Material roll lifting device

Abstract

The utility model relates to material roll lifting device, including frame, be equipped with the lifting piece of bearing material roll and the linkage of floating device on the frame, and floating device can drive lifting piece to move according to material roll outer diameter change. Floating device contains mounting bracket, sliding structure and drive source assembly, and sliding structure is cooperated through gyro wheel group and slide rail, and drive source assembly is driven with hydraulic cylinder and open chain transmission, realizes the accurate linear movement of lifting piece. The device can dynamically share the load of winding shaft, prevent bending deformation, improve winding neatness, reduce manual intervention, improve automation efficiency, and sliding structure reduces friction, enhances moving stability, prolongs equipment life.

Description

Technical Field

[0001] This utility model specifically relates to a material roller lifting device. Background Technology

[0002] In the field of printing and packaging machinery, laminating and winding machines are key equipment for realizing the continuous production of laminated paper (a material that combines paper base with PE plastic, widely used in paper cups, food packaging boxes, etc.). Its core function is to stably wind the laminated paper roll into a regular roll. In existing technologies, coating machines typically rely on air shafts as the core winding component, using hydraulic cylinders to drive the winding and unwinding of the roll material. For example, document CN201907874U discloses a coating machine winding device that can achieve basic winding of the coated paper roll after lamination. However, in actual production applications, the following defects still exist: the load of the roll material's own weight and winding tension during the winding process is entirely borne by the air shaft. As the winding diameter increases, the weight of the coated paper continues to accumulate, and the air shaft needs to withstand the combined effects of radial pressure and torque. Long-term heavy load can easily lead to bending deformation of the air shaft, which will directly cause uneven winding of the roll material, such as edge misalignment and "tower" defects, seriously affecting the processing accuracy of subsequent slitting, cup making and other processes. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model provides a material roller lifting device to solve the problem of uneven winding caused by easy bending and deformation of the winding shaft.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a material roller lifting device, comprising a frame, wherein at least one set of lifting members distributed below the take-up shaft and supporting the material roll on the take-up shaft, and a floating device linked with the lifting members, wherein the floating device can drive at least one set of lifting members to move relative to the take-up shaft according to the change in the outer diameter of the material roll on the take-up shaft.

[0005] The beneficial effects of this invention are as follows: By setting up a support component and a floating device, the device can dynamically distribute the radial pressure and torque load borne by the winding shaft, thereby effectively preventing the bending deformation of the air shaft caused by long-term heavy load, improving winding neatness, avoiding edge misalignment or "tower-shaped" defects, and thus ensuring the processing accuracy of subsequent processes such as slitting and cup making. Furthermore, the adaptive adjustment function of the floating device reduces the need for manual intervention, improving the automation level and production efficiency of the equipment. As a preferred embodiment, the floating device may include a movable support frame connected to the machine frame via a linear guide rail and equipped with a position sensor to monitor changes in the outer diameter of the material roll in real time. When the diameter of the material roll increases, the sensor signal triggers an electric push rod to drive the support frame to move downward along the guide rail, thereby keeping the support component in constant contact with the outer surface of the material roll and distributing the load. As another preferred embodiment, the floating device uses a hydraulic cylinder as the driving element. The piston rod of the hydraulic cylinder is connected to the support component, and the hydraulic control system automatically adjusts the piston rod stroke according to a preset pressure threshold, allowing the support component to move smoothly downward as the weight of the material roll increases, achieving continuous and stable support.

[0006] Furthermore, the floating device includes a mounting frame for mounting the lifting component and a sliding structure linked to the mounting frame. The sliding structure is slidably fitted with a slide rail, which is fixed to the frame. The mounting frame or the sliding structure is linked to a drive source assembly, which drives the lifting component to move along the slide rail through the mounting frame or the sliding structure.

[0007] The beneficial effects of this technical solution are as follows: Through the synergistic action of the mounting frame, sliding structure, and drive source assembly, precise linear movement of the lifting component is achieved. This ensures that the lifting component can adjust its position in a timely manner when the outer diameter of the material roll changes during winding, thereby evenly distributing the load, reducing stress concentration on the winding shaft, and extending the service life of the equipment. The sliding structure adopts a slide rail cooperation method, which improves the stability and accuracy of movement and avoids uneven winding caused by vibration or offset. The integration of the drive source assembly automates the adjustment process and reduces operational complexity. As a preferred approach, the sliding structure can be designed to include a slider and a linear bearing. The slider is fixed to the bottom of the mounting frame, and the linear bearing is nested on the slide rail. When the drive source assembly, such as a servo motor, drives the slider to move along the slide rail through a lead screw, it can precisely control the positional changes of the lifting component. As another preferred approach, the sliding structure adopts a combination of guide rail and ball bearing slider. The guide rail provides high rigidity support, the ball bearing slider reduces frictional resistance, and the drive source assembly uses a hydraulic cylinder to directly push the mounting frame. Rapid response and smooth movement are achieved through air pressure regulation, adapting to high-speed winding conditions.

[0008] Furthermore, the sliding structure includes two rows of rollers symmetrically distributed on both sides of the slide rail. Each row of rollers includes at least one roller that rolls with the slide rail. A first rotating shaft is rotatably connected to the center of each roller. The mounting bracket is provided with a first mounting hole corresponding to each first rotating shaft. A stop screw is connected to the end of the first rotating shaft through a machined internal thread hole. Wear-resistant pads are sleeved on the outer periphery of the first rotating shaft, and the wear-resistant pads are distributed between the roller and the mounting bracket.

[0009] The beneficial effects of this technical solution are as follows: the symmetrical distribution and rolling fit design of the roller assembly significantly reduce sliding friction, improving the smoothness and durability of the floating device's movement. The fixing method of the first shaft and the stop screw ensures stable installation of the rollers, preventing loosening or displacement under load, thereby ensuring the accuracy of the lifting component's position. The use of wear-resistant shims further reduces wear, extends the service life of critical components, and is suitable for high-load continuous production environments. As a preferred method, the roller assembly can be designed so that each roller is connected to the first shaft via a bearing. The inner ring of the bearing is fixed to the first shaft, and the outer ring mates with the inner hole of the roller. When the sliding structure moves, the rollers roll on the slide rail, reducing friction and distributing the load. The first shaft is fixed to the first mounting hole of the mounting bracket via a flat key. The stop screw applies preload to ensure the axial positioning of the first shaft. Wear-resistant shims are installed on the side of the rollers to absorb impact and reduce vibration transmission.

[0010] Furthermore, the drive source assembly includes an open-loop chain with one end linked to the mounting bracket, and a positioning block linked to the other end of the open-loop chain. The positioning block is fixed to the frame. The open-loop chain is linked to a main drive sprocket. The main drive sprocket is linked to a hydraulic cylinder distributed between the positioning block and the mounting bracket. The body of the hydraulic cylinder is fixed to the frame. The frame is also equipped with several sets of transmission sprockets distributed between the hydraulic cylinder and the mounting bracket and linked to the open-loop chain.

[0011] The beneficial effects of this technical solution are as follows: the open-loop chain and sprocket drive system provides reliable power transmission, enabling long-distance, high-precision position adjustment. The hydraulic cylinder, as the drive source, ensures rapid response and high torque output, adapting to rapid changes in the coil diameter during winding. The positioning block limits the chain's range of motion, preventing overshoot or chain derailment and improving safety. The optimized distribution of the drive sprockets improves the force transmission path, reducing chain wear and noise, and enhancing overall equipment reliability. As a preferred approach, the drive source assembly can be designed as a hydraulic cylinder piston rod rotatably connected to the main drive sprocket via a connecting rod. When the hydraulic cylinder extends or retracts, it drives the main drive sprocket to rotate and move, thereby driving the open-loop chain to move around the drive sprocket. The other end of the open-loop chain is fixed to the mounting frame via a connector, enabling the lifting and lowering adjustment of the lifting component. As another preferred method, the open-loop chain adopts a double-row chain structure to enhance strength, the main drive sprocket tooth profile is optimized to an involute tooth profile to reduce impact, the hydraulic cylinder can selectively control the air intake through structures such as solenoid valves to adjust the output force and speed, and the transmission sprocket is arranged at the key support points of the frame to ensure that the chain tension is evenly distributed.

[0012] Furthermore, the mounting bracket is provided with a second mounting hole, and a capped screw is inserted into the second mounting hole. The outer circumference of the capped screw is threaded with two sets of limiting nuts distributed at both ends of the second mounting hole. The end of the capped screw is provided with a pin hole that is linked with the open-loop chain.

[0013] The beneficial effects of this technical solution are as follows: the structure of the capped screw and the limiting nut enables an adjustable connection between the mounting bracket and the open-loop chain, facilitating quick disassembly and adjustment during installation and maintenance. The limiting nut precisely controls the axial position of the screw, preventing loosening and ensuring transmission stability. The pin hole design simplifies the chain connection method, improves assembly efficiency, and allows for a certain range of flexibility compensation, reducing wear caused by alignment errors. As a preferred option, the capped screw can be designed to be made of high-strength alloy steel, with a threaded section machined in the middle. The limiting nut has a double-nut structure, which is tightened with a wrench to both sides of the second mounting hole to form a lock. A cotter pin is inserted into the pin hole to connect with the chain link, achieving reliable linkage. As another preferred option, the end of the capped screw is machined with a through hole as a pin hole. The diameter of the through hole is slightly larger than that of a standard pin shaft, allowing for slight oscillation. The chain is connected to the pin hole through a chain buckle, and the limiting nut is an anti-loosening nut to ensure that it does not loosen under vibration.

[0014] Furthermore, the output end of the hydraulic cylinder is linked to a U-shaped support member, the closed end of the U-shaped support member is linked to the output end of the hydraulic cylinder, a second rotating shaft is installed in the middle of the open end of the U-shaped support member, the main drive sprocket is movably disposed in the open end of the U-shaped support member, and the middle of the main drive sprocket is rotatably connected to the second rotating shaft.

[0015] The beneficial effects of this technical solution are as follows: the U-shaped support provides a stable support structure, evenly transmitting the output force of the hydraulic cylinder to the main drive sprocket, reducing stress concentration and vibration; the rotational connection of the second shaft ensures the free rotation of the sprocket, avoiding jamming or uneven wear. This design enhances the rigidity and durability of the drive system, making it suitable for high-frequency start-stop conditions, while simplifying the assembly process and reducing manufacturing and maintenance costs. As a preferred option, the U-shaped support can be designed as a bent steel plate, with the closed end connected to the hydraulic cylinder piston rod flange by bolts, and coaxial holes machined on both sides of the open end. The second shaft passes through these holes and is fixed by a retaining ring, and the main drive sprocket is mounted on the second shaft via bearings, achieving low-friction rotation. As another preferred option, the U-shaped support is made of cast aluminum alloy to reduce weight, the second shaft undergoes surface hardening to improve wear resistance, the teeth of the main drive sprocket are carburized, and the hydraulic cylinder output end is connected to the U-shaped support via a ball joint to compensate for installation errors and ensure concentricity of force transmission.

[0016] Furthermore, the lifting component is a lifting roller, and a third rotating shaft is rotatably connected to the middle of the lifting roller via a bearing, and the end of the third rotating shaft is fixed to the mounting frame.

[0017] The beneficial effects of this technical solution are as follows: the lifting roller, acting as a lifting component, can roll in contact with the surface of the roll, reducing frictional resistance and surface damage, and ensuring the integrity and smoothness of the coated paper roll during winding. The use of bearings allows the lifting roller to rotate freely, adapting to the rotation of the roll and avoiding wear or tear caused by sliding friction. The fixing method of the third shaft provides a stable support point, enhancing the rigidity of the overall structure and making it suitable for high-speed, high-load production conditions. As a preferred option, the lifting roller can be designed as a hollow steel tube with an outer polyurethane layer to increase the coefficient of friction and cushioning effect. The bearings are self-aligning ball bearings mounted on the third shaft, and both ends of the third shaft are fixed to supports on the mounting frame via keyways, achieving reliable transmission.

[0018] Furthermore, the frame is provided with two sets of parallel lifting rollers, which are symmetrically distributed on both sides below the take-up roller.

[0019] The beneficial effects of this technical solution are as follows: the symmetrical distribution of the two sets of lifting rollers achieves balanced support for the material roll, effectively distributing the load and preventing excessive stress at a single point from causing the winding shaft to bend or the material roll to deform. The parallel arrangement ensures uniform contact of the support surface, improves winding neatness, and reduces the risk of edge misalignment. This structure is suitable for wide-width roll production, enhances equipment adaptability and stability, and facilitates adjustment of the support angle to accommodate different roll diameters.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is an overall exploded view of an embodiment of the present utility model; Figure 2 This is a schematic cross-sectional view of an embodiment of the present utility model; Figure 3 for Figure 1 Enlarged view of a portion of point A in the middle; Figure 4 This is an exploded view of a portion of the mounting bracket structure in an embodiment of this utility model; Figure 5 This is a cross-sectional view of the roller in an embodiment of the present invention; Figure 6 This is a cross-sectional schematic diagram of the working state of an embodiment of the present utility model.

[0022] Explanation of reference numerals in the attached drawings: Frame 1, Slide rail 11; Lifting roller 2, Third rotating shaft 21; Floating device 3; Mounting bracket 31, Limit nut 311, Capped screw 312; Roller 321, First rotating shaft 322, Stop screw 323, Wear-resistant washer 324; Open-loop chain 331, Positioning block 332, Main drive sprocket 333, Hydraulic cylinder 334, U-shaped support 3341, Transmission sprocket 335. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 6 The illustrated material roller lifting device includes a frame 1, on which are mounted two sets of lifting rollers 2 distributed below the take-up shaft and supporting the material roll on the take-up shaft, and a floating device 3 linked to the lifting rollers 2. The two sets of lifting rollers 2 are symmetrically distributed on both sides below the take-up shaft. The symmetrical distribution of the two sets of lifting rollers 2 achieves balanced support for the material roll, effectively distributing the load and preventing the take-up shaft from bending or the material roll from deforming due to excessive stress at a single point. The floating device 3 can drive the two sets of lifting rollers 2 to move relative to the take-up shaft according to the change in the outer diameter of the material roll on the take-up shaft. By setting up the lifting rollers 2 and the floating device 3, the device can dynamically share the radial pressure and torque load borne by the take-up shaft, thereby effectively preventing the bending deformation problem of the air shaft due to long-term heavy load, improving the neatness of take-up, avoiding edge misalignment or "tower" defects, and thus ensuring the processing accuracy of subsequent processes such as slitting and cup making. In addition, the adaptive adjustment function of the floating device 3 reduces the need for manual intervention and improves the automation level and production efficiency of the equipment.

[0025] The middle part of the lifting roller 2 is rotatably connected to the third rotating shaft 21 via a bearing. The end of the third rotating shaft 21 is fixed to the mounting frame 31. As a lifting roller, the lifting roller 2 can roll in contact with the surface of the material roll, reducing frictional resistance and surface damage, and ensuring that the coated paper roll maintains its integrity and smoothness during the winding process. The use of bearings allows the lifting roller 2 to rotate freely, adapting to the rotation of the material roll and avoiding wear or tear caused by sliding friction. The fixing method of the third rotating shaft 21 provides a stable support point, enhances the rigidity of the overall structure, and is suitable for high-speed and high-load production conditions.

[0026] The floating device 3 includes a mounting frame 31 for mounting the lifting roller 2 and a sliding structure linked to the mounting frame 31. The sliding structure is slidably fitted with a slide rail 11, which is fixed to the frame 1. The mounting frame 31 or the sliding structure is linked to a drive source component. The drive source component drives the lifting roller 2 to move along the slide rail 11 through the mounting frame 31 or the sliding structure. Through the synergistic effect of the mounting frame 31, the sliding structure, and the drive source component, the precise linear movement of the lifting roller 2 is achieved. This ensures that the lifting roller 2 can adjust its position in time when the outer diameter of the roll changes during the winding process, thereby evenly distributing the load, reducing stress concentration on the winding shaft, and extending the service life of the equipment. The sliding structure adopts the slide rail 11 cooperation method, which improves the stability and accuracy of movement and avoids uneven winding caused by vibration or offset. The integration of the drive source component automates the adjustment process and reduces the complexity of operation.

[0027] The sliding structure includes two rows of rollers symmetrically distributed on both sides of the slide rail 11. Each roller group includes two rollers 321 that roll in cooperation with the slide rail 11. A first rotating shaft 322 is rotatably connected to the middle of each roller 321. A first mounting hole is provided on the mounting bracket 31 for each first rotating shaft 322. A stop screw 323 is connected to the end of the first rotating shaft 322 through a machined internal thread hole. Wear-resistant pads 324 are fitted on the outer circumference of the first rotating shaft 322. The wear-resistant pads 324 are distributed between the rollers 321 and the mounting bracket 31. The symmetrical distribution and rolling cooperation design of the rollers 321 significantly reduces sliding friction and improves the smoothness and durability of the floating device 3. The fixing method of the first rotating shaft 322 and the stop screw 323 ensures the stable installation of the rollers 321 and prevents loosening or displacement under load, thereby ensuring the accuracy of the position of the lifting roller 2. The use of wear-resistant pads 324 further reduces wear and extends the service life of key components, making it suitable for high-load continuous production environments.

[0028] The drive source assembly includes an open-loop chain 331 with one end linked to the mounting bracket 31, a positioning block 332 linked to the other end of the open-loop chain 331, a main drive sprocket 333 linked to the open-loop chain 331, and a hydraulic cylinder 334 distributed between the positioning block 332 and the mounting bracket 31 linked to the main drive sprocket 333. The body of the hydraulic cylinder 334 is fixed on the frame 1. Several sets of transmission sprockets 335 distributed between the hydraulic cylinders 334 and the mounting bracket 31 and linked to the open-loop chain 331 are also installed on the frame 1. The open-loop chain 331 and the sprocket drive system provide reliable power transmission and can achieve long-distance, high-precision positioning. The hydraulic cylinder 334, acting as the drive source, ensures rapid response and high torque output, adapting to rapid changes in the diameter of the coil during winding. The positioning block 332 limits the range of chain movement, preventing overshoot or chain derailment and improving safety. The distribution of the transmission sprockets 335 optimizes the force transmission path, reducing chain wear and noise and improving the overall reliability of the equipment. When the hydraulic cylinder 334 extends or retracts, it drives the main drive sprocket 333 to rotate and move, thereby driving the open-loop chain 331 to move around the transmission sprocket 335. The other end of the open-loop chain 331 is fixed to the mounting frame 31 through a connector, realizing the lifting and lowering adjustment of the lifting roller 2.

[0029] The mounting bracket 31 is provided with a second mounting hole, into which a capped screw 312 is inserted. The outer circumference of the capped screw 312 is threaded with two sets of limiting nuts 311 distributed at both ends of the second mounting hole. The end of the capped screw 312 is provided with a pin hole that is linked with the open-loop chain 331. The structure of the capped screw 312 and the limiting nuts 311 realizes the adjustable connection between the mounting bracket 31 and the open-loop chain 331, which facilitates quick disassembly and adjustment during installation and maintenance. The limiting nuts 311 can precisely control the axial position of the screw, prevent loosening, and ensure transmission stability. The pin hole design simplifies the chain connection method, improves assembly efficiency, and allows for a certain range of flexible compensation, reducing wear caused by alignment errors.

[0030] The output end of the hydraulic cylinder 334 is linked to a U-shaped support 3341. The closed end of the U-shaped support 3341 is linked to the output end of the hydraulic cylinder 334. A second rotating shaft is installed in the middle of the open end of the U-shaped support 3341. The main drive sprocket 333 is movably disposed in the open end of the U-shaped support 3341, and the middle of the main drive sprocket 333 is rotatably connected to the second rotating shaft. The U-shaped support 3341 provides a stable support structure, which evenly transmits the output force of the hydraulic cylinder 334 to the main drive sprocket 333, reducing stress concentration and vibration. The rotatable connection of the second rotating shaft ensures the free rotation of the sprocket and avoids jamming or uneven wear. This design enhances the rigidity and durability of the drive system, is suitable for high-frequency start-stop conditions, and simplifies the assembly process, reducing manufacturing and maintenance costs.

[0031] During the winding process, the outer diameter of the coated paper roll gradually increases. The hydraulic cylinder 334 extends and retracts, driving the U-shaped support 3341 to move, which in turn drives the main drive sprocket 333 to rotate. This rotation is then transmitted through the open-loop chain 331 and the transmission sprocket 335, causing the mounting frame 31 to move down along the slide rail 11. The two sets of lifting rollers 2 then descend to continuously support the roll, sharing the load of the winding shaft, balancing the load, and preventing uneven winding. The symmetrically arranged rollers 321 roll on the slide rail 11, reducing friction and ensuring smooth movement. The wear-resistant pads 324 and bearings reduce wear and extend their service life.

Claims

1. A material roller lifting device, comprising a frame, characterized in that: The frame is provided with at least one set of lifting members distributed below the take-up shaft and supporting the coil on the take-up shaft, and a floating device linked to the lifting members. The floating device can drive at least one set of lifting members to move relative to the take-up shaft according to the change of the outer diameter of the coil on the take-up shaft.

2. The material roller lifting device according to claim 1, characterized in that: The floating device includes a mounting frame for mounting the lifting component and a sliding structure linked to the mounting frame. The sliding structure is slidably fitted with a slide rail, which is fixed to the frame. The mounting frame or the sliding structure is linked to a drive source assembly, which drives the lifting component to move along the slide rail through the mounting frame or the sliding structure.

3. The material roller lifting device according to claim 2, characterized in that: The sliding structure includes two rows of rollers symmetrically distributed on both sides of the slide rail. Each roller group includes at least one roller that rolls with the slide rail. A first rotating shaft is rotatably connected to the center of each roller. The mounting bracket is provided with a first mounting hole for each first rotating shaft. A stop screw is connected to the end of the first rotating shaft through a machined internal thread hole. Wear-resistant pads are sleeved on the outer periphery of the first rotating shaft and are distributed between the roller and the mounting bracket.

4. The material roller lifting device according to claim 2, characterized in that: The drive source assembly includes an open-loop chain with one end linked to the mounting frame, and a positioning block linked to the other end of the open-loop chain. The positioning block is fixed to the frame. The open-loop chain is linked to a main drive sprocket. The main drive sprocket is linked to a hydraulic cylinder distributed between the positioning block and the mounting frame. The body of the hydraulic cylinder is fixed to the frame. The frame is also equipped with several sets of transmission sprockets distributed between the hydraulic cylinder and the mounting frame and linked to the open-loop chain.

5. The material roller lifting device according to claim 4, characterized in that: The mounting bracket is provided with a second mounting hole, and a capped screw is inserted into the second mounting hole. The outer circumference of the capped screw is threaded with two sets of limiting nuts distributed at both ends of the second mounting hole. The end of the capped screw is provided with a pin hole that is linked to the open-loop chain.

6. The material roller lifting device according to claim 4, characterized in that: The output end of the hydraulic cylinder is linked to a U-shaped support. The closed end of the U-shaped support is linked to the output end of the hydraulic cylinder. A second rotating shaft is installed in the middle of the open end of the U-shaped support. The main drive sprocket is movably disposed inside the open end of the U-shaped support, and the middle of the main drive sprocket is rotatably connected to the second rotating shaft.

7. The material roller lifting device according to any one of claims 1 to 6, characterized in that: The lifting component is a lifting roller, and a third rotating shaft is rotatably connected to the middle of the lifting roller via a bearing. The end of the third rotating shaft is fixed to the mounting frame.

8. The material roller lifting device according to claim 7, characterized in that: The frame is equipped with two sets of parallel lifting rollers, which are symmetrically distributed on both sides below the take-up roller.

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