Mechanical Claw for Handling Tonne Bags

Abstract

The present invention discloses a mechanical claw for handling ton bags, which relates to the technical field of ton bag mechanical claws and includes a mechanical claw body and two groups of robotic arms. Connecting frames are fixed at the ends of the two groups of robotic arms. A middle lifting hook is movably connected to the middle position at the bottom of the connecting frame. Expansion lifting hooks are slidably connected to the inner sides of the two support frames. During the downward movement of the middle lifting hook in the present invention, two groups of expansion connecting rods are driven to horizontally push out the expansion lifting hooks on both sides thereof, thereby increasing the distance between the two groups of expansion lifting hooks, thus avoiding the problem of relatively concentrated force on the lifting rings in the prior art and the problem of damage to the lifting rings. Under the action of hydraulic oil, the gear drives the flipping and pressing plate through the transmission shaft to further press and fix the lifting rings inside the expansion lifting hooks. As can be seen from the above, the whole of the present invention can not only disperse the force points when the lifting hooks lift the ton bags, avoid damage to the ton bag lifting rings, but also further clamp and fix the lifting rings.

Description

Technical Field

[0001] The present invention relates to the technical field of ton bag mechanical claws, and specifically relates to a mechanical claw for handling ton bags. Background Art

[0002] The international standard ton bag pattern (also known as a bulk bag / space bag / flexible container / ton bag / ton bag / space bag / mother and son bag) is a flexible transport packaging container with the advantages of moisture-proof, dust-proof, radiation-resistant, firm and safe, and has sufficient strength in structure. Since bulk bags are very convenient for loading, unloading and handling, the loading and unloading efficiency has been significantly improved, and they have developed rapidly in recent years. Bulk bags are generally woven from polyester fibers such as polypropylene and polyethylene.

[0003] As a logistics helper, the ton bag plays the role of saving time, labor and money. Among them, for the ton bag with two groups of lifting rings during operation, the ton bag lifting rings are often hung on the hooks of the mechanical claws of external lifting equipment, and then the lifted ton bag is transported and loaded and unloaded by the external lifting equipment.

[0004] In the prior art, when the mechanical claw hook hoists the ton bag lifting ring, the contact surface between the hook and the lifting ring is relatively concentrated, and the stress point of the lifting ring is small, resulting in an increased risk of damage to the lifting ring when handling and hoisting the ton bag. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a mechanical claw for handling ton bags to solve the technical problem that the contact surface between the hook and the lifting ring in the prior art is relatively concentrated, and the stress point of the lifting ring is small, resulting in an increased risk of damage to the lifting ring when handling and hoisting the ton bag.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A mechanical claw for handling ton bags, including a mechanical claw body and two groups of robotic arms, wherein the mechanical claw body and the two groups of robotic arms are rotatably connected through a rotating shaft, and a transmission mechanism is arranged inside the mechanical claw body. A connecting ring is fixedly arranged at the middle position on the top of the mechanical claw body, and an anti-slip ring is fixedly arranged on the inner wall of the connecting ring. Connecting frames are fixed at the ends of the two groups of robotic arms, and support frames are fixed on both sides of the bottoms of the two groups of connecting frames;

[0007] A middle hook is movably connected to the middle position at the bottom of the connecting frame. Two expansion hooks are slidably connected to the inner sides of the two support frames. The horizontal height of the middle hook is higher than that of the two expansion hooks. The two sides of the middle hook and the two expansion hooks are movably connected by two expansion connecting rods. Sliding frames are fixed to the outer sides of the two expansion hooks. A piston mechanism is fixedly arranged at one end of the two support frames, and the piston mechanism is fixedly connected to the sliding frames. The piston mechanism includes a piston rod, a piston cylinder, a first piston, and an oil injection pipe. The piston rod is fixedly connected to the sliding frame. The first piston is located inside the piston cylinder and is fixedly connected to the piston rod on one side thereof;

[0008] Hydraulic cylinders are fixedly arranged at one end of the two expansion hooks. The hydraulic cylinders are connected to the piston mechanism through connecting pipes. A second piston is arranged at the top end inside the hydraulic cylinder. One end of the bottom of the second piston is fixedly connected to a toothed plate. A gear meshing with the toothed plate is rotatably connected inside the hydraulic cylinder, and the gear is rotatably connected to the hydraulic cylinder through a transmission shaft. Flipping pressing plates located inside the expansion hooks are fixedly arranged on both sides of the transmission shaft.

[0009] By adopting the above technical solution, the two lifting rings of the ton bag are lifted by the two hook mechanisms, so that the lifting rings of the ton bag are hung inside the middle hook and the two expansion hooks. As the external lifting equipment continues to rise, when the lifting rings of the ton bag start to be stressed, the lifting rings first press down the middle hook under the action of gravity. During the descending process of the middle hook, the two expansion connecting rods are driven to horizontally push out the expansion hooks on both sides thereof, thereby increasing the distance between the two expansion hooks, so that the two expansion hooks and the middle hook as a whole lift the lifting rings, thus avoiding the problem that the lifting rings in the prior art are more concentrated in force and the problem that the lifting rings are damaged. At the same time, when the two expansion hooks move horizontally, the piston rod and the first piston are driven by the two sliding frames to compress the hydraulic oil inside the piston cylinder, and the hydraulic oil is compressed into the inside of the hydraulic cylinder through the connecting pipe. At this time, under the action of the hydraulic oil, the second piston drives the toothed plate to engage and rotate the gear, and the gear drives the flipping pressing plate to close relative to the expansion hook through the transmission shaft, so that the flipping pressing plate further presses and fixes the lifting ring inside the expansion hook. As can be seen from the above, the whole of the present invention can not only disperse the stress points when the hook lifts the ton bag, avoid damage to the lifting rings of the ton bag, but also further clamp and fix the lifting rings, thereby ensuring that the ton bag is more stable during the whole lifting process and avoiding problems such as shaking and even damage.

[0010] The present invention is further arranged such that oil injection pipes are arranged on one side of the tops of the two piston cylinders, and a sealing plug is fixedly arranged inside the oil injection pipes.

[0011] By adopting the above technical solution, the hydraulic oil can be injected into and replaced in the piston cylinder through the oil injection pipe.

[0012] The present invention is further configured such that support sliding rods penetrating through the two sets of extended hooks are fixedly arranged on the inner sides of the two sets of support frames. The support sliding rods play an auxiliary moving support role for the extended hooks. A first spring is fixedly arranged between the two sets of extended hooks and the two sets of support frames and on the outer sides of the support sliding rods. A second spring fixedly connected to the inner side of the connecting frame is fixedly arranged at the top of the middle hook, and the second spring is fixedly connected to the middle hook through screws. First sliding holes slidably connected to the support frames are formed at both ends inside the two sets of extended hooks, and second sliding holes cooperating with the support sliding rods are formed at the middle positions inside the two sets of extended hooks.

[0013] By adopting the above technical solution, since the gravity of the ton bag on the middle hook disappears at this time, the middle hook rises under the reset action of the second spring, and the two first springs also respectively push the two sets of extended hooks to reset, making them approach the middle hook. At the same time, the first piston draws the hydraulic oil back into the piston cylinder, so that the flipping pressing plate releases the limiting and fixing effect on the hanging ring, and the overall operation is relatively convenient.

[0014] The present invention is further configured such that fixing frames cooperating with the piston cylinders are fixedly arranged at one ends of the two sets of support frames, and sliding grooves cooperating with the sliding frames are formed inside the fixing frames.

[0015] By adopting the above technical solution, the fixing frames play a role of fixedly supporting the piston cylinders.

[0016] In summary, the present invention mainly has the following beneficial effects: The present invention lifts the two lifting rings of the ton bag through two sets of hook mechanisms, so that the lifting rings of the ton bag are hung inside the middle hook and the two sets of extended hooks. As the external lifting equipment continues to rise, when the lifting rings of the ton bag start to bear force, the lifting rings first press down on the middle hook under the action of gravity. During the descent of the middle hook, it drives the two sets of extended connecting rods to horizontally push out the extended hooks on both sides, thereby increasing the distance between the two sets of extended hooks, so that the two sets of extended hooks and the middle hook as a whole lift the lifting rings, thus avoiding the problem of concentrated force on the lifting rings in the prior art and the problem of damage to the lifting rings. At the same time, when the two sets of extended hooks move horizontally, they drive the piston rod and the first piston through the two sets of sliding frames to compress the hydraulic oil inside the piston cylinder, and compress the hydraulic oil into the inside of the hydraulic cylinder through the connecting pipe. At this time, under the action of the hydraulic oil, the second piston drives the toothed plate to engage and rotate the gear, and the gear drives the flipping pressing plate to close relative to the extended hook through the transmission shaft, so that the flipping pressing plate further presses and fixes the lifting ring inside the extended hook. As can be seen from the above, the whole of the present invention can not only disperse the stress points when the hook lifts the ton bag, avoid damage to the lifting rings of the ton bag, but also further clamp and fix the lifting rings, thereby ensuring that the ton bag is more stable during the overall lifting process and avoiding problems such as shaking and even damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0018] Figure 2 is a schematic internal structural diagram of the first perspective of the present invention;

[0019] Figure 3 is a schematic internal structural diagram of the second perspective of the present invention;

[0020] Figure 4 is an exploded view of the internal structure of the present invention;

[0021] Figure 5 For the present invention Figure 4 is an enlarged view of part A;

[0022] Figure 6 For the present invention Figure 4 is an enlarged view of part B;

[0023] Figure 7 is a schematic structural diagram of the extended hook of the present invention.

[0024] In the figure: 1. Mechanical claw body; 2. Robotic arm; 3. Connecting frame; 4. Support frame; 5. Extended hook; 6. Intermediate hook; 7. Extended connecting rod; 8. Sliding frame; 9. Piston rod; 10. Piston cylinder; 11. First piston; 12. Hydraulic cylinder; 13. Connecting pipe; 14. Second piston; 15. Toothed plate; 16. Gear; 17. Transmission shaft; 18. Flipping and pressing plate; 19. Support slide bar; 20. First spring; 21. Second spring; 22. Fixed frame; 23. Oil injection pipe; 24. First sliding hole; 25. Second sliding hole; 26. Rotating shaft; 27. Connecting ring. Detailed implementation manners

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0026] The embodiments of the present invention will be described below according to its overall structure.

[0027] A mechanical claw for handling ton bags, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown, includes a mechanical claw body 1 and two groups of robotic arms 2. The mechanical claw body 1 and the two groups of robotic arms 2 are rotatably connected through a rotating shaft 26. A transmission mechanism is arranged inside the mechanical claw body 1. A connecting ring 27 is fixedly arranged at the middle position on the top of the mechanical claw body 1, and an anti-slip ring is fixedly arranged on the inner wall of the connecting ring 27. Connecting frames 3 are fixed at the ends of the two groups of robotic arms 2, and support frames 4 are fixed on both sides of the bottoms of the two groups of connecting frames 3;

[0028] An intermediate hook 6 is movably connected to the middle position at the bottom of the connecting frame 3. Extended hooks 5 are slidably connected to the inner sides of the two groups of support frames 4. The horizontal height of the intermediate hook 6 is higher than the horizontal height of the two groups of extended hooks 5. The two sides of the intermediate hook 6 and the two groups of extended hooks 5 are movably connected through two groups of extended connecting rods 7. Sliding frames 8 are fixed on the outer sides of the two groups of extended hooks 5. A piston mechanism is fixedly arranged at one end of the two groups of support frames 4, and the piston mechanism is fixedly connected to the sliding frame 8. The piston mechanism includes a piston rod 9, a piston cylinder 10, a first piston 11 and an oil injection pipe 23. The piston rod 9 is fixedly connected to the sliding frame 8. The first piston 11 is located inside the piston cylinder 10 and is fixedly connected to the piston rod 9 at one side thereof;

[0029] Both ends of the two groups of extended hooks 5 are fixedly provided with hydraulic cylinders 12. The hydraulic cylinders 12 and the piston mechanism are connected by a connecting pipe 13. At the top end inside the hydraulic cylinder 12, a second piston 14 is provided. One end of the bottom of the second piston 14 is fixedly provided with a toothed plate 15. Inside the hydraulic cylinder 12, a gear 16 meshing with the toothed plate 15 is rotatably connected, and the gear 16 is rotatably connected to the hydraulic cylinder 12 through a transmission shaft 17. On both sides of the transmission shaft 17, turning and pressing plates 18 located inside the extended hook 5 are fixedly provided. At this time, as the external hoisting equipment continues to rise, when the lifting ring of the ton bag starts to be stressed, the lifting ring first presses down the middle hook 6 under the action of gravity. During the descent of the middle hook 6, the two groups of extended connecting rods 7 are driven to horizontally push out the extended hooks 5 on both sides, thereby increasing the distance between the two groups of extended hooks 5, so that the two groups of extended hooks 5 and the middle hook 6 as a whole hoist the lifting ring, thus avoiding the problem of relatively concentrated stress on the lifting ring in the prior art and avoiding the problem of damage to the lifting ring;

[0030] Meanwhile, when the two groups of extended hooks 5 move horizontally, the piston rod 9 and the first piston 11 are driven by the two groups of sliding frames 8 to compress the hydraulic oil inside the piston cylinder 10, and the hydraulic oil is compressed into the inside of the hydraulic cylinder 12 through the connecting pipe 13. At this time, under the action of the hydraulic oil, the second piston 14 drives the toothed plate 15 to engage and rotate the gear 16, and the gear 16 drives the turning and pressing plate 18 to close relative to the extended hook 5 through the transmission shaft 17, so that the turning and pressing plate 18 further presses and fixes the lifting ring inside the extended hook 5.

[0031] Please refer to Figure 2 、 Figure 3 and Figure 5 . On one side of the top of the two piston cylinders 10, oil injection pipes 23 are provided, and a sealing plug is fixedly provided inside the oil injection pipes 23. By setting the above structure in the present invention, hydraulic oil can be injected into and replaced in the piston cylinder 10 through the oil injection pipes 23.

[0032] Please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 7, on the inner sides of both groups of support frames 4, there are support sliding rods 19 fixedly arranged through both groups of extended lifting hooks 5. Among them, the support sliding rods 19 play an auxiliary moving support role for the extended lifting hooks 5. Between the two groups of extended lifting hooks 5 and the two groups of support frames 4 and on the outer side of the support sliding rods 19, there are first springs 20 fixedly arranged. At the top of the middle lifting hook 6, there is a second spring 21 fixedly connected to the inner side of the connecting frame 3. And the second spring 21 and the middle lifting hook 6 are fixedly connected by screws. At both ends inside the two groups of extended lifting hooks 5, there are first sliding holes 24 slidably connected to the support frames 4. At the middle position inside the two groups of extended lifting hooks 5, there are second sliding holes 25 matched with the support sliding rods 19. By setting the above structure in the present invention, since the gravity of the ton bag received by the middle lifting hook 6 disappears at this time, the middle lifting hook 6 rises under the reset action of the second spring 21. And the two first springs 20 also respectively push the two groups of extended lifting hooks 5 to reset, making them close to the middle lifting hook 6. At the same time, the first piston 11 pumps the hydraulic oil back into the piston cylinder, so that the flipping pressing plate 18 opens the limiting and fixing effect on the lifting ring. The overall operation is relatively convenient.

[0033] Please refer to Figure 4 , at one end of the two groups of support frames 4, there is a fixing frame 22 matched with the piston cylinder 10 fixedly arranged. And inside the fixing frame 22, there is a sliding groove matched with the sliding frame 8. By setting the above structure in the present invention, the fixing frame 22 plays a role of fixing and supporting the piston cylinder 10.

[0034] The working principle of the present invention is as follows: When in use, it is fixedly connected to the connecting ring 27 of the present invention through an external lifting device, and is fixedly connected to one of the rotating shafts 26 through an external driving device. Inside the mechanical claw body 1, there is a transmission mechanism. The transmission mechanism includes two meshing transmission gears. Through the two transmission gears, the two mechanical arms 2 can perform relative movement.

[0035] Specifically, the two mechanical arms 2 drive the two hook mechanisms to descend to both sides of the ton bag. As the hook mechanisms gradually move upward and synchronously deflect, the two hook mechanisms capture the two lifting rings of the ton bag, and then the two lifting rings of the ton bag are hung into the inside of the two hook mechanisms.

[0036] At this time, as the external lifting device continues to rise, when the lifting ring of the ton bag starts to be stressed, the lifting ring first presses down the middle lifting hook 6 under the action of gravity. During the descending process of the middle lifting hook 6, it drives the two groups of extended connecting rods 7 to horizontally push out the extended lifting hooks 5 on both sides, thereby increasing the distance between the two groups of extended lifting hooks 5. The two groups of extended lifting hooks 5 and the middle lifting hook 6 as a whole lift the lifting ring, thus avoiding the problem of relatively concentrated stress on the lifting ring in the prior art and the problem of damage to the lifting ring.

[0037] Meanwhile, when the two groups of extended hooks 5 move horizontally, the piston rod 9 and the first piston 11 are driven by the two groups of sliding frames 8 to compress the hydraulic oil inside the piston cylinder 10, and the hydraulic oil is compressed into the inside of the hydraulic cylinder 12 through the connecting pipe 13. At this time, under the action of the hydraulic oil, the second piston 14 drives the toothed plate 15 to engage with the gear 16 to rotate. The gear 16 drives the flipping and pressing plate 18 to close relative to the extended hook 5 through the transmission shaft 17, so that the flipping and pressing plate 18 further presses and fixes the sling ring inside the extended hook 5;

[0038] As can be seen from the above, the whole of the present invention can not only disperse the stress points when the hook hoists the ton bag, avoid damage to the sling ring of the ton bag, but also further clamp and fix the sling ring, thus ensuring that the ton bag is more stable during the whole hoisting process and avoiding problems such as shaking or even damage;

[0039] Furthermore, when the ton bag is lowered, since the gravity of the ton bag on the middle hook 6 disappears at this time, the middle hook 6 rises under the reset action of the second spring 21, and the two groups of first springs 20 also respectively push the two groups of extended hooks 5 to reset, making them close to the middle hook 6. At the same time, the first piston 11 draws the hydraulic oil back into the piston cylinder, so that the flipping and pressing plate 18 opens the limiting and fixing effect on the sling ring, and the overall operation is relatively convenient;

[0040] Furthermore, the two groups of support frames 4 and the two groups of support sliding rods 19 play a role in actively supporting the two groups of extended hooks 5, so that after the two groups of extended hooks 5 are extended, they can stably hoist the sling ring of the ton bag, and the overall force is more stable, avoiding the phenomenon of unstable force;

[0041] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A mechanical claw for handling ton bags, comprising a mechanical claw body (1) and two groups of robotic arms (2), characterized in that: At the ends of the two sets of robotic arms (2), connecting frames (3) are fixed, and at both sides of the bottom of the two sets of connecting frames (3), support frames (4) are fixed; At the middle position of the bottom of the connecting frame (3), an intermediate hook (6) is movably connected. Inside the two sets of support frames (4), extension hooks (5) are slidably connected. The horizontal height of the intermediate hook (6) is higher than that of the two extension hooks (5). The two sides of the intermediate hook (6) and the two extension hooks (5) are movably connected by two sets of extension connecting rods (7). At the outer sides of the two sets of extension hooks (5), sliding frames (8) are fixed. At one end of the two sets of support frames (4), a piston mechanism is fixedly arranged, and the piston mechanism is fixedly connected to the sliding frame (8); At one end of each of the two sets of extension hooks (5), a hydraulic cylinder (12) is fixedly arranged. The hydraulic cylinder (12) is connected to the piston mechanism through a connecting pipe (13). At the top end inside the hydraulic cylinder (12), a second piston (14) is arranged. At one end of the bottom of the second piston (14), a toothed plate (15) is fixed. Inside the hydraulic cylinder (12), a gear (16) meshing with the toothed plate (15) is rotatably connected, and the gear (16) is rotatably connected to the hydraulic cylinder (12) through a transmission shaft (17). On both sides of the transmission shaft (17), turning and pressing plates (18) located inside the extension hook (5) are fixedly arranged.

2. The mechanical claw for handling ton bags according to claim 1, characterized in that: The piston mechanism includes a piston rod (9), a piston cylinder (10), a first piston (11), and an oil injection pipe (23). The piston rod (9) is fixedly connected to the sliding frame (8), and the first piston (11) is located inside the piston cylinder (10) and is fixedly connected to the piston rod (9) on one side.

3. The mechanical claw for handling ton bags according to claim 2, wherein: On one side of the top of the two sets of piston cylinders (10), oil injection pipes (23) are arranged, and a sealing plug is fixedly arranged inside the oil injection pipe (23).

4. The mechanical claw for handling ton bags according to claim 1, characterized in that: Inside the two sets of support frames (4), support sliding rods (19) passing through the two sets of extension hooks (5) are fixedly arranged. Between the two sets of extension hooks (5) and the two sets of support frames (4) and outside the support sliding rod (19), first springs (20) are fixed.

5. The mechanical claw for handling ton bags according to claim 1, characterized in that: At the top of the intermediate hook (6), a second spring (21) fixedly connected to the inside of the connecting frame (3) is fixedly arranged, and the second spring (21) and the intermediate hook (6) are fixedly connected by screws.

6. The mechanical claw for handling ton bags according to claim 2, wherein: At one end of the two sets of support frames (4), a fixing frame (22) matching with the piston cylinder (10) is fixedly arranged, and a sliding groove matching with the sliding frame (8) is formed inside the fixing frame (22).

7. The mechanical claw for handling ton bags according to claim 4, characterized in that: At both ends inside the two sets of extension hooks (5), first sliding holes (24) slidingly connected to the support frames (4) are formed. At the middle position inside the two sets of extension hooks (5), second sliding holes (25) matching with the support sliding rods (19) are formed.

8. The mechanical claw for handling ton bags according to claim 1, wherein: The robotic claw body (1) and the two sets of robotic arms (2) are rotatably connected through a rotating shaft (26), and a transmission mechanism is arranged inside the robotic claw body (1).

9. The mechanical claw for handling ton bags according to claim 1, characterized in that: At the middle position of the top of the robotic claw body (1), a connecting ring (27) is fixedly arranged, and an anti-slip ring is fixedly arranged on the inner wall of the connecting ring (27).

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