Quick loading and unloading lifting appliance

Abstract

The invention provides a quick loading and unloading lifting appliance. The quick loading and unloading lifting appliance comprises a base frame, a bearing component and a clamping component, a main body and an auxiliary base plate are arranged on the base frame, a hanging ring is arranged on the main body, the auxiliary base plate is arranged on the main body through a fixing rod, a first helical tooth sleeve facing the auxiliary base plate is arranged on the main body, and a second helical tooth sleeve facing the main body is arranged on the auxiliary base plate; the bearing component comprises a movable seat and a movable self-locking piece, the movable seat is movably connected with the auxiliary base plate through a guide rod, a limiting groove is formed in the movable seat, and a spring bolt matched with the limiting groove is arranged at the end of the movable self-locking piece; the movable self-locking piece is movably arranged on the auxiliary base plate, and a double-face gear sleeve is arranged on the movable self-locking piece. And the double-sided gear sleeve comprises upper helical teeth matched with the first helical tooth sleeve and lower helical teeth matched with the second helical tooth sleeve. The quick loading and unloading lifting appliance can quickly and conveniently realize loading and unloading of coiled materials, can reduce the swing amplitude of the coiled materials in the carrying process, and improves the carrying convenience and safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of handling equipment, in particular to a quick loading and unloading lifting appliance. BACKGROUND

[0002] The traditional loading and unloading lifting appliance is the core equipment in the industrial handling field, and is mainly used for lifting, moving and positioning of large materials. Its core function is to realize vertical transportation and horizontal displacement of materials through mechanical or other adsorption methods, and it is widely used in manufacturing plants, port logistics, construction sites and other scenes.

[0003] The traditional coiled material lifting appliance is usually designed for materials such as heavy steel coils, such as the Chinese utility model patent with the announcement number CN111483919B and the name "a coiled material lifting appliance and a lifting arm", which discloses a coiled material lifting appliance and a lifting arm with the coiled material lifting appliance, which comprises a supporting rod, a left lifting hook group and a right lifting hook group. When working, two hooks are moved to the two ends of the coiled material, two intermediate pieces are installed on the cross hook plate, then the supporting rod is inserted through the lifting hole of the coiled material, and the two ends of the supporting rod are connected with the supporting part. When the lifting hook is lifted, the supporting rod can lift the coiled material.

[0004] However, such lifting appliance has large volume and heavy weight, and is not suitable for application in the material handling scene of large volume and light weight such as foamed coiled material or foamed coiled material. When the foamed coiled material is handled, the existing method is to first bind the coiled material with a rope, and then hang it on the lifting hook of the lifting appliance. Such method is not convenient to operate, and the coiled material is easy to swing or even overturn during transportation, which has safety hazards.

[0005] Therefore, how to design a quick loading and unloading lifting appliance to quickly and conveniently realize the loading and unloading of coiled material, and to reduce the swing amplitude of the coiled material during handling, and to improve the convenience and safety of handling, is a technical problem to be solved by those skilled in the art. SUMMARY

[0006] In view of the shortcomings of the prior art, the present application provides a quick loading and unloading lifting appliance, which can quickly and conveniently realize the loading and unloading of coiled material, and can reduce the swing amplitude of the coiled material during handling, and can improve the convenience and safety of handling.

[0007] The purpose of the present application is achieved by the following technical scheme:

[0008] A quick loading and unloading lifting appliance, comprising: a base frame, a supporting component and a clamping component;

[0009] The main body is provided with a lifting ring, and the auxiliary base plate is provided on the main body through a fixing rod. The main body is provided with a first bevel gear sleeve facing the auxiliary base plate, and the auxiliary base plate is provided with a second bevel gear sleeve facing the main body.

[0010] The supporting component comprises a movable seat and a movable self-locking piece, the movable seat is movably connected with the auxiliary base plate through a guide rod, a limiting groove is formed in the movable seat, and an end of the movable self-locking piece is provided with a locking tongue matched with the limiting groove; the movable self-locking piece is movably arranged on the auxiliary base plate, and a double-sided tooth sleeve is arranged on the movable self-locking piece; the double-sided tooth sleeve comprises an upper inclined tooth matched with the first inclined tooth sleeve and a lower inclined tooth matched with the second inclined tooth sleeve.

[0011] The clamping component comprises a linkage assembly and a clamping jaw frame, the linkage assembly is hingedly connected with the main body and the movable seat, and the linkage assembly drives the clamping jaw frame to open and close to clamp the coiled material.

[0012] In one embodiment, the number of the linkage assemblies is two, and the two linkage assemblies are arranged on the two sides of the base frame, respectively.

[0013] Each of the linkage assemblies comprises two driven linkages and two driving linkages, one end of the driven linkage is hingedly connected with the main body, the other end of the driven linkage is hingedly connected with the end of the driving linkage, the driving linkage is rotatably arranged on the movable seat and connected with the clamping jaw frame; and in the same vertical plane in the direction of gravity, the two driven linkages are symmetrically arranged, and the two driving linkages are symmetrically arranged.

[0014] In one embodiment, the base frame is provided with a positioning assembly matched with the lifting ring, the positioning assembly comprises a series of rods fixedly arranged on the lifting ring and a plurality of positioning sheets, a waist-shaped hole is formed in the positioning sheet, the series of rods pass through the waist-shaped hole, and the plurality of positioning sheets are arranged side by side and movably arranged on the lifting ring.

[0015] In one embodiment, the positioning sheet is made of aluminum-based alloy, and the thickness of the positioning sheet is 2-5 mm.

[0016] In one embodiment, the base frame is provided with a counterweight on each side, and the two counterweights are distributed on the vertical plane of the central axis of the lifting ring.

[0017] In one embodiment, the base frame is provided with a hydraulic drive assembly on each side, the hydraulic drive assembly comprises a hydraulic cylinder and a telescopic rod, the hydraulic cylinder is fixedly connected with the base frame, the counterweight is mounted at the end of the telescopic rod, and the hydraulic drive assembly can adjust the distance between the counterweight and the base frame.

[0018] In one embodiment, the clamping jaw frame comprises a plurality of arc-shaped frameworks and a cross beam, and the plurality of arc-shaped frameworks are connected with each other through the cross beam.

[0019] In one of the embodiments, the crossbeam comprises a hollow sleeve rod and an extension sleeve rod, the extension sleeve rod is movably arranged in the hollow sleeve rod, and part of the arc-shaped framework is arranged on the extension sleeve rod.

[0020] In one of the embodiments, the limiting groove is in T-shaped structure in cross section, a blocking protruding rib is formed at the groove wall of the limiting groove, and the lock tongue is matched with the limiting groove.

[0021] The limiting groove and the lock tongue have a locking state and an unlocking state, when in the locking state, the lock tongue is accommodated in the limiting groove and clamped with the blocking protruding rib, and when in the unlocking state, the lock tongue is separated from the limiting groove.

[0022] In summary, the quick loading and unloading lifting appliance can quickly and conveniently realize the loading and unloading of the coiled material, and can reduce the swing amplitude of the coiled material during the carrying process, and improve the convenience and safety of the carrying. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows.

[0024] Figure 1 It is a structural schematic diagram of the quick loading and unloading lifting appliance of the present application;

[0025] Figure 2 It is a structural schematic diagram of the quick loading and unloading lifting appliance of the present application; Figure 1 It is a partial structural schematic diagram of the quick loading and unloading lifting appliance of the present application;

[0026] Figure 3 It is a partial structural schematic diagram of the quick loading and unloading lifting appliance of the present application; Figure 2 It is a partial structural schematic diagram of the quick loading and unloading lifting appliance of the present application;

[0027] Figure 4 It is a structural schematic diagram of the base frame and the movable self-locking piece of the present application; Figure 3 It is a structural schematic diagram of the base frame and the movable self-locking piece of the present application;

[0028] Figure 5 It is a structural schematic diagram of the base frame and the movable self-locking piece of the present application; Figure 1 It is a planar sectional view of the supporting component in the locking state;

[0029] Figure 6 It is a structural schematic diagram of the clamping component of the present application; Figure 1 It is a structural schematic diagram of the clamping component of the present application;

[0030] Figure 7 It is a structural schematic diagram of the clamping component of the present application; Figure 1 It is a structural schematic diagram of the clamping component of the present application;

[0031] Figure 8 It is a structural schematic diagram of the clamping component of the present application; Figure 1 It is a schematic diagram of the use state of the quick loading and unloading lifting appliance of the present application (I);

[0032] Figure 9 for Figure 1 The diagram shows the usage status of the quick-loading and unloading lifting equipment (II);

[0033] Figure 10 for Figure 1 The diagram shows the structure of the supporting component in the unlocked state.

[0034] Figure 11 This is a schematic diagram of the positioning component of the present invention;

[0035] Figure 12 for Figure 11 The diagram shows the usage status of the positioning component.

[0036] Figure 13 This is a schematic diagram of the base frame and hydraulic drive assembly in another embodiment. Detailed Implementation

[0037] To facilitate understanding of the present invention, a more comprehensive description will be provided below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives achieved by the present invention, should still fall within the scope of the technical content disclosed in the present invention. Furthermore, the terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships are also considered within the scope of the present invention without substantial alteration of the technical content.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] This invention discloses a quick-loading and unloading lifting device 10, designed to enable rapid and convenient loading and unloading of roll materials, and to reduce the swaying amplitude of the roll materials during handling, thereby improving the convenience and safety of handling. Figure 1As shown, the quick-loading and unloading lifting device 10 includes: a base frame 100, a supporting component 200, and a clamping component 300.

[0040] Among them, such as Figure 2 and Figure 3 As shown, the base frame 100 is provided with a main body 110 and an auxiliary base plate 120. The main body 110 is provided with a lifting ring 111. The auxiliary base plate 120 is provided on the main body 110 through a fixing rod 121. The main body 110 is provided with a first helical toothed sleeve 101 facing the auxiliary base plate 120. The auxiliary base plate 120 is provided with a second helical toothed sleeve 102 facing the main body 110.

[0041] like Figures 3 to 5 As shown, the supporting component 200 includes a movable seat 210 and a movable self-locking member 220. The movable seat 210 is movably connected to the auxiliary base plate 120 via a guide rod 211. The movable seat 210 has a limiting groove 212, and the end of the movable self-locking member 220 has a locking tongue 221 that engages with the limiting groove 212. The movable self-locking member 220 is movably mounted on the auxiliary base plate 120. During operation, the movable self-locking member 220 can rotate and move up and down relative to the limiting groove 212. Furthermore, the movable self-locking member 220 is provided with a double-sided toothed sleeve 222. The double-sided toothed sleeve 222 includes an upper helical tooth 2221 that engages with the first helical toothed sleeve 101 and a lower helical tooth 2222 that engages with the second helical toothed sleeve 102.

[0042] Preferred, such as Figure 4 and Figure 5 As shown, the cross-section of the limiting groove 212 is T-shaped, and a blocking protrusion 2121 is formed on the groove wall of the limiting groove 212. The locking tongue 221 matches the limiting groove 212. During operation, the limiting groove 212 and the locking tongue 221 cooperate to have a locked state and an unlocked state. When locked, the locking tongue 221 is contained within the limiting groove 212 and engaged with the blocking protrusion 2121; when unlocked, the locking tongue 221 disengages from the limiting groove 212. The specific working principle will be explained below.

[0043] like Figure 1 and Figure 3 As shown, the clamping component 300 includes a linkage assembly 310 and a gripper frame 320. The linkage assembly 310 hinges the main body 110 and the movable seat 210. The linkage assembly 310 drives the gripper frame 320 to open and close to clamp the roll material.

[0044] Preferred, such as Figures 1 to 3As shown, the number of the link assembly 310 is two groups, and the two groups of link assembly 310 are respectively arranged on both sides of the base frame 100. Each group of link assembly 310 includes two driven links 311 and two driving links 312, one end of the driven link 311 is hinged with the main body 110, the other end of the driven link 311 is hinged with the end of the driving link 312, the driving link 312 is rotatably arranged on the movable seat 210 and connected with the jaw frame 320. At the same time, in the same vertical plane in the direction of gravity, the two driven links 311 are symmetrically arranged with each other, and the two driving links 312 are also symmetrically arranged with each other.

[0045] Preferably, as Figure 6 shown, the jaw frame 320 includes a plurality of arc skeletons 321 and a cross beam 322, and the plurality of arc skeletons 321 are connected with each other through the cross beam 322. When the jaw frame 320 clamps the coiled material, the arc skeletons 321 with the arc can better fit the outer contour of the coiled material, so that the clamping is more reliable.

[0046] Next, the working principle of the quick loading and unloading lifting appliance 10 of the present application will be described in combination with the above structure, please refer to Figures 2 to 10 :

[0047] Initially, the supporting part 200 is in the locked state, as Figure 5 shown, the locking tongue 221 of the movable self-locking part 220 is accommodated in the limiting groove 212, and the locking tongue 221 is clamped with the blocking convex edge 2121 of the limiting groove 212. At this time, the movable seat 210 is close to the auxiliary base plate 120, and cannot be far away due to the clamping of the movable self-locking part 220. At the same time, as Figure 8 shown, the driving link 312 and the driven link 311 are close to each other, which promotes the expansion of the included angle between the two driving links 312, so as to ensure that the two jaw frames 320 are in the open position. At this time, the quick loading and unloading lifting appliance 10 does not clamp the coiled material;

[0048] When clamping, the quick loading and unloading lifting appliance 10 moves as a whole above the coiled material first, and then is lowered to be in mutual contact with the coiled material, in the process, the supporting part 200 will change from the locked state to the unlocked state, and then the clamping part 300 clamps the coiled material. Specifically, in the initial stage of contact with the coiled material, the driving connecting rod 312 is in contact with the coiled material, and as the base frame 100 is lowered, the supporting part 200 will be lifted upward by the coiled material; At this moment, the double-sided tooth sleeve 222 of the movable self-locking piece 220 will cooperate with the first beveled tooth sleeve 101, the tooth surface on the first beveled tooth sleeve 101 is pressed by the upper beveled tooth 2221, and then the movable self-locking piece 220 is rotated by an angle, and the lock tongue 221 is rotated by the same angle in the limiting groove 212; Then, the base frame 100 is raised again, the supporting part 200 is lowered relative to the base frame 100, the double-sided tooth sleeve 222 of the movable self-locking piece 220 cooperates with the second beveled tooth sleeve 102, the tooth surface of the second beveled tooth sleeve 102 is pressed by the lower beveled tooth 2222, so that the movable self-locking piece 220 continues to rotate until the lock tongue 221 is completely separated from the blocking protrusion 2121; At this time, the supporting part 200 is in the unlocked state, as the base frame 100 is raised, the movable self-locking piece 220 is separated from the limiting groove 212, and the movable seat 210 is away from the auxiliary base plate 120. In this way, after being released, as shown in Figs. 13 and 14, the two clamping jaw frames 320 are close to each other under the action of gravity, so as to clamp the coiled material; Figure 9 and Figure 10 As shown in Figs. 13 and 14, the two clamping jaw frames 320 are close to each other under the action of gravity, so as to clamp the coiled material;

[0049] During the carrying, the two clamping jaw frames 320 always have a tendency to be close to each other due to the influence of gravity, so that the clamping jaw frames 320 can stably clamp the coiled material;

[0050] After being placed, the quick loading and unloading lifting appliance 10 is lowered again as a whole, so that the coiled material lifts the supporting part 200 again, the movable seat 210 is close to the auxiliary base plate 120 again, the connecting rod assembly 310 drives the clamping jaw frames 320 to open, so as to release the coiled material. At the same time, the lock tongue 221 reenters the limiting groove 212, and at this moment, the double-sided tooth sleeve 222 of the movable self-locking piece 220 cooperates with the first beveled tooth sleeve 101 again; Then, the quick loading and unloading lifting appliance 10 is raised, the double-sided tooth sleeve 222 cooperates with the second beveled tooth sleeve 102 again, under the cooperation of the tooth surfaces of the two, the movable self-locking piece 220 is rotated, so that the lock tongue 221 is clamped with the limiting groove 212 again. In this way, the clamping part 300 will remain open, that is, the quick loading and unloading lifting appliance 10 returns to the initial state.

[0051] It should be noted that the quick loading and unloading lifting appliance 10 of the present application does not need to be provided with a power source for driving the clamping part 300 to open and close, and it can be automatically opened or clamped by simple lifting action through the mechanical structure of the supporting part 200 and the use of gravity, so that energy saving is realized and the operation of the staff is facilitated.

[0052] Further, in actual work process, the lifting ring 111 of the base frame 100 is hung on the lifting hook 20 of other hoisting equipment, since the lifting ring 111 is circular, the lifting ring 111 is easy to slide relative to the lifting hook 20 during carrying; and since the volume of the foamed coiled material or the foam coiled material and the like is large and the weight is relatively light, the coiled material is greatly affected by air resistance during movement, so that the coiled material is easy to swing during carrying, and there is a safety hazard. Therefore, the base frame 100 is specially designed in the present application, and the specific design is as follows:

[0053] As shown in Figure 11 and Figure 12 , the base frame 100 is provided with a positioning assembly 130 matched with the lifting ring 111, and the positioning assembly 130 comprises a series of rods 131 fixed on the lifting ring 111 and a plurality of positioning sheets 132. Among them, the positioning sheet 132 is provided with a waist-shaped hole 1321, and the series of rods 131 passes through the waist-shaped hole 1321, and the plurality of positioning sheets 132 are arranged side by side and movably arranged on the lifting ring 111.

[0054] Preferably, the positioning sheet 132 is made of aluminum-based alloy material, and the thickness of the positioning sheet 132 is preferably 2-5 mm. The aluminum-based alloy material has the characteristics of light weight, good processing performance and low cost, which can reduce the overall weight of the base frame 100 and reduce the production cost of the added positioning assembly 130.

[0055] The positioning assembly 130 can reduce the swing phenomenon of the coiled material during carrying, and the design principle is as follows:

[0056] As shown in Figure 11 , the positioning sheet 132 falls to the bottom under the action of gravity and penetrates into the lifting ring 111, and the plurality of positioning sheets 132 are independent of each other, when the external lifting hook 20 cooperates with the lifting ring 111, as shown in Figure 12 , part of the positioning sheet 132 will be lifted. In this way, the other positioning sheets 132 that are not lifted will be supported on both sides of the lifting hook 20, and when the lifting ring 111 is inclined relative to the lifting hook 20, the positioning sheet 132 will block it, thereby preventing the lifting ring 111 from being inclined relative to the lifting hook 20, and reducing the swing degree of the coiled material during carrying.

[0057] It should be noted that compared with the anti-swing device of the prior art, the positioning assembly 130 of the present application has the advantages of simple structure, low cost and the like, and the positioning sheet 132 can be self-adaptively matched with different thicknesses of the lifting hook 20 without manual operation adjustment, and has the characteristics of convenience and the like.

[0058] Further, in actual operation, the clamping jaw frame 320 is not clamped at the center position of the coiled material, which makes the weight of the coiled material on both sides of the clamping jaw frame 320 inconsistent, resulting in that the coiled material is easy to overturn in addition to swinging during carrying. Therefore, as shown inFigure 13 As shown, the present application is provided with counterweight 140 on both sides of base frame 100, and the two counterweights 140 are distributed on the vertical plane of the central axis of lifting ring 111.

[0059] The provision of counterweight 140 can increase the weight of both sides of base frame 100, so that when the jaw frame 320 is biased, the weight difference between both sides of the base frame 100 will become smaller, and the overturning moment will also become smaller. Thus, the stability during the carrying process can be maintained as much as possible, and overturning is less likely to occur. At the same time, the counterweight 140 increases the overall weight of the quick loading and unloading lifting appliance 10, which can better overcome the air resistance during movement, and also reduces the swinging phenomenon during movement.

[0060] Preferably, as shown, Figure 13 As shown, both sides of base frame 100 are provided with hydraulic drive assembly 150, which includes hydraulic cylinder 151 and telescopic rod 152, hydraulic cylinder 151 is fixedly connected with base frame 100, and counterweight 140 is installed at the end of telescopic rod 152, and the hydraulic drive assembly 150 can adjust the distance between counterweight 140 and base frame 100. In operation, the quick loading and unloading lifting appliance 10 clamps the coil material, when the center of gravity of the coil material is biased to the left, the telescopic rod 152 of the hydraulic drive assembly 150 on the right side of the base frame 100 is elongated, or the telescopic rod 152 on the left side is shortened, so that the distance from the right counterweight 140 to the base frame 100 is greater than the distance from the left counterweight 140 to the base frame 100, thereby balancing the weight of both sides of the base frame 100, reducing the overturning moment of the quick loading and unloading lifting appliance 10, and avoiding overturning during the carrying process.

[0061] In an embodiment not shown, in order to improve the clamping capacity of clamping member 300, jaw frame 320 is provided to be adjustable in size. Specifically, cross beam 322 includes a hollow sleeve rod and an extension sleeve rod, the extension sleeve rod is movably arranged in the hollow sleeve rod, and part of arc-shaped framework 321 is arranged on the extension sleeve rod.

[0062] In use, when the length of the coil material is large, the extension sleeve rod can be pulled out of the hollow sleeve rod to lengthen the overall length of cross beam 322, thereby expanding the matching range when clamping member 300 clamps the coil material; similarly, when the length of the coil material is small, the extension sleeve rod can be compressed back into the hollow sleeve rod to shorten the overall length of cross beam 322, so that jaw frame 320 is more matched to the coil material.

[0063] In summary, the quick loading and unloading lifting appliance 10 of the present application can quickly and conveniently clamp and place the coil material, and can reduce the swinging amplitude of the coil material during the carrying process, thereby improving the convenience and safety of carrying.

[0064] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A quick attach / detach spreader characterized by, The utility model relates to a quick -mounting and dismounting lifting appliance, including: The base frame, the supporting component and the clamping component are provided with the main body and the auxiliary base plate, the main body is provided with the lifting ring, the auxiliary base plate is provided with the first bevel tooth sleeve towards the main body through the fixed rod, and the auxiliary base plate is provided with the second bevel tooth sleeve towards the main body. The supporting component includes movable seat and movable self-locking piece, the movable seat is movably connected with the auxiliary base plate through guide rod, the movable seat is provided with limiting groove, and the end of movable self-locking piece is provided with lock tongue matched with limiting groove; the movable self-locking piece is movably arranged on the auxiliary base plate, and the movable self-locking piece is provided with double-sided tooth sleeve; the double-sided tooth sleeve includes upper bevel tooth matched with the first bevel tooth sleeve and lower bevel tooth matched with the second bevel tooth sleeve; The clamping component includes link assembly and jaw frame, the link assembly is hingedly connected with the main body and the movable seat, and the link assembly drives the jaw frame to open and close to clamp the coiled material. The number of the link assembly is two groups, and two groups of the link assembly are arranged on the two sides of the base frame respectively; 2. The quick attach / detach spreader of claim 1, wherein, Each group of the link assembly includes two driven links and two driving links, one end of the driven link is hingedly connected with the main body, the other end of the driven link is hingedly connected with the end of the driving link, the driving link is rotatably arranged on the movable seat and connected with the jaw frame; and in the same vertical plane in the direction of gravity, two driven links are symmetrically arranged, and two driving links are symmetrically arranged.

3. The quick-mounting and dismounting lifting appliance according to claim 1, wherein The base frame is provided with a positioning assembly matched with the lifting ring, the positioning assembly includes a series of rods fixed on the lifting ring and a plurality of positioning pieces, the positioning pieces are provided with waist-shaped holes, the series of rods pass through the waist-shaped holes, and the plurality of positioning pieces are arranged side by side and movably arranged on the lifting ring. The positioning pieces are made of aluminum-based alloy material, and the thickness of the positioning pieces is 2-5 mm.

4. The quick attach / detach spreader of claim 3, wherein, Both sides of the base frame are provided with counterweights, and the two counterweights are distributed on the vertical plane of the central axis of the lifting ring.

5. The quick attach spreader of claim 1, wherein, Both sides of the base frame are provided with hydraulic drive assemblies, the hydraulic drive assemblies include hydraulic cylinders and telescopic rods, the hydraulic cylinders are fixedly connected with the base frame, the counterweights are mounted on the ends of the telescopic rods, and the hydraulic drive assemblies can adjust the distance between the counterweights and the base frame.

6. The quick attach spreader of claim 5, wherein, The jaw frame includes a plurality of arc skeletons and cross beams, and the plurality of arc skeletons are connected with each other through the cross beams.

7. The quick attach spreader of claim 1, wherein, The cross beam includes a hollow sleeve rod and an extension sleeve rod, the extension sleeve rod is movably arranged in the hollow sleeve rod, and part of the arc skeletons are arranged on the extension sleeve rod.

8. The quick attach spreader of claim 7, wherein, The cross section of the limiting groove is T-shaped structure, the groove wall of the limiting groove forms a blocking convex rib, and the lock tongue is matched with the limiting groove.

9. The quick attach spreader of claim 1, wherein, ​ The limiting groove and the lock tongue have a locking state and an unlocking state. When the locking state, the lock tongue is accommodated in the limiting groove and is clamped with the blocking convex rib. When the unlocking state, the lock tongue is separated from the limiting groove.

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