CN117774311A

CN117774311A - 3D printing equipment

Info

Publication number: CN117774311A
Application number: CN202311021368.1A
Authority: CN
Inventors: 郭培清; 朱姚胜
Original assignee: Zhongke Fengyang Fujian Technology Co ltd
Current assignee: Zhongke Fengyang Fujian Technology Co ltd
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2024-03-29

Abstract

The invention relates to the technical field of 3D printing, in particular to 3D printing equipment, which comprises: a base; a frame disposed on the base; a workbench arranged on the frame; the three-dimensional movement mechanism is arranged on the frame; a driving mechanism arranged on the frame; the transmission mechanism is arranged on the frame and is connected with the three-dimensional movement mechanism and the driving mechanism. The invention is provided with the transmission mechanism, and the impact can be buffered through the conveyor belt, so that the impact is relieved, and the normal operation of mechanical equipment is protected.

Description

3D printing equipment

Technical Field

The invention relates to the technical field of 3D printing, in particular to 3D printing equipment.

Background

The 3D printer is also called as a three-dimensional printer (3 DP), is a machine of a cumulative manufacturing technology, namely a rapid prototyping technology, is based on a digital model file, and is used for manufacturing a three-dimensional object by printing a layer of adhesive material by using special wax materials, powdered metals or plastic and other adhesive materials.

The i3 structure frame of the 3D printer is relatively simple, the simple portal frame is relatively material-saving, but because the weight of the platform is relatively large, the inertia is naturally large during printing, the loads of the stepping motor and the synchronous belt are increased, and the abrasion of the synchronous belt can be accelerated.

Disclosure of Invention

In order to overcome the technical defects in the prior art, the invention provides the 3D printing equipment, which is provided with the transmission mechanism, and can buffer impact through the conveyor belt and the conveying shaft, so that the problems in the background art can be effectively solved.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the embodiment of the invention discloses 3D printing equipment, which comprises the following components:

a base;

a frame disposed on the base;

a workbench arranged on the frame;

the three-dimensional movement mechanism is arranged on the frame;

a driving mechanism arranged on the frame;

the transmission mechanism is arranged on the frame and is connected with the three-dimensional movement mechanism and the driving mechanism.

In any of the above aspects, preferably, the three-dimensional movement mechanism includes an X-axis movement mechanism, a Y-axis movement mechanism, and a Z-axis movement mechanism;

the Y-axis movement mechanism is connected with the frame, the Z-axis movement mechanism is connected with the frame, and the X-axis movement mechanism is connected with the Z-axis movement mechanism;

the driving mechanism drives the transmission mechanism, the transmission mechanism drives the Y-axis movement mechanism to horizontally move in the Y-axis direction, the transmission mechanism drives the Z-axis movement mechanism to vertically move in the Z-axis direction, and the transmission mechanism drives the X-axis movement mechanism to horizontally move in the X-axis direction.

In any of the above schemes, preferably, the Y-axis motion mechanism includes two symmetrically arranged Y-axis sliding guide rails, and the Y-axis sliding guide rails are horizontally arranged on the frame;

the Z-axis movement mechanism comprises two Z-axis sliding guide rails which are symmetrically arranged, and the Z-axis sliding guide rails are vertically arranged on two sides of the frame;

the X-axis moving mechanism comprises an X-axis sliding guide rail, two ends of the X-axis sliding guide rail are horizontally arranged on the Z-axis sliding guide rail, and a printing head is arranged on the X-axis sliding guide rail.

In any of the above schemes, preferably, the Y-axis sliding guide rail is slidingly connected with the workbench and connected with the bottom of the frame; vibration damping springs are arranged at four corners of the workbench.

In any of the above aspects, preferably, the transmission mechanism includes a first conveyor belt, a first driving shaft, and a first driven shaft;

the first driven shaft is connected to the inner surface of the bottom of the frame, and the first driving shaft is connected to the output end of the first motor;

the first conveyor belt is connected to the bottom of the workbench and connected with the first driving shaft and the first driven shaft.

In any of the above schemes, preferably, the transmission mechanism further comprises a second driving shaft, a third driving shaft, a second driven shaft, a third driven shaft, a fourth driven shaft and a fifth driven shaft which are arranged on the frame;

the sixth driven shaft and the seventh driven shaft are arranged on the X-axis sliding guide rail;

the second driving shaft is connected to the output end of the second motor, and the third driving shaft is connected to the output end of the third motor.

In any of the above aspects, preferably, the transmission mechanism further includes a second conveyor belt and a third conveyor belt;

one end of the second conveyor belt is connected to the outer surface of the printing head, and sequentially passes through the sixth driven shaft, the third driven shaft, the second driving shaft and the seventh driven shaft to be connected to the other side surface of the outer surface of the printing head;

one end of the third conveyor belt is connected to the outer surface of the printing head, and sequentially penetrates through the seventh driven shaft, the fifth driven shaft, the fourth driven shaft, the third driving shaft and the sixth driven shaft to be connected to the other side surface of the outer surface of the printing head.

In any of the above aspects, preferably, a control panel is provided at an upper portion of the frame; and a circuit component is arranged on one side of the frame, which is close to the third motor.

In any of the above schemes, preferably, a main machine is arranged on one side of the frame, which is close to the second motor.

In any of the above aspects, preferably, the outer surface of the frame is provided with a power interface and a power switch.

Compared with the prior art, the invention has the beneficial effects.

The base provides stable support for the equipment, the frame provides structural support for the whole 3D printing equipment, stability and accuracy of the equipment are ensured, and the workbench is used for placing a platform of an object to be printed; the three-dimensional motion mechanism is responsible for accurate motion control in the directions of an X axis, a Y axis and a Z axis, so that the printing head can move in an accurate path, and the accurate positioning of a three-dimensional printing object is realized; the driving mechanism provides power to provide power for the printing process; the transmission mechanism connects the three-dimensional movement mechanism and the driving mechanism, so that the driving device and the three-dimensional movement mechanism can work cooperatively; the transmission mechanism has the characteristics of stable transmission and buffering and vibration absorption, and can play a good role in buffering and vibration reduction while stably transmitting moment, so that the impact is relieved, and the normal operation of mechanical equipment is protected; the transmission mechanism can also control the moving speed and the transporting direction of the object by adjusting the rotating speed, the direction and the inclination angle of the conveyor belt, so that the object is precisely controlled and positioned, precise three-dimensional printing is realized, and more possibilities are provided for creation and manufacture; the device has the characteristics of low cost, no need of lubrication and convenient maintenance, and can prolong the service life of the device.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

Fig. 1 is a perspective view of a 3D printing apparatus of the present invention;

FIG. 2 is another perspective view of the 3D printing apparatus of the present invention;

fig. 3 is a perspective view of the driving mechanism of the 3D printing apparatus of the present invention.

The reference numerals in the figures illustrate: 1. a base; 2. a frame; 3. a work table; 4. an X-axis sliding guide rail; 5. a Y-axis sliding guide rail; 6. a Z-axis sliding guide rail; 31. a damping spring; 41. a sixth driven shaft; 42. a seventh driven shaft; 43. a second conveyor belt; 44. a third conveyor belt; 51. a first conveyor belt; 52. a first drive shaft; 53. a first driven shaft; 61. a second drive shaft; 62. a second driven shaft; 63. a third driven shaft; 64. a third drive shaft; 65. a fourth driven shaft; 66. a fifth driven shaft; 71. a print head; 72. a control panel; 73. a circuit component; 74. a host; 75. a power interface; 76. a power switch; 81. a first motor; 82. a second motor; 83. and a third motor.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In order to better understand the above technical scheme, the following detailed description of the technical scheme of the present invention will be given with reference to the accompanying drawings of the specification and the specific embodiments.

As shown in fig. 1 to 3, a 3D printing apparatus includes

: a base 1;

a frame 2 provided on the base 1;

a table 3 provided on the frame 2;

a three-dimensional movement mechanism provided on the frame 2;

a driving mechanism provided on the frame 2;

the transmission mechanism is arranged on the frame 2 and is connected with the three-dimensional movement mechanism and the driving mechanism.

In the embodiment of the invention, the base provides stable support for the equipment, the frame provides structural support for the whole 3D printing equipment, the stability and the accuracy of the equipment are ensured, and the workbench is used for placing a platform of an object to be printed; the three-dimensional motion mechanism is responsible for accurate motion control in the directions of an X axis, a Y axis and a Z axis, so that the printing head can move in an accurate path, and the accurate positioning of a three-dimensional printing object is realized; the driving mechanism provides power to provide power for the printing process; the transmission mechanism connects the three-dimensional movement mechanism and the driving mechanism, so that the driving device and the three-dimensional movement mechanism can work cooperatively; the transmission mechanism has the characteristics of stable transmission and buffering and vibration absorption, and can play a good role in buffering and vibration reduction while stably transmitting moment, so that the impact is relieved, and the normal operation of mechanical equipment is protected.

As shown in fig. 1 to 3, the three-dimensional movement mechanism includes an X-axis movement mechanism, a Y-axis movement mechanism, and a Z-axis movement mechanism;

the Y-axis movement mechanism is connected with the frame 2, the Z-axis movement mechanism is connected with the frame 2, and the X-axis movement mechanism is connected with the Z-axis movement mechanism;

In the embodiment of the invention, the three-dimensional movement mechanism is used for realizing movement of an object in three directions, the X-axis movement mechanism is used for controlling movement of the object in the X-axis direction, the Y-axis movement mechanism is used for controlling movement of the object in the Y-axis direction, and the Z-axis movement mechanism is used for controlling movement of the object in the Z-axis direction; the connection of the Z-axis movement mechanism and the frame 2 can provide stable support for the Z-axis movement mechanism, so that the stability of the Z-axis movement mechanism in the movement process is ensured, the influence of accidental displacement or vibration on equipment is avoided, the movement of an object in the horizontal direction can be realized through the connection of the Y-axis movement mechanism and the frame 2, and the Y-axis movement mechanism is ensured to be more stable and reliable in the working process; the three-dimensional motion mechanism has the advantages that the printing precision and accuracy are improved, flexible operation and positioning capability are provided through motion control in three axial directions, and accurate control of the position of the printing head can be realized, so that the printing result is more accurate and fine, and different requirements of printing tasks are met.

As shown in fig. 1 to 3, the Y-axis movement mechanism comprises two symmetrically arranged Y-axis sliding guide rails 5, and the Y-axis sliding guide rails 5 are horizontally arranged on the frame 2; the Z-axis movement mechanism comprises two Z-axis sliding guide rails 6 which are symmetrically arranged, and the Z-axis sliding guide rails 6 are vertically arranged on two sides of the frame 2; the X-axis movement mechanism comprises an X-axis sliding guide rail 4, two ends of the X-axis sliding guide rail 4 are horizontally arranged on the Z-axis sliding guide rail 6, and a printing head 71 is arranged on the X-axis sliding guide rail 4.

In the embodiment of the invention, the three-dimensional movement mechanism is a key component part in the 3D printing equipment, so that the equipment can realize accurate movement control on X axis, Y axis and Z axis; the Y-axis movement mechanism can realize accurate positioning and movement of the workbench in the Y-axis direction through the horizontal arrangement and connection of the Y-axis sliding guide rail; the Z-axis movement mechanism can realize accurate positioning and movement of the printing head in the Z-axis direction through vertical arrangement and connection of the Z-axis sliding guide rail, and ensures the vertical stability and accuracy of the printing head in the printing process; the X-axis movement mechanism connects the printing head with the Z-axis movement mechanism through the horizontal arrangement and connection of the X-axis sliding guide rail, so that the printing head can horizontally move in the X-axis direction; the three-dimensional movement mechanism is combined, so that flexible movement of the printing head in three directions can be realized, and accurate printing operation is realized; the printing head can horizontally move in a plane and can vertically move up and down, and simultaneously can horizontally move in the X-axis direction, so that the printing head can flexibly move in a plurality of directions, and a printing task with a complex shape is realized; the three-dimensional motion mechanism has the advantages that the printing precision and accuracy are improved, the accurate control of the position of the printing head can be realized through the motion control in three axial directions, so that the printing result is more accurate and precise, more complex and diversified products can be printed, and the printing tasks of different requirements are met.

As shown in fig. 1 to 3, the Y-axis sliding guide rail 4 is slidably connected to the table 3 and connected to the bottom of the frame 2; damping springs 31 are arranged at four corners of the workbench 3.

In the embodiment of the invention, the Y-axis sliding guide rail 4 is in sliding connection with the workbench 3, the first conveyor belt is connected to the bottom of the workbench 3, and the workbench 3 can be moved on the Y-axis sliding guide rail by the movement of the conveyor belt, so that the 3D printing equipment can realize fine control and adjustment in the Y-axis direction; the Y-axis sliding guide rail 4 is connected with the bottom of the frame 2 to fix the position of the guide rail, so that the stability in the printing process is ensured, and the influence of accidental displacement or vibration on the printing quality is avoided; the vibration damping spring 31 can reduce the influence of external vibration on the workbench 3, the vibration damping spring 31 can reduce the vibration and the shaking degree of the workbench 3, the stability and the stability of the workbench 3 are improved, and the workbench 3 is ensured to be more stable and reliable in the working process.

As shown in fig. 1 to 3, the transmission mechanism includes a first conveyor belt 51, a first driving shaft 52, and a first driven shaft 53;

the first driven shaft 53 is connected to the inner surface of the bottom of the frame 2, and the first driving shaft 52 is connected to the output end of the first motor 81;

the first conveyor belt 51 is connected to the bottom of the table 3 and connected to the first driving shaft 52 and the first driven shaft 53.

In the embodiment of the present invention, the transmission mechanism functions to transmit the power of the first motor 81 to the table 3; the first motor transmits power to the first conveyor belt and the first driven shaft through the first driving shaft, so that the workbench can move accurately in the Y-axis direction; the first driving shaft is used for driving the conveyor belt to run, transmitting power to the conveyor belt, driving the conveyor belt to move, and adjusting the speed and direction of the conveyor belt according to the requirement; the first driven shaft 53 is used for connecting and supporting the conveyor belt, the first driven shaft 53 is connected to the inner surface of the bottom of the frame 2, so that a support is provided for the movement of the first conveyor belt, the power and the movement axial direction can be effectively transmitted, and the normal operation of the conveyor belt is ensured; the first conveyor belt 51 is connected to the bottom of the workbench 3, and the workbench 3 can be moved on the Y-axis sliding 4 guide rail through movement of the conveyor belt, so that the 3D printing device can realize fine control and adjustment in the Y-axis direction, and power transmission is more stable and efficient.

As shown in fig. 1 to 3, the transmission mechanism further includes a second driving shaft 61, a third driving shaft 64, a second driven shaft 62, a third driven shaft 63, a fourth driven shaft 65, and a fifth driven shaft 66 provided on the frame 2;

a sixth driven shaft 41 and a seventh driven shaft 42 are provided on the X-axis slide rail 4;

the second driving shaft 61 is connected to an output end of the second motor 82, and the third driving shaft 64 is connected to an output end of the third motor 83.

The transmission mechanism further comprises a second conveyor belt 43 and a third conveyor belt 44;

one end of the second conveyor belt 43 is connected to the outer surface of the print head 71, and passes through the sixth driven shaft 41, the third driven shaft 63, the second driven shaft 62, the second driving shaft 61 and the seventh driven shaft 42 in sequence to be connected to the other side surface of the outer surface of the print head 71;

one end of the third conveyor belt 44 is connected to the outer surface of the print head 71, and passes through the seventh driven shaft 42, the fifth driven shaft 66, the fourth driven shaft 65, the third driving shaft 64, and the sixth driven shaft 41 in sequence to be connected to the other side surface of the outer surface of the print head 71.

In the embodiment of the invention, the transmission mechanism can realize the movement of an object in the horizontal and vertical directions; the second motor and the third motor are used as driving sources of the driving shafts, power is transmitted to the conveyor belt and the driven shaft through the respective driving shafts, and when the conveyor belt rotates, the printing head can be driven to the corresponding position; the multidimensional motion control of the object can be realized by controlling the motor, and the flexibility and the accuracy of the printing head can be improved, so that the accurate position positioning and moving effects are realized; when the second motor 82 moves, power is output to the second driving shaft 61, so that the second conveyor belt 43 is driven to move, one end of the second conveyor belt 43 sequentially passes through the second driven shaft 62 and the third driven shaft 63 and drives the second conveyor belt 43 to move, the second conveyor belt 43 passes through the shaft wheel at the inner side of the sixth driven shaft 41 to be connected with the printing head, and the other end of the second conveyor belt 43 passes through the shaft wheel at the inner side of the seventh driven shaft 42 to be connected with the printing head; when the second motor 82 moves clockwise, the second conveyor belt 43 drives the print head to move leftwards in the X-axis direction, and when the second motor 82 moves anticlockwise, the second conveyor belt 43 drives the print head to move rightwards in the X-axis direction; when the third motor 83 moves, power is output to the third driving shaft 64, so that the third conveyor belt 44 is driven to move, one end of the third conveyor belt 44 sequentially passes through the fourth driven shaft 65 and the fifth driven shaft 66 and drives the third driven shaft 66 to move, the third conveyor belt 44 passes through the shaft wheel outside the seventh driven shaft 4242 to be connected with the printing head, and the other end of the third conveyor belt 44 passes through the shaft wheel outside the sixth driven shaft 41 to be connected with the printing head; when the third motor 83 moves clockwise, the third conveyor belt 44 drives the printing head to move leftwards in the X-axis direction, and when the third motor 83 moves anticlockwise, the third conveyor belt 44 drives the printing head to move rightwards in the X-axis direction; when the second motor and the third motor simultaneously rotate clockwise, the printing head moves leftwards on the X axis; when the second motor and the third motor simultaneously rotate anticlockwise, the printing head moves rightwards on the X axis; when the second motor rotates clockwise and the third motor rotates anticlockwise, the printing head moves downwards in the Z-axis direction; when the second motor rotates anticlockwise and the third motor rotates clockwise, the printing head moves upwards in the Z-axis direction; the motion of each shaft motion mechanism can be controlled by controlling the motion of the motor, so that the accurate positioning of the printing head is realized, and the accurate three-dimensional printing is realized; the conveyor belt has elasticity, can reduce impact and vibration load, and has stable operation and no noise; when overloaded, the conveyor belt can slip on the conveying shaft, so that other parts can be prevented from being damaged; the conveyor belt has the characteristics of low cost, no need of lubrication and convenient maintenance, and can prolong the service life of equipment.

As shown in fig. 1 to 3, the upper part of the frame 2 is provided with a control panel 72; a circuit part 73 is arranged on one side of the frame 2 close to the third motor 83; a main machine 74 is arranged on one side of the frame 2 close to the second motor 82; the outer surface of the frame 2 is provided with a power interface 75 and a power switch 76.

In an embodiment of the invention, the control panel 72 provides control and adjustment of the 3D printing device, including buttons, switches, a display screen for the user to set and control the device; the circuit part 73 includes electronic components, a circuit board, and connection wires for controlling and adjusting the operation of the 3D printing apparatus; the host 74 is responsible for processing control logic of the device, receiving input instructions and executing corresponding operations, communicating and coordinating with the control panel, the motor and other components, and ensuring normal operation of the device; the power interface 75 and the power switch 76 provide power supply and switch control.

When the 3D printing equipment works, a power supply is required to be switched on, a power supply switch is turned on, and a user can easily configure and adjust the equipment through the cooperation of the control panel, the circuit component and the host computer, so that accurate motion control is realized; the first motor is controlled to realize the movement of the workbench on the Y axis; when the second motor and the third motor simultaneously rotate clockwise, the printing head moves leftwards on the X axis; when the second motor and the third motor simultaneously rotate anticlockwise, the printing head moves rightwards on the X axis; when the second motor rotates clockwise and the third motor rotates anticlockwise, the printing head moves downwards in the Z-axis direction; when the second motor rotates anticlockwise and the third motor rotates clockwise, the printing head moves upwards in the Z-axis direction; the motion of each shaft motion mechanism can be controlled by controlling the motion of the motor, so that the accurate positioning of the printing head is realized, and the accurate three-dimensional printing is realized.

The above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A 3D printing apparatus, characterized in that: comprising the following steps:

a base (1);

a frame (2) provided on the base (1);

a workbench (3) arranged on the frame (2);

the three-dimensional movement mechanism is arranged on the frame (2);

a driving mechanism arranged on the frame (2);

the transmission mechanism is arranged on the frame (2) and is connected with the three-dimensional movement mechanism and the driving mechanism.

2. The 3D printing apparatus according to claim 1, wherein: the three-dimensional motion mechanism comprises an X-axis motion mechanism, a Y-axis motion mechanism and a Z-axis motion mechanism;

the Y-axis movement mechanism is connected with the frame (2), the Z-axis movement mechanism is connected with the frame (2), and the X-axis movement mechanism is connected with the Z-axis movement mechanism;

3. The 3D printing apparatus according to claim 2, wherein: the Y-axis movement mechanism comprises two Y-axis sliding guide rails (5) which are symmetrically arranged, and the Y-axis sliding guide rails (5) are horizontally arranged on the frame (2);

the Z-axis movement mechanism comprises two Z-axis sliding guide rails (6) which are symmetrically arranged, and the Z-axis sliding guide rails (6) are vertically arranged at two sides of the frame (2);

the X-axis moving mechanism comprises an X-axis sliding guide rail (4), two ends of the X-axis sliding guide rail (4) are horizontally arranged on the Z-axis sliding guide rail (6), and a printing head (71) is arranged on the X-axis sliding guide rail (4).

4. A 3D printing device according to claim 3, characterized in that: the Y-axis sliding guide rail (4) is connected with the workbench (3) in a sliding manner and is connected with the bottom of the frame (2); vibration damping springs (31) are arranged at four corners of the workbench (3).

5. The 3D printing apparatus according to claim 4, wherein: the transmission mechanism comprises a first conveyor belt (51), a first driving shaft (52) and a first driven shaft (53);

the first driven shaft (53) is connected to the inner surface of the bottom of the frame (2), and the first driving shaft (52) is connected to the output end of the first motor (81);

the first conveyor belt (51) is connected to the bottom of the workbench (3) and is connected with the first driving shaft (52) and the first driven shaft (53).

6. The 3D printing apparatus according to claim 5, wherein: the transmission mechanism further comprises a second driving shaft (61), a third driving shaft (64), a second driven shaft (62), a third driven shaft (63), a fourth driven shaft (65) and a fifth driven shaft (66) which are arranged on the frame (2);

a sixth driven shaft (41) and a seventh driven shaft (42) are arranged on the X-axis sliding guide rail (4);

the second driving shaft (61) is connected to the output end of the second motor (82), and the third driving shaft (64) is connected to the output end of the third motor (83).

7. The 3D printing apparatus of claim 6, wherein: the transmission mechanism also comprises a second conveyor belt (43) and a third conveyor belt (44);

one end of the second conveyor belt (43) is connected to the outer surface of the printing head (71), and sequentially passes through the sixth driven shaft (41), the third driven shaft (63), the second driven shaft (62), the second driving shaft (61) and the seventh driven shaft (42) to be connected to the other side surface of the outer surface of the printing head (71);

one end of the third conveyor belt (44) is connected to the outer surface of the printing head (71), and sequentially penetrates through the seventh driven shaft (42), the fifth driven shaft (66), the fourth driven shaft (65), the third driving shaft (64) and the sixth driven shaft (41) to be connected to the other side surface of the outer surface of the printing head (71).

8. The 3D printing apparatus of claim 7, wherein: a control panel (72) is arranged at the upper part of the frame (2); a circuit component (73) is arranged on one side of the frame (2) close to the third motor (83).

9. The 3D printing apparatus of claim 8, wherein: a host machine (74) is arranged on one side, close to the second motor (82), of the frame (2).

10. The 3D printing apparatus according to claim 9, wherein: the outer surface of the frame (2) is provided with a power interface (75) and a power switch (76).