Printing cylinder transmission mechanism of plane screen printing machine

Abstract

The utility model belongs to the technical field of screen printing machines, and particularly relates to a printing cylinder transmission mechanism of a plane screen printing machine, which comprises a machine body used on the screen printing machine, a printing cylinder rotationally connected to the inner walls of the two sides of the machine body, and a screen printing net arranged in the machine body in a sliding manner, an intermittent transmission mechanism is arranged between the machine body and the printing roller, and a front-back reciprocating motion mechanism is arranged between the silk screen and the machine body. The intermittent stopping device is reasonable in structural design, intermittent stopping of the printing cylinder can be achieved through transmission of the semicircular gear, the incomplete gear, the rack, the moving frame and the driving gear, resetting of a silk screen is facilitated, the transmission structure of the printing cylinder is simpler in design, production cost is reduced, later overhaul and maintenance are facilitated, and production efficiency is improved. And through the arrangement of a damping shaft and a damping ring, the printing roller can be fixed, the cover plate can be conveniently disassembled, assembled and opened, and therefore parts in the machine box can be conveniently overhauled and maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of screen printing machines, in particular to a printing roller transmission mechanism of a flat screen printing machine. Background Art

[0002] A screen printing machine is a machine for printing text and images. It is a type of printing machine. It is a more representative printing device among stencil printing machines. The screen printing machine is mainly composed of a transmission mechanism, a printing plate device, a printing device, a supporting device, i.e., a printing platform, a plate alignment mechanism, a drying device, and an electrical control device. When the screen printing machine is working, the printing cylinder rotates together with the printing cylinder by clamping the printing paper through the clamping claws. The horizontal movement speed of the screen frame placed above the printing cylinder is the same as the linear speed of the printing cylinder, so as to achieve the relative fit between the screen and the printing paper. Under the action of the scraper, the ink above the screen passes through the printing holes opened above the screen to the top of the printing paper, so as to achieve the printing of the printing paper. After rotating one circle, the printing cylinder needs to stop briefly to wait for the next printing paper to be delivered and the screen frame to return to the initial position. After searching: Patent No. CN216733447U is a printing roller transmission mechanism of a flat screen printing machine, which relates to the technical field of screen printing machines, and includes a frame, a printing shaft rotatably mounted on the frame, a printing roller fixedly mounted on the printing shaft, a clamping claw arranged on the printing roller, and a screen frame slidably mounted on the frame, a first gear is fixedly mounted on the printing shaft, an avoidance groove is provided on the outer peripheral wall of the first gear, a driving mechanism for driving the first gear to rotate and driving the screen frame to reciprocate is installed on the frame, and a stopping mechanism for controlling the rotation of the first gear is provided on the frame.

[0003] However, the printing roller transmission mechanism of the flat screen printing machine mentioned above still has some shortcomings. Although the problem of rolling positioning is solved, the printing roller transmission mechanism in the above patent uses many parts, resulting in an overly complicated structure, which not only increases the production cost, but also brings troubles to the subsequent inspection and maintenance once it is damaged. Therefore, we propose a printing roller transmission mechanism of a flat screen printing machine to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings and proposes a printing roller transmission mechanism for a flat screen printing machine.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A printing roller transmission mechanism of a flat screen printing machine comprises a body used on the screen printing machine, a printing roller rotatably connected to the inner walls on both sides of the body, and a silk screen slidably arranged in the body, an intermittent transmission mechanism is arranged between the body and the printing roller, a front-and-reciprocating motion mechanism is arranged between the silk screen and the body, one side of the body is fixedly connected to a chassis, one side of the chassis is rotatably connected to a cover plate, an opening and closing mechanism is arranged between the cover plate and the chassis, and a clamping claw is arranged on the top of the printing roller.

[0007] Preferably, the forward and backward reciprocating motion mechanism includes a servo motor whose outer side is fixedly sleeved on the silk screen frame and fixedly connected to one side of the machine body, a driving shaft is fixedly connected to the output shaft of the servo motor, a semicircular gear is provided on the outer side of the driving shaft, slides are fixedly connected on both sides of the silk screen frame, a moving frame is fixedly connected to the top of the left slide, racks are fixedly connected on the top inner wall and the bottom inner wall of the moving frame, and the semicircular gears are alternately meshed with the two racks.

[0008] Preferably, rectangular openings are provided on both sides of the machine body, and two slide plates are slidably mounted in the corresponding rectangular openings respectively.

[0009] Preferably, a mounting groove is provided on one side of the machine body, and the servo motor is fixedly connected in the mounting groove.

[0010] Preferably, the intermittent transmission mechanism includes a damping shaft connected to the inner walls on both sides of the machine body for damping rotation and an incomplete gear fixedly connected to one end of the driving shaft. The printing roller is fixedly sleeved on the outside of the damping shaft, and one end of the damping shaft is fixedly connected to a driving gear, which meshes with the incomplete gear.

[0011] Preferably, damping rings are fixedly connected to both sides of the machine body, and the damping shaft is rotatably sleeved between the two damping rings.

[0012] Preferably, the opening and closing mechanism includes two right ear plates fixedly connected to the front side of the chassis and two left ear plates fixedly connected to the front side of the cover plate, and the left ear plate and the right ear plate located on the same horizontal plane are fixedly connected.

[0013] Preferably, a same bolt is threadedly connected between the left ear plate and the right ear plate located on the same horizontal plane, and the cover plate is fixedly mounted on one side of the chassis by the bolts.

[0014] In the utility model, a printing roller transmission mechanism of a flat screen printing machine is described, the servo motor drives the rotation of the driving shaft, the driving shaft drives the rotation of the incomplete gear, the incomplete gear has a tooth angle of degrees, that is, when the incomplete gear rotates half a circle, it can just drive the driving gear to rotate one circle, and the driving gear rotates one circle, which will drive the printing roller to rotate one circle and drive the movement of the paper to be screen-printed. When it rotates to a position without teeth, it does not mesh with the driving gear, and thus cannot drive the driving gear, the damping shaft and the printing roller to rotate. At this time, the damping shaft and the printing roller can be fixed under the damping of the damping shaft and the damping ring, and then the printing roller can be driven to rotate one circle intermittently;

[0015] In the utility model, the printing roller transmission mechanism of the flat screen printing machine described in the utility model drives the rotation of the semicircular gear at the same time. Since the semicircular gear is alternately meshed with the two racks, it will drive the moving frame, the slide plate, the screen frame and the screen to move back and forth. Therefore, when the driving shaft rotates half a circle, it will drive the screen to move forward. When it continues to rotate the second half circle, it will drive the screen to move backward and reset. Then, when the printing roller stops, the screen can be moved backward and reset to wait for the next screen printing work on the paper. This article can protect the components of the printing roller transmission mechanism through the setting of the chassis and the cover plate. When damaged, the bolts can be unscrewed to make the left and right ear plates unfixed. At this time, the cover plate can be opened to inspect and maintain the components in the chassis, making the inspection and maintenance more convenient.

[0016] The utility model has a reasonable structural design. Through the transmission of the semicircular gear, the incomplete gear, the rack, the movable frame and the driving gear, the printing roller can be intermittently stopped so as to reset the screen printing network, so that the transmission structure design of the printing roller is simpler, the production cost is reduced, and it is convenient for later inspection and maintenance. Moreover, through the arrangement of the damping shaft and the damping ring, the printing roller can be fixed, and it is convenient to disassemble and open the cover plate, thereby facilitating the inspection and maintenance of the components in the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a printing roller transmission mechanism of a flat screen printing machine proposed by the utility model;

[0018] Figure 2 It is a cross-sectional view of a printing cylinder transmission mechanism of a flat screen printing machine proposed by the utility model;

[0019] Figure 3 A three-dimensional diagram of a moving frame, a semicircular gear and a rack of a printing cylinder transmission mechanism of a flat screen printing machine proposed by the utility model;

[0020] Figure 4The utility model is a structural schematic diagram of part A of a printing roller transmission mechanism of a flat screen printing machine.

[0021] In the figure: 1. body; 2. chassis; 3. damping shaft; 4. damping ring; 5. slide plate; 6. rectangular opening; 7. screen frame; 8. screen; 9. printing roller; 10. clamping jaw; 11. servo motor; 12. driving shaft; 13. semicircular gear; 14. rack; 15. moving frame; 16. incomplete gear; 17. driving gear; 18. cover plate; 19. left ear plate; 20. right ear plate; 21. bolt. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-4 A printing roller transmission mechanism of a flat screen printing machine includes a body 1 used on the screen printing machine, a printing roller 9 rotatably connected to the inner walls on both sides of the body 1, and a screen printing screen 8 slidably arranged in the body 1, an intermittent transmission mechanism is arranged between the body 1 and the printing roller 9, a front-and-reciprocating motion mechanism is arranged between the screen printing screen 8 and the body 1, one side of the body 1 is fixedly connected to a chassis 2, one side of the chassis 2 is rotatably connected to a cover plate 18, an opening and closing mechanism is arranged between the cover plate 18 and the chassis 2, and a clamping claw 10 is arranged on the top of the printing roller 9.

[0024] Furthermore, the forward and backward reciprocating motion mechanism includes a servo motor 11 fixedly sleeved on the outer side of the screen printing screen 8 and fixedly connected to the screen printing screen frame 7 and one side of the machine body 1, a drive shaft 12 is fixedly connected to the output shaft of the servo motor 11, a semicircular gear 13 is fixedly sleeved on the outer side of the drive shaft 12, a slide plate 5 is fixedly connected to both sides of the screen printing screen frame 7, a moving frame 15 is fixedly connected to the top of the left slide plate 5, a rack 14 is fixedly connected to the top inner wall and the bottom inner wall of the moving frame 15, and the semicircular gear 13 is alternately meshed with the two racks 14 The servo motor 11 drives the rotation of the driving shaft 12, and the driving shaft 12 drives the rotation of the semicircular gear 13. Since the semicircular gear 13 is alternately meshed with the two racks 14, it will drive the moving frame 15, the slide plate 5, the screen frame 7 and the screen 8 to reciprocate back and forth. When the driving shaft 12 rotates half a circle, it will drive the screen 8 to move forward. When it continues to rotate the second half circle, it will drive the screen 8 to move backward and reset. When the printing roller 9 stops, the screen 8 can move backward and reset, waiting for the next screen printing work on the paper.

[0025] Furthermore, rectangular openings 6 are provided on both sides of the machine body 1, and the two slide plates 5 are slidably mounted in the corresponding rectangular openings 6, respectively, so as to facilitate the guidance of the slide plates 5 and make their movement more stable.

[0026] Furthermore, a mounting groove is provided on one side of the machine body 1 , and the servo motor 11 is fixedly connected in the mounting groove, which is conducive to the installation and fixation of the servo motor 11 .

[0027] Furthermore, the intermittent transmission mechanism includes a damping shaft 3 connected to the inner walls of both sides of the machine body 1 and an incomplete gear 16 fixedly connected to one end of the driving shaft 12. The printing roller 9 is fixedly sleeved on the outer side of the damping shaft 3. One end of the damping shaft 3 is fixedly connected to a driving gear 17. The driving gear 17 meshes with the incomplete gear 16. Both sides of the machine body 1 are fixedly connected to damping rings 4. The damping shaft 3 is rotatably sleeved between the two damping rings 4. The servo motor 11 drives the rotation of the driving shaft 12. The driving shaft 12 drives the rotation of the incomplete gear 16. The incomplete gear The tooth angle of the wheel 16 is 180 degrees, that is, when the incomplete gear 16 rotates half a circle, it can just drive the driving gear 17 to rotate one circle. The driving gear 17 rotates one circle, which will drive the printing roller 9 to rotate one circle and drive the movement of the paper to be screen-printed. When it rotates to a position without teeth, it will not mesh with the driving gear 17, and thus cannot drive the driving gear 17, the damping shaft 3 and the printing roller 9 to rotate. At this time, the damping shaft 3 and the printing roller 9 can be fixed through the damping of the damping shaft 3 and the damping ring 4, and then the printing roller 9 can be driven intermittently to rotate one circle.

[0028] Furthermore, the opening and closing mechanism includes two right ear plates 20 fixedly connected to the front side of the chassis 2 and two left ear plates 19 fixedly connected to the front side of the cover plate 18. The left ear plate 19 and the right ear plate 20 located on the same horizontal plane are fixedly connected, and the left ear plate 19 and the right ear plate 20 located on the same horizontal plane are threadedly connected with the same bolt 21. The cover plate 18 is fixedly installed on one side of the chassis 2 by the bolt 21. Through the arrangement of the chassis 2 and the cover plate 18, the components of the printing roller transmission mechanism can be protected. When damaged, the bolt 21 can be unscrewed to make the left and right ear plates unfixed. At this time, the cover plate 18 can be opened to inspect and maintain the components in the chassis 2, making the inspection and maintenance more convenient.

[0029] In the utility model, when in use, the servo motor 11 drives the rotation of the driving shaft 12, and the driving shaft 12 drives the rotation of the incomplete gear 16. The tooth angle of the incomplete gear 16 is 180 degrees, that is, when the incomplete gear 16 rotates half a circle, it can just drive the driving gear 17 to rotate one circle. The driving gear 17 rotates one circle, which will drive the printing roller 9 to rotate one circle and drive the movement of the paper to be screen-printed. When it rotates to a position without teeth, it does not mesh with the driving gear 17, and thus cannot drive the driving gear 17, the damping shaft 3 and the printing roller 9 to rotate. At this time, the damping shaft 3 and the printing roller 9 can be fixed under the damping of the damping shaft 3 and the damping ring 4, and then the printing roller 9 can be driven to rotate one circle intermittently. At the same time, the driving shaft 12 drives half a circle. The rotation of the circular gear 13, because the semicircular gear 13 is alternately meshed with the two racks 14, will drive the moving frame 15, the slide plate 5, the screen frame 7 and the screen 8 to reciprocate forward and backward. When the driving shaft 12 rotates half a circle, it will drive the screen 8 to move forward. When it continues to rotate the second half circle, it will drive the screen 8 to move backward and reset. Then, when the printing roller 9 stops, the screen 8 can be moved backward and reset, waiting for the next screen printing on the paper. In this article, the components of the printing roller transmission mechanism can be protected by the arrangement of the chassis 2 and the cover 18. When damaged, the bolts 21 can be unscrewed to make the left and right ear plates unfixed. At this time, the cover 18 can be opened to inspect and maintain the components in the chassis 2, making the inspection and maintenance more convenient.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A printing cylinder transmission mechanism of a flat screen printing machine, characterized in that: The invention comprises a body (1) for a screen printing machine, a printing roller (9) rotatably connected to the inner walls of both sides of the body (1), and a screen printing screen (8) slidably arranged in the body (1); an intermittent transmission mechanism is arranged between the body (1) and the printing roller (9); a forward and backward reciprocating mechanism is arranged between the screen printing screen (8) and the body (1); one side of the body (1) is fixedly connected to a chassis (2); one side of the chassis (2) is rotatably connected to a cover plate (18); an opening and closing mechanism is arranged between the cover plate (18) and the chassis (2); and a clamping claw (10) is arranged on the top of the printing roller (9).

2. The printing cylinder transmission mechanism of a flat screen printing machine according to claim 1, characterized in that: The forward and backward reciprocating motion mechanism comprises a servo motor (11) fixedly sleeved on the outer side of the screen printing screen (8) and fixedly connected to one side of the machine body (1); a driving shaft (12) is fixedly connected to the output shaft of the servo motor (11); a semicircular gear (13) is fixedly sleeved on the outer side of the driving shaft (12); slide plates (5) are fixedly connected to both sides of the screen printing screen frame (7); a moving frame (15) is fixedly connected to the top of the left slide plate (5); racks (14) are fixedly connected to the top inner wall and the bottom inner wall of the moving frame (15); and the semicircular gear (13) is alternately meshed with the two racks (14).

3. The printing cylinder transmission mechanism of a flat screen printing machine according to claim 2, characterized in that: Rectangular openings (6) are provided on both sides of the machine body (1), and two slide plates (5) are slidably mounted in the corresponding rectangular openings (6).

4. The printing cylinder transmission mechanism of a flat screen printing machine according to claim 2, characterized in that: A mounting groove is provided on one side of the machine body (1), and the servo motor (11) is fixedly connected in the mounting groove.

5. The printing cylinder transmission mechanism of a flat screen printing machine according to claim 2, characterized in that: The intermittent transmission mechanism comprises a damping shaft (3) connected to the inner walls of both sides of the machine body (1) in a damping rotation manner and an incomplete gear (16) fixedly connected to one end of a driving shaft (12); the printing roller (9) is fixedly sleeved on the outer side of the damping shaft (3); one end of the damping shaft (3) is fixedly connected to a driving gear (17); the driving gear (17) is meshed with the incomplete gear (16).

6. The printing cylinder transmission mechanism of a flat screen printing machine according to claim 5, characterized in that: Damping rings (4) are fixedly connected to both sides of the machine body (1), and the damping shaft (3) is rotatably sleeved between the two damping rings (4).

7. The printing cylinder transmission mechanism of a flat screen printing machine according to claim 1, characterized in that: The opening and closing mechanism comprises two right ear plates (20) fixedly connected to the front side of the chassis (2) and two left ear plates (19) fixedly connected to the front side of the cover plate (18), wherein the left ear plates (19) and the right ear plates (20) located on the same horizontal plane are fixedly connected.

8. The printing cylinder transmission mechanism of a flat screen printing machine according to claim 7, characterized in that: A bolt (21) is threadedly connected between the left ear plate (19) and the right ear plate (20) located on the same horizontal plane, and the cover plate (18) is fixedly mounted on one side of the chassis (2) by the bolt (21).

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