Automatic leveling device for hot bed of 3D printer

Abstract

The utility model belongs to the technical field of 3D printers, and particularly relates to a 3D printer hot bed automatic leveling device which comprises a rack and a hot end assembly, the hot end assembly is assembled at the upper end of the interior of the rack, a horizontal plate is fixed to the lower end of the interior of the rack, and a plurality of supporting seats are fixed to the upper end of the horizontal plate; push rods are slidably connected to the upper ends of the interiors of the multiple supporting seats, moving rods are fixed to the lower ends of the multiple push rods, multiple control lamps are fixed to the lower end of the horizontal plate and correspond to the multiple supporting seats in a one-to-one mode, and the lower ends of the moving rods penetrate through the lower ends of the supporting seats and extend into the control lamps; a spring is arranged in the supporting seat and located on the outer side of the moving rod. The bottom plate and the hot bed can move downwards through the multiple lifting mechanisms, the push rod and the movable rod are driven to descend till the control lamp can be lightened, and the hot bed can be leveled when the control lamp is lightened at the same time.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printer technology, specifically relating to an automatic leveling device for a heated bed in a 3D printer. Background Technology

[0002] With the rapid development of 3D printing technology, Fused Deposition Modeling (FDM), as a widely used 3D printing process, has printing quality affected by many factors, among which the levelness of the heated bed is one of the key factors. The levelness of the heated bed directly affects whether the printing material can adhere evenly to the heated bed, thus affecting the accuracy, quality, and success rate of the printed model.

[0003] Currently, most heated bed leveling operations in 3D printers are performed manually. Manual leveling relies on the operator's experience and skills, achieved by visually inspecting and manually adjusting the screws at the four corners of the heated bed. This method is not only cumbersome and time-consuming, but also makes it difficult to guarantee leveling accuracy. For inexperienced operators, achieving precise heated bed leveling is challenging. Even experienced operators cannot avoid leveling errors caused by human factors, potentially leading to problems such as warping, delamination, or even printing failures.

[0004] Furthermore, while some existing automatic leveling devices improve leveling efficiency to some extent, they are often complex in structure and expensive. Therefore, based on the above problems, this application proposes an automatic leveling device for a heated bed in a 3D printer to improve these issues. Utility Model Content

[0005] The purpose of this invention is to provide an automatic leveling device for a heated bed in a 3D printer. This device uses multiple lifting mechanisms to move the base plate and heated bed downwards, causing the push rod and moving rod to descend until the control light is lit. The controller then stops the lifting mechanism at the end that controls the lit light until the heated bed is fully lit and roughly level. After that, the lifting mechanism is restarted to raise the heated bed and then lower it slowly. Once the control light is lit at the same time, the heated bed can be leveled.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] An automatic leveling device for a heated bed in a 3D printer includes a frame and a hot end assembly. The hot end assembly is mounted on the upper part of the frame. A horizontal plate is fixed to the lower part of the frame. Multiple support seats are fixed to the upper part of the horizontal plate. Push rods are slidably connected to the upper parts of the multiple support seats. Movable rods are fixed to the lower parts of the multiple push rods. Multiple control lights are fixed to the lower part of the horizontal plate, and each control light corresponds to one of the multiple support seats. The lower part of the movable rod passes through the lower part of the support seat and extends into the interior of the control light. A spring is provided inside the support seat and outside the movable rod. Multiple lifting mechanisms are mounted at both ends of the frame.

[0008] In a preferred embodiment, a limiting plate is fixed to one end of the push rod, and a limiting hole is provided at the end of the support seat near the limiting plate, and the limiting plate and the limiting hole are compatible.

[0009] In a preferred embodiment, the upper end of the control lamp is provided with a dustproof cover.

[0010] In a preferred embodiment, the lifting mechanism includes a fixed plate, a motor, a threaded rod, a movable block, and a support plate. The fixed plate is fixed inside the frame, the motor is fixed to the lower end of the fixed plate, the threaded rod is fixed to the output end of the motor, the movable block is threaded to the outside of the threaded rod, and the support plate is fixed to the upper end of the fixed plate. A limit groove is formed at the end of the support plate near the movable block, and a limit block is provided at the end of the movable block near the support plate. The limit groove and the limit block are compatible.

[0011] In a preferred embodiment, the upper end of the movable block is provided with a base plate, and a fixing column is fixed at each of the four corners of the upper end of the base plate, and a heated bed is fixed at the upper end of the four fixing columns.

[0012] In a preferred embodiment, a controller is fixed inside the frame, and the controller is electrically connected to the motor and the control light via wires.

[0013] The technical effects achieved by this utility model are as follows:

[0014] When the heated bed needs to be leveled, this utility model uses multiple lifting mechanisms to move the base plate and heated bed downwards. As the base plate moves downwards, the push rod drives the moving rod to descend. When the moving rod descends, the control lights illuminate. When the control lights are on, the controller stops the lifting mechanism at the end with the control light on from operating until all the control lights are on. The heated bed is now roughly level in all directions. The lifting mechanism is then restarted to raise the heated bed. The heated bed is then slowly lowered again using the lifting mechanism. When multiple control lights illuminate simultaneously, the base plate and heated bed are now level. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a side view of the overall structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the support base and control lamp of this utility model;

[0018] Figure 4 This is a schematic diagram of the lifting mechanism of this utility model.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 10. Frame; 11. Hot end assembly; 12. Horizontal plate; 13. Support base; 14. Push rod; 15. Moving rod; 16. Control light; 17. Spring; 18. Dustproof shell; 20. Limit plate; 21. Limit hole; 25. Lifting mechanism; 26. Fixed plate; 27. Motor; 28. Threaded rod; 29. ​​Moving block; 30. Support plate; 31. Controller; 32. Base plate; 33. Fixed column; 34. Heated bed. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of this utility model. However, this utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this utility model. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0024] Secondly, this utility model is described in detail with reference to the schematic diagrams. When detailing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0025] Please see the appendix Figures 1 to 3As shown, this utility model provides an automatic leveling device for a heated bed of a 3D printer, including a frame 10 and a hot end assembly 11. The hot end assembly 11 is assembled at the upper end inside the frame 10. A horizontal plate 12 is fixed at the lower end inside the frame 10. Multiple support seats 13 are fixed at the upper end of the horizontal plate 12. Push rods 14 are slidably connected to the upper end of the multiple support seats 13. Movable rods 15 are fixed at the lower end of the multiple push rods 14. Multiple control lights 16 are fixed at the lower end of the horizontal plate 12, and the multiple control lights 16 correspond one-to-one with the multiple support seats 13. The lower end of the movable rod 15 passes through the lower end of the support seat 13 and extends into the interior of the control light 16. A spring 17 is provided inside the support seat 13 and outside the movable rod 15. Multiple lifting mechanisms 25 are assembled at both ends inside the frame 10.

[0026] In this embodiment, when the heated bed 34 needs to be leveled, the lifting mechanism 25 drives the base plate 32 and the heated bed 34 to move slowly downwards. When the base plate 32 descends, it can drive the push rod 14 to move downwards. The push rod 14 and the support base 13, as well as the support base 13 and the moving rod 15, are all slidably connected. The lower end of the moving rod 15 passes through the lower end of the support base 13 and extends into the interior of the control lamp 16. The control lamp 16 is a lamp controlled by a normally open jog switch. The lower end of the moving rod 15 is located above the jog switch inside the control lamp 16. When the moving rod 15 moves downwards, it can press the jog switch of the control lamp 16, and the control lamp 16 will light up. The controller 31 then controls the lamp to illuminate. The lifting mechanism 25 located at the end where the control light 16 is lit is not operating. The remaining lifting mechanisms 25 continue to descend under the action of the controller 31. When multiple control lights 16 are lit, multiple lifting mechanisms 25 are not operating. Then, the lifting mechanism 25 is restarted to raise the base plate 32 and the heated bed 34, and then slowly descends until the control lights 16 are lit at the same time, achieving a horizontal state between the base plate 32 and the heated bed 34. It should be noted that in the initial state, multiple control lights 16 are in an off state. The normally open inching switch is a prior art and will not be described in detail. The support base 13 and the horizontal plate 12 are in a horizontal state, and the spring 17 is in an extended state. The lifting mechanism 25 in the figure is three in number.

[0027] In a preferred embodiment, please refer to Figure 3 One end of the push rod 14 is fixed with a limit plate 20, and the support base 13 has a limit hole 21 at the end near the limit plate 20, and the limit plate 20 and the limit hole 21 are compatible.

[0028] In this embodiment, the matching design of the limiting plate 20 and the limiting hole 21 can effectively prevent the push rod 14 from being misaligned or shifted during the movement, ensuring the accuracy of the leveling process of the heated bed 34.

[0029] Secondly, please refer to again Figure 3 A dust cover 18 is provided on the upper end of the control light 16.

[0030] In this embodiment, the dust cover 18 can effectively prevent dust or other debris from entering the interior of the control lamp 16, avoid the dimming of the light or malfunction due to contamination, and ensure the normal operation of the control lamp 16.

[0031] Secondly, please refer to the following as well. Figure 2 and Figure 4 The lifting mechanism 25 includes a fixed plate 26, a motor 27, a threaded rod 28, a moving block 29, and a support plate 30. The fixed plate 26 is fixed inside the frame 10. The motor 27 is fixed to the lower end of the fixed plate 26. The threaded rod 28 is fixed to the output end of the motor 27. The moving block 29 is threaded to the outside of the threaded rod 28. The support plate 30 is fixed to the upper end of the fixed plate 26. A limit groove is provided at one end of the support plate 30 near the moving block 29. A limit block is provided at one end of the moving block 29 near the support plate 30. The limit groove and the limit block are compatible. A base plate 32 is provided at the upper end of the moving block 29. Fixed posts 33 are fixed at the four corners of the upper end of the base plate 32. A heated bed 34 is fixed at the upper end of the four fixed posts 33.

[0032] In this embodiment, when the heated bed 34 needs to be leveled, the motor 27 rotates to drive the threaded rod 28 to rotate. Because a limit block is provided at one end of the moving block 29, and a limit groove is provided at one end of the support plate 30 near the moving block 29, the limit groove and the limit block are compatible. Therefore, when the threaded rod 28 rotates, the moving block 29 can rise or fall. Also, because a base plate 32 is provided at the upper end of the moving block 29, and a fixing post 33 is fixed at each of the four corners of the upper end of the base plate 32, and the heated bed 34 is fixed at the upper end of the four fixing posts 33, the rising or falling of the moving block 29 can drive the heated bed 34 to rise or fall.

[0033] In a preferred embodiment, please refer to Figure 2 The controller 31 is fixed inside the frame 10. The controller 31 is electrically connected to the motor 27 and the control lamp 16 through wires.

[0034] In this embodiment, the controller 31, as the core control unit, is electrically connected to the motor 27 and can precisely control the motor 27's starting, stopping, speed, and direction of operation. The controller synchronously controls the two motors 27, ensuring synchronous starting, stopping, and speed, thereby achieving synchronous rotation of the two threaded rods 28 and preventing jamming during the lifting and lowering of the base plate 32. The control light 16 is electrically connected to the controller 31, allowing its status to be fed back to the controller 31 in real time. When the moving rod 15 triggers the control light 16, the controller 31 immediately receives this signal and makes corresponding adjustments to the motor 27. This is existing technology and will not be elaborated further.

[0035] The working principle of this utility is as follows:

[0036] When the heated bed 34 needs to be leveled, multiple lifting mechanisms 25 drive the base plate 32 and the heated bed 34 to move downwards. When the base plate 32 moves downwards, the push rod 14 drives the moving rod 15 to descend. When the moving rod 15 descends, the control light 16 lights up. When the control light 16 lights up, the controller 31 stops the lifting mechanism 25 at the end where the control light 16 is lit. This continues until all the control lights 16 are lit, and the heated bed 34 is in a roughly horizontal state in all directions. The lifting mechanism 25 is then restarted to raise the heated bed 34. The base plate 32 and the heated bed 34 are then slowly lowered again by the lifting mechanism 25. When multiple control lights 16 light up simultaneously, the heated bed 34 and the leveling plate 12 remain horizontal.

[0037] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the art.

Claims

1. An automatic leveling device for a heated bed in a 3D printer, comprising a frame (10) and a hot end assembly (11), wherein the hot end assembly (11) is mounted on the upper end inside the frame (10), characterized in that: A horizontal plate (12) is fixed to the lower end of the frame (10). Multiple support seats (13) are fixed to the upper end of the horizontal plate (12). Push rods (14) are slidably connected to the upper ends of the multiple support seats (13). Movable rods (15) are fixed to the lower ends of the multiple push rods (14). Multiple control lights (16) are fixed to the lower end of the horizontal plate (12). The multiple control lights (16) and multiple support seats (13) correspond one-to-one. The lower end of the movable rod (15) passes through the lower end of the support seat (13) and extends into the interior of the control light (16). A spring (17) is provided inside the support seat (13) and outside the movable rod (15). Three lifting mechanisms (25) are assembled at both ends inside the frame (10).

2. The automatic leveling device for a heated bed in a 3D printer according to claim 1, characterized in that: One end of the push rod (14) is fixed with a limiting plate (20), and the support base (13) has a limiting hole (21) at one end near the limiting plate (20), and the limiting plate (20) and the limiting hole (21) are compatible.

3. The automatic leveling device for a heated bed in a 3D printer according to claim 1, characterized in that: The upper end of the control lamp (16) is provided with a dust cover (18).

4. The automatic leveling device for a heated bed in a 3D printer according to claim 1, characterized in that: The lifting mechanism (25) includes a fixed plate (26), a motor (27), a threaded rod (28), a moving block (29), and a support plate (30). The fixed plate (26) is fixed inside the frame (10). The motor (27) is fixed to the lower end of the fixed plate (26). The threaded rod (28) is fixed to the output end of the motor (27). The moving block (29) is threaded to the outside of the threaded rod (28). The support plate (30) is fixed to the upper end of the fixed plate (26). A limiting groove is provided at one end of the support plate (30) near the moving block (29). A limiting block is provided at one end of the moving block (29) near the support plate (30). The limiting groove and the limiting block are compatible.

5. The automatic leveling device for a heated bed of a 3D printer according to claim 4, characterized in that: The upper end of the movable block (29) is provided with a base plate (32), and a fixing column (33) is fixed at each of the four corners of the upper end of the base plate (32), and a heated bed (34) is fixed at the upper end of the four fixing columns (33).

6. The automatic leveling device for a heated bed of a 3D printer according to claim 1, characterized in that: The controller (31) is fixed inside the frame (10). The controller (31) and the motor (27) and the controller (31) and the control lamp (16) are electrically connected by wires.

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