WO2019061928A1

WO2019061928A1 - Laser drive mechanism and 3d printer

Info

Publication number: WO2019061928A1
Application number: PCT/CN2018/000090
Authority: WO
Inventors: 窦鹤鸿
Original assignee: 窦鹤鸿
Priority date: 2017-09-30
Filing date: 2018-03-06
Publication date: 2019-04-04
Also published as: CN107471640A

Abstract

A laser drive mechanism (100) and a 3D printer (200). The laser drive mechanism (100) comprises a rail assembly (110), a master carrier (120), a slave carrier (140), and a laser emission device (150). The master carrier (120) is movably connected to the rail assembly (110). A guide rail of the rail assembly (110) provides the master carrier (120) with a curved moving path. The slave carrier (140) is movably connected to the master carrier (120), and is movable relative to the master carrier (120) in a radial direction of the curved guide rail. The laser emission device (140) is provided at the slave carrier (140). The 3D printer (200) comprises the above laser drive mechanism (100) and a workbench (210). The laser emission device (150) can selectively sinter or melt a powdery printing material on the workbench (210) at different positions of a sector-shaped surface (or a circular surface) according to movement of the master carrier (120) and the slave carrier (140). Accordingly, the 3D printer (200) equipped with the laser drive mechanism (100) has a large printing range.

Description

Laser driving mechanism and 3D printer

Technical field

The present invention relates to the field of 3D printing technology, and in particular to a laser driving mechanism and a 3D printer.

Background technique

3D printer, also known as 3D printer (3DP), is a cumulative manufacturing technology, a machine for rapid prototyping. It is based on digital model files (CAD) and uses special wax, powdered metal or plastic. A technique for making a three-dimensional object by printing a layer of adhesive material, such as an adhesive material. At this stage, 3D printers are used to make products. Some systems use the "laser sintering" technique with powder particles as the print medium. The powder particles are laid on a mold tray to form a powder layer of a certain thickness, which is laser-cast into a specified shape. The existing laser emitting device is disposed at a fixed position, and the powder of different positions is sintered or melted by rotating the galvanometer in the laser emitting device within a certain angle. Such a structure makes the printing range of the 3D printer small, resulting in a relatively small size of the molded member. Greatly limit the development and application of this process technology.

Summary of the invention

An object of the present invention is to provide a laser driving mechanism capable of performing a printing operation over a wide range by a laser emitting device mounted thereon.

Another object of the present invention is to provide a 3D printer that allows a 3D printer to have a larger print range by a combination of one or more of the laser drive mechanisms of the present invention.

Embodiments of the invention are implemented as follows:

A laser driving mechanism, the laser driving mechanism includes:

a track assembly, the track assembly comprising a curved guide rail;

a mother vehicle that is movably connected to a guide rail that is configured to move in a direction in which the guide rail extends;

The passenger car is movably connected to the mother car, and the passenger car is configured to be movable in the radial direction of the guide rail with respect to the mother car.

In an embodiment of the present invention, the mother carriage of the laser driving mechanism is provided with a driving mechanism, and the driving mechanism includes a guiding wheel and a driving portion for driving the rotation of the guiding wheel. The guiding wheel is drivingly connected with the guide rail, and the driving portion can be driven. The guide wheel rolls on the guide rail to move the mother carriage in the direction in which the guide rail extends.

In an embodiment of the invention, the guide rail of the laser driving mechanism comprises an arc-shaped inner rail and an arc-shaped outer rail. The outer rails are spaced apart from the outer side of the inner rail, and the inner rail and the outer rail are in the same plane; the inner rail The outer rail and the outer rail are respectively movably connected to the mother vehicle, and the mother truck is configured to move in the extending direction of the inner rail and the outer rail.

In an embodiment of the invention, the mother vehicle of the laser driving mechanism is provided with an inner driving mechanism and an outer driving mechanism, and the inner driving mechanism includes an inner guiding wheel and an inner driving for driving the inner guiding wheel to roll on the inner guiding rail. The outer drive mechanism includes an outer guide wheel and an outer drive portion for driving the outer guide wheel to roll on the outer guide rail.

In an embodiment of the invention, the inner guiding rail of the laser driving mechanism is provided with an inner guiding groove, a part of the inner guiding wheel is embedded in the inner guiding groove, an outer guiding groove is arranged on the outer guiding rail, and a part of the outer guiding wheel is embedded outside Guide groove.

In an embodiment of the invention, the track assembly of the laser driving mechanism is provided with a sliding groove that is consistent with the extending direction of the guide rail, and the female vehicle is provided with a sliding portion, and the sliding portion is engaged with the sliding groove.

In an embodiment of the invention, the mother carriage of the laser driving mechanism includes a frame having a rectangular frame structure, the frame includes opposite first and second arms, and the first arm and the second arm are in the diameter of the guide rail. Extending upward, the sub-car is slidably coupled to the first arm and the second arm, and is slidable relative to the mother vehicle in the radial direction of the guide rail.

In an embodiment of the invention, the sub-vehicle driving mechanism is disposed on the sub-car of the laser driving mechanism, and the sub-car driving mechanism includes

Rotating the active portion connected to the sub-car;

a first driving portion for driving rotation of the active portion;

a follower portion spaced apart from the main portion in the radial direction of the guide rail;

The transmission is connected to the transmission portion between the active portion and the driven portion; the transmission portion is coupled to the sub-car to move the sub-car relative to the mother vehicle in the radial direction of the guide rail.

In an embodiment of the invention, the driven portion of the laser driving mechanism includes a fixed shaft and a bearing sleeved on the fixed shaft, and the outer ring of the bearing is drivingly connected to the transmission portion.

The present invention also provides a 3D printer comprising the above-described laser driving mechanism and a table, the laser emitting device of the laser driving mechanism emitting direction toward the table of the table.

The beneficial effects of the embodiments of the present invention are:

The laser drive mechanism of the present invention includes a track assembly, a mother vehicle, a sub-car, and a laser emitting device. The mother vehicle is movably connected to the track assembly, and the rails of the track assembly provide an arcuate motion path for the mother vehicle. The sub-vehicle is connected to the mother car and can move in the radial direction of the curved guide with respect to the mother car, and the laser emitting device is disposed on the sub-car. Such a structure allows the laser emitting device to select a printing operation at different positions on a fan ring surface (or a torus surface) in accordance with the movement of the mother carriage and the sub-car, and thus has a large printing range.

The 3D printer of the present invention includes the above-described laser driving mechanism and a table, and the laser emitting device is capable of directing laser light toward the table top of the table, and can sinter or melt the powder material located on the table. Since the above-described laser driving mechanism is employed, the laser emitting device has a large moving range and thus has a large printing range.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings show only certain embodiments of the present invention, and therefore It should be seen as a limitation on the scope, and those skilled in the art can obtain other related drawings according to these drawings without any creative work.

1 is a schematic view showing the overall structure of a laser driving mechanism according to an embodiment of the present invention;

Figure 2 is a cross-sectional view of a rail assembly in accordance with an embodiment of the present invention;

3 is a schematic structural view of a mother vehicle according to an embodiment of the present invention;

Figure 4 is a cross-sectional view of the inner guide wheel and the outer guide wheel in the embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a sub-car driving mechanism according to an embodiment of the present invention; FIG.

6 is a schematic structural view of an active portion and a driven portion according to an embodiment of the present invention;

7 is a schematic structural view of a sub-car according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a first perspective view of a 3D printer according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a second perspective view of a 3D printer according to an embodiment of the present invention; FIG.

Fig. 10 is another arrangement of the laser driving mechanism in the embodiment of the present invention.

Icons: 100-laser drive mechanism; 110-track assembly; 111-inner rail; 1111-inner guide; 112-outer rail; 1121-outer guide; 113-inner rail; 1131-in-slot; 114-outside Slide rail; 1141-outer chute; 115-mounting section; 120-mother car; 121-frame; 1211-first arm; 1212-second arm; 122-column; 123-inner guide wheel; Wheel; 125-inner drive portion; 126-outer drive portion; 127-sliding portion; 130-sub-car drive mechanism; 131-first drive portion; 132-active portion; 133-driven portion; 134-fixed shaft; - bearing; 136 - toothed structure; 137 - transmission; 140 - sub-car; 142 - slider; 150 - laser emitting device; 200-3D printer; 210 - table.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. The components of the embodiments of the invention, which are generally described and illustrated in the figures herein, may be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the invention in the claims All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once an item is defined in one figure, it is not necessary to further define and explain it in the subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "inside", "outside", etc. is based on the orientation shown in the drawings or The positional relationship, or the orientation or positional relationship that is conventionally placed when the product of the invention is used, is merely for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or component referred to has a specific orientation, specific to Azimuth construction and operation are therefore not to be construed as limiting the invention.

Moreover, the terms "parallel", "vertical" and the like do not mean that the components are required to be absolutely parallel or perpendicular, but may be slightly inclined. In the description of the embodiments of the present invention, it should be noted that the terms "setting", "installing", and "connecting" should be understood in a broad sense unless explicitly stated and defined, for example, may be a fixed connection, or may be It is a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements. The specific meanings of the above terms in the embodiments of the present invention can be understood in a specific case for those skilled in the art.

Example

FIG. 1 is a schematic diagram showing the overall structure of a laser driving mechanism 100 according to an embodiment of the present invention. Referring to FIG. 1 , the embodiment provides a laser driving mechanism 100 including a track assembly 110 , a mother vehicle 120 , a sub-car 140 , and a laser emitting device 150 disposed on the sub-car 140 . The mother vehicle 120 is movably coupled to the track assembly 110 and is movable along a path defined by the track assembly 110; the sub-car 140 is movably coupled to the mother vehicle 120 and is linearly movable relative to the mother vehicle 120. Therefore, the laser emitting device 150 mounted on the sub-car 140 can have a large printing range under the movement of the mother vehicle 120 and the sub-car 140.

2 is a cross-sectional view of the track assembly 110 in accordance with an embodiment of the present invention. 1 and 2, in the present embodiment, the track assembly 110 includes an integrally curved guide rail and a slide rail that allows the mother vehicle 120 to run more stably on the guide rail, and the slide rail is slidably coupled to the mother vehicle 120. The mounting portion 115 is fixedly disposed above the slide rail. The mounting portion 115 can improve the structural stability of the entire rail assembly 110 and is conveniently disposed on the top of the working chamber of the 3D printer 200 (see FIG. 7). It should be understood that in other embodiments of the invention, the rails may be arranged in a toroidal shape to enable the mother vehicle 120 to move in an annular path, the motion plane of the laser emitting device 150 then becoming circular.

In detail, the rail of the rail assembly 110 includes an inner rail 111 and an outer rail 112. The inner rail 111 and the outer rail 112 are both arc-shaped strips. The outer rails 112 are spaced apart from the outer side of the inner rail 111, and the inner rail 111 and the outer rail 112 are spaced apart. In the same plane, the inner rail 111 and the outer rail 112 are movably connected to the mother vehicle 120, respectively, so that the mother bicycle 120 can move in the extending direction of the inner rail 111 and the outer rail 112. In this embodiment, the upper side of the inner rail 111 and the outer rail 112 respectively have an inner guiding groove 1111 and an outer guiding groove 1121 for engaging with the mother vehicle 120, and the inner guiding groove 1111 extends along the length direction of the inner guiding rail 111, and the outer guiding The groove 1121 extends in the longitudinal direction of the outer rail 112.

In the present embodiment, the slide rails of the rail assembly 110 include an inner slide rail 113 and an outer slide rail 114. The inner slide rails 113 are spaced apart from the inner rails 111, and the outer slide rails 114 are spaced above the outer rails 112. The inner slide rail 113 is coplanar with the outer slide rail 114, and the plane of the two is parallel to the plane of the inner rail 111 and the outer rail 112. Further, the lower side of the inner slide rail 113 is provided with an inner sliding slot 1131 extending along the longitudinal direction of the inner sliding rail 113, and the lower side of the outer sliding rail 114 is provided with an outer sliding slot 1141 extending along the longitudinal direction of the outer sliding rail 114. The sliding slot 1131 and the outer sliding slot 1141 are configured to cooperate with the upwardly convex sliding portion 127 (see FIG. 3) on the mother vehicle 120 to make the operation of the mother vehicle 120 more stable.

In this embodiment, the two side walls of the inner sliding slot 1131 and the outer sliding slot 1141 are oppositely convexly provided with protrusions extending along the longitudinal direction of the sliding slot to prevent the mother vehicle 120 from falling off the sliding rail. It should be understood that in other embodiments of the present invention, in the case where the guide rail and the mother vehicle 120 are stably coupled, the slide rail may not be provided; the form of the slide rail on the slide rail may be changed according to actual needs, such as a rectangular slot and a half. Round groove, V-shaped groove, etc.

In this embodiment, the plurality of mounting portions 115 are disposed above the slide rails and are arranged at intervals along the extending direction of the slide rails. Specifically, the main body of the mounting portion 115 is strip-shaped and parallel to the plane of the slide rail, and the two ends thereof are respectively fixed to the upper sides of the inner slide rail 113 and the outer slide rail 114.

FIG. 3 is a schematic structural view of a mother vehicle 120 according to an embodiment of the present invention. Referring to FIG. 1 to FIG. 3, in the embodiment, the mother vehicle 120 includes a frame 121 having a rectangular frame structure, and the plane of the frame 121 is substantially parallel to the plane of the guide rail. The frame 121 includes opposing first and

second arms

1211, 1212 that extend in the radial direction of the rail and that form the two long sides of the frame 121. The sub-car 140 is slidably coupled to the first arm 1211 and the second arm 1212, and is slidable relative to the mother vehicle 120 in the radial direction of the guide rail. In this embodiment, the opposite side of the first arm 1211 and the second arm 1212 is provided with a sliding slot (not shown) extending along the longitudinal direction of the frame 121, and the sliding slot is a dovetail slot.

A driving mechanism is disposed on the mother vehicle 120 of the laser driving mechanism 100. The driving mechanism includes a guiding wheel and a driving portion for driving the rotation of the guiding wheel. The guiding wheel is drivingly connected with the guide rail, and the driving portion can drive the guiding wheel to roll on the guiding rail to realize the mother. The car moves in the direction in which the guide rail extends. In detail, the two ends of the frame 121 in the longitudinal direction are respectively provided with a pair of uprights 122, and the two uprights 122 of one end of the frame 121 (hereinafter referred to as "inner end") are respectively provided with an inner driving mechanism, and the other of the frame 121 The two columns 122 at one end (hereinafter referred to as "outer ends") are respectively provided with external driving mechanisms. In the present embodiment, the columns 122 are perpendicular to the upper surface of the frame 121. Further, the inner drive mechanism includes an inner guide wheel 123 and an inner drive portion 125 for driving the inner guide wheel 123 to roll on the inner rail 111; the outer drive mechanism includes an outer guide wheel 124 and an outer guide wheel 124 for driving the outer guide wheel 124. The outer drive unit 126 is scrolled up. In the present embodiment, the inner driving portion 125 and the outer driving portion 126 are both stepping motors.

In the present embodiment, the inner guide wheel 123 is rotatably coupled to the column 122 via a rotating shaft, and the rotating shaft can drive the inner guide wheel 123 to rotate under the driving of the inner driving portion 125. The rotation axis of the inner guide roller 123 coincides with the radial direction of the inner rail 111, so that the inner guide roller 123 can roll in the tangential direction of the inner rail 111. In the present embodiment, the inner guide wheel 123 is embedded in the inner guide groove 1111 of the inner rail 111 to increase the stability of the mother vehicle 120.

Correspondingly, the two external driving mechanisms are respectively disposed on the column 122 at the outer end of the frame 121. The mounting manner of the external driving mechanism and the matching manner with the outer rail 112 are similar to the internal driving mechanism, and details are not described herein. In addition, since the curvature and length of the inner rail 111 and the outer rail 112 are different, when the mother vehicle 120 performs an arc motion on the rail, the running speeds of the inner end and the outer end on the rail are inconsistent, and the speed of the outer end of the mother vehicle 120 is different. Greater than the speed of the inner end. Therefore, when the rotational speeds of the inner driving portion 125 and the outer driving portion 126 are the same, the diameter of the inner guide wheel 123 should be smaller than the diameter of the outer guide wheel 124; correspondingly, the inner guide groove 1111 on the inner guide rail 111 should be shallower than the outer portion The outer guide groove 1121 of the guide rail 112 is such that the plane of the frame 121 is parallel to the plane of the guide rail.

It should be understood that the manner of maintaining the inner end and the outer end of the mother vehicle 120 at the same angular velocity is not limited to the above manner, and in other embodiments of the present invention, the rotational speeds of the outer driving portion 126 and the inner driving portion 125 may also be adjusted. The moving speed of the outer end is greater than the moving speed of the inner end. When the two driving parts are at a reasonable speed ratio, the inner and outer guiding wheels can adopt the same diameter, and the inner and outer guiding grooves can also have the same depth.

4 is a cross-sectional view of the inner guide wheel 123 and the outer guide wheel 124 in the embodiment of the present invention, and FIG. 3 and FIG. Optionally, in the present embodiment, the hub centers of the inner guide wheel 123 and the outer guide wheel 124 both protrude toward the outer end side of the mother vehicle 120, that is, the middle portion of the inner side of the hub is recessed, and the central portion of the outer side of the hub protrudes outward. . Such a hub structure enables the inner guide roller 123 and the outer guide roller 124 to smoothly and smoothly move on the corresponding guide rails without causing mutual drag.

The top end of the column 122 is provided with a sliding portion 127, and the sliding portions 127 at both ends of the mother vehicle 120 are respectively engaged with the outer sliding groove 1141 of the outer sliding rail 114 and the inner sliding groove 1131 of the inner sliding rail 113, so that the mother bicycle 120 can be more stable and difficult. shake.

FIG. 5 is a schematic structural diagram of a sub-car driving mechanism 130 according to an embodiment of the present invention; FIG. 6 is a schematic structural view of an active portion 132 and a driven portion 133 according to an embodiment of the present invention. Referring to FIG. 1 to FIG. 6 , in the embodiment, the upper surface of the frame 121 is further provided with a sub-car drive mechanism 130 , and the sub-car drive mechanism 130 includes an active portion 132 rotatably coupled to the sub-vehicle 140 for driving the drive. The first driving portion 131 that rotates the portion 132, the driven portion 133 that is spaced apart from the main portion 132 in the radial direction of the guide rail, and the transmission portion 137 that is connected between the active portion 132 and the driven portion 133. The transmission portion 137 is coupled to the sub-car 140 to move the sub-car 140 relative to the mother vehicle 120 in the radial direction of the guide rail. In the present embodiment, the first driving portion 131 is a stepping motor.

In the present embodiment, the main portion 132 and the driven portion 133 are spaced apart from each other in the longitudinal direction of the frame 121 (ie, the radial direction of the guide rail). The transmission portion 137 of the present embodiment is a conveyor belt, and the active portion 132 is a circular pulley. In order to reduce the rotational friction of the driven wheel, the driven wheel includes a fixed shaft 134 and a bearing 135 sleeved on the fixed shaft 134, and the outer peripheral side of the bearing 135 is wound with a transmission portion 137. It should be understood that in other embodiments, the driven wheel may also be comprised of the form of a rotating shaft and a wheel. In order to prevent slippage between the transmission portion 137 and the active portion 132, the inner side of the transmission portion 137 is provided with a toothed structure 136 (not shown) arranged in the longitudinal direction of the transmission portion 137, and the outer peripheral side of the active portion 132 and the driven portion 133 are provided. The outer peripheral side of the bearing 135 is provided with a toothed structure 136 that cooperates with the transmission portion 137, respectively.

FIG. 7 is a schematic structural view of a sub-car 140 according to an embodiment of the present invention. Referring to FIG. 1 to FIG. 7 , in the present embodiment, the sub-car 140 has a substantially rectangular frame shape, and the sub-vehicle 140 is provided with a laser emitting device 150 at the center. Two sides of the sub-car 140 are respectively spaced apart from each other by two dovetail sliders 142 for engaging the inner chutes of the first arm 1211 and the second arm 1212. It should be understood that in other embodiments of the invention, the manner and shape of the slider 142 can be varied as desired.

FIG. 8 and FIG. 9 are schematic diagrams showing the first and second perspective structures of the 3D printer 200 according to an embodiment of the present invention. Referring to FIG. 8 and FIG. 9 , the embodiment further provides a 3D printer 200 including a table 210 and a laser driving mechanism 100 disposed above the table 210 . The plane of the guide rail of the laser driving mechanism 100 is substantially opposite to the working table. The countertops of 210 are parallel. The emission direction of the laser emitting device 150 is directed toward the mesa of the table 210. The 3D printer 200 also includes a laser generator (not shown) that is coupled to the laser emitting device 150 via an optical fiber. In the case where one laser driving mechanism 100 is provided, the printing range of the 3D printer 200 is a fan ring shape.

FIG. 10 is another arrangement of the laser driving mechanism 100 in the embodiment of the present invention. Referring to FIG. 10, in other embodiments of the present invention, a plurality of laser driving mechanisms 100 of a 3D printer may be arranged in a circumferential direction to form a circular track path, enabling the 3D printer to have a circular printing range. The figure shows that the four laser driving mechanisms 100 are patched together (here, the guiding angle of each laser driving mechanism 100 is 90°), and in other embodiments, the angle of the guiding of each laser driving mechanism can be extended. A laser drive mechanism of a different number (for example, 2, 3 or more) is selected to form a circular overall structure.

The working principle of the laser driving mechanism 100 and the 3D printer 200 of the present embodiment is:

The laser driving mechanism 100 includes an arc-shaped track assembly 110, a mother car 120, a sub-car 140, and a laser emitting device 150 disposed on the sub-car 140. The mother car 120 can be along the inner rail under the action of the inner driving mechanism and the outer driving mechanism. 111 and the outer rail 112 do an arc motion. The cooperation of the slider 127 and the slide rail enables the mother truck 120 to operate more stably on the track assembly 110. The sub-car 140 is coupled to the mother vehicle 120 by the cooperation of the slider-slide, and is movable in the radial direction of the guide rail by the sub-vehicle drive mechanism 130. Thus, the laser emitting device 150 on the sub-car 140 has a fan-shaped moving plane, and the laser emitting device 150 can sinter or melt the powder material on the lower table 210 within the moving plane of the fan ring. The 3D printer 200 has a large print range.

In summary, the laser drive mechanism of the present invention includes a track assembly, a mother car, a sub-car, and a laser emitting device. The mother vehicle is movably connected to the track assembly, and the rails of the track assembly provide an arcuate motion path for the mother vehicle. The sub-vehicle is connected to the mother car and can move in the radial direction of the curved guide with respect to the mother car, and the laser emitting device is disposed on the sub-car. Such a structure allows the laser emitting device to be selected for printing at different positions on a fan ring surface (or a torus) with the movement of the mother and the vehicle, and thus has a large printing range.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A laser driving mechanism, characterized in that the laser driving mechanism comprises:

a track assembly, the track assembly comprising an arcuate guide rail;

a mother vehicle movably coupled to the guide rail, the female vehicle being configured to be movable in an extending direction of the guide rail;

The passenger car is movably coupled to the mother vehicle, the passenger car being configured to be movable in a radial direction of the guide rail relative to the mother vehicle.
A laser driving mechanism according to claim 1, wherein said mother carriage is provided with a driving mechanism, said driving mechanism comprising a guide wheel and a driving portion for driving said guide wheel to rotate, said guide wheel and The guide rail is drivingly coupled, and the driving portion is configured to drive the guide wheel to roll on the guide rail to realize movement of the mother vehicle along an extending direction of the guide rail.
A laser driving mechanism according to claim 1, wherein said guide rail comprises an arcuate inner rail and an arcuate outer rail, said outer rail being spaced apart from an outer side of said inner rail, said inner rail and The outer rails are in the same plane; the inner rail and the outer rail are respectively movably connected to the mother vehicle, and the mother vehicle is configured to be movable in an extending direction of the inner rail and the outer rail.
A laser driving mechanism according to claim 3, wherein said mother vehicle is provided with an inner driving mechanism and an outer driving mechanism, said inner driving mechanism comprising an inner guide wheel and a driving guide for said inner guide wheel An inner drive portion that rolls on the inner rail; the outer drive mechanism includes an outer guide wheel and an outer drive portion for driving the outer guide wheel to roll on the outer guide rail.
The laser driving mechanism according to claim 4, wherein the inner rail is provided with an inner guiding groove, a portion of the inner guiding wheel is embedded in the inner guiding groove, and an outer guiding groove is arranged on the outer guiding rail The portion of the outer guide wheel is embedded in the outer guide groove.
The laser driving mechanism according to claim 1, wherein the rail assembly is provided with a sliding groove that coincides with an extending direction of the guide rail, and the female vehicle is provided with a sliding portion, the sliding portion and the sliding portion The chute fits.
A laser driving mechanism according to claim 1, wherein said mother carriage comprises a frame having a rectangular frame structure, said frame including opposing first and second arms, said first arm and said The second arm extends in a radial direction of the guide rail, and the sub-vehicle is slidably coupled to the first arm and the second arm and is slidable in a radial direction of the guide rail with respect to the mother vehicle.
The laser driving mechanism according to claim 1, wherein said sub-car is provided with a sub-car driving mechanism, and said sub-car driving mechanism comprises

Rotating the active portion connected to the sub-car;

a first driving portion for driving the rotation of the active portion;

a follower portion spaced apart from the guide portion in the radial direction of the guide rail;

A transmission is coupled to the transmission portion between the active portion and the driven portion; the transmission portion is coupled to the sub-car to drive the sub-vehicle to move in a radial direction of the guide rail relative to the bicycle.
The laser driving mechanism according to claim 8, wherein the driven portion includes a fixed shaft and a bearing sleeved on the fixed shaft, and an outer ring of the bearing is drivingly coupled to the transmission portion.
A 3D printer comprising the laser driving mechanism according to any one of claims 1 to 9 and a table, wherein a laser emitting device of the laser driving mechanism emits in a direction toward a table of the table.