Internal pulling type lifting appliance for metal pressing block

Abstract

The utility model relates to the technical field of lifting appliances, in particular to an internal pulling type lifting appliance for a metal pressing block, which comprises a combined beam, a clamping mechanism and a lifting mechanism, the combined beam comprises a main beam and a lead screw; the clamping mechanism comprises a main arm, a chuck, a chuck front arm, a chuck rear arm and a torsion spring; the lifting mechanism comprises a lifting rod, a compression spring, an adjusting plate, a connecting plate, an outer gear ratchet wheel, a rack and a connecting rod. When the clamping device is used, the angle of the chuck can be adjusted by loosening the bolt on the front arm of the chuck so as to adapt to pressing blocks in different shapes, and the pressing blocks can be clamped at the optimal stress point; the distance between the telescopic beams is also adjustable, so that the telescopic beams can adapt to the hoisting of pressing blocks with different sizes; and the types of prepared lifting appliances can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to an internal pull-type lifting equipment for metal blocks. Background Technology

[0002] Large quantities of scrap metal, such as scrap steel, scrap aluminum, and scrap copper, are generated in industrial and agricultural production and daily life. These scrap metals are a valuable resource that can be recycled. However, because these wastes contain a large amount of lightweight materials, they cause inconvenience in transportation, storage, and use.

[0003] To address these issues, the current standard practice is to briquette these thin materials. However, there is currently no unified standard for briquette products, resulting in significant differences in shape, size, and weight among briquettes produced by different manufacturers. The mainstream products on the market come in various shapes, including rectangular, circular, and polygonal cross-sections, and the weight of individual briquettes ranges from tens to hundreds of kilograms. Therefore, handling these briquettes is challenging. While magnetic equipment can be used to handle scrap steel in most cases, there are currently no safe and efficient lifting tools available for scrap aluminum, scrap copper, and other scrap metal briquettes. Existing lifting tools generally use simple clamps, but these clamps are double-armed, with a large distance between the force application point and the point of contact. Furthermore, the clamp arms are slender rod-shaped components, making them prone to deformation, unstable, and insecure. The small contact area between the clamp and the material being lifted makes it difficult to control the center of gravity, leading to tilting and detachment of the briquette during lifting, resulting in poor safety. The lifting and unloading of briquettes requires considerable manual assistance, resulting in low work efficiency. Additionally, the opening range of these clamps is limited, often necessitating the preparation of multiple lifting tools. Summary of the Invention

[0004] This invention provides an internal pull-type lifting device for metal blocks. The clamp angle and opening of the lifting device are adjustable within a certain range, which can adapt to the lifting of blocks of different shapes and specifications, and solve the problem of needing to prepare multiple lifting devices.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An internal pull-type lifting device for metal blocks includes a combined beam, a clamping mechanism, and a lifting mechanism;

[0007] The composite beam includes a main beam and a lead screw. The lead screw is located inside the main beam and has an adjusting wheel in the middle. Telescopic beams are located on both sides of the main beam and are threadedly connected to the lead screw. The telescopic beams can slide along the main beam. An opening is located in the middle of the main beam, and its position corresponds to the position of the adjusting wheel. Limiting blocks are located on both sides of the adjusting wheel and are connected to the main beam.

[0008] The composite beam consists of two sets, with a spacer beam between the two sets. The two ends of the spacer beam are connected to the middle of the main beam. The end of the telescopic beam is connected to a clamping mechanism.

[0009] The clamping mechanism comprises a main arm, a chuck, a chuck front arm, a chuck rear arm, and a torsion spring; one end of the main arm is hinged to a telescopic beam, and the other end is hinged to the chuck rear arm via a first pin, with the torsion spring mounted on the first pin; a limiting shaft is provided at the bottom of the main arm to limit the position of the chuck rear arm; the chuck front arm is positioned above the chuck rear arm and is connected by bolts; the chuck is mounted on the chuck front arm via a second pin; the chuck is a ratchet mechanism.

[0010] The lifting mechanism includes a lifting rod, a compression spring, an adjusting plate, a connecting plate, an external gear ratchet, a rack, and a connecting rod;

[0011] The boom consists of a ring and a rod. The rod passes through the spacer beam and its bottom end is connected to the connecting plate. Two tie rods A are hinged to one side of the connecting plate and two tie rods B are hinged to the other side. The other ends of tie rods A and B are hinged to the main boom. Both tie rods A and B have an arc-shaped protrusion in the middle.

[0012] Both the adjusting plate and the compression spring are sleeved on the rod. The adjusting plate is connected to the rod by a thread, and the compression spring is located between the adjusting plate and the spacer beam. A counterweight is connected to the bottom of the connecting plate.

[0013] There are two racks, one end of which is hinged to the arc-shaped protrusion of the pull rod A, and the other end of which passes through the pull rod B and its arc-shaped protrusion and is connected to the connecting rod; the external gear ratchet is installed on the arc-shaped protrusion of the pull rod B and meshes with the rack.

[0014] The contact surfaces of the chuck forearm and chuck rear arm are such that if the forearm surface has radial grooves, the rear arm surface has radial protrusions, or if the forearm surface has radial protrusions, the rear arm surface has radial grooves; the radial protrusions and radial grooves are matched.

[0015] A reinforcing beam is provided between the two sets of composite beams. The reinforcing beam is located on both sides of the partition beam and its two ends are connected to the main beam.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] When this utility model is applied, the angle of the clamp can be adjusted by loosening the bolts on the forearm of the clamp to accommodate different shaped blocks and clamp them at the optimal stress point; the spacing of the telescopic beams is also adjustable to accommodate the lifting of blocks of different sizes; therefore, this utility model can reduce the types of lifting tools required.

[0018] This invention allows for autonomous unloading without the need for manual assistance, reducing labor intensity and improving work efficiency. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram illustrating the application of an internal pull-type lifting device for metal blocks according to this utility model.

[0021] Figure 2 This is a structural schematic diagram of an internal pull-type lifting device for metal pressing blocks according to this utility model.

[0022] Figure 3 This is a structural schematic diagram of the composite beam of this utility model.

[0023] Figure 4 It is an AA sectional view.

[0024] Figure 5 It is a CC sectional view.

[0025] Figure 6 This is a schematic diagram of radial protrusions.

[0026] Figure 7 This is a schematic diagram of radial trenches.

[0027] Explanation of reference numerals in the attached figures:

[0028] In the diagram: 1. Composite beam 2. Clamping mechanism 3. Lifting mechanism 4. Pressure block 11. Main beam 12. Lead screw 13. Adjusting wheel 14. Telescopic beam 15. Opening 16. Limiting block 17. Spacing beam 18. Reinforcing beam 21. Main arm 22. Chuck 23. Chuck front arm 24. Chuck rear arm 25. Torsion spring 26. Pin 1 27. Limiting shaft 28. Pin 2 29. Radial protrusion 30. Radial groove 31. Hanging rod 32. Compression spring 33. Adjusting plate 34. Connecting plate 35. External gear ratchet 36. Rack 37. Connecting rod 38. Pull rod A 39. Pull rod B 40. Arc-shaped protrusion 41. Counterweight 301. Ring 302. Rod Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0031] like Figures 1 to 7As shown, this utility model provides an internal pull-type lifting device for metal blocks, including a combined beam 1, a clamping mechanism 2 and a lifting mechanism 3.

[0032] The composite beam 1 includes a main beam 11 and a lead screw 12. The lead screw 12 is located inside the main beam 11, and an adjusting wheel 13 is provided in the middle of the lead screw 12. Telescopic beams 14 are provided on both sides of the main beam 11, and the telescopic beams 14 are threadedly connected to the lead screw 12, allowing them to slide along the main beam 11. An opening 15 is provided in the middle of the main beam 11, the position of which corresponds to the position of the adjusting wheel 13. Limiting blocks 16 are provided on both sides of the adjusting wheel 13, and the limiting blocks 16 are fixedly connected to the main beam 11, which can be done by welding.

[0033] The screw threads on both sides of the adjusting wheel 13 rotate in opposite directions. That is, by rotating the adjusting wheel 13, the telescopic beams 14 located on both sides of the main beam 11 move closer to the adjusting wheel 13 or further away from the adjusting wheel 13.

[0034] The composite beam 1 consists of two sets, with a spacer beam 17 between the two sets of composite beams 11. The two ends of the spacer beam 17 are welded to the middle of the main beam 11 respectively.

[0035] A reinforcing beam 18 is provided between the two sets of composite beams 1. The reinforcing beam 18 is located on both sides of the spacer beam 17, and the two ends of the reinforcing beam 18 are welded to the main beam 11.

[0036] The end of the telescopic beam 14 is connected to the clamping mechanism 2.

[0037] The clamping mechanism 2 comprises a main arm 21, a chuck 22, a chuck front arm 23, a chuck rear arm 24, and a torsion spring 25. One end of the main arm 21 is hinged to the telescopic beam 14, and the other end is hinged to the chuck rear arm 24 via a pin 26. The torsion spring 25 is mounted on the pin 26. A limiting shaft 27 is provided at the bottom of the main arm 21 to limit the position of the chuck rear arm 24. The chuck front arm 23 is positioned above the chuck rear arm 24 and is connected by bolts. The chuck 22 is mounted on the chuck front arm 23 via a pin 28. The chuck 22 is a ratchet mechanism that rotates in one direction, opposite to the direction in which the pressure block 4 falls, facilitating clamping operations. The surface of the chuck 22 has teeth, which increases the friction with the surface of the pressure block and improves the firmness of clamping the material block.

[0038] The lifting mechanism 3 includes a lifting rod 31, a compression spring 32, an adjusting plate 33, a connecting plate 34, an external gear ratchet 35, a rack 36, and a connecting rod 37.

[0039] The boom 31 consists of a ring portion 301 and a rod portion 302. The rod portion 302 passes through the spacer beam 17 (the rod portion 302 can slide up and down relative to the spacer beam 17), and its bottom end is connected to the connecting plate 34. Two tie rods A38 are hinged to one side of the connecting plate 34, and two tie rods B39 are hinged to the other side. The other ends of both tie rods A38 and B39 are hinged to the main boom 21. Both tie rods A38 and B39 have an arc-shaped protrusion 40 in the middle.

[0040] The adjusting plate 33 and the compression spring 32 are both sleeved on the rod 302. The adjusting plate 33 is connected to the rod 302 by a thread on the rod 302. The compression spring 32 is located between the adjusting plate 33 and the spacer beam 17. The elastic force of the compression spring 32 can be adjusted by rotating the adjusting plate 33. The bottom of the connecting plate 34 is connected to a counterweight 41.

[0041] There are two racks 36. One end of each rack 36 is hinged to the arc-shaped protrusion 40 of the pull rod A38, and the other end of each rack 36 passes through the pull rod B39 and its arc-shaped protrusion 40. Both ends of the connecting rod 37 are connected to the ends of the racks 36. The external gear ratchet 35 is mounted on the arc-shaped protrusion 40 of the pull rod B39 and meshes with the racks 36. The external gear ratchet 35 can only rotate in one direction (Note: it rotates when the opening of the lifting device increases and does not rotate when it decreases).

[0042] The contact surfaces of the chuck front arm 23 and the chuck rear arm 24 are such that if the surface of the chuck front arm 23 is a radial groove 30, then the surface of the chuck rear arm 24 is a radial protrusion 29, or vice versa. The radial protrusions 29 and radial grooves 30 are matched. When the bolts on the chuck front arm 23 are tightened, the protrusions and grooves match, increasing friction and preventing the chuck 22 from rotating during lifting.

[0043] The work process is as follows:

[0044] The internal pull-out lifting device provided by this utility model needs to be used in conjunction with a crane.

[0045] Before hoisting the compressed blocks 4, adjust the spacing of the telescopic beams 14 according to the size and shape of each batch of blocks, rotating the adjusting wheel 13 to match the size of the batch of blocks to be hoisted. After adjusting the spacing, loosen the bolts on the chuck front arm 23, rotate the chuck according to the shape of the compressed blocks 4, and adjust the angle so that the chuck 22 matches the shape of the compressed blocks 4 for easy clamping. After adjusting the angle, tighten the bolts.

[0046] After the preparation work is completed, when hoisting the pressure block, first align the lifting device with the pressure block 4, and then lower the lifting device from the top to guide the pressure block 4 into the lifting device. As the lifting device descends, the arc-shaped protrusions 40 of the pull rods A 38 and B 39 contact the top of the pressure block 4, and the descent of the lifting device is hindered. Under the gravity of the lifting mechanism 3 (mainly the counterweight), the pull rods A 38 and B 39 extend outward at the same time, opening up the two main booms 21.

[0047] If the chuck 22 is obstructed due to the edge of the pressure block or the surface it is clamping, the chuck 22, the chuck front arm 23, and the chuck rear arm 24 will rotate towards the main arm 21 (around the pin 26), allowing the chuck 22 to smoothly pass through the obstructed part and reach the required clamping position of the pressure block 4. Due to the action of the torsion spring 25, the chuck 22 always maintains a close contact with the clamped surface of the pressure block 4, and finally, under the action of the torsion spring 25, the chuck 22 returns to its original position.

[0048] When preparing for lifting, manually pull up connecting rod 37 to disengage rack 36 from external gear ratchet 35, and begin lifting. At this time, the crane gradually bears part of the weight of lifting mechanism 3, compression spring 32 springs up, and pull rods A38 and B39 are pulled, causing main boom 21 to retract, and clamp chuck 22 to clamp pressure block 4. After lifting, lower connecting rod 37, and rack 36 and external gear ratchet 35 will re-engage. Under the weight of pressure block 4 and the action of compression spring 32, pressure block 4 is clamped and can then be lifted to the designated position.

[0049] When the block 4 needs to be removed, the crane hook descends and the lifting device descends. When the block 4 contacts the ground or the stack of materials, the lifting mechanism 3 of the lifting device continues to descend. When the tie rods A38 and B39 contact the upper surface of the block 4, the descent of the lifting device is blocked. Then, the tie rods A38 and B39 open the main boom 21 and the chuck 22 leaves the surface of the block, thus realizing the action of removing the block.

[0050] Because the rack 36 and the external gear ratchet 35 are engaged, the external gear ratchet 35 will not rotate during lifting after unloading, and the opening of the lifting device will not shrink. This completes the unloading work. When continuing the operation, the lifting device can be moved to the next pressure block 4 position, placed directly on the pressure block 4, and the lifting device is lowered. The connecting rod 37 is then pulled up, and the lifting of the pressure block 4 is repeated. This process can be repeated to complete the lifting of the pressure block 4.

[0051] The preferred embodiments of this utility model have been described in detail above with reference to the accompanying drawings. However, this utility model is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model, and these simple modifications all fall within the protection scope of this utility model. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately. Furthermore, various different embodiments of this utility model can also be arbitrarily combined, as long as they do not violate the spirit of this utility model, they should also be considered as the content disclosed by this utility model.

Claims

1. An internal pull-type lifting device for metal blocks, characterized in that, Includes a composite beam, a clamping mechanism, and a lifting mechanism; The composite beam includes a main beam and a lead screw. The lead screw is located inside the main beam and has an adjusting wheel in the middle. Telescopic beams are located on both sides of the main beam and are threadedly connected to the lead screw. The telescopic beams can slide along the main beam. An opening is located in the middle of the main beam, and its position corresponds to the position of the adjusting wheel. Limiting blocks are located on both sides of the adjusting wheel and are connected to the main beam. The composite beam consists of two sets, with a spacer beam between the two sets. The two ends of the spacer beam are connected to the middle of the main beam. The end of the telescopic beam is connected to a clamping mechanism. The clamping mechanism comprises a main arm, a chuck, a chuck front arm, a chuck rear arm, and a torsion spring; one end of the main arm is hinged to a telescopic beam, and the other end is hinged to the chuck rear arm via a first pin, with the torsion spring mounted on the first pin; a limiting shaft is provided at the bottom of the main arm to limit the position of the chuck rear arm; the chuck front arm is positioned above the chuck rear arm and is connected by bolts; the chuck is mounted on the chuck front arm via a second pin; the chuck is a ratchet mechanism. The lifting mechanism includes a lifting rod, a compression spring, an adjusting plate, a connecting plate, an external gear ratchet, a rack, and a connecting rod; The boom consists of a ring and a rod. The rod passes through the spacer beam and its bottom end is connected to the connecting plate. Two tie rods A are hinged to one side of the connecting plate and two tie rods B are hinged to the other side. The other ends of tie rods A and B are hinged to the main boom. Both tie rods A and B have an arc-shaped protrusion in the middle. Both the adjusting plate and the compression spring are sleeved on the rod. The adjusting plate is connected to the rod by a thread, and the compression spring is located between the adjusting plate and the spacer beam. A counterweight is connected to the bottom of the connecting plate. There are two racks, one end of which is hinged to the arc-shaped protrusion of the pull rod A, and the other end of which passes through the pull rod B and its arc-shaped protrusion and is connected to the connecting rod; the external gear ratchet is installed on the arc-shaped protrusion of the pull rod B and meshes with the rack.

2. The internal pull-type lifting device for metal blocks according to claim 1, characterized in that, The contact surfaces of the chuck forearm and chuck rear arm are such that if the forearm surface has radial grooves, the rear arm surface has radial protrusions, or if the forearm surface has radial protrusions, the rear arm surface has radial grooves; the radial protrusions and radial grooves are matched.

3. The internal pull-type lifting device for metal blocks according to claim 1, characterized in that, A reinforcing beam is provided between the two sets of composite beams. The reinforcing beam is located on both sides of the partition beam and its two ends are connected to the main beam.

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