Electric plate ingot lifting appliance

Abstract

The invention discloses an electric plate ingot lifting appliance, and belongs to the technical field of plate ingot lifting appliances, the electric plate ingot lifting appliance comprises a lifting appliance upper frame, supporting seats, an electric opening and closing mechanism, wide clamping arms, narrow clamping arms and a gripper device, the supporting seats are arranged on the two sides of the bottom of the lifting appliance upper frame, a group of wide clamping arms and narrow clamping arms are oppositely arranged below each supporting seat, and the gripper device is arranged below the wide clamping arms and the narrow clamping arms. The upper ends of the wide clamping arm and the narrow clamping arm are both connected with the electric opening and closing mechanism located in the supporting seat, and the inner sides of the lower ends of the wide clamping arm and the narrow clamping arm are both provided with the gripper devices. According to the electric plate ingot lifting appliance, the wide clamping arm and the narrow clamping arm are controlled to move through the electric opening and closing mechanism, clamping and lifting are carried out, and the electric plate ingot lifting appliance has the advantages of being controllable in clamping force, high in automation degree, reliable in clamping and high in safety performance. Besides, the wide clamping arms and the narrow clamping arms which are of special structures are adopted in the electric plate ingot lifting appliance, the structure is compact, the wide clamping arms and the narrow clamping arms are matched with the limiting rollers and the floating plates, and on the basis that the bearing performance is improved, the service life of the electric opening and closing mechanism is prolonged.

Description

Technical Field

[0001] This invention relates to the field of plate ingot lifting tools, specifically an electric plate ingot lifting tool. Background Technology

[0002] In the smelting and processing industries of non-ferrous metals (such as aluminum and copper) or ferrous metals, slab ingots are a common form of intermediate product. These slab ingots are typically heavy (up to several tons), have high surface temperatures (after hot rolling or casting), and are densely stacked. Therefore, the transfer, stacking, and loading of slab ingots are important parts of the production process, placing high demands on the safety, reliability, and efficiency of lifting equipment.

[0003] Currently, the slab lifting devices commonly used in the industry are mainly divided into the following two categories: 1. Manual or semi-mechanical slab lifting tools (such as lever-type lifting clamps): These types of lifting devices typically utilize the weight of the ingot itself to achieve clamping through leverage. They are simple in structure and low in cost. However, they have significant drawbacks in practical use: Low level of automation and cumbersome operation: Each hoisting operation requires manual hooking and alignment, and relies on the operator's experience to judge whether the clamp is tight, which is not only labor-intensive, but also inefficient. Poor safety: It relies entirely on the weight of the ingot itself for clamping. If it shakes or is impacted during lifting, operation or placement, it is easy for the clamping force to be insufficient, causing the ingot to slip and posing a serious threat to personnel and equipment. Limited adaptability: For ingots of different specifications (especially thickness), manual adjustment or replacement of lifting clamps is required, which makes it difficult to achieve rapid adaptation and affects the production rhythm; 2. Traditional hydraulically driven slab lifting device: To address the issue of uncontrollable clamping force in manual lifting devices, hydraulically driven slab lifting devices have emerged. These devices provide active clamping force through hydraulic cylinders, resulting in a large and relatively stable clamping force. However, they also have inherent drawbacks: The system is complex and has high maintenance costs: it requires an independent hydraulic station, oil circuit, control valves, etc., and has a large structure. In harsh industrial environments (such as high temperature and dust), the hydraulic system is prone to leakage, pollution and failure, and the maintenance workload is large and highly professional.

[0004] Energy consumption and environmental issues: Hydraulic systems suffer from energy conversion efficiency losses, and hydraulic oil leaks can cause environmental pollution.

[0005] Inconvenient installation and relocation: Reliance on external hydraulic power sources or large self-contained power units limits their flexible application in certain locations or on vehicles.

[0006] In summary, existing slab lifting tools have varying degrees of shortcomings in terms of safety, automation level, operating and maintenance costs, and environmental adaptability. With the continuous improvement of industrial automation, the market urgently needs a new type of slab lifting tool that is compact in structure, has controllable clamping force, a high degree of automation, is easy to maintain, and is suitable for harsh working conditions. Summary of the Invention

[0007] In view of this, the present invention provides an electric plate lifting device to address the shortcomings of the prior art.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an electric slab ingot lifting device, including a lifting device frame, a support base, an electric opening and closing mechanism, a wide clamping arm, a narrow clamping arm, and a jaw device. The support base is provided on both sides of the bottom of the lifting device frame. A set of wide clamping arms and narrow clamping arms are arranged opposite each other under each support base. The upper ends of the wide clamping arms and narrow clamping arms are connected to the electric opening and closing mechanism located in the support base. The jaw device is provided on the inner side of the lower end of the wide clamping arms and narrow clamping arms.

[0009] Furthermore, the electric opening and closing mechanism includes a geared motor, a trapezoidal lead screw, and a trapezoidal nut. The geared motor is located at one end of the support base, and its output shaft is connected to the trapezoidal lead screw. The trapezoidal nut is fixed to the top of both the wide and narrow clamping arms, and the trapezoidal nut is threadedly connected to the trapezoidal lead screw.

[0010] Furthermore, both the wide clamping arm and the narrow clamping arm include two L-shaped clamping plates and a connecting seat connected to the top of the two L-shaped clamping plates. The distance between the two L-shaped clamping plates of the wide clamping arm is greater than the distance between the two L-shaped clamping plates of the narrow clamping arm, and the upper part of the narrow clamping arm is inserted into the inner side of the upper part of the wide clamping arm; the trapezoidal nut is floatingly connected to the connecting seat.

[0011] Furthermore, a floating plate is fixedly installed at one end of the trapezoidal nut, and floating grooves are opened on both sides of the connecting seat. The height of the floating grooves is greater than the height of the floating plate, and the two ends of the floating plate extend out from the floating grooves on both sides respectively.

[0012] Furthermore, two limiting rollers are provided between the wide clamping arm and the narrow clamping arm in the same group. A limiting hole is opened laterally on the upper part of the L-shaped clamping plate. The two limiting rollers pass through the limiting holes of the wide clamping arm and the narrow clamping arm, and the shafts at both ends of the limiting rollers are rotatably connected to both sides of the support base. A limiting plate is provided at both ends of the limiting rollers. The limiting plate is located outside the wide clamping arm, and the diameter of the limiting plate is greater than the height of the limiting hole.

[0013] Furthermore, a weighing sensor is installed on the connecting seat of the wide clamping arm. When the weighing sensor detects that the clamping has reached a preset value, the switch of the electric opening and closing mechanism is disconnected.

[0014] Furthermore, the clamping device includes a clamping block with a parallelogram-shaped longitudinal section. The two sides of the clamping block are obliquely and slidably connected to the inner sides of the two L-shaped clamping plates, respectively. A connecting block is provided on the top of the clamping block. A spring is connected to both sides of the connecting block. The upper ends of the two springs are connected to the fixing plate between the two L-shaped clamping plates.

[0015] Furthermore, casters are installed at all four corners of the top of the lifting frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention relates to an electric slab lifting device, wherein support seats are provided on both sides of the bottom of the lifting device frame, and a set of wide clamping arms and narrow clamping arms are provided opposite to each support seat. The upper ends of the wide clamping arms and narrow clamping arms are connected to an electric opening and closing mechanism located inside the support seat, and a jaw device is provided on the inner side of the lower end of the wide clamping arms and narrow clamping arms. The movement of the wide clamping arms and narrow clamping arms is controlled by the electric opening and closing mechanism to perform clamping and lifting. The device has a compact structure, good stability, reliable clamping, and high safety performance.

[0017] The electric ingot lifting device of this invention uses a geared motor, a trapezoidal screw, and a trapezoidal nut for the electric opening and closing mechanism. The geared motor provides rotational power to the trapezoidal screw. The tops of both the wide and narrow clamping arms are fixed with trapezoidal nuts, which are threadedly connected to the trapezoidal screw. The rotation of the screw can move the wide and narrow clamping arms away from or closer to each other. On the one hand, the screw structure is simple and easy to maintain; on the other hand, the self-locking property of the trapezoidal screw and trapezoidal nut can ensure stable, safe, and reliable clamping.

[0018] The electric slab ingot lifting device of this invention features a frame structure in which both the wide and narrow clamping arms are supported and connected by two L-shaped clamping plates. The upper part of the narrow clamping arm is inserted into the inner side of the upper part of the wide clamping arm, and two rotatable limiting rollers are inserted between the wide and narrow clamping arms. Through the compact combination structure of the wide and narrow clamping arms and the support base frame, supplemented by the support, connection and guiding function of the two limiting rollers, the wide and narrow clamping arms can move smoothly under the action of the lead screw. On the other hand, the overall stability of the lifting device is greatly improved, which can meet the needs of 37t slab ingots.

[0019] The electric ingot lifting device of the present invention has a connecting seat at the top of two L-shaped clamps. The trapezoidal nut and the connecting seat are connected by a floating method. A floating plate is fixed at one end of the trapezoidal nut. Floating grooves are opened on both sides of the connecting seat. The two ends of the floating plate extend from the floating grooves on both sides. This allows the nut to move slightly up, down and left and right with the jump of the lead screw, avoiding the nut from getting stuck. Moreover, under the action of the two limit rollers, the torque can be effectively transmitted, which improves the service life of the lead screw and the nut.

[0020] The electric slab lifting device of the present invention has a load cell installed on the connecting seat of the wide clamping arm. When the clamping arm touches the slab, the motor continues to rotate, and the nut presses the load cell. After the load cell detects that the clamping has reached the preset value, it disconnects the opening and closing drive. At the same time, the green indicator light on the electrical control cabinet flashes to remind the operator that the clamping is in place.

[0021] The electric slab lifting device of the present invention has a jaw block that is inclined and slidably connected to the inner side of the two L-shaped clamping plates of the clamping arm, which can prevent the slab from falling off when the clamping force of the motor is insufficient. After the motor provides pre-clamping force, the lifting device lifts the slab upward, and the slab drives the jaw to slide downward along the clamping arm. The opening size of the clamp becomes smaller, and the clamp will clamp tighter and tighter under the influence of the spring and the weight of the slab, ensuring the clamping safety. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the wide clamping arm in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the electric opening and closing mechanism in an embodiment of the present invention; Figure 5 This is a schematic diagram of the jaw device in an embodiment of the present invention; Figure 6 This is a front view of an embodiment of the present invention; Figure 7 This is a side view of an embodiment of the present invention; In the diagram: 1-Lifting device upper frame, 2-Support base, 3-Electric opening and closing mechanism, 4-Wide clamping arm, 5-Narrow clamping arm, 6-Pinching claw device, 7-Connecting seat, 8-Limiting roller, 9-Limiting hole, 11-Limiting disc, 12-Lifting wheel, 31-Gear motor, 32-Trapezoidal lead screw, 33-Trapezoidal nut, 34-Floating plate, 35-Floating groove, 61-Pinch block, 62-Protrusion, 63-Connecting block, 64-Spring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0024] Example: Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The electric slab lifting device includes a lifting frame 1, a support base 2, an electric opening and closing mechanism 3, a wide clamping arm 4, a narrow clamping arm 5, and a jaw device 6. The support base 2 is provided on both sides of the bottom of the lifting frame 1. A set of wide clamping arms 4 and narrow clamping arms 5 are arranged opposite each other under each support base 2. The upper ends of the wide clamping arms 4 and narrow clamping arms 5 are connected to the electric opening and closing mechanism 3 located in the support base 2. The jaw device 6 is provided on the inner side of the lower end of the wide clamping arms 4 and narrow clamping arms 5.

[0025] The electric opening and closing mechanism 3 includes a reduction motor 31, a trapezoidal lead screw 32, and a trapezoidal nut 33. The reduction motor 31 is located at one end of the support base 2, and its output shaft is connected to the trapezoidal lead screw 32. The trapezoidal nut 33 is fixed to the top of both the wide clamping arm 4 and the narrow clamping arm 5. The trapezoidal nut 33 is threadedly connected to the trapezoidal lead screw 32.

[0026] Both the wide clamping arm 4 and the narrow clamping arm 5 include two L-shaped clamping plates and a connecting seat 7 connected to the top of the two L-shaped clamping plates. The distance between the two L-shaped clamping plates of the wide clamping arm 4 is greater than the distance between the two L-shaped clamping plates of the narrow clamping arm 5, and the upper part of the narrow clamping arm 5 is inserted into the upper inner side of the wide clamping arm 4. The trapezoidal nut 33 is floatingly connected to the connecting seat 7.

[0027] A floating plate 34 is fixedly installed at one end of the trapezoidal nut 33. Floating grooves 35 are opened on both sides of the connecting seat 7. The height of the floating grooves 35 is greater than the height of the floating plate 34. The two ends of the floating plate 34 extend out from the floating grooves 35 on both sides respectively.

[0028] Two limiting rollers 8 are provided between the wide clamping arm 4 and the narrow clamping arm 5 in the same group. A limiting hole 9 is opened laterally on the upper part of the L-shaped clamping plate. The two limiting rollers 8 pass through the limiting holes of the wide clamping arm 4 and the narrow clamping arm 5. The shafts at both ends of the limiting rollers 8 are rotatably connected to the two sides of the support base 2 respectively. A limiting plate 11 is provided at both ends of the limiting rollers 8. The limiting plate 11 is located outside the wide clamping arm 4. The diameter of the limiting plate 11 is greater than the height of the limiting hole 9, and the diameter of the limiting roller 8 is slightly smaller than the height of the limiting hole 9.

[0029] An annular weighing sensor is installed on the connecting seat 7 of the wide clamping arm 4. When the annular weighing sensor detects that the clamping reaches a preset value (at which point the annular weighing sensor is in contact with and squeezed by the trapezoidal nut), the switch of the electric opening and closing mechanism 3 is disconnected.

[0030] The clamping device 6 includes a clamping block 61 with a parallelogram-shaped longitudinal section. The two sides of the clamping block 61 are inclined and slidably connected to the inner sides of the two L-shaped clamping plates respectively. The two sides of the clamping block 61 are provided with protrusions 62. The inner sides of the two L-shaped clamping plates are provided with sliding grooves. The protrusions 62 are movably disposed in the sliding grooves. The top of the clamping block 61 is provided with a connecting block 63. A spring 64 is connected to both sides of the connecting block 63. The upper ends of the two springs 64 are connected to the fixing plate between the two L-shaped clamping plates.

[0031] Reference Figure 6 , Figure 7 In another embodiment, lifting wheels 12 are installed at the four corners of the top of the lifting frame 1. In order to meet the lifting requirements of 37-ton slab ingots, a double lifting wheel structure is adopted at each of the four corners.

[0032] The working principle of the electric ingot lifting device in this embodiment of the invention is as follows: In the initial state, the wide clamping arm 4 and the narrow clamping arm 5 are far apart. When lifting the ingot, the lifting device moves downward so that the ingot is between the wide clamping arm 4 and the narrow clamping arm 5. Then, the reduction motor 31 of the electric opening and closing mechanism 3 starts, and the trapezoidal screw 32 rotates, so that the wide clamping arm 4 and the narrow clamping arm 5 move closer to each other. When the clamping arm touches the ingot, the reduction motor 31 continues to rotate, and the trapezoidal nut 33 presses the annular weighing sensor on the connecting seat 7 of the wide clamping arm 4. After the annular weighing sensor detects that the clamping has reached the preset value, it disconnects the electric opening and closing mechanism 3. At the same time, the green indicator light on the control cabinet flashes to indicate to the operator that the clamping is in place and the next operation can be carried out.

[0033] The electric ingot lifting device of this invention employs a geared motor, a trapezoidal lead screw, and a trapezoidal nut in its electric opening and closing mechanism. The geared motor provides rotational power to the trapezoidal lead screw. Trapezoidal nuts are fixed to the tops of both the wide and narrow clamping arms and are threadedly connected to the trapezoidal lead screw. Rotation of the lead screw allows the wide and narrow clamping arms to move away from or closer to each other. On one hand, the lead screw structure is simple and easy to maintain; on the other hand, the self-locking properties of the trapezoidal lead screw and trapezoidal nut ensure stable and reliable clamping. Furthermore, both the wide and narrow clamping arms utilize two L-shaped clamping plates. The supporting frame structure has a narrow clamping arm inserted into the inner side of the upper part of the wide clamping arm, and two rotatable limiting rollers passing between the wide and narrow clamping arms. Through the compact combination of the wide and narrow clamping arms and the support base frame structure, supplemented by the support, connection, and guiding functions of the two limiting rollers, the wide and narrow clamping arms can move smoothly under the action of the lead screw. Furthermore, the overall stability of the lifting device is greatly improved, meeting the requirements for use with 37t ingots. Additionally, connecting seats are provided at the top of the two L-shaped clamping plates, and trapezoidal nuts are connected to... The connecting seat adopts a floating connection method. A floating plate is fixed at one end of the trapezoidal nut, and floating grooves are opened on both sides of the connecting seat. The two ends of the floating plate extend from the floating grooves on both sides, which allows the nut to move slightly up, down, left, and right with the jump of the lead screw, avoiding the nut from getting stuck. Moreover, under the action of the two limit rollers, the torque can be effectively transmitted, improving the service life of the lead screw and nut. In addition, a weighing sensor is installed on the connecting seat of the wide clamping arm. When the clamping arm touches the ingot, the motor continues to rotate, and the nut presses against the weighing sensor. The weighing sensor detects that the clamping has reached the preset value and then disconnects the opening and closing drive to achieve automated control. This not only reduces human intervention and has high safety, but also makes the clamping force controllable. In addition, the clamping blocks of the jaw device are inclined and slidingly connected to the inner side of the two L-shaped clamping plates of the clamping arm, which can prevent the ingot from falling off when the motor clamping force is insufficient. After the motor provides the pre-clamping force, the lifting device lifts the ingot upward. The ingot drives the jaws to slide downward along the clamping arm. The size of the clamp opening becomes smaller. The clamp will clamp tighter and tighter under the influence of the spring and the weight of the ingot. In addition, the trapezoidal copper nut is self-locked on the lead screw to ensure the clamping safety.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still make modifications or equivalent substitutions to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the claims of the present invention.

Claims

1. An electrically powered pallet spreader, characterized by: The lifting appliance frame is provided with support seats at both sides of the bottom, a set of wide clamping arms and narrow clamping arms are arranged opposite to each support seat, the wide clamping arms and the narrow clamping arms are connected with the electric opening and closing mechanism arranged in the support seat at the upper end, and the claw device is arranged at the inner side of the lower end of the wide clamping arms and the narrow clamping arms.

2. The motorized spool hoist of claim 1, wherein: The electric opening and closing mechanism comprises a reduction motor, a trapezoidal screw and a trapezoidal nut, the reduction motor is arranged at one end of the support seat, the output shaft is connected with the trapezoidal screw, the trapezoidal nut is fixed at the top of the wide clamping arms and the narrow clamping arms, and the trapezoidal nut is threadedly connected with the trapezoidal screw.

3. The motorized spool hoist of claim 2, wherein: The wide clamping arms and the narrow clamping arms each comprise two L-shaped clamping plates and a connecting seat connected at the top of the two L-shaped clamping plates, the distance between the two L-shaped clamping plates of the wide clamping arms is greater than the distance between the two L-shaped clamping plates of the narrow clamping arms, and the upper part of the narrow clamping arms is inserted into the inner side of the upper part of the wide clamping arms; the trapezoidal nut is floatingly connected with the connecting seat.

4. The motorized spool hoist of claim 3, wherein: One end of the trapezoidal nut is fixedly provided with a floating plate, floating grooves are formed at both sides of the connecting seat, the height of the floating grooves is greater than the height of the floating plate, and both ends of the floating plate extend out of the floating grooves at both sides.

5. The motorized spool hoist of claim 3, wherein: Two limiting rollers are arranged between the wide clamping arms and the narrow clamping arms in the same group, limiting holes are horizontally formed at the upper part of the L-shaped clamping plates, the two limiting rollers pass through the limiting holes of the wide clamping arms and the narrow clamping arms, and the shaft rods at both ends of the limiting rollers are rotatably connected with both sides of the support seat; limiting discs are arranged at both ends of the limiting rollers, the limiting discs are located outside the wide clamping arms, and the diameter of the limiting discs is greater than the height of the limiting holes.

6. The motorized spool hoist of claim 4, wherein: A weighing sensor is arranged on the connecting seat of the wide clamping arms, and the electric opening and closing mechanism switch is disconnected when the weighing sensor monitors that the clamping reaches a preset value.

7. The motorized spool hoist of claim 3, wherein: The claw device comprises a claw block with a longitudinal section in the shape of a parallelogram, the claw block is slidably connected with the inner sides of the two L-shaped clamping plates at both sides, a connecting block is arranged at the top of the claw block, springs are connected at both sides of the connecting block, and the upper ends of the two springs are connected with a fixed plate between the two L-shaped clamping plates.

8. The motorized spool hoist of claim 1, wherein: Hoisting wheels are mounted at the top of the four corners of the lifting appliance frame.

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