A printing platform of a 3D printer and a 3D printer

Abstract

The utility model discloses a kind of printing platform of 3D printer and 3D printer, and printing platform includes bearing seat, hot bed and magnetic attraction panel, bearing seat four around respectively symmetrically is equipped with first mounting hole, first installation hole can be rotatably equipped with leveling cylinder, the bottom of leveling cylinder is equipped with turbine, the four around of hot bed is equipped with the lift bar corresponding with leveling cylinder, leveling cylinder is connected with lift bar by screw thread, the bottom of bearing seat can rotatably be equipped with four parallel arrangement worm, four worm are respectively engaged with corresponding turbine, and one end of four worm all extends to the front of bearing seat, and worm is coaxially connected with adjusting wheel at the front of bearing seat one end, magnetic attraction panel is located at the top surface of hot bed.The utility model extends to the front of bearing seat by one end of worm, when leveling, operator does not need to bend or laboriously hand into equipment bottom or narrow space to carry out leveling operation, significantly reduce the difficulty and tediousness of leveling operation, improve leveling work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of 3D printer technology, specifically to a 3D printer printing platform and a 3D printer. Background Technology

[0002] 3D printing, also known as additive manufacturing, is a rapid prototyping technology that uses digital model files as a basis and employs bondable materials such as powdered metal, plastic, or semi-fluid slurry to construct objects layer by layer. 3D printing has advantages such as not being limited by the difficulties or impossibilities of traditional processing methods and significantly shortening the processing cycle of finished products with complex structures, leading to its increasingly widespread use in recent years. Before using 3D printing technology to print architectural models (i.e., architectural sand tables), leveling the printing platform used to support the model is crucial. If the printing platform is not leveled, it may lead to uneven adhesion between the model and the printing platform during printing, or even warping or misalignment between layers in the printed product. Current leveling methods mainly involve the operator bending over, reaching into the bottom or top of the printing platform with one hand to rotate the leveling nut, and using the other hand to hold a feeler gauge or A4 paper between the printer nozzle and the printing platform to judge the distance between them. However, because 3D printers suitable for printing architectural models are relatively large, and because the equipment is usually designed with an enclosed structure to improve print quality, it is inconvenient for the operator to reach into the bottom of the printing platform or narrow spaces, affecting the efficiency of the leveling work. Summary of the Invention

[0003] The main purpose of this utility model is to overcome the defects of the above-mentioned background technology and provide a printing platform and 3D printer for a 3D printer.

[0004] To achieve the above objectives, the present invention proposes a 3D printer printing platform comprising a support, a heated bed, and a magnetic panel. The support has symmetrically arranged first mounting holes around its perimeter. A leveling cylinder is rotatably mounted within each mounting hole. A turbine is located at the bottom of the leveling cylinder. The heated bed has lifting rods corresponding to the leveling cylinder around its perimeter. The leveling cylinder and the lifting rods are connected by threads. Four parallel worm gears are rotatably mounted at the bottom of the support. Each of the four worm gears meshes with a corresponding turbine, and one end of each worm gear extends to the front of the support. An adjusting wheel is coaxially connected to the front end of each worm gear. The magnetic panel is located on the top surface of the heated bed.

[0005] To further optimize the technical solution, the heated bed is provided with a second mounting hole around its perimeter, the top of the lifting rod is provided with a limiting cap, the upper part of the lifting rod is movably inserted into the second mounting hole, the lower part of the lifting rod is threadedly connected to the leveling cylinder, the inner wall of the second mounting hole is provided with a keyway, the outer periphery of the lifting rod is provided with a flat key corresponding to the keyway, and a spring is sleeved on the outer periphery of the lifting rod, one end of the spring abuts against the bottom surface of the heated bed, and the other end of the spring abuts against the top surface of the bearing seat.

[0006] To further optimize the technical solution, the upper end of the second mounting hole is provided with a concave stepped surface, so that the second mounting hole has a countersunk hole structure, and the limiting cap is embedded in the stepped surface.

[0007] To further optimize the technical solution, the inner wall of the leveling cylinder is provided with an internal thread structure, and the lower part of the lifting rod is provided with an external thread structure that mates with and connects to the internal thread structure.

[0008] The adjusting wheel is fitted with a graduated ring.

[0009] This utility model also proposes a 3D printer, including the above-mentioned printing platform, base and printing nozzle module. The base is equipped with an X-axis component, a Y-axis component and a Z-axis component. The printing platform is mounted on the Y-axis component, the printing nozzle module is mounted on the X-axis component and the X-axis component is mounted on the Z-axis component.

[0010] To further optimize the technical solution, the Y-axis assembly includes a Y-axis guide rail, a Y-axis lead screw, and a Y-axis drive motor. A Y-axis lead screw nut pair that slidably connects to the Y-axis lead screw is provided on the Y-axis guide rail. The Y-axis drive motor is connected to the Y-axis lead screw, and the Y-axis lead screw nut pair is connected to the support of the printing platform.

[0011] The technical solution is further optimized. The X-axis assembly includes an X-axis guide rail, an X-axis lead screw, and an X-axis drive motor. The printhead module is slidably mounted on the X-axis guide rail via an X-axis lead screw nut pair, and the X-axis drive motor is connected to the X-axis lead screw.

[0012] To further optimize the technical solution, the Z-axis assembly includes a Z-axis guide rail, a Z-axis lead screw, and a Z-axis drive motor. The Z-axis guide rail is vertically fixed on both sides of the base in the form of a gantry structure. The two ends of the X-axis guide rail are slidably connected to the Z-axis guide rail. The Z-axis lead screw is connected to the X-axis guide rail through a Z-axis lead screw nut pair. The Z-axis drive motor is connected to the Z-axis lead screw.

[0013] To further optimize the technical solution, a protective cover is provided on the base. The printing platform, the print head module, the X-axis assembly, the Y-axis assembly, and the Z-axis assembly are all located inside the protective cover. An entrance and exit are provided on the front of the protective cover, and a closed door is provided at the entrance and exit. A transparent viewing window is provided on the closed door and / or the side wall of the protective cover.

[0014] The beneficial effects of this utility model include: rotating the adjusting wheel drives the corresponding worm gear to rotate, the worm gear drives the turbine and leveling cylinder to rotate synchronously, and the rotation of the leveling cylinder drives the lifting rod to rise and fall, which in turn drives the corresponding end of the heated bed to rise and fall on the support seat, thereby adjusting the levelness of the heated bed; since one end of each worm gear extends to the front of the support seat, the operator does not need to bend over or laboriously reach into the bottom of the equipment or narrow spaces to perform the leveling operation, which significantly reduces the difficulty and tediousness of the leveling operation and improves the efficiency of the leveling work. Moreover, all the adjusting wheels are concentrated in front of the support seat, which makes it easy for the operator to observe and compare the position status of multiple leveling points at the same time; the turbine and worm gear transmission has a self-locking characteristic, and after the height is adjusted, it is not easy to rotate or shift on its own under the vibration generated during the printing process, thus improving stability. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the printing platform in an embodiment of this utility model.

[0016] Figure 2 This is an exploded view of the printing platform installation in an embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the lifting rod in an embodiment of this utility model.

[0018] Figure 4 This is a partial enlarged view of the second mounting hole in an embodiment of this utility model.

[0019] Figure 5 This is an overall schematic diagram of the 3D printer in an embodiment of this utility model.

[0020] Figure 6 This is a schematic diagram of the 3D printer after the protective cover has been removed in an embodiment of this utility model.

[0021] Figure 7 This is a schematic diagram of the printing platform installed on the Y-axis assembly in an embodiment of this utility model.

[0022] Figure 8 This is a schematic diagram of the installation of the X-axis assembly and Z-axis assembly in an embodiment of this utility model.

[0023] Figure reference numerals: 1 Printing platform; 101 Support seat; 102 Heated bed; 103 Magnetic panel; 104 First mounting hole; 105 Leveling cylinder; 106 Turbine; 107 Lifting rod; 108 Worm gear; 109 Adjusting wheel; 110 Second mounting hole; 111 Limit cap; 112 Keyway; 113 Flat key; 114 Spring; 115 Stepped surface; 116 Scale ring; 2 Base; 3 Printing nozzle module; 4 X-axis assembly; 401 X-axis guide rail; 402 X-axis lead screw; 403 X-axis drive motor; 404 X-axis lead screw and nut pair; 5 Y-axis assembly; 501 Y-axis guide rail; 502 Y-axis lead screw; 503 Y-axis drive motor; 504 Y-axis lead screw and nut pair; 6 Z-axis assembly; 601 Z-axis guide rail; 602 Z-axis lead screw; 603 Z-axis drive motor; 604 Z-axis lead screw and nut pair; 7 Protective cover; 701 Entrance / exit; 702 Enclosed door. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0026] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Example 1

[0028] Please see Figures 1 to 4 In one embodiment, the printing platform 1 of the 3D printer includes a carrier 101, a heated bed 102, and a magnetic panel 103. First mounting holes 104 are symmetrically arranged around the carrier 101. A leveling cylinder 105 is rotatably disposed within each mounting hole 104. A turbine 106 is horizontally disposed at the bottom end of the leveling cylinder 105, and the turbine 106 is coaxial with the leveling cylinder 105. Lifting rods 10 corresponding to the leveling cylinder 105 are arranged around the heated bed 102. 7. The leveling cylinder 105 and the lifting rod 107 are connected by threads. Four parallel worm gears 108 are rotatably provided at the bottom of the support seat 101. The four worm gears 108 are respectively engaged with the corresponding turbines 106. One end of each of the four worm gears 108 extends to the front of the support seat 101. An adjusting wheel 109 is coaxially connected to the end of the worm gear 108 located in front of the support seat 101. The magnetic panel 103 is provided on the top surface of the heated bed 102. Specifically, the bottom end of the leveling cylinder 105 extends out of the outside of the first mounting hole 104. The turbine 106 is coaxially fixedly connected to the bottom end of the leveling cylinder 105. The diameter of the helical tooth segment of the worm 108 is larger than that of the non-tooth segment. The two worms 108 on the same side are connected to the turbine 106 at different positions to avoid interference between the worms 108. The inner wall of the leveling cylinder 105 is set with an internal thread structure. The lower part of the lifting rod 107 is set with an external thread structure that is connected to the internal thread structure. The lower part of the lifting rod 107 is connected to the inside of the leveling cylinder 105. In this embodiment, by manually rotating the adjusting wheel 109, the corresponding worm gear 108 is driven to rotate. The worm gear 108 drives the turbine 106 and the leveling cylinder 105 to rotate synchronously. When the leveling cylinder 105 rotates, it drives the lifting rod 107 to rise and fall. The lifting rod 107 drives the corresponding end of the heated bed 102 to rise and fall on the support seat 101, thereby adjusting the levelness of the heated bed 102. Since one end of each worm gear 108 extends to the front of the support seat 101, the operator does not need to bend over or laboriously reach into the bottom of the equipment or into a narrow space to perform the leveling operation, which significantly reduces the difficulty and tediousness of the leveling operation and improves work efficiency. Moreover, all the adjusting wheels 109 are concentrated in front, which makes it easy for the operator to observe and compare the position status of multiple leveling points at the same time. The turbine 106 and worm gear 108 transmission have self-locking characteristics. After the height is adjusted by adjusting the wheel 109, it is not easy to rotate or shift on its own under the vibration generated during the printing process, thus improving stability.

[0029] In a specific example, a second mounting hole 110 is provided around the heated bed 102, a limit cap 111 is provided at the top of the lifting rod 107, the upper part of the lifting rod 107 is movably inserted into the second mounting hole 110, the lower part of the lifting rod 107 is threadedly connected to the leveling cylinder 105, a keyway 112 is provided on the inner wall of the second mounting hole 110, a flat key 113 corresponding to the keyway 112 is provided on the outer periphery of the lifting rod 107, and a spring 114 is sleeved on the outer periphery of the lifting rod 107. One end of the spring 114 abuts against the bottom surface of the heated bed 102, and the other end of the spring 114 abuts against the top surface of the bearing seat 101. Specifically, the keyway 112 is a through-slot structure extending from the top to the bottom of the second mounting hole 110. When the lifting rod 107 is inserted into the second mounting hole 110, the cooperation of the flat key 113 and the keyway 112 restricts the lifting rod 107 to only move up and down and prevents it from rotating. The diameter of the limit cap 111 is larger than the diameter of the second mounting hole 110. When the leveling cylinder 105 rotates forward and drives the lifting rod 107 to descend, the lifting rod 107 can be lowered by pulling down the heated bed 102 to compress the spring 114. When the leveling cylinder 105 rotates in reverse and drives the lifting rod 107 to rise, the heated bed 102 rises under the restoring force of the spring 114. Through the cooperation of the flat key 113 and the keyway 112, the possibility of rotation of the lifting rod 107 is eliminated, ensuring the pure linearity of the leveling movement. The spring 114 can provide a buffer for the heated bed 102. When the heated bed 102 is raised, the spring 114 can provide a restoring force, making the adjustment easier.

[0030] In a specific example, a recessed stepped surface 115 is provided at the upper end of the second mounting hole 110, making the second mounting hole 110 a countersunk hole structure, and the limiting cap 111 is embedded in the stepped surface 115. By embedding the limiting cap 111 into the countersunk hole, the top surface of the heated bed 102 can be kept flat, avoiding interference or instability that may be caused by the limiting cap 111 protruding.

[0031] In a specific example, a scale ring 116 is fitted on the adjusting wheel 109, that is, the adjusting wheel 109 is a handwheel with a scale, which changes the leveling process from "by feeling" to "quantifiable", thus improving the adjustment efficiency. Example 2

[0032] Please see Figures 1 to 8This embodiment also discloses a 3D printer, which includes the above-mentioned printing platform 1, base 2 and printing nozzle module 3. An X-axis assembly 4, a Y-axis assembly 5 and a Z-axis assembly 6 are installed on the base 2. The printing platform 1 is installed on the Y-axis assembly 5 and can move back and forth under the drive of the Y-axis assembly 5. The printing nozzle module 3 is installed on the X-axis assembly 4 and the X-axis assembly 4 is installed on the Z-axis assembly 6. The X-axis assembly 4 can move up and down on the Z-axis assembly 6. The printing nozzle module 3 can move left and right on the X-axis assembly 4. The printing nozzle module 3 is a prior art product and will not be described in detail here. Specifically, the Y-axis assembly 5 includes a Y-axis guide rail 501, a Y-axis lead screw 502, and a Y-axis drive motor 503. A Y-axis lead screw nut pair 504, which slidably connects to the Y-axis lead screw 502, is mounted on the Y-axis guide rail 501. The Y-axis lead screw 502 is parallel to the Y-axis guide rail 501. The Y-axis guide rail 501 supports the Y-axis lead screw nut pair 504 and the printing platform 1. The output end of the Y-axis drive motor 503 is connected to one end of the Y-axis lead screw 502. The Y-axis lead screw nut pair 504 is fixedly connected to the bottom of the support seat 101 of the printing platform 1. When the Y-axis drive motor 503 rotates forward and backward, it can drive the entire printing platform 1 to move via the Y-axis lead screw nut pair 504. Similarly, the X-axis assembly 4 includes an X-axis guide rail 401, an X-axis lead screw 402, and an X-axis drive motor 403. The printhead module 3 is slidably mounted on the X-axis guide rail 401 via the X-axis lead screw nut pair 404. The X-axis drive motor 403 is connected to the X-axis lead screw 402. The forward and reverse rotation of the X-axis drive motor 403 can drive the print head module 3 mounted on the X-axis lead screw nut pair 404 to move. Similarly, the Z-axis assembly 6 includes a Z-axis guide rail 601, a Z-axis lead screw 602, and a Z-axis drive motor 603. The Z-axis guide rail 601 has a gantry structure, and its bottom two ends are vertically fixed to both sides of the base 2. Of course, the Z-axis guide rail 601 can also be two independent vertical guide rails, that is, the top of the guide rails are not connected. The two ends of the X-axis guide rail 401 are slidably connected to the Z-axis guide rail 601. The Z-axis lead screw 602 is connected to the X-axis guide rail 401 through the Z-axis lead screw nut pair 604. The Z-axis drive motor 603 is connected to the Z-axis lead screw 602. The Z-axis drive motor 603 drives the Z-axis lead screw 602 to rotate, thereby driving the entire X-axis guide rail 401 to rise and fall along the Z-axis guide rail 601. The Y-axis lead screw 502, X-axis lead screw 402, and Z-axis lead screw 602 are ball screws, while the Y-axis drive motor 503, X-axis drive motor 403, and Z-axis drive motor 603 are servo motors or stepper motors.

[0033] In a preferred embodiment, a protective cover 7 is provided on the base 2. The printing platform 1, the print head module 3, the X-axis assembly 4, the Y-axis assembly 5, and the Z-axis assembly 6 are all located inside the protective cover 7. An entrance / exit 701 is provided on the front of the protective cover 7, and a closed door 702 is provided at the entrance / exit 701. A transparent viewing window 703 is provided on the side wall of the closed door 702 and / or the protective cover 7. Specifically, the closed door 702 closes or opens the entrance / exit 701, and the transparent viewing window 703 facilitates observation of the internal working conditions. The protective cover 7 closes or partially closes the printing space, which can prevent dust from adhering to the printing platform 1 or the unformed model, effectively reduce heat loss from the printing platform 1 (heated bed 102), and help maintain temperature stability.

[0034] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A printing platform for a 3D printer, characterized in that: The device includes a support base, a heated bed, and a magnetic panel. The support base has symmetrical first mounting holes around its perimeter. A leveling cylinder is rotatably mounted in each of the first mounting holes. A turbine is coaxially mounted at the bottom of the leveling cylinder. The heated bed has lifting rods corresponding to the leveling cylinder around its perimeter. The leveling cylinder and the lifting rods are connected by threads. The bottom of the support base has four parallel worm gears rotatably mounted. Each of the four worm gears is meshed with a corresponding turbine, and one end of each of the four worm gears extends to the front of the support base. An adjusting wheel is coaxially connected to the front end of each worm gear. The magnetic panel is located on the top surface of the heated bed.

2. The printing platform as described in claim 1, characterized in that: The heated bed has a second mounting hole around its perimeter. The top of the lifting rod is provided with a limiting cap. The lifting rod is movably inserted into the second mounting hole. The lower part of the lifting rod is threadedly connected to the leveling cylinder. The inner wall of the second mounting hole is provided with a keyway. The outer periphery of the lifting rod is provided with a flat key corresponding to the keyway. A spring is sleeved on the outer periphery of the lifting rod. One end of the spring abuts against the bottom surface of the heated bed, and the other end of the spring abuts against the top surface of the bearing seat.

3. The printing platform as described in claim 2, characterized in that: The upper end of the second mounting hole has a concave stepped surface, making the second mounting hole a countersunk hole structure, and the limiting cap is embedded in the stepped surface.

4. The printing platform as described in claim 3, characterized in that: The inner wall of the leveling cylinder is provided with an internal thread structure, and the lower part of the lifting rod is provided with an external thread structure that mates with the internal thread structure.

5. The printing platform as described in claim 4, characterized in that: The adjusting wheel is fitted with a graduated ring.

6. A 3D printer, characterized in that: The device includes a printing platform, a base, and a print head module as described in any one of claims 1 to 5, wherein an X-axis assembly, a Y-axis assembly, and a Z-axis assembly are mounted on the base, the printing platform is mounted on the Y-axis assembly, the print head module is mounted on the X-axis assembly, and the X-axis assembly is mounted on the Z-axis assembly.

7. The 3D printer as described in claim 6, characterized in that: The Y-axis assembly includes a Y-axis guide rail, a Y-axis lead screw, and a Y-axis drive motor. A Y-axis lead screw nut pair is slidably disposed on the Y-axis guide rail and is connected to the Y-axis lead screw. The Y-axis drive motor is connected to the Y-axis lead screw, and the Y-axis lead screw nut pair is connected to the support of the printing platform.

8. The 3D printer as described in claim 7, characterized in that: The X-axis assembly includes an X-axis guide rail, an X-axis lead screw, and an X-axis drive motor. The printhead module is slidably mounted on the X-axis guide rail via an X-axis lead screw nut pair, and the X-axis drive motor is connected to the X-axis lead screw.

9. The 3D printer as described in claim 8, characterized in that: The Z-axis assembly includes a Z-axis guide rail, a Z-axis lead screw, and a Z-axis drive motor. The Z-axis guide rail is vertically fixed to both sides of the base in a gantry structure. The two ends of the X-axis guide rail are slidably connected to the Z-axis guide rail. The Z-axis lead screw is connected to the X-axis guide rail through a Z-axis lead screw nut pair. The Z-axis drive motor is connected to the Z-axis lead screw.

10. The 3D printer as described in claim 9, characterized in that: The base is equipped with a protective cover. The printing platform, the print head module, the X-axis assembly, the Y-axis assembly, and the Z-axis assembly are all located inside the protective cover. The front of the protective cover has an entrance and an exit, and the entrance and exit are equipped with a closed door. The closed door and / or the side wall of the protective cover are equipped with a transparent window.

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