Surrounding type three-dimensional printing device

Abstract

The utility model relates to a surrounding type three-dimensional printing device. The surrounding type three-dimensional printing device comprises a mounting seat; the printing mechanism is rotationally connected to the mounting base around a first rotating axis; and the multiple hot beds are arranged on the mounting base around the first rotating axis, and each hot bed in the multiple hot beds is rotationally connected to the mounting base, so that the hot beds can be unfolded and folded relative to the mounting base in the radial direction of the first rotating axis. The surrounding type three-dimensional printing device is small in overall size and has a large printing range.

Description

Technical Field

[0001] The present disclosure relates to the technical field of three-dimensional printing, and in particular to a surround-type three-dimensional printing device. Background Art

[0002] Common desktop 3D printing equipment has a small printing range and can only print single parts or small parts. In order to expand the 3D printing range, there are two main methods: one is to expand the range of the printing platform, and the other is to use a sliding conveyor belt system.

[0003] The way to expand the range of the printing platform requires increasing the size of the printing platform to achieve a very large printing platform. At the same time, a print head that can move above the printing platform will be configured to achieve movement on the platform. This method is relatively simple and direct, and can accommodate larger-sized printing materials or print multiple objects. The 3D printing equipment using this method is large in overall size and occupies a large space. In addition, as the size of the printing platform increases, the weight also increases significantly, and it has to be configured with more powerful structural support and a more stable motion system to ensure printing quality and stability.

[0004] The sliding conveyor system expands the printing range by moving the print platform. The print platform is designed as a sliding conveyor belt, with the print head fixed to the conveyor belt. After a section of printing is completed, the conveyor belt rotates to move the printed part out of the way, allowing the next section to be printed. In practical applications, the speed of the conveyor belt must match the speed of the print head to ensure print quality and accuracy, which requires a very advanced control system. In addition, the conveyor belt system needs to be designed to withstand high-intensity motion for long periods of time, which increases the complexity of the equipment. Utility Model Content

[0005] Based on this, it is necessary to provide a surround-type three-dimensional printing device to address the problem of expanding the printing range.

[0006] An embodiment of the present disclosure provides a surround-type 3D printing device, which includes: a mounting base; a printing mechanism rotatably connected to the mounting base about a first rotation axis; and a plurality of heated beds disposed on the mounting base about the first rotation axis, each of the plurality of heated beds being rotatably connected to the mounting base so that the heated beds can be expanded and retracted relative to the mounting base along a radial direction of the first rotation axis.

[0007] By providing multiple heated beds surrounding a mounting base and a rotatable printing mechanism, the printing mechanism can perform 3D printing on different heated beds. The wraparound 3D printing device of the disclosed embodiment can print in multiple directions within a plane perpendicular to the first rotation axis, providing a large printing range and thereby improving overall printing efficiency. The wraparound 3D printing device is compact in size, occupies little space, is lightweight, and offers stable operation. Furthermore, it can be easily moved and transported.

[0008] In some embodiments, the printing mechanism includes a print head that is extendable and retractable in a radial direction of the first rotation axis so that the print head travels through the heated bed in an extended state.

[0009] This arrangement ensures that the printing mechanism can effectively print when it rotates to correspond to different heated beds.

[0010] In some embodiments, the printing mechanism also includes a connecting base, a first connecting arm and a second connecting arm that are rotatably connected in sequence. The connecting base is rotatably connected to the mounting base around a first rotation axis. The rotation axis of the first connecting arm relative to the connecting base and the rotation axis of the second connecting arm relative to the first connecting arm are respectively parallel to the first rotation axis, and the second connecting arm is connected to the print head.

[0011] Such an arrangement simplifies the structure of the printing mechanism and facilitates the folding of the printing mechanism, thereby reducing the occupied area of ​​the printing mechanism in the folded state on the horizontal plane.

[0012] In some embodiments, the connecting base is slidably connected to the mounting base along the first rotation axis.

[0013] Such an arrangement can effectively control the lifting and lowering of the print head, which is conducive to stable three-dimensional printing.

[0014] In some embodiments, the surround-type three-dimensional printing device further includes an annular guide rail and a box body, wherein the annular guide rail is arranged around a first rotation axis; the box body is connected to the mounting base by rotating around the first rotation axis through the annular guide rail, and the printing mechanism is arranged in the box body; the shape of the outer peripheral wall of the box body matches the hot bed in the folded state.

[0015] With this arrangement, the box can accommodate the printing mechanism and can match the hot bed, making the surround-type three-dimensional printing device compact in structure and occupying a small space; by providing an annular guide rail, the printing mechanism is ensured to rotate stably relative to the mounting seat.

[0016] In some embodiments, the surround-type three-dimensional printing device further includes: a stepper motor, a synchronous belt, and a synchronous wheel, wherein the output end of the stepper motor, the synchronous belt, and the synchronous wheel are located on the inner ring of the annular guide rail; the synchronous wheel is fixed to the box, the synchronous wheel is coaxially arranged with the annular guide rail, and the stepper motor is connected to the synchronous wheel via a synchronous belt transmission.

[0017] With such an arrangement, the mounting seat has a compact structure, and the stepping motor and the synchronous belt realize vector control, which has the beneficial effects of high efficiency and low cost.

[0018] In some embodiments, the second rotation axis of the heated bed relative to the mounting seat is perpendicular to the first rotation axis and perpendicular to the radial direction; the bed surface of the heated bed in the folded state faces the mounting seat in the radial direction.

[0019] With this setup, multiple heated beds can be deployed and folded in a simple and orderly manner. Folding the heated beds upwards facilitates setting up a lower mounting base, which provides a stable installation and facilitates the removal of printed products.

[0020] In some embodiments, the heated bed includes a bed body and bed legs, wherein the bed legs are used to support the bed body when the heated bed is in an unfolded state, and the bed legs include legs that are radially adjustable relative to the bed body.

[0021] With this arrangement, the hot bed is more stable in the unfolded state and occupies less space in the folded state.

[0022] In some embodiments, the heated bed is rotatably connected to the mounting base via a constant torque hinge; the constant torque hinge is configured to be inset-outset relative to the heated bed in a retracted state, and the constant torque hinge is used to limit the heated bed to keep it unfolded.

[0023] This arrangement ensures that the hot bed operates stably when switching states, and the surround-type three-dimensional printing device has a long service life.

[0024] In some embodiments, the mounting base includes three mounting feet evenly distributed around the first rotation axis; the multiple heating beds are three evenly distributed heating beds, and the three heating beds and the three mounting feet are alternately arranged around the first rotation axis.

[0025] With such an arrangement, the surround-type three-dimensional printing device is stably installed and has a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic front view of a surround-type three-dimensional printing device when the hot bed is unfolded according to an embodiment of the present disclosure;

[0027] Figure 2 A schematic front view of a wraparound 3D printing device when the heated bed is folded according to an embodiment of the present disclosure;

[0028] Figure 3 is a schematic top view of the surround-type three-dimensional printing device when the printing mechanism according to an embodiment of the present disclosure is located at a first rotation position;

[0029] Figure 4 is a schematic top view of the surround-type three-dimensional printing device when the printing mechanism according to an embodiment of the present disclosure is located at a second rotation position;

[0030] Figure 5 Schematic diagram of the structure of the mounting base and the heated bed in the embodiment of the present disclosure;

[0031] Figure 6 Schematic diagram of the structure of the mounting base and the heated bed in the embodiment of the present disclosure;

[0032] Figure 7 This is a schematic structural diagram of a mounting base in an embodiment of the present disclosure;

[0033] Figure 8 is a schematic bottom view of a mounting base according to an embodiment of the present disclosure;

[0034] Figure 9 Schematic diagram of the structure of a surround-type three-dimensional printing device according to an embodiment of the present disclosure;

[0035] Figure 10 Schematic diagram of the structure of a surround-type three-dimensional printing device according to an embodiment of the present disclosure;

[0036] Figure 11 is a schematic top view of a printing mechanism in an embodiment of the present disclosure;

[0037] Figure 12 Schematic top view of the printing mechanism in an embodiment of the present disclosure.

[0038] Explanation of the accompanying drawings: 1. Mounting seat; 11. Mounting foot; 12. Mounting seat body; 2. Printing mechanism; 21. Print head; 22. Connecting seat; 23. First connecting arm; 24. Second connecting arm; 3. Hot bed; 31. Bed body; 311. Bed surface; 32. Bed leg; 321. Fixed leg; 322. Support leg; 4. Rotating mechanism; 41. Annular guide rail; 42. Stepping motor; 421. Output end; 43. Synchronous belt; 44. Synchronous wheel; 45. Ring groove bearing; 5. Box body; 501. Outer peripheral wall; 6. Constant torque hinge; 100. Surrounding three-dimensional printing device. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present disclosure more obvious and easy to understand, the specific implementation methods of the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present disclosure. However, the embodiments of the present disclosure can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the connotations of the embodiments of the present disclosure. Therefore, the embodiments of the present disclosure are not limited by the specific examples of the embodiments disclosed below.

[0040] In the description of the embodiments of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the embodiments of the present disclosure.

[0041] In the embodiments of the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0042] Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. For example, a first heated bed may also be referred to as a second heated bed, and a second heated bed may also be referred to as a first heated bed. In the description of the embodiments of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a flexible connection, or a rigid connection along at least one direction; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or directly connected with the presence of an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. The terms "installed", "set", "fixed", etc. can be broadly understood as connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0044] As used herein, the terms "layer" and "region" refer to a portion of a material that includes an area with a certain thickness. A layer can extend horizontally, vertically and / or along a tapered surface. A layer can be an area of ​​a uniform or non-uniform continuous structure, and its thickness perpendicular to the extension direction may not be greater than the thickness of the continuous structure. A layer can include multiple layers, which can be stacked layers or discretely extended layers. The shapes of the various regions and layers in the drawings and their relative sizes and positional relationships are only exemplary and may deviate from the actual shapes due to manufacturing tolerances or technical limitations, and the design can be adjusted according to actual needs.

[0045] refer to Figure 1 , Figure 1 FIG. 1 shows a wraparound 3D printing apparatus according to an embodiment of the present disclosure. In an exemplary embodiment, the wraparound 3D printing apparatus 100 includes a mounting base 1, a printing mechanism 2, and a heated bed 3. The number of heated beds 3 can be at least two, or three, four, or other numbers.

[0046] Combine Figures 2 to 4 As shown, in some embodiments, the mounting plane of the mounting base 1 can be parallel to the XY plane, the mounting base 1 defines a first rotation axis, and the first rotation axis can be parallel to the Z axis. The mounting base 1 can be mounted on a bottom surface or a table, and the Z axis can be a vertical direction.

[0047] refer to Figure 3 and Figure 4 The printing mechanism 2 is rotatably connected to the mounting base 1 around a first rotation axis. The printing mechanism 2 can rotate along the XY plane relative to the mounting base 1 and can stay at different rotation positions.

[0048] Multiple heated beds 3 are disposed on the mounting base 1 around a first rotation axis. The multiple heated beds 3 can be positioned coaxially with the printing mechanism 2, and the printing mechanism 2 can still rotate to different positions of the heated bed 3. For example, the multiple heated beds 3 are coaxially disposed with the printing mechanism 2, ensuring a balanced structure and stable operation of the wraparound 3D printing apparatus 100.

[0049] refer to Figure 1 and Figure 2 As shown, each of the plurality of heating beds 3 is rotatably connected to the mounting base 1 , so that the heating bed 3 can be expanded and retracted relative to the mounting base 1 along the radial direction of the first rotation axis.

[0050] In some embodiments, the second rotation axis of the hot bed 3 relative to the mounting base 1 is perpendicular to the first rotation axis and perpendicular to the radial direction, and multiple hot beds 3 can be simply and orderly deployed and retracted. The hot bed 3 can be flipped up or down, and the hot bed 3 can be at least partially stored in the mounting base 1. Figure 2 As shown, for example, the bed surface 311 ( Figure 5) radially toward the mounting base 1, the hot bed 3 flips upward when folded, which helps to set a lower mounting base 1, which is stable and convenient for taking out the printed product.

[0051] like Figure 4 As shown, the printing mechanism 2 is in the second rotational position, corresponding to a hot bed 3. The printing mechanism 2 can perform 3D printing on this hot bed 3. After printing on one hot bed 3 is completed, the printing mechanism 2 can be rotated relative to the mounting base 1 so that the printing mechanism 2 corresponds to another hot bed 3 and another 3D printing cycle can be started. The product printed on the previous hot bed 3 can be removed. For example, the number of printing mechanisms 2 is less than the number of hot beds 3.

[0052] The wraparound 3D printing device 100 of the disclosed embodiment is small in size overall, small in size when folded up, and occupies a small area. In addition, it can be easily transferred and transported. The mounting base 1 can be designed to be smaller, but can support a larger printing area. The wraparound 3D printing device 100 has a larger printing range, which in turn helps to improve the overall printing efficiency. The wraparound 3D printing device 100 is light in weight and stable during operation. The wraparound 3D printing device 100 can print in multiple directions within the vertical plane of the first rotation axis.

[0053] For example, two adjacent hot beds 3 are spaced apart. Figure 3 As shown, when the printing mechanism 2 is in the first rotational position, its projection on the XY plane can be located between the two heated beds 3. In some embodiments, the printing mechanism 2 in the first rotational position can avoid the rotating heated bed 3, can avoid the printed product, or can be an intermediate state when the printing mechanism 2 switches between different heated beds 3.

[0054] In some embodiments, the mounting base 1 includes three mounting feet 11 evenly distributed around the first rotation axis; the multiple heated beds 3 are three evenly distributed heated beds 3, and the three heated beds 3 and the three mounting feet 11 are alternately arranged around the first rotation axis. The surround-type three-dimensional printing device 100 is stably installed and has a compact structure.

[0055] The mounting base 1 includes a mounting base body 12. The mounting feet 11 are connected to the mounting base body 12 and can support the mounting base body 12 away from the mounting surface. The heated bed 3 is rotatably connected to the mounting base body 12. For example, the surround-type 3D printing device 100 also includes a housing 5 rotatably connected to the mounting base body 12.

[0056] In some embodiments, the housing 5 of the wraparound 3D printing device 100 is rotatably connected to the mounting base 1. The printing mechanism 2 is disposed within the housing 5 and is indirectly rotatably connected to the mounting base 1. The outer wall 501 of the housing 5 is shaped to match the heated bed 3 in its collapsed state. The housing 5 accommodates and protects the printing mechanism 2, and its compatibility with the heated bed 3 makes the wraparound 3D printing device 100 compact and space-saving.

[0057] refer to Figure 5 and Figure 6 In some embodiments, the heated bed 3 is rotatably connected to the mounting base 1 via a constant torque hinge 6. Figure 2 and Figure 5 , the constant torque hinge 6 is configured as an inset-outset type relative to the heated bed 3 in the retracted state; Figure 6 The constant torque hinge 6 is used to limit the hot bed 3 to keep it unfolded. By using the constant torque hinge 6 configured in this way, the hot bed 3 can be ensured to move stably when switching states, and the wraparound 3D printing device 100 has a long service life.

[0058] like Figure 7 and Figure 8 As shown, in some embodiments, the surround-type 3D printing device 100 includes a rotating mechanism 4 to drive the rotation of the printing mechanism 2 relative to the mounting base 1. The flipping of the heated bed 3 can be controlled manually or automatically by a driver or the like.

[0059] Exemplarily, the wraparound 3D printing device 100 includes an annular guide rail 41 disposed about a first rotation axis. The printing mechanism 2 or housing 5 is rotatably connected to the mounting base 1 about the first rotation axis via the annular guide rail 41. The provision of the annular guide rail 41 ensures stable rotation of the printing mechanism 2 relative to the mounting base 1.

[0060] In some embodiments, reference Figure 7 and Figure 6 The annular guide rail 41 is connected to the mounting base 1, for example, fixed to the bottom plate of the mounting base 1. The housing 5 is fixedly and slidably connected to the annular groove bearing 45 of the annular guide rail 41. The annular guide rail 41 can stably and precisely limit the rotation of the housing 5. In addition, the surround-type 3D printing device 100 is low-cost.

[0061] In some embodiments, the surround-type 3D printing device 100 further includes a stepper motor 42, a synchronous belt 43, and a synchronous pulley 44. The output end 421 of the stepper motor 42, the synchronous belt 43, and the synchronous pulley 44 are located within the inner ring of the annular guide rail 41, facilitating a compact structure at the mounting base 1. For example, the synchronous pulley 44 is secured to the housing 5 and coaxially arranged with the annular guide rail 41 to ensure smooth rotation of the housing 5. The stepper motor 42 is connected to the synchronous pulley 44 via the synchronous belt 43. The stepper motor 42 and the synchronous belt 43 implement vector control, resulting in high efficiency and low cost.

[0062] For example, the rotating mechanism 4 can utilize gear transmission to realize the rotation control of the box 5 and the printing mechanism 2 .

[0063] refer to Figures 9 to 12 In some embodiments, the printing mechanism 2 includes a print head 21, which can be extended and retracted radially along the first rotation axis so that the travel of the print head 21 passes through the hot bed 3 in the expanded state, ensuring that the printing mechanism 2 can effectively print when it rotates to correspond to different hot beds 3.

[0064] In some embodiments, the printing mechanism 2 further includes a connecting base 22, a first connecting arm 23, and a second connecting arm 24, which are rotatably connected in sequence. The connecting base 22 is rotatably connected to the mounting base 1 about a first rotation axis. The rotation axes of the first connecting arm 23 relative to the connecting base 22 and the second connecting arm 24 relative to the first connecting arm 23 are parallel to the first rotation axis. For example, the rotation axes are not coaxial. The second connecting arm 24 is connected to the print head 21. The printing mechanism 2 has a simple structure; its cantilevered configuration facilitates folding, reducing the horizontal footprint of the printing mechanism 2 when folded.

[0065] Exemplarily, the print head 21 is rotatably connected to the second connecting arm 24 , and the rotation axis may be parallel to the XY plane, which is conducive to achieving a more detailed and accurate printing effect.

[0066] In some embodiments, the connection base 22 is slidably connected to the mounting base 1 along the first rotation axis, specifically, it can be slidably connected to the box 5 and indirectly connected to the mounting base 1. The connection base 22 can effectively control the lifting and lowering of the print head 21, which is conducive to stable three-dimensional printing.

[0067] refer to Figure 9 and Figure 10 In some embodiments, the heated bed 3 includes a bed body 31 and bed legs 32. The bed legs 32 are used to support the bed body 31 when the heated bed 3 is in an unfolded state. The unfolded state of the heated bed 3 is more stable. The heated bed 3 may include at least one bed leg 32.

[0068] The bed legs 32 may correspond to or be located near the middle of the bed body 31. The bed legs 32 and the mounting feet 11 may be inclined inward from bottom to top. The surround-type 3D printing device 100 is installed stably and firmly.

[0069] Illustratively, the bed legs 32 include radially adjustable legs 322 relative to the bed 31, ensuring that the wraparound 3D printing apparatus 100 occupies minimal space when folded. The legs 322 are rotatably connected to the bed 31, with the rotation axis perpendicular to the first rotation axis and perpendicular to the radial direction. The legs 322 can be cylindrical or plate-shaped.

[0070] The bed legs 32 may also include fixed legs 321 that can be fixed to the bed frame 31 to enhance the connection strength. The fixed legs 321 may be open radially inwardly along the first rotation axis to allow for the retracted legs 322 to be accommodated, while the outer sides of the fixed legs 321 can restrain the legs 322, enhancing their structural strength.

[0071] The technical features of the embodiments disclosed above can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] In the embodiments disclosed above, unless otherwise expressly specified and limited, the order of execution of the steps is not limited. For example, the steps may be executed in parallel or in a different order. The sub-steps of each step may also be executed in an interleaved manner. The above-mentioned various forms of processes may be used, and steps may be reordered, added, or deleted. As long as the desired results of the technical solutions provided in the embodiments of the present disclosure can be achieved, this document does not impose any restrictions thereon.

[0073] The embodiments disclosed above merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent protection of the present application. It should be noted that a person skilled in the art could make several variations and improvements without departing from the concept of the present application, all of which fall within the scope of the patent protection claimed by the present application. Therefore, the scope of the patent protection of the present application shall be subject to the appended claims.

Claims

1. A surround-type three-dimensional printing device, characterized in that: include: Mounting seat; A printing mechanism, rotatably connected to the mounting base about a first rotation axis; as well as A plurality of heating beds are arranged on the mounting base around the first rotation axis, and each of the plurality of heating beds is rotatably connected to the mounting base, so that the heating beds can be expanded and retracted relative to the mounting base along the radial direction of the first rotation axis.

2. The surround-type three-dimensional printing device according to claim 1, characterized in that: The printing mechanism includes a printing head, and the printing head is capable of extending and retracting in the radial direction of the first rotation axis so that the stroke of the printing head passes through the heated bed in the expanded state.

3. The surround-type three-dimensional printing device according to claim 2, characterized in that: The printing mechanism also includes a connecting base, a first connecting arm and a second connecting arm that are connected to each other in rotation in sequence. The connecting base is connected to the mounting base by rotation around the first rotation axis. The rotation axis of the first connecting arm relative to the connecting base and the rotation axis of the second connecting arm relative to the first connecting arm are respectively parallel to the first rotation axis. The second connecting arm is connected to the print head.

4. The surround-type three-dimensional printing device according to claim 3, characterized in that: The connecting seat is slidably connected to the mounting seat along the first rotation axis.

5. The surround-type three-dimensional printing device according to claim 1, characterized in that: The device further comprises an annular guide rail and a box body, wherein the annular guide rail is arranged around the first rotation axis; the box body is connected to the mounting seat by rotating around the first rotation axis via the annular guide rail, and the printing mechanism is arranged in the box body; The shape of the outer peripheral wall of the box body matches the heated bed in the folded state.

6. The surround-type three-dimensional printing device according to claim 5, characterized in that: Also includes: A stepper motor, a synchronous belt and a synchronous wheel, wherein the output end of the stepper motor, the synchronous belt and the synchronous wheel are located on the inner ring of the annular guide rail; The synchronous wheel is fixed to the box body, the synchronous wheel is coaxially arranged with the annular guide rail, and the stepping motor is connected to the synchronous wheel through the synchronous belt transmission.

7. The surround-type three-dimensional printing device according to claim 1, characterized in that: The second rotation axis of the heated bed relative to the mounting seat is perpendicular to the first rotation axis and perpendicular to the radial direction; the bed surface of the heated bed in the folded state faces the mounting seat along the radial direction.

8. The surround-type three-dimensional printing device according to claim 7, characterized in that: The heated bed includes a bed body and bed legs. The bed legs are used to support the bed body when the heated bed is in an unfolded state. The bed legs include legs that are adjustable along the radial direction relative to the bed body.

9. The surround-type three-dimensional printing device according to claim 1, characterized in that: The heated bed is rotatably connected to the mounting base via a constant torque hinge; the constant torque hinge is configured as an inset-outset type relative to the heated bed in a retracted state, and the constant torque hinge is used to limit the heated bed to keep it unfolded.

10. The surround-type three-dimensional printing device according to any one of claims 1 to 9, characterized in that: The mounting base includes three mounting feet evenly distributed around the first rotation axis; The multiple heating beds are three evenly distributed heating beds, and the three heating beds and the three mounting feet are alternately arranged around the first rotation axis.

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