Displacement device applied to printing platform in 3D printer

Abstract

The utility model discloses a shifting device applied to a printing platform in a 3D (three-dimensional) printer, which comprises a fixing part for surrounding and positioning a plurality of stacked printing platforms, and a push rod component driven by a motor to reciprocate along a lead screw, the push rod assembly comprises a structural frame used for being connected with the lead screw in a threaded mode, two installation bases perpendicular to the structural frame are symmetrically arranged on the two sides of the structural frame towards the fixing piece, and each installation base is provided with a non-return piece which rotates relative to the installation base to stretch out and draw back. An auxiliary supporting slow descending assembly rotating relative to the mounting seat is mounted in the middle of the mounting seat in a penetrating manner; the motor drives the push rod assembly to reciprocate, and the telescopic non-return mechanism is matched with the supporting slow descending assembly to effectively achieve continuous feeding of the printing platform.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing equipment, and in particular to a shifting device for the printing platform in a 3D printer. 。 Background Technology

[0002] A 3D printer, also known as a three-dimensional printer or stereo printer, is a rapid prototyping process. Currently, the 3D printing technology used in 3D printers is Fused Deposition Modeling (FDM), which uses powdered materials such as metal or plastic to construct three-dimensional objects layer by layer based on a digital model. Specifically, an FDM 3D printer uses a feeding mechanism to supply molten filament material to the hot end of the printer. The molten filament is heated to a molten state within the hot end. The hot end moves along the printing path of the 3D printer, extruding the molten material onto a printing plate, printing the three-dimensional object layer by layer.

[0003] CN2024116128263 discloses a 3D printing device with automatic substrate replacement function. The invention provides a substrate storage cavity, a substrate receiving cavity, a lead screw drive, a first moving clamping member, and a second moving clamping member within the main body of the device. After the parts on the substrate above the pad are processed, the second moving clamping member moves the used substrate to the top of the substrate receiving cavity, and the first moving clamping member moves the unused substrate to the top of the pad, thus achieving automatic substrate replacement without the need for manual substrate replacement. Summary of the Invention

[0004] The purpose of this invention is to provide a displacement device for the printing platform in a 3D printer. This invention, accompanied by the reciprocating movement of a motor-driven push rod assembly, and a telescopic check mechanism working in conjunction with a support and slow-descent assembly, effectively achieves continuous feeding of the printing platform. 。

[0005] To solve this technical problem, the technical solution of this utility model is: a shifting device for a printing platform in a 3D printer, including a fixing member that surrounds and positions multiple stacked printing platforms, and a push rod assembly that is driven by a motor to reciprocate along the movement of a lead screw.

[0006] The push rod assembly includes a structural frame for threaded connection of the lead screw. Two mounting seats perpendicular to the structural frame are symmetrically arranged on both sides of the structural frame toward the fixing member. Each mounting seat is provided with a check element that rotates relative to the mounting seat to form a telescopic movement. An auxiliary support and slow-descent assembly that rotates relative to the mounting seat is installed through the middle of the mounting seat.

[0007] In a further improvement, the auxiliary support descent assembly includes an auxiliary support rod that rotates relative to the mounting base, with rollers mounted at both ends of the auxiliary support rod.

[0008] In a further improvement, the auxiliary support rod is connected to the mounting base via a connecting pin and a first torsion spring.

[0009] This utility model also provides an auxiliary support and slow-descent component on the mounting base of the push rod assembly. During the process of pushing the printing platform at the bottom, the rollers on the upper and lower sides of the auxiliary support and slow-descent component are respectively relative to the support plane where the stacked printing platform and the auxiliary support and slow-descent component roll down, thereby ensuring the stable descent of the stacked printing platform.

[0010] In a further improvement, the check valve is connected to the mounting base via a pin and a second torsion spring.

[0011] This invention uses a torsion spring to drive an auxiliary support rod to lift the rod to its initial position.

[0012] In a further improvement, the auxiliary support rod includes a connecting portion and a connecting claw for mounting the roller, wherein the upper connecting claw is longer than the lower connecting claw. This invention utilizes the length difference of the auxiliary support rod to achieve a gradual descent of the auxiliary support rod relative to the mounting base as it rotates downwards with the downward pressure of the stacked printing platform, moving to the support plane where the lower roller of the auxiliary support descent assembly is located, thereby providing a gradual descent support for the stacked printing platform.

[0013] In a further improvement, the fastener is provided with a flipper for blocking the printing platform inside the fastener, the flipper being mounted to the fastener by means of a snap ring and a pin.

[0014] The flipping component flips towards the heated bed as the printing platform is pushed. After the printing platform is completely removed from the fixing component, the anti-return component retracts to the initial position behind the stacked printing platform along with the push rod assembly. The flipping component resets and blocks the printing platform under the drive of the snap ring to prevent the printing platform from sliding out during the shaking process. When a push force is applied to the printing platform, the flipping component assembly will be lifted to realize the displacement of the printing platform.

[0015] Further improvements include a structural frame that moves reciprocally along a lead screw via a brass nut;

[0016] The motor drives the lead screw to rotate via a closed-loop synchronous belt.

[0017] In a further improvement, the check valve is a continuous shell structure with a hollow structure, and the check valve has a curved surface structure for contacting the falling printing platform.

[0018] Further improvements include a curved structure comprising a protrusion extending from the mounting base when the check valve rotates from a vertical to a horizontal position, and a support portion rotating out of the mounting base. The initial position of the push rod assembly is defined as the position of the push rod assembly when the push rod assembly and the fixing member are on either side of the printing platform. The motor rotates forward, driving the push rod assembly to push the lowest printing platform. Under the pressure of the adjacent printing platform above and with the support portion confined within the mounting base structure, the check valve rotates from a vertical to a horizontal position, thus pushing the lowest printing platform. At this time, the rollers of the auxiliary support descent assembly contact the stacked printing platforms and the support plane, forming mutual support and relative displacement with the stacked printing platforms until the portion protrudes from the mounting base and extends beyond the notch of the fixing member, pushing the printing platform out. Subsequently, the motor reverses, driving the push rod assembly to move the rollers of the check valve and the auxiliary support descent assembly from below the stacked printing platforms back to their initial position. The push rod assembly disengages from the stacked printing platforms, and the check valve, losing the pressure of the stacked printing platforms, returns from a horizontal to a vertical position under the drive of the torsion spring. This process repeats, achieving the reciprocating displacement of the printing platform.

[0019] By adopting the above technical solution, the beneficial effects of this utility model are:

[0020] This utility model includes a fixing member that surrounds and positions multiple stacked printing platforms, and a push rod assembly driven by a motor to reciprocate along a lead screw. As the motor rotates forward and backward, the push rod assembly reciprocates along the lead screw within the length of the printing platform, thus pushing the printing platform out of the fixing member. After the bottommost printing platform is ejected, the adjacent printing platform above it falls onto the push rod assembly. The downward movement of the stacked printing platforms applies downward pressure to a check valve. The check valve rotates relative to the mounting base towards the bottommost printing platform being ejected, extending beyond the mounting base. Due to the length change caused by the rotation of the check valve, the horizontally moved printing platform within the fixing member is completely ejected from the fixing member. As the bottommost printing platform is ejected by the push rod assembly, the downward movement of the stacked printing platforms assists in the slow-descent component, effectively mitigating noise and vibration caused by the falling PE I plates. This utility model allows for the continuous ejection of printing platforms, such as PE I plates, one by one. As the bottommost PE I plate is ejected, the uppermost PE I plates... The I-plate descends, enabling automatic shifting and feeding of the printing platform, effectively improving printing efficiency. Attached Figure Description

[0021] Figure 1 This is a perspective view of a displacement device for a printing platform in a 3D printer, which relates to this utility model, wherein the push rod assembly is in the initial position of pushing the printing platform.

[0022] Figure 2 3D view of the fixture used for the stacked printing platform hopper;

[0023] Figure 3 This is a perspective view of the printing platform shifting device of this utility model, showing the feeding direction;

[0024] Figure 4 This is an exploded view of the fixing component of this utility model equipped with a flipping assembly;

[0025] Figure 5 This is an exploded view of the push rod assembly in this utility model;

[0026] Figure 6 This is a schematic diagram of the fit between the push rod assembly and the lead screw in this utility model.

[0027] In the picture:

[0028] Printing platform 100; Fixing component 1; Motor 2; Lead screw 3; Push rod assembly 4; Structural frame 41; Mounting base 42; Check valve 43; Second torsion spring 44; Auxiliary support slow descent assembly 5; Auxiliary support rod 51; Connecting part 511; Connecting claw 512; Roller 52; First torsion spring 53; Flipping component 6; Snap ring 61; Closed-loop synchronous belt 7. Detailed Implementation

[0029] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0030] This embodiment discloses a shifting device for the printing platform in a 3D printer, such as... Figures 1 to 6 As shown, the device includes a fixing member 1 that surrounds and positions a multi-sheet stacked printing platform 100, and a push rod assembly 4 that is driven by a motor 2 to reciprocate along the movement of a lead screw 3. The push rod assembly 4 includes a structural frame 41 for threaded connection of the lead screw 3. Two mounting seats 42 perpendicular to the structural frame 41 are symmetrically arranged on both sides of the structural frame 41 facing the fixing member 1. Each mounting seat 42 is provided with a check member 43 that rotates relative to the mounting seat 42 to form a telescoping mechanism. An auxiliary support and slow-descent assembly 5 that rotates relative to the mounting seat 42 is installed through the middle of the mounting seat 42.

[0031] In this embodiment, the auxiliary support descent assembly 5 includes an auxiliary support rod 51 that rotates relative to the mounting base 42, with rollers 52 installed at both ends of the auxiliary support rod 51; the auxiliary support rod 51 is connected to the mounting base 42 via a connecting pin and a first torsion spring 53.

[0032] In this embodiment, an auxiliary support and slow-descent component 5 is also provided on the mounting base 42 of the push rod assembly 4. During the process of pushing the lowest printing platform 100, the rollers 52 on the upper and lower sides of the auxiliary support and slow-descent component 5 are respectively relative to the stacked printing platform 100 and the support plane where the auxiliary support and slow-descent component 5 rolls down, thereby ensuring the stable descent of the stacked printing platform 100.

[0033] In this embodiment, the check valve 43 is connected to the mounting base 42 via a pin and a second torsion spring 44.

[0034] In this embodiment, the first torsion spring 53 drives the auxiliary support rod 51 to be lifted to the initial position.

[0035] In this embodiment, the auxiliary support rod 51 includes a connecting portion 511 and a connecting claw 512 for mounting the roller 52, wherein the upper connecting claw 512 is longer than the lower connecting claw 512. This embodiment utilizes the length difference of the auxiliary support rod 51 to achieve a gradual descent support for the stacked printing platform 100 by rotating relative to the mounting base 42 as the stacked printing platform 100 applies downward pressure.

[0036] In this embodiment, the fixing member 1 is provided with a flipping member 6 for blocking the printing platform 100 inside the fixing member 1. The flipping member 6 is installed on the fixing member 1 by means of a snap ring 61 and a pin.

[0037] As the printing platform 100 is pushed, the flipping component 6 flips towards the heated bed. After the printing platform 100 is completely moved out of the fixing component 1, the check component 43 retracts to the initial position behind the stacked printing platform 100 along with the push rod assembly 4. The flipping component 6 is reset and blocks the printing platform 100 under the drive of the retaining spring 61 to prevent the printing platform 100 from sliding out during the shaking process. When a push force is applied to the printing platform 100, the flipping component 6 assembly will be lifted to realize the displacement of the printing platform 100.

[0038] In this embodiment, the structural frame 41 reciprocates along the lead screw 3 via a brass nut 411; the motor 2 drives the lead screw 3 to rotate via a closed-loop synchronous belt 7. In this embodiment, the check valve 43 is a continuous shell structure with a hollow structure, and the check valve 43 has a curved surface structure for contacting the falling printing platform 100.

[0039] The curved structure described in this embodiment includes a protrusion 431 that extends out of the mounting base 42 when the anti-return element 43 rotates from the vertical position to the horizontal position, and a support portion 432 that rotates out from the mounting base 42.

[0040] The specific working process of this embodiment is as follows:

[0041] The initial position of the push rod assembly 4 is defined as the position of the push rod assembly 4 when the push rod assembly 4 and the fixing part 1 are on both sides of the printing platform 100. The motor 2 rotates in the forward direction, driving the push rod assembly 4 to push the lowermost printing platform 100. It is subjected to the pressure of the adjacent printing platform 100 above and the support part 432 is limited to the structure of the mounting base 42. The check part 43 rotates from the vertical position to the horizontal position to push the lowermost printing platform 100.

[0042] At this time, the rollers 52 of the auxiliary support descent assembly 5 contact the stacked printing platform 100 and the support plane below it respectively, forming mutual support and relative displacement between the stacked printing platform 100 and the part protruding from the mounting base 42 and extending below the fixing member 1 to push out the printing platform 100.

[0043] Subsequently, the motor 2 reverses and drives the push rod assembly 4 to move the anti-return component 43 and the roller 52 of the auxiliary support descent assembly 5 from under the stacked printing platform 100 back to the initial position. The push rod assembly 4 disengages from the stacked printing platform 100, and the anti-return component 43, losing the pressure of the stacked printing platform 100, returns from the horizontal position to the vertical position under the drive of the torsion spring 53. This process is repeated to achieve the reciprocating movement of the printing platform 100.

[0044] In this embodiment, the wire diameter of the first torsion spring 53 is 0.3mm. The first torsion spring 53 can make the anti-reverse element bounce up, and will not lift the printing platform during the process of retraction due to excessive force.

[0045] This embodiment includes a fixing member 1 that surrounds and positions multiple stacked printing platforms 100, and a push rod assembly 4 driven by a motor 2 to reciprocate along the movement of a lead screw 3. As the motor 2 rotates forward and backward, it drives the push rod assembly 4 to reciprocate along the lead screw 3 within the length of the printing platform 100, thereby pushing the printing platform 100 out of the fixing member 1. After the bottommost printing platform 100 is pushed out, the adjacent printing platform 100 above it falls onto the push rod assembly 4. The downward movement of the stacked printing platforms 100 applies downward pressure to the check member 43. The check member 43 rotates relative to the mounting base 42 towards the bottommost printing platform 100 that has been pushed out, extending out of the mounting base 42. Due to the length change caused by the rotation of the check member 43, the horizontally moved printing platform 100 is completely pushed out of the fixing member 1. As the bottommost printing platform 100 is pushed out by the push rod assembly 4, the downward movement of the stacked printing platforms 100 assists in the slow-descent assembly 5, effectively mitigating the impact of PE... The noise and vibration generated by the falling PE I plates are mitigated by this embodiment, which allows for the continuous and sequential ejection of printing platform 100, such as PE I plates. As the bottom PE I plate is ejected, the upper PE I plates descend, achieving automatic shifting and feeding of printing platform 100, effectively improving printing efficiency. In this embodiment, the push rod assembly 4 is driven by motor 2 to reciprocate, and the telescopic check valve 43, in conjunction with the support and slow-descent assembly, effectively achieves continuous feeding of printing platform 100.

Claims

1. A displacement device applied to a printing platform in a 3D printer, characterized in that: The device comprises a fixed part surrounding a plurality of stacked printing platforms, and a push rod assembly driven by a motor to move along a screw rod. The push rod assembly comprises a structural frame for screwing the screw rod, and two mounting seats perpendicular to the structural frame are symmetrically arranged on both sides of the structural frame, each mounting seat is provided with a check member rotating relative to the mounting seat to form an extension and contraction, and an auxiliary support and slow descent assembly is arranged in the mounting seat and rotates relative to the mounting seat.

2. The displacement device for the printing platform of the 3D printer according to claim 1, wherein: The auxiliary support and slow descent assembly comprises an auxiliary support rod rotating relative to the mounting seat, and two rollers are arranged at both ends of the auxiliary support rod.

3. The displacement device for the printing platform of the 3D printer according to claim 2, wherein: A first torsion spring is arranged between the auxiliary support rod and the mounting seat to automatically reset the auxiliary support rod.

4. The displacement device for the printing platform of the 3D printer according to claim 2, wherein: The auxiliary support rod comprises a connecting part and a connecting claw for mounting the roller, and the connecting claw at the upper side is longer than the connecting claw at the lower side.

5. The displacement device for the printing platform of the 3D printer according to claim 1, wherein: The check member is connected to the mounting seat through a pin and a second torsion spring.

6. The displacement device for the printing platform of the 3D printer according to claim 1, wherein: The fixed part is provided with a turnover member for blocking the printing platform inside the fixed part, and the turnover member is mounted on the fixed part through a snap spring and a pin.

7. The displacement device for the printing platform of the 3D printer according to claim 1, wherein: The structural frame moves along the screw rod through a brass nut, and the motor drives the screw rod to rotate through a closed loop synchronous belt.

8. A displacement device for a printing platform in a 3D printer according to any one of claims 1 to 7, characterized in that: The check member is a continuous shell structure with a hollow structure, and the check member has a curved surface structure for contacting the falling printing platform.

9. A displacement device for a printing platform in a 3D printer according to claim 8, characterized in that: The curved surface structure comprises a convex part extending out of the mounting seat when the check member rotates from a vertical position to a horizontal position, and a support part rotating out of the mounting seat.

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