A paper rubbing wheel which can be quickly replaced

Abstract

The utility model relates to paper rubbing wheel replacement technical field discloses a kind of quickly replaced paper rubbing wheel, including paper changing box, the paper changing box top is fixedly connected with two fixed frame, two the fixed frame inside rotationally connected with axle rod, the axle rod outer wall is fixedly connected with gear, the axle rod outer wall is equipped with paper rubbing wheel main part, the axle rod inside is provided with connecting assembly, the paper changing box inside is provided with adjusting assembly, the connecting assembly includes trapezoidal block and trapezoidal groove being opened in paper rubbing wheel main part inner wall, the trapezoidal block outer wall slidingly connects in the axle rod inside, the trapezoidal block and the trapezoidal groove are engaged, the trapezoidal block bottom is fixedly connected with limit plate. In the utility model, by pulling paper rubbing wheel main part, make trapezoidal groove extrude trapezoidal block, and when installing, it can be with the engagement of trapezoidal block and trapezoidal groove and the elastic force of spring one firmly fixed paper rubbing wheel main part, to reach the double effect of quick disassembly and stable installation paper rubbing wheel main part.

Description

Technical Field

[0001] This utility model relates to the field of paper feed roller replacement technology, and in particular to a paper feed roller that can be quickly replaced. Background Technology

[0002] In office automation equipment such as printers, copiers, and scanners, the paper feed roller is one of the core components for automatic paper feeding. It generates friction by contacting the paper surface, which drives the paper to move along a preset path, ensuring that the equipment can complete printing, copying, or scanning operations in an orderly manner. With the increasing frequency of use of office equipment, the paper feed roller will wear out and age due to long-term friction with the paper, which will affect the stability of paper feeding. Therefore, the need for quick replacement and maintenance of the paper feed roller is becoming increasingly prominent, and a quick-replaceable paper feed roller has emerged.

[0003] In existing technologies, paper feed rollers are typically connected to the drive shaft using bolts, clips, or other fixing methods. The technical principle is to firmly fix the paper feed rollers to the drive shaft through the tightening force of the bolts or the clamping force of the clips, so that the rotation of the drive shaft can drive the paper feed rollers to rotate synchronously, thereby realizing the feeding of paper. During the installation process, tools are needed to tighten the bolts or engage the clips to ensure the connection strength between the paper feed rollers and the drive shaft.

[0004] The problem with existing technology is that the disassembly and assembly process of the paper feed roller is relatively cumbersome. Because it is fixed by bolts or clips, when replacing the paper feed roller, it is necessary to use special tools to loosen the bolts or pry open the clips before the old paper feed roller can be removed. When installing the new paper feed roller, the opposite operation must be repeated. This is not only time-consuming, but also complicated, resulting in low equipment maintenance efficiency and causing many inconveniences to users. Therefore, a paper feed roller that can be quickly replaced is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a quick-replaceable paper feed roller, which aims to improve the problems of cumbersome disassembly and assembly and unstable fixing of traditional paper feed rollers in the prior art, resulting in low equipment maintenance efficiency and easy paper conveying failures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a quick-change paper feed roller, including a paper change box, two fixed frames are fixedly connected to the top of the paper change box, a shaft is rotatably connected inside the two fixed frames, a gear is fixedly connected to the outer wall of the shaft, the paper feed roller body is sleeved on the outer wall of the shaft, a connecting component is provided inside the shaft, and an adjustment component is provided inside the paper change box;

[0007] The connecting assembly includes a trapezoidal block and a trapezoidal groove formed on the inner wall of the paper feed roller body. The outer wall of the trapezoidal block is slidably connected to the inside of the shaft. The trapezoidal block and the trapezoidal groove are engaged. A limiting plate is fixedly connected to the bottom of the trapezoidal block. The outer wall of the limiting plate is slidably connected to the inside of the shaft. A spring is provided at the bottom of the limiting plate.

[0008] As a further description of the above technical solution:

[0009] One end of the spring is fixedly connected to the bottom of the limiting plate, and the other end of the spring is fixedly connected to the inside of the shaft.

[0010] As a further description of the above technical solution:

[0011] The adjustment assembly includes a sliding frame and a rotating wheel, with the outer wall of the sliding frame slidably connected to the inside of the paper changing box.

[0012] As a further description of the above technical solution:

[0013] The rotating wheel is rotatably connected to the inner wall of the sliding frame, and the rotating wheel is located at the bottom of the paper feed roller body.

[0014] As a further description of the above technical solution:

[0015] The outer wall of the rotating wheel is provided with anti-slip texture, and a rotating rod is fixedly connected inside the rotating wheel. The outer wall of the rotating rod is rotatably connected inside the sliding frame.

[0016] As a further description of the above technical solution:

[0017] The paper changing box is fixedly connected to a fixed frame inside, and the outer wall of the sliding frame is slidably connected to the fixed frame inside.

[0018] As a further description of the above technical solution:

[0019] A second spring is provided inside the fixed frame. One end of the second spring is fixedly connected inside the fixed frame, and the other end of the second spring is fixedly connected inside the sliding frame.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, by pulling the paper feed roller body, the trapezoidal groove squeezes the trapezoidal block. At this time, the trapezoidal block moves towards the inner wall of the shaft and drives the limiting plate to squeeze the spring. With continued force, the trapezoidal groove disengages from the trapezoidal block, and the shaft can then be easily operated. During installation, the paper feed roller body can be firmly fixed by the engagement of the trapezoidal block and the trapezoidal groove and the elasticity of the spring. This achieves the dual effect of quick disassembly and stable installation of the paper feed roller body, solving the problems of troublesome disassembly and assembly and unstable fixing of traditional paper feed rollers, which leads to low equipment maintenance efficiency and easy paper conveying failures. It improves the convenience of equipment maintenance and the stability of paper feed roller installation.

[0022] 2. In this utility model, the paper is conveyed through the gap between the paper feeding roller body and the rotating roller. The anti-slip texture on the outer wall of the rotating roller increases the friction with the paper, preventing the paper from slipping during conveying. At the same time, with the help of the elastic force of the second spring, the sliding frame drives the rotating roller to always apply appropriate pressure to the paper, keeping the paper in a stable clamped state. This ensures smooth paper conveying and solves the problems of paper slippage, insufficient clamping force leading to conveying misalignment and paper jams in traditional conveying methods, thus improving the stability and accuracy of paper conveying. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of a quick-change paper feed roller proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the main body of a paper feed roller that can be quickly replaced according to this utility model.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a schematic diagram of the paper changing box for a quick-change paper feed roller proposed in this utility model.

[0027] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0028] Legend:

[0029] 1. Paper tray replacement; 2. Fixing frame; 3. Shaft; 4. Gear; 5. Paper feed roller body; 6. Trapezoidal groove; 7. Trapezoidal block; 8. Limiting plate; 9. Spring 1; 10. Sliding frame; 11. Rotating wheel; 12. Rotating rod; 13. Anti-slip texture; 14. Fixing frame; 15. Spring 2. Detailed Implementation

[0030] 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.

[0031] Reference Figures 1-3 This utility model provides an embodiment of a quick-change paper feed roller, including a paper changing box 1. The paper changing box 1 is installed inside the printer to hold the paper to be processed, providing a stable bearing space for the entire device and ensuring that the paper is in an orderly stacked state before conveying, facilitating subsequent conveying operations. Two fixing brackets 2 are fixedly connected to the top of the paper changing box 1, providing stable support for the shaft 3 and enabling it to rotate smoothly on a preset trajectory, providing a reliable operating foundation for the paper feed roller body 5. The shaft 3 is rotatably connected inside the two fixing brackets 2, transmitting external power to the paper feed roller body 5. Through its own rotational motion, the shaft 3 drives the paper feed roller body 5 to rotate synchronously, achieving the effect of driving paper conveying. When the printer is working, the shaft... The rotation of shaft 3 causes the paper feed roller body 5 to carry the paper out of the paper changing box 1. A gear 4 is fixedly connected to the outer wall of shaft 3. The gear 4 is used to mesh with the drive component inside the equipment to transmit the power of the drive device to shaft 3, thereby driving shaft 3 to rotate. The paper feed roller body 5 is sleeved on the outer wall of shaft 3. The paper feed roller body 5 is used to directly contact the paper surface and use the friction between itself and the paper to drive the paper to move, thereby completing the paper conveying effect. A connecting component is set inside shaft 3. The connecting component is used to realize the quick disassembly and assembly of paper feed roller body 5 and shaft 3, and to facilitate the replacement of paper feed roller body 5. An adjustment component is set inside paper changing box 1. The adjustment component is used to adjust the pressure between paper feed roller body 5 and rotating wheel 11 to adapt to the conveying needs of paper of different thicknesses.

[0032] The connecting assembly includes a trapezoidal block 7 and a trapezoidal groove 6 formed on the inner wall of the paper feed roller body 5. The outer wall of the trapezoidal block 7 is slidably connected to the inside of the shaft 3. The trapezoidal block 7 and the trapezoidal groove 6 engage with each other. The trapezoidal block 7 and the trapezoidal groove 6 cooperate to limit the relative displacement between the paper feed roller body 5 and the shaft 3. When the shaft 3 rotates, it drives the paper feed roller body 5 to rotate together, achieving the effect of synchronous movement between the two. A limit plate 8 is fixedly connected to the bottom of the trapezoidal block 7. The outer wall of the limit plate 8 is slidably connected to the inside of the shaft 3. The limit plate 8 is used to limit the trapezoidal block 7 within the shaft 3. The sliding distance prevents the trapezoidal block 7 from dislodging from the internal structure of the shaft 3, ensuring the integrity of the connecting components. A spring 9 is provided at the bottom of the limiting plate 8. One end of the spring 9 is fixedly connected to the bottom of the limiting plate 8, and the other end of the spring 9 is fixedly connected to the inside of the shaft 3. The spring 9 is used to provide elastic thrust for the trapezoidal block 7, so that the trapezoidal block 7 always maintains the tendency to engage with the trapezoidal groove 6, achieving the effect of firmly connecting the paper feed roller body 5 and the shaft 3. When installing the paper feed roller body 5, the elastic force of the spring 9 can make the trapezoidal block 7 automatically engage with the trapezoidal groove 6.

[0033] Reference Figure 4 and Figure 5 The adjustment component includes a sliding frame 10 and a rotating wheel 11. The outer wall of the sliding frame 10 is slidably connected to the inside of the paper changing box 1. The sliding frame 10 is used to install the rotating wheel 11 and slides the rotating wheel 11 up and down inside the paper changing box 1 to adjust the distance between the rotating wheel 11 and the paper feed roller body 5. The rotating wheel 11 is rotatably connected to the inner wall of the sliding frame 10 and is located at the bottom of the paper feed roller body 5. The rotating wheel 11 and the paper feed roller body 5 cooperate to clamp the paper. When both rotate, they drive the paper forward to assist in paper feeding. When the paper passes between them, the rotation of the rotating wheel 11 reduces the resistance during paper feeding. The outer wall of the rotating wheel 11 has anti-slip texture 13 to increase the friction between the rotating wheel 11 and the paper surface and prevent the paper from slipping during feeding. A rotating rod 12 is fixedly connected inside the rotating wheel 11. The outer wall of the rotating rod 12 is rotatably connected to the sliding frame 10. Inside the sliding frame 10, the rotating rod 12 supports the rotating wheel 11, allowing the rotating wheel 11 to rotate flexibly within the sliding frame 10 and ensuring its normal operation. Inside the paper changing box 1, a fixed frame 14 is fixedly connected. The outer wall of the sliding frame 10 is slidably connected to the fixed frame 14. The fixed frame 14 and the sliding frame 10 cooperate to guide the sliding direction of the sliding frame 10, ensuring that the sliding frame 10 can only move up and down along a fixed trajectory, thus ensuring the stability of the adjustment component. Inside the fixed frame 14, a second spring 15 is installed. One end of the second spring 15 is fixedly connected inside the fixed frame 14, and the other end is fixedly connected inside the sliding frame 10. The second spring 15 provides an upward elastic force to the sliding frame 10, ensuring that the rotating wheel 11 always maintains appropriate pressure with the paper feeding roller body 5, achieving the effect of adapting to different paper thicknesses and stable conveying. When conveying thicker paper, the second spring 15 will be compressed, but it can still maintain the clamping force on the paper.

[0034] Working principle: When replacing the paper feed roller body 5, by pulling the paper feed roller body 5, the trapezoidal groove 6 on its inner wall will squeeze the trapezoidal block 7 in the shaft 3, forcing the trapezoidal block 7 to slide into the shaft 3. At the same time, it will drive the bottom limiting plate 8 to compress the spring 9. When the force is continuously applied and the trapezoidal groove 6 is completely disengaged from the trapezoidal block 7, the old paper feed roller body 5 can be removed from the shaft 3. When installing the new paper feed roller body 5, push it in the opposite direction to fit it into the shaft 3. The trapezoidal block 7 will reset under the elastic force of the spring 9 and re-clamp into the trapezoidal groove 6. The limiting plate 8 restricts the sliding stroke of the trapezoidal block 7, ensuring that the paper feed roller body 5 and the shaft 3 are firmly connected, realizing quick disassembly and reliable fixation.

[0035] During paper feeding, external power is transmitted to shaft 3 via gear 4, causing the paper feed roller body 5 to rotate. Paper from the paper changing box 1 enters the gap between the paper feed roller body 5 and the rotating wheel 11. The rotating wheel 11 rotates flexibly within the sliding frame 10 via the rotating rod 12. The anti-slip texture 13 on its outer wall increases the friction with the paper to prevent slippage. At the same time, spring 15 in the fixed frame 14 applies an upward elastic force to the sliding frame 10, ensuring that the rotating wheel 11 is always in close contact with the paper feed roller body 5, thus ensuring that the paper is stably clamped. When feeding paper of different thicknesses, spring 15 can adapt by extending and retracting. The distance is adjusted by sliding the sliding frame 10 within the fixed frame 14 to ensure that the clamping force is always appropriate, achieving smooth and accurate paper feeding.

Claims

1. A quick-change paper feed roller, comprising a paper changing box (1), characterized in that: The top of the paper changing box (1) is fixedly connected to two fixed frames (2), and the two fixed frames (2) are rotatably connected to a shaft (3). The outer wall of the shaft (3) is fixedly connected to a gear (4), and the outer wall of the shaft (3) is fitted with a paper feeding wheel body (5). A connecting component is provided inside the shaft (3), and an adjustment component is provided inside the paper changing box (1). The connecting assembly includes a trapezoidal block (7) and a trapezoidal groove (6) formed on the inner wall of the paper feed roller body (5). The outer wall of the trapezoidal block (7) is slidably connected to the inside of the shaft (3). The trapezoidal block (7) and the trapezoidal groove (6) are engaged. A limiting plate (8) is fixedly connected to the bottom of the trapezoidal block (7). The outer wall of the limiting plate (8) is slidably connected to the inside of the shaft (3). A spring (9) is provided at the bottom of the limiting plate (8).

2. The quick-change paper feed roller according to claim 1, characterized in that: One end of the spring (9) is fixedly connected to the bottom of the limiting plate (8), and the other end of the spring (9) is fixedly connected to the inside of the shaft (3).

3. The quick-change paper feed roller according to claim 1, characterized in that: The adjustment assembly includes a sliding frame (10) and a rotating wheel (11), with the outer wall of the sliding frame (10) slidably connected to the inside of the paper changing box (1).

4. The quick-change paper feed roller according to claim 3, characterized in that: The rotating wheel (11) is rotatably connected to the inner wall of the sliding frame (10), and the rotating wheel (11) is located at the bottom of the paper feed roller body (5).

5. A quick-change paper feed roller according to claim 4, characterized in that: The outer wall of the rotating wheel (11) is provided with anti-slip texture (13), and a rotating rod (12) is fixedly connected inside the rotating wheel (11). The outer wall of the rotating rod (12) is rotatably connected inside the sliding frame (10).

6. The quick-change paper feed roller according to claim 3, characterized in that: The paper changing box (1) is fixedly connected to a fixed frame (14) inside, and the outer wall of the sliding frame (10) is slidably connected to the fixed frame (14).

7. A quick-change paper feed roller according to claim 6, characterized in that: A second spring (15) is provided inside the fixed frame (14). One end of the second spring (15) is fixedly connected inside the fixed frame (14), and the other end of the second spring (15) is fixedly connected inside the sliding frame (10).

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