Inter-roller fine adjustment structure

Abstract

The utility model discloses a kind of roll spacing fine adjustment structure, including rack, be equipped with upper roll, lower roll, lifting cylinder and mounting plate on the rack, upper roll, lower roll are used to convey paper, mounting plate is fixedly connected with rack, lifting cylinder is set on mounting plate, the movable rod of lifting cylinder is driven connection with upper roll, for driving upper roll lifting to adjust the spacing between upper roll and lower roll, rack is also equipped with spacing fine adjustment subassembly, spacing fine adjustment subassembly includes the screw rod and adjusting nut of vertical setting, screw rod is fixedly connected with the movable rod of lifting cylinder, the extension length of movable rod of lifting cylinder is adjusted by the cooperation of nut and screw rod, so as to fine adjustment the spacing between upper roll and lower roll, simple operation, fine adjustment efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of paper production equipment, and in particular to a roller spacing fine-tuning structure. Background Technology

[0002] In industrial sectors such as paper production, printing, packaging, and office automation, rollers, cylindrical components made of metal or high-strength plastic, undergo special surface treatments to enhance wear resistance and friction. They achieve fully automated paper transport through physical contact and rolling friction. In application scenarios, the paper industry requires rollers to withstand high-temperature and high-humidity environments and possess high-precision surface treatment to ensure paper smoothness and uniform thickness. Meanwhile, the printing, packaging, and office automation sectors respectively emphasize synchronous stability, rapid response capabilities, and miniaturized design, collectively supporting efficient and precise paper transport systems.

[0003] In fully automated paper conveying systems, two rollers, one above the other, are typically used for paper transport. Currently, cylinder-controlled lifting technology is widely used to control the rollers' movement. When transporting ordinary paper, since there are no requirements regarding paper thickness, the two rollers make hard contact without any gap. One roller is the driving roller, and the other is the driven roller. The friction between the paper and the driven roller causes the driven roller to rotate, and the driving and driven rollers work together to transport ordinary paper.

[0004] However, when conveying certain types of paper, the gap between the two rollers must be precisely matched to the paper's thickness requirements. The rollers must maintain contact with the paper while preserving the gap. If the gap is too small, the paper will be continuously compressed during transport, causing physical deformation, especially in the production of patterned paper (such as...). Figure 3 As shown, when the paper surface is uneven, if the roller spacing is too small, it will directly flatten the surface texture, destroy the uneven structure, and seriously affect the product quality. For example, for 0.7mm patterned paper, the roller spacing is required to be 0.5-0.6mm. The two rollers contact the surface of the patterned paper without damaging the structure of the patterned paper. However, if the roller spacing is 0.2mm, the pattern on the surface of the patterned paper will be directly flattened.

[0005] The cylinder adjustment technology has certain limitations in this application. The response speed and accuracy of the cylinder are easily affected by air pressure fluctuations or mechanical wear, resulting in insufficient sensitivity in the adjustment process. Manual intervention is required to calibrate the cylinder parameters, making it impossible to quickly and accurately adjust the spacing between the two rollers used to transport patterned paper. To address this issue, patent CN120503502A proposes an improved solution: this solution uses a screw to control the two sliders to move closer or further apart via a reverse spiral, thereby changing the height of the linkage rod and controlling the lifting and lowering of the drive roller to adjust the spacing between the drive and driven rollers. Although this solution offers high adjustment accuracy, its structure is complex, and it suffers from the following problems in practical application: since this solution achieves spacing adjustment by changing the position of the drive roller (only in the vertical direction), and the drive roller is driven by a belt, the belt tension changes as the position of the drive roller changes. Therefore, the belt needs to be readjusted after each adjustment of the drive roller's position.

[0006] Therefore, how to optimize the roller spacing control technology to solve the shortcomings of cylinder adjustment, while ensuring structural simplicity, and avoiding the impact of roller spacing adjustment on the transmission components, has become an urgent technical problem to be solved. Utility Model Content

[0007] The purpose of this invention is to solve one of the above-mentioned defects and provide a roller spacing fine-tuning structure.

[0008] The objective of this utility model is achieved through the following means: A roller spacing fine-tuning structure includes a frame, on which are mounted an upper roller, a lower roller, a lifting cylinder, and a mounting plate. The upper and lower rollers are used to feed paper. The mounting plate is fixedly connected to the frame. The lifting cylinder is mounted on the mounting plate, and its movable rod is driven by the upper roller to drive the upper roller to lift and lower, thereby adjusting the spacing between the upper and lower rollers. The frame also includes a spacing fine-tuning component, which includes a vertically arranged screw and an adjusting nut. The screw is fixedly connected to the movable rod of the lifting cylinder. The adjusting nut, in conjunction with the screw, drives the screw to lift and lower, fine-tuning the length of the output shaft of the lifting cylinder, thereby fine-tuning the spacing between the upper and lower rollers.

[0009] As a preferred embodiment, the lifting cylinder is located on the upper side of the mounting plate, the movable rod extends from the lower side of the mounting plate, the mounting plate is provided with a clearance hole that extends from the upper end face of the mounting plate to the lower end face, the screw is slidably connected to the clearance hole, and passes through the clearance hole from the lower side of the mounting plate to be fixedly connected to the movable rod, and the adjusting nut is located on the upper side of the mounting plate.

[0010] As a preferred embodiment, the screw is fixedly connected to the movable rod via a connecting rod.

[0011] As a preferred embodiment, there are two connecting rods, which form a right-angled triangle with the screw.

[0012] As a preferred embodiment, the lower roller is the driving roller, the upper roller is the driven roller, and the frame is also provided with a connecting rod. The upper roller is rotatably mounted on the connecting rod and located between the left and right ends of the connecting rod. One end of the connecting rod is rotatably connected to the frame, and the other end of the connecting rod is rotatably connected to the movable rod of the lifting cylinder, forming a connecting rod mechanism.

[0013] The beneficial effects of this utility model are as follows: 1. By finely adjusting the extension length of the lifting cylinder's movable rod through the cooperation of the nut and the screw, the distance between the upper and lower rollers can be finely adjusted. The operation is simple and the fine-tuning efficiency is high. 2. By setting the upper roller, which serves as the driven roller, between the two ends of the connecting rod, the load distribution is optimized, allowing the lifting cylinder or the distance fine-tuning component to drive the upper roller to rise and fall with only a small force, while avoiding the impact of changes in the upper roller's position on the transmission system matching. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment. Figure 2 This is a schematic diagram of paper delivery in an embodiment. Figure 3 This is a schematic diagram of the patterned paper structure in an embodiment. Explanation of reference numerals in the attached diagram: 1-Frame; 2-Upper roller; 3-Lower roller; 4-Lifting cylinder; 401-Moving rod; 5-Mounting plate; 6-Connecting rod; 7-Nut; 8-Screw; 9-Connecting rod; 10-Paper. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] To facilitate understanding, the present invention will now be described in further detail with reference to specific implementation examples, but this is not intended to limit the present invention.

[0017] like Figure 1-3As shown, this utility model discloses a roller spacing fine-tuning structure, including a frame 1. The frame 1 is equipped with an upper roller 2, a lower roller 3, a lifting cylinder 4, a mounting plate 5, a connecting rod 6, and a spacing fine-tuning component. The upper roller 2 and lower roller 3 are used to convey paper 10. The mounting plate 5 is fixedly connected to the frame 1. The lifting cylinder 4 is mounted on the mounting plate 5. The movable rod 401 of the lifting cylinder 4 is driven to the upper roller 2 and is used to drive the upper roller 2 to rise and fall to adjust the spacing between the upper roller 2 and the lower roller 3. The spacing fine-tuning component includes a vertically arranged screw 8 and an adjusting nut 7. The screw 8 is fixedly connected to the movable rod 401. The screw 8 is driven to rise and fall by the cooperation of the adjusting nut 7 and the screw 8, and the length of the output shaft of the lifting cylinder 4 is finely adjusted, thereby fine-tuning the spacing between the upper roller 2 and the lower roller 3. The operation is simple and the fine-tuning efficiency is high.

[0018] Specifically, the lifting cylinder 4 is located on the upper side of the mounting plate 5, the movable rod 401 extends from the lower side of the mounting plate 5, the mounting plate 5 is provided with a clearance hole, the clearance hole extends from the upper end face of the mounting plate 5 to the lower end face, the screw 8 is slidably connected to the clearance hole, and passes through the clearance hole from the lower side of the mounting plate 5, and is fixedly connected to the movable rod 401 through the connecting rod 9, the adjusting nut 7 is located on the upper side of the mounting plate 5. In this embodiment, there are two connecting rods 9, and the two connecting rods 9 and the screw 8 form a right triangle to enhance the stability of the structure and prevent the connecting rods 9 from deforming.

[0019] The drive roller is driven directly or indirectly by the output shaft of the motor. When the drive roller is directly driven by the output shaft, adjusting the position of the drive roller requires changing the position of the motor as well. This not only requires the lifting cylinder 4 to do more work, increasing production costs, but also requires sufficient space for the motor to move, thus requiring more space for the equipment. However, when the drive roller is driven by the output shaft through a belt or gear pitch, changes in the position of the drive roller may affect the belt tension or the meshing between the gears, requiring readjustment of the belt or replacement of the gears. Therefore, in this embodiment, the lower roller 3 is the drive roller, and the upper roller 2 is the driven roller. The upper roller 2 is rotatably mounted on the connecting rod 6 and located between the left and right ends of the connecting rod 6. One end of the connecting rod 6 is rotatably connected to the frame 1, and the other end of the connecting rod 6 is rotatably connected to the movable rod 401, forming the connecting rod 6 mechanism. By positioning the upper roller 2, as the driven roller, between the two ends of the connecting rod 6, the load distribution is optimized, allowing the lifting cylinder 4 or the pitch fine-tuning component to drive the upper roller 2 to rise and fall with only a small force, while avoiding the impact of changes in the position of the upper roller 2 on the matching of the transmission system.

[0020] The principle of this utility model is as follows: When paper 10 with thickness requirements needs to be conveyed, the upper roller 2 and the lower roller 3 are driven to fit together by the lifting cylinder 4. During this process, the nut 7 is not screwed into the upper end of the screw 8 or is located at the upper end of the screw 8 but maintains a distance from the upper end surface of the mounting plate 5. After the upper roller 2 and the lower roller 3 are fitted together, the nut 7 is rotated so that the lower end of the nut 7 abuts against the upper end surface of the mounting plate 5. With the mounting plate 5 as support, the screw 8 is driven to rise by the thread. The screw 8 drives the movable rod 401 of the cylinder to rise. The connecting rod 6 connected to the movable rod 401 rises together with the movable rod 401, thereby driving the upper roller 2 to rise and realizing the fine adjustment of the distance between the upper roller 2 and the lower roller 3. When the paper 10 being conveyed has no thickness requirements, the upper roller 2 and the lower roller 3 are driven to fit together by the lifting cylinder 4.

[0021] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A roller spacing fine-tuning structure, comprising a frame, an upper roller, a lower roller, a lifting cylinder, and a mounting plate on the frame, wherein the upper roller and the lower roller are used for conveying paper, the mounting plate is fixedly connected to the frame, the lifting cylinder is mounted on the mounting plate, and the movable rod of the lifting cylinder is driven to the upper roller for driving the upper roller to rise and fall to adjust the spacing between the upper roller and the lower roller, characterized in that... The frame is also equipped with a spacing fine-tuning component, which includes a vertically arranged screw and an adjusting nut. The screw is fixedly connected to the movable rod of the lifting cylinder. The adjusting nut and the screw are used to drive the screw to move up and down, thereby fine-tuning the length of the output shaft of the lifting cylinder and thus fine-tuning the spacing between the upper and lower rollers.

2. The roller spacing fine-tuning structure according to claim 1, characterized in that, The lifting cylinder is located on the upper side of the mounting plate, and the movable rod of the lifting cylinder extends from the lower side of the mounting plate. The mounting plate is provided with a clearance hole, which extends from the upper end face of the mounting plate to the lower end face. The screw is slidably connected to the clearance hole and passes through the clearance hole from the lower side of the mounting plate to be fixedly connected to the movable rod of the lifting cylinder. The adjusting nut is located on the upper side of the mounting plate.

3. The roller spacing fine-tuning structure according to claim 2, characterized in that, The screw is fixedly connected to the movable rod via a connecting rod.

4. The roller spacing fine-tuning structure according to claim 3, characterized in that, The number of connecting rods is two, and the two connecting rods and the screw form a right-angled triangle.

5. The roller spacing fine-tuning structure according to claim 1, 2, or 3, characterized in that, The lower roller is the driving roller, the upper roller is the driven roller, and the frame is also provided with a connecting rod. The upper roller is rotatably mounted on the connecting rod and is located between the left and right ends of the connecting rod. One end of the connecting rod is rotatably connected to the frame, and the other end of the connecting rod is rotatably connected to the movable rod of the lifting cylinder, forming a connecting rod mechanism.

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