Double-sided double-color code spraying equipment

Abstract

The invention relates to the related technical field of code spraying equipment, in particular to double-sided double-color code spraying equipment which comprises a rack, a first code spraying structure, a second code spraying structure and a drying channel, a front mounting plate and a rear mounting plate are fixedly connected to the rack, and a lower guide roller and an upper guide roller are rotatably mounted between the front mounting plate and the rear mounting plate; a film to be subjected to code spraying is conveyed from the lower guide roller to the upper guide roller, a first transmission structure and a second transmission structure are mounted between the front mounting plate and the rear mounting plate, and the first code spraying structure is mounted on the first transmission structure; the first transmission structure and the second transmission structure are used for driving the first code spraying structure and the second code spraying structure, and a first-stage synchronous chain wheel, a second-stage synchronous chain wheel and a transmission chain are arranged, so that a single driving structure can synchronously drive the first code spraying structure and the second code spraying structure, and therefore, the driving structure of the device is effectively optimized; and circuit control of equipment is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field related to inkjet coding equipment, and in particular to a double-sided double-color inkjet coding equipment. Background Art

[0002] The inkjet printer is a machine used to print characters (such as production date, expiration date, batch number, etc.), icons, specifications, barcodes and anti-counterfeiting labels on the surface of products. Its advantages are that it does not touch the product, the printing content is flexible and variable, the character size can be adjusted, and it can be connected to a computer for complex database printing; The existing Chinese patent document with announcement number CN216330964U discloses a PC film inkjet coding device and PC film processing equipment, and its scheme includes: an inkjet mechanism, which is arranged above the PC film; it includes an inkjet frame and a plurality of inkjet head mechanisms; the inkjet frame is arranged across the PC film, and the inkjet head mechanism is movably arranged on the inkjet frame; the inkjet head mechanism includes an inkjet head and a lifting knob; the inkjet head is detachably arranged on the inkjet head mechanism; the lifting knob is connected to the inkjet head and is used to adjust the height position of the inkjet head; an inkjet main control device includes an inkjet control cabinet, which is connected to the inkjet mechanism signal; an ink curing mechanism, which is arranged above the PC film and behind the inkjet mechanism; the ink curing mechanism includes a plurality of UV lamp mechanisms, the number of the UV lamp mechanisms matches the number of the inkjet head mechanisms, and the positions of the UV lamp mechanisms and the inkjet head mechanisms correspond one to one; However, the coding equipment in the above scheme is not convenient for synchronous coding on both sides of the structure, which leads to low coding processing efficiency of the equipment, and the traditional coding equipment has more installation structures for disassembly and assembly, which leads to more time for its inspection and maintenance. Therefore, the present invention proposes a double-sided two-color coding equipment to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a double-sided two-color inkjet coding device to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a double-sided two-color inkjet printer, comprising: A frame, a front mounting plate and a rear mounting plate are fixedly connected to the frame, a lower guide roller and an upper guide roller are rotatably mounted between the front mounting plate and the rear mounting plate, and the film to be coded is transported by the lower guide roller toward the upper guide roller, and a first transmission structure and a second transmission structure are installed between the front mounting plate and the rear mounting plate; A first coding structure, wherein the first coding structure is mounted on the first transmission structure and the first coding structure is driven by the first transmission structure; A second coding structure, wherein the second coding structure is mounted on the second transmission structure, and the second coding structure is driven by the second transmission structure; A drying channel is installed between the front mounting plate and the rear mounting plate, and the film after coding is passed through the drying channel.

[0005] Preferably, the first transmission structure includes a guide rod and a transmission screw, the base of the first coding structure is movably mounted on the guide rod, and the base of the first coding structure is driven by the transmission screw, the second transmission structure has the same structure as the first transmission structure, and the movement mode of the second coding structure is the same as the movement mode of the first coding structure, a servo motor is fixedly mounted on the rear mounting plate through a motor bracket, one end of the transmission screw on the second transmission structure is transmission-connected to the output shaft of the servo motor, a primary synchronous sprocket is fixedly mounted on one end of the transmission screw on the first transmission structure, and a secondary synchronous sprocket is fixedly mounted on one end of the transmission screw on the second transmission structure, the primary synchronous sprocket and the secondary synchronous sprocket are of the same model, and the primary synchronous sprocket and the secondary synchronous sprocket are transmission-connected via a transmission chain.

[0006] Preferably, the front mounting plate is provided with a primary bearing hole and a primary mounting hole, the rear mounting plate is provided with a secondary bearing hole and a secondary mounting hole, the guide rod is fixed between the front mounting plate and the rear mounting plate, the primary bearing hole and the secondary bearing hole are respectively fixedly installed with a primary bearing and a secondary bearing, and the transmission screw is rotatably installed between the front mounting plate and the rear mounting plate through the primary bearing and the secondary bearing.

[0007] Preferably, a positioning shaft hole is provided on the transmission screw, and a movable hole is provided on the end side wall of the transmission screw, three movable holes are provided, and the three movable holes are respectively provided corresponding to the primary synchronous sprocket, the primary bearing, and the secondary bearing, a primary threaded hole is provided on the bottom surface of the movable hole, a threaded seat is screwed in the primary threaded hole, a regular hexagonal through hole is provided on the threaded seat, a force-bearing rod is movably installed in the regular hexagonal through hole, the cross-sectional size of the force-bearing rod matches the size of the regular hexagonal through hole, and the inner end of the force-bearing rod is hemispherically arranged, and the outer end of the force-bearing rod is integrally formed with a force-bearing seat, the force-bearing seat is movably arranged in the movable hole, and the outer end of the force-bearing seat is hemispherically arranged, a wrench groove is provided on the outer end surface of the force-bearing seat, and a return spring is sleeved on the force-bearing rod, and the two ends of the return spring are respectively fixedly glued to the threaded seat and the force-bearing seat.

[0008] Preferably, positioning grooves are provided on the side walls of the inner holes of the primary synchronous sprocket, the primary bearing and the secondary bearing. The positioning grooves are hemispherical grooves, and the dimensions of the positioning grooves match the dimensions of the outer ends of the force-bearing seats. When the reset spring is in a reset state, the outer ends of the force-bearing seats are embedded in the positioning grooves. When the force-bearing seats are pushed inward by force, the force-bearing seats are completely detached from the positioning grooves, and a positioning shaft is fixedly installed in the positioning shaft hole.

[0009] Preferably, when the inner end of the force-bearing rod abuts against the side wall of the positioning shaft, the outer end of the force-bearing seat is completely embedded in the positioning groove, and the inner end of the positioning shaft is conical.

[0010] Preferably, a snap-fit ​​groove is provided at the inner end edge of the secondary bearing hole, and a snap-fit ​​protrusion is integrally formed on the outer side wall of the secondary bearing. When the secondary bearing is actually installed, the snap-fit ​​protrusion is embedded in the snap-fit ​​groove.

[0011] Preferably, a primary guide groove is provided at the outer end edge of the primary bearing hole, a secondary guide groove is provided at the outer end edge of the primary mounting hole, a positioning track groove and a secondary threaded hole are provided on the side of the front mounting plate, a positioning plate is fixedly installed at the secondary threaded hole by positioning bolts, the positioning plate is L-shaped, and a primary guide block, a secondary guide block and a positioning track are fixedly connected to the inner side wall of the positioning plate, the cross-section of the positioning track is an isosceles trapezoid, and when the positioning plate is actually installed, the primary guide block, the secondary guide block and the positioning track are respectively inserted into the primary guide groove, the secondary guide groove and the positioning track groove.

[0012] Preferably, the inner ends of the primary guide block and the secondary guide block are both semi-circular, and primary positioning teeth and secondary positioning teeth are respectively integrally formed on the semi-circular side walls of the primary guide block and the secondary guide block. A primary positioning tooth groove is provided on the outer ring side wall of the primary bearing, and a secondary positioning tooth groove is provided on the end side wall of the guide rod. The primary positioning tooth groove and the secondary positioning tooth groove are evenly circumferentially provided with a circle. When the positioning plate is actually installed, the primary positioning teeth and the secondary positioning teeth are respectively engaged in the primary positioning tooth groove and the secondary positioning tooth groove.

[0013] Preferably, a connecting bracket is fixedly connected to the outer wall of the positioning plate, and a guide plate is rotatably installed on the connecting bracket via a rotating shaft. The guide plate is coaxially arranged with the transmission screw, and a U-shaped groove is provided on the end face of the guide plate. When the positioning plate is actually installed, the end of the transmission screw is engaged with the U-shaped groove, and at this time, the inner end of the positioning shaft is abutted against the bottom of the positioning shaft hole, and the outer end face of the positioning shaft is abutted against the bottom face of the U-shaped groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a double-sided double-color inkjet printing device composed of a frame, a first inkjet printing structure, a second inkjet printing structure and a drying channel, and driving the first inkjet printing structure and the second inkjet printing structure through a first transmission structure and a second transmission structure, and by setting up a primary synchronous sprocket, a secondary synchronous sprocket and a transmission chain, a single driving structure can synchronously drive the first inkjet printing structure and the second inkjet printing structure, thereby effectively optimizing the driving structure of the device and facilitating circuit control of the equipment; 2. By opening a positioning shaft hole, a movable hole, and a primary threaded hole on the transmission screw, and by arranging a force rod, a force seat and a reset spring, and arranging a positioning shaft in the positioning shaft hole, the primary synchronous sprocket, the primary bearing, and the secondary bearing can be synchronously installed through the supporting effect of the positioning shaft, thereby improving the convenience of inspection and maintenance of the device, and the force rod is a hexagonal prism, and the force rod passes through the regular hexagonal through hole on the threaded seat, and a wrench groove is opened on the outer end face of the force seat, so that the force seat can be disassembled and assembled by screwing the force seat, thereby effectively improving the convenience of disassembly and assembly of the force seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a practical effect diagram of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle; Figure 4 for Figure 2 A magnified schematic diagram of the structure at B in the middle; Figure 5 It is a schematic diagram of the frame structure of the present invention; Figure 6 for Figure 5 A magnified schematic diagram of the structure at C in the middle; Figure 7 for Figure 5 A magnified schematic diagram of the structure at D in the middle; Figure 8 It is a schematic diagram of the transmission screw structure of the present invention; Figure 9 A half-section view of the transmission screw of the present invention; Figure 10 for Figure 9 The enlarged schematic diagram of the structure at E in the middle; Figure 11 for Figure 9 A magnified schematic diagram of the structure at F in the middle; Figure 12 It is a structural schematic diagram of the threaded seat and the force bearing seat of the present invention; Figure 13 It is a half-section view of the threaded seat and the force bearing seat of the present invention; Figure 14 This is a schematic diagram of the structure of the primary guide block and the secondary guide block of the present invention; Figure 15 It is a schematic diagram of the guide rod structure of the present invention; Figure 16 for Figure 15 A magnified schematic diagram of the structure at G in the middle; Figure 17 This is a schematic diagram of the primary bearing structure of the present invention; Figure 18 It is a schematic diagram of the secondary bearing structure of the present invention.

[0016] In the figure: frame 1, first coding structure 2, second coding structure 3, drying channel 4, front mounting plate 5, rear mounting plate 6, lower guide roller 7, upper guide roller 8, first transmission structure 9, second transmission structure 10, film 11, guide rod 12, transmission screw 13, primary synchronous sprocket 14, secondary synchronous sprocket 15, transmission chain 16, primary bearing hole 17, primary mounting hole 18, secondary bearing hole 19, secondary mounting hole 20, primary bearing 21, secondary bearing 22, motor bracket 23, servo motor 24, positioning shaft hole 25, movable hole 26, primary Threaded hole 27, threaded seat 28, force rod 29, force seat 30, return spring 31, regular hexagonal through hole 32, wrench slot 33, positioning shaft 34, engaging slot 35, engaging protrusion 36, primary guide slot 37, secondary guide slot 38, positioning track slot 39, secondary threaded hole 40, positioning plate 41, positioning bolt 42, primary guide block 43, secondary guide block 44, positioning track 45, primary positioning tooth 46, secondary positioning tooth 47, primary positioning tooth groove 48, secondary positioning tooth groove 49, connecting bracket 50, guide plate 51, U-shaped slot 52, positioning slot 60. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 - 18 The present invention provides the following three preferred embodiments: Embodiment 1: A double-sided two-color inkjet coding equipment comprises a frame 1, a first inkjet coding structure 2, a second inkjet coding structure 3 and a drying channel 4, a front mounting plate 5 and a rear mounting plate 6 are fixedly connected to the frame 1, a lower guide roller 7 and an upper guide roller 8 are rotatably installed between the front mounting plate 5 and the rear mounting plate 6, and a film 11 to be coded is conveyed by the lower guide roller 7 toward the upper guide roller 8, a first transmission structure 9 and a second transmission structure 10 are installed between the front mounting plate 5 and the rear mounting plate 6, the first inkjet coding structure 2 is installed on the first transmission structure 9, and the first inkjet coding structure 2 is driven by the first transmission structure 9, the second inkjet coding structure 3 is installed on the second transmission structure 10, and the second inkjet coding structure 3 is driven by the second transmission structure 10, the drying channel 4 is installed between the front mounting plate 5 and the rear mounting plate 6, and the film 11 after coding is completed passes through the drying channel 4.

[0019] The first transmission structure 9 includes a guide rod 12 and a transmission screw 13. The base of the first coding structure 2 is movably mounted on the guide rod 12, and the base of the first coding structure 2 is driven by the transmission screw 13. The second transmission structure 10 has the same structure as the first transmission structure 9. The movement mode of the second coding structure 3 is the same as the movement mode of the first coding structure 2. A servo motor 24 is fixedly mounted on the rear mounting plate 6 through a motor bracket 23. One end of the transmission screw 13 on the second transmission structure 10 is transmission-connected to the output shaft of the servo motor 24. A primary synchronous sprocket 14 is fixedly mounted on one end of the transmission screw 13 on the first transmission structure 9, and a secondary synchronous sprocket is fixedly mounted on one end of the transmission screw 13 on the second transmission structure 10. The step sprocket 15, the first-level synchronous sprocket 14, and the second-level synchronous sprocket 15 are of the same model, and the first-level synchronous sprocket 14 and the second-level synchronous sprocket 15 are connected by a transmission chain 16. A double-sided two-color inkjet coding device composed of a frame 1, a first inkjet coding structure 2, a second inkjet coding structure 3 and a drying channel 4 is set, and the first inkjet coding structure 2 and the second inkjet coding structure 3 are driven by the first transmission structure 9 and the second transmission structure 10. The first-level synchronous sprocket 14, the second-level synchronous sprocket 15, and the transmission chain 16 are set to realize a single drive structure to synchronously drive the first inkjet coding structure 2 and the second inkjet coding structure 3, thereby effectively optimizing the drive structure of the device and facilitating circuit control of the equipment.

[0020] A primary bearing hole 17 and a primary mounting hole 18 are provided on the front mounting plate 5, and a secondary bearing hole 19 and a secondary mounting hole 20 are provided on the rear mounting plate 6. The guide rod 12 is fixed between the front mounting plate 5 and the rear mounting plate 6. A primary bearing 21 and a secondary bearing 22 are fixedly installed in the primary bearing hole 17 and the secondary bearing hole 19 respectively. The transmission screw 13 is rotatably installed between the front mounting plate 5 and the rear mounting plate 6 through the primary bearing 21 and the secondary bearing 22.

[0021] Example 2: Please refer to Figures 9 - 13 and Figures 17 - 18 On the basis of the first embodiment, a positioning shaft hole 25 is provided on the transmission screw 13, and a movable hole 26 is provided on the end side wall of the transmission screw 13. There are three movable holes 26, and the three movable holes 26 are respectively provided corresponding to the primary synchronous sprocket 14, the primary bearing 21, and the secondary bearing 22. A primary threaded hole 27 is provided on the bottom surface of the movable hole 26, and a threaded seat 28 is screwed in the primary threaded hole 27. A regular hexagonal through hole 32 is provided on the threaded seat 28, and a force rod 29 is movably installed in the regular hexagonal through hole 32. The cross-sectional size of the force rod 29 matches the size of the regular hexagonal through hole 32, and the inner side end of the force rod 29 is hemispherical, and the outer side end of the force rod 29 is integrally formed with a force seat 30, and the force seat 30 is movably arranged In the movable hole 26, the outer end of the force-bearing seat 30 is hemispherical, and a wrench groove 33 is provided on the outer end face of the force-bearing seat 30. A return spring 31 is sleeved on the force-bearing rod 29. The two ends of the return spring 31 are respectively fixedly glued to the threaded seat 28 and the force-bearing seat 30. A positioning groove 60 is provided on the inner hole side wall of the primary synchronous sprocket 14, the primary bearing 21, and the secondary bearing 22. The positioning groove 60 is a hemispherical groove, and the size of the positioning groove 60 matches the size of the outer end of the force-bearing seat 30. When the return spring 31 is in the reset state, the outer end of the force-bearing seat 30 is embedded in the positioning groove 60. When the force-bearing seat 30 is pushed inward by force, the force-bearing seat 30 is completely separated from the positioning groove 60, and a positioning shaft 34 is fixedly installed in the positioning shaft hole 25.

[0022] When the inner end of the force-bearing rod 29 abuts against the side wall of the positioning shaft 34, the outer end of the force-bearing seat 30 is completely embedded in the positioning groove 60, and the inner end of the positioning shaft 34 is tapered. By opening a positioning shaft hole 25, a movable hole 26, and a primary threaded hole 27 on the transmission screw 13, and by setting the force-bearing rod 29, the force-bearing seat 30 and the return spring 31, and setting the positioning shaft 34 in the positioning shaft hole 25, the primary synchronous sprocket 14, the primary bearing 21, and the secondary bearing 22 are synchronously installed through the abutting effect of the positioning shaft 34, thereby improving the convenience of inspection and maintenance of the device, and the force-bearing rod 29 is a hexagonal prism, and the force-bearing rod 29 passes through the regular hexagonal through hole 32 on the threaded seat 28, and a wrench groove 33 is opened on the outer end surface of the force-bearing seat 30, so that the force-bearing seat 30 can be disassembled and assembled by screwing the force-bearing seat 30, thereby effectively improving the convenience of disassembly and assembly of the force-bearing seat 30.

[0023] Example 3: Please refer to Figures 5 - 7 and Figures 14 - 17, on the basis of the second embodiment, a clamping groove 35 is provided at the inner end edge position of the secondary bearing hole 19, and a clamping protrusion 36 is integrally formed on the outer side wall of the secondary bearing 22. When the secondary bearing 22 is actually installed, the clamping protrusion 36 is embedded into the clamping groove 35, which is convenient for positioning and fixing the secondary bearing 22.

[0024] A first-level guiding groove 37 is provided at the outer end edge position of the first-level bearing hole 17, a second-level guiding groove 38 is provided at the outer end edge position of the first-level mounting hole 18, a positioning track groove 39 and a second-level threaded hole 40 are provided on the side of the front mounting plate 5, a positioning plate 41 is fixedly installed at the second-level threaded hole 40 through a positioning bolt 42, the positioning plate 41 is arranged in an L shape, and a first-level guiding block 43, a second-level guiding block 44 and a positioning track 45 are fixedly connected to the inner side wall of the positioning plate 41. The cross section of the positioning track 45 is an isosceles trapezoid. When the positioning plate 41 is actually installed, the first-level guiding block 43, the second-level guiding block 44 and the positioning track 45 are respectively inserted into the first-level guiding groove 37, the second-level guiding groove 38 and the positioning track groove 39.

[0025] The inner ends of the first-level guiding block 43 and the second-level guiding block 44 are both arranged in a semi-circular arc shape, and a first-level positioning tooth 46 and a second-level positioning tooth 47 are integrally formed on the semi-circular arc side walls of the first-level guiding block 43 and the second-level guiding block 44 respectively. A first-level positioning tooth groove 48 is provided on the outer ring side wall of the first-level bearing 21, and a second-level positioning tooth groove 49 is provided on the end side wall of the guide rod 12. The first-level positioning tooth groove 48 and the second-level positioning tooth groove 49 are both equally circumferentially provided with a circle. When the positioning plate 41 is actually installed, the first-level positioning tooth 46 and the second-level positioning tooth 47 are respectively clamped in the first-level positioning tooth groove 48 and the second-level positioning tooth groove 49. Through the installation of the positioning plate 41, the first-level guiding block 43, the second-level guiding block 44 and the positioning track 45 can be respectively inserted into the first-level guiding groove 37, the second-level guiding groove 38 and the positioning track groove 39, so that the first-level positioning tooth 46 and the second-level positioning tooth 47 can be synchronously clamped in the first-level positioning tooth groove 48 and the second-level positioning tooth groove 49, thereby synchronously positioning and fixing the guide rod 12 and the first-level bearing 21.

[0026] A connecting bracket 50 is fixedly connected to the outer wall of the positioning plate 41, and a guide plate 51 is rotatably installed on the connecting bracket 50 through a rotating shaft. The guide plate 51 is coaxially arranged with the transmission screw 13, and a U-shaped groove 52 is opened on the end face of the guide plate 51. When the positioning plate 41 is actually installed, the end of the transmission screw 13 is engaged with the U-shaped groove 52, and at this time, the inner end of the positioning shaft 34 is set against the bottom of the positioning shaft hole 25, and the outer end face of the positioning shaft 34 is set against the bottom face of the U-shaped groove 52. Through the installation of the positioning plate 41, the end of the positioning shaft 34 can be synchronously positioned and fixed, so that the positioning shaft 34 can be positioned without using other positioning structures. When the device disassembles and assembles the positioning plate 41, the guide rod 12, the transmission screw 13, the synchronous sprocket, the primary bearing 21, and the secondary bearing 22 can be synchronously disassembled and assembled, thereby further improving the convenience of overall disassembly, assembly and maintenance of the device.

[0027] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A double-sided two-color inkjet printer, characterized in that: include: A frame (1), wherein a front mounting plate (5) and a rear mounting plate (6) are fixedly connected to the frame (1), a lower guide roller (7) and an upper guide roller (8) are rotatably mounted between the front mounting plate (5) and the rear mounting plate (6), and a film (11) to be coded is transported by the lower guide roller (7) in the direction of the upper guide roller (8), and a first transmission structure (9) and a second transmission structure (10) are mounted between the front mounting plate (5) and the rear mounting plate (6); A first coding structure (2), wherein the first coding structure (2) is mounted on the first transmission structure (9), and the first coding structure (2) is driven by the first transmission structure (9); A second coding structure (3), wherein the second coding structure (3) is mounted on the second transmission structure (10), and the second coding structure (3) is driven by the second transmission structure (10); A drying channel (4) is installed between the front mounting plate (5) and the rear mounting plate (6), and the film (11) after coding is passed through the drying channel (4).

2. A double-sided two-color inkjet printer according to claim 1, characterized in that: The first transmission structure (9) comprises a guide rod (12) and a transmission screw (13); the base of the first coding structure (2) is movably mounted on the guide rod (12), and the base of the first coding structure (2) is driven by the transmission screw (13); the second transmission structure (10) has the same structure as the first transmission structure (9); the movement mode of the second coding structure (3) is the same as the movement mode of the first coding structure (2); a servo motor (24) is fixedly mounted on the rear mounting plate (6) via a motor bracket (23); and the second transmission structure (10) is a plurality of motors configured to move the servo motor (24) and the motor bracket (23). One end of the transmission screw (13) on the structure (10) is in transmission connection with the output shaft of the servo motor (24); one end of the transmission screw (13) on the first transmission structure (9) is fixedly mounted with a primary synchronous sprocket (14); one end of the transmission screw (13) on the second transmission structure (10) is fixedly mounted with a secondary synchronous sprocket (15); the primary synchronous sprocket (14) and the secondary synchronous sprocket (15) are of the same model, and the primary synchronous sprocket (14) and the secondary synchronous sprocket (15) are in transmission connection with each other via a transmission chain (16).

3. A double-sided two-color inkjet printer according to claim 2, characterized in that: The front mounting plate (5) is provided with a primary bearing hole (17) and a primary mounting hole (18), the rear mounting plate (6) is provided with a secondary bearing hole (19) and a secondary mounting hole (20), the guide rod (12) is fixed between the front mounting plate (5) and the rear mounting plate (6), a primary bearing (21) and a secondary bearing (22) are fixedly mounted in the primary bearing hole (17) and the secondary bearing hole (19), respectively, and the transmission screw (13) is rotatably mounted between the front mounting plate (5) and the rear mounting plate (6) via the primary bearing (21) and the secondary bearing (22).

4. A double-sided two-color inkjet printer according to claim 3, characterized in that: The transmission screw (13) is provided with a positioning shaft hole (25), and the end side wall of the transmission screw (13) is provided with a movable hole (26), and three movable holes (26) are provided, and the three movable holes (26) are respectively provided corresponding to the primary synchronous sprocket (14), the primary bearing (21), and the secondary bearing (22), and the bottom surface of the movable hole (26) is provided with a primary threaded hole (27), and a threaded seat (28) is screwed into the primary threaded hole (27), and a regular hexagonal through hole (32) is provided on the threaded seat (28), and a force bearing member is movably installed in the regular hexagonal through hole (32). The cross-sectional dimensions of the force-bearing rod (29) match the dimensions of the regular hexagonal through hole (32), and the inner end of the force-bearing rod (29) is hemispherically arranged, and the outer end of the force-bearing rod (29) is integrally formed with a force-bearing seat (30), the force-bearing seat (30) is movably arranged in the movable hole (26), and the outer end of the force-bearing seat (30) is hemispherically arranged, and a wrench groove (33) is provided on the outer end surface of the force-bearing seat (30), and a return spring (31) is sleeved on the force-bearing rod (29), and the two ends of the return spring (31) are respectively fixedly glued to the threaded seat (28) and the force-bearing seat (30).

5. A double-sided two-color inkjet printer according to claim 4, characterized in that: The inner hole side walls of the primary synchronous sprocket (14), the primary bearing (21), and the secondary bearing (22) are all provided with positioning grooves (60), the positioning grooves (60) are hemispherical notches, and the size of the positioning grooves (60) matches the size of the outer end of the force-bearing seat (30). When the reset spring (31) is in a reset state, the outer end of the force-bearing seat (30) is embedded in the positioning groove (60), and when the force-bearing seat (30) is pushed inward by force, the force-bearing seat (30) is completely separated from the positioning groove (60), and a positioning shaft (34) is fixedly installed in the positioning shaft hole (25).

6. A double-sided two-color inkjet printer according to claim 5, characterized in that: When the inner end of the force-bearing rod (29) abuts against the side wall of the positioning shaft (34), the outer end of the force-bearing seat (30) is completely embedded in the positioning groove (60), and the inner end of the positioning shaft (34) is arranged in a conical shape.

7. A double-sided two-color inkjet printer according to claim 6, characterized in that: A snap-fit ​​groove (35) is provided at the inner end edge of the secondary bearing hole (19), and a snap-fit ​​protrusion (36) is integrally formed on the outer wall of the secondary bearing (22). When the secondary bearing (22) is actually installed, the snap-fit ​​protrusion (36) is embedded in the snap-fit ​​groove (35).

8. The double-sided double-color inkjet printer according to claim 7, characterized in that: A primary guide groove (37) is provided at the outer end edge of the primary bearing hole (17), a secondary guide groove (38) is provided at the outer end edge of the primary mounting hole (18), a positioning track groove (39) and a secondary threaded hole (40) are provided on the side of the front mounting plate (5), a positioning plate (41) is fixedly mounted at the secondary threaded hole (40) by means of a positioning bolt (42), the positioning plate (41) is arranged in an L-shape, and a primary guide block (43), a secondary guide block (44) and a positioning track (45) are fixedly connected to the inner side wall of the positioning plate (41), the cross section of the positioning track (45) is an isosceles trapezoid, and when the positioning plate (41) is actually installed, the primary guide block (43), the secondary guide block (44) and the positioning track (45) are respectively inserted into the primary guide groove (37), the secondary guide groove (38) and the positioning track groove (39).

9. A double-sided double-color inkjet printer according to claim 8, characterized in that: The inner ends of the primary guide block (43) and the secondary guide block (44) are both arranged in a semicircular arc, and the semicircular arc side walls of the primary guide block (43) and the secondary guide block (44) are respectively integrally formed with a primary positioning tooth (46) and a secondary positioning tooth (47). The outer ring side wall of the primary bearing (21) is provided with a primary positioning tooth groove (48), and the end side wall of the guide rod (12) is provided with a secondary positioning tooth groove (49). The primary positioning tooth groove (48) and the secondary positioning tooth groove (49) are evenly arranged in a circle. When the positioning plate (41) is actually installed, the primary positioning tooth (46) and the secondary positioning tooth (47) are respectively engaged in the primary positioning tooth groove (48) and the secondary positioning tooth groove (49).

10. A double-sided double-color inkjet printer according to claim 9, characterized in that: A connecting bracket (50) is fixedly connected to the outer wall of the positioning plate (41), and a guide plate (51) is rotatably mounted on the connecting bracket (50) via a rotating shaft. The guide plate (51) is coaxially arranged with the transmission screw (13), and a U-shaped groove (52) is provided on the end surface of the guide plate (51). When the positioning plate (41) is actually installed, the end of the transmission screw (13) is engaged with the U-shaped groove (52), and at this time, the inner end of the positioning shaft (34) is arranged to abut against the bottom of the positioning shaft hole (25), and the outer end surface of the positioning shaft (34) is arranged to abut against the bottom surface of the U-shaped groove (52).

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