CN111098495A

CN111098495A - High-speed high-precision triaxial movement printing equipment

Info

Publication number: CN111098495A
Application number: CN201911135370.5A
Authority: CN
Inventors: 梁彦辉
Original assignee: Anhui Yingkai High Tech Co Ltd
Current assignee: Anhui Yingkai High Tech Co Ltd
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-05-05

Abstract

The invention discloses high-speed high-precision triaxial movement printing equipment, wherein a printing head of the printing equipment moves back and forth through an X-direction transmission shaft rod, a Y-direction transmission shaft and two Y-direction lead screw transmissions on a large frame driven by a first servo motor, moves left and right through an X-direction lead screw transmission on a beam structure driven by a second servo motor, and moves up and down through the driving of a third motor directly connected with the beam structure. The printing head of the printing equipment provided by the invention moves through the transmission drive of the screw rod, the moving speed is high, the vibration is avoided in the moving process, the moving track is stable, and the precision is high.

Description

High-speed high-precision triaxial movement printing equipment

Technical Field

The invention relates to the field of printing equipment, in particular to high-speed high-precision triaxial movement printing equipment.

Background

Printing devices are common tools in modern society, and especially current 3D printers can be used to print many delicate products, such as conductive films. The conductive film is a thin film having a conductive function, and charged carriers of the conductive thin film are scattered by surfaces and interfaces during transport, and when the thickness of the thin film is comparable to the free path of electrons, the influence on the surfaces and the interfaces becomes significant, which is called a size effect of the thin film, which is equivalent to a free path reduction of carriers, and thus the conductivity of the thin film is small compared to a bulk of the same material. The existing conductive film is provided with a plurality of uniformly distributed 10-15 micron ultra-fine wires, and the ultra-fine wires need to be printed by a three-axis motion printing device.

The printing head of the existing three-axial motion printing equipment generally moves by adopting a belt conveying principle, but the belt conveying movement mode is low in speed, the shaking phenomenon is serious in the movement process, the stable movement of the printing head cannot be guaranteed, and finally the precision is low.

Disclosure of Invention

Aiming at the problems of the existing triaxial movement printing equipment, the invention aims to provide the high-speed high-precision triaxial movement printing equipment, and the printing head of the printing equipment has the advantages of high moving speed, no jitter in the high-speed moving process, stable printing and high precision.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

a high-speed high-precision three-axial motion printing device comprises a large frame and a small frame, wherein the small frame is arranged on the large frame, used for placing a working table surface, the large frame is used for enabling the printing head to move in three axial directions and consists of a front frame edge, a rear frame edge, a left frame edge and a right frame edge, a rotatable X-direction transmission shaft is arranged between the left frame edge and the right frame edge, a rotatable Y-direction transmission shaft, a rotatable first Y-direction screw rod and a rotatable second Y-direction screw rod are arranged between the front frame edge and the rear frame edge, when viewed downwards in the direction vertical to the large frame, the first Y-direction screw rod and the second Y-direction screw rod are both parallel to the Y-direction transmission shaft and are respectively positioned at two sides of the Y-direction transmission shaft, the Y-direction transmission shaft is positioned above the X-direction transmission shaft, and the first Y-direction screw rod and the second Y-direction screw rod are positioned below the X-direction transmission shaft; the X-direction transmission shaft and the Y-direction transmission shaft are in gear transmission, and the X-direction transmission shaft, the first Y-direction screw rod and the second Y-direction screw rod are in gear transmission; the first Y-direction screw rod and the second Y-direction screw rod are respectively provided with a sliding block for supporting an X-direction beam, and the X-direction beam is provided with a printing head, wherein the sliding blocks are driven by the first Y-direction screw rod and the second Y-direction screw rod to move back and forth through synchronous rotation, so that the X-direction beam and the printing head arranged on the X-direction beam move back and forth (namely, move along the Y-axis direction).

Further, Y is connected with first servo motor to a terminal of transmission shaft to be provided with first initiative taper gear on its peripheral surface, X has set gradually second initiative taper gear, first driven taper gear and third initiative taper gear from the left hand right side on to the peripheral surface of transmission shaft, first Y is to the lead screw with second Y is provided with second driven taper gear and third driven taper gear on to the peripheral surface of lead screw respectively. The second driven bevel gear engages the second drive bevel gear, the first driven bevel gear engages the first drive bevel gear, and the third drive bevel gear engages the third driven bevel gear. Work as Y is in to the transmission shaft drive when rotating under the drive of servo motor first initiative conical gear rotates, first initiative conical gear rotates and drives first driven conical gear rotates, first driven conical gear rotates and drives X rotates to the transmission shaft, X rotates to the transmission shaft and drives second initiative conical gear with third initiative conical gear rotates, second initiative conical gear with third initiative conical gear rotates and drives respectively driven conical gear of second with driven conical gear rotates of third, driven conical gear of second with driven conical gear rotates and drives respectively first Y to the lead screw with second Y is to the synchronous rotation of lead screw.

Furthermore, an X-direction screw rod is arranged on the X-direction cross beam, the printing head is installed on the X-direction screw rod, and the X-direction screw rod is driven by a second servo motor to rotate so as to drive the printing head to move left and right.

Further, the peripheral surface that the X is to the lead screw with the installation position contact of beating printer head is provided with the screw thread, beat printer head installation position and be provided with the installation through-hole for cup joint X is to the lead screw, and the installation through-hole internal surface is provided with corresponding screw thread, and like this when the X rotates to the lead screw, beat printer head and can move about (i.e. move along X axle direction).

Further, the print head is driven to move up and down (i.e., in the Z-axis direction) by a third servo motor directly connected thereto.

Further, the third servo motor is a voice coil motor.

Furthermore, the first servo motor is positioned outside the rear frame edge of the large frame, and the X-direction transmission shaft is positioned in the front half part of the large frame and close to the front frame edge of the large frame.

Furthermore, the slider is provided with a slider through hole for sleeving the first Y-direction lead screw and the second Y-direction lead screw, threads are arranged on the peripheral surfaces of the first Y-direction lead screw and the second Y-direction lead screw, which are in contact with the slider, and threads are correspondingly arranged on the inner surface of the slider through hole, so that the first Y-direction lead screw and the second Y-direction lead screw can drive the two sliders to synchronously move back and forth when synchronously rotating.

Furthermore, Y-direction slide rails are respectively arranged on the upper surfaces of the right frame edge and the left frame edge of the large frame, the sliding block is further provided with an open slot to form a Z-direction slide rail, and the Z-direction slide rail is matched with the Y-direction slide rail, so that the sliding block can only advance along the slide rail when moving back and forth.

Furthermore, Z has the layer of polishing to the inner wall connection of slide, the layer of polishing is polished smoothly, makes Z follows to the slide Y slides when moving to the slide rail more smoothly, and the resistance is little.

Furthermore, the open slot of the slider and the slider through hole are respectively arranged at the upper end and the lower end of the slider.

Further, an X-direction slit is formed in the bottom of the X-direction beam, the printing head slides in the X-direction slit, and the tail end of the printing head extends out of the X-direction slit.

Furthermore, the outer surface of each frame edge of the large frame is galvanized, so that the oxidation resistance is better.

Further, the surface of first servo motor scribbles heat conduction silica gel, is favorable to the inside heat dissipation of first servo motor.

Compared with the prior belt transmission printing equipment, the invention has the advantages that:

the printing head of the printing equipment of the invention moves back and forth through an X-direction transmission shaft, a Y-direction transmission shaft and two Y-direction screw rods on a large frame driven by a first servo motor, moves left and right through an X-direction screw rod transmission on a beam structure driven by a second servo motor, and moves up and down through the drive of a third motor directly connected with the beam structure. Compared with the existing belt transmission printing equipment, the printing head of the printing equipment disclosed by the invention moves in three axial directions by utilizing the screw rod transmission, the moving mode can greatly improve the moving speed of the printing head (up to 0.2 m/s), is improved by more than 50% compared with the moving speed of the common printing head which moves through the belt transmission, and can greatly improve the stability of the printing head in the moving process, so that the printing head does not shake in the printing process, and the working precision is high.

Drawings

Fig. 1 is a schematic view of the overall configuration of a printing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the printing apparatus of FIG. 1 after removal of the countertop.

Fig. 3 is a schematic structural diagram of a large frame composed of four frame sides of the printing apparatus according to an embodiment of the present invention.

Fig. 4 is a schematic view of a large frame of a printing apparatus according to an embodiment of the present invention, which includes four rims, an X-directional transmission shaft, a Y-directional transmission shaft, two Y-directional lead screws, and sliders mounted on the second and second Y-directional lead screws.

Fig. 5 is a schematic structural diagram of a slider.

Fig. 6 is a schematic connection diagram of the slider, the Y-direction slide rail and the first Y-direction screw.

Fig. 7 is an enlarged schematic view of the structure of the region a in fig. 1.

Fig. 8 is an enlarged schematic view of the structure of the region B in fig. 1.

Number designations in fig. 1-8 indicate:

1-large frame, 2-small frame, 3-Y direction slideway, 4-first servo motor, 5-workbench surface, 6-Y direction slideway, 7-slide block, 71-slide block through hole, 8-Z direction slideway, 9-supporting foot, 10-X direction beam, 11-second servo motor, 12-X direction screw rod, 13-third servo motor, 14-X direction slideway, 15-printing head, 16-Y direction transmission shaft, 17-fixed block, 18-first Y direction screw rod, 19-second Y direction screw rod, 20-X direction transmission shaft, 21-first driving bevel gear, 22-first driven bevel gear, 23-second driving bevel gear, 24-third driving bevel gear, 25-third driven bevel gear and 26-second driven bevel gear.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. For example, in the description of the present invention, in the coordinate orientation shown in fig. 1, in the plane defined by the X axis and the Y axis, the frame side of the large frame parallel to the X axis and close to the X axis is referred to as the front frame side, the frame side of the large frame parallel to the X axis and far from the X axis is referred to as the rear frame side, the frame side of the large frame parallel to the Y axis and close to the Y axis is referred to as the left frame side, and the side of the large frame parallel to the Y axis and far from the Y axis is referred to as the right side; in the coordinate orientation shown in fig. 4, one end of the Y-axis transmission shaft and the Y-axis screw near the X-axis is referred to as a front end, and the opposite end is a rear end.

In the description of the present invention, "X direction" means extending in the X axis direction in the coordinate orientation shown in, for example, fig. 1. "Y-direction" means extending in the Y-axis direction in the coordinate orientation shown in FIG. 1, for example. "Z-direction" means extending in the Z-axis direction in the coordinate orientation shown in FIG. 1, for example.

The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As in the overall schematic view of the printing apparatus shown in fig. 1, the printing apparatus includes a large frame 1 and a small frame 2. The small frame 2 includes a work top 5 provided on an upper surface thereof. The large frame 1 comprises a Y-direction slideway 3 respectively arranged on the upper surfaces of a left frame edge and a right frame edge of the large frame, a Y-direction slide rail 6 arranged in the Y-direction slideway 3, and a first servo motor 4 arranged on the outer side of the rear frame edge of the large frame 1. The slide block 7 is arranged on the Y-direction slide rail 6 and is supported with an X-direction beam 10 on the upper surface, an X-direction screw rod 12 is arranged on the X-direction beam 10, and a printing head 15 is arranged on the X-direction screw rod 12.

Fig. 2 is a schematic view of the printing apparatus shown in fig. 1, with the small frame 2 remaining after the removal of the work top 5. As can be seen from this figure, the small frame 2 is entirely located above the large frame 1. The small frame 2 is similar to the large frame 1 in shape and is formed by connecting four frame edges, and can also be integrally formed. The small frame 2 can be fixed on the large frame 1 by connecting the front frame edge and the rear frame edge of the small frame to the front frame edge and the rear frame edge of the large frame 1 respectively by welding, rivet connection, screw and bolt connection, and the like. A plurality of evenly distributed ribs 17 are arranged between the left frame edge and the right frame edge of the small frame 2, and the ribs 17 are used for enabling the structure of the small frame 2 to be more stable. In this figure, the work top 5 of the upper surface of the small frame 2 is removed in order to more clearly show the internal structure of the small frame 2. The work surface 5 can be attached to the small frame 2 by welding, riveting or screw and bolt connections. The upper surface of the countertop 5 may be used to place printed items. For example, when printing a wiring layer of a conductive film including a top PET film, a bottom PET film, and a plurality of wiring layers, the bottom PET film may be first placed on the work table 5, and then the printing of the wiring layer may be performed on the bottom PET film.

As shown in FIG. 3, the large frame 1 is formed by connecting four frame edges or integrally formed, and the outer surface of each frame edge is galvanized, so that the galvanized surface has better oxidation resistance.

As shown in fig. 1 and 2, the upper surfaces of the left and right frames of the large frame 1 are both provided with an open slot with an upward opening, the slot forms a Y-direction slideway 3, a Y-direction slide rail 6 is installed in the Y-direction slideway 3, and the Y-direction slide rail 6 is matched with a Z-direction slideway 8 of a slider 7 (see fig. 7) for enabling the slider 7 to only perform Y-direction movement along the Y-direction slide rail, so as to limit the slider 7.

As shown in fig. 4, a first servo motor 4 is connected to the outside of the rear frame side of the large frame 1. A rotatable X-direction transmission shaft 20 is arranged between the left frame edge and the right frame edge of the large frame 1, a rotatable Y-direction transmission shaft 16, a rotatable first Y-direction screw rod 18 and a rotatable second Y-direction screw rod 19 are arranged between the front frame edge and the rear frame edge. The first servo motor 4 is electrically connected to an external power source, and an output end thereof is connected to a rear end of the Y-directional transmission shaft 16 to drive the Y-directional transmission shaft 16. The surface of the first servo motor 4 is coated with heat-conducting silica gel, and the heat-conducting silica gel has good heat-conducting property and is beneficial to heat dissipation inside the first servo motor 4 (the first servo motor 4 can be MHMJ042G1U in the loose model). The other end of the Y-directional transmission shaft 16 is rotatably connected to the inner side of the front frame side of the large frame 1, so that the output end of the first servo motor 4 rotates to drive the Y-directional transmission shaft 16 to rotate.

When viewed downward in a direction perpendicular to the metro frame 1 (i.e., the Z-axis direction), the X-directional transmission shaft 20 is located below the Y-directional transmission shaft 16, the first Y-directional lead screw 18 and the second Y-directional lead screw 19 are located below the X-directional transmission shaft 20, and the first Y-directional lead screw 18 and the second Y-directional lead screw 19 are both parallel to the Y-directional transmission shaft 16 and are respectively located at both sides of the Y-directional transmission shaft 16.

As shown in fig. 4, the X-direction transmission shaft 20 is provided at the front end of the large frame 1, i.e., near the front frame side of the large frame 1. A first driving bevel gear 21 is provided on the front end outer peripheral surface of the Y-directional transmission shaft 16. A second driving bevel gear 23, a first driven bevel gear 22 and a third driving bevel gear 24 are sequentially provided on the outer circumferential surface of the X-directional transmission shaft 20 from left to right. The first and second Y-direction screws 18 and 19 are provided on the front end outer peripheral surfaces thereof with second and third driven

bevel gears

26 and 25, respectively. The second driven bevel gear 26 engages the second driving bevel gear 23, the first driven bevel gear 22 engages the first driving bevel gear 21, and the third driving bevel gear 24 engages the third driven bevel gear 25. The rotation of the Y-direction transmission shaft 16 drives the first driving bevel gear 21 to rotate, the rotation of the first driving bevel gear 21 drives the first driven bevel gear 22 to rotate, the rotation of the first driven bevel gear 22 drives the X-direction transmission shaft 20 to rotate, and the rotation of the X-direction transmission shaft 20 drives the second driving bevel gear 23 and the third driving bevel gear 24 to rotate. The second driving bevel gear 23 and the third driving bevel gear 24 rotate to drive the second driven bevel gear 26 and the third driven bevel gear 25 to rotate respectively, and the second driven bevel gear 26 and the third driven bevel gear 25 rotate to drive the first Y-direction screw rod 18 and the second Y-direction screw rod 19 to rotate respectively. In this way, the rotation of the first Y-lead screw 18 and the second Y-lead screw 19 is synchronized.

The first Y-direction screw rod 18 and the second Y-direction screw rod 19 are both provided with a slide block 7. The lower end of the slider 7 is provided with a slider through-hole 71 (see fig. 5). The slide block through hole 71 is sleeved with the first Y-direction screw rod 18 or the second Y-direction screw rod 19. The outer peripheral surfaces of the areas of the first Y-direction screw rod 18 and the second Y-direction screw rod 19, which are in contact with the sliders 7, are provided with threads (see fig. 6), and the inner surfaces of the slider through holes 71 are correspondingly provided with threads, so that the first Y-direction screw rod 18 and the second Y-direction screw rod 19 can drive the two sliders 7 to synchronously move back and forth on the first Y-direction screw rod 18 and the second Y-direction screw rod 19 when synchronously rotating. An open slot (see fig. 5) is formed at the upper end of the slider 7 to form a Z-direction slideway 8, so that the Z-direction slideway 8 is slidably mounted on the Y-direction slide rail 6. The shape of the open groove is not particularly limited as long as the slider 7 can be mounted on the Y-direction slide rail 6 through the open groove. Z has the layer of polishing to the inner wall connection of slide 8, and the layer of polishing is polished smoothly, and it is more smooth and easy to slide on Y is to slide rail 6. The height of the Z-direction slide way 8 is less than that of the slide block 7. Thus, the slide block 7 moves along the slide rail 6 under the restriction of the Y-direction slide rail 6 while synchronously moving back and forth under the driving of the rotation of the first Y-direction screw rod 18 and the second Y-direction screw rod 19. The connection mode of the slide block 7 and the Y-direction screw rod and the slide rail 6 is shown in figure 6. The slide block 7 is driven by the threaded screw rod to move in the Y direction, and meanwhile, the slide block 7 is limited by the Y-direction slide rail, so that the slide block 7 is more stable in the front and back moving process.

As shown in fig. 6 and 7, a support foot 9 is provided on the upper surface of each slider 7 to support the X-beam 10. The support feet 9 may be cylindrical, rectangular or the like, and preferably are adjustable in length so that the height of the X-beam 10 from the work surface (5) can be set according to the height of the printed article. The upper end of each supporting foot 9 is connected to both ends of an X-beam 10, respectively (see fig. 3). When the pair of sliders 7 synchronously move back and forth, the X-direction beam 10 moves back and forth, and the print head 15 on the X-direction beam 10 moves back and forth, namely, in the Y-axis direction. The moving speed can reach 0.2 m/s.

As shown in fig. 1, 2 and 8, the X-beam 10 may be a frame structure provided with X-screws 12 penetrating the left and right lengths thereof. The X-direction lead screw 12 is used for mounting the print head 15. The bottom of the frame structure of the X-beam 10 is provided with slits forming X-slides 14 in which the print heads 15 slide. The end of the print head 15 projects X through the slide 14 towards the bottom surface of the cross beam 10 and above the work surface 5. The right side end of the cross beam 10 is connected with a second servo motor 11. The second servo motor 11 is electrically connected with an external power supply, and the output end of the second servo motor is connected with the right tail end of the X-direction lead screw 12 to play a role in driving the X-direction lead screw 12 (the X-direction servo motor 11 can be in a loose MHMJ042G1U type). The left end of the X-direction screw rod 12 is rotatably connected to the left end face of the cross beam 10. The outer peripheral surface of the X-direction screw rod 12 contacting with the installation part of the printing head 15 is provided with threads, the installation part of the printing head 15 is sleeved on the X-direction screw rod 12 through an installation through hole, and the inner surface of the installation through hole is correspondingly provided with threads. Thus, when the X-direction screw rod 12 rotates, the print head 15 is driven to move left and right, i.e. to move along the X-axis direction. The moving speed can reach 0.2 m/s.

The mounting location of the print head 15 may be the third servo motor 13. The third servo motor 13 is connected to an external power supply, and an output end thereof is connected to the print head 15, and directly drives the print head 15 to move up and down, that is, to move along the Z-axis direction. The moving speed can reach 0.2 m/s. The third servo motor 13 may be a voice coil motor (which may be of the type TMEC 0070-015). The voice coil motor drives the print head 15 to move up and down is a characteristic of the voice coil motor itself, and is the prior art and not described in more detail here.

The operating principle of the printing apparatus of the present embodiment is: when the first servo motor 4, the second servo motor 11 and the third servo motor 13 are started simultaneously, the output end of the first servo motor 4 rotates to drive the Y-direction transmission shaft 16 to rotate, the Y-direction transmission shaft 16 rotates to drive the first driving bevel gear 21 to rotate, the first driving bevel gear 21 rotates to drive the first driven bevel gear 22 to rotate, the first driven bevel gear 22 rotates to drive the X-direction transmission shaft 20 to rotate, the X-direction transmission shaft 20 rotates to drive the second driving bevel gear 23 and the third driving bevel gear 24 to rotate simultaneously, the second driving bevel gear 23 and the third driving bevel gear 24 rotate to drive the second driven bevel gear 26 and the third driven bevel gear 25 to rotate respectively, the second driven bevel gear 26 and the third driven bevel gear 25 rotate to drive the first Y-direction screw rod 18 and the second Y-direction screw rod 19 to rotate respectively, and the first Y-direction screw rod 18 and the second Y-direction screw rod 19 rotate to drive the pair of sliders 7 to synchronously move back and forth, the pair of sliding blocks 7 moves back and forth and drives the X-direction beam 10 to move back and forth through the pair of supporting feet 9, and finally drives the printing head 15 on the X-direction beam 10 to move back and forth. The output end of the second servo motor 11 rotates to drive the X-direction screw rod 12 to rotate, and the X-direction screw rod 12 rotates to drive the printing head 15 arranged on the X-direction screw rod to move left and right. Thus, the print head 15 can move both forward and backward and leftward and rightward. Meanwhile, the output end of the third servo motor 13 is directly connected with the printing head 15, and the third servo motor 13 can drive the printing head 15 to move up and down linearly by operating. In this way, the print head 15 can be moved (moved) in three axial directions to perform printing.

The printing head of the printing equipment can adopt high-precision screw rod transmission to replace common belt transmission in three axial directions, can still ensure the stable movement of the equipment without shaking under the condition of increasing the speed by more than 50 percent, and ensures the working precision of the printing head.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.

Claims

1. A high-speed high-precision three-axial motion printing apparatus comprising a large frame (1) and a small frame (2), the small frame (2) being disposed above the large frame (1) for placing a work table (5), the large frame (1) being used for moving a printing head (15) in three axial directions, characterized in that: the large frame (1) consists of a front frame edge, a rear frame edge, a left frame edge and a right frame edge, a rotatable X-direction transmission shaft (20) is arranged between the left frame edge and the right frame edge, a rotatable Y-direction transmission shaft (16), a rotatable first Y-direction screw rod (18) and a rotatable second Y-direction screw rod (19) are arranged between the front frame edge and the rear frame edge,

when viewed downwards in the direction of the large frame (1), the first Y-direction screw rod (18) and the second Y-direction screw rod (19) are both parallel to the Y-direction transmission shaft (16) and are respectively positioned at two sides of the Y-direction transmission shaft (16), the Y-direction transmission shaft (16) is positioned above the X-direction transmission shaft (20), the first Y-direction screw rod (18) and the second Y-direction screw rod (19) are positioned below the X-direction transmission shaft (20),

the X-direction transmission shaft (20) and the Y-direction transmission shaft (16) are in gear transmission, and the X-direction transmission shaft (20), the first Y-direction screw rod (18) and the second Y-direction screw rod (19) are in gear transmission,

the first Y-direction screw rod (18) and the second Y-direction screw rod (19) are respectively provided with a sliding block (7) used for supporting an X-direction beam (10), a printing head (15) is mounted on the X-direction beam (10), and the sliding block (7) is driven to move back and forth by synchronous rotation of the first Y-direction screw rod (18) and the second Y-direction screw rod (19), so that the X-direction beam (10) and the printing head (15) mounted on the X-direction beam (10) move back and forth.

2. The high-speed high-precision triaxial motion printing apparatus according to claim 1, wherein: one end of the Y-direction transmission shaft (16) is connected with the first servo motor (11), a first driving bevel gear (21) is arranged on the outer peripheral surface of the Y-direction transmission shaft, a second driving bevel gear (23), a first driven bevel gear (22) and a third driving bevel gear (24) are sequentially arranged on the outer peripheral surface of the X-direction transmission shaft (20) from left to right, a second driven bevel gear (26) and a third driven bevel gear (25) are respectively arranged on the outer peripheral surfaces of the first Y-direction screw rod (18) and the second Y-direction screw rod (19),

the second driven bevel gear (26) engaging the second driving bevel gear (23), the first driven bevel gear (22) engaging the first driving bevel gear (21), the third driving bevel gear (24) engaging the third driven bevel gear (25),

the Y-direction transmission shaft (16) is driven by the first servo motor (11) to rotate so as to drive the first driving bevel gear (21) to rotate, the first driving bevel gear (21) rotates to drive the first driven bevel gear (22) to rotate, the first driven bevel gear (22) rotates to drive the X-direction transmission shaft (20) to rotate, the X-direction transmission shaft (20) rotates to drive the second driving bevel gear (23) and the third driving bevel gear (24) to rotate, the second driving bevel gear (23) and the third driving bevel gear (24) rotate to drive the second driven bevel gear (26) and the third driven bevel gear (25) to rotate respectively, the second driven bevel gear (26) and the third driven bevel gear (25) rotate to respectively drive the first Y-direction screw rod (18) and the second Y-direction screw rod (19) to synchronously rotate.

3. The high-speed high-precision triaxial motion printing apparatus according to claim 1 or 2, wherein: an X-direction screw rod (12) is arranged on the X-direction cross beam (10), the printing head (15) is installed on the X-direction screw rod (12), the X-direction screw rod (12) is driven by a second servo motor (11) to rotate, and the printing head (15) is driven to move left and right.

4. The high-speed high-precision triaxial motion printing apparatus according to claim 1 or 2, wherein: the print head (15) is driven to move up and down by a third servo motor (13) directly connected thereto.

5. The high-speed high-precision triaxial motion printing apparatus according to claim 4, wherein: the third servo motor (13) is a voice coil motor.

6. The device for moving a print head of a printer back and forth according to claim 1 or 2, characterized in that: the sliding block (7) is provided with a sliding block through hole (71) for being sleeved with the first Y-direction screw rod (18) and the second Y-direction screw rod (19), threads are arranged on the outer peripheral surface, in contact with the sliding block (7), of the first Y-direction screw rod (18) and the second Y-direction screw rod (19), threads are correspondingly arranged on the inner surface of the sliding block through hole (71), and therefore the first Y-direction screw rod (18) and the second Y-direction screw rod (19) can be driven to synchronously move back and forth when synchronously rotating.

7. The high-speed high-precision triaxial motion printing apparatus according to claim 1 or 2, wherein: y-direction slide rails (6) are respectively arranged on the upper surfaces of the right frame edge and the left frame edge of the large frame (1),

the sliding block (7) is further provided with an open slot to form a Z-direction slide way (8), and the Z-direction slide way (8) is matched with the Y-direction slide rail (6) so that the sliding block (7) can only move forward along the slide rail (6) when moving back and forth.

8. The high-speed high-precision triaxial motion printing apparatus according to claim 1 or 2, wherein: the bottom of the X-direction cross beam (10) is provided with an X-direction slit for the printing head (15) to slide in, and the tail end of the printing head (15) extends out of the X-direction slit.

9. The high-speed high-precision triaxial motion printing apparatus according to claim 1 or 2, wherein: the outer surface of each frame edge of the large frame (1) is galvanized.

10. The high-speed high-precision triaxial motion printing apparatus according to claim 1 or 2, wherein: the surface of the first servo motor (4) is coated with heat-conducting silica gel.