Leveling device and three-dimensional forming machine

Abstract

A leveling device and a three-dimensional forming machine. The leveling device comprises an adjusting mechanism (1), a lifting adjustment mechanism (2) and a detection component (6), wherein the lifting adjustment mechanism (2) is connected to a printing platform (8) of the three-dimensional forming machine via the adjusting mechanism (1); the lifting adjustment mechanism (2) is used for controlling, according to a leveling signal, a lifting motion of the printing platform (8) by means of the adjusting mechanism (1); and the adjusting mechanism (1) is used for adjusting an angle of the printing platform (8) relative to the lifting adjustment mechanism (2), such that the aim of automatic leveling can be achieved, and the leveling precision is also improved.

Description

Leveling device and three-dimensional forming machine Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a leveling device and a three-dimensional forming machine. Background Art

[0002] 3D printing is a type of rapid prototyping technology, also known as additive manufacturing. It is a technology that uses digital model files as the basis and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer.

[0003] During the 3D printing process, the flatness of the printing platform directly affects the surface flatness of the printed body, so it is often necessary to adjust the flatness of the printing platform to improve the yield of the product. In the existing technology, manual leveling is often used. For example, patent CN202023227921.1 discloses a printing platform adjustment device and a 3D printer, which adjusts the height and level of the printing platform assembly by operating a manual displacement stage. At the same time, the level ruler can directly and reliably judge whether the printing platform assembly is horizontal. The manual displacement stage is adjusted in conjunction with the level ruler. When manually leveling, the machine depends on the operator's experience, skills, degree of adjustment, and ability to judge flatness. For inexperienced operators, it is easy for the printing platform to not be leveled, and manual adjustment is inefficient.

[0004] Utility Model Content

[0005] In view of this, the utility model provides a leveling device and a three-dimensional molding machine to solve the problem that when manual leveling is performed, the machine relies on the operator's experience, skills, degree of adjustment, and ability to judge the flatness. For inexperienced operators, the printing platform is easily not leveled, and manual adjustment is inefficient.

[0006] In a first aspect, an embodiment of the present invention provides a leveling device, which is applied to a stereolithography machine and includes an adjustment mechanism, a lifting adjustment mechanism, and a detection component; the lifting adjustment mechanism is connected to the printing platform through the adjustment mechanism;

[0007] Among them, the detection component is used to detect that the print head of the three-dimensional molding machine contacts the printing platform to send a leveling signal; the lifting and adjusting mechanism is used to control the lifting and lowering movement of the printing platform through the adjustment mechanism according to the leveling signal; the adjustment mechanism is used to adjust the angle of the printing platform relative to the lifting and adjusting mechanism.

[0008] In a second aspect, an embodiment of the present invention provides a three-dimensional molding machine, comprising a print head, a printing platform and the above-mentioned leveling device, wherein the leveling device is arranged at the lower part of the printing platform, and the print head is located above the printing platform.

[0009] According to a leveling device and a three-dimensional molding machine provided by an embodiment of the present invention, a detection component detects that the print head of the three-dimensional molding machine contacts the printing platform to send a leveling signal; then the lifting and lowering adjustment mechanism controls the lifting and lowering movement of the printing platform through the adjustment mechanism according to the leveling signal, and at the same time uses the adjustment mechanism to adjust the angle of the printing platform relative to the lifting and lowering adjustment mechanism. This not only achieves the purpose of automatic leveling of the printing platform, but also improves the leveling accuracy. In addition, the adjustment mechanism can also adjust the flatness of the printing platform when the printing platform is bent, so that the printing platform can automatically be in a relatively flat state. Moreover, since the angle of the printing platform to the lifting mechanism is adjusted, which is equivalent to adjusting the angle relative to the print head, the adaptive up and down movement of the print head to adapt to the height difference of the printing platform during printing can be reduced, thereby increasing stability during high-speed printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The following drawings of the present invention are used as part of the embodiments of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention.

[0011] In the attached figure:

[0012] FIG1 is a perspective view of a leveling device according to an optional embodiment of the present invention;

[0013] FIG2 is a side view of FIG1;

[0014] Figure 3 is an explosion photo of Figure 1;

[0015] FIG4 is a perspective view of a connecting rod according to an optional embodiment of the present utility model;

[0016] FIG5 is a side view of FIG4;

[0017] FIG6 is a cross-sectional view taken along line AA of FIG5 ;

[0018] FIG7 is a front view of FIG4;

[0019] FIG8 is a cross-sectional view taken along line BB of FIG7 ;

[0020] FIG9 is a top view of a bevel gear driven wheel according to an optional embodiment of the present utility model;

[0021] FIG10 is a cross-sectional view taken along the CC direction of FIG9 ;

[0022] FIG11 is a partial cross-sectional view of the bevel gear driven wheel;

[0023] FIG12 is a structural diagram of a radial spherical plain bearing according to an optional embodiment of the present utility model;

[0024] FIG13 is a structural diagram of a second thrust ball bearing according to an optional embodiment of the present utility model;

[0025] FIG14 is a structural diagram of a first thrust ball bearing according to an optional embodiment of the present utility model;

[0026] FIG15 is a structural diagram of a platform connector according to an optional embodiment of the present invention;

[0027] FIG16 is a structural diagram of a second connecting plate according to an optional embodiment of the present utility model;

[0028] FIG17 is a structural diagram of a print head and a printing platform of a 3D modeling machine according to an optional embodiment of the present invention;

[0029] FIG18 is an exploded view of FIG17 .

[0030] Explanation of the accompanying reference numerals: 1-adjustment mechanism, 101-connecting rod, 1011-first screw head, 1012-first threaded segment, 1013-third threaded segment, 1014-recess, 102-fastening bolt, 1021-second screw head, 103-radial spherical bearing, 1031-bearing inner ring, 1032-bearing outer ring, 104-screw hole, 105-platform connecting piece, 1051-platform connecting section, 1052-bearing connecting section, 1053-strain area, 106-fastening nut, 2-lifting adjustment mechanism, 201-driving assembly, 2011-driving part, 2012-bevel gear driving wheel, 202-transmission assembly, 2021-bevel gear driven wheel, 20211-rotating shaft, 20212-through hole, 20213-second threaded segment, 203-axial load-bearing assembly, 2031-first connecting plate, 2032-first thrust ball bearing, 2033-second thrust ball bearing, 20331-seat ring, 20332-shaft ring, 2304-second connecting plate, 20341-through hole, 2035-first fastener, 3-elastic component, 4-second fastener, 5-thermal insulation part, 6-detection component, 7-print head, 8-printing platform, 801-hot bed, 8011 flexible board, 8012-adsorbent, 8013-substrate, 8014-heating part, 802-bracket. DETAILED DESCRIPTION

[0031] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.

[0032] In the first aspect, as shown in Figures 1 and 2, an embodiment of the present invention provides a leveling device, which is applied to a three-dimensional molding machine, including an adjustment mechanism 1, a lifting adjustment mechanism 2 and a detection component 6; the lifting adjustment mechanism 2 is connected to the printing platform 8 through the adjustment mechanism 1; wherein the detection component 6 is used to detect that the print head 7 of the three-dimensional molding machine contacts the printing platform 8 to send a leveling signal; the lifting adjustment mechanism 2 is used to control the lifting movement of the printing platform 8 through the adjustment mechanism 1 according to the leveling signal; the adjustment mechanism 1 is used to adjust the angle of the printing platform 8 relative to the lifting adjustment mechanism 2.

[0033] In specific applications, the number and location of the leveling devices can be set by staff according to actual needs.

[0034] In one implementation, as shown in FIG. 15 and FIG. 16 , there are three leveling devices, which are arranged in a triangle, thereby achieving the purpose of quickly leveling the printing platform 8 .

[0035] Specifically, the printing platform 8 is detected multiple times using the print head 7 of the stereolithography machine. During each detection, the print head 7 moves to a predetermined position above the printing platform 8, and then moves downward until it contacts the printing platform 8. The print head 7 applies a downward pressure to the printing platform 8, so that the detection component 6 can detect that the printing platform 8 is subjected to an external force, thereby generating a corresponding leveling signal. Based on the leveling signal, the processor of the stereolithography machine can determine that the print head 7 has contacted the printing platform 8, and then determine the distance the print head 7 has moved from the predetermined position to the distance it contacts the printing platform 8. After that, the processor can determine whether the printing platform 8 is horizontal, that is, whether the printing platform 8 is aligned with the vertical axis by comparing the movement distance of the print head 7 obtained from multiple detections. The vertical direction z is vertical. If the printing platform 8 is not in a horizontal state, that is, the printing platform 8 is not perpendicular to the vertical direction z, the controller will compare the movement distance of the print head 7 obtained by multiple detections with the reference movement distance to determine the height that needs to be adjusted, and then control the lifting adjustment mechanism 2 of the adjustment device at the corresponding position to control the lifting movement of the printing platform 8 through the adjustment mechanism 1, and during the lifting process, the adjustment mechanism 1 can adjust the angle of the printing platform 8 relative to the lifting adjustment mechanism 2. The printing platform 8 and the lifting adjustment mechanism 2 are not hard-connected to prevent the printing platform 8 from being deformed by external force, thereby reducing the error generated during the leveling process and improving the leveling accuracy.

[0036] Furthermore, if the printing platform 8 has a slight inclination, or if it is partially located in a recessed position, the adjustment mechanism 1 can automatically adjust the level of the printing platform 8, thereby automatically restoring the printing platform 8 to a horizontal position. Furthermore, when the print head 7 contacts the printing platform 8, the adjustment mechanism 1 can absorb the pressure generated by the contact, thus preventing the printing platform 8 from vibrating.

[0037] When the printing platform 8 is subjected to uneven force and bends, the adjustment mechanism 1 can adjust the flatness of the printing platform 8 and reduce the curvature, so that the printing platform 8 can automatically be in a relatively flat state.

[0038] In some embodiments, as shown in FIG. 1 to FIG. 3 , the adjustment mechanism 1 is located above the lifting adjustment mechanism 2 , thereby reducing the horizontal size of the leveling device and thus reducing the space occupied by the leveling device in the horizontal direction.

[0039] Specifically, as shown in Figures 1 to 3, Figures 4 to 8 and Figure 12, the adjustment mechanism 1 includes a radial spherical bearing 103, a platform connector 105 and a connecting rod 101; the radial spherical bearing 103 includes a bearing inner ring 1031 and a bearing outer ring 1032, the bearing inner ring 1031 is provided with an outer spherical surface, the bearing outer ring 1032 is provided with an inner spherical surface, the inner spherical surface of the bearing outer ring 1032 is slidingly connected to the outer spherical surface of the bearing inner ring 1031, and the bearing outer ring 1032 can flip around the bearing inner ring 1031; the bearing inner ring 1031 is fixedly connected to the connecting rod 101, the bearing outer ring 1032 is fixedly connected to the platform connector 105, the connecting rod 101 is connected to the lifting adjustment mechanism 2, and the platform connector 105 is used to connect to the printing platform 8.

[0040] The radial spherical plain bearing 103 has the advantages of large load capacity, impact resistance, corrosion resistance, wear resistance, self-alignment and good lubrication.

[0041] The inner ring 1031 of the bearing is fixedly connected to the connecting rod 101, so that the inner ring 1031 of the bearing is fixed, and the outer ring 1032 of the bearing is fixedly connected to the platform connector 105, so that the outer ring 1032 of the bearing can be flipped to drive the printing platform 8 to adjust the angle and produce a certain distance of displacement in the vertical direction z, thereby achieving the purpose of automatic fine-tuning of the horizontality and buffering and shock absorption.

[0042] Specifically, when the printing platform 8 is in a tilted state or the printing platform 8 is deformed, the forces exerted on various parts of the bearing outer ring 1032 of each leveling device are uneven, that is, some parts are subjected to greater forces, and some parts are subjected to smaller forces. As a result, the parts of the bearing outer ring 1032 subjected to greater forces move in the direction of the forces, causing the bearing outer ring 1032 to flip, thereby driving the printing platform 8 to move a certain distance in the vertical direction z, until the forces on various parts of the bearing outer ring 1032 are balanced or the flipping angle reaches a limit, the flipping stops, and the printing platform 8 also stops moving, thereby achieving the purpose of automatic fine-tuning.

[0043] When the printing platform 8 is subjected to external force, as shown in Figure 15, when the print head 7 contacts the printing platform 8, the downward pressure impact force of the print head 7 is transmitted to the platform connector 105 through the printing platform 8, so that the local force on the connector to be leveled is greater, that is, the local force on the bearing outer ring 1032 is greater, so that the part of the bearing outer ring 1032 that is subjected to greater force moves in the direction of the force, thereby causing it to flip. In this way, the impact force can be buffered and absorbed to avoid vibration of the printing platform 8.

[0044] In some embodiments, as shown in Figures 3, 4, 5, 7 and 8, the adjustment mechanism 1 also includes a fastening nut 106; the first end of the connecting rod 101 is provided with a first screw head 1011, and the second end passes through the bearing inner ring 1031 and is connected to the lifting adjustment mechanism 2; the part of the connecting rod 101 located below the bearing inner ring 1031 is provided with a first threaded section 1012, and the first threaded section 1012 is threadedly connected to the fastening nut 106 to fix the bearing inner ring 1031 between the first screw head 1011 and the fastening nut 106.

[0045] The first end of the connecting rod 101 is any end of the connecting rod 101 , and the second end is the end opposite to the first end. The diameter of the first screw head 1011 may be less than or equal to the diameter of the bearing inner ring 1031 .

[0046] The bearing inner ring 1031 is fixed between the first screw head 1011 and the fastening nut 106 through the cooperation between the fastening nut 106 and the first threaded section 1012. This can not only conveniently and quickly achieve the fixation of the bearing inner ring 1031 and the connecting rod 101, but also facilitate the quick disassembly of the bearing inner ring 1031 and the connecting rod 101, thereby realizing a detachable connection between the bearing inner ring 1031 and the connecting rod 101, and further facilitating the replacement of the radial spherical bearing 103 or the connecting rod 101.

[0047] In some embodiments, as shown in Figures 3 and 12, the adjustment mechanism 1 includes at least one fastening bolt 102; the radial spherical bearing 103 is embedded in the platform connector 105, and the upper surface of the platform connector 105 is provided with screw holes 104 corresponding to the fastening bolts 102, and the screw holes 104 are arranged around the radial spherical bearing 103; each fastening bolt 102 is threadedly connected to the hole wall of the corresponding screw hole 104, and the second screw head 1021 of each fastening bolt 102 is partially pressed on the bearing outer ring 1032; an opening is provided on the platform connector 105 corresponding to the bearing inner ring 1031, and the second end of the connecting rod 101 passes through the opening.

[0048] The second screw head 1021 on the fastening bolt 102 presses against the bearing outer ring 1032, thereby preventing the radial spherical plain bearing 103 from falling out of the connecting component 105 to be leveled. The structure is simple and easy to manufacture; it also conveniently and quickly secures the bearing outer ring 1032 to the platform connecting component 105. The number of fastening bolts 102 can be set by the staff according to actual conditions and is not strictly limited in this embodiment.

[0049] The opening on the platform connector 105 corresponding to the bearing inner ring 1031 enables the bearing outer ring 1032 to smoothly flip relative to the bearing inner ring 1031, and also enables the second end of the connecting rod 101 to pass through the platform connector 105 to be connected to the transmission of the lifting and adjusting mechanism below.

[0050] In some embodiments, as shown in Figures 3 and 15, the platform connector 105 includes a platform connecting segment 1051, a bearing connecting segment 1052, and a strain region 1053 between the platform connecting segment 1051 and the bearing connecting segment 1052, wherein the thickness of the strain region 1053 is less than the thickness of the platform connecting segment 1051 and / or the bearing connecting segment 1052.

[0051] The platform connecting section 1051 is used to connect to the printing platform 8; the bearing connecting section 1052 is used to connect to the radial spherical bearing 103; the strain area 1053 is located between the platform connecting section 1051 and the bearing connecting section 1052 to connect the platform connecting section 1051 and the bearing connecting section 1052. This can eliminate other connecting components, thereby simplifying the overall structure of the platform connecting member 105, making the structure of the platform connecting member 105 more compact, and reducing the production cost.

[0052] The thickness of the strain area 1053 is smaller than the thickness of the platform connecting section 1051 and / or the bearing connecting section 1052, so that the strain area 1053 can produce more obvious strain when subjected to external force, that is, it can produce a larger deformation, so that when the downward pressure generated by the print head 7 on the printing platform 8 is transmitted to the strain area 1053, the strain area 1053 can produce obvious strain.

[0053] As shown in FIG3 and FIG15 , the detection component 6 is fixed on the strain area of ​​the platform connector 105 ; the detection component 6 includes a mechanical sensor, which is bonded to the strain area of ​​the platform connector 105 .

[0054] The mechanical sensor can be a strain gauge sensor, a piezoelectric ceramic sensor, etc.

[0055] It is understood that the detection component 6 can also be another type of sensor, such as a capacitive sensor, a resistive sensor, or a visual sensor, capable of detecting when the print head 7 contacts the printing platform 8 and issuing a leveling signal. For example, a capacitive sensor can change the capacitance, a resistive sensor can change the resistance, and a visual sensor can visually detect whether the print head 7 contacts the printing platform 8. It is understood that the detection component 6 is not limited to the aforementioned sensors and can also include optical sensors such as lidar.

[0056] The strain zone of the leveling connector is the area on the leveling connector that is more susceptible to strain when subjected to external forces than other areas. This allows for more accurate detection by the detection component 6. When the print head 7 contacts the printing platform 8 and generates downward pressure, the strain zone of the platform connector 105 generates significant strain, allowing the detection component 6 to promptly and accurately detect this strain, thereby further improving the accuracy of the detection results.

[0057] Strain gauge sensors offer the advantages of high detection accuracy, minimal error, and light weight. Bonding the strain gauge directly to the strain area of ​​the leveling connector not only further improves the accuracy of the strain gauge detection but also eliminates the need for additional connecting structures, resulting in a simpler and more compact structure.

[0058] As shown in FIG. 2 and FIG. 3 , a heat insulating portion 5 is further provided between the platform connector 105 and the printing platform 8 .

[0059] In some implementations, the printing platform 8 generates heat during operation, such as the hot bed 801 of the printing platform 8, and the heat insulation portion 5 can serve to isolate heat transfer, thereby preventing the heat generated by the printing platform 8 from being transferred to the leveling portion connector, thereby preventing the heat generated by the printing platform 8 from being transferred to the leveling mechanism, thereby avoiding the situation where the leveling mechanism is aged due to excessive temperature and affects its service life.

[0060] In some embodiments, as shown in Figures 3 and 9 to 11, the lifting and adjusting mechanism 2 includes a driving assembly 201 and a transmission assembly 202. The driving assembly 201 includes a driving part 2011 and a bevel gear driving wheel 2012 connected to the driving part 2011. The transmission assembly 202 includes a bevel gear driven wheel 2021 engaged with the bevel gear driving wheel 2012; the rotating shaft 20211 of the bevel gear driven wheel 2021 is provided with a through hole 20212, the inner wall of the through hole 20212 is provided with a second threaded segment 20213, the connecting rod 101 is provided with a third threaded segment 1013, the second end of the connecting rod 101 extends into the through hole 20212, and the bevel gear driven wheel 2021 is threadedly connected to the connecting rod 101 through the second threaded segment 20213 and the third threaded segment 1013; in the circumferential direction of the connecting rod 101, the connecting rod 101 is fixed relative to the bevel gear driven wheel 2021.

[0061] The driving unit 2011 may be a motor, or other components capable of providing power, which is not strictly limited in this embodiment.

[0062] In a specific application, the third thread segment 1013 is provided at a portion of the connecting rod 101 close to the second end, thereby facilitating threaded connection between the third thread segment 1013 and the second thread segment 20213 of the bevel gear driving wheel 2012 .

[0063] The rotation of the driving portion 2011 drives the bevel gear driving wheel 2012 to rotate, which in turn drives the meshing bevel gear driven wheel 2021 to rotate. This causes the second threaded segment 20213 of the bevel gear driven wheel 2021 to rotate relative to the third threaded segment 1013, ultimately causing the connecting rod 101 to move upward or downward along the z-axis, thereby driving the platform connector 105 on the connecting rod 101 to move upward or downward along the z-axis, and in turn driving the printing platform 8 to move upward or downward along the z-axis. In the circumferential direction of the connecting rod 101, the connecting rod 101 is fixed relative to the bevel gear driven wheel 2021, thereby preventing the connecting rod 101 from moving relative to the bevel gear driven wheel in a direction perpendicular to the z-axis.

[0064] Among them, whether the connecting rod 101 moves upward or downward along the z-axis direction depends on the rotation direction of the driving part 2011 and the thread direction of the second thread segment 20213 and the third thread segment 1013. That is to say, if the connecting rod 101 is allowed to move upward along the z-axis direction, it is necessary to determine the corresponding rotation direction of the driving part 2011 according to the thread direction of the second thread segment 20213 and the third thread segment 1013, and control the driving part 2011 to rotate in this direction. If the connecting rod 101 is allowed to move downward along the z-axis direction, it is necessary to determine the corresponding rotation direction of the driving part 2011 according to the thread direction of the second thread segment 20213 and the third thread segment 1013, and control the driving part 2011 to rotate in this direction. The thread direction of the segment 1013 determines the corresponding rotation direction of the driving part 2011, and controls the driving part 2011 to rotate in this direction. The staff can pre-determine the rotation direction of the driving part 2011 corresponding to the upward movement of the connecting rod 101 along the z-axis direction, and the rotation direction of the driving part 2011 corresponding to the downward movement of the connecting rod 101 along the z-axis direction according to the thread direction of the second thread segment 20213 and the third thread segment 1013, so as to facilitate the corresponding control of the driving part 2011 so that the connecting rod 101 can move in the direction required for leveling.

[0065] It adopts bevel gear meshing mode for transmission, and has the advantages of high load-bearing capacity, smooth transmission, reliable operation, compact structure, space saving, wear resistance, long service life and low noise.

[0066] Through the cooperation between the second thread segment 20213 and the third thread segment 1013, precise control of the lifting and lowering movement of the connecting rod 101 can be achieved, thereby improving the accuracy of leveling.

[0067] In some embodiments, as shown in Figures 4 to 8, a limiting plane 1014 is provided on the side wall of the third threaded segment 1013 on the connecting rod 101, such that the cross-section can be formed into a D shape, thereby reducing the area of ​​the third threaded segment 1013, thereby avoiding the situation where the connecting rod 101 rotates together when the bevel gear driving wheel 2012 rotates relative to the connecting rod 101, that is, the connecting rod 101 rotates on its own and the connecting rod 101 cannot be raised or lowered, thereby improving the reliability of the transmission.

[0068] Optionally, as shown in Figures 3, 13 and 14, the transmission assembly 202 includes an axial load bearing assembly 203 provided on the bevel gear driven wheel 2021, and the axial load bearing assembly 203 is used to bear the axial load of the bevel gear driven wheel 2021; the axial load bearing assembly 203 includes a first thrust ball bearing 2032, a second thrust ball bearing 2033, a first connecting plate 2031, a second connecting plate 2034 and a first fastener 2035; the first thrust ball bearing 2032 and the second thrust ball bearing 2033 each include a seat ring 20331 and a shaft ring 20332 rotatably connected to the seat ring 20331; the seat ring 20331 of the first thrust ball bearing 2032 It is fixedly connected to the first connecting plate 2031, and the shaft ring 20332 of the first thrust ball bearing 2032 is fixedly connected to the lower part of the rotating shaft 20211 of the bevel gear driven wheel 2021; the seat ring 20331 of the second thrust ball bearing 2033 is fixedly connected to the second connecting plate 2034, and the shaft ring 20332 of the second thrust ball bearing 2033 is fixedly connected to the upper part of the rotating shaft 20211 of the bevel gear driven wheel 2021; the first connecting plate 2031 is connected to the second connecting plate 2034 through the first fastener 2035.

[0069] The shaft ring 20332 of the first thrust ball bearing 2032 and the shaft ring 20332 of the second thrust ball bearing 2033 can rotate together with the bevel gear driven wheel 2021, thereby not interfering with the rotation of the bevel gear driven wheel 2021, ensuring that the bevel gear driven wheel 2021 can rotate smoothly.

[0070] The first thrust ball bearing 2032 and the second thrust ball bearing 2033 can be used to bear the axial load of the bevel gear driven wheel 2021, so that the bevel gear driven wheel 2021 can rotate smoothly without jamming, and the service life of the bevel gear driven wheel 2021 can be increased.

[0071] The first fastener 2035 may be a bolt, a rivet or other connecting member. This embodiment does not impose a strict limitation on the first fastener 2035 .

[0072] As shown in FIG3 , the second connecting plate 2034 is further provided with a notch for avoiding the bevel gear driving wheel 2012 , so as not to interfere with the rotation of the bevel gear driven wheel 2021 and ensure that the bevel gear driven wheel 2021 can rotate smoothly.

[0073] As shown in FIG3 , the driving part 2011 is mounted on the first connecting plate 2031 ; an elastic component 3 is further provided between the second connecting plate 2034 and the platform connector 105 , and the elastic component 3 is a spring.

[0074] The driving part 2011 is directly mounted on the first connecting plate 2031 , thereby eliminating other additional connecting structures and making the structure simpler and more compact.

[0075] The elastic component 3 can fill the gap between the second connecting plate 2034 and the platform connector 105 to avoid shaking during the leveling process, and can also play a role in buffering and shock absorption.

[0076] It can be seen from the above embodiments that there will be no gaps and shaking back and forth or left and right during the adjustment process of the entire leveling device, the mechanical vibration is small, and it is very stable before and after adjustment, effectively ensuring the accuracy of leveling. When it is used in a three-dimensional molding machine, the first layer of the printed model can be well adhered to the printing platform 8, laying the foundation for the successful printing of the model, and solving the problems of cumbersome and difficult leveling operations by users and difficult model adhesion.

[0077] In some embodiments, as shown in Figures 3, 4, 6 and 16, the second connecting plate 2034 is further provided with a through hole 20341, and the through hole 20341 is adapted to the cross-section of the portion of the connecting rod 101 provided with the limiting plane 1014; the portion of the connecting rod 101 provided with the limiting plane 1014 passes through the through hole 20341.

[0078] In a specific application, the cross section of the portion of the connecting rod 101 where the limiting plane 1014 is provided is D-shaped, and the through hole 20341 is also D-shaped, so that the connecting rod 101 cannot rotate and can only move up and down.

[0079] The embodiment of the present invention provides a leveling device, which is applied to a 3D molding machine, and includes an adjustment mechanism 1, a lifting adjustment mechanism 2, and a detection component 6; the lifting adjustment mechanism 2 is connected to a printing platform 8 of the 3D molding machine through the adjustment mechanism 1;

[0080] Among them, the detection component 6 is used to detect that the print head 7 of the three-dimensional molding machine contacts the printing platform 8 to send a leveling signal; the lifting and adjusting mechanism 2 is used to control the lifting and lowering movement of the printing platform 8 through the adjustment mechanism 1 according to the leveling signal; the adjustment mechanism 1 is used to adjust the angle of the printing platform 8 relative to the lifting and adjusting mechanism 2.

[0081] Among them, the adjustment mechanism 1 is located above the lifting adjustment mechanism 2;

[0082] The adjustment mechanism 1 includes a radial spherical bearing 103, a platform connector 105 and a connecting rod 101;

[0083] The radial spherical plain bearing 103 includes an inner ring 1031 and an outer ring 1032. The inner ring 1031 has an outer spherical surface, and the outer ring 1032 has an inner spherical surface. The inner spherical surface of the outer ring 1032 is slidably connected to the outer spherical surface of the inner ring 1031, and the outer ring 1032 can rotate around the inner ring 1031.

[0084] The bearing inner ring 1031 is fixedly connected to the connecting rod 101 , the bearing outer ring 1032 is fixedly connected to the platform connecting piece 105 , the connecting rod 101 is connected to the lifting adjustment mechanism 2 , and the platform connecting piece 105 is used to connect to the printing platform 8 .

[0085] The adjustment mechanism 1 further includes a fastening nut 106; a first screw head 1011 is provided at the first end of the connecting rod 101, and a second end passes through the bearing inner ring 1031 and is connected to the lifting adjustment mechanism 2;

[0086] A first threaded section 1012 is provided on the portion of the connecting rod 101 below the bearing inner ring 1031 . The first threaded section 1012 is threadedly connected to the fastening nut 106 to fix the bearing inner ring 1031 between the first screw head 1011 and the fastening nut 106 .

[0087] Wherein, the adjustment mechanism 1 includes at least one fastening bolt 102;

[0088] The radial spherical plain bearing 103 is embedded in the platform connector 105. The upper surface of the platform connector 105 is provided with screw holes 104 corresponding to the fastening bolts 102. The screw holes 104 are arranged around the radial spherical plain bearing 103.

[0089] Each fastening bolt 102 is threadedly connected to the hole wall of the corresponding screw hole 104, and the second screw head 1021 of each fastening bolt 102 is partially pressed on the bearing outer ring 1032; an opening is provided on the platform connector 105 corresponding to the bearing inner ring 1031, and the second end of the connecting rod 101 passes through the opening.

[0090] The platform connector 105 includes a platform connecting section 1051, a bearing connecting section 1052, and a strain region between the platform connecting section 1051 and the bearing connecting section 1052. The thickness of the strain region 1053 is smaller than the thickness of the platform connecting section 1051 and / or the bearing connecting section 1052.

[0091] The detection component 6 is fixed on the strain area of ​​the platform connector 105; the detection component 6 includes a mechanical sensor, which is bonded to the strain area of ​​the platform connector 105; or the detection component 6 includes a capacitive sensor, a resistive sensor, or a visual sensor;

[0092] A heat insulating portion 5 is further provided between the platform connector 105 and the printing platform.

[0093] The lifting and adjusting mechanism 2 includes a driving component 201 and a transmission component 202;

[0094] The adjustment mechanism 1 includes a connecting rod 101;

[0095] The driving assembly 201 includes a driving portion 2011 and a bevel gear driving wheel 2012 connected to the driving portion 2011, and the transmission assembly 202 includes a bevel gear driven wheel 2021 meshing with the bevel gear driving wheel 2012;

[0096] A through hole 20212 is formed in the rotating shaft 20211 of the bevel gear driven wheel 2021. A second threaded section 20213 is formed on the inner wall of the through hole 20212. A third threaded section 1013 is formed on the connecting rod 101. The second end of the connecting rod 101 extends into the through hole 20212. The bevel gear driven wheel 2021 is threadedly connected to the connecting rod 101 via the second threaded section 20213 and the third threaded section 1013.

[0097] In the circumferential direction of the connecting rod 101 , the connecting rod 101 is fixed relative to the bevel gear driven wheel 2021 .

[0098] The transmission assembly 202 includes an axial load bearing assembly 203 provided on the bevel gear driven wheel 2021 , and the axial load bearing assembly 203 is used to bear the axial load of the bevel gear driven wheel 2021 ;

[0099] The axial load bearing assembly 203 includes a first thrust ball bearing 2032, a second thrust ball bearing 2033, a first connecting plate 2031, a second connecting plate 2034, and a first fastener 2035. The first thrust ball bearing 2032 and the second thrust ball bearing 2033 each include a seat ring 20331 and a shaft ring 20332 rotatably connected to the seat ring 20331. The seat ring 20331 of the first thrust ball bearing 2032 is fixedly connected to the first connecting plate 2031. The shaft ring 20332 of the first thrust ball bearing 2032 is fixedly connected to the lower portion of the rotating shaft 20211 of the bevel gear driven gear 2021; the seat ring 20331 of the second thrust ball bearing 2033 is fixedly connected to the second connecting plate 2034, and the shaft ring 20332 of the second thrust ball bearing 2033 is fixedly connected to the upper portion of the rotating shaft 20211 of the bevel gear driven gear 2021; the first connecting plate 2031 is connected to the second connecting plate 2034 via a first fastener 2035;

[0100] The second connecting plate 2034 is also provided with a notch for avoiding the bevel gear driving wheel 2012;

[0101] The driving part 2011 is installed on the first connecting plate 2031 ; an elastic component 3 is further provided between the second connecting plate 2034 and the platform connector 105 , and the elastic component 3 is a spring.

[0102] The second connecting plate 2034 is further provided with a through hole 20341, and the through hole 20341 is adapted to the cross section of the portion of the connecting rod 101 provided with the limiting plane 1014;

[0103] The portion of the connecting rod 101 provided with the limiting plane 1014 passes through the through-hole 20341 .

[0104] In a third aspect, an embodiment of the present invention provides a three-dimensional molding machine, comprising a print head 7, a printing platform 8 and the above-mentioned leveling device, wherein the leveling device is arranged at the lower part of the printing platform 8, and the print head 7 is located above the printing platform 8.

[0105] In specific applications, the print head 7 can move in the x-axis, y-axis and z-axis directions to achieve the purpose of flexible movement of the print head 7, wherein the x-axis and y-axis are two directions perpendicular to each other on the horizontal plane, and the z-axis is a direction perpendicular to the horizontal plane, that is, the vertical direction.

[0106] Specifically, the printing platform 8 includes a hot bed 801, a bracket 802 and a second fastener 4; the hot bed 801 includes a heating part 8014, a substrate 8013, an adsorbent 8012 and a flexible plate 8011; the flexible plate 8011 is adsorbed on the upper surface of the substrate 8013 through the adsorbent 8012, and the heating part 8014 is arranged on the lower surface of the substrate 8013; the substrate 8013 is connected to the platform connector 105 of the adjustment mechanism 1 through the insulation part 5; the bracket 802 is connected to the first connecting plate 2031 through the second fastener 4; the adsorbent 8012 is a magnetic sticker, the flexible plate 8011 is an elastic metal plate, the substrate 8013 is a metal substrate 8013, and the heating part 8014 is a heating film.

[0107] The second fastener 4 can be a connecting piece such as a bolt or a rivet. This embodiment does not impose a strict limit on the first fastener 2035 .

[0108] A heating unit 8014 disposed below the substrate 8013 generates heat, thereby heating the heated bed 801. The heat generated by the heating unit 8014 is quickly transferred to the flexible board 8011 via the substrate 8013, thereby preventing warping during the 3D model printing process. Furthermore, the flexible board 8011 is attached to the upper surface of the substrate 8013 via the adsorption unit 8012, enabling rapid assembly of the flexible board 8011 and the substrate 8013.

[0109] Flexible board 8011 is a thin sheet made of metal, such as steel or iron. It exhibits elastic deformation properties, meaning it bends when subjected to external forces and returns to its original shape when the force is removed. When flexible board 8011 is placed on substrate 8013, the elastic metal sheet adheres to the upper surface of the metal substrate 8013 under the attraction of the magnetic sticker.

[0110] The heating film can be bonded to the lower surface of the substrate 8013 through the insulating heating layer, so that the connection between the heating film and the substrate 8013 is more stable, and the insulating adhesive layer also plays an insulating role, so that the heating film can work normally.

[0111] It should be noted that the printing platform involved in this embodiment can adopt the leveling device of the above embodiment. The specific implementation and working principle of the leveling device can refer to the corresponding content in the above embodiment, which will not be repeated here.

[0112] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, those skilled in the art will appreciate that the present invention is not limited to the above embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leveling device, applied to a stereoscopic forming machine, characterized in that: It comprises an adjustment mechanism (1), a lifting adjustment mechanism (2) and a detection component (6); the lifting adjustment mechanism (2) is connected to a printing platform (8) of the three-dimensional molding machine through the adjustment mechanism (1); The detection component (6) is used to detect that the print head (7) of the three-dimensional molding machine contacts the printing platform (8) to send a leveling signal; the lifting and adjusting mechanism (2) is used to control the lifting and lowering movement of the printing platform (8) through the adjusting mechanism (1) according to the leveling signal; and the adjusting mechanism (1) is used to adjust the angle of the printing platform (8) relative to the lifting and adjusting mechanism (2).

2. The leveling device according to claim 1, characterized in that: The adjustment mechanism (1) is located above the lifting and lowering adjustment mechanism (2); The adjustment mechanism (1) comprises a radial spherical bearing (103), a platform connecting member (105) and a connecting rod (101); The radial spherical bearing (103) comprises a bearing inner ring (1031) and a bearing outer ring (1032), the bearing inner ring (1031) is provided with an outer spherical surface, the bearing outer ring (1032) is provided with an inner spherical surface, the inner spherical surface of the bearing outer ring (1032) is slidably connected to the outer spherical surface of the bearing inner ring (1031), and the bearing outer ring (1032) can be turned around the bearing inner ring (1031); The inner ring of the bearing (1031) is fixedly connected to the connecting rod (101), the outer ring of the bearing (1032) is fixedly connected to the platform connecting member (105), the connecting rod (101) is connected to the lifting and adjusting mechanism (2), and the platform connecting member (105) is used to connect to the printing platform (8).

3. The leveling device according to claim 2, characterized in that: The adjustment mechanism (1) further comprises a fastening nut (106); a first end of the connecting rod (101) is provided with a first screw head (1011), and a second end passes through the bearing inner ring (1031) and is connected to the lifting and lowering adjustment mechanism (2); A first threaded section (1012) is provided on the portion of the connecting rod (101) located below the bearing inner ring (1031), and the first threaded section (1012) is threadedly connected to the fastening nut (106) to fix the bearing inner ring (1031) between the first screw head (1011) and the fastening nut (106).

4. The leveling device according to claim 3, characterized in that: The adjustment mechanism (1) comprises at least one fastening bolt (102); The radial spherical bearing (103) is embedded in the platform connecting member (105), and the upper surface of the platform connecting member (105) is provided with a screw hole (104) corresponding to the fastening bolt (102), and the screw hole (104) is arranged around the radial spherical bearing (103); Each of the fastening bolts (102) is threadedly connected to the hole wall of the corresponding screw hole (104), and the second screw head (1021) of each of the fastening bolts (102) is partially pressed on the bearing outer ring (1032); an opening is provided on the platform connecting member (105) at a portion corresponding to the bearing inner ring (1031), and the second end of the connecting rod (101) passes through the opening.

5. The leveling device according to claim 2, characterized in that: The platform connecting member (105) comprises a platform connecting section (1051), a bearing connecting section (1052), and a strain region (1053) between the platform connecting section (1051) and the bearing connecting section (1052), wherein the thickness of the strain region (1053) is smaller than the thickness of the platform connecting section (1051) and / or the bearing connecting section (1052); The detection component (6) is fixed on the strain area (1053) of the platform connecting member (105); The component (6) includes a mechanical sensor, and the mechanical sensor is bonded to the strain area of ​​the platform connector (105); or the detection component (6) includes a capacitive sensor, a resistive sensor, or a visual sensor; A heat insulating portion (5) is also provided between the platform connecting member (105) and the printing platform (8).

6. The leveling device according to claim 1, characterized in that: The lifting and adjusting mechanism (2) comprises a driving component (201) and a transmission component (202); The adjustment mechanism (1) comprises a connecting rod (101); The driving assembly (201) comprises a driving part (2011) and a bevel gear driving wheel (2012) connected to the driving part (2011); the transmission assembly (202) comprises a bevel gear driven wheel (2021) meshing with the bevel gear driving wheel (2012); The rotating shaft (20211) of the bevel gear driven wheel (2021) is provided with a through hole (20212), the inner wall of the through hole (20212) is provided with a second threaded section (20213), the connecting rod (101) is provided with a third threaded section (1013), the second end of the connecting rod (101) extends into the through hole (20212), and the bevel gear driven wheel (2021) is threadedly connected to the connecting rod (101) via the second threaded section (20213) and the third threaded section (1013); In the circumferential direction of the connecting rod (101), the connecting rod (101) is fixed relative to the bevel gear driven wheel (2021).

7. The leveling device according to claim 6, characterized in that: A limiting plane (1014) is provided on the side wall of the third threaded section (1013) on the connecting rod (101); The transmission assembly (202) comprises an axial load bearing assembly (203) arranged on the bevel gear driven wheel (2021), and the axial load bearing assembly (203) is used to bear the axial load of the bevel gear driven wheel (2021); The axial load bearing assembly (203) comprises a first thrust ball bearing (2032), a second thrust ball bearing (2033), a first connecting plate (2031), a second connecting plate (2034) and a first fastener (2035); the first thrust ball bearing (2032) and the second thrust ball bearing (2033) both comprise a seat ring (20331) and a shaft ring (20332) rotatably connected to the seat ring (20331); The seat ring (20331) of the first thrust ball bearing (2032) is fixedly connected to the first connecting plate (2031), and the shaft ring (20332) of the first thrust ball bearing (2032) is fixedly connected to the lower part of the rotating shaft (20211) of the bevel gear driven wheel (2021); The seat ring (20331) of the second thrust ball bearing (2033) is fixedly connected to the second connecting plate (2034), and the shaft ring (20332) of the second thrust ball bearing (2033) is fixedly connected to the upper part of the rotating shaft (20211) of the bevel gear driven wheel (2021); the first connecting plate (2031) is connected to the second connecting plate (2034) via the first fastener (2035); The second connecting plate (2034) is also provided with a notch for avoiding the bevel gear driving wheel (2012); The driving part (2011) is mounted on the first connecting plate (2031); an elastic component (3) is also provided between the second connecting plate (2034) and the platform connecting member (105), and the elastic component (3) is a spring.

8. The leveling device according to claim 7, characterized in that: The second connecting plate (2034) is also provided with a through hole (20341), and the through hole (20341) is adapted to the cross section of the portion of the connecting rod (101) provided with the limiting plane (1014); The portion of the connecting rod (101) provided with the limiting plane (1014) passes through the through hole (20341).

9. A three-dimensional forming machine, characterized in that: It comprises a print head (7), a printing platform and a leveling device as claimed in any one of claims 1 to 8, wherein the leveling device is arranged at the lower part of the printing platform (8), and the print head (7) is located above the printing platform (8).

10. The three-dimensional forming machine according to claim 9, characterized in that: The printing platform (8) comprises a heat bed (801), a bracket (802) and a second fastener (4); the heat bed (801) comprises a heating portion (8014), a substrate (8013), an adsorbent (8012) and a flexible plate (8011); the flexible plate (8011) is adsorbed on the upper surface of the substrate (8013) through the adsorbent (8012), and the heating portion (8014) is arranged on the lower surface of the substrate (8013); The base plate (8013) is connected to the platform connector (105) of the adjustment mechanism (1) via the second fastener (4); the bracket (802) is connected to the first connecting plate (2031) via the heat insulation portion (5); The adsorption component (8012) is a magnetic sticker, the flexible plate (8011) is an elastic metal plate, the substrate (8013) is a metal substrate (8013), and the heating part (8014) is a heating film.

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