Hot bed structure of 3D printer

Abstract

The utility model discloses a hot bed structure of a 3D printer, and relates to the technical field of 3D printers. The upper part of the shell is provided with a heating plate; a soft magnetic plate is glued on the heating plate; a steel plate is magnetically attracted on the soft magnetic plate; a microcrystalline glass plate is glued on the steel plate; limiting supporting plates extending outwards are arranged at the corners of the upper face of the shell and located below the angle plates, inserting holes corresponding to the inner screw cylinders are formed in the limiting supporting plates in the vertical direction, cylinder bodies corresponding to the inserting holes are arranged below the limiting supporting plates, connecting pieces are movably connected to the cylinder bodies, and the lower portions of the inner screw cylinders are arranged in the connecting pieces in a threaded fit mode. The connecting piece is matched with the inner screw cylinder, so that the angle plate is conveniently limited, the problem of edge warping of the steel plate is solved, meanwhile, the steel plate is pulled from the lower portion through the inner screw cylinder, and the probability that the microcrystalline glass plate is extruded and damaged in the installation process is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of 3D printers, and specifically relates to a hot bed structure of a 3D printer. Background Art

[0002] The 3D printer hot bed is mainly used to heat the workbench, increase the container temperature, and minimize the temperature difference of the filament. When the extruder heats the filament to melt and the workbench cools and shrinks rapidly, the filament can easily fall off the workbench due to shape changes, resulting in printing failure.

[0003] A Chinese patent with publication number CN212764787U discloses a large-scale 3D printer hot bed based on the FDM principle, including: a support member is installed at the four corners of the support frame by fastening screws, and the support screws pass through four mounting holes on the hot bed plate and are fixed to the support member by adjusting nuts; a spring is installed on the support screw, and the spring is located between the support member and the hot bed plate.

[0004] During use of the large-scale 3D printer hot bed based on the FDM principle disclosed in the application, the support parts are arranged on the side of the support frame, and the nut of the support screw is used to limit the hot bed plate to solve the warping problem. This process requires the user to adjust the adjusting nut according to their judgment, which may easily cause the hot bed plate to still have a small warping due to a small adjustment range, or the hot bed plate to warp downward due to a large adjustment range. At this time, the nut of the support screw squeezes the hot bed plate, which may easily cause the high borosilicate glass to break. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a 3D printer hot bed structure.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0007] A 3D printer hot bed structure, comprising a shell, a heating plate is installed on the upper part of the shell, a soft magnetic plate is glued on the heating plate, the lower part of the soft magnetic plate is located in the shell, a steel plate is magnetically attracted on the soft magnetic plate, a microcrystalline glass plate is glued on the steel plate, angle plates are arranged at the corners of the heating plate, and an inner screw barrel is welded under the angle plates;

[0008] The outer shell is provided with a limit support plate extending outward at the corner, the limit support plate is located below the angle plate, the limit support plate is provided with a socket corresponding to the inner screw barrel in the vertical direction, the socket passes through the limit support plate, the inner screw barrel passes through the socket, a cylinder body corresponding to the socket is provided below the limit support plate, a connecting piece is movably connected to the cylinder body, and the lower thread of the inner screw barrel is engaged in the connecting piece.

[0009] Optionally, the thickness of the corner plate is equal to the sum of the thicknesses of the steel plate and the microcrystalline glass plate. A warping groove is provided on the corner plate. A rubber strip is glued in the warping groove. The rubber strip fits the corner of the microcrystalline glass plate. The rubber strip reduces the probability of the corner plate warping up and its edge squeezing the microcrystalline glass plate and causing damage.

[0010] Optionally, first reinforcing ribs are provided on both sides of the angle plate, the first reinforcing ribs are installed on the side of the steel plate, the limiting support plate is located between the two first reinforcing ribs, and the first reinforcing ribs are located on the top of the outer shell. The first reinforcing ribs reduce the probability of bending at the connection between the angle plate and the steel plate.

[0011] Optionally, two second reinforcing ribs are provided on the lower side of the limiting support plate, the second reinforcing ribs are provided on the side of the shell, and the cylinder is installed between the two second reinforcing ribs, so that the load-bearing capacity of the limiting support plate is improved by the second reinforcing ribs.

[0012] Optionally, the connecting part includes an extrusion barrel located in the cylinder body, the lower part of the inner screw barrel is located in the extrusion barrel, a stud is installed at the lower end of the inner wall of the extrusion barrel, the stud thread is engaged in the inner screw barrel, a rubber ring is installed at the upper end of the extrusion barrel, the rubber ring is located on the circumference of the inner screw barrel, the rubber ring is located between the extrusion barrel and the limiting support plate, the lower end of the extrusion barrel is fixedly connected to an extension rod, the lower end of the extension rod is fixedly connected to a knob, the knob is located below the cylinder body, and the rubber ring is used to reduce the probability of wear caused by friction between the rotation of the extrusion barrel and the limiting support plate.

[0013] Optionally, movable grooves and through holes are respectively provided at the upper and lower ends of the cylinder body, the movable groove is connected with the through hole and the plug hole, the extrusion cylinder and the rubber ring are movably fitted in the movable groove, and the extension rod passes through the through hole in the vertical direction. The movable groove cooperates with the limiting support plate to limit the displacement distance of the connecting piece, thereby reducing the probability of losing the connecting piece.

[0014] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0015] By cooperating with the connecting parts and the inner screw barrel, it is convenient to limit the angle plate, thereby solving the problem of warping of the steel plate. At the same time, the steel plate is pulled from the bottom by the inner screw barrel, reducing the probability of the microcrystalline glass plate being squeezed and damaged during installation. The angle plate is limited and supported by the limiting support plate, reducing the need for users to judge and adjust the warping amplitude of the steel plate, reducing the probability of downward warping of the steel plate and the angle plate due to installation, and reducing the probability of loss of the connecting parts through the cylinder.

[0016] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] In the figure:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle;

[0021] Figure 3 This is a schematic cross-sectional structure diagram of an embodiment of the utility model;

[0022] Figure 4 The figure is a schematic diagram of the explosion structure of one embodiment of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] Shell 1, limit support plate 101, jack 102, cylinder 103, movable groove 104, through hole 105, second reinforcing rib 106, heating plate 2, soft magnetic plate 3, steel plate 4, angle plate 401, inner screw cylinder 402, warping groove 403, rubber strip 404, first reinforcing rib 405, microcrystalline glass plate 5, connector 6, extrusion cylinder 601, stud 602, rubber ring 603, extension rod 604, knob 605.

[0025] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0026] The utility model will now be described in further detail with reference to the accompanying drawings.

[0027] See also Figure 1-4 As shown, in this embodiment, a 3D printer hot bed structure is provided, including a shell 1, a heating plate 2 is installed on the upper part of the shell 1, a soft magnetic plate 3 is glued on the heating plate 2, the lower part of the soft magnetic plate 3 is located in the shell 1, a steel plate 4 is magnetically attracted on the soft magnetic plate 3, a microcrystalline glass plate 5 is glued on the steel plate 4, and angle plates 401 are provided at the corners of the sides of the heating plate 2, and an inner screw barrel 402 is welded under the angle plate 401;

[0028] The outer shell 1 is provided with a limit support plate 101 extending outward at the corners. The limit support plate 101 is located below the angle plate 401. The limit support plate 101 is provided with a socket 102 corresponding to the inner screw barrel 402 in the vertical direction. The socket 102 passes through the limit support plate 101, and the inner screw barrel 402 passes through the socket 102. A cylinder body 103 corresponding to the socket 102 is provided below the limit support plate 101, and a connecting piece 6 is movably connected to the cylinder body 103. The lower thread of the inner screw barrel 402 is engaged in the connecting piece 6.

[0029] The application of one aspect of this embodiment is: during installation, the steel plate 4 with the microcrystalline glass plate 5 is placed on the soft magnetic plate 3, the soft magnetic plate 3 is used to adsorb the steel plate 4 thereon, and the inner screw barrel 402 is aligned with the socket 102 and inserted into the cylinder 103, and then the connecting piece 6 is pushed upward to contact the inner screw barrel 402, and then the connecting piece 6 is rotated to screw the connecting piece 6 onto the inner screw barrel 402, and then the connecting piece 6 and the angle plate 401 are used to clamp and fix it on the limiting support plate 101. When the steel plate 4 has warped, the upper end of the connecting piece 6 first contacts with the limiting support plate 101, and the connecting piece 6 is continued to be twisted so that it pulls the angle plate 401 to fit on the limiting support plate 101 through the inner screw barrel 402.

[0030] The thickness of the corner plate 401 of the present embodiment is equal to the sum of the thicknesses of the steel plate 4 and the microcrystalline glass plate 5, so that the corner plate 401 is coplanar with the microcrystalline glass plate 5. At the same time, the thickness of the corner plate 401 is increased relative to the steel plate 4 to improve the durability of the device. A groove 403 is provided on the corner plate 401, and a rubber strip 404 is glued in the groove 403. The rubber strip 404 fits the corner of the microcrystalline glass plate 5. The rubber strip 404 reduces the probability of the corner plate 401 being lifted up and its edge squeezing the microcrystalline glass plate 5 to cause damage.

[0031] In this embodiment, first reinforcing ribs 405 are provided on both sides of the angle plate 401. The first reinforcing ribs 405 are installed on the sides of the steel plate 4. The limiting support plate 101 is located between the two first reinforcing ribs 405, so as to facilitate the positioning and placement of the steel plate 4. At the same time, the first reinforcing ribs 405 are used to further reduce the probability of the angle plate 401 being bent downward by the connecting member 6. The first reinforcing ribs 405 are located on the upper part of the outer shell 1. The first reinforcing ribs 405 are used to reduce the probability of bending at the connection between the angle plate 401 and the steel plate 4.

[0032] In this embodiment, two second reinforcing ribs 106 are provided on the lower side of the limiting support plate 101. The second reinforcing ribs 106 are provided on the side of the outer shell 1. The cylinder 103 is installed between the two second reinforcing ribs 106. The second reinforcing ribs 106 improve the load-bearing capacity and bending resistance of the limiting support plate 101.

[0033] The connecting piece 6 of this embodiment includes an extrusion cylinder 601 located in the cylinder body 103, the lower part of the inner screw cylinder 402 is located in the extrusion cylinder 601, a stud 602 is installed at the lower end of the inner wall of the extrusion cylinder 601, the stud 602 is threadedly engaged in the inner screw cylinder 402, a rubber ring 603 is installed at the upper end of the extrusion cylinder 601, the rubber ring 603 is located on the circumference of the inner screw cylinder 402, the rubber ring 603 is located between the extrusion cylinder 601 and the limiting support plate 101, the lower end of the extrusion cylinder 601 is fixedly connected to an extension rod 604, the lower end of the extension rod 604 is fixedly connected to a knob 605, the knob 605 is located below the cylinder body 103, the rubber ring 603 is used to reduce the probability of wear caused by the rotation of the extrusion cylinder 601 and the friction with the limiting support plate 101, and at the same time improve the tightness of the connecting piece 6 to limit the diagonal plate 401.

[0034] The upper and lower ends of the cylinder 103 of this embodiment are respectively provided with a movable groove 104 and a through hole 105. The movable groove 104 is connected with the through hole 105 and the plug hole 102. The extrusion cylinder 601 and the rubber ring 603 are movably fitted in the movable groove 104. The extension rod 604 vertically penetrates the through hole 105. The movable groove 104 cooperates with the limiting support plate 101 to limit the displacement distance of the connecting member 6, thereby reducing the probability of the connecting member 6 being lost, and at the same time facilitating the alignment of the extrusion cylinder 601, the stud 602 and the inner screw cylinder 402.

[0035] The present invention is not limited to the above-mentioned implementation modes. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the protection scope of the present invention. The technology, shape, and structure that are not described in detail in the present invention are all known technologies.

Claims

1. A 3D printer hot bed structure, It is characterized in that include: A shell (1), wherein a heating plate (2) is mounted on the upper part of the shell (1), a soft magnetic plate (3) is glued onto the upper part of the heating plate (2), a steel plate (4) is magnetically attracted onto the upper part of the soft magnetic plate (3), a microcrystalline glass plate (5) is glued onto the upper part of the steel plate (4), angle plates (401) are arranged at the corners of the sides of the heating plate (2), and an inner screw barrel (402) is welded below the angle plate (401); The outer shell (1) is provided with a limit support plate (101) extending outward at each corner. The limit support plate (101) is located below the angle plate (401). The limit support plate (101) is provided with a plug hole (102) corresponding to the inner screw barrel (402) in the vertical direction. A cylinder body (103) corresponding to the plug hole (102) is provided below the limit support plate (101). A connecting piece (6) is movably connected to the cylinder body (103). The lower part of the inner screw barrel (402) is threadedly engaged in the connecting piece (6).

2. A 3D printer hot bed structure according to claim 1, It is characterized in that A warping groove (403) is provided on the corner plate (401), a rubber strip (404) is glued in the warping groove (403), and the rubber strip (404) is attached to the corner of the microcrystalline glass plate (5).

3. A 3D printer hot bed structure according to claim 1, It is characterized in that First reinforcing ribs (405) are provided on both sides of the angle plate (401), the first reinforcing ribs (405) are installed on the side of the steel plate (4), and the first reinforcing ribs (405) are located on the upper surface of the outer shell (1).

4. A 3D printer hot bed structure according to claim 1, It is characterized in that Two second reinforcing ribs (106) are provided on the lower side of the limiting support plate (101), and the second reinforcing ribs (106) are provided on the side of the outer shell (1).

5. A 3D printer hot bed structure according to claim 1, It is characterized in that The connecting member (6) comprises an extrusion cylinder (601) located in the cylinder body (103), a stud (602) is installed at the lower end of the inner wall of the extrusion cylinder (601), the stud (602) is threadedly engaged in the inner screw cylinder (402), a rubber ring (603) is installed at the upper end of the extrusion cylinder (601), an extension rod (604) is fixedly connected to the lower end of the extrusion cylinder (601), and a knob (605) is fixedly connected to the lower end of the extension rod (604).

6. A 3D printer hot bed structure according to claim 5, It is characterized in that The upper and lower ends of the cylinder (103) are respectively provided with a movable groove (104) and a through hole (105); the extrusion cylinder (601) and the rubber ring (603) are movably fitted in the movable groove (104); and the extension rod (604) vertically passes through the through hole (105).

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