Folding lifting appliance

Abstract

The invention belongs to the technical field of lifting equipment, and particularly relates to a folding lifting appliance which comprises a main lifting beam, lifting mechanisms are symmetrically arranged on the main lifting beam close to the left and right positions, lifting belts are mounted on the left and right lifting mechanisms, swing mechanisms are mounted on the main lifting beam close to the left and right edges, and end beams are mounted at the lower side ends of the swing mechanisms. Locking mechanisms are arranged on the main hanging beams corresponding to the end beams, the locking mechanisms limit and fix the end beams, clamping mechanisms are installed between the ends of the two sides of the end beams, and handle mechanisms are installed at the front ends and the rear ends of the clamping mechanisms; according to the lifting appliance, the end beam can rotate through the slewing mechanism, so that the lifting appliance can conveniently and rapidly switch the storage state and is convenient to store, then the lifting appliance can be rapidly connected with a lifted product through the clamping mechanism, the lifting efficiency is improved, the problem that a traditional hand wheel is large in occupied space is solved through the foldable handle mechanism, the storage space is greatly saved, and the lifting appliance is lighter in weight and convenient to use. The transportation cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting equipment, in particular to a folding hoist. Background Art

[0002] A sling is a device used in lifting machinery to lift heavy objects. The most commonly used slings for lifting bulk items are hooks and slings, while others include lifting rings, suction cups, clamps, and forks. They are widely used in the lifting and hoisting industry.

[0003] As an important component of lifting and transportation machinery, slings are used to cooperate with crane hooks to lift heavy objects. To facilitate the transportation and storage of slings, slings need to be foldable or detachable.

[0004] At present, conventional traditional I-shaped spreaders are large in size, cannot be folded, and are inconvenient to transport. In addition, it is difficult to connect the spreader with the product, and the lifting preparation time is long, which reduces work efficiency. At the same time, traditional I-shaped spreaders are heavy, resulting in high transportation costs. Therefore, we proposed a foldable spreader to solve the above problems. Summary of the Invention

[0005] (1) Technical problems solved In view of the deficiencies in the prior art, the present invention provides a foldable sling that solves the problems raised in the above-mentioned background technology.

[0006] (2) Technical solution In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A folding sling comprises a main beam, wherein lifting mechanisms are symmetrically arranged near the left and right positions of the main beam, and slings are installed on the left and right lifting mechanisms, a slewing mechanism is installed near the left and right edge positions of the main beam, and end beams are installed on the lower end heads of the slewing mechanism, a locking mechanism is provided on the main beams corresponding to the end beams, and the locking mechanism limits and fixes the end beams, a clamping mechanism is installed between the two side ends of the end beam, and handle mechanisms are installed on the front and rear end heads of the clamping mechanism.

[0007] Furthermore, the main suspension beam includes a box beam and a blocking plate. The left and right ends of the box beam are fixedly welded with blocking plates. The box beam is made of 5mm thick steel plates that are bent and welded, and its cross-sectional size is 140mm×90mm.

[0008] Furthermore, the lifting mechanism includes a lifting plate, a lifting hole, a first pin assembly, a fork frame and a second pin assembly. The lifting plate is fixedly welded between the upper and lower side walls of the box beam. A lifting hole is provided on the lifting plate near the upper side. A fork frame is installed in the lifting hole through the first pin assembly. The fork frame is connected to the sling through the second pin assembly.

[0009] Furthermore, the hanging holes are arranged on the upper surface of the main hanging beam, and 5 hanging holes are evenly arranged on the left and right.

[0010] Furthermore, the slewing mechanism includes a first slewing sleeve, a second slewing sleeve, a slewing pin, a positioning cone, a first locking nut and a gasket. The first slewing sleeve is fixedly welded between the upper and lower side walls of the box beam, and the second slewing sleeve is fixedly installed in the middle position of the end beam. The slewing pin is inserted into the second slewing sleeve and the first slewing sleeve from top to bottom in sequence. The lower surface of the end beam corresponding to the slewing pin is installed with a positioning cone, and the upper surface of the slewing pin is threadedly installed with a first locking nut, and a gasket is arranged between the lower surface of the first locking nut and the upper surface of the main suspension beam.

[0011] Furthermore, the locking mechanism includes a locking sleeve, a core shaft, a first telescopic spring, a fixing pin, a wedge slider, a first handle, a fixing plate, a storage hole and a locking hole. The locking sleeve is fixedly welded between the upper and lower side walls of the box beam, a core shaft is inserted into the locking sleeve, and a first telescopic spring is fixedly installed between the core shaft and the inner wall of the locking sleeve. A wedge slider is installed on the upper surface of the core shaft through a fixing pin, and the lower surface of the wedge slider is inclined to the upper surface of the locking sleeve. The first handle is fixedly installed on the wedge slider, and the fixing plate is fixedly installed on the upper surface of the end beam. Two storage holes are provided on the front and rear positions of the fixing plate, and a locking hole is provided on the left side of the fixing plate.

[0012] Furthermore, a polytetrafluoroethylene plate is fixedly mounted on the upper surface of the fixing plate, and through holes are provided on the polytetrafluoroethylene plate at positions corresponding to the storage holes and the locking holes.

[0013] Furthermore, the cross section of the core shaft is a convex structure, and the first telescopic spring is fixedly mounted on the convex table surface mounted on the core shaft.

[0014] Furthermore, the clamping mechanism includes a support, a first screw, a bearing assembly, a bolt rod, a threaded sleeve, a slide, a guide pin and a hanging ear pin. Two supports are provided, and the supports are installed on the end heads on both sides of the upper surface of the end beam through the first screw. A bolt rod is installed between the supports through the bearing assembly, and the threads on the end heads on both sides of the bolt rod are mirror-imaged. Slides are installed on the end heads on both sides of the bolt rod through threaded sleeves. A guide pin is movably inserted in the slide, and the guide pin is fixedly installed on both sides of the end beam. Hanging ear pins are installed on the slide.

[0015] Furthermore, the handle mechanism includes a handle body, a spring pin, a molded hole, a second screw, a connecting rod, a second handle, a second locking nut, a stopper and a second telescopic spring. The handle body is installed on the end of the bolt rod through the spring pin, and a molded hole is provided on the other end of the handle body. A connecting rod is installed in the molded hole through the second screw. The outer surface of the connecting rod is movably mounted on the second handle, and a second locking nut and a stopper are installed on the lower end of the connecting rod in sequence from bottom to top. A second telescopic spring is arranged between the upper surface of the stopper and the upper inner wall of the second handle.

[0016] (3) Beneficial effects Compared with the prior art, the present invention provides a foldable sling with the following beneficial effects: The present invention enables the end beam to rotate through a slewing mechanism, and then limits the position between the end beam and the main lifting beam through a locking mechanism, so that the sling has two states: lifting and storage. The sling can be quickly switched to the storage state for easy storage. The clamping mechanism can be quickly connected to the suspended product to improve the lifting efficiency. The foldable handle mechanism solves the problem of traditional handwheels occupying a large space, greatly saves storage space, makes the sling lighter, and reduces transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main view structure of the present invention in use state; Figure 2 This is a schematic diagram of the structure of the present invention in the main view storage state; Figure 3 This is a schematic diagram of the structure of the present invention in the storage state from the left side; Figure 4 This is a schematic diagram of the cross-sectional structure of the main suspension beam of the present invention; Figure 5 This is a schematic structural diagram of the clamping mechanism of the present invention; Figure 6 It is a schematic cross-sectional view of the rotary mechanism of the present invention; Figure 7 This is a schematic diagram of the top view of the end beam structure of the present invention; Figure 8 This is a schematic diagram of the storage structure of the handle mechanism of the present invention; Figure 9 This is a schematic diagram of the cross-sectional structure of the handle mechanism of the present invention; Figure 10 This is a schematic structural diagram of the handle mechanism of the present invention in an unfolded state; Figure 11 This is a schematic diagram of the main structure of the handle of the present invention.

[0018] In the figure: 1. Main lifting beam; 101. Box beam; 102. Blocking plate; 2. Lifting mechanism; 201. Lifting plate; 202. Lifting hole; 203. First pin assembly; 204. Fork frame; 205. Second pin assembly; 3. Lifting belt; 4. Rotating mechanism; 401. First rotating sleeve; 402. Second rotating sleeve; 403. Rotating pin; 404. Positioning cone; 405. First locking nut; 406. Washer; 5. End beam; 6. Locking mechanism; 601. Locking sleeve; 602. Mandrel; 603. First telescopic spring; 604. Fixing pin; 605. Wedge slider; 606. First handle; 607, fixing plate; 608, storage hole; 609, locking hole; 7, clamping mechanism; 701, support; 702, first screw; 703, bearing assembly; 704, bolt rod; 705, threaded sleeve; 706, slide; 707, guide pin; 708, ear pin; 8, handle mechanism; 801, handle body; 802, spring pin; 803, mold hole; 804, second screw; 805, connecting rod; 806, second handle; 807, second locking nut; 808, block; 809, second telescopic spring; 9, polytetrafluoroethylene plate; 10, through hole. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0020] like Figures 1-11 As shown, a folding sling proposed in one embodiment of the present invention includes a main suspension beam 1, a lifting mechanism 2 is symmetrically arranged near the left and right positions of the main suspension beam 1, and a sling 3 is installed on the left and right lifting mechanisms 2, and the lengths of the left and right slings 3 are the same, a slewing mechanism 4 is installed near the left and right edge positions of the main suspension beam 1, and an end beam 5 is installed on the lower end of the slewing mechanism 4, a locking mechanism 6 is provided on the main suspension beam 1 corresponding to the end beam 5, and the locking mechanism 6 limits and fixes the end beam 5, a clamping mechanism 7 is installed between the two side ends of the end beam 5, and a handle mechanism 8 is installed on the front and rear end ends of the clamping mechanism 7.

[0021] like Figure 4 As shown, in some embodiments, the main suspension beam 1 includes a box beam 101 and a blocking plate 102. The left and right ends of the box beam 101 are fixedly welded with blocking plates 102. The box beam 101 is made of 5 mm thick steel plate by bending and welding, and its cross-sectional size is 140 mm × 90 mm.

[0022] In this embodiment, the box beam 101 and the left and right blocking plates 102 can constitute the main suspension beam 1 and facilitate the fixed installation of the lifting mechanism 2, the slewing mechanism 4 and the locking mechanism 6.

[0023] like Figure 1 As shown, in some embodiments, the lifting mechanism 2 includes a lifting plate 201, a lifting hole 202, a first pin assembly 203, a fork frame 204 and a second pin assembly 205. The lifting plate 201 is fixedly welded between the upper and lower side walls of the box beam 101. A lifting hole 202 is provided on the lifting plate 201 near the upper side. A fork frame 204 is installed in the lifting hole 202 through the first pin assembly 203. The fork frame 204 is connected to the sling 3 through the second pin assembly 205.

[0024] In this embodiment, the fork frame 204 is installed in the lifting hole 202 on the lifting plate 201 through the first pin assembly 203, and the fork frame 204 is connected and fixed to the sling 3 through the second pin assembly 205, thereby achieving the effect of installing the sling 3.

[0025] like Figure 4 As shown, in some embodiments, the hanging holes 202 are set on the upper surface of the main hanging beam 1, and 5 hanging holes 202 are evenly opened on the left and right.

[0026] In this embodiment, the five lifting holes 202 satisfy the effect of left and right adjustment of the fork frame 204 on the main lifting beam 1. By adjusting the positions of different lifting holes 202 of the fork frame 204 on the main lifting beam 1, the center of mass of the suspended product can be adapted to changes within a range of ±100 mm.

[0027] like Figure 6 As shown, in some embodiments, the rotating mechanism 4 includes a first rotating sleeve 401, a second rotating sleeve 402, a rotating pin 403, a positioning cone 404, a first locking nut 405 and a gasket 406. The first rotating sleeve 401 is fixedly welded between the upper and lower side walls of the box beam 101, and the second rotating sleeve 402 is fixedly installed in the middle position of the end beam 5. The rotating pin 403 is inserted into the second rotating sleeve 402 and the first rotating sleeve 401 from top to bottom in sequence. The lower surface of the end beam 5 corresponding to the rotating pin 403 is installed with a positioning cone 404, and the upper surface of the rotating pin 403 is threadedly installed with a first locking nut 405, and a gasket 406 is arranged between the lower surface of the first locking nut 405 and the upper surface of the main suspension beam 1.

[0028] In this embodiment, the first locking nut 405 and the gasket 406 limit and fix the upper end of the swivel pin 403, so that the swivel pin 403 can be movably installed in the first swivel sleeve 401 and the second swivel sleeve 402, so that the end beam 5 can rotate along the swivel pin 403, and the positioning cone 404 is located in the positioning hole above the suspended object, which is used for initial positioning of the sling.

[0029] like Figure 6 and Figure 7 As shown, in some embodiments, the locking mechanism 6 includes a locking sleeve 601, a core shaft 602, a first telescopic spring 603, a fixing pin 604, a wedge slider 605, a first handle 606, a fixing plate 607, a storage hole 608 and a locking hole 609. The locking sleeve 601 is fixedly welded between the upper and lower side walls of the box beam 101, the core shaft 602 is inserted into the locking sleeve 601, and a first telescopic spring 603 is fixedly installed between the core shaft 602 and the inner wall of the locking sleeve 601. A telescopic spring 603, a wedge slider 605 is installed on the upper surface of the core shaft 602 through a fixing pin 604, and the lower surface of the wedge slider 605 is inclined to fit the upper surface of the locking sleeve 601, a first handle 606 is fixedly installed on the wedge slider 605, and the fixing plate 607 is fixedly installed on the upper surface of the end beam 5, two storage holes 608 are opened at the front and rear positions on the fixing plate 607, and a locking hole 609 is opened at the left position on the fixing plate 607.

[0030] In this embodiment, the first handle 606 drives the wedge slider 605 to rotate along the upper surface of the locking sleeve 601, so that the wedge slider 605 drives the core shaft 602 to rotate and move up and down, so that the core shaft 602 moves up and down in the locking sleeve 601. When the end beam 5 and the main suspension beam 1 are arranged in a cross shape, the core shaft 602 is inserted into the locking hole 609. When the end beam 5 and the main suspension beam 1 are arranged in parallel up and down, the core shaft 602 is inserted into the storage hole 608, thereby fixing the position between the main suspension beam 1 and the end beam 5.

[0031] like Figure 5 As shown, in some embodiments, a polytetrafluoroethylene plate 9 is fixedly mounted on the upper surface of the fixing plate 607 , and through holes 10 are provided on the polytetrafluoroethylene plate 9 at positions corresponding to the storage holes 608 and the locking holes 609 .

[0032] In this embodiment, the polytetrafluoroethylene plate 9 prevents collision between the upper surface of the end beam 5 and the lower surface of the main suspension beam 1, and the through hole 10 meets the requirements of the core shaft 602 moving up and down, so that the core shaft 602 can be inserted into the storage hole 608 and the locking hole 609.

[0033] like Figure 6As shown, in some embodiments, the cross section of the core shaft 602 is a convex structure, and the first telescopic spring 603 is fixedly installed on the convex table mounted on the core shaft 602.

[0034] In this embodiment, the convex surface of the core shaft 602 facilitates the fixation of the first telescopic spring 603 , so that the first telescopic spring 603 can stably push the core shaft 602 to move downward, thereby preventing the core shaft 602 from moving up and down at will.

[0035] like Figure 5 As shown, in some embodiments, the clamping mechanism 7 includes a support 701, a first screw 702, a bearing assembly 703, a bolt rod 704, a threaded sleeve 705, a slide 706, a guide pin 707 and a hanging ear pin 708. Two supports 701 are provided, and the supports 701 are installed on the end heads on both sides of the upper surface of the end beam 5 through the first screw 702. The bolt rod 704 is installed between the supports 701 through the bearing assembly 703, and the threads on the end heads on both sides of the bolt rod 704 are mirror-imaged. Slides 706 are installed on the end heads on both sides of the bolt rod 704 through threaded sleeves 705. A guide pin 707 is movably inserted in the slide 706. The guide pin 707 is fixedly installed on both sides of the end beam 5. Hanging ear pins 708 are installed on the slide 706.

[0036] In this embodiment, the bolt rod 704 rotates in the bearing assembly 703 in the front and rear supports 701. The rotation of the bolt rod 704 causes the front and rear mirror-set threads to drive the threaded sleeve 705 to move forward and backward. The front and rear threaded sleeves 705 drive the slide 706 to move along the guide pin shaft 707, so that the front and rear slides 706 drive the front and rear hanging ear pin shafts 708 to move toward each other, so that the front and rear hanging ear pin shafts 708 clamp the product.

[0037] like Figure 8 As shown, in some embodiments, the handle mechanism 8 includes a handle body 801, a spring pin 802, a molded hole 803, a second screw 804, a connecting rod 805, a second handle 806, a second locking nut 807, a stopper 808 and a second telescopic spring 809. The handle body 801 is installed on the end of the bolt rod 704 through the spring pin 802. A molded hole 803 is provided on the other end of the handle body 801. A connecting rod 805 is installed in the molded hole 803 through the second screw 804. The outer surface of the connecting rod 805 is movably sleeved on the second handle 806. The second locking nut 807 and the stopper 808 are installed on the lower end of the connecting rod 805 from bottom to top. A second telescopic spring 809 is arranged between the upper surface of the stopper 808 and the upper inner wall of the second handle 806.

[0038] In this embodiment, the second handle 806 is pulled toward the downward side, the second handle 806 is disengaged from the molded hole 803, and the second handle 806 is rotated horizontally ninety degrees along the second screw 804 to a horizontal state. The second telescopic spring 809 pushes the second handle 806 to be inserted horizontally into the molded hole 803, thereby achieving the effect of unfolding the second handle 806, so that the second handle 806 drives the bolt rod 704 through the handle body 801. When the second handle 806 needs to be stored, the second handle 806 is disengaged from the molded hole 803, and the second handle 806 is rotated downward ninety degrees along the second screw 804 to a vertical state. The second telescopic spring 809 pushes the second handle 806 upward to be inserted into the molded hole 803, thereby achieving the effect of folding and contracting the second handle 806. The cross-section of the molded hole 803 is larger inside and smaller outside.

[0039] When in use, the fork frame 204 in the lifting mechanism 2 is installed in the lifting hole 202 at the appropriate position on the lifting plate 201 through the first pin assembly 203, and the two slings 3 of the same length are installed on the fork frame 204 through the second pin assembly 205 respectively. The slewing pin 403 in the slewing mechanism 4 can be in the first slewing sleeve 401 and the second slewing sleeve 402, so that the end beam 5 can rotate along the slewing pin 403, so that the end beam 5 and the main lifting beam 1 form a cross-shaped structure, and then the first handle 606 in the locking mechanism 6 drives the wedge slider 605 to rotate along the upper surface of the locking sleeve 601, so that the wedge slider 605 drives the core shaft 602 to rotate and move downward , so that the core shaft 602 moves downward in the locking sleeve 601, and the core shaft 602 is inserted into the locking hole 609 in the fixing plate 607, so as to achieve the effect of limiting the end beam 5, and then the positioning cone 404 is aligned with the center of the product to be lifted. The handle mechanism 8 drives the bolt rod 704 in the clamping mechanism 7 to rotate in the bearing assembly 703 in the front and rear supports 701. The rotation of the bolt rod 704 causes the front and rear mirror-set threads to drive the threaded sleeve 705 to move forward and backward, and the front and rear threaded sleeves 705 drive the slide 706 to move along the guide pin shaft 707, so that the front and rear slides 706 drive the front and rear hanging ear pin shafts 708 to move toward each other, so that the front and rear hanging ear pin shafts 708 clamp the product, and the lifting is completed. After completion, the clamping mechanism 7 is reset through the handle mechanism 8, and the second handle 806 in the handle mechanism 8 is disengaged from the molded hole 803, so that the second handle 806 is rotated downward by 90 degrees along the second screw 804 to a vertical state, and the second telescopic spring 809 pushes the second handle 806 upward to be inserted into the molded hole 803, so as to achieve the effect of folding and contracting the second handle 806, and then the first handle 606 in the locking mechanism 6 is rotated in the opposite direction, and the first handle 606 drives the wedge slider 605 to rotate in the opposite direction along the upper surface of the locking sleeve 601, so that the wedge slider 605 drives the core shaft 602 to move upward, so that the core shaft 602 moves upward in the locking sleeve 601, and the core shaft 602 is disengaged from the fixed The locking hole 609 in the plate 607 is then used to rotate the end beam 5 through the rotary pin shaft 403, and the end beam 5 is horizontal with the main beam 1. The core shaft 602 is then inserted into the storage hole 608, and the position between the main beam 1 and the end beam 5 is fixed through the locking mechanism 6. The sling 3 is placed on the upper surface of the main beam 1 to complete the folding of the sling, so that the sling has two states: hoisting and storage. The sling is easy to quickly switch to the storage state, convenient for storage, and can be quickly connected to the hoisted product, thereby improving the hoisting efficiency. The foldable handle mechanism 8 solves the problem of the traditional handwheel occupying a large space, greatly saves storage space, makes the sling lighter, and reduces transportation costs.

[0040] To sum up, the foldable sling can rotate the end beam 5 through the slewing mechanism 4, so that the sling can be quickly switched to the storage state and convenient for storage. It can then be quickly connected to the suspended product through the clamping mechanism 7, thereby improving the lifting efficiency. The foldable handle mechanism 8 solves the problem of the traditional handwheel taking up a large space, greatly saves storage space, makes the sling lighter, and reduces transportation costs.

[0041] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A foldable sling comprising a main sling beam (1), characterized in that: The main lifting beam (1) is symmetrically provided with lifting mechanisms (2) near the left and right positions, and the left and right lifting mechanisms (2) are both installed with lifting belts (3), the main lifting beam (1) is provided with slewing mechanisms (4) near the left and right edge positions, and the lower end heads of the slewing mechanisms (4) are both installed with end beams (5), the main lifting beams (1) corresponding to the end beams (5) are both provided with locking mechanisms (6), and the locking mechanisms (6) limit and fix the end beams (5), a clamping mechanism (7) is installed between the two side ends of the end beam (5), and a handle mechanism (8) is installed on the front and rear end heads of the clamping mechanism (7).

2. A foldable sling according to claim 1, characterized in that: The main suspension beam (1) comprises a box beam (101) and a blocking plate (102), the blocking plates (102) being fixedly welded to the left and right ends of the box beam (101), and the box beam (101) is formed by bending and welding 5 mm thick steel plates, and its cross-sectional dimensions are 140 mm × 90 mm.

3. The foldable sling according to claim 1, characterized in that: The lifting mechanism (2) comprises a lifting plate (201), a lifting hole (202), a first pin assembly (203), a fork frame (204) and a second pin assembly (205); the lifting plate (201) is fixedly welded between the upper and lower side walls of the box beam (101); a lifting hole (202) is provided on the lifting plate (201) near the upper side; a fork frame (204) is installed in the lifting hole (202) via the first pin assembly (203); and the fork frame (204) is connected to the sling (3) via the second pin assembly (205).

4. A foldable sling according to claim 3, characterized in that: The hanging holes (202) are arranged on the upper surface of the main hanging beam (1), and five hanging holes (202) are evenly arranged on the left and right sides.

5. The foldable sling according to claim 1, characterized in that: The slewing mechanism (4) includes a first slewing sleeve (401), a second slewing sleeve (402), a slewing pin (403), a positioning cone (404), a first locking nut (405) and a gasket (406), wherein the first slewing sleeve (401) is fixedly welded between the upper and lower side walls of the box beam (101), the second slewing sleeve (402) is fixedly installed in the middle position of the end beam (5), the slewing pin (403) is inserted into the second slewing sleeve (402) and the first slewing sleeve (401) in sequence from top to bottom, the lower surface of the end beam (5) corresponding to the slewing pin (403) is installed with a positioning cone (404), the upper surface of the slewing pin (403) is threadedly installed with a first locking nut (405), and a gasket (406) is provided between the lower surface of the first locking nut (405) and the upper surface of the main suspension beam (1).

6. The foldable sling according to claim 1, characterized in that: The locking mechanism (6) comprises a locking sleeve (601), a core shaft (602), a first telescopic spring (603), a fixing pin (604), a wedge slider (605), a first handle (606), a fixing plate (607), a storage hole (608) and a locking hole (609), wherein the locking sleeve (601) is fixedly welded between the upper and lower side walls of the box beam (101), the core shaft (602) is inserted into the locking sleeve (601), and the first telescopic spring is fixedly installed between the core shaft (602) and the inner wall of the locking sleeve (601). Spring (603), a wedge slider (605) is installed on the upper surface of the core shaft (602) through a fixing pin (604), and the lower surface of the wedge slider (605) is inclined to fit the upper surface of the locking sleeve (601), a first handle (606) is fixedly installed on the wedge slider (605), the fixing plate (607) is fixedly installed on the upper surface of the end beam (5), two storage holes (608) are opened at the front and rear positions on the fixing plate (607), and a locking hole (609) is opened at the left position on the fixing plate (607).

7. The foldable sling according to claim 6, characterized in that: A polytetrafluoroethylene plate (9) is fixedly mounted on the upper surface of the fixing plate (607), and through holes (10) are provided on the polytetrafluoroethylene plate (9) at positions corresponding to the storage hole (608) and the locking hole (609).

8. The foldable sling according to claim 6, characterized in that: The cross section of the core shaft (602) is a convex structure, and the first telescopic spring (603) is fixedly mounted on the convex table surface mounted on the core shaft (602).

9. The foldable sling according to claim 1, characterized in that: The clamping mechanism (7) includes a support (701), a first screw (702), a bearing assembly (703), a bolt rod (704), a threaded sleeve (705), a slide (706), a guide pin (707) and a lug pin (708). Two supports (701) are provided, and the supports (701) are installed on the ends of the upper surface of the end beam (5) on both sides through the first screw (702). A bolt rod (704) is installed between the supports (701) through the bearing assembly (703), and the threads on the ends of the two sides of the bolt rod (704) are mirror-imaged. Slides (706) are installed on the ends of both sides of the bolt rod (704) through the threaded sleeve (705). A guide pin (707) is movably inserted in the slide (706). The guide pin (707) is fixedly installed on both sides of the end beam (5). Lug pins (708) are installed on the slide (706).

10. The foldable sling according to claim 1, characterized in that: The handle mechanism (8) comprises a handle body (801), a spring pin (802), a shaped hole (803), a second screw (804), a connecting rod (805), a second handle (806), a second locking nut (807), a stopper (808) and a second telescopic spring (809), wherein the handle body (801) is mounted on the end of the bolt rod (704) via the spring pin (802), a shaped hole (803) is provided on the other end of the handle body (801), a connecting rod (805) is mounted in the shaped hole (803) via the second screw (804), an outer surface of the connecting rod (805) is movably sleeved on the second handle (806), a second locking nut (807) and a stopper (808) are mounted on the lower end of the connecting rod (805) in order from bottom to top, and a second telescopic spring (809) is provided between the upper surface of the stopper (808) and the upper inner wall of the second handle (806).

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