CN114379201A - Printing cylinder transmission mechanism of plane screen printing machine - Google Patents

Abstract

The utility model relates to a plane screen printing machine printing cylinder drive mechanism, relate to screen printing machine's technical field, which comprises a frame, rotate the printing pivot of installing in the frame, fixed mounting is at the epaxial printing cylinder of printing, clamping jaw and the silk screen printing screen frame of slidable mounting in the frame of setting on the printing cylinder, fixed mounting has first gear in the printing pivot, the periphery wall of first gear has been seted up and has been dodged the groove, install the first gear of drive and rotate and drive silk screen printing screen frame reciprocating motion's actuating mechanism in the frame, and be provided with the first gear pivoted detent mechanism of control in the frame. This application utilizes stop gear and the cooperation of dodging the groove to realize the drive to printing cylinder through utilizing the first gear of actuating mechanism drive, and the problem of cylinder location inaccuracy is solved to the engaged state of control actuating mechanism and first gear, improves the stability of printing cylinder actuating mechanism work.

Description

Printing cylinder transmission mechanism of plane screen printing machine

Technical Field

The application relates to the technical field of screen printing machines, in particular to a transmission mechanism of a printing cylinder of a plane screen printing machine.

Background

The screen printer is a machine for printing characters and images, and belongs to one of printing machines, and belongs to a relatively representative printing device of a stencil printing machine. The screen printing machine is mainly composed of a transmission mechanism, a printing plate device, a printing device, a supporting device, namely a printing platform, a plate aligning mechanism, a drying device and an electric control device.

When the screen printing machine works, the printing cylinder clamps printing paper through the clamping jaw and rotates together with the printing cylinder, the horizontal moving speed of a screen printing frame arranged above the printing cylinder is the same as the linear speed of the printing cylinder, so that the screen printing and the printing paper are relatively attached, and under the action of the scraper plate, ink above the screen printing penetrates through printing holes formed in the screen printing top and is transmitted to the printing paper top, so that printing on the printing paper is realized. The printing cylinder needs a short dwell time after one revolution, waiting for the next sheet to be delivered and the screen frame to return to the initial position.

In view of the above-mentioned related art, the inventor believes that the screen printing machine in the related art has a problem of inaccurate positioning when the cylinder is stopped.

Disclosure of Invention

In order to solve the problem that the cylinder location is inaccurate, the application provides a plane screen printing machine printing cylinder drive mechanism.

The application provides a plane screen printing machine printing cylinder drive mechanism adopts following technical scheme:

the utility model provides a plane screen printing machine printing cylinder drive mechanism, includes the frame, rotates and installs printing pivot, fixed mounting in the frame are in epaxial printing cylinder of printing, setting are in clamping jaw and slidable mounting on the printing cylinder are in silk screen printing screen frame in the frame, fixed mounting has first gear in the printing pivot, the periphery wall of first gear has been seted up and has been dodged the groove, install the first gear of drive and drive silk screen printing screen frame reciprocating motion's actuating mechanism in the frame, just be provided with the first gear revolve stop gear of control in the frame.

By adopting the technical scheme, when the printing cylinder of the printing machine works, the printing paper is delivered to the printing cylinder and clamped by the clamping jaw, and the driving mechanism drives the first gear to rotate, so that the printing cylinder which is coaxial with the first gear rotates. The stop mechanism controls the position of the avoidance groove to control the stop and the movement of the first gear. The avoidance groove of the first gear realizes the non-meshing state of the first gear and the stop mechanism, so that the first gear is static. The stop mechanism rotates the first gear so that the first gear is meshed with the driving mechanism, and therefore secondary rotation is achieved. Through seting up on first gear and dodging the groove, realize the stagnation of cylinder, make the rotational position of control printing pivot (being the cylinder) comparatively accurate, at high speed operation in-process reliable and stable.

The driving mechanism drives the first gear to rotate so as to drive the printing roller, the locking mechanism is matched with the avoidance groove, the meshing state of the driving mechanism and the first gear is controlled, the problem that the structure of the printing roller driving mechanism is complex is solved, and the working stability of the printing roller driving mechanism is improved.

Optionally, the driving mechanism includes a driving motor fixedly mounted on the frame, a crankshaft connected to the driving motor, a rocker eccentrically hinged to the crankshaft, an arc-shaped rack rotatably connected to the rocker and far away from an end of the crankshaft, a driving shaft rotatably mounted on the frame, and a second gear and a third gear fixedly mounted on the driving shaft, the second gear is meshed with the first gear, the third gear is meshed with the arc-shaped rack, and the arc-shaped rack is hinged to the frame.

By adopting the technical scheme, when the driving mechanism works, the driving motor drives the crankshaft to rotate, the crankshaft drives the arc-shaped rack connected with the crankshaft in a rotating mode to swing through the rocker, the arc-shaped rack drives the third gear to move forward and backward, the third gear drives the second gear to move forward and backward through the driving shaft, and finally rolling of the printing roller is achieved through meshing of the first gear and the second gear.

Optionally, the stopping mechanism includes a stopping swing rod rotatably connected to the frame, a stopping groove formed in the stopping swing rod, a stopping block fixedly mounted on the first gear, and a driving assembly for driving the stopping swing rod to rotate, and the stopping block is in clamping fit with the stopping groove.

By adopting the technical scheme, the stop swing rod stops the first gear through the stop block, so that the first gear is prevented from being continuously meshed with the second gear due to the rotation inertia of the first gear, and the stop groove is close to the second gear, so that the stop effect of installing the printing cylinder is ensured; the stop swing rod continuously swings back, so that the second gear is meshed with the first gear to continuously rotate.

Optionally, the driving assembly includes a first cam and a second cam fixedly mounted on the crankshaft, a transmission rod clamped between the first cam and the second cam, a first fixing block and a second fixing block mounted on two side walls of the transmission rod, the first cam is abutted to the first fixing block, the second cam is abutted to the second fixing block, the transmission rod is slidably connected to the crankshaft, and an end of the transmission rod is rotatably connected to the stop swing rod.

By adopting the technical scheme, when the driving assembly works, the first cam and the second cam rotate together under the action of the crankshaft to respectively push the first fixing block and the second fixing block arranged on the transmission rod, so that the transmission rod slides along the length direction of the transmission rod, finally, power is transmitted to the stopping swing rod to realize the back-and-forth swing of the stopping swing rod, and the driving assembly is matched with the stopping assembly to realize the intermittent pause and the unidirectional rotation of the printing roller.

Optionally, the outer walls of the first fixed block and the second fixed block are provided with rollers.

Through adopting above-mentioned technical scheme, the gyro wheel can be followed first fixed block or second fixed block and taken place to rotate, and the rotation of gyro wheel effectively reduces first cam and first fixed block, or the friction of second cam and second fixed block, has effectively reduced the wearing and tearing of first cam or second cam, has improved the life of first cam or second cam.

Optionally, an adjusting groove is formed in the side wall of the transmission rod, the first fixing block is slidably mounted in the adjusting groove, an adjusting screw penetrates through the first fixing block, and the adjusting screw penetrates through the first fixing block and is fixedly connected with the transmission rod.

By adopting the technical scheme, the movement limit position of the transmission rod can be adjusted by adjusting the mounting position of the first fixing block on the transmission rod, so that the swing angle of the stop swing rod can be adjusted, and finally the meshing precision of the first gear and the second gear is improved.

Optionally, the lateral wall fixed mounting of transfer line has the buffer beam, install buffer spring on the buffer beam, buffer spring keeps away from the tip and the frame fixed connection of buffer beam.

Through adopting above-mentioned technical scheme, buffer spring cushions the slip of buffer beam, reduces the vibration impact of equipment and to the influence of locking pendulum rod, improves locking subassembly job stabilization nature, reduces rocking of first gear under the locking state, reduces rocking of printing cylinder promptly, improves the centre gripping effect that the printing paper delivered to in the clamping jaw, improves the cooperation precision of first gear and second gear.

Optionally, the end of the printing rotating shaft is rotatably provided with a driving gear, a driving rack is arranged on the side wall of the screen printing frame, the driving rack is meshed with the driving gear, and the driving gear is meshed with the second gear.

By adopting the technical scheme, when the screen printing screen frame works, the second gear drives the driving gear to rotate positively and negatively, and the driving gear drives the driving rack to move back and forth, so that the screen printing screen frame can move back and forth on the frame.

Optionally, the number of the driving gear, the driving rack and the second gear is set to be multiple, and the driving gear, the driving rack and the second gear are respectively located at two ends of the printing cylinder, and the single driving gear, the single driving rack and the single second gear are mutually matched to be used in groups.

Through adopting above-mentioned technical scheme, set up to a plurality ofly through the quantity with drive gear and drive rack, the drive gear is to setting up the drive rack cooperation one by one on the silk screen frame, drives the silk screen frame jointly, has improved the stability that moves in the silk screen frame working process, reduces the relatively poor risk of printing quality that the silk screen frame removed unstable and lead to.

In summary, the present application includes at least one of the following beneficial technical effects:

the driving mechanism is used for driving the first gear to rotate so as to drive the printing roller, and the engagement state of the driving mechanism and the first gear is controlled by matching the stop mechanism with the avoidance groove, so that the problem that the structure of the printing roller driving mechanism is more complicated is solved, and the working stability of the printing roller driving mechanism is improved;

the rollers are arranged on the outer walls of the first fixing block and the second fixing block, the rollers can rotate along the first fixing block or the second fixing block, the friction between the first cam and the first fixing block or between the second cam and the second fixing block is effectively reduced by the rotation of the rollers, the abrasion of the first cam or the second cam is effectively reduced, and the service life of the first cam or the second cam is prolonged;

through set up buffer spring between buffer beam and frame, buffer spring cushions the slip of buffer beam, reduces the vibration impact of equipment and to the influence of locking pendulum rod, improves the stability of locking subassembly work, reduces rocking of first gear under the locking state, reduces rocking of printing cylinder promptly, improves the centre gripping effect that printing paper delivered to in the clamping jaw, improves the cooperation precision of first gear and second gear.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a partially enlarged schematic view of the structure a in fig. 1.

Fig. 3 is a schematic structural diagram illustrating an adjustment groove according to an embodiment of the present application.

Description of reference numerals: 1. a frame; 2. printing a rotating shaft; 3. a printing cylinder; 4. a clamping jaw; 5. screen printing a screen frame; 6. a first gear; 7. an avoidance groove; 8. a drive mechanism; 81. a drive motor; 82. a crankshaft; 83. a rocker; 84. an arc-shaped rack; 85. a drive shaft; 86. a second gear; 87. a third gear; 9. a stop mechanism; 91. stopping the swing rod; 92. a stopper groove; 93. a stopper block; 94. a drive assembly; 941. a first cam; 942. a second cam; 943. a transmission rod; 944. a first fixed block; 945. a second fixed block; 10. a roller; 11. an adjustment groove; 12. an adjusting screw; 13. a buffer rod; 14. a buffer spring; 15. a drive gear; 16. the rack is driven.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a printing cylinder transmission mechanism of a plane screen printing machine.

Referring to fig. 1 and 2, a transmission mechanism for a printing cylinder of a flat screen printing machine comprises a frame 1, a printing rotating shaft 2 rotatably mounted on the frame 1, a printing cylinder 3 fixedly mounted on the printing rotating shaft 2, a screen frame 5 slidably mounted above the frame 1, a driving mechanism 8 for driving the printing cylinder 3 to rotate, and a stop mechanism 9 for controlling the printing cylinder 3 to stop intermittently.

The driving mechanism 8 comprises a driving motor 81 arranged on the frame 1 through a bolt, a crankshaft 82 connected with the driving motor 81 through a coupling, a rocker 83 eccentrically hinged on the crankshaft 82, an arc-shaped rack 84 hinged at the end of the rocker 83 far away from the crankshaft 82, a driving shaft 85 rotatably arranged on the frame 1 through a bearing, and a second gear 86 and a third gear 87 which are arranged on the driving shaft 85 through flat keys, wherein the arc-shaped rack 84 is rotatably arranged on the frame 1 and meshed with the third gear 87, and swings to and fro along the hinged part of the arc-shaped rack 84 and the frame 1 under the driving action of the rocker 83.

When the driving mechanism 8 works, the driving motor 81 drives the crankshaft 82 to rotate, the crankshaft 82 drives the arc-shaped rack 84 hinged with the crankshaft through the rocker 83 to swing, the arc-shaped rack 84 drives the third gear 87 to rotate in a forward and reverse direction, the third gear 87 drives the second gear 86 to rotate through the driving shaft 85, and finally, the power is transmitted to the printing roller 3 through the second gear 86, so that the rotation of the printing roller 3 is realized.

The tip of printing cylinder 3 is through flat key fixedly connected with first gear 6, and meshing is thought with the second to first gear 6, has seted up on the periphery wall of first gear 6 and has dodged groove 7, utilizes to dodge groove 7 and can make first gear 6 and 8 short periods of actuating mechanism break away from, realizes printing cylinder 3's intermittent type and pauses the effect. The driving mechanism 8 drives the printing cylinder 3 to rotate through the first gear 6, and the stopping mechanism 9 controls the intermittent stop of the first gear 6 by controlling the position of the avoidance groove 7, so that the printing cylinder 3 is finally controlled.

Referring to fig. 2 and 3, the stopping mechanism 9 includes a stopping swing link 91 hinged to the frame 1, a stopping block 93 mounted on the first gear 6 through a bolt, a stopping groove 92 formed at an end of the stopping swing link 91, and a driving assembly 94 for driving the stopping swing link 91 to swing, wherein a roller 10 is rotatably mounted on an outer wall of the stopping block 93, and the roller 10 on the outer wall of the stopping block 93 is snap-fit in the stopping groove 92.

The driving assembly 94 comprises a first cam 941 and a second cam 942 fixedly mounted on the crankshaft 82, a transmission rod 943 slidably mounted on the crankshaft 82, an adjusting groove 11 is formed in the side wall of the transmission rod 943, a first fixing block 944 is fixedly mounted at the bottom of the adjusting groove 11 through an adjusting bolt, a second fixing block 945 is fixedly mounted on the side wall of the transmission rod 943 opposite to the adjusting groove 11, the transmission rod 943 is clamped and fixed between the first cam 941 and the second cam 942, a roller 10 is rotatably mounted on the outer walls of the first fixing block 944 and the second fixing block 945, the first cam 941 is in butt fit with the roller 10 on the first fixing block 944, the second cam 941 is in butt fit with the roller 10 on the second fixing block 945, and the transmission rod 943 is in hinged fit with a stop rod. The side wall of the transmission rod 943 is connected with a buffer rod 13 through a bolt, the buffer rod 13 is connected with a buffer spring 14 through a bolt, and the end part of the buffer spring 14 far away from the buffer rod 13 is connected with the rack 1 through a bolt.

When the stopping mechanism 9 works, the crankshaft 82 drives the first cam 941 and the second cam 942 to rotate, the first cam 941 abuts against the roller 10 of the first fixing block 944, and the second cam 942 abuts against the roller 10 of the second fixing block 945, so that the transmission rod 943 reciprocates along the length direction of the transmission rod, and the swing of the stopping swing rod 91 is realized. When the first cam 941 acts on the first fixing block 944, the stop lever 91 performs a limit bearing on the stop block 93 to limit the rotation of the first gear 6, so that the printing cylinder 3 stops. When the second cam 942 acts on the second fixing block 945, the stop swing rod 91 drives the first gear 6 and the second gear 86 to be meshed through the stop block 93, so that the second gear 86 and the first gear 6 rotate synchronously.

The adjusting groove 11 can adjust the swing angle of the stop swing link 91, that is, the meshing precision of the first gear 6 and the second gear 86 is improved, and the working stability of the driving assembly 94 is improved. The buffer spring 14 absorbs the mechanical vibration, reduces the influence of the vibration on the working state of the stop rod, and improves the working stability of the stop assembly.

A plurality of driving gears 15 are fixedly connected to both ends of the printing cylinder 3 by keys, and preferably, the number of the driving gears 15 is set to 2, and the driving gears 15 are respectively located at both ends of the printing cylinder 3, and the driving gears 15 are engaged with the third gear 87. The screen printing frame 5 is rectangular, and two side edges of the screen printing frame 5 close to the rack 1 are welded and connected with racks, and the racks are meshed with the driving gear 15. When the screen printing frame 5 works, the third gear 87 drives the driving gear 15 to generate a clockwise and anticlockwise reciprocating motion, and the driving gear 15 is matched with the rack to convert the rotation into reciprocating movement so as to realize the reciprocating motion of the screen printing frame 5 on the rack 1.

The implementation principle of the printing roller transmission mechanism of the plane screen printing machine in the embodiment of the application is as follows: when the printing machine works, the driving mechanism 8 drives the driving gear 15 to generate forward and reverse rotation movement, and the forward and reverse rotation movement is converted into reciprocating movement of the screen printing screen frame 5 by the aid of the cooperation of the driving gear 15 and the racks. When the third gear 87 of the driving mechanism 8 rotates forward under the action of the stopping mechanism 9, the stopping mechanism 9 causes the second gear 86 to be meshed with the first gear 6, the driving gear 15 and the first gear 6 rotate under the action of the third gear 87, the printing cylinder 3 rotates, the screen frame 5 moves, and the moving speed is the same as the linear speed of the printing cylinder 3. When the third gear 87 rotates reversely, the stopping mechanism 9 makes the avoiding groove 7 approach the third gear 87, the first gear 6 stops rotating, the intermittent suspension of the roller is realized, and meanwhile, the screen printing screen frame 5 returns to the initial position under the action of the driving mechanism 8 to wait for the next reciprocating motion.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a plane screen printing machine printing cylinder drive mechanism, includes frame (1), rotates to be installed printing pivot (2), fixed mounting in frame (1) are in printing cylinder (3), setting in printing pivot (2) are in clamping jaw (4) and slidable mounting in printing cylinder (3) silk screen frame (5) in frame (1), its characterized in that: fixed mounting has first gear (6) in printing pivot (2), the periphery wall of first gear (6) has been seted up and has been dodged groove (7), install drive first gear (6) on frame (1) and rotate and drive silk screen printing frame (5) reciprocating motion's actuating mechanism (8), just be provided with control first gear (6) pivoted detent mechanism (9) on frame (1).

2. A flat screen printing machine printing cylinder transmission according to claim 1, characterised in that: the driving mechanism (8) comprises a driving motor (81) fixedly mounted on the rack (1), a crankshaft (82) connected with the driving motor (81), a rocker (83) eccentrically hinged to the crankshaft (82), an arc-shaped rack (84) rotatably connected to the end part, far away from the crankshaft (82), of the rocker (83), a driving shaft (85) rotatably mounted on the rack (1), and a second gear (86) and a third gear (87) fixedly mounted on the driving shaft (85), wherein the second gear (86) is meshed with the first gear (6), the third gear (87) is meshed with the arc-shaped rack (84), and the arc-shaped rack (84) is hinged to the rack (1).

3. A flat screen printing machine printing cylinder transmission according to claim 2, characterised in that: stop mechanism (9) are including rotating the connection stop pendulum rod (91) on frame (1), set up stop groove (92), fixed mounting on stop pendulum rod (91) stop block (93) and the drive on first gear (6) stop pendulum rod (91) pivoted drive assembly (94), stop block (93) with stop groove (92) joint cooperation.

4. A flat screen printing machine printing cylinder transmission according to claim 3, characterised in that: drive assembly (94) including fixed mounting first cam (941) and second cam (942) on crankshaft (82), the centre gripping is in first cam (941) with drive lever (943) between second cam (942), install first fixed block (944) and second fixed block (945) at drive lever (943) both sides wall of locating, first cam (941) with first fixed block (944) looks butt, second cam (942) with second fixed block (945) looks butt, drive lever (943) with crankshaft (82) sliding connection, the tip of drive lever (943) with stop pendulum rod (91) rotation connection.

5. The transmission mechanism for the printing cylinder of a flat screen printing machine according to claim 4, characterized in that: and rollers (10) are arranged on the outer walls of the first fixing block (944) and the second fixing block (945).

6. The transmission mechanism for the printing cylinder of a flat screen printing machine according to claim 4, characterized in that: seted up on the lateral wall of transfer line (943) adjustment tank (11), first fixed block (944) slidable mounting in adjustment tank (11), wear to be equipped with adjusting screw (12) on first fixed block (944), adjusting screw (12) pass first fixed block (944) with transfer line (943) fixed connection.

7. The transmission mechanism for the printing cylinder of a flat screen printing machine according to claim 4, characterized in that: the lateral wall fixed mounting of transfer line (943) has buffer beam (13), install buffer spring (14) on buffer beam (13), buffer spring (14) are kept away from the tip and frame (1) fixed connection of buffer beam (13).

8. A flat screen printing machine printing cylinder transmission according to claim 2, characterised in that: the tip of printing pivot (2) rotates and installs drive gear (15), be provided with drive rack (16) on the lateral wall of silk screen frame (5), drive rack (16) with drive gear (15) meshing sets up, drive gear (15) with second gear (86) meshing sets up.

9. A flat screen printing machine printing cylinder transmission according to claim 8, characterised in that: the number of the driving gears (15), the number of the driving racks (16) and the number of the second gears (86) are multiple, the driving gears, the driving racks (16) and the second gears (86) are respectively arranged at two ends of the printing cylinder (3), and the single driving gear (15), the single driving rack (16) and the single second gear (86) are mutually matched to be used in a group.

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