An efficient four-axis digital printing machine

Abstract

The present invention relates to an efficient four-axis digital printing machine, which is characterized in that: it includes a printing machine body and a shaft-changing mechanism; a connecting seat is provided at the bottom of one side of the printing machine body; the shaft-changing mechanism is arranged on the connecting seat through a slide rail and a slider, and a moving cylinder for driving its movement is provided on one side of the shaft-changing mechanism; the shaft-changing mechanism includes a lifting base and a rotary indexer; the rotary indexer is arranged on the lifting base, the input end of the rotary indexer is connected with a rotary motor for driving its rotation, and the output end of the rotary indexer is connected with a rotary disk; four groups of cloth-passing roller assemblies are distributively arranged at the top of the rotary disk, and a rotating motor for driving its rotation is connected to one end of each cloth-passing roller assembly close to the rotary disk. The present invention sets a shaft-changing mechanism on one side of the printing machine main body, and cyclically switches the cloth-passing roller assemblies through the shaft-changing mechanism, so that the printing machine main body can continuously work without interruption, improving work efficiency.

Description

Technical Field

[0001] The present invention relates to an efficient four-axis digital printing machine, belonging to the technical field of digital printing machines. Background Art

[0002] Digital printing is printing using digital technology. The digital printing technology is a high-tech product integrating machinery, computer, and electronic information technology, which has gradually formed with the continuous development of computer technology. When digitally printing on fabrics, different printing patterns are printed on the fabric surface by the movement of the nozzles to meet the market demand. Before printing, the fabric is manually sleeved on the fabric feeding roller by traditional digital printing machines; during printing, the fabric on the rotating fabric feeding roller is printed by the moving nozzles; after printing, the fabric is manually removed from the fabric feeding roller and transferred to a dryer for drying. During the processes of manual loading and unloading, the equipment has to stop working. After the loading or unloading is completed, the equipment is restarted for printing, resulting in low work efficiency; moreover, manual transfer of the fabric to the dryer for drying increases the labor intensity of the staff.

[0003] Therefore, how to provide an efficient four-axis digital printing machine is the research objective of the present invention. Summary of the Invention

[0004] Aiming at the deficiencies of the above technologies, the present invention provides an efficient four-axis digital printing machine. A shaft-changing mechanism is arranged on one side of the printing machine body. The fabric feeding roller assembly is cyclically switched by the shaft-changing mechanism, so that the printing machine body can continuously work without interruption, improving work efficiency. And the shaft-changing mechanism rotates the fabric feeding roller assembly to the position of the dryer to dry the printed fabric.

[0005] To solve the problems of the prior art, the technical solutions adopted by the present invention are as follows:

[0006] An efficient four-axis digital printing machine, comprising a printing machine body and a shaft-changing mechanism; a connecting seat is provided at the bottom of one side of the printing machine body, a dynamic balance mechanism is provided in the middle, and a nozzle is movably provided at the top. The dynamic balance mechanism includes a top shaft lifting plate, a conical top shaft and a top shaft lifting screw rod; the top shaft lifting plate is installed on the printing machine body through a slide rail and a slider; the conical top shaft is rotatably installed on the top shaft lifting plate through a bearing, and a conical head is integrally provided at one end of the conical top shaft; the top shaft lifting screw rod is vertically installed on the printing machine body through a screw rod seat, its top end is connected to the top shaft lifting plate, and the bottom end is connected to a screw rod motor for driving its rotation; the shaft-changing mechanism is movably provided on the connecting seat through a slide rail and a slider, and a moving cylinder for driving its movement is provided on the side of the shaft-changing mechanism away from the printing machine body; the shaft-changing mechanism includes a lifting base and a rotary indexing device; the rotary indexing device is provided on the lifting base, the input end of the rotary indexing device is connected to a rotary motor for driving its rotation, and the output end of the rotary indexing device is connected to a rotary disk; four groups of cloth-passing roller assemblies are distributively provided on the top of the rotary disk, and each group of cloth-passing roller assemblies includes a roller, a main shaft and a pin shaft; the pin shaft is rotatably installed on the rotary disk through a bearing seat, and a small magnetic wheel is provided on the pin shaft; the main shaft is inserted and connected to the pin shaft, and a rotating bearing is provided at one end of the main shaft away from the pin shaft, and the rotating bearing is matched with the conical top shaft; the roller is inserted and provided on the main shaft, and a rotating motor for driving its rotation is connected to one end of each group of cloth-passing roller assemblies close to the rotary disk. A dryer is provided at the front end of the shaft-changing mechanism, and the dryer is located below one of the groups of cloth-passing roller assemblies. An electric door assembly is provided on the side of the shaft-changing mechanism close to the printing machine body, and the electric door assembly includes a group of lifting electric doors and four groups of fixed electric doors; the lifting electric door includes an electric door base, an electric door lifting seat, an electric door lifting cylinder and a positive trigger part; the electric door base is fixedly installed on the lifting base; the electric door lifting seat is installed on the electric door base through a slide rail and a slider; the electric door lifting cylinder is installed on the electric door base, and the top end of its piston rod is connected to the electric door lifting seat; the positive trigger part is provided at the top end of the electric door lifting seat; the four groups of fixed electric doors are distributively provided at the bottom of the rotary disk and are respectively provided below the four groups of cloth-passing roller assemblies; a negative trigger part matched with the positive trigger part is provided at the bottom end of each group of fixed electric doors, and the negative trigger part is electrically connected to the rotating motor. A large magnetic wheel assembly is provided on the side of the shaft-changing mechanism close to the dryer; the large magnetic wheel assembly includes a gantry bracket, a reduction motor and a large magnetic wheel; the gantry bracket is fixedly installed on the lifting base; the reduction motor is installed inside the gantry bracket, and its motor shaft extends upward through the gantry bracket; the large magnetic wheel is installed at the end of the motor shaft of the reduction motor and is located below the small magnetic wheel. The lifting base includes a bottom plate and a lifting plate;The bottom plate is mounted on the connecting seat through a slide rail slider, and a guide rod and a lifting screw rod are vertically arranged on the bottom plate; the lifting plate is mounted on the guide rod through a linear bearing, and is connected to the lifting screw rod through a worm gear lift. ;

[0007] Furthermore, a top shaft motor is provided at the rear end of the top shaft lifting plate, and the top shaft motor is transmission-connected to the conical top shaft via a synchronous belt.

[0008] Furthermore, the distance between the top end of the large magnetic wheel and the bottom end of the small magnetic wheel is set to between 0.2 mm and 1 mm.

[0009] Furthermore, the movable cylinder is fixed on the connecting seat, and the end of the piston rod thereof is hingedly connected to the base plate.

[0010] The beneficial effects of the present invention are as follows: 1. A shaft-changing mechanism is arranged on one side of the printing machine body, and the cloth-threading roller assembly is cyclically switched by the shaft-changing mechanism, so that the printing machine body can work continuously without interruption, thereby improving the working efficiency; 2. The cloth-threading roller assembly is rotated to the station of the dryer by the shaft-changing mechanism, and the cloth after printing is dried, without the need to manually transfer the cloth, thereby reducing the labor intensity; 3. The end of the cloth-threading roller assembly is supported by the conical top shaft of the dynamic balancing mechanism, thereby improving the rotation stability of the cloth-threading roller during printing, and ensuring the stability of the printing quality; 4. The height positions of the cloth-threading roller assembly and the conical top shaft can be adjusted, and can be used for printing of cloth-threading rollers of different specifications and sizes; 5. During printing, the wireless power supply of the rotating motor is realized by the electric switch assembly, thereby avoiding the winding problem generated when the wire is connected and rotated, and making the other three groups of rotating motors in a non-powered state, thereby saving power; 6. During drying, the magnetic force generated by the rotation of the large magnetic wheel drives the small magnetic wheel to rotate, thereby driving the cloth-threading roller assembly above the dryer to rotate, and also avoiding the winding problem generated when the wire is connected and rotated. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] Figure 2 It is a structural schematic diagram of the present invention after the drying machine is arranged.

[0013] Figure 3 It is a structural schematic diagram of the printing machine body of the present invention.

[0014] Figure 4 It is a structural schematic diagram of the shaft changing mechanism of the present invention.

[0015] Figure 5 It is a schematic diagram of the installation of the rotary divider of the present invention.

[0016] Figure 6It is the installation schematic diagram of a set of cloth-passing roller assemblies of the present invention.

[0017] Figure 7 It is the structural schematic diagram of the dynamic balance mechanism of the present invention.

[0018] Figure 8 It is the structural schematic diagram of the conical jackshaft of the present invention.

[0019] Figure 9 It is the structural schematic diagram of the dynamic balance mechanism after installing the jackshaft motor of the present invention.

[0020] Figure 10 It is the exploded view of the structure of the cloth-passing roller assembly of the present invention.

[0021] Figure 11 It is the installation schematic diagram of the switch assembly of the present invention.

[0022] Figure 12 It is the structural schematic diagram of the switch assembly of the present invention.

[0023] Figure 13 It is the structural schematic diagram of the lifting switch of the present invention.

[0024] Figure 14 It is the structural schematic diagram of the fixed switch of the present invention.

[0025] Figure 15 It is the installation schematic diagram of the large magnetic wheel assembly of the present invention.

[0026] Figure 16 It is the structural schematic diagram of the large magnetic wheel assembly of the present invention.

[0027] Figure 17 It is the structural schematic diagram of the lifting base of the present invention.

[0028] Figure 18 It is the connection schematic diagram of the mobile cylinder and the lifting base of the present invention.

[0029] Wherein: printing machine body 1, shaft-changing mechanism 2, connecting seat 3, dynamic balance mechanism 4, nozzle 5, mobile cylinder 6, lifting base 7, rotary divider 8, rotary motor 9, rotary disk 10, cloth-passing roller assembly 11, rotating motor 12, dryer 13, jackshaft lifting plate 14, conical jackshaft 15, jackshaft lifting lead screw 16, conical head 17, lead screw seat 18, lead screw motor 19, jackshaft motor 20, roller 21, main shaft 22, pin shaft 23, small magnetic wheel 24, rotating bearing 25, switch assembly 26, lifting switch 27, fixed switch 28, switch base 29, switch lifting seat 30, switch lifting cylinder 31, positive trigger part 32, negative trigger part 33, large magnetic wheel assembly 34, gantry bracket 35, reduction motor 36, large magnetic wheel 37, bottom plate 38, lifting plate 39, guide rod 40, lifting lead screw 41, worm gear and worm elevator 42. Detailed implementation mode

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the following further analyzes the present invention in conjunction with the attached Figure 1-18 drawings.

[0031] As Figure 1-5 shown, an efficient four-axis digital printing machine is characterized in that it includes a printing machine body 1 and a shaft-changing mechanism 2; a connecting seat 3 is provided at the bottom of one side of the printing machine body 1, a dynamic balance mechanism 4 is provided in the middle, and a nozzle 5 is movably provided at the top; the shaft-changing mechanism 2 is movably provided on the connecting seat 3 through a slide rail and slider, and a moving cylinder 6 for driving its movement is provided on the side of the shaft-changing mechanism 2 away from the printing machine body 1; the shaft-changing mechanism 2 includes a lifting base 7 and a rotary indexer 8; the rotary indexer 8 is provided on the lifting base 7, the input end of the rotary indexer 8 is connected with a rotary motor 9 for driving its rotation, and the output end of the rotary indexer 8 is connected with a rotary disc 10; four groups of cloth-passing roller assemblies 11 are distributively provided on the top of the rotary disc 10, and a rotating motor 12 for driving its rotation is connected to one end of each group of cloth-passing roller assemblies 11 close to the rotary disc 10; by driving the rotary indexer 8 to rotate through the rotary inner motor 9, the four groups of cloth-passing roller assemblies 11 on the rotary disc 10 are sequentially rotated under the nozzle 5 for printing, realizing automatic shaft changing.

[0032] In this embodiment, preferably, as Figure 6 shown, a dryer 13 is provided at the front end of the shaft-changing mechanism 2, and the dryer 13 is located below one of the cloth-passing roller assemblies 11. After the printing is completed, the cloth-passing roller assembly 11 is rotated above the dryer 13 by the shaft-changing mechanism 2 to dry the printed cloth.

[0033] In this embodiment, preferably, as Figure 7 、 8 shown, the dynamic balance mechanism 4 includes a top shaft lifting plate 14, a conical top shaft 15 and a top shaft lifting screw rod 16; the top shaft lifting plate 14 is installed on the printing machine body 1 through a slide rail and slider; the conical top shaft 15 is rotatably installed on the top shaft lifting plate 14 through a bearing, and a conical head 17 is integrally provided at one end of the conical top shaft 15; the top shaft lifting screw rod 16 is vertically installed on the printing machine body 1 through a screw rod seat 18, its top end is connected with the top shaft lifting plate 14, and the bottom end is connected with a screw rod motor 19 for driving its rotation. By driving the conical top shaft 15 to rise or fall through the screw rod motor 19 and the top shaft lifting screw rod 16, the height position of the conical top shaft 15 is adjusted to support the use of cloth-passing rollers of different specifications and sizes.

[0034] In this embodiment, preferably, as Figure 9As shown, a jacking shaft motor 20 is provided at the rear end of the jacking shaft lifting plate 14. The jacking shaft motor 20 is drivingly connected to the conical jacking shaft 15 through a synchronous belt. When the conical jacking shaft 15 supports the cloth-passing roller, a jacking shaft motor 20 can be added to drive the conical jacking shaft 15 to rotate synchronously with the cloth-passing roller.

[0035] In this embodiment, preferably, as Figure 10 shown, each group of the cloth-passing roller assemblies 11 includes a roller 21, a main shaft 22, and a pin shaft 23; the pin shaft 23 is rotatably installed on the rotating disk 10 through a bearing seat, and a small magnetic wheel 24 is provided on the pin shaft 23; the main shaft 22 is connected to the pin shaft 23 in an inserted manner, and a rotating bearing 25 is provided at one end of the main shaft 22 away from the pin shaft 23, and the rotating bearing 25 is matched with the conical jacking shaft 15; during printing, the shaft-changing mechanism 2 is driven by a moving cylinder 6 to move towards the printing machine body 1, so that the rotating bearing 25 is docked with the conical head 17 of the conical jacking shaft 15, thereby enabling the conical jacking shaft 15 to support the end of the cloth-passing roller and ensuring its rotational stability during printing; the roller 21 is inserted into the main shaft 22.

[0036] In this embodiment, preferably, as Figure 11-14 shown, an electric switch assembly 26 is provided on one side of the shaft-changing mechanism 2 close to the printing machine body 1. The electric switch assembly 26 includes a set of lifting electric switches 27 and four sets of fixed electric switches 28; the lifting electric switch 27 includes an electric switch base 29, an electric switch lifting seat 30, an electric switch lifting cylinder 31, and a positive triggering part 32; the electric switch base 29 is fixedly installed on the lifting base 7; the electric switch lifting seat 30 is installed on the electric switch base 29 through a slide rail and a slider; the electric switch lifting cylinder 31 is installed on the electric switch base 29, and the top end of its piston rod is connected to the electric switch lifting seat 30; the positive triggering part 32 is provided at the top end of the electric switch lifting seat 30, and the positive triggering part 32 is electrically connected to an external power supply; the four sets of fixed electric switches 28 are distributed at the bottom of the rotating disk 10 and are respectively arranged below the four sets of cloth-passing roller assemblies 11; a negative triggering part 33 matched with the positive triggering part 32 is provided at the bottom end of each set of the fixed electric switches 28, and the negative triggering part 33 is electrically connected to the rotating motor 12; during printing, the electric switch lifting cylinder 31 drives the electric switch lifting seat 30 to rise, so that the positive triggering part 32 contacts the negative triggering part 33, realizing the connection of the rotating motor 12 with the external power supply, and the rotating motor 12 drives the cloth-passing roller below the nozzle 5 to rotate for printing.

[0037] In this embodiment, preferably, as Figure 15 、 16As shown, on one side of the shaft-changing mechanism 2 close to the dryer 13, there is a large magnetic wheel assembly 34; the large magnetic wheel assembly 34 includes a gantry bracket 35, a reduction motor 36, and a large magnetic wheel 37; the gantry bracket 35 is fixedly installed on the lifting base 7; the reduction motor 36 is installed inside the gantry bracket 35, and its motor shaft extends upward through the gantry bracket 35; the large magnetic wheel 37 is installed at the end of the motor shaft of the reduction motor 36 and is located below the small magnetic wheel 24; during drying, the reduction motor 36 drives the large magnetic wheel 37 to rotate, and the magnetic force generated by the rotation of the large magnetic wheel 37 drives the small magnetic wheel 24 to rotate, thereby driving the cloth-passing roller above the dryer to rotate and drying the printed cloth.

[0038] In this embodiment, preferably, the distance between the top end of the large magnetic wheel 37 and the bottom end of the small magnetic wheel 24 is set to be between 0.2 mm and 1 mm. The smaller the distance between the large magnetic wheel 37 and the small magnetic wheel 24, the stronger the acting force of the large magnetic wheel 37 on the small magnetic wheel 24, and it is easier to drive the cloth-passing roller to rotate.

[0039] In this embodiment, preferably, as Figure 17 shown, the lifting base 7 includes a bottom plate 38 and a lifting plate 39; the bottom plate 38 is installed on the connecting seat 3 through a slide rail and slider, and a guide rod 40 and a lifting screw rod 41 are vertically arranged on the bottom plate 38; the lifting plate 39 is installed on the guide rod 40 through a linear bearing and is connected to the lifting screw rod 41 through a worm and worm gear lifter 42. By the relative movement of the worm and worm gear lifter 42 on the lifting screw rod 41, the lifting plate 39 is driven to rise or fall, thereby adjusting the height position of the cloth-passing roller assembly 11 on the shaft-changing mechanism 2, so that the rotating bearing 25 of the cloth-passing roller assembly 11 is docked with the conical top shaft 15 of the dynamic balance mechanism 4.

[0040] In this embodiment, preferably, as Figure 18 shown, the moving cylinder 6 is fixedly arranged on the connecting seat 3, and the end of its piston rod is hinged to the bottom plate 38.

[0041] Specific working principle of the present invention: The four sets of cloth-passing roller assemblies 11 are sequentially divided into a loading and unloading station, a waiting station, a printing station, and a drying station in a clockwise rotation direction starting from the set farthest from the printing machine body 1; initially, an operator sets the cloth to be printed on the roller 21 of the cloth-passing roller assembly 11 at the loading and unloading station, the indexing cam 8 rotates one station, and the cloth-passing roller assembly 11 with the cloth set is rotated to the waiting station. The operator continues to set the cloth on the next cloth-passing roller assembly 11 entering the loading and unloading station at the loading and unloading station. The indexing cam 8 rotates one more station, and the cloth-passing roller assembly 11 at the original waiting station is rotated under the nozzle 5 of the printing machine body 1. The piston rod of the moving cylinder 6 extends, driving the shaft-changing mechanism 2 to move towards the printing machine body 1, so that the rotating bearing 25 of the cloth-passing roller assembly 11 is docked with the conical top shaft 15 of the dynamic balance mechanism 4. At the same time, the numerical control host controls the lifting switch 27 to rise, so that the positive trigger part 32 contacts the negative trigger part 33, energizing the rotating motor 12 of the cloth-passing roller assembly 11 and driving the cloth-passing roller assembly 11 to rotate for rotary printing under the nozzle 5; after printing is completed, the numerical control host controls the lifting switch 27 to descend, so that the positive trigger part 32 leaves the negative trigger part 33. After the rotating motor 12 of the cloth-passing roller assembly 11 is powered off and stops running, the indexing cam 8 rotates one more station, rotating the cloth-passing roller assembly 11 after printing to above the dryer 13. The numerical control host controls the reduction motor 36 to operate, driving the large magnetic wheel 37 to rotate by the reduction motor 36, and driving the small magnetic wheel 24 to rotate by the magnetic force generated by the rotation of the large magnetic wheel 37, thereby driving the cloth-passing roller assembly 11 to rotate to dry the cloth after printing; after drying is completed, the indexing cam 8 continues to rotate one station, rotating the cloth-passing roller assembly 11 after drying to the loading and unloading station. The operator removes the dried cloth and sets a new cloth to be printed, and so on, continuously repeating the above actions. The cloth-passing roller assemblies 11 are cyclically switched through the shaft-changing mechanism 2, enabling the printing machine body 1 to continuously work without interruption, thereby improving work efficiency.

[0042] The four-axis digital printing machine involved in the present invention is provided with a shaft-changing mechanism 2 on one side of the printing machine body 1. The cloth-passing roller assembly 11 is cyclically switched through the shaft-changing mechanism 2, so that the printing machine body 1 can continuously work without interruption, improving work efficiency; and the cloth-passing roller assembly 11 is rotated to the working position of the dryer 13 by the shaft-changing mechanism 2 to dry the printed cloth, without manual transfer of the cloth, reducing labor intensity; the end of the cloth-passing roller assembly 11 is supported by the conical top shaft 15 of the dynamic balance mechanism 4 to improve the rotational stability of the cloth-passing roller assembly 11 during printing, ensuring the stability of printing quality; the height positions of the cloth-passing roller assembly 11 and the conical top shaft 15 are adjustable and can be applied to printing with cloth-passing rollers of different specifications and sizes; during printing, the rotation motor 12 is wirelessly powered through the electric switch assembly 26, avoiding the winding problem generated when the wire is connected and rotated, and making the other three rotation motors 12 in a non-powered state, saving power; during drying, the small magnetic wheel 24 is driven to rotate by the magnetic force generated by the rotation of the large magnetic wheel 37, thereby driving the cloth-passing roller assembly 11 above the dryer to rotate, also avoiding the winding problem generated when the wire is connected and rotated.

[0043] The technical solutions provided in this application have been introduced in detail above. In this article, the principles and implementation manners of this application have been elaborated by using embodiments. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. An efficient four-axis digital printing machine, characterized in that: It includes a printing machine body and a shaft-changing mechanism; a connecting seat is provided at the bottom on one side of the printing machine body, a dynamic balance mechanism is provided in the middle, and a nozzle is movably provided at the top. The dynamic balance mechanism includes a top shaft lifting plate, a conical top shaft, and a top shaft lifting screw rod; the top shaft lifting plate is installed on the printing machine body through a slide rail and slider; the conical top shaft is rotatably installed on the top shaft lifting plate through a bearing, and a conical head is integrally provided at one end of the conical top shaft; the top shaft lifting screw rod is vertically installed on the printing machine body through a screw rod seat, its top end is connected to the top shaft lifting plate, and its bottom end is connected to a screw rod motor that drives its rotation; the shaft-changing mechanism is movably provided on the connecting seat through a slide rail and slider, and a moving cylinder that drives its movement is provided on the side of the shaft-changing mechanism away from the printing machine body; the shaft-changing mechanism includes a lifting base and a rotary indexer; the rotary indexer is provided on the lifting base, the input end of the rotary indexer is connected to a rotary motor that drives its rotation, and the output end of the rotary indexer is connected to a rotary disk; four groups of cloth-passing roller assemblies are distributed on the top of the rotary disk, and each group of cloth-passing roller assemblies includes a roller, a main shaft, and a pin shaft; the pin shaft is rotatably installed on the rotary disk through a bearing seat, and a small magnetic wheel is provided on the pin shaft; the main shaft is inserted and connected to the pin shaft, and a rotating bearing is provided at one end of the main shaft away from the pin shaft, and the rotating bearing is matched with the conical top shaft; the roller is inserted on the main shaft, and a rotating motor that drives its rotation is connected to one end of each group of cloth-passing roller assemblies close to the rotary disk. A dryer is provided at the front end of the shaft-changing mechanism, the dryer is located below one of the groups of cloth-passing roller assemblies, and an electric door assembly is provided on the side of the shaft-changing mechanism close to the printing machine body. The electric door assembly includes a group of lifting electric doors and four groups of fixed electric doors; the lifting electric door includes an electric door base, an electric door lifting seat, an electric door lifting cylinder, and a positive trigger part; the electric door base is fixedly installed on the lifting base; the electric door lifting seat is installed on the electric door base through a slide rail and slider; the electric door lifting cylinder is installed on the electric door base, and the top end of its piston rod is connected to the electric door lifting seat; the positive trigger part is provided at the top end of the electric door lifting seat; the four groups of fixed electric doors are distributed at the bottom of the rotary disk and are respectively provided below the four groups of cloth-passing roller assemblies; a negative trigger part that is matched with the positive trigger part is provided at the bottom end of each group of fixed electric doors, and the negative trigger part is electrically connected to the rotating motor. A large magnetic wheel assembly is provided on the side of the shaft-changing mechanism close to the dryer; the large magnetic wheel assembly includes a gantry bracket, a reduction motor, and a large magnetic wheel; the gantry bracket is fixedly installed on the lifting base; the reduction motor is installed inside the gantry bracket, and its motor shaft extends upward through the gantry bracket; the large magnetic wheel is installed at the end of the motor shaft of the reduction motor and is located below the small magnetic wheel. The lifting base includes a bottom plate and a lifting plate;The bottom plate is installed on the connecting seat through a slide rail and a slider. A guide rod and a lifting screw rod are vertically arranged on the bottom plate. The lifting plate is installed on the guide rod through a linear bearing and is connected to the lifting screw rod through a worm and worm gear lifter.

2. An efficient four-axis digital printing machine according to claim 1, characterized in that: A jacking shaft motor is provided at the rear end of the jacking shaft lifting plate, and the jacking shaft motor is drivingly connected to the conical jacking shaft through a synchronous belt.

3. An efficient four-axis digital printing machine according to claim 1, characterized in that: The distance between the top end of the large magnetic wheel and the bottom end of the small magnetic wheel is set to be between 0.2 mm and 1 mm.

4. An efficient four-axis digital printing machine according to claim 1, characterized in that: The moving cylinder is fixedly arranged on the connecting seat, and the end of its piston rod is hinged to the bottom plate.

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