Leveling device and photocuring 3D printer

Abstract

The utility model relates to the technical field of 3D printing, and discloses a leveling device and a photocuring 3D printer. The leveling device is used for leveling the 3D printer and comprises a support assembly, the support assembly comprises a mounting part and cantilever parts, the cantilever parts are symmetrically arranged on the two sides of the mounting part and connected with the mounting part, a containing groove is formed between the mounting part and the cantilever parts, and the cantilever parts are connected with a middle plate assembly; the detection assembly is arranged on the support assembly and connected with the controller, and the detection assembly is used for detecting the deformation quantity of the support assembly; and the leveling assembly is connected with the support assembly and the controller, and the leveling assembly is used for adjusting the distance between the printing platform and the printing screen under the control of the controller. In this way, the distance between the printing platform and the printing screen can be automatically adjusted, and the printing success rate and the printing quality are improved.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a leveling device and a light-curing 3D printer. Background Art

[0002] Photocuring 3D printers generally use a light source in a specific wavelength range to irradiate liquid resin to initiate a photopolymerization reaction, so that the photocurable resin in the area irradiated by the light source is solidified from the liquid state, and the object to be formed can be obtained after curing layer by layer.

[0003] There are three types of related photocuring printing technologies: LCD (liquid crystal surface photocuring), SLA (laser point light source curing), and DLP (projector surface light source curing). In LCD technology, an LCD screen is set on the middle plate of the printer. After the resin is poured into the material tank, it is fixed on the LCD screen by hand screws on both sides. At this time, the release film of the material tank is in contact with the upper surface of the LCD screen. The printing platform is driven by the lifting drive assembly to descend into the resin, and maintain a relatively uniform gap with the release film at the bottom of the material tank. After the ultraviolet light below the LCD screen passes through the pattern displayed on the screen, it is projected onto the resin above the release film, causing the resin between the printing platform and the release film to solidify.

[0004] In the above process, the printing quality of the first layer of the model plays a key role in the quality of the overall molding of the model. Since the release film relies on the LCD screen for support, the inclination and flatness of the release film are determined by the LCD screen. Therefore, in order to ensure the printing accuracy of the first layer of the product, it is necessary to ensure that the LCD screen and the molding surface of the printing platform are parallel and the gap distance is uniform and accurate.

[0005] Currently, the printing platform is mainly leveled manually by connecting the waist-shaped holes of the adapter plate between the handle and the printing platform and locking the screws on both sides to ensure that the bottom surface of the printing platform is parallel to the LCD screen. However, this manual leveling method will cause the printing platform and the LCD screen to be non-parallel and the gap to be uneven during the screw tightening process, which can easily lead to uneven thickness of the first layer of the model, and it cannot be evenly and firmly bonded to the printing platform, resulting in printing failure. Utility Model Content

[0006] The present application provides a leveling device and a light-curing 3D printer, which can automatically adjust the flatness of the printing screen and improve the printing success rate and printing quality.

[0007] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a leveling device for leveling a 3D printer, wherein the 3D printer comprises a middle plate assembly provided with a printing screen, a printing assembly provided with a printing platform, and a controller, and the leveling device comprises:

[0008] A bracket assembly, the bracket assembly comprising a mounting portion and cantilever portions symmetrically arranged on both sides of the mounting portion and respectively connected to the mounting portion, a receiving groove is formed between the mounting portion and the cantilever portion, and the cantilever portion is connected to the middle plate assembly;

[0009] a detection component, the detection component being disposed on the support component and connected to the controller, the detection component being used to detect a deformation amount of the support component; and

[0010] A leveling component, wherein the leveling component is connected to the support component and the controller respectively, and the leveling component is used to adjust the distance between the printing platform and the printing screen under the control of the controller.

[0011] According to one embodiment of the present application, the middle plate assembly includes a screen floating plate for fixing the printing screen and a middle plate connected to the screen floating plate, the middle plate is located on the surface of the screen floating plate away from the printing screen, and the cantilever portion is fixed to a side of the screen floating plate away from the printing screen.

[0012] According to one embodiment of the present application, the leveling assembly includes:

[0013] A driving unit, the driving unit is fixed to a side of the middle plate away from the screen floating plate and connected to the controller;

[0014] a transmission part, one end of which is connected to the driving part; and

[0015] A connecting part, wherein the connecting part is fixed on the mounting part and is threadedly connected to the other end of the transmission part so as to adjust the distance between the printing platform and the printing screen in the transmission direction of the transmission part.

[0016] According to one embodiment of the present application, the detection component is a full-bridge strain gauge.

[0017] According to one embodiment of the present application, the cantilever portion includes:

[0018] a first bending section, wherein the first bending section is connected to the mounting portion;

[0019] A second bending section, wherein the second bending section is connected to the first bending section, and the second bending section is parallel to the mounting portion and is not arranged on the same plane.

[0020] In order to solve the above technical problems, another technical solution adopted by the present application is to provide a light-curing 3D printer, comprising:

[0021] Controller;

[0022] Base plate assembly;

[0023] A middle plate assembly, the middle plate assembly is arranged on the bottom plate assembly, and a printing screen is arranged on the middle plate assembly;

[0024] A material trough assembly, the material trough assembly is used to contain the light-curing material and is supported by the middle plate assembly;

[0025] A light source assembly; the light source assembly is disposed in the base plate assembly and is used to provide light for curing the light-curable material;

[0026] A lifting assembly, the lifting assembly is arranged on the middle plate assembly and connected to the controller;

[0027] A printing assembly, the printing assembly is arranged corresponding to the trough assembly and connected to the lifting assembly, the printing assembly includes a printing platform; and

[0028] At least one of the leveling devices is fixed to the middle plate assembly and connected to the controller, and adjusts the distance between the printing platform and the printing screen under the control of the controller.

[0029] According to one embodiment of the present application, the middle plate assembly includes: a screen floating plate for fixing the printing screen and a middle plate connected to the screen floating plate, the middle plate is located on the surface of the screen floating plate away from the printing screen, and the bracket assembly of the leveling device is fixed to a side of the screen floating plate away from the printing screen.

[0030] According to one embodiment of the present application, a mounting seat is provided on a side of the middle plate away from the screen floating plate, a receiving cavity for accommodating the bracket assembly is provided inside the mounting seat, a through hole penetrating the receiving cavity is provided on the bottom wall of the mounting seat, a driving part of the leveling assembly is fixed to the bottom wall, and a transmission part of the leveling assembly is passed through the through hole and connected to the connecting part of the leveling assembly.

[0031] According to one embodiment of the present application, the light source assembly includes a first heat sink block arranged in the base plate assembly, a first lamp board arranged on the first heat sink block, and a reflective cup covered on the first lamp board, one end of the reflective cup is connected to the first heat sink block, and the other end is connected to the screen floating plate.

[0032] According to one embodiment of the present application, the light source assembly includes a first bracket connected to the middle plate, a second bracket arranged on the first bracket, an optical axis arranged on the first bracket, a bearing passing through the optical axis and slidably connected to the optical axis, a second heat sink connected to the bearing, a second lamp board arranged on the second heat sink, a light shield arranged on the second lamp board, and a drive motor arranged on the second bracket and connected to the optical axis.

[0033] The beneficial effects of the present application are as follows: a leveling device for leveling a 3D printer comprises: a bracket assembly, the bracket assembly comprising a mounting portion and cantilever portions symmetrically arranged on both sides of the mounting portion and respectively connected to the mounting portion, a receiving groove being formed between the mounting portion and the cantilever portion, and the cantilever portion being connected to the middle plate assembly; a detection assembly, the detection assembly being arranged on the bracket assembly and connected to the controller, the detection assembly being used to detect the deformation amount of the bracket assembly; a leveling assembly, the leveling assembly being respectively connected to the bracket assembly and the controller, the leveling assembly being used to adjust the distance between the printing platform and the printing screen under the control of the controller, the deformation amount of the bracket assembly being detected by the detection assembly, and the controller controlling the leveling assembly to automatically adjust the distance between the printing platform and the printing screen according to the deformation amount, thereby improving the printing success rate and printing quality, and avoiding printing failure due to non-parallelism and uneven gap between the printing platform and the printing screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the first structure of a light-curing 3D printer in an embodiment of the present application;

[0035] Figure 2 yes Figure 1 Schematic diagram of the explosion structure;

[0036] Figure 3 yes Figure 2 Exploded schematic diagram of some structures in;

[0037] Figure 4 yes Figure 3 Schematic diagram of the structure after assembly;

[0038] Figure 5 yes Figure 4 The cross-section along the BB line;

[0039] Figure 6 yes Figure 5 Schematic diagram of the local enlarged structure of the middle C area;

[0040] Figure 7 yes Figure 3 A schematic diagram of the local enlarged structure of the middle A area;

[0041] Figure 8 This is a schematic diagram of the first state of the light-curing 3D printer in the embodiment of the present application;

[0042] Fig. 9 This is a schematic diagram of the second state of the light-curing 3D printer in the embodiment of the present application;

[0043] Fig.10This is a schematic diagram of the second structure of the light-curing 3D printer in the embodiment of the present application;

[0044] Fig.11 yes Fig.10 Schematic diagram of the structure of the light source component.

[0045] The meanings of the symbols in the accompanying drawings are:

[0046] 100-light-curing 3D printer; 10-bottom plate assembly; 20-middle plate assembly; 30-tank assembly; 40-light source assembly; 50-lifting assembly; 60-printing assembly; 70-leveling device; 11-bottom plate; 12-support column; 13-foot pad; 21-printing screen; 22-screen floating plate; 23-middle plate; 24-screen pressing sheet; 25-light shielding sheet; 220-accommodating space; 230-accommodating cavity; 231-mounting seat; 31-tank; 41-first heat sink; 42-first light board; 43-reflective cup; 401-first bracket; 402-second bracket; 403-optical axis; 404 -bearing; 405-second heat sink; 407-light shield; 408-second drive motor; 51-profile; 52-first drive motor; 53-linear guide; 54-slider; 55-ball screw and nut; 56-bearing seat; 57-connecting arm; 58-coupling; 61-printing platform; 62-handle; 63-screw; 71-bracket assembly; 72-detection assembly; 73-leveling assembly; 711-installation part; 712-cantilever part; 713-accommodating groove; 7121-first bending section; 7122-second bending section; 731-driving part; 732-transmission part; 733-connecting part. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] The terms "first", "second" and "third" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of the present application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0049] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0050] Figure 1 is a schematic diagram of the structure of a light-curing 3D printer in an embodiment of the present application, Figure 2 yes Figure 1 Schematic diagram of the explosion structure. Figure 1 and Figure 2As shown, the photocuring 3D printer 100 includes a controller (not shown in the figure), a bottom plate assembly 10, a middle plate assembly 20, a trough assembly 30, a light source assembly 40, a lifting assembly 50, a printing assembly 60 and at least one leveling device 70. Among them, the middle plate assembly 20 is arranged on the bottom plate assembly, and a printing screen 21 is arranged on the middle plate assembly 20; the trough assembly 30 is used to accommodate the photocurable material and is supported by the middle plate assembly 20; the light source assembly 40 is arranged in the bottom plate assembly 10 and is used to provide light for curing the photocurable material; the lifting assembly 50 is arranged on the middle plate assembly 20 and connected to the controller; the printing assembly 60 is arranged corresponding to the trough assembly 30 and connected to the lifting assembly 50, and the printing assembly 60 includes a printing platform 61; the leveling device 70 includes: a bracket assembly 71, a detection assembly 72 and a leveling assembly 73. The bracket assembly 71 includes a mounting portion 711 and cantilever portions 712 symmetrically arranged on both sides of the mounting portion 711 and respectively connected to the mounting portion 711, a receiving groove 713 is formed between the mounting portion 711 and the cantilever portion 712, and the cantilever portion 712 is connected to the middle plate assembly 20; the detection assembly 72 is arranged on the bracket assembly 71 and connected to the controller, and the detection assembly 72 is used to detect the deformation of the bracket assembly 71; the leveling assembly 73 is respectively connected to the bracket assembly 71 and the controller, and the leveling assembly 73 is used to adjust the distance between the printing platform 61 and the printing screen 21 under the control of the controller, the leveling device 70 detects the deformation of the bracket assembly 71 through the detection assembly 72, and the controller controls the leveling assembly 73 to automatically adjust the distance between the printing platform 61 and the printing screen 21 according to the deformation, thereby greatly reducing the probability of the first layer of the board falling off in subsequent printing, while reducing manual operation errors and improving the printing success rate and printing quality, and solving the problem of printing failure caused by the non-parallelism and uneven gap between the printing platform 61 and the printing screen 21.

[0051] Furthermore, the print screen 21 has a display function, such as an LED screen or other types of imaging screens.

[0052] For further information, see Figure 2 and Figure 3 The middle plate assembly 20 includes a screen floating plate 22 for fixing the printing screen 21 and a middle plate 23 connected to the screen floating plate 22. The middle plate 23 is arranged on the surface of the screen floating plate 22 away from the printing screen 21. Figure 2 and Figure 3, a receiving space 220 is provided in the screen floating plate 22, and the middle plate assembly 20 further comprises a screen pressing sheet 24 for fixing the print screen 21 and a light shielding sheet 25 connecting the print screen 21 and the screen floating plate 22. When the middle plate assembly 20 is assembled, the print screen 21, the screen floating plate 22 and the middle plate 23 are arranged in sequence from top to bottom, and the opposite sides of the print screen 21 are fixed in the receiving space 220 of the screen floating plate 22 by the screen pressing sheet 24, and the light shielding sheet 25 is installed between the print screen 21 and the screen floating plate 22 to cover the light leakage area between the print screen 21 and the middle plate 23, so as to prevent the phenomenon of excess curing in the trough assembly 30 caused by the light leakage area, thereby improving the printing accuracy and printing quality.

[0053] For further information, see Figures 3 to 6 , a mounting seat 231 is provided on one side of the middle plate 23 away from the screen floating plate 22, and a receiving cavity 231 for accommodating the bracket assembly 71 is provided inside the mounting seat 231. The bracket assembly 71 is accommodated in the receiving cavity 230, so that the structure of the light-curing 3D printer 100 is more compact and more beautiful. Furthermore, at least one leveling device 70 is provided, and the specific number of settings can be set according to actual needs. The mounting seat 231 and the leveling device 70 are arranged in a one-to-one correspondence, that is, the mounting seat 231 and the bracket assembly 71 are arranged in a one-to-one correspondence. As an embodiment, the printing screen 21 is rectangular, and two leveling devices 70 can be provided. The two leveling devices 70 are located on both sides of the printing screen 21, and two mounting seats 231 are provided at the positions of the middle plate 23 corresponding to the bracket assembly 71; or three leveling devices 70 are provided, and the three leveling devices 70 are respectively located on the outsides of different corners of the printing screen 21, and three mounting seats 231 are provided at the positions of the middle plate 23 corresponding to the bracket assembly 71. As a more preferred embodiment, please refer to Figure 3 , four leveling devices 70 can be provided, and the four leveling devices 70 are respectively located outside the four corners of the printing screen 21, and four mounting seats 231 are provided at the positions of the middle plate 23 corresponding to the bracket assembly 71. It can be understood that the specific distribution positions of the leveling devices 70 can be adjusted according to the actual structure, so that the leveling devices 70 can adjust the inclination angle of the printing screen 21 from different positions, thereby adjusting the distance between the printing platform 61 and the printing screen 21.

[0054] For further information, see Figures 3 to 6The leveling assembly 73 further includes: a driving part 731, a transmission part 732 and a connecting part 733. The bottom wall of the mounting seat 231 is provided with a through hole penetrating the receiving cavity 230. The driving part 731 of the leveling assembly 73 is fixed to the bottom wall, and the transmission part 732 of the leveling assembly 73 is passed through the through hole and connected to the connecting part 733 of the leveling assembly 73. The driving part 731 is connected to the controller; the connecting part 733 is fixed to the mounting part 711; one end of the transmission part 732 is connected to the driving part 731, and the other end of the transmission part 732 is passed through the through hole and is threadedly connected to the connecting part 733. The driving part 731 drives the transmission part 732 to move, so as to push and / or pull back the screen floating plate 22 in the transmission direction of the transmission part 732, thereby adjusting the distance between the printing platform 61 and the printing screen 21. As an embodiment, the driving part 731 is a motor, the transmission part 732 is a screw, and the connecting part 733 is a nut. The output shaft of the motor is transmission-connected to one end of the screw, and the other end of the screw is threadedly connected to the nut. The motor drives the screw to rotate, so that the screw and the nut rotate relative to each other, thereby creating a threaded pushing effect between the screw and the bracket assembly 71, pushing and / or pulling back the screen floating plate 22 in the transmission direction, thereby adjusting the distance between the printing platform 61 and the printing screen 21.

[0055] See also Figure 3 and Figure 7 , the cantilever part 712 is fixed to the side of the screen floating plate 22 away from the printing screen 21. Further, the cantilever part 712 includes: a first bending section 7121 and a second bending section 7122, the first bending section 7121 is connected to the mounting part 711; the second bending section 7122 is connected to the first bending section 7121, and the second bending section 7122 is parallel to the mounting part 711 and is not arranged coplanar. It can be understood that the cantilever part 712 is an inverted "J" shape or a "concave" shape, and the second bending section 7122 is fixedly connected to the side of the screen floating plate 22 away from the printing screen 21 to achieve the fixation of the bracket assembly 71.

[0056] For further information, see Figure 6 , the detection component 72 is arranged on the side of the mounting portion 711 away from the receiving groove 713, and the specific installation position of the detection component 72 can also be adjusted according to the actual structure. Specifically, the detection component 72 is arranged at the bottom of the mounting portion 711 and away from the receiving groove 713. When the bracket assembly 71 is deformed, the torque force received by the installation position of the detection component 72 is the largest, and the deformation amount is also the largest, which can more sensitively detect the deformation amount of the bracket assembly, thereby improving the leveling accuracy. The detection component 72 and the leveling component 73 are arranged in a one-to-one correspondence. In order to improve the detection accuracy, the detection component 72 is a strain gauge sensor, and specifically a full-bridge strain gauge can be used. When the full-bridge strain gauge detects deformation, its resistance value will change with the deformation amount, and the resistance change is converted into a voltage change.

[0057] See also Figure 8-Figure 9 During the leveling process, the printing platform 61 drops to the lowest point. When the four corner areas of the printing platform 61 are in contact with the upper surface of the printing screen 21 respectively, the downward pressure applied to the printing screen 21 will be transmitted to the bracket assembly 71 through the screen floating plate 22. At this time, the bracket assembly 71 is deformed under the action of the downward pressure. When the detection component 72 detects that the deformation of the bracket assembly 71 is greater than the preset value, it sends information to the controller, and the controller controls the lifting component 50 to stop moving, thereby stopping the printing platform 61, and then obtains the current rotation angle of the driving unit 731 and the initial height value of the printing platform 61. The relative height values ​​of the current four corners of the printing platform 61 and the contact position of the printing screen 21 can be calculated based on the rotation angle and the rotation angle. Before starting to formally print the first layer, the controller controls the drive unit 731 to drive the transmission unit 732 to move according to the relative height value of the printing platform 61 and the printing screen 21 obtained during the leveling process, so as to compensate for the height error between the printing platform 61 and the printing screen 21, so that the gap between the lower surface of the printing platform 61 and the upper surface of the printing screen 21 is maintained at a predetermined distance and parallel to each other, thereby realizing automatic leveling operation, greatly reducing the probability of the first layer of subsequent printing falling off, and improving the printing success rate and printing quality while reducing manual operation errors.

[0058] For further information, see Figure 1 and Figure 2 The trough assembly 30 is detachably connected to the middle plate assembly 20, and the trough assembly 30 further includes a trough 31 detachably connected to the screen floating plate 22 and a release film (not shown) disposed close to the printing screen 21. The trough assembly 30 of this embodiment can be leveled in conjunction with the screen floating plate 22, thereby improving printing accuracy and printing quality.

[0059] For further information, see Figure 1 and Figure 2The lifting assembly 50 also includes a profile 51, a first drive motor 52, a linear guide rail 53, a slider 54, a ball screw and a nut 55, a bearing seat 56, a connecting arm 57 and a coupling 58. Among them, the first drive motor 52 is fixed on the lower surface of the middle plate 23 and connected to the controller, the profile 51 is fixed on the upper surface of the middle plate 23 and is located on one side of the trough assembly 30, and the profile 51 is provided with installation grooves at intervals inside. Two sets of linear guides 53 are arranged, which are respectively fixed on the installation grooves; two sets of bearing seats 56 are arranged, one set is arranged at the upper end of the profile 51, and the other set is arranged at the lower end of the profile 51. The ball screw and nut 55 are connected to the first drive motor 52 through a coupling 58, and the slider 54 is arranged corresponding to the linear guide 53 and is slidably connected to the linear guide 53. One end of the connecting arm 57 is fixedly connected to the slider 54 and the ball screw and nut 55, and the other end is fixedly connected to the printing assembly 60; the first drive motor 52 drives the ball screw and nut 55 to drive the slider 54, the connecting arm 57 and the printing assembly 60 to perform lifting and lowering movements along the linear guide 53 under the guide limit of the bearing seat 56, thereby ensuring the accuracy of the up and down movement of the printing platform 61. During the leveling process, when the detection component 72 detects that the deformation of the bracket component 71 is greater than a preset value, information is sent to the controller, and the controller controls the first drive motor 52 to stop moving, thereby stopping the printing platform 61.

[0060] For further information, see Figure 1 and Figure 2 The printing assembly 60 is arranged corresponding to the trough assembly 30 and is fixedly connected to the lifting assembly 50. The printing assembly 60 also includes a handle 62 and a screw 63. The handle 62 is connected to the printing platform 61, and the handle 62 is fixedly connected to the connecting arm 57 by the screw 63. There is no reserved adjustment space between the handle 62 and the printing platform 61 of this embodiment. The screw 63 and the connecting arm 57 are used to fix them, so as to avoid the uneven gap between the printing platform 61 and the printing screen 21 caused by manual operation errors, thereby ensuring the printing effect of the first layer of the printed model, and the bonding is firm and will not fall off, thereby improving the overall printing accuracy and success rate of the model.

[0061] For further information, see Figure 1 and Figure 2 The bottom plate assembly 10 includes a bottom plate 11, a support column 12 and a foot pad 13. The foot pad 13 is fixed to the lower surface of the bottom plate 11, and the support column 12 is fixed between the middle plate 23 and the bottom plate 11 to form a whole machine frame.

[0062] For further information, see Figure 1 and Figure 2The light source assembly 40 further includes a first heat sink 41 disposed on the bottom plate 11, a first lamp board 42 disposed on the first heat sink 41, and a reflective cup 43 covered on the first lamp board 42. One end of the reflective cup 43 is connected to the first heat sink 41, and the other end is connected to the screen floating plate 22, so that the light source assembly 40 can be leveled following the leveling of the printing screen 21, thereby achieving the first lamp board 42 and the printing screen 21 to remain in a relatively parallel position, thereby improving the printing accuracy and printing quality.

[0063] Fig.10 is a second structural diagram of a light-curing 3D printer in the embodiment of the present application, which can be understood as: Fig.10 The light source assembly 40 in is replaced by Figure 1 Light source assembly 40 in the Fig.10 and Fig.11 The light source assembly 40 also includes a first bracket 401 connected to the middle plate 23, a second bracket 402 arranged on the first bracket 401, an optical axis 403 arranged on the first bracket 401, a bearing 404 passing through the optical axis 403 and slidably connected to the optical axis 403, a second heat sink 405 connected to the bearing 404, a second lamp board (not shown) arranged on the second heat sink 405, a light shield 407 covered on the second lamp board, and a second drive motor 408 arranged on the second bracket 402 and connected to the optical axis 403, and the second drive motor 408 is connected to the controller. The light source assembly 40 adopts a method of sampling a moving scanning light source, and the second drive motor 408 drives the bearing 404 to drive the second heat sink 405 to reciprocate on the optical axis 403, thereby driving the second lamp board and the light shield 407 to move together, so as to increase the light for curing the photocurable material for printing the model. This setting method can effectively reduce the height of the whole machine, which is conducive to the miniaturization of the photocuring 3D printer 100.

[0064] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A leveling device, characterized in that: For leveling a 3D printer, the 3D printer comprises a middle plate assembly provided with a printing screen, a printing assembly provided with a printing platform and a controller, the leveling device comprises: A bracket assembly, the bracket assembly comprising a mounting portion and cantilever portions symmetrically arranged on both sides of the mounting portion and respectively connected to the mounting portion, a receiving groove is formed between the mounting portion and the cantilever portion, and the cantilever portion is connected to the middle plate assembly; a detection component, the detection component being disposed on the support component and connected to the controller, the detection component being used to detect a deformation amount of the support component; and A leveling component, wherein the leveling component is connected to the support component and the controller respectively, and the leveling component is used to adjust the distance between the printing platform and the printing screen under the control of the controller.

2. The leveling device according to claim 1, characterized in that: The middle plate assembly includes a screen floating plate for fixing the printing screen and a middle plate connected to the screen floating plate. The middle plate is located on a surface of the screen floating plate away from the printing screen, and the cantilever portion is fixed to a side of the screen floating plate away from the printing screen.

3. The leveling device according to claim 2, characterized in that: The leveling assembly comprises: A driving unit, the driving unit is fixed to a side of the middle plate away from the screen floating plate and connected to the controller; a transmission part, one end of which is connected to the driving part; and A connecting part, wherein the connecting part is fixed on the mounting part and is threadedly connected to the other end of the transmission part so as to adjust the distance between the printing platform and the printing screen in the transmission direction of the transmission part.

4. The leveling device according to claim 1, characterized in that: The detection component is a full-bridge strain gauge.

5. The leveling device according to claim 1, characterized in that: The cantilever portion comprises: a first bending section, wherein the first bending section is connected to the mounting portion; A second bending section, wherein the second bending section is connected to the first bending section, and the second bending section is parallel to the mounting portion and is not arranged on the same plane.

6. A light-curing 3D printer, characterized in that: include: Controller; Base plate assembly; A middle plate assembly, the middle plate assembly is arranged on the bottom plate assembly, and a printing screen is arranged on the middle plate assembly; A material trough assembly, the material trough assembly is used to contain the light-curing material and is supported by the middle plate assembly; A light source assembly; the light source assembly is disposed in the base plate assembly and is used to provide light for curing the light-curable material; A lifting assembly, the lifting assembly is arranged on the middle plate assembly and connected to the controller; A printing assembly, the printing assembly is arranged corresponding to the trough assembly and connected to the lifting assembly, and the printing assembly includes a printing platform; as well as At least one leveling device as described in any one of claims 1 to 5, wherein the leveling device is fixed to the middle plate assembly and connected to the controller, and adjusts the distance between the printing platform and the printing screen under the control of the controller.

7. The light-curing 3D printer according to claim 6, characterized in that: The middle plate assembly includes: a screen floating plate for fixing the printing screen and a middle plate connected to the screen floating plate, the middle plate is located on the surface of the screen floating plate away from the printing screen, and the bracket assembly of the leveling device is fixed to a side of the screen floating plate away from the printing screen.

8. The light-curing 3D printer according to claim 7, characterized in that: A mounting seat is provided on a side of the middle plate away from the screen floating plate, a receiving cavity for accommodating the bracket assembly is provided inside the mounting seat, a through hole penetrating the receiving cavity is provided on the bottom wall of the mounting seat, a driving part of the leveling assembly is fixed to the bottom wall, and a transmission part of the leveling assembly is passed through the through hole and connected to the connecting part of the leveling assembly.

9. The light-curing 3D printer according to claim 7, characterized in that: The light source assembly includes a first heat sink block arranged in the base plate assembly, a first lamp board arranged on the first heat sink block, and a reflective cup covered on the first lamp board, one end of the reflective cup is connected to the first heat sink block, and the other end is connected to the screen floating plate.

10. The light-curing 3D printer according to claim 7, characterized in that: The light source assembly includes a first bracket connected to the middle plate, a second bracket arranged on the first bracket, an optical axis arranged on the first bracket, a bearing passing through the optical axis and slidably connected to the optical axis, a second heat sink connected to the bearing, a second lamp board arranged on the second heat sink, a light shield arranged on the second lamp board, and a drive motor arranged on the second bracket and connected to the optical axis.

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