, the entrance of the clamping space is relatively located on the side of the sling, so as to meet the requirement of the clamping sections to avoid the clamped objects, and then complete the clamping of the round tube or other objects to be hung in the narrow space. This reversal needs to be completed manually, which is time-consuming and labor-intensive.

[0037] The utility model sets the length of the first clamping member 21 to be longer than the length of the second clamping member 22, so that the entrance formed by the free ends of the first clamping section 2112 and the second clamping section 222, that is, the entrance of the clamping space 20A, is located on the side of the sling 100, which is different from the traditional design where the entrance is located at the bottom of the sling. At the same time, the asymmetric structure of the first clamping member 21 and the second clamping member 22 is more conducive to the sling adapting to a small space, which is simple, efficient, convenient and fast.

[0038] It can be understood that the first straight section 2111 and the second straight section 221 have high strength, which can facilitate reliable lifting of the object to be lifted. The specific structure of the first clamping section 2112 and the second clamping section 222 is adapted to the object to be clamped. The first clamping section 2112 can be arc-shaped, L-shaped, semicircular, elliptical, etc., and the second clamping section 222 can be arc-shaped, L-shaped, semicircular, elliptical, etc., which are not limited here.

[0039] Specifically, the first clamping section 2112 and the second clamping section 222 are provided with a plurality of anti-slip grooves for covering the flexible material to prevent the first clamping section 2112 and the second clamping section 222 made of hard material from directly contacting the object to be suspended, thereby protecting the object to be suspended.

[0040] In one embodiment, please refer to Figures 1-3 , the first clamping section 2112 is designed as a semi-circular shape, and the second clamping section 222 is designed as an arc shape. The arc-shaped second clamping section 222 can better achieve the avoidance of the item to be clamped, and the semi-circular first clamping section 2112 can better match the shape of the item to be lifted, making it easier for the item to be lifted to enter from the entrance formed by the free ends of the second clamping section 222 and the first clamping section 2112. Moreover, the clamping space 20A formed by enclosing the first clamping section 2112 and the second clamping section 222 is shaped like becoming narrower first, then wider, and then narrower in the height direction, making it easier for the item to be lifted to abut against the semi-circular first clamping section 2112 and the arc-shaped second clamping section 222, improving the clamping effect.

[0041] In one embodiment, please refer to Figures 1-3 , the lifting device 100 further includes an anti-detachment part 30, and the anti-detachment part 30 is arranged at the rotational connection of the first straight section 2111 of the first clamping member 21 and the second straight section 221 of the second clamping member 22.

[0042] In one embodiment, please refer to Figures 1-3 , the anti-detachment part 30 includes a spiral body and a force application arm. The force application arms extend from both ends of the spiral body. In this way, the spiral body is located at the rotational connection of the first straight section 2111 of the first clamping member 21 and the second straight section 221 of the second clamping member 22. Through holes are provided at the corresponding positions of the first straight section 2111 of the first clamping member 21 and the second straight section 221 of the second clamping member 22 corresponding to the force application arms. The force application arms of the anti-detachment part 30 abut against the through holes, so that in the free state where the item to be lifted enters the clamping space 20A but is not lifted, the first clamping section 2112 and the second clamping section 222 can always be in a closed state to prevent the item to be lifted from falling off the clamping space 20A. Specifically, the anti-detachment part 30 can be a torsion spring or other structures with a torsional spring force, which is not limited herein.

[0043] In one embodiment, please refer to Figures 1-3 , the upper clamping assembly 10 includes a third clamping member 11 and a fourth clamping member 12. One ends of the third clamping member 11 and the fourth clamping member 12 are rotationally connected. The other end of the third clamping member 11 is rotationally connected to the end of the second straight section 221 of the second clamping member 22 away from the clamping space 20A, and the other end of the fourth clamping member 12 is rotationally connected to the end of the first straight section 2111 of the first clamping member 21 away from the clamping space 20A.

[0044] In one embodiment, please refer to Figures 1-3 , the lifting device 100 further includes an anti-detachment part 30, and the anti-detachment part 30 is arranged at the rotational connection of the third clamping member 11 and the fourth clamping member 12.

[0045] In one embodiment, please refer to Figures 1-3 , the spreader 100 further includes a anti-disengagement part 30, and the anti-disengagement part 30 is arranged at the rotational connection of the third clamping member 11 and one end of the second straight section 221 of the second clamping member 22 away from the clamping space 20A.

[0046] In one embodiment, please refer to Figures 1-3 , the spreader 100 further includes a anti-disengagement part 30, and the anti-disengagement part 30 is arranged at the rotational connection of the fourth clamping member 12 and one end of the first straight section 2111 of the first clamping member 21 away from the clamping space 20A.

[0047] In one embodiment, the anti-disengagement part 30 includes a spiral body and a force application arm, and the force application arms extend from both ends of the spiral body. Specifically, the anti-disengagement part 30 can be a torsion spring or other structures with torsional spring force, which is not limited herein.

[0048] It can be understood that the anti-disengagement part 30 can be separately arranged at the rotational connection of the first clamping member 21 and the second clamping member 22, or can be separately arranged at the rotational connection of the second clamping member 22 and the third clamping member 11, or can be separately arranged at the rotational connection between the third clamping member 11 and the fourth clamping member 12, or can be separately arranged at the rotational connection of the fourth clamping member 12 and the first clamping member 21. Of course, it can also be arranged at any two or three, or all four of the above four rotational connections at the same time.

[0049] It can be understood that in the first case: If the anti - detachment part 30 is arranged at the rotational connection of the second clamping member 22 and the third clamping member 11, pressure can be applied simultaneously in the direction towards each other of the second clamping member 22 and the third clamping member 11. In this way, the entrance formed by the free end of the second clamping section 222 and the first clamping section 2112 gradually increases until it is slightly larger than the diameter of the round tube. The tube can be clamped from one radial side of the round tube. After releasing the pressure, the self - locking of the lifting tool 100 can be completed by relying on the torsional spring force of the torsion spring, and the lifting tool 100 will not unhook. In the second case: If the anti - detachment part 30 is arranged at the rotational connection of the fourth clamping member 12 and the first clamping member 21, pressure can be applied simultaneously in the direction towards each other of the fourth clamping member 12 and the first clamping member 21 to achieve the clamping of the tube by the lifting tool 100, and the self - locking of the lifting tool 100 is achieved by relying on the torsional spring force of the torsion spring. In the third case: If the anti - detachment part 30 is arranged at the rotational connection of the first clamping member 21 and the second clamping member 22, pressure can be applied simultaneously in the direction away from each other of the first straight section 2111 of the first clamping member 21 and the second straight section 221 of the second clamping member 22 to achieve the clamping of the tube by the lifting tool 100, and the self - locking of the lifting tool 100 is achieved by relying on the torsional spring force of the torsion spring. In the fourth case: If the anti - detachment part 30 is arranged at the rotational connection between the third clamping member 11 and the fourth clamping member 12, pressure can be applied simultaneously in the direction away from each other of the third clamping member 11 and the fourth clamping member 12. Of course, pressure can also be applied simultaneously in the direction away from each other of the first straight section 2111 of the first clamping member 21 and the second straight section 221 of the second clamping member 22 to achieve the clamping of the tube by the lifting tool 100, and the self - locking of the lifting tool 100 is achieved by relying on the torsional spring force of the torsion spring.

[0050] In one embodiment, please refer to Figures 1-3 , the lifting tool 100 further includes a plurality of rotating parts 40. One ends of the third clamping member 11 and the fourth clamping member 12 are rotationally connected through the first rotating part 40. The other ends of the fourth clamping member 12 and the third clamping member 11 are respectively rotationally connected to one ends of the first clamping member 21 and the second clamping member 22 through the second rotating part 40 and the third transmission part 40. The other ends of the first straight section 2111 of the first clamping member 21 and the second straight section 221 of the second clamping member 21 are rotationally connected through the fourth rotating part 40.

[0051] Specifically, in order to better realize the rotational connection between the first clamping member 21, the second clamping member 22, the third clamping member 11, and the fourth clamping member 12, the rotating part 40 includes a rotating shaft 41 and a bearing 42, and the bearing 41 is sleeved on the rotating shaft 42.

[0052] It can be understood that the spiral body of the anti-slip part 30 is sleeved on the rotating shaft 41, and the first clamping member 21, the second clamping member 22, the third clamping member 11, and the fourth clamping member 12 are provided with through holes corresponding to the force arm of the anti-slip part 30, and the force arm abuts against the through holes to better adjust the relative positions of the first clamping member 21, the second clamping member 22, the third clamping member 11, and the fourth clamping member 12, so as to achieve the first clamping section 2112 and the second clamping section 222 in a free state where the object to be hung enters the clamping space 20A but is not lifted, so as to prevent the object to be hung from falling off from the clamping space 20A.

[0053] In one embodiment, please refer to Figures 1-3 The rotating portion 40 further includes a handle 43 , and the handle 43 is sleeved on the rotating shaft 42 .

[0054] It is understandable that, in order to better apply pressure to the first clamping member 21, the second clamping member 22, the third clamping member 11, and the fourth clamping member 12, in the above four cases, in the first and second cases, the handle 43 is arranged on the rotating drawer 41 of the first and fourth rotating parts 40, so as to simultaneously apply pressure to the direction in which the second clamping member 22 and the third clamping member 11 face each other; in the third and fourth cases, the handle 43 is arranged on the rotating drawer 41 of the second and third rotating parts 40, so as to apply pressure to the direction in which the third clamping member 11 and the fourth clamping member 12 depart from each other. It is understandable that, in order to facilitate single-handed operation, the handle 43 is arranged on the rotating drawer 41 of the first and fourth rotating parts 40.

[0055] Specifically, the handle 43 is provided with an anti-skid pattern, which has an anti-skid effect.

[0056] In one embodiment, please refer to Figures 1-3 The third clamping member 11 includes two first clamping arms 111 that are spaced apart from each other. The fourth clamping member 12 is clamped at one end of the two first clamping arms 111 . The second clamping member 22 is clamped at the other end of the two first clamping arms 111 .

[0057] It can be understood that by setting the two first clamping arms 111, the overall strength of the third clamping member 11 can be better guaranteed, and it can also facilitate the rotational connection between the third clamping member 11 and the fourth clamping member 12 and the second clamping member 22, thereby reducing the difficulty of assembling the third clamping member 11 and ensuring the rotation reliability of the third clamping member 11.

[0058] In one embodiment, please refer to Figures 1-3 The first clamping member 21 includes two second clamping arms 211 that are spaced apart from each other. The fourth clamping member 12 is clamped at one end of the two second clamping arms 211 . The second clamping member 22 is clamped at the middle of the two second clamping arms 211 .

[0059] It can be understood that by providing the two second clamping arms 211, the overall strength of the first clamping member 21 can be better ensured, and it is also convenient to realize the rotational connection thereof with the fourth clamping member 12 and the second clamping member 22, thereby reducing the assembly difficulty of the first clamping member 21 and ensuring the rotational reliability of the first clamping member 21.

[0060] It can be understood that two anti-disengagement portions 30 can be provided at the rotational connection between the fourth clamping member 12 and one ends of the two first clamping arms 111 to further increase the pre-clamping force. Similarly, two anti-disengagement portions 30 can be provided at the rotational connection between the second clamping member 22 and the other ends of the two first clamping arms 111, at the rotational connection between the fourth clamping member 12 and one ends of the two second clamping arms 211, and at the rotational connection between the second clamping member 22 and the middle portions of the two second clamping arms 211 to further increase the pre-clamping force.

[0061] It can be understood that the second clamping member 22 and the fourth clamping member 12 can be provided with a single-arm structure, or can be provided with a double-arm structure such as the first clamping member 21 and the third clamping member 11, and those skilled in the art can select according to the actual situation, which is not limited herein.

[0062] In one embodiment, please refer to Figures 1-3 , the sling 100 further includes a sling ring 50, and the sling ring 50 is rotatably connected to one end of the upper clamping assembly 10.

[0063] It can be understood that by providing the sling ring 50, the convenience for an operator to use the sling 100 through other devices can be further improved, thereby increasing the applicable range of the sling 100.

[0064] Taking the first case where the anti-disengagement portion 30 is provided at the rotational connection between the second clamping member 22 and the third clamping member 11 and the handle 43 is provided on the rotating shaft 41 of the first and fourth rotating portions 40 as an example for description, when the sling 100 of the present invention is specifically operated, hold the two handles 43 with hands and apply pressure to the opposite sides of the second clamping member 22 and the third clamping member 11. At this time, the entrance formed by the second clamping section 222 and the free end of the first clamping section 2112 gradually increases until it is slightly larger than the diameter of the round tube, and the round tube can be clamped from one radial side of the round tube. Then, release the handles 43, and the self-locking of the sling 100 can be completed by relying on the torsional spring force of the torsion spring. At this time, when the crane rises, the sling 100 will not become unfastened; when the lifting is completed, hold the two handles 43 again and apply pressure inward to remove the sling 100, and the clamping and lifting work of the round tube can be completed.

[0065] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.

Claims

1. A lifting tool (100), characterized in that, It includes an upper clamping assembly (10) and a lower clamping assembly (20). The lower clamping assembly (20) is rotatably arranged at one end of the upper clamping assembly (10), and includes a first clamping member (21) and a second clamping member (22) which are rotatably connected. The first clamping member (21) includes a first straight section (2111) and a first clamping section (2112) which are connected to each other. The second clamping member (22) includes a second straight section (221) and a second clamping section (222) which are connected to each other. One end of the first straight section (2111) and the second straight section (221) is rotatably connected to the upper clamping assembly (10), and the other ends of the first straight section (2111) and the second straight section (221) are rotatably connected. The first clamping section (2112) and the second clamping section (222) enclose a clamping space (20A). Among them, the length of the first clamping member (21) is longer than that of the second clamping member (22).

2. The spreader (100) according to claim 1, characterized in that, The spreader (100) further includes an anti - detachment part (30), and the anti - detachment part (30) is arranged at the rotational connection between the first straight section (2111) of the first clamping member (21) and the second straight section (221) of the second clamping member (22).

3. The spreader (100) according to claim 1, characterized in that, The upper clamping assembly (10) includes a third clamping member (11) and a fourth clamping member (12). One end of the third clamping member (11) and the fourth clamping member (12) is rotatably connected. The other end of the third clamping member (11) is rotatably connected to the end of the second straight section (221) of the second clamping member (22) away from the clamping space (20A), and the other end of the fourth clamping member (12) is rotatably connected to the end of the first straight section (2111) of the first clamping member (21) away from the clamping space (20A).

4. The spreader (100) according to claim 3, characterized in that, The spreader (100) further includes a plurality of rotating parts (30). One end of the third clamping member (11) and the fourth clamping member (12) is rotatably connected through the first rotating part (30). The other ends of the fourth clamping member (12) and the third clamping member (11) are respectively rotatably connected to one end of the first clamping member (21) and the second clamping member (22) through the second rotating part (30) and the third transmission part (30). The other ends of the first straight section (2111) of the first clamping member (21) and the second straight section (221) of the second clamping member (22) are rotatably connected through the fourth rotating part (30).

5. The spreader (100) according to claim 4, characterized in that, The rotating part (30) includes a rotating shaft (41) and a bearing (42), and the bearing (42) is sleeved on the rotating shaft (41); Or, the rotating part (30) includes a rotating shaft (41), a bearing (42) and a handle (43). The bearing (42) is sleeved on the rotating shaft (41), and the handle (43) is sleeved on the rotating shaft (41).

6. The spreader (100) according to claim 3, characterized in that, The sling (100) further includes an anti - detachment part (30), and the anti - detachment part (30) is arranged at the rotation connection of the third clamping member (11) and the fourth clamping member (12); Or, the anti - detachment part (30) is arranged at the rotation connection of the third clamping member (11) and one end of the second straight section (221) of the second clamping member (22) away from the clamping space (20A); Or, the anti - detachment part (30) is arranged at the rotation connection of the fourth clamping member (12) and one end of the first straight section (2111) of the first clamping member (21) away from the clamping space (20A).

7. The spreader (100) according to claim 2 or 6, characterized in that, The anti - detachment part (30) includes a spiral body and a force - applying arm, and force - applying arms extend from both ends of the spiral body.

8. The spreader (100) according to claim 3, characterized in that, The third clamping member (11) includes two first clamping arms (111) arranged at intervals, the fourth clamping member (12) is clamped at one end of the two first clamping arms (111), and the second clamping member (22) is clamped at the other end of the two first clamping arms (111).

9. The spreader (100) according to claim 3, characterized in that, The first clamping member (21) includes two second clamping arms (211) arranged at intervals, the fourth clamping member (12) is clamped at one end of the two second clamping arms (211), and the second clamping member (22) is clamped at the middle of the two second clamping arms (211).

10. The spreader (100) according to claim 1, characterized in that, The sling (100) further includes a lifting ring (50), and the lifting ring (50) is rotatably connected to one end of the upper clamping assembly (10); Or, the first clamping section (2112) is designed as a semi - circular shape; Or, the second clamping section (222) is designed as an arc shape.

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