An adjustable height steel coil handling dolly

Abstract

The utility model relates to steel coil carrying platform truck technical field especially relates to a kind of height-adjustable steel coil carrying platform truck, including mobile platform, limit rail, support plate, fixed block, sliding block and push block etc., support plate is located the top of mobile platform, the right side of the two side walls of support plate and the right side of the two side walls of mobile platform are all connected with limit rail, sliding block is slidably connected on limit rail, the left side of the two side walls of support plate and the left side of the two side walls of mobile platform are all connected with fixed block. By servo motor as power source, driving adjusting screw and the hinge rod structure of cross arrangement cooperation drive support plate lifting, can accurately match the operating height of headstock / caterpillar truck to facilitate steel coil feeding, also can adapt the docking height of storage area or production line to facilitate unloading, without additional adjustment external equipment position, reduce the work stagnation caused by height mismatch, improve transfer linkage efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of steel coil handling trolleys, and in particular to a steel coil handling trolley with adjustable height. Background Technology

[0002] As an important semi-finished and finished product in the steel industry, steel coils often require the use of specialized trolleys for transfer during their production, storage, and transportation. Currently, the most common method for handling steel coils is to rely on forklifts or overhead cranes to lift them onto flatbed trolleys at a fixed height before moving them.

[0003] However, in practical applications, the operating heights of loading and unloading platforms, racking locations, and forklift forks or overhead crane hooks vary across different production lines. Fixed-height handling trolleys cannot adapt to these variations, frequently leading to height mismatches during loading and unloading. To overcome this difficulty, operators often need to use additional padding blocks or repeatedly adjust the lifting equipment to find the appropriate loading and unloading angle. This process is not only cumbersome and inefficient but also poses certain safety risks. Even some devices with simple lifting functions are mostly designed to achieve basic loading and unloading functions, rather than providing precise height adaptation for different destination interfaces during transportation.

[0004] Therefore, existing steel coil handling equipment suffers from insufficient flexibility, low work efficiency, and safety hazards. There is an urgent need for a specialized steel coil handling trolley that can autonomously and flexibly adjust the height of the bearing surface to adapt to different loading and unloading operation requirements. Utility Model Content

[0005] To overcome the shortcomings mentioned in the background art, this utility model provides a steel coil handling trolley with adjustable height.

[0006] The technical solution of this utility model is as follows: an adjustable-height steel coil handling trolley, comprising a moving platform, limiting rails, a support plate, a fixed block, a sliding block, a pushing block, hinge rods, a servo motor, an adjusting screw, a support base, a flip plate, a lifting assembly, a limiting plate, a controller, and a rotating assembly. The support plate is located directly above the moving platform. Limiting rails are connected to the right sides of both side walls of the support plate and the right sides of both side walls of the moving platform. Sliding blocks are slidably connected to the limiting rails. Fixed blocks are connected to the left sides of both side walls of the support plate and the left sides of both side walls of the moving platform. A total of four hinge rods are provided, with each pair of hinge rods forming a group. The two hinge rods in each group are arranged in a cross pattern, and the intersection point is rotatably connected through a rotating shaft. The upper end of the hinge rod is rotatably connected to the fixed block and the sliding block on the side of the support plate. The lower end is rotatably connected to the fixed block and sliding block on the side of the moving platform. A servo motor is installed on the front right side of the moving platform. An adjusting screw is connected to the output shaft of the servo motor. A push block is threaded onto the adjusting screw. The push block is fixedly connected to the sliding block below. Support seats are symmetrically installed on both sides of the top of the support plate. A rotating shaft is rotatably connected between the two front support seats and the two rear support seats. A flip plate is fixedly connected to the rotating shaft. A rotating assembly is provided on the support plate. Four sets of mounting slots are opened on the support plate. Each set of mounting slots contains two slots. A limit plate is slidably connected in each mounting slot. Every two limit plates form a set and are distributed in opposite directions. A lifting assembly is provided at the bottom of the support plate. A controller is installed on the right side wall of the support plate. The servo motor is electrically connected to the controller.

[0007] In one embodiment, the limiting rail is made of bearing steel, and its inner surface in contact with the sliding block is hardened.

[0008] In one embodiment, the inclined angle of the opposite surface of the limiting plate is 15°-30°.

[0009] In one embodiment, a rubber buffer layer is fixedly attached to the side of the flap facing the steel coil.

[0010] In one embodiment, the rotating assembly includes a worm gear, a drive motor, and a worm. The drive motor is installed on both sides of the middle part of the support plate. The worm is coaxially connected to the output shaft of the drive motor and passes through the interior of the support plate. A notch is opened in the middle of the bottom of the flap. A worm gear is fixedly connected to the rotating shaft of the support base at the position of the notch. The worm gear and the worm on the corresponding side form a meshing engagement.

[0011] In one embodiment, the lifting assembly includes a connecting plate, a drive motor, a lead screw, and a lifting plate. The connecting plate is fixedly connected to the bottom of the support plate, and four drive motors are installed at intervals on the connecting plate. A lead screw is connected to the output shaft of the drive motor. A lifting plate is fixedly connected between the bottoms of the two limit plates in each group. The lifting plate is threadedly connected to the lead screw at the corresponding position. The drive motor is electrically connected to the controller.

[0012] Beneficial effects: 1. By using a servo motor as a power source, the adjustment screw and the cross-set hinged rod structure are driven to raise and lower the support plate. It can accurately match the working height of the overhead crane / forklift to facilitate the loading of steel coils. It can also adapt to the docking height of the storage area or production line to facilitate unloading. There is no need to adjust the position of external equipment, reducing the operation stoppage caused by height mismatch and improving the efficiency of transfer connection.

[0013] 2. The worm gear drive drives the flap to rotate, which can reliably switch between vertical limiting and horizontal flat states. When transporting, the flap is raised to effectively prevent the steel coil from moving back and forth and ensure safe movement. When unloading, the flap is flat, which completely makes room and will not hinder the steel coil from being lifted or rolled down, thus achieving a balance between limiting function and convenient loading and unloading.

[0014] 3. The drive motor controls the synchronous lifting and lowering of the pairs of limit plates via a lead screw. When lowering, the plates are flush with the platform, facilitating the placement and fine-tuning of the steel coils. When rising, the inclined surfaces of the plates contact the outer periphery of the steel coils, automatically guiding and correcting their position so that they are centered on each set of limit plates. This achieves efficient and precise centering and clamping, ensuring stability when multiple steel coils are transported simultaneously. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the moving platform, limiting rail, and support plate of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the components of this utility model, including the fixing block, servo motor, and hinge rod.

[0018] Figure 4 This is a three-dimensional structural diagram of the support base, flap, and worm gear components of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the components of this utility model, including the flap, worm gear, and drive motor.

[0020] Figure 6 This is a three-dimensional sectional view of the drive motor, controller, and lifting plate components of this utility model.

[0021] Figure 7 This is a three-dimensional sectional view of the limiting plate, lifting plate, and lead screw components of this utility model.

[0022] The components in the diagram are labeled as follows: 1-Moving platform, 2-Limit rail, 3-Support plate, 4-Fixing block, 401-Sliding block, 402-Push block, 5-Hinge rod, 6-Servo motor, 601-Adjusting screw, 7-Support base, 8-Flip plate, 9-Worm gear, 10-Transmission motor, 11-Worm, 12-Limit plate, 13-Connecting plate, 14-Drive motor, 15-Screw screw, 16-Lifting plate, 17-Controller. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0024] Example: A height-adjustable steel coil handling trolley, such as Figures 1-7As shown, the device includes a moving platform 1, a limiting rail 2, a support plate 3, a fixed block 4, a sliding block 401, a pushing block 402, a hinge rod 5, a servo motor 6, an adjusting screw 601, a support base 7, a flip plate 8, a lifting assembly, a limiting plate 12, a controller 17, and a rotating assembly. The moving platform 1 serves as the moving assembly of the device. The support plate 3 is located directly above the moving platform 1. Limiting rails 2 are fixedly connected to the right sides of the front and rear side walls of the support plate 3 and the right sides of the front and rear side walls of the moving platform 1. Sliding blocks 401 are slidably connected to the limiting rails 2. The limiting rails 2 are made of bearing steel, and their inner surfaces in contact with the sliding blocks 401 are hardened to significantly improve the wear resistance of the limiting rails 2 and extend their service life. The left sides of the front and rear side walls of the support plate 3 and the front and rear side walls of the moving platform 1 are also fixedly connected to the limiting rails 2. Fixed blocks 4 are fixedly connected to the left side of the wall. Fixed blocks 4 and sliding blocks 401 at the same height are symmetrically distributed. There are four hinge rods 5 in total. Two hinge rods 5 form a group. The two hinge rods 5 in each group are arranged in a cross shape. The intersection point is connected by a rotating shaft. The two groups of hinge rods 5 correspond to the fixed blocks 4 and sliding blocks 401 on the front and rear sides, respectively. The upper end of the hinge rod 5 is rotatably connected to the fixed blocks 4 and sliding blocks 401 on the side of the support plate 3, and the lower end is rotatably connected to the fixed blocks 4 and sliding blocks 401 on the side of the moving platform 1. A servo motor 6 is installed on the front right side of the moving platform 1. An adjusting screw 601 is connected to the output shaft of the servo motor 6. A push block 402 is threaded onto the adjusting screw 601. The push block 402 is connected to the lower limit rail 2. The sliding block 401 is fixedly connected. Support seats 7 are symmetrically installed on the front and rear sides of the top of the support plate 3 along the left and right directions. Rotary shafts are rotatably connected between the two front support seats 7 and between the two rear support seats 7. Flip plates 8 are fixedly connected to the rotating shafts. The flip plates 8 are located at the front and rear sides of the top of the support plate 3 to limit the front and rear directions of the steel coil and prevent the steel coil from shifting in the front and rear directions. The support plate 3 is provided with a rotating assembly to drive the flip plates 8 to open and close. A rubber buffer layer is fixedly attached to the side of the flip plate 8 facing the steel coil. The rubber buffer layer can avoid rigid collision between the flip plate 8 and the steel coil. Especially when the moving platform 1 starts, stops or turns, it can absorb the impact kinetic energy of the steel coil, reduce the impact damage to the surface of the steel coil, and reduce collision noise. The upper edge of the support plate 3 is horizontal. Four sets of mounting slots are provided in the direction, each set containing two slots. Limiting plates 12 are slidably connected within each slot. Each pair of limiting plates 12 forms a group and is distributed facing each other. The facing surfaces of the limiting plates 12 are machined into a beveled structure. Each set of limiting plates 12 can center and limit the movement of a steel coil. The bevel angle of the facing surfaces of the limiting plates 12 is 15°-30°. This angle range allows for smooth correction of the steel coil's position during centering, preventing scratches on the coil surface due to excessively steep angles, while also preventing insufficient centering force and coil misalignment due to excessively gentle angles. This balances centering accuracy and coil protection. A lifting assembly is provided at the bottom of the support plate 3 to control the lifting of the limiting plates 12. A controller 17 is bolted to the right side wall of the support plate 3.Servo motor 6 is electrically connected to controller 17.

[0025] like Figures 4-5 As shown, the rotating assembly includes a worm gear 9, a drive motor 10, and a worm 11. The drive motor 10 is bolted to both the front and rear side walls of the middle of the support plate 3. The worm 11 is coaxially connected to the output shaft of the drive motor 10. The worm 11 passes through the interior of the support plate 3. A notch is opened in the middle of the bottom of the flap 8. The worm gear 9 is fixedly connected to the rotating shaft of the support base 7 at the position of the notch. The worm gear 9 and the worm 11 on the corresponding side are meshed. The drive motor 10 drives the worm 11 to rotate, which can drive the worm gear 9 and the rotating shaft to rotate synchronously, thereby realizing the opening and closing action of the flap 8. The drive motor 10 is electrically connected to the controller 17.

[0026] like Figures 6-7 As shown, the lifting assembly includes a connecting plate 13, a drive motor 14, a lead screw 15, and a lifting plate 16. The bottom of the support plate 3 is fixedly connected to the connecting plate 13 by screws. Four drive motors 14 are installed on the connecting plate 13 at intervals by bolts. The output shaft of the drive motor 14 is connected to the lead screw 15. The bottom of the two limit plates 12 in each group is fixedly connected to the lifting plate 16. The lifting plate 16 is threadedly connected to the lead screw 15 at the corresponding position. The drive motor 14 is electrically connected to the controller 17.

[0027] This device is designed to operate on a pre-laid fixed track. During operation, the height of the support plate 3 is first adjusted to match the working height of the overhead crane or forklift. The servo motor 6 is then started via the control controller 17, controlling its output shaft to rotate forward or backward, causing the adjusting screw 601 to rotate synchronously. The adjusting screw 601 then moves the pushing block 403 to the left, which in turn moves the sliding block 4 on the lower limit rail 2 to the left. This action drives the intersecting hinge rods 5 to rotate and unfold. The upper and lower sliding blocks 4 move along the limit rail 2 to the left, approaching the fixed block 401. The rotation of the hinge rods 5 then drives the support plate 3 to rotate. The support plate 3 and the components mounted on it move upward synchronously until the support plate 3 is adjusted to the target height that matches the working height of the overhead crane or forklift. This height facilitates the transfer of steel coils onto the support plate 3. Similarly, if it is necessary to lower the height of the support plate 3, the adjusting screw 601 can be controlled to rotate in the opposite direction, driving the push block 403 to move to the right, which in turn drives the lower sliding block 4 to move to the right along the lower limit rail 2, thereby driving the hinge rod 5 to rotate and fold in the opposite direction, so as to drive the upper sliding block 4 to move to the right along the upper limit rail 2, and thus move away from the fixed block 4. Finally, the support plate 3 and the components mounted on it move downward synchronously. After the height of the support plate 3 is adjusted, the servo motor 5 is turned off.

[0028] Subsequently, the controller 17 starts the drive motor 10. The output shaft of the drive motor 10 drives the worm gear 11 to rotate synchronously. The worm gear 11 drives the rotating shaft on the support seat 7 to rotate through the meshing with the worm wheel 9. The rotating shaft then drives the flip plate 8 to rotate to a horizontal state, so as to avoid the flip plate 8 interfering with the hoisting of the steel coil. Next, the controller 17 starts the drive motor 14. The output shaft of the drive motor 14 drives the lead screw 15 to rotate synchronously. Since the lifting plate 16 is threadedly engaged with the lead screw 15, when the lead screw 15 rotates, it drives the lifting plate 16 and the fixed limit plate 12 on it to move downward synchronously until the top surface of the limit plate 12 is at the same level as the top surface of the support plate 3. This makes it easy for the steel coil to roll and adjust its position on the support plate 3. Then, the steel coil is hoisted to the top of the support plate 3 by an overhead crane or forklift and aligned with the preset area between each set of limit plates 12.

[0029] Once the position of the steel coil is determined, the operation controller 17 starts the drive motor 14 of the corresponding area to run in reverse. The output shaft of the drive motor 14 drives the lead screw 15 to rotate in reverse, thereby driving the lifting plate 16 and the two corresponding limit plates 12 to move upward synchronously. The inclined surface of the limit plate 12 contacts the outer circumference of the steel coil. The position of the steel coil is corrected by the guiding action of the inclined surface, and finally the centering limit of the steel coil is achieved. In the above manner, the remaining steel coils are fixed one by one to the corresponding preset area on the support plate 3. This device can achieve the synchronous fixing of four steel coils at a time. After all the steel coils are installed and fixed, the control drive motor 10 is turned in reverse. The output shaft of the drive motor 10 drives the worm gear 11 to rotate in reverse. The worm gear 11 drives the rotating shaft and the flip plate 8 to rotate in reverse and unfold through the meshing cooperation with the worm wheel 9 until the flip plate 8 is in a vertical state. The vertical flip plate 8 forms a rigid limit on the front and rear position of the steel coil, effectively improving the stability of the position of the steel coil during the movement of the moving table 1.

[0030] When the mobile station 1 moves to the corresponding production line or storage area, the controller 17 is operated again to start the servo motor 6 to adjust the height of the support plate 3 so that the height of the support plate 3 is adapted to the receiving height of the storage area or the docking height of the production line, so that the steel coil can be sent into the storage or docked with the production line. Then, the drive motor 10 is started to rotate the flip plate 8 to a horizontal state to avoid the flip plate 8 interfering with the unloading of the steel coil. Finally, the steel coil is unloaded from the support plate 3 by an overhead crane or forklift to complete the entire operation process.

Claims

1. A height-adjustable steel coil handling trolley, characterized in that: The system includes a moving platform (1), a limiting rail (2), a support plate (3), a fixed block (4), a sliding block (401), a pushing block (402), a hinge rod (5), a servo motor (6), an adjusting screw (601), a support base (7), a flip plate (8), a lifting assembly, a limiting plate (12), a controller (17), and a rotating assembly. The support plate (3) is located directly above the moving platform (1). Limiting rails are connected to the right sides of both sides of the support plate (3) and the right sides of both sides of the moving platform (1). 2) Sliding blocks (401) are slidably connected to the limiting rail (2). Fixing blocks (4) are connected to the left side of both sides of the support plate (3) and the left side of both sides of the moving platform (1). There are four hinge rods (5). Each pair of hinge rods (5) is a group. The two hinge rods (5) in each group are arranged in a cross shape. The intersection point is connected to the rotating shaft. The upper end of the hinge rod (5) is rotatably connected to the fixing block (4) and the sliding block (401) on the side of the support plate (3). The lower end is connected to the moving platform (1). The fixed block (4) on the side of the moving platform (1) is rotatably connected to the sliding block (401). A servo motor (6) is installed on the right side of the front of the moving platform (1). An adjusting screw (601) is connected to the output shaft of the servo motor (6). A push block (402) is threaded onto the adjusting screw (601). The push block (402) is fixedly connected to the sliding block (401) below. Support seats (7) are symmetrically installed on both sides of the top of the support plate (3). The two support seats (7) on the front side and the two support seats (7) on the rear side are connected together. A rotating shaft is rotatably connected between the support bases (7), and a flap (8) is fixedly connected to the rotating shaft. A rotating component is provided on the support plate (3). Four sets of mounting slots are provided on the support plate (3). Each set of mounting slots contains two slots. A limit plate (12) is slidably connected in each mounting slot. Every two limit plates (12) form a set and are distributed in opposite directions. A lifting component is provided at the bottom of the support plate (3). A controller (17) is installed on the right side wall of the support plate (3). The servo motor (6) is electrically connected to the controller (17).

2. The adjustable-height steel coil handling trolley according to claim 1, characterized in that: The limiting rail (2) is made of bearing steel, and its inner surface in contact with the sliding block (401) is hardened.

3. A height-adjustable steel coil handling trolley according to claim 2, characterized in that: The inclined angle of the opposite side of the limiting plate (12) is 15°-30°.

4. A height-adjustable steel coil handling trolley according to claim 3, characterized in that: The side of the flip plate (8) facing the steel coil is fixedly fitted with a rubber buffer layer.

5. A height-adjustable steel coil handling trolley according to claim 4, characterized in that: The rotating assembly includes a worm wheel (9), a drive motor (10), and a worm (11). The drive motor (10) is installed on both sides of the middle part of the support plate (3). The worm (11) is coaxially connected to the output shaft of the drive motor (10). The worm (11) passes through the interior of the support plate (3). A notch is opened in the middle of the bottom of the flap (8). The worm wheel (9) is fixedly connected to the rotating shaft of the support base (7) at the position of the notch. The worm wheel (9) and the worm (11) on the corresponding side form a meshing engagement.

6. A height-adjustable steel coil handling trolley according to claim 5, characterized in that: The lifting assembly includes a connecting plate (13), a drive motor (14), a lead screw (15), and a lifting plate (16). The bottom of the support plate (3) is fixedly connected to the connecting plate (13). Four drive motors (14) are installed at intervals on the connecting plate (13). The output shaft of the drive motor (14) is connected to the lead screw (15). The bottom of the two limit plates (12) in each group is fixedly connected to the lifting plate (16). The lifting plate (16) is threadedly connected to the lead screw (15) at the corresponding position. The drive motor (14) is electrically connected to the controller (17).

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