Foldable dust cover of forward overturning lifting appliance

Abstract

The invention provides a foldable dust cover of a forward overturning lifting appliance, and relates to the technical field of overturning lifting appliances. The invention discloses a foldable dust cover of a forward turning lifting appliance. Comprising a container, a lifting appliance body, a dustproof cloth bag, a plurality of groups of first clamping belts, a plurality of groups of second clamping belts, a first rotating shaft, a connecting rod, a gear box, a second rotating shaft, a fourth rotating shaft, a third rotating shaft, a first swing rod, a second swing rod, a first stop lever, a second stop lever, a first folding rod, a second folding rod, a first incomplete gear, a second incomplete gear, a complete gear and a counterweight sliding sleeve. According to the invention, the extension section can be prepared into various lengths, the appropriate length can be selected according to specific requirements on site, the extension piece is hung on the hanging buckle on the outer wall of the dustproof cloth bag through the chip after the selection is completed, the mounting and the dismounting are very convenient, the dustproof height of the dustproof cloth bag is increased through the extension section, and the effect is very good.

Description

Technical Field

[0001] The invention relates to the technical field of flip slings, in particular to a foldable dust cover of a forward flip sling. Background Art

[0002] The flipping mechanism of the existing flipping sling is used to drive the hanger to flip, and the hanger is used to hang the container or other loading device. When the flipping mechanism drives the hanger to flip, the container or loading device also flips with the hanger. When the loading device flips to the unloading position, the material in the loading device enters the interior of the dust cover from the unloading port under the action of gravity, and then is discharged to the predetermined position through the dust cover. The dust cover can suppress dust and reduce the risk of dust in the material drifting around and polluting the environment. For example, there are multiple technologies in the prior art that disclose flipping slings and lifting equipment, but the height of the dust cover is usually fixed. If the height of the drop needs to be adjusted to achieve the best dust prevention effect, the height of the dust cover cannot be adjusted or needs to be replaced, which is time-consuming and labor-intensive. For this reason, there is a public technology on the market that proposes a dustproof flipping sling and lifting equipment, which involves the technical field of lifting equipment. The dustproof flip hanger includes a support frame, a lifting frame is horizontally hinged on the support frame, a flip driving mechanism is installed on the support frame, the flip driving mechanism is used to drive the lifting frame to flip relative to the support frame so that the lifting frame is in a lifting position or a dumping position, a grabbing mechanism is installed on the lifting frame, the grabbing mechanism is used to grab the loading device, and a dust cover and an adjusting mechanism are also installed on the lifting frame, the feed port of the dust cover is connected to the discharge port of the loading device, and the adjusting mechanism is used to adjust the height of the discharge port of the dust cover. In the disclosed technology, the dust-proof flip hanger can adjust the height of the dust cover to meet the dust-proof requirements of different drop heights. The technology is specifically to drive the winch to rotate, reel in or unreel the lifting rope, and then drive the folding support frame at the other end of the lifting rope to rise and fall. A gravity frame is fixed to the outer wall of the dust cover and the dust cover located below the gravity frame bypasses the folding support frame and then hangs down. The technical specification states that when the folding support frame rises, it can drive the dust cover to rise to shorten the length, and when it falls, it drives the dust cover to fall to extend the length. It can be seen from its description that the dust cover and the folding support frame are slidably connected, the lifting rope is located on the outer wall of the dust cover and the folding support frame is located inside the dust cover. If the lifting rope is to drive the folding support frame to move up and down, a hole must be opened in the outer wall of the dust cover for the lifting rope to pass through. In order to prevent the dust cover from being interfered with in adjusting the height up and down, the rope threading hole must be a long strip opened in the up and down direction, resulting in the dust cover not being able to play a dust-proof role, and the structure is too complicated and difficult to achieve. In summary, it is necessary to improve the foldable dust cover structure of the forward flip spreader to meet the requirements of dustproof height adjustment. Summary of the invention

[0003] Technical issues solved In view of the shortcomings of the prior art, the present invention provides a foldable dust cover for a forward-flipping sling, which solves the problems in the prior art that the outer wall of the height-adjustable dust cover is opened with long strips of holes, resulting in the dust cover failing to play a dust-proof role, and the structure is too complicated and difficult to implement.

[0004] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a foldable dust cover for a forward-flipping sling, comprising a container, a sling body, a dust bag, multiple groups of first entrainment belts, multiple groups of second entrainment belts, a first rotating shaft, a connecting rod, a gear box, a second rotating shaft, a fourth rotating shaft, a third rotating shaft, a first swing rod, a second swing rod, a first gear bar, a second gear bar, a first folding rod, a second folding rod, a first incomplete gear, a second incomplete gear, a complete gear and a counterweight sliding sleeve, wherein the gear box, the second rotating shaft, the fourth rotating shaft, the third rotating shaft, the first swing rod, the second swing rod, the first gear bar, the second gear bar, the first folding rod, the second folding rod, the first incomplete gear, the second incomplete gear and the complete gear constitute two groups of folding and unfolding mechanisms for opening or folding the dust bag when the sling body is flipped, and the counterweight sliding sleeve The first and second baffles are connected in a sliding manner to the outer walls of the two groups of first swing arms and are rotatably connected to the first rotating shaft through a connecting rod. The first baffle rod and the second baffle rod drive the front wall and the rear wall of the dust bag to open and fold through multiple groups of first clamping belts. The first folding rod and the second folding rod drive the left and right side walls of the dust bag to open and fold through multiple groups of second clamping belts. An extension section is suspended on the outer wall of the dust bag away from the sling body through a hook structure. A magnetic structure for adsorption and fixation to maintain a dustproof effect is provided between the inner wall of the extension section and the outer wall of the dust bag. A linkage structure is provided between the outer wall of the extension section and the outer wall of the dust bag for driving the extension section to open synchronously when the folding and unfolding structure drives the dust bag to open. The lower mouth of the extension section is provided with an inwardly rolled edge, and the inner wall of the edge is provided with a counterweight structure for keeping the extension section drooping.

[0005] Preferably, the dustproof cloth bag and the extension section are both made of waterproof and wear-resistant synthetic cloth.

[0006] Preferably, the left and right side walls of the dust bag are both provided with a first Y-shaped fold, and the left and right side walls of the extension section are both provided with a vertical second fold, and the upper ends of the two second folds are respectively aligned with the lower ends of the two first folds.

[0007] Preferably, the hook structure includes multiple groups of buckles and code plates, the multiple groups of buckles are arranged in a ring shape on the outer wall of the dustproof cloth bag and are close to the lower port of the dustproof cloth bag, the multiple groups of code plates are fixedly connected to the inner wall of the extension section and are respectively opposite to the inside and outside of the multiple groups of buckles, and the extension section is fixed to the buckles through the multiple groups of code plates.

[0008] Preferably, the magnetic attraction structure includes a first magnetic strip and a second magnetic strip, the first magnetic strip and the second magnetic strip are respectively arranged on the dustproof cloth bag and the opposite side of the extension section and are both located below the hook structure, the first magnetic strip and the second magnetic strip have the same horizontal height and opposite magnetic properties on the opposite side, and the first magnetic strip and the second magnetic strip are both multi-segment splicing structures.

[0009] Preferably, the first magnetic stripe and the second magnetic stripe are both formed by splicing multiple sections of soft magnetic stripes.

[0010] Preferably, the linkage structure includes a fixed bag, a cloth belt ring and a linkage rod, the fixed bag is fixedly connected to the outer wall of the extension section, the cloth belt ring is fixedly connected to the outer wall of the dustproof cloth bag and is opposite to the fixed bag up and down, the linkage rod is fixedly connected to the inner wall of the fixed bag, the upper end of the linkage rod passes through the upper wall of the fixed bag and extends toward the top of the fixed bag, and the end of the linkage rod extending above the fixed bag passes between the cloth belt ring and the dustproof cloth bag.

[0011] Preferably, the counterweight structure comprises a plurality of groups of counterweight rods, and the plurality of groups of counterweight rods are sequentially arranged on the inner side wall of the curling edge with their ends abutting against each other.

[0012] Beneficial Effects The present invention provides a foldable dust cover for a forward-flipping sling. It has the following beneficial effects: 1. Compared with the prior art, the foldable dust cover of the forward flip sling can be prepared in various lengths of extension sections. The appropriate length can be selected according to the specific needs of the site. After the selection is completed, the extension piece is hung on the hook on the outer wall of the dust bag through the code piece. The installation and disassembly are very convenient. The dustproof height of the dust bag is extended by the extension section, and the effect is very good.

[0013] 2. Compared with the prior art, the foldable dust cover of the forward flip hanger can maintain the sealing effect when the extension section is installed on the outer wall of the dust bag through the first magnetic strip and the second magnetic strip, thereby preventing dust from leaking from the connection.

[0014] 3. Compared with the prior art, the foldable dust cover of the forward flip sling has a second fold on the left and right side walls of the extension section corresponding to the first fold on the left and right sides of the outer wall of the dust bag. At the same time, a plurality of linkage rods linked with the dust bag are arranged on the outer wall of the extension section. When the folding and unfolding mechanism drives the dust bag to open and fold, the extension section can be driven to perform synchronous action, which is very convenient to use. A plurality of counterweight sections are arranged at the lower mouth of the extension section to keep the vertical direction of the lower mouth of the extension section from being disturbed by wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure from the left front view when the discharge port of the sling body of the present invention is perpendicular to the horizontal plane; Figure 2 For the present invention Figure 1A partial enlarged view of the middle A; Figure 3 It is a partial sectional view of the internal structure of the gearbox of the present invention; Figure 4 It is a schematic diagram of the side structure of the second incomplete gear of the present invention; Figure 5 It is a partial side view of the connection structure between the sling body and the dust bag when the discharge port of the sling body of the present invention is parallel to the horizontal plane; Figure 6 For the present invention Figure 5 A partial enlarged view of point B in the middle; Figure 7 It is a partial schematic diagram of the connection structure between the first gear lever and the first folding lever of the present invention; Figure 8 It is a partial cross-sectional schematic diagram of the dustproof cloth bag and the extension section of the present invention when they are connected through a hook structure; Fig. 9 It is a partial schematic diagram of the dustproof cloth bag, the hanging buckle and the first magnetic strip connection structure of the present invention; Fig.10 It is a partial schematic diagram of the connection structure of the extension section, the code piece and the second magnetic strip of the present invention; Fig.11 It is a partial cross-sectional view of the connection structure between the lower port of the extension section and the counterweight rod of the present invention.

[0016] Among them, 1. container; 2. spreader body; 3. dust bag; 4. first rotating shaft; 5. connecting rod; 6. gear box; 7. second rotating shaft; 8. third rotating shaft; 9. first swing rod; 10. second swing rod; 11. counterweight sliding sleeve; 12. first gear rod; 13. second gear rod; 14. fourth rotating shaft; 15. first incomplete gear; 16. second incomplete gear; 17. complete gear; 18. locking arc groove; 19. first clamping belt; 20. first folding rod; 21. second folding rod; 22. second clamping belt; 23. first crease; 24. rotating sleeve; 25. rotating seat; 26. fixed bag; 27. linkage rod; 28. cloth belt ring; 29. ​​second crease; 30. extension section; 31. hanging buckle; 32. code piece; 33. first magnetic strip; 34. second magnetic strip; 35. curling; 36. counterweight rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0018] Example: like Figures 1 to 11As shown, an embodiment of the present invention provides a foldable dust cover for a forward-flipping spreader, comprising a container 1, a spreader body 2, a dust bag 3, a plurality of first entrainment belts 19, a plurality of second entrainment belts 22, a first rotating shaft 4, a connecting rod 5, a gear box 6, a second rotating shaft 7, a fourth rotating shaft 14, a third rotating shaft 8, a first swing rod 9, a second swing rod 10, a first gear 12, a second gear 13, a first folding rod 20, a second folding rod 21, a first incomplete gear 15, a second incomplete gear 16, a complete gear 17 and a counterweight sliding sleeve 1 .... The rod 21, the first incomplete gear 15, the second incomplete gear 16, and the complete gear 17 form two sets of folding and unfolding mechanisms for opening or folding the dust bag 3 when the sling body 2 is turned over. The left and right side walls of the dust bag 3 are both provided with a Y-shaped first fold 23. The dust bag 3 is a waterproof and wear-resistant synthetic fabric. The transverse cross-section of the dust bag 3 is rectangular and the rectangular opening size is consistent with the size of the discharge port of the sling body 2. The waterproof and wear-resistant synthetic fabric has good waterproof and wear-resistant effects and a long service life. The Y-shaped first fold 23 is provided on the left and right side walls of the dust bag 3 to facilitate unfolding and folding along the first fold 23. In order to facilitate the opening of the dust bag 3, a set of gear boxes 6 are fixedly connected to the front wall of the container 1 and located on the left and right sides. The inner side walls of the two groups of gear boxes 6 are rotatably connected with the second rotating shaft 7, the fourth rotating shaft 14 and the third rotating shaft 8 in sequence from top to bottom. The opposite ends of the two groups of second rotating shafts 7 and the opposite ends of the two groups of third rotating shafts 8 respectively penetrate the opposite sides of the two groups of gear boxes 6 and extend toward the outside of the two groups of gear boxes 6 respectively. The ends of the two groups of second rotating shafts 7 extending to the outside of the gear box 6 are fixedly connected with the first swing rod 9, and the ends of the two groups of third rotating shafts 8 extending to the outside of the gear box 6 are fixedly connected with the second swing rod 10. A transmission structure for meshing transmission of the second rotating shaft 7, the fourth rotating shaft 14 and the third rotating shaft 8 is provided inside the gear box 6. A first gear rod 12 is rotatably connected between the ends of the two groups of first swing rods 9 away from the second rotating shaft 7, and the two groups of second swing rods 10 are away from the third gear box 6. A second stopper 13 is rotatably connected between one end of the rotating shaft 8, and the end of the dust bag 3 away from the sling body 2 passes through the first stopper 12 and the second stopper 13. The transmission structure includes a first incomplete gear 15, a second incomplete gear 16 and a complete gear 17. The first incomplete gear 15, the second incomplete gear 16 and the complete gear 17 are respectively fixedly connected to the outer wall of the second rotating shaft 7, the outer wall of the fourth rotating shaft 14 and the outer wall of the third rotating shaft 8 and are all located inside the gear box 6. The teeth of the outer wall of the second incomplete gear 16 are meshed with the complete gear 17. The outer wall of the circumference of the second incomplete gear 16 is provided with a locking arc groove 18, and the arc diameter of the locking arc groove 18 is slidably connected with the non-tooth part of the outer wall of the circumference of the first incomplete gear 15.The second incomplete gear 16 is slidably connected with the non-toothed part of the circumferential outer wall of the first incomplete gear 15 through the locking arc groove 18 to lock the position. When the discharge port of the sling body 2 is flipped forward by 20 degrees from perpendicular to the horizontal plane, the second incomplete gear 16 is released from the locked state and the teeth of the outer wall of the second incomplete gear 16 are meshed with the teeth of the first incomplete gear 15. When the sling body 2 is flipped to the discharge port being perpendicular to the horizontal plane, the first swing arm 9 and the second swing arm 10 are both vertical to the bottom of the sling body 2. At this time, the bag body 3 is folded. When the sling body 2 continues to move forward, the bag body 3 is folded. When the sling body 2 is flipped forward by 20 degrees, the first incomplete gear 15 releases the lock on the second incomplete gear 16, and at this time, the outer wall teeth of the first incomplete gear 15 begin to mesh with the outer wall teeth of the second incomplete gear 16, and the front wall of the dust bag 3 is partially unfolded by the counterweight structure driving the first swing rod 9 and the first stop rod 12 to move. When the sling body 2 is flipped forward, the counterweight structure drives the first swing rod 9 and the first stop rod 12 to continue to unfold the front wall of the dust bag, and at the same time, the first incomplete gear 15, the second incomplete gear 16 and the complete gear 1 7 are meshed, driving the second swing rod 10 and the second stop rod 13 to rotate in the same direction as the first swing rod 9 and the first stop rod 12, until the discharge port of the sling body 2 is flipped to be parallel to the horizontal plane. At this time, the first swing rod 9 and the second swing rod 10 respectively drive the first stop rod 12 and the second stop rod 13 to completely open the front and rear side walls of the dust bag. The left and right ends of the first stop rod 12 and the left and right ends of the second stop rod 13 are rotatably connected to the rotating sleeve 24, and the outer walls of the four groups of three rotating sleeves 24 are rotatably connected to the rotating seat 25. The left and right ends of the first stop rod 12 are connected to the rotating seat 25 through the two groups of rotating sleeves. The seats 25 are respectively rotatably connected with a group of first folding rods 20, and the left and right ends of the second barrier rod 13 are respectively rotatably connected with a group of second folding rods 21 through two groups of rotating seats 25. The ends of the two groups of first folding rods 20 away from the first barrier rod 12 are respectively rotatably connected with the ends of the two groups of second folding rods 21 away from the second barrier rod 13. When the first swing rod 9 and the second swing rod 10 drive the first barrier rod 12 and the second barrier rod 13 to be unfolded and folded, the two groups of first folding rods 20 and the second folding rods 21 are synchronously used to drive the left and right side walls of the dust bag 3 to be unfolded and folded; like Figure 1 , Figure 2 , Figure 5 as well as Figure 6 As shown, in order to drive the first swing rod 9 to rotate through the flipping action of the sling body 2, the counterweight sliding sleeve 11 is slidably connected to the outer walls of the two groups of first swing rods 9 and is rotationally connected to the first rotating shaft 4 through the connecting rod 5. When the discharge port of the sling body 2 flips from perpendicular to the horizontal plane to parallel to the horizontal plane, the connecting rod 5 always maintains the axial vertical horizontal plane through the gravity control of the counterweight sliding sleeve 11, and then through the sliding connection between the counterweight sliding sleeve 11 and the first swing rod 9 and the rotational connection relationship between the counterweight sliding sleeve 11 and the connecting rod 5, the first swing rod 9 is driven to rotate along the axis of the second rotating shaft 7 through the counterweight sliding sleeve 11 when the sling body 2 flips; like Figure 1 , Figure 3 As shown, in order to maintain the active connection between the first baffle rod 12, the second baffle rod 13, the first folding rod 20, the second folding rod 21 and the outer wall of the dust bag 3, the first baffle rod 12 and the second baffle rod 13 drive the front wall and the rear wall of the dust bag 3 to open and fold through multiple sets of first clamping belts 19, and the first folding rod 20 and the second folding rod 21 drive the left and right side walls of the dust bag 3 to open and fold through multiple sets of second clamping belts 22. The side of the dust bag 3 connected to the upper wall of the sling body 2 and the dust bag 3 connected to the sling body 2 are connected. Two sets of first clamping bands 19 are provided on the side connected to the lower wall of the body 2, and two sets of second clamping bands 22 are provided on the side connected to the left wall of the sling body 2 and the side connected to the right wall of the sling body 2. The first clamping band 19 and the second clamping band 22 are both sewn and fixed to the outer wall of the dust bag 3 at both ends, and the first stop bar 12, the second stop bar 13, the first folding bar 20 and the second folding bar 21 pass through the middle area of ​​the sewn fixed positions at both ends to form a movable connection; like Figure 1 , Figure 5 , Figure 8 , Fig. 9 as well as Fig.10 As shown, in order to adjust the dustproof height of the dustproof cloth bag 3, an extension section 30 is hung on the outer wall of one end of the dustproof cloth bag 3 away from the sling body 2 through a hook structure. The extension section 30 is a waterproof and wear-resistant synthetic cloth. The hook structure includes multiple groups of hooks 31 and code pieces 32. The multiple groups of hooks 31 are arranged in a ring shape on the outer wall of the dustproof cloth bag 3 and are all close to the lower end of the dustproof cloth bag 3. The multiple groups of code pieces 32 are all fixedly connected to the inner side wall of the extension section 30 and are respectively opposite to the inner and outer sides of the multiple groups of hooks 31. The extension section 30 is fixed by the multiple groups of code pieces 32 and the hooks 31. The extension section 30 can be clamped to the outer wall of the lower end of the dustproof cloth bag 3 through the clamping of the multiple groups of code pieces 32 and the hooks 31. like Figure 5 As shown, both left and right side walls of the extension section 30 are provided with vertical second folds 29, and the upper ends of the two second folds 29 are respectively aligned with the lower ends of the two first folds 23 in a Y shape. By providing the second folds 29, the extension section 30 can be opened and folded conveniently when the dust bag 3 is opened and folded; like Figure 7As shown, in order to prevent dust from leaking at the connection between the extension section 30 and the dust bag 3, a magnetic attraction structure for adsorption and fixation to maintain the dustproof effect is provided between the inner wall of the extension section 30 and the outer wall of the dust bag 3, and the magnetic attraction structure includes a first magnetic strip 33 and a second magnetic strip 34, which are respectively arranged on the opposite sides of the dust bag 3 and the extension section 30 and are both located below the hook structure, the first magnetic strip 33 and the second magnetic strip 34 have the same horizontal height and opposite magnetic properties on the opposite sides, the first magnetic strip 33 and the second magnetic strip 34 are both multi-segment splicing structures, and the first magnetic strip 33 and the second magnetic strip 34 are both formed by splicing multiple sections of soft magnetic strips, and after the extension section 30 is installed, the connection is kept sealed by the mutual adsorption of the first magnetic strip 33 and the second magnetic strip 34; like Figure 1 , Figure 5 As shown, in order to cooperate with the opening and folding actions of the dust bag 3, a linkage structure is provided between the outer wall of the extension section 30 and the outer wall of the dust bag 3 for driving the extension section 30 to open synchronously when the folding and unfolding structure drives the dust bag 3 to open. The linkage structure includes a fixed bag 26, a cloth belt ring 28 and a linkage rod 27. The fixed bag 26 is fixedly connected to the outer wall of the extension section 30, the cloth belt ring 28 is fixedly connected to the outer wall of the dust bag 3 and is opposite to the fixed bag 26 up and down, and the linkage rod 27 is fixedly connected to the inner wall of the fixed bag 26. The upper end of the linkage rod 27 passes through the upper wall of the fixed bag 26 and extends toward the top of the fixed bag 26. The end of the linkage rod 27 extending to the top of the fixed bag 26 passes between the cloth belt ring 28 and the dust bag 3. The dust bag 3 is connected to the extension section 30 through the linkage rod 27, so that the extension section 30 keeps synchronous action when the folding and unfolding mechanism drives the dust bag 3 to fold or unfold. like Fig.11 As shown, in order to prevent the extension section 30 from floating up due to wind and leaking dust, the lower opening of the extension section 30 is provided with an inwardly rolled edge 35, and the inner wall of the rolled edge 35 is provided with a counterweight structure for keeping the extension section 30 drooping. The counterweight structure includes multiple groups of counterweight rods 36, and the multiple groups of counterweight rods 36 are arranged in sequence on the inner wall of the rolled edge 35 with the ends abutting against each other. The multiple groups of counterweight rods 36 can maintain the drooping direction of the lower opening of the extension section 30.

[0019] Working principle: when the sling body 2 is flipped to the point where the discharge port is perpendicular to the horizontal plane, the first swing arm 9 and the second swing arm 10 are both vertically directed below the sling body 2. At this time, the bag body 3 is in a folded state. When the sling body 2 continues to flip forward by twenty degrees, the first incomplete gear 15 releases the lock on the second incomplete gear 16, and at this time, the outer wall teeth of the first incomplete gear 15 begin to mesh with the outer wall teeth of the second incomplete gear 16. The front wall of the dust-proof cloth bag 3 is partially unfolded by the movement of the first swing arm 9 and the first baffle 12 driven by the counterweight structure. When the sling body 2 continues to flip forward to the point where the discharge port is perpendicular to the horizontal plane, the counterweight structure drives the first swing arm 9 and the first baffle 12 to continue to unfold the front wall of the dust-proof cloth bag. At the same time, through the meshing between the first incomplete gear 15, the second incomplete gear 16 and the complete gear 17, the second swing arm 10 and the second baffle 13 are driven to rotate in the same direction as the first swing arm 9 and the first baffle 12 until the discharge port of the sling body 2 is flipped to be parallel to the horizontal plane. At this time, the first swing arm The rod 9 and the second swing rod 10 respectively drive the first stop rod 12 and the second stop rod 13 to fully open the front and rear side walls of the dust bag. The extension section 30 is fixed by multiple sets of code pieces 32 and the hooks 31. The extension section 30 can be clamped to the outer wall of the lower end of the dust bag 3 through the clamping of multiple sets of code pieces 32 and the hooks 31. The left and right side walls of the extension section 30 are both provided with vertical second folds 29. The upper ends of the two second folds 29 are respectively aligned with the lower ends of the two first folds 23 in a Y shape. The second fold 29 is arranged to facilitate the extension section 30 to be opened and folded when the dust bag 3 is opened and folded. After the extension section 30 is installed, the connection is sealed by the mutual adsorption of the first magnetic strip 33 and the second magnetic strip 34. The dust bag 3 and the extension section 30 are connected by the linkage rod 27, so that the folding and unfolding mechanism drives the extension section 30 to maintain synchronous movement when the dust bag 3 is folded or unfolded, and the multiple sets of counterweight rods 36 can maintain the drooping direction of the lower end of the extension section 30.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foldable dust cover for a forward-turning sling, characterized in that: The invention comprises a container (1), a sling body (2), a dust bag (3), a plurality of first clamping straps (19), a plurality of second clamping straps (22), a first rotating shaft (4), a connecting rod (5), a gear box (6), a second rotating shaft (7), a fourth rotating shaft (14), a third rotating shaft (8), a first swing arm (9), a second swing arm (10), a first gear lever (12), a second gear lever (13), a first folding rod (20), a second folding rod (21), a first incomplete gear (15), a second incomplete gear (16), a complete The gear (17) and the counterweight sliding sleeve (11), the gear box (6), the second rotating shaft (7), the fourth rotating shaft (14), the third rotating shaft (8), the first swing arm (9), the second swing arm (10), the first gear lever (12), the second gear lever (13), the first folding rod (20), the second folding rod (21), the first incomplete gear (15), the second incomplete gear (16), and the complete gear (17) form two sets of folding and unfolding mechanisms for opening or folding the dust bag (3) when the sling body (2) is turned over.

2. The foldable dust cover of the forward flip sling according to claim 1, characterized in that: The counterweight sliding sleeve (11) is slidably connected to the outer walls of the two groups of first swing arms (9) and is rotationally connected to the first rotating shaft (4) through a connecting rod (5); the first blocking rod (12) and the second blocking rod (13) drive the front wall and the rear wall of the dustproof cloth bag (3) to open and fold through multiple groups of first clamping belts (19); the first folding rod (20) and the second folding rod (21) drive the left and right side walls of the dustproof cloth bag (3) to open and fold through multiple groups of second clamping belts (22); and an extension section (30) is suspended on the outer wall of one end of the dustproof cloth bag (3) away from the sling body (2) through a hook structure.

3. The foldable dust cover of the forward flip sling according to claim 2, characterized in that: A magnetic attraction structure for adsorption and fixation to maintain a dustproof effect is provided between the inner wall of the extension section (30) and the outer wall of the dustproof cloth bag (3); a linkage structure for driving the extension section (30) to open synchronously when the folding and unfolding structure drives the dustproof cloth bag (3) to open; a curling edge (35) rolled inwardly is provided at the lower mouth of the extension section (30); and a counterweight structure for keeping the extension section (30) drooping is provided on the inner wall of the curling edge (35).

4. The foldable dust cover of the forward flip sling according to claim 3, characterized in that: The dustproof cloth bag (3) and the extension section (30) are both made of waterproof and wear-resistant synthetic cloth.

5. The foldable dust cover of the forward flip sling according to claim 4, characterized in that: The left and right side walls of the dust bag (3) are both provided with a first Y-shaped fold (23), and the left and right side walls of the extension section (30) are both provided with a second vertical fold (29), and the upper ends of the two second folds (29) are respectively aligned with the Y-shaped lower ends of the two first folds (23).

6. The foldable dust cover of the forward flip sling according to claim 5, characterized in that: The hook structure comprises a plurality of sets of hooks (31) and code pieces (32); the plurality of sets of hooks (31) are arranged in a ring shape on the outer wall of the dustproof cloth bag (3) and are close to the lower end of the dustproof cloth bag (3); the plurality of sets of code pieces (32) are fixedly connected to the inner wall of the extension section (30) and are respectively opposite to the inner and outer sides of the plurality of sets of hooks (31); the extension section (30) is fixedly connected to the hooks (31) by the plurality of sets of code pieces (32).

7. The foldable dust cover of the forward flip sling according to claim 6, characterized in that: The magnetic attraction structure comprises a first magnetic strip (33) and a second magnetic strip (34); the first magnetic strip (33) and the second magnetic strip (34) are respectively arranged on opposite sides of the dustproof cloth bag (3) and the extension section (30) and are both located below the hook structure; the first magnetic strip (33) and the second magnetic strip (34) have the same horizontal height and opposite magnetic properties on opposite sides; and the first magnetic strip (33) and the second magnetic strip (34) are both multi-section splicing structures.

8. The foldable dust cover of the forward flip sling according to claim 7, characterized in that: The first magnetic strip (33) and the second magnetic strip (34) are both formed by splicing together multiple sections of soft magnetic strips.

9. The foldable dust cover of the forward flip sling according to claim 8, characterized in that: The linkage structure comprises a fixed bag (26), a cloth belt ring (28) and a linkage rod (27); the fixed bag (26) is fixedly connected to the outer wall of the extension section (30); the cloth belt ring (28) is fixedly connected to the outer wall of the dustproof cloth bag (3) and is opposite to the fixed bag (26) in upper and lower directions; the linkage rod (27) is fixedly connected to the inner wall of the fixed bag (26); the upper end of the linkage rod (27) passes through the upper wall of the fixed bag (26) and extends toward the top of the fixed bag (26); the end of the linkage rod (27) extending above the fixed bag (26) passes between the cloth belt ring (28) and the dustproof cloth bag (3).

10. The foldable dust cover of the forward flip sling according to claim 9, characterized in that: The counterweight structure comprises a plurality of groups of counterweight rods (36), wherein the plurality of groups of counterweight rods (36) are sequentially arranged on the inner side wall of the curling edge (35) with their ends abutting against each other.

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