Printing bed structure for 3D printing equipment

Abstract

The utility model relates to a printing bed structure for 3D printing equipment, which belongs to the field of 3D printing equipment and comprises a printing bed, and the printing bed comprises a mounting frame and a supporting platform mounted on the mounting frame. The supporting platform comprises a left supporting plate and a right supporting plate which are arranged left and right, a bending space is formed between the left supporting plate and the right supporting plate, the left supporting plate and the right supporting plate are horizontally arranged, the upper surfaces of the left supporting plate and the right supporting plate are located on the same horizontal plane to form a mounting surface, and a flat-plate-shaped aluminum plate is fixedly attached to the mounting surface; the mounting frame comprises a left connecting arm fixedly connected with the bottom of the left supporting plate and a right connecting arm fixedly connected with the bottom of the right supporting plate, and the left connecting arm and the right connecting arm are rotationally connected through a rotary connecting structure; the mounting base is used for mounting the printing bed, and the printing bed is mounted on the mounting base through a mounting frame. According to the utility model, the condition that the printed piece is damaged due to removal of the printed piece can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printing equipment field, especially a printing bed structure for 3D printing equipment. BACKGROUND

[0002] 3D printing equipment is a kind of machine that is applied cumulative manufacturing technology, i.e. rapid prototyping technology, which is based on digital model file, uses special wax material, powder-like metal or plastic and other adhesive materials, and manufactures three-dimensional object by printing adhesive material layer by layer on the printing bed.

[0003] Now, in order to improve the speed of precious metal jewelry manufacturing process, 3D printing equipment has been applied in the lost wax casting process of jewelry manufacturing process, and the special wax material is used to manufacture jewelry mold, compared with the traditional lost wax casting process, the time consumed in the whole process is greatly reduced. However, since the volume of jewelry is generally small, the volume of jewelry mold printing piece is also small, and the process of disassembling the printing piece from the printing bed is difficult, because the surface and corner of small printing piece are small and narrow, it is difficult to accurately enter these small areas when using scraper or other tools, and any tool that is too large or used improperly may cause the printing piece to break or the bed surface to be damaged, and the ratio of surface area to volume of small printing piece is usually high, which means that the outer layer material cools down quickly, resulting in rapid temperature drop, and the material will shrink during the cooling process, when the outer layer cools down quickly and the internal material temperature is still high, the internal and external shrinkage is uneven, resulting in warping or deformation, and warping deformation may cause the adhesion between the edge of printing piece and the bed surface to increase, so it needs more force to pry or remove the printing piece, so it is easy to damage the printing piece during the process of removing the printing piece.

[0004] Therefore, the utility model provides a printing bed structure for 3D printing equipment, which optimizes the structure of the printing bed to make the disassembly process of small printing piece simpler and more labor-saving. UTILITY MODEL CONTENT

[0005] Therefore, it is necessary to provide a printing bed structure for a 3D printing device, comprising a printing bed, the printing bed comprising a mounting frame and a support platform mounted on the mounting frame; the support platform comprises left and right support plates arranged left and right, and a curved space is formed between the left and right support plates; the left and right support plates are both horizontally arranged, and the upper surfaces of the left and right support plates are located on the same horizontal plane to form a mounting surface, and a flat aluminum plate is fixedly attached to the mounting surface; the mounting frame comprises a left connecting arm fixedly connected to the bottom of the left support plate and a right connecting arm fixedly connected to the bottom of the right support plate, and the left connecting arm and the right connecting arm are rotatably connected through a rotating connection structure; and the printing bed is mounted on the mounting base through the mounting frame.

[0006] In the utility model, the mounting base is used for being fixedly mounted on the 3D printing device, and is used for mounting the printing bed on the 3D printing device, and specifically, the printing bed is mounted on the mounting base through the mounting frame on the printing bed.

[0007] In the utility model, the left and right support plates are fixedly connected to the left and right connecting arms respectively, and the left and right connecting arms are rotatably connected, so that after the printing of the printed part on the aluminum plate is completed, the left and right support plates can be relatively rotated by relatively rotating the left and right connecting arms, so that the aluminum plate region with the printed part adhered is curved, and when the aluminum plate is slightly curved, the deformation of the curved aluminum plate will gradually reduce the contact area between the aluminum plate and the printed part, and the printed part will fall off from the aluminum plate from the edge, so that the adhesion is weakened, and the printed part can be easily removed from the aluminum plate, and the damage of the printed part caused by the removal of the printed part can be avoided.

[0008] In addition, during the operation of the 3D printing device, for the large-sized jewelry mold, since the removal process is simpler than that of the small-sized printed part, the printing can be performed on the aluminum plate region above the left and right support plates, that is, the utility model can also be applied to the printing of the large-sized jewelry mold, and the aluminum plate does not need to be curved during the printing operation of the large-sized jewelry mold.

[0009] Further, the rotating connection structure comprises a cylindrical mounting rod located below the support platform and arranged along the front-rear direction; one end of the left connecting arm towards the mounting rod is fixedly connected with the mounting rod, and one end of the right connecting arm towards the mounting rod is fixedly provided with one or more sleeves, which are sleeved on the mounting rod and rotatably matched with the mounting rod.

[0010] In the utility model, the right connecting arm is rotatably sleeved on the mounting rod through the sleeve, so that the rotatable connection of the right connecting arm and the left connecting arm is realized; when the right connecting arm rotates relative to the left connecting arm, the right support plate fixed on the right connecting arm will rotate relative to the left support plate with the axis of the mounting shaft as the axis; at this time, the aluminum plate part between the left support plate and the right support plate will be bent; preferably, the left support plate and the right support plate are symmetrically arranged relative to the vertical plane where the axis of the mounting rod is located, and the left connecting arm and the right connecting arm are also symmetrically arranged relative to the vertical plane where the axis of the mounting rod is located, so as to ensure that the aluminum plate is uniformly stressed during bending.

[0011] Further, the surface of the mounting rod is provided with a limiting strip along the length direction thereof; the inner side wall of the sleeve is provided with an accommodation groove for accommodating the limiting strip, the two ends of the accommodation groove along the circumferential direction of the sleeve form a first abutting wall and a second abutting wall for abutting with the limiting strip, the second abutting wall is located in the downstream direction of the clockwise direction of the first abutting wall, and the first abutting wall abuts with the limiting strip.

[0012] In the utility model, the limiting strip on the mounting rod is located in the accommodation groove of the sleeve, so that the abutment of the two ends of the accommodation groove with the limiting strip can limit the rotation angle of the sleeve relative to the mounting rod, so as to limit the rotation angle of the right support plate relative to the left support plate; for example, the rotation angle of the sleeve relative to the mounting rod is limited within 5°, so that the plastic deformation of the aluminum plate due to excessive bending can be avoided.

[0013] In the utility model, when the left support plate and the right support plate are located in the same plane, the first abutting wall abuts with the limiting strip; at this time, the limiting strip can support the sleeve to maintain the horizontal of the left support plate and the right support plate.

[0014] Further, the right connecting arm is further provided with a mounting ring corresponding to the mounting rod, and the mounting ring is rotatably arranged on the mounting rod through a bearing structure.

[0015] In the utility model, the mounting ring on the right connecting arm is rotatably connected with the mounting rod through the bearing structure, so that the strength of the rotating connection structure of the right connecting arm and the mounting rod can be further strengthened, the relative displacement in other directions of the right support plate relative to the left support plate when the right support plate rotates relative to the left support plate can be avoided, and the stress uniformity of the bent part of the aluminum plate can be ensured.

[0016] Further, the left connecting arm and the right connecting arm are both flat plate structures, lower surfaces of the left connecting arm and the right connecting arm are both fixedly provided with at least one vertically arranged connecting plate, the connecting plate is arranged vertically in the left-right direction, a lower end of the connecting plate is fixedly provided with a plug rod, the plug rod is arranged along the front-rear direction, and the maximum width of the plug rod is greater than the thickness of the connecting plate; the mounting base is provided with a first connecting seat corresponding to the plug rod, a first plug slot matched with the plug rod is formed in the first connecting seat, the first plug slot extends out of the first connecting seat, and a containing hole for containing the connecting plate is formed in the top end of the first connecting seat and communicated with the first plug slot, the plug rod is inserted into the first plug slot, and the outer surface of the plug rod is arranged in abutment with the inner surface of the first plug slot.

[0017] In the utility model, the upper end of the left connecting arm and the right connecting arm is fixedly connected with the left supporting plate and the right supporting plate respectively, and the left connecting arm and the right connecting arm are connected with the mounting base in a form that the plug rod on the left connecting arm and the right connecting arm is inserted into the first plug slot, so that the printing bed can be detached from the mounting base after printing is completed, and the printing bed can be placed aside for cooling to quickly produce the next printing piece. Preferably, the lower end of the plug rod arranged on the connecting plate is located on the same horizontal plane, so that the printing bed can be stably placed through the plug rod after being detached from the mounting base. In addition, the same connecting plate and plug rod can be arranged on the lower surface of the left supporting plate and the right supporting plate to further strengthen the fixing and supporting effect of the mounting base on the left supporting plate and the right supporting plate. In addition, when the second abutting wall rotates to abut against the limiting strip, the lower end of the plug rod on the connecting plate is located on the same horizontal plane, so that the aluminum plate can be slowly bent through its own weight after the printing bed is detached and placed on the horizontal placement surface, thereby achieving the purpose of removing the printing piece.

[0018] In the utility model, the inner surface of the first plug slot and the outer surface of the plug rod are in abutment with each other, so that the first plug slot can fix the plug rod and the left connecting arm and the right connecting arm connected with the plug rod after the plug rod is inserted into the first plug slot, thereby achieving the purpose of supporting the left supporting plate and the right supporting plate and keeping the horizontal state of the left supporting plate and the right supporting plate. When the plug rod is pulled out of the first plug slot, the left connecting arm and the right connecting arm can rotate relatively, and the aluminum plate can be bent at this time.

[0019] Further, the aluminum plate is formed with a blank area on the left side of the left support plate and the right side of the right support plate, the left support plate and the right support plate are formed with the blank area, and the part formed with the blank area is formed with a plug-in section, the mounting base is formed with a second connecting seat corresponding to the plug-in section, the second connecting seat is formed with a second slot corresponding to the plug-in section, the second slot extends out of the second connecting seat, the plug-in section is inserted into the second slot, and the outer surface of the plug-in section is attached to the inner surface of the second slot.

[0020] In the utility model, when the printing bed is installed on the mounting base, the plug-in rod is inserted into the first slot, and the left support plate and the right support plate are also inserted into the second slot, the second slot can support the edges of the left support plate and the right support plate, and the fixing and supporting effect of the mounting base on the left support plate and the right support plate can be further enhanced.

[0021] Further, the mounting base further comprises a base, and the first connecting seat and the second connecting seat are fixedly arranged on the base.

[0022] In the utility model, the base is used as the mounting structure of the mounting base, and can be fixedly installed on the 3D printing equipment through a welding or bolt connection mounting structure.

[0023] The principles and effects of the utility model will be further described in combination with the above technical scheme and the drawings:

[0024] In the utility model, the left support plate and the right support plate are fixed on the left connecting arm and the right connecting arm, and the left connecting arm and the right connecting arm are rotatably connected, so that after the printing of the printing piece on the aluminum plate is completed, the left support plate and the right support plate can be relatively rotated by relatively rotating the left connecting arm and the right connecting arm, so that the aluminum plate region adhering to the printing piece is bent, and when the aluminum plate is slightly bent, the deformation of the aluminum plate bending will gradually reduce the contact area between the aluminum plate and the printing piece, and the printing piece will fall off from the aluminum plate from the edge, so that the adhesion is weakened, and the printing piece can be easily removed from the aluminum plate, and the situation that the printing piece is damaged due to removal of the printing piece can be avoided. DRAWINGS

[0025] Figure 1 It is a sectional structure schematic view of the printing bed of the embodiment of the utility model;

[0026] Figure 2 It is a sectional structure schematic view of the printing bed of the embodiment of the utility model; Figure 1

[0027] Figure 3 It is a structure schematic view of the printing bed of the embodiment of the utility model installed on the mounting base.​

[0028] Figure 4 The sectional structure diagram of the bent aluminum plate on the printing bed is shown in the embodiment of the utility model.

[0029] Figure 5 For Figure 4 The local enlarged view.

[0030] The drawings

[0031] 11-left connecting arm, 12-right connecting arm, 121-loop, 1211-receiving groove, 13-connecting plate, 14-inserting rod, 15-mounting rod, 151-limiting strip, 21-left supporting plate, 22-right supporting plate, 23-bending space, 24-aluminum plate, 31-base, 32-first connecting seat, 33-second connecting seat. DETAILED DESCRIPTION

[0032] In order to facilitate those skilled in the art to understand, the utility model will be described in further detail below in combination with the drawings and embodiments:

[0033] As Figures 1-5 A printing bed structure for a 3D printing device, comprising a printing bed, the printing bed comprising a mounting frame and a supporting platform mounted on the mounting frame; the supporting platform comprises left and right supporting plates 21 and 22, a bending space 23 is formed between the left and right supporting plates 21 and 22, the left and right supporting plates 21 and 22 are both horizontally arranged, the upper surfaces of the left and right supporting plates 21 and 22 are located on the same horizontal plane to form a mounting surface, and an aluminum plate 24 in the form of a flat plate is fixedly attached to the mounting surface; the mounting frame comprises a left connecting arm 11 fixedly connected to the bottom of the left supporting plate 21 and a right connecting arm 12 fixedly connected to the bottom of the right supporting plate 22, and the left and right connecting arms 11 and 12 are rotatably connected to each other through a rotating connection structure; the utility model also comprises a mounting base for mounting the printing bed, and the printing bed is mounted on the mounting base through the mounting frame.

[0034] In the utility model, the mounting base is used for being fixedly mounted on a 3D printing device for use, and is also used for mounting the printing bed to mount the printing bed on the 3D printing device, specifically, the printing bed is mounted on the mounting base through the mounting frame thereon. The aluminum plate 24 is flatly attached to the left and right supporting plates 21 and 22 and is in the form of a plane, and the upper surface thereof is used for attaching a printed part.

[0035] In the utility model, left support plate 21 and right support plate 22 are fixed on left connecting arm 11 and right connecting arm 12 respectively, and left connecting arm 11 and right connecting arm 12 are rotatably connected with each other, so after printing on aluminum plate 24 is completed, when the printed matter cools down, left connecting arm 11 and right connecting arm 12 can be relatively rotated, left support plate 21 and right support plate 22 are relatively rotated, the region of aluminum plate 24 with the printed matter is bent, when aluminum plate 24 is slightly bent, the contact area between aluminum plate 24 and the printed matter is gradually reduced, the printed matter is separated from aluminum plate 24 from the edge, so that the adhesion is weakened, at this moment, the printed matter can be easily separated from aluminum plate 24, and the situation that the printed matter is damaged due to removal can be avoided.

[0036] In addition, during the working process of the 3D printing equipment, for the jewelry mold with large size, since the removal process is simpler than the printed matter with small size, the printing can be carried out on the region of aluminum plate 24 above left support plate 21 and right support plate 22, that is, the utility model is also applicable to the printing of the jewelry mold with large size, and the bending operation of aluminum plate 24 is not needed during the printing operation of the jewelry mold with large size.

[0037] In one embodiment, the rotating connection structure comprises a cylindrical mounting rod 15, which is arranged below the support platform and along the front-back direction; one end of the left connecting arm 11 towards the mounting rod 15 is fixedly connected with the mounting rod 15, and one end of the right connecting arm 12 towards the mounting rod 15 is fixedly provided with one or more sleeves 121, which are sleeved on the mounting rod 15 and rotatably matched with the mounting rod 15.

[0038] In this embodiment, the right connecting arm 12 is rotatably sleeved on the mounting rod 15 through the sleeve 121, so as to realize the rotatable connection of the right connecting arm 12 and the left connecting arm 11, when the right connecting arm 12 rotates relative to the left connecting arm 11, the right support plate 22 fixed on the right connecting arm 12 rotates relative to the left support plate 21 about the axis of the mounting shaft, and at this moment, the part of the aluminum plate 24 between the left support plate 21 and the right support plate 22 is bent. Preferably, the left support plate 21 and the right support plate 22 are symmetrically arranged relative to the vertical plane where the axis of the mounting rod 15 is located, and the left connecting arm 11 and the right connecting arm 12 are also symmetrically arranged relative to the vertical plane where the axis of the mounting rod 15 is located, so as to ensure that the aluminum plate 24 is uniformly stressed during the bending process.

[0039] In one embodiment, the surface of the mounting rod 15 is provided with a limiting strip 151 along the length direction thereof, the inner side wall of the sleeve ring 121 is provided with a receiving groove 1211 for accommodating the limiting strip 151, the two ends of the receiving groove 1211 along the circumferential direction of the sleeve ring 121 are formed with a first abutting wall and a second abutting wall for abutting against the limiting strip 151, the second abutting wall is located downstream of the first abutting wall in the clockwise direction, and the first abutting wall abuts against the limiting strip 151.

[0040] In this embodiment, the limiting strip 151 on the mounting rod 15 is located in the receiving groove 1211 of the sleeve ring 121, therefore, the abutment of the two ends of the receiving groove 1211 and the limiting strip 151 can limit the rotation angle of the sleeve ring 121 relative to the mounting rod 15, so as to limit the rotation angle of the right support plate 22 relative to the left support plate 21, for example, the rotation angle of the sleeve ring 121 relative to the mounting rod 15 is limited within 5°, which can avoid the plastic deformation of the aluminum plate 24 due to excessive bending.

[0041] In this embodiment, when the left support plate 21 and the right support plate 22 are located in the same plane, the first abutting wall abuts against the limiting strip 151, at this time, the limiting strip 151 can support the sleeve ring 121 to maintain the horizontal state of the left support plate 21 and the right support plate 22.

[0042] In one embodiment, the right connecting arm 12 is further provided with a mounting ring corresponding to the mounting rod 15, and the mounting ring is rotatably arranged on the mounting rod 15 through a bearing structure.

[0043] In this embodiment, the mounting ring on the right connecting arm 12 is rotatably connected with the mounting rod 15 through a bearing structure, which can further strengthen the strength of the rotation connection structure of the right connecting arm 12 and the mounting rod 15, avoid the relative displacement in other directions when the right support plate 22 rotates relative to the left support plate 21, and ensure the uniform stress of the bent part of the aluminum plate 24.

[0044] In one embodiment, the left connecting arm 11 and the right connecting arm 12 are both flat structures, and the lower surface of the left connecting arm 11 and the right connecting arm 12 is fixedly provided with at least one vertically arranged connecting plate 13, the connecting plate 13 is arranged vertically in the left-right direction, and the lower end of the connecting plate 13 is fixedly provided with a plug rod 14 arranged in the front-back direction, the maximum width of the plug rod 14 is greater than the thickness of the connecting plate 13; the mounting base is provided with a first connecting seat 32 corresponding to the plug rod 14, a first insertion slot matched with the plug rod 14 is formed in the first connecting seat 32, the first insertion slot extends out of the first connecting seat 32, and the top end of the first connecting seat 32 is provided with a receiving hole communicated with the first insertion slot and used for accommodating the connecting plate 13, the plug rod 14 is inserted into the first insertion slot, and the outer surface of the plug rod 14 is arranged in close contact with the inner surface of the first insertion slot.

[0045] In this embodiment, the upper end of the left connecting arm 11 and the right connecting arm 12 is fixedly connected with the left supporting plate 21 and the right supporting plate 22 respectively, and the left connecting arm 11 and the right connecting arm 12 are connected with the mounting base in a detachable manner by inserting the plug rod 14 on the left connecting arm 11 and the right connecting arm 12 into the first insertion slot, so that the printing bed can be detached from the mounting base after printing is completed, and the printing bed can be placed aside for cooling to quickly produce the next printing piece. Preferably, the lower end of the plug rod 14 arranged on the connecting plate 13 is located on the same horizontal plane, so that the printing bed can be stably placed by the plug rod 14 after being detached from the mounting base. In addition, the same connecting plate 13 and plug rod 14 can be arranged on the lower surface of the left supporting plate 21 and the right supporting plate 22 to further strengthen the fixing and supporting effect of the mounting base on the left supporting plate 21 and the right supporting plate 22. In addition, when the second abutting wall rotates to abut against the limiting strip 151, the lower end of the plug rod 14 on the connecting plate 13 is located on the same horizontal plane, so that the aluminum plate 24 can be slowly bent by its own weight after the printing bed is placed on the horizontal placement surface, achieving the purpose of removing the printing piece.

[0046] In this embodiment, the inner surface of the first insertion slot and the outer surface of the plug rod 14 are in close contact with each other, so that the first insertion slot can fix the plug rod 14 and the left connecting arm 11 and the right connecting arm 12 connected with the plug rod 14 after the plug rod 14 is inserted into the first insertion slot, achieving the purpose of supporting the left supporting plate 21 and the right supporting plate 22 and keeping the horizontal state of the left supporting plate 21 and the right supporting plate 22, and the left connecting arm 11 and the right connecting arm 12 can be relatively rotated after the plug rod 14 is pulled out of the first insertion slot. At this time, the aluminum plate 24 can be bent.

[0047] In one embodiment, the aluminum plate 24 is formed with a blank area on the left side of the left support plate 21 and on the right side of the right support plate 22, the left support plate 21 and the right support plate 22 are formed with a blank area, and the mounting base is formed with a second connecting seat 33 corresponding to the insertion section, the second connecting seat 33 is formed with a second insertion slot corresponding to the insertion section, the second insertion slot extends out of the second connecting seat 33, the insertion section is inserted into the second insertion slot, and the outer surface of the insertion section is attached to the inner surface of the second insertion slot.

[0048] In this embodiment, when the printing bed is installed on the mounting base, the insertion rod 14 is inserted into the first insertion slot, and the left support plate 21 and the right support plate 22 are also inserted into the second insertion slot, the second insertion slot can support the edges of the left support plate 21 and the right support plate 22, and can further enhance the fixing and supporting effect of the mounting base on the left support plate 21 and the right support plate 22. The first insertion slot fixes the insertion rod 14, and the second insertion slot fixes the left support plate 21 and the right support plate 22, which can force the left support plate 21 and the right support plate 22 to remain horizontal, and when the left support plate 21 and the right support plate 22 remain horizontal, the aluminum plate 24 between the left support plate 21 and the right support plate 22 will be pulled to maintain the horizontal state, so even if the aluminum plate 24 is slightly deformed due to frequent bending, the utility model can still maintain the horizontal state of the aluminum plate 24 after the printing bed is installed.

[0049] In one embodiment, the mounting base further comprises a base 31, and the first connecting seat 32 and the second connecting seat 33 are fixedly arranged on the base 31.

[0050] In this embodiment, the base 31 is used as a mounting structure of the mounting base, which can be fixedly installed on the 3D printing equipment by a welding or bolt connection mounting structure.

[0051] The above embodiments only express several embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which are all within the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A print bed structure for a 3D printing device, characterized in that, The application relates to a printing bed, which comprises a mounting frame and a support platform mounted on the mounting frame; the support platform comprises left and right support plates arranged left and right, a curved space is formed between the left and right support plates, the left and right support plates are horizontally arranged, the upper surfaces of the left and right support plates are located on the same horizontal plane to form a mounting surface, and an aluminum plate in the form of a flat plate is fixedly attached to the mounting surface; the mounting frame comprises a left connecting arm fixedly connected with the bottom of the left support plate and a right connecting arm fixedly connected with the bottom of the right support plate, the left connecting arm and the right connecting arm are rotatably connected through a rotating connecting structure, and the printing bed is mounted on a mounting base through the mounting frame.

2. The print bed structure for a 3D printing device of claim 1, wherein, The rotating connecting structure comprises a cylindrical mounting rod, the mounting rod is located below the support platform and is arranged along the front-back direction, one end of the left connecting arm towards the mounting rod is fixedly connected with the mounting rod, and one or more sleeves are fixedly arranged on one end of the right connecting arm towards the mounting rod, the sleeve is sleeved on the mounting rod and is rotatably matched with the mounting rod.

3. The print bed structure for a 3D printing device of claim 2, wherein, The surface of the mounting rod is provided with a limiting strip along the length direction of the mounting rod, the inner side wall of the sleeve is provided with an accommodating groove for accommodating the limiting strip, the two ends of the accommodating groove along the circumferential direction of the sleeve form a first abutting wall and a second abutting wall for abutting with the limiting strip, the second abutting wall is located in the downstream direction of the clockwise direction of the first abutting wall, and the first abutting wall abuts with the limiting strip.

4. The print bed structure for a 3D printing device according to claim 2 or 3, characterized in that, The right connecting arm is further provided with a mounting ring corresponding to the mounting rod, and the mounting ring is rotatably arranged on the mounting rod through a bearing structure.

5. The print bed structure for a 3D printing device of claim 4, wherein, The left and right connecting arms are in the form of flat plate structures, the lower surfaces of the left and right connecting arms are fixedly provided with at least one vertically arranged connecting plate, the connecting plate is arranged vertically along the left-right direction, the lower end of the connecting plate is fixedly provided with an insertion rod, the insertion rod is arranged along the front-back direction, the maximum width of the insertion rod is greater than the thickness of the connecting plate, the mounting base is provided with a first connecting seat corresponding to the insertion rod, a first insertion groove matched with the insertion rod is formed in the first connecting seat, the first insertion groove extends out of the first connecting seat, a receiving hole for accommodating the connecting plate is formed in the top end of the first connecting seat and communicated with the first insertion groove, the insertion rod is inserted into the first insertion groove, and the outer surface of the insertion rod is arranged in abutment with the inner surface of the first insertion groove.

6. The print bed structure for a 3D printing device of claim 5, wherein, The aluminum plate is provided with a blank area on the left side of the left supporting plate and the right side of the right supporting plate, the left supporting plate and the right supporting plate are provided with the blank area, the part of the left supporting plate and the right supporting plate provided with the blank area forms a plug-in section, the mounting base is provided with a second connecting seat corresponding to the plug-in section, the second connecting seat is provided with a second slot corresponding to the plug-in section, the second slot extends out of the second connecting seat, the plug-in section is arranged in the second slot, and the outer surface of the plug-in section is attached to the inner surface of the second slot.

7. The print bed structure for a 3D printing device of claim 6, wherein, The mounting base further comprises a base, and the first connecting seat and the second connecting seat are fixedly arranged on the base.

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