Top shaft transmission structure of printing machine

Abstract

The utility model discloses a top shaft transmission structure of a printing machine, which comprises a first side plate and a second side plate which are arranged at an interval, a movable top shaft which stretches back and forth is arranged on a first mounting seat, a second material ejection block is arranged at the front end of the movable top shaft, and a plate cylinder is arranged between the first material ejection block and the second material ejection block. A rotatable square shaft is arranged between the first side plate and the second side plate, a first gear and a second gear are arranged on the square shaft, a third gear is arranged at the tail end of the fixed top shaft and is in meshing transmission with the second gear, a guide hole matched with the square shaft is formed in the first gear, and the first gear can slide along the square shaft. A fourth gear is arranged at the tail end of the movable jacking shaft and is in meshing transmission with the first gear all the time, and the square shaft is driven by a motor. The two ends of the plate cylinder are stressed and rotated at the same time, the rotating speed is consistent, stress of the plate cylinder is more balanced, movement of the plate cylinder is effectively reduced, the printing quality is improved, and the structure is reasonable and reliable.

Description

Technical Field

[0001] The utility model relates to a transmission component on a gravure printing machine, in particular to a top shaft transmission structure of the printing machine. Background Art

[0002] The plate roller of the gravure printing machine is usually in direct contact with the image printing material, so before the plate roller comes out of the ink box and contacts the printing material, it must be scraped off with a scraper. The ink on the roller surface is then transferred to the substrate through the pressure of the embossing roller, the printing material and the capillary action.

[0003] The gravure printing machine is set up in units according to the required number of colors. Each unit has a plate cylinder and an impression cylinder. In order to increase the printing pressure, some are equipped with two impression cylinders. The plate cylinders between each unit are driven by a top shaft, that is, the two ends of the plate cylinder are respectively equipped with a top shaft, and the top shafts are connected in series by chains for synchronous transmission. After the top shafts are connected by chain transmission, the aisles between the units are blocked, resulting in the efficiency of personnel passage, which is not very reasonable in structure.

[0004] At the same time, gravure printing machines are usually roller printing machines, which use continuous printing on rollers. Therefore, the stability of the plate roller determines the quality of image printing. The traditional top shaft is divided into a movable top shaft and a fixed top shaft. The fixed top shaft rotates freely through the bearing, and the plate cylinder is only driven on one side by the movable top shaft. This will cause the movable top shaft to bear all the resistance during work, making the driving force of the plate cylinder unbalanced, which can easily cause wear and tear at the joint between the plate cylinder and the movable top shaft and cause stringing, greatly affecting the transmission of the substrate and thus affecting the printing quality. Utility Model Content

[0005] In order to solve the above problems, the purpose of the utility model is to provide a top shaft transmission structure of a printing press with a reasonable structure and balanced force on the plate cylinder.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a top shaft transmission structure of a printing press, comprising a first side plate and a second side plate arranged at an interval, a first mounting seat is installed on the first side plate, a second mounting seat is installed on the second side plate, a rotatable fixed top shaft is installed on the second mounting seat, a first top material block is installed on the front end portion of the fixed top shaft, a movable top shaft that can be telescoped forward and backward is arranged on the first mounting seat, a second top material block is arranged at the front end of the movable top shaft, a printing plate cylinder is arranged between the first top material block and the second top material block, a rotatable square shaft is arranged between the first side plate and the second side plate, that is, the square shaft is rotatably mounted on the first side plate and the second side plate through a square hole bearing, a first gear and a second gear are arranged on the square shaft, a third gear is arranged at the tail end of the fixed top shaft, the third gear is meshed with the second gear for transmission, a guide hole matched with the square shaft is arranged on the first gear, the first gear can slide along the square shaft, a fourth gear is arranged at the tail end of the movable top shaft, the fourth gear is always meshed with the first gear for transmission, and the square shaft is driven by a motor.

[0007] The first mounting seat is provided with a guide rail, and the guide rail is provided with a slide sliding along the guide rail. A cylinder is installed at the bottom of the first mounting seat, and the piston rod of the cylinder is connected to the slide. A square frame is connected to the slide. A guide cylinder is connected to one side of the square frame. A guide sleeve for the guide cylinder to pass through is also arranged on the first mounting seat. The movable top shaft is rotatably mounted in the guide cylinder. The other side of the square frame is connected to a limit box. The fourth gear and the first gear are arranged in the limit box. The tail end of the movable top shaft extends into the limit box and is connected to the fourth gear in transmission. The square shaft passes through the limit box and cooperates with the first gear.

[0008] The motor is mounted on the first side plate, a fifth gear is arranged on the output shaft of the motor, a sixth gear is arranged on the square shaft, and the fifth gear and the sixth gear are meshed for transmission.

[0009] The beneficial effect of the utility model is that after the motor drives the square shaft to rotate, it can simultaneously drive the rotation of the movable top shaft and the fixed top shaft, so that the two ends of the printing plate cylinder are simultaneously subjected to force to rotate with the same speed, so that the force on the printing plate cylinder is more balanced, effectively reducing the string movement of the printing plate cylinder, improving the printing quality, and the structure is reasonable and reliable.

[0010] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model. DETAILED DESCRIPTION

[0012] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0013] like Figure 1 As shown, this embodiment discloses a top shaft transmission structure of a printing press, including a first side plate 1 and a second side plate 2 arranged at intervals, a first mounting seat 3 is installed on the first side plate 1, a second mounting seat 4 is installed on the second side plate 2, a rotatable fixed top shaft 5 is installed on the second mounting seat 4, a first top material block 51 is installed on the front end of the fixed top shaft 5, a movable top shaft 6 that can be telescopic forward and backward is arranged on the first mounting seat 3, a second top material block 61 is arranged at the front end of the movable top shaft 6, a printing plate cylinder 7 is installed between the first top material block 51 and the second top material block 61, and a plate cylinder 7 is installed between the first side plate 1 and the second side plate 2. There is a rotatable square shaft 8, that is, the square shaft 8 is rotatably mounted on the first side plate 1 and the second side plate 2 through a square hole bearing, and a first gear 10 and a second gear 20 are arranged on the square shaft 8. The tail end of the fixed top shaft 5 is arranged with a third gear 30, and the third gear 30 is meshed with the second gear 20 for transmission. The first gear 10 is provided with a guide hole matched with the square shaft 8, and the first gear 10 can slide along the square shaft 8. The tail end of the movable top shaft 6 is provided with a fourth gear 40, and the fourth gear 40 is always meshed with the first gear 10 for transmission. The square shaft 8 is driven by a motor 9, and the motor 9 is a servo motor 9.

[0014] A guide rail 31 is provided on the first mounting seat 3, and a slide plate 32 sliding along the guide rail 31 is provided. A cylinder 33 is installed at the bottom of the first mounting seat 3, and the piston rod of the cylinder 33 is connected to the slide plate 32. A square frame 34 is connected to the slide plate 32, and a guide cylinder 35 is connected to one side of the square frame 34. A guide sleeve 36 for the guide cylinder 35 to pass through is also provided on the first mounting seat 3. The movable top shaft 6 is rotatably installed in the guide cylinder 35, and the other side of the square frame 34 is connected to a limit box 37. The fourth gear 40 and the first gear 10 are arranged in the limit box body 37, the tail end of the movable top shaft 6 extends into the limit box body 37 and is connected to the fourth gear 40, the square shaft 8 passes through the limit box body 37 and cooperates with the first gear 10, so that the fourth gear 40 is always meshed with the first gear 10 for transmission, and the fourth gear 40 can slide along the square shaft 8 while the cylinder 33 drives the movable top shaft 6 to extend and retract. Since the cross-section of the square shaft 8 is square, the fourth gear 40 can still achieve transmission with the square shaft 8 after sliding.

[0015] The motor 9 is mounted on the first side plate 1, the output shaft of the motor 9 is provided with a fifth gear 50, the square shaft 8 is provided with a sixth gear 60, and the fifth gear 50 and the sixth gear 60 are meshed for transmission. The motor 9 can achieve transmission with the square shaft 8 through this structure, and the structure is reliable and stable.

[0016] The beneficial effect of the utility model is that after the motor 9 drives the square shaft 8 to rotate, it can simultaneously drive the rotation of the movable top shaft 6 and the fixed top shaft 5, so that the two ends of the printing plate cylinder 7 are simultaneously rotated with force and the speed is consistent, so that the force on the printing plate cylinder 7 is more balanced, effectively reducing the string movement of the printing plate cylinder 7, and improving the printing quality. The structure is reasonable and reliable, and the printing plate cylinders in each group of units can operate independently, reducing the use of chains and facilitating the passage of personnel.

[0017] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0018] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A top shaft transmission structure of a printing press, comprising a first side plate and a second side plate arranged at intervals, a first mounting seat being mounted on the first side plate, a second mounting seat being mounted on the second side plate, a rotatable fixed top shaft being mounted on the second mounting seat, a first top material block being mounted on the front end of the fixed top shaft, a movable top shaft that can be telescoped forward and backward being mounted on the first mounting seat, a second top material block being disposed at the front end of the movable top shaft, and a printing plate cylinder being mounted between the first top material block and the second top material block, characterized in that: A rotatable square shaft is provided between the first side plate and the second side plate, and a first gear and a second gear are arranged on the square shaft. A third gear is provided at the tail end of the fixed top shaft, and the third gear is meshed with the second gear for transmission. A guide hole matched with the square shaft is provided on the first gear, and the first gear can slide along the square shaft. A fourth gear is provided at the tail end of the movable top shaft, and the fourth gear is always meshed with the first gear for transmission. The square shaft is driven by a motor.

2. The top shaft transmission structure of the printing press according to claim 1, characterized in that: The first mounting seat is provided with a guide rail, and the guide rail is provided with a slide sliding along the guide rail. A cylinder is installed at the bottom of the first mounting seat, and the piston rod of the cylinder is connected to the slide. A square frame is connected to the slide. A guide cylinder is connected to one side of the square frame. A guide sleeve for the guide cylinder to pass through is also arranged on the first mounting seat. The movable top shaft is rotatably mounted in the guide cylinder. The other side of the square frame is connected to a limit box. The fourth gear and the first gear are arranged in the limit box. The tail end of the movable top shaft extends into the limit box and is transmission-connected with the fourth gear. The square shaft passes through the limit box and cooperates with the first gear.

3. The top shaft transmission structure of the printing press according to claim 1, characterized in that: The motor is mounted on the first side plate, a fifth gear is arranged on the output shaft of the motor, a sixth gear is arranged on the square shaft, and the fifth gear and the sixth gear are meshed for transmission.

Images