A high-efficiency automatic paper feeding device for a printing machine

Abstract

The utility model relates to printing machine technical field discloses a kind of high-efficiency automatic paper feeding devices for printing machine, including base, the top of base is provided with conveying assembly, the top front side of base is provided with detection assembly, the top of base is fixedly connected with two servo motors two, the output of two servo motors two is all fixedly connected with ball screw, the outer wall of two ball screws is all rotationally connected with movable positioning baffle, the top of base is provided with moving plate, the top front side left and right ends of moving plate are all fixedly connected with fixed rod two, the inner wall of two fixed rod two is all rotationally connected with same shaft two, the outer wall of two shaft two is all fixedly connected with guide wheel.In the utility model, servo motor drives ball screw, drives movable positioning baffle transverse positioning paper, moving plate guide wheel is driven by another servo motor, prevent paper from running off, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to a high-efficiency automatic paper feeding device for printing presses. Background Technology

[0002] The high-efficiency automatic paper feeding device for printing presses is an automatic paper feeding device specifically designed for the working characteristics of printing presses. It needs to be coordinated with the operating rhythm of the printing press to ensure that the paper enters the printing press at the right time and in the correct posture for printing, and can meet the diverse paper feeding needs of different types of printing presses.

[0003] A search revealed Chinese Patent Publication No. CN220641900U, which discloses a semi-automatic paper roll conveying device for upper and lower layers. The device includes a front conveyor and a rear conveyor. The outlet end of the front conveyor belt is connected to the inlet end of a movable conveyor belt, and the outlet end of the movable conveyor belt is connected to the inlet end of an upper conveyor belt. The lower conveyor belt is installed directly below the upper conveyor belt. The end of the front conveyor belt is hinged to the end of the movable conveyor belt. A mounting base is provided below the movable conveyor belt. A cylinder and a control module are mounted on the top of the mounting base. The control module drives the piston rod of the cylinder to extend and retract. One end of the cylinder body is hinged to the mounting base, and one end of the cylinder piston rod is hinged to the bottom of the movable conveyor belt. This invention allows the movable conveyor belt to connect with different conveyor belts under the control of the cylinder, eliminating the need for time-consuming and laborious manual handling of the paper roll, effectively improving the overall production efficiency of the paper roll. However, in actual use, while the semi-automatic paper feeding device has certain advantages in operational flexibility, its working efficiency is low, and product quality can be unstable due to human factors, limiting the speed and efficiency of the overall production line. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a high-efficiency automatic paper feeding device for printing presses, which aims to improve the problem of low working efficiency of existing semi-automatic paper feeding devices, which limits the speed and efficiency of the overall production line.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency automatic paper feeding device for a printing press, comprising a base, a conveying component on the top of the base, a detection component on the front side of the top of the base, two servo motors II fixedly connected to the top of the base, ball screws fixedly connected to the output ends of the two servo motors II, movable positioning baffles rotatably connected to the outer walls of the two ball screws, a movable plate on the top of the base, fixed rods II fixedly connected to the left and right ends of the front side of the top of the movable plate, the same rotating shaft II rotatably connected to the inner walls of the two fixed rods II, guide wheels fixedly connected to the outer walls of the two rotating shafts II, transmission gears II fixedly connected to the opposite ends of the two rotating shafts II, servo motors III fixedly connected to the left and right ends of the rear side of the bottom of the movable plate, drive gears II fixedly connected to the output ends of the two servo motors III, and the two drive gears II respectively meshing with the corresponding transmission gears II via tracks, and a fine-tuning mechanism provided on the inner wall of the base.

[0006] Through the above technical solution: the conveying device in the conveying assembly operates on top of the base, conveying the paper placed on it forward. The roller auxiliary conveying device in the fixed rod on the front side of the base smoothly feeds the paper. Once the detection component detects paper deviation, it immediately provides feedback. Two servo motors drive the ball screws connected to them to rotate. When the detection component reports the paper position deviation, the servo motors precisely adjust the rotation of the ball screws based on the feedback. Because the movable positioning baffle is rotatably connected to the ball screw, the rotation of the ball screw drives the movable positioning baffle to move horizontally, pushing the paper to the correct position, achieving precise lateral positioning, and ensuring that the paper is in the center of the conveying path. The guide wheel on the moving plate further ensures the conveying accuracy. The servo motor drives the drive gear to rotate, and the drive gear drives the transmission gear, which in turn causes the guide wheel to rotate, preventing the paper from deviating. All components work closely together, effectively avoiding the influence of human factors, improving work efficiency and product quality, and enhancing the overall efficiency of the production line.

[0007] As a further description of the above technical solution: The fine-tuning mechanism includes a fine-tuning screw, the outer wall of which is rotatably connected to the inner wall of the moving plate. A transmission gear is fixedly connected to the bottom of the fine-tuning screw, and a rotating shaft is fixedly connected to the bottom of the transmission gear. The bottom of the rotating shaft is rotatably connected to the bottom side of the inner wall of the base. A servo motor is fixedly connected to the rear end of the bottom side of the base. A drive gear is fixedly connected to the output end of the servo motor. The drive gear meshes with the transmission gear. Guide rods are fixedly connected to all four sides of the bottom side of the inner wall of the base. Slide grooves are formed around all four sides of the moving plate. The inner walls of the multiple slide grooves are slidably connected to the outer walls of the guide rods respectively.

[0008] Through the above technical solution: the active gear at the output end of the servo motor rotates, and the transmission gear meshing with the active gear rotates accordingly, thereby driving the rotating shaft connected to it to rotate, causing the fine adjustment screw fixed on the rotating shaft to rotate. Since the fine adjustment screw is rotatably connected to the inner wall of the moving plate, and the sliding groove around the plate moves in a sliding fit with the guide rod around the inner wall of the base, when the fine adjustment screw rotates, the moving plate can only move up and down along the guide rod. This mechanism can accurately adjust the height of the guide wheel on the moving plate, adapt to different paper thicknesses, effectively avoid paper jams and deviations, and improve paper feeding accuracy and printing quality.

[0009] As a further description of the above technical solution: The detection assembly includes a first detection frame, the bottom of which is fixedly connected to the top front side of the base. A photoelectric sensor is fixedly connected to the bottom of the first detection frame. A second detection frame is fixedly connected to both the left and right top ends of the base. A photoelectric sensor is fixedly connected to the bottom of the second detection frame.

[0010] Through the above technical solution: the photoelectric sensor at the bottom of the first detection frame monitors the position of the front end of the paper in real time to determine whether the paper has reached the designated position; the photoelectric sensor at the bottom of the second detection frame monitors the left and right position and width of the paper. Once the position and width of the paper deviate, the sensor will quickly provide feedback so that the subsequent components can adjust in time to ensure accurate paper delivery and improve the accuracy and quality of printing.

[0011] As a further description of the above technical solution: The conveying assembly includes a conveying device. The bottom of the conveying device is fixedly connected to the top of the base. The left and right front ends of the base are each fixedly connected to a fixing rod. The inner walls of the two fixing rods are rotatably connected to the same roller. The top of the left and right front ends of the conveying device are respectively fixedly connected to the bottom of the corresponding servo motor.

[0012] Through the above technical solution: the servo motor drives the conveying device to operate. Since the bottom of the conveying device is fixed to the top of the base and the front left and right sides are connected to the servo motor, it can drive the paper placed on it to move forward. The roller auxiliary conveying device on the inner wall of the fixed rod on the front side of the base makes the paper conveying more stable, ensuring that the paper smoothly enters the subsequent printing process and improving the paper feeding efficiency and stability.

[0013] As a further description of the above technical solution: The top rear side of the base is fixedly connected to two fixing rods, and the inner walls of the two fixing rods are rotatably connected to the same pre-pressure roller.

[0014] Through the above technical solution: the paper is conveyed to the pre-pressing roller by the conveying device. The pre-pressing roller rotates under the support of the fixed rod and pre-presses the paper to make it flat, reduce wrinkles, facilitate subsequent printing, and improve printing quality.

[0015] As a further description of the above technical solution: The inner walls of the two movable positioning baffles are slidably connected to limit rods on the left and right sides, and the left and right ends of the two limit rods are fixedly connected to limit plates. The bottoms of the multiple limit plates are respectively fixedly connected to the top of the left and right ends of the front side of the conveying device.

[0016] The above technical solution involves the movable positioning baffle sliding along the limiting rod as it moves. The limiting plates at both ends of the limiting rod prevent the baffle from moving excessively, ensuring accurate paper positioning and improving the paper conveying position accuracy.

[0017] As a further description of the above technical solution: The two servo motors have the same output direction, and the diameters of the two transmission gears are both larger than the diameters of the two drive gears.

[0018] The above technical solution involves two servo motors with the same output direction, driving the second drive gear to rotate in the same direction. The diameter of the second transmission gear is larger than that of the second drive gear, which can achieve speed reduction and torque increase, and accurately and smoothly drive the guide wheel to finely adjust the paper conveying direction.

[0019] As a further description of the above technical solution: Two limiting blocks are fixedly connected to the top of the outer wall of each of the multiple guide rods, and one side of each of the multiple limiting blocks is respectively attached to the upper and lower sides of the moving plate.

[0020] The above technical solution involves the limiting block on the guide rod fitting into the movable plate, restricting the range of movement of the movable plate on the guide rod, and ensuring its stable up-and-down fine adjustment.

[0021] This utility model has the following beneficial effects: 1. In this utility model, the roller assists in the smooth conveying of paper. In the detection component, the first front-end photoelectric sensor monitors the position of the front end of the paper, and the second photoelectric sensor monitors the left and right position and width of the paper. If there is a deviation, feedback is given, and the servo motor adjusts the ball screw according to the feedback, which drives the movable positioning baffle to move precisely along the limit rod to position the paper. The guide wheel on the moving plate is driven by the servo motor outputting in the same direction through the cooperation of the large-diameter transmission gear two and the small-diameter drive gear two, which precisely rotates to prevent the paper from deviating and improves work efficiency.

[0022] 2. In this utility model, when adjustments are needed for paper of different thicknesses, once the servo motor is started, its output active gear rotates, driving the transmission gear meshing with it to rotate, which in turn causes the connected rotating shaft to drive the fine adjustment screw to rotate. Because the sliding grooves around the moving plate are slidably connected to the guide rods on the inner wall of the base, the moving plate can only be finely adjusted up and down along the guide rods, causing the height of the guide wheel on it to change. When the paper is thick, the guide wheel is raised to prevent squeezing, and when the paper is thin, the guide wheel is lowered to maintain stability, improve the conveying accuracy, avoid paper jams and deviation, and ensure printing quality. Attached Figure Description

[0023] Figure 1 This is a perspective view of a high-efficiency automatic paper feeding device for a printing press proposed in this utility model; Figure 2 This is a front view of a high-efficiency automatic paper feeding device for a printing press proposed in this utility model; Figure 3 This is a schematic diagram of the moving plate structure of a high-efficiency automatic paper feeding device for a printing press proposed in this utility model. Figure 4 This is a schematic diagram of the fine-tuning mechanism of a high-efficiency automatic paper feeding device for a printing press proposed in this utility model; Figure 5 This is a schematic diagram of the servo motor structure of a high-efficiency automatic paper feeding device for printing presses proposed in this utility model.

[0024] Legend: 1. Base; 2. Fine-tuning mechanism; 201. Fine-tuning screw; 202. Transmission gear one; 203. Rotating shaft one; 204. Servo motor one; 205. Drive gear one; 206. Slide groove; 207. Guide rod; 3. Fixed rod one; 4. Roller; 5. First detection frame; 6. Photoelectric sensor one; 7. Servo motor two; 8. Ball screw; 9. Movable positioning baffle; 10. Second detection frame; 11. Photoelectric sensor two; 12. Moving plate; 13. Fixed rod two; 14. Rotating shaft two; 15. Transmission gear two; 16. Servo motor three; 17. Drive gear two; 18. Track; 19. Guide wheel; 20. Conveying device; 21. Fixed rod three; 22. Preload roller; 23. Limiting plate; 24. Limiting rod; 25. Limiting block. Detailed Implementation

[0025] 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.

[0026] Reference Figure 1 , Figure 3 and Figure 5This utility model provides an embodiment of a high-efficiency automatic paper feeding device for a printing press, which supports the entire device. A conveying assembly is located on the top of a base 1 to transport paper. A detection assembly is located on the front top of the base 1 to monitor the paper position. Two servo motors 7 are fixedly connected to the top of the base 1, providing power to ball screws 8. The output ends of both servo motors 7 are fixedly connected to ball screws 8, which drive movable positioning baffles 9 to move. Movable positioning baffles 9 are rotatably connected to the outer walls of both ball screws 8, providing lateral positioning for the paper. A movable plate 12 is located on the top of the base 1, serving as a load-bearing component. Fixed rods 13 are fixedly connected to the left and right ends of the top front side. Fixed rods 13 are used to install rotating shafts 14. The inner walls of the two fixed rods 13 are rotatably connected to the same rotating shaft 14. The rotating shaft 14 drives the guide wheel 19 to rotate. The outer walls of the two rotating shafts 14 are fixedly connected to the guide wheel 19 to prevent paper deviation and provide guidance. The far ends of the two rotating shafts 14 are fixedly connected to the transmission gears 15, which transmit power. Servo motors 16 are fixedly connected to the left and right ends of the bottom rear side of the moving plate 12. Servo motors 16 drive the drive gear 17 to rotate. The output ends of the two servo motors 16 are fixedly connected to the drive gear 17, which drives the transmission gear 15 to rotate. The second drive gear 17 is meshed with the corresponding second transmission gear 15 via the track 18, which transmits power. The detection assembly includes a first detection frame 5, the bottom of which is fixedly connected to the front top of the base 1. A photoelectric sensor 6 is fixedly connected to the bottom of the first detection frame 5, which monitors the position of the front end of the paper. Second detection frames 10 are fixedly connected to the left and right top ends of the base 1, and photoelectric sensors 11 are fixedly connected to the bottom of the second detection frames 10, which monitor the left and right position and width of the paper. The conveying assembly includes a conveying device 20, which directly conveys the paper. The bottom of the conveying device 20 is fixedly connected to the top of the base 1, and the conveying device 20 is fixed to the base 1. Fixed rods 3 are fixedly connected to the left and right ends of the front side of the device 1. Fixed rods 3 are used to install rollers 4. The inner walls of the two fixed rods 3 are rotatably connected to the same roller 4. The roller 4 assists the conveying device 20 to smoothly convey paper. The top of the left and right front ends of the conveying device 20 are fixedly connected to the bottom of the corresponding servo motors 7. The servo motors 7 drive the conveying device 20 to rotate. The output directions of the two servo motors 16 are the same, ensuring that the guide wheel 19 rotates in the same direction. The diameters of the two transmission gears 15 are larger than the diameters of the two drive gears 17, realizing speed reduction and torque increase to accurately drive the guide wheel 19. Limit rods 24 are slidably connected to the left and right sides of the inner walls of the two movable positioning baffles 9. The limit rods 24 restrict the movement direction of the movable positioning baffles 9.Both limiting rods 24 have fixed limiting plates 23 at their left and right ends. The limiting plates 23 prevent excessive movement of the movable positioning baffle 9. The bottoms of the multiple limiting plates 23 are fixedly connected to the top of the left and right ends of the front side of the conveying device 20, stabilizing the positions of the limiting rods 24 and the movable positioning baffle 9. A fine-tuning mechanism 2 is provided on the inner wall of the base 1, which can adjust the height of the guide wheels 19 for different paper thicknesses. Specifically, the conveying device 20 in the conveying assembly operates, and the roller 4 assists the conveying device 20 to make the paper conveying more stable. The photoelectric sensor 6 at the bottom of the first detection frame 5 monitors the position of the front end of the paper in real time to determine whether it has reached the designated position. The photoelectric sensor 11 at the bottom of the second detection frame 10 monitors the left and right position and width of the paper. Once the paper position and width deviate, the sensor quickly feeds back information. When the detection assembly reports the paper position deviation, the servo motor 7 precisely adjusts the rotation of the ball screw 8 according to the feedback. Since the movable positioning baffle 9 is rotatably connected to the ball screw 8, and the inner wall of the movable positioning baffle 9 has left and right sides... The limiting rod 24 slides, and the limiting plates 23 at both ends of the limiting rod 24 prevent it from moving excessively, thereby enabling the movable positioning baffle 9 to move accurately in the horizontal direction, pushing the paper to the correct position, ensuring that only one sheet of paper is accurately in the center of the conveying path each time. The guide wheel 19 on the moving plate 12 further ensures the conveying accuracy. The two servo motors 16 have the same output direction, driving the drive gear 17 to rotate. Because the diameter of the transmission gear 15 is larger than that of the drive gear 17, it achieves speed reduction and torque increase, accurately and smoothly driving the guide wheel 19 to rotate, preventing the paper from deviating, ensuring that the paper is correctly placed on the printing surface, and improving work efficiency and product quality.

[0027] Reference Figure 2 , Figure 3 and Figure 4The fine-tuning mechanism 2 includes a fine-tuning screw 201, which is used to adjust the height of the moving plate 12. The outer wall of the fine-tuning screw 201 is rotatably connected to the inner wall of the moving plate 12, so that the moving plate 12 can rise and fall with the rotation of the fine-tuning screw 201. A transmission gear 202 is fixedly connected to the bottom of the fine-tuning screw 201. The transmission gear 202 is used to transmit power from the servo motor 204. A rotating shaft 203 is fixedly connected to the bottom of the transmission gear 202. The rotating shaft 203 transmits the rotation of the transmission gear 202 to the fine-tuning screw 201. The bottom of the rotating shaft 203 is rotatably connected to the bottom side of the inner wall of the base 1, providing support and a base for rotation. A servo motor 204 is fixedly connected to the rear end of the bottom side of the base 1. Servo motor 204 serves as the power source for the fine-tuning mechanism 2. The output end of servo motor 204 is fixedly connected to drive gear 205, which transmits the rotational motion of servo motor 204. Drive gear 205 meshes with transmission gear 202, enabling power transmission from drive gear 205 to transmission gear 202. Guide rods 207 are fixedly connected to the bottom side of the inner wall of base 1, providing guidance for the movement of moving plate 12. Slide grooves 206 are provided around the perimeter of moving plate 12. The slide grooves 206 cooperate with the guide rods 207 to achieve smooth movement of moving plate 12. The inner walls of multiple slide grooves 206 are slidably connected to the outer walls of guide rods 207, ensuring that moving plate 12 moves along the direction of guide rods 207. Specifically, when servo motor 204 starts, the drive gear 205 at the output end of servo motor 204 rotates accordingly. Since drive gear 205 meshes with transmission gear 202, transmission gear 202 will also rotate. The bottom of transmission gear 202 is connected to shaft 203, which drives fine-tuning screw 201 to rotate. During the rotation of fine-tuning screw 201, the sliding groove 206 opened around the moving plate 12 is slidably connected to the guide rod 207 fixed around the bottom side of the inner wall of the base 1. The guide rod 207 plays a guiding role. This mechanism allows the movable plate 12 to be adjusted up and down only along the direction of the guide rod 207. The height of the guide wheel 19 on the movable plate 12 will change as the movable plate 12 rises and falls. When the paper is thick, the guide wheel 19 can be raised through the fine adjustment mechanism 2 to ensure that the paper passes through smoothly and is not excessively squeezed. When the paper is thin, the guide wheel 19 is lowered to keep the paper stable during the conveying process. This effectively improves the positioning and conveying accuracy when conveying paper of different thicknesses, avoids paper jams and deviations due to differences in paper thickness, and ensures the smooth progress of printing work.

[0028] Reference Figure 1 and Figure 4The top rear side of the base 1 is fixedly connected to the left and right ends of the fixed rod 21. The fixed rod 21 is used to support the pre-pressure roller 22. The inner wall of the two fixed rods 21 is rotatably connected to the same pre-pressure roller 22. The pre-pressure roller 22 pre-presses the paper that is conveyed, making it flatter and facilitating subsequent printing. The top of the outer wall of the multiple guide rods 207 is fixedly connected to two limit blocks 25. The limit blocks 25 provide a limit reference for the movement of the moving plate 12. One side of the multiple limit blocks 25 is respectively attached to the upper and lower sides of the moving plate 12 to prevent the moving plate 12 from excessive displacement when it moves on the guide rods 207, and to ensure the stability and accuracy of its movement. Specifically, the three fixing rods 21 on the left and right ends of the top rear side of the base 1 support the pre-pressure roller 22, allowing it to rotate and pre-press the paper. The pre-pressure roller 22 applies pressure to the paper to eliminate wrinkles and curls, ensuring the paper is flat, improving the subsequent printing quality, and avoiding misregistration caused by uneven paper. The limiting block 25 on the guide rod 207 is attached to the upper and lower sides of the moving plate 12. When the fine-tuning mechanism 2 drives the moving plate 12 to move along the guide rod 207, the limiting block 25 restricts its movement range, ensuring that the moving plate 12 moves stably and accurately, allowing the height adjustment of the guide wheel 19 to be more precise, adapting to different paper thicknesses, and preventing paper deviation and paper jams during transmission.

[0029] Working principle: When the device is running, the conveying device 20 in the conveying assembly operates, and the roller 4 assists the conveying device 20 to make the paper conveying more stable. The photoelectric sensor 6 at the bottom of the first detection frame 5 monitors the position of the front end of the paper in real time to determine whether it has reached the designated position. The photoelectric sensor 11 at the bottom of the second detection frame 10 monitors the left and right position and width of the paper. Once the paper position and width deviate, the sensor quickly feeds back information. When the detection assembly reports the paper position deviation, the servo motor 7 precisely adjusts the rotation of the ball screw 8 according to the feedback. Since the movable positioning baffle 9 is rotatably connected to the ball screw 8, and the inner wall of the movable positioning baffle 9... The left and right sides slide along the limiting rod 24. The limiting plates 23 at both ends of the limiting rod 24 prevent it from moving excessively, thereby realizing the precise horizontal movement of the movable positioning baffle 9, pushing the paper to the correct position, and ensuring that only one piece of paper is precisely in the center of the conveying path each time. The guide wheel 19 on the moving plate 12 further ensures the conveying accuracy. The two servo motors 16 output in the same direction, driving the active gear 17 to rotate. Because the diameter of the transmission gear 15 is larger than that of the active gear 17, it achieves speed reduction and torque increase, precisely and smoothly driving the guide wheel 19 to rotate, preventing the paper from deviating, ensuring that the paper is correctly placed on the printing surface, and improving work efficiency and product quality. Furthermore, when adjustments are needed for paper of different thicknesses, servo motor 204 starts, and the drive gear 205 at the output end of servo motor 204 rotates accordingly. Since drive gear 205 meshes with transmission gear 202, transmission gear 202 rotates as well. The bottom of transmission gear 202 is connected to shaft 203, which drives fine-tuning screw 201 to rotate. During the rotation of fine-tuning screw 201, the sliding grooves 206 around the moving plate 12 are slidably connected to guide rods 207 fixed around the bottom side of the inner wall of the base 1. 207 acts as a guide, allowing the moving plate 12 to be adjusted up and down only along the direction of the guide rod 207. The height of the guide wheel 19 on the moving plate 12 will change as the moving plate 12 rises and falls. When the paper is thick, the guide wheel 19 can be raised through the fine adjustment mechanism 2 to ensure that the paper passes through smoothly and is not excessively squeezed. When the paper is thin, the guide wheel 19 is lowered to keep the paper stable during the conveying process. This effectively improves the positioning and conveying accuracy when conveying paper of different thicknesses, avoids paper jams and deviations due to differences in paper thickness, and ensures the smooth progress of printing work.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency automatic paper feeding device for a printing press, comprising a base (1), characterized in that: A conveying assembly is provided on the top of the base (1), and a detection assembly is provided on the front side of the top of the base (1). Two servo motors (7) are fixedly connected to the top of the base (1). Ball screws (8) are fixedly connected to the output ends of the two servo motors (7). Movable positioning baffles (9) are rotatably connected to the outer walls of the two ball screws (8). A movable plate (12) is provided on the top of the base (1). Fixed rods (13) are fixedly connected to the left and right ends of the front side of the top of the movable plate (12). The inner walls of the two fixed rods (13) are rotatably connected to the same A rotating shaft (14) is fixedly connected to the outer wall of both rotating shafts (14), and a transmission gear (15) is fixedly connected to the opposite end of both rotating shafts (14). A servo motor (16) is fixedly connected to the left and right ends of the bottom rear side of the moving plate (12). A drive gear (17) is fixedly connected to the output end of both servo motors (16). The two drive gears (17) are respectively meshed with the corresponding transmission gears (15) through the track (18). A fine-tuning mechanism (2) is provided on the inner wall of the base (1).

2. The high-efficiency automatic paper feeding device for a printing press according to claim 1, characterized in that: The fine-tuning mechanism (2) includes a fine-tuning screw (201), the outer wall of which is rotatably connected to the inner wall of the moving plate (12), a transmission gear (202) is fixedly connected to the bottom of the fine-tuning screw (201), a rotating shaft (203) is fixedly connected to the bottom of the transmission gear (202), the bottom of the rotating shaft (203) is rotatably connected to the bottom side of the inner wall of the base (1), a servo motor (204) is fixedly connected to the rear end of the bottom side of the base (1), an active gear (205) is fixedly connected to the output end of the servo motor (204), the active gear (205) meshes with the transmission gear (202), guide rods (207) are fixedly connected to the bottom side of the inner wall of the base (1), and sliding grooves (206) are opened around the perimeter of the moving plate (12), with the inner walls of the multiple sliding grooves (206) respectively corresponding to the outer walls of the guide rods (207).

3. The high-efficiency automatic paper feeding device for a printing press according to claim 1, characterized in that: The detection assembly includes a first detection frame (5), the bottom of which is fixedly connected to the front top of the base (1), and a photoelectric sensor (6) is fixedly connected to the bottom of the first detection frame (5). A second detection frame (10) is fixedly connected to the left and right top ends of the base (1), and a photoelectric sensor (11) is fixedly connected to the bottom of the second detection frame (10).

4. The high-efficiency automatic paper feeding device for a printing press according to claim 1, characterized in that: The conveying assembly includes a conveying device (20), the bottom of which is fixedly connected to the top of the base (1). The left and right ends of the front side of the base (1) are fixedly connected to a first fixing rod (3). The inner walls of the two first fixing rods (3) are rotatably connected to the same roller (4). The top of the left and right front ends of the conveying device (20) are respectively fixedly connected to the bottom of the corresponding second servo motor (7).

5. The high-efficiency automatic paper feeding device for a printing press according to claim 1, characterized in that: The top rear side of the base (1) is fixedly connected to the left and right ends of the base (1), and the inner walls of the two fixed rods (21) are rotatably connected to the same pre-pressure roller (22).

6. The high-efficiency automatic paper feeding device for a printing press according to claim 1, characterized in that: The two servo motors (16) have the same output direction, and the diameters of the two transmission gears (15) are both larger than the diameters of the two drive gears (17).

7. The high-efficiency automatic paper feeding device for a printing press according to claim 1, characterized in that: The inner walls of the two movable positioning baffles (9) are slidably connected to the left and right sides of the limit rods (24), and the left and right ends of the two limit rods (24) are fixedly connected to the limit plates (23). The bottoms of the multiple limit plates (23) are respectively fixedly connected to the top of the left and right ends of the front side of the conveying device (20).

8. The high-efficiency automatic paper feeding device for a printing press according to claim 2, characterized in that: Two limiting blocks (25) are fixedly connected to the top of the outer wall of each of the multiple guide rods (207), and one side of each of the multiple limiting blocks (25) is respectively attached to the upper and lower sides of the moving plate (12).

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