Coil loading and unloading trolley
By adopting a convex and concave arc block structure in the unloading trolley, the lateral force of the lifting cylinder is reduced, the problem of damage to the lifting mechanism caused by the deviation of the strip's center of gravity is solved, and the stability, reliability and motion accuracy of the trolley are improved.
Patent Information
- Application Number
- CN202520048447.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-09
AI Technical Summary
In metal strip rolling equipment, when the center of gravity of the strip deviates from the support center of the lifting mechanism during the unloading process of the loading and unloading trolley, the lifting mechanism is subjected to lateral force, which can easily cause damage and affect the stability and reliability of the trolley.
A loading and unloading trolley was designed, which adopts a convex arc block and a concave arc block structure. The convex arc surface of the convex arc block is located below the concave arc surface of the concave arc block, leaving a degree of freedom to reduce the lateral force on the lifting cylinder. The stable movement of the trolley is achieved through gears and racks.
It effectively reduces the lateral force on the lifting cylinder, avoids damage to the lifting cylinder, extends its service life, improves the running stability and reliability of the trolley, and also improves the movement accuracy of the trolley.
Smart Images
Figure CN223789234U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of metal rolling auxiliary devices, and more specifically, to a coil loading and unloading trolley. Background Technology
[0002] In metal sheet and strip rolling mills, loading and unloading trolleys are commonly used to move strip from the storage location to the mill for loading, or to unload the rolled strip from the mill and move it to the storage location.
[0003] Because the strip loading, unloading, and storage locations on the rolling mill need to be matched with different horizontal heights, the unloading trolley is usually equipped with a lifting mechanism to adjust the height of the supporting strip. However, during the loading and unloading process, there are periods when the center of gravity of the strip is not on the support center of the lifting mechanism, such as when the strip is first put into the trolley but has not yet been placed in place, or when the strip rolls off the trolley. During these periods, the center of gravity of the strip deviates from the support center of the lifting mechanism. The pressure of the strip on the trolley causes the lifting mechanism to be subjected to lateral forces, which can easily damage the lifting mechanism and is not conducive to the stable and reliable operation of the trolley. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings and deficiencies in the existing technology and provide a coil loading and unloading trolley; the trolley can realize the loading, unloading and movement of strip material, effectively reduce the lateral force on the lifting cylinder, avoid damage to the lifting cylinder, extend the service life of the lifting cylinder, and improve the stability and reliability of operation.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a loading and unloading trolley, comprising a trolley body and a lifting pallet; the trolley body is equipped with a traveling mechanism; the lifting pallet is mounted on the trolley body via the lifting mechanism to achieve lifting and lowering, and is guided by a guide rod; the lifting mechanism includes a lifting cylinder, a convex arc block, a concave arc block, and a pressing positioning component; the convex arc block is positioned at the top of the telescopic rod of the lifting cylinder; the pressing positioning component presses the convex arc block and the concave arc block onto the bottom surface of the lifting pallet; the convex arc surface of the convex arc block is positioned below the concave arc surface of the concave arc block to support the lifting pallet via the telescopic rod of the lifting cylinder; a degree of freedom is allowed between the convex arc surface of the convex arc block and the concave arc surface of the concave arc block.
[0006] In this utility model trolley, the support of the lifting pallet by the telescopic rod of the lifting cylinder is achieved by the convex surface of the convex arc block being positioned below the concave arc surface of the concave arc block. A degree of freedom is allowed between the convex and concave arc surfaces, ensuring that the convex arc surface, except for the midpoint, has a gap with the concave arc surface. This makes the center of the convex arc surface of the convex arc block the main stress-bearing position, effectively reducing the lateral force on the lifting cylinder, preventing damage to the lifting cylinder, extending its service life, and improving the stability and reliability of the trolley's operation.
[0007] Preferably, the convex surface of the convex arc block refers to a spherical cap surface one obtained from a sphere with radius R1; the concave surface of the concave arc block refers to a spherical cap surface two obtained from a sphere with radius R2; the centers of the spheres of both spheres are located on the central axis of the telescopic rod of the lifting cylinder; radius R1 < radius R2, so that there is a degree of freedom between the convex surface of the convex arc block and the concave surface of the concave arc block. This structure allows the convex surface to have a gap with the concave surface in all areas except the midpoint, and the gap is larger closer to the edge.
[0008] Preferably, the cylinder of the lifting cylinder is disposed on the vehicle body; the convex arc block is disposed at the top of the telescopic rod of the lifting cylinder by means of a thread.
[0009] Preferably, the pressing and positioning component has an upward-opening cavity; the bottom wall of the cavity has a through hole; the concave arc block is disposed on the lower bottom surface of the lifting tray, and the concave arc surface of the concave arc block faces downward; the convex arc block is positioned below the concave arc surface of the concave arc block; the pressing and positioning component simultaneously covers the concave arc block and the convex arc block in the cavity, and the cavity wall of the cavity realizes the positioning of the concave arc block and the convex arc block; the top end of the telescopic rod of the lifting cylinder passes through the through hole and connects to the convex arc block.
[0010] Preferably, the outer contours of the concave and convex arc blocks are circular; the cavity of the pressing positioning member is a cylindrical cavity; the radius of the cylindrical cavity matches the radius of the outer contours of the concave and convex arc blocks. This structure can effectively position the concave and convex arc blocks.
[0011] Preferably, it also includes a tilting tray; the tilting tray is located above the lifting tray, one end of the tilting tray is hinged to the lifting tray, and the other end of the tilting tray is connected to the lifting tray through a tilting mechanism to realize the tilting and resetting of the tilting tray.
[0012] Preferably, the tilting mechanism refers to a tilting cylinder; the cylinder barrel of the tilting cylinder is oscillatingly mounted on the lifting tray; the top end of the telescopic rod of the tilting cylinder is hinged to the tilting tray.
[0013] Preferably, the top end of the telescopic rod of the tilting cylinder is connected to the tilting tray via a pin.
[0014] Preferably, the walking mechanism includes: a drive shaft, a driven shaft, a gear, a rack, a motor, and several wheels; the drive shaft and the driven shaft are respectively disposed in the vehicle body; each wheel is connected to the drive shaft or the driven shaft respectively; the drive shaft is also connected to the gear; the gear is connected to the motor; and the gear meshes with the rack.
[0015] This invention utilizes gears and racks to drive the trolley; when the gears stop rotating, the gears and the trolley body simultaneously engage with the rack, which can brake and stop the movement, thereby effectively preventing the trolley from slipping and improving the trolley's motion accuracy.
[0016] Preferably, the wheels are connected to the drive shaft, the wheels to the driven shaft, and the drive shaft to the gear via key connections.
[0017] The working principle of this utility model trolley is as follows: the traveling mechanism moves between the unloading position and the coil storage position on the rolling mill; when coil unloading is required, the traveling mechanism moves the trolley to the unloading position on the rolling mill, and the lifting mechanism lifts the lifting pallet together with the tilting pallet until the tilting pallet supports the coil on the rolling mill. The traveling mechanism then moves the trolley away from the unloading position on the rolling mill and unloads the coil from the rolling mill; after that, it moves to the coil storage position, and the lifting mechanism adjusts the lifting height so that the height of the tilting pallet matches the height of the coil storage position; the tilting mechanism tilts the tilting pallet so that the coil rolls to the coil storage position; after that, the tilting mechanism and the lifting mechanism reset. When coil loading is required, the lifting mechanism adjusts the lifting height to match the height of the tilting pallet with the height of the coil storage position, and pushes the coil onto the tilting pallet; then the traveling mechanism moves the trolley to the unloading position on the rolling mill, the lifting mechanism adjusts the lifting height to match the height of the coil on the tilting pallet with the height of the coil to be placed on the rolling mill, and then the coil is loaded onto the rolling mill; the lifting mechanism then resets.
[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:
[0019] 1. The trolley of this utility model can realize the loading, unloading and movement of strip material; the support of the lifting pallet by the telescopic rod of the lifting cylinder is achieved by the convex arc surface of the convex arc block being set below the concave arc surface of the concave arc block. There is a degree of freedom between the convex arc surface of the convex arc block and the concave arc surface of the concave arc block, so that the convex arc surface, except for the midpoint, leaves a gap with the concave arc surface. This makes the center of the convex arc surface of the convex arc block the main force position, effectively reducing the lateral force on the lifting cylinder, avoiding damage to the lifting cylinder, extending the service life of the lifting cylinder, and improving the stability and reliability of the trolley operation.
[0020] 2. The trolley of this utility model uses gears and racks to drive the trolley to move; when the gears stop rotating, the gears and the trolley body are simultaneously locked on the rack, which can brake and stop the movement, thereby effectively preventing the trolley from slipping and improving the trolley's motion accuracy. Attached Figure Description
[0021] Figure 1 This is one of the structural schematic diagrams of the loading and unloading trolley of this utility model;
[0022] Figure 2 This is a schematic diagram of the structure of the unloading trolley of this utility model in the raised state of the lifting pallet;
[0023] Figure 3 This is the second structural schematic diagram of the loading and unloading trolley of this utility model;
[0024] Figure 4 yes Figure 3 Enlarged view of section A in the middle;
[0025] Among them, 1 is the track, 2 is the car body, 3 is the driven shaft, 4 is the lifting pallet, 5 is the tilting pallet, 6 is the guide rod, 7 is the drive shaft, 8 is the gear, 9 is the wheel, 10 is the rack, 11 is the lifting cylinder, 12 is the convex arc block, 13 is the concave arc block, 14 is the pressing positioning component, and 15 is the tilting cylinder. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0027] Example
[0028] like Figures 1 to 4 As shown, this embodiment of a loading and unloading trolley includes a trolley body 2, a lifting pallet 4, and a tilting pallet 5.
[0029] The car body is equipped with a traveling mechanism, which includes a drive shaft 7, a driven shaft 3, a gear 8, a rack 10, a motor, and several wheels 9. The drive shaft 7 and the driven shaft 3 are respectively disposed in the car body 2. Each wheel 8 is connected to either the drive shaft 7 or the driven shaft 3. The drive shaft 7 is also connected to the gear 8. The gear 8 is connected to the motor. The gear 8 meshes with the rack 10. Preferably, the wheels 9 are connected to the drive shaft 7, the wheels 9 are connected to the driven shaft 3, and the drive shaft 7 is connected to the gear 8 via keys. The traveling mechanism enables movement between the unloading position and the coil storage position on the rolling mill.
[0030] The lifting pallet 4 is mounted on the vehicle body 2 via a lifting mechanism to achieve lifting, and is guided by the guide rod 6.
[0031] The tilting tray 5 is located above the lifting tray 4. One end of the tilting tray 5 is hinged to the lifting tray 4, and the other end of the tilting tray 5 is connected to the lifting tray 4 through a tilting mechanism to achieve tilting and resetting of the tilting tray 5. The tilting mechanism is preferably a tilting cylinder 15; the cylinder of the tilting cylinder 15 is oscillatingly mounted on the lifting tray 4; the top end of the telescopic rod of the tilting cylinder 15 is hinged to the tilting tray through a pin.
[0032] The working principle of this utility model trolley is as follows: the traveling mechanism moves between the unloading position on the rolling mill and the coil storage position; when coil unloading is required, the traveling mechanism moves the trolley to the unloading position on the rolling mill, and the lifting mechanism lifts the lifting pallet 4 together with the tilting pallet 5 until the tilting pallet 5 supports the coil on the rolling mill. The traveling mechanism then moves the trolley away from the unloading position on the rolling mill and unloads the coil from the rolling mill; after that, it moves to the coil storage position, and the lifting mechanism adjusts the lifting height so that the height of the tilting pallet 5 matches the height of the coil storage position; the tilting mechanism tilts the tilting pallet 5 so that the coil rolls to the coil storage position; after that, the tilting mechanism and the lifting mechanism reset. When coil loading is required, the lifting mechanism adjusts the lifting height to match the height of the tilting pallet 5 with the height of the coil storage position, and pushes the coil onto the tilting pallet 5; then the traveling mechanism moves the trolley to the unloading position on the rolling mill, the lifting mechanism adjusts the lifting height to match the height of the coil on the tilting pallet 5 with the height of the coil to be placed on the rolling mill, and then the coil is loaded onto the rolling mill; the lifting mechanism resets.
[0033] In this utility model, the lifting mechanism includes a lifting cylinder 11, a convex arc block 12, a concave arc block 13, and a pressing and positioning component 14; the convex arc block 12 is disposed at the top of the telescopic rod of the lifting cylinder 11; the pressing and positioning component 14 presses the convex arc block 12 and the concave arc block 13 onto the lower bottom surface of the lifting tray 4; the convex arc surface of the convex arc block 12 is positioned below the concave arc surface of the concave arc block 13 to achieve support of the telescopic rod of the lifting cylinder 11 on the lifting tray 4; a degree of freedom is left between the convex arc surface of the convex arc block 12 and the concave arc surface of the concave arc block 13.
[0034] Specifically, the cylinder of the lifting cylinder 11 is mounted on the vehicle body 2; the convex arc block 12 is threaded onto the top of the telescopic rod of the lifting cylinder. The convex arc surface of the convex arc block 12 refers to the first spherical cap surface obtained from a spherical surface with radius R1; the concave arc surface of the concave arc block 13 refers to the second spherical cap surface obtained from a spherical surface with radius R2. The centers of the first and second spherical surfaces are both located on the central axis of the telescopic rod of the lifting cylinder 11; radius R1 < radius R2, so that there is a degree of freedom between the convex arc surface of the convex arc block 12 and the concave arc surface of the concave arc block 13. This structure allows the convex arc surface to have a gap with the concave arc surface in all areas except the midpoint, and the gap is larger closer to the edge.
[0035] The pressing and positioning component 14 has an upward-opening cavity; the bottom wall of the cavity has a through hole; the concave arc block 13 is set on the lower bottom surface of the lifting tray 4, and the concave arc surface of the concave arc block 13 faces downward; the convex arc block 12 is positioned below the concave arc surface of the concave arc block 13; the pressing and positioning component 14 covers the concave arc block 13 and the convex arc block 12 in the cavity at the same time, and the cavity wall realizes the positioning of the concave arc block 13 and the convex arc block 12; the top end of the telescopic rod of the lifting cylinder 11 passes through the through hole and connects to the convex arc block 12.
[0036] The concave arc block 13 and the convex arc block 12 have circular outer contours in their cross sections; the cavity of the pressing positioning member 14 is a cylindrical cavity; the radius of the cylindrical cavity matches the radius of the outer contours of the concave and convex arc blocks in their cross sections. This structure can effectively position the concave and convex arc blocks.
[0037] In this utility model trolley, the support of the lifting cylinder 11 telescopic rod for the lifting tray is achieved by the convex arc surface of the convex arc block 12 being positioned below the concave arc surface of the concave arc block 13. A degree of freedom is maintained between the convex arc surface of the convex arc block 12 and the concave arc surface of the concave arc block 13, ensuring that the convex arc surface 12, except for the midpoint, has a gap with the concave arc surface. This makes the center of the convex arc surface of the convex arc block 12 the main stress-bearing position, effectively reducing the lateral force on the lifting cylinder 11, preventing damage to the lifting cylinder 11, extending the service life of the lifting cylinder, and improving the stability and reliability of the trolley's operation.
[0038] The trolley is driven by gear 8 and rack 10. When gear 8 stops rotating, gear 8 and the trolley body 2 are simultaneously locked onto rack 10, which can brake and stop the movement, thereby effectively preventing the trolley from slipping and improving the trolley's motion accuracy.
[0039] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.
Claims
1. A coil loading / unloading trolley, characterized in that: The system includes a vehicle body and a lifting pallet; the vehicle body is equipped with a traveling mechanism; the lifting pallet is mounted on the vehicle body via a lifting mechanism to achieve lifting and lowering, and is guided by a guide rod; the lifting mechanism includes a lifting cylinder, a convex arc block, a concave arc block, and a pressing positioning component; the convex arc block is located at the top of the telescopic rod of the lifting cylinder. The pressing positioning component presses the convex and concave arc blocks onto the bottom surface of the lifting tray; The convex surface of the convex block is positioned below the concave surface of the concave block to support the lifting pallet with the telescopic rod of the lifting cylinder; there is a degree of freedom between the convex surface of the convex block and the concave surface of the concave block.
2. The unloading trolley according to claim 1, characterized in that: The convex surface of the convex block refers to the first spherical cap surface obtained from a sphere with radius R1; the concave surface of the concave block refers to the second spherical cap surface obtained from a sphere with radius R2; the center of the spheres of both spheres are located on the central axis of the telescopic rod of the lifting cylinder; radius R1 < radius R2, so that there is a degree of freedom between the convex surface of the convex block and the concave surface of the concave block.
3. The unloading trolley according to claim 1, characterized in that: The cylinder of the lifting cylinder is mounted on the vehicle body; the convex arc block is threaded onto the top of the telescopic rod of the lifting cylinder.
4. The unloading trolley according to claim 1, characterized in that: The pressing and positioning component has an upward-opening cavity; the bottom wall of the cavity has a through hole; the concave arc block is set on the lower bottom surface of the lifting tray, and the concave arc surface of the concave arc block faces downward. The convex arc block is positioned below the concave arc surface of the concave arc block; the pressing and positioning component simultaneously covers the concave arc block and the convex arc block in the cavity, and positions the concave arc block and the convex arc block through the cavity wall; the top end of the telescopic rod of the lifting cylinder passes through the through hole and connects to the convex arc block.
5. The unloading trolley according to claim 4, characterized in that: The outer contours of the concave and convex arc blocks are circular; the cavity of the pressing positioning component is a cylindrical cavity; the radius of the cylindrical cavity matches the radius of the outer contours of the concave and convex arc blocks.
6. The unloading trolley according to claim 1, characterized in that: It also includes a tilting tray; the tilting tray is located above the lifting tray, one end of the tilting tray is hinged to the lifting tray, and the other end of the tilting tray is connected to the lifting tray through a tilting mechanism to realize the tilting and resetting of the tilting tray.
7. The unloading trolley according to claim 6, characterized in that: The tilting mechanism refers to a tilting cylinder; the cylinder barrel of the tilting cylinder is oscillatingly mounted on the lifting tray; the top of the telescopic rod of the tilting cylinder is hinged to the tilting tray.
8. The unloading trolley according to claim 7, characterized in that: The top of the telescopic rod of the tilting cylinder is connected to the tilting tray via a pin.
9. The unloading trolley according to any one of claims 1 to 8, characterized in that: The traveling mechanism includes: a drive shaft, a driven shaft, a gear, a rack, a motor, and several wheels; the drive shaft and the driven shaft are respectively disposed in the vehicle body; each wheel is connected to the drive shaft or the driven shaft respectively; the drive shaft is also connected to the gear; the gear is connected to the motor; the gear meshes with the rack.
10. The unloading trolley according to claim 9, characterized in that: The wheels are connected to the drive shaft, the wheels to the driven shaft, and the drive shaft to the gear via key connections.