Foldable 3D printing equipment and control method thereof

Abstract

The invention discloses foldable 3D printing equipment and a control method thereof.The foldable 3D printing equipment comprises a frame, a printing platform is installed at the bottom in the frame, an X-axis transverse moving mechanism is installed on the frame and located above the printing platform, the X-axis transverse moving mechanism can reciprocate in the X-axis direction, and a printing head is installed on the X-axis transverse moving mechanism and can reciprocate in the Y-axis direction; the frame comprises a bottom frame, a top frame and folding supporting rods, and the folding supporting rods are hinged to the four corners between the bottom frame and the top frame respectively. The 3D printing equipment can be folded, the X-axis transverse moving mechanism can slide smoothly during printing, the situation that the X-axis transverse moving mechanism is jammed due to the unevenness problem is avoided, the height of the 3D printing equipment can be increased and decreased without a driving motor or only four driving motors can be adopted for driving, the number of the driving motors is reduced by half, and the cost is reduced. And the equipment production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of 3D printer technology, and more particularly to a foldable 3D printing device and its control method. Background Technology

[0002] 3D printing technology, as a rapid prototyping technology, has been widely applied in various fields such as industrial manufacturing, medical care, education, and home use. With the continuous development of technology, users are placing increasingly higher demands on the portability of 3D printing equipment. Existing 3D printing equipment is typically large in size and has a fixed structure, making it inconvenient to transport and unsuitable for mobile use. These limitations mean that traditional equipment cannot meet the requirements of portability and flexibility for temporary or on-site printing needs. Therefore, we propose a foldable 3D printing device and its control method according to this invention.

[0003] A search revealed Chinese patent document CN217968416U, published on December 6, 2022, which discloses a portable 3D printer. The printer includes a platform and two motion mechanisms. The platform has multiple grooves, and the two motion mechanisms are symmetrically arranged on the platform. Each motion mechanism includes two first linkage mechanisms and one transverse slide rail. One end of each of the two first linkage mechanisms is rotatably mounted on a through groove, and the other end is rotatably connected to the transverse slide rail. A longitudinal slide rail is installed between the two transverse slide rails and is slidably connected to the two transverse slide rails. A nozzle is slidably mounted on the underside of the longitudinal slide rail. When the first linkage mechanism drives the transverse slide rail to move vertically to its lowest point, the entire motion mechanism is concealed within the grooves of the platform. Its advantages are: the 3D printer's three-dimensional structure can be folded, effectively reducing its size when not in use, making it convenient for users to carry around; its disadvantages are: firstly, the two crossbeam slide rails are independent, requiring very high precision control of the drive motors. If the two crossbeam slide rails on both sides are not at the same level, it will cause the ends of the longitudinal slide rail to twist and be subjected to force, making it impossible for the longitudinal slide rail to slide smoothly on the crossbeam slide rail, thus affecting printing; secondly, this solution uses 8 drive motors for the lifting of the crossbeam slide rails, resulting in higher equipment production costs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the problems existing in the background art and provide a foldable 3D printing device and its control method. This not only enables the 3D printing device to be foldable, but also allows the X-axis transverse mechanism to slide smoothly during printing without being blocked due to unevenness. Furthermore, the height adjustment of the 3D printing device can be driven without a drive motor, or only with four drive motors, reducing the number of drive motors by half and lowering the equipment production cost.

[0005] To achieve the above-mentioned technical features, the present invention aims to provide a foldable 3D printing device, comprising a frame, a printing platform mounted at the bottom of the frame, an X-axis transverse mechanism mounted on the frame above the printing platform, the X-axis transverse mechanism being capable of reciprocating along the X-axis direction, a print head mounted on the X-axis transverse mechanism and capable of reciprocating along the Y-axis direction, the frame comprising a bottom frame, a top frame, and folding support rods, folding support rods being hinged at the four corners between the bottom frame and the top frame, the folding support rods comprising a first rod, a second rod, and a third rod, a first adjustment seat fixedly mounted at the four corners on the upper side of the bottom frame, the first rod being hinged to the first adjustment seat via a first pivot, the upper end of the first rod being mounted to the second rod via a folding joint mechanism, the upper end of the second rod being hinged to the second adjustment seat via a second pivot, the upper side of the second adjustment seat being fixedly connected to the third rod, and the third rod being mounted to the top frame.

[0006] The folding joint mechanism includes a first gear, a second gear, and a connecting rod. The first gear and the second gear are respectively fixedly installed at the ends of the first rod and the second rod that are close to each other. The first gear and the second gear mesh. Connecting rods are respectively provided on both sides of the first gear and the second gear, and the two ends of the connecting rods are respectively hinged to the central pivot of the first gear and the second gear.

[0007] At least one folding support rod has racks fixedly installed on its first, second, and third members respectively. When the first and second members are unfolded and coaxial, the racks on the first, second, and third members abut against each other. A slotted block is slidably installed on the rack, and the slotted block slidably hooks the side of the rack away from the tooth surface. A first motor is installed on the slotted block, and a drive gear is installed on the output shaft of the first motor. The drive gear meshes with the rack. Linear guide rails are fixedly installed on the first, second, and third members of the remaining folding support rods. When the first and second members are unfolded and coaxial, the linear guide rails on the first, second, and third members abut and align with each other, and sliders are installed on the linear guide rails. The frame is also equipped with a Z-axis lifting mechanism, and the four corners of the Z-axis lifting mechanism are respectively fixed to the slotted block and the slider; the X-axis transverse mechanism is installed on the Z-axis lifting mechanism.

[0008] A first positioning screw is screwed onto the first adjusting seat. When the first positioning screw abuts against the first rod, it positions the first rod. A second positioning screw is screwed onto the second adjusting seat. When the second positioning screw abuts against the second rod, it positions the second rod.

[0009] The X-axis transverse mechanism is mounted on the top frame and can reciprocate along the X-axis direction on the top frame. The folding joint mechanism includes a first gear, a second gear, and a connecting rod. A second motor is mounted on the end of the first rod that is close to the second rod. The first gear is fixedly mounted on the output shaft of the second motor. The second gear is fixedly mounted on the end of the second rod that is close to the first rod. The second gear meshes with the first gear. The two sides of the first gear are hinged to one end of the connecting rod on the output shaft of the second motor, respectively. The other end of the connecting rod is hinged to the central pivot of the second gear. The top frame is driven to rise and fall by the second motor.

[0010] The folding support rods are arranged in pairs. The top of the third rod of one group of folding support rods is fixedly connected to the top frame. The top of the third rod of the other group of folding support rods is respectively fixed with a first hinge seat. The lower side of the top frame is fixed with a second hinge seat at the position corresponding to the two first hinge seats. The first hinge seat and the second hinge seat are hinged by a pin.

[0011] A base is installed inside the bottom frame, and a third motor is installed inside the base. A printing platform is installed on the output shaft of the third motor, and the third motor is used to drive the printing platform to rotate.

[0012] A controller is installed on the bottom frame, and the controller is electrically connected to and controls the first motor, the second motor, the third motor, the Y-axis transverse movement mechanism, and the print head.

[0013] A storage battery is installed inside the base, and the storage battery is electrically connected to the controller for power supply.

[0014] A control method for controlling the operation of a foldable 3D printing device, the control method comprising the following steps: When the printing device is in the folded state, turn on the power, the second motor starts, and the printing device unfolds; During printing, the height of the print head is adjusted by controlling the operation of the second motor; the movement of the print head along the X-axis is adjusted by controlling the operation of the X-axis transverse mechanism; and the movement of the print head along the Y-axis is adjusted by controlling the operation of the print head on the X-axis transverse mechanism. When the model being printed is a cylinder, printing begins after the print head moves to the designated position via the X-axis lateral movement mechanism. The third motor is controlled to drive the printing platform to rotate. After one rotation, the print head fills the interior. Afterward, the print head is adjusted in the Z-axis height direction via the second motor. When there is interference in the printed model, the movement of the second motors on the two sets of folding support rods is controlled to adjust the tilt angle of the top frame so that the print head tilts to avoid interference. The third motor is controlled to drive the printing platform to rotate and adjust the position to avoid interference.

[0015] The present invention, which adopts the above technical solution, has the following prominent features compared with the prior art: 1. The printing platform of this invention provides a basic support for 3D printing materials. The X-axis transverse mechanism can reciprocate along the X-axis direction, providing the X-axis running direction for the print head. The print head is mounted on the X-axis transverse mechanism and can reciprocate along the Y-axis direction, providing the Y-axis running direction for the print head. By different settings of the folding support rod, the Z-axis lifting mechanism can move up and down to provide the Z-axis movement for the print head, or the height adjustment of the frame can provide the Z-axis movement for the print head. This invention not only enables the 3D printing equipment to fold, but also allows the X-axis transverse mechanism to slide smoothly during printing, preventing jamming due to unevenness. Furthermore, the height adjustment of the 3D printing equipment can be driven without a drive motor, or only with four drive motors, reducing the number of drive motors by half and lowering the equipment production cost.

[0016] 2. The X-axis transverse mechanism of the present invention is installed on the top frame. The X-axis transverse mechanism can reciprocate along the X-axis direction on the top frame. When the second motor drives the first gear to rotate, it drives the first rod and the second rod to fold or unfold, thereby providing the print head with Z-axis direction movement by adjusting the lifting height of the frame.

[0017] 3. This invention avoids interference during printing by allowing the print head to tilt during printing.

[0018] 4. The base of this invention is equipped with a third motor, and a printing platform is mounted on the output shaft of the third motor. The third motor is used to drive the printing platform to rotate. When printing a cylindrical model, the printing platform can be rotated to achieve the printing of the model, while the print head only needs to adjust its height and material supply. Furthermore, due to the two sets of folding support rod structures, the top frame can only tilt left and right in the Y-axis direction. If the interference point is in the X-axis direction, the print head cannot tilt left and right in the X-axis direction. In this case, the third motor can be used to drive the printing platform to rotate, thereby rotating the interference position to the Y-axis direction.

[0019] 5. The base of this invention is equipped with a storage battery, which is electrically connected to the controller to provide power, thereby enabling portable printing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a diagram showing the state of the invention when folded.

[0022] Figure 2 This is a state diagram during printing according to one embodiment of the present invention.

[0023] Figure 3 This is a state diagram during printing according to another embodiment of the present invention.

[0024] Figure 4 This is a structural schematic diagram of the invention from the bottom view.

[0025] Figure 5 This is a schematic diagram of one embodiment of the folding support rod of the present invention, wherein a rack is installed on the folding support rod.

[0026] Figure 6 This is a schematic diagram of another embodiment of the folding support rod of the present invention.

[0027] Figure 7 for Figure 6 Enlarged structural diagram at point A in the middle.

[0028] Figure 8 This is a schematic diagram of one embodiment of the folding support rod of the present invention, wherein a linear guide rail is installed on the folding support rod.

[0029] Figure 9 This is a schematic diagram of the structure of the grooved block of the present invention.

[0030] Figure 10 This is a schematic diagram of the connection between the top frame and the third member in another embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram illustrating the avoidance mechanism during printing, according to another embodiment of the present invention.

[0032] Figure label: Base frame 10, base 11 Top frame 20, second hinge 21, Folding support rod 30, first rod 31, second rod 32, third rod 33, first hinge 331, pin 332, first adjusting seat 34, first pivot 341, first positioning screw 342, second adjusting seat 35, second pivot 351, second positioning screw 352, folding joint mechanism 36, first gear 361, second gear 362, connecting rod 363, connecting rod 364, second motor 364, rack 37, linear guide rail 38; Z-axis lifting mechanism 40, slotted block 41, first motor 411, drive gear 412, slider 42; X-axis transverse movement mechanism 50; Print head 60; Printing platform 70; Controller 80; 90 batteries. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0035] Example 1: See Figure 1-4 A foldable 3D printing device includes a frame, a printing platform 70 mounted at the bottom of the frame, an X-axis transverse mechanism 50 mounted on the frame above the printing platform 70, the X-axis transverse mechanism 50 being capable of reciprocating along the X-axis, a print head 60 mounted on the X-axis transverse mechanism 50 and capable of reciprocating along the Y-axis, the frame including a bottom frame 10, a top frame 20, and folding support rods 30, with folding support rods 30 hinged at the four corners between the bottom frame 10 and the top frame 20, the folding support rods 30 covering... The frame includes a first rod 31, a second rod 32, and a third rod 33. A first adjustment seat 34 is fixedly installed at the four corners of the upper side of the bottom frame 10. The first rod 31 is hinged to the first adjustment seat 34 via a first pivot 341. The second rod 32 is installed at the upper end of the first rod 31 via a folding joint mechanism 36. The second adjustment seat 35 is hinged to the upper end of the second rod 32 via a second pivot 351. The upper side of the second adjustment seat 35 is fixedly connected to the third rod 33. The third rod 33 is installed and connected to the top frame 20.

[0036] The printing platform 70 provides a platform base support for the 3D printing material. The X-axis transverse mechanism 50 can reciprocate along the X-axis direction, providing the X-axis running direction for the print head 60. The print head 60 is mounted on the X-axis transverse mechanism 50 and can reciprocate along the Y-axis direction, providing the Y-axis running direction for the print head 60. By different settings of the folding support rod 30, the Z-axis lifting mechanism 40 can move up and down to provide the Z-axis movement for the print head 60, or the height adjustment of the frame can provide the Z-axis movement for the print head 60. This invention not only enables the 3D printing equipment to be folded, but also allows the X-axis transverse mechanism 50 to slide smoothly during printing, preventing the X-axis transverse mechanism 50 from getting stuck due to unevenness. Furthermore, the height adjustment of the 3D printing equipment can be driven without a drive motor, or only with four drive motors, reducing the number of drive motors by half and lowering the equipment production cost.

[0037] In this embodiment, see Figure 5 The folding joint mechanism 36 includes a first gear 361, a second gear 362, and a connecting rod 363. The first gear 361 and the second gear 362 are respectively fixedly installed at the ends of the first rod 31 and the second rod 32, close to each other. The first gear 361 and the second gear 362 mesh. Connecting rods 363 are respectively provided on both sides of the first gear 361 and the second gear 362, and the two ends of the connecting rods 363 are respectively hinged to the central pivots of the first gear 361 and the second gear 362. Because the first gear 361 and the second gear 362 are meshed, when the printing device is moved from... Figure 1 The folding state in the middle is adjusted to Figure 3 When the frame is in the unfolded state, the first rod 31 and the second rod 32 can be synchronously adjusted from the folded state to the longitudinal alignment device to ensure the stability of the frame after unfolding and to make the top frame 20 and the bottom frame 10 parallel.

[0038] See Figure 3 , 5 At least one folding support rod 30 has a rack 37 fixedly installed on its first member 31, second member 32, and third member 33. When the first member 31 and second member 32 are unfolded and coaxial, the racks 37 on the first member 31, second member 32, and third member 33 abut against each other. A grooved block 41 is slidably installed on the rack 37, and the grooved block 41 slidably hooks the side of the rack 37 away from the tooth surface. See [reference needed] Figure 9 A first motor 411 is mounted on the slotted block 41, and a drive gear 412 is mounted on the output shaft of the first motor 411. The drive gear 412 meshes with the rack 37. With the above structure, when the first motor 411 is started, it can drive the slotted block 41 to slide up and down on the rack 37.

[0039] See Figure 8Linear guide rails 38 are fixedly installed on the first member 31, the second member 32, and the third member 33 of the remaining folding support rods 30. When the first member 31 and the second member 32 are unfolded and coaxial, the linear guide rails 38 on the first member 31, the second member 32, and the third member 33 abut against and align with each other. See [reference needed] Figure 3 A slider 42 is mounted on the linear guide rail 38. This structure allows the slider 42 to slide up and down along the linear guide rail 38.

[0040] See Figure 3 , 4 The frame also includes a Z-axis lifting mechanism 40, with the four corners of the Z-axis lifting mechanism 40 being fixed to the slotted block 41 and the slider 42, respectively; the X-axis transverse mechanism 50 is mounted on the Z-axis lifting mechanism 40.

[0041] In this embodiment, after the four folding support rods 30 are unfolded, as follows: Figure 3 As shown, the Z-axis lifting mechanism 40 can slide up and down on the folding support rod 30 via the first motor 411, thereby enabling the print head 60 to move upward gradually according to the printing height during printing, and realizing the Z-axis direction running motion of the print head 60 through the up and down movement of the Z-axis lifting mechanism 40.

[0042] In this embodiment, linear sliders are installed at both ends of the X-axis transverse mechanism 50, and linear guides are installed on the upper sides of the left and right ends of the Z-axis lifting mechanism 40, respectively. The linear sliders on both sides are slidably connected to the linear guides on both sides. The X-axis transverse mechanism 50 can be driven by a ball screw drive structure or a synchronous belt drive structure, thereby sliding back and forth on the Z-axis lifting mechanism 40 along the X-axis direction.

[0043] Similarly, the print head 60 can be slidably mounted on a linear guide rail on the lower side of the X-axis transverse mechanism 50. A ball screw drive structure or a synchronous belt drive structure is mounted on the lower side of the X-axis transverse mechanism 50. The print head 60 is connected to the ball screw drive structure or the synchronous belt drive structure for transmission, thereby causing the print head 60 to reciprocate along the X-axis transverse mechanism 50, that is, in the Y-axis direction.

[0044] See Figure 2 A first positioning screw 342 is screwed onto the first adjusting seat 34. When the first positioning screw 342 abuts against the first rod 31, it positions the first rod 31. A second positioning screw 352 is screwed onto the second adjusting seat 35. When the second positioning screw 352 abuts against the second rod 32, it positions the second rod 32. After the folding support rod 30 is unfolded, the first positioning screw 342 and the second positioning screw 352 are tightened. The first positioning screw 342 abuts against the first rod 31, and the second positioning screw 352 abuts against the second rod 32, thereby longitudinally aligning and limiting the first rod 31 and the second rod 32. When the folding support rod 30 is folded, see [reference needed]. Figure 1 After tightening the first positioning screw 342 and the second positioning screw 352, the frame can be prevented from moving freely up and down. After the folding support rod 30 is folded and unfolded, the first positioning screw 342 and the second positioning screw 352 are loosened.

[0045] See Figure 1 When folding, the Z-axis lifting mechanism 40 moves to the third link 33.

[0046] Example 2: The difference between this embodiment and Embodiment 1 is that, see [link to Embodiment 1] Figure 11 In this embodiment, the Z-axis lifting mechanism 40 is not used. The X-axis transverse mechanism 50 is installed on the top frame 20. The X-axis transverse mechanism 50 can reciprocate along the X-axis direction on the top frame 20.

[0047] In this embodiment, see Figure 6 , 7 The folding joint mechanism 36 includes a first gear 361, a second gear 362, and a connecting rod 363. A second motor 364 is mounted on the end of the first rod 31 and the second rod 32 closest to each other. The first gear 361 is fixedly mounted on the output shaft of the second motor 364, and the second gear 362 is fixedly mounted on the end of the second rod 32 closest to the first rod 31. The second gears 362 mesh with each other. Both sides of the first gear 361 are hinged to one end of the connecting rod 363 on the output shaft of the second motor 364, and the other end of the connecting rod 363 is hinged to the central pivot of the second gear 362. The top frame 20 is driven to rise and fall by the second motor 364. When the second motor 364 drives the first gear 361 to rotate, it drives the first rod 31 and the second rod 32 to fold or unfold, thereby providing Z-axis movement for the print head 60 by adjusting the height of the frame.

[0048] See Figure 10 , 11 The folding support rods 30 are arranged in pairs. The top of the third rod 33 of one pair of folding support rods 30 is fixedly connected to the top frame 20. The top of the third rod 33 of the other pair of folding support rods 30 is respectively fixed with a first hinge seat 331. A second hinge seat 21 is fixed to the lower side of the top frame 20 at the corresponding positions of the two first hinge seats 331. The first hinge seats 331 and the second hinge seats 21 are hinged together by a pin 332. With this structure, the top frame 20 can be tilted by the different unfolding angles of the two sets of folding support rods 30, allowing the print head 60 to tilt during printing, thereby avoiding interference during printing. Figure 11As shown, this illustrates printing an object divided into left and right parts above the center. If printed using conventional placement, the print head 60 prints on both sides in a single plane within the central cutout area. The print head 60 has a long free travel distance in the cutout area, and due to the printing material within the nozzle of the print head 60, "stringing" occurs during the print head 60's translation. For example, when the print head 60 moves from the left printing area through the central cutout area to the right, this "stringing" causes burrs at the contact point on the right printing area. Furthermore, the initial contact point on the right may experience indentation due to insufficient material supply during printing. To address this issue, we designed the printing process to separate the two sides. The advantages of this method are: firstly, the print head 60 does not need to repeatedly pass through the cutout area, saving time; secondly, it reduces stringing and indentation by over 90%, improving print quality. However, this method also introduces issues such as... Figure 11 The interference problem is illustrated. This invention avoids interference during printing by allowing the print head 60 to tilt during printing. (As shown...) Figure 11 In the enlarged view, the solid line of printhead 60 shows the tilted state of printhead 60, and the dashed line of printhead 60 shows the state of interference when printhead 60 is in a vertical state. Example 3: Based on Example 1 or Example 2, see Figure 2 A base 11 is installed inside the base frame 10, and a third motor is installed inside the base 11. A printing platform 70 is mounted on the output shaft of the third motor. The third motor drives the printing platform 70 to rotate. Its advantages are as follows: First, when printing cylindrical models, the printing platform 70 can be rotated to achieve the printing, while the print head 60 only needs to be adjusted for height and material feeding; Second, see... Figure 2 Because the two sets of folding support rods 30 structure means that the top frame 20 can only tilt left and right in the Y-axis direction, if the interference point is in the X-axis direction, the print head 60 cannot tilt left and right in the X-axis direction. In this case, the third motor can be used to drive the printing platform 70 to rotate, and the interference position can be rotated to the Y-axis direction.

[0049] Example 4: Based on Example 3, see Figure 2 A controller 80 is installed on the bottom frame 10. The controller 80 is electrically connected to and controls the first motor 411, the second motor 364, the third motor, the Y-axis transverse movement mechanism 50, and the print head 60.

[0050] Example 5: Based on Example 4, see Figure 4The base 11 contains a storage battery 90, which is electrically connected to the controller 80 to provide power, thereby enabling portable printing.

[0051] Example 6: The present invention also discloses a control method for controlling the operation of a foldable 3D printing device in Embodiment 4. The control method includes the following steps: When the printing device is in the folded state, turn on the power, and the second motor 364 will start to unfold the printing device. During printing, the height of the print head 60 is adjusted by controlling the operation of the second motor 364; the print head 60 is adjusted to move along the X-axis by controlling the operation of the X-axis transverse mechanism 50; and the print head 60 is adjusted to move along the Y-axis by controlling the operation of the print head 60 on the X-axis transverse mechanism 50. When the model to be printed is a cylinder, printing begins after the print head 60 moves to the designated position via the X-axis transverse mechanism 50. This determines the radius of the model, controls the third motor to drive the printing platform 70 to rotate, and after one rotation, the print head 60 fills the interior. Afterward, the print head 60 adjusts the height in the Z-axis direction via the second motor 364 to improve the efficiency of printing cylinders. When there is interference in the printed model, the second motor 364 on the two sets of folding support rods 30 is controlled to move, and the tilt angle of the top frame 20 is adjusted so that the print head 60 tilts to avoid interference. The third motor is controlled to drive the printing platform 70 to rotate, so as to adjust the position to avoid interference.

[0052] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the invention. Modifications and variations made by those skilled in the art in accordance with the spirit of the invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A foldable 3D printing device, comprising a frame, a printing platform (70) mounted at the bottom of the frame, an X-axis transverse mechanism (50) mounted on the frame above the printing platform (70), the X-axis transverse mechanism (50) being capable of reciprocating along the X-axis direction, and a print head (60) mounted on the X-axis transverse mechanism (50) and capable of reciprocating along the Y-axis direction, characterized in that: The frame includes a bottom frame (10), a top frame (20), and a folding support rod (30). The folding support rod (30) is hinged at the four corners between the bottom frame (10) and the top frame (20). The folding support rod (30) includes a first rod (31), a second rod (32), and a third rod (33). The first adjustment seat (34) is fixedly installed at the four corners on the upper side of the bottom frame (10). The first rod (31) is hinged on the first adjustment seat (34) through a first pivot (341). The second rod (32) is installed at the upper end of the first rod (31) through a folding joint mechanism (36). The second adjustment seat (35) is hinged at the upper end of the second rod (32) through a second pivot (351). The upper side of the second adjustment seat (35) is fixedly connected to the third rod (33). The third rod (33) is installed and connected to the top frame (20).

2. The foldable 3D printing device according to claim 1, characterized in that: The folding joint mechanism (36) includes a first gear (361), a second gear (362), and a connecting rod (363). The first gear (361) and the second gear (362) are respectively fixedly installed at the ends of the first rod (31) and the second rod (32) that are close to each other. The first gear (361) and the second gear (362) mesh. Connecting rods (363) are respectively provided on both sides of the first gear (361) and the second gear (362). The two ends of the connecting rods (363) are respectively hinged to the central pivot of the first gear (361) and the second gear (362).

3. The foldable 3D printing device according to claim 2, characterized in that: At least one folding support rod (30) has racks (37) fixedly installed on the first rod (31), the second rod (32) and the third rod (33). When the first rod (31) and the second rod (32) are unfolded and coaxial, the racks (37) on the first rod (31), the second rod (32) and the third rod (33) abut against each other. A slotted block (41) is slidably installed on the rack (37). The slotted block (41) slidably hooks the side of the rack (37) away from the tooth surface. A first motor (411) is installed on the slotted block (41). A drive gear (412) is installed on the output shaft of the first motor (411). The drive gear (412) meshes with the rack (37). Linear guide rails (38) are fixedly installed on the first rod (31), second rod (32) and third rod (33) of the remaining folding support rods (30). When the first rod (31) and second rod (32) are unfolded coaxially, the linear guide rails (38) on the first rod (31), second rod (32) and third rod (33) abut and align, and sliders (42) are installed on the linear guide rails (38). The frame is also equipped with a Z-axis lifting mechanism (40), and the four corners of the Z-axis lifting mechanism (40) are respectively fixed to the slot block (41) and the slider (42); the X-axis transverse mechanism (50) is installed on the Z-axis lifting mechanism (40).

4. A foldable 3D printing device according to claim 3, characterized in that: A first positioning screw (342) is screwed onto the first adjusting seat (34). When the first positioning screw (342) abuts against the first rod (31), the first rod (31) is positioned. A second positioning screw (352) is screwed onto the second adjusting seat (35). When the second positioning screw (352) abuts against the second rod (32), the second rod (32) is positioned.

5. A foldable 3D printing device according to claim 1, characterized in that: The X-axis transverse mechanism (50) is mounted on the top frame (20) and can reciprocate along the X-axis direction on the top frame (20). The folding joint mechanism (36) includes a first gear (361), a second gear (362) and a connecting rod (363). A second motor (364) is mounted on the end of the first rod (31) and the second rod (32) that are close to each other. The first gear (361) is fixedly mounted on the output shaft of the second motor (364). The second gear (362) is fixedly mounted on the end of the second rod (32) and the first rod (31) that are close to each other. The second gear (362) meshes with the second gear (362). The two sides of the first gear (361) are respectively hinged to one end of the connecting rod (363) on the output shaft of the second motor (364). The other end of the connecting rod (363) is hinged to the central pivot of the second gear (362). The top frame (20) is driven to rise and fall by the second motor (364).

6. A foldable 3D printing device according to claim 5, characterized in that: The folding support rods (30) are in pairs. The top of the third rod (33) of one group of folding support rods (30) is fixedly connected to the top frame (20). The top of the third rod (33) of the other group of folding support rods (30) is respectively fixed with a first hinge seat (331). The bottom side of the top frame (20) is fixed with a second hinge seat (21) at the position corresponding to the two first hinge seats (331). The first hinge seat (331) and the second hinge seat (21) are hinged by a pin (332).

7. A foldable 3D printing device according to claim 3 or 6, characterized in that: A base (11) is installed inside the bottom frame (10), a third motor is installed inside the base (11), and a printing platform (70) is installed on the output shaft of the third motor. The third motor is used to drive the printing platform (70) to rotate.

8. A foldable 3D printing device according to claim 7, characterized in that: A controller (80) is installed on the bottom frame (10). The controller (80) is electrically connected to and controls the first motor (411), the second motor (364), the third motor, the Y-axis transverse mechanism (50), and the print head (60).

9. A foldable 3D printing device according to claim 8, characterized in that: A storage battery (90) is installed inside the base (11), and the storage battery (90) is electrically connected to the controller (80) for power supply.

10. A control method, characterized in that, The control method for controlling the operation of the foldable 3D printing device according to claim 8 includes the following steps: When the printing device is in a folded state, turn on the power, and the second motor (364) will start to unfold the printing device; During printing, the height of the print head (60) is adjusted by controlling the operation of the second motor (364); the print head (60) is adjusted to move along the X-axis by controlling the operation of the X-axis transverse mechanism (50); and the print head (60) is adjusted to move along the Y-axis by controlling the operation of the print head (60) on the X-axis transverse mechanism (50). When the model to be printed is a cylinder, printing is performed after the print head (60) moves to the designated position by the X-axis transverse mechanism (50). The third motor is controlled to run and drive the printing platform (70) to rotate. After rotating one revolution, the print head (60) fills the interior. Then the print head (60) is adjusted in the Z-axis height direction by the second motor (364). When there is interference in the printed model, the second motor (364) on the two sets of folding support rods (30) is controlled to move, and the tilt angle of the top frame (20) is adjusted so that the print head (60) tilts to avoid interference. The third motor is controlled to drive the printing platform (70) to rotate to adjust the position to avoid interference.

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